Electricity: measuring and testing – Magnetic – Displacement
Reexamination Certificate
2005-05-10
2005-05-10
LeDynh, Bot (Department: 2862)
Electricity: measuring and testing
Magnetic
Displacement
C324S207250
Reexamination Certificate
active
06891364
ABSTRACT:
A sensor arrangement for recording the movement of an armature on an electromagnetic actuator for operating a control element, in particular for operating a gas exchange valve of an internal combustion engine, has an axially displaceable bar-like sensor piece, made from a soft magnetic material, having a ring of electrically conducting material of low ohmic resistance. The sensor piece is connected to the control element and to a fixed coil arrangement surrounding the bar-like sensor arrangement at least over a partial length, the coil arrangement comprising at least two coils, arranged one behind the other and connected to a voltage supply and a signal recorder in the form of a carrier frequency measuring bridge, whereby the bar-like sensor piece reduces interfering voltages.
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Asmus Günther
Boie Christian
Kather Lutz
Kemper Hans
FEV Motorentechnik GmbH
LeDynh Bot
Venable LLP
Voorhees Catherine M.
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