Throttle valve actuating apparatus for use in internal combustion engine

摘要

In a throttle valve actuating apparatus, a return spring member is arranged between one side face of a throttle valve main body and an acceleration drum member. The return spring member includes two coil spring members. One collar member is arranged at a side of a throttle valve main body, and another collar member is arranged at an acceleration drum member. The two collar members are provided directly and independently surrounding a throttle valve shaft and are set for positioning the shaft. The movement of the return spring member is restrained by the two collar members. The return torque due to the return spring member can be transmitted smoothly.