Patent ID: 7058490
Filing Date: 2006-06-06
Classification: G05B,G07C

Abstract:
1. A vehicle speed sensor failure detection apparatus for an electronic control system which has a vehicle speed sensor for detecting a vehicle speed of a vehicle and generating a vehicle speed information signal indicating vehicle speed information, comprising: a vehicle behavior detection portion for detecting a behavior of the vehicle and generating a vehicle behavior information signal indicating vehicle behavior information by using at least one of signals generated from a vertical acceleration sensor, a horizontal acceleration sensor, a steering angle sensor and a vehicle height sensor; a brake sensor for determining whether a brake of the vehicle is in an ON state or an OFF state and generating a brake state information signal indicating brake state information; and a failure detection portion for storing a vehicle speed reference level and a behavior reference level and receiving the vehicle speed information signal, the vehicle behavior information signal and the brake state information signal, wherein if the vehicle speed information is less than or equal to the vehicle speed reference level, the vehicle behavior information signal generated during a predetermined period of time includes a filtered portion exceeding the behavior reference level and the brake is in the OFF state, the failure detection portion generates a failure signal.