MUFFLER FOR ENGINE

• Main Author: ITO RYOSUKE
• Format: Patent
• Language: English; Japanese
• Published: 08.12.2016
• Subjects: BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; WEAPONS

PROBLEM TO BE SOLVED: To improve noise reduction effect of a muffler, and to suppress a temperature rise in an upper part of the muffler.SOLUTION: A muffler 50 includes: a box-shaped housing 51 having an inflow port 52a which is connected to an exhaust port 36 of an engine and into which exhaust gas flows, and an exhaust outlet 53a which exhausts the exhaust gas flowing therein; a partition plate 56 which partitions an inside of the housing 51 into a first chamber 61 including the inflow port 52a and a second chamber 62 including the exhaust outlet 53a; and a tubular part 80 provided on the partition plate 56 and allowing the exhaust gas to flow out downward in the second chamber 62 after allowing the exhaust gas to flow in from a lower portion of the first chamber 61 and guiding the exhaust gas to an upper portion of the second chamber 62. An upper end of the tubular part 80 is separated from an upper wall of the second chamber 62.SELECTED DRAWING: Figure 7 【課題】マフラの騒音低減効果の向上とマフラ上部の温度上昇の抑制とを実現する。【解決手段】マフラ５０は、エンジンの排気ポート３６に接続されて排ガスが流入する流入口５２ａと、流入した排ガスを排出する排出口５３ａとを有する箱型のハウジング５１と、ハウジング５１内を、流入口５２ａを含む第１室６１と排出口５３ａを含む第２室６２とに区画する仕切板５６と、仕切板５６に設けられて、第１室６１の下部から排ガスを流入させて第２室６２の上部に導いた後に第２室６２内にて下向きに流出させる管状部８０と、を含む。管状部８０の上端部は第２室６２の上壁と離間している。【選択図】図７