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:
Apr. 30, 2002
Filed:
May. 23, 2000
Hiromichi Hisato, Hyogo, JP;
Takeshi Kitao, Hyogo, JP;
Takahiko Ono, Hyogo, JP;
Keiichi Enoki, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A device for controlling the fuel pressure in a direct cylinder fuel injection engine, which suppresses the over-shooting or under-shooting of fuel pressure under a condition in which the fuel pressure is changing, in order to improve the response and stability. A control means A controls the fuel pressure by feedback so that a real fuel pressure PF comes into agreement with a target fuel pressure PFo, and includes a means for operating the fuel pressure correction amount for variably setting a control gain for controlling the fuel pressure by feedback, the means for operating the fuel pressure correction amount so working as to change the control gain when the target fuel pressure has changed by more than a predetermined amount from a first control gain for when the fuel pressure remains steady over to a second control gain for when the fuel pressure changes.