Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:5:p32
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 5 (pt 32/36)
Character Range: 509854–512880

reagent consumption and average demanded reagent consumption by the engine system over the period defined in section 6.5.4.8 shall result in application of the measures laid down in paragraph 6.5.4.13.

          6.5.4.11.      In the case of interruption in reagent dosing activity the measures laid down in paragraph 6.5.4.13 shall apply. This is not required where such interruption is demanded by the engine ECU because engine operating conditions are such that the engine's emission performance does not require reagent dosing, provided that the manufacturer has clearly informed the approval authority when such operating conditions apply.

          6.5.4.12.      If the NOx level exceeds 7,0 g/kWh on the ETC test cycle the measures laid down in section 6.5.4.13 shall apply.

          6.5.4.13.      Where reference is made to this section, the driver shall be alerted by activation of the MI (see section 3.6.5 of Annex IV to Directive 2005/78/EC) and a torque limiter shall reduce the performance of the engine according to the requirements of section 6.5.5 in a man- ner that is clearly perceived by the driver of the vehicle.

          A non-erasable fault code identifying the reason for torque limiter activation shall be stored in accordance with paragraph 3.9.2 of Annex IV to Directive 2005/78/EC for a minimum of 400 days or 9 600 hours of engine operation.

          6.5.5.             Measures to discourage tampering of exhaust aftertreatment systems

          6.5.5.1.         Any engine system covered by this section shall include a torque limiter that will alert the driver that the engine system is operating incorrectly or the vehicle is being operated in an incorrect manner and thereby encourage the prompt rectification of any fault(s).

          6.5.5.2.         The torque limiter shall be activated when the vehicle becomes stationary for the first time after the conditions of either sec- tions 6.5.3.4, 6.5.4.3, 6.5.4.6, 6.5.4.10, 6.5.4.11 or 6.5.4.12 have occurred.

          6.5.5.3.         Where the torque limiter comes into effect, the engine torque shall not, in any case, exceed a constant value of:

            —      60 % of full load torque, independent of engine speed, for vehicles of category N3 > 16 tons, M3/III and M3/B > 7,5 tons,

            —      75 % of full load torque, independent of engine speed, for vehicles of category N1, N2, N3 ≤ 16 tons, M2, M3/I, M3/II, M3/A and M3/B ≤ 7,5 tons.

          6.5.5.4.         The scheme of torque limitation is set out in sections 6.5.5.5 to 6.5.5.6.

          6.5.5.5.         Detailed written information fully describing the functional operation characteristics of the torque limiter shall be specified accord- ing to the documentation requirements of section 6.1.7.1 of this Annex.

          6.5.5.6.         The torque limiter shall be deactivated when the engine speed is at idle if the conditions for its activation have ceased to exist. The torque limiter shall not be automatically deactivated without the