Patent ID: 7171946
Filing Date: 2007-02-06
Classification: F02D

Abstract:
1. An electronic throttle control apparatus comprising a throttle valve that adjusts an amount of intake air sucked into an engine, a throttle opening sensor that detects an actual throttle opening position of said throttle valve, and a throttle actuator that includes a motor for driving said throttle valve and an intermediate opening position stopping mechanism for holding said throttle valve at an intermediate opening stopper position when said motor is not energized, said throttle actuator being controlled in a throttle opening feedback manner such that the actual throttle opening position detected by said throttle opening sensor coincides with a target throttle opening position, wherein during the throttle opening feedback control of said throttle actuator, when said throttle valve continues, for a predetermined period of time, a state in which the absolute value of an opening position deviation between said actual throttle opening position and said intermediate opening stopper position is less than or equal to a first predetermined value, and a state in which the absolute value of a control deviation between said target throttle opening position and said actual throttle opening position is larger than or equal to a second predetermined value, it is determined that said motor is in an open-circuit failure.