Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p27
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 27/150)
Character Range: 789723–792748

analyser system and its sampling line, shall be determined in accordance with paragraph A.8.1.3.7. of Appendix 8 to Annex 4. "Transformation time" means the time difference between a change of concentration at the reference point and a system response of 50 per cent of the final reading.

                  Annex 8 ‑ Appendix 4 Method to check the conformity of the ECU torque-signal
A.4.1.  Introduction
              This appendix describes in a non-detailed manner the method used to check the conformity of the ECU torque-signal during ISC-PEMS testing.
              The detailed applicable procedure is left to the engine manufacturer, subject to approval of the Type Approval Authority.
A.4.2. The "Maximum torque" method
              A.4.2.1. The "Maximum torque" method consists of demonstrating that a point on the reference maximum torque curve as a function of the engine speed has been reached during vehicle testing.
              A.4.2.1.1. If a market fuel declared in paragraph 3.2.2.2.1. of Part 1 of Annex 1 to this Regulation is used and a power correction factor in accordance with paragraph 3.2.2.2.2. of Part 1 of Annex 1 to this Regulation was documented for the dedicated market fuel used for the test, the ECU torque signal has to be multiplied by the inverted correction factor prior to the verification with the reference maximum torque curve performed with this specific market fuel.
              A.4.2.2. If a point on the reference maximum torque curve as a function of the engine speed has not been reached during the ISC PEMS emissions testing, the manufacturer is entitled to modify the load of the vehicle and/or the testing route as necessary in order to perform that demonstration after the ISC PEMS emissions test has been completed.

Annex 9A On-board diagnostic systems (OBD)
1. Introduction
              1.1. This annex sets out the functional aspects of on-board diagnostic (OBD) systems for the control of emissions from engine systems which are covered by this Regulation.

2. General requirements
              2.1. The general requirements, including the specific requirements for electronic system security, shall be those set out in paragraph 4. of Annex 9B and those described in paragraph 2. of this annex.

              2.2.  Requirements regarding operating sequences and driving cycles for hybrid vehicles and vehicles with stop-start systems.

              2.2.1.1. For vehicles that employ engine shut-off strategies that are commanded by the engine control system (for example hybrid bus with engine shut-off at idle) and that are followed by an engine cranking, the (engine shut-off – engine cranking) sequence shall be considered as part of the existing operating sequence.

              2.2.1.2. The manufacturer shall provide the description of such strategies in the documentation considered in paragraphs 3.1.3. (a) and 3.1.3. (b) of this Regulation.

              2.2.1.3. In the case of a hybrid vehicle, the operating sequence shall start at the