Valve for dosing liquids or gases

Details Valve for dosing liquids or gases Valve for dosing liquids or gases

1986-07-29

1988-06-14

Rosenthal, Arnold

Valves and valve actuation

Electrically actuated valve

Having element dimensionally responsive to field

2391022, F16K 3102, F16K 152

Patent

active

047507063

ABSTRACT:
A valve for dosing liquids, or gases, particularly an injection valve for fuel injection systems of internal combustion engines, such as directly injecting diesel motors and the like, the valve comprises a valve housing having a dosing opening, a valve needle which controls the dosing opening, a valve closing spring cooperating with the valve needle and withdrawing the latter to a closing position in which the valve needle closes the dosing opening, a pizeoelectric adjusting member having a piezo stack which is longitudinaly changeable under the action of a control voltage, the piezo stack having two ends and being connected by its one end with a valve needle, an abutment connected with the other end of the piezo stack, the abutment being displaceable in an axial direction of the piezo stack and formed so that during a longitudinal change of the piezo stack caused by the control voltage it is spatially fixed relative to the housing, the abutment being formed as an electromagnetic arresting arrangement which is actively switched on at least during a time of opening of the valve.

REFERENCES:
patent: 4494727 (1985-01-01), Babitzka et al.
patent: 4584980 (1986-04-01), Weiger et al.

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