Exhaust gas post-treatment device for internal combustion engine, has reducing agent introducing device for introducing reducing agent into exhaust gas pipe, and clamp receiving metering module and thermally insulated from pipe by air gap

摘要

The device has a reducing agent introducing device for introducing reducing agent into an exhaust gas pipe of an exhaust gas system. A clamp (10) receives a metering module (15) and thermally insulated from the pipe by an air gap (25). The pipe is in the form of double shell at the level of the metering module. The clamp is connected to an external tube (22). An internal tube (24) is traversed by an exhaust gas channel that is thermally insulated from the external tube by the air gap.