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A Torque Control Strategy With Charge Buffer for Parallel Hybrid Electric Vehicle

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Executive Summary

As a new kind of vehicles with low fuel cost and low emission, Hybrid Electric Vehicle (HEV) has been given more and more attention in recent years. The key technique in the HEV is the optimal control strategy for the best performance. This paper proposed a new Torque Control Strategy with Charge Buffer (TCSCB) to control the two power sources of the HEV. The TCSCB is based on the control of engine torque which make the control strategy easily distribute the output power to the engine and motor. In this control strategy, the real time optimization based on the engine efficiency map increases engine efficiency observably. The charge buffer reduces the dramatic fluctuation of the engine torque to improve the fuel economy.

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