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:
Dec. 31, 2013
Filed:
May. 25, 2012
Masashi Hakariya, Nagoya, JP;
Isao Nakajima, Toyota, JP;
Yoshihisa Oda, Toyota, JP;
Hitoshi Tanaka, Nisshin, JP;
Kiyotaka Kushihama, Nagoya, JP;
Shota Kitano, Toyota, JP;
Kazuyuki Noda, Toyota, JP;
Katsumi Adachi, Toyota, JP;
Yuichi Kohara, Toyota, JP;
Akihiro Katayama, Toyota, JP;
Masashi Hakariya, Nagoya, JP;
Isao Nakajima, Toyota, JP;
Yoshihisa Oda, Toyota, JP;
Hitoshi Tanaka, Nisshin, JP;
Kiyotaka Kushihama, Nagoya, JP;
Shota Kitano, Toyota, JP;
Kazuyuki Noda, Toyota, JP;
Katsumi Adachi, Toyota, JP;
Yuichi Kohara, Toyota, JP;
Akihiro Katayama, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
An abnormality detection apparatus for a multi-cylinder internal combustion engine changes a fuel injection quantity of a predetermined target cylinder to detect an abnormality of an internal combustion engine based on values of rotational variations relating to the target cylinder detected before and after the change of the fuel injection quantity. The abnormality detection apparatus corrects the values of the rotational variations relating to the target cylinder detected before and after the change of the fuel injection quantity based on at least one of the number of revolutions of the engine and an engine load at a corresponding detection time.