Title: Control of EGR in a closed loop EFI engine

Abstract: Means for controlling the quantities of the constituents of the combustion charge for an internal combustion engine wherein the controlled quantity is varied at a comparatively high frequency by a relatively small percentage of the presumedly correct quantity. Such variation causes an oscillation of the same relatively high frequency to appear in the output of an oxygen sensor exposed to the engine exhaust. Such sensor oscillations are detected and compared as to proportion with the percentage variation in the controlled quantity. The difference in proportion serves as an error signal to adjust the controlled quantity.

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Inventors: Taplin, Lael B. (Bloomfield Hills, MI, US)

Application Number: 826002
Filing Date: 1977-08-19
Publication_date: 1980-04-01
Assignee: The Bendix Corporation (Southfield, MI)
Primary Class(es): 123/698
Other Classes:
US Patent Ref:

4103649	Aug, 1978	Matumoto et al.	123/32.
4128885	Dec, 1978	Valek et al.	123/119.

Other Refs:
Primary Examiner: Cox, Ronald B.
Assistant Examiner:
Attorney: Lamb; Bruce L., Wells; Russel C.