Two-piece oil delivery system for hybrid shock absorbers

Abstract

The invention relates to a hybrid module (1) for transmitting drive energy from a first drive device and a second drive device (2) to a transmission input shaft (3), wherein a separating clutch (4) is present, which is designed to separate and establish a torque flow or a force flow between at least one drive device (2) and the transmission input shaft (3), wherein a torsional vibration damper (5) is connected to the torque flow or the force flow, wherein a hydraulic fluid line (6) is contained in the transmission input shaft (3), which is designed so that both the separating clutch (4) and the torsional vibration damper (5) can be supplied with hydraulic fluid. The invention also relates to a drive train of a motor vehicle having such a hybrid module (1).

Description

Technical Field

[0001] The invention relates to a hybrid module, which is used to transmit drive energy from a first drive device (such as an internal combustion engine) on the one hand and from a second drive device (such as an electric machine, for example, which can be operated as an electric motor and as a generator) on the other hand in the direction of a transmission input shaft / output shaft, wherein a separating clutch is present, which is designed to separate and establish a torque flow or force flow between at least one or two of the drive devices on the one hand and the transmission input shaft on the other hand, wherein a torsional vibration damper (for example in accordance with the type of a dual mass flywheel) is also connected in this torque flow or force flow. Background Art

[0002] Similar devices are known from the prior art, for example WO 2015 / 172 784 A2. For example, the document discloses a torque transmission device for a hybrid vehicle. The proposed subject relates to a torque transmission device for being arranged in a drive train of a hybrid vehicle having an internal combustion engine, a transmission and an electric motor, wherein the electric motor is arranged in the torque transmission device. In this case, the torque transmission device comprises a separation clutch with a clutch actuation device and a primary torsional vibration damper on the crankshaft side, the separation clutch being used to disconnect the internal combustion engine from the transmission. The prior invention is characterized by a secondary torsional vibration damper on the transmission side arranged radially and axially inside the rotor, the secondary torsional vibration damper being arranged directly in the output flange on the transmission side of the torque transmission device. This can increase the installation space for the primary torsional vibration damper on the crankshaft side, so that the installation space can be optimally designed. For a torque transmission device that originally does not have a secondary damper, the primary damper can instead be designed smaller and more compactly, because the secondary damper can support vibration reduction. Since the secondary damper is arranged inside the rotor of the electric machine and directly in the output flange of the torque transmission device on the transmission side, it requires only little or no additional installation space. The installation space thus freed up can therefore be used, for example, to reduce, in particular axially shorten, the torque transmission device or to enlarge the electric machine.

[0003] In another patent application of the applicant, DE 10 2016 217 220 A1, the basic principle of connecting a torsional vibration damper to a drive train with a hybrid module is proposed. A hybrid module for a drive train is disclosed, which comprises: an input member for indirect or direct connection of the hybrid module to a drive device; an output member for indirect or direct connection to a transmission device; an electric machine with a stator and a rotor; and a transmission device, which is arranged between the rotor and the output member and is designed to reduce rotational non-uniformity. In this case, it is particularly noted in this prior patent application that the transmission device is designed as a buffer, which has at least one elastic element and at least one mass coupled to the elastic element.

[0004] In addition, DE 10 2010 048 507 A1 also discloses a hybrid module with a torsional vibration damper. In particular, a power transmission device and a hybrid drive device are proposed. The prior document relates to a power transmission device, which includes at least one wet clutch, which has an input part that can be connected to a first drive unit and an output part that is at least indirectly connected to a rotationally fixed input part of a device for vibration reduction that is arranged in series in the force flow toward the wet clutch. The document also discloses a hub element of another second drive unit that is at least indirectly connected to a rotationally fixed input part of the device for vibration reduction and an output part of the device for vibration reduction that is connected to a transmission input shaft in a rotationally fixed manner. In the document, the invention actually points out that the output part of the wet clutch is supported and centered on the hub element of the second drive unit, and a radial gap is provided between the connection between the output part of the device for vibration reduction and the transmission input shaft and the input part of the device for vibration reduction (or an element coupled to the input part in a rotationally fixed manner).

[0005] It can thus be seen that vibration dampers, in particular torsional vibration dampers, are increasingly being used in hybrid modules, for example vibration dampers of the type of torsional vibration dampers. Unlike torque converters, in which the vibration dampers are operated in a completely flooded environment, injection oiling is usually only provided for hybrid modules.

[0006] However, too high a wear has been complained of in the solutions known hitherto. Summary of the invention

[0007] The object of the present invention is therefore to eliminate or at least mitigate the disadvantages of the prior art. In particular, a solution for reducing wear should be proposed. Furthermore, it should be possible to lubricate a plurality of functional elements installed in the hybrid module, in particular the clutch and the torsional vibration damper, as required. In addition, targeted oiling should be possible. For this purpose, on the one hand, meaningful targeted oil lines should be provided, and on the other hand, oil lines including defined delivery lines should be provided.

[0008] According to the invention, this object is achieved in a hybrid module of this type by including a hydraulic fluid line in the transmission input shaft, which is designed to be able to supply both the separation clutch and the torsional vibration damper with hydraulic fluid, for example oil. For this purpose, a multi-part oil supply line is proposed, which is introduced into the output shaft leading to the transmission, in particular by means of a tubular component.

[0009] Advantageous embodiments are claimed in the dependent claims and are explained in detail below.

[0010] Therefore, it is advantageous if the hydraulic fluid line is arranged at least in sections concentrically with respect to the transmission input shaft, in particular concentrically and inside the transmission input shaft. In this way, radial installation space can be saved and the installation space that is already present can be used effectively.

[0011] In order to enable the hybrid module to be constructed compactly and to reduce weight as much as possible, it is advantageous if the hydraulic fluid line is arranged / designed via the transmission input shaft itself and / or a / separate pipe installed in the transmission input shaft.

[0012] It has also proven to be effective if the pipe is designed such that the delivered oil flow is divided at least in sections in the radial direction into at least two or more sub-flows. This allows a disconnect clutch, which is designed as a wet clutch, to be supplied with oil in a targeted manner and a torsional vibration damper to be injected with oil in a targeted manner separately from the oil supplied to the disconnect clutch.

[0013] Viewed in the axial direction of the transmission input shaft, the tube projects out from the transmission input shaft, so that each partial flow of the hydraulic medium / hydraulic fluid can be directed in a flow-optimized manner and independently of the other partial flows.

[0014] A favourable embodiment is also characterized in that the tube is designed (in particular dimensioned and geometrically shaped) such that it passes through a wall separating two hydraulic functional spaces from one another in order to supply a separate sub-flow from the conveyed hydraulic fluid to each of the two functional spaces.

[0015] It is also practical if the pipe is designed to convey the inner sub-flow of the at least two sub-flows to the separating clutch and the outer sub-flow / outermost sub-flow to the torsional vibration damper. This reduces flow losses. This allows for a fast, cost-effective construction and assembly, in particular a smart assembly.

[0016] It is advantageous for the compact design of the hybrid module that the distal end section of the tube facing the separating clutch is shaped radially at an angle (e.g. in the manner of an overhang). Here, a predetermined oil subflow can be deflected, for example in a flow-favoring manner, without wasting installation space or having to install additional components.

[0017] Advantageously, the tube is fixed in the transmission input shaft in a force-fitting, form-fitting and / or material-fitting manner. A permanent and / or removable mounting can then be achieved in a proven and simple manner.

[0018] In this case, it has also proven effective if the tube has a curvature which is preferably symmetrical, for example point-symmetrical, with respect to the central axis of the tube.

[0019] If the bulge is in direct contact with the inner side of the transmission input shaft with its outer side, a connection, for example a fixed positional fixation relative to one another, can be produced using an interference fit.

[0020] For the holding force it is sufficient if the surface of the bulge forms only a partial section of the surface of the tube, which preferably is less than 30%, more preferably less than 12.5%.

[0021] Finally, the invention also relates to a drive train of a motor vehicle, such as a passenger vehicle, a truck or another commercial vehicle, which has a hybrid module according to the invention.

[0022] In other words, the multi-part oil supply line is thus realized by introducing a tubular component into the output shaft. The tubular component is designed in such a way that the oil flow to be supplied is divided at least in sections in the radial direction and / or the tubular component can protrude axially beyond the through-opening in the output shaft in the axial direction and / or the tubular component penetrates a “wall” delimiting between two functional spaces and can thus selectively fill the functional spaces with oil by means of the oil flowing through the tubular component.

[0023] In principle, it is possible to split the supplied oil flow in the region of the output shaft or to conduct two oil flows supplied externally independently of one another. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is explained in detail below with the aid of the accompanying drawings. A number of different embodiments are implemented here. It shows:

[0025] Figure 1 A detail of a hybrid module according to the invention in longitudinal section according to a first embodiment,

[0026] Figure 2 Figure 1 A magnified view of region II,

[0027] Figure 3 In accordance with Figure 2 A further embodiment of a hybrid module according to the invention is shown in the diagram of

[0028] Figure 4 exist Figure 3 The embodiment shown in Figure 3 A partial cross-sectional view of line IV, and

[0029] Figure 5 In reference Figure 2 A third embodiment is shown in the diagrammatic form of the invention, in which the tubular component inside the transmission input shaft has an additional radial extension for deflecting the oil flow.

[0030] The drawings are of a schematic nature only and are only useful for understanding the invention. Identical elements are provided with the same reference numerals. DETAILED DESCRIPTION

[0031] Figure 1 A hybrid module 1 according to the invention is shown in longitudinal section in a first embodiment. The hybrid module 1 has a first drive machine (not shown) in the manner of an internal combustion engine. The hybrid module also has a second drive machine 2 in the manner of an electric machine.

[0032] The hybrid module 1 is designed to transfer torque from two drive devices to a transmission input shaft 3. The transmission input shaft 3 transfers the torque to a transmission (not shown). Therefore, the transmission input shaft serves as an input shaft for the transmission and as an output shaft of the hybrid module 1.

[0033] A (wet) separating clutch 4, for example in the manner of a multi-disk clutch or multi-plate clutch, is also present in the hybrid module 1. A torsional vibration damper 5 is also included. The torsional vibration damper 5 is designed in the manner of a dual-mass damper with spring elements.

[0034] There is a hydraulic fluid line 6. The hydraulic fluid line 6 is formed on the one hand by the transmission input shaft 3 and on the other hand by a pipe 7, which can also be referred to as a tubular component. As a result, the total fluid flow, that is, the hydraulic fluid flow, more precisely the oil flow, is divided into a first sub-flow 8 and a second sub-flow 9.

[0035] As in accordance with Figure 1As also shown in the first embodiment of the invention, the first substream 8 can also be further divided. The first substream 8 is at least partially supplied to the separation clutch 4. The second substream 9 is supplied to the torsional vibration damper 5. For this purpose, for example, a through-hole 11 is provided at a suitable position in the component 10 fixed to the crankshaft.

[0036] The tube 7 has a projection 12 . The projection 12 passes through the wall 13 so that two mutually separated functional spaces 14 and 15 can each be supplied with one of the two partial flows 8 and 9 . The projection 12 is designed as a distal section 16 of the tube 7 .

[0037] Figure 2 The division of the partial flows 8 and 9 and the routing of these partial flows in the direction of two different functional spaces 14 and 15 are also shown in detail.

[0038] Figure 3 The embodiment shown in corresponds generally to Figure 2 The embodiment shown in FIG. 1 is different, however, in the length of the tube 7. The tube 7 is arranged in accordance with Figure 2 In the embodiment according to Figure 3 The tube 7 used in the embodiment of is much shorter. The tube only extends a small portion into the transmission input shaft 3, that is, less than 10% of the transmission input shaft length.

[0039] exist Figure 4 A partial cross section is shown in Figure 3 The tube 7 has a bulge 17 on opposite sides, which extends over the entire length of the tube 7. Of course, it is also conceivable that the bulge 17 is present only in the region of the tube 7 that is present inside the transmission input shaft 3 or only in a partial region there. The second partial flow 9 is guided between the inner surface 18 of the transmission input shaft 3 and the outer surface 19 of the tube 7, whereas the first partial flow 8 of the hydraulic fluid is guided inside the tube 7.

[0040] exist Figure 5 In the embodiment shown in FIG. 1 , the distal section 16 transitions into a radially angled flange 20. This simplifies the deflection of the oil flow supplied to the second functional space 15 (ie, the deflection of the second sub-flow 9).

[0041] Reference numerals list

[0042] 1 Hybrid module

[0043] 2 Second drive device

[0044] 3 Transmission input shaft

[0045] 4 Disengagement clutch

[0046] 5 Torsional vibration damper

[0047] 6 Hydraulic fluid lines

[0048] 7 Tubes

[0049] 8 First substream

[0050] 9 Second substream

[0051] 10 Components fixed to the crankshaft

[0052] 11. Piercing

[0053] 12 Excess

[0054] 13 Wall

[0055] 14. The first functional space

[0056] 15 Second Functional Space

[0057] 16 Distal section of the tube

[0058] 17 Arch

[0059] 18 Inner surface of transmission input shaft

[0060] 19 Outer surface of the tube

[0061] 20 Flange.

Claims

1. A hybrid module (1), for transmitting drive energy from a first drive device and a second drive device to a transmission input shaft (3), wherein: A separating clutch (4) is provided, which is designed to separate and establish a torque flow or a force flow between at least one of the drive devices and the transmission input shaft (3), wherein a torsional vibration damper (5) is also connected to the torque flow or the force flow, and the torsional vibration damper (5) is designed in the manner of a dual-mass damper with a spring element, characterized in that a hydraulic fluid line (6) is contained in the transmission input shaft (3), and the hydraulic fluid line is designed to be able to supply hydraulic fluid to both the separating clutch (4) and the torsional vibration damper (5), wherein the hydraulic fluid is used to lubricate the torsional vibration damper (5). The hydraulic fluid line (6) is arranged via the transmission input shaft (3) itself and / or a tube (7) installed in the transmission input shaft (3), the tube (7) being constructed so that the delivered oil flow is divided into at least two sub-flows at least in sections in a radial direction, and the tube (7) being designed so that the tube passes through a wall (13) separating two hydraulic functional spaces (14 and 15) from each other, so as to supply a separate sub-flow (8 or 9) from the delivered hydraulic fluid to one of the two hydraulic functional spaces (14 or 15).

2. The hybrid power module (1) according to claim 1, characterized in that The hydraulic fluid line (6) is arranged at least in sections concentrically relative to the transmission input shaft (3).

3. The hybrid power module (1) according to claim 1, characterized in that Viewed in the axial direction of the transmission input shaft (3), the tube (7) protrudes from the transmission input shaft (3).

4. The hybrid power module (1) according to claim 3, characterized in that The pipe (7) is designed in such a way that an inner subflow (8) of the at least two subflows is supplied to the separator clutch (4) and an outer subflow (9) is supplied to the torsional vibration damper (5).

5. The hybrid power module (1) according to claim 1, characterized in that The distal end section (16) of the tube (7) facing the separating clutch (4) is formed in an angled manner in the radial direction.

6. The hybrid module (1) according to any one of claims 1 to 5, characterized in that The tube (7) is fixed in the transmission input shaft (3) in a force-fitting, form-fitting and / or material-locking manner. 7 . A drive train for a motor vehicle having a hybrid module ( 1 ) according to claim 1 .

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