| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable sufficient vibration absorption even when the distance between the exhaust pipe and the water lock is short by connecting an exhaust pipe of an engine and a water lock with a flexible rubber hose and forming this rubber hose in bellows. SOLUTION: With a cruising vessel (jet propelled vessel) on the water, an engine room is formed in the hull to the bow and a pump room is formed in the hull to the stern. An exhaust system, which has a first exhaust expansion chamber which by-passes to the upper front of the engine in a U-shape and a second exhaust chamber extending to the rear that is connected to the rear end portion of this exhaust expansion chamber, is connected to an engine in the engine room. An exhaust pipe 15 of a double pipe construction provided with a water jacket 15d extends to the downstream side from a catalyst within this second exhaust expansion chamber. The exhaust pipe 15 and the water lock 17 are connected via a relatively short rubber hose 16. This rubber hose 16 is formed in bellows, which improves the vibration reduction effect of the rubber hose 16.</p> |
