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AssigneeJohnson Controls Automotive Electronics
InventorsJean-Pierre Peghaire, Calogero Fiaccabrino, Yves Porcher
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A ferromagnetic actuator having, in a housing, a ferromagnetic circuit defining an axial travel interval for an armature (22) of ferromagnetic material for axially driving a rod between two extreme positions in which the armature bears against poles of the ferromagnetic circuit, resilient return means provided to hold the valve at rest in a middle position between the extreme positions, and at least one coil carried by the circuit and enabling the armature to be brought in alternation into both positions. The rod carries a radially-magnetized bar of length not less than the travel distance of the armature, and the housing carries at least one magnetic flux sensor placed in a zone having low exposure to the field created by the coil(s).
An electromagnetic actuator having, in a non-magnetic housing, a ferromagnetic circuit defining an axial travel interval for an armature of ferromagnetic material for axially driving a rod between two extreme positions in which the armature bears against poles of the ferromagnetic circuit, resilient return means provided to hold the armature at rest in a middle position between the extreme positions, and at least one coil carried by the circuit enabling the armature to be brought in alternation into both positions, wherein at least one of the rod or the housing carries a radially-magnetized bar having a length not less than the travel distance of the armature for producing a position detecting flux and the other of the housing or the rod carries at least one magnetic flux sensor coupled to plates of ferromagnetic material for axially channeling the position detecting flux into the magnetic flux sensor, wherein the rod is made of non-magnetic material and the magnetized bar is fixed to a magnetic flux return plate extending on a side of the magnetized bar opposite to the magnetic flux sensor.
An electromagnetic actuator having, in a non-magnetic housing, a ferromagnetic circuit defining an axial travel interval for an armature of ferromagnetic material for axially driving a rod between two extreme positions in which the armature bears against poles of the ferromagnetic circuit, resilient return means provided to hold the armature at rest in a middle position between the extreme positions, and at least one coil carried by the circuit enabling the armature to be brought in alternation into both positions, wherein at least one of the rod or the housing carries a radially-magnetized bar having a length not less than the travel distance of the armature for producing a position detecting flux and the other of the housing or the rod carries at least one magnetic flux sensor coupled to plates of ferromagnetic material for axially channeling the position detecting flux into the magnetic flux sensor wherein the plates have an axial length on either side of the sensor which is substantially equal to the length of the radially-magnetized bar.
An electromagnetic actuator having in a non-magnetic housing, a ferromagnetic circuit defining an axial travel interval for an armature of ferromagnetic material for axially driving a rod between two extreme positions in which the armature bears against poles of the ferromagnetic circuit, resilient return means provided to hold the armature at rest in a middle position between the extreme positions, and at least one coil carried by the circuit enabling the armature to be brought in alternation into both positions, wherein at least one of the rod or the housing carries a radially-magnetized bar having a length not less than the travel distance of the armature for producing a position detecting flux and the other of the housing or the rod carries at least one magnetic flux sensor coupled to plates of ferromagnetic material for axially channeling the position detecting flux into the magnetic flux sensor further comprising two sensors placed symmetrically about the rod and biased so as to provide working signals of opposite polarities applied to inputs of a subtracter.
An electromagnetic valve actuator comprising:
Dependencies are inferred from the claim text.