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:
Jun. 10, 1997
Filed:
May. 16, 1994
Yukinobu Nishimura, Hyogo, JP;
Akira Demizu, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In a misfire detecting device for an internal combustion engine having a plurality of cylinders, revolution detecting device detects the revolution of an engine; arithmetic device calculates deflections in revolution of the engine for each of the cylinders on the basis of a period of revolution of the engine in correspondence to the order of combustion of the cylinders; threshold value determining device determines a misfire decision threshold value for the cylinders from a value obtained by smoothing arithmetic values which are determined for the cylinders by the arithmetic device, and a predetermined value; and misfire deciding device compares the arithmetic values provided by the arithmetic device with the threshold value to comparison, to determine the occurrence of a misfire in any one of the cylinders.