SOUPAPE A ELECTRO-AIMANT, NOTAMMENT POUR LES SOUPAPES D'ADMISSION ET LES SOUPAPES D'ECHAPPEMENT DE MOTEURS A COMBUSTION INTERNE

摘要

The invention pertains to a magnet valve. The magnet valve has a ferromagnetic coil body with a winding and defines first and second terminal positions. An armature for driving a valve is displaceably disposed in the ferromagnetic coil body between the first terminal position and the second terminal position. The magnet valve also has a housing with a support and a spring is braced between the armature and the support. The magnet valve further has a piezoelectric measuring instrument disposed between the spring and the support for detecting a position of the armature. The measuring instrument provides an output signal which is dependent on a spring force of the spring. In turn, the spring force is associated with a position of the armature. The actual speed of the armature is determined from the position of the armature and the actual speed of the armature is used to regulate a future speed of the armature.