Device at intake systems for internal combustion engines

A device at an intake system for internal combustion engines having a number of cylinders arranged in an engine block, and with elongated inlet manifolds to the engine cylinders, a return conduit for exhaust gases provided between the exhaust side and the intake side of the engine, said return conduit being provided with a valve controlled by an engine parameter, whereby a connection flange is provided between the engine block and the inlet manifolds, said connection flange being equipped with through openings for intake air to the engine cylinders, and with an exhaust channel arranged along the edge portions of the connection flange in the flange material, which exhaust channel via said valve is connectable to the exhaust side of the engine and along its extension being equipped with branch conduits, which communicate with the different through openings,

• characterized therein that the connection flange is equipped with a further internal channel having essentially the same extension as the exhaust channel, but which is situated between this exhaust channel and the side of the connection flange facing the intake manifolds, and which further channel is connected to an outlet tube forming part of the intake system before a throttle valve provided therein for supply of air to the further channel.