Exhaust line sound emission silencer for motor vehicle, has dissociation unit that dissociates impact of output tubes on upstream retainer, in case of compression of silencer under effect of bump in rear part of case or on tubes

摘要

A silencer has a dissociation unit (13) that maintains the distance (12) between an upstream retainer (6) and an upstream end of an output tube (10) at less than the distance (12`) between the retainer and an upstream end of another output tube (10`). The dissociation unit dissociates the impact of the output tubes on the upstream retainer (6), in case of a compression of the silencer under the effect of a bump in the rear part of a case or on the tubes. The retainer extends in a plane such that each tube extends along the length of an axis forming an acute angle with a plane of the retainer.