Title:
排気管
Document Type and Number:
Japanese Patent JP7457046
Kind Code:
B2
Abstract:
To suppress noise in a wider band frequency.SOLUTION: An exhaust pipe includes an inner pipe, an outer pipe, an opening, a closing part and at least one blocking part. The outer pipe is disposed outside the inner pipe to form a double pipe, and forms a sound attenuation chamber in a space with respect to the inner pipe. The opening is located at a first end of the double pipe, and the closing part is located at a second end of the double pipe to close the sound attenuation chamber. The blocking part is provided to separate from the opening and the closing part, and blocks the sound attenuation chamber to divide the sound attenuation chamber into a plurality of sound attenuation regions. The blocking part includes at least one flow passage communicating the sound attenuation regions with each other.SELECTED DRAWING: Figure 1
Inventors:
Masahiro Kajikawa
Yusuke Tsuzuki
Yusuke Tsuzuki
Application Number:
JP2022024774A
Publication Date:
March 27, 2024
Filing Date:
February 21, 2022
Export Citation:
Assignee:
Futaba Industry Co., Ltd.
International Classes:
F01N13/08; F01N1/02; F16L55/00
Domestic Patent References:
| JP2020112063A |
Foreign References:
| WO2014109192A1 |
Attorney, Agent or Firm:
Nagoya International Patent Attorney Corporation