Patent ID: 7168419

Claim:
An exhaust gas heat exchanger comprising: a housing, a tube bundle composed of exhaust-gas tubes positioned in said housing, a cooling circuit for circulating a coolant fluid around the exhaust gas tubes, a bypass passage located in said housing, wherein the tube bundle and the bypass passage open into a common exhaust gas inlet region and also in a common exhaust gas outlet region, a selectively actuatable exhaust gas valve comprising a moveable closure member arranged in either the inlet region or the outlet region for guiding the flow of exhaust gas selectively through the tube bundle or the bypass passage, wherein the closure member is designed as an angle flap with two half-flaps fixedly arranged approximately at right angles to one another and having a common apex, at which the closure member is mounted for rotation about the drive shaft, and wherein one half-flap selectively pivots about the pivot axle to respectively cover an inlet cross section of the tube bundle or the bypass passage, while the other half-flap is oriented parallel to the exhaust gas flow direction.