Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:110:p18
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 110 (pt 18/59)
Character Range: 653150–656427

(1)  ESC         1,1   1,05  —     —     1,05  1,1
ETC                1,1         1,05  —     —     1,05  1,1
Gas engine (1)     ETC         1,1   1,05  1,05  1,2   1,05  —

              (1) Where appropriate and on the basis of information to be supplied by the Member States, the Commission may propose a revision of the DF's shown in this table in accordance with the procedure laid down in Article 13 of Directive 70/156/EEC.

             3.6.1. The manufacturer may select to carry across the DF's determined for an engine or engine/aftertreatment combination to engines or engine/aftertreatment combinations that do not fall into the same engine family category as determined according to section 2.1. In such cases, the manufacturer must demonstrate to the approval authority that the base engine or engine/aftertreatment combination and the engine or engine/aftertreatment combination for which the DF's are being carried over have the same technical specifications and installation requirements on the vehicle and that the emissions of such engine or engine/aftertreatment combinations are similar.

             3.7. Checking of conformity of production

             3.7.1. Conformity of production for emissions compliance is checked on the basis of section 9 of Annex I to Directive 2005/55/EC.

             3.7.2. At the time of type-approval, the manufacturer may choose to measure at the same time the pollutant emissions before any exhaust aftertreat- ment system. In so doing, the manufacturer may develop an informal deterioration factor separately for the engine and the aftertreatment system that may be used by the manufacturer as an aid to end of production line auditing.

             3.7.3. For the purposes of type-approval, only the deterioration factors adopted by the manufacturer from section 3.6.1 or the deterioration factors developed according to section 3.5 shall be recorded in section 1.4 of Appendix 1 to Annex VI to Directive 2005/55/EC.

         4.        MAINTENANCE

              During the service accumulation schedule, maintenance performed on engines and proper consumption of any required reagent used to deter- mine deterioration factors are classified as either emission-related or non-emission-related and each of these can be classified as scheduled and unscheduled. Some emission-related maintenance is also classified as critical emission-related maintenance.

             4.1. Emission-related scheduled maintenance

             4.1.1. This section specifies emission-related scheduled maintenance for the purpose of conducting a service accumulation schedule and for inclusion in the maintenance instructions furnished to owners of new heavy-duty vehicles and heavy-duty engines.

             4.1.2. All emission-related scheduled maintenance for purposes of conducting a service accumulation schedule must occur at the same or equivalent distance intervals that will be specified in the manufacturer's maintenance instructions to the owner of the heavy-duty vehicle or heavy-duty engine. This maintenance schedule may be updated as necessary throughout the service accumulation schedule provided that no maintenance operation is deleted from the maintenance schedule after the operation has been performed on the