Patent ID: 7448206

Claim:
An apparatus for posttreatment of an exhaust gas of an internal combustion engine, comprising: a device for metered spraying of a substance to be mixed with the exhaust gas; an exhaust gas line through which the exhaust gas flows, the device spraying the substance to be mixed with the exhaust gas into the exhaust gas line; an impact plate ( 18 ), disposed inside the exhaust gas line ( 2 ) in the spraying direction of the device ( 6 , 8 ), wherein the thickness of the material comprising the impact plate is less than a wall thickness of the exhaust gas line, such that the impact plate has a low thermal capacity in comparison to the exhaust gas line; and at least one connection element ( 26 ) disposed between the impact plate and the wall of the exhaust gas line; wherein the thermal conductivity of the connection element ( 26 ) is low in comparison to the thermal conductivity of the exhaust gas line.