Exhaust after treatment system for post-treatment of nitrogen oxide in exhaust gas of self-ignition internal combustion engine of vehicle, has pressure line comprising ice pressure compensation line that is provided with hose wall

摘要

The system has a conveyor unit (20) for delivering a reducing agent i.e. AdBlue(RTM: diesel exhaust fluid), to a dosing module (26) via a pressure line (22). The pressure line comprises a replaceable, tubular ice pressure compensation line (24) with a hose wall that is designed as a multilayer structure. An exhaust gas flow (14) flows through an exhaust gas tract. A storage layer of the multilayer structure stores an energy resulting from a pressure change in the ice pressure compensation line. A transport layer of the multilayer structure is provided with holes and slots. The storage layer of the multilayer structure includes a structural assembly provided with separate chambers that are filled with a heat-conductive material.