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. 19, 2022
Filed:
Jun. 11, 2019
Applicant:
Hitachi Automotive Systems, Ltd., Hitachinaka, JP;
Inventors:
Assignee:
HITACHI ASTEMO, LTD., Hitachinaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 7/06 (2006.01); F16K 31/06 (2006.01);
U.S. Cl.
CPC ...
H01F 7/064 (2013.01); F16K 31/0675 (2013.01);
Abstract
Provided is a solenoid valve drive device capable of accurately controlling a hysteresis value of a drive current for driving a solenoid valve. The solenoid valve drive device according to the present invention controls a set value of a hysteresis or a time width of the hysteresis based on a difference between an extreme value of the hysteresis in a peak hold period of a drive current and a set value of the extreme value.