Control of EGR in a closed loop EFI engine

Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means

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123 32EE, F02M 700, F02B 300

Patent

active

041956044

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.

REFERENCES:
patent: 4103649 (1978-08-01), Matumoto et al.
patent: 4128885 (1978-12-01), Valek et al.

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