Regulation No. 92-01 Proposed Supplement 2

Name:Regulation No. 92-01 Proposed Supplement 2
Description:Exhaust Silencer Replacement Systems - Motorcycles. Proposed Supplement 2 to the 01 Series.
Official Title:Proposal for Supplement 2 to the 01 Series of Amendments to Regulation No. 92 (Replacement Exhaust Silencing Systems (RESS) for Motorcycles).
Country:ECE - United Nations
Date of Issue:2016-12-23
Amendment Level:Original
Number of Pages:21
Vehicle Types:Component, Motorcycle
Subject Categories:Drafts and Proposals (Current)
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Keywords:

approval, vehicle, regulation, type, noress, silencing, system, sound, manufacturer, paragraph, requirements, exhaust, components, number, test, engine, replacement, gear, speed, component, series, amendments, granted, level, annex, approved, accordance, thereof, representative, systems, mark, production, extension, means, emission, non-original, tests, maximum, fibrous, power, average, fitted, silencer, model, runs, position, issued, provisions, vehicles, pursuant

Text Extract:

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ECE/TRANS/WP.29/2017/5
PROPOSAL FOR SUPPLEMENT 2 TO THE 01 SERIES OF
AMENDMENTS TO
REGULATION NO. 92
(REPLACEMENT EXHAUST SILENCING SYSTEMS (RESS) FOR
MOTORCYCLES)
ADOPTED AT THE 171 SESSION – MARCH 2017
PROVISIONAL DATE OF ENTRY INTO FORCE: OCTOBER 10, 2017

1. Scope
2. Definitions
This Regulation applies to non-original replacement exhaust silencing systems for vehicles
of categories L , L , L , L and L .
For the purpose of this Regulation
2.1. "Non-original replacement exhaust silencing system or components of this system"
means a system of a type different from that fitted to the vehicle on approval or extension of
approval. It may be used only as a replacement exhaust or silencing system.
The acronym NORESS denotes the non-original replacement exhaust silencing system.
2.2. "Non-original replacement exhaust silencing system component" means one of the
various components which together form the exhaust silencing system;
2.3. "Non-original replacement exhaust silencing systems of different types" means
silencing systems which differ significantly in such respects as:
(a)
(b)
(c)
(d)
Their components bear different trade names or marks,
The characteristics of the materials constituting a component are different or the
components differ in shape or size; a modification in respect to coating (zinc coating,
aluminium coating, etc.) is not considered a change of type,
The operating principles of at least one component are different,
Their components are combined differently;
2.4. "Non-original replacement exhaust silencing system (NORESS) or component
thereof" means any part of the exhaust silencing system defined in Paragraph 2.1.
intended for use on a vehicle other than a part of the type fitted to the vehicle when
submitted for type approval pursuant to Regulation No. 9, Regulation No. 41 or
Regulation No. 63;
2.5. "Approval of a NORESS or component(s) thereof" means the approval of the whole or a
part of a silencing system adaptable to one or several specified types of vehicle, falling
under the scope of this Regulation, as regards the limitation of their sound level;

3.3. At the request of the Technical Service conducting the tests for approval, the manufacturer
of the NORESS shall submit:
(a)
(b)
(c)
Two samples of the NORESS or its components submitted for approval;
A sample of the original exhaust silencing system with which the vehicle was
equipped when submitted for type approval;
A test vehicle representative of the type to which the NORESS is to be fitted; this
vehicle, when measured for sound emission according to the methods described in
Annex 3 (including all relevant amendments) to Regulation No. 9, Regulation No. 41
or Regulation No. 63 shall satisfy the following conditions:
(i)
If the vehicle is of a type for which approval has been issued pursuant to the
requirements of each of Regulations Nos. 9, 41 or 63:
a. The sound level, during the test in motion shall not exceed the limit
specified in the appropriate Regulation by more than 1dB(A);
b. The sound level during the stationary test shall not exceed by more than
3dB(A), the level determined during the approval and indicated on the
manufacturer's plate.
(ii)
If the vehicle is not of the type for which approval has been issued pursuant to
the requirements of the appropriate Regulation, the sound level shall not
exceed by more than 1dB(A) the limit applicable at the time when it was first
put on the road.
4. Markings
4.1. Each component of the NORESS, excluding pipes and fitting accessories, shall bear:
(a)
(b)
The trade name or mark of the manufacturer of the NORESS of its components;
The commercial designation given by the manufacturer.
4.2. These markings shall be clearly legible and indelible and also visible in the position at which
the NORESS is fitted.
4.3. The NORESS shall be labelled by its manufacturer; indicating the type(s) of vehicle(s) for
which it has been granted the approval.
4.4. A component may carry several approval numbers if it has been approved as a component
of several replacement exhaust systems.
4.5. The replacement exhaust system shall be supplied in a packaging or carry a label both
providing the following particulars:
(a)
(b)
(c)
The trade name or mark of the manufacturer of the replacement silencing system and
its components,
The address of the manufacturer or his representative,
A list of vehicle models for which the replacement silencing system is intended.

6. Specifications
6.1. General Specifications
The silencer shall be designed, constructed and capable of being mounted so that:
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
The vehicle complies with the requirements of this Regulation under normal
conditions of use, and in particular regardless of any vibrations to which it may be
subjected;
It displays reasonable resistance to the corrosion phenomena to which it is exposed,
with due regard to the normal conditions of use of the vehicle;
The ground clearance provided by the silencer originally fitted, and the possible
inclined position of the vehicle, are not reduced;
Unduly high temperatures do not exist at the surface;
Its edges are not sharp or jagged and there is sufficient space for shock absorbers
and springs;
Adequate clearance of spring parts is provided;
Adequate safety clearance of pipes is provided;
It is tamper-resistant in a way that is compatible with clearly-defined maintenance and
installation requirements;
6.2. Specifications Regarding Sound Levels
The acoustic efficiency of the NORESS or components thereof shall be verified by means of
the methods described in Regulation Nos. 9, 41 or 63. In particular, for the application of this
Paragraph reference shall be made to the series of amendments to Regulation No. 92 which
was in force at the time of type approval of the new vehicle. When the NORESS or its
components is fitted to the vehicle described in Paragraph 3.3. (c), the sound level values
obtained using the two methods (stationary and vehicle in motion) shall satisfy the following
condition:
They shall not exceed the values measured in conformity with the requirements of
Paragraph 3.3. (c), for the same vehicle when fitted with the original silencing system during
the test with the vehicle in motion and the stationary test.
6.3. Additional Requirements
6.3.1. Tampering Protection Provisions
The NORESS or its components shall be constructed in a way that does not permit removal
of baffles, exit-cones and other parts whose primary function is as part of the
silencing/expansion chambers. Where incorporation of such a part is unavoidable, its
method of attachment shall be such that removal is not facilitated (e.g. with conventional
threaded fixings) and shall also be attached such that removal causes
permanent/irrecoverable damage to the assembly.

6.4.4. Test Method
6.4.4.1. Engine Test Method
The measurements shall be carried out on the engine of the vehicle referred to in
Paragraph 3.3. (c), the engine being mounted on a dynamometer.
6.4.4.2. Vehicle Test Method
The measurements shall be carried out on the vehicle referred to in Paragraph 3.3. (c).
The values obtained with the original silencing system shall be compared with those
obtained with the NORESS. The test shall be conducted on a roller dynamometer.
6.5. Additional Provisions Regarding the NORESS or its Components Filled with Fibrous
Materials
The use of fibrous absorbent material shall be permitted in the construction of the NORESS
only if the requirements in Annex 3 are met.
6.6. Evaluation of the Emission of Pollutants of Vehicles Equipped with Replacement
Silencer System
The vehicle referred to in Paragraph 3.3. (c) with the non-original replacement exhaust
silencing system (NORESS) of the type for which approval is requested, shall fulfil the
pollution requirements according to the type approval of the vehicle. The evidence shall be
documented in the test report.
7. Modification and Extension of the Approval of NORESS and Extension of Approval
7.1. Every modification of the type of NORESS or its components shall be notified to the Type
Approval Authority which approved the type of NORESS. The said Authority may then
either:
(a)
(b)
Consider that the modifications made are unlikely to have an appreciable adverse
effect, or
Require a further test report from the Technical Service responsible for conducting
the tests.
7.2. The manufacturer of the NORESS or component thereof or his duly accredited
representative may ask the Type Approval Authority which has granted the approval of the
NORESS for one or several types of vehicle for an extension of the approval to other types
of vehicle. The procedure shall be as described in Paragraph 3. above.
7.3. Confirmation or refusal of approval, specifying the modifications, shall be communicated in
accordance with the procedure specified in Paragraph 5.3. above to the Contracting Parties
to the Agreement applying this Regulation.
7.4. The competent authority issuing the extension of approval shall assign a series number to
each communication form drawn up for such an extension.

ANNEX 1
PART A. FOR NORESS FOR VEHICLE TYPES APPROVED ACCORDING
TO THE 04 SERIES OF AMENDMENTS TO REGULATION NO. 41
COMMUNICATION
(Maximum format: A4 (210 × 297mm))
Issued by:
Name of administration
.....................................
.....................................
.....................................
concerning:
APPROVAL GRANTED
APPROVAL EXTENDED
APPROVAL REFUSED
APPROVAL WITHDRAWN
PRODUCTION DEFINITELY DISCONTINUED
of a vehicle type with regard to a type of NORESS or component there of pursuant to Regulation No. 92.
Approval No. ................................... Extension No. ...........................................
1. Trade name or mark of the vehicle: ..........................................................................................
2. Vehicle type: ..............................................................................................................................
3. Manufacturer's name and address: ..........................................................................................
4. If applicable, name and address of manufacturer’s representative: .........................................
5. Engine
5.1. Manufacturer: ............................................................................................................................
5.2. Type: .........................................................................................................................................
5.3. Model: .......................................................................................................................................
5.4. Rated maximum net power: ….............................. kW at ................................................ min
5.5. Kind of engine (e.g. positive-ignition, compression ignition, etc.): .........................................
5.6. Cycles: two-stroke/four-stroke

12. Vehicle length: ....................................................................................................................... m
12.1. Reference length l : ............................................................................................................. m
13. Vehicle speeds of measurements in gear (i)
13.1. Vehicle speed at the beginning of the period of acceleration (average of 3 runs) for
gear (i): ............................................................................................................................. km/h
13.2. Pre-acceleration length for gear (i): ...................................................................................... m
13.3. Vehicle speed v (average of three runs) for gear (i): .................................................... km/h
13.4. Vehicle speed v (average of three runs) for gear (i): .................................................... km/h
14. Vehicle speeds of measurements in gear (i+1) (if applicable)
14.1. Vehicle speed at the beginning of the period of acceleration (average of three runs) for
gear (i+1): ......................................................................................................................... km/h
14.2. Pre-acceleration length for gear (i+1): .................................................................................. m
14.3. Vehicle speed v (average of three runs) for gear (i+1): ............................................... km/h
14.4. Vehicle speed v (average of three runs) for gear (i+1): ............................................... km/h
15. Accelerations are calculated between lines AA' and BB'/PP' and BB'
15.1. Description of functionality of devices used to stabilize the acceleration (if
applicable): ................................................................................................................................
16. Sound levels of moving vehicle
16.1. Wide-open-throttle test result L : .................................................................................. dB(A)
16.2. Constant speed test results L : ..................................................................................... dB(A)
16.3. Partial power factor k : .................................................................................................... dB(A)
16.4. Final test result L : ...................................................................................................... dB(A)
17. Sound level of stationary vehicle
17.1. Position and orientation of microphone (according to Appendix 2 of Annex 3 of 04 series of
Regulation No. 41): ...................................................................
17.2. Test result for stationary test: …............................ dB(A) at ............................................ min
18. Additional sound emission provisions:
See manufacturer's statement of compliance (attached)

PART B. FOR NORESS FOR VEHICLE TYPES APPROVED ACCORDING
TO REGULATION NO. 9 OR REGULATION NO. 63
COMMUNICATION
(Maximum format: A4 (210 × 297mm))
Issued by:
Name of administration
.....................................
.....................................
.....................................
concerning:
APPROVAL GRANTED
APPROVAL EXTENDED
APPROVAL REFUSED
APPROVAL WITHDRAWN
PRODUCTION DEFINITELY DISCONTINUED
of a vehicle type with regard to a type of NORESS or component there of pursuant to Regulation No. 92.
Approval No. ................................... Extension No. ...........................................
1. Trade name or mark of the vehicle: ..........................................................................................
2. Vehicle type: ..............................................................................................................................
3. Manufacturer's name and address: ..........................................................................................
4. If applicable, name and address of manufacturer’s representative: .........................................
5. Engine
5.1. Manufacturer: ............................................................................................................................
5.2. Type: .........................................................................................................................................
5.3. Model: .......................................................................................................................................
5.4. Rated maximum net power: ....................................... kW at .......................................... min
5.5. Kind of engine (e.g. positive-ignition, compression ignition, etc.): .........................................

12. Vehicle length: ....................................................................................................................... m
13. Sound level of the vehicle in motion: .............................................................................. dB(A)
13.1. Gear (i) for the test of the vehicle in motion: .............................................................................
13.2. Vehicle speed at the beginning of the period of acceleration (average of three runs) for
gear (i): ............................................................................................................................. km/h
14. Sound level of the stationary vehicle: ............................................................................. dB(A)
14.1. at engine speed: ............................................................................................................... min
14.2. Position and orientation of microphone: ...................................................................................
15. In-use compliance reference data
15.1. Gear (i) or, for vehicles tested with non-locked gear ratios, the position of the gear selector
chosen for the test: ....................................................................................................................
15.2. Vehicle speed at the beginning of the period of acceleration (average of three runs) for
gear (i): ............................................................................................................................. km/h
15.3. Sound pressure level L : ................................................................................................ dB(A)
16. Date of submission of vehicle for approval: ..............................................................................
17. Technical Service performing the approval tests: .....................................................................
18. Date of report issued by that Service: .......................................................................................
19. Number of report issued by that Service: .................................................................................
20. Approval granted/extended/refused/withdrawn: .....................................................................
21. Position of approval mark on the vehicle: .................................................................................
22. Place: ........................................................................................................................................
23. Date: ..........................................................................................................................................
24. Signature: ..................................................................................................................................

ANNEX 2
EXAMPLE OF THE APPROVAL MARKS
(See Paragraph 5.4. of this Regulation)
a = 8mm min
The above approval mark affixed to a component of silencing systems shows that the replacement
silencing system type concerned has been approved in the Netherlands (E 4) pursuant to
Regulation No. 92 under approval No. 012439. The first two digits of the approval number 01 indicate
that the approval was granted in accordance with the requirements of this current Regulation No. 92
whilst the approval number 00 indicate that the approval was granted in accordance with the
requirements of Regulation No. 92 in its original form.

ANNEX 4
STATEMENT OF COMPLIANCE WITH THE
ADDITIONAL SOUND EMISSION PROVISIONS
(Maximum format: A4 (210 × 297mm))
This statement is required for non-original replacement exhaust silencing systems specified for the use
on L Category vehicles that are type approved pursuant to the 04 series of amendments to Regulation
No. 41 and are subject to the requirements of Paragraph 6.3 of the 04 series of amendments to
Regulation No. 41.
................................................ (Name of manufacturer) attests that the non-original replacement exhaust
silencing systems of this type ...................................................................................... (type with regard to
its sound emission pursuant to the 04 series of amendments to Regulation No. 41) comply with the
requirements of Paragraph 6.3 of the 04 series of amendments to Regulation No. 41.
................................................ (Name of manufacturer) makes this statement in good faith, after having
performed an appropriate evaluation of the sound emission performance of the non-original replacement
exhaust silencing system in accordance with the requirements of Regulation No. 92.
Date: ..............................................................................................................................................................
Name of authorized representative: ..............................................................................................................
Signature of authorized representative: ...................................................................................................... "
Exhaust Silencer Replacement Systems - Motorcycles. Proposed Supplement 2 to the 01 Series.