Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1972-09-18
1981-09-08
Cox, Ronald B.
Internal-combustion engines
Charge forming device
Fuel injection system
F02B 300
Patent
active
042878659
ABSTRACT:
A closed loop engine control system for internal combustion engines is described. The control system includes a comparator which is responsive to signals indicative of the presence or absence of oxygen in the exhaust gas of the engine and a set point or reference and is operative to generate an output signal for receipt by a fuel delivery controller which will cause that fuel delivery controller to increase fuel delivery in the presence of oxygen molecules in the exhaust gas and to decrease fuel delivery in the absence of oxygen molecules in the exhaust gas in order to maintain the fuel delivery at the predetermined, and preferably the stoichiometric, air/fuel ratio mixture point. An oscillatory stabilization signal is also applied to the comparator to reduce the amplitude of the limit cycle. The frequency of the stabilization signal should be slightly above the band pass frequency of the closed loop and the amplitude of the signal should be less than the minimum deviation expected between the sensor output signal and the set point level for square wave stabilization signals.
REFERENCES:
patent: 3548792 (1970-12-01), Palmer
patent: 3548795 (1970-12-01), Howland
patent: 3610212 (1971-10-01), Endo
patent: 3616274 (1971-10-01), Eddy
patent: 3636931 (1972-01-01), Suda
patent: 3676782 (1972-07-01), Lane et al.
patent: 3707950 (1973-01-01), Schlimme
patent: 3782347 (1974-01-01), Schmidt et al.
patent: 3815561 (1974-06-01), Seitz
patent: 3875907 (1975-04-01), Wessel et al.
Cox Ronald B.
Haas, Jr. Gaylord P.
The Bendix Corporation
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