EXHAUST DEVICE FOR INTERNAL COMBUSTION ENGINE

WIPO Patent Application WO/2011/024234

A1

An exhaust device for an internal combustion engine eliminates the need for mounting a sub-muffler to a tail pipe and the need for mounting to an upstream opening end of the tail pipe a muffler equipped with a resonance chamber having a large capacity, suppresses an increase in a sound pressure level caused by air column resonance in the tail pipe, has a reduced weight, can be manufactured at reduced cost, and requires a reduced installation space.  An exhaust device for an internal combustion engine is provided with an exhaust pipe (28) for discharging, to the atmosphere, exhaust gas discharged from an internal combustion engine (21).  The exhaust pipe (28) is provided with an upstream opening end (28a) connected to a muffler (27), and also with a downstream opening end (28b) for discharging to the atmosphere the exhaust gas discharged from the muffler (27).  A diameter expanding structure (38) having a diameter expanded toward the upstream end opening (28a) or the downstream end opening (28b) is provided to at least the upstream side or the downstream side of the exhaust pipe (28) in the discharge direction of the exhaust gas.  A plate (41) having an opening (41d) formed therein is provided inside the diameter expanding structure (38) so as to be opposed to the discharge direction of the exhaust gas.

JP2005139918	SILENCER EQUIPPED WITH ELECTRONIC CONTROL VALVE
JPS59156104	[Title of the device] The muffler for cars

WAKATSUKI KAZUTOSHI (JP)

PCT/JP2009/004227

March 03, 2011

August 28, 2009

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TOYOTA MOTOR CO LTD (JP)
WAKATSUKI KAZUTOSHI (JP)

F01N1/08; F01N13/08; F01N13/20

JP2002089230A	2002-03-27
JPS5943916A	1984-03-12
JPS5823929Y2	1983-05-23
JPH055213Y2	1993-02-10
JPS54166624U	1979-11-22

ARIGA, GUNICHIRO (JP)
Ariga army Ichiro (JP)

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