Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:5:p23
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 5 (pt 23/36)
Character Range: 484419–487518

Directive (*).

         6.1.3.            Emission control strategy

         6.1.3.1.        Any element of design and emission control strategy (ECS) liable to affect the emission of gaseous and particulate pollutants from diesel engines and the emission of gaseous pollutants from gas engines shall be so designed, constructed, assembled and installed as to enable the engine, in normal use, to comply with the provisions of this Directive. ECS consists of the base emission control strategy (BECS) and usually one or more auxiliary emission control strategies (AECS).

         6.1.4.            Requirements for base emission control strategy

         6.1.4.1.        The base emission control strategy (BECS) shall be so designed as to enable the engine, in normal use, to comply with the provisions of this Directive. Normal use is not restricted to the conditions of use as specified in paragraph 6.1.5.4.

         6.1.5.            Requirements for auxiliary emission control strategy

         6.1.5.1.        An auxiliary emission control strategy (AECS) may be installed to an engine or on a vehicle provided that the AECS:

            —      operates only outside the conditions of use specified in paragraph 6.1.5.4 for the purposes defined in paragraph 6.1.5.5, or
            —      is activated only exceptionally within the conditions of use specified in paragraph 6.1.5.4 for the purposes defined in para- graph 6.1.5.6. and not longer than is needed for these purposes.

         6.1.5.2.        An auxiliary emission control strategy (AECS) that operates within the conditions of use specified in section 6.1.5.4 and which results in the use of a different or modified emission control strategy (ECS) to that normally employed during the applicable emission test cycles will be permitted if, in complying with the requirements of section 6.1.7, it is fully demonstrated that the measure does not permanently reduce the effectiveness of the emission control system. In all other cases, such strategy shall be considered to be a defeat strategy.

         6.1.5.3.        An auxiliary emission control strategy (AECS) that operates outside the conditions of use specified in section 6.1.5.4 will be permitted if, in complying with the requirements of section 6.1.7, it is fully demonstrated that the measure is the minimum strategy necessary for the purposes of paragraph 6.1.5.6 with respect to environmental protection and other technical aspects. In all other cases, such a strategy shall be considered to be a defeat strategy.

         6.1.5.4.        As provided for in section 6.1.5.1, the following conditions of use apply under steady state and transient engine operations:

            —      an altitude not exceeding 1 000 metres (or equivalent atmospheric pressure of 90 kPa), and
            —      an ambient temperature within the range 275 K to 303 K (2 °C to 30 °C) (**) (***), and
            —      engine coolant temperature within the range 343 K to 373 K (70 °C to 100 °C).

          6.1.5.5.        An auxiliary emission control strategy (AECS) may be