Reducing agent adding device for e.g. diesel engine of motor vehicle, has inner isolating layer casing and outer isolating layer casing surrounding section of nozzle pipe, which is arranged within exhaust pipe

摘要

The device has a nozzle pipe (2) for supplying a reducing agent, and an inner isolating layer casing and an outer isolating layer casing (10) surrounding section of the nozzle pipe. The nozzle pipe is arranged within an exhaust pipe of an internal combustion engine. A fluid flow guided coaxial to the nozzle pipe is provided as the inner casing and a thermally isolated solid is provided as the outer casing.