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

1984-07-10

Gruber, Felix D.

Boots, shoes, and leggings

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

Patent

active

044596693

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 value or the maximum and minimum values of the applied binary signal are detected, then a reference value is calculated using the maximum value or the maximum and minimum values from a predetermined algebraic function. Thereafter, the applied binary signal is compared with the calculated reference value to generate a binary signal indicative of the comparison result. Then, the air-fuel ratio of the engine is adjusted in response to this binary signal calculated by the digital computer.

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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