Parameter Identification of Fuel Film Model Transient Condition for Gasoline Engine

A transient fuel film model is established by four-stroke gasoline engine as the research object. The recursive least square algorithm is used to identify parameters of the film. The simulation model of engine air-fuel ratio is established. The identified model is used to simulate transient operating conditions which are compared with the actual acquisition of the air-fuel ratio. The results show that identified parameters of the film can meet the requirements of actual control using recursive least squares algorithm.