MUFFLER FOR ENGINE, AIR-COOLED ENGINE AND WORK MACHINE

• Main Authors: TSURUOKA SHINGO, SUGIHARA ATSUKI, SAITO MINE
• Format: Patent
• Language: English; Japanese
• Published: 06.09.2022
• 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

To effectively reduce a low-frequency side component of an engine exhaust sound without increasing a size of a muffler for an engine.SOLUTION: A muffler 41 for an engine includes: a muffler body 94 including muffler chambers 111-113; and an exhaust pipe 99 for discharging an exhaust gas that has passed through the muffler chambers 111-113 to the outside space S. An edge part 99b located downstream in an exhaust direction of the exhaust pipe 99 is formed into a corrugated shape that continues in a circumferential direction.SELECTED DRAWING: Figure 7 【課題】エンジン用マフラーを大型化することなく、エンジンの排気音の低周波側成分を効果的に減衰させる。【解決手段】エンジン用マフラー４１であって、消音室１１１～１１３を有するマフラー本体９４と、消音室１１１～１１３を通過した排気ガスを外部空間Ｓに排出する排出管９９と、を備え、排出管９９の排気方向下流側の縁部９９ｂは、周方向に連続する波形状を成している。【選択図】図７