WO2008006709A1 - Lamellenbremse in einem automatgetriebe mit steuerbarer kühlölversorgung und verfahren zum betreiben derselben - Google Patents
Lamellenbremse in einem automatgetriebe mit steuerbarer kühlölversorgung und verfahren zum betreiben derselben Download PDFInfo
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- WO2008006709A1 WO2008006709A1 PCT/EP2007/056537 EP2007056537W WO2008006709A1 WO 2008006709 A1 WO2008006709 A1 WO 2008006709A1 EP 2007056537 W EP2007056537 W EP 2007056537W WO 2008006709 A1 WO2008006709 A1 WO 2008006709A1
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- Prior art keywords
- disc brake
- piston
- cooling oil
- housing
- radially
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/78—Features relating to cooling
- F16D65/84—Features relating to cooling for disc brakes
- F16D65/853—Features relating to cooling for disc brakes with closed cooling system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/78—Features relating to cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/78—Features relating to cooling
- F16D2065/783—Features relating to cooling cooling control or adjustment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/78—Features relating to cooling
- F16D2065/787—Pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0467—Elements of gearings to be lubricated, cooled or heated
- F16H57/0473—Friction devices, e.g. clutches or brakes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0467—Elements of gearings to be lubricated, cooled or heated
- F16H57/0479—Gears or bearings on planet carriers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0482—Gearings with gears having orbital motion
- F16H57/0484—Gearings with gears having orbital motion with variable gear ratio or for reversing rotary motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/3023—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by fluid pressure
- F16H63/3026—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by fluid pressure comprising friction clutches or brakes
Definitions
- the invention relates to a multi-disc brake in an automatic transmission with controllable cooling oil supply and a method for operating the same according to the preamble of patent claim 1 and patent claim 42.
- Such disc brakes are known per se and are used for example as starting or shifting elements in automatic transmissions for motor vehicles.
- Wet-running multi-plate clutches are usually supplied from radially inside to radially outward with a cooling oil as thrown by the rotational movement of the input side or the output side of the clutch this cooling oil radially outward and thus a conveying effect for the heated in the clutch cooling oil is achieved.
- this radial promotion of the cooling oil is not or only very badly possible, since when closing the brake a rotating brake nbautei I is brought against a stationary brake component with energy absorption to a standstill.
- Such multi-disc brakes are therefore either operated completely submerged in the cooling oil, or supplied via a pressure gradient specifically from the outside with cooling oil,
- cooling oil can be guided from radially inward to radially outward, that is to say in the direction of the transmission housing.
- passage openings can be formed on the outside of the outer disc carrier of the multi-disc brake, through which the cooling oil within the disc packet is guided radially outward and from there into a cooling oil sump.
- the described too low heat removal from the multi-disc brake leads to damage to the cooling oil, which then can no longer perceive its lubricating function in other areas of the automobiles to the desired extent. Although such damage to the cooling oil or lubricating oil could be avoided by longer time intervals between two starting operations, this represents an unacceptable operational restriction for a motor vehicle operation.
- the cooling oil can be supplied from the outside of the fins under a certain static pressure of the multi-disc brake in another technical solution, seen radially.
- the multi-disc brake must be axially sealed in such a way that the cooling oil under the pressure mentioned is for the most part pressed radially through the disk pack.
- the seal can be done on the one hand by the pressed on the disk set piston of the multi-disc brake hydraulic brake actuator and on the other hand by a support disk at the other end of the disk pack, the latter being supported on the transmission housing after the end of a slipping operation phase of the multi-disc brake and / or a subsequent Nachkühlphase the cooling oil passage then be switched off with the multi-disc brake open.
- the cooling oil in the automatic transmission of radially inward from other transmission parts such as a gear set, a radially inner multi-disc brake and / or a multi-plate clutch is supplied at the in the gear housing radially outwardly disposed multi-disc brake, as this is axially sealed as described, This acts on the fins a comparatively high drag torque, which ultimately unacceptably increase the fuel consumption of such a vehicle equipped and can reduce its maximum speed.
- a conventional wet-running multi-plate clutch is known from DE 41 35 040 C1, in which the cooling oil supply of the clutch plates takes place from radially inward to radially outward.
- radial openings are formed in an inner disk carrier in the region below the friction linings of the clutch disks, through which the cooling oil is specifically directed to the same.
- a wet-running multi-disc clutch or multi-disc brake in which the cooling oil flow through the disk pack formed by the clutch pack according to a first embodiment from radially inward to radially outward or in a second embodiment from radially outward to radially inward he follows.
- the cooling oil flow is maintained by a defined pressure difference between the location of the cooling oil inlet and the location of the cooling oil outlet in the disk set.
- the clutch or brake disk space is sealed by a support of the last outer plate on the gear housing and in the actuated case via the voltage applied to the other end plate piston by a metallic touching the components or by means of separate elastomer seals.
- US Pat. No. 6,202,814 B1 discloses a multi-disc brake in an automatic transmission, in which a cooling oil can be guided from outside to inside via a ring channel formed radially above the disk pack, wherein the cooling oil supply can be controlled via a separate valve.
- the invention has the object of providing a wet-running multi-disc brake in an automatic transmission of the type mentioned in such a way that it is better than previously supplied with a cooling oil. Especially should the means for cooling oil supply to the multi-disc brake be able to dissipate heat to the desired extent via a cooling oil flow during slipping operation or when the multi-disc brake is closed, and minimize the mentioned drag torque losses when the multi-disc brake is open. Another object is to provide a method of operating such a multi-disc brake.
- the invention is based on the finding that the described technical problems can be solved if the cooling oil passage through the multi-disc brake, depending on the operating state, takes place from radially outside to radially inside or from radially inside to radially outside.
- the cooling oil in the transmission housing is guided from radially inward to radially outward and / or via the same and then discharged into the cooling oil sump, while in the slip mode or when the multi-disk brake is closed, the cooling oil passes radially inward from the outside through the multi-disc brake becomes.
- the space around the multi-disc brake is preferably largely sealed against an axial cooling oil outlet in order to favor the flow guidance.
- the changeover of the flow direction of the cooling oil takes place via suitable means which release or close a radial opening in the outer disk carrier of the multi-plate clutch depending on the operating situation.
- the invention relates to a multi-disc brake in an automatic transmission, with an inner disc carrier and an outer disc carrier, with on the disk carriers axially alternately arranged inner disks and outer disks, with friction linings on the inner and / or outer disks, with a piston of a pressure medium actuated piston-cylinder assembly by means of which the inner disks and outer disks are acted upon by a slat brake closing force, and with a piston-distal end plate or support plate, which forms an axial abutment for the disk set constructed by the lamella, wherein the multi-disc brake and / or the surrounding components are formed so that the fins are wetted with a cooling oil.
- the multi-disc brake is designed such that the cooling oil in dependence on the operating state of the same in radially different directions and / or through the plate pack is conductive.
- cooling oil supply through and / or over the fins of the multi-disc brake advantageously allows in the open state on the one hand a large drag torque avoiding discharge of cooling oil, which flows from other transmission components in the direction of the multi-disc brake, and in closed or slipping operated multi-disc brake one Under static pressuredeölzu- drive from radially outward to radially inwardly through this disk brake to allow in this operating condition without or with only little dynamic promotion of cooling oil in the disk brake sufficient dissipation of heat from the same. It is judged to be particularly advantageous that this multi-disc brake can be actively supplied with cooling oil even when the rotatable blades are at a standstill in an aftercooling phase.
- a piston-side end plate is arranged on one of the two disk carrier between the piston of the piston-cylinder assembly and the piston-near inner disk or outer disk.
- the multi-disc brake it is provided that it is largely sealed in the axial direction against a leakage of cooling oil.
- the axial sealing of the multi-disc brake is realized via separate sealing means on the piston and / or the piston-side end plate and / or the piston-near inner disk or outer disk and / or the end plate remote from the piston and / or on a support plate remote from the piston.
- the axial sealing of the multi-disc brake can, however, also be implemented via sealingly formed metallic surfaces on the piston and / or the piston-side end plate and / or the piston-near inner disk or outer disk and / or the piston-distal end disk and / or on the piston-remote support disk.
- Another feature provides with regard to the cooling oil guide that the outer disk carrier in the region of the disk pack has one or more radial openings through which the cooling oil feedable to the disk pack or can be derived from this.
- the at least one radial opening in the outer disk carrier preferably opens into an annular space, which is formed at least at one axial end of the disk set between the piston and the piston-side end plate and / or between the end plate and the support plate. From there, the cooling oil passes to the brake plates, at least partially radial grooves in the Have friction lining of each inner plate and / or outer plate, through which the cooling oil from the inflow-side radial end to the downstream end radial end of the fins of the disk set can flow.
- the at least one groove in the friction lining is radially rectilinear or radially curved, whereby different delivery characteristics and residence times of the cooling oil in Lammelenb can be achieved.
- the inner disk carrier has radial openings for the inflow or outflow of cooling oil from or into the disk pack.
- an entrainment toothing on the outer plate carrier for the forwarding of the cooling oil from the annular space to the lamellae has, in sections, at least one missing tooth or one tooth space in the entrainment profile.
- this cooling oil in the opened state of the multi-disc brake from the inside to the outside radially through the same is conductive.
- the information from radially inside and radially outside refer to the axial means of the automatic transmission, in the housing-near area, the multi-disc brake is preferably arranged.
- the outer disk carrier is rotatably connected to the transmission housing or even a part of the same.
- the cooling oil in the open state of the multi-disc brake of the same can be supplied by other transmission components.
- These may be, for example, the gears of a first and / or a second wheelset and / or a radially inner arranged disc brake or multi-plate clutch of the automatic bevel.
- cooling oil can be conducted through the latter from the radially outside to the radially inward when the multi-disc brake is closed and / or when the multi-disc brake is slipping. This takes place under a static pressure and non-dynamic pressure, since with closed multi-disc brake no rotation of the rotatable brake discs which permits the emergence of a dynamic cooling oil pressure at the multi-disc brake takes place
- the supply of cooling oil takes place in these operating situations by a separate ⁇ lzu réellestoff formed, for example, as a valve or as a radially inferior to the multi-disc brake component.
- the oil supply means is designed as a rotary valve, in which a controllable, rotatable component shuts off or opens at least one oil passage opening with regard to a cooling oil passage
- this oil feed means is designed as a radially displaceable feed tube, which is designed to be radially displaceable by a control pressure closing the multi-disc brake or bringing it into the slip mode.
- this control pressure is also the piston of the multi-disc brake actuated piston Cylinder arrangement in the automatic transmission controlled by a related electro-hydraulic control device,
- the feed tube has a seal at its end facing the outer disk carrier, or that a seal encompassing the opening is arranged on the radially outer side of the outer disk carrier.
- this seal may be an O-ring received in an associated annular groove.
- the oil supply means designed as a feed pipe or as a hydraulic switching valve is preferably integrated into the genuinely electro-hydraulic control device for the automatic transmission or arranged thereon.
- the switching valve may have a separate housing in which a piston loaded by a spring is arranged axially displaceable, and in which the piston can release and close a transfer bore for the cooling oil to said radial opening in the outer disk carrier, the supply of the cooling oil in the switching valve takes place via an inlet bore in the housing thereof.
- the switching valve preferably has a drain hole through which cooling oil, for example, from the valve housing can be derived when the disk brake is operated open, and should be directed via this cooling oil in the direction of a cooling oil sump.
- the housing of the switching valve may be formed integrally with the transmission housing or integrally with the housing of the hydraulic control unit or be present separately. For advantageous production of an integrated in the transmission housing switching valve housing this is arranged transversely to the transmission main axis, ie transversely to the longitudinal axis of the transmission housing with respect to its control valve axis. If the switching valve housing is formed as a separate housing, an arrangement thereof in the transmission housing is preferred in which the control valve axis is aligned parallel to the transmission main axis. In addition, it can be provided that the control valve axis is aligned obliquely, ie at an angle not equal to 90 ° to the transmission main axis
- a further feature concerning the switching valve housing is that the housing has as ventilation means for the valve spring receiving spring chamber an axial vent hole on the spring-near end face of the housing or a radial vent slot, the latter may be formed separately or as a long drainage hole for the cooling oil in the switching valve housing ,
- the switching valve for the radial conversion of the cooling oil flow and / or through the brake disk pack but also be designed so that it can be switched by a separate control pressure, which depends directly or indirectly on the control pressure with which the piston of Bremslamellenaktuators is activated to close the multi-disc brake.
- a switching valve has in concrete construction a valve housing with a control pressure bore for supplying the control pressure, a control pressure chamber for receiving the control pressure medium, an inlet bore for the cooling oil, a drain hole for the cooling oil and a transfer hole for the cooling oil.
- a first, standing in flow communication with the opening in the outer disk carrier transfer port opening or closing piston and provided by the control pressure medium second control piston is provided, the two pistons are axially connected to each other via a piston rod and acted upon by a spring with an axial force.
- a hydraulic switching valve which has a hollow cylindrical housing which is fixed radially below the radial opening in the outer disk carrier such that the inner circumferential surface of the housing surrounds the opening in the outer disk carrier, wherein in the housing in a longitudinal section preferably pot-shaped piston is received axially displaceable with a bottom hole. and in which lateral openings are formed in the housing, which can be opened or closed depending on the position of the piston through its side wall.
- the piston in this control valve can also be formed closed-cylindrical.
- the housing of this hydraulic switching valve is used with its one axial end in a radial recess in the gear housing and / or in the outer side of the outer disk carrier, and arranged with its other end on the housing of the hydraulic transmission control unit.
- At least one sealing means for sealing the cylinder space between the housing of the hydraulic shift valve and the housing of the hydraulic transmission control unit is arranged. This structural measure ensures optimum transfer of the cooling oil without leakage and allows clearance compensation when installing the control valve between the transmission housing and the control unit.
- the hydraulic switching valve is in particular constructed such that when a supply of cooling oil in the cylinder chamber from radially outside to radially inside the piston in the direction towards the outer disk carrier in the housing is sealingly displaceable, and that at a supply of cooling oil in the cylinder chamber from radially inside to radially outside of the piston is movable in the opposite direction, which releases the side openings in the housing of the switching valve.
- the lateral openings in the housing releasing movement of the piston is effected by a supply of cooling oil from radially inside to radially outward into the piston and / or by the restoring force of a spring, which at one end on the piston or the bottom of the pot Supported piston and other ends on the radial outer side of the outer disk carrier or the gear housing.
- the invention also relates to a method for operating a multi-disc brake according to the invention.
- This method provides that the cooling oil, depending on the operating state of the lamellar brake is passed in radially different directions through and / or over the disk set.
- the flow direction of the cooling oil through and / or over the disk set of the multi-disc brake is set by the actuation of an oil supply means, which is actuated by a hydraulic pressure difference.
- This pressure difference which actuates the oil supply means, can be generated by a differential pressure generated in the cooling oil flow, or be a static hydraulic pressure of a pressure medium with which the piston of the brake disk actuator is also actuated. At least the pressure depends on the operation of the Preferably, the oil supply means is actuated by a hydraulic pressure with which the piston of the brake actuator is actuated in the closing direction.
- this piston is directly or indirectly connected via at least one other component with the ⁇ lzu Switzerlandstoffus, or an associated valve means.
- the pressure of the cooling oil and thus the cooling oil flow can also be adjusted depending on the current thermal power loss of the multi-disc brake. This power loss is calculated from the rotational speed of the rotatable brake component and the piston pressure of the brake piston.
- the oil supply means is actuated by a hydraulic pressure, which generates independently of the operating pressure for the piston of the multi-disc brake in the already mentioned GEgen hydraulic control device for the brake disk actuator and / or the electro-hydraulic transmission control device becomes.
- an oil supply means designed as an electromagnetic switching valve is actuated by an electrical control pulse of a control device, and thus the inflow of cooling oil from radially outside to radially inside or the cooling oil outflow from radially inside to radially outside through the disk set of the multi-disc brake allows
- the description is accompanied by a drawing guide examples. he shows
- Fig. 1 is a schematic longitudinal section through an automatic transmission with a multi-disc brake according to the invention with a radially alternate cooling oil guide by a radially extendableméölzuWORKstoff.
- FIG. 1 in the opened state with a cooling oil flow from radially inward to radially outward
- FIG. 5 shows a multi-disc brake according to the invention with a control valve as cooling oil supply means in the slip mode or in the closed state with a cooling oil flow from radially outside to radially inside,
- FIG. 5 shows the multi-disk brake according to FIG. 5 in the open state with a cooling oil flow from radially inward to radially outward
- FIG. 10 shows the hydraulic control valve according to FIG. 9 in an operating situation in which cooling oil is conducted from radially inward to radially outward
- Fig. 11 is a detailed longitudinal section through the cylinder housing of the hydraulic control valve according to Figures 9 and 10, as well as
- FIG. 12 shows a cross section through the cylinder housing in a sectional plane AA according to FIG. 11.
- Fig. 1 shows a multi-disc brake 1 according to a first embodiment of the invention.
- This multi-disc brake 1 is designed as a switching element of a partially illustrated automatic transmission and initially comprises, in a manner known per se, an inner plate 3 supporting inner plate carrier 4, which is connected to a rotatable component of the automatic transmission.
- the multi-disc brake 1 comprises an outer disk 5 bearing outer disk carrier 6, which is rotatably connected to the housing 12 of the Automatge ⁇ rie-.
- the inner disk 3 and the outer disk 5 are alternately arranged axially next to each other and form together with two end plates 8 and 9 and a support plate 11 a disk set 14.
- the one end plate 8 is a piston 10 of a pressure medium actuated piston-cylinder arrangement with a multi-disc brake.
- the inner disk 3 and the outer disk 5 are each equipped with a friction lining 7, wherein the friction linings are arranged pointing in each case in the same axial direction.
- a first wheel set 17 is located radially inside and a second wheel set 18 of the automatic transmission is located to the right.
- a conventional multi-disc brake 2 is arranged.
- the end plate 8 can be formed both as a flat blade or as a spring blade (wave spring). In an embodiment of the end plate as a spring blade this is designed with respect to their rigidity so that it is flat or almost flat pressed in closed or slipping operated multi-disc brake. However, it is also a design possible in which no end plate 8 is present, so that the piston 10 presses directly on the last piston-near outer plate 5.
- the cooling oil 13 passes into said annular space 16 at the end of the disk set 14 remote from the piston, from where it can flow through the outer disk carrier ⁇ through the radial opening 16. Since the feed tube 19 is located in this position in its rest position away from the outer disk carrier ⁇ the cooling oil then flows with oil streams 30 to said cooling oil sump. A small volumetric flow of the cooling oil passes through the strut lamella 11 on its side remote from the piston, and from there reaches the cooling oil sump. This is also shown in FIG.
- the oil supply means on the multi-disc brake 1 is designed as a hydraulic switching valve 43. This allows depending on its control or, from the current operating situation of the multi-disc brake 1 and the automatic transmission, a cooling oil flow in opposite radial directions through the plate pack 14 and around this.
- the switching valve 43 has a housing 31 in the interior of which a piston 32 is arranged to be axially displaceable.
- the piston 32 is acted upon at one end by a spring 33 with a spring force, while the axially opposite end face with the cooling oil in Kotakt for cooling the multi-disc brake 1 during the slip operation or in the closed state of the same, cooling oil 13 is under a sufficiently high static pressure supplied to the switching valve 43 via an inlet bore 45 in the valve housing 31, so that the piston 32 of the switching valve 43 in FIG
- This transfer hole 44 is in fluid communication with the already mentioned opening 16 in the outer plate carrier 6, so that through this the switched cooling oil 13 into the annular space 15 at the Slat package 14 passes. From there it flows.
- Fig. 6 shows that operating situation in which the multi-disc brake 1 is opened, and flows in the cooling oil in cooling oil streams 29 from the conventional multi-disc brake 2 and the two sets of wheels 17 and 18 in the transmission housing from radially inward to radially outward in the direction of the multi-disc brake 1 according to the invention.
- the switching valve 43 no cooling oil is supplied to the inlet bore 45, so that the valve piston 32 is displaced by the force of the spring 33 in the figure to the right.
- Characterized the transfer hole 44 and the drain hole 46 are opened in the valve housing 31, so that the cooling oil through the disk set 14 of the multi-disc brake 1, the transfer hole 44 and the drain hole 46 can flow through the switching valve 43 in a cooling oil flow 35 to the cooling oil sump,
- valve housing 36 or 40 is formed as a separate valve housing or integral part of the transmission housing.
- the valve axis is preferably aligned transversely to the transmission main axis, whereby the processing in the transmission production is facilitated in a transfer line. If the valve Housing 36 and 40 is formed separately, an arrangement thereof is preferably parallel to the transmission main axis
- Fig. 7 also illustrates that the valve housing 36 may have an axial vent hole 37, by means of which the spring chamber 47 can be vented in the switching valve 38 at an axial displacement of the valve piston 32 or vented.
- the same purpose is a radially outwardly formed in the valve housing 36 venting or ventilation slot 38.
- the drain hole 46 in the switching valve housing 40 may be axially stretched so long that they can also perform the said ventilation function for the spring chamber 47 ,
- Fig. 7 also shows that in the region of the far side of the piston support plate 11, an elastomeric element 48 is used as a seal in an annular groove in a housing-fixed component, by means of which the multi-disc brake is axially sealable
- the switching valve 39 on the multi-disc brake 1 according to the invention according to FIG. 8 differs from the switching valve 43 of the previous figures in that it is not actuated by the static pressure of a cooling oil 13, but that a separate switching valve control pressure 54 is used for valve actuation ,
- This control pressure 54 is preferably directly or at least indirectly dependent on that control pressure with which the piston 10 of the hydraulic Bremslamellenakfuators is actuated or actuated.
- the switching valve 39 according to the variant shown in Fig. 8 is preferably part of an elektra-hydraulic transmission control unit. It is arranged in this embodiment, on the one hand on the radially inner side of the transmission control unit and on the other hand with the radially
- the valve housing 40 has a control pressure bore 49 for supplying the control pressure means 54 under control pressure, which thus enters a control pressure chamber 50.
- the valve housing 40 has an inlet bore 45, a drain hole 46 and a transfer hole 44 for the cooling oil 13.
- valve housing 40 a first, the transfer hole 44 opening or closing control piston 51, and one of the control pressure medium 54 pressurizable second control piston 52nd arranged, wherein the two pistons 51, 52 via a piston rod 53 axia! interconnected and acted upon by a spring 33 with an axial force.
- cooling oil 13 can be conducted from the other, radially inner multi-disc brake 2 or the two gear sets 17 and 18 from radially inward to radially outward through the disk set 14 and the switching valve 39 to the cooling oil sump.
- Another cooling oil flow can, as has already been described in detail above, be guided past the disk pack 14 past the gear housing from radially inward to radially outward to the cooling oil sump.
- this multi-disc brake has inner disks and outer disks which, together with end and support disks 8, 11, form a disk set 14.
- This plate pack 14 is largely sealed against an axial cooling oil outlet and acted upon by the piston 10 of the brake actuator, not shown with a closing the multi-disc brake 1 actuation force.
- the cooling oil 13 should also flow through this substantially from radially inward to radially outward or from radially outward to radially inward in dependence on different operating situations of this multi-disc brake 1.
- cooling oil should be performed from radially outside to radially inward by the disk set 14.
- the multi-disc brake according to FIGS. 9 and 10 has a hydraulic switching valve 55 with a hollow-cylindrical housing 56 which is fixed radially below the opening 16 in the outer disk carrier 6 on this or on the radial outer side of the gear housing 12 , that the inner circumferential surface of the valve housing 56 sealingly surrounds this opening 16.
- the hollow-cylindrical housing 56 of the hydraulic switching valve 55 with its one axial end in a radial recess 61 in the transmission housing 12 is sealingly inserted, and is arranged or attached with its other end on the housing of the hydraulic transmission control unit 22
- a longitudinally cup-shaped piston 58 is received axially displaceable, which has a bottom hole 59 in the piston head, through the cooling oil 13 is conductive.
- the pot-shaped piston 58 is also inserted into the hollow-cylindrical housing 56 in such a way that its piston crown is arranged far away from the inner disk carrier 6
- a spring 57 is inserted, which is designed here as a helical compression spring, this spring 57 is supported at one end on the bottom of the pot 58 and the other end on the radial outer side of the outer disk carrier 6 and the gear housing 12
- a sealing means 62 is used in a innenlamellenfrägerfernen frontal annular groove 41 of the housing 56 so that no cooling oil 13 between the housing 56 of the hydraulic switching valve 55 and the housing of the hydraulic transmission control unit 22 can escape axially.
- this sealant 62 designed, for example, as an O-ring, can be used for counterbalance compensation when the hydraulic control valve 55 is installed between the transmission housing 12 and the control unit 22. The operation of this hydraulic switching valve 55 will be described below.
- the hydraulic switching valve 55 is supplied with cooling oil 13, for example from the hydraulic control device 22, from radially outside to radially inside. Therefore, this cooling oil 13 passes first into the cylinder chamber 63. Since the cooling oil 13 is supplied under a static pressure, the cup-shaped piston 58 is displaced against the restoring force of the spring 57 in the direction of the disk set 14. As a result, the piston 58 closes the side openings 60 in the hollow-cylindrical valve housing 56.
- FIG. 10 illustrates that operating situation in which the multi-disc brake 1 is open and there is a differential rotational speed between the rotatable and the stationary multi-disk brake component.
- cooling oil 13 is to be conducted via a cooling oil flow 29 from radially inward to radially outward through the disk set 14.
- the hydraulic switching valve 55 with the multi-disc brake 1 is opened, no cooling oil 13 is supplied under static pressure from radially outside to radially inside. Therefore, here is the pot-shaped is supplied. Therefore, here the piston-shaped piston 58 is located inside the valve housing 56 in its undeflected rest position, in which it is held by the force of the spring 57. Characterized the lateral openings 60 are released in the valve housing 56, so that cooling oil 13 coming from the flow-through brake plates in cooling oil streams 30 first enter the valve housing 56 and then exit through the lateral openings 60 in the direction of the cooling oil sump.
- a multi-disc brake according to the invention in a hybrid transmission can also be used as a switching element.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
- Mechanical Operated Clutches (AREA)
- General Details Of Gearings (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT07765721T ATE453816T1 (de) | 2006-07-10 | 2007-06-29 | Lamellenbremse in einem automatgetriebe mit steuerbarer kühlölversorgung und verfahren zum betreiben derselben |
KR1020087021989A KR101384867B1 (ko) | 2006-07-10 | 2007-06-29 | 제어식 냉각유 공급장치를 구비한 자동변속기 내의 다판 브레이크 및 그 작동 방법 |
EP07765721A EP2038564B1 (de) | 2006-07-10 | 2007-06-29 | Lamellenbremse in einem automatgetriebe mit steuerbarer kühlölversorgung und verfahren zum betreiben derselben |
CN2007800155424A CN101443574B (zh) | 2006-07-10 | 2007-06-29 | 具有可控冷却油供给的自动变速器上的片式制动器和用于其运行的方法 |
JP2009518829A JP5498785B2 (ja) | 2006-07-10 | 2007-06-29 | 制御可能な冷却油供給を備える自動変速装置の多板ブレーキとその多板ブレーキを作動する方法 |
DE502007002496T DE502007002496D1 (de) | 2006-07-10 | 2007-06-29 | Lamellenbremse in einem automatgetriebe mit steuerbarer kühlölversorgung und verfahren zum betreiben derselben |
US12/306,974 US8087506B2 (en) | 2006-07-10 | 2007-06-29 | Multiple-disk brake in an automatic transmission having controllable cooling oil supply and method for operating the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006031787.4 | 2006-07-10 | ||
DE102006031787A DE102006031787A1 (de) | 2006-07-10 | 2006-07-10 | Lamellenbremse in einem Automatgetriebe mit steuerbarer Kühlölversorgung und Verfahren zum Betreiben derselben |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008006709A1 true WO2008006709A1 (de) | 2008-01-17 |
Family
ID=37887163
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2007/056537 WO2008006709A1 (de) | 2006-07-10 | 2007-06-29 | Lamellenbremse in einem automatgetriebe mit steuerbarer kühlölversorgung und verfahren zum betreiben derselben |
Country Status (8)
Country | Link |
---|---|
US (1) | US8087506B2 (de) |
EP (1) | EP2038564B1 (de) |
JP (1) | JP5498785B2 (de) |
KR (1) | KR101384867B1 (de) |
CN (1) | CN101443574B (de) |
AT (1) | ATE453816T1 (de) |
DE (2) | DE102006031787A1 (de) |
WO (1) | WO2008006709A1 (de) |
Cited By (1)
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WO2011018701A1 (en) * | 2009-08-14 | 2011-02-17 | Valtra Oy Ab | Oil cooled brake |
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DE102008000482A1 (de) | 2008-03-03 | 2009-09-10 | Zf Friedrichshafen Ag | Ölgekühltes Reibschaltelement |
DE102008032757B4 (de) * | 2008-07-11 | 2016-03-03 | Audi Ag | Verfahren zur Unterdrückung von Getriebegeräuschen |
JP5227772B2 (ja) * | 2008-12-16 | 2013-07-03 | 株式会社小松製作所 | ブレーキ装置の潤滑装置およびその制御方法 |
DE102009002108A1 (de) * | 2009-04-01 | 2010-10-14 | Zf Friedrichshafen Ag | Verfahren zur Steuerung einer Standabkopplungsfunktion |
DE102010002934A1 (de) * | 2010-03-17 | 2011-09-22 | Zf Friedrichshafen Ag | Lamellenschaltelement |
DE102010003894A1 (de) | 2010-04-13 | 2011-10-13 | Elringklinger Ag | Kupplungskolbeneinheit |
DE102010039171A1 (de) | 2010-08-11 | 2012-02-16 | Zf Friedrichshafen Ag | Kupplung mit schaltbarer Kühlung sowie Verfahren zur Steuerung dieser Kupplung |
US8627737B2 (en) * | 2011-03-16 | 2014-01-14 | Caterpillar Inc. | Spur gear final drive with integrated brakes |
DE102011086378B3 (de) * | 2011-11-15 | 2013-02-28 | Zf Friedrichshafen Ag | Ölversorgungssystem |
DE102011086376B4 (de) | 2011-11-15 | 2015-05-07 | Zf Friedrichshafen Ag | Ölzufuhrvorrichtung für eine Lamellenbremse |
DE102012112379A1 (de) * | 2012-12-17 | 2014-06-18 | Linde Material Handling Gmbh | Antriebsachse mit zumindest einem elektrischen Fahrmotor |
US9046139B2 (en) | 2012-12-21 | 2015-06-02 | Caterpillar Inc. | Clutch cooling system |
JP6131796B2 (ja) * | 2013-09-13 | 2017-05-24 | アイシン・エィ・ダブリュ株式会社 | 動力伝達装置 |
CN103498882B (zh) * | 2013-10-22 | 2016-05-04 | 中国北方车辆研究所 | 一种自动变速器用制动器 |
JP6350441B2 (ja) * | 2014-10-30 | 2018-07-04 | マツダ株式会社 | 変速機のブレーキ装置 |
US9850962B2 (en) * | 2015-01-06 | 2017-12-26 | Borgwarner Inc. | Rotary coupling for an all-wheel drive vehicle |
DE102015216198A1 (de) | 2015-08-25 | 2017-03-02 | Zf Friedrichshafen Ag | Vorrichtung zum Öffnen und Verschließen eines Kühlöl-Auslasses eines Automatikgetriebes |
JP6398922B2 (ja) * | 2015-09-04 | 2018-10-03 | マツダ株式会社 | 自動変速機 |
JP6387931B2 (ja) | 2015-09-04 | 2018-09-12 | マツダ株式会社 | 自動変速機 |
US10041549B2 (en) * | 2016-01-18 | 2018-08-07 | Deere & Company | Disk pack cooling arrangement |
EP3248823B1 (de) * | 2016-05-24 | 2018-08-01 | C.R.F. Società Consortile per Azioni | Kraftfahrzeugantriebsstrangeinheit mit einem system zur kühlung einer kupplungsvorrichtung |
KR101927174B1 (ko) * | 2016-11-01 | 2018-12-10 | 현대자동차 주식회사 | 변속기용 전자 브레이크 장치 |
JP6525024B2 (ja) * | 2017-05-24 | 2019-06-05 | マツダ株式会社 | 変速機のブレーキ装置 |
CN107575559B (zh) * | 2017-10-13 | 2024-03-15 | 中国第一汽车股份有限公司 | 湿式三离合器冷却油路 |
US11181184B2 (en) * | 2018-10-02 | 2021-11-23 | Deere & Company | Drive assembly with passive pump lubrication |
DE102019118699A1 (de) | 2019-07-10 | 2021-01-14 | Schaeffler Technologies AG & Co. KG | Betätigungsvorrichtung für eine Lamellenbremse sowie Getriebeanordnung mit der Betätigungsvorrichtung und der Lamellenbremse |
DE102022205056A1 (de) | 2022-05-20 | 2023-11-23 | Zf Friedrichshafen Ag | Reibschlüssiges Schaltelement zum Abbremsen eines Rades eines Fahrzeuges und Steuergerät zum Betätigen eines reibschlüssigen Schaltelementes |
DE102022207023A1 (de) | 2022-07-11 | 2024-01-11 | Zf Friedrichshafen Ag | Nasslaufende Lamellenbremse, elektrisch angetriebenes Fahrzeug, Verfahren zur Kontrolle eines Ölzustands und Computerprogramm |
DE102022207022A1 (de) | 2022-07-11 | 2024-01-11 | Zf Friedrichshafen Ag | Nasslaufende Lamellenbremse für ein elektrisch angetriebenes Fahrzeug und Verfahren zur Steuerung und Regelung der Kühlölversorgung einer nasslaufenden Lamellenbremse eines elektrisch angetriebenen Fahrzeuges |
CN117329244B (zh) * | 2023-12-01 | 2024-02-02 | 山西强力矿用设备制造有限公司 | 液压湿式制动集成结构 |
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DE4136040C1 (en) | 1991-11-01 | 1993-01-07 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | Epicyclic gear drive with disc clutch or brake - has oil guide flange between planetary gear front ends and drive path, dividing two annular chambers |
US6202814B1 (en) | 1999-08-24 | 2001-03-20 | Borgwarner Inc. | Automatic transmission having grounded clutch with convergent cooling |
DE10230183A1 (de) | 2002-07-05 | 2004-01-22 | Zf Friedrichshafen Ag | Verfahren zur Kühlfluidzuführung für Lamellenkupplungen und -bremsen in Automatgetrieben und Einrichtung zur Kühlfluidzuführung |
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JPS5853926U (ja) * | 1981-10-09 | 1983-04-12 | 株式会社稲坂歯車製作所 | クラツチ板への自動給油装置 |
JPH0314325U (de) * | 1989-06-27 | 1991-02-13 | ||
DE4447455A1 (de) * | 1994-12-13 | 1996-06-20 | Joachim Kreisl | Einrichtung für den Ölrücklauf von Naßlaufkupplungen und -bremsen |
US6189669B1 (en) * | 1999-08-24 | 2001-02-20 | Borgwarner Inc. | Multi-disk friction device having forced lubrication on demand |
US7308977B2 (en) | 2005-05-25 | 2007-12-18 | Gm Global Technology Operations, Inc. | Clutch assembly and method of reversing cooling fluid flow |
-
2006
- 2006-07-10 DE DE102006031787A patent/DE102006031787A1/de not_active Withdrawn
-
2007
- 2007-06-29 EP EP07765721A patent/EP2038564B1/de not_active Not-in-force
- 2007-06-29 US US12/306,974 patent/US8087506B2/en not_active Expired - Fee Related
- 2007-06-29 CN CN2007800155424A patent/CN101443574B/zh not_active Expired - Fee Related
- 2007-06-29 WO PCT/EP2007/056537 patent/WO2008006709A1/de active Application Filing
- 2007-06-29 DE DE502007002496T patent/DE502007002496D1/de active Active
- 2007-06-29 JP JP2009518829A patent/JP5498785B2/ja not_active Expired - Fee Related
- 2007-06-29 AT AT07765721T patent/ATE453816T1/de active
- 2007-06-29 KR KR1020087021989A patent/KR101384867B1/ko not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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DE4136040C1 (en) | 1991-11-01 | 1993-01-07 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | Epicyclic gear drive with disc clutch or brake - has oil guide flange between planetary gear front ends and drive path, dividing two annular chambers |
US6202814B1 (en) | 1999-08-24 | 2001-03-20 | Borgwarner Inc. | Automatic transmission having grounded clutch with convergent cooling |
DE10230183A1 (de) | 2002-07-05 | 2004-01-22 | Zf Friedrichshafen Ag | Verfahren zur Kühlfluidzuführung für Lamellenkupplungen und -bremsen in Automatgetrieben und Einrichtung zur Kühlfluidzuführung |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011018701A1 (en) * | 2009-08-14 | 2011-02-17 | Valtra Oy Ab | Oil cooled brake |
Also Published As
Publication number | Publication date |
---|---|
EP2038564B1 (de) | 2009-12-30 |
DE502007002496D1 (de) | 2010-02-11 |
KR20090030249A (ko) | 2009-03-24 |
KR101384867B1 (ko) | 2014-04-15 |
US20090308709A1 (en) | 2009-12-17 |
EP2038564A1 (de) | 2009-03-25 |
CN101443574A (zh) | 2009-05-27 |
US8087506B2 (en) | 2012-01-03 |
JP5498785B2 (ja) | 2014-05-21 |
JP2009543001A (ja) | 2009-12-03 |
ATE453816T1 (de) | 2010-01-15 |
DE102006031787A1 (de) | 2007-04-12 |
CN101443574B (zh) | 2012-01-11 |
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