Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:9:p4
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 9 (pt 4/37)
Character Range: 1786366–1789511

test with opposite sign of the
              The set of measurements shall fulfil the following criteria:
                  (a) The set shall contain at least one test with  and at least one test with .  is the sum of electric energy changes of all REESSs of test n calculated according to paragraph 4.3. of this annex.
                  (b) The difference in  between the test with the highest negative electric energy change and the test with the highest positive electric energy change shall be greater than or equal to 5 g/km. This criterion shall not be applied for the determination of Kfuel,FCHV.
                  In the case of the determination of KCO2, the required number of tests may be reduced to three tests if all of the following criteria are fulfilled in addition to (a) and (b):
                  (c) The difference in  between any two adjacent measurements, related to the electric energy change during the test, shall be less than or equal to 10 g/km.
                  (d) In addition to (b), the test with the highest negative electric energy change and the test with the highest positive electric energy change shall not be within the region that is defined by:
                          ,
                  where:
                      is the energy content of the consumed fuel calculated according to paragraph 1.2. of this appendix, Wh.
                  (e) The difference in  between the test with the highest negative electric energy change and the mid-point, and the difference in  between the mid-point and the test with the highest positive electric energy change shall be similar and preferably be within the range defined by (d). If this requirement is not feasible, the responsible authority shall decide if a retest is necessary.
              The correction coefficients determined by the manufacturer shall be reviewed and approved by the responsible authority prior to their application.
              If the set of at least five tests does not fulfil criterion (a) or criterion (b) or both, the manufacturer shall provide evidence to the responsible authority as to why the vehicle is not capable of meeting either or both criteria. If the responsible authority is not satisfied with the evidence, it may require additional tests to be performed. If the criteria after additional tests are still not fulfilled, the responsible authority shall determine a conservative correction coefficient, based on the measurements.
              2.3. Calculation of correction coefficients  and
              2.3.1.  Determination of the fuel consumption correction coefficient
              For NOVC-FCHVs and OVC-FCHVs, the fuel consumption correction coefficient , determined by driving a set of charge-sustaining Type 1 tests, is defined using the following equation:
              where:
                      is the fuel consumption correction coefficient, (kg/100 km)/(Wh/km);
                      is the charge-sustaining electric energy consumption of test n based on the REESS depletion according to the equation below, Wh/km
                      is the mean charge-sustaining electric energy consumption