Document ID: chunk:federal_register_of_legislation:F2023L00129:front:0:p48
Version: federal_register_of_legislation:F2023L00129
Segment Type: other
Provision Reference: 
Character Range: 131722–134729

the reference maximum engine torque as a function of engine speed shall be made available by the OBD system in real time and at a frequency of at least 1 Hz, as mandatory data stream information.
9.4.2.2. The output torque may be estimated by the ECU using built-in algorithms to calculate the produced internal torque and the friction torque.
9.4.2.3. The engine torque in Nm resulting from the above data stream information shall permit a direct comparison with the values measured when determining the engine power according to Regulation No. 85. In particular, any eventual corrections as regards auxiliaries shall be included in the above data stream information.
9.4.2.4. Access to the information required in paragraph 9.4.2.1. shall be provided in accordance with the requirements set out in Annex 9A and with the standards referred to in Appendix 6 to Annex 9B.
              9.4.2.5 The average load at each operating condition in Nm calculated from the information requested in paragraph 9.4.2.1. shall not differ from the average measured load at that operating condition by more than:

                  (a) 7 per cent when determining the engine power according to UN Regulation No. 85;

                  (b) 10 per cent when performing the World Harmonised Steady state Cycle (hereinafter "WHSC") except for mode 1 and 13 (idle modes) according to Annex 4, paragraph 7.7.

              UN Regulation No. 85 allows the actual maximum load of the engine to differ from the reference maximum load by 5 per cent in order to address the manufacturing process variability. This tolerance is taken into account in the above values.

              9.4.2.6.  External access to the information required in paragraph 9.4.2.1. shall not influence the vehicle emissions or performance.

              9.4.2.7.     If the difference between the measured torque value obtained with a declared market fuel according to paragraph 4.2.6. and the torque calculated from the information requested in paragraph 9.4.2.1. exceeds one of the values specified in paragraph 9.4.2.5. the following paragraph 9.4.2.8. applies.

              9.4.2.8.  A power correction factor for each additional market fuel permitted by the manufacturer shall be determined for the engine family. The correction factor shall be calculated as the ratio between average measured peak torque [Nm] on the reference fuel according to Annex 5 and average measured peak torque [Nm] on the market fuel declared.

              9.4.3. Verification of the availability and conformity of the ECU information required for in-service testing

              9.4.3.1.  The availability of the data stream information required in paragraph 9.4.2.1. according to the requirements set out in paragraph 9.4.2.2. shall be demonstrated by using an external OBD scan-tool as described in Annex X.

              9.4.3.2. In the case where this information cannot be retrieved in a proper manner, using a scan-tool that is working properly, the engine is