Fuel injector with pressure balancing valve
US7353806B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 6, 2006 |
| Grant date | Apr 8, 2008 |
| Priority date | — |
| Expiry date | Sep 6, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2200/706
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injector device, for injecting fuel into a combustion chamber of an internal combustion engine, has a nozzle valve and nozzle valve control assembly adapted to use a control valve and high pressure fuel in the fuel injector in order to actuate movement of the nozzle valve between an open position to inject fuel and a closed position to terminate fuel injection. The nozzle valve control assembly employs a pressure balancing control valve so that the fuel pressure exerts a zero net force on the control valve in a dimension along which the control valve moves. Thus, the actuation occurs independently of the fuel pressure. In addition, the actuator is operably connected to the control valve by at least a hydraulic linkage, where the hydraulic linkage compensates for changes in the actuator and the injector body due to changes in temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.