Valve device for exhaust gas feedback in an internal combustion engine

Claim 1

In a valve arrangement for an exhaust-gas return in an internal combustion engine, comprising a control valve having reciprocally movable valve plate attached to a valve spindle, a valve housing containing a valve seat against which the valve plate is sealingly moved, said valve housing having, in a direction of flow of exhaust gases from the internal combustion engine upstream of the valve seat, an exhaust gas inlet connected to an exhaust gas return pipe and, downstream of the valve seat, an exhaust gas outlet and a valve connection supporting a housing having therein an adjustable drive mechanism, wherein the exhaust gas return pipe is connected to the exhaust gas side of the internal combustion engine and wherein the exhaust gas outlet is connected to and through a connecting pipe to a suction side of the internal combustion engine, and wherein the valve spindle extends through the valve connection, the improvement wherein the valve housing is formed from an end section of the exhaust gas return pipe itself, wherein the valve seat is defined by a constriction formed in the end section by means of a chipless deformation, wherein the valve connection is defined by an extension of the pipe of the end section located downstream of the constriction and terminating in an open pipe end, wherein the valve connection includes a means for securing the valve housing to the extension of the pipe and in the open end, wherein said extension of pipe includes a region defining a lateral opening defining the exhaust gas outlet, and wherein the connecting pipe is brazed to the extension of pipe and the region defining the lateral opening.