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. 27, 2004
Filed:
Jan. 28, 2002
Kenji Hiraku, Chiyoda, JP;
Kenichiro Tokuo, Chiyoda, JP;
Tadahiko Nogami, Mito, JP;
Kunihiko Takao, Tsuchiura, JP;
Hiroyuki Yamada, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The unevenness of injection rates of cylinders is reduced in a fuel supply system of a direct injection engine which uses a variable-displacement single plunger pump. The unevenness of injection rates of cylinders can be reduced by effecting a control such that the cam , which drives the high-pressure fuel pump , makes one reciprocation, while the engine makes explosions in two cylinders, and by causing the controller to extend the injection time width of one of two injectors which inject during one discharge of the high-pressure fuel pump and to shorten the injection time width of the other injector.