Solenoid Valve Control Device for Electronically Controlled Fuel Injection System

摘要

The present invention is to reduce the unnecessary power consumption in opening and closing the solenoid valve of the fuel injection device, more specifically, the DC voltage or the duty ratio is applied by receiving the feedback current fed back from the command pulse and the current sensing unit. A microcomputer for outputting a PWM voltage, a power drive unit for controlling the intensity of a current flowing through the solenoid valve driving unit by applying a DC voltage or a PWM voltage output from the microcomputer, and a current flowing in the power drive unit according to the operation of the solenoid valve By sensing the current sensing unit to feed back to the microcomputer and the solenoid valve drive unit for opening and closing the solenoid valve by the control of the power drive unit, it is possible to reduce unnecessary power consumption while preventing the power transistor of the solenoid valve drive unit from overheating. will be.