Sound increase apparatus
AssigneesNissan Motor Co., Ltd., Mahle Filter Systems Japan Corporation
InventorsHiroyuki Abe, Hiromichi Akamatsu, Akira Sasaki, Masashi Shinada, Yuta Saito
Life of this patent
Estimating the term…
Abstract
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.
Claims9
A sound increase apparatus comprising:
- a partition wall adapted to divide an engine room into a first engine room space which is located on a side of a dash panel and in which no engine is installed and a second engine room space in which an engine is installed;
- a first pressure fluctuation amplification unit, including one end which communicates with an engine inlet pipe arranged in the second engine room space and another end which opens in the first engine room space, wherein
- the first pressure fluctuation amplification unit is adapted to amplify 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.
A sound increase apparatus comprising:
- a partition wall adapted to divide an engine room into a first engine room space which is located on a side of a dash panel and in which no engine is installed and a second engine room space in which an engine is installed;
- and
- first pressure fluctuation amplification means, including one end which communicates with an engine inlet pipe arranged in the second engine room space and another end which opens in the first engine room space, for amplifying 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.
Dependencies are inferred from the claim text.