EXHAUST LINE FOR A MOTOR VEHICLE WITH AN IMPROVED PIVOTABLE COUPLING

摘要

The invention relates to a motor vehicle exhaust line (10) comprising at least one upstream tube (12) hinged with a downstream tube (14) via a ball-and-socket joint (16). Said ball-and-socket joint (16) comprises a male frusto-conical element (18) that is rigidly connected to the upstream tube (12) and is received against a female frusto-conical element (20) attached to the end of the downstream tube (14). An end section (12) of the upstream tube, having a predetermined length (1), projects outwardly from the male frusto-conical element (18) that is at least partially inside the female frusto-conical element (20), and supports a sealing ring (24) inserted between said end section (22) of the upstream tube (12) and an inner wall (26) of the female frusto-conical element (20). The upstream tube (12) receives a converging intermediate frusto-conical element that is an aerodynamic deflector that channels the exhaust gases (G) and the corresponding calories out of the area of contact of the ring (24) with the end section (22) of the upstream tube (12) and the female frusto-conical element (20).