Valve assembly having multiple rate shaping capabilities and fuel injector using same
US6935580B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2003 |
| Grant date | Aug 30, 2005 |
| Priority date | — |
| Expiry date | May 29, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/383
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Engineers have determined that the performance of fuel injectors, including those used in common rail fuel injection systems, can be increased, and undesirable emissions reduced, by controlling the mass flow rate of fuel injected into a combustion chamber during an injection event. While a number of fuel injectors have been developed that have limited rate shaping capabilities, the ability to produce some front end rate shapes has not been possible. In an effort to increase rate shaping capabilities, the present invention includes a valve assembly having at least one valve member that is movable between a plurality of positions to control fluid communication between a number of fluid inlets and outlets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.