• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    SUMMARY Arrangements for cooling gear oil comprising: a cooling device (41) for cooling the gear oil by heat exchange with a cooling medium, an oil pump (43) for generating a flow of gear oil through the cooling device, and an electronic control device (44) for controlling the pump power at the oil pump. Depending on the temperature of the transmission oil, the oil pump is controlled according to a number of different selectable control states, which include: a first control state, in which the oil pump is kept shut off or operated with minimal pump power, a second control state, in which the oil pump is operated with a pump power corresponding to a variable drilling value, and a third control condition, in which the oil pump is operated with a high pump power which provides an oil flow for maximum cooling of the gear oil in the cooling device. The invention also relates to a motor vehicle comprising such an arrangement and a method for controlling such an arrangement.
    公开号:SE1450104A1
    申请号:SE1450104
    申请日:2014-01-31
    公开日:2015-08-01
    发明作者:Ola Hall；Johannes Andersen
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    The invention also relates to a method having the features defined in claim 11 for controlling an arrangement for cooling gearbox oil of a gearbox which is arranged to transfer torque from a drive motor to a drive shaft.
    Other advantageous features of the process according to the invention appear from the following description.
    The invention also relates to a computer program having the features defined in claim 12, a computer program product having the features defined in claim 13 and an electronic control unit having the features defined in claim 14.
    BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in more detail below with the aid of exemplary embodiments, with reference to the accompanying drawings.
    It is shown in: Fig. 1 a principle sketch of an arrangement according to an first embodiment of the present invention, Fig. 2 a principle sketch of an arrangement according to a second embodiment of the invention, Fig. 3 a principle sketch of an arrangement according to a third embodiment of the invention, Fig. 4 a principle sketch of a an arrangement according to a fourth embodiment of the invention, Fig. a principle sketch of an arrangement according to a fifth embodiment of the invention, Fig. 6 a principle sketch of an electronic control unit for implementing a method according to the invention, Fig. 7 a flow diagram illustrating a method according to an embodiment of the invention, Fig. 8 is a river diagram illustrating a method according to an alternative embodiment of the invention, and Fig. 9 is a river diagram illustrating a method according to another alternative embodiment of the invention.
    DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION Fig. 1 very schematically illustrates a motor vehicle 1 with a set of drive wheels 2, a set of non-driven wheels 3, a gearbox 4, a drive shaft 5 for transmitting torque between the gearbox and a drive motor 4 and the drive motor 6 for driving the drive wheels. The drive motor 6 can, for example, be an internal combustion engine or an electric motor. Torque is conventionally transferable from the drive motor 6 to the drive wheels 2 via the gearbox 4 and the drive shaft 5 for propelling the motor vehicle 1. By means of a coupling device 7 an output shaft 8 of the drive motor 6 can be brought into force-transmitting connection with and disconnected from an input shaft 9 at the wax barn 4.
    The gearbox 4 is provided with various components 10, such as bearings and gears, which need to be lubricated and cooled during operation when one or more shafts of the gearbox rotate. An oil sump 11 for receiving gearbox oil is arranged at the bottom of the gearbox 4. The oil sump 11 is connected via an oil line 12 to oil channels 13 in the gearbox to allow gearbox oil to be fed from the oil sump 11 to said oil channels 13 for lubrication and cooling of said components 10 in the gear shaft 4. After its passage through the oil channels 13, the gear oil runs back down into the oil sump 11.
    The drive motor 6 is controlled by means of an electronic motor control unit 14, which is arranged, among other things, to regulate the speed of the drive motor.
    The illustrated motor vehicle 1 further comprises a cooling system 20 with a cooling circuit 21 for cooling the drive motor 6 by means of a cooling liquid flowing in the cooling circuit, preferably in the form of water with any freezing point reducing additives such as glycol. A cooling water pump 22 in the form of a rotor-type displacement pump is connected in the cooling circuit 21 for circulating the cooling water in the cooling circuit. Furthermore, a cooler 23, for example in the form of a conventional cooling water cooler, is connected in the cooling circuit 21 for cooling said cooling water. This cooler 23 comprises a cooling water inlet 24a which is connected to a cooling water outlet 25b of the drive motor 6 via a first line 26 of the cooling circuit and a cooling water outlet 24b which is connected to a cooling water inlet 11 25a of the drive motor 6 via a second line 27 of the cooling circuit. In the illustrated example, the coolant pump 22 is arranged in the second line 27. The first line 26 is connected to the second line 27 via a third line 28 of the cooling circuit.
    This third line 28 is arranged to allow coolant to be returned from the drive motor coolant outlet 25b to the drive motor coolant inlet 25a without the coolant passing through said cooler 23. Between the coolant inlet 25a and the coolant outlet 25b of the drive motor 6 the cooling motor can be circulated. absorption of heat from the drive motor. A thermostat 29 is arranged at the connection point between the first line 26 and the third line 28. Depending on the temperature of the cooling liquid, the thermostat 29 directs the cooling liquid flowing out of the drive motor 6 to the cooler 23 to be cooled in it before the cooling liquid is returned to the drive motor 6 or directly back. to the drive motor 6 via the third line 28 without passage through the cooler 23. An accumulator tank 30 is conventionally connected to the cooling circuit 21 to accommodate temperature-dependent volume changes of the cooling liquid.
    The coolant flowing through the radiator 23 is cooled by air which is blown by the speed wind towards the radiator when the motor vehicle 1 is in motion. The illustrated cooling system 20 also comprises a flap 31 which is arranged to generate a supplementary air flow through the cooler 23 if necessary. This flap 31 can be connected to the internal combustion engine 6 to be driven by it when needed when the speed wind is too low to thus providing a sufficient air flow through the cooler 23 with respect to the required cooling of the coolant.
    The motor vehicle 1 comprises an arrangement 40 for cooling the gearbox oil of the gearbox 4. This arrangement 40 comprises a cooling device 41 for cooling the gearload oil by heat exchange with a cooling medium flowing through the cooling device 41. In the embodiment illustrated in Fig. 1, the cooling device 41 is connected to the cooling circuit 21 and arranged to flow through the cooling liquid circulating in the cooling circuit, the cooling device 41 being designed as a heat exchanger which is fed on its primary side with the gear oil to be cooled. with the said cooling water. In this case, the said cooling medium thus consists of cooling water.
    An oil line 42 is connected to the oil sump 11 in the gearbox 4 and to the cooling device 41 to allow the gear oil to be fed via the oil line 42 from the oil sump 11, through the cooling device 41 for cooling therein and then back to the gearbox 4 where the gear oil flows back into the oil sump 11 An oil pump 43 in the form of a rotor-type displacement pump is provided in the oil line 42 for generating a flow of gear oil through it. The pumping power of the oil pump 43 is controlled by means of an electronic control device 44.
    The electronic control device 44 is arranged to, depending on the radiating temperature of the gear oil, control the oil pump 43 according to any of a plurality of selectable control states, these control states comprising at least: a first control state, in which the electronic control device 44 is arranged to bring the oil pump 43 to be kept off or to be operated with minimal pump power, a second control state, in which the electronic control device 44 is arranged to cause the oil pump 43 to be operated with a pump power corresponding to a variable drilling value, the electronic control device 44 being arranged to determine this variable depending on the value of the radiating flow and the radiating temperature of the coolant flowing through the cooling device 41 and the radiating temperature of the gear oil, and a third control state in which the electronic control device 44 is arranged to cause the oil pump 43 to be operated with a hog pumpeffe kt which provides an oil flow for maximum cooling of the gear oil in the cooling device 41.
    The electronic control device 44 is arranged to receive the food value regarding the radiating temperature of the gear oil from a temperature sensor 45 which is arranged to supply the temperature of the gear oil. This temperature sensor 45 can for instance be arranged to supply the temperature of the gear oil in the oil sump 11, as illustrated in Fig. 1.
    The electronic control device 44 is arranged to receive the food value regarding the radiating temperature of the refrigerant from a temperature sensor 46 which is arranged to supply the temperature of the refrigerant. This temperature sensor 46 may, for example, be arranged to supply the temperature of the coolant in a conduit portion of the cooling circuit 21 between the cooling water pump 22 and the cooling device 41, as illustrated in Fig. 1. In the embodiment illustrated in Fig. 1, the flow of the cooling medium flowing through the cooling device 41 of the speed of the coolant pump 22. In the case where the coolant pump 22 is conventionally driven by the drive motor 6, for example via a drive belt, the speed of the coolant pump 22 depends on the speed of the drive motor 6. In this case, the electronic control device 44 may be arranged to receive information regarding the speed of the drive motor from the motor control unit 14 and to determine the radiating flow of the cooling medium flowing through the cooling device 41 based on this speed information.
    In the embodiment illustrated in Fig. 1, the arrangement 40 comprises an electric motor 47 for driving the oil pump 43, the electronic control device 44 being arranged to control the pump power of the oil pump 43 by controlling the speed of the electric motor 47.
    The motor vehicle 1 may comprise a separate oil pump 15 for feeding gearbox oil from the oil sump 11 to the above-mentioned oil channels 13 in the gearbox 4, as illustrated in Fig. 1. This oil pump 15 may for example be connected to a rotating shaft 16 in the gearbox 4 to driven by this. This shaft 16 is a shaft which is arranged to always rotate when the input shaft and / or output shaft of the gearbox rotates and may for instance be a side shaft or main shaft of the gearbox 4. In this case it may thus be for the lubrication and cooling of the components 10 in the gearbox 4 required for the flow of gearbox oil through said oil channels 13 is maintained 5N / n when the oil pump 43 is switched off and the electronic control device 44 can consequently be arranged to keep this oil pump 43 switched off in the above-mentioned first control state.
    In the embodiment illustrated in Fig. 2, the cooling device 41 is connected to the above-mentioned oil channels 13 in the gearbox 4, the oil pump 43 being responsible for the supply of gearbox oil to these oil channels. Thus, in this case, the flow of gearbox oil required for the lubrication and cooling of the components 10 in the gearbox 4 through said oil channels 13 can not be maintained when the oil pump 43 is switched off and the electronic control device 44 must consequently be arranged to drive the oil pump 43 in all control conditions, but with greatly reduced pump power in the first control condition. The embodiment according to Fig. 2 otherwise corresponds to the embodiment according to Fig. 1.
    The embodiment illustrated in Fig. 3 corresponds to the embodiment illustrated in Fig. 2, except that the oil pump 43 'in this case is a variable displacement pump which is connected to and arranged to be driven by a rotating shaft 16 in the gearbox 4 This shaft 16 is a shaft which is arranged to always rotate when the input shaft and / or output shaft of the gearbox rotates and may be, for example, a side shaft or main shaft of the gearbox 4. The displacement of the oil pump 43 'is controlled in itself by means of a maneuvering device 48, the electronic control device 44 being arranged to control the pumping power of the oil pump 43 'by controlling the displacement of the oil pump via the maneuvering device 48. The embodiment illustrated in Fig. 4 corresponds to the embodiment illustrated in Fig. 2, except that in this case the oil pump 43 is arranged to be driven by a rotating shaft 16 in the gearbox 4 via a viscous coupling 49 with adjustable engagement degree, the electronic control device 44 being arranged to control the pumping power of the oil pump 43 by controlling in itself the degree of engagement of the viscous coupling 49. Said shaft 16 is a shaft which is arranged to always rotate when the input shaft and / or output shaft of the gearbox rotates and may be, for example, a side shaft or main shaft at the gearbox 4. At the viscous coupling 49 torque and power are transmitted by means of oil in narrow gaps between a first coupling part which is connected to the rotating shaft 16 of the gearbox 4 and a second coupling part which is connected to an input shaft of the oil pump 43. By varying the amount of oil in the space between the two coupling parts, the degree of engagement of the viscous cup can 49 and thereby the torque and speed exceeded by the viscous clutch are varied.
    The embodiment illustrated in Fig. 5 corresponds to the embodiment illustrated in Fig. 1, except that the cooling device 41 'in this case is arranged in connection with the cooling water cooler 23 to be flowed through by a cooling air flow. In this embodiment, it is thus a cooling medium in the form of ambient air which is used for cooling the gearbox oil in the cooling device 41 '. The gearbox oil flowing through the cooling device 41 'is thus cooled by air which is blown by the speed wind against the cooling device 41' when the motor vehicle 1 is in motion. In the illustrated example, a flake 31 is arranged to generate, if necessary, a supplementary air flow through the coolant water cooler 23 and the cooling device 17 41 '. Thus, when the vane 31 is in operation, the air flow through the cooling device 41 'depends both on the speed wind, ie the speed of the motor vehicle, and on the speed of the vane 31. In this case the electronic control device 44 is arranged to receive information about the motor vehicle speed and the vane speed, for example from the engine control unit 14, and to determine the radiating flow of the refrigerant flowing through the cooling device 41 'based on this information. The electronic control device 44 is further arranged to receive the food value with respect to the radiating temperature of the coolant from a temperature sensor 46 which is arranged to supply the temperature of the ambient air.
    As mentioned above, the electronic control device 44 is arranged to determine the above-mentioned pump power drilling value in dependence on the following variables: the radiating flow and the radiating temperature of the coolant and the radiating temperature of the gear oil. This can be done either with the help of a predetermined calculation model or with the help of look-up tables. The calculation model or look-up tables are designed in such a way that the bar value determined by the electronic control device 44 corresponds to a pump power optimized with respect to the said variables, which provides good cooling of the gear oil in an energy-efficient manner, in order to avoid the oil pump 43, 43 'being driven with an unnecessary hay and energy-demanding pump power which is within an upper power range where an increase of the pump power and thus an increase of the oil flow through the cooling device 41, 41 'only gives a negligible increase of the cooling power. This solution is based on the fact that the cooling power generated in the cooling device 41, 41 'increases exponentially with increasing oil flow through the cooling device up to a certain level of the oil flow, after which the cooling effect only increases very slowly with further increasing oil flow. By avoiding driving the oil pump 43, 43 'with a pump power which is in the said upper power range, the amount of energy involved in driving the oil pump can be reduced, thereby reducing the energy or fuel consumption of the drive motor 6.
    The electronic control device 44 may be implemented by means of a single electronic control unit of the motor vehicle 1, as illustrated in Figs. 1-5. However, the electronic control device 44 could alternatively be implemented by means of two or more inboard cooperating electronic control units of the motor vehicle.
    Figures 7-9 show river diagrams illustrating various embodiments of a method according to the present invention. In all the illustrated embodiments, the electronic control device 44 controls the oil pump 43, 43 ': - according to the first control condition with shut-off oil pump or minimal pump power when the radiating temperature T of the gear oil is lower than a lower spruce value Tnedr e, and - according to the third control condition with high pump power when the radiating temperature T of the gear oil is higher than an upper spruce bar Tovre.
    In the embodiment illustrated in Fig. 7, only the above-mentioned lower and upper spruce values T „d„, Tovre are applied to the gearbox oil temperature and in this case the electronic control device 44 controls the oil pump 43, 43 'according to the second control condition with optimized pump power. When the radiating temperature T of the gearbox oil is at a value between the lower spruce value Tnedre and the upper spruce value TOvre • In addition to the radiating temperature T of the gearbox oil, the electronic control device 44 may also be arranged to take into account the drive motor motor torque. as illustrated, for example, in the river diagrams of Figs. 8 and 9. In this case, the electronic control device 44 is arranged to receive information about the radiating motor torque of the drive motor 6 from the motor control unit 14.
    In the embodiments according to Figs. 8 and 9, in addition to the above-mentioned lower and upper spruces Tnedre, Tovre is also applied to a third spruce value Tmezzan for the gearbox oil temperature, this third spruce value Tmellan has a value which lies between the lower and upper spruce values Tnedre The embodiments illustrated in Figs. 8 and 9 control the electronic control device 44 the oil pump 43, 43 ': - according to the third control state with high pump power when the drive motor motor torque is negative while the radiating temperature T of the gear oil is between the lower and upper spheres Tnedre, Tovre , according to the second control condition with optimized pump power when the engine torque of the drive motor is positive while the radiating temperature T of the gearbox oil is between the intermediate spruce between Tovre and the upper spruce Tovre, and according to the first control condition with off oil pump 43, 43 'or minimal pump power the motor torque of the drive motor is po while the radiating temperature T of the gear oil is between the lower spruce Tnedre and the intermediate spruce Tmellan • The above-mentioned spruces Tnedre, Tmellan, Tovre can be predetermined constant values which are determined, among other things, depending on the properties in the gear oil used. As a typical example, the following values could be applied: Lower = 90 ° C, Trnellan = 100 ° C and Tovre = 110 ° C.
    One or more of the branch guards Tneclre, Tmellan, Tovre used, and in particular the upper branch guard, could alternatively have a variable value determined by the electronic control device 44 depending on information regarding radiating and / or estimated future operating conditions of the motor vehicle 1.
    This information can, for example, refer to ambient temperature, engine power of the drive motor 6, gear bearing in the gearbox 4, roof weight (ie the weight of the vehicle vehicle in question and its load), topography, etc. The topography can be determined by tilt sensor of the motor vehicle 1 or by map data and a positioning system, such as GPS (GPS = Global Positioning System). The electronic control device 44 may, for example, be arranged, on the basis of this information and based on criteria established in advance, to determine whether the operating conditions correspond to operating conditions for lighter operation with a relatively expected cooling demand in the near future or tougher operation with a relatively high cooling requirement. 4 in the near future. In a situation with lighter operation, a higher temperature of the gearbox oil can be allowed compared to a situation with tougher operation. In the embodiment illustrated in Fig. 9, the electronic control device 44 applies a variable upper spruce value Tovre, wherein the electronic control device 44, depending on information regarding clearing and / or estimated future operating conditions of the motor vehicle 1, sets the Upper spruce value Tovre to a first value Ti at operating conditions that are judged to correspond to lighter operation and to a second value T2 in operating conditions that are judged to correspond to tougher operation. The first value T1 is higher than the second value T2 and the size of these values T1, T2 is chosen depending on the properties of the gear oil used. As a typical example, the following values could be applied: T / = 120 ° C and T2 = 110 ° C It is of course also possible to use more branch values and more control conditions than what is described above in order to achieve an even more accurate control of the pump power. at the oil pump 43, 43 '.
    Computer program code for implementing a method according to the invention is suitably included in a computer program which can be loaded into the internal memory of a computer, such as the internal memory of an electronic control unit of a motor vehicle. Such a computer program is suitably provided via a computer program product comprising a computer-storable data storage medium, which data storage medium has the computer program stored there. Said data storage medium is, for example, an optical data storage medium in the form of a CD-ROM, a DVD, etc., a magnetic data storage medium in the form of a hard disk, a floppy disk, a cassette tape, etc., or a flash memory or a memory of the ROM, PROM type. , EPROM or EEPROM. Fig. 6 very schematically illustrates an electronic control unit 50 comprising an execution means 51, such as a central processor unit (CPU), for executing computer software. The execution means 51 communicates with a memory 52, for example of the RAM type, via a data bus 53. The control unit 50 also comprises data storage medium 54, for example in the form of a Flash memory or a memory of the type ROM, PROM, EPROM or EEPROM. The execution means 51 communicates with the data storage medium 54 via the data bus 53. A computer program comprising computer program code for implementing a method according to the invention, for example in accordance with some of the embodiments illustrated in Figs. 7-9, is stored on the data storage medium 54.
    The arrangement and method according to the invention are especially intended for use with a heavy motor vehicle, such as for example a bus, a towing vehicle or a truck, but they could also be used with a ship, a power station or another plant.
    The invention is of course not limited in any way to the embodiments described above, but a number of possibilities for modifications thereof should be obvious to a person skilled in the art, without this deviating from the basic idea of the invention as defined in the appended claims. 23
    权利要求:
    Claims (5)
    [1]
    A set of drive wheels (2),
    [2]
    A gearbox (4) with an oil sump (11) arranged at the bottom of the gearbox for receiving gearbox oil,
    [3]
    A drive shaft (5) for transmitting torque between the gearbox (4) and the drive wheels (2), and
    [4]
    A drive motor (6), wherein torque is transferable from the drive motor (6) to said drive wheel (2) via the gearbox (4) and the drive shaft (5) for propelling the motor vehicle (1), characterized in that the motor vehicle (1 ) comprises an arrangement (40) according to any one of claims 1-7 for cooling the gear oil. Motor vehicle according to claim 8, characterized in that: 1. the electronic control device (44) is arranged to control the oil pump (43; 43 ') according to said third control condition when the electronic control device (44) receives information indicating that the radiating temperature of the gear oil is higher than an upper spruce value (To-tire), and 2. that said upper spruce value (Tovre) 1 is variable, the electronic control device (44) being arranged to determine the upper spruce value (Tovre) depending on information regarding radiating operating conditions of the motor vehicle (1) and / or information regarding estimated future operating conditions of the motor vehicle (1). Motor vehicle according to claim 8 or 9, characterized in that said cooling medium is formed by cooling liquid in a cooling circuit (21) connected to the drive motor (6) or by ambient air. A method of controlling an arrangement (40) for cooling gearbox oil of a gearbox (4) arranged to avert torque from a drive motor (6) to a drive shaft (5), the arrangement (40) comprising: 1. a cooling device (41; 41 ') for cooling the gearbox oil by heat exchange with a cooling medium flowing through the cooling device (41; 41'), - an oil line (42) connected to an oil sump (11) arranged at the bottom of the gearbox and to the cooling device (41; 41 ') for allowing alternating oil to be fed via the oil line (42) from the oil sump (11) and through the cooling device (41; 41') to then flow back to the oil sump, - an oil pump (43; 43 ') for generating a flow of gear oil through the oil line (42), and 2. an electronic control device (44) controlling the pump power of the oil pump (43; 43), the method being characterized in that the electronic control device (44), in depending on the radiating temperature of the gear oil, controls the oil pump ( 43; 43 ') according to any of a plurality of selectable control states, said control states comprising at least: 28 - a first control state, in which the electronic control device (44) causes the oil pump (43; 43') to be kept off or to be operated with minimal pump power, a second control state, in which the electronic control device (44) causes the oil pump (43; 43 ') to be operated with a pump power corresponding to a variable drilling value, the electronic control device (44) determining this variable drilling value depending on the value regarding the radiating flow and the radiating temperature of the coolant flowing through the cooling device (41; 41 ') and the radiating temperature of the gear oil, and - a third control state, in which the electronic control device (44) brings the oil pump (43; 43') to be operated with a high pump power which provides an oil flow for maximum cooling of the gear oil in the cooling device (41; 41 '). A computer program comprising computer program code for causing a computer to implement a method according to claim 11 when the computer program is executed on the computer. A computer program product comprising a computer storage medium readable by a computer, the computer program code having a computer program according to claim 12 being stored on the data storage medium. An electronic control unit has a motor vehicle comprising an execution means (51), a memory (52) connected to the execution means and a data storage medium (54) connected to the execution means, the computer program code having a computer program according to claim 12 being stored on said data storage medium (54). I alJ / 1 h L_ _ hh ch SA I / oh or 9h / 11 ElIi f r // 46 r - 41 / A 04 7 Oe Imomml 91
    [5]
    5. // 0 / "Q (r - - Jr, s gu -cr tr., 'AI I / zi. 1 / I t
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    同族专利:
    公开号 | 公开日
    DE112015000358T5|2016-10-06|
    SE537806C2|2015-10-20|
    WO2015115970A1|2015-08-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE19950423A1|1999-10-20|2001-04-26|Zahnradfabrik Friedrichshafen|Lubrication of motor vehicle gearbox so that ol from an oil sump is delivered to component parts of gearbox by pump|
    SE530241C2|2006-10-03|2008-04-08|Scania Cv Ab|Arrangement for cooling oil in a gearbox in a vehicle|
    KR101000431B1|2008-12-01|2010-12-13|기아자동차주식회사|Method for controlling electric oil pump of hybrid vehicle|
    KR101305184B1|2011-05-04|2013-09-12|현대자동차주식회사|Heat exchanging system for vehicle and control method thereof|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1450104A|SE537806C2|2014-01-31|2014-01-31|Motor vehicles with arrangements for cooling gearbox oil and a method for controlling such an arrangement|SE1450104A| SE537806C2|2014-01-31|2014-01-31|Motor vehicles with arrangements for cooling gearbox oil and a method for controlling such an arrangement|
    PCT/SE2015/050071| WO2015115970A1|2014-01-31|2015-01-26|Arrangement for cooling transmission fluid and method for controlling such an arrangement|
    DE112015000358.4T| DE112015000358T5|2014-01-31|2015-01-26|Motor vehicle with arrangement for cooling transmission fluid and method for controlling such an arrangement|
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