Patent ID: 7207324

Claim:
An air-intake duct system for a combustion engine, comprising a housing with an upper shell and a lower shell connected to one another to form an intake plenum duct, and individual air inlet ducts leading to cylinders of the combustion engine, whereby the air-intake duct system further comprises: an exhaust gas recirculation valve; an exhaust gas recirculation duct, wherein an amount of exhaust gas fed into the exhaust gas recirculation duct is controlled by the exhaust gas recirculation valve; an exhaust gas cooler arranged in the exhaust gas recirculation duct; an exhaust gas feeding device, disposed between the exhaust gas recirculation duct and the intake plenum duct, via which exhaust gas is fed into the intake plenum duct of the air-intake duct system; and a throttle valve disposed to regulate an amount of intake air, wherein the upper shell and the lower shell are connected permanently to the air-intake duct system so the exhaust gas recirculation duct is essentially produced in one piece with the housing of the air-intake duct system, and the exhaust gas recirculation valve and the throttle valve are plug-in valves that are plugged into corresponding openings of the housing.