DEVICE FOR MONITORING TEMPERATURE CHANGE OF SOLENOID COIL, REDUCING HEATING VALUE OF SHUNT RESISTANCE

摘要

PURPOSE: A device for monitoring the temperature change of a solenoid coil is provided to reduce the size of an ABS(Anti-lock Brake System) control block and to cut down the manufacturing cost by reducing heating value of a shunt resistance. CONSTITUTION: A temperature change monitoring device of solenoid coils(L1¯L8) for monitoring the voltage change of the solenoid coil by applying predetermined direct current power to the solenoid coil in a solenoid valve regulating the pressure of brake fluid supplied to a wheel cylinder of the vehicle is composed of a detecting unit(R1) for sensing voltage divided by the solenoid coil; a preventing unit(D1) for restricting operation power(B+) from flowing into the direct current power in operating the solenoid coil; and a microcomputer for monitoring temperature change according to the resistance change of the solenoid coil corresponding to a voltage signal output from the detecting unit. The detecting unit is a shunt resistance. The preventing unit is an inverse-current preventing diode. The operation power is battery power.