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:
Apr. 21, 1992
Filed:
Jan. 07, 1991
Applicant:
Inventor:
Shinpei Nakaniwa, Isesaki, JP;
Assignee:
Japan Electronic Control Systems Co., Ltd., Isesaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01M / ;
U.S. Cl.
CPC ...
731173 ;
Abstract
A value approximately corresponding to the amount of a change in mean effective pressure calculated on the basis of the revolution period of an engine is used for discrimination of a misfire. In detecting a misfired cylinder by comparing this misfire discriminating value with a slice level, a misfire detection at the coasting time is avoided. Further, a misfire discriminating value corresponding to a misfired cylinder is specified on the basis of a predetermined varying pattern of the discriminating value. The slice level is set to the proper value in accordance with this discriminating value.