Mahle International Gmbh

Rainer Otto

Alfred Elsässer

Jens Baumbach

Wolfgang Schilling

Jan Schmidt

Frank Beyer

Eberhard Kallenbach

Dietmar Türpe

A piston engine (), in particular in a motor vehicle, has a plurality of cylinders () whose combustion chambers () are connected to a fresh gas system (). The fresh gas system () has two gas paths, namely a full-load path () and a partial-load path (), for at least one of the cylinders (), through which the fresh gas () can be supplied to the respective combustion chamber (). To this end, a valve arrangement () at the intake end is provided for controlling the fresh gas stream through the gas paths () into the respective combustion chamber (). For actuation of the valve arrangement (), a control unit () is provided, the control unit being designed so that it permanently blocks the full-load path () through appropriate control of the valve arrangement () at partial load and actuates the partial-load path () for controlling the fresh gas stream and through appropriate control of the valve arrangement () at full load, it actuates at least the full-load path () for controlling the fresh gas stream.

Piston engine

The present invention relates to an electromagnetic actuator drive () for adjusting an actuator drive among at least three positions, comprising a soft magnetic armature () which is drive-coupled to the final controlling element and has a plurality of armature faces (), a plurality of soft magnetic pole elements () having a plurality of pole faces () on which the armature faces () come to rest in two end positions of the armature () a restore position () which drives the armature () by spring force into a horizontal starting position, and a holding device () with the help of which the armature () can be secured in its end positions by electromagnetic forces. To implement the actuator drive () less expensively, an even number of at least four pole elements () may be provided, a separate electromagnetic coil () being assigned to each pole element () and electric power being applied to the holding device () for securing the armature () in its end positions, the holding device applying electric current to the coils () so that the pole faces () of adjacent pole elements () are oppositely polarized.

Electromagnetic actuator drive

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Erfurt, Germany

Rainer Otto