Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:4:p38
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 4 (pt 38/42)
Character Range: 109935–112901

to Directive 70/156/EEC, which applies to motor vehicles and their trailers.

      At the manufacturer's request, the tests may be carried out in accordance with Appendix 3 to this Annex.

9.1.1.1.3.                On the basis of a test of the engine by sampling, the production of a series is regarded as conforming where a pass decision is reached for all the pollutants and non-conforming where a fail decision is reached for one pollutant, in accordance with the test criteria applied in the appropriate Appendix.

              When a pass decision has been reached for one pollutant, this decision may not be changed by any additional tests made in order to reach a decision for the other pollutants.

              If no pass decision is reached for all the pollutants and if no fail decision is reached for one pollutant, a      test is carried out on another engine (see Figure 2).

              If no decision is reached, the manufacturer may at any time decide to stop testing. In that case a fail decision is recorded.

9.1.1.2.                    The tests will be carried out on newly manufactured engines. Gas fuelled engines shall be run-in using the procedure defined in paragraph 3 of Appendix 2 to Annex III.

9.1.1.2.1.                However, at the request of the manufacturer, the tests may be carried out on diesel or gas engines which have been run-in more than the period referred to in Section 9.1.1.2, up to a maximum of 100 hours. In this case, the running-in procedure will be conducted by the manufacturer who shall undertake not to make any adjustments to those engines.

9.1.1.2.2.                When the manufacturer asks to conduct a running-in procedure in accordance with Section 9.1.1.2.1, it may be carried out on:

                —    all the engines that are tested, or
                —    the first engine tested, with the determination of an evolution coefficient as follows:

                  —    the pollutant emissions will be measured at zero and at 'x' hours on the first engine tested,

                  —    the evolution coefficient of the emissions between zero and 'x' hours will be calculated for each pollutant:

             emissions 'x' hours/emissions zero hours

             It may be less than one.

              The subsequent test engines will not be subjected to the running-in procedure, but their zero hour emissions will be modified by the evolution coefficient.

              In this case, the values to be taken will be:

                —    the values at 'x' hours for the first engine,

                —    the values at zero hour multiplied by the evolution coefficient for the other engines.

              9.1.1.2.3.                For diesel and LPG fuelled engines, all these tests may be conducted with commercial fuel. However, at the manufacturer's request, the reference fuels described in Annex IV may be used. This implies tests, as described in Section 4 of this Annex,