Simulation research on the start-stop system of hybrid electric vehicle

When confronting the situation of temporary short stops such as waiting for traffic lights, the application of automatic start-stop function not only peels off the engine idle mode from start-and-stop mode, but also reduces fuel consumption. A control strategy of start-and-stop system of hybrid electric vehicle is proposed and analyzed in this paper. The modified engine model with start-stop control strategy is established. Simulations and the relevant data analysis show that under certain conditions, the proposed start-stop control strategy can control the start and stop of the vehicle based on the requirement of the driver and it especially performs well at distinguishing from a transient and continuous parking from idling. Data analysis also demonstrates that the vehicle with the modified engine could save around 15% fuel consumption .