Regulation No. 51-03 Proposal

Name:Regulation No. 51-03 Proposal
Description:Noise. Proposal for the 03 Series.
Official Title:Proposals for the 03 Series of Amendments to Regulation No. 51 (Noise of M and N Categories of Vehicles).
Country:ECE - United Nations
Date of Issue:2015-04-10
Amendment Level:Original
Number of Pages:76
Information:Provisional Date of Entry into Force: January 20, 2016
Vehicle Types:Agricultural Tractor, Bus, Car, Heavy Truck, Light Truck
Subject Categories:Drafts and Proposals (Historical)
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Keywords:

vehicle, test, annex, gear, speed, engine, regulation, sound, paragraph, vehicles, type, mass, acceleration, maximum, target, approval, point, reference, conditions, reported, line, level, ratio, condition, manufacturer, measurement, power, place, decimal, category, calculations, pressure, system, exhaust, rated, measurements, axle, requirements, rear, measured, results, series, laden, means, amendments, permissible, calculation, tested, technically, case

Text Extract:

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ECE/TRANS/WP.29/2015/62
PROPOSALS FOR THE 03 SERIES
OF AMENDMENTS TO
REGULATION NO. 51
(NOISE OF M AND N CATEGORIES OF VEHICLES)
ADOPTED AT THE 166TH SESSION – JUNE 2015
PROVISIONAL DATE OF ENTRY INTO FORCE: JANUARY 20, 2016

2.2.2.3. Vehicles having the same type of engine and/or different overall gear ratios may be
regarded as vehicles of the same type;
2.3. However, if the differences in Paragraph 2.2.2. provide for different target conditions, as
described in Paragraph 3.1.2.2. of Annex 3, these differences are to be considered as a
change of type;
2.4. "Mass of a vehicle in running order" (m ) means
(a)
In the case of a motor vehicle:
The mass of the vehicle, with its fuel tank(s) filled to at least 90% of its or their
capacity/ies, including the mass of the driver, of the fuel and liquids, fitted with the
standard equipment in accordance with the manufacturer's specifications and, when
they are fitted, the mass of the bodywork, the cabin, the coupling and the spare
wheel(s) as well as the tools;
(b)
In the case of a trailer:
The mass of the vehicle including the fuel and liquids, fitted with the standard equipment in
accordance with the manufacturer's specifications, and, when they are fitted, the mass of
the bodywork, additional coupling(s), the spare wheel(s) and the tools.
2.5. "Technically permissible maximum laden mass" (M) means the maximum mass
allocated to a vehicle on the basis of its construction features and its design performances;
the technically permissible laden mass of a trailer or of a semi-trailer includes the static
mass transferred to the towing vehicle when coupled;
2.6. "Vehicle length" means a dimension which is measured according to
ISO Standard 612-1978, term No. 6.1. In addition to the provisions of that standard, when
measuring the vehicle structural length the following devices shall not be taken into account:
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
(i)
(j)
Wiper and washer devices;
Front or rear marker-plates;
Customs sealing devices and their protection;
Devices for securing the tarpaulin and their protection;
Lighting equipment;
Rear view mirrors;
Rear space watching aids;
Air-intake pipes;
Length stops for demountable bodies;
Access steps;

2.12. "Engine" means the power source without detachable accessories.
Power source includes in this context all sources of motive power; for example, electric or
hydraulic power sources used alone or in combination with other power sources.
2.13. "Target acceleration" means acceleration at a partial throttle condition in urban traffic and
is derived from statistical investigations.
2.14. "Reference acceleration" means the required acceleration during the acceleration test on
the test track.
2.15. "Gear ratio weighting factor k" means a dimensionless numerical quantity used to
combine the test results of two gear ratios for the acceleration test and the constant speed
test.
2.16. "Partial power factor k " means a numerical quantity with no dimension used for the
weighted combination of the test results of the acceleration test and the constant speed test
for vehicles.
2.17. "Pre-acceleration" means application of acceleration control device prior to AA' for the
purpose of achieving stable acceleration between AA' and BB' as referred to in Figure 1 of
Appendix 1 to Annex 3.
2.18. "Locked gear ratios" means the control of transmission such that the transmission gear
cannot change during a test.
2.19. "Silencing system" means a complete set of components necessary for limiting the sound
produced by an engine, its intake and its exhaust (the exhaust manifold(s), the catalyst(s)
and emission after-treatment device(s) are not considered part of the silencing system;
these parts belong to the engine).
2.20. "Design family of exhaust silencing system or exhaust silencing system
components" means a group of silencing systems or components thereof in which all of
the following characteristics are the same:
(a)
(b)
(c)
(d)
The presence of net gas flow of the exhaust gases through the absorbing fibrous
material when in contact with that material;
The type of the fibres;
Where applicable, binder material specifications;
Average fibre dimensions;
(e) Minimum bulk material packing density in kg/m ;
(f)
Maximum contact surface between the gas flow and the absorbing material.

Symbol Unit Annex Paragraph Explanation
m kg Annex 3 2.2.7.2. front axle load in laden condition
m kg Annex 3 2.2.7.2. rear axle load in laden condition
AA'

Annex 3
3.1.1.
BB'

Annex 3
3.1.1.
CC'

Annex 3
3.1.1.
PP'

Annex 3
3.1.1.
line perpendicular to vehicle travel which
indicates beginning of zone in which to
record sound pressure level during test
line perpendicular to vehicle travel which
indicates end of zone in which to record
sound pressure level during test
line of vehicle travel through test surface
defined in ISO 10844
line perpendicular to vehicle travel which
indicates location of microphones
v km/h Annex 3 3.1.2.1. vehicle test speed
PMR – Annex 3 3.1.2.1.1.
power-to-mass ratio index to be used for
calculations; value to be reported and
used for calculations to the first decimal
place
P Kw Annex 3 3.1.2.1.1. rated total engine net power
l
m
Annex 3
3.1.2.1.2.
l
m
Annex 3
3.1.2.1.2.
v
km/h
Annex 3
3.1.2.1.2.
v
km/h
Annex 3
3.1.2.1.2.
v
km/h
Annex 3
3.1.2.1.2.
a
m/s
Annex 3
3.1.2.1.2.1.
reference length; value to be reported
and used for calculations to a precision of
0.01m (1cm)
length of vehicle; value to be reported
and used for calculations to a precision of
0.01m (1cm)
vehicle velocity when reference point
passes line AA' (see 5.1. for definition of
reference point); value to be reported and
used for calculations to the first decimal
place
vehicle velocity when reference point or
rear of vehicle passes line BB' (see 5.1.
for definition of reference point); value to
be reported and used for calculations to
the first decimal place
vehicle velocity when reference point
passes line PP' (see 5.1. for definition of
reference point); value to be reported and
used for calculations to the first decimal
place
acceleration at wide-open throttle from
AA' to BB'; value to be reported and used
for calculations to the second decimal
place

Symbol Unit Annex Paragraph Explanation
v
km/h
Annex 3
3.1.2.2.1.1.(a)
v
km/h
Annex 3
3.1.2.2.1.1.(b)
v
km/h
Annex 3
3.1.2.2.1.1. (c)
gear
-
Annex 3
3.1.2.2.1.1. (d)
gear
-
Annex 3
3.1.2.2.1.1. (d)
v
km/h
Annex 3
3.1.2.2.1.1. (d)
v
km/h
Annex 3
3.1.2.2.1.1. (d)
v
km/h
Annex 3
3.1.2.2.1.2. (b)
v
km/h
Annex 3
3.1.2.2.1.2. (b)
n
i=1,2
1/min
Annex 3
3.1.2.2.1.2. (d)
L
dB
Annex 3
3.1.3.1.
L
dB
Annex 3
3.1.3.1.
L
dB
Annex 3
3.1.3.1.
L
dB
Annex 3
3.1.3.1.
target vehicle velocity when it is
necessary that the reference point has to
pass line BB' (see 2.11.2. for definition of
reference point)
target vehicle velocity when certain
conditions are met
target vehicle velocity when certain
conditions are met
first of two gear ratios used for testing of
M having a maximum authorized mass
of more than 3,500kg, M , N , and N
where certain criteria on test conditions
are met
second of two gear ratios used for testing
of M having a maximum authorized
mass of more than 3,500kg, M , N , and
N where certain criteria on test
conditions are met
target vehicle velocity when certain
conditions are met
target vehicle velocity when certain
conditions are met
target vehicle velocity when certain
conditions are met
target vehicle velocity when certain
conditions are met
engine rotational speed when the
reference point passes BB' when certain
conditions are met
vehicle sound pressure level at constant
speed test for gear i; value to be reported
and used for calculations to the first
decimal place
vehicle sound pressure level at constant
speed test for gear (i + 1); value to be
reported and used for calculations to the
first decimal place
reported vehicle sound pressure level at
constant speed test; value to be reported
and used for calculations to the first
decimal place
vehicle sound pressure level at wideopen-throttle
test for gear i; value to be
reported and used for calculations to the
first decimal place

Symbol Unit Annex Paragraph Explanation
v
km/h
Annex 7
2.6.
L
dB
Annex 7
3.1.
n
1/min
Annex 7
3.1.
v
km/h
Annex 7
3.1.
L
dB
Annex 7
4.
L
dB
Annex 7
5.3.
n
1/min
Annex 7
5.3.
v
km/h
Annex 7
5.3.
k

Annex 7
6.2.
L
dB
Annex 7
6.2.
L
dB
Annex 7
6.2.
L
dB
Annex 7
6.2.
L
dB
Annex 7
6.2.
vehicle test speed at BB' for a gear κ and
at test point j; value to be reported and
used for calculations to the first decimal
place
reported vehicle sound pressure level for
gear ratio i from Annex 3; value to be
reported and used for calculations to the
first decimal place
reported vehicle engine speed for gear
ratio i from Annex 3
reported vehicle test speed for gear ratio i
at BB’ from Annex 3; value to be reported
and used for calculations to the first
decimal place
sound pressure level measured for a gear
κ and at a test point j; value to be
reported and used for calculations to the
first decimal place
reference sound pressure level for
reference sound assessment; value to be
reported and used for calculations to the
first decimal place
reference engine speed for reference
sound assessment
reference vehicle test speed for reference
sound assessment
partial power factor determined for the
L principle of ASEP
vehicle sound pressure level measured
for the L principle of ASEP; value to
be reported and used for calculations to
the first decimal place
Estimated urban sound pressure level
determined for the L principle of
ASEP; value to be reported and used for
calculations to the first decimal place
interim result for calculation of L ;
value to be reported and used for
calculations to the first decimal place
interim result for calculation of L ;
value to be reported and used for
calculations to the first decimal place

5. APPROVAL
5.1. Type approval shall only be granted if the vehicle type meets the requirements of
Paragraphs 6. and 7. below.
5.2. An approval number shall be assigned to each type approved. Its first two digits (at present
03 corresponding to the 03 series of amendments) shall indicate the series of amendments
incorporating the most recent major technical amendments made to the Regulation at the
time of issue of the approval. The same Contracting Party shall not assign the same number
to another vehicle type.
5.3. Notice of approval or of extension or of refusal or withdrawal of approval or of production
definitively discontinued of a vehicle type pursuant to this Regulation shall be communicated
to the Parties to the Agreement applying this Regulation, by means of a form conforming to
the model in Annex 1 to this Regulation.
5.4. There shall be affixed, conspicuously and in a readily accessible place specified on the
approval form, to every vehicle conforming to a vehicle type approved under this Regulation
an international approval mark consisting of:
5.4.1. A circle surrounding the letter "E" followed by the distinguishing number of the country which
has granted approval ;
5.4.2. The number of this Regulation, followed by the letter "R", a dash and the approval number
to the right of the circle prescribed in Paragraph 5.4.1.
5.5. If the vehicle conforms to a vehicle type approved under one or more other Regulations
annexed to the Agreement, in the country which has granted approval under this
Regulation, the symbol prescribed in Paragraph 5.4.1. need not be repeated; in such a case
the regulation and approval numbers and the additional symbols of all the Regulations
under which approval has been granted in the country which has granted approval under
this Regulation shall be placed in vertical columns to the right of the symbol prescribed in
Paragraph 5.4.1.
5.6. The approval mark shall be clearly legible and be indelible.
5.7. The approval mark shall be placed close to or on the vehicle data plate affixed by the
manufacturer.
5.8. Annex 2 to this Regulation gives examples of arrangements of the approval mark.
6. SPECIFICATIONS
6.1. General Specifications
6.1.1. The vehicle, its engine and its sound reduction system shall be so designed, constructed
and assembled as to enable the vehicle, in normal use, despite the vibration to which it may
be subjected, to comply with the provisions of this Regulation.

Vehicle
Category
N
N
Vehicles used for the carriage of goods
Phase 1
Phase 2
Phase 3
M ≤ 2.5t
72
71
69
M > 2.5t
74
73
71
P ≤ 135kW
77
75
74
P > 135kW
78
76
75
P ≤ 150kW 79 77 76
N
150kW < P ≤ 250kW 81 79 77
P > 250kW 82 81 79
6.2.2.1. For vehicle types of Category M derived from N vehicle types having a technically
permissible maximum laden mass above 2.5t and a R-point height greater than 850mm
from the ground, the limits of vehicles types of Category N having a technically permissible
maximum laden mass above 2.5t apply.
6.2.2.2. For vehicle types designed for off-road use, the limit values shall be increased by 2dB(A)
for M and N vehicles category and 1dB(A) for any other vehicle category.
For vehicle types of Category M the increased limit values for off-road vehicles are only
valid if the technically permissible maximum laden mass > 2t.
6.2.2.3. Limit values shall be increased by 2dB(A) for wheelchair accessible vehicles of category M
constructed or converted specifically so that they accommodate one or more persons
seated in their wheelchairs when travelling on the road, and armoured vehicles, as defined
in Paragraph 2.5.2. of R.E.3.
6.2.2.4. For vehicle types of Category M having a gasoline only engine, the applicable limit value is
increased by 2dB(A).
6.2.2.5. For vehicle types of Category N having a technically permissible maximum laden mass of
less than or equal to 2.5t, the engine capacity not exceeding 660cc and the power-to-mass
ratio (PMR) calculated by using the technically permissible maximum laden mass not
exceeding 35 and a horizontal distance "d" between the front axle and the driver's seat R
point of less than 1,100mm, the limits of the vehicle types of Category N having a
technically permissible maximum laden mass above 2.5t apply.

7. MODIFICATION AND EXTENSION OF APPROVAL OF A VEHICLE TYPE
7.1. Every modification of the vehicle type shall be notified to the Type Approval Authority which
approved the vehicle type. The Type Approval Authority may then either:
7.1.1. Consider that the modifications made are unlikely to have an appreciable adverse effect and
that in any case the vehicle still complies with the requirements, or
7.1.2. Require a further test report from the Technical Service responsible for conducting the tests.
7.2. Confirmation or refusal of approval, specifying the alterations shall be communicated by the
procedure specified in Paragraph 5.3. above to the Parties to the Agreement applying this
Regulation.
7.3. The Type Approval Authority issuing the extension of approval shall assign a series number
for such an extension and inform thereof the other Parties to the 1958 Agreement applying
this Regulation by means of a communication form conforming to the model in Annex 1 to
this Regulation.
8. CONFORMITY OF PRODUCTION
The conformity of production procedures shall comply with those set out in the Agreement,
Appendix 2 (E/ECE/324-E/ECE/TRANS/505/Rev.2) with the following requirements:
8.1. Vehicles approved according to this Regulation shall be so manufactured as to conform to
the type approved by meeting the requirements of Paragraph 6. above.
8.2. The minimum requirements for conformity of production control procedures of Annex 6 to
this Regulation shall be complied with.
8.3. The authority which has granted type approval may at any time verify the conformity control
methods applied in each production facility. The normal frequency of these verifications
shall be one every two years.
9. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
9.1. The approval granted in respect of a vehicle type pursuant to this Regulation may be
withdrawn if the requirements set forth above are not met.
9.2. If a Contracting Party to the Agreement applying this Regulation withdraws an approval it
has previously granted, it shall forthwith so notify the other Contracting Parties applying this
Regulation, by means of a communication form conforming to the model in Annex 1 to this
Regulation.
10. PRODUCTION DEFINITIVELY DISCONTINUED
10.1. If the holder of the approval completely ceases to manufacture a vehicle type approved in
accordance with this Regulation, he shall so inform the authority which granted the
approval. Upon receiving the relevant communication that authority shall inform thereof the
other Parties to the 1958 Agreement applying this Regulation by means of a communication
form conforming to the model in Annex 1 to this Regulation.

11.3.3. Until June 30, 2022 for vehicle types other than N and until June 30, 2023 for vehicles
types of Category N , no Contracting Party applying this Regulation shall refuse national or
regional type approval of a vehicle type-approved to Phase 1 (see Paragraph 6.2.2. above)
or the 02 series of amendments to this Regulation.
11.3.4. As from July 1, 2022 for vehicle types other than N and as from July 1, 2023 for vehicles
types of Category N , Contracting Parties applying this Regulation shall not be obliged to
accept for the purpose of national or regional type approval, a vehicle type approved to
Phase 1 (see Paragraph 6.2.2.1. above) or the preceding series of amendments to this
Regulation.
11.3.5. Even after the date of entry into force of the 03 series of amendments to this Regulation,
Contracting Parties applying this Regulation may continue for national or regional purposes
granting type approvals and extensions of type approvals to phase 1 (see Paragraph 6.2.2.
above) or the preceding series of amendments to this Regulation.
11.4. Transitional Provisions for Phase 3 (see Paragraph 6.2.2. above)
11.4.1. As from July 1, 2024 for vehicle types other than N , N and M and as from July 1, 2026 for
vehicles types of Category N , N and M , Contracting Parties applying this Regulation shall
grant type-approvals only if the vehicle type to be approved meets the requirements of
phase 3 (see Paragraph 6.2.2. above) of this Regulation as amended by the 03 series of
amendments.
11.4.2. Contracting Parties applying this Regulation shall not refuse to grant extensions of type
approvals for existing types which have been granted according to phase 2 according to
Paragraph 6.2.2. above.
11.4.3. Until June 30, 2026 for vehicle types other than N , N and M and until June 30, 2027 for
vehicles types of Category N , N and M , no Contracting Party applying this Regulation
shall refuse national or regional type approval of a vehicle type-approved to phase 2
according to Paragraph 6.2.2. above.
11.4.4. As from July 1, 2026 for vehicle types other than N , N and M and as from July 1, 2027 for
vehicles types of Category N , N and M , Contracting Parties applying this Regulation shall
not be obliged to accept for the purpose of national or regional type approval, a vehicle type
approved to phase 2 according to Paragraph 6.2.2. above.
11.4.5. Even after the date of entry into force of the 03 series of amendments to this Regulation,
Contracting Parties applying this Regulation may continue for national or regional purposes
granting type approvals and extensions of type approvals to phase 1 or phase 2 (see
Paragraph 6.2.2. above) or the preceding series of amendments to this Regulation.
11.5. Notwithstanding the transitional provisions above, Contracting Parties whose application of
this Regulation comes into force after the date of entry into force of the most recent series of
amendments are not obliged to accept type approvals which were granted in accordance
with any of the preceding series of amendments to this Regulation.
11.6. Until June 30, 2019, vehicles with a serial hybrid drive train which have a combustion engine
with no mechanical coupling to the power train are excluded from the requirements of
Paragraph 6.2.3. above.

ANNEX 1
COMMUNICATION
(maximum format: A4 (210 × 297mm))
Issued by:
Name of administration
.....................................
.....................................
.....................................
Concerning:
Approval granted
Approval extended
Approval refused
Approval withdrawn
Production definitively discontinued
of a vehicle type with regard to its sound emission pursuant to Regulation No. 51
Approval No. ........................................ Extension No. ....................................................
Section I
0.1. Make (trade name of manufacturer): .........................................................................................
0.2. Type: ..........................................................................................................................................
0.3. Means of identification of type if marked on the vehicle: ........................................................
0.3.1. Location of that marking: ............................................................................................................
0.4. Category of vehicle: ................................................................................................................
0.4.1. Subcategory according to Paragraph 6.2.2., the 2nd column of the table and the
Paragraphs 6.2.2.1. to 6.2.2.5. ..................................................................................................
0.5. Company name and address of manufacturer: .........................................................................
0.6. Names and Address(es) of assembly plant(s): ..........................................................................
0.7. Name and address of the manufacturer's representative (if any): .............................................

ANNEX 1 – APPENDIX 1
ADDENDUM TO THE COMMUNICATION FORM NO …
1. ADDITIONAL INFORMATION
1.1. Power Plant
1.1.1. Manufacturer of the engine: .......................................................................................................
1.1.2. Manufacturer's engine code: ......................................................................................................
1.1.3 Rated maximum net power: .......................................... kW at ...................... min or maximum
continuous rated power (electric motor)........................ kW
1.1.4. Pressure charger(s), Make and Type: .......................................................................................
1.1.5. Air filter, Make and Type: ...........................................................................................................
1.1.6. Intake silencer(s), Make and Type: ............................................................................................
1.1.7. Exhaust Silencer(s), Make and Type: ........................................................................................
1.1.8. Catalyst(s), Make and Type: ......................................................................................................
1.1.9. Particulate Trap(s), Make and Type: ..........................................................................................
1.2. Transmission
1.2.1. Type (mechanical, hydraulic, electric, etc.): ...............................................................................
1.3. Non-engine devices designed to reduce noise: .........................................................................
2. TEST RESULTS
2.1. Sound level of moving vehicle: ......................................................................................... dB(A)
2.2. Sound level of stationary vehicle: ............................ dB(A) at ........................................... min
2.2.1. Sound level of compressed air, service brake: ................................................................. dB(A)
2.2.2. Sound level of compressed air, parking brake: ................................................................. dB(A)
2.2.3. Sound level of compressed air, during the pressure regulator actuation: ........................ dB(A)
2.3. Data to facilitate in-use compliance test of hybrid vehicles, where an internal combustion
engine cannot operate when the vehicle is stationary
2.3.1. Gear (i) or position of the gear selector chosen for the test:

ANNEX 1 – APPENDIX 2
TECHNICAL INFORMATION DOCUMENT
0.
GENERAL
0.1.
Make (trade name of manufacturer): .........................................................................................
0.2.
Means of identification of type, if marked on the vehicle:
.......................................................
0.2.1.
Location of that marking: ............................................................................................................
0.3.
Category of vehicle:
................................................................................................................
0.4.
Company name and address of manufacturer: ........................................................................
0.5.
Name and address of the manufacturer's representative (if any): .............................................
0.6.
Name(s) and Address(es) of assembly plant(s): .......................................................................
1.
GENERAL CONSTRUCTION CHARACTERISTICS OF THE VEHICLE
1.1.
Photographs and/or drawings of a representative vehicle: .......................................................
1.2.
Number of axles and wheels:
..................................................................................................
1.2.1.
Powered axles (number, position, interconnection): ..................................................................
1.3.
Position and arrangement of the engine: ...................................................................................
2.
Masses and dimensions
(in kg and mm) (Refer to drawing where applicable):
...................................................................................................................................................
2.1.
Range of vehicle dimensions (overall):......................................................................................
2.1.1.
For chassis without bodywork: ..................................................................................................
2.1.1.1.
Length: .......................................................................................................................................
2.1.1.2.
Width: .........................................................................................................................................

3.2.2.1.2. Governor
3.2.2.1.2.1. Type: ..........................................................................................................................................
3.2.2.1.2.2. Speed at which Cut-off starts under load: .......................................................................... min
3.2.2.2. By fuel injection (positive ignition only): yes/no
3.2.2.2.1. Working principle: Intake manifold (single-/multi-point )/direct injection/other (specify)
3.2.3. Intake System
3.2.3.1. Air filter, drawings, or
3.2.3.1.1. Make(s): .....................................................................................................................................
3.2.3.1.2. Type(s): ......................................................................................................................................
3.2.3.2. Intake silencer, drawings,
3.2.3.2.1. Make(s): ....................................................................................................................................
3.2.3.2.2. Type(s): ......................................................................................................................................
3.2.4. Exhaust System
3.2.4.1. Description and/or drawing of the exhaust system: ...................................................................
3.2.4.2. Exhaust silencer(s): ....................................................................................................................
Type, marking of exhaust silencer(s): ........................................................................................
Where relevant for exterior noise, reducing measures in the engine compartment and on the
engine:
...................................................................................................................................................
3.2.4.3. Location of the exhaust outlet: ...................................................................................................
3.2.4.4. Exhaust silencer containing fibrous materials: ...........................................................................
3.2.5. Catalytic convertor: yes/no
3.2.5.1. Number of catalytic convertors and elements (provide the information below for each
separate unit): ............................................................................................................................
3.3. Electric Motor
3.3.1. Type (winding, excitation): .........................................................................................................

5. SUSPENSION
5.1. Tyres and Wheels
5.1.1. Tyre/wheel combination(s)
(a)
(b)
For tyres indicate size designation, load-capacity index and speed category symbol;
For wheels indicate rim size(s) and off-set(s).
5.1.2.
Upper and lower limits of rolling radii
5.1.2.1.
Axle 1: ........................................................................................................................................
5.1.2.2.
Axle 2: ........................................................................................................................................
5.1.2.3.
Axle 3: ........................................................................................................................................
5.1.2.4.
Axle 4: ........................................................................................................................................
etc.
6.
BODYWORK
6.1.
Type of bodywork: ......................................................................................................................
6.2.
Materials used and methods of construction: ............................................................................
7.
MISCELLANEOUS
7.1.
Details of any non-engine devices designed to reduce noise (if not covered by other items):
...................................................................................................................................................
Signed:
...................................................................................................................................................
Position in company: ......................................................................................................................................
Date:
...................................................................................................................................................

ANNEX 3
METHODS AND INSTRUMENTS FOR MEASURING THE SOUND MADE
BY MOTOR VEHICLES
1. MEASURING INSTRUMENTS
1.1. Acoustic Measurements
The apparatus used for measuring the sound level shall be a precision sound-level meter or
equivalent measurement system meeting the requirements of class 1 instruments (inclusive
of the recommended windscreen, if used). These requirements are described in "IEC
61672-1:2002: Precision sound level meters", second edition, of the International
Electrotechnical Commission (IEC).
Measurements shall be carried out using the "fast" response of the acoustic measurement
instrument and the "A" weighting curve also described in "IEC 61672-1:2002". When using a
system that includes a periodic monitoring of the A-weighted sound pressure level, a
reading should be made at a time interval not greater than 30ms.
The instruments shall be maintained and calibrated in accordance to the instructions of the
instrument manufacturer.
1.2. Calibration of the Entire Acoustic Measurement System for a Measurement Session
At the beginning and at the end of every measurement session the entire measurement
system shall be checked by means of a sound calibrator that fulfils the requirements for
sound calibrators of at least precision Class 1 according to IEC 60942:2003. Without any
further adjustment the difference between the readings of two consecutive checks shall be
less than or equal to 0.5dB.
If this value is exceeded, the results of the measurements obtained after the previous
satisfactory check shall be discarded.
1.3. Compliance with Requirements
Compliance of the acoustic measurement instrumentation shall be verified by the existence
of a valid certificate of compliance. These certificates shall be deemed to be valid if
certification of compliance with the standards was conducted within the previous 12 month
period for the sound calibration device and within the previous 24 month period for the
instrumentation system. All compliance testing shall be conducted by a laboratory, which is
authorized to perform calibrations traceable to the appropriate standards.
1.4. Instrumentation for Speed Measurements
The engine speed shall be measured with instrumentation having an accuracy of ±2% or
better at the engine speeds required for the measurements being performed.
The road speed of the vehicle shall be measured with instrumentation having an accuracy of
at least ±0.5km/h, when using continuous measurement devices.
If testing uses independent measurements of speed, this instrumentation shall meet
specification limits of at least ±0.2km/h.

The background noise (including any wind noise) shall be at least 10dB below the
A-weighted sound pressure level produced by the vehicle under test. If the difference
between the ambient noise and the measured sound is between 10 and 15dB(A), in order to
calculate the test results the appropriate correction shall be subtracted from the readings on
the sound-level meter, as in the following table:
Difference between ambient noise and sound to be measured dB(A) 10 11 12 13 14 15
Correction dB(A) 0.5 0.4 0.3 0.2 0.1 0.0
2.2. Vehicle
2.2.1. The vehicle shall be representative of vehicles to be put on the market as specified by the
manufacturer in agreement with the Technical Service to fulfil the requirements of this
Regulation.
Measurements shall be made without any trailer, except in the case of non-separable
vehicles. At the request of the manufacturer, measurements may be made on vehicles with
lift axle(s) in a raised position.
Measurements shall be made on vehicles at the test mass m specified according to the
following table.
Target mass, m , is used to denote the mass that N and N vehicles should be tested at.
The actual test mass of the vehicle can be less due to limitations on vehicle and axle
loading.
Vehicle
category
Vehicle test mass
M m = m ± 5%
N m = m ± 5%
N , N m = 50 [kg/kW] × P [kW]
Extra loading, m
, to reach the target mass, m
, of the vehicle shall be placed above the
rear axle(s).
The sum of the extra loading and the rear axle load in an unladen condition, m , is
limited to 75% of the technically permissible maximum laden mass allowed for the rear axle,
m . The target mass shall be achieved with a tolerance of ±5%.
If the centre of gravity of the extra loading cannot be aligned with the centre of the rear axle, the
test mass, m , of the vehicle shall not exceed the sum of the front axle in an unladen condition,
m
, and the rear axle load in an unladen condition, m
plus the extra loading,
m
, and the mass of the driver m .
The test mass for vehicles with more than two axles shall be the same as for a two-axle vehicle.
If the vehicle mass of a vehicle with more than two axles in an unladen condition, munladen, is
greater than the test mass for the two-axle vehicle, then this vehicle shall be tested without extra
loading.
If the vehicle mass of a vehicle with two axles, m
vehicle shall be tested without extra loading.
, is greater than the target mass, then this

2.2.7.
Calculation Procedure to Determine Extra Loading of N and N Vehicles only
2.2.7.1.
Calculation of Extra Loading
The target mass, m
, (per kW rated power) for two-axle vehicles of Category N and N is
specified in Table 2.2.1:
m
= 50 [kg/kW] × P [kW]
(1)
To reach the required target mass, m
, for a vehicle being tested, the unladen vehicle,
including the mass of the driver, m , shall be loaded with an extra mass, m
, which shall
be placed above the rear axle as given in Formula (8):
m
= m
+ m + m
(2)
The target mass, m
, shall be achieved with a tolerance of ±5%
The vehicle mass of the test vehicle in the unladen condition, m
, is calculated by
measuring on a scale the unladen front axle load, m
, and the unladen rear axle
load, m
, as given in Formula (3):
m
= m
+ m
(3)
By using Formulae (2) and (3), the extra loading, m
Formulae (4) and (5):
, is calculated as given in
m = m – (m + m ) (4)
m = m − (m + m + m ) (5)
The sum of the extra loading, m and the unladen rear axle load, m , is limited
to 75% of the technically permissible maximum laden mass for the rear axle, m , as
given in Formula (6):
0.75 m ≥ m + m (6)
The m is limited according to Formula (7):
m ≤ 0.75 − m (7)
If the calculated extra loading, m , in Formula (5) fulfils Formula (7), then the extra
loading is equal to Formula (5). The test mass, m , of the vehicle is as calculated from
Formula (8):
m = m + m + m + m (8)
In this case, the test mass of the vehicle is equal to the target mass
m = m (9)

3. METHODS OF TESTING
3.1. Measurement of Sound of Vehicles in Motion
3.1.1. General Conditions of Test
Two lines, AA' and BB', parallel to line PP' and situated respectively 10m ± 0.05m forward
and 10m ± 0.05m rearward of line PP' shall be marked out on the test runway.
At least four measurements shall be made on each side of the vehicle and for each gear.
Preliminary measurements may be made for adjustment purposes, but shall be disregarded.
The microphone shall be located at a distance of 7.5m ± 0.05m from the reference line CC'
of the track and 1.2m ± 0.02m above the ground.
The reference axis for free field conditions (see IEC 61672-1:2002) shall be horizontal and
directed perpendicularly towards the path of the vehicle line CC'.
3.1.2. Specific Test Conditions for Vehicles
3.1.2.1. Vehicles of Category M , M ≤ 3,500kg technically permissible maximum laden mass, N
The path of the centreline of the vehicle shall follow line CC' as closely as possible
throughout the entire test, from the approach to line AA' until the rear of the vehicle passes
line BB'. If the vehicle is fitted with more than two-wheel drive, test it in the drive selection
which is intended for normal road use.
If the vehicle is fitted with an auxiliary manual transmission or a multi-gear axle, the position
used for normal urban driving shall be used. In all cases, the gear ratios for slow
movements, parking or braking shall be excluded.
The test mass of the vehicle shall be according to the table of Paragraph 2.2.1.
The test speed v is 50km/h ± 1km/h. The test speed shall be reached, when the reference
point is at line PP'.
If the test speed is modified according to Paragraph 3.1.2.1.4.1.(e) of Annex 3 to this
Regulation, the modified test speed shall be used for both the acceleration and constant
speed test.
3.1.2.1.1. Power to mass ratio index (PMR)
PMR is defined as follows:
PMR = (P / m ) * 1,000kg/kW, where P is measured in kW and m is measured in kg
according to Paragraph 2.2.1. of this Annex.

If devices or measures described in Paragraph 3.1.2.1.4.2. can be used to control
transmission operation for the purpose of achieving test requirements, calculate a
using the equation:
a = ((v /3.6) - (v /3.6) )/(2 * (20+l))
Pre-acceleration may be used.
If devices or measures described in Paragraph 3.1.2.1.4.2. are not used, calculate a
using the equation:
a = ((v /3.6) - (v /3.6) )/(2 * (10+l))
Pre-acceleration shall not be used.
The location of depressing the accelerator shall be where the reference point of the vehicle
passes line AA'.
3.1.2.1.2.3. Target Acceleration
The target acceleration a defines the typical acceleration in urban traffic and is derived
from statistical investigations. This function depends on the PMR of a vehicle.
The target acceleration a is defined by:
a = 0.63 * log (PMR) - 0.09
3.1.2.1.2.4. Reference Acceleration
The reference acceleration a defines the required acceleration during the acceleration
test on the test track. It is a function depending on the power-to-mass ratio of a vehicle. That
function is different for specific vehicle categories.
The reference acceleration a
is defined by:
a = 1.59 * log (PMR) -1.41 for PMR ≥ 25
a = a = 0.63 * log (PMR) - 0.09 for PMR < 25
3.1.2.1.3. Partial Power Factor k
The partial power factor k (see Paragraph 3.1.3.1.) is used for the weighted combination of
the test results of the acceleration test and the constant speed test for vehicles of category
M and N and M ≤ 3,500kg technically permissible maximum laden mass
In cases other than a single gear test, a
(see Paragraph 3.1.3.1.).
shall be used instead of a

3.1.2.1.4.2. Vehicles with automatic transmission, adaptive transmissions and CVTs tested with nonlocked
gear ratios:
The gear selector position for full automatic operation shall be used.
The acceleration value a shall be calculated as defined in Paragraph 3.1.2.1.2.2.
The test may then include a gear change to a lower range and a higher acceleration. A gear
change to a higher range and a lower acceleration is not allowed. A gear shifting to a gear
ratio which is not used in urban traffic shall be avoided.
Therefore, it is permitted to establish and use electronic or mechanical devices, including
alternate gear selector positions, to prevent a downshift to a gear ratio which is typically not
used for the specified test condition in urban traffic.
The achieved acceleration a shall be greater or equal to a .
If possible, the manufacturer shall take measures to avoid an acceleration value a
greater than 2.0m/s .
The achieved acceleration a is then used for the calculation of the partial power factor
kp (see Paragraph 3.1.2.1.3.) instead a .
3.1.2.1.5. Acceleration Test
The manufacturer shall define the position of the reference point in front of line AA' of fully
depressing the accelerator. The accelerator shall be fully depressed (as rapidly as is
practicable) when the reference point of the vehicle reaches the defined point. The
accelerator shall be kept in this depressed condition until the rear of the vehicle reaches line
BB'. The accelerator shall then be released as rapidly as possible. The point of fully
depressing the accelerator shall be reported in Addendum to the Communication form
(Annex 1, Appendix 1). The Technical Service shall have the possibility of pretesting.
In the case of articulated vehicles consisting of two non-separable units regarded as a
single vehicle, the semi-trailer shall be disregarded in determining when line BB' is crossed.
3.1.2.1.6. Constant Speed Test
The constant speed test shall be carried out with the same gear(s) specified for the
acceleration test and a constant speed of 50km/h with a tolerance of ±1km/h between AA'
and BB'. During the constant speed test the acceleration control shall be positioned to
maintain a constant speed between AA' and BB' as specified. If the gear is locked for the
acceleration test, the same gear shall be locked for the constant speed test.
The constant speed test is not required for vehicles with a PMR < 25.

3.1.2.2.1.1. Manual transmission, automatic transmissions, adaptive transmissions or transmissions with
continuously variable gear ratios (CVTs) tested with locked gear ratios
Stable acceleration condition shall be ensured. The gear choice is determined by the target
conditions.
The following conditions for fulfilling the target conditions in Paragraph 3.1.2.2. of Annex 3 to
this Regulation are possible:
(a) If one gear choice fulfils both target conditions for the rotational engine speed n
and for the vehicle speed v , test with that gear.
(b)
If more than one gear choice fulfils both target conditions for the rotational engine
speed n and for the vehicle speed v , test in gear i that gives velocity
v closest to 35km/h.
(c) If two gear choices fulfil both target conditions for the rotational engine speed n
and for the vehicle speed v , and fulfil the following condition.
(v – v ) = (v – v )
then both gears are taken for further calculation of L .
(d) If one gear choice fulfils the target condition for the rotational engine speed n
but not the target condition for the vehicle speed v , use two gears, gear and
gear . The target conditions for the vehicle speed for these two gears are as follows:
gear
25km/h ≤ v ≤ 30km/h
and
gear
40km/h ≤ v ≤ 45km/h
Both gears, gear and gear shall fulfil the target rotational engine speed n .
Both gears shall be used for further calculation of L .
If only one of the gears fulfils the target rotational engine speed, n
that gear. This gear shall be used for further calculation of L .
, test with
(e)
If none of the two gears fulfils the target rotational engine speed n
under
condition d) then condition f) shall be chosen.

(c)
If under condition b) the target rotational engine speed n
cannot be fulfilled,
condition d) shall be chosen.
(d)
If the choice of the gear selector position cannot fulfil the target condition for the
rotational engine speed n but the target condition for the vehicle speed v ,
change the target condition for the vehicle speed to two vehicle target speeds as
follows:
Define v as
25km/h ≤ v ≤ 30km/h
and
Define v as
40km/h ≤ v ≤ 45km/h.
Conduct two tests, one with v and one with v .
Use the test where n is closest to the target rotational engine speed n but not
higher than n .
n ≤ n for i = 1, 2
If the vehicle cannot fulfil the condition:
n ≤ n for i = 1, 2
condition (e) shall be used.
(e)
If the choice of the gear selector position cannot fulfil the target conditions for the
rotational engine speed n and the target condition for the vehicle speed v
, change the target condition for the vehicle speed to the following:
v = v + 5km/h
Conduct the test with that vehicle speed v where n is closest to the target
rotational engine speed n . A gear change to a higher range and a lower
acceleration is allowed after the vehicle passes line PP’.
(f)
If the vehicle includes a transmission design that provides only a single gear selection
(D) that limits engine speed during the test, the vehicle shall be tested using only the
target vehicle speed v .
3.1.2.2.1.3. Powertrain with No Combustion Engine Rotational Engine Speed Available
Vehicles with a powertrain where no combustion engine rotational engine speed is available
shall fulfil only the target condition for the vehicle speed v

If a sound peak obviously out of character with the general sound pressure level is
observed, the measurement shall be discarded. At least four measurements for each test
condition shall be made on each side of the vehicle and for each gear ratio. Left and right
side may be measured simultaneously or sequentially. The first four valid consecutive
measurement results, within 2dB(A), allowing for the deletion of non-valid results (see
Paragraph 2.1.), shall be used for the calculation of the final result for the given side of the
vehicle. The results of each side shall be averaged separately. The intermediate result is the
higher value of the two averages mathematically rounded to the first decimal place.
The speed measurements at AA', BB', and PP' shall be noted and used in calculations to
the first significant digit after the decimal place.
The calculated acceleration a
shall be noted to the second digit after the decimal place.
3.1.3.1. Vehicles of Categories M , N and M ≤ 3,500kg technically permissible maximum laden
mass
The calculated values for the acceleration test and the constant speed test are given by:
L = L + k * (L – L )
L = L + k * (L – L )
Where k = (a – a )/(a – a )
In the case of a single gear ratio test the values are the test result of each test.
The final result is calculated by combining L and L . The equation is:
L = L – k * (L – L )
The weighting factor k gives the part power factor for urban driving. In cases other than a
single gear test, k is calculated by:
k = 1 – (a / a )
If only one gear was specified for the test, k is given by:
k = 1 – (a /a )
In cases where a is less than a :
k = 0
3.1.3.2. Vehicles of Categories M > 3,500kg technically permissible maximum laden mass, M , N ,
N
When the result of one test condition is used the final result L is equal to the
intermediate result.
When the results of two test conditions are used the arithmetic mean of the intermediate
results of the two averages for each side of the two conditions shall be calculated. The final
result L is the higher value of the two calculated averages.

3.2.5.3.1. Positions of the Microphone
3.2.5.3.1.1. The microphone shall be located at a distance of 0.5m ± 0.01m from the reference point of
the exhaust pipe defined in Figure 2 and at an angle of 45º (±5º) to the vertical plane
containing the flow axis of the pipe termination. The microphone shall be at the height of the
reference point, but not less than 0.2m from the ground surface. The reference axis of the
microphone shall lie in a plane parallel to the ground surface and shall be directed towards
the reference point on the exhaust outlet.
If two microphone positions are possible, the location farthest laterally from the vehicle
longitudinal centreline shall be used.
If the flow axis of the exhaust outlet pipe is at 90º to the vehicle longitudinal centreline, the
microphone shall be located at the point, which is furthest from the engine.
3.2.5.3.1.2. For vehicles having an exhaust provided with outlets spaced more than 0.3m apart, one
measurement is made for each outlet. The highest level shall be recorded.
3.2.5.3.1.3. In the case of an exhaust provided with two or more outlets spaced less than 0.3m apart
and which are connected to the same silencer; the microphone position is related to the
outlet nearest to one extreme edge of the vehicle or, when such outlet does not exist, to the
outlet, which is highest above the ground.
3.2.5.3.1.4. For vehicles with a vertical exhaust (e.g. commercial vehicles) the microphone shall be
placed at the height of the exhaust outlet. Its axis shall be vertical and oriented upwards. It
shall be placed at a distance of 0.5m ± 0.01m from the exhaust pipe reference point, but
never less than 0.2m from the side of the vehicle nearest to the exhaust.
3.2.5.3.1.5. For exhaust outlets located under the vehicle body, the microphone shall be located a
minimum of 0.2m from the nearest part of the vehicle, at a point closest to, but never less
than 0.5m from the exhaust pipe reference point, and at a height of 0.2m above the ground,
and not in line with the exhaust flow. The angularity requirement in Paragraph 3.2.5.3.1.2.
may not be met in some cases.
3.2.5.3.1.6. Examples of the position of the microphone, depending on the location of the exhaust pipe,
are given in Figures 3a-3d in Appendix 1 to Annex 3.
3.2.5.3.2. Operating Conditions of the Engine
3.2.5.3.2.1. Target Engine Speed
The target engine speed is defined as:
(a) 75% of the rated engine speed S for vehicles with a rated engine speed ≤ 5,000 min ;
(b)
3,750min for vehicles with a rated engine speed above 5,000min and below
7,500min ;
(c) 50% of the rated engine speed S for vehicles with a rated engine speed ≥ 7,500min .
If the vehicle cannot reach the engine speed as stated above, the target engine speed shall
be 5% below the maximum possible engine speed for that stationary test.

ANNEX 3 – APPENDIX
Figure 1
Measuring Positions for Vehicles in Motion
Figure 2
Reference point for Measurement of Sound Emitted by Stationary Vehicles

Figure 3a
Flowchart for vehicles tested according to Paragraph 3.1.2.1. of Annex 3 to this Regulation –
L Computation

Figure 3c
Flowchart for Vehicles Tested According to Paragraph 3.1.2.1. of Annex 3 to this Regulation –
Gear Selection Using Locked Gear PART 2

Figure 3e
Flowchart for Vehicles Tested According to Paragraph 3.1.2.1. of Annex 3 to this Regulation –
Gear Selection using Non-locked Gears

Figure 4b
Flowchart for Vehicles Tested According to Paragraph 3.1.2.2. of Annex 3 to this Regulation –
Test in Non-locked gears PART 1

Figure 4d
Flowchart for Vehicles Tested According to Paragraph 3.1.2.2. of Annex 3 to this Regulation –
Test for No- Combustion Engine Speed Available

ANNEX 4
EXHAUST SILENCING SYSTEMS CONTAINING ACOUSTICALLY ABSORBING
FIBROUS MATERIALS
1. GENERAL
Sound absorbing fibrous materials may be used in silencing systems or components thereof
only if
(a)
(b)
The exhaust gas is not in contact with the fibrous materials; or if
The silencing system or components thereof are of the same design family as
systems or components for which it has been proven, in the course of type approval
process in accordance with the requirements of this regulation for another vehicletype,
that they are not subject to deterioration.
Unless one of these conditions is fulfilled, the complete silencing system or
components thereof shall be submitted to a conventional conditioning using one of
three installations and procedures described below.
1.1. Continuous road operation for 10,000km
1.1.1. 50 ± 20% of this operation shall consist of urban driving and the remaining operation shall
be long-distance runs at high speed; continuous road operation may be replaced by a
corresponding test-track programme.
1.1.2. The two speed regimes shall be alternated at least twice.
1.1.3. The complete test programme shall include a minimum of 10 breaks of at least 3h duration
in order to reproduce the effects of cooling and any condensation which may occur.
1.2. Conditioning on a Test Bench
1.2.1. Using standard parts and observing the vehicle manufacturer's instructions, the silencing
system or components thereof shall be fitted to the vehicle referred to in Paragraph 3.3. of
this Regulation or the engine referred to in Paragraph 3.4. of this Regulation. In the former
case the vehicle shall be mounted on a roller dynamometer. In the second case, the engine
shall be coupled to a dynamometer.
1.2.2. The test shall be conducted in six 6h periods with a break of at least 12h between each
period in order to reproduce the effects of cooling any condensation which may occur.

1.3.7. Any drain holes shall be closed off during the test.
1.3.8. The entire test shall be completed within 48h.
If necessary, one cooling period will be observed after each hour.

ANNEX 5
COMPRESSED AIR NOISE
1. METHOD OF MEASUREMENT
The measurement is performed at microphone positions 2 and 6 according to Figure 1, with
the vehicle stationary. The highest A-weighted sound level is registered during venting the
pressure regulator and during ventilating after the use of both the service and parking
brakes.
The noise during venting the pressure regulator is measured with the engine at idling speed.
The ventilating noise is registered while operating the service and parking brakes; before
each measurement, the air-compressor unit has to be brought up to the highest permissible
operating pressure, and then the engine switched off.
2. EVALUATION OF THE RESULTS
For all microphone positions two measurements are taken. In order to compensate for
inaccuracies of the measuring equipment, the meter reading is reduced by 1dB(A), and the
reduced value is taken as the result of measurement. The results are taken as valid if the
difference between the measurements at one microphone position does not exceed 2dB(A).
The highest value measured is taken as the result. If this value exceeds the sound limit by
1dB(A), two additional measurements are to be taken at the corresponding microphone
position.
In this case, three out of the four results of measurement obtained at this position have to
comply with the sound limit.
3. LIMITING VALUE
The sound level shall not exceed the limit of 72dB(A).

ANNEX 6
CHECKS ON CONFORMITY OF PRODUCTION
1. GENERAL
These requirements are consistent with the test for checking conformity of production (COP)
according to Paragraph 8. of this Regulation.
2. TESTING PROCEDURE
The test site and measuring instruments shall be those as described in Annex 3.
2.1. The vehicle(s) under test shall be subjected to the test for measurement of sound of vehicle
in motion as described in Paragraph 3.1. of Annex 3.
2.2. Compressed Air Noise
Vehicles having maximum mass exceeding 2,800kg and equipped with compressed air
systems shall be subjected to an additional test for measurement of the compressed air
noise as described in Paragraph 1. of Annex 5.
2.3. Additional Sound Emission Provisions (ASEP)
The vehicle manufacturer shall assess the compliance with ASEP by an appropriate
evaluation (for example, but not limited to, part checks) or may perform the test described in
Annex 7.
3. SAMPLING AND EVALUATION OF THE RESULTS
One vehicle shall be chosen and subjected to the tests set out in Point 2. If the sound level
of the vehicle tested does not exceed by more than 1dB(A) the limit value prescribed in
Annex 3, and, where appropriate, Paragraph 3. of Annex 5, the vehicle type shall be
considered to conform to the requirements of this Regulation.
If one of the test results does not fulfil the COP requirements of this annex and of
Paragraph 8. of the main body of this Regulation two more vehicles of the same type shall
be tested pursuant to Paragraph 2. above.
If the test results for the second and the third vehicle fulfil the COP requirements of this
annex and of Paragraph 8. of the main body of this Regulation, the vehicle is considered in
compliance with regard to the COP.
If one of the test results of the second or third vehicle does not fulfil the COP requirements
of this annex and of paragraph 8. of the main body of this Regulation the vehicle type shall
be considered not to conform to the requirements of this Regulation and the manufacturer
shall take the necessary measures to re-establish the conformity.

Vehicle speed V :
if n is reached in one gear v ≤ 70km/h
in all other cases v ≤ 80km/h
gears κ ≤ gear i as determined in Annex 3
If the vehicle, in the lowest valid gear, does not achieve the maximum engine speed below
70km/h, the vehicle speed limit is 80km/h.
2.4. Gear Ratios
The ASEP requirements apply to every gear ratio κ that leads to test results within the
control range as defined in Paragraph 2.3. of this Annex.
In case of vehicles with automatic transmissions, adaptive transmissions and CVT's tested
with non-locked gear ratios, the test may include a gear ratio change to a lower range and a
higher acceleration. A gear change to a higher range and a lower acceleration is not
allowed. A gear shift which leads to a condition that is not in compliance with the boundary
conditions shall be avoided. In such a case, it is permitted to establish and use electronic or
mechanical devices, including alternate gear selector positions.
2.5. Target Conditions
The sound emission shall be measured in each valid gear ratio at the four test points as
specified below.
The first test point P is defined by using an entry speed v of 20km/h. If a stable
acceleration condition cannot be achieved, the speed shall be increased in steps of 5km/h
until a stable acceleration is reached.
The fourth test point P is defined by the maximum vehicle speed at BB' in that gear ratio
within the boundary conditions according to Paragraph 2.3.
The other two test points are defined by the following formula:
Test Point P : v = v + ((j - 1) / 3) * (v - v ) for j = 2 and 3
Where:
v = vehicle speed at BB' of test point P
v = vehicle speed at BB' of test point P
Tolerance for v
: ± 3km/h
For all test points the boundary conditions as specified in Paragraph 2.3. shall be met.

3.2.1. Calculation of the Slope of the Regression Line for Each Gear
The linear regression line is calculated using the anchor point and the four correlated
additional measurements.
Slope
=

( n − n)( L − L)
∑ ( n − n)
(in dB(A)/1,000min )
1
1
With L = ∑L
and n = ∑n
;
5
5
where n = engine speed measured at line BB'
3.2.2. Slope of the Regression Line for Each Gear
The slope of a particular gear for the further calculation is the derived result of the
calculation in Paragraph 3.2.1. rounded to the first decimal place, but not higher than
5dB(A)/1,000min .
3.3. Calculation of the Linear Sound Level Increase Expected for Each Measurement
The sound level L for measurement point j and gear κ shall be calculated using the
engine speeds measured for each measurement point, using the slope specified in
Paragraph 3.2. above to the specific anchor point for each gear ratio.
For n ≤ n :
L = L κ + (Slope - Y) * (n - n ) / 1,000
For n > n :
L = L + (Slope + Y) * (n - n ) / 1,000
Where Y= 1
3.4. Samples
On request of the type approval authority two additional runs within the boundary conditions
according to Paragraph 2.3. of this Annex shall be carried out.

For vehicles fitted with an automatic gear box having more than four forward gears and
equipped with an engine developing a rated maximum net power greater than 140kW
(according to Regulation No. 85) and having a maximum-power/maximum-mass ratio
greater than 75, L shall be less than or equal to 78dB(A).
6. EVALUATION OF ASEP USING THE PRINCIPLE OF L
6.1. General
This evaluation procedure is an alternative selected by the vehicle manufacturer to the
procedure described in Paragraph 3. of this Annex and is applicable for all vehicle
technologies. It is the responsibility of the vehicle manufacturer to determine the correct
manner of testing. Unless otherwise specified, all testing and calculation shall be as
specified in Annex 3 to this Regulation.
6.2. Calculation of L
From any L
as measured according to this annex, L
shall be calculated as
follows:
(a) Calculate a using acceleration calculation from Paragraph 3.1.2.1.2.1. or
3.1.2.1.2.2. of Annex 3 to this Regulation, as applicable;
(b) Determine the vehicle speed (v ) at BB during the L test;
(c) Calculate k as follows:
k = 1 - (a /a )
Test results where a are less than a shall be disregarded.
(d) Calculate L as follows:
L = L - k * (L - L )
For further calculation, use the L from Annex 3 to this Regulation without
rounding, including the digit after the decimal (xx.x).
(e) Calculate L as follows:
L = L - L
(f)
Calculate L= as follows:
L = L - (0.15 * (V - 50))
(g)
Compliance with limits:
L
shall be less than or equal to 3.0dB(A).

Noise. Proposal for the 03 Series.