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:
Jul. 30, 2013
Filed:
Mar. 05, 2012
Kenji Nishida, Wako, JP;
Tetsuya Kaneko, Wako, JP;
Tomiyuki Sasaki, Wako, JP;
Shinichi Wagatsuma, Wako, JP;
Satoshi Honma, Wako, JP;
Naoki Sakamoto, Wako, JP;
Kenji Nishida, Wako, JP;
Tetsuya Kaneko, Wako, JP;
Tomiyuki Sasaki, Wako, JP;
Shinichi Wagatsuma, Wako, JP;
Satoshi Honma, Wako, JP;
Naoki Sakamoto, Wako, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
An air-fuel ratio estimating device can include an amount of fuel injected calculating unit which can estimate the amount of fuel injected GF for each cycle on the basis of a driving time Tout of a fuel injection valve. A proportional constant calculating section determines a proportional constant K, using the estimated charging efficiency CE and the amount of fuel injected Gf, when the output value of a sensor is in a transition region R. When the sensor output value is not in the transition region R, an air-fuel ratio A/F is estimated from the determined proportional constant K, a charging efficiency CE calculated by a calculating section, and the amount of fuel injected Gf.