Document ID: chunk:federal_register_of_legislation:F2023L00129:front:0:p41
Version: federal_register_of_legislation:F2023L00129
Segment Type: other
Provision Reference: 
Character Range: 112824–115855

any adjustment to the engines selected.

              8.3.2.1. Three engines shall be taken from the series production of the engines under consideration. Engines shall be subjected to testing on the WHTC and on the WHSC, if applicable, for the checking of the production conformity. The limit values shall be those set out in paragraph 5.3.

              8.3.2.2. Where the Type Approval Authority is satisfied with the production standard deviation given by the manufacturer in accordance with Appendix 2 to the 1958 Agreement (E/ECE/324//E/ECE/TRANS/505/Rev.2), the tests shall be carried out according to Appendix 1.

              Where the Type Approval Authority is not satisfied with the production standard deviation given by the manufacturer in accordance with Appendix 2 to the 1958 Agreement (E/ECE/324//E/ECE/TRANS/505/Rev.2), the tests shall be carried out according to Appendix 2.

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

              8.3.2.3. On the basis of tests of the engine by sampling as set out in paragraph 8.3.2.2., the series production of the engines under consideration is regarded as conforming where a pass decision is reached for all the pollutants and as 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 as a consequence of a result from any additional tests made in order to reach a decision for the other pollutants.

              If a pass decision is not reached for all the pollutants and if no fail decision is reached for any pollutant, a test is carried out on another engine (see Figure 1).

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

              Figure 1
              Schematic of production conformity testing

              8.3.3. The tests shall be carried out on newly manufactured engines.

              8.3.3.1. At the request of the manufacturer, the tests may be carried out on engines which have been run-in, up to a maximum of 125 hours. In this case, the running-in procedure shall be conducted by the manufacturer who shall undertake not to make any adjustments to those engines.

              8.3.3.2. When the manufacturer requests to conduct a running-in procedure in accordance with paragraph 8.3.3.1., it may be carried out on either of the following:

              (a) All the engines that are tested;

                  (b) The first engine tested, with the determination of an evolution coefficient as follows:

                     (i) The pollutant emissions shall be measured both on the newly manufactured engine and before the maximum of 125 hours set in paragraph 8.3.3.1. on the first engine tested;

                     (ii) The evolution coefficient of the emissions between the two tests