Exhaust gas recirculation control

Details Exhaust gas recirculation control Exhaust gas recirculation control

F - Mech Eng,Light,Heat,Weapons

02

M

123/98.03

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

Patent

CA 1095352

EXHAUST GAS RECIRCULATION CONTROL ABSTRACT OF THE DISCLOSURE A transducer regulates an operating pressure which positions an exhaust gas recirculation control valve pintle to provide exhaust gas recirculation at rates which maintain the pressure in the recirculation passage upstream of the valve pintle equal to a reference pressure; exhaust gas recirculation thus varies with engine exhaust backpressure and accordingly is substantially proportional to induction air flow. The transducer has a pair of current carrying coils which create a bias affect- ing the reference pressure; the current is adjusted for selected operating conditions to change the reference pressure and thereby change the proportion of exhaust gas recirculation to induction air flow.

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