To early activate a catalyst with heat of an exhaust gas.SOLUTION: An exhaust device (30) comprises: a chamber (40) forming an expansion chamber (43) for an exhaust gas on a downstream side of an exhaust pipe; a partition wall (54) that partitions the expansion chamber into a first expansion chamber (44) and a second expansion chamber (45); an introduction pipe (32) entering the second expansion chamber from a downstream end of the exhaust pipe; and a catalyst (39) interposed at an intermediate portion of the introduction pipe in the second expansion chamber. The partition wall is formed with a first opening (56) connecting an outlet of the introduction pipe to the first expansion chamber and a second opening (57) connecting the first expansion chamber to the second expansion chamber. The second opening overlaps with the catalyst when viewed from the first expansion chamber side.SELECTED DRAWING: Figure 6
【課題】排気ガスの熱によって触媒の早期活性化を図る。【解決手段】排気装置(30)は、排気管の下流側に排気ガスの膨張室(43)を形成するチャンバ(40)と、膨張室を第1の膨張室(44)及び第2の膨張室(45)に仕切る隔壁(54)と、排気管の下流端から第2の膨張室に入り込む導入管(32)と、第2の膨張室において導入管の途中に介在された触媒(39)と、を備えている。隔壁には、導入管の出口を第1の膨張室に連ねる第1の開口(56)と、第1の膨張室を第2の膨張室に連ねる第2の開口(57)と、が形成されている。第1の膨張室側から見て第2の開口が触媒に重なっている。【選択図】図6
EXHAUST DEVICE
排気装置
2022-02-18
Patent
Electronic Resource
Japanese
IPC: | F01N GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL , Schalldämpfer oder Auspuffvorrichtungen für Gase von Kraft- und Arbeitsmaschinen oder von Kraftmaschinen allgemein / B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |