Variable geometry resonator for acoustic control
US7337877B2 · kind B2 · utility
14Cited by
14References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2004 |
| Grant date | Mar 4, 2008 |
| Priority date | — |
| Expiry date | May 16, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M35/1261
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The present invention provides a resonator for attenuating acoustic vibration from an air intake passage. The resonator includes a neck, a resonator chamber, a piston-type member, and an actuator. The neck is attached between the air passage and the resonator chamber. The neck has two overlapping portions allowing the neck to extend within the resonator chamber. The piston-type member is located within the resonator chamber and is translated by the actuator to change the volume of the resonator and the neck length. By changing the volume and neck length of the resonator, the frequency attenuated by the resonator can be adjusted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.