Patent ID: 6012437
Filing Date: 2000-01-11
Classification: F02D,Y02T

Abstract:
A control (60) for an exhaust gas recirculation (EGR) valve (24) comprising:an actuator (16) for moving the EGR valve (24) between a closed position and an open position;a position sensor (48) for detecting the position of the EGR valve (24) and generating a position output signal;a processing circuit (70,72) coupled to said actuator (16) and said position sensor (48), said processing circuit (70,72) receiving said position output signal and transmitting electrical control signals to said actuator (16) for energizing said actuator (16) and moving the EGR valve (24); andwherein, when the EGR valve (24) is moving towards the closed position, said processing circuit (70,72) transmitting first electrical control signals for energizing said actuator (16) in a first predetermined manner when said position output signal indicates that the EGR valve (24) is at least a predetermined distance away from the closed position, said processing circuit (70,72) transmitting second electrical control signals for energizing said actuator (16) in a second predetermined manner when said position output signal indicates that the EGR valve (24) is less than said predetermined distance away from the closed position.