Preinjection valve for controlling the fuel inflow of a fuel injection valve
US6520143B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 7, 2001 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | May 7, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7928
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A preinjection valve with a valve body, in which an inlet conduit is embodied which can be filled with fuel at high pressure via a high-pressure pump. An outlet conduit is embodied in the valve body and discharges laterally into the inlet conduit and communicates with a fuel injection valve via a high-pressure line. A preinjection valve member is guided sealingly in the inlet conduit and is moved counter to a closing force by the fuel pressure in the inlet conduit and after executing a preinjection stroke (hv) comes to rest on a deflection valve member guided, likewise sealingly, in the inlet conduit. By the motion of the preinjection valve member, a preinjection quantity is pumped into the outlet conduit and delivered to the fuel injection valve. When a main injection pressure in the inlet conduit is attained, the deflection valve member is moved by the fuel pressure until, on traversing an opening stroke (h0), the communication from the inlet conduit into the outlet conduit is opened, and fuel can flow to the fuel injection valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.