Drive train device
AssigneeDaimler AG
InventorsMichael Baraga, Gerd Jäggle, Steffen Henzler
Life of this patent
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Abstract
In a drive train device, in particular a motor vehicle drive train device, with a working fluid pressure system for providing an operating fluid pressure including at least a first and a second operating fluid pressure source connected in at least one operating state directly to the working fluid pressure system, and a lubricating and cooling fluid pressure system with an operating fluid pressure deviating from the operating fluid pressure in the working fluid pressure system, a hydraulic switching unit is provided which in at least one operating state connects the second operating fluid pressure source directly to the lubricating and cooling fluid pressure system for increasing the pressure thereof.
Claims14
A drive train device, in particular a motor vehicle drive train device, including a working fluid pressure system (10) for providing an operating fluid pressure with at least a first and a second operating fluid pressure source (11, 12) connected in at least one operating state respectively directly to the working pressure fluid system (10), and with a lubricating and cooling fluid pressure system (13) provided for an operating fluid pressure in the lubricating and cooling fluid pressure system (13) deviating from the operating fluid pressure in the working fluid pressure system (10), and a hydraulic switching unit (14) provided for connecting in at least one operating state the second operating fluid pressure source (12) directly to the lubricating and cooling fluid pressure system (13), the hydraulic switching unit (14) comprising a switching valve (15) for connecting the second operating fluid pressure source (12) depending on an operating fluid pressure in the working fluid pressure system (10) directly to the lubricating and cooling fluid pressure system (13).
A method for operating a drive train device with a working pressure fluid system (10) provided for an operating fluid pressure, with at least a first and a second operating fluid pressure source (11, 12) connected in at least one operating state respectively directly to the working pressure fluid system (10), and with a lubricating and cooling fluid pressure system (13) provided for an operating fluid pressure in the lubricating and cooling fluid pressure system (13) deviating from the operating fluid pressure in the working fluid pressure system (10), with the second operating fluid pressure source (12) being directly connected to the lubricating and cooling fluid pressure system (13) in at least one operating state, said method comprising the step of connecting the second operating fluid pressure source (12) in dependence upon an operating fluid pressure in the working fluid pressure system (10) directly to the lubricating and cooling fluid pressure system (13).
Dependencies are inferred from the claim text.