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:
Jan. 22, 2019
Filed:
Dec. 24, 2015
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Takashi Nomura, Isesaki, JP;
Koji Yuasa, Isesaki, JP;
HITACHI AUTOMOTIVE SYSTEMS, LTD., Hitachinaka-Shi, JP;
Abstract
A control unit () includes a microcontroller () that sets a duty ratio corresponding to a target current value of a linear solenoid () and an ASIC () that supplies electricity to the linear solenoid () based on the duty ratio. The microcontroller () includes a correction unit () that corrects a driving current value detected by a current sensor (). The ASIC () includes a correction unit () that corrects the driving current value detected by the current sensor (). A feedback amount selection unit () selects either one of the driving current value corrected by the correction unit () or the driving current value corrected by the correction unit () as a feedback amount corresponding to the target current value. A dual correction system is provided in a feedback control system.