Electric throttle control system with two-spring failsafe mechanism

The present invention relates to an electronic throttle control system having a housing (22) with a motor (40), throttle valve (60), gear mechanism (100), and failsafe mechanism (130). A spring member (150) attached between the housing (22) and a gear member (104) attached to the throttle valve shaft (62) biases the throttle plate (60) towards the closed position. A spring-biased plunger member (134) biases the throttle plate (60) from its closed position to a default or "limp-home" position.