Closed loop mixture control system using a two-barrel carburetor

Details Closed loop mixture control system using a two-barrel carburetor Closed loop mixture control system using a two-barrel carburetor

1976-03-09

1978-08-22

Hart, Douglas

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123127, 261 23A, 261 41C, 261121B, F02D 3500

Patent

active

041081218

ABSTRACT:
A closed loop mixture control system for an internal combustion engine includes a two-barrel carburetor having a primary throttle and a secondary throttle which is adapted to be automatically brought into action when the primary venturi depression reaches a predetermined value. An exhaust composition sensor is provided to control the air-fuel ratio through the primary barrel so that the conversion efficiency of a catalytic convertor is at a maximum during the time prior to the operation of the secondary throttle.

REFERENCES:
patent: 3186691 (1965-06-01), Manning
patent: 3250264 (1966-05-01), Bartholomew
patent: 3317195 (1967-05-01), Bickhaus
patent: 3364911 (1968-01-01), Baudry
patent: 3730496 (1973-05-01), Morgenroth
patent: 3861366 (1975-01-01), Masaki
patent: 3899551 (1975-08-01), Korte
patent: 3906910 (1975-09-01), Szlaga
patent: 3921612 (1975-11-01), Aono

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