Computer Simulation Development Of VGT Electronic Control Turbochargering Technology

Turbocharger Electronic control System may take full advantage of the exhaust gas energy of Diesel Engine and get over the problem in general gained press which is fall short of wrest rules in the time of low speed and the problem that the engine can't works with full capacity when in part load, the transient response remains slow, it can improve the capability of low speed at the same time high speed and heighten the power of the engine and improve the fuel economy and reduce the influence of pollution and yawp. The Variable Geometry Turbocharger Electronic control System has become the development direction of Turbocharger nowadays, in this paper ,the diesel engine of Turbocharger is the object of research, we set up the dynamic model of the Variable Geometry Turbocharger Electronic control diesel engine in MATLAB and study its capability and the means and parameter of control.In the first place ,we explain the matching between the VGT and the diesel engine and analyse between the parameter relation of engine and the nozzle area, then, we introduce the increment PID control method and MATLAB environment, at last ,a real time model for simulating transient conditions of vehicle turbocharged diesel engines has been presented to research and develop the electronic-controlled turbocharged diesel engines, the system is divided into four part, that is , compressor .engine ,variable geometry area ,and turbine from the viewpoint of system control, the time between two working cycles is taken as calculation time step, and the mean parameters of each working cycle as calculation purpose, the model has such advantages as shorter calculation time and better real time characteristics, the model is used to simulate the transient conditions of a vehicle turbocharged diesel engine with variable geometry area . the calculated results show that the calculation accuracy can meet the needs of real time transient modeling and may analyze simulation result which is very convenience, this is very instruct significance in the theory and appliance field of turbocharged diesel engine too.