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ISO 23274-2 1st Edition, August 1, 2012 Hybrid-electric road vehicles - Exhaust emissions and fuel consumption measurements - Part 2: Externally chargeable vehicles
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Availability date: 07/13/2021
Description / Abstract:
This part of ISO 23274 specifies a chassis dynamometer test
procedure to determine the end of CD (charge-depleting) state and
consumed electric energy during CD state.
The identification of the end of CD state is an important step
for procedures to determine exhaust emissions and fuel consumption.
Final determination of exhaust emissions and fuel consumption is
not included in this part of ISO 23274.
This part of ISO 23274 applies to vehicles with the following
characteristics.
— The vehicles are hybrid-electric road vehicles (HEV) with an
internal combustion engine (ICE) and the on-board rechargeable
energy storage system (RESS) for vehicle propulsion which is
supplied by electric energy from the stationary external power
source.
— A CD state, in which the electric energy in RESS from the
stationary external power source is consumed, is followed by a CS
(charge-sustaining) state in which the fuel energy is consumed
sustaining the electric energy of the RESS.
— Only batteries are assumed as the RESS of a vehicle.
— The RESS is not charged while driving unless by regenerative
braking and/or by generating by ICE.
NOTE 1 Trolleybuses and solar powered vehicles are not included
in the scope.
— The vehicle is classified as a passenger car or light duty
truck, as defined in each regional annex.
— Only liquid fuels (for example, gasoline and diesel fuel) are
used.
NOTE 2 In the case of vehicles with ICE using other fuel [for
example, compressed natural gas (CNG), hydrogen (H2)],
this part of ISO 23274 can apply except the measurement of consumed
fuel; otherwise the measurement method for those using the
corresponding fuel can apply.