Cam assisted common rail fuel system and engine using same
US7584747B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2008 |
| Grant date | Sep 8, 2009 |
| Priority date | — |
| Expiry date | Mar 26, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M63/029
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel system for an internal combustion engine includes a plurality of nozzle groups and a plurality of pump groups. A common rail is fluidly connected with each of the nozzle groups, and each of the pump groups includes a mechanically actuated pressure intensifier having a tappet which can selectively intensify a fuel injection pressure in a corresponding one of the nozzle groups. Each of the mechanically actuated pressure intensifiers is movable in response to rotation of a cam, and includes a spill valve having a first position at which fuel is displaced from the pump group to a low pressure space and a second position at which fuel is displaced to a corresponding one of the nozzle groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.