Hydrodynamic Retarder and Method for Controlling the Power Transmission of Such a Retarder
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United States of America Patent
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Issued Date -
May 15, 2014
app pub date -
Mar 7, 2013
filing date -
Mar 7, 2012
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Abstract
The invention concerns a method for controlling the power transmission of a hydrodynamic retarder, comprising a rotating bladed rotor and a bladed stator or a bladed counter-rotor rotating against the direction of rotation of the rotor, which form together a working chamber which selectively can be filled with a working medium via an inlet and can be drained via an outlet; whereas the working chamber is filled with a working medium in braking mode, and a braking torque is generated with the hydrodynamic retarder and in a non-braking mode the working chamber is emptied of working medium down to a certain residual amount and substantially no braking torque is generated with the hydrodynamic retarder. The invention is characterised by the following step: In non-braking mode, working medium is injected into the working chamber of the hydrodynamic retarder for adjusting the residual amount, said working medium being extracted from a stock of working medium, which is provided outside the working chamber in a working medium storage tank using an idle pump.
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