Air-fuel ratio control system for internal combustion engines

Details Air-fuel ratio control system for internal combustion engines Air-fuel ratio control system for internal combustion engines

1973-11-15

1976-04-27

Burns, Wendell E.

Internal-combustion engines

Noncompression

F02D 502

Patent

active

039527107

ABSTRACT:
There is provided an air-fuel ratio control system for internal combustion engines wherein the direction of deviation of the actual air-fuel ratio from a preset air-fuel ratio is determined by an oxygen concentration detector for detecting the concentration of oxygen contained in the exhaust gases from an internal combustion engine and an air-fuel ratio discriminating circuit, whereby air is injected from an air injection valve when the air-fuel ratio is low i.e. the mixture is rich and fuel is injected from a fuel injection valve when the air-fuel ratio is high i.e. the mixture is lean, thereby controlling the air-fuel ratio to a predetermined value.

REFERENCES:
patent: 2934050 (1960-04-01), Pribble
patent: 3548792 (1970-12-01), Palmer et al.
patent: 3745768 (1973-07-01), Zechnall et al.
patent: 3759232 (1973-09-01), Wahl et al.
patent: 3782347 (1974-01-01), Schmidt et al.
patent: 3815561 (1974-06-01), Seitz
patent: 3827237 (1974-08-01), Linder et al.
patent: 3831564 (1974-08-01), Schmidt et al.

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