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:
Jun. 25, 2002
Filed:
Aug. 25, 1998
Susumu Takahashi, Kanagawa, JP;
Masaaki Nishitou, Kanagawa, JP;
Isuzu Motors Limited, Tokyo, JP;
Abstract
The fuel injection control device for engines minimizes variations of the pressure of the common rail that stores fuel, by equalizing the amount of fuel delivered by pump chambers of the fuel pump. For example, the common rail pressure that has fallen as a result of fuel injection by the secondly-operated injector is recovered to the pressure Pf( ) by the fuel delivered from the pump chamber containing the thirdly-operated piston. The difference between the recovered pressure Pf( ) and the common rail pressure Pf( ) that was recovered following the preceding fuel injection has a correlation with the amount of fuel delivered from the corresponding pump chamber. In this way, based on the difference between the common rail recovery pressures provided by the fuel delivered from the successively operated pump chambers, the amount of fuel delivered from each pump chamber is regulated to control the recovered common rail pressure.