Valeo Systemes De Controle Moteur

Johnson Controls Technology Company

Mahmoud Sfaxi

Emmanuel Talon

Christophe Maerky

A magnetic angular-position sensor is mounted between two carrier elements that are movable in rotation relative to each other about an axis of rotation. The sensor has firstly a magnetic body defining a working zone in which there extends a magnetic field having field lines perpendicular to the axis of rotation, and secondly a detector member having at least one probe extending in the working zone of the magnetic member in order to provide a signal as a function of the angular orientation of the probe relative to the field lines in the working zone. The magnetic member has two parallel magnet segments and two elongate pole pieces of ferromagnetic material extending perpendicularly to the magnet segments and covering the ends thereof.

Magnetic angular-position sensor

An electromagnetic actuator including an actuating member associated with an armature and able to move between two extreme positions under the action of an elastic member and two electromagnets that attract the armature to one of the extreme positions, where the electromagnets each include a coil, a core for channeling a flux of the coil so that it forms a return path in the armature, and permanent magnets associated with the core so that the latter channels a flux of the permanent magnets so that it forms a return path in the armature, where the permanent magnets of one of the electromagnets exert a force on the armature sufficient to retain the armature in the associated extreme position against the springs, and where the permanent magnets of the other electromagnet exerts a force on the armature insufficient to retain the armature in the associated extreme position against the springs.

Electromagnetic actuator with two electromagnets comprising magnets having different forces and method of controlling an internal combustion engine valve using same

An electromagnetic actuator includes a coil, a core designed to channel a flux of the coil so as to form a return path in an armature, the core having a base from which branches extend, including a central branch around which the coil extends, and two permanent magnets associated with the core so that the latter channels a flux of the permanent magnets so as to form a return path in the armature, the flux of the coil passing through the magnets. The two permanent magnets are placed in the central branch of the core so as to form a V, which separates the central branch into a support part, which supports the permanent magnets and is integral with the base, and an end part lying above the permanent magnets. The end part has an active face facing the armature in which a groove lies parallel to the permanent magnets.

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Paris, France

Mahmoud Sfaxi