MUFFLER FOR MOTOR VEHICLE

Title:

MUFFLER FOR MOTOR VEHICLE

Document Type and Number:

WIPO Patent Application WO/2004/059134

Kind Code:

A1

Abstract:

A muffler for a motor vehicle, provided in an exhaust gas passage of an internal combustion engine mounted on a motor vehicle. The muffler is downsized with its performance maintained and exhibits appropriate gas-exhausting characteristics in accordance with traveling condition of the vehicle. The muffler comprises a casing body as an outermost shell; an exhaust gas lead-in pipe forming an end portion of the exhaust gas passage, having an extension portion extending into the casing body, and having small holes in the extension portion; a finisher positioned on a line extended from the exhaust gas lead-in pipe, and constructed from an inside portion positioned in the casing body and an outside portion extending from the casing body; a sound-muffling mechanism comprising expansion chambers and a throttle mechanism, the expansion chambers being defined by at least one pipe member and arranged at predetermined intervals at the radially outside of the extension portion of the exhaust gas lead-in pipe and of the inside portion of the finisher; and a valve mechanism provided at the end portion of the exhaust gas lead-in pipe, and opening and closing the communication between the exhaust gas lead-in pipe and the finisher when the pressure of an exhaust gas in the exhaust gas lead-in pipe is equal to or more than a predetermined value.

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JPH0742852	[Title of the Invention] A muffler having a scavenging promoting effect
JPS585046	[Title of the device] Silencer

Inventors:

ICHIKAWA HIROYUKI (JP)
MOCHIZUKI SUMITO (JP)
OKANO TAKUMI (JP)
OKUMA SHINYA (JP)

Application Number:

PCT/JP2003/016663

Publication Date:

July 15, 2004

Filing Date:

December 25, 2003

Export Citation:

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Assignee:

APEX CO LTD (JP)
ICHIKAWA HIROYUKI (JP)
MOCHIZUKI SUMITO (JP)
OKANO TAKUMI (JP)
OKUMA SHINYA (JP)

International Classes:

F01N1/08; F01N1/10; F01N1/16; (IPC1-7): F01N1/08

Foreign References:

JPH051816U	1993-01-14
JPS5583215U	1980-06-09
JPS5064854U	1975-06-12
JPH0673309U	1994-10-18

Attorney, Agent or Firm:

Onuki, Kazuyasu (8-8 Shibuya 1-chom, Shibuya-ku Tokyo, JP)

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