Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:110:p15
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 110 (pt 15/59)
Character Range: 644284–648098

gaseous and particulate emissions over the ESC and ETC tests.

             3.2.1.3. A single engine-operating schedule shall be used for all engines in an engine-aftertreatment system family.

             3.2.1.4. At the request of the manufacturer and with the agreement of the type-approval authority, only one test cycle (either the ESC or ETC test) need be run at each test point with the other test cycle run only at the beginning and at the end of the service accumulation schedule.

             3.2.1.5. Operating schedules may be different for different engine-aftertreatment system families.

             3.2.1.6. Operating schedules may be shorter than the useful life period provided that the number of test points allows for a proper extrapolation of the test results, according to section 3.5.2. In any case, the service accumulation shall not be shorter than shown in the table in section 3.2.1.8.

             3.2.1.7. The manufacturer has to provide the applicable correlation between minimum service accumulation period (driving distance) and engine dyna- mometer hours, for example, fuel consumption correlation, vehicle speed versus engine revolutions correlation etc.

             3.2.1.8. Minimum service accumulation

                                                                                                                        Minimum service accumulation period  Useful life (Article of this Directive)
Category of vehicle in which engine will be installed
Category N1 vehicles                                                                                                    100 000 km                           Article 3(1)(a)
Category N2 vehicles                                                                                                    125 000 km                           Article 3(1)(b)
Category N3 vehicles with a maximum technically permissible mass not exceeding 16 tonnes                                125 000 km                           Article 3(1)(b)
Category N3 vehicles with a maximum technically permissible mass exceeding 16 tonnes                                    167 000 km                           Article 3(1)(c)
Category M2 vehicles                                                                                                    100 000 km                           Article 3(1)(a)
Category M3 vehicles of classes I, II, A and B, with a maximum techni- cally permissible mass not exceeding 7,5 tonnes  125 000 km                           Article 3(1)(b)
Category M3 vehicles of classes III and B, with a maximum technically permissible mass exceeding 7,5 tonnes             167 000 km                           Article 3(1)(c)

             3.2.1.9. The in-service accumulation schedule shall be fully described in the application for type-approval and reported to the type-approval authority before the start of any testing.

             3.2.2. If the type-approval authority decides that additional measurements need to be carried out on the ESC and ETC tests between the points selected by the manufacturer it shall notify the manufacturer. The revised in-service accumulation schedule or dynamometer service accumulation sched- ule shall be prepared by the manufacturer and agreed by the type-approval authority.

             3.3. Engine testing

             3.3.1. Start of the service accumulation schedule

             3.3.1.1. For each engine-aftertreatment system family, the manufacturer shall determine the number of hours of engine running after which the operation of the engine-after-treatment system has stabilised. If requested by the approval authority the manufacturer shall make available the data and analy- sis used to make this determination. As an alternative, the manufacturer may elect to run the engine