Patent ID: 6546920
Filing Date: 2003-04-15
Classification: F02M,G05B

Abstract:
A controller for an exhaust gas recirculation valve adapted to open/close on torque balance between a return torque applied by pressing means in one direction selected from opening and closing directions of a control valve, and a motor torque applied by a DC motor in the opening or closing direction of the control valve, comprising:a PI controlled variable operation unit for receiving a deviation between input data indicative of a target opening/closing position of the control valve, and detection data indicative of a current opening/closing position of the control valve; a hysteresis correction unit for obtaining, a hysteresis correction quantity from an output quantity of the PI controlled variable operation unit; and a motor driving voltage conversion unit for receiving a sum of the output quantity of the PI controlled variable operation unit and the hysteresis correction quantity, and converting the result into a voltage to be supplied to the DC motor.