Fuel injector
US6340121B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 15, 2000 |
| Grant date | Jan 22, 2002 |
| Priority date | — |
| Expiry date | Sep 15, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2547/003
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injector comprising a nozzle body defining a first bore and an inwardly opening valve member slidable within the first bore, the valve member being engageable with a first seating to control fuel delivery through a first outlet opening provided in the nozzle body. The valve member is provided with a second bore within which an outwardly opening valve needle is slidable, the valve needle being engageable with a second seating to control fuel delivery through a second outlet opening provided in the valve needle. The fuel injector also comprises first and second control chambers for fuel, whereby fuel pressure within the first and second control chambers controls movement of the valve member and the valve needle away from their respective seatings so as to permit fuel delivery through a selected outlet opening. The valve needle may define a flow passage for fuel which communicates with a delivery chamber such that, when the valve needle is moved away from the second seating, fuel within the delivery chamber is able to flow through the flow passage for delivery through the second outlet opening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.