F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
123/98.05
F02M 25/06 (2006.01) F02M 25/07 (2006.01)
Patent
CA 1072842
ABSTRACT OF THE DISCLOSURE An EGR control valve is closably disposed in an EGR passageway connecting an intake passageway and an exhaust gas passageway which leads to an internal com- bustion engine. Th EGR control valve is operated to control recirculated exhaust gas flow by varying the exhaust gas pressure in a chamber between a restriction disposed in the EGR passageway and the EGR valve, in accordance with variations in a venturi vacuum in the intake passageway to prevent the recirculated exhaust gas flow from being affected by the exhaust gas pressure in the EGR passageway upstream of the chamber. Further- more, the EGR control valve is arranged to be controlled so that the amount of the recirculated exhaust gas flow is reduced during high engine speed and low load engine operation. - 1 -
283391
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