Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:110:p54
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 110 (pt 54/59)
Character Range: 756450–759584

into effect, the engine torque shall not, in any case, exceed a constant value  of:

                -           60 % of the engine maximum torque for vehicles of category N3 > 16 tonnes, M1 > 7,5 tonnes, M3/III and M3/B > 7,5 tonnes,

                -           75 % of the engine maximum torque for vehicles of category N1, N2, N3 ≤ 16 tons, 3,5 < M1 ≤ 7,5 tonnes, M2, M3/I, M3/II, M3/A and M3/B ≤ 7,5 tonnes.

              6.5.5.4.        Requirements for documentation and the torque limiter are set out in sections 6.5.5.5 to 6.5.5.8.

              6.5.5.5.        Detailed written information fully describing the functional operation characteristics of the emission control monitoring system and the torque limiter shall be specified according to the documentation requirements of section 6.1.7.1.(b). Specifically, the manufacturer shall provide information on the algorithms used by the ECU for relating the NOx concentration to the specific NOx emission (in g/kWh) on the ETC in accordance with section 6.5.6.5.

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

              6.5.5.7.        Deactivation of the torque limiter shall not be feasible by means of a switch or a maintenance tool.

              6.5.5.8.        The torque limiter shall not apply to engines or vehicles for use by the armed services, by rescue services and by fire-services and ambulances. Permanent deactivation shall only be done by the engine or vehicle manufacturer, and a special engine type within the engine family shall be designated for proper identifi- cation.

              6.5.6.            Operating conditions of the emission control monitoring system

              6.5.6.1.        The emission control monitoring system shall be operational,

                -           at all ambient temperatures between 266 K and 308 K (– 7 °C and 35 °C),

                -           at all altitudes below 1 600 m,

                -           at engine coolant temperatures above 343 K (70 °C).

              This section does not apply in the case of monitoring for reagent level in the storage tank where moni- toring shall be conducted under all conditions of use.

              6.5.6.2.        The emission control monitoring system may be deactivated when a limp-home strategy is active and which results in a torque reduction greater than the levels indicated in section 6.5.5.3 for the appropriate vehicle category.

              6.5.6.3.        If an emission default mode is active, the emission control monitoring system shall remain operational and comply with the provisions of section 6.5.

              6.5.6.4.        The incorrect operation of NOx control measures shall be detected within four OBD test cycles as referred to in the definition given in section 6.1 of Appendix 1 of Annex IV to Directive 2005/78/EC.

              6.5.6.5.        Algorithms used by the ECU for relating the