Method for detecting engine misfire and for fuel control

Details Method for detecting engine misfire and for fuel control Method for detecting engine misfire and for fuel control

1989-05-01

1990-06-12

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Including means responsive to instantaneous change in engine...

731173, 123491, F02D 4104

Patent

active

049323792

ABSTRACT:
Misfire is detected in an internal combustion engine during its starting mode by analyzing the engine speed profile. Average speed is determined for 60.degree. increments of crankshaft rotation. If an increment midway between top dead center positions has a higher speed than the previous increment and a higher speed than cranking speed, combustion occurred, otherwise a misfire occurred. When misfires are detected for a particular cylinder the calculated fuel allotment for that cylinder is reduced in accordance with the number of consecutive misfires for that cylinder.

REFERENCES:
patent: 4366793 (1983-01-01), Coles
patent: 4372269 (1983-02-01), Coles
patent: 4691286 (1987-09-01), Obayashi et al.
patent: 4697561 (1987-10-01), Citron

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