Invention Grant
- Patent Title: Fuel injection control device for internal combustion engine
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Application No.: US15501523Application Date: 2015-07-14
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Publication No.: US10197002B2Publication Date: 2019-02-05
- Inventor: Makoto Tanaka
- Applicant: DENSO CORPORATION
- Applicant Address: JP Kariya
- Assignee: DENSO CORPORATION
- Current Assignee: DENSO CORPORATION
- Current Assignee Address: JP Kariya
- Agency: Nixon & Vanderhye P.C.
- Priority: JP2014-160086 20140806
- International Application: PCT/JP2015/003555 WO 20150714
- International Announcement: WO2016/021122 WO 20160211
- Main IPC: F02D41/00
- IPC: F02D41/00 ; F02D41/24 ; F02D41/20 ; F02M51/06 ; F02D41/40 ; F02D41/14

Abstract:
An engine includes a fuel injector. The fuel injector includes a valve body and an electromagnetic part that moves by energizing the valve body from a valve-closed position to a valve-open position. The fuel injector injects fuel when the valve body is moved to the valve-open position. In fuel injection, an ECU feeds a pre-charge current smaller than a current for operating the valve body, to the electromagnetic part in a pre-charge period at the beginning of a start of energization, and subsequently feeds a drive current for operating the valve body, to the electromagnetic part. Further, the ECU acquires a current change parameter as a parameter correlated with a speed of a rising change in drive current, and controls the feed of the pre-charge current to the electromagnetic part of the fuel injector, based on the acquired current change parameter.
Public/Granted literature
- US20170226950A1 FUEL INJECTION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE Public/Granted day:2017-08-10
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