Fuel injection device for an internal combustion engine
US6758414B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 17, 2002 |
| Grant date | Jul 6, 2004 |
| Priority date | — |
| Expiry date | Dec 27, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2200/703
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injection device having a fuel pump for each cylinder of an internal combustion engine, which fuel pump has a pump piston that is driven in a stroke motion by the engine and delimits a pump working chamber, which is connected to a fuel injection valve that constitutes a structural unit with the fuel pump and has an injection valve member, which controls at least one injection opening and can be moved in the opening direction counter to a closing force by the pressure generated in the pump working chamber. A first electrically actuated control valve controls a connection of the line to a discharge chamber. A second electrically actuated control valve controls a connection of a control pressure chamber of the fuel injection valve to the pump working chamber, by means of which the injection valve member is at least indirectly acted on in the closing direction. The two control valves are actuated by a shared actuator, which controls the pressure prevailing in an actuator pressure chamber, which pressure acts on the respective valve members of the control valves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.