Exhaust pipe for a catalytic exhaust device

Details Exhaust pipe for a catalytic exhaust device Exhaust pipe for a catalytic exhaust device

F - Mech Eng,Light,Heat,Weapons

01

N

F01N 13/14 (2010.01) F01N 13/08 (2010.01) F01N 13/16 (2010.01) F01N 7/14 (2006.01) F01N 7/08 (2006.01) F01N 7/16 (2006.01)

Patent

CA 2163623

An exhaust pipe for a catalytic gas exhaust device comprising a gas manifold and a catalyst, said pipe (4) being located between said manifold and said catalyst and provided with a composite tube (8) consisting of an inner tube and an outer tube defining a substantially annular space therebetween. Said composite tube (8) is advantageously located within said exhaust pipe (4) with the outer tube substantially contacting said pipe, said inner (10) and outer (11) tubes having thin walls (10A, 11A) with a thickness of less than 0.3 mm.

- L'invention concerne notamment une tubulure d'échappement pour un dispositif d'échappement de gaz à catalyse compor- tant un collecteur des gaz et un catalyseur, ladite tubulure (4) étant située entre ledit collecteur et ledit catalyseur et pourvue d'un tube composite (8) qui est constitué d'un tube interne et d'un tube externe définis- sant entre eux un espace sensiblement annulaire. - Avantageusement, ledit tube composite (8) est logé à l'intérieur de ladite tubulure d'échappement (4), le tube externe venant sensiblement au contact de ladite tubulure, et lesdits tubes interne (10) et externe (11) présentent des parois minces (10A, 11A) dont l'épaisseur est infé- rieure à 0,3 millimètre.

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