A throttle valve control device for an internal combustion engine

摘要

A motor-driven throttle valve control device has a throttle shaft (2) and a coupling lever (5) rotatably provided on the shaft (2), both being coupled by a spring. There is provided a default spring (7) which energizes the coupling lever (5) toward a position of the default opening of the throttle valve (1). The throttle shaft (2) rotates separately from the coupling lever (5) in the direction of a full open of the throttle valve (1) from a point at which the coupling lever (5) comes into contact with a stopper (103) defining the default position, and together with the coupling lever (5) in the direction of a full close of the throttle valve (1) from the point. Thereby, the throttle valve (1) can be kept at the default position by the default spring (7) through the coupling lever (5), when a motor (4) driving the throttle valve (1) is not fed. <IMAGE>