Misfire detecting apparatus for multicylinder internal combustio

Details Misfire detecting apparatus for multicylinder internal combustio Misfire detecting apparatus for multicylinder internal combustio

1992-09-28

1994-02-22

Raevis, Robert

Measuring and testing

Test stand

For engine

G01M 1500

Patent

active

052877361

ABSTRACT:
In a misfire detecting apparatus for a multicylinder internal combustion engine, a rotational signal outputting unit outputs a rotary signal at every predetermined rotary angle, and a tentative misfire decision unit tentatively decides, on the basis of the rotary signal, whether or not misfire has occurred in each cylinders of the engine. A tentative misfire number counting unit counts the number of tentative misfires decided for respective cylinders, and a counting result storage unit stores the counting results. After a given number of tentative misfire decisions have been made, it is decided that misfire has actually occurred, only if the counting result, for a part of the cylinders, among the counting results for respective cylinders stored in the counting result storage unit is larger than a predetermined number.

REFERENCES:
patent: 5041980 (1991-08-01), Maddock et al.
patent: 5088318 (1992-02-01), Osawa
patent: 5095742 (1992-03-01), James et al.

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