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AssigneeAvl Commercial Driveline & Tractor Engineering GmbH
InventorsSTEFAN KUNTNER, GEBHARD WÖNTNER, UDO KNEITZ, ROLAND HINTRINGER, DAVID WINKLER
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The invention relates to a hydraulic circuit (1) of a torque transmission device, wherein at least two, in particular closed in a non-actuated state (normally closed), clutches (2, 3) of the torque transmission device can be element (12, 13) of the hydraulic circuit, wherein in a clutch opening state, every clutch valve element (12, 13) is connected to a high-pressure line (30) that is applied with the pressure of a high-pressure hydraulic accumulator (31) and/or generator (32), by means of a pressurisation line (22, 23) for the deflection of the clutch (2, 3), and in a closing state, same is connected to a low-pressure tank (40) by means of a tank line (42, 43, 44, 45, 46, 47, 48, 49) for releasing a deflection pressure, and wherein the tank lines (42, 43, 44, 45, 46, 47, 48, 49) of the clutch valve elements (12, 33) are guided to a safety valve (50), in particular by means of a common collection tank line (41), which safety valve can be switched in such a way that the tank lines (42, 43, 44, 45, 46, 47, 48, 49) can be applied with the pressure of the high-pressure line (30).
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A hydraulic circuit, especially of a torque transmission device, comprising two hydraulic clutch valve elements which are each configured for switching at least two clutches of the torque transmission device, wherein each clutch valve element is connected in a clutch opening state by means of a pressurisation line for deflecting the clutch to a high-pressure line that is applied with the pressure of a high-pressure hydraulic accumulator and/or a generator, and is connected in a closed state to a low-pressure tank by means of a tank line for releasing a deflection pressure, wherein the tank lines of the clutch valve elements are guided to a safety valve, which safety valve can be switched in such a way that the tank lines can be applied with the pressure of the high-pressure line.
A method for controlling a hydraulic circuit of a torque transmission device comprising two hydraulic clutch valve elements which are each configured for switching at least two clutches of the torque transmission device, wherein each clutch valve element is connected in a clutch opening state by means of a pressurisation line for deflecting the clutch to a high-pressure line that is applied with the pressure of a high-pressure hydraulic accumulator and/or a generator, and is connected in a closed state to a low-pressure tank by means of a tank line for releasing a deflection pressure, wherein the tank lines of the clutch valve elements are guided to a safety valve, which safety valve can be switched in such a way that the tank lines can be applied with the pressure of the high-pressure line, wherein
Dependencies are inferred from the claim text.