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:
Jan. 06, 2009
Filed:
Apr. 02, 2007
Keiichi Takayanagi, Isesaki, JP;
Junichi Furuya, Isesaki, JP;
Yoshitatsu Nakamura, Isesaki, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A fuel supply apparatus for an engine in which calculation of a manipulated variable of a fuel pump in response to a deviation between a fuel pressure detected by a fuel pressure sensor and a target value is carried out, is configured in a manner such that when the fuel pressure sensor is failed, a change in the fuel pressure is estimated based on a required fuel flow amount of an engine, a discharge amount of the fuel pump and a fuel pressure detected immediately before the fuel pressure sensor is failed, so that deciding of the manipulated variable of the fuel pump is made, based on the estimation value. A method of controlling the fuel supply apparatus to realize the controlling of the fuel pump based on the manipulated variable is also disclosed.