Fuel injector with feedback control
US6837221B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2002 |
| Grant date | Jan 4, 2005 |
| Priority date | — |
| Expiry date | Jan 14, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2200/28
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An injector is provided which includes a nozzle valve element, a control volume, and an injection control valve including a control valve member for controlling fuel flow from the control volume so as to control nozzle valve movement. Importantly, the injector includes a nozzle valve lift detecting device for detecting nozzle valve lift and providing a nozzle valve element lift feedback signal. Feedback signals are improved and control valve member oscillations are minimized by positioning a valve seat associated with the control valve member a spaced distance from the control volume, positioning a drain orifice such that the nozzle valve element restricts flow through a drain circuit when in an open position and extending the control valve member from the valve seat to the control volume to form an end wall of the control volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.