Hydraulik-ring Gmbh

Thomas Schmidt

Roland Meyer

Andreas Wild

Wolfgang Weigert

Stephan Pindl

Thomas Claus

A gear actuator for engaging and disengaging gears in an automatic manual transmission has a single working piston or two working pistons provided with a first working piston surface and a second working piston surface. An auxiliary piston is provided also. A pressure control valve controls a pressure supplied to the second working piston surface. A shut-off valve is provided. The first working piston surface and the pressure valve are supplied with a system pressure of a hydraulic system. The first working piston surface and the pressure control valve can be decoupled from the system pressure of the hydraulic system by the shut-off valve.

Gear actuator for engaging and/or disengaging gears of a transmission

An actuator for gutter selection in a gear positioning device for an automatic manual transmission has a selector shaft with a selector finger. A gutter selection device is movable back and forth along an axis into a first position and a second position. The selector finger of the selector shaft can move into engagement and out of engagement with the gutter selection device. A single valve device is provided for determining the first and second positions of the gutter selection device.

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Wuppertal, Germany

Thomas Schmidt