DE102016214932A1 - Hydraulic actuation system for actuating vehicle components - Google Patents

Abstract

The invention relates to a hydraulic actuating system for actuating vehicle components, wherein the vehicle components comprise at least one first consumer (28), at least one second consumer (30) and at least one third consumer (32), at least two fluid arrangements (10, 42, 48) for Actuating at least one of the vehicle components, wherein the fluid arrangements (10, 42, 48) via at least one valve logic (24) are connectable to each other, wherein at least one consumer (28, 30, 32) via the interconnected at least two fluid assemblies (10, 42 48 ), wherein each fluid assembly comprises at least: two fluid pumps (16, 18, 50, 52) for delivering a working fluid, a fluid pump drive (14) for driving the at least two fluid pumps (16, 18, 50, 52) together; at least one valve logic (20, 22) for connecting the at least two fluid pumps (16, 18, 50, 52) to the first consumer (28), the second consumer (30) and / or the third consumer (32). Thereby, a hydraulic actuation system for the fluidic actuation of vehicle components can be provided, which is designed simpler.

Description

The invention relates to a hydraulic actuating system for actuating vehicle components.

The publication WO2015 / 067259 A1 shows a fluid assembly for fluidly actuating two motor vehicle components. The fluid arrangement has two fluid flow sources, both of which each comprise a fluid pump with a first conveying direction and with a second conveying direction opposite to the first conveying direction. The fluid flow sources are fluidly interconnected in the fluid arrangement such that both fluid flow sources are suitable for respectively actuating two of the motor vehicle components, wherein each of the fluid flow sources is suitable for actuating a motor vehicle component which can also be actuated by the other of the fluid flow sources.

The publication WO 2015/090317 A1 shows a fluid assembly for fluidly actuating two motor vehicle components, namely a clutch and a transmission component. The fluid arrangement has a fluid flow source and this fluid flow source comprises a fluid pump with a first conveying direction and with a second conveying direction opposite to the first conveying direction. In this case, the fluid flow source is fluidly connected in the fluid arrangement in such a way that the fluid flow source can be used to actuate both motor vehicle components.

It is the object of the invention to provide a hydraulic actuating system for the fluidic actuation of vehicle components, which is designed simpler.

The object is achieved according to the invention by a hydraulic actuating system for actuating vehicle components 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 hydraulic actuating system for actuating vehicle components, wherein the vehicle components comprise at least one first consumer, at least one second consumer and at least one third consumer, with at least two fluid arrangements for actuating at least one of the vehicle components, wherein the fluid arrangements can be connected to one another via at least one valve logic wherein at least one consumer is operable together via the interconnected at least two fluid assemblies, each fluid assembly comprising at least:
two fluid pumps for conveying a working fluid, a fluid pump drive for jointly driving the at least two fluid pumps, at least one valve logic for connecting the at least two fluid pumps to the first consumer, the second consumer and / or the third consumer.

By way of example, the first consumer may be a clutch, the second consumer a gearbox actuator, and the third consumer a clutch cooling. In particular, the clutch may be a dual clutch and each fluid assembly may actuate a partial clutch. The third consumer may be configured as a clutch cooling such that each fluid assembly can actuate a partial clutch cooling. By way of example, the second consumer may be configured such that one fluid arrangement can actuate one gear actuator and the other fluid arrangement can actuate a selection actuator. The working fluid may be, for example, an engine oil, a transmission oil, a hydraulic oil, coolant, water or oil-water mixture. The fluid pump drive may be, for example, an electric motor. The at least two fluid pumps can be driven via a shaft of the fluid pump drive. The at least two fluid pumps and the fluid pump drive together form a pump actuator. In particular, the fluid pumps can each be connected to a separate hydraulic circuit, so that, for example, the first fluid pump can actuate the first consumer and / or the second consumer via a first hydraulic circuit and the second fluid pump can actuate the third consumer via a second hydraulic circuit. Furthermore, as a result, the energy requirement for the fluid pumps can be reduced since only one fluid pump drive is supplied with energy. In this way, a fluid arrangement for the fluidic actuation of the motor vehicle components can be made simpler. The at least one valve logic may be formed as a so-called boost valve, and for example, at least three switch positions, in particular valve operating positions have. For example, in a first switching position for bridging a low-load region, the second fluid pump can be connected to the hydraulic circuit of the first fluid pump in order to jointly actuate the first consumer and / or second consumer for a clutch and / or gear function. In a second switching position, the respective fluid pumps in their respective hydraulic circuit can promote a working fluid. In a third switching position, the first fluid pump can be connected to the hydraulic circuit of the second fluid pump to jointly promote working fluid to the third consumer. Furthermore, other switching positions may be possible, for example, an idle position or a stop position.

Furthermore, the valve logic between the two fluid arrangements may be a so-called multiplier valve, which may likewise have at least three switching positions, in particular valve operating positions. In a first switching position, both cooling oil streams of the two double pumps of the respective fluid arrangements can jointly supply a consumer of the first fluid arrangement with working fluid, in a second switching position jointly a consumer of the second fluid arrangement or in a third valve function position, each fluid arrangement can actuate its respective consumer separately.

In particular, the valve logic for actuating the loads and the valve logic between the fluid assemblies may be the same or different valve logics. With the same valve logics, component storage can be simplified and the structure of the hydraulic actuation system can also be simplified.

Thereby, a hydraulic actuation system for the fluidic actuation of vehicle components can be provided, which is designed simpler.

It is preferred that at least one third consumer can be actuated via the at least two interconnected fluid arrangements. In this way, for example, the dynamics and / or the pressure for actuating the third consumer to be actuated can be increased.

In a preferred embodiment, the third consumer is a clutch cooling. In this case, the maximum possible cooling capacity is increased by the connection of the fluid arrangements. In particular, in a dual clutch, the third consumer may each be a partial clutch cooling for a partial clutch.

Preferably, a valve arrangement is arranged between the first consumer and the valve logic. The valve arrangement can have a switching position, in particular a valve function, for activating the main function of the first consumer, for example the clutch actuation. In particular, the valve arrangement can furthermore have a second switching position, which connects the consumer to a reservoir. In this way it can be ensured that the consumer can be actuated by the fluid pumps and, when not actuated, the working fluid from the consumer can flow back into a reservoir. Furthermore, the valve arrangement can have further switching positions, for example an idling position or a stop position.

In a preferred embodiment, a valve arrangement is arranged between the second consumer and the valve logic. The valve logic may have a switching position, in particular a valve function, for activating the main function of the second consumer, for example a gear change. In particular, the valve arrangement can furthermore have a second switching position, which connects the consumer to a reservoir. In this way it can be ensured that the consumer can be actuated by the fluid pumps and, when not actuated, the working fluid from the consumer can flow back into a reservoir. Furthermore, the valve arrangement can have further switching positions, for example an idling position or a stop position.

It is preferred that the at least two fluid pumps each comprise a first conveying direction and a second conveying direction opposite to the first conveying direction. In this way, the at least two fluid pumps can actuate, for example, a first consumer with the first conveying direction and a second consumer with the second conveying direction. In particular, the fluid pumps can jointly actuate the first consumer and the second consumer. As a result, fluid pumps can be used with a smaller volume flow, so that the energy requirement can be reduced. Furthermore, a further pump actuator for actuating the first consumer, the second consumption or the third consumer can be saved, whereby the component requirement and also the space requirement for the fluid arrangement can be saved.

The at least two fluid pumps preferably have the same or different stroke volumes. In particular, the fluid pumps can be designed for the same or for different nominal pressures. When using fluid pumps with the same stroke volume, the component requirements can be simplified, since in each case the same fluid pumps can be used. When using a pumping device with fluid pumps with different stroke volumes different fluid pumps can be used. The fluid pumps can be selected such that they are sufficient for the actuation of the first consumer and the second consumer. This can reduce the energy requirement of the pump. In this case, a smaller pump for a high pressure area and a larger pump for a low pressure area can be used. In particular, the first fluid pump can be used for the high-pressure region and the second fluid pump for the low-pressure region. In particular, the pump actuator can promote a variable volume flow. For example, when actuated by a consumer, for example, when engaging a gear or when operating a clutch, the low-pressure area with a high volume and the high-pressure area are driven with a small volume. For example, due to the variability of the flow rate, a low-pressure region of a clutch can very quickly be passed through. This can be advantageous, for example, in a dual clutch, since the Lüftweg the clutch must be traversed very often. As a result, the fluid arrangement can enable high dynamics.

In a preferred embodiment, the second fluid pump can be connected to a hydraulic rectifier. As a result, working fluid can be provided independently of the direction of rotation by the second fluid pump.

It is preferred that the hydraulic rectifier comprises an AND valve and an OR valve or at least two check valves. The AND valve can be realized, for example, as a two-pressure valve, and can have two ports, with which the AND valve can be connected to the respective terminals of the second fluid pump. As a third port, the AND valve may include a port to a reservoir to provide working fluid. Through the AND valve or the two-pressure valve can be made possible in a simple manner that the second fluid pump can provide a delivery pressure independent of direction of rotation.

Preferably, a fourth consumer can be actuated by the first fluid pump, preferably a K0 clutch or an all-wheel clutch, and a fifth consumer, preferably a wheelset cooling, can be actuated by the second fluid pump. For example, in a hybrid vehicle, the fourth consumer may be a K0 clutch for engine decoupling or generally an all-wheel clutch. The fifth consumer may be, for example, a wheelset cooling or a parking brake.

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

1 a schematic representation of a first embodiment of a fluid assembly for a hydraulic actuation system,

2 a schematic representation of a second embodiment of a fluid assembly for a hydraulic actuation system, and

3 a schematic representation of a third embodiment of a fluid assembly for a hydraulic actuation system.

In the following description of the figures, the same reference symbols are used for the same terms / components.

In the 1 . 2 and 3 only one half of a hydraulic actuating system are shown.

1 shows a schematic representation of a first embodiment of a fluid assembly 10 for a hydraulic actuation system. The dashed line 12 is a line of symmetry between the fluid assembly 10 and a second fluid arrangement, not shown, of the hydraulic actuation system. In this case, the second fluid arrangement can be like the fluid arrangement 10 be educated.

The fluid arrangement 10 includes a fluid pump drive 14 , a first fluid pump 16 , a second fluid pump 18 , a first valve logic 20 , a second valve logic 22 , a third valve logic 24 , a hydraulic rectifier 26 , a first consumer 28 , a second consumer 30 and a third consumer 32 ,

The fluid pump drive 14 is an electric motor. The first fluid pump 16 and the second fluid pump 18 together form a double pump, which together from the fluid pump drive 14 are driven. The fluid pumps 16 . 18 have an uneven stroke volume and are designed for different nominal pressures. This is the first fluid pump 16 a high pressure pump and the second fluid pump 18 a low pressure pump. The first fluid pump 16 and the second fluid pump 18 are each designed as a reversing pump having a first conveying direction and a second conveying direction opposite to the first conveying direction. The first conveying direction and the second conveying direction are arrows in the fluid pumps 16 . 18 shown. Depending on the direction of rotation of the fluid pump drive 14 can the fluid pumps 16 . 18 a working fluid, such as a transmission oil, in the first conveying direction in the direction of the first consumer 28 and / or the third consumer 32 or in the second conveying direction in the direction of the second consumer 30 promote. The first fluid pump 16 is in addition in both directions with a first AND valve 34 connected to working fluid from a reservoir 36 to promote. It can with the help of the first AND valve 34 be ensured that working fluid can be promoted independent of direction of rotation. The second fluid pump 18 is in both directions with the hydraulic rectifier 26 connected. The hydraulic rectifier 26 includes an OR valve 38 and a second AND valve 40 , The OR valve 38 and the second AND valve 40 are each with the first delivery direction output and the second delivery direction output of the second fluid pump 18 connected. The second AND valve 40 is in addition with a reservoir 36 connected to the working fluid. The reservoir 36 may be the same reservoir as the reservoir 36 of the first AND valve 34 or another reservoir. Through the hydraulic rectifier 26 it can be ensured that working fluid can be made available irrespective of the direction of rotation.

The first consumer 28 may be a first partial clutch of a dual clutch, the second consumer 30 may be a gear actuator of a gear actuator and the third consumer 32 be a clutch cooling for the first part clutch.

The first valve logic 20 , the second valve logic 22 and the third valve logic 24 For example, they can be designed as controllable valves, in particular as boost valves or proportional valves, and each have three switching positions, in particular valve operating positions. The valve arrangements can 20 . 22 . 24 be switched mechanically or electrically in the respective switching positions.

The first valve logic 20 is designed as a boost valve and has three switching positions, in particular valve operating positions on. In the first switching position, in the 1 shown as the top switching position, the first fluid pump 16 in addition to the second fluid pump 18 switched into the low pressure circuit. This promotes the first fluid pump 16 together with the second fluid pump 18 Working fluid in the low-pressure circuit. In the second switching position promotes only the first fluid pump 16 Working fluid to the second consumer 30 and the second fluid pump 18 promotes working fluid in the low pressure circuit. This is in 1 shown. In the third switching position is to bridge the low load range for the operation of the second consumer 30 the second fluid pump 18 the high-pressure circuit of the first fluid pump 16 switched on, so that the fluid pumps 16 . 18 together the second consumer 30 actuate.

The second valve logic 22 is designed as a boost valve and has three switching positions, in particular valve operating positions on. In the first switching position, in the 1 shown as the top switching position, the first fluid pump 16 in addition to the second fluid pump 18 switched into the low pressure circuit. This promotes the first fluid pump 16 together with the second fluid pump 18 Working fluid in the low-pressure circuit. In the second switching position promotes only the first fluid pump 16 Working fluid to the first consumer 28 and the second fluid pump 18 promotes working fluid in the low pressure circuit. This is in 1 shown. In the third switching position is to bridge the low load range for the operation of the first consumer 28 the second fluid pump 18 the high-pressure circuit of the first fluid pump 16 switched on, so that the fluid pumps 16 . 18 together the first consumer 28 actuate.

The third valve logic 24 is designed as a multiplication valve and has three switching positions, in particular valve operating positions on. In the first switching position, in the 1 shown as the uppermost switching position, the working fluid flow for the third consumer 32 switched to the working fluid flow for the third consumer of the second fluid arrangement, not shown. This will promote the fluid pumps 16 . 18 the fluid assembly 10 together or the fluid pump 18 alone with at least one of the fluid pumps, not shown, of the second fluid arrangement, not shown, working fluid to the third consumer of the second fluid arrangement. In the second switching position promote the fluid assembly 10 and the second fluid assembly, not shown, separate working fluid to the respective third consumer. This is in 1 shown. In the third switching position promotes at least one of the fluid pumps 16 . 18 the fluid assembly 10 and at least one of the fluid pumps, not shown, of the second fluid arrangement not shown together, working fluid to the third consumer 32 ,

The high pressure circuit with the first fluid pump 16 Further consumers, such as an all-wheel drive can be added and the low pressure circuit with the second fluid pump 18 can have more features, such as one. Wheelset cooling, be added. This is not shown.

The 2 is different from the 1 in that the fluid assembly 42 a second hydraulic rectifier 44 having. The second hydraulic rectifier 44 points instead of an OR valve 38 For each direction of flow a check valve 46 on.

In 3 is a schematic representation of a third embodiment of a fluid assembly 48 for a shown for a hydraulic actuation system. The dashed line 12 is a line of symmetry between the fluid assembly 48 and a second fluid arrangement, not shown. In this case, the second fluid arrangement can be like the first fluid arrangement 48 be educated.

The fluid arrangement 48 includes a fluid pump drive 14 , a first fluid pump 50 , a second fluid pump 52 , a second valve logic 22 , a third valve logic 24 , a first valve arrangement 54 , a second valve arrangement 56 , a first consumer 28 , a second consumer 30 and a third consumer 32 ,

The first fluid pump 50 and the second fluid pump 52 form a double pump, which from the fluid pump drive 14 is pressed. The fluid pumps 50 . 52 promote the working fluid from a reservoir 36 only in the direction of the second valve arrangement 22 , This will be in 3 through the respective arrow in the fluid pumps 50 . 52 clarified, continue to point the fluid pumps 50 . 52 a different nominal pressure. The first fluid pump 50 is a high pressure pump and the second fluid pump 52 is a low pressure pump.

The first valve arrangement 54 and the second valve assembly 56 are configured as activation valves for activating the main function, such as clutch actuation or gear change, and in this exemplary embodiment each have two shift positions, in particular valve operating positions. A first switching position, in 3 represented as the highest position, each connects a reservoir 36 with the respective consumer 28 . 30 , In the second switching position become the first consumer 28 and / or the second consumer 30 each with the second valve assembly 22 connected to from the first fluid pump 50 or the fluid pumps 50 . 52 to be operated together.

LIST OF REFERENCE NUMBERS

10

 fluid arrangement

12

 line of symmetry

14

 Fluid pump drive

16

 first fluid pump

18

 second fluid pump

20

 first valve logic

22

 second valve logic

24

 third valve logic

26

 hydraulic rectifier

28

 first consumer

30

 second consumer

32

 third consumer

34

 first AND valves

36

 reservoir

38

 Or valve

40

 second AND valve

42

 fluid arrangement

44

 second hydraulic rectifier

46

 check valve

48

 fluid arrangement

50

 third fluid pump

52

 fourth fluid pump

54

 first valve arrangement

56

 second valve arrangement

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

• WO 2015/067259 A1 [0002]
• WO 2015/090317 A1 [0003]

Claims (10)

Hydraulic actuation system for actuating vehicle components, the vehicle components having at least one first consumer ( 28 ), at least one second consumer ( 30 ) and at least one third consumer ( 32 ), with at least two fluid arrangements ( 10 . 42 . 48 ) for actuating at least one of the vehicle components, wherein the fluid arrangements ( 10 . 42 . 48 ) via at least one valve logic ( 24 ), whereby at least one consumer ( 28 . 30 . 32 ) via the interconnected at least two fluid arrangements ( 10 . 42 48 ) is operable together, each fluid assembly comprising at least: two fluid pumps ( 16 . 18 . 50 . 52 ) for conveying a working fluid, a fluid pump drive ( 14 ) for jointly driving the at least two fluid pumps ( 16 . 18 . 50 . 52 ), at least one valve logic ( 20 . 22 ) for connecting the at least two fluid pumps ( 16 . 18 . 50 . 52 ) with the first consumer ( 28 ), the second consumer ( 30 ) and / or the third consumer ( 32 ). Hydraulic actuating system according to claim 1, characterized in that at least one third consumer ( 32 ) via the at least two interconnected fluid arrangements ( 10 . 42 . 48 ) is operable. Hydraulic actuation system according to claim 1 or 2, characterized in that the third consumer ( 32 ) is a clutch cooling. Hydraulic actuating system according to claim 1 to 3, characterized in that between the first consumer ( 28 ) and the valve logic ( 22 ) a valve arrangement ( 56 ) is arranged. Hydraulic actuating system according to one of claims 1 to 4, characterized in that between the second consumer ( 30 ) and the valve logic ( 22 ) a valve arrangement ( 54 ) is arranged. Hydraulic actuating system according to claim 1 to 3, characterized in that the at least two fluid pumps ( 16 . 18 . 50 . 52 ) each comprise a first conveying direction and a second conveying direction opposite to the first conveying direction. Hydraulic actuating system according to claim 6, characterized in that the at least two fluid pumps ( 16 . 18 . 50 . 52 ) have the same or different stroke volumes. Hydraulic actuating system according to claim 6 or 7, characterized in that the second fluid pump ( 18 ) with a hydraulic rectifier ( 26 . 44 ) is connectable. Hydraulic actuating system according to claim 8, characterized in that the hydraulic rectifier ( 26 . 44 ) an AND valve ( 40 ) and an OR valve ( 38 ) or at least two check valves ( 46 ). Hydraulic actuating system according to one of claims 1 to 9, characterized in that by the first fluid pump ( 16 . 50 ) a fourth consumer, preferably a K0 clutch or an all-wheel clutch, is actuated, and by the second fluid pump ( 18 . 52 ) a fifth consumer, preferably a Radsatzkühlung, can be actuated.

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