Gas silencing system with controlling sound attenuation
US4913260A · kind A · utility
37Cited by
3References
30Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 11, 1988 |
| Grant date | Apr 3, 1990 |
| Priority date | — |
| Expiry date | Jan 11, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87829
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A gas silencing system for controlled sound attenuation of the exhaust gas in a motor vehicle comprises a sound attenuation muffler for exhaust gases. The system also includes means providing a bypass passage for gas to flow around at least part of the muffler. Bypass control valve is provided to allow selective regulation of the flow of exhaust through the muffler and the pass-pipe. The bypass control valve is responsive to a modulated pressure signal controlled by the driver of the vehicle. The invention also includes circuits for visually indicating the amount of bypass flow and the sound level of gas leaving the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.