Method of and device for regulating fuel-and-air mixture supplie

Details Method of and device for regulating fuel-and-air mixture supplie Method of and device for regulating fuel-and-air mixture supplie

1983-10-20

1986-07-22

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

123494, F02M 5100, F02M 712

Patent

active

046012761

ABSTRACT:
Disclosed is a method and device for regulating the preparation of fuel-and-air mixture in a carburetor, fuel injection system and the like of an internal combustion engine. The device includes an oxygen probe directly communicating with the combustion chamber of the engine. Periodically fluctuating output signal of the probe is applied to an averaging circuit which produces an average output signal over a predetermined number of engine cycles. The shape and length of the averaged output signal is indicative whether the mixture ratio is lean or rich. The averaging can be made by means of a lowpass filter, an integrator or at least one counter counting in response to the angular position of the crankshaft or the predetermined time intervals. When the probe output voltage has the form of a hump or bulge, its length or area is used for determining the actual .lambda. value in the rich range of ratios of the mixture.

REFERENCES:
patent: 3895611 (1975-07-01), Endo et al.
patent: 4111171 (1978-09-01), Aono et al.
patent: 4122811 (1978-10-01), Bowler et al.
patent: 4224910 (1980-09-01), O'Brien
patent: 4255789 (1981-03-01), Hartford et al.
patent: 4266274 (1981-05-01), Barman
patent: 4397278 (1983-08-01), Hughes

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