Retaining device for retaining of reducing agent-dosing valve, has internal space for retaining reducing agent-dosing valve, and sound damping device, which absorbs sound waves that come out from internal space

摘要

The device (10) has an internal space for retaining a reducing agent-dosing valve (20), and a sound damping device, which absorbs sound waves that come out from the internal space. The sound damping device is equipped with airborne-sound damping units (18, 30). The sound damping device comprises a flexible unit (16), which partially surrounds the inner space and absorbs air borne sound from the internal space.