| 摘要 |
PURPOSE: A solenoid valve driving device is provided to prevent a solenoid driving switch from being broken down by dark currents by bypassing the dark currents with back electromotive force generated by a solenoid coil. CONSTITUTION: A solenoid valve driving device is composed of a brake pressure-control solenoid valve having solenoid coils(L1¯L8) therein and opening or closing a brake fluid passage by operating a plunger according to electric currents flowing through the coils and a driving unit(30) for driving the solenoid valve. The driving unit comprises a fail safe switch(Q0) for cutting off the supply of power toward the solenoid coil; solenoid driving switches(Q1¯Q8) for switching the electric currents flowing through the solenoid coil; and at least one bypass unit(40) for bypassing the electric currents by back electromotive force generated by the solenoid coil in operating the fail safe switch.
|
