Abstract:Electronic throttle is a very important device of vehicle engine, in order to improve automotive dynamics, drivability, fuel economy and to reduce emissions, it has been widely applied in automotive engines. Electronic throttle is a typical non-linear system, combined with the characteristics of electronic throttle structure, dynamic simulation model was established in MATLAB/Simulink platform, and the mathematical model of the throttle controller was established, electronic throttle controller based on sliding mode control was designed, and the results were compared with PID. The results show that the sliding mode control can overcome the nonlinear and uncertainty, when the throttle opening has a step change from small to large, the overshoot is little and the steady-state error is small, and the expected throttle degrees is obtained quickly.