FLUID ASSEMBLY

Abstract

A fluid arrangement for controlling a transmission of a motor vehicle in a hydraulic circuit is disclosed. The fluid arrangement includes a dual clutch including a first sub-clutch and a second sub-clutch, wherein the first sub-clutch is configured to be actuated via a first reversing pump actuator and the second sub-clutch is configured to be actuated via a second reversing pump actuator. The first and second reversing pump actuators each have a first delivery direction and a second delivery direction for delivering a working fluid in the hydraulic circuit. A first gear ratio mechanism with a variable gear ratio for actuating the dual clutch is configured to be actuated via the first delivery direction of the first and second reversing pump actuators a and a second gear ratio mechanism with a variable gear ratio for actuating a consumer arrangement is configured to be actuated via the second delivery direction.

Claims

1. A fluid arrangement for controlling a transmission of a motor vehicle in a hydraulic circuit, comprising: a dual clutch including a first sub-clutch and a second sub-clutch, wherein the first sub-clutch of the dual clutch is configured to be actuated via a first reversing pump actuator, wherein the second sub-clutch of the dual clutch is configured to be actuated via a second reversing pump actuator, wherein the first reversing pump actuator and the second reversing pump actuator each have a first delivery direction and a second delivery direction, opposing the first delivery direction, for delivering a working fluid in the hydraulic circuit, wherein a first gear ratio mechanism with a variable gear ratio for actuating the dual clutch is configured to be actuated via the first delivery direction of the first reversing pump actuator and the second reversing pump actuator and a second gear ratio mechanism with a variable gear ratio for actuating a consumer arrangement is configured to be actuated via the second delivery direction, and wherein the first gear ratio mechanism and the second gear ratio mechanism are different.

2. The fluid arrangement as claimed in claim 1, wherein the first reversing pump actuator and the second reversing pump actuator each have a load-dependent delivery stroke adjustment, wherein the delivery stroke adjustment is configured such that the delivery stroke adjustment can act in the direction of the second delivery direction to form the second gear ratio mechanism.

3. The fluid arrangement as claimed in claim 2, wherein an adjusting mechanism for adjusting a delivery volume of a respective reversing pump actuator is acted upon by an outlet pressure of the respective reversing pump actuator via a control line.

4. The fluid arrangement as claimed in claim 1, wherein the first gear ratio mechanism comprises a first lever actuator mechanism for the first sub-clutch and a second lever actuator mechanism for the second sub-clutch.

5. The fluid arrangement as claimed in claim 4, wherein the first lever actuator mechanism and the second lever actuator mechanism are each connected to a hydraulic cylinder for actuating a respective lever actuator mechanism.

6. The fluid arrangement as claimed in claim 1, wherein the consumer arrangement is configured to be connected to the first reversing pump actuator and/or the second reversing pump actuator via a valve arrangement.

7. The fluid arrangement as claimed in claim 1, wherein the consumer arrangement is a hydraulic gear selector piston arrangement.

8. The fluid arrangement as claimed in claim 1, wherein the consumer arrangement comprises a first consumer and a second consumer.

9. The fluid arrangement as claimed in claim 8, wherein the second consumer is a transmission arrangement or parking lock.

10. The fluid arrangement as claimed in claim 8, wherein the first consumer and the second consumer are configured to be actuated via a valve device, wherein the valve device can be connected to a valve arrangement for connecting the first consumer and/or the second consumer to the first reversing pump actuator or the second reversing pump actuator.

11. The fluid arrangement as claimed in claim 6, wherein the valve arrangement is an OR valve.

12. A fluid arrangement for transmission control of a motor vehicle in a hydraulic circuit, comprising: a dual clutch including a first sub-clutch and a second sub-clutch, wherein the first sub-clutch is actuated via a first reversing pump actuator and the second sub-clutch is actuated via a second reversing pump actuator, the first reversing pump actuator and the second reversing pump actuator each having a first delivery direction and a second delivery direction opposite the first delivery direction for delivering a working fluid in the hydraulic circuit; and a consumer arrangement including a first consumer and a second consumer actuated via a valve device, wherein the valve device is configured to connect the first consumer to the first reversing pump actuator and the second consumer to the second reversing pump actuator.

13. The fluid arrangement of claim 12, further comprising: a first gear ratio mechanism having a variable gear ratio for actuating the dual clutch, the first gear ratio mechanism being configured to be actuated via the first delivery direction of the first reversing pump actuator and the second reversing pump actuator; and a second gear ratio mechanism having a variable gear ratio for actuating the consumer arrangement, the second gear ratio mechanism being configured to be actuated via the second delivery direction.

14. The fluid arrangement of claim 12, further comprising: a first valve connected in parallel with the first reversing pump actuator; and a second valve connected in parallel with the second reversing pump actuator, wherein the first valve and the second valve each have two connections connected to the first valve and the second valve, respectively, and a third connection connected to a reservoir for providing the working fluid for the hydraulic circuit.

15. The fluid arrangement of claim 12, wherein the first consumer is a hydraulic gear selector piston arrangement and the second consumer is a parking brake.

16. The fluid arrangement of claim 15, wherein the hydraulic gear selector piston arrangement comprises a plurality of gear selector pistons each connected to a valve control device, wherein each gear selector piston comprises a cylinder in which a piston can be axially displaced in the cylinder for selecting a gear.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present disclosure is explained by way of example below with reference to the accompanying drawing with the aid of a preferred exemplary embodiment, wherein the features illustrated below can represent an aspect of the present disclosure both individually in each case and in combination. The drawing shows:

[0021] FIG. 1 a simplified illustration of a fluid arrangement having two reversing pump actuators for fluidically actuating a dual clutch and a consumer arrangement.

DETAILED DESCRIPTION

[0022] In FIG. 1, a fluid arrangement in the form of a transmission control 10 having a first reversing pump actuator 12 and a second reversing pump actuator 14 is illustrated in a simplified manner. The reversing pump actuators 12 and 14 are fluid pumps which, as indicated by the double-headed arrow, can be operated in opposing delivery directions. The reversing pump actuators 12 and 14 enable the actuation of a dual clutch 18 and a consumer arrangement 16 in a particularly simple manner.

[0023] The dual clutch 18 comprises a first sub-clutch 20 and a second sub-clutch 22. The first sub-clutch 20 of the dual clutch 18 can be actuated by the first reversing pump actuator 12. The second sub-clutch 22 of the dual clutch 18 can be actuated by the second reversing pump actuator 14. The clutch actuation of the first sub-clutch 20 takes place via a first lever actuator 23 and the clutch actuation of the second sub-clutch 22 takes place via a second lever actuator 24. A first hydraulic cylinder 26 and a second hydraulic cylinder 28 serve as a drive for the lever actuator mechanism. The first hydraulic cylinder 26 is connected to the first reversing pump actuator 12 via a hydraulic line and the second hydraulic cylinder 28 is connected to the second reversing pump actuator 24 via a hydraulic line. An actuation of the sub-clutch 20, 22 here can take place in such a way that a hydraulic cylinder piston can be moved axially in the hydraulic cylinder 26, 28 depending on the medium in the hydraulic cylinder 26, 28 in order to actuate the first lever actuator 23 or the second lever actuator 24.

[0024] A first AND valve 30 is associated with the first reversing pump actuator 12 and a second AND valve 32 is associated with the second reversing pump actuator 14. The first AND valve 30 and the second AND valve 32 are each also known as a two-pressure valve. The AND valves 30, 32 each have two connections with which the AND valves 30, 32 are connected to the respective connections of the associated reversing pump actuator 12, 14. As a third connection, the first AND valve 30 and the second AND valve 32 each comprise a connection to a reservoir 34 for providing a working medium, such as a hydraulic oil, for the hydraulic circuit. The reservoir 34 can be a different working medium accumulator or the same working medium accumulator in each case.

[0025] As a result of the AND valve 30, 32 or two-pressure valve, it is possible, in a simple manner, that different transmission functions depending on the direction of rotation can be realized by means of the reversing pump actuators 12, 14. The consumer arrangement 16 is coupled to the two reversing pump actuators 12, 14 via an OR valve 36. The reversing pump actuator 12, 14 which is not directly involved in the actuation of the associated sub-clutch 20, 22 can thus supply the consumer arrangement 16 with a delivery flow and a delivery pressure.

[0026] The consumer arrangement 16 comprises a first consumer in the form of a hydraulic gear selector piston arrangement 38 and a second consumer 40, for example a parking brake. In this exemplary embodiment, the gear selector arrangement 38 comprises four gear selector pistons 42a, 42b, 42c, 42d which are each connected to a valve control 44a, 44b, 44c, 44d. The valve control 44a, 44b, 44c, 44d is designed as a directional valve. Each of the gear selector pistons 42a, 42b, 42c, 42d comprises a cylinder 46a, 46b, 46c, 46d in which a piston 48a, 48b, 48c, 48d can be axially displaced in the cylinder 46a, 46b, 46c, 46d for selecting a gear. The piston 48a, 48b, 48c, 48d divides the interior of the cylinder 46a, 46b, 46c, 46d into a first pressure chamber 50a, 50b, 50c, 50d and a second pressure chamber 52a, 52b, 52c, 52d. The first pressure chamber 50a, 50b, 50c, 50d is connected in each case to the valve control 44a, 44b, 44c, 44d and the second pressure chamber 52a, 52b, 52c, 52d, is connected to the hydraulic circuit.

[0027] The valve control 44a, 44b, 44c, 44d has two switch positions in each case. A first switch position connects the first pressure chamber 50a, 50b, 50c, 50d to a reservoir 34 in each case. The reservoir 34 can be either an individual reservoir in each case or a common continuous reservoir. A second switch position connects the first pressure chamber 50a, 50b, 50c, 50d to the hydraulic circuit. In the first switch position, the piston 48a, 48b, 48c, 48d is moved in the direction of the first pressure chamber 50a, 50b, 50c, 50d in order to disengage a gear for example. In the second switch position, the piston 48a, 48b, 48c, 48d is moved in the direction of the second pressure chamber 52a, 52b, 52c, 52d in order to engage a gear.

[0028] At the side directed towards the consumer arrangement 16, the reversing pump actuator 12, 14 is connected in each case to an adjusting mechanism 56, 58. The adjusting mechanism 56, 58 is illustrated as a piston-cylinder unit and regulates the volumetric flow of the medium delivered by the reversing pump actuator 12, 14 in the direction of the consumer arrangement 16. This occurs in that the adjusting mechanism 56, 58 is coupled in each case to the load or to the pressure on the transmission actuator device 16 and thus transmits a counter force or a counter pressure to the respective reversing pump actuator 12, 14. The adjusting mechanism 56, 58 for adjusting the delivery volume of the respective reversing pump actuator 12, 14 is acted upon by an outlet pressure of the reversing pump actuator 12, 14 via a control line. The reversing pump actuator 12, 14 here is driven in each case with the aid of a pump drive 60, 62, an electric motor in this exemplary embodiment, in order to actuate either a sub-clutch 20, 22 or the consumer arrangement 16. The adjusting mechanism 56, 58 is a load-pressure-dependent delivery stroke adjustment, wherein the stroke adjustment only acts in the direction of the consumer arrangement 16.

LIST OF REFERENCE SIGNS

[0029] 10 Fluid arrangement [0030] 12 First reversing pump actuator [0031] 14 Second reversing pump actuator [0032] 16 Transmission actuator device [0033] 18 Dual clutch [0034] 20 First sub-clutch [0035] 22 Second sub-clutch [0036] 23 First lever actuator [0037] 24 Second lever actuator [0038] 26 First hydraulic cylinder [0039] 28 Second hydraulic cylinder [0040] 30 First valve logic circuit [0041] 32 Second valve logic circuit [0042] 34 Reservoir [0043] 36 OR valve [0044] 38 Hydraulic gear selector piston arrangement [0045] 40 Consumer [0046] 42a, b, c, d Gear selector piston [0047] 44a, b, c, d Valve control [0048] 46a, b, c, d Cylinder [0049] 48a, b, c, d Piston [0050] 50a, b, c, d First pressure chamber [0051] 52a, b, c, d Second pressure chamber [0052] 56 Adjusting mechanism [0053] 58 Adjusting mechanism [0054] 60 Pump drive [0055] 62 Pump drive