Division 5.3.1 Specific fuel consumption figures for WHTC correction factor

The specific fuel consumption figures needed for the WHTC correction factor shall be calculated from the actual measured values for the hotstart WHTC recorded in accordance with paragraph 4.3.3 as follows:

• SFC_{meas, Urban} = Σ FC_{meas, WHTC-Urban} / W_{act, WHTC-Urban}

• SFC_{meas, Rural} = Σ FC_{meas, WHTC- Rural} / W_{act, WHTC- Rural}

• SFC_{meas, MW} = Σ FC_{meas, WHTC-MW} / W_{act, WHTC-M})

where:

SFC_{meas, i}

Specific fuel consumption over the WHTC-sub-cycle i [g/kWh]

Σ FC_{meas, i}

Total fuel mass consumed by the engine over the WHTC-sub-cycle i [g] determined in accordance with paragraph 5.2

W_{act, i}

Total engine work over the WHTC sub-cycle i [kWh] determined in accordance with paragraph 5.1

The 3 different sub-cycles of the WHTC – urban, rural and motorway – shall be defined as follows:

1. (1)

   urban: from cycle start to ≤ 900 seconds from cycle start

2. (2)

   rural: from > 900 seconds to ≤ 1 380 seconds from cycle start

3. (3)

   motorway (MW): from > 1 380 seconds from cycle start to cycle end