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. 19, 2010
Filed:
Aug. 28, 2008
Kouji Ishizuka, Aichi-ken, JP;
Kouichi Sugiyama, Chiryu, JP;
Manabu Tsujimura, Anjo, JP;
Tetsuya Ohno, Kiyosu, JP;
Kouji Ishizuka, Aichi-ken, JP;
Kouichi Sugiyama, Chiryu, JP;
Manabu Tsujimura, Anjo, JP;
Tetsuya Ohno, Kiyosu, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A fuel injection system designed to execute a learning operation to spray fuel through fuel injectors at each of given pressures of the fuel to determine the quantity of fuel sprayed actually from each of the fuel injectors (i.e., an actual injection quantity) into an internal combustion engine. The system calculates a deviation of each of the actual injection quantities from a target quantity to determine an injection correction value required to eliminate such a deviation. The system determines whether each of the injection correction values has an error or not and analyzes the mode in which the errors appear at the injection correction values to specify types of malfunction occurring in the system. The system relearns ones of the injection correction values as determined to have the errors.