DE102015208653A1 - fluid arrangement - Google Patents

Abstract

The invention relates to a fluid arrangement for fluidically actuating a first consumer and a second consumer of a motor vehicle in a hydraulic circuit, comprising a pump (22) for conveying a working fluid in the hydraulic circuit for actuating the first consumer and the second consumer, at least one reservoir (36). for storing working fluid, a valve logic (30) for interconnecting the hydraulic circuit with the second consumer, wherein the first consumer by the pump (22) in a first switching state is convertible and a portion of the first consumer and / or a portion of an action chain between the Pump (22) and the first consumer in the first switching state is used as an accumulator, wherein the pump (22) and the pressure accumulator are at least zusammenschaltbar for actuating the second consumer. By means of a fluid arrangement designed in this way, a construction of the fluid arrangement can be simplified.

Description

The invention relates to a fluid arrangement and a method for the fluidic actuation of at least one consumer of a motor vehicle.

Out DE 10 2008 009 653 A1 a fluid arrangement for controlling a dual-clutch transmission of a motor vehicle is known. The fluid assembly comprises a hydraulic power source for supplying the fluid assembly with hydraulic energy via a hydraulic medium, a pressure accumulator for storing the hydraulic energy, a clutch cooling for cooling clutches of the dual clutch transmission by means of the hydraulic medium, clutch actuators for actuating a first clutch and a second clutch, wherein the hydraulic energy source comprises a double-flow electric pump.

There is therefore a constant need to simplify the structure in a fluid arrangement with at least one consumer and a fluidic energy source.

It is an object of the invention to provide a fluid assembly with measures that simplify the construction of a fluid assembly.

The object is achieved according to the invention by a fluid arrangement having the features of claim 1. Preferred embodiments of the invention are specified in the subclaims, which individually or in combination may represent an aspect of the invention.

The invention relates to a fluid arrangement for fluidly actuating a first consumer and a second consumer of a motor vehicle in a hydraulic circuit comprising a pump for delivering a working fluid in the hydraulic circuit for actuating the first consumer and the second consumer, at least one reservoir for providing and storing working fluid, a valve logic for interconnecting the hydraulic circuit with the second consumer, wherein the first consumer can be converted by the pump into a first switching state and a portion of the first consumer and / or a portion of an action chain between the pump and the first consumer in the first switching state as pressure accumulator is usable, wherein the pump and the accumulator are at least zusammenschaltbar for actuation of the second consumer.

By means of such a fluid arrangement in which, in a first switching state, a section of the first consumer and / or a section of an action chain between the pump and the first consumer can be used as an accumulator, the structure of a fluid arrangement can be simplified. In particular, in a fluid arrangement in which the first consumer comprises a pressure accumulator, an actuation actuator can be saved. Instead of providing a separate actuation actuator for each consumer, for example a separate pump, the first consumer and / or the second consumer can be actuated via the pump. Furthermore, a smaller pump may be used, so that the power consumption of the fluid assembly can be reduced. In this way, the pressure required and the force required to actuate the second consumer can be reduced, so that a second actuation actuator, for example a second pump or an additional electric motor, can be saved. For example, the second consumer can be actuated by such an arrangement only at a certain switching state of the first consumer, preferably, the second consumer can only be operated when the first consumer has an open position. In this way, errors in the operation of the motor vehicle can be prevented. The first consumer can only be operated with the pump and the second consumer can be operated with the pump and / or the accumulator of the first consumer. The valve logic can allow an interconnection which connects the second consumer either to the pump and / or the accumulator of the first consumer. In this way, the energy balance in the fluid assembly can be improved because a useful part of the pressure accumulator of the first consumer can be used directly to actuate a second consumer. In particular, the first consumer can only make the pressure accumulator available when the first consumer has been transferred by the pump into a first switching state. If the first consumer is in a different from the first switching state second switching state, the first consumer can not provide pressure accumulator available. Furthermore, it can be achieved with the aid of the valve logic that when the first load is transferred to the first switching state by the pump, the second load can not be actuated by the pump. In particular, the pressure accumulator can be made available without additional components. Instead, the accumulator may consist of existing components of the first consumer, and be formed by an appropriate use and / or sequence of the components. For example, the pressure accumulator of the first consumer in this case of an actuator, such as a cylinder, and an actuator, in particular a spring element, such as a plate spring or diaphragm spring may be formed, which can be used to transfer the first consumer in a first switching state or second switching state. For example, the first consumer can be held by the actuating device in the second switching state, for example a closed state. As soon as pumped by the pump working fluid into the actuator of the first consumer, the actuator can, for example, compress the actuator and thereby convert the first consumer in a first switching state, for example, an open state. However, the actuator may endeavor to return the first load to the second switching state so that the actuator can provide a counterforce to the actuating force of the actuator. Thereby, a pressure pulse through the actuator to act on the working fluid in the actuator, so that the working fluid is pressed against the pumping direction of the pump from the actuator. To compensate for the loss of working fluid in the actuator, the pump may again pump working fluid into the actuator. The valve logic, as soon as the first consumer has been transferred by the pump in the first switching state, connect the second consumer to the hydraulic circuit, so that the second consumer can be actuated by the pump and / or the pressure accumulator. During the transfer of the first consumer into the first switching state and during the actuation of the second consumer, the pump can pump working fluid all the time, so that the pump, once the first consumer has been transferred in the first switching state, becomes working fluid again after a pressure pulse through the pressure reservoir can pump into the actuator. Once the first consumer is in the first switching state, the pump can pump working fluid to actuate the second consumer to the second consumer. In this case, the actuating force of the pumped by the pump working fluid for actuating the second consumer can be enhanced with the help of the pressure pulses from the pressure accumulator of the first consumer. For example, the first consumer may include a clutch, and the second consumer may be a gear actuator, such that the gear actuator may actuate a transmission only when the clutch is open. By means of a fluid arrangement designed in this way, a construction of the fluid arrangement can be simplified, and an actuation of at least one consumer with a fluidic energy source can be simplified.

The term chain of action here describes a sequence of uses of components of the first consumer, which act between the pump and the first consumer to achieve an effect, such as to provide an accumulator. For example, a state of a component of the first consumer in the first switching state of the first consumer may be the cause for providing a pressure accumulator of the first consumer.

In this case, the pump may be part of a so-called power pack. The term power pack is an actuating actuator in which the pump is driven by an electric motor, wherein the pump pumps out the working fluid from the reservoir into the hydraulic circuit or pumps it into the reservoir from the hydraulic circuit, depending on the direction of rotation of the electric motor to operate the first consumer and / or second consumer.

The valve assembly may be formed from a plurality of identical or different valves to connect the second consumer to the hydraulic circuit. The valves may have at least two switching positions, a first switching position for connecting the second consumer to the hydraulic circuit and a second switching position, in particular an open position or neutral position, for separating the second consumer from the hydraulic circuit. Preferably, the valve assembly has a third switching position to allow two different directions of actuation of the second consumer.

A fluid arrangement is preferably a hydraulic arrangement which is operated with a working fluid, in particular a hydraulic medium, such as hydraulic oil. The pump is preferably a hydraulic pump, in particular a displacement-type hydraulic pump, for example a vane-cell pump, a gear pump or a piston pump. For example, an electric motor is used to drive the pump. The pump used to actuate the at least one consumer is also referred to as a pump actuator. The second consumer may be, for example, a transmission component, such as a gear actuator, which may serve to guide a selection and / or switching movement. Furthermore, the first load may be a clutch, for example a single clutch or a double clutch. The coupling can be actuated directly or indirectly. The coupling can also be designed to run wet or dry.

In a preferred embodiment, the first consumer comprises a clutch and a cylinder, in particular a Zentralausrücker, wherein the cylinder with an actuating device of the clutch, in particular a plate spring, in a first switching state of the clutch is used as an accumulator. In the cylinder, a piston can be moved. Depending on how the piston is moved in the cylinder, the volume of a pressure chamber changes within the Cylinder. For example, the piston in the cylinder at a closed position of the clutch reduce the pressure space within the cylinder such that no working fluid, in particular a hydraulic fluid, can be stored in the cylinder. When the coupling is transferred by means of the pump into a first switching position, for example the open position, the piston in the cylinder is also displaced, so that the piston in the cylinder releases a volume in which the working fluid can be stored. At the same time, the piston can actuate an actuating device of the clutch, for example a spring element, in order in this way to transfer the clutch into a first switching state. The actuating device may be designed such that it can have a counterforce to the actuating force of the piston in the first switching state, for example, the actuator in the open state of the clutch press on the piston to transfer the piston in the second switching state, whereby working fluid through the resulting Pressure pulse can be pressed out of the cylinder. The pressure pulse can be used to actuate the second consumer. In this way, the cylinder can serve as an accumulator. Furthermore, when the clutch is transferred to a second switching position, for example the closed position, the hydraulic fluid can be forced out of the cylinder with the aid of the actuating device. The resulting pressure can be used to actuate the second consumer or be pumped by the pump by changing the direction of rotation in a reservoir. By integrating the pressure accumulator in the first consumer, the structure of a fluid assembly can be simplified. In particular, components for the fluid arrangement can thereby be saved. In addition, this can reduce the energy required to operate the second consumer. The energy balance in the fluid assembly can be improved by the use of the pump and / or the accumulator of the first consumer, since a useful part of the pressure accumulator can be used directly to actuate the second consumer. The first consumer can use different types of cylinders. For example, the cylinder may be an outboard cylinder, for example a semi-hydraulic actuator assembly, or a central release. In a semi-hydraulic actuating arrangement, a piston, for example a cylinder seated on the outside of the transmission with a slave piston, with a mechanical transmission to the clutch, for example an actuating lever, can be used. In a cylinder designed as Zentralausrücker an actuation of the clutch can be done without a lever mechanism, such as a mechanical transmission to the clutch, but directly on the working fluid. The actuator may be a release bearing, a spring element of a friction clutch, for example a plate spring or a diaphragm spring, or the pressure plate of the clutch.

It is preferred that the first consumer in the first switching state comprises an additional vent path for use with the cylinder as pressure accumulator. The air gap can be a negative air gap or a positive air gap. In the context of the present invention, the actuating travel which is covered by the actuating device in the case of a normally closed clutch until the beginning of a torque reduction in this disengaging operation is referred to as a "negative" release path of the clutch. The clutch can be a simple clutch or a double clutch. This can be understood as an operating device, for example, a release bearing, a plate spring a friction clutch or the pressure plate itself. Alternatively, one or both clutches may be open in the ground state. In this case, the pressure plates are biased by the associated disc springs in the open state and via engagement bearing the disc springs are loaded against this preload to the engaged state. In this case, that actuation path, which must be covered by the actuator until the beginning of a torque build-up in this engagement process, referred to as "positive" Lüftweg the clutch. This can be understood as an operating device, for example, a release bearing, a plate spring a friction clutch or the pressure plate itself. The de fi nition of a release path thus applies mutatis mutandis to both engagement and release bearings. In the following, for the sake of simplicity, only the term "air path" will be referred to in general and the invention will be discussed in relation to grounded clutches, this being done within the scope of an exemplary and non-limiting illustration of the invention. In particular, the first consumer may include an additional vent path and the additional vent path may be used as a pressure accumulator. In this case, the actuating device can be actuated over a longer actuation path, as would be necessary for the transfer of the clutch in a first switching state. The actuator can then compensate for the additional air gap by a back pressure to produce a pressure pulse. The design of the clutch characteristic can take into account the requirements of use as pressure accumulator. By integrating the additional Lüftwegs as pressure accumulator in the first consumer, the structure of a fluid assembly can be simplified.

Preferably, the pump is connected to the first consumer and comprises a first conveying direction for transferring the first consumer into a first switching state and a second conveying direction opposite to the first conveying direction for transferring the first consumer into a second switching state. In particular, the pump can use a controllable pump drive, which can be driven in both directions with a predetermined speed. In this way, the first load can be controlled directly with the pump without a valve arrangement, whereby a structure of a fluid arrangement can be simplified.

In a preferred embodiment, the second consumer is a transmission actuator, in particular a hydrostatic transmission actuator.

Preferably, the gear actuator comprises a hydraulic swivel actuator and / or a hydraulic shear actuator for actuating the second consumer. In this way, the second consumer can perform a lifting and / or a pivoting movement to actuate a transmission. The Schwenkaktor and the Schubaktor can be operated independently and act. Which of the movements is associated with shifting and which with the selection, can result from the boundary conditions on the vehicle transmission. Furthermore, the piston surfaces in the second consumer can be adjusted accordingly.

In a preferred embodiment, a safety system is provided to transfer the transmission in a neutral position in case of failure of the pump. The safety system can also be a signal generator and comprise, for example, at least one sensor, at least one valve logic and / or at least one actuation actuator. In case of failure of the pump, the safety system can use the stored in the cylinder of the first consumer working fluid to transfer the transmission with the help of the second consumer in a neutral position. In this case, the working fluid can be pressed out of the cylinder by means of the piston and the actuating device of the clutch, whereby the working fluid volume in the hydraulic circuit can increase, thereby providing an increased pressure in the hydraulic circuit for actuating the second consumer. When transferring the first consumer into the first switching state, while holding the first consumer in the first switching state or when transferring the first consumer into the second switching state, the security system can detect a failure of the pump in order to supply the second consumer with the aid of the working fluid from the cylinder Press, so that the transmission can be transferred to a neutral position. In this way, the safety of the motor vehicle can be increased by the fluid arrangement, since in case of failure of the pump no torque can be transmitted from the motor vehicle engine to a transmission.

It is preferred that the second consumer via a valve, in particular via an additional shut-off valve, is separable from the pump and the first consumer. The check valve can prevent a transfer of working fluid from the pump to the second consumer. In this way, unintentional actuation of the second consumer when operating the first consumer can be avoided.

• – Überführen des ersten Verbrauchers in einen ersten Schaltzustand durch die Pumpe,
• – Speichern von Arbeitsfluid in einem als Druckspeicher ausgebildeten Abschnitt des ersten Verbrauchers,
• – Zuschalten des zweiten Verbrauchers zum Hydraulikreis durch die Ventillogik,
• – Betätigen des zweiten Verbrauchers durch die Pumpe und/oder dem Druckspeicher des ersten Verbrauchers.

The invention further relates to a method for fluidically actuating a first consumer and / or second consumer of a motor vehicle, having a fluidic energy source, in particular having a fluid arrangement, which can be designed and developed as described above, comprising the following steps:

• Transfer of the first consumer into a first switching state by the pump,
• Storing working fluid in a section of the first consumer designed as an accumulator,
• Connecting the second consumer to the hydraulic circuit through the valve logic,
• - Actuation of the second consumer by the pump and / or the accumulator of the first consumer.

By means of a method having a fluid arrangement which can be designed and developed as described above, the actuation of at least one consumer with a fluidic energy source can be simplified.

In a preferred embodiment, in case of failure of the pump when transferring the first consumer in a first switching state or holding the first consumer in the first switching state stored in the pressure accumulator of the first consumer working fluid for transferring the transmission in a neutral position by means of the second consumer used. In this way, the fluid assembly can increase safety, since in case of failure of the pump can be used by the stored in the pressure accumulator of the first consumer working fluid for transferring the transmission to a neutral position, so that no torque can be transmitted to the transmission.

The invention will be explained by way of example with reference to the accompanying drawings based on preferred embodiments, wherein the features shown below both individually and in combination may constitute an aspect of the invention. Show it:

1 : a diagram of a coupling, which is additionally usable as an accumulator,

2 FIG. 2 is a schematic diagram of a first embodiment of a fluid arrangement, and FIG

3 : A schematic diagram of a second embodiment of a fluid assembly.

In 1 1 is a diagram of an impressed coupling of a fluid assembly including a clutch and a transmission. The clutch is connected to a Zentralausrücker, in English as Concentric Slave Cylinder, abbreviated CSC, connected in the form of a piston. With the help of the Zentralausrückers the clutch, for example, be opened. The gearbox is actuated by a geared actuator, which is operated only when the clutch is open. The cylinder and an actuator, such as a diaphragm spring, the clutch can serve as an accumulator in the time of the open clutch. This is done by pumping a working fluid into the cylinder by means of a pump actuator to open the clutch. Once the clutch is open, the diaphragm spring of the clutch is compressed and endeavors to return to the initial state. In this case, the diaphragm spring acts against the working fluid in the cylinder, whereby a pressure pulse is generated and working fluid is pressed out of the cylinder against the actuating force of the pump. The pump continues to pump working fluid into the cylinder, compensating for the volume of working fluid that has been squeezed out. By squeezing the working fluid out of the cylinder creates a pressure which can be used to actuate the gear actuator.

On the x-axis of the 1 the path x of the clutch or the volume V of the working fluid in the cylinder are shown. The force F, the pressure p and the moment M _R are shown on the y-axis. In this case, the force-displacement diagram and the pressure-volume diagram are shown as a common continuous line, and the torque-distance diagram is shown as a dashed line. Furthermore, the diagram has two areas, a clutch actuation area a and an accumulator area b. It can be seen that in the clutch actuation region a, the force F for actuating the clutch via the path x and the pressure p and the volume V of the working fluid in the cylinder increases to open the clutch while the torque transmitted through the clutch M _R the way x decreases. In the pressure storage area b, the clutch is opened, so that no moment is transmitted, at the same time the force F via the path x or the pressure p due to the volume V in the cylinder is almost constant. The slight deviation in the pressure storage area b is due to the fact that an actuating device, for example a plate spring, the clutch is transferred into an additional Lüftweg, so that working fluid can be incorporated in the provided by the additional Lüftweg volume. The additional Lüftweg is compensated by the diaphragm spring by the diaphragm spring pushes back the piston of the cylinder until the additional Lüftweg has been compensated. As a result, the pressure p and the volume V of the working fluid are lowered. After a pressure pulse to compensate for the additional Lüftwegs the pressure p and the volume V of the working fluid in the cylinder is returned to the level of the clutch actuation, again an additional Lüftweg can be covered, so that the additional Lüftweg is compensated again. Although in 1 a schematic diagram without exact values is shown, for the path x, the volume V, the force F, the pressure p and the moment M _R the units of measure of the International System of Units (SI units).

2 shows a fluid assembly 10 with a second consumer in the form of a gear actuator 12 , a first consumer 14 comprising a cylinder and a clutch 14 , and a pump 22 , where the pump 22 via an electric motor 34 is driven and with a reservoir 36 connected is. In the reservoir 36 the working fluid for the fluid assembly is stored, the working fluid depending on the application from the reservoir 36 pumped out or be pumped into it. The working fluid is a hydraulic oil in this embodiment. The coupling 14 includes a pressure plate 16 and a plate spring 18 , The cylinder is in this embodiment, a Zentralausrücker. The gear actuator 12 includes a hydraulic shear actuator 24 , a hydraulic swivel actuator 26 and a shift shaft 28 for mechanical coupling to the transmission, not shown. In this embodiment, by means of the hydraulic Schubaktors 24 the shift shaft 28 be raised or lowered, and with the help of the Schwenkaktors 26 can the shift shaft 28 be panned. Here, the shear actuator 24 and the swivel actuator 26 act independently of each other. Furthermore, the fluid arrangement comprises 10 a valve logic 30 , The valve logic 30 includes in this embodiment two proportional valves 32a . 32b for controlling the gearbox. Each of the two proportional valves 32a . 32b includes three switch positions. A first switching position, for example for lifting and / or pivoting of the switching shaft 28 in a first pivoting direction, an open position or neutral position with no pressure from the pump 22 and / or the piston used as pressure accumulator 20 to the gear actuator 12 can be forwarded, and a third shift position, for example, to lower and / or to pivot the shift shaft 28 in a second pivoting direction. In 2 are the two proportional valves 32a . 32b shown in the second switching position. Furthermore connect the two proportional valves 32a . 32b , the hydraulic circuit, as well as the hydraulic selector actuator 24 and the hydraulic shear actuator 26 each with a reservoir 36 to store the working fluid after actuation of the second consumer. The with the proportional valves 32a . 32b connected reservoirs 36 can do the same reservoir 36 like the reservoir 36 the pump 22 be and / or each have their own reservoir 36 be, which are interconnected by lines not shown. The coupling 14 is in this embodiment, a closed state in the basic state 14 , At a transfer of the clutch 14 in a first switching state, wherein the first switching state an opened clutch 14 is, the pump will 22 over the electric motor 34 driven in a first direction of rotation. This is working fluid from the reservoir 36 pumped into the cylinder, creating a piston 20 in the cylinder in the direction of the clutch 14 is moved. This is the plate spring 18 compressed. During the transfer of the clutch 14 in a first switching state by the pump 22 are the proportional valves 32a . 32b the valve logic 30 in the middle open position, leaving the gear actuator 12 not by the pump 22 can be operated. Once the clutch 14 has been transferred to the first switching state, the valve logic switches 30 the switching valves 32a . 32b in a first or second switching state to the gear actuator 12 to operate accordingly. The pump pumps 22 Working fluid from the reservoir 36 to the gear actuator 12 , At the same time, the accumulator of the first consumer comprising the cylinder and the plate spring 18 a pressure pulse to the gear actuator 12 transfer. This happens because the piston 20 through the working fluid travels an additional Lüftweg, so that the diaphragm spring 18 the piston 20 pushes back to compensate for the additional Lüftweg. This creates a pressure pulse, the working fluid from the piston against the pumping direction of the pump 22 suppressed. This pressure pulse is used to actuate the gear actuator 12 used. Once the gear actuator 12 has been actuated, the valve logic switches 30 the proportional valves 32a . 32b back to the middle neutral position. Furthermore, the electric motor changes 34 its direction of rotation so that the pump pumps the working fluid out of the cylinder into the reservoir. This will cause the piston 20 through the plate spring 18 due to the decreasing pressure in the cylinder moves, so that a pressure space for storing working fluid in the cylinder is reduced. Once the clutch 14 reaches the second switching position, the electric motor 34 off.

If at an opened first consumer the pump 22 fails, the first consumer is through the diaphragm spring 18 converted into a closed state. In this way, the working fluid from the cylinder through the piston 20 emptied. The working fluid may be used to drive the unillustrated gear via the proportional valves 32a . 32b with the help of the gear actuator 12 in a neutral position to convict. This can be done with the help of a security system, not shown, or a signal generator, not shown, which the proportional valve 32a . 32b communicates with the working fluid from the piston 20 the transmission, not shown by means of the gear actuator 12 to transfer to the neutral position.

3 shows a further embodiment of a fluid assembly 38 , In the 3 used components for the same components as in 2 the same reference numerals. The fluid arrangement 38 of the 3 differs only from the fluid arrangement 10 of the 2 through an additional valve 40 , The valve 40 is formed in this embodiment as a check valve in the form of a two-way valve. The valve 40 includes two switching positions, which are explained below from top to bottom: a first switching position is the connecting position and the second switching position is the open position, ie a neutral position. In the connect position, the second consumer becomes the hydraulic circuit of the first consumer and the pump 22 connected. In the open position, the second consumer of the hydraulic circuit of the pump 22 and the first consumer separately. Through the valve 40 can be ensured that in a transfer of the first consumer in a first switching state, the second consumer is not actuated. In this embodiment, the valve 40 shown in the open position, so the valve logic 30 and the gear actuator 12 from the hydraulic circuit of the pump 22 and the first consumer are disconnected.

If at an opened first consumer the pump 22 fails, the first consumer is through the diaphragm spring 18 transferred to a closed position. In this way, the working fluid from the cylinder through the piston 20 emptied. The working fluid may be used to transfer the unillustrated transmission via the valve 40 and the proportional valves 32a . 32b with the help of the gear actuator 12 in a neutral position to convict. This can be done with the help of a security system, not shown, or a signal generator, not shown, which the proportional valve 32a . 32b and / or the valve 40 communicates with the working fluid from the piston 20 with the help of the gear actuator 12 to transfer the transmission, not shown, in the neutral position.

LIST OF REFERENCE NUMBERS

10

 fluid arrangement

12

 gear actuator

14

 clutch

16

 pressure plate

18

 Belleville spring

20

 piston

22

 pump

24

 hydraulic swivel actuator

26

 hydraulic shear actuator

28

 shift shaft

30

 valve logic

32a, 32b

 proportional valve

34

 electric motor

36

 reservoir

38

 fluid arrangement

40

 Valve

a

 Clutch operating portion

b

 Pressure storage area

F

 Force to operate the clutch

p

 Pressure in the cylinder

MR

 transmitted moment

x

 Way to actuate the clutch

V

 Volume of working fluid in the cylinder

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102008009653 A1 [0002]

Claims (10)

Fluid arrangement for fluidically actuating a first consumer and a second consumer of a motor vehicle in a hydraulic circuit, comprising - a pump ( 22 ) for conveying a working fluid in the hydraulic circuit for actuating the first consumer and the second consumer, - at least one reservoir ( 36 ) for providing and storing working fluid, - a valve logic ( 30 ) for interconnecting the hydraulic circuit with the second consumer, wherein the first consumer by the pump ( 22 ) is convertible into a first switching state and a portion of the first consumer and / or a portion of an action chain between the pump ( 22 ) and the first consumer in the first switching state is usable as an accumulator, wherein the pump ( 22 ) and the pressure accumulator are at least zusammenschaltbar for actuating the second consumer. Fluid arrangement according to claim 1, characterized in that the first consumer a coupling ( 14 ) and a cylinder, in particular a Zentralausrücker, wherein the cylinder with an actuating device of the clutch ( 14 ), in particular a disc spring ( 18 ), in a first switching state of the coupling ( 14 ) is used as an accumulator. Fluid arrangement according to claim 2, characterized in that the first consumer in the first switching state comprises an additional Lüftweg for use with the cylinder as pressure accumulator Fluid arrangement according to one of claims 1 to 3, characterized in that the pump is connected to the first consumer and a first conveying direction for transferring the first consumer in a first switching state and the first conveying direction opposite second conveying direction for transferring the first consumer in a second Switching state includes. Fluid arrangement according to one of claims 1 to 4, characterized in that the second consumer is a transmission actuator ( 12 ), in particular a hydrostatic transmission actuator. Fluid arrangement according to claim 5, characterized in that the transmission actuator ( 12 ) a hydraulic swivel actuator ( 24 ) and / or a hydraulic shear actuator ( 26 ) for actuating a transmission. Fluid arrangement according to claim 6, characterized in that a safety system is provided in order to prevent a failure of the pump ( 22 ) to transfer the transmission in a neutral position. Fluid arrangement according to one of claims 1 to 7, characterized in that the second consumer via a valve ( 40 ), in particular via an additional check valve, from the pump ( 22 ) and the first consumer is separable. Method for the fluidic actuation of a first consumer and / or second consumer of a motor vehicle, with a fluidic energy source, in particular with a fluid arrangement ( 10 . 38 ) according to one of claims 1 to 6, comprising the following steps: - transfer of the first consumer into a first switching state by the pump ( 22 ), - storing working fluid in a section of the first consumer designed as an accumulator, - connecting the second consumer to the hydraulic circuit through the valve logic ( 30 ), - actuation of the second consumer by the pump ( 22 ) and / or the accumulator of the first consumer. A method according to claim 9, characterized in that in case of failure of the pump ( 22 ) When converting the first consumer into a first switching state or when holding the first consumer in the first switching state stored in the pressure accumulator of the first consumer working fluid for transferring the transmission is used in a neutral position by means of the second consumer.

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