Design of Throttle Governing System Based on Stepper Motor

A diesel engine speed governing system using two-phase hybrid step motor as its actuator was designed,which can strengthen functions and improve performance of speed regulation.The system used digital signal controller dsPICF4012 as the processor,and TC4424 as the step motor integrated power driver.The system employed a control strategy of varying subdivision to adjust the fuel supply.The experimental results show that the system designed can achieve effective regulation of the amount of oil supplied under different conditions through the precise control of the step motor,which has a number of advantages,such as simple structure,more complete functional,short time for development.This system is suitable for the upgrade of diesel throttle governing system.