Title: Circuit means and apparatus for controlling the air-fuel ratio supplied to a combustion engine

Abstract: A carbureting type fuel metering apparatus has an induction passage into which fuel is fed by several fuel metering systems among which are a main fuel metering system and an idle fuel metering system, as generally known in the art; electrical circuit means responsive to signals produced by associated engine exhaust gas analyzing means, sensitive to selected constituents of such exhaust gas and also responsive to other selected indicia of vehicle and/or engine operating conditions, creates feedback signal means which through associated transducer means become effective for controllably modulating the metering characteristics of the main fuel metering system and the idle fuel metering system.

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Inventors: Tsiang, Chong L. (Utica, MI, US)

Application Number: 768181
Filing Date: 1977-02-14
Publication_date: 1980-04-15
Assignee: Colt Industries Operating Corp. (New York, NY)
Primary Class(es): 123/684 60/276, 123/689, 123/701
Other Classes:
US Patent Ref:

3680318	Aug, 1972	Nakasima et al.	60/278.
3759232	Sep, 1973	Wahl et al.	123/32.
3782347	Jan, 1974	Schmidt et al.	123/119.
3866588	Feb, 1975	Nakada et al.	123/124.
3906910	Sep, 1975	Szlag, Jr.	123/119.
3911884	Oct, 1975	Morya et al.	123/139.
3926154	Dec, 1975	Williams	123/32.
3963009	Jun, 1976	Mennesson	123/119.

Other Refs:
Primary Examiner: Myhre, Charles J.
Assistant Examiner: Nell, R. A.
Attorney: Potoroka, Sr.; Walter