Air intake silencer
US6796859B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2000 |
| Grant date | Sep 28, 2004 |
| Priority date | — |
| Expiry date | Nov 16, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M35/1244
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An air intake silencer includes an air inlet pipe and at least one tuning tube in fluid communication with the air inlet pipe. A first length and second length of the air inlet pipe and the tuning tube, respectively, are selected to produce one-half wavelength cancellation of a selected frequency of engine noise. A plurality of tuning tubes located in a wrap-around relationship with on another may tune different frequencies of noise in a compact silencing unit. The air inlet pipe and tuning tube may be integrally formed into an air intake manifold that silences one or more engine air intake inlets, and the air intake silencer may be integrated into a motor cover.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.