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. 29, 2008
Filed:
Jul. 25, 2006
Satoshi Yamaguchi, Wako, JP;
Mamoru Hasegawa, Wako, JP;
Naoto Kitayama, Wako, JP;
Hideki Sakamoto, Wako, JP;
Akira Odajima, Wako, JP;
Satoshi Yamaguchi, Wako, JP;
Mamoru Hasegawa, Wako, JP;
Naoto Kitayama, Wako, JP;
Hideki Sakamoto, Wako, JP;
Akira Odajima, Wako, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A control system for an internal combustion engine having a fuel injection valve. A fuel injection timing is determined according to the detected engine operating condition. A target ignition timing of the fuel is calculated using a plurality of maps that store the target ignition timings according to the engine operating condition and an actual ignition timing of the fuel is detected. An ignition delay of the actual ignition timing with respect to the target ignition timing is calculated. The cetane number of the fuel is estimated according to the calculated ignition delay. The map to be used in calculating the target ignition timing is switched according to the estimated cetane number.