FAILURE SENSING DEVICE OF VEHICLE, FOR DETECTING BREAKAGE OF WHEEL SPEED SENSOR AND BRAKE HYDRAULIC CONTROL VALVE DRIVING DEVICE BY ONE MICROCOMPUTER

摘要

PURPOSE: A failure sensing device of a vehicle is provided to improve the performance of a brake and stability of the vehicle by detecting a wrong operation of a device for driving a brake hydraulic pressure control valve. CONSTITUTION: A failure sensing device of a vehicle is composed of a solenoid valve(10) for controlling hydraulic pressure of a brake; a switching unit(20) for opening the solenoid valve according to a driving signal from the outside; a reference pulse generating unit(40) for generating digital reference pulse; a counter unit(30) for counting the reference pulse while the driving signal is input; and a control unit(60) for outputting the driving signal and deciding a wrong operation of the switching unit according to an output signal of the counter unit. The control unit decides that the switching unit malfunctions if the number of the reference pulses output from the counter unit is smaller than pre-set numbers.