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:
Feb. 26, 2013
Filed:
Jun. 18, 2009
Akihiro Katayama, Toyota, JP;
Naoto Kato, Susono, JP;
Shuntaro Okazaki, Suntou-gun, JP;
Kenji Kimura, Redondo Beach, CA (US);
Masashi Hakariya, Nagoya, JP;
Hiroaki Tsuji, Miyoshi, JP;
Akihiro Katayama, Toyota, JP;
Naoto Kato, Susono, JP;
Shuntaro Okazaki, Suntou-gun, JP;
Kenji Kimura, Redondo Beach, CA (US);
Masashi Hakariya, Nagoya, JP;
Hiroaki Tsuji, Miyoshi, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
An engine ECU calculates a rotational variation based on a required rotation time when a complete misfire occurs in a cylinder, a required rotation time when complete combustion occurs in the cylinder, and a required rotation time during the current combustion stroke, and integrates the calculated rotational variation. If it is determined that the number of times the rotational variation has been integrated has reached a predetermined number, the engine ECU calculates an amount of learning value deviation from the integrated rotational variation. If the amount of learning value deviation is equal to or greater than a certain amount, the engine ECU corrects a learning value of a sub-feedback control with respect to the air-fuel ratio.