Patent ID: 9482188
Filing Date: 2016-11-01
CPC Classification: F02M

Claim Text:
1. A valve apparatus comprising: a valve that is closable, wherein the valve opens or closes a passage; an opening degree sensor that senses an opening degree of the valve; an electric actuator that drives the valve with an electric motor, which generates a rotational output when the electric motor is energized; a control device that executes a feedback control operation of the electric motor such that when the valve, which is in a valve open state, is fully closed, a sensed opening degree of the valve, which is sensed with the opening degree sensor, approaches a target opening degree, which is set for a time of fully closing the valve, wherein the control device stops the energization of the electric motor after reaching of the sensed opening degree of the valve, which is sensed with the opening degree sensor, to an energization stop opening degree, which is set on a valve opening side of a full closing degree of the valve in a valve opening direction of the valve; a return spring that urges the valve in a valve closing direction of the valve; and a mechanical stopper that mechanically stops the valve at the full closing degree, wherein the target opening degree, which is set for the time of fully closing the valve, is set on a valve closing side of the energization stop opening degree in the valve closing direction; the valve opening side of the full closing degree of the valve is defined as a positive side, and a valve closing side of the full closing degree of the valve, which is opposite from the valve opening side of the full closing degree of the valve in the valve closing direction, is defined as a negative side; and the target opening degree, which is set for the time of fully closing the valve, is set to be on the negative side of the full closing degree of the valve.