OUTBOARD MOTOR

• Main Authors: HARADA YOSHIHIRO, IKENO TETSURO, KASAI KOJI, KURODA TATSUYA
• Format: Patent
• Language: English; Japanese
• Published: 08.10.2020
• Subjects: BLASTING; COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MARINE PROPULSION OR STEERING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; RELATED EQUIPMENT; SHIPS OR OTHER WATERBORNE VESSELS; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; TRANSPORTING; WEAPONS

To suppress an air noise of a V-type engine with a simple configuration and reduce the size of an outboard motor itself as much as possible.SOLUTION: An outboard motor 10 has a V-type engine (engine 22) in which a plurality of cylinders 30 are arranged in a V shape in a plan view, and a cover 12 that covers the engine 22. The engine 22 has a plurality of intake ports 76 that are paired in a V shape inside the plurality of cylinders 30 in a plan view, and a concave space 78 is formed between the plurality of intake ports 76. The cover 12 has, in the inside thereof, an intake path 64 for guiding air to the intake ports 76, and is provided with a muffler 80 for attenuating noise during air intake, at a position adjacent to the intake path 64 and entering the concave space 78.SELECTED DRAWING: Figure 4 【課題】簡単な構成によってＶ型エンジンのエア音を抑制し、且つ船外機自体を可及的に小型化する。【解決手段】船外機１０は、複数の気筒３０が平面視でＶ字状に配列されるＶ型エンジン（エンジン２２）と、エンジン２２を覆うカバー１２とを有する。エンジン２２は、平面視で、複数の気筒３０の内側においてＶ字状に対をなす複数の吸気ポート７６を有すると共に、複数の吸気ポート７６の間に凹空間７８を形成している。カバー１２は、吸気ポート７６にエアを導く吸気経路６４を内部に有し、且つ吸気経路６４に隣接すると共に凹空間７８に入り込む位置に、吸気時の音を減衰させる消音器８０を備える。【選択図】図４