Study on engine start-stop control strategy for series-parallel hybrid vehicle

This paper is aimed to study on engine start-stop control strategy in series-parallel hybrid system. Firstly, working principle of hybrid vehicle is introduced, especially on series-parallel hybrid system and engine start-stop technology. Secondly, control algorithm of engine start-stop is developed; we discuss different transition conditions in engine states. The control algorithm is validated on a hybrid electric vehicle, and test results show that the engine can start or stop rightly when conditions satisfy, and engine also works in the high efficiency area.