Exhaust line for diesel vehicle, has tube for supplying reducing agent from reservoir to exhaust pipe, and non-return valve for preventing return of particles toward reservoir, where tube portion between ends of tube extends along pipe

摘要

The line (40) has an exhaust pipe (44) for discharging exhaust gases to atmosphere. A tube (46) supplies reducing agent i.e. gaseous ammonia, from a reservoir to the pipe. An end of the tube is fixed to the pipe, where the tube supports a snap-on element (52). A non-return valve prevents return of particles toward the reservoir. A portion of the tube between ends of the tube extends along the pipe. A drain (50) is connected to the tube by the snap-on element. The pipe forms a ceramic sleeve of a selective catalytic reduction (SCR) system.