Motor vehicle drive train comprising a hydrodynamic retarder that can be disengaged, and control method therefor
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United States of America Patent
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Mar 22, 2016
Grant Date -
Nov 6, 2014
app pub date -
Nov 28, 2012
filing date -
Dec 9, 2011
priority date (Note) -
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Abstract
A motor vehicle drive train including a hydrodynamic retarder (1) that comprises a revolving bladed impeller (10) and a stationary or counter-rotating bladed turbine (11) which jointly form a working chamber (12) that can be filled with a working medium to switch on the retarder (1) is disclosed. The hydrodynamic retarder (1) can be mechanically disengaged from the drive train by a disconnect clutch (2). A fill level monitoring device (14) can detect the current fill level of the working medium in the working chamber (12), while a disconnect clutch-blocking device (9) is effectively connected in a communicating or mechanical manner to the fill level monitoring device (14) and prevents the disconnect clutch (2) from engaging in accordance with the detected fill level.
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