Exhaust system for small watercraft

B - Operations – Transporting – 63 – H

Patent

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Details

B63H 20/24 (2006.01) F01N 13/08 (2010.01) F01N 13/12 (2010.01) B63H 21/32 (2006.01)

Patent

CA 2652157

There is provided an exhaust system for a small watercraft, which can effectively reduce exhaust noise and, at the same time, allows high output of an engine to be easily obtained at the time of high speed traveling. An exhaust outlet of an exhaust pipe extending from an engine provided in a watercraft body is disposed at a position that allows it to sink in the water at the time when a travel speed of the watercraft body is a predetermined speed or less, and that allows it to get out of the water at the time when the travel speed of the watercraft body exceeds the predetermined speed. An open surface of the exhaust outlet, as viewed from rearward of the watercraft body, is provided so as to be offset toward a side wall surface of a pump chamber from a center of a jet pump in the pump chamber and is made oblique toward the side wall surface toward which the open surface of the exhaust outlet is offset.

Système d'échappement pour petites embarcations pouvant réduire efficacement le bruit de l'échappement et permettant, du même coup, d'obtenir facilement une puissance élevée du moteur à grande vitesse. Une sortie d'un tuyau d'échappement d'un moteur de la petite embarcation est placée dans une position qui lui permet de caler dans l'eau lorsque la vitesse de déplacement de la petite embarcation est égale ou inférieure à un point prédéterminé, et qui lui permet de sortir de l'eau lorsque la vitesse de déplacement de la petite embarcation dépasse le point prédéterminé. L'ouverture de la sortie d'échappement, comme on peut le voir à l'arrière de la petite embarcation, est décalée vers la paroi latérale du corps de pompe et par rapport au centre de la pompe à jet située dans le corps de pompe, et est oblique par rapport à la paroi latérale vers laquelle elle est décalée.

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