EXHAUST DEVICE

WIPO Patent Application WO/2012/090238

A1

The present invention addresses the problem of providing an exhaust device which renders unnecessary the installation of a sub-muffler on a tailpipe and the installation of an exhaust passage opening/closing mechanism on the main muffler, and which is capable of reducing the particle velocity of exhaust sound of a specific frequency due to air column resonance occurring in an exhaust system, and reducing the weight and the manufacturing cost, by means of a simple construction. The exhaust device is equipped with an outlet pipe (33) having an exhaust passage (61c) that circulates exhaust gas from an inlet aperture end to an atmosphere aperture end (61b) which exhausts the exhaust gas into the atmosphere. In addition, the exhaust device has: a partition member (62) that divides the exhaust passage (61c) into a large passage (61f) and a small passage (61g); a connecting member (63) equipped with a connecting hole (63a) that connects the large passage (61f) and the exhaust passage (61c); a pivot shaft (64) attached to the wall part of outlet pipe (33); and a valving element (65) that is subjected to the flow of exhaust air and therefore swings around the pivot shaft (64) so as to change the flow volume of the exhaust gas passing through the connecting hole (63a).

TAKAGAKI NAKAYA (JP)

PCT/JP2010/007538

July 05, 2012

December 27, 2010

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TOYOTA MOTOR CO LTD (JP)
TAKAGAKI NAKAYA (JP)

F01N1/06; F01N1/16; F01N13/08

JPS5864814U	1983-05-02
JPS5490522U	1979-06-27

ARIGA, Gunichiro et al. (JP)
Ariga Army Ichiro (JP)

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