DE102005007388A1 - System for cooling gearbox, especially load switching automatic gearbox with retarder, has heat exchanger that can be decoupled from cooling system to prevent gearbox oil heating if vehicle cooling system coolant hotter than gearbox oil - Google Patents
System for cooling gearbox, especially load switching automatic gearbox with retarder, has heat exchanger that can be decoupled from cooling system to prevent gearbox oil heating if vehicle cooling system coolant hotter than gearbox oil Download PDFInfo
- Publication number
- DE102005007388A1 DE102005007388A1 DE200510007388 DE102005007388A DE102005007388A1 DE 102005007388 A1 DE102005007388 A1 DE 102005007388A1 DE 200510007388 DE200510007388 DE 200510007388 DE 102005007388 A DE102005007388 A DE 102005007388A DE 102005007388 A1 DE102005007388 A1 DE 102005007388A1
- Authority
- DE
- Germany
- Prior art keywords
- heat exchanger
- cooling
- transmission
- cooling system
- gearbox
- Prior art date
- Legal status (The legal status 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 status listed.)
- Ceased
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 64
- 239000002826 coolant Substances 0.000 title claims abstract description 19
- 238000010438 heat treatment Methods 0.000 title claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims description 44
- 238000009825 accumulation Methods 0.000 claims description 9
- 230000017525 heat dissipation Effects 0.000 claims description 2
- 230000004913 activation Effects 0.000 claims 1
- 230000002411 adverse Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
- F16H57/0413—Controlled cooling or heating of lubricant; Temperature control 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
- F16H57/0412—Cooling or heating; Control of temperature
- F16H57/0415—Air cooling or ventilation; Heat exchangers; Thermal insulations
- F16H57/0417—Heat exchangers adapted or integrated in the gearing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft ein System zur Kühlung eines Getriebes, insbesondere eines einen Retarder aufweisenden Lastschaltautomatgetriebes, gemäß dem Oberbegriff des Patentanspruchs 1. Des weiteren bezieht sich die Erfindung auf ein Verfahren zur Kühlung eines Getriebes, welches das erfindungsgemäße Kühlsystem umfasst.The The present invention relates to a system for cooling a transmission, in particular a power-shift transmission having a retarder, according to the preamble of claim 1. Furthermore, the invention relates to a method of cooling a transmission comprising the cooling system according to the invention.
Aus dem Stand der Technik sind Kühlsysteme für einen Retarder aufweisende Lastschaltautomatgetriebe bekannt, welche über einen Öl-Wasser-Wärmetauscher an das Fahrzeugkühlsystem angebunden sind. Des weiteren sind Kühlsysteme bekannt, welche für den Retarder einen separaten Kühlkreislauf aufweisen.Out the prior art are cooling systems for one Retarder having powershift transmission known, which via an oil-water heat exchanger to the vehicle cooling system are connected. Furthermore, cooling systems are known, which for the retarder a separate cooling circuit exhibit.
Bei den heutigen Getrieben liegt – bedingt durch die Charakteristik des Wärmetauschers und die Kühlmittelparameter – die mittlere Getriebesumpftemperatur üblicherweise etwa 10 - 20 Grad über der mittleren Kühlmitteltemperatur. Bei einer zu erwartenden Anhebung der mittleren Kühlmitteltemperatur, um strengeren Abgasvorschriften zu genügen, wird ebenfalls die mittlere Getriebesumpftemperatur erhöht, was sich in nachteiliger Weise auf die Lebensdauer der Getriebe negativ auswirken wird.at today's transmissions lies - due to the characteristic of the heat exchanger and the coolant parameters - the middle Gear sump temperature usually about 10 - 20 degrees above the mean coolant temperature. With an expected increase in the average coolant temperature, to meet stricter emission requirements, is also the middle Gear sump temperature increased, which adversely affects the life of the transmission negative effect.
Aus diesem Grunde weisen viele Getriebe einen zusätzlichen, vom Fahrzeugkühlsystem getrennten Kühlkreislauf mit einem Wärmetauscher auf, der als Öl-Luft-Wärmetauscher oder als Öl-Wasser-Wärmetauscher ausgeführt ist, um die Getriebekühlung in allen Betriebszuständen zu gewährleisten.Out For this reason, many transmissions have an additional, from the vehicle cooling system separate cooling circuit with a heat exchanger on that as an oil-air heat exchanger or as an oil-water heat exchanger accomplished is to the transmission cooling in all operating states to ensure.
Aus
der
Bei den aus dem Stand der Technik bekannten Systemen entsteht der Nachteil, dass auch bei geringem Wärmeanfall im Getriebe, was beispielsweise im Zugbetrieb bei geschlossener Wandlerkupplung der Fall sein kann, die Getriebesumpftemperatur nicht unterhalb der Kühlmitteltemperatur liegen kann. Dies bedeutet, dass bei einem zu kalten Getriebe das Getriebeöl durch das Kühlmittel im Wärmetauscher aufgeheizt wird.at the known from the prior art systems creates the disadvantage that even with low heat gain in the transmission, which for example in the train operation with closed Converter clutch may be the case, the transmission sump temperature not below the coolant temperature can lie. This means that if the gearbox is too cold, the transmission oil through the coolant in the heat exchanger is heated.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein System zur Kühlung eines Getriebes, insbesondere eines einen Retarder aufweisenden Lastschaltautomatgetriebes anzugeben, bei dem bei geringem Wärmeanfall im Getriebe die Getriebesumpftemperatur unterhalb der Kühlmitteltemperatur liegen kann. Des weiteren soll durch das erfindungsgemäße System gewährleistet werden, das die mittlere Getriebesumpftemperatur auch bei steigenden mittleren Kühlmitteltemperaturen sinken bzw. nicht erhöht wird.Of the present invention has for its object to provide a system for cooling a transmission, in particular a load-shift transmission having a retarder specify, in the case of low heat accumulation in the transmission, the gear sump temperature below the coolant temperature can lie. Furthermore, should by the inventive system guaranteed The mean transmission sump temperature will also rise as well mean coolant temperatures decrease or not increased becomes.
Eine weitere der Erfindung zugrundeliegende Aufgabe ist es, ein Verfahren zur Kühlung eines Getriebes anzugeben, welches das erfindungsgemäße Kühlsystem umfasst.A Another object of the invention is to provide a method for cooling specify a transmission which the cooling system according to the invention includes.
Diese Aufgabe wird für ein System zur Kühlung eines Getriebes durch die Merkmale des Patentanspruchs 1 gelöst. Ein Verfahren zur Kühlung eines Getriebes, welches das erfindungsgemäße Kühlsystem umfasst, ist Gegen stand des Patentanspruchs 3. Weitere Ausgestaltungen und Vorteile gehen aus den entsprechenden Unteransprüchen hervor.These Task is for a system for cooling a transmission solved by the features of claim 1. One Method of cooling a transmission comprising the cooling system according to the invention, is subject matter of patent claim 3. Further refinements and advantages go from the corresponding subclaims.
Demnach wird ein System zur Kühlung eines Getriebes vorgeschlagen, welches über einen als Öl-Wasser-Wärmetauscher ausgebildeten Hauptwärmetauscher an das Fahrzeugkühlsystem anbindbar ist und einen zusätzlichen Wärmetauscher umfasst, der vorzugsweise als Öl-Luft-Wärmetauscher ausgeführt ist. Hierbei ist der Hauptwärmetauscher vom Kühlsystem abkoppelbar, derart, dass eine Aufheizung des Getriebeöls, für den Fall, dass das Kühlmittel des Fahrzeugkühlsystems wärmer als das Getriebeöl ist, verhindert wird.Therefore will be a system for cooling proposed a transmission, which as an oil-water heat exchanger trained main heat exchanger to the vehicle cooling system attachable and an additional heat exchangers comprises, which is preferably designed as an oil-air heat exchanger. Here, the main heat exchanger of the cooling system decoupled, such that a heating of the transmission oil, in the event that the coolant of the vehicle cooling system cozy as the transmission oil is prevented.
Gemäß der Erfindung wird in Betriebszuständen mit geringem Wärmeanfall der Ölstrom über den Hauptwärmetauscher unterbrochen, so dass die Kühlung nur über den Zusatzwärmetauscher erfolgt. Auf diese Weise wird die Aufheizung des Getriebeöls durch das wärmere Kühlmittel des Fahrzeugkühlsystems verhindert.According to the invention becomes in operating states with low heat gain the oil flow over the Main heat exchanger interrupted, so the cooling only over the additional heat exchanger he follows. In this way, the heating of the transmission oil through the warmer coolant of the vehicle cooling system prevented.
In Betriebszuständen mit hohem Wärmeanfall, beispielsweise im Zugbetrieb bei offener Wandlerkupplung oder im Retarderbetrieb für den Fall, dass das Getriebe einen Retarder aufweist, erfolgt die Kühlung des Getriebeöls über den Haupt- und den Zusatzwärmetauscher, um die erforderliche Wärmeabfuhr zu gewährleisten.In operating conditions with high heat accumulation, for example, in train operation with open converter clutch or in Retarder operation for the case that the transmission has a retarder, which takes place cooling of the transmission oil over the Main and auxiliary heat exchangers, to the required heat dissipation to ensure.
Durch die erfindungsgemäß Konzeption kann bei geringem Wärmeanfall die Getriebesumpftemperatur unterhalb der Kühlmitteltemperatur liegen. Des weiteren wird gewährleistet, dass die mittlere Getriebesumpftemperatur auch bei steigenden Kühlmitteltemperaturen sinken oder zumindest sich nicht erhöhen wird.Due to the design according to the invention, the transmission sump temperature can be below the coolant temperature with a low heat accumulation. Furthermore, it is ensured that the mean transmission sump temperature even with increasing Coolant temperatures decrease or at least will not increase.
Die Abkopplung des Hauptwärmetauschers vom Kühlsystem kann über die Ansteuerung eines Ventils durch die Getriebesteuerung erfolgen; in vorteilhafter Weise kann die Abkopplung des Hauptwärmetauschers in Abhängigkeit vom eingelegten Gang, der Drehzahl, dem Motormoment, der Getriebesumpftemperatur, der Kühlmitteltemperatur und/oder von weiteren Parametern durchgeführt werden.The Decoupling of the main heat exchanger from cooling system can over the control of a valve by the transmission control take place; Advantageously, the decoupling of the main heat exchanger dependent on the engaged gear, the engine speed, the engine torque, the transmission sump temperature, the coolant temperature and / or performed by other parameters become.
Die Erfindung wird im Folgenden anhand der beigefügten Figuren beispielhaft näher erläutert. Es stellen dar:The The invention will be explained in more detail below by way of example with reference to the attached figures. Put it represents:
In
den
Bei
einem Betriebszustand mit hohem Wärmeanfall wird der Ölstrom durch
beide Wärmetauscher
In
Selbstverständlich fällt auch jede konstruktive Ausbildung, insbesondere jede räumliche Anordnung der einzelnen Bauteile des erfindungsgemäßen Kühlsystems an sich sowie zueinander und soweit technisch sinnvoll, unter den Schutzumfang der vorliegenden Ansprüche, ohne die Funktion des Kühlsystems, wie sie in den Ansprüchen angegeben ist, zu beeinflussen, auch wenn diese Ausbildungen nicht explizit in den Figuren oder in der Beschreibung dargestellt sind.Of course, too any constructive training, especially any spatial Arrangement of the individual components of the cooling system according to the invention in itself and to each other and as far as technically reasonable, under the scope of protection the present claims, without the function of the cooling system, as stated in the claims is indicated to influence, even if these training is not are explicitly shown in the figures or in the description.
- 11
- HauptwärmetauscherMain heat exchanger
- 22
- zusätzlicher Wärmetauscheradditional heat exchangers
- 33
- Wandlerconverter
- 44
- Retarderretarder
- 55
- VentilValve
- 66
- Steuerleitungcontrol line
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200510007388 DE102005007388A1 (en) | 2005-02-18 | 2005-02-18 | System for cooling gearbox, especially load switching automatic gearbox with retarder, has heat exchanger that can be decoupled from cooling system to prevent gearbox oil heating if vehicle cooling system coolant hotter than gearbox oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200510007388 DE102005007388A1 (en) | 2005-02-18 | 2005-02-18 | System for cooling gearbox, especially load switching automatic gearbox with retarder, has heat exchanger that can be decoupled from cooling system to prevent gearbox oil heating if vehicle cooling system coolant hotter than gearbox oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE102005007388A1 true DE102005007388A1 (en) | 2006-08-31 |
Family
ID=36793947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE200510007388 Ceased DE102005007388A1 (en) | 2005-02-18 | 2005-02-18 | System for cooling gearbox, especially load switching automatic gearbox with retarder, has heat exchanger that can be decoupled from cooling system to prevent gearbox oil heating if vehicle cooling system coolant hotter than gearbox oil |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE102005007388A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006031715A1 (en) * | 2006-07-08 | 2008-01-10 | Bayerische Motoren Werke Ag | Gearbox for a motor vehicle has first and second coolers for cooling hot gearbox oil down to first and second temperatures of 100 degrees and 80 degrees Celsius respectively |
| DE102015213949A1 (en) * | 2015-07-23 | 2017-01-26 | Zf Friedrichshafen Ag | Method for cooling a gear unit and device for carrying out |
| DE112007002505C5 (en) * | 2006-11-06 | 2024-04-18 | Schaeffler Technologies AG & Co. KG | Clutch arrangement and power transmission device with a clutch arrangement |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4494721T1 (en) * | 1993-07-01 | 1995-10-05 | Scania Cv Ab | Cooling system for a vehicle equipped with a retarder |
| JP2000046156A (en) * | 1998-07-28 | 2000-02-18 | Nissan Motor Co Ltd | Hydraulic oil cooling device for automatic transmission for vehicles |
| JP2000356261A (en) * | 1999-06-16 | 2000-12-26 | Suzuki Motor Corp | Oil cooler structure for automatic transmission |
| US6427640B1 (en) * | 2000-10-11 | 2002-08-06 | Ford Global Tech., Inc. | System and method for heating vehicle fluids |
| US20020128107A1 (en) * | 2001-03-09 | 2002-09-12 | Jatco Transtechnology Ltd. | Cooling system for working fluid used in automatic transmission of automotive vehicle |
| DE10138704A1 (en) * | 2001-08-07 | 2003-03-06 | Zahnradfabrik Friedrichshafen | Cooling system for vehicle drive, has second cooling circuit divided into sub-circuits that can be used together or separately as required, e.g. for retarder, traction and engine braking operation |
| DE10301314A1 (en) * | 2003-01-15 | 2004-07-29 | Behr Gmbh & Co. Kg | Cooling circuit, in particular for a motor vehicle transmission |
-
2005
- 2005-02-18 DE DE200510007388 patent/DE102005007388A1/en not_active Ceased
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4494721T1 (en) * | 1993-07-01 | 1995-10-05 | Scania Cv Ab | Cooling system for a vehicle equipped with a retarder |
| JP2000046156A (en) * | 1998-07-28 | 2000-02-18 | Nissan Motor Co Ltd | Hydraulic oil cooling device for automatic transmission for vehicles |
| JP2000356261A (en) * | 1999-06-16 | 2000-12-26 | Suzuki Motor Corp | Oil cooler structure for automatic transmission |
| US6427640B1 (en) * | 2000-10-11 | 2002-08-06 | Ford Global Tech., Inc. | System and method for heating vehicle fluids |
| US20020128107A1 (en) * | 2001-03-09 | 2002-09-12 | Jatco Transtechnology Ltd. | Cooling system for working fluid used in automatic transmission of automotive vehicle |
| DE10138704A1 (en) * | 2001-08-07 | 2003-03-06 | Zahnradfabrik Friedrichshafen | Cooling system for vehicle drive, has second cooling circuit divided into sub-circuits that can be used together or separately as required, e.g. for retarder, traction and engine braking operation |
| DE10301314A1 (en) * | 2003-01-15 | 2004-07-29 | Behr Gmbh & Co. Kg | Cooling circuit, in particular for a motor vehicle transmission |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006031715A1 (en) * | 2006-07-08 | 2008-01-10 | Bayerische Motoren Werke Ag | Gearbox for a motor vehicle has first and second coolers for cooling hot gearbox oil down to first and second temperatures of 100 degrees and 80 degrees Celsius respectively |
| DE112007002505C5 (en) * | 2006-11-06 | 2024-04-18 | Schaeffler Technologies AG & Co. KG | Clutch arrangement and power transmission device with a clutch arrangement |
| DE102015213949A1 (en) * | 2015-07-23 | 2017-01-26 | Zf Friedrichshafen Ag | Method for cooling a gear unit and device for carrying out |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
| 8110 | Request for examination paragraph 44 | ||
| R002 | Refusal decision in examination/registration proceedings | ||
| R003 | Refusal decision now final |
Effective date: 20130228 |