Device for supplying high pressure fuel to an internal combustion engine
US7011256B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2001 |
| Grant date | Mar 14, 2006 |
| Priority date | — |
| Expiry date | Dec 7, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M61/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A device for supplying fuel at high pressure to an internal combustion engine, having a pistonlike element which is disposed longitudinally displaceably in a bore of a component. The pistonlike element is guided with a sealing portion in a guide portion of the bore, and the guide portion discharges at one end into a pressure chamber that can be filled with fuel at high pressure and at the other end into a leak fuel chamber. At least one channellike recess is embodied on the sealing portion of the pistonlike element, or the guide portion and this recess communicates hydraulically with the pressure chamber and is sealed off from the leak fuel chamber, except for the annular gap formed between the pistonlike element and the inner wall of the guide portion, and as a result the pistonlike element is hydraulically centered in the bore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.