The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 20, 2022
Filed:
Aug. 18, 2021
Hitachi Astemo, Ltd., Hitachinaka, JP;
Nuvoton Technology Corporation Japan, Nagaokakyo, JP;
Motoaki Kato, Hitachinaka, JP;
Atsushi Ogawa, Hitachinaka, JP;
Kengo Nomura, Hitachinaka, JP;
Keisuke Kuroda, Osaka, JP;
HITACHI ASTEMO, LTD., Ihitachinaka, JP;
NUVOTON TECHNOLOGY CORPORATION JAPAN, Nagaokakyo, JP;
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.