Servo valve for an injection nozzle
US5819710A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 25, 1996 |
| Grant date | Oct 13, 1998 |
| Priority date | — |
| Expiry date | Oct 25, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M63/0036
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A servo valve for an injection nozzle includes a housing having a valve chamber, a high-pressure opening, a connecting opening and a return opening. The valve chamber movably accommodates a valve member which can be displaced by actuating means to bear selectively against a first seat and a second seat. The valve member, when bearing against the first seat, closes the return opening and connects the high-pressure opening to the connecting opening. When bearing against the second seat it closes the high-pressure opening and connects the connecting opening to the return opening. The connecting opening is connected to a working chamber of the injection nozzle whose nozzle is closed when the working chamber is subjected to high pressure and opens upon a drop in pressure in the working chamber. The actuating means includes a component which varies in length when electrically actuated and which is connected to the valve member through the return opening by way of an actuating member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.