Exhaust gas recirculation control

Details Exhaust gas recirculation control Exhaust gas recirculation control

F - Mech Eng,Light,Heat,Weapons

02

M

123/98.04

F02M 25/06 (2006.01) F02M 25/07 (2006.01)

Patent

CA 1185847

EXHAUST GAS RECIRCULATION CONTROL Abstract of the disclosure In an internal combustion engine, recirculation of exhaust gases is controlled to maintain the control pressure in a zone of the recirculation passage proportional to a reference pressure and thus to provide exhaust gas recircula- lion as a proportion of induction air flow. A duty cycle modulated valve controls an exhaust back- pressure port and an atmospheric pressure port to create the reference pressure, whereby the proportion of exhaust vases recirculated is established by the duty cycle and is independent of the induction air flow.

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