| 摘要 |
PROBLEM TO BE SOLVED: To protect an injector drive element when a control unit terminal gets in contact with a negative or positive potential of a battery. SOLUTION: This device is provided with a boost circuit 100, an injector control circuit 200, a gate drive logic circuit 300, a high voltage output current processing circuit 400 to detect an output current 100B of the boost circuit 100, a battery output current processing circuit 500 to detect an output current 1B of a battery 1, and an energization current processing circuit 600 to detect an injector current 70A. When an output of at least one of the high voltage output current processing circuit 400, the battery output current processing circuit 500, and the energization current processing. circuit 600 exceeds a set value in the period of an injection signal outputted from the control circuit 200, FETs 10, 20, and 40 are put off in the whole range of the injection signal period at the timing and on.
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