Device and method for determining vehicle speed sensor fault for electronic coutrol system

Abstract

The detector set is in use for an electric control system. The electric control system possesses a speed sensor for vehicle. The speed sensor is in use for generating signal of speed information of vehicle. The detector set includes part for detecting operating condition of vehicle, sensor of brake gear, and part of fault detection. A fault signal is generated from the part of fault detection when following condition is met: if speed information of vehicle generated from the speed sensor for vehicle is smaller than or equal to a speed reference level stored in the part of fault detection, as well as information signal of operating condition generated at a prearranged time period exceeds reference level of operating condition stored in the part of fault detection, and brake gear is in OFF state.

Description

technical field [0001] The present invention relates to an electronic control system for a vehicle; and more particularly, to a vehicle speed sensor failure detection device and method for an electronic control system capable of avoiding electronic control failures caused by a failure of the vehicle speed sensor System miscontrol. Background technique [0002] In general, an electronic control system for a vehicle receives information from various sensors, processes the received information, and drives corresponding circuits and / or brakes so that appropriate control operations can be performed. There are various electronic control systems such as electronically controlled suspension, electronically controlled steering, ABS (anti-lock braking system), TCS (traction control system), ESP (electronic stability program), and the like. [0003] Specifically, in the electronic control system, since the means for determining the vehicle running state or the road surface condition o...

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Problems solved by technology

[0006] However, some diesel vehicles or systems do not have a throttle position sensor

In this case, because the electronic control system did not use the information from the throttle position sensor to determine the presence or absence of a vehicle speed sensor fault, it was incorrect to determine the presence or absence of a vehicle speed sensor fault, which resulted in Miscontrol in control operation of information electronic control system

[0007] Additionally, in some vehicles or systems, there may not be a gear position sensor provided to provide gear position information

In this case, because the electronic control system does not use the gear position information to determine whether the vehicle speed sensor failure exists, the determination of the presence or absence of the vehicle sensor failure is incorrect, which results in the electronic control system using the vehicle speed information Miscontrol in control operation

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