WO2015021981A1 - Fluid assembly - Google Patents
Fluid assembly Download PDFInfo
- Publication number
- WO2015021981A1 WO2015021981A1 PCT/DE2014/200383 DE2014200383W WO2015021981A1 WO 2015021981 A1 WO2015021981 A1 WO 2015021981A1 DE 2014200383 W DE2014200383 W DE 2014200383W WO 2015021981 A1 WO2015021981 A1 WO 2015021981A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fluid
- clutch
- fluidic
- arrangement according
- machine
- Prior art date
Links
Classifications
-
- 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
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0021—Generation or control of line pressure
- F16H61/0025—Supply of control fluid; Pumps therefore
-
- 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
- F16D48/00—External control of clutches
- F16D48/02—Control by fluid pressure
- F16D48/0206—Control by fluid pressure in a system with a plurality of fluid-actuated clutches
-
- 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
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0206—Layout of electro-hydraulic control circuits, e.g. arrangement of valves
-
- 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
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/68—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for stepped gearings
- F16H61/684—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for stepped gearings without interruption of drive
- F16H61/688—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for stepped gearings without interruption of drive with two inputs, e.g. selection of one of two torque-flow paths by clutches
-
- 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
- F16D48/00—External control of clutches
- F16D48/02—Control by fluid pressure
- F16D2048/0227—Source of pressure producing the clutch engagement or disengagement action within a circuit; Means for initiating command action in power assisted devices
- F16D2048/0233—Source of pressure producing the clutch engagement or disengagement action within a circuit; Means for initiating command action in power assisted devices by rotary pump actuation
- F16D2048/0236—Source of pressure producing the clutch engagement or disengagement action within a circuit; Means for initiating command action in power assisted devices by rotary pump actuation with multiple independent pumps, e.g. one per clutch, or for supplying fluid to different systems
- F16D2048/0242—Two or more rotating pumps driven together by the same power source, e.g. connected by a shaft, or a single pump having two or more fluid outputs
-
- 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
- F16D48/00—External control of clutches
- F16D48/02—Control by fluid pressure
- F16D2048/0227—Source of pressure producing the clutch engagement or disengagement action within a circuit; Means for initiating command action in power assisted devices
- F16D2048/0233—Source of pressure producing the clutch engagement or disengagement action within a circuit; Means for initiating command action in power assisted devices by rotary pump actuation
- F16D2048/0245—Electrically driven rotary pumps
- F16D2048/0248—Reversible rotary pumps, i.e. pumps that can be rotated in the two directions
-
- 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
- F16D48/00—External control of clutches
- F16D48/02—Control by fluid pressure
- F16D2048/0257—Hydraulic circuit layouts, i.e. details of hydraulic circuit elements or the arrangement thereof
- F16D2048/0263—Passive valves between pressure source and actuating cylinder, e.g. check valves or throttle valves
-
- 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
- F16D48/00—External control of clutches
- F16D48/02—Control by fluid pressure
- F16D2048/0257—Hydraulic circuit layouts, i.e. details of hydraulic circuit elements or the arrangement thereof
- F16D2048/0266—Actively controlled valves between pressure source and actuation cylinder
-
- 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
- F16D48/00—External control of clutches
- F16D48/02—Control by fluid pressure
- F16D2048/0257—Hydraulic circuit layouts, i.e. details of hydraulic circuit elements or the arrangement thereof
- F16D2048/0275—Two valves arranged in parallel, e.g. one for coarse and the other for fine control during supplying or draining fluid from the actuation cylinder
-
- 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
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/30—Signal inputs
- F16D2500/302—Signal inputs from the actuator
- F16D2500/3024—Pressure
Definitions
- the invention relates to a fluid arrangement for fluidly actuating a multiple clutch, with a first clutch actuation device for actuating a first clutch and with a second clutch actuation device for actuating a second clutch, and with a fluidic energy source.
- a hydraulic arrangement for controlling a dual-clutch transmission of a motor vehicle which comprises: a hydraulic energy source for supplying the hydraulic system by means of a hydraulic medium with hydraulic energy; a pressure accumulator for storing the hydraulic energy; a clutch cooling for cooling clutches of the dual-clutch transmission by means of the hydraulic medium; Clutch actuators for actuating a first clutch and a second clutch, wherein the hydraulic power source comprises a double-flow electric pump.
- the object of the invention is to simplify the operation of multiple couplings.
- the object is achieved with a fluid arrangement for fluidly actuating a multiple clutch, with a first clutch actuating device for actuating a first clutch and with a second clutch actuating device for actuating a second clutch, and with a fluidic energy source, in that the fluidic energy source is a fluid machine with opposite fluid flow directions comprises, which is fluidically connected via a valve logic with the clutch actuation devices, that both clutches are actuated by the one fluid machine.
- the fluid arrangement is preferably a hydraulic arrangement which is operated with a hydraulic medium, such as hydraulic oil or brake fluid.
- the clutch actuation devices are, for example, hydraulic clutch slave cylinders, which comprise a clutch slave piston, which is specifically pressurized with hydraulic pressure to actuate the clutches.
- the clutch actuators are also referred to as clutch actuators.
- Conventional electromechanical or hydrostatic dual-clutch actuators usually require a separate drive per clutch, for example an electric motor.
- Other so-called power pack arrangements require a high design effort.
- the fluid arrangement according to the invention comprises only a single fluid machine, which can be driven by an electric motor, for example.
- the associated valve logic can advantageously be made relatively simple.
- the fluid machine is advantageously designed as a displacement machine, for example as a vane machine, as a gear machine or as a piston machine.
- a preferred embodiment of the fluid arrangement is characterized in that the fluid machine is designed so that it can build up a flow rate in opposite directions of flow against a load pressure.
- the fluid machine can be operated as a pump or as a motor. The operation in opposite directions is also referred to as reversing.
- valve logic comprises Nachsaugventile and overflow valves.
- the valve logic advantageously comprises only two Nachsaugventile and two overflow valves, which are associated with a fluid container.
- the Nachsaugventile together with the fluid container to represent a Nachsaugfunktion.
- the overflow valves are used in combination with the fluid container to represent an overflow function.
- a further preferred exemplary embodiment of the fluid arrangement is characterized in that the fluid machine is connected by a first fluidic path to the first clutch actuating device and by a second fluidic path to the second clutch actuating device.
- the first fluidic path includes, for example, a first fluid line connected to a first fluid port of the fluid machine.
- the second fluidic path includes, for example, a second fluid line connected to a second fluid port of the fluid machine.
- a further preferred embodiment of the fluid arrangement is characterized in that the two fluidic paths are each assigned a coupling valve.
- the coupling valve is designed, for example, as a 2/2-way valve with an open position and a closed position.
- the clutch valve is also used as a clutch inlet or coupling lungsablaufventil referred.
- the clutch valve is listed, for example, as a poppet or spool valve.
- a further preferred exemplary embodiment of the fluid arrangement is characterized in that a fluid pressure accumulator is assigned to each of the two fluidic paths.
- the fluid pressure accumulator is advantageously arranged between the clutch valve and the clutch actuating device.
- Another preferred exemplary embodiment of the fluid arrangement is characterized in that a pressure sensor is assigned to each of the two fluidic paths. As a result, the pressure in the fluidic routes can be detected in a simple manner.
- a further preferred embodiment of the fluid arrangement is characterized in that the two fluidic routes are connected by a Nachsaugventil raised and a Kochströmventil raised with a fluid container.
- the Nachsaugventil interests and the spill valve preferably comprise two valves and are used to represent a Nachsaugfunktion and overflow function.
- the valves can be designed as active or passive valves in poppet design or in slide valve design.
- a further preferred embodiment of the fluid arrangement is characterized in that the Nachsaugventil boots / spill valve means comprises two Nachsaugventi- le / overflow valves which open away from the fluid container / to the fluid container. In the opposite directions close the valves.
- the valves can each be designed (independently) as passive or active valves.
- a further preferred embodiment of the fluid arrangement is characterized in that the fluid machine is driven by an electric motor and / or designed as a fluid motor and / or fluid pump.
- the fluid machine is preferably designed as a 4-quadrant-capable hydraulic machine, in particular reversing pump or reversible motor.
- the fluid machine is preferably driven by an electric drive machine, for example an electric motor.
- the electric drive machine is advantageously reversible, that is operable in opposite directions of rotation, and optionally also allows a generator operation. If appropriate, the invention also relates to a method for actuating a multiple clutch with the aid of a previously described fluid arrangement.
- FIG. 1 shows a fluid circuit diagram of a fluid arrangement according to the invention
- FIG. 3 shows the fluid arrangement of Figure 1 in a by a dashed arrow
- FIG. 1 shows a fluid arrangement 1 with a first clutch actuating device 4 and a second clutch actuating device 5.
- the first clutch actuating device 4 serves to actuate a first clutch (not shown) and is assigned to a first fluidic path 8.
- the second clutch actuating device 5 serves to actuate a (not shown) second clutch and is associated with a second fluidic path 9.
- the fluid assembly 1 is preferably operated with a hydraulic medium, such as hydraulic oil, and therefore also referred to as a hydraulic arrangement 1.
- the fluidic lines 8, 9 are referred to as hydraulic lines.
- Fluid assembly 1 only a single fluidic power source 10 in the form of a fluid machine 12.
- the fluid machine 12 is also referred to as a hydraulic machine and is driven by an electric motor 14.
- the first hydraulic section 8 comprises a hydraulic line, which connects the first clutch actuating device 4 to a first connection of the fluid machine or hydraulic machine 12.
- the second hydraulic path 9 comprises a second hydraulic line, which is the second clutch actuating device 5 with a second connection of the hydraulic machine or fluid machine 12 connects.
- the fluid assembly 1 comprises a relatively simple valve logic 15 with a Nachsaugventileinnchtung 16 and a spill valve means 17.
- the Nachsaugventileinnchtung 16 and the spill valve 17 may be combined with a Fluidbehalter 20, for example, containing a hydraulic medium such as hydraulic oil. Therefore, the fluid container 20 is also referred to as a hydraulic container.
- the two hydraulic sections 8, 9 are fluidly connected to each other by a Nachsaug Gustav 21 and a parallel arranged overflow line 22.
- the fluid container 20 is connected both to the secondary suction line 21 and to the overflow line 22.
- the Nachsaugventi- le 24, 25 are shown in simplified form as check valves, which close to the fluid container 20 out. From the fluid container 20 open the Nachsaugventile 24, 25 depending on the pressure.
- overflow valves 26, 27 are arranged in the overflow 22 in the overflow 22.
- the overflow valves 26, 27 are shown in simplified form as check valves.
- the overflow valves 26, 27 open towards the fluid container 20. From the fluid container away close the overflow valves 26, 27th
- the valve logic 15 with the Nachsaugventileinnchtung 16 and the spill valve 17 is preceded by two coupling valves 31, 32.
- the clutch valve 31 is connected in the first fluidic path 8 between the valve logic 15 and the first clutch actuator 4.
- the second clutch valve 32 is connected in the second fluidic path 9 between the valve logic 15 and the second clutch actuator 5.
- a fluid pressure accumulator 33 is connected in the first fluidic path 8 between the clutch valve 31 and the first clutch actuator 4.
- a second fluid pressure accumulator 34 is connected in the second fluidic path 9 between the clutch valve 32 and the second clutch actuator 5.
- a pressure sensor 35 is arranged at an upper end of the first fluidic path 8 in FIG. 1.
- a pressure sensor 36 is arranged at an upper end of the second fluidic path 9 in FIG. 1.
- the fluid machine 12 is designed as a reversing pump, with the two particularly advantageous both clutch actuators 4, 5 are actuated. The reversing pump can build up a flow in both directions unrestricted against a load pressure.
- the Nachsaugventile 24, 25 and the spill valves 26, 27 in a simple manner allow a balanced volume flow balance.
- a dashed arrow 41 indicates that the fluid arrangement 1 according to the invention enables load compensation operation.
- part of the fluidic energy stored in the first fluidic path 8 can be transferred into the second fluidic path 9 via the fluid machine 12, which is designed as a reversing pump. It is advantageous that the recorded drive power can be reduced by a so-called feed pressure at the inlet of the fluid machine 12.
- a dashed arrow 42 indicates an overflow operation of the fluid arrangement 1.
- the overflow operation 42 is necessary, for example, when the first fluidic path 8 has to deliver more volume than the second fluidic path 9 currently required via the fluid machine 12.
- hydraulic medium passes from the first fluidic path 8 via the overflow valve 26 into the fluid container 20.
- a Nachsaug congress the fluid assembly 1 is indicated by an arrow 43.
- the Nachsaug réelle 43 is necessary, for example, when the first clutch, which is associated with the first clutch actuator 4, via the fluid machine 12 must accommodate more volume than the second clutch, which is associated with the second clutch actuator 5, currently deliver.
- fluid in particular hydraulic medium, passes from the fluid container 20 via the suction valve 24 and the fluid machine 12 into the second fluidic path 9.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112014003738.9T DE112014003738A5 (en) | 2013-08-14 | 2014-08-06 | fluid arrangement |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013216170 | 2013-08-14 | ||
DE102013216170.0 | 2013-08-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015021981A1 true WO2015021981A1 (en) | 2015-02-19 |
Family
ID=51483186
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2014/200383 WO2015021981A1 (en) | 2013-08-14 | 2014-08-06 | Fluid assembly |
Country Status (2)
Country | Link |
---|---|
DE (2) | DE112014003738A5 (en) |
WO (1) | WO2015021981A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016127994A1 (en) * | 2015-02-12 | 2016-08-18 | Schaeffler Technologies AG & Co. KG | Fluid arrangement |
DE102018102246B3 (en) | 2018-02-01 | 2019-03-07 | Schaeffler Technologies AG & Co. KG | Actuation system and method for actuating two partial clutches of an electrically driven axle |
WO2023182976A1 (en) * | 2022-03-22 | 2023-09-28 | PT Tech, LLC | Adaptive platform for hydraulic clutches |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015009671A1 (en) * | 2015-07-25 | 2017-01-26 | Borgwarner Inc. | Hydraulic control device for driving a dual clutch and multiple clutch device with such a control device |
DE102016216264B4 (en) | 2016-08-30 | 2024-08-22 | Schaeffler Technologies AG & Co. KG | Fluid arrangement and method for actuating vehicle components and drive train for a motor vehicle |
DE102020111492A1 (en) | 2020-04-28 | 2021-10-28 | Schaeffler Technologies AG & Co. KG | Hydraulic arrangement |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1236918A1 (en) * | 2001-02-22 | 2002-09-04 | ZF Sachs AG | Clutch system with a pump actuated clutch |
WO2006002450A1 (en) * | 2004-06-30 | 2006-01-12 | Magna Drivetrain Ag & Co Kg | Hydraulic system for controlling two clutches of a transmission |
DE102008009653A1 (en) | 2007-03-07 | 2008-09-11 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Hydraulic arrangement for controlling a dual-clutch transmission of a motor vehicle |
DE102010047801A1 (en) | 2009-10-29 | 2011-05-05 | Schaeffler Technologies Gmbh & Co. Kg | Hydrostataktor |
DE102011102277A1 (en) * | 2011-05-23 | 2012-11-29 | Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg | Clutch assembly and powertrain for a motor vehicle |
-
2014
- 2014-08-06 DE DE112014003738.9T patent/DE112014003738A5/en not_active Withdrawn
- 2014-08-06 WO PCT/DE2014/200383 patent/WO2015021981A1/en active Application Filing
- 2014-08-06 DE DE102014215516.9A patent/DE102014215516A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1236918A1 (en) * | 2001-02-22 | 2002-09-04 | ZF Sachs AG | Clutch system with a pump actuated clutch |
WO2006002450A1 (en) * | 2004-06-30 | 2006-01-12 | Magna Drivetrain Ag & Co Kg | Hydraulic system for controlling two clutches of a transmission |
DE102008009653A1 (en) | 2007-03-07 | 2008-09-11 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Hydraulic arrangement for controlling a dual-clutch transmission of a motor vehicle |
DE102010047801A1 (en) | 2009-10-29 | 2011-05-05 | Schaeffler Technologies Gmbh & Co. Kg | Hydrostataktor |
DE102011102277A1 (en) * | 2011-05-23 | 2012-11-29 | Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg | Clutch assembly and powertrain for a motor vehicle |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016127994A1 (en) * | 2015-02-12 | 2016-08-18 | Schaeffler Technologies AG & Co. KG | Fluid arrangement |
US10408285B2 (en) | 2015-02-12 | 2019-09-10 | Schaeffler Technologies Ag & Co. Kg. | Fluid arrangement |
DE102018102246B3 (en) | 2018-02-01 | 2019-03-07 | Schaeffler Technologies AG & Co. KG | Actuation system and method for actuating two partial clutches of an electrically driven axle |
WO2023182976A1 (en) * | 2022-03-22 | 2023-09-28 | PT Tech, LLC | Adaptive platform for hydraulic clutches |
Also Published As
Publication number | Publication date |
---|---|
DE102014215516A1 (en) | 2015-02-19 |
DE112014003738A5 (en) | 2016-05-19 |
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