BS ISO 20762:2018 pdf download

BS ISO 20762:2018 pdf download.Electrically propelled road vehicles — Determination of power for propulsion of hybrid electric vehicle
1 Scope
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.
NOTE ISO 1585 and UN Regulation No. 85, for example.
This document applies only to the vehicles with the following characteristics:
— HEVs with an internal combustion engine (ICE) and one or more electric motors powered by one or more rechargeable energy storage systems (RESS) for propulsion;
— vehicles classified as passenger cars or light duty trucks.
This document does not apply to fuel cell vehicles.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
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
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1585, ISO 23274 (all parts),
ISO/TR 8713 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1 hybrid-electric vehicle
HEV
vehicle with both a rechargeable energy storage system (3.3) and a fuelled power source for propulsion
6.4 Preparation of measurement devices
The measurement devices shall be installed at suitable position(s) and warmed up as appropriate. Specifically for TP2, the gearbox output shaft(s) or the driven wheel(s) shall be prepared with appropriate, calibrated torque and rotational speed measurement device(s). For a driven axle powered via differential and two wheels, it is sufficient to install only one torque and rotational speed measurement device on a drive shaft or wheel. In this case, the measured torque at a drive shaft or wheel shall be multiplied by 2 in order to get the sum of torque per driven axle. NOTE The torque and rotational speed measurement devices can be substituted by traction force and speed measured by the chassis dynamometer, if the accuracy of this measurement devices fulfil the same requirements as for the drive shaft or wheel measurement devices. If so, it is necessary that the measured values for traction force and speed be transformed, by calculation, to the required values for torque and rotational speed at drive shaft or wheel taken into account the specific data of the tires and the proportional vehicle weight at the wheels used during the test (e.g. rolling friction losses, dynamic rolling radius).