Personal watercraft with engine having exhaust collecting...

Details Personal watercraft with engine having exhaust collecting... Personal watercraft with engine having exhaust collecting...

2007-09-06

2009-12-15

Swinehart, Ed (Department: 3617)

Marine propulsion

Means for accomodating or moving engine fluids

Means for handling exhaust gas

C440S08800J

Reexamination Certificate

active

07632162

ABSTRACT:
In a personal watercraft equipped with a multi-cylinder engine including an exhaust collecting system configured to discharge an exhaust gas from the engine, the exhaust collecting system comprising a plurality of exhaust passages respectively corresponding to a plurality of cylinders provided in the multi-cylinder engine, an exhaust collecting passage which is located downstream of the plurality of exhaust passages in a flow direction of the exhaust gas and is configured to collect the plurality of exhaust passages, a water jacket formed at an outer peripheral region of each of the plurality of exhaust passages, for cooling the exhaust gas flowing in the exhaust passages, and a connecting passage configured to connect at least two of the plurality of exhaust passages.

REFERENCES:
patent: 5010731 (1991-04-01), Onishi
patent: 5997373 (1999-12-01), Asai et al.
patent: 6478645 (2002-11-01), Allbright et al.
patent: 2000-345873 (2000-12-01), None

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