Air-fuel ratio control method and its apparatus

Details Air-fuel ratio control method and its apparatus Air-fuel ratio control method and its apparatus

1980-04-02

1982-08-24

Nelli, R. A.

Internal-combustion engines

Charge forming device

Having fluidic logic control means

123478, 123486, 36443104, F02B 300, F02G 300, F02D 500, G05B 1500

Patent

active

043455611

ABSTRACT:
An apparatus for controlling an air-fuel ratio of a combustion engine with a memory device for storing correct values for air-fuel control in accordance with an intake condition of said combustion engine and a rotation speed of the same. In the apparatus, an air-fuel ratio represented by the exhaust gas composition of the internal combustion engine is sensed and the sensed value is integrated. When the integrated value from the integrator fails within a predetermined range of values, one of the correction values for the air-fuel ratio control is corrected in accordance with a current condition of the internal combustion engine. When the integrated value falls outside the predetermined range, the correction values are replaced by a predetermined reference value and an air-fuel ratio of mixture supplied to the combustion engine is controlled in accordance with the correction values for the air-fuel ratio stored.

REFERENCES:
patent: 3838397 (1974-09-01), Watson et al.
patent: 4130095 (1978-12-01), Bowler et al.
patent: 4155332 (1979-05-01), Taegashi et al.
patent: 4167924 (1979-09-01), Carlson et al.
patent: 4172433 (1979-10-01), Bianchi et al.
patent: 4181944 (1980-06-01), Yamauchi et al.
patent: 4210106 (1980-07-01), Wessel et al.
patent: 4214306 (1980-07-01), Kobayashi
patent: 4228775 (1980-10-01), Schweikert
patent: 4257377 (1981-03-01), Kinugawa et al.

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