Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:16:p94
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 16 (pt 94/108)
Character Range: 1153833–1157045

complete procedure (A to B, see Figure A6.App1/2), the original starting condition A should be reached again.
              3.3. Ki factors and Ki offsets shall be rounded to four places of decimal. For Ki offsets, the rounding shall be based on the physical unit of the emission standard value.

Annex B6 - Appendix 2

Test procedure for rechargeable electric energy storage system monitoring
              1. General
              In the case that NOVC-HEVs, OVC-HEVs, NOVC-FCHVs and OVC-FCHVs (as applicable) are tested, Appendices 2 and 3 to Annex B8 shall apply.
              This appendix defines the specific provisions regarding the correction of test results for CO2 emission as a function of the energy balance  for all REESSs.
              The corrected values for CO2 emission shall correspond to a zero energy balance (), and shall be calculated using a correction coefficient determined as defined below.
              2. Measurement equipment and instrumentation
              2.1. Current measurement
              REESS depletion shall be defined as negative current.
              2.1.1. The REESS current(s) shall be measured during the tests using a clamp-on or closed type current transducer. The current measurement system shall fulfil the requirements specified in Table A8/1. The current transducer(s) shall be capable of handling the peak currents at engine starts and temperature conditions at the point of measurement.
              In order to have an accurate measurement, zero adjustment and degaussing shall be performed before the test according to the instrument manufacturer's instructions.
              2.1.2. Current transducers shall be fitted to any of the REESS on one of the cables connected directly to the REESS and shall include the total REESS current.
              In case of shielded wires, appropriate methods shall be applied in accordance with the responsible authority.
              In order to easily measure REESS current using external measuring equipment, manufacturers should preferably integrate appropriate, safe and accessible connection points in the vehicle. If this is not feasible, the manufacturer shall support the responsible authority by providing the means to connect a current transducer to the REESS cables in the manner described above.
              2.1.3. The measured current shall be integrated over time at a minimum frequency of 20 Hz, yielding the measured value of Q, expressed in ampere-hours Ah. The integration may be done in the current measurement system.
              2.2. Vehicle on-board data
              2.2.1. Alternatively, the REESS current shall be determined using vehicle-based data. In order to use this measurement method, the following information shall be accessible from the test vehicle:
              (a) Integrated charging balance value since last ignition run in Ah;
                  (b) Integrated on-board data charging balance value calculated at a minimum sample frequency of 5 Hz;
                  (c) The charging balance value via an OBD connector as described in SAE J1962.
              2.2.2. The accuracy of the vehicle on-board REESS charging and discharging data shall be demonstrated