Exhaust gas recirculation control system

Details Exhaust gas recirculation control system Exhaust gas recirculation control system

1996-10-21

1997-11-25

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

361153, F02M 2507, H01H 4700

Patent

active

056900830

ABSTRACT:
An EGR control system provides on-line adaptation of the EGR valve Start to Open value during normal vehicle operations. The adaptive logic determines whether the valve position output signal reaches a predetermined minimum output signal value within a desired predetermined time window defined by upper and lower time values. If outside the window, the initial duty cycle value applied to the EGR valve is increased or decreased as appropriate to force the output signal to reach the minimum value within or at the boundaries of the time window.

REFERENCES:
patent: 4500937 (1985-02-01), Matt
patent: 4604983 (1986-08-01), Carp et al.
patent: 5245501 (1993-09-01), Locher et al.
patent: 5270900 (1993-12-01), Alden et al.
patent: 5381297 (1995-01-01), Weber
patent: 5533489 (1996-07-01), Socci et al.

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