Outboard engine exhaust structure

Power plants – Internal combustion engine with treatment or handling of... – Common receiver having inlets from plural cylinder

Reexamination Certificate

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Reexamination Certificate

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07047732

ABSTRACT:
An exhaust structure for use in an outboard engine of a vertical-type four-cycle V-type having cylinder heads, a crankcase, cylinder blocks constituting left and right sides of an integral body disposed in a V shape as seen in a plan view and forming a V-bank therebetween, an intake system disposed in the V bank, exhaust systems disposed on the left and right sides outside the V-bank, and a crankshaft disposed substantially vertically to the surface formed where the crankcase and cylinder blocks join one another, wherein the engine is disposed above an engine support attached to the hull and an oil pan is disposed beneath the engine support. The exhaust systems join and become integral inside the engine support and then pass through the interior of the oil pan to discharge exhaust gases. The invention provides an outboard engine exhaust structure having a non-complex oil pan of sufficient capacity.

REFERENCES:
patent: 5388555 (1995-02-01), Shiomi et al.
patent: 5613470 (1997-03-01), Shiomi et al.
patent: 5704819 (1998-01-01), Isogawa
patent: 5822985 (1998-10-01), Yoshimura
patent: 5855495 (1999-01-01), Kubo
patent: 5893783 (1999-04-01), Hiraoka et al.
patent: 6186846 (2001-02-01), Takayanagi
patent: 6511356 (2003-01-01), Yukishima
patent: 09-041934 (1997-02-01), None
patent: 2000-310108 (2000-11-01), None

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