Abstract: Provided is a rotation angle detection device, having a magnet installed on a valve shaft, which magnetically detects a rotation angle of a valve shaft, the device being configured to include a plate member having a predetermined thickness which is fastened and fixed to one end of the valve shaft, wherein the magnet is molded to the plate member into a cylindrical shape having a height larger than the predetermined thickness.

Abstract: Provided is a rotation angle detection device, having a magnet installed on a valve shaft, which magnetically detects a rotation angle of a valve shaft, the device being configured to include a plate member having a predetermined thickness which is fastened and fixed to one end of the valve shaft, wherein the magnet is molded to the plate member into a cylindrical shape having a height larger than the predetermined thickness.

Abstract: A fast idle air amount control system in a side stand-equipped two-wheeled motor vehicle is provided in which a bypass control valve (10) is arranged so that an axis (Y) of the bypass control valve (10) is substantially horizontal along the lateral direction of a two-wheeled motor vehicle (M) when the two-wheeled motor vehicle (M) is in an upright state and slopes downward toward a side stand (41) side when the two-wheeled motor vehicle (M) is put in an inclined parked state by standing it on the side stand (41), and an actuator (25), which is electrically operated, is coupled to an end part of the bypass control valve (10) on a side opposite to the side stand (41).

Abstract: The invention aims to prevent the dust passing through a gap provided for sliding movement of bypass valve from being attached to a screw mechanism, and thus to guarantee smooth motion of the screw mechanism. Provided is a bypass-intake-flow control apparatus including a throttle body in which a bypass and a valve hole that is open into the course of the bypass are formed. A bypass valve to open and close the bypass is slidably but not rotatably fitted into the valve hole. An actuator is attached to the throttle body with an output shaft arranged coaxially with the bypass valve. The screw mechanism links the output shaft and the bypass valve. A bottomed hollow portion is formed in the bypass valve with an opening facing the actuator. A dust cover that surrounds the screw mechanism in the hollow portion is attached to the throttle body.

Abstract: A fast idle air amount control system in a side stand-equipped two-wheeled motor vehicle is provided in which a bypass control valve (10) is arranged so that an axis (Y) of the bypass control valve (10) is substantially horizontal along the lateral direction of a two-wheeled motor vehicle (M) when the two-wheeled motor vehicle (M) is in an upright state and slopes downward toward a side stand (41) side when the two-wheeled motor vehicle (M) is put in an inclined parked state by standing it on the side stand (41), and an actuator (25), which is electrically operated, is coupled to an end part of the bypass control valve (10) on a side opposite to the side stand (41).

Abstract: The invention aims to prevent the dust passing through a gap provided for sliding movement of bypass valve from being attached to a screw mechanism, and thus to guarantee smooth motion of the screw mechanism. Provided is a bypass-intake-flow control apparatus including a throttle body in which a bypass and a valve hole that is open into the course of the bypass are formed. A bypass valve to open and close the bypass is slidably but not rotatably fitted into the valve hole. An actuator is attached to the throttle body with an output shaft arranged coaxially with the bypass valve. The screw mechanism links the output shaft and the bypass valve. A bottomed hollow portion is formed in the bypass valve with an opening facing the actuator. A dust cover that surrounds the screw mechanism in the hollow portion is attached to the throttle body.