Method of and device for lambda-regulation of fuel mixture for a

Details Method of and device for lambda-regulation of fuel mixture for a Method of and device for lambda-regulation of fuel mixture for a

1984-07-05

1986-08-05

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Having fluidic logic control means

123489, F02D 4114

Patent

active

046036709

ABSTRACT:
A method of and a device for regulating air-fuel ratio of an internal combustion engine includes an oxygen or lambda probe and a signal processing unit connected to the lambda probe. The change-overs of the lambda signal at the output of the lambda probe are compared with a succession of adjustable first time intervals t.sub.1 and, when no change-over is detected during the first time interval, the output signal from the signal processing unit which controls the air-fuel ratio is abruptly changed in a jump. To avoid overshoot of the output control signal, there is provided a resetting unit by means of which the jump of the control signal is reversed when the change-over of the lambda signal occurs in an additional monitoring time interval t.sub.2 following the first monitoring time interval t.sub.1.

REFERENCES:
patent: 3782347 (1974-01-01), Schmidt et al.
patent: 3831564 (1974-08-01), Schmidt et al.
patent: 4170040 (1979-10-01), Leblanc et al.
patent: 4290400 (1981-09-01), Pomerantz
patent: 4364356 (1982-12-01), Gerhold

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