Abstract:The paper designs the closed-loop control system for automotive electronic throttle valve opening which is based on LabVIEW 2010 platform. System uses NI high-speed M-Series USB-6251 data acquisition board to collect feedback voltage signal from the throttle position sensor and then outputs two complementary PWM signals to control DC motor which is in throttle body. System chooses PID control algorithm with integral separation, that is to say, when the throttle valve opening change is small,system uses PID algorithm, otherwise uses PD algorithm. Experiments show that system has the advantages of simple programming, convenient human-computer interaction, short development cycles and good closed-loop control, so this research has practical value in real life.