Misfire detecting device of multicylinder internal combustion en

Details Misfire detecting device of multicylinder internal combustion en Misfire detecting device of multicylinder internal combustion en

1994-04-12

1995-08-22

Chilcot, Jr., Richard E.

Measuring and testing

Vehicle chassis

Steering

340439, G01M 1500

Patent

active

054429552

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.

REFERENCES:
patent: 5088318 (1992-02-01), Osawa
patent: 5216915 (1993-06-01), Sakamoto
patent: 5245865 (1993-09-01), Kayanuma
patent: 5287737 (1994-02-01), Osawa et al.

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