Electromagnetically operating setting device
AssigneeFEV Motorentechnik GmbH
InventorsPeter Kreuter, Martin Scheidt
Life of this patent
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Abstract
With an electromagnetically operating setting device according to the principle of the spring-mass-oscillator, in particular to actuate control valves in displacement engines, the working stroke of the control element is varied by changing the position of the pole surface of a working magnet and the base of one or more springs of the spring system. To this end, a magnetic switching system serves to simultaneously change the distance of the pole surface and adapt the oscillation mid-point to the new position of the pole surface by changing the position of one or more spring bases. Furthermore, with this switching system the magnetic reluctances of one or both working magnets can also be changed.
Claims17
An electromagnetically operable setting device for at least one oscillatingly movable control element of displacement engines, comprising:
- two switching electromagnets respectively defining two switching positions corresponding to opened and closed positions of the control element;
- an armature located between said two electromagnets and in communication with at least one control element;
- a spring system for moving said armature between the two switching positions to actuate the control element between opened and closed positions defining a working stroke therebetween, said spring system comprising at least one spring having an initial equilibrium position located approximately at the center of the two switching positions;
- and
- a magnetic switching system for moving the position of a pole surface of one of said electromagnets and simultaneously changing a base position of at least one spring of said spring system to adapt the oscillation mid-point of the spring system to result in another spring system equilibrium position located approximately at the center of said moved and unmoved electromagnets, whereby the working stroke of the control element is varied.
Dependencies are inferred from the claim text.