Shutdown pressure relief valve for common rail fuel system
US9133806B2 · kind B2 · utility
0Cited by
4References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 25, 2012 |
| Grant date | Sep 15, 2015 |
| Priority date | — |
| Expiry date | Apr 16, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7781
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A passive hydraulically actuated non-electric shutdown pressure relief valve relieves pressure in the high pressure volume of a low static leak common rail fuel system after shutdown. When the common rail fuel system is in operation, a transfer pump provides medium pressure to hold the shutdown pressure relief valve closed. At shutdown, the residual medium pressure downstream from the transfer pump decays back to tank, and the residual high pressure trapped in the common rail and fuel injectors pushes open the shutdown pressure relief valve to release the high pressure after back to tank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.