Johnson Controls Automotive Electronics

Yves Porcher

Calogero Fiaccabrino

Lucien Donce

Jean-Pierre Peghaire

Thierry Lanoe

A ferromagnetic actuator having, in a 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 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).

Electromagnetic linear actuator with position sensor

The electromagnetic valve actuator has an armature ( ) of ferromagnetic material fixed to the stem of the valve, springs are provided to hold the valve at rest in a middle position between a fully open position and a closed position, and a single coil ( ) is mounted on a ferromagnetic circuit. In combination with the armature, the magnetic circuit presents two stable magnetic flux paths both of which correspond to an airgap of small size.

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Le-Plessis-Bouchard, France

Yves Porcher