Method and apparatus for controlling the air-fuel ratio in an in

Details Method and apparatus for controlling the air-fuel ratio in an in Method and apparatus for controlling the air-fuel ratio in an in

1981-06-24

1984-07-03

Gruber, Felix D.

Boots, shoes, and leggings

123440, 123480, 36443105, F02B 304, F02D 3500, F02M 5100

Patent

active

044583192

ABSTRACT:
An output voltage from an O.sub.2 sensor is intermittently sampled and the sampled voltage is converted into a binary signal. The binary signal is applied to an electrical digital computer, and therein the following operations are carried out. First, the maximum and minimum values of the applied binary signal are detected, then the difference between the detected values is calculated. Thereafter, the calculated difference is compared with a predetermined value to generate a binary signal indicative of the comparison result. The air-fuel ratio feedback control responsive to the applied binary signal is executed when the binary comparison result signal indicates that the calculated difference is larger than or equal to a predetermined value.

REFERENCES:
patent: 4263652 (1981-04-01), Henrich
patent: 4290107 (1981-09-01), Suda et al.
patent: 4314537 (1982-02-01), Asano et al.
patent: 4324218 (1982-04-01), Hattori et al.
patent: 4345562 (1982-08-01), Drews et al.
patent: 4355615 (1982-10-01), Asano et al.
patent: 4359029 (1982-11-01), Furuhashi et al.

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