Wabco Gmbh

Zf Cv Systems Global Gmbh

Dennis Reimann

Heinrich Diekmeyer

Frank-Dietmar Lippelt

Robert Sohn

Detlev Eggebrecht

Stefan Groetzinger

Kevin Pendzich

Yves Hansen

Hauke Karstens

Romain Poux

Martin Sack

Timo Gerlach

Rodmar Rüter

Gabriele Lindhorst

Mohammad-Reza Ghafari

A sensor arrangement () for an automated transmission includes multiple axially parallel shift rails () being axially displaceable by associated shift actuators (). The sensor arrangement () has multiple displacement sensors () made up of a signal transmitter () attached to a shift rail and a signal receiver () fixedly arranged on a housing. The signal transmitters are in the form of a permanent magnet, and the signal receivers are in the form of a 3D Hall sensor. To detect an external magnetic interference field, which can corrupt the sensor signals from the displacement sensors (), the signal transmitters () have identical axial alignments of their magnetic poles, and the signal receivers () are in a common plane () that is horizontal in their installation position.

Sensor arrangement for an automated transmission and method for detecting a magnetic interference field

A piston-cylinder assembly () has a cylindrical housing (), with a main piston () and at least one trailing piston (). The trailing piston () is axially guided on a cylindrical outer lateral face () of the main piston (). The trailing piston () has a thrust portion () at one end near a piston web on the main piston, The thrust portion extends axially inward toward the piston web () A travel limiter () on the cylindrical housing limits a travel range of the trailing piston () Under pressure, the trailing piston () follows the main piston () until the trailing piston () hits the travel limiter (). The thrust portion () of the trailing piston () is shaped to fit into an associated recess () in the piston web with a positive lock.

Piston-cylinder assembly

An actuator () for an automated or automatic transmission has a cylinder housing (), a piston unit (), and a piston rod (). The piston unit () is coupled to the piston rod () and is arranged movably in the cylinder housing () along a longitudinal axis (). The piston unit () separates two pressure chambers () of variable volume in the cylinder housing (). The pressure chambers are configured to load the piston unit () with compressed air on both sides. The two pressure chambers () are connected to a valve unit () for switching between pressurization and purging of each of the two pressure chambers (). An end stop clamping device for damping at least one end stop of the piston unit () is arranged in the actuator (). A pneumatically and a mechanically operating damping stage are provided improve the end stop damping device.

Actuator for an automated or automatic transmission, and method for controlling the actuator

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Hannover, Germany

Dennis Reimann