Division 2.3.1 Determination of the fuel consumption correction coefficient Kfuel,FCHV

For NOVC-FCHVs, the fuel consumption correction coefficient K_fuel,FCHV, determined by driving a set of charge-sustaining Type 1 tests, is defined using the following equation:

K_{fuel,FCHV} = \frac{\sum_{n_{CS}}^{n = 1} (({EC}_{DC,CS,n} - {EC}_{DC,CS,avg}) \times ({FC}_{CS,nb,n} - {FC}_{CS,nb,avg}))}{\sum_{n_{CS}}^{n = 1} {({EC}_{DC,CS,n} - {EC}_{DC,CS,avg})}^{2}}

where:

K_fuel,FCHV

is the fuel consumption correction coefficient, (kg/100 km)/(Wh/km);

EC_DC,CS,n

is the charge-sustaining electric energy consumption of test n based on the REESS depletion according to the equation below, Wh/km

EC_DC,CS,avg

is the mean charge-sustaining electric energy consumption of n_cs tests based on the REESS depletion according to the equation below, Wh/km;

FC_CS,nb,n

is the charge-sustaining fuel consumption of test n, not corrected for the energy balance, according to Table A8/7, step no. 1, kg/100 km;

FC_CS,nb,avg

is the arithmetic average of the charge-sustaining fuel consumption of n_cs tests based on the fuel consumption, not corrected for the energy balance, according to the equation below, kg/100 km;

is the index number of the considered test;

n_cs

is the total number of tests;

and:

{EC}_{DC,CS,avg} = \frac{1}{n_{cs}} \times \sum_{n_{cs}}^{n = 1} {EC}_{DC,CS,n}

and:

{FC}_{CS,nb,avg} = \frac{1}{n_{cs}} \times \sum_{n_{cs}}^{n = 1} {FC}_{CS,nb,n}

and:

{EC}_{DC,CS,n} = \frac{{ΔE}_{REESS,CS,n}}{d_{CS,n}}

where:

ΔE_REESS,CS,n

is the charge-sustaining REESS electric energy change of test n according to paragraph 1.1.2. of this Appendix, Wh;

d_CS,n

is the distance driven over the corresponding charge-sustaining Type 1 test n, km.

The fuel consumption correction coefficient shall be rounded to four significant figures. The statistical significance of the fuel consumption correction coefficient shall be evaluated by the approval authority.