Muffler unit for general-purpose engine

F - Mech Eng,Light,Heat,Weapons – 01 – N

Patent

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Details

F01N 1/08 (2006.01) F01N 13/18 (2010.01) F01N 1/00 (2006.01) F01N 1/10 (2006.01) F01N 3/05 (2006.01)

Patent

CA 2607271

A muffler unit for a general-purpose engine includes a muffler (40) having a maze of sound-deadening chambers (101, 102, 103) defined therein and an inlet pipe (85) disposed inside the muffler. The inlet pipe has an open end (106) connected to an exhaust port of the engine via an exhaust pipe (43), a closed end (107) opposite to the open end, and perforations (108) provided near the open end and connecting an internal space of the inlet pipe and a first sound- deadening chamber (101). The closed end of the inlet pipe is exposed to the outside air, so that exhaust gasses are cooled when the gasses impinge on the closed end of the inlet pipe.

Unité de silencieux pour moteur polyvalent comprenant un silencieux (40) à réseau interne défini de chambres insonorisantes (101, 102, 103), et à conduit d'admission (85) à l'intérieur du silencieux. Le conduit d'admission comporte une extrémité ouverte (106) reliée à un orifice d'échappement du moteur via un tuyau d'échappement (43), une extrémité fermée (107) à l'opposé de l'extrémité ouverte, et des perforations (108) à proximité de l'extrémité ouverte et reliant un espace interne du conduit d'admission à une première chambre insonorisante (101). L'extrémité fermée du conduit d'admission est exposée à l'air ambiant, ce qui permet de refroidir les gaz d'échappement lorsque ceux-ci atteignent l'extrémité fermée du conduit d'admission.

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