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. 28, 2001
Filed:
Jul. 13, 1998
Yoshiya Takano, Hitachinaka, JP;
Koji Matsufuji, Hitachinaka, JP;
Tohru Ishikawa, Kitaibaraki, JP;
Takao Teranishi, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A fuel pressure control apparatus for cylinder injection engine having a fuel injection valve for injecting fuel into a cylinder of an engine, a pipe for conducting the fuel to the fuel injection valve, a fuel pump for supplying the fuel from a fuel supply system to the pipe, a fuel pressure regulator for regulating the fuel pressure within the pipe by discharging the fuel from the pipe to the fuel supply system, and a control unit for making feed-back control on the fuel pressure within the pipe by applying a control signal determined on the basis of an engine operation parameter to the fuel pressure regulator, wherein the fuel pressure regulator is controlled in a feed-forward manner by a predetermined control value so as to make better fuel pressure control at the time of start and when the fuel pressure transiently changes.