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:
Oct. 20, 2009
Filed:
May. 09, 2007
Takahide Mizuno, Wako, JP;
Shusuke Akazaki, Wako, JP;
Hiroyuki Sugiura, Wako, JP;
Yuji Yamamoto, Wako, JP;
Mitsuo Hashizume, Wako, JP;
Kentaro Onuma, Wako, JP;
Takahide Mizuno, Wako, JP;
Shusuke Akazaki, Wako, JP;
Hiroyuki Sugiura, Wako, JP;
Yuji Yamamoto, Wako, JP;
Mitsuo Hashizume, Wako, JP;
Kentaro Onuma, Wako, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
An in-cylinder pressure detection device for an internal combustion engine, which is capable of calculating a hysteresis amount properly to thereby detect in-cylinder pressure with high accuracy. The in-cylinder pressure detection device comprises an in-cylinder pressure sensor that detects in-cylinder pressure as a detected in-cylinder pressure. The in-cylinder pressure detection device estimates an in-cylinder pressure generated when combustion is not performed in the cylinder, as a motoring pressure, calculates a hysteresis amount indicative of a difference between the detected in-cylinder pressure and an actual in-cylinder pressure, based on the detected in-cylinder pressure and the motoring pressure obtained during the exhaust stroke of the engine, and corrects the detected in-cylinder pressure based on the calculated hysteresis amount.