Configuration and method for amplifying the pressure of fuel for a fuel injector
US6345605B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2000 |
| Grant date | Feb 12, 2002 |
| Priority date | — |
| Expiry date | Feb 25, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M57/025
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A configuration for amplifying fuel pressure for a fuel injector includes a pressure amplifier having a control space on a low-pressure side, a working space on a high-pressure side, and a moveable ram disposed between the control and working spaces. The control space is connected to an accumulator through a pressure line, and the working space is connected to a fuel line. The device includes an actuator connected to a servovalve for changing between an actuated switched state and an unactuated initial state. In the pressure line is the servovalve between the pressure supply and the control space, which opens the pressure line in the unactuated initial state, and interrupts the pressure line and keeps unpressurized the control space in the actuated switched state. A method for amplifying the fuel pressure includes: connecting the pressure supply to the pressure amplifier, and to the control space through the pressure line; connecting the working space to an injection nozzle with the fuel line; placing the servovalve in the pressure line between the pressure supply and the control space; connecting the actuator to the servovalve; opening the pressure line with the servovalve when th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.