Modeling and simulating the fuel film dynamic characteristic in intake pipe of automobile gasoline engine under transient condition

The transient characteristic of the air fuel ratio in gasinoline cylinder by Aquino's model is analyzed.A new dynamic fuel film model is presented,in which the transient airflow in intake pipe is considered.The variable of air fuel retia based on Aquino and preserted model and simulated by Simulink,under the two different trensierl conditions of gasoline engine.Also the simuleted results are inspected with experimental data of gasoline engine.Figures show that the dynamicl cheractertstics of intake pipe fud film can be accurately described by the presented model,and the model accuracy is higher than that of Aquino model.