发明名称 |
Sound increase apparatus |
摘要 |
A sound increase apparatus includes a partition wall adapted to divide an engine room for defining a first engine room space that is located on a side of a dash panel and a second engine room space in which an engine is installed, and a first pressure fluctuation amplification unit inter-communicating an engine inlet pipe arranged in the second engine room space and the first engine room space. The first pressure fluctuation amplification unit amplifies a pressure fluctuation of a first frequency selected from a plurality of frequencies when pressure of air residing inside the engine inlet pipe fluctuates at the plurality of frequencies.
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申请公布号 |
US7621370(B2) |
申请公布日期 |
2009.11.24 |
申请号 |
US20060454887 |
申请日期 |
2006.06.19 |
申请人 |
NISSAN MOTOR CO., LTD.;MAHLE FILTER SYSTEMS JAPAN CORPORATION |
发明人 |
ABE HIROYUKI;AKAMATSU HIROMICHI;SASAKI AKIRA;SHINADA MASASHI;SAITO YUTA |
分类号 |
F02B77/13;B64D33/02;F01N13/10;F02M35/10 |
主分类号 |
F02B77/13 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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