Electromagnetic valve driving device
AssigneesHitachi Astemo, Ltd., Nuvoton Technology Corporation Japan
InventorsMotoaki Kato, Atsushi Ogawa, Kengo Nomura, Keisuke Kuroda
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Abstract
An electromagnetic valve driving device which drives a fuel injection valve having a solenoid coil, includes: a regenerative switching element disposed between a first end portion of the solenoid coil and the ground; and a control unit configured to control the regenerative switching element to be in an ON state or an OFF state, wherein the control unit includes: a voltage detection unit configured to detect a voltage of the first end portion of the solenoid coil; and an abnormality detection unit configured to detect an abnormality of the regenerative switching element on the basis of the voltage detected by the voltage detection unit.
Claims6
An electromagnetic valve driving device which drives a fuel injection valve having a solenoid coil, comprising:
- a regenerative switching element disposed between a first end portion of the solenoid coil and a ground;
- and
- a control unit configured to control the regenerative switching element to be in an ON state or an OFF state,
- wherein the control unit includes:
- a voltage detection unit configured to detect a voltage of the first end portion of the solenoid coil;
- and
- an abnormality detection unit configured to detect an abnormality of the regenerative switching element on the basis of the voltage detected by the voltage detection unit.
Dependencies are inferred from the claim text.