Document ID: chunk:federal_register_of_legislation:F2012C00283:reg:7:p32
Version: federal_register_of_legislation:F2012C00283
Segment Type: reg
Provision Reference: reg 7 (pt 32/51)
Character Range: 594517–597565

developed by the procedures in this annex for type approval of a vehicle type with a periodically regenerating system as defined in paragraph 2.20. of this Regulation, may be extended to other vehicles in the family group with a reference mass within the next two higher equivalent inertia classes or any lower equivalent inertia.
              3. Test Procedure
               The vehicle may be equipped with a switch capable of preventing or permitting the regeneration process provided that this operation has no effect on original engine calibration. This switch shall be permitted only for the purpose of preventing regeneration during loading of the regeneration system and during the pre-conditioning cycles. However, it shall not be used during the measurement of emissions during the regeneration phase; rather the emission test shall be carried out with the unchanged Original Equipment Manufacturer's (OEM) control unit.
              3.1. Exhaust emission measurement between two cycles where regenerative phases occur
              3.1.1. Average emissions between regeneration phases and during loading of the regenerative device shall be determined from the arithmetic mean of several approximately equidistant (if more than 2) Type I operating cycles or equivalent engine test bench cycles. As an alternative, the manufacturer may provide data to show that the emissions remain constant (±15 per cent) between regeneration phases. In this case, the emissions measured during the regular Type I Test may be used. In any other case emissions measurement for at least two Type I operating cycles or equivalent engine test bench cycles must be completed: one immediately after regeneration (before new loading) and one as close as possible prior to a regeneration phase. All emissions measurements and calculations shall be carried out according to Annex 4a, paragraphs 6.4. to 6.6. Determination of average emissions for a single regenerative system shall be calculated according to paragraph 3.3. of this annex and for multiple regeneration systems according to paragraph 3.4. of this annex.
              3.1.2. The loading process and Ki determination shall be made during the Type I operating cycle, on a chassis dynamometer or on an engine test bench using an equivalent test cycle. These cycles may be run continuously (i.e. without the need to switch the engine off between cycles). After any number of completed cycles, the vehicle may be removed from the chassis dynamometer, and the test continued at a later time.
              3.1.3. The number of cycles (D) between two cycles where regeneration phases occur, the number of cycles over which emissions measurements are made (n), and each emissions measurement (M'sij) shall be reported in Annex 1, items 4.2.11.2.1.10.1. to 4.2.11.2.1.10.4. or 4.2.11.2.5.4.1. to 4.2.11.2.5.4.4. as applicable.
              3.2. Measurement of emissions during regeneration
              3.2.1. Preparation of the vehicle, if required, for the emissions test during a regeneration phase,