Fuzzy modeling of diesel engine based on working position

The paper deals with a problem of nonlinear modeling of diesel engine. A nonlinear fuzzy model based on working position of diesel engine is proposed. The angular velocity of the engine was divided to several segments. For every area, a three-order equivalent linear model was identified with the Correlation Analysis-Least Square method. On the basis of the parameter of linear model, the fuzzy rules were founded. The identification results indicate that the fuzzy modeling method is effective and the nonlinear model is accurate. This nonlinear model can be used to design the control system of diesel engine, and understand its complex dynamics.