SUCTION NOISE REDUCTION DEVICE

Title:

SUCTION NOISE REDUCTION DEVICE

Document Type and Number:

WIPO Patent Application WO/2014/136666

Kind Code:

A1

Abstract:

Provided is a suction noise reduction device that can suppress noise within an air suction tube. The suction noise reduction device (100) is provided with a rectifying net (110) that rectifies a flow of air and is disposed at the downstream side of a throttle valve in the air suction tube, and the suction noise reduction device is characterized by the rectifying net (110) having the configuration of more minute openings in the vicinity of the center of the duct within the air suction tube, and openings that become coarser with distance from the vicinity of the center. For example, the openings in the rectifying net (110) are formed from: a plurality of radiating sections (111) extending in a radiating shape from the vicinity of the center of the duct within the air suction tube towards the outside; and a plurality of concentric circular sections (112) provided in a concentric circular shape from the vicinity of the center.

Inventors:

YOSHITSUNE SHUJI (JP)
WATANABE SHIGERU (JP)
INOUE MASAHIKO (JP)
HOSONUMA NORIMASA (JP)

Application Number:

PCT/JP2014/055015

Publication Date:

September 12, 2014

Filing Date:

February 28, 2014

Export Citation:

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Assignee:

NOK CORP (JP)

International Classes:

F16J15/12; F02M35/12; F16J15/10

Foreign References:

JP2011236853A	2011-11-24
JPH07208283A	1995-08-08
JP2009533634A	2009-09-17
JP2007247547A	2007-09-27
JP2008303751A	2008-12-18
JP2006010075A	2006-01-12
JPH11141420A	1999-05-25
JP2000291452A	2000-10-17

Other References: