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:
Feb. 06, 2007
Filed:
Jun. 19, 2006
Takahiko Oono, Tokyo, JP;
Takahiko Oono, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A high-pressure fuel pump control device for an internal combustion engine includes a feedback quantity calculating unit () for calculating a fuel discharge feedback quantity (QFB) of a high-pressure pump according to a proportional integral operation based on a pressure deviation (ΔPF) between a target pressure (PO) and a fuel pressure (PF), a flow control valve controlling unit () for setting drive timing (TD) of a flow control valve () on the basis of a target fuel discharge quantity (QO), and an integral operation update prohibiting unit for prohibiting, when the number of times of calculation of the fuel discharge feedback quantity (QFB) reaches a first predetermined number of times while a sign of the pressure deviation (ΔPF) does not invert, update of an integral operand (QFBI), and for resuming, when the sign of the pressure deviation (ΔPF) inverts thereafter, the update of the integral operand (QFBI).