Regulation No. 24-03

Name:Regulation No. 24-03
Description:Compression Ignition Engines - Emission of Visible Pollutants - Power Measurement.
Official Title:Uniform Provisions Concerning the: I The Approval of Compression Ignition (C.I.) Engines with Regard to the Emission of Visible Pollutants; II The Approval of Motor Vehicles with Regard to the Installation of C.I. Engines of an Approved Type; III The Approval of Motor Vehicles Equipped with C.I. Engines with Regard to the Emissions of Visible Pollutants by the Engine; IV The Measurement of Power of C.I. Engine.
Country:ECE - United Nations
Date of Issue:1971-08-23
Amendment Level:03 Series, Supplement 3
Number of Pages:59
Vehicle Types:Bus, Car, Component, Heavy Truck, Light Truck, Motorcycle
Subject Categories:Emissions and Fuel Consumption
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Keywords:

engine, approval, regulation, vehicle, test, annex, type, power, paragraph, speed, tests, pressure, air, engines, exhaust, fuel, measured, prescribed, system, approved, manufacturer, visible, production, pollutants, opacimeter, temperature, maximum, absorption, emission, coefficient, conditions, gas, equipment, measurement, net, regard, means, part, extension, pipe, speeds, granted, characteristics, number, case, measuring, values, acceleration, point, mark

Text Extract:

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E/ECE/324 )
E/ECE/TRANS/505 ) Rev.1/Add.23/Rev.2/Amend.3
April 5, 2007
STATUS OF UNITED NATIONS REGULATION
ECE 24
UNIFORM PROVISIONS CONCERNING:
I
II
III
IV
THE APPROVAL OF COMPRESSION IGNITION (C.I.) ENGINES WITH REGARD TO
THE EMISSION OF VISIBLE POLLUTANTS,
THE APPROVAL OF MOTOR VEHICLES WITH REGARD TO THE INSTALLATION OF
C.I. ENGINES OF AN APPROVED TYPE,
THE APPROVAL OF MOTOR VEHICLES EQUIPPED WITH C.I. ENGINES WITH
REGARD TO THE EMISSIONS OF VISIBLE POLLUTANTS BY THE ENGINE,
THE MEASUREMENT OF POWER OF C.I. ENGINE
Incorporating:
03 series of amendments
Date of Entry into Force: 20.04.86
Supplement 1 to the 03 series of amendments
Date of Entry into Force: 27.03.01
Supplement 2 to the 03 series of amendments
Date of Entry into Force: 23.06.05
Supplement 3 to the 03 series of amendments
Date of Entry into Force: 02.02.07

UNIFORM PROVISIONS CONCERNING:
I
II
III
IV
THE APPROVAL OF COMPRESSION IGNITION (C.I.) ENGINES WITH REGARD TO THE
EMISSION OF VISIBLE POLLUTANTS
THE APPROVAL OF MOTOR VEHICLES WITH REGARD TO THE INSTALLATION OF C.I.
ENGINES OF AN APPROVED TYPE
THE APPROVAL OF MOTOR VEHICLES EQUIPPED WITH C.I. ENGINES WITH REGARD TO
THE EMISSION OF VISIBLE POLLUTANTS BY THE ENGINE
THE MEASUREMENT OF POWER OF C.I. ENGINE
REGULATION
CONTENTS
1. Scope
2. Definitions Common to Parts I, II and III
PART I
EMISSION OF VISIBLE EXHAUST POLLUTANTS FROM C.I. ENGINES
3. Definitions applicable to Part I only
4. Application for Approval
5. Approval
6. Specifications and Tests
7. Modification of the Engine Type and Extension of Approval
8. Conformity of Production
9. Penalties for Non-conformity of Production
10. Production Definitely Discontinued
11. Names and addresses of Technical Services Responsible for Conducting Approval Tests, and of
Administrative departments

ANNEXES
Annex 1
Annex 2
Annex 3
Annex 4
Annex 5
Annex 6
Annex 7
Annex 8
Annex 9
Annex 10
Essential Characteristics of the Vehicle and the C.I. Engine and Information Concerning the
Concerning the Conduct of Tests
Communication Concerning, Either Approval, Refusal of Approval, Extension of Approval,
Withdrawal of Approval, Production Definitely Discontinued of a Vehicle/Engine Type with
Regard to Emissions, or Measurement of Power of the Engine only, Pursuant to
Regulation No. 24
Arrangements of Approval Marks
Test at Steady Speeds Over the Full-load Curve
Test Under Free Acceleration
Specifications of Reference Fuel Prescribed for Approval Tests and to Verify Conformity of
Production
Limit Values Applicable for the Test at Steady Speeds
Characteristics of Opacimeters
Installation and Use of the Opacimeters
"ECE" Method for Measuring the Net Power of C.I. Engines

2.5 "Opacimeter" means an instrument for continuous measurement of the light absorption
coefficients of the exhaust gases emitted by vehicles, as specified in Annex 8 to this
Regulation;
2.6 "Maximum rated speed" means maximum speed permitted by the governor at full load;
2.7 "Minimum rated speed" means:
2.7.1 either the highest of the following three engine speeds:
45% of maximum net power speed
1 000 rpm
minimum speed permitted by the idling control
2.7.2 or such lower speed as the manufacturer may request.
2.8. Hybrid Vehicles (HV)
2.8.1. "Hybrid vehicle (HV)" means a vehicle with at least two different energy converters and two
different energy storage systems (on vehicle) for the purpose of vehicle propulsion.
2.8.2. "Hybrid electric vehicle (HEV)" means a vehicle that, for the purpose of mechanical
propulsion, draws energy from both of the following on-vehicle sources of stored
energy/power:


a consumable fuel
an electrical energy/power storage device (e.g.: battery, capacitor, flywheel/generator)
3. DEFINITIONS
PART I
EMISSION OF VISIBLE EXHAUST POLLUTANTS FROM C.I. ENGINES
For the purpose of Part I of this Regulation:
3.1 Approval of a C.I. engine means the approval with regard to the limitation of the emission of
visible exhaust pollutants from the engine;
3.2 Engine type means a category of a C.I. engine for installation in a motor vehicle which does
not differ in such essential characteristics as those defined in Annex 1 to this Regulation
except for modifications as permitted by Paragraphs 7.2 and 7.3 of this Regulation;
3.3 An engine representative of the type to be approved means the engine which develops the
highest net power within the engine type;
3.4 Other applicable definitions to this Part I are given in Paragraph 2 to this Regulation.

5.4. There shall be affixed, conspicuously and in a readily accessible place specified on the
approval form, to every engine conforming to an engine 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;
5.4.3. The following additional symbol: a rectangle surrounding a figure expressing in m the
absorption coefficient obtained, at the time of approval, during the tests under free
acceleration, and determined by the procedure described in Annex 5 of this Regulation;
5.4.4. Alternatively instead of affixing these approval marks and symbols to the engine the
manufacturer may decide that each engine type approved under this Regulation shall be
accompanied by a document giving this information so that the approval marks and symbol
can be attached to the vehicle in accordance with Paragraph 14.4. of this Regulation.
5.5. If the engine conforms to a 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 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 the engine identification figures provided by the
manufacturer.
5.8. Annex 3 to this Regulation gives examples of the arrangements of the approval mark.
6. SPECIFICATIONS AND TESTS
6.1. General
The components liable to affect the emission of visible pollutants shall be so designed,
constructed and assembled as to enable the engine in normal use, despite the vibration to
which it may be subjected, to comply with the provisions of this Regulation.

6.4. Equivalent measuring instruments shall be allowed. If an instrument other than those
described in Annex 8 to this Regulation is used, its equivalence for the engine considered
shall be required to be proved.
7. MODIFICATION OF THE ENGINE TYPE AND EXTENSION OF APPROVAL
7.1. Every modification of an engine within an engine type with regard to the characteristics in
Annex 1, shall be notified to the administrative department which approved the engine
type. Details of these modifications shall be declared in the format of Annex 1. Within the
constraints imposed by Paragraphs 7.2. and 7.3., the department 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 engine still complies with the requirements; or
7.1.2. Require a further test report from the technical service responsible for conducting the test.
7.2. For the purpose of this Regulation with regard to the emission of visible pollutants the
modifications may be classified as follows:
1) Modifications which require a new approval with tests.
2) Modifications which require a new approval without tests.
3) Modifications which may require new tests however without new approval.
4) Modifications which do not require complementary tests or new approvals.
The above classifications 1), 2), 3) and 4) are marked on each line of the corresponding
characteristics in Annex 1.
7.3. Irrespective of these classifications in Paragraph 7.2. a new approval with tests,
i.e. Classification 1), will automatically be required unless the engine also respects the
following conditions:
Maximum rated speed not greater than 100% nor less than 75% of that of the engine in the
approval test;
Minimum rated speed not less than that of the engine in the approval test;
Torque rating not greater than 100%, nor less than 70% of that of the engine at that speed in
the approval test;
Steady state absorption values are not greater than 1,1 times the values obtained in the
approval test and do not exceed the prescribed limits in Annex 7;
Exhaust back pressure not greater than that of the engine in the type approval test;
Exhaust system volume does not differ by more than 40%;

9. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
9.1. The approval granted in respect of an engine type pursuant to this Regulation may be
withdrawn if the requirements laid down in Paragraph 8.1. above are not complied with or if
the engine has failed to pass the test prescribed in Paragraph 8.3. above.
9.2. If a Party to the Agreement which applies this Regulation withdraws an approval it has
previously granted, it shall forthwith so notify the other Contracting Parties to the Agreement
which apply this Regulation, by means of a copy of the approval form bearing at the end, in
large letters, the signed and dated annotation "APPROVAL WITHDRAWN".
10. PRODUCTION DEFINITELY DISCONTINUED
If the holder of the approval completely ceases production of the engine 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 Agreement applying this Regulation, by means of a copy of the approval
form bearing at the end, in large letters, the signed and dated annotation "PRODUCTION
DISCONTINUED".
11. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR
CONDUCTING APPROVAL TESTS, AND OF ADMINISTRATIVE DEPARTMENTS
The Parties of the Agreement which apply this Regulation shall communicate to the United
Nations Secretariat the names and addresses of the technical services responsible for
conducting approval tests and of the administrative departments which grant approval and to
which forms certifying approval or extension or refusal or withdrawal of approval, issued in
other countries, are to be sent.
PART II
THE INSTALLATION ON ROAD VEHICLES OF TYPE APPROVED C.I. ENGINES
12. DEFINITIONS
For the purpose of Part II of this Regulation:
12.1. "Approval of a vehicle" means the approval of a vehicle type with regard to the installation of
type approved engines for the limitation of visible pollutants from the engine;
12.2. "Vehicle type" means a category of power-driven vehicles which do not differ in such essential
respects as the vehicle and engine characteristics defined in Annex 1 to this Regulation;
12.3. Other definitions applicable to this Part II are contained in Paragraph 2 of this Regulation.

14.5. If the vehicle conforms to a 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 14.4.1. 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 14.4.1.
14.6. The approval mark and the additional symbol shall be clearly legible and be indelible.
14.7. The approval mark shall be placed close to or on the vehicle data plate affixed by the
manufacturer.
14.8. Annex 3 to this Regulation gives examples of the arrangements of the approval mark and of
the additional symbol.
15. SPECIFICATIONS AND TESTS
15.1. General
The diesel engine fitted on the vehicle shall be of a type approved under Part I of this
Regulation. The components liable to affect the emission of visible pollutants 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.
It shall be possible to inspect the vehicle for roadworthiness by determining its performance in
relation to the data collected for type approval as reported in Paragraph 11.1.2.2 of Annex 2 to
this Regulation. If this inspection requires a special procedure, this shall be detailed in the
service manual (or equivalent media). This special procedure shall not require the use of
special equipment other than that provided with the vehicle.
15.2. Specifications concerning cold-start devices
15.2.1. The cold-start device shall be so designed and constructed that it cannot be brought into or
kept in action when the engine is running normally.
15.2.2. The provisions of Paragraph 15.2.1. above shall not apply if at least one of the following
conditions is met:
15.2.2.1. The light absorption coefficient of the gases emitted by the engine at steady speeds when
measured by the procedure prescribed in Annex 4 to this Regulation with the cold-start device
operating, is within the limits prescribed in Annex 7 to this Regulation.
15.2.2.2. Keeping the cold-start device in operation causes the engine to stop within a reasonable time.

17.3. Conformity of the vehicle with the type approved shall be verified on the basis of the
description given in the approval form according to Annex 2 to this Regulation. In addition,
verifying tests shall be carried out in the following conditions:
17.3.1. A vehicle with an engine which has not been run-in shall be subjected to the test under free
acceleration prescribed in Annex 5 to this Regulation. The vehicle shall be deemed to
conform to the vehicle type approved if the absorption coefficient determined does not exceed
by more than 0,5 m the figure shown in the approval mark or document
(See Paragraph 17.1. above). On the request of the manufacturer commercially available fuel
may be used rather than the reference fuel. In the case of dispute, reference fuel has to be
used.
17.3.2. If the figure determined in the test referred to in Paragraph 17.3.1. above exceeds by more
than 0,5 m the figure shown in the approval mark or document (See Paragraph 17.1. above)
the engine shall be subjected to the test at steady speeds over the full load curve as
prescribed in Annex 4 to this Regulation. The visible emission levels shall not exceed the
limits prescribed in Annex 7 to this Regulation.
18. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
18.1. The approval granted in respect of a vehicle type pursuant to this Regulation may be
withdrawn if the requirements laid down in Paragraph 17.1. above are not complied with or if
the vehicle has failed to pass the test prescribed in Paragraph 17.3. above.
18.2. If a Party to the Agreement which applies this Regulation withdraws an approval it has
previously granted, it shall forthwith so notify the other Contracting Parties to the Agreement
which apply this Regulation, by means of a copy of the approval form bearing at the end, in
large letters, the signed and dated annotation "APPROVAL WITHDRAWN".
19. PRODUCTION DEFINITELY DISCONTINUED
If the holder of the approval completely ceases production of the vehicle 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 Agreement applying this Regulation, by means of a copy of the approval
form bearing at the end, in large letters, the signed and dated annotation "PRODUCTION
DISCONTINUED".
20. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR
CONDUCTING APPROVAL TESTS, AND OF ADMINISTRATIVE DEPARTMENTS
The Parties to the Agreement which apply this Regulation shall communicate to the United
Nations Secretariat the names and addresses of the technical services responsible for
conducting approval tests and of the administrative departments which grant approval, and to
which forms certifying approval or extension or refusal or withdrawal of approval, issued in
other countries, are to be sent.

23.4. 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:
23.4.1. A circle surrounding the Letter "E" followed by the distinguishing number of the country which
has granted approval;
23.4.2. 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.;
23.4.3. The following additional symbol: a rectangle surrounding a figure expressing in m the
corrected absorption coefficient obtained, at the time of approval, during the test under free
acceleration, and determined at the time of approval by the procedure described in Annex 5,
Paragraph 3.2. to this Regulation.
23.5. If the vehicle conforms to a 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 23.4.1. 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 23.4.1..
23.6. The approval mark and the additional symbol shall be clearly legible and be indelible.
23.7. The approval mark shall be placed close to or on the vehicle data plate affixed by the
manufacturer.
23.8. Annex 3 to this Regulation gives examples of the arrangements of the approval mark and of
the additional symbol.
24. SPECIFICATIONS AND TESTS
24.1. General
The components liable to affect the emission of visible pollutants 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.
It shall be possible to inspect the vehicle for roadworthiness by determining its performance in
relation to the data collected for type approval as reported in Paragraph 11.1.2.2 of Annex 2 to
this Regulation. If this inspection requires a special procedure, this shall be detailed in the
service manual (or equivalent media). This special procedure shall not require the use of
special equipment other than that provided with the vehicle.

26. CONFORMITY OF PRODUCTION
26.1. Every vehicle bearing an approval mark as prescribed under this Regulation shall conform,
with regard to components affecting the emission of visible pollutants by the engine to the
vehicle type approved.
26.2. In order to verify conformity as prescribed in Paragraph 26.1., above a vehicle bearing the
approval mark required by this Regulation shall be taken from the series.
26.3. Conformity of the vehicle with the type approved shall be verified on the basis of the
description given in the approval form. In addition, verifying tests shall be carried out in the
following conditions:
26.3.1. A vehicle which has not been run-in shall be subjected to the test under free acceleration
prescribed in Annex 5 to this Regulation. The vehicle shall be deemed to conform to the type
approved if the absorption coefficient determined does not exceed by more than 0,5 m the
figure shown in the approval mark (See Paragraph 26.1. above). On the request of the
manufacturer, commercially available fuel may be used rather than the reference fuel. In the
case of dispute, reference fuel has to be used.
26.3.2. If the figure determined in the test referred to in Paragraph 26.3.1. above exceeds by more
than 0,5 m the figure shown in the approval mark, the engine of the vehicle shall be
subjected to the test at steady speeds over the full-load curve, as prescribed in Annex 4 to this
Regulation. The visible emission levels shall not exceed the limits prescribed in Annex 7 to
this Regulation.
27. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
27.1. The approval granted in respect of a vehicle type pursuant to this Regulation may be
withdrawn if the requirements laid down in Paragraph 26.1. above are not complied with or if
the vehicle or vehicles taken have failed to pass the test prescribed in Paragraph 26.3. above.
27.2. If a Party to the Agreement which applies this Regulation withdraws an approval it has
previously granted, it shall forthwith so notify the other Contracting Parties to the Agreement
which apply this Regulation, by means of a copy of the approval form bearing at the end, in
large letters, the signed and dated annotation "APPROVAL WITHDRAWN".
28. PRODUCTION DEFINITELY DISCONTINUED
If the holder of the approval completely ceases production of a vehicle 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 Agreement applying this Regulation, by means of a copy of the approval
form bearing at the end, in large letters, the signed and dated annotation "PRODUCTION
DISCONTINUED".
29. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR
CONDUCTING APPROVAL TESTS, AND OF ADMINISTRATIVE DEPARTMENTS
The Parties to the Agreement which apply this Regulation shall communicate to the United
Nations Secretariat the names and addresses of the technical services responsible for
conducting approval tests and of the administrative departments which grant approval and to
which forms certifying approval or extension or refusal or withdrawal of approval, issued in
other countries, are to be sent.

2. COOLING SYSTEM: LIQUID/AIR COOLING
2.1. Characteristics of Liquid-Cooling System
2.1.1. Nature of liquid: ........................................................................................................... (3)
2.1.2. Circulating pump: description or make(s) and type(s) ........................................... (3)
2.1.3. Radiator/fan system: description ................................................................................ (3)
2.1.4. Drive ratio(s): ........................................................................................................... (3)
2.1.5. Max. temperature at outlet ....... ...............................................................................°C (3)
2.2. Characteristics of air-cooling system
2.2.1. Blower system: characteristics or make(s) and type(s) ............................................ (3)
2.2.2. Drive ratio(s) ............................................................................................................ (3)
2.2.3. Temperature regulating system: Yes/no Brief description..................................... (3)
2.2.4. Air ducting: description............................................................................................... (3)
2.2.5. Max. temperature at a characteristic place: ............................................................°C (3)
3. AIR INTAKE SYSTEM AND FUEL FEED
3.1. Air Intake System
3.1.1. Description and drawings of air intake system and its accessories (heating device, intake
silencers air filter, etc) or make(s) and type(s) if the test is made with complete system as
supplied by the vehicle manufacturer, in a vehicle or on a test bench: (3)
3.1.2. Maximum permitted depression of air intake at a characteristic place (specify location of
measurement): ....................................................................................................kPa (3)
3.2. Pressure charger: Yes/No (1)
3.2.1. Description of the pressure charger system............................................................... (3)
3.2.2. Characteristics or make(s) and type(s):...................................................................... (3)
3.2.3. Max. temperature of the air at the outlet of the intake intercooler: .....................°C (3)

E 3.4.
Cold start system
Description or make(s) and type(s)............................................................................. (3)
E 3.5.
Additional anti-smoke devices (if any, and if not covered by another heading):
Description of characteristics ...................................................................................... (3)
4. VALVE TIMING
Maximum lift of valves and angles of opening and closing in relation to dead centres
(nominal values) (3)
5. EXHAUST SYSTEM
5.1. Description of exhaust equipment if the test is made with the complete equipment
provided by the engine or vehicle manufacturer ........................................................
Specify the back pressure at maximum net power and the location of
measurement.......................................................................................................kPa (3)
Indicate the effective volume of the exhaust ...............................................cm
5.2. If the test bench equipment is used, specify the back pressure at maximum net
power and the location of measurement ............................................................kPa (3)
Indicate the effective volume of the exhaust ...............................................cm
6. LUBRICATION SYSTEM
6.1. Description of system.................................................................................................. (3)
6.2. Circulating pump: Yes/No
Description or make(s) and type(s)............................................................................. (3)
6.3. Oil cooler: Yes/No
Description or make(s) and type(s)............................................................................. (3)
6.4. Mixture with fuel: Yes/No
(Lubrication oil/fuel ratio)............................................................................................. (3)
7. OTHER ENGINE DRIVEN AUXILIARIES
7.1. Auxiliaries necessary for an operation of the engine on test bench, other than the fan
State characteristics, or make(s) and type(s)............................................................. (3)
7.1.1. Generator/Alternator: Yes/No ............................................................................. (4)
7.1.2. Other ....................................................................................................................... (3)

ANNEX 2
(Maximum format: A4 (210 x 297 mm))
Communication concerning either:
approval,
refusal of approval,
extension of approval,
withdrawal of approval,
production definitely
discontinued
of a vehicle/engine type with regard to emissions or:
measurement of power of the engine only, pursuant to Regulation No. 24
Approval No. ....................................................
Extension No....................................
1.
Trade name or mark of the vehicle:
.............................................................................................
2.
Trade name or mark of engine: .......................................................................................................
3.
Vehicle type
..................................................................................................................................
4.
Engine type:......................................Engine approval No.
5.
Manufacturer name and address:....................................................................................................
6.
If applicable, name and address of manufacturer representative: .................................................
..........................................................................................................................................................
7.
Vehicle/engine submitted for approval on:
...................................................................................
8.
Technical service responsible for conducting approval tests: ........................................................
..........................................................................................................................................................
9.
Date of report issued by that service: ..............................................................................................
10.
Number of report issued by that service:.........................................................................................
11.
Test results
11.1.
Emissions

Fuel feed: direct injection/indirect injection
Supercharging equipment: Yes/No
14. Approval granted/refused/extended/withdrawn
15. Reason(s) for extension of approval:...............................................................................................
16. Place: ................................................................................................................................................
17. Date: .................................................................................................................................................
18. Signature: .........................................................................................................................................
19. A list of the documents contained in the approval file transmitted to the administrative service
which has granted approval is Annexed to this communication.

ANNEX 4
TEST AT STEADY SPEEDS OVER THE FULL-LOAD CURVE
1. INTRODUCTION
1.1. This Annex describes the method of determining emissions of visible pollutants at different
steady speeds over the full-load curve.
1.2. The test may be carried out either on an engine or on a vehicle.
2. MEASUREMENT PRINCIPLE
2.1. The opacity of the exhaust gases produced by the engine shall be measured with the engine
running under full-load and at steady speed.
2.2. A sufficient number of measurements will be carried out ranging between the maximum rated
speed and the minimum rated speed. The extreme points of measurement shall be situated
at the limits of interval defined above and one point of measurement will coincide with the
speed at which the engine develops its maximum power and the speed at which it develops
maximum torque.
3. TEST CONDITIONS
3.1. Vehicle or Engine
3.1.1. The engine or the vehicle shall be submitted in good mechanical condition. The engine shall
have been run in.
3.1.2. The engine shall be tested with the equipment prescribed in Annex 1 to this Regulation.
3.1.3. The settings of the engine shall be those prescribed by the manufacturer and shown in
Annex 1 to this Regulation.
3.1.4. In the case of a test on an engine the power of the engine shall be measured in accordance
with Annex 10 to this Regulation, but the tolerances of Paragraph 3.1.5. of this Annex shall
apply. In the case of a test on a vehicle it should be established that the fuel flow is not less
than that declared by the manufacturer.
3.1.5. The power of the engine measured at the test bench during the test at steady speeds of the
fullload curve may differ from the power specified by the manufacturer as follows:
Maximum power
± 2%
at the other
+ 6%
measurement points
- 2%
3.1.6. The exhaust device shall not have any orifice through which the gases emitted by the engine
might be diluted. In cases where an engine has several exhaust outlets, these shall be
connected to a single outlet in which the opacity measurement shall be made.
3.1.7. The engine shall be in the normal working condition prescribed by the manufacturer. In
particular, the cooling water and the oil shall each be at the normal temperature prescribed by
the manufacturer.

4.2. Where the value of the nominal flow is not one of those given in that table in Annex 7 to this
Regulation, the limit value applicable shall be obtained by interpolation on the principle of
proportional parts.

The diagram below shows the six possible measuring points of the matrix and the range of
power and speed governed by each point.
% of maximum
rated speed
% of maximum torque at
that speed
1 100 100
2 90 100
3 100 90
4 90 90
5 100 80
6 90 80
Each measuring point governs the power and speed area to the left of and below that point
and is the measuring point for any engine rated in that area. For example the measuring point
at "A" which is for the 90% full load line and 100% rated speed applies to the rated
power/speed area bounded by ABCD on the diagram.
2.3. If the test is a bench test the engine shall be disconnected from the brake, the latter being
replaced either by the rotating parts driven when no gear is engaged or by an inertia
substantially equivalent to that of the said parts (See Paragraph 7.3. of Annex 1 to this
Regulation).
2.4. If the test is carried out on a vehicle the gear-change control shall be set in the neutral position
and the drive between engine and gear-box engaged.
2.5. With the engine idling, the accelerator control shall be operated quickly, but not violently, so as
to obtain maximum delivery from the injection pump. This position shall be maintained until
maximum engine speed is reached and the governor comes into action. As soon as this
speed is reached the accelerator shall be released until the engine resumes its idling speed
and the opacimeter reverts to the corresponding conditions.

ANNEX 6
SPECIFICATIONS OF REFERENCE FUEL PRESCRIBED FOR APPROVAL
TESTS AND TO VERIFY CONFORMITY OF PRODUCTION
Property Limits and Units ASTM Method
Density at 15°C
min. 0,835 kg/l
D 1298
max. 0,845 kg/l
Cetane index
min. 51
D 976
max. 57
Distillation (2)
D 86
50% Vol. point
min. 245°C
90% Vol. point
min. 320°C
max. 340
Final boiling point
max. 370°C
Viscosity at 40°C
min. 2,5 mm /s
D 445
max. 3,5 mm /s
Sulphur content
min. 0,20% mass
D 1266, D 2622,
max. 0,50
or D 2785
Flash point min. 55°C D 93
Cold filter plugging point
max. -5°C
CEN Draft Pr EN116
or IP309
Conradsor carbon residue
max. 0,20% mass
D 189
on 10% dist. residue
Ash content max. 0,01% mass D 482
Water content max. 0,05% mass D 95 or D 1744
Copper corrosion 100°C max. 1 D 130
Neutralisation (Strong acid) number max. 0,20 mg KOH/g D 974

ANNEX 7
LIMIT VALUES APPLICABLE IN THE TEST AT STEADY SPEEDS
Nominal flow G
Litres/seconds
42
45
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120
125
130
135
140
145
150
155
160
165
170
175
180
185
190
195
200
Absorption coefficient K
m
m
2,26
2,19
2,08
1,985
1,90
1,84
1,775
1,72
1,665
1,62
1,575
1,535
1,495
1,465
1,425
1,395
1,37
1,345
1,32
1,30
1,27
1,25
1,225
1,205
1,19
1,17
1,155
1,14
1,125
1,11
1,095
1,08
1,065
Note: Although the above values are rounded to the nearest 0,01 or 0,005, this does not mean that the
measurements need to be made to this degree of accuracy.

3.4.2. The construction of the electrical circuit, including the indicating dial, shall be such that the
current output from the photoelectric cell is a linear function of the intensity of the light
received over the operating-temperature range of the photoelectric cell.
3.5. Measuring Scales
3.5.1. The light-absorption coefficient k shall be calculated by the formula Ø = O . -KL, where L is
the effective length of the light path through the gas to be measured, Ø the incident flux and
Ø the emergent flux. When the effective length L of a type of opacimeter cannot be assessed
directly from its geometry, the effective length L shall be determined
– Either by the method described in Paragraph 4 of this annex;
or
– Through correlation with another type of opacimeter for which the effective length is
known.
3.5.2. The relationship between the 0-100 linear scale and the light-absorption coefficient k is given
by the formula
1 ⎡ N ⎤
k = − Log ⎢1

L

⎣ 100 ⎦
where N is a reading on the linear scale and k the corresponding value of the absorption
coefficient.
3.5.3. The indicating dial of the opacimeter shall enable an absorption coefficient of 1,7 m to be
read with an accuracy of 0,025 m .
3.6. Adjustment and Calibration of the Measuring Apparatus
3.6.1. The electrical circuit of the photoelectric cell and of the indicating dial shall be adjustable so
that the pointer can be reset at zero when the light flux passes through the smoke chamber
filled with clean air or through a chamber having identical characteristics.
3.6.2. With the lamp switched off and the electrical measuring circuit open or short-circuited, the
reading on the absorption-coefficient scale shall be ∞, and it shall remain at ∞ with the
measuring circuit reconnected.
3.6.3. An intermediate check shall be carried out by placing in the smoke chamber a screen
representing a gas whose known light-absorption coefficient k, measured as described in
Paragraph 3.5.1 is between 1,6 m and 1,8 m . The value of k must be known to within
0,025 m . The check consists in verifying that this value does not differ by more than
0,05 m from that read on the opacimeter indicating dial when the screen is introduced
between the source of light and the photoelectric cell.
3.7. Opacimeter Response
3.7.1. The response time of the electrical measuring circuit, being the time necessary for the
indicating dial to reach 90% of full-scale deflection on insertion of a screen fully obscuring the
photoelectric cell, shall be 0,9 to 1,1 second.

4.2. Method of Assessment of L
4.2.1. The test gas shall be exhaust gas of constant opacity or a light-absorptive gas of a gravimetric
density similar to that of exhaust gas.
4.2.2. A column of length L of the opacimeter, which can be filled uniformly with the test gas, and
the ends of which are substantially at right angles to the light path, shall be accurately
determined. This length L shall be close to the effective length of the opacimeter.
4.2.3. The mean temperature of the test gas in the smoke chamber shall be measured.
4.2.4. If necessary, an expansion tank of sufficient capacity to damp the pulsations and of compact
design may be incorporated in the sampling line as near to the probe as possible. A cooler
may also be fitted. The addition of the expansion tank and of the cooler should not unduly
disturb the composition of the exhaust gas.
4.2.5. The test for determining the effective length shall consist in passing a sample of test gas
alternately through the opacimeter operating normally and through the same apparatus
modified as indicated in Paragraph 4.1.2..
4.2.5.1. The opacimeter readings shall be recorded continuously during the test with a recorder whose
response time is equal to or shorter than that of the opacimeter.
4.2.5.2. With the opacimeter operating normally, the reading on the linear scale of opacity is N and
that of the mean gas temperature expressed in Kelvin degrees is T.
4.2.5.3. With the known length L filled with the same test gas, the reading on the linear scale of
opacity is N and that of the mean gas temperature expressed in Kelvin degrees is T .
4.2.6. The effective length will be
L = L
log
T
T
o log
1 −
1 −
N
100
N
100
4.2.7. The test shall be repeated with at least four test gases giving readings evenly spaced between
the readings 20 and 80 on the linear scale.
4.2.8. The effective length L of the opacimeter will be the arithmetic average of the effective lengths
obtained as stated in Paragraph 4.2.6. for each of the gases.

2.2. Installation for Tests Under Free Acceleration
2.2.1. The ratio of the cross-sectional area of the probe to that of the exhaust pipe shall not be less
than 0,05. The back pressure measured in the exhaust pipe at the opening of the probe shall
not exceed 75 mm (water gauge).
2.2.2. The probe shall be a tube with an open end facing forwards in the axis of the exhaust pipe, or
of the extension pipe if one is required. It shall be situated in a section where the distribution
of smoke is approximately uniform. The achieve this, the probe shall be placed as far
downstream in the exhaust pipe as possible or, if necessary, in an extension pipe so that, if
D is the diameter of the exhaust pipe at the opening, the end of the probe is situated in a
straight portion at least 6 D in length upstream of the sampling point and 3 D in length
downstream. If an extension pipe is used, no air shall be allowed to enter the joint.
2.2.3. The sampling system shall be such that at all engine speeds the pressure of the sample at the
opacimeter is within the limits specified in Annex 8, Paragraph 3.8.2. This may be checked by
noting the sample pressure at engine idling and maximum no-load speeds. Depending on the
characteristics of the opacimeter, control of sample pressure can be achieved by a fixed
restriction or butterfly valve in the exhaust pipe or extension pipe. Whichever method is used,
the back pressure measured in the exhaust pipe at the opening of the probe shall not exceed
75 mm (water gauge).
2.2.4. The pipes connecting with the opacimeter shall also be as short as possible. The pipe shall
be inclined upwards from the sampling point to the opacimeter, and sharp bends where soot
might accumulate shall be avoided. A by-pass valve may be provided upstream of the
opacimeter to isolate it from the exhaust-gas flow when no measurement is being made.
3. FULL-FLOW OPACIMETER
The only general precautions to be observed in steady-speed and free-acceleration tests are
the following:
3.1. Joints in the connecting pipes between the exhaust pipe and the opacimeter shall not allow air
to enter from outside.
3.2. The pipes connecting with the opacimeter shall be as short as possible, as prescribed in the
case of sampling opacimeters. The pipe system shall be inclined upwards from the exhaust
pipe to the opacimeter, and sharp bends where soot might accumulate shall be avoided. A
by-pass valve may be provided upstream of the opacimeter to isolate it from the exhaust-gas
flow when no measurement is being made.
3.3. A cooling system may also be required upstream of the opacimeter.

4.4. Fuel Temperature
± 2 K.
4.5. Air Temperature
± 2 K.
4.6. Barometric Pressure
± 100 Pa.
4.7. Pressure to Intake Duct (see note 1a to Table 1)
± 50 Pa.
4.8. Pressure in Exhaust Duct (see note 1b to Table 1)
± 200 Pa.
5. TEST FOR MEASURING NET ENGINE POWER
5.1. Auxiliaries
5.1.1. Auxiliaries to be fitted
During the test, the auxiliaries necessary for the engine operation in the intended application
(as listed in Table 1) shall be installed on the test bench as far as possible in the same
position as in the intended application.
5.1.2 Auxiliaries to be removed
Certain vehicle accessories necessary only for the operation of the vehicle and which may be
mounted on the engine shall be removed for the test. The following non-exhaustive list is
given as a sample.
– Air compressor for brakes;
– Power steering compressor;
– Suspension compressor;
– Air-conditioning system.
Where accessories cannot be removed, the power they absorb in the unloaded condition may
be determined and added to the measured engine power.

No. Auxiliaries Fitted for net power test
7
Light cooling equipment
Engine bonnet
)
Bonnet air outlet
)
Radiator
)
Fan
)
Fan cowl
)
Water pump
)
Thermostat
)
No
Yes,
standard production equipment
8
Air cooling
Cowl
)
Blower
)
Yes, standard production equipment
Notes
Temperature regulating device )
Yes, standard production equipment
9 Electrical equipment Yes, standard production equipment
10
Supercharging equipment (if fitted)
Compressor driven either directly
)
by the engine, and/or by the
)
exhaust gases
)
Charge air cooler
)
Coolant pump or fan (engine driven)
)
Coolant flow control devices) (if fitted)
)
11 Auxiliary test bench fan Yes, if necessary
Yes, standard production equipment
12 Anti-pollutant devices Yes, standard production equipment
(1a)
The complete intake system shall be fitted as provided for the intended application:
Where there is a risk of an appreciable effect on the engine power;
In the case of two-stroke and positive-ignition engines;
When the manufacturer requests that this should be done.
In other cases, an equivalent system may be used and a check should be made to ascertain
that the intake pressure does not differ by more than 100 Pa from the limit specified by the
manufacturer for a clean air filter.

(9) Charge air-cooled engines shall be tested with charge air cooling, whether liquid or air-cooled,
but if the engine manufacturer prefers, a test bench system may replace the air cooled
cooler. In either case, the measurement of power at each speed shall be made with the same
pressure drop and temperature drop of the engine air across the charge air cooler on the test
bench system as those specified by the manufacturer for the system on the complete vehicle.
(10) They may include, for example, EGR system, catalytic convertor, thermal reactor,
secondary air supply system and fuel evaporation protecting system.
5.1.3. Compression ignition engine starting auxiliaries
For the auxiliaries used in starting compression ignition engines, the two following cases shall
be considered:
(a)
(b)
Electrical starting. The generator is fitted and supplies, where necessary, the auxiliaries
indispensable to the operation of the engine;
Starting other than electrical. If there are any electrically operated accessories
indispensable to the operation of the engine, the generator is fitted to supply these
accessories. Otherwise, it is removed.
In either case, the system for producing and accumulating the energy necessary for starting is
fitted and operates in the unloaded condition.
5.2. Setting Conditions
The setting conditions for the test to determine the net power are indicated in Table 2.
Table 2
Setting conditions
1 Setting of carburettor(s)
2 Setting of injection pump delivery system
3 Ignition or injection timing (timing curve)
4 Governor setting
5 Anti-pollution devices
In accordance with the manufacturer's
production specifications and used
without further alteration for the
particular application
5.3. Test Conditions
5.3.1. The net power test shall consist of a run at full throttle for positive-ignition engines and at fixed
full-load fuel injection pump setting for diesel engines, the engine being equipped as specified
in Table 1.

5.4. Test Procedure
Measurements shall be taken at a sufficient number of engine speeds to define correctly the
power curve between the lowest and the highest engine speeds recommended by the
manufacturer. This range of speeds must include the speed of revolution at which the engine
produces its maximum power. The average of at least two stabilised measurements is to be
determined.
5.5. Data to be Recorded
Data to be recorded are those indicated in the Appendix to this Annex.
6. POWER CORRECTION FACTORS
6.1 Definition
The power correction factor is the coefficient α by which the measured power must be
multiplied to determine the engine power under the reference atmospheric conditions specified
in Paragraph 6.2.
P = ∝.P
where:
P
is the corrected power (i.e. power under reference atmospheric conditions);
∝ is the correction factor (∝ or ∝ );
P
is the measured power (test power).
6.2. Reference Atmospheric Conditions
6.2.1. Temperature (T ): 298 K (25°C)
6.2.2. Dry pressure (P ): 99 kPa.
Note: The dry pressure is based on a total pressure of 100 kPa and a water vapour pressure
of 1 kPa.
6.3. Test Atmospheric Conditions
The atmospheric conditions during the test shall be the following:
6.3.1. Temperature (T)
For positive-ignition engines
288 K ≤ T ≤ 308 K
For diesel engines 283 K ≤ T ≤ 313 K
6.3.2. Pressure (P )
80 kPa ≤ P ≤ 110 kPa.

6.4.2.1.1 Naturally aspirated and mechanically supercharged engines.
f
⎡99
⎤ ⎡ T ⎤
= ⎢ ⎥ •
P

298

⎣ ⎦ ⎣ ⎦
6.4.2.1.2 Turbocharged engines with or without cooling of inlet air
f
⎡99⎤
= ⎢ ⎥
⎣P

⎡ T ⎤
• ⎢
298

⎣ ⎦
6.4.2.2 Engine Factor f
f
is a function of q (fuel flow corrected) as follows:
f = 0,036 q - 1,14
where
q = q/r
where
"q" is the fuel flow in milligram per cycle per litre of total swept volume (mg/( l. cycle)).
"r" is the pressure ratio of compressor outlet and compressor inlet (r = 1 for naturally aspirated
engines).
This formula is valid for a value interval of q included between 40 mg/( l. cycle) and
65 mg/(l.cycle).
For q values lower than 40 mg/(l. cycle), a constant value of f equal to 0,3 (f = 0,3) will be
taken.
For q values higher than 65 mg/(l. cycle), a constant value of f equal to 1,2 (f = 1,2) will be
taken (see the figure below):

ANNEX 10 - APPENDIX
STATEMENT OF THE RESULTS OF TESTS FOR MEASURING NET ENGINE POWER
This information is to be supplied by the manufacturer simultaneously with the identification sheet
constituting Annex 1 to the Regulation. If the test under this Regulation is a bench test of the engine, this
form shall be completed by the laboratory performing the test.
1. TEST CONDITIONS
1.1. Pressures measured at maximum power
1.1.1. Total barometric pressure ................................Pa
1.1.2. Water vapour pressure.....................................Pa
1.1.3. Exhaust pressure .............................................Pa
1.2. Temperatures Measured at Maximum Power
1.2.1. of the intake air .................................................K
1.2.2. at the outlet of the engine intercooler ..............................................................................................K
1.2.3. of the cooling fluid:
1.2.3.1. at the engine cooling fluid outlet ......................................................................................................K
1.2.3.2. at the reference point in the case of air cooling ..............................................................................K
1.2.4. of the lubricating oil................................ K (indicate point of measurement)
1.2.5. of the fuel
1.2.5.1. of the fuel pump inlet ........................................................................................................................K
1.2.5.2. in the fuel-consumption measuring device......................................................................................K
1.3. Characteristics of the Dynamometer:
1.3.1. Make: ................................................ Model: .................................................................
1.3.2. Type: .................................................
2. FUEL
2.1. For Positive-Ignition Engines Operating on Liquid Fuel
2.1.1. Make: ................................................................
2.1.2. Specification: ....................................................

4. DETAILED RESULTS OF MEASUREMENTS
4.1. Statements of Results of Net Power Measurement Test
Engine speed, min
Measured torque, Nm
Measured power, kW
Measured fuel flow, g/kWh
Measured smoke index, m
Barometric pressure, kPa
Water vapour pressure, kPa
Inlet air temperature, K
Power to be added for auxiliaries in excess of Table 1, kW
Power correction factor
Corrected brake power, kW (with/without ( fan)
Power of fan, kW (to be subtracted if fan not fitted)
Net power, kW
Net torque, Nm
Corrected specific fuel consumption g/kWh
Smoke index m
Cooling liquid temperature at outlet, K
Lubricating oil temperature at measuring point, K
Air temperature after supercharger, K
Fuel temperature at injection pump inlet, K
Air temperature after charge air cooler, K
Pressure after supercharger, kPa
No. 1
No. 2
No. 3
Pressure after charge air cooler, kPa
4.2
Maximum net power:
kW at....................................................................... min
4.3
Maximum net torque: .......................Nm at .............................................................................min
5.
Engine submitted for testing on: ......................................................................................................
6.
Technical service conducting tests:.................................................................................................
Compression Ignition Engines - Emission of Visible Pollutants - Power Measurement.