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Agreement - UNECE

GE. 11 Agreement Concerning the adoption of uniform technical prescriptions for wheeled vehicles, equipment and parts which can be fitted and/or be used on wheeled vehicles and the conditions for reciprocal recognition of approvals granted on the basis of these prescriptions* (Revision 2, including the amendments entered into force on 16 October 1995) _____ Addendum 50: Regulation No. 51 Revision 2 Incorporating all valid text up to: 02 series to the original version of the Regulation - Date of entry into force: 18 April 1995 Supplement 1 to the 02 series of amendments - Date of entry into force: 05 May 1996 Corrigendum 1 to the 02 series of amendments - Date of entry into force: 15 November 1996 Corrigendum 2 to the 02 series of amendments - Date of entry into force: 11 Mars 1998 Corrigendum 1 to Supplement 3 to 02 series of amendments - Date of entry into fo

E GE. 11 Agreement Concerning the adoption of uniform technical prescriptions for wheeled vehicles, equipment and parts which can be fitted and/or be used on

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Transcription of Agreement - UNECE

1 GE. 11 Agreement Concerning the adoption of uniform technical prescriptions for wheeled vehicles, equipment and parts which can be fitted and/or be used on wheeled vehicles and the conditions for reciprocal recognition of approvals granted on the basis of these prescriptions* (Revision 2, including the amendments entered into force on 16 October 1995) _____ Addendum 50: Regulation No. 51 Revision 2 Incorporating all valid text up to: 02 series to the original version of the Regulation - Date of entry into force: 18 April 1995 Supplement 1 to the 02 series of amendments - Date of entry into force: 05 May 1996 Corrigendum 1 to the 02 series of amendments - Date of entry into force: 15 November 1996 Corrigendum 2 to the 02 series of amendments - Date of entry into force: 11 Mars 1998 Corrigendum 1 to Supplement 3 to 02 series of amendments - Date of entry into force.

2 07 March 2001 Supplement 4 to 02 series of amendments - Date of entry into force: 02 February 2007 Supplement 5 to 02 series of amendments - Date of entry into force: 18 June 2007 Supplement 6 to 02 series of amendments - Date of entry into force: 03 February 2008 Supplement 7 to 02 series of amendments - Date of entry into force: 30 January 2011 Corrigendum 3 to 02 series of amendments - Date of entry into force: 09 March 2011 Uniform provisions concerning the approval of motor vehicles having at least four wheels with regard to their noise emissions _____ UNITED NATIONS * Former title of the Agreement : Agreement Concerning the Adoption of Uniform Conditions of Approval and Reciprocal Recognition Vehicle Equipment and Parts, done at Geneva on 20 March 1958.

3 E/ECE/324 E/ECE/TRANS/505 29 November 2011 E/ECE/324 E/ECE/TRANS/505 3 Regulation No. 51 Uniform provisions concerning the approval of motor vehicles having at least four wheels with regard to their noise emissions Contents Page 1. Scope .. 4 2. Definitions .. 4 3. Application for approval .. 6 4. Markings .. 7 5.

4 Approval .. 7 6. Specifications .. 8 7. Modification and extension of approval of a vehicle type .. 10 8. Conformity of 10 9. Penalties for non-conformity of production .. 11 10. Production definitively 12 11. Transitional 12 12. Names and addresses of Technical Services responsible for conducting approval tests and of Type Approval 12 Annexes 1 Communication.

5 13 2 Arrangements of the approval mark .. 17 3 Methods and instruments for measuring the noise made by motor vehicles (measurement method A) .. 18 Appendix: Measuring positions for vehicles in 28 4 Classification of vehicles .. 31 5 Silencing systems containing acoustically absorbing fibrous materials .. 33 Appendix: Figure 3 .. 35 6 Compressed air noise .. 36 Appendix: Figure 1.

6 37 7 Checks on conformity of 38 8 Specifications for the test 39 9 Vehicle test data pursuant to measurement method 46 10 Methods and instruments for measuring the noise made by motor vehicles (measurement method B) .. 49 E/ECE/324 E/ECE/TRANS/505 4 1. Scope This Regulation applies to vehicles of category M and N1 with regard to noise. 2.

7 Definitions For the purpose of this Regulation, "Approval of a vehicle" means the approval of a vehicle type with regard to noise; "Vehicle type" means a category of motor vehicles which do not differ in such essential respects as: The shape or materials of the bodywork (particularly the engine compartment and its soundproofing); The length and width of the vehicle; 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, rated maximum power and corresponding engine speed(s), or the type of electric motor; The transmission system, the number of gears and ratios.

8 The noise reduction system as defined in the following paragraphs and Notwithstanding the provisions of paragraphs and , vehicles other than those in categories M1 and N11having the same type of engine and/or different overall gear ratios, may be regarded as vehicles of the same type. However, if the above differences provide for a different test method, these differences are to be considered as a change of type. "Noise reduction system" means a complete set of components necessary for limiting the noise made by a motor vehicle and its exhaust; "Noise reduction systems of different types" means noise reduction systems which differ in such essential respects as: That their components as specified in paragraph , bear different trade names or marks.

9 That the characteristics of the materials constituting a component are different or that the components differ in shape or size, a change in the plating procedure (galvanization, aluminium coating, etc.) is not deemed to produce a difference of type; That the operating principles of at least one component are different; That their components are assembled differently; 1 As defined in the Consolidated resolution on the Construction of vehicles ( ), document ECE/ , E/ECE/324 E/ECE/TRANS/505 5 That the number of the intake and/or exhaust silencers is different.

10 "Noise reduction system component" means one of the individual constituent parts whose assembly constitutes the noise reduction system. These components are, in particular: the exhaust pipings, the expansion chamber(s), the silencer(s) proper. The air filter is considered as a component only if its presence is essential to ensure observance of the prescribed sound-level limits. Manifolds are not considered components of the noise reduction system. "Maximum mass" means the technically permissible maximum mass declared by the vehicle manufacturer (this mass may be greater than the maximum mass authorized by the national administration).


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