Exhaust system for watercraft
AssigneeSanshin Kogyo Kabushuki Kaisha
InventorsYoshihide Fukuda, Shigeyuki Ozawa
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Abstract
A number of exhaust systems for watercraft propelled by a propulsion unit contained within a tunnel formed in the underside of the hull. This tunnel has an opening through the side of the hull and exhaust gases are delivered to the tunnel from the engine through an exhaust system having an exhaust opening communicating with the tunnel. Various flow controlling arrangements are provided for controlling the flow through one or all of the openings so as to assist in exhaust silencing without significantly increasing back pressure.
Claims12
A watercraft comprised of a hull defining a tunnel in the underside thereof, said tunnel terminating at one end in a tunnel opening extending through the hull for directly communicating said tunnel with the atmosphere, a propulsion unit for propelling said watercraft contained within said tunnel, an internal combustion engine supported within said hull and driving said propulsion unit, said engine having at least one exhaust port, exhaust pipe means for delivering exhaust gases from said exhaust port to an exhaust opening within said tunnel, and flow control means for restrictively controlling the flow through at least said tunnel opening for controlling the communication of said tunnel with the atmosphere.
Dependencies are inferred from the claim text.