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:
Apr. 12, 2022
Filed:
Feb. 04, 2019
Hitachi Automotive Systems, Ltd., Hitachinaka, JP;
Toshihiro Aono, Tokyo, JP;
Motoyuki Abe, Tokyo, JP;
Ryo Kusakabe, Tokyo, JP;
Teppei Hirotsu, Tokyo, JP;
Ayumu Hatanaka, Tokyo, JP;
Hideyuki Sakamoto, Hitachinaka, JP;
Takao Fukuda, Hitachinaka, JP;
Masahiro Toyohara, Hitachinaka, JP;
Osamu Mukaihara, Hitachinaka, JP;
Hitachi Astemo, Ltd., Hitachinaka, JP;
Abstract
An electromagnetic valve control unit for detecting operation of an electromagnetic valve on the basis of a drive voltage or a drive current applied to the electromagnetic valve. The electromagnetic valve control unit includes an A/D converter, a filter, and a detection unit. The A/D converter converts the drive voltage or the drive current into a digital signal. The filter has a gain of about zero at a predetermined frequency. The detection unit detects operation of the electromagnetic valve on the basis of an output of the filter upon input of the digital signal into the filter.