Closed-loop mixture control system for internal combustion engi

Details Closed-loop mixture control system for internal combustion engi Closed-loop mixture control system for internal combustion engi

1976-04-13

1978-10-03

Myhre, Charles J.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123 32EE, 60276, 60289, 73 23, F02M 700

Patent

active

041178157

ABSTRACT:
A closed-loop mixture control system for an internal combustion engine comprises two exhaust composition sensors having different output characteristic curves that intersect at a point corresponding to the stoichiometric air-fuel ratio at which catalytic converters operate at a maximum conversion efficiency. The outputs from the two sensors are used to generate a signal which is substantially free from error introduced to the sensors due to varying external conditions.

REFERENCES:
patent: 3674436 (1972-07-01), Geul
patent: 3745768 (1973-07-01), Zechnall et al.
patent: 3926154 (1975-12-01), Williams
patent: 3939654 (1976-02-01), Creps

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