Determination of faults in solenoid valve e.g. for vehicle electronic braking control system

摘要

The system has a point for a test input and has a current limiter 21 and diode 22 coupled to the solenoid valve coil 3 that has a relay 2 connected to the vehicle battery 1. The switch is controlled by a signal from the microcomputer 7. A second switch 4 in the form of an FET is also controlled by the microcomputer and battery, relay and solenoid faults can be identified.