| 摘要 |
PROBLEM TO BE SOLVED: To provide a solenoid valve driving device capable of properly performing brake control of a vehicle even if there is occurring a leak current of magnitude less than a minimum current value which a current monitor can monitor.SOLUTION: If a leak current of energization to an air solenoid 7a1, which is caused by leakage of a solenoid driver 14 controlled in ON/OFF or by shortage of wiring, has magnitude which cannot be detected by a current monitor 17, it is impossible to detect the leak current and determine a leak failure. When, based on signals from various sensors, an ECU determines stopping of solenoid valve driving control, a microcomputer 11 OFF-controls the solenoid driver 14 and ON-controls a solenoid relay 15. With this, there is no supply current to the air solenoid 7a1, a current value of the air solenoid 7a1 becomes below a return current value, and an air valve becomes a closed state, so that the solenoid valve driving control can be surely stopped.SELECTED DRAWING: Figure 2 |
