Patent ID: 7992677

Claim:
A motor vehicle exhaust line silencer comprising: an upper shell comprising a substantially flat upper end wall; a lower shell comprising a substantially flat lower end wall parallel to the upper end wall, the upper and lower shells delimiting between them an internal volume of the silencer; wherein the silencer comprises at least an internal partition wall substantially parallel to the upper and lower end walls and arranged in the internal volume, the upper and lower end walls having respective reliefs projecting into the internal volume and cooperating to immobilize the internal partition wall, the internal partition dividing the internal volume into an upper volume delimited by the internal partition wall and by the upper end wall, and a lower volume delimited by the internal partition wall and by the lower end wall, each of the upper and lower volume having at least one chamber delimited by side walls extending continuously from the internal partition wall to the upper and lower end wall respectively, the reliefs of the upper end wall being located away from the side walls of all the chambers of the upper volume and being distributed over the surface of the upper end wall, and the reliefs of the lower end wall being located away from the side walls of all the chambers of the lower volume and being distributed over the surface of the lower end wall.