DEVICE FOR DETECTING AND CORRECTING FAULTY DISCONFORMITY BETWEEN DESIRED AND ACTUAL POSITIONS OF A SERVO CONTROLLED REGULATING MEMBER

摘要

Device for detecting and correcting faulty disconformity between desired and actual positions of a servo controlled regulating member, particularly a butterfly valve (11) in the intake manifold system (12) of an internal combustion engine in a motor vehicle, has a microcomputer which detects a decrease in an actual position signal from a sensor (14, 15) responsive to the position of the butterfly valve in the absence of a decrease in a desired position signal from a sensor (19, 20) responsive to the position of an accelerator pedal (21), and controls actuating signals to the servo motor (13) in response to such detected decrease to cause the servo motor to move the butterfly valve (11) into the correct position smoothly and gradually whereby to avoid uncalled for increase in engine output following a temporary interruption of operation of the servo motor.