Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:13:p20
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 13 (pt 20/27)
Character Range: 690591–695490

testing for gaseous and particulate emissions over the WHTC and WHSC tests.
3.2. Service accumulation schedule
               Service accumulation schedules may be carried out at the choice of the manufacturer by running a vehicle equipped with the selected engine over an in-service accumulation schedule or by running the selected engine over a dynamometer service accumulation schedule.
              3.2.1. In-service and dynamometer service accumulation
              3.2.1.1. The manufacturer shall determine the form and extent of the distance, the service accumulation and the ageing cycle for engines, consistent with good engineering practice.
              3.2.1.2. The manufacturer shall determine the test points where gaseous and particulate emissions will be measured over the hot WHTC and WHSC tests. The minimum number of test points shall be three, one at the beginning, one approximately in the middle and one at the end of the service accumulation schedule.
              3.2.1.3. The emission values at the start point and at the useful life end point calculated in accordance with paragraph 3.5.2. shall meet the limit values specified in paragraph 5.3. of this Regulation but individual emission results from the test points may exceed those limit values.
              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 hot WHTC or WHSC test) needs to 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. Service accumulation schedules may be different for different engine-after-treatment system families.
              3.2.1.6. Service accumulation schedules may be shorter than the useful life period, but shall not be shorter than shown in Table 1 in paragraph 3.2.1.8.
              3.2.1.7. For engine dynamometer service accumulation, the manufacturer shall provide the applicable correlation between the service accumulation period (driving distance) and engine dynamometer hours, for example, fuel consumption correlation, vehicle speed versus engine revolutions correlation etc.
              3.2.1.8. Minimum service accumulation period
       Table 1
       Minimum service accumulation period
Category of vehicle in which engine will be installed[29]                                                            Minimum service accumulation period  Useful life
Category N1 vehicles                                                                                                 160,000 km                           See paragraph 5.4.
                                                                                                                                                          of this Regulation
Category N2 vehicles                                                                                                 188,000 km                           See paragraph 5.4.
                                                                                                                                                          of this Regulation
Category N3 vehicles with a maximum technically permissible mass not exceeding 16 tonnes                             188,000 km                           See paragraph 5.4.
                                                                                                                                                          of this Regulation
Category N3 vehicles with a maximum technically permissible mass exceeding 16 tonnes                                 233,000 km                           See paragraph 5.4.
                                                                                                                                                          of this Regulation
Category M1 vehicles                                                                                                 160,000 km                           See paragraph 5.4.
                                                                                                                                                          of this Regulation
Category M2 vehicles                                                                                                 160,000 km                           See paragraph 5.4.
                                                                                                                                                          of this Regulation
Category M3 vehicles of classes I, II, A and B with a maximum technically permissible mass not exceeding 7.5 tonnes  188,000 km                           See paragraph 5.4.
                                                                                                                                                          of this Regulation