Regulation No. 59-02

Name:Regulation No. 59-02
Description:Replacement Silencing Systems.
Official Title:Uniform Provisions Concerning the Approval of: Replacement Silencing Systems.
Country:ECE - United Nations
Date of Issue:2015-11-09
Amendment Level:02 Series, Supplement 1
Number of Pages:24
Vehicle Types:Car, Component, Light Truck
Subject Categories:Noise
Available on InterRegs.NET

Our online subscription service, offering immediate access to our extensive library of global vehicle regulations, standards and legislation. A fully searchable, accurate, user-friendly resource for consolidated regulations that are updated quickly and frequently.

Tell me more | Already a subscriber

Available on SelectRegs.com

Our fast and easy means of purchasing up-to-date global vehicle and component standards and regulations on a pay-as-you-go basis. Pay securely by credit card and your documents are delivered directly and immediately to your computer as PDF files.

Tell me more | Go straight to site

Keywords:

silencing, exhaust, system, approval, regulation, type, paragraph, vehicle, components, replacement, test, engine, number, annex, amendments, production, series, conformity, systems, manufacturer, rated, component, thereof, maximum, requirements, sound, tests, speed, fitted, means, original, date, intended, technical, part, power, pressure, force, information, conditions, vehicles, net, type-approval, entry, granted, authority, mark, approved, mounted, results

Text Extract:

All InterRegs documents are formatted as PDF files and contain the full text, tables, diagrams and illustrations of the original as issued by the national government authority. We do not re-word, summarise, cut or interpret the regulatory documents. They are consolidated, published in English, and updated on a regular basis. The following text extract indicates the scope of the document, but does not represent the actual PDF content.

E/ECE/324
) Rev.1/Add.58/Rev.2/Amend.1
E/ECE/TRANS/505 )
February 5, 2016
STATUS OF UNITED NATIONS REGULATION
ECE 59-02
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
REPLACEMENT SILENCING SYSTEMS
Incorporating:
Supplement 1 to the 00 series of amendments
Date of Entry into Force: 28.01.90
Supplement 2 to the 00 series of amendments
Date of Entry into Force: 25.12.94
Supplement 3 to the 00 series of amendments
Date of Entry into Force: 10.10.06
01 series of amendments
Date of Entry into Force: 13.04.12
02 series of amendments
Date of Entry into Force: 08.10.15
Supplement 1 to the 02 series of amendments
Date of Entry into Force: 20.01.16

REGULATION NO. 59-02
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF
REPLACEMENT SILENCING SYSTEMS
CONTENTS
REGULATION
1. Scope
2. Definitions
3. Application for Approval
4. Markings
5. Approval
6. Specifications
7. Extension of Approval
8. Modification of the Type of Exhaust Silencing System
9. Conformity of Production
10. Information Intended for Users and Technical Inspection
11. Penalties for Non-conformity of Production
12. Production Definitively Discontinued
13. Names and Addresses of Technical Services Responsible for Conducting Approval Tests,
and of Type Approval Authorities
ANNEXES
Annex 1 −
Communication
Appendix

Information document No. … relating to type approval of exhaust
replacement silencing systems or exhaust silencing components for
motor vehicles (Regulation No. 59)
Annex 2
Annex 3
Annex 4
Annex 5
Annex 6
− Arrangements of Approval Marks
− Test Apparatus
− Measuring Points - Back Pressure.
− Checks on Conformity of Production
– Information intended for users and technical inspection

2.6. "Exhaust replacement silencing system or components of said system" means any
part of the exhaust silencing system defined in Paragraph 2.2. above intended for use on a
vehicle, other than a part of the type fitted to this vehicle when submitted for type approval
pursuant to this Regulation;
2.7. "Design family of exhaust replacement silencing systems or replacement systems
components" means exhaust silencing systems or components thereof belonging to the
same design family if all of the characteristics according to paragraph 6.4.1. are the same;
2.8. "Approval of an exhaust replacement silencing system or components of said
exhaust system" means the approval of the whole or part of an exhaust silencing system
adaptable to one or several specified types of motor vehicles, as regards the limitation of
their noise level;
2.9. "Vehicle type" means a category of motor vehicles which does not differ in such essential
respects as:
2.9.1. The type of engine (positive or compression ignition, two- or four-stroke, reciprocating or
rotary piston), number and capacity of cylinders, number and type of carburettors or
injection system, arrangement of valves or the type of electric motor;
2.9.2. "Rated maximum net power" P means the engine power expressed in kW and measured
by the method pursuant to Regulation No. 85. However, if the rated maximum net power
and the corresponding rated engine speed differs only due to different engine mappings,
these vehicles may be regarded as from the same type;
2.9.3. The silencing system.
3. APPLICATION FOR APPROVAL
3.1. The application for approval of an exhaust replacement silencing system or components of
said system shall be submitted by its manufacturer or by his duly accredited representative.
3.2. It shall be accompanied by the under mentioned documents in triplicate and the following
particulars:
3.2.1. A description of the vehicle type(s) on which the exhaust system or components is intended
to be mounted, with regard to the items mentioned in Paragraph 2.7. above. The numbers
and/or symbols identifying the engine type and the vehicle type shall be specified and the
vehicle type approval number, if necessary;
3.2.2. A description of the assembled exhaust silencing system showing the relative position of
each of its components, as well as mounting instructions;
3.2.3. Detailed drawings of each exhaust silencing component to enable it to be easily located and
identified, and a specification of the material used.
3.2.4. An information document according to the appendix of Annex 1.

5. APPROVAL
5.1. If the type of exhaust replacement silencing system submitted for approval pursuant to this
Regulation meets the requirement of Paragraph 6. below, approval for that type shall be
granted.
5.2. An approval number shall be assigned to each type approved. Its first two digits (at present
02 corresponding to the 02 series of amendments to the Regulation) 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 may not
assign the same number to another type of replacement silencing system or component
designed for the same type(s) of vehicle.
5.3. Notice of approval or of refusal of approval of an exhaust replacement silencing system or
components of said system pursuant to this Regulation shall be communicated to the
Parties to the Agreement which apply this Regulation, by means of a form conforming to the
model in Annex 1 to the Regulation, and of drawings of the exhaust silencing system or
components supplied by the applicant for approval, in a format not exceeding A4
(210 × 297mm) or folded to that format and on an appropriate scale.
5.4. There shall be affixed to every component of exhaust silencing system conforming to a 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
had 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 approval number shall be mentioned in the approval form, as well as the method used
for approval tests.
5.5. The approval mark shall be easily legible and indelible, when the exhaust silencing system
is mounted on the vehicle.
5.6. A component may be marked with more than one approval number if it has been approved
as a part of more than one exhaust replacement silencing system; in this case the circle
need not be repeated. Annex 2 to this Regulation gives an example of the arrangement of
the approval mark.

6.2.2. The sound reduction performance of the exhaust replacement silencing system or
components of said system shall be verified by means of the methods described in
Paragraphs 6.2.1., 6.2.2. and 6.2.3. of Regulation No. 51. In particular, for the application of
this point, reference shall be made to the amendment level of Regulation No. 51 which was
in force at the time of type approval of the new vehicle.
(a)
Measurement with running vehicle
When the exhaust replacement silencing system or components thereof is mounted
on the vehicle described in Paragraph 3.3.3. above, the sound levels obtained shall
satisfy one of the following conditions:
(i)
(ii)
The value measured (rounded to the nearest integer) shall not exceed by more
than 1dB(A) the type approval value obtained under Regulation No. 51 with the
type of vehicle concerned.
The value measured (before any rounding to the nearest integer) shall not
exceed by more than 1 dB(A) the sound value measured (before any rounding
to the nearest integer) on the vehicle referred to in Paragraph 3.3.3. above,
when this is fitted with an exhaust silencing system corresponding to the type
fitted to the vehicle when submitted for type approval under Regulation No. 51.
Where back-to-back comparison of the exhaust replacement system with the
original system is chosen, for the application of Paragraph 3.1.2.1.4.2. and/or
Paragraph 3.1.2.2.1.2. of Annex 3 of Regulation No. 51, it is allowed to have a
gear change to higher accelerations and the use of electronic or mechanical
devices to prevent this downshift is not mandatory. If under these conditions
the noise level of the test vehicle becomes higher than the conformity of
production (COP) values, the Technical Service will decide on the
representativeness of the test vehicle.
(b)
Measurement with stationary vehicle
When the exhaust replacement silencing system or components thereof is mounted
on the vehicle described in Paragraph 3.3.3. above, the sound levels obtained shall
satisfy one of the following conditions:
(i)
(ii)
The value measured (rounded to the nearest integer) shall not exceed by more
than 2dB(A) the type approval value obtained under Regulation No. 51 with the
type of vehicle concerned.
The value measured (before any rounding to the nearest integer) shall not
exceed by more than 2dB(A) the noise value measured (before any rounding to
the nearest integer) on the vehicle referred to in Paragraph 3.3.3. above, when
this is fitted with a silencing system corresponding to the type fitted to the
vehicle when submitted for type approval under Regulation No. 51.
6.2.3. Further to the requirements of Annex 3 of the 03 series of amendments of Regulation
No. 51, any exhaust replacement silencing system, or components thereof, shall fulfil the
applicable specifications of Annex 7 of the 03 series of amendments of Regulation No. 51.
For exhaust replacement silencing systems intended for vehicles type approved under the
former series of the UN Regulation No. 51 the requirements of Annex 7 of the 03 series of
amendments of Regulation No. 51 as well as the specifications of Paragraphs 6.2.3.1. to
6.2.3.2. below do not apply.

6.3.4.2. Test method with vehicle
The measurements shall be carried out on the vehicle referred to in Paragraph 3.3.3. above.
The test shall be conducted either on the road or on a roller dynamometer.
With the throttle completely open, the engine shall be loaded so as to obtain the rated
engine speed (S) corresponding to the rated maximum net power of the engine.
For the measurement of back pressure, the distance at which the pressure tap shall be
placed from the exhaust manifold is indicated in Annex 4 to this Regulation.
6.4. Additional Specifications Regarding Replacement Silencing Systems or Components
Containing Acoustically Absorbing Fibrous Materials
6.4.1. General
Sound absorbing fibrous materials may be used in exhaust silencing systems or
components thereof only if:
(a)
(b)
The exhaust gas is not in contact with the fibrous materials; or if
The exhaust silencing system or the components thereof are of the same design
family as systems or components for which it has been proven, in the course of the
type approval process in accordance with the requirements of this Regulation, that
they are not subject to deterioration.
Unless one of these conditions is fulfilled, the complete exhaust silencing system or
component thereof shall be submitted to conventional conditioning using one of the three
installations and procedures described below.
For the purposes of (b) above, a family of exhaust silencing system or exhaust silencing
system components thereof shall be considered as being of the same design family when 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.
6.4.1.1. Continuous road operation for 10,000km

6.4.1.3.2. The test apparatus, a detailed diagram of which is shown in Figure 3 of the appendix to
Annex 5 to Regulation No. 51 shall be fitted at the outlet of the exhaust silencing system.
Any other apparatus providing equivalent results is acceptable.
6.4.1.3.3. The test apparatus shall be adjusted in such a way that the exhaust gas flow is alternately
interrupted and re-established by the quick action valve for 2,500 cycles.
6.4.1.3.4. The valve shall open when the exhaust gas back pressure, measured at least 100mm
downstream of the intake flange, reaches a value of between 35 and 40kPa. It shall close
when this pressure does not differ by more than 10% from its stabilized value with the valve
opened.
6.4.1.3.5 The time-delay switch shall be set for the duration of gas exhaust resulting from the
provisions laid down in Paragraph 6.4.1.3.4. above.
6.4.1.3.6. Engine speed shall be 75% of the speed (S) at which the engine develops its rated
maximum net power.
6.4.1.3.7. The power indicated by the dynamometer shall be 50% of the full-throttle rated maximum
net power measured at 75% of rated engine speed (S).
6.4.1.3.8. Any drain holes shall be closed off during the test.
6.4.1.3.9. The entire test shall be completed within 48h. If necessary, one cooling period will be
observed after each hour.
6.4.1.3.10. After conditioning, the noise level is checked pursuant to Paragraph 6.2. above.
7. EXTENSION OF APPROVAL
The exhaust silencing system manufacturer or his duly accredited representative may ask
the Type Approval Authority which has granted the approval of the exhaust silencing system
for one or several types of vehicles, for an extension of the approval to other types of
vehicles.
The procedure is that described in Paragraph 3. above. Notice of the extension of approval
(or refusal of extension) shall be communicated to the Parties to the Agreement which apply
this Regulation in accordance with the procedure specified in Paragraph 5.3. above.
8. MODIFICATION OF THE TYPE OF EXHAUST SILENCING SYSTEM
8.1. Every modification of the type of exhaust replacement silencing system shall be notified to
the Type Approval Authority which approved the type of exhaust silencing system. The said
Authority may then either:
8.1.1. Consider that the modifications made are unlikely to have an appreciable adverse effect, or
8.1.2. Require a further test report from the Technical Service responsible for conducting the tests.
8.2. 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.

10. INFORMATION INTENDED FOR USERS AND TECHNICAL INSPECTION
Each replacement silencing system shall be accompanied by a paper document issued by
the manufacturer of the replacement silencing system or their representative. That paper
document shall at least bear the information according to Annex 6.
11. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
11.1. The approval granted in respect of a type of exhaust silencing system pursuant to this
Regulation may be withdrawn if the requirements laid down in Paragraph 9. above are not
complied with, or if the exhaust silencing system or components fail to pass the tests
provided for in Paragraph 9.2. above.
11.2. 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 applying 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".
12. PRODUCTION DEFINITIVELY DISCONTINUED
If the holder of the approval completely ceases to manufacture a type of exhaust
replacement silencing system or components of the said system in accordance with this
Regulation, he shall so inform the Type Approval 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".
13. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR
CONDUCTING APPROVAL TESTS, AND OF TYPE APPROVAL AUTHORITIES
The Contracting Parties to the 1958 Agreement applying 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 Type Approval Authorities 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.

13. Gears used: ...............................................................................................................................
14. Final drive ratio(s): ....................................................................................................................
15. Rated maximum net power: ......................................................................................................
16. Load conditions of vehicle during test: ......................................................................................
17. Sound levels:
17.1. Vehicle in motion: ............................................................................................................ dB(A)
17.2. Vehicle stationary: ....................... dB(A) with engine running at ...................................... min
18. Value of the back pressure: ......................................................................................................
19. Exhaust silencing system submitted:
For approval on: ........................................................................................................................
For extension of approval on: ...................................................................................................
20. Technical Service responsible for conducting approval tests: ..................................................
21. Date of report issued by that service: .......................................................................................
22. Number of report issued by that service: ..................................................................................
23. Approval granted/refused : ......................................................................................................
25. Place: ........................................................................................................................................
26. Date: ..........................................................................................................................................
27. Signature: ..................................................................................................................................
28. The following documents, bearing the approval number shown above, are annexed to this
communication:
Drawings, diagrams and plans of the exhaust silencing system;
Photographs of the exhaust silencing system;
List of components, duly identified constituting the exhaust silencing system.

1.6.2. Manufacturer's engine code:
1.6.3. Rated maximum net power (g): ................................. kW at .............................................. min
or maximum continuous rated power (electric motor): .......................................................... kW
1.6.4. Pressure charger(s): original part or make and marking:
1.6.5. Air filter: original part or make and marking :
1.6.6. Intake silencer(s): original part or make and marking:
1.6.7. Exhaust silencer(s): original part or make and marking:
1.6.8. Catalyst: original part or make and marking :
1.6.9. Particulate Trap(s): original part or make and marking:
1.7. Transmission
1.7.1. Type (mechanical, hydraulic, electric, etc.):
1.8. Non-engine devices designed to reduce noise: original part or description: 4
1.9. Sound-level values:
moving vehicle: ............................................................................................................... dB(A),
stationary vehicle dB(A), at ............................................................................................... min
1.10. Value of the back pressure: .................................................................................................. Pa
1.11. Any restrictions in respect of use and mounting requirements:
2. Remarks
3. Description of the device
3.1. A description of the replacement silencing system indicating the relative position of each
system component, together with mounting instructions
3.2. Detailed drawings of each component, so that they can be easily located and identified, and
reference to the materials used. These drawings shall indicate the place provided for the
compulsory affixing of the type approval mark
Date:
Signed:
Position in company:

ANNEX 3
TEST APPARATUS
1. Inlet flange or sleeve – connection to the rear of complete silencing system to be
tested.
2. Regulation valve (hand operated).
3. Compensating reservoir from 35 to 40 l.
4. Pressure switch 5kPa to 250kPa – to open Item 7.
5. Time delay switch – to close Item 7.
6. Counter of impulses.
7. Quick response valve – such as the valve of an exhaust brake system of 60mm in
diameter, operated by a pneumatic cylinder with an output of 120N at 400kPa. The
response time, both when opening and closing, must not exceed 0.5s.
8. Exhaust gas evacuation.
9. Flexible pipe.
10. Pressure gauge.

ANNEX 5
CHECKS ON CONFORMITY OF PRODUCTION
1. GENERAL
These requirements are consistent with tests to be held to check conformity of production
(COP), according to Paragraphs 9.3.5. and 9.4.3. of this Regulation.
2. TESTING AND PROCEDURES
The methods of testing, measuring instruments and interpretation of results shall be those
described in Paragraph 6. of this Regulation. The exhaust system or exhaust silencing
component under test shall be subjected to the test as described in Paragraphs 6.2., 6.3.
and 6.4. of this Regulation.
3. SAMPLING AND EVALUATION OF THE RESULTS
One exhaust silencing system or exhaust silencing component has to be chosen and
subjected to the tests of paragraph 2. above. If the test results fulfil the conformity of
production requirements of paragraph 9.1. of this Regulation, the type of exhaust silencing
system or exhaust silencing component is considered to be in compliance with COP.
If one of the test results does not fulfil the conformity of production requirements of
Paragraph 9.1. of this Regulation, two more exhaust silencing systems or exhaust silencing
components of the same type shall be tested pursuant to Paragraph 2. above.
If the test results for the second and the third exhaust silencing system or component fulfil
the conformity of production requirements of Paragraph 9.1. of this Regulation, the type of
exhaust silencing system or exhaust silencing component is considered in compliance with
the conformity of production.
If one of the test results of the second or third exhaust silencing system or exhaust silencing
component does not fulfil the conformity of production requirements of Paragraph 9.1. of this
Regulation, the type of exhaust silencing system or exhaust silencing component 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.

Replacement Silencing Systems.