Exhaust gas recirculation system for internal combustion engine

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

2006-07-25

2006-07-25

Denion, Thomas (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

Material from exhaust structure fed to engine intake

C060S274000, C060S299000

Reexamination Certificate

active

07080506

ABSTRACT:
An exhaust gas recirculation system is configured to recirculate a large amount of exhaust gas to an engine intake passage while reducing contamination inside the intake passage caused by the recirculated exhaust gas and prevent damage to the intake passage caused by the heat of the recirculated exhaust gas. A first recirculation path recirculates exhaust gas from an upstream section of the exhaust passage located upstream of a catalytic converter unit. A second recirculation path recirculates exhaust gas from a downstream section of the exhaust passage located downstream of the catalytic converter unit. A control unit is provided that controls the switching of a selector valve between the first and the second recirculation paths based on the temperature of the recirculated exhaust gas.

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