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:
Aug. 22, 1995
Filed:
Apr. 12, 1994
Applicant:
Inventors:
Yasutoshi Baba, Chiryu, JP;
Yukihide Hashiguchi, Toyota, JP;
Assignee:
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M / ;
U.S. Cl.
CPC ...
731173 ; 340439 ;
Abstract
A misfiring detecting device comprising a sensor for detecting the angular velocity of the crankshaft. The elapsed time required for the crankshaft to rotate by a certain crank angle is detected at the time of combustion at each cylinder. The difference .DELTA.T.sub.n (=T.sub.n -T.sub.n-2) of the elapsed time T between cylinders with explosion strokes one interval apart is found and it is judged that a misfire has occurred when the difference .DELTA.T.sub.n has exceeded a set value K.sub.1 and also the pattern of change of the elapsed time (.DELTA.TC) has become the pattern of change of the time of a misfire.