DRIVING DEVICE FOR DUTY SOLENOID VALVE

PURPOSE:To eliminate the resistance of a large vessel for limiting current and to reduce a storage space by controlling a holding current by means of a chopping system. CONSTITUTION:A microcomputer 61 incorporates a pulse width modulation timer (PWM timer) 60 in addition to the constitution of a microcomputer of a conventional driving device. The holding current is switched to the chopping system of a first switch means 27 by a chopping driving pulse outputted from a chopping driving pulse generation means form a current limiting system by a resistance so as to control it. Thus, the resistance of the large vessel can be eliminated by simple circuit constitution and the storage space can be miniaturized.