Marine propulsion – Means for accomodating or moving engine fluids – Means for handling exhaust gas
Patent
1992-06-03
1995-06-06
Oberleitner, Robert J.
Marine propulsion
Means for accomodating or moving engine fluids
Means for handling exhaust gas
416 93A, B63H 2132
Patent
active
054217563
ABSTRACT:
The present invention provides an exhaust gas discharge system for a watercraft. The system has a first discharge path, including a first outlet, primarily for use during high speed vessel operation and a second discharge path, including a second outlet, for use during both low and high speed vessel operation. The first outlet is arranged to constantly remain below a water surface level of a body of water within which the watercraft is operated, while the second outlet is arranged to locate above the water level surface during high speed vessel operation and to locate below the body of water, at a level higher than the first outlet, during idle and low speed vessel operation. Additionally, the second discharge path has an exhaust flow sectional area of a size at least as large as the exhaust flow sectional area of the first discharge path. The system is capable of discharging exhaust gases in a smooth, efficient manner, and is comprised of a relatively simple structure.
REFERENCES:
patent: 4831822 (1989-05-01), Yoshimura
patent: 4831954 (1989-05-01), Kinouchi
patent: 4861296 (1989-08-01), Wlezien
patent: 4887692 (1989-12-01), Outani
patent: 4957461 (1990-09-01), Nakayama
Bartz Clifford F.
Oberleitner Robert J.
Yamaha Hatsudoki Kabushiki Kaisha
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