Exhaust gas recirculation control system for internal combustion

Details Exhaust gas recirculation control system for internal combustion Exhaust gas recirculation control system for internal combustion

1998-03-17

2000-06-20

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Including cylinder pressure or temperature responsive means

12356816, F02M 2507

Patent

active

06076502&

ABSTRACT:
An exhaust gas recirculation control system for internal combustion engines, comprising an exhaust gas recirculation passage for recirculating a part of an exhaust gas from an internal combustion engine into the engine; an exhaust gas recirculation control valve for controlling a flow rate of the exhaust gas flowing in the exhaust gas recirculation passage; an opening degree controller for controlling an opening degree of the exhaust gas recirculation control valve; an operating condition detector for detecting an operating condition of the engine; means for setting a target exhaust gas recirculation ratio depending on the detected operating condition; a combustion state detector for detecting a combustion state in at least one cylinder of the engine; means for finding an actual exhaust gas recirculation ratio of the engine based on the detected combustion state; and means for controlling the opening degree controller so as to bring the actual exhaust gas recirculation ratio to the target exhaust gas recirculation ratio.

REFERENCES:
patent: 4433667 (1984-02-01), Ripper
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patent: 5425339 (1995-06-01), Fukui
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patent: 5749334 (1998-05-01), Oda et al.
patent: 5758309 (1998-05-01), Satoh
"Ion-Gap Sensing for Engine Control", Automotive Engineering/Sep. 1995.
SAE Paper No. 950004, "Ion-Gap Sense in Misfire Detection", Feb. 27-Mar. 2, 1995.

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