WO2017108147A1

WO2017108147A1 - Drive train device

Info

Publication number: WO2017108147A1
Application number: PCT/EP2016/001718
Authority: WO
Inventors: Kai Heukelbach; Bernd Koppitz; Bernhard Ziegler; Tobias Schuster; Lukas Rube; Jan Velthaus; Jan KUHNERT; Timo Stark; Joel BALI; Thomas Grass
Original assignee: Daimler Ag
Priority date: 2015-12-24
Filing date: 2016-10-18
Publication date: 2017-06-29
Also published as: DE102015016938A1; EP3394477A1; CN108431460A

Abstract

The invention relates to a drive train device, in particular for a motor vehicle (44), comprising a torque converter (26), which has at least a first component (10) and a second component (12), which are arranged for rotation with respect to each other and of which at least one component is provided for transmitting a power provided by a drive machine (14) to drive wheels (16), wherein the first component (10) and the second component (12) at least partially form a centripetal pump (18) for supplying an operating medium provided for cooling to a cooling system (20). The invention further relates to a motor vehicle (44) having the drive train device.

Description

A power train assembly

The invention relates to a drive train device and a motor vehicle with a drive train device.

Torque converters are already known from the prior art, which are provided to supply operating means along a stator of the torque converter to a cooling system.

The invention is in particular the object of improving efficiency. It is achieved by an embodiment according to the invention according to claim 1. Further developments of the invention will become apparent from the dependent claims.

The invention relates to a drive train device, in particular for a

Motor vehicle having a torque converter, which comprises at least a first component and a second component, which are arranged rotatably to each other and at least one of which is provided to transmit a provided by a prime mover power to drive wheels.

It is proposed that the first component and the second component at least partially form a centripetal pump, which is provided to supply a device provided for cooling equipment to a cooling system.

Under a "drive train device" in particular at least a part of all

Components are understood, which are provided in the motor vehicle to generate a power for a drive of the motor vehicle and to transfer to a road. By "intended" is intended in particular to be specially designed and / or

be understood equipped. The fact that an object is intended for a specific function should in particular mean that the object fulfills this specific function in at least one application and / or operating state and / or performs. Preferably, however, the first component and the second component completely form the centripetal pump. Alternatively or additionally, further components may form the centripetal pump. A "centripetal pump" is to be understood as meaning, in particular, a pump which is intended to convey the operating medium in a centripetal direction Preferably, the centripetal pump is provided for directing the operating medium to one in the direction of a center of the centripetal pump

to run extending spiral path. A "resource" is to be understood in particular a fluid which is suitable for a hydrodynamic

Torque transmission and / or cooling and / or lubrication is provided, in particular an oil. By means of the centripetal pump, the operating medium, in particular against a centrifugal force acting on this, in a

Zentripetalrichtung be promoted, whereby a pressure loss can be reduced and thereby a performance can be improved. This is particularly advantageous when the coolant flows through the torque converter against a conventional flow direction and / or an increased cooling capacity for cooling the torque converter is necessary, such as when starting and / or during acceleration. Thereby, a C0 ₂ emissions, in particular when starting and / or accelerating, a motor vehicle having the drive train device, reduced and fuel consumption can be reduced. Overall, therefore, an efficiency can be improved.

Advantageously, a construction can be simplified if at least the first component is intended to move the operating means in a circumferential direction. In this context, "moving" is to be understood in particular as meaning that the first component has a surface through which the operating medium is entrained relative to the second component during a rotational movement of the first component, for example due to an adhesive adhesion to the first component.

It is further proposed that at least the second component is provided to redirect the resource in a Zentripetalrichtung. As a result, can be dispensed with additional components and thus a component efficiency can be improved. By "deflecting in a centripetal direction" is to be understood, in particular, that the second component has at least one surface which is provided for deflecting the equipment entrained in the circumferential direction by the first component in the centripetal direction. Advantageously, a construction can be particularly simplified if the first component is designed as an impeller and the second component is designed as a stator. Alternatively, the first component may also be designed as a nrad and the third component as a pump.

Furthermore, it is proposed that the torque converter has as a third component a turbine wheel, in the vicinity of the resources in the

Torque converter occurs. As a result, a uniform cooling of all components of the torque converter can be achieved, whereby energy efficiency can be further improved. A "near zone" should in particular be understood as a spatial area which is formed, in particular, from points each having a minimum distance of at most 50 mm, advantageously at most 10 mm, preferably at most 5 mm, from the third component.

In one embodiment of the invention, it is proposed that the

Centripetalpumpe comprises at least one resource channel, which is at least partially formed by the second component. As a result, the centripetal pump can be structurally simply implemented in a torque converter and, in particular, integrated into already existing designs and concepts of torque converters and advantageously also be retrofitted. The resource channel is in particular between an inner radius of the second component, which for connection to a shaft

is provided and a mean radius of the second component, to which

Deflection vanes of the second component are arranged arranged. A "resource channel" is to be understood in particular an object which is intended to guide a resource, and a resource flow in

Direction of flow seen immediately on four sides, encloses. The second component forms at least three sides of the resource channel. However, it is also conceivable that the second component completely forms the resource channel, in which case in particular the second component forms four sides of the resource channel.

Particularly preferably, at least one side, in particular a fourth side, of the operating medium channel is formed by the first component. Advantageously, the

Zentripetalpumpe at least one further resource channel, in particular a plurality of other resource channels, which / which is at least substantially equivalent to the resource channel is / are. The resource channels are arranged rotationally symmetrical to each other and in such a way that they at least one to each other have two times, preferably a multiple and in particular a sevenfold rotational symmetry.

In a preferred embodiment of the invention it is proposed that the resource channel a resource input port and a

Equipment outlet opening comprises, which differ from each other

Input angle and output angle, wherein the input angle is smaller than the output angle. This allows a structurally simple deflection of the

Equipment can be achieved. In particular, an angle between a channel tangent and a circle tangent at the point of an "input angle" is intended

Resource input port of the resource channel are understood. An "initial angle" is to be understood as meaning, in particular, an angle between a channel tangent and a circular tangent at the point of a resource exit opening of the resource channel Here, in particular a tangent be understood, which only touches on the point of a circular path which passes through the point, wherein a radius of the circular path corresponds to the distance between a geometric center of the second component and the point.

In particular, the input angle can be at least 1 °, preferably at least 5 ° and particularly preferably at least 15 °, and the starting angle can be at most 90 °, preferably at most 80 ° and particularly preferably at most 70 °. It is particularly preferred that the input angle is at least 20 ° and the output angle is at most 90 °. As a result, a pumping action of the centripetal pump can be improved.

The operating medium channel, in particular in a plan view of the second component, has a curved contour. The contour is preferably bent in one direction and particularly preferably has no direction changes. Advantageously, the

Operating medium channel on a spiral contour. In order to achieve a uniform delivery, it is preferably proposed that the resource channel comprises a contour whose angular progression is linear. A "linear angle course" is to be understood in particular as meaning that, in particular in a plan view of the second component, the input angle and the output angle along a profile of the contour of the resource channel linearly merge into each other depending on a Amount of a radial vector whose origin lies in the geometric center of the second component and whose tip describes a profile of the contour of the resource channel. Preferably, the contour describes at least a portion of a circle involute, and more preferably a portion of an Archimedean spiral.

Furthermore, it is proposed that the resource channel perpendicular to

Resource flow cut has a width and a depth that are in a ratio of at least 3: 5 and at most 3.1 to each other. Preferably, the resource channel has a width of 6 mm and a minimum depth of 2 mm and a maximum of 10 mm. As a result, a flow rate can be increased and advantageously an operation of the centripetal pump can be improved.

It is also proposed that the centripetal pump comprises a total of seven equivalently designed operating medium ducts, in particular up to manufacturing tolerances and / or assembly tolerances, which are rotationally symmetrical to one another and in particular have a sevenfold rotational symmetry. As a result, a particularly uniform delivery by means of the centripetal pump can be achieved.

Further advantages will become apparent from the following description of the figures. In the figures 1 to 3 an embodiment of the invention is shown. Figures 1 to 3, the description of the figures and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Showing:

1 shows a motor vehicle with a drive train device,

Fig. 2 is a sectional view of a schematic representation of

Drive train device with a torque converter and Fig. 3 is a schematic plan view of a second component of

A power train assembly.

FIG. 1 shows a motor vehicle 44 with a drive train device. Furthermore, the motor vehicle 44 has a drive machine 14. The prime mover 14 can for be designed as a driving machine 14 known to a person skilled in the art,

for example, as a combustion drive, an electric drive, a natural gas drive, a fuel cell drive and / or a hybrid drive. The powertrain device transmits power provided by the prime mover 14 to drive wheels 16 of the motor vehicle 44. To transfer power, the powertrain device includes a torque converter 26.

FIG. 2 is a sectional view of a schematic representation of FIG

Powertrain device with the torque converter 26 shown. Of the

Torque converter 26 has a first component 10. The torque converter 26 has a second component 2. The first component 10 is designed as an impeller. The second component 12 is designed as a stator. Furthermore, the

Torque converter 26, a third component 28. The third component 28 is formed as a turbine wheel. The first, second and third components 10, 12, 28 are provided for a hydrodynamic torque transmission. The first component 10 has a plurality of blades which are provided to detect and accelerate a resource, such as an oil in particular. The first component 10 is intended to be non-rotatably connected to an output shaft of a drive machine 14, not shown here. For transmission of the torque provided by the engine 14, the first component 10 converts one of the engine 14

provided mechanical energy in flow energy. The first component 10 forms a primary side of the torque converter 26.

The third component 28 is intended to receive the flow energy provided by the first component 10 and to provide it as mechanical energy. The third component 28 is intended to be connected to a non-illustrated transmission input shaft of the torque converter 26 downstream transmission. The third component 28 forms a secondary side of the torque converter 26.

The torque converter 26 includes a freewheel 48. The freewheel 48 is provided to support the second component 12 fixed to the housing. If the first component 10 has a higher rotational speed than the second component 12, the first component 10 generates a flow of operating medium, which is deflected at the third component 28 and at the second component 12. A torque acting on the second component 12 is directed in a blocking direction of the freewheel 48. The second component 12 is thereby arranged fixed to the housing. Due to the twice-diverted operating medium current acts on the third component 28, a torque which may be greater than that of the engine 14th provided torque. If the first component 10 and the third component 28 have the same or a similar rotational speed, the torque converter 26 acts as

hydrodynamic coupling. The second component 12 is entrained by a resource flow. A torque acting on the second component 12 is directed along a freewheeling direction of the freewheel 48. The second component 12 rotates.

In addition, the torque converter 26 may include a lock-up clutch 50 that is provided to mechanically interconnect the first component 10 and the third component 28. Furthermore, the torque converter 26 has a

Vibration damper 52, for example in the form of a dual-mass flywheel, which is intended to occur in an operation of the prime mover 14

Dampen torsional vibrations.

The torque converter 26 may be highly heated in an operating condition, particularly at the onset of torque transmission. To counteract overheating, the powertrain device has a cooling system. The cooling system is intended for temperature exchange between the equipment and an environment. The cooling system is at a temperature exchange between the

Equipment and an environment provided. The cooling system has a heat exchanger not shown here, which is provided for a person skilled in the art, which is provided to a heat energy dissipated by the operating means to a

Environment or on another coolant, such as a cooling water to give. To connect the torque converter 26, the cooling system has a resource inlet 54 and a resource outlet 56.

The first component 10 and the second component 12 at least partially form one

Centripetal pump 18 off. Alternatively or additionally, the third and the second, and in particular the first component could at least partially form a centripetal pump. The operating fluid outlet 56 is connected to the centripetal pump 18. In order to supply the operating medium to the cooling system by means of the centripetal pump 18, the operating medium is moved by the first component 10 in a circumferential direction 22. If the second component 12 moves at a lower rotational speed than the first component 10 and / or the second component 12 is blocked by the freewheel 48, the second component 12 deflects the operating medium into a centripetal direction 24. The cooling system may have a further pump not shown here. The other pump delivers the resources within the cooling system 20. The other pump is of the

Centripetal pump 18 designed differently. However, it is also conceivable that the Zentripetalpumpe 18 is provided as the sole pump for a promotion of the equipment in the cooling system.

In a vicinity 30 of the third component 28, the resource in the

Torque converter 26 promoted. The proximity region 30 is a spatial region, which is formed, in particular, from points each having a distance of at most 50 mm from the third component 28. For this purpose, the operating medium inlet 54 has an outlet opening 58 which is at least partially bounded by the third component 28. The resource inlet 54 leads to the vicinity 30 of the third component 28 of the torque converter 26. The torque converter 26 and the cooling system form a cooling circuit. It is conceivable that the centripetal pump can also perform a function of a centrifugal pump, depending on the direction of an operating medium flow within the cooling circuit.

The centripetal pump 18 has at least one resource channel 32. Of the

Operating medium channel 32 is partially formed by the second component 12. Of the

Resource channel may alternatively or additionally be formed by the first component. The second component 12 has at least one groove 62. The groove 62 at least partially forms the resource channel 32. The groove 62 has three sides which enclose the resource stream. Furthermore, the first component 10 forms the

Operating medium channel 32 partially off. The first component 10 covers the groove 62 of the second component 12 and thus encloses the resource flow from a fourth side. In the present case, therefore, form the second and the first component 10, 12 the

Operating medium channel 32 completely off. Alternatively or additionally, the

Operating medium channel also be formed only by the second component. It is also conceivable that the second and the third component together form the resource channel.

The fluid channel 32 has a width of 6 mm, cut perpendicular to the fluid flow. Furthermore, the resource channel 32 perpendicular to

Operating fluid cut, a minimum depth of 2 mm and a maximum of 10 mm. The width and the depth are thus in a ratio of at least 3: 5 and at most 3: 1 to each other. Preferably, an extension of the resource channel along the contour of the resource channel at least 2 times, in particular at least 5 times and advantageously at least 10 times as large as the width of the resource channel. The second component 12 has an inner radius 64. An extent of the inner radius 64 in the present case is 20.75 mm. At the inner radius 64, the second component 12 is supported on the freewheel 48. Furthermore, the second component 12 has a central radius 66. An extension of the central radius 66 is 60.5 mm. The second component 12 also has an outer radius 68. An extent of the outer radius 68 is 94 mm in the present case. The inner radius is in particular between 1% and 50%, preferably between 10% and 40% and particularly preferably between 20% and 30% of the outer radius of the second component. The central radius is in particular between 40% and 90%, preferably between 50% and 80% and particularly preferably between 60% and 70% of the outer radius of the second component.

The second component 12 has deflection vanes (not shown here) known to a person skilled in the art, which are provided to divert a resource flow for the purpose of converting a torque. The deflecting vanes are arranged at the central radius 66 and extend to the outer radius 68. The working medium channel 32 is arranged between the inner radius 64 and the central radius 66 of the second component 12.

The centripetal pump 18 has further operating medium ducts, which, in particular with the exception of manufacturing and / or assembly tolerances, are designed to be equivalent to the operating medium duct 32. In the present case, the centripetal pump 18 has six further operating fluid channels. Overall, the centripetal pump 18 has a total of seven resource channels 32. For clarity, here is only the

Resource channel 32 provided with a reference numeral. The resource channels 32 are arranged so that they have a seven-fold rotational symmetry to each other.

The resource channel 32 has a resource input port 34 and a

Equipment outlet opening 36 on. An entrance angle 38 of the

Equipment input port 34 is different from an output angle 40 of the resource exit port 36. Entry angle 38 is 20 ° in the present case. The output angle 40 is 60 ° in the present case. In a plan view, the resource channel 32 between the resource input port 34 and the resource output port 36 has a contour 42 bent in one direction. The contour 42 is free of changes in direction. The angular course of the contour 42 is linear. The resource channel 32 has a spiral contour. Preferably, the contour of the resource channel describes at least a portion of a Circular involute and most preferably a section of an Archimedean spiral.

Alternatively or in addition to the above embodiment, however, it is also conceivable that the drive train device, in particular instead of the torque converter comprises a friction disk clutch. The friction disk clutch then has the first and the second component. Preferably, the first component could be formed as an inner disk of the Reiblamellenkupplung and the second component as an outer disk.

LIST OF REFERENCE NUMBERS

first component

second component

prime mover

drive wheels

centripetal

circumferentially

centripetal

torque converter

third component

close range

Resources channel

Resources entrance opening

Utilities output port

entry angle

exit angle

contour

motor vehicle

freewheel

Uberbrückungskupplung

vibration

Betriebsmittellzulauf

Resources flow

outlet opening

groove

inner radius

Middle radius

outer radius

Claims

claims

Drive train device for a motor vehicle (44),

with at least one torque converter (26) having at least a first component (10) and a second component (12), which are arranged rotatably to each other and of which at least one is provided, provided by a drive machine (14) power to drive wheels (16) to transfer

characterized in that

the first component (10) and the second component (12) at least partially form a centripetal pump (18) which is provided to supply a cooling means provided for cooling equipment (20).

Drive train device according to claim 1

characterized in that

at least the first component (10) is provided to move the operating means in a circumferential direction (22).

Drive train device according to one of claims 1 or 2

characterized in that

at least the second component (12) is provided to redirect the operating medium in a centripetal direction (24).

4. Powertrain device according to one of the preceding claims

characterized in that

the first component (10) is designed as an impeller and the second component (12) is designed as a stator.

5. Powertrain device according to one of the preceding claims

characterized in that

the torque converter (26) as the third component (28) has a turbine wheel, in the vicinity of which (30) the operating medium enters the torque converter (26).

6. Drive train device according to one of the preceding claims

characterized in that

the centripetal pump (18) has at least one operating medium channel (32) which is at least partially formed by the second component (12).

7. Powertrain device according to claim 6

characterized in that

the resource channel (32) includes a resource input port (34) and a resource output port (36) having different input angles (38) and output angles (40) from each other, wherein

Input angle (38) is smaller than the output angle (40).

8. Drive train device according to claim 7

characterized in that

the input angle is at least 20 ° and the output angle is maximum 60 °.

9. Drive train device according to claim 6

characterized in that

the operating medium channel (32) comprises a contour (42) whose angular progression is linear.

10. Drive train device according to claim 6

characterized in that

the resource channel (32), cut perpendicular to a resource flow, has a width and a depth that are in a ratio of at least 3: 5 and at most 3: 1 to each other.

11. Driveline device according to claim 6,

characterized in that

the Zentripetalpumpe comprises a total of seven equivalent to each other formed resource channels (32), which are arranged rotationally symmetrical to each other.