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. 26, 2016
Filed:
Jan. 29, 2014
Mitsubishi Electric Corporation, Chiyoda-ku, Tokyo, JP;
Shuichi Wada, Hyogo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
Provided are a misfire detection apparatus and a misfire detection method for an internal combustion engine, which are capable of correctly detecting a misfire state of an engine for a vehicle small in number of cylinders and in rotational inertia without limiting control to Ofeedback control. When an air/fuel ratio of an exhaust gas exhausted from a cylinder that is a misfire determination subject is in a lean state, and when lean control is not being carried out on the internal combustion engine, enrichment processing for the air/fuel ratio is carried out. When the air/fuel ratio remains in the lean state even though the enrichment processing is carried out, it is determined that misfire occurs in the cylinder that is a misfire determination subject.