Patent ID: 6912994

Claim:
An electronically controlled throttle control apparatus comprising: a throttle valve which controls an intake air flow in a bore of a throttle body; a throttle shaft which rotates integrally with the throttle valve; a drive motor with a motor shaft which is parallel to an axis of the throttle shaft; a transmission system which has a valve-side gear fixed to one end of the throttle shaft, a motor-side gear fixed to one end of the motor shaft, an intermediate shaft parallel to an axis of the motor shaft, and an intermediate gear which lies between the valve-side gear and the motor-side gear and rotates around the intermediate shaft for transmitting a torque of the drive motor to the throttle shaft; a gear case which is integrally formed on an outer wall surface of the throttle body and rotatably houses therein the valve-side gear, the motor-side gear and the intermediate gear; and a full close stopper and a full open stopper integrally formed on the valve-side gear, wherein at least the throttle shaft, the intermediate shaft and the motor shaft are in alignment with each other in the gear case, wherein components in the gear case are in alignment with a longitudinal centerline of the gear case, or symmetric in shape with respect to the longitudinal centerline of the gear case, or symmetric in position with respect to the longitudinal centerline of the gear case, wherein the components inside the gear case include a full close position stopper for defining a full close position of the throttle valve by hooking the full close stopper, and first and second full open position stoppers for defining the full open position of the throttle valve by hooking the full open stopper, wherein the full close position stopper is in alignment with a transverse centerline of the gear case, and wherein the first and second full open position stoppers are symmetric in shape with respect to the longitudinal centerline of the gear case, or symmetric in position with respect to the longitudinal centerline of the gear case.