Division 2.4.1.1 Transient (NRTC and LSI-NRTC) test cycles and RMC

Reference is made to points 2.1 and 2.2 for raw and diluted exhaust gas respectively. The resulting values for power P [kW] shall be integrated over a test interval. The total work W _act [kWh] is calculated by means of equation (7-59):

Where:

P_i

instantaneous engine power [kW]

n_i

instantaneous engine speed [rpm]

T_i

instantaneous engine torque [Nm]

W _act

actual cycle work [kWh]

ƒ

data sampling rate [Hz]

N

number of measurements [-]

F2Δ t _i

the measurement interval [s]

Where auxiliaries were fitted in accordance with Appendix 2 of Annex VI there shall be no adjustment to the instantaneous engine torque in equation (7-59). Where, according to points 6.3.2 or 6.3.3 of Annex VI to this regulation necessary auxiliaries that should have been fitted for the test are not installed, or auxiliaries that should have been removed for the test are installed, the value of T_i used in equation (7-59) shall be adjusted by means of equation (7-60):

Where:

T_{i ,meas}

measured value of instantaneous engine torque

T _{i, AUX}

corresponding value of torque required to drive auxiliaries determined in accordance with equation (6-18) of Annex VI.

The specific emissions e _gas [g/kWh] shall be calculated in the following ways depending on the type of test cycle.

Where:

m _gas

total mass of emission [g/test]

W _act

cycle work [kWh]

In case of the NRTC, for gaseous emissions other than CO₂ the final test result e _gas [g/kWh] shall be a weighted average from cold-start run and hot-start run by means of equation (7-62):

Where:

• m _cold is the gas mass emissions of the cold-start NRTC [g]

• W _{act, cold} is the actual cycle work of the cold-start NRTC [kWh]

• m _hot is the gas mass emissions of the hot-start NRTC [g]

• W _{act, hot} is the actual cycle work of the hot-start NRTC [kWh]

In case of the NRTC, for CO₂ the final test result e _CO2 [g/kWh] shall be calculated from the hot-start NRTC by means of equation (7-63):

Where:

• m _{CO2, hot} is the CO₂ mass emissions of the hot-start NRTC [g]

• W _{act, hot} is the actual cycle work of the hot-start NRTC [kWh]