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

1981-12-22

1985-01-01

Shaw, Gareth D.

Boots, shoes, and leggings

123489, 123440, F02B 300, F02D 3300

Patent

active

044919212

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 and minimum value of the applied binary signal are detected, then the difference between the maximum and minimum values and the sum of the maximum and minimum values are calculated. A reference value is calculated using the calculated difference and sum and the minimum value 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.

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patent: 4357828 (1982-11-01), Nakano
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