An instantaneous model and its implementation in speed regulator for HEV engine

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 speed governor 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.