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:
Dec. 06, 2005
Filed:
Nov. 04, 2004
Ken Uchiyama, Toyoake, JP;
Ken Uchiyama, Toyoake, JP;
Denso Corporation, Kariya, JP;
Abstract
A fuel injection system for an internal combustion engine includes a fuel supply pump, a fuel pressure detector, and a control unit. The fuel supply pump supplies pressurized fuel to a fuel injection valve in the internal combustion engine. The fuel pressure detector detects the pressure of the fuel supplied. The control unit controls the amount of the fuel supplied based on a deviation between an actual fuel pressure and a target fuel pressure. The control unit includes an integral term calculator and an integral term holder. The integral term calculator adds an integral compensation quantity and a last-time integral term to calculate a this-time integral term based on an integral compensation quantity that is updated according to the deviation. The integral term holder stops the updating of the integral compensation quantity and retains the last-time integral term when a defect in the fuel supply pump is detected.