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:
Aug. 24, 2021
Filed:
Dec. 20, 2017
Hitachi Automotive Systems, Ltd., Hitachinaka, JP;
HITACHI AUTOMOTIVE SYSTEMS, LTD., Hitachinaka, JP;
Abstract
Provided is a control device of a fuel injection device which can stabilize a behavior of a valve even when a voltage of a voltage source varies, and can reduce a deviation of an injection amount. A control deviceof a fuel injection deviceincludes a valve, a coilwhich generates a magnetic attraction force to attract a movable memberwhich drives the valve, and a voltage source. The fuel injection deviceapplies a voltage to the coilon the basis of an injection pulse, causes a drive current to flow to the coiluntil the current becomes a maximum current to attract the movable member, and drives the valveto inject fuel. The drive current flowing to the coilor a voltage of the voltage source is detected before the injection pulse is stopped. In a case where the detected drive current or the voltage is equal to or less than a setting, a width of the injection pulse or an injection pulse different from the injection pulse is corrected to be long.