A transient dynamic model for HEV engine and its implementation for fuzzy-PID governor

In this paper, a transient dynamic model is proposed for the hybrid electric vehicle (HEV) engine for the purpose of alleviation of high frequency oscillations in engine revolutions, which is extended to develop a digital governor providing a high fidelity estimation of rotary speed oscillation for hybrid vehicle engines. To damp speed oscillation, a hybrid fuzzy-PID controller is implemented for HEV engine speed regulation. By comparison between measured and estimated signals, it is demonstrated that a good agreement has been achieves and the governor behaves an excellent damping speed ripple.