Document ID: chunk:federal_register_of_legislation:F2022C00213:reg:120:p26
Version: federal_register_of_legislation:F2022C00213
Segment Type: reg
Provision Reference: reg 120 (pt 26/30)
Character Range: 429918–432915

used, if the technical service sees no reason that this value could be exceeded.

       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. Measurement of carbon dioxide emission and fuel consumption between two cycles where regenerative phases occur
       3.1.1. The average of carbon dioxide emission and fuel consumption 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 carbon dioxide emission and fuel consumption remain constant (+4 per cent) between regeneration phases.  In this case, the carbon dioxide emission and fuel consumption 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 6.  Determination of average emissions for a single regenerative system shall be 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 4.1.11.2.1.10.1. to 4.1.11.2.1.10.4. or 4.1.11.2.5.4.1. to 4.1.11.2.5.4.4. as applicable.
       3.2. Measurement of carbon dioxide emission and fuel consumption during regeneration

       3.2.1. Preparation of the vehicle, if required, for the emissions test during a regeneration phase, may be completed using the preparation cycles in paragraph 6.3. of Annex 4a of Regulation No. 83 or