Marine propulsion – Means for accomodating or moving engine fluids – Means for handling exhaust gas
Patent
1999-01-21
2000-10-24
Morano, S. Joseph
Marine propulsion
Means for accomodating or moving engine fluids
Means for handling exhaust gas
440 45, 114123, B63H 2132
Patent
active
061358347
ABSTRACT:
A personal watercraft having exhaust pipes which discharge exhaust gases to either side of the craft's hull, is disclosed The exhaust system of the personal watercraft has one or more valves which can be used to selectively direct exhaust gases to one side or the other of the hull to thereby generate a steering force to at least aid in the steering of the personal watercraft. Also disclosed, are a pair of sponsons with perforated bottoms which are attached to either side of the hull. Exhaust gases are directed into the sponsons which release exhaust gas bubbles under the waterline and thus muffle the exhaust noise. In conjunction with the sponsons, multi-compartment tuning chambers can be provided inside the hull. A method for steering a personal watercraft using exhaust gases and a method and arrangement for automatically shutting off exhaust gas flow when the craft leaves the water, are also disclosed.
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Litman Richard C.
Morano S. Joseph
Wright Andrew D.
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