EXHAUST GAS PASSAGE STRUCTURE OF OUTBOARD ENGINE

Title:

EXHAUST GAS PASSAGE STRUCTURE OF OUTBOARD ENGINE

Document Type and Number:

WIPO Patent Application WO/2001/021943

Kind Code:

A1

Abstract:

An exhaust gas passage structure of outboard engine, wherein a split face (48¿1?) of an exhaust gas passage forming member (48) is connected to a split face (41¿2?) provided at the rear of an oil case (41) sandwiched between an engine block (11) and an extension case (42), a main exhaust gas expansion chamber (e3) and an auxiliary exhaust gas expansion chamber (e7) are formed between the exhaust gas passage forming member (48) and the oil case (41), the exhaust gas supplied from a first exhaust gas passage (e1) of the oil case (41) is exhausted to a second exhaust gas passage (e5) of the oil case (41) through the main exhaust gas expansion chamber (e3), and a part of the exhaust gas in the main exhaust gas expansion chamber (e3) is exhausted from an exhaust gas outlet (e8) to the air through a communication port (e6) and the auxiliary exhaust gas expansion chamber (e7), whereby the exhaust gas expansion chambers (e3, e7) can be exposed by merely separating the exhaust gas passage forming member (48) from the oil case (41) so that the maintenance can be performed without disassembling the oil case (41) and the maintainability can be increased remarkably.

Inventors:

YOSHIDA HIROYUKI (JP)
IKUMA TOMONORI (JP)
TAKADA HIDEAKI (JP)

Application Number:

PCT/JP2000/006533

Publication Date:

March 29, 2001

Filing Date:

September 22, 2000

Export Citation:

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Assignee:

HONDA MOTOR CO LTD (JP)
YOSHIDA HIROYUKI (JP)
IKUMA TOMONORI (JP)
TAKADA HIDEAKI (JP)

International Classes:

F01N3/28; F01N13/00; F01N13/08; F01N13/18; F02B61/04; (IPC1-7): F01N7/18

Foreign References:

JPS63212199A	1988-09-05
JPH0781686A	1995-03-28
JPH06159073A	1994-06-07

Other References: