Method and apparatus for misfiring detection and control in an i

Details Method and apparatus for misfiring detection and control in an i Method and apparatus for misfiring detection and control in an i

1989-10-11

1990-11-20

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Including cylinder pressure or temperature responsive means

123425, 123440, 123481, F02M 700, F02P 514, F02D 700

Patent

active

049710109

ABSTRACT:
A control apparatus for an internal combustion engine has a misfiring sensor 1 which senses the number of cylinders which are not firing based on the exhaust gas temperature of the engine. When the misfiring sensor detects that a cylinder is not firing, a microcomputer 2,3 temporarily shuts off the supply of fuel to each cylinder is succession and monitors changes in the output of the misfiring sensor. If the output of the misfiring sensor does not change when the fuel supply to a cylinder is temporarity cut off, that cylinder is determined to be misfiring, and the microcomputer cuts off the supply of fuel to the misfiring cylinder.

REFERENCES:
patent: 4006718 (1977-02-01), Konomi
patent: 4305364 (1981-12-01), Stuckas
patent: 4409936 (1983-10-01), Dozono
patent: 4499876 (1985-02-01), Yamamoto
patent: 4825836 (1989-05-01), Hirose
patent: 4903665 (1990-02-01), Washino et al.

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