Hydraulic arrangement for a transmission for a vehicle

Abstract

A hydraulic assembly (10) is provided for a transmission (50) of a vehicle. The hydraulic assembly (10) has a low-pressure interface (21), at least one low-pressure lubrication point (15), a transmission pump (11), a system pressure adjusting device (12), and at least one high-pressure lubrication point (16). The low-pressure interface (21) is designed to receive filtered low-pressure oil at a low pressure. The low-pressure lubrication point (15) is connected to the low-pressure interface (21) via a low-pressure path (31) for receiving low-pressure oil. The transmission pump (11) is designed to pressurize the low-pressure oil to a system pressure higher than the low pressure. The system pressure adjusting device (12) is connected to the transmission pump (11) for receiving the system pressure oil.The system pressure adjusting device (12) is designed to discharge high-pressure oil at a high pressure higher than the low pressure. The high-pressure lubrication point (16) is connected to the system pressure adjusting device (12) via a high-pressure path (32) for receiving high-pressure oil.

Description

Technical field The present invention relates to a hydraulic arrangement for a transmission for a vehicle, to a drive arrangement with a hydraulic arrangement and to a vehicle with a drive arrangement. State of the art Hydraulic arrangements for a vehicle transmission are known. With the increasing complexity of vehicles and the growing number of components and parts used in vehicles, the design of hydraulic arrangements has also become more complex and specific to a vehicle and its transmission. DE 10 2020 213 773 A1 discloses a hydraulic device with a first pump and a second pump. The first pump delivers a hydraulic fluid to consumers. The second pump delivers the hydraulic fluid from its suction side to a high-pressure consumer at a pressure higher than the pressure supplied to the consumers. DE 10 2013 114 810 A1 discloses a hydraulic pressure supply system that provides both high and low hydraulic pressure. Description of the invention It is an object of the present invention to provide an improved hydraulic arrangement that can be operated efficiently. The problem is solved by a hydraulic arrangement having the features of claim 1. Advantageous further developments are the subject of the dependent claims. The first aspect involves a hydraulic system for a vehicle's transmission. The vehicle can be a work machine, such as a wheel loader, tractor, dump truck, or similar. The work machine can have a working device, for example, an auxiliary pressure consumer. This working device can be configured to perform a task, such as lifting or transporting a load, driving a work tool, or similar. The work tool can be an agricultural implement, such as a plow, tedder, mulcher, or similar. The work tool can be hydraulically operated. The hydraulic system comprises a low-pressure interface, at least one low-pressure lubrication point, a gear pump, a system pressure adjustment device, and at least one high-pressure lubrication point. The low-pressure interface is designed to receive filtered low-pressure oil at a low pressure. The low-pressure lubrication point is connected to the low-pressure interface via a low-pressure path, for example, a fluid connection. The gear pump is designed to pressurize the low-pressure oil to a system pressure higher than the low pressure. The system pressure adjustment device is connected to the gear pump, for example, a fluid connection, to receive the system pressure oil. The system pressure adjustment device is designed to discharge high-pressure oil at a high pressure higher than the low pressure.The high-pressure lubrication point is connected to the system pressure adjustment device via a high-pressure path, for example fluidically, to receive high-pressure oil. This allows the use of a gear pump with a lower flow rate, compared to a similar example where both the low-pressure and high-pressure lubrication points are supplied with high-pressure oil. However, if a cooling device is provided for the high-pressure oil, it must be adapted to the changed flow rate supplied by the gear pump at the lower flow rate. For example, the cooling capacity must be increased compared to the similar example. The system pressure is higher than the high pressure. The low pressure can have a value in the range of 1 to 5 bar, for example, 1.5 to 3 bar. The high pressure can have a value in the range of 3 to 12 bar, for example, 5 to 10 bar. The system pressure can have a value in the range of 10 to 35 bar, for example, 12 to 30 bar. The oil for the system pressure oil, the low-pressure oil, the high-pressure oil, and an auxiliary pressure oil (described later) can all be the same oil, but with different pressure levels. The hydraulic system can include these oils, for example, the system pressure oil, the low-pressure oil, the high-pressure oil, and the auxiliary pressure oil. Each oil can be a hydraulic oil. Each oil can have lubricating properties, for example, for lubricating lubrication points such as the low-pressure and high-pressure lubrication points. Each oil can also have cooling properties. If two elements are fluidically connected, a fluid, such as oil, can be conveyed from one element to the other. The fluid connection can be leak-free, so that the fluid is essentially conveyed completely from one element to the other. The fluid connection can be a channel, a pipe, a hose, or the like. The fluid connection can be a direct fluid connection without any additional elements between the fluidically connected elements. Alternatively, the fluid connection can be an indirect fluid connection via additional elements between the fluidically connected elements. The gear pump can be fluidically connected to the low-pressure path. The gear pump can be fluidically connected to the low-pressure interface, for example, via the low-pressure path. The gear pump can be designed, for example, for a driven machine. The gear pump can be designed for a flow rate in the range of 20–150 l / min, for example, 50–90 l / min. The gear pump can be fluidically connected, for example, directly, to the low-pressure interface, for example, to receive low-pressure oil. The low-pressure oil received by the low-pressure interface can be filtered. Before the low-pressure oil is received by the low-pressure interface, it can have passed through a filter device, for example, an oil filter. The filter device can be designed to clean the low-pressure oil, for example, to remove contaminants. The hydraulic assembly can include the transmission. The transmission can have an input element and an output element. The transmission can provide an adjustable, for example, switchable and / or variable, gear ratio between the input element and the output element. The transmission can provide several such gear ratios. The transmission can have at least one switching element, for example, for switching between at least two gear ratios. The switching element can be hydraulically actuated. The transmission can have a hydraulic consumer, for example, one or more switching elements, lubrication points, the high-pressure lubrication point, the low-pressure lubrication point, a hydrostatic drive, a variator, a hydrostatic transmission component, or the like, or a combination thereof. The hydraulic consumer can be designed to drain used oil, for example, after a cooling process, a shifting operation, or a lubrication process. The hydraulic consumer can be fluidically connected, for example, directly, to a reservoir, such as an oil sump. The reservoir can be designed to receive and store oil. The hydraulic consumer can have a drain interface. The drain interface can be fluidically connected, for example, directly, to the reservoir. The hydraulic assembly can have a reservoir drain interface. The reservoir drain interface can be designed to drain oil from the reservoir of the hydraulic assembly, for example, into a reservoir of the vehicle. The hydraulic assembly and the vehicle can share a common reservoir. The low-pressure interface can be designed for connecting a line, for example, a hydraulic line or an oil line. The low-pressure interface can include a sealing device. The low-pressure interface can be designed for a leak-free fluid connection. The low-pressure lubrication point can include a transmission element, such as a bearing unit, a gear, and / or the like. The low-pressure lubrication point can be designed to receive low-pressure oil. The low-pressure lubrication point can also be designed to deliver low-pressure oil to the transmission element for its lubrication and / or cooling. The same applies accordingly to the high-pressure lubrication point. The low-pressure path can be designed to carry low-pressure oil. It may include a channel, hose, pipe, and / or similar component for this purpose. The low-pressure path may incorporate hydraulic elements such as branches, valves, buffers, reservoirs, and the like, or a combination thereof. The oil pressure in the low-pressure path may be essentially constant. However, depending on the length and design of the low-pressure path, for example, in areas with bends, sharp curves, and / or constrictions, a local pressure differential and / or pressure drop may occur along its length. The same applies to the high-pressure path. The system pressure control device can be configured with an inlet interface for receiving the system pressure oil. The system pressure control device can have one or more valves for adjusting the pressure level of the received system pressure oil. For example, the system pressure control device can have a system pressure relief valve configured to limit the pressure of the system pressure oil to the system pressure. The system pressure control device can have multiple channels for distributing different pressure levels and directing these pressure levels to different components of the hydraulic system. For example, the system pressure control device can be configured to output at least one of the system pressure oil at the system pressure, the high-pressure oil at the high pressure, and the auxiliary pressure oil at the adjusted pressure, for example, via appropriate output interfaces. In one embodiment of the hydraulic arrangement, the hydraulic arrangement can include a pressure-reducing valve that can be connected to the high-pressure path for dispensing low-pressure oil, for example, via a fluidic connection. The low-pressure lubrication point can be connected to the pressure-reducing valve via a return path for receiving low-pressure oil, for example, via a fluidic connection. The system pressure control device can include the pressure-reducing valve. The pressure-reducing valve can be integrated into the system pressure control device. The pressure-reducing valve can be designed as a pressure reducer. The pressure-reducing valve can be designed to reduce the pressure of the high-pressure oil to low pressure. This allows excess high-pressure oil to be used or returned to supply the low-pressure lubrication points, for example, at high speeds or at the limit speed of a drive unit.This reduces the need for low-pressure oil taken in via the low-pressure interface. In one embodiment of the hydraulic arrangement, the system pressure adjusting device can include the system pressure relief valve. The system pressure relief valve can be connected to the gear pump, for example, fluidically connected, to limit the pressure of the system hydraulic oil to the system pressure. The system pressure relief valve can also be configured to supply the high-pressure path with high-pressure hydraulic oil. The system pressure relief valve can be integrated into the system pressure adjustment device. The pressure reducing valve and the system pressure relief valve can share a common valve body unit, forming one valve body for the pressure reducing valve and one valve body for the system pressure relief valve. The system pressure relief valve allows the oil pressure to be limited to a specific system pressure. This enables the system pressure relief valve to supply oil at system pressure. The system pressure relief valve can be designed as an overpressure valve. It can be open when the oil pressure in an inlet channel reaches or exceeds the system pressure. In the open state, the system pressure relief valve can discharge oil, for example, as high-pressure oil, through an outlet channel. The system pressure relief valve can supply system pressure oil at the inlet channel and high-pressure oil at the outlet channel. The high-pressure path of the hydraulic system can be fluidically connected to the system pressure relief valve, for example, its outlet channel. The gear pump can also be fluidically connected to the inlet channel of the system pressure relief valve. In one embodiment of the hydraulic arrangement, the hydraulic arrangement can include a system pressure consumer. The system pressure consumer can be connected to the system pressure adjusting device for receiving system pressure oil, for example, via a fluid connection. The inlet channel of the system pressure valve can be fluidically connected to the system pressure consumer, for example, directly. The system pressure consumer can be formed by one or more switching elements or a switching control device for distributing the system pressure oil to one or more switching elements. The system pressure consumer can be formed by a hydrostatic transmission, a variator, a hydrostatic transmission component, and / or the like. In one embodiment of the hydraulic arrangement, the hydraulic arrangement can have a high-pressure outlet interface that can be connected to the high-pressure path for supplying high-pressure oil, for example, via a fluid connection. The hydraulic arrangement can have a high-pressure inlet interface that can be connected to the high-pressure path for supplying high-pressure oil, for example, via a fluid connection. The high-pressure outlet interface can be configured to direct high-pressure oil to a cooler. The high-pressure inlet interface can be configured to receive high-pressure oil from the cooler. The high-pressure outlet interface can be configured for connecting a line, for example, a hydraulic line or an oil line. The high-pressure outlet interface can include a sealing device. The high-pressure outlet interface can be configured for a leak-free fluid connection.The same applies accordingly to the high-pressure inlet interface. In one embodiment of the hydraulic arrangement, the hydraulic arrangement may include a bypass valve. The bypass valve may be configured to bridge the high-pressure outlet interface and the high-pressure inlet interface from the system pressure regulating device to the high-pressure lubrication point. The bypass valve allows at least a portion of the high-pressure oil to be diverted around a component, such as a cooler and / or the high-pressure outlet and inlet interfaces, thus partially bypassing it fluidically. This allows the cooling capacity of the high-pressure oil passing through the cooler to be adjusted as needed. As a result, the high-pressure oil can be quickly brought up to the desired operating temperature and maintained there. The bypass valve can be integrated into the system pressure regulating device. The reducing valve, the system pressure valve, and the bypass valve can share a common valve body unit, forming one valve body for the reducing valve, one for the system pressure valve, and one for the bypass valve. In one embodiment of the hydraulic arrangement, the system pressure control device can be configured to dispense additional pressure oil at a controlled pressure. The hydraulic arrangement can have an additional interface that can be connected to the system pressure control device for dispensing additional pressure oil, for example, via a fluid connection. The system pressure control device can include an additional valve. The additional valve can be configured as a reducing valve or a pressure relief valve. The additional valve can be configured to supply the additional pressure oil to the system. For example, the additional valve can increase or decrease the pressure of at least one of the system pressure oil and the high-pressure oil to the controlled pressure of the additional pressure oil. The controlled pressure of the additional pressure oil can be higher than the low pressure.The additional interface can be designed to output the additional pressure oil, for example to a hydraulic additional pressure consumer such as a steering device, working device or the like. In a second aspect, a drive arrangement with a hydraulic arrangement according to the first aspect is provided. Features, effects, and advantages of the first aspect also represent features, effects, and advantages for the second aspect. Conversely, features, effects, and advantages of the second aspect represent features, effects, and advantages for the first aspect. The drive arrangement further comprises a drive unit, a low-pressure pump, a filter unit, and the gearbox. The drive unit is mechanically connected to an input element of a gearbox for the input of a drive force. The low-pressure pump is designed to pressurize oil at low pressure. The filter unit is designed to filter the low-pressure oil. The low-pressure pump and the filter unit are designed to supply the low-pressure interface of the hydraulic arrangement with filtered low-pressure oil. The drive unit can include a drive motor, for example an electric motor and / or an internal combustion engine. The drive unit can have an output shaft. The drive unit can be designed to output a driving force at the output shaft. The output shaft of the drive unit can be mechanically connected to the input element of the transmission. If two elements are mechanically connected, they are coupled to each other directly or indirectly in such a way that a movement of one element causes a reaction of the other. For example, a mechanical connection can be provided by a positive-locking or friction-locking connection. The mechanical connection can correspond to the meshing of corresponding gear teeth on the two elements. Further elements, such as one or more spur gear stages, can be provided between the elements. A permanently rotationally fixed connection between two elements, on the other hand, is understood to be a connection in which the two elements are rigidly coupled to each other in all intended states of the transmission. The elements can be individual components rigidly connected to each other or even as a single piece.However, a switching element, such as a clutch or brake, can be used to selectively establish or break a rotationally fixed connection between two elements. The low-pressure pump and the filter unit can be fluidically connected, for example, directly. The low-pressure pump or the filter unit can be fluidically connected, for example, directly, to the low-pressure interface. The filter unit can be positioned upstream or downstream of the low-pressure pump in the oil flow direction. The low-pressure pump can be designed to draw oil from the reservoir or the oil sump. The low-pressure pump can also be configured as a boost pressure pump, for example, to provide boost pressure for a working pump. In this case, the working pump can pressurize the low-pressure oil to a working pressure, enabling the operation of the working equipment. In one embodiment of the drive arrangement, the drive arrangement can include a cooling device. The cooling device can be connected to the high-pressure output interface for receiving high-pressure oil, for example, via a fluid connection. The cooling device can be configured to cool the high-pressure oil. The cooling device can be connected to the high-pressure input interface for discharging cooled high-pressure oil, for example, via a fluid connection. The hydraulic arrangement, for example, the cooler bypass valve, can direct at least a portion of the high-pressure oil to the cooling device via the high-pressure output interface. The proportion of high-pressure oil directed to the cooling device can be adjustable via the hydraulic arrangement, for example, the cooler bypass valve. In a third aspect, a vehicle with a drive arrangement according to the second aspect is provided. Features, effects, and advantages of any of the preceding aspects also constitute features, effects, and advantages for the third aspect. Conversely, features, effects, and advantages of the third aspect constitute features, effects, and advantages for the preceding aspects. The vehicle further comprises a traction element that is mechanically connected to an output element of the transmission for the purpose of propelling the vehicle. A traction element may be designed as a track drive or a drive wheel. The vehicle may have multiple traction elements. The output shaft of the drive unit may be mechanically connected to the input element of the transmission. The output element of the transmission may be mechanically connected to one or more traction elements via at least one of the drive shafts and a differential. Brief description of the characters Fig. 1 is a top view of a schematic representation of an embodiment of a hydraulic arrangement for a vehicle transmission. Fig. 2 is a diagram of various operating parameters of an embodiment of a drive arrangement with the hydraulic arrangement as a function of the rotational speed of a drive unit. Fig. 3 is a top view of a schematic representation of an embodiment of a vehicle with the drive arrangement. Detailed description of embodiments Fig. 1 is a top view of a schematic representation of an embodiment of a hydraulic arrangement 10 for a transmission 50 for a vehicle, which is shown in Fig. 3. The hydraulic arrangement 10 has a system pressure adjusting device 12, a low-pressure interface 21, a high-pressure outlet interface 22, a high-pressure inlet interface 23, an auxiliary interface 24, a discharge interface 25, a low-pressure lubrication point 15, a high-pressure lubrication point 16, a transmission pump 11 and system pressure consumers 17, 18. Figure 1 also shows a low-pressure pump 41, a filter assembly 42, and a cooler assembly 43 of the vehicle. The low-pressure pump 41 is fluidically connected to the filter assembly 42 and draws oil from a reservoir, in this case an oil sump. The low-pressure pump 41 is fluidically connected to the reservoir via the filter assembly 42. The low-pressure pump 41 pressurizes the oil at low pressure, thereby supplying low-pressure oil. The low-pressure pump 41 is fluidically connected to the low-pressure interface 21 for supplying the hydraulic assembly 10 with filtered low-pressure oil. The low-pressure interface 21 is designed to receive the filtered low-pressure oil. The low-pressure lubrication point 15 is connected to the low-pressure interface 21 via a low-pressure path 31 to receive the low-pressure oil. The low-pressure lubrication point 15 supplies a bearing unit of the gearbox 50 with low-pressure oil as lubricating oil. This allows the gearbox pump 11 to be used with a low delivery rate. The used low-pressure oil is collected in a reservoir of the hydraulic assembly 10. The gear pump 11 is also fluidically connected to the low-pressure path 31. Thus, the gear pump 11 is connected to the low-pressure interface 21 via the low-pressure path 31. The gear pump 11 is supplied with low-pressure oil via the low-pressure path 31. The gear pump 11 is designed to pressurize the low-pressure oil with a system pressure, which is higher than the low pressure. Therefore, the gear pump 11 supplies and discharges the system pressure oil at this pressure. The system pressure control device 12 is fluidically connected to the gear pump 11 for receiving the system pressure oil, in this case via an input interface. The system pressure control device 12 includes a system pressure relief valve. The system pressure relief valve is configured to limit the pressure at an input channel of the system pressure relief valve to the system pressure and to supply the high-pressure oil at an output channel of the system pressure relief valve. The system pressure control device 12 is configured to output the high-pressure oil to a high-pressure path 32, in this case via an output interface. The high pressure is higher than the low pressure and lower than the system pressure. The high-pressure path 32 is connected to the high-pressure outlet interface 22 for the discharge of at least a portion of the high-pressure oil. The high-pressure outlet interface 22 is fluidically connected to the vehicle's cooling unit 43. The cooling unit 43 is designed to cool the high-pressure oil. The cooling unit 43 is fluidically connected to the high-pressure inlet interface 23 for the discharge of cooled high-pressure oil. The cooled high-pressure oil is returned to the high-pressure path 32 via the high-pressure inlet interface 23. The system pressure adjusting device 12 has a bypass valve designed to bridge the high-pressure outlet interface 22 and the high-pressure inlet interface 23 from the system pressure adjusting device 12 to the high-pressure lubrication point 16. The portion of the high-pressure oil that is diverted so that it does not flow through the cooler device 43 can be adjusted via the bypass valve. The high-pressure lubrication point 16 is connected to the system pressure adjusting device 12 via a high-pressure path 32 for receiving high-pressure oil. The high-pressure lubrication point 16 supplies a gear element of the gearbox 50 with high-pressure oil as lubricating oil. The used high-pressure oil is collected in a reservoir of the hydraulic assembly 10. The system pressure adjusting device 12 includes a reducing valve 13. The high-pressure path 32 is fluidically connected to a return path 33 via the reducing valve 13. The low-pressure lubrication point 15 is also supplied with low-pressure oil via the return path 33. Thus, excess high-pressure oil is used as low-pressure oil to lubricate the low-pressure lubrication point 15 via the return path 33. This reduces the need for low-pressure oil, which is drawn in via the low-pressure interface 21. The system pressure control device 12 also has interfaces for supplying the system pressure oil to the hydraulic consumers 17, 18. In this case, a first hydraulic consumer 17 is designed as a switching control device for distributing the system pressure oil to several switching elements of the transmission 50. In this case, a second hydraulic consumer 18 is designed as a hydrostatic transmission component. System pressure oil consumed by the hydraulic consumers 17, 18 is supplied to the reservoir of the hydraulic assembly 10. The system pressure adjusting device 12 further comprises an auxiliary valve for supplying auxiliary pressure oil at an adjusted pressure and an output interface for dispensing the auxiliary pressure oil. In this case, the pressure of the system pressure oil is reduced to the adjusted pressure via the auxiliary valve. The adjusted pressure is higher than the low pressure and lower than the high pressure and the system pressure. The system pressure adjusting device 12 is connected to the auxiliary interface 24 for dispensing the auxiliary pressure oil. The hydraulic arrangement 10 also has the discharge interface 25, which is designed to discharge oil from the reservoir of the hydraulic arrangement 10 to the reservoir of the vehicle. Fig. 2 is a diagram of various operating parameters of an embodiment of a drive arrangement with the hydraulic arrangement 10 as a function of the rotational speed of a drive unit 60 shown in Fig. 3. A first curve 91 represents the oil flow rate requirement of the gearbox 50. A second curve 92 represents the delivery rate of system pressure oil of the gearbox pump 11. A third curve 93 represents the high-pressure oil requirement of the gearbox 50. A fourth curve 94 represents the flow rate of high-pressure oil that is returned to the low-pressure lubrication point 15 via the reducing valve 13 and the return path 33. As the rotational speed of the drive unit 60 increases, the oil flow rate requirement of the gearbox 50, the delivery rate of the gearbox pump 11, and the high-pressure oil requirement of the gearbox 50 all increase. When the rotational speed of the drive unit 60 reaches or exceeds a limiting speed, the oil flow rate requirement of the gearbox 50 no longer increases.Above the limiting speed, excess high-pressure oil can be returned as low-pressure oil to the low-pressure lubrication point 15. Fig. 3 is a top view of a schematic representation of an embodiment of a vehicle with a drive unit 60 and a hydraulic assembly 10 with the system pressure adjusting device 12. The vehicle is designed as a working machine. The vehicle has a cooling device 43 for cooling the high-pressure oil and is fluidically connected to the hydraulic assembly 10 via the high-pressure inlet interface 23 and the high-pressure outlet interface 22. The vehicle has a low-pressure pump 41 and a filter device 42 for supplying filtered low-pressure oil. The low-pressure pump 41 is fluidically connected to the low-pressure interface 21 of the hydraulic assembly 10. The discharge interface 25 is not shown. The vehicle has an additional hydraulic pressure consumer 83, which is fluidically connected to the hydraulic assembly 10 via the additional interface 24. The vehicle has a drive unit 60, in this case an internal combustion engine, with a drive shaft. The transmission 50 has an input element 51 and an output element 52. The transmission 50 has a gear ratio between the input element 51 and the output element 52, which is adjustable via the system pressure adjusting device 12. The drive shaft is mechanically connected to the input element 51 to transmit a drive force to the transmission 50. The vehicle has two traction elements 70, which are mechanically connected to the output element 52 via a differential gear to propel the vehicle. Reference sign 10 Hydraulic assembly 11 Gear pump 12 System pressure adjusting device 13 Reducing valve 15 Low-pressure lubrication point 16 High-pressure lubrication point 17 First system pressure consumer 18 Second system pressure consumer 21 Low-pressure interface 22 High-pressure outlet interface 23 High-pressure inlet interface 24 Auxiliary interface 25 Discharge interface 31 Low-pressure path 32 High-pressure path 33 Return path 41 Low-pressure pump 42 Filter unit 43 Cooler unit 50 Gearbox 51 Inlet element 52 Outlet element 60 Drive unit 70 Traction element 83 Auxiliary pressure consumer 91 Gearbox oil flow rate requirement 92 Amount of high-pressure oil generated by the gearbox pump 93 Gearbox high-pressure oil requirement 94 Amount of high-pressure oil returned

Claims

Hydraulic arrangement (10) for a transmission (50) for a vehicle, wherein the hydraulic arrangement (10) comprises: a low-pressure interface (21) configured to receive filtered low-pressure oil at a low pressure; at least one low-pressure lubrication point (15), wherein the low-pressure lubrication point (15) is connected to the low-pressure interface (21) via a low-pressure path (31) for receiving low-pressure oil; a transmission pump (11) configured to supply the low-pressure oil with a system pressure higher than the low pressure; a system pressure adjusting device (12) connected to the transmission pump (11) for receiving the system pressure oil, wherein the system pressure adjusting device (12) is configured to supply high-pressure oil with a high pressure higher than the low pressure; and at least one high-pressure lubrication point (16).wherein the high-pressure lubrication point (16) for receiving high-pressure oil is connected to the system pressure adjusting device (12) via a high-pressure path (32). Hydraulic arrangement (10) according to claim 1, characterized in that the hydraulic arrangement (10) has a reducing valve (13) which is connected to the high pressure path (32) for dispensing low pressure oil, and the low pressure lubrication point (15) is connected to the reducing valve (13) via a return path (33) for receiving low pressure oil. Hydraulic arrangement (10) according to one of the preceding claims, characterized in that the system pressure adjusting device (12) has a system pressure valve which is connected to the gear pump (11) to limit the pressure of the system pressure oil to the system pressure and is configured to supply the high pressure path (32) with high pressure oil. Hydraulic arrangement (10) according to one of the preceding claims, characterized in that the hydraulic arrangement (10) has a system pressure consumer (17, 18), wherein the system pressure consumer (17, 18) is connected to the system pressure adjusting device (12) for receiving system pressure oil. Hydraulic arrangement (10) according to one of the preceding claims, characterized in that the hydraulic arrangement (10) has a high-pressure output interface (22) which is connected to the high-pressure path (32) for the purpose of supplying high-pressure oil, and a high-pressure input interface (23) which is connected to the high-pressure path (32) for the purpose of supplying high-pressure oil. Hydraulic arrangement (10) according to claim 5, characterized in that the hydraulic arrangement (10) has a bypass valve which is configured to bridge the high pressure outlet interface (22) and the high pressure inlet interface (23) from the system pressure setting device (12) to the high pressure lubrication point (16). Hydraulic arrangement (10) according to one of the preceding claims, characterized in that the system pressure adjusting device (12) is designed to dispense additional pressure oil at an adapted pressure, and the hydraulic arrangement (10) has an additional interface (24) which is connected to the system pressure adjusting device (12) for dispensing additional pressure oil. Drive arrangement comprising a hydraulic arrangement (10) according to one of the preceding claims, a drive unit (60) which is mechanically connected to an input element (51) of a transmission (50) for the purpose of applying a drive force, a low-pressure pump (41) which is designed to supply oil with low pressure as low-pressure oil, and a filter device (42) which is configured to filter the low-pressure oil, wherein the low-pressure pump (41) and the filter device (42) are configured to supply the low-pressure interface (21) of the hydraulic arrangement (10) with filtered low-pressure oil. Drive arrangement according to claim 8, characterized in that the drive arrangement has a cooling device (43) which is connected to the high-pressure output interface (22) for receiving high-pressure oil, is configured to cool the high-pressure oil and is connected to the high-pressure input interface (23) for discharging cooled high-pressure oil. Vehicle with a drive arrangement according to one of claims 8 or 9 and a traction element (70) which is mechanically connected to an output element (52) of the transmission (50) for moving the vehicle.

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