Air-fuel ratio feedback control system

Details Air-fuel ratio feedback control system Air-fuel ratio feedback control system

1977-07-05

1979-12-04

Myhre, Charles J.

Internal-combustion engines

Noncompression

123119EC, 60276, 60285, F02B 308, F02M 712, F01N 308

Patent

active

041766261

ABSTRACT:
The combination of a fuel supply system, an exhaust gas oxygen concentration sensor, a feedback control circuit connected to the fuel supply system and to the exhaust gas oxygen concentration sensor, a disabling circuit connected to the feedback control circuit and a fuel increment signal generating circuit connected to the fuel supply system and the disabling circuit. The combination controls the air-fuel mixture to be supplied to the engine. The combination is speed sensitive, i.e., when a predetermined engine speed is exceeded, the disabling circuit disconnects the feedback control circuit from the fuel supply system and the fuel increment signal generating circuit generates a signal which is applied to the fuel supply system in order to increase the fuel quantity supplied by the fuel supply system.

REFERENCES:
patent: 3990411 (1976-11-01), Oberstadt et al.

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