Injection valve for a fuel-injection system of an internal combustion engine, in particular of a diesel motor
US5692683A · kind A · utility
Inventor
Key dates
| Filing date | May 1, 1995 |
| Grant date | Dec 2, 1997 |
| Priority date | — |
| Expiry date | May 1, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2200/304
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An injection valve for a fuel-injection system of an internal combustion engine, in particular of a diesel motor, has a valve housing, a multi-part valve member movably arranged in the housing, and at least one inlet opening terminating in a working cylinder, through which opening fuel is fed from a pressure chamber and which is provided for controlling the valve member by means of an electromagnetic valve. The multi-part valve member is enclosed by a damping chamber filled with fuel in the contact area between its nozzle needle that controls the injection opening and the at least one valve-member part lying thereabove. On one side, approximately clearance-free positioning fits are connected in front of or rather after the damping chamber with one formed between the nozzle needle and the valve housing and on the other side, one being formed between the valve-member part and the valve housing. When the injection valve is closed, a support providing spring force acting on the valve-member part guides same against the nozzle needle until their front sides contact one another, while these move apart when the injection opening is open due to the fuel flowing with a limited flow from the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.