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. 12, 2010
Filed:
Nov. 12, 2008
Applicants:
Hiroshi Haraguchi, Kariya, JP;
Akikazu Kojima, Gamagori, JP;
Youhei Morimoto, Kariya, JP;
Inventors:
Assignee:
DENSO CORPORATION, Kariya-city, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60T 7/12 (2006.01); F03B 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A fuel injector performs a main injection and a pilot injection prior to the main injection. A fuel injection controller detects an ignition timing of a fuel injected at the main injection, detects a driving condition of the internal combustion engine, and varies a pilot injection quantity of the pilot injection when the driving condition is stable. Furthermore, the controller detects a variation in ignition timing due to a variation in the pilot injection quantity, and learns the pilot injection quantity based on the variation in ignition timing due to the variation in the pilot injection quantity.