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. 09, 2001
Filed:
May. 28, 1999
Yukinobu Nishimura, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A device for detecting the misfire in an internal combustion engine which features improved reliability for judging the misfire in all operation regions by using either the revolution data or the ionic current depending upon the operation region. The device comprises various sensors,and,for detecting the operation conditions Ne and Qa of the internal combustion engine, an operation region detection means,for detecting the operation region R from the operation conditions, a control parameter operation means,for operating control parameters J, P based upon the operation conditions, an ignition device,for igniting the internal combustion engine relying upon the control parameters, an ionic current detection unit,for detecting an ionic current generated upon the ignition, a first misfire judging means,for judging the misfire in the internal combustion engine based upon a change in the time of the revolution data Ne, a second misfire judging means,for judging the misfire based upon the ionic current, and a misfire judgement selection means,for selectively using the first misfire judging means or the second misfire judging means depending upon the operation region.