Enhancement of Hybrid Electric Vehicle Powertrain Performance

Abstract

The article deals with the selection of optimal parameters of hybrid electric vehicle power sources. Construction of a hybrid electric vehicle with buffer energy storage based on double electric layer capacitors considers choosing minimal sufficient capacity of the storage.Required buffer storage capacity depends on the vehicle’s driving cycle. If it moves in cycle with the average power (the ratio of energy consumption to the duration of the cycle) higher than power of primary energy source, it means that missing energy would be drawn from the buffer storage and long-time moving in this cycle would discharge it. To avoid the case, the power of primary source and the capacity of buffer storage should be chosen in coordination.In the article the primary source power ensuring any driving cycle implementation with minimal storage capacity is calculated. It may be further reduced taking into account real driving cycles. A technique of selecting the combination of primary source power and buffer storage capacity based on numerical modeling of energy consuming process is proposed.