WO2017050682A1 - Alimentation en huile d'une transmission automatique ou d'une boîte de vitesses automatisée et procédé d'alimentation de ladite transmission - Google Patents

Alimentation en huile d'une transmission automatique ou d'une boîte de vitesses automatisée et procédé d'alimentation de ladite transmission Download PDF

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Publication number
WO2017050682A1
WO2017050682A1 PCT/EP2016/072133 EP2016072133W WO2017050682A1 WO 2017050682 A1 WO2017050682 A1 WO 2017050682A1 EP 2016072133 W EP2016072133 W EP 2016072133W WO 2017050682 A1 WO2017050682 A1 WO 2017050682A1
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WO
WIPO (PCT)
Prior art keywords
oil
pressure
line
supply
pump
Prior art date
Application number
PCT/EP2016/072133
Other languages
German (de)
English (en)
Inventor
Christoph Wurster
Original Assignee
Voith Patent Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voith Patent Gmbh filed Critical Voith Patent Gmbh
Publication of WO2017050682A1 publication Critical patent/WO2017050682A1/fr

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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
    • F16H61/0031—Supply of control fluid; Pumps therefore using auxiliary pumps, e.g. pump driven by a different power source than the engine
    • 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
    • F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
    • F16H57/0435—Pressure control for supplying lubricant; Circuits or valves therefor
    • 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
    • F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
    • F16H57/0441—Arrangements of 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
    • F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
    • F16H57/0446—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control the supply forming part of the transmission control unit, e.g. for automatic transmissions
    • 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
    • F16H61/0021—Generation or control of line pressure
    • F16H2061/0037—Generation or control of line pressure characterised by controlled fluid supply to lubrication circuits of the gearing

Definitions

  • the present invention relates to an oil supply of a Automatgethebes or automated manual transmission, further comprising a motor vehicle drive train with an internal combustion engine and such a transmission, and a method for supplying such an automatic transmission or automated manual transmission according to the independent claims.
  • Oil supplies of automatic transmissions or automated manual transmissions conventionally have an oil pump in an oil supply line, by means of which oil is conveyed from an oil sump into a pressure line to the pressure oil supply of elements of the transmission.
  • the oil pump is driven by the internal combustion engine, with which drive power is fed into a motor vehicle drive train, in which the transmission is provided with the oil supply in order to transmit drive power of the internal combustion engine to drive wheels of the motor vehicle.
  • the oil pump is positioned in the gearbox.
  • Such an oil pump is also referred to as a mechanical oil pump.
  • Such comparatively large oil pumps also take on relatively large drive power, which in turn leads to increased fuel consumption of the internal combustion engine.
  • the different elements, such as clutches, brakes, transducers, hydrodynamic see brakes (retarder) and the lubrication points of a transmission, require during vehicle operation at different times a very different oil volume with very different oil pressures.
  • the present invention has for its object to provide an oil supply of an automatic transmission or automatic transmission, in which the disadvantages mentioned are avoided. Furthermore, a motor vehicle drive train with an automatic transmission or automated transmission with a corresponding oil supply and a method for supplying an automatic transmission or automated transmission with pressurized oil are to be specified, which avoid the disadvantages mentioned.
  • the object of the invention is achieved by an oil supply, a motor vehicle drive train and a method having the features of the independent claims. In the dependent claims advantageous and particularly expedient embodiments of the invention are given.
  • An inventive oil supply of an automatic transmission or automatic transmission has an oil sump and a pressure line to the pressure oil supply of elements of the transmission.
  • the elements are, for example, shifting elements such as clutches and / or brakes, in particular of lamellar type, which are actuated to selectively adjust one of several possible ratios between a transmission input shaft and a transmission output shaft of the transmission, thereby representing individual gear ratios in the transmission can be.
  • the oil of the oil supply elements such as a hydrodynamic converter, a hydrodynamic brake, retarder, and the lubrication z. B supplies the warehouse or operated.
  • the oil of the oil supply is used as the working medium for the converter and the retarder.
  • a first oil pump also called a mechanical oil pump, is provided in order to convey oil from the oil sump to a supply pressure P 0 of the working pressure line.
  • the oil pump is positioned in an oil line, which merges into the pressure line or through which the pressure line is formed.
  • the first oil pump is in mechanical connection with an internal combustion engine for its mechanical drive, that is, it is driven by the internal combustion engine.
  • the internal combustion engine is, in particular, that engine with which drive wheels of a motor vehicle are driven via the transmission for which the oil supply is provided.
  • the first oil pump for delivering oil from the oil sump to the supply pressure P 0 of the pressure line is connected in parallel with a second oil pump which is in drive connection with an electric motor for its electric drive, ie is driven by the electric motor.
  • the second oil pump and the electric motor can be combined to form a motor pump unit with a common housing.
  • the oil pumps are connected via oil lines to the pressure line, wherein on the suction side of the oil lines at least one oil strainer is provided and further on the pressure side of the oil lines check valves are provided so that the pumps can be independently in operation.
  • the oil lines can be summarized on the suction side and a common oil filter can be provided.
  • the first oil pump is designed as a variable displacement pump.
  • the delivery volume can be varied at the same drive speed, that is to say that the delivery volume of the first oil pump can be changed independently of the rotational speed of the internal combustion engine or at a constant rotational speed of the internal combustion engine. In this way, an even greater spread of the flow rate through both oil pumps, compared to an embodiment with a constant displacement pump as the first oil pump can be achieved.
  • the first mechanical oil pump can be made smaller in comparison with known embodiments and with a lower power consumption, which has a favorable effect on the fuel consumption of the internal combustion engine. Furthermore, a better on-demand oil supply to the transmission-side oil consumers is possible because, for example, the second oil pump is only operated or turned on when there is a large oil consumption or the heat input into the oil requires a correspondingly large volume of oil flow. Further, the second oil pump secures an oil supply in the conditions in which the engine is turned off, for example, when in addition to the engine, an electric machine for driving a motor vehicle driveline is provided to form a hybrid powertrain, in a purely electric driving.
  • the start / stop capability of the engine is ensured by the electric oil pump, that is, even when the engine is off, for example, when the vehicle has an automatic start / stop and the engine stops immediately when the vehicle is at rest, for example at a Traffic light, the oil supply is maintained, because the oil can be promoted with the electric oil pump and the electric motor is powered by an electric storage.
  • valves can be provided in the pressure line, by means of which the pressure line P is divided into sections and the supply pressure P 0, seen in the direction of flow, on first a first working pressure Pi , and subsequently to a second working pressure P 2 can be controlled, where P 0 >Pi> P 2 .
  • switching elements are connected to the oil supply, which are supplied with oil from the pressure line, wherein the oil supply of the switching elements takes place with the supply pressure P 0 .
  • the shifting elements include clutches or brakes required to operate or shift the transmission. Their operation takes place via switching or control valves which are coupled to the supply pressure P 0 .
  • a hydrodynamic converter in the pressure line in the region of the second working pressure P 2, a hydrodynamic converter can be provided as a starting element, which forms a subsection of the pressure line, the control of the hydrodynamic converter takes place by means of the valves in the pressure line.
  • the working medium of the hydrodynamic converter is thus the oil from the oil supply line and the converter is integrated into the pressure line, that in each operating state of the converter, this, as the pressure line, is flowed through by the oil.
  • a bypass line and a control valve may be provided, wherein the bypass line connects the pressure line via the control valve with the suction line on the suction side of the first pump, wherein by means of the control valve, the lubrication line pressure P 3 can be controlled.
  • An inventive motor vehicle drive train has an internal combustion engine and a transmission which is embodied as an automatic transmission or an automated manual transmission, in particular as a torque converter automatic transmission. Furthermore, the transmission has an oil supply of the type shown.
  • At least one electric machine may be provided to form a hybrid powertrain for a hybrid vehicle.
  • the drive wheels can be driven additionally or alternatively to the drive with the internal combustion engine.
  • An inventive method provides that regardless of the operating state of the motor vehicle drive train always encouraged so much pressure oil in the pressure line or is pumped that the supply pressure P 0 is ensured.
  • oil is always pumped out of the oil sump by means of the first oil pump as soon as the internal combustion engine is switched on. Furthermore, with the electrically driven oil pump, oil is supplied from the oil sump when the engine is shut down or when the pressure oil demand from the first oil pump can not be provided.
  • the delivery volume of the first oil pump can be additionally adjusted by adjustment depending on the Druckol tables, so that the even greater spread of the flow rate is made possible by the two oil pumps.
  • the pressure oil requirement can always be provided by both oil pumps, the first oil pump, which is designed as a variable, is adjusted by adjusting the pressure oil flow.
  • the control of the two oil pumps is carried out using operating parameters, such as the control of the transmission, engine, etc ..
  • connection and disconnection of individual consumers that is, from the detection of whether a particular consumer is switched on or off, can be concluded on an increased or reduced oil demand, depending on the oil consumption of the respective consumer.
  • the internal combustion engine is stopped and the vehicle with the electric Machine is driven, is inevitably necessary for a necessary oil production of the drive of the second oil pump.
  • the available amount of oil for faster and / or better supply to the individual transmission-side consumers and / or for a faster re-cooling of the transmission can be ideally adjusted by, for example, the second oil pump is switched on or off depending on demand.
  • Figure 1 shows an embodiment of the oil supply of a transmission, in particular
  • Motor vehicle transmission with a parallel connection of oil pumps according to the invention
  • 2 shows a further embodiment of the oil supply of a transmission, in particular motor vehicle transmission, with a parallel connection of oil pumps according to the invention
  • Figure 3 is a schematic representation of a motor vehicle drive train according to the invention.
  • oil pump 4 In the figure 1 and 2, two ways are shown how the oil supply of an automatic transmission or automatic transmission can be performed. In both embodiments, the oil supply with respect to the basic arrangement of a first, driven by the internal combustion engine, oil pump 3 and a second, driven by an electric drive 5, oil pump 4 is identical.
  • oil is conveyed via the oil line 30, 31 a, b into the pressure line 2, 12, 22, 32 by means of the pumps.
  • the supply pressure P 0 is controlled in the pressure line section 2.
  • the oil supply for the switching elements 17 branches from, wherein the individual switching elements 17 are supplied via lines 16 and the switching and control valves 15 with pressure oil.
  • the switching elements 7, not shown here may be clutches or brakes whose operation is done with the pressure oil.
  • the interconnection and regulation of the two oil pumps 3, 4 can be designed differently, as shown in FIGS. 1 and 2.
  • a supply pressure P 0 is adjustable and behind the valve 6 is always an oil flow through the pressure line 2, 12, 22, 32 and the valves 7, 8, 9, 10 to the lubrication points 20 can get.
  • Excess pressure oil can be passed via the bypass line 42, via the valve 1 1 back to the suction side of the first oil pump 3 or is passed through the pressure relief valve 51 a back into the oil sump 1.
  • a hydrodynamic converter 18 is further provided as a starting element in the pressure line 2, 12, 22, 32, which flows through or is supplied with pressure oil.
  • two heat exchangers 21, 33 are provided, one of which is positioned directly in the pressure line 2, 12, 22, 32 in front of the transducer 18.
  • Another heat exchanger 33 is arranged between the valves 8 and 9. This can be switched according to the operating state of the drive train in the Retarder GmbHsniklauf 23, for dissipating the Retarderabharide.
  • To fill the retarder circuit 23 branches from the pressure line 2, 12, 22, 32 in the region of the first working pressure Pi from a filling line 26, 41, via which the retarder 19 with oil from the pressure line 2, 12, 22, 32 can be supplied.
  • the heat exchangers 21 and 33 are arranged identically in the oil circuit. In non-braking operation of the retarder 19, both heat exchangers 21, 33 are always integrated into the oil circuit, so that as little heat as possible is introduced into the oil sump 1 or to cool the oil from the sump 1 as quickly as possible. In braking operation of the retarder 19, the heat exchanger 33 is in the retarder operating circuit 23 integrated.
  • FIGS. 1 and 2 Further details or elements illustrated in FIGS. 1 and 2 are details which are necessary for the oil supply but are not directly relevant to the design according to the invention. These were not discussed here in more detail, since they are generally known to the skilled person and the function is evident from the circuit diagrams. These include in particular the check valves 28, and the pressure relief valves 51, the sensors 36, 37, and the not mentioned valves, filters, etc.
  • FIG. 3 shows the internal combustion engine 45, the transmission 50 and the drive wheels 49. Further, as an optional feature, an electric machine 46 is shown to form a hybrid vehicle powertrain. With the electric machine 46, the drive wheels 49 can also be driven.
  • the oil sump 1 in the transmission 50 is again exemplified, as well as the first oil pump 3, the second oil pump 4 and the electric motor 4. Further, the switching elements 17 for adjusting various ratios between a transmission input shaft 47 and a transmission output shaft 48 are indicated.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Transmission Device (AREA)

Abstract

L'invention concerne une alimentation en huile d'une transmission automatique d'une boîte de vitesses automatisée, comportant : 1.1 un carter d'huile (1); 1.2 une conduite de pression (2, 12, 22, 32) pour l'alimentation en huile sous pression des éléments (17, 18, 19, 20) de la transmission; 1.3 une première pompe à huile (3) refoulant l'huile du carter d'huile (1) vers la conduite de pression (2, 12, 22, 32) à une pression d'alimentation (Po); 1.4 une soupape de régulation de pression (4) permettant de réguler la pression d'alimentation (Po); 1.5 la première pompe à huile (3) étant en liaison d'entraînement avec un moteur à combustion interne (45) pour son entraînement mécanique; 1.6 une seconde pompe à huile (4) qui est en liaison d'entraînement avec un moteur électrique (5) pour son entraînement électrique et qui est raccordée en parallèle à la première pompe à huile (3) refoulant l'huile du carter d'huile (1) vers la conduite de pression (2, 12, 22, 32).
PCT/EP2016/072133 2015-09-24 2016-09-19 Alimentation en huile d'une transmission automatique ou d'une boîte de vitesses automatisée et procédé d'alimentation de ladite transmission WO2017050682A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015218352.1A DE102015218352A1 (de) 2015-09-24 2015-09-24 Ölversorgung eines Automatgetriebes oder automatisierten Schaltgetriebes, Kraftfahrzeugantriebsstrang und Verfahren zur Versorgung eines solchen Getriebes
DE102015218352.1 2015-09-24

Publications (1)

Publication Number Publication Date
WO2017050682A1 true WO2017050682A1 (fr) 2017-03-30

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PCT/EP2016/072133 WO2017050682A1 (fr) 2015-09-24 2016-09-19 Alimentation en huile d'une transmission automatique ou d'une boîte de vitesses automatisée et procédé d'alimentation de ladite transmission

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DE (1) DE102015218352A1 (fr)
WO (1) WO2017050682A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018002042A1 (de) * 2018-03-14 2019-09-19 Daimler Ag Hydrauliksystem für ein Kraftfahrzeuggetriebe
DE102018122333A1 (de) * 2018-09-13 2020-03-19 Voith Patent Gmbh Ölkühlkreislauf eines Automatikgetriebes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020091034A1 (en) * 2000-12-28 2002-07-11 Yukinori Nakamori Drive control apparatus for oil pump
WO2006099947A1 (fr) * 2005-03-22 2006-09-28 Zf Friedrichshafen Ag Procede et dispositif pour commander une alimentation en huile pour une boite de vitesse automatique et element de demarrage
US20100018808A1 (en) * 2008-07-24 2010-01-28 Zf Friedrichshafen Ag Method for controlling the oil supply of an automatic planetary transmission

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Publication number Priority date Publication date Assignee Title
DE19909690C2 (de) 1999-03-05 2002-02-21 Voith Turbo Kg Verfahren zur Steuerung zur Befüllung eines hydrodynamischen Bauelementes und Steuervorrichtung
WO2008055464A2 (fr) 2006-11-08 2008-05-15 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Commande hydraulique pour transmission à double embrayage
JP5010965B2 (ja) 2007-04-20 2012-08-29 トヨタ自動車株式会社 油圧制御装置
DE102009054754B4 (de) 2009-12-16 2019-02-07 Zf Friedrichshafen Ag Verfahren zum Betreiben einer elektrischen Zusatzpumpe, Vorrichtung zur Durchführung eines solchen Verfahrens, und Hydrauliksystem mit einer solchen Vorrichtung.
KR101154411B1 (ko) 2010-10-14 2012-06-15 기아자동차주식회사 하이브리드 차량용 자동 변속기의 유압 제어시스템
DE102010043251A1 (de) 2010-11-03 2012-05-03 Zf Friedrichshafen Ag Ölversorgungseinrichtung für ein Getriebe eines Fahrzeuges
DE102013019319A1 (de) 2013-11-20 2015-05-21 GETRAG Getriebe- und Zahnradfabrik Hermann Hagenmeyer GmhH & Cie KG Kühlanordnung und Kühlverfahren für einen Kraftfahrzeugantriebsstrang

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020091034A1 (en) * 2000-12-28 2002-07-11 Yukinori Nakamori Drive control apparatus for oil pump
WO2006099947A1 (fr) * 2005-03-22 2006-09-28 Zf Friedrichshafen Ag Procede et dispositif pour commander une alimentation en huile pour une boite de vitesse automatique et element de demarrage
US20100018808A1 (en) * 2008-07-24 2010-01-28 Zf Friedrichshafen Ag Method for controlling the oil supply of an automatic planetary transmission

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