Reducing acoustic noise of an engine having electromechanical valves
US7104243B2 · kind B2 · utility
3Cited by
5References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 17, 2005 |
| Grant date | Sep 12, 2006 |
| Priority date | — |
| Expiry date | Feb 17, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A system and method for controlling randomly operable valves in an engine is presented. According to the method, valve lift is used to create a Helmholtz resonator from a deactivated cylinder. The method can reduce engine pressure based audible noise for variable displacement engines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.