Patent ID: 6843227

Claim:
An electronic throttle control system, comprising: an engine control unit, said engine control unit determining a target throttle position based on engine operating parameters; an accelerator pedal position sensor, said pedal position sensor sending a signal indicative of an accelerator pedal position to the engine control unit; a throttle control unit, said throttle control unit operating a throttle actuator according to a target throttle position signal from the engine control unit; a throttle valve positioned by the throttle actuator to the target throttle position; a connecting shaft fixedly connected to the throttle valve; a spring seat fixedly connected to the connecting shaft, wherein the spring seat has a circular plate shape; a first return spring, connected between the spring seat and throttle body, acting on the throttle valve in a closing direction; and a second return spring, connected between the spring seat and the throttle body, acting on the throttle valve in an opening direction, the first return spring and second return spring being positioned and configured to position the throttle valve at an emergency position if the throttle control system fails; wherein the first return spring and the second return spring are disposed on opposite sides of the spring seat.