| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device for a fuel injection valve for stably injecting fuel even in voltage fluctuation of a battery and performing save operation in abnormality of an open/close element or an auxiliary power supply. SOLUTION: The control device comprises: the auxiliary power supply 6 boosting voltage of a main power supply 1; a first open/close element 20 for rapidly feeding from the auxiliary power supply 6 to an electromagnetic solenoid 27; a second open/close element 24 for continuously feeding from the main power supply 1 to the electromagnetic solenoid 27 and performing an ON/OFF control to maintain the feeding; a third open/close element 26 breaking these fed electric currents; and a control means controlling the feeding. Normally, the control device performs the feeding, in the order of the rapid feeding, continuous feeding, and maintained feeding. If any abnormality occurs in the auxiliary power supply, the rapid feeding and continuous feeding are performed for the save operation, if any abnormality occurs in the open/close element, operation of the system is stopped and the save operation is performed, and a minimum value of output voltage of the auxiliary power supply is set to be larger than a maximum value of the voltage of the main power supply, and boosting operation of the auxiliary power supply 6 is stopped during the rapid feeding. COPYRIGHT: (C)2004,JPO&NCIPI
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