Hydraulic actuating device for a positive-locking shifing element of a transmission
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United States of America Patent
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Aug 28, 2018
Grant Date -
Jun 16, 2016
app pub date -
Dec 16, 2015
filing date -
Dec 16, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A hydraulic actuating device is provided for a positive-locking shifting element of a transmission with a cylinder, in which a piston is arranged in a manner displaceable between a first end position and a second end position. The piston is a stepped piston and, with the cylinder, bounds an additional pressure chamber, which is connected to a first pressure chamber and/or a second pressure chamber through at least one hydraulic line. The volume of the additional pressure chamber decreases during an actuating movement of the piston in the direction of the first end position and increases during an actuating movement of the piston in the direction of the second end position. The degree of locking of the connection between the additional pressure chamber and the first pressure chamber and/or the second pressure chamber increases through the cylinder from a defined actuating path of the piston prior to reaching the first end position up to the first end position.
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