Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:4:p35
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 4 (pt 35/42)
Character Range: 100285–103792

0,55                              1,1                2,0                           0,03
C (EEV)    3,0                        0,40                              0,65               2,0                           0,02

               (1)  For NG engines only.
               (2)  Not applicable for gas fuelled engines at stage A and stages B1 and B2.
               (3)  For engines having a swept volume of less than 0,75 dm3 per cylinder and a rated power speed of more than                  3 000 min-1.

6.2.2.                        Hydrocarbon measurement for diesel and gas fuelled engines

              6.2.2.1. A manufacturer may choose to measure the mass of total hydrocarbons (THC) on the ETC test instead of measuring the mass of non-methane hydrocarbons. In this case, the limit for the mass of total hydrocarbons is the same as shown in Table 2 for the mass of non-methane hydrocarbons.

6.2.3.                        Specific requirements for diesel engines

6.2.3.1.                    The specific mass of the oxides of nitrogen measured at the random check points within the control area of the ESC test must not exceed by more than 10 per cent the values interpolated from the adjacent test modes (reference Annex III, Appendix 1, Sections 4.6.2 and 4.6.3).

6.2.3.2.                    The smoke value on the random test speed of the ELR must not exceed the highest smoke value of the      two adjacent test speeds by more than 20 per cent, or by more than 5 per cent of the limit value, whichever is greater.

7.                                 INSTALLATION ON THE VEHICLE

7.1.                            The engine installation on the vehicle shall comply with the following characteristics in respect to the type-approval of the engine:

              7.1.1.                        intake depression shall not exceed that specified for the type-approved engine in Annex VI;

              7.1.2.                        exhaust back pressure shall not exceed that specified for the type-approved engine in Annex VI;

7.1.3.                        the exhaust system volume shall not differ by more than 40 % of that specified for the type-approved engine in Annex VI;

7.1.4.                        power absorbed by the auxiliaries needed for operating the engine shall not exceed that specified for the type-approved engine in Annex VI.

8.                                 ENGINE FAMILY

8.1.                            Parameters defining the engine family

              The engine family, as determined by the engine manufacturer, may be defined by basic characteristics which must be common to engines within the family. In some cases there may be interaction of parameters. These effects must also be taken into consideration to ensure that only engines with similar exhaust emission characteristics are included within an engine family.

              In order that engines may be considered to belong to the same engine family, the following list of basic parameters must be common:

              8.1.1.                        Combustion cycle:

                —    2 cycle

                —    4 cycle

              8.1.2.                        Cooling medium:

                —    air

                —    water

                —    oil

              8.1.3.                        For gas engines and engines with aftertreatment:

              — number of cylinders

              (other diesel engines with fewer cylinders than the parent engine may be considered