Document ID: chunk:federal_register_of_legislation:F2021C00509:front:0:p7
Version: federal_register_of_legislation:F2021C00509
Segment Type: other
Provision Reference: 
Character Range: 19078–22627

02 series of Amendments, up to and including corrigendum 1 to supplement 3 to the 02 series
Regulation No. 51

UNIFORM PROVISIONS CONCERNING THE APPROVAL OF MOTOR VEHICLES HAVING AT LEAST FOUR WHEELSWITH REGARD TO THEIR NOISE EMISSIONS

Contents
REGULATION
1. Scope
2. Definitions
3. Application for approval
4. Markings
5. Approval
6. Specifications
7. Modification and extension of approval of a vehicle type
8. Conformity of production
9. Penalties for non-conformity of production
10. Production definitely discontinued
11. Transitional provisions
    12. Names and addresses of technical services responsible for conducting approval tests, and of administrative departments

ANNEXES
Annex 1 - Communication concerning the approval or extension or refusal or with-Drawal of
         approval or production definitely discontinued of a vehicle type with regard to its noise emission pursuant to Regulation No. 51
Annex 2 - Arrangements of the approval mark
Annex 3 - Methods and instruments for measuring the noise made by motor vehicle
Annex 4 - Classification of vehicles
Annex 5 - Exhaust systems containing fibrous materials
Annex 6 - Compressed air noise
Annex 7 - Checks on conformity of production
Annex 8 - Specifications for the test site

Regulation No. 51

UNIFORM PROVISIONS CONCERNING THE APPROVAL OF MOTOR VEHICLESHAVING AT LEAST FOUR WHEELSWITH REGARD TO THEIR NOISE EMISSIONS

            1. SCOPE

           This Regulation contains provisions relating to the noise emitted by motor vehicles having at least four wheels.

           2.                                                    DEFINITIONS

           For the purposes of this Regulation,

           2.1.                                              "Approval of a vehicle" means the approval of a vehicle type with regard to noise;

           2.2.                                              "Vehicle type" means a category of motor vehicles which do not differ in such essential respects as:

           2.2.1.                                        the shape or materials of the bodywork (particularly the engine compartment and its soundproofing);

           2.2.2.                                        the length and width of the vehicle;

           2.2.3.                                        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 carburetors or injection system, arrangement of valves, rated maximum power and corresponding engine speed(s), or the type of electric motor;

           2.2.4.                                        the transmission system, the number of gears and ratios;

           2.2.5.                                        the noise reduction system as defined in the following paragraphs 2.3 and 2.4.

           2.2.6.                                        Notwithstanding the provisions of paragraphs 2.2.2 and 2.2.4, vehicles other than those in categories M1 and N1 [1]/ having 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.

           2.3.                                              "Noise reduction system" means a complete set of components necessary for limiting the noise made by a motor vehicle and its exhaust;

           2.4.                                              "Noise reduction