TOP MENUWhat are Charge Depleting mode and Charge Sustaining mode? |
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■What are Charge Depleting mode and Charge Sustaining mode
CD (Charge Depleting) mode and CS (Charge Sustaining) mode are driving modes used in fuel economy/CO2/driving range certification tests for electric vehicles (BEVs) and hybrid electric vehicles (HEVs).
In CD mode, the vehicle runs on only the battery charged by external power, while in CS mode the vehicle runs with the battery level (SOC: State of Charge) maintained by generating electricity from the engine (the engine is also running).
The following is an image of how SOC changes during CD/CS mode. ■Charge Depleting mode details
Details of the CD mode are as follows: After preconditioning ⇒ charging ⇒ soaking (6 to 36 hours, varies by country), the driving test begins.
The driving test mode also varies by country, with Japan/EU using the WLTC mode.
In the US, fuel economy/CO2/cruising distance are calculated by combining the results of driving using the 2-cycle method ( FTP, HWY) or 5-cycle method (FTP, HWY, US06, SC03, Cold FTP cycle).
Driving is repeated in each cycle until the CD mode ends, and this is performed for all cycles.
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