Control of egr in a closed loop efi engine

Details Control of egr in a closed loop efi engine Control of egr in a closed loop efi engine

F - Mech Eng,Light,Heat,Weapons

02

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341/38.13

F02M 51/00 (2006.01) F02D 21/08 (2006.01) F02D 35/00 (2006.01) G05D 11/13 (2006.01)

Patent

CA 1118077

ABSTRACT Means for controlling the quantities of the constitu- ents of the combustion charge for an internal combustion engine wherein the controlled quantity is varied at a com- paratively 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. -1-

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