BS ISO 20762:2018,Electrically propelled road vehicles — Determination of power for propulsion of hybrid electric vehicle.BS ISO 20762:2018 pdf free download here.
This document specifies measurement methods for the maximum system propulsion power of hybrid-electric vehicles (HEV).
The results can be compared with the data of internal combustion engine vehicles (ICEV) power measured with the relevant current method.
It is necessary for vehicle manufacturers to show the reasonable value of the power of hybrid-electric vehicle (HEV) system and compare it with the value of the internal combustion engine (ICE) power measured in the existing test methods such as ISO 1585 and UN Regulation No. 85. But at present, there is no international evaluation method for the power of HEV systems available.Vehicle manufacturers indicate the power of HEVs in their catalogues based on their individual calculation method. With the method in this document, it is possible to measure and compare the power of any HEV topology witl those of internal combustion engine vehicles (ICEV).
2 Normative references
ISO 1585, Road vehicles -Engine test code-Net power.
ISO 23274 (all parts),Hybrid-electric road vehicles-Exhaust emissions and fuel consumption measurements.
ISO/TR 8713, Electrically propelled road vehicles-Vocabulary.
Fans shall be used to cool the vehicle to maintain the proper operating temperature. However, excessive
cooling is prohibited. Air speed in front of the vehicle shall not be higher than the vehicle speed.
5.2.2 Measurement frequency
All the items in Table 1, except atmospheric pressure and room temperature, shall be measured and
recorded at a frequency of not less than 10 Hz.
The items atmospheric pressure and room temperature shall be at least recorded as single measurement
activity at start of vehicle operation (see 6.8.4) and after end of vehicle running (see 6.8.6)

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