Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:110:p57
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 110 (pt 57/59)
Character Range: 765021–768108

to determine in which way the NOx control monitoring system is expected to react during the demonstration process (torque reduction and/or warning signal). The failure shall be simulated in a way that the NOx level does not exceed by more than 1 g/kWh any of the threshold levels given in sections 6.5.3.2 or 6.5.3.4.

              Emissions qualification is not required in case of an empty reagent tank or for demonstrating a failure of the emission control monitoring system.

              The torque limiter shall be deactivated during the qualification phase.

              6.5.8.3.3.    For the demonstration phase, the engine shall be run over a maximum of four OBD test cycles.

              No failure other than the ones which are being considered for demonstration purposes shall be present.

              6.5.8.3.4.    Prior to starting the test sequence of section 6.5.8.3.3, the emission control monitoring system shall be set to a "no failure" status.

              6.5.8.3.5.    Depending on the NOx level selected, the system shall activate a warning signal and in addition, if applicable, the torque limiter at any time before the end of the detection sequence. The detection sequence may be stopped once the NOx control monitoring system has properly reacted.

              6.5.8.4.        In the case of an emission control monitoring system principally based on monitoring the NOx level by sensors positioned in the exhaust stream, the manufacturer may choose to directly monitor certain system functionalities (e.g. interruption of dosing activity, closed EGR valve) for the determination of compliance. In that case, the selected system functionality shall be demonstrated.

              6.5.8.5.        The level of torque reduction required in section 6.5.5.3 by the torque limiter shall be approved together with the general engine performance approval in accordance with Directive 80/1269/EC. For the demon- stration process, the manufacturer shall demonstrate to the type-approval authority the inclusion of the correct torque limiter into the engine ECU. Separate torque measurement during the demonstration is not required.

              6.5.8.6.        As an alternative to sections 6.5.8.3.3 to 6.5.8.3.5, the demonstration of the emission control monitoring system and the torque limiter may be performed by testing a vehicle. The vehicle shall be driven on the road or on a test track with the selected incorrect operations or failures of the emission control monitoring system to demonstrate that the warning signal and activation of the torque limiter will operate in accordance with the requirements of section 6.5, and, in particular, those in sections 6.5.5.2. and 6.5.5.3.

              6.5.8.7.        If the storage in the computer memory of a non-erasable fault code is required for complying with the requirements of section 6.5, the following three conditions shall be met by the end of demonstration sequence:

                -           that it is possible to confirm via the OBD scan tool the presence in the OBD computer memory