Fuel injector with a control rod controlled by the fuel pressure in a control chamber
US6575384B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 21, 2001 |
| Grant date | Jun 10, 2003 |
| Priority date | — |
| Expiry date | Aug 15, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2547/003
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The injector has a control rod controlled by the fuel pressure in a control chamber, and a nozzle having an injection chamber supplied with pressurized fuel for injection. The nozzle has at least one injection orifice normally closed by a pin connected to the rod and activated by the fuel pressure in the injection chamber. The control chamber has a pressurized-fuel intake conduit, and a fuel discharge conduit which is normally closed and is opened for a variable length of time depending on the amount of fuel to be injected. The pin and the rod, and/or the intake conduit and the discharge conduit, are so sized as to keep the pin and the rod hydraulically balanced in the maximum-lift position to open the orifice.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.