US20050056491A1 - Method for the circulation of an oil quantity and an oil circuit for the performance of the method - Google Patents
Method for the circulation of an oil quantity and an oil circuit for the performance of the method Download PDFInfo
- Publication number
- US20050056491A1 US20050056491A1 US10/926,186 US92618604A US2005056491A1 US 20050056491 A1 US20050056491 A1 US 20050056491A1 US 92618604 A US92618604 A US 92618604A US 2005056491 A1 US2005056491 A1 US 2005056491A1
- Authority
- US
- United States
- Prior art keywords
- oil
- storage medium
- circulation system
- circulating
- oil circulation
- 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.)
- Abandoned
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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
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0406—Absorption elements for lubricants, e.g. oil felts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
- F01M5/005—Controlling temperature of lubricant
Definitions
- the invention concerns first a procedure for the circulation of a quantity of oil in accord with the generic concept of patent claim 1 and second an oil circuit for a transmission in accord with the generic concept of claim 2 .
- Oil which is in circulation in a motor vehicle transmission, exhibits temperature related viscosities, wherein a high viscosity at low temperatures leads to increased friction in the gear train, increased power consumption by the pump and a degradation of the efficiency of the drive action of the motor vehicle while the warm-up phase lasts.
- the proposition has already been made to warm the oil more rapidly in an oil circulation system, in order the shorten the heating phase and to reach a more favorable efficiency.
- the said porous medium can be optionally placed in the course of the circulation, but most favorably within the transmission housing and/or in the oil pan.
- the advantage arises in connection with the invented storage medium, that an optionally given amount of cold oil is held out of circulation, until it has reached a sufficient temperature.
- the porous storage mass can be in an optional shape, for example, placed in the oil pan on the bottom or on the sides and in that place fulfill its temporary, temperature conditioned, storage and retention functions for the oil.
- the size of the pores is so selected, that the storage medium can accept “thick” oil easily. “Thinner” oil, i.e., heated oil, will be released from said porosity of the storage medium without significant resistance.
- the storage medium can be made of various materials, which exhibit specific porosity or permeate retention. These materials could be, for example, foamed metal, or woven stranded metal, or a feltlike substance. Ceramic and plastic substances are also possible, directly as porous materials or again woven.
- the storage medium can have an elevated hollow space portion, wherewith the advantage of a small internal reservoir, i.e., additional storage space is available.
- the storage medium can undertake additional functions, namely those of an oil filter, heat insulation or body noise abatement.
- the latter can especially be achieved, in that the oil pan and/or parts of the transmission housing can be internally lined with the said storage medium. With such a lining, the advantage of loss of heat during the heating-up phase and the emission of noise is still retained.
- FIG. 1 exhibits an exemplary, partial component of a complete oil circulation system, the complete system not being shown.
- an oil pan 1 this being a supply tank for refluxed oil.
- the part of the complete system can be for an automatic transmission with a circulation system for oil serving both lubrication and hydraulic pressure purposes.
- the oil pan 1 the oil is shown at an oil level 1 a.
- the oil pan possesses a bottom 1 b and an oil exit line 2 extending therefrom.
- the oil is removed from the exit line 2 by a pump 3 and injected into the additional circulation system 4 (not shown).
- the oil is returned from a transmission exit through an oil return line 5 , thereby regaining its storage in the oil pan 1 .
- a solid body made of a porous storage medium 6 is found in place, this being generally a foamed metal, which has a high effective space portion and is thus in a position to accept and store the incoming oil.
- the storage medium 6 is here, as an example, depicted as a somewhat rectangular sided block and supports itself on two feet, namely 7 , 8 , on the bottom 1 b of the oil pan 1 .
- the storage medium 6 lies, thus not directly on the bottom 1 b, but is available for oil contact on all sides, even with oil flowing therebeneath.
- Another arrangement of the storage medium 6 could be considered, wherein an inner cladding of the oil pan 1 with a layer of the storage medium 6 material. Thereby, it is possible that both heat insulation of the oil pan 1 is acquired and noise radiation is prevented.
- the function of the storage medium 6 is as follows: Upon a cold start of the internal combustion motor of the vehicle, cold viscous oil is found in the oil pan 1 , which flows only with difficulty. A part of all the oil, which is intended to be circulated, is found in the storage medium 6 .
- the pump 3 transfers only that oil which is to be found outside of the storage medium 6 , that is to say, the pump moves a portion of the oil into the oil circulation system 4 , from which the portion returned, now at an elevated temperature, reenters the oil pan 1 through the return line 5 . In this way, the resident oil in the oil pan 1 is heated. This heat is then immediately transferred by conduction and convection to the oil in the storage medium 6 .
- the oil in the storage medium 6 then becomes more fluid, which allows it to preferentially leave the storage medium 6 and enter into the supply of oil to the pump 3 to join the general circulation of oil. Thereby, successively, more and more of the oil retained in the storage medium 6 mixes into the circulating oil and is heated.
- the respective oil, which has been circulating through the transmission thus reaches its operating temperature more rapidly, so that the transmission can operate earlier with a better efficiency.
- the storage medium 6 is not only fully surrounded by the oil flow, but to a certain degree is subjected to a through-flow of oil, whereby it provides an oil filtering function simultaneously. That is to say, the contaminate particulate in the oil is retained by the porosity of the storage medium 6 .
Abstract
A procedure for the circulation of a quantity of oil in an oil circulation system of a transmission of a motor vehicle and also concerns an oil circulation system. A portion of the quantity of the oil, which oil is at a lower temperature and a higher viscosity, is retained in a stationary, porous storage medium, from which, upon increasing oil temperature and lessening viscosity, the oil may be removed and entrained in the existing circulating oil quantity. Preferably, the storage medium is placed within an oil pan.
Description
- The invention concerns first a procedure for the circulation of a quantity of oil in accord with the generic concept of
patent claim 1 and second an oil circuit for a transmission in accord with the generic concept ofclaim 2. - Oil, which is in circulation in a motor vehicle transmission, exhibits temperature related viscosities, wherein a high viscosity at low temperatures leads to increased friction in the gear train, increased power consumption by the pump and a degradation of the efficiency of the drive action of the motor vehicle while the warm-up phase lasts. The proposition has already been made to warm the oil more rapidly in an oil circulation system, in order the shorten the heating phase and to reach a more favorable efficiency.
- In DE 199 12 327 A1 the applicant proposes, that the oil pan in a lubricating oil circuit of a motor vehicle transmission be divided into two chambers, wherein the heating phase takes oil out of only one chamber and thus leaves only a partial quantity circulating in the lubricating oil for the purpose of more rapid preliminary heating. When this is done, returning, now heated oil yields a part of its heat to the retained oil in the second chamber. This mixed oil is then successively mixed with the oil in the first chamber by a connection thereto. This solution, definitely brings about a quicker heating of the oil, but yet has the potential for improvement and a further reduction of the warm-up period of the oil.
- Thus it is the purpose of the present invention, to shorten and improve a procedure of the generic kind described in the opening passages for the initial heating period for the oil. Further, it is also the purpose of the present invention, to make available an oil circulation system, which permits a rapid heating of the oil and is simple to install.
- This purpose is achieved in both parts by the features of the
patent claims claim 1, the proposal is, that cold oil with a high viscosity is retained in a porous storage medium, removed therefrom upon increasing temperature and reduced viscosity and mixed with the already circulating oil. Thereby, upon a cold start of the motor, a small quantity of oil is already in circulation, which warms itself relatively quickly and yields its heat in the reflux flow directly to the retained oil in the storage medium, now of higher viscosity. In accord withclaim 2, an oil circulation in a motor vehicle transmission is proposed, which is especially applicable for the carrying out of the invented procedure. In accord with the invention, provision has been made, that the said porous medium can be optionally placed in the course of the circulation, but most favorably within the transmission housing and/or in the oil pan. The advantage arises in connection with the invented storage medium, that an optionally given amount of cold oil is held out of circulation, until it has reached a sufficient temperature. For the placement of the storage medium, no extensive installation operation, nor any valves, partition walls or interception walls are necessary. The porous storage mass can be in an optional shape, for example, placed in the oil pan on the bottom or on the sides and in that place fulfill its temporary, temperature conditioned, storage and retention functions for the oil. The size of the pores is so selected, that the storage medium can accept “thick” oil easily. “Thinner” oil, i.e., heated oil, will be released from said porosity of the storage medium without significant resistance. With this arrangement, the advantage of a quick heating of the oil and an increase of the transmission efficiency is obtained. - An advantageous embodiment of the invention can be found in the subordinate claims. In accord therewith, the storage medium can be made of various materials, which exhibit specific porosity or permeate retention. These materials could be, for example, foamed metal, or woven stranded metal, or a feltlike substance. Ceramic and plastic substances are also possible, directly as porous materials or again woven. Advantageously, the storage medium can have an elevated hollow space portion, wherewith the advantage of a small internal reservoir, i.e., additional storage space is available.
- In a further advantageous formation of the invention, the storage medium can undertake additional functions, namely those of an oil filter, heat insulation or body noise abatement. The latter can especially be achieved, in that the oil pan and/or parts of the transmission housing can be internally lined with the said storage medium. With such a lining, the advantage of loss of heat during the heating-up phase and the emission of noise is still retained.
- One embodiment of the invention is presented in the drawing and is described in greater detail in the following.
-
FIG. 1 exhibits an exemplary, partial component of a complete oil circulation system, the complete system not being shown. Depicted is anoil pan 1, this being a supply tank for refluxed oil. The part of the complete system can be for an automatic transmission with a circulation system for oil serving both lubrication and hydraulic pressure purposes. In theoil pan 1, the oil is shown at an oil level 1 a. The oil pan possesses abottom 1 b and anoil exit line 2 extending therefrom. The oil is removed from theexit line 2 by apump 3 and injected into the additional circulation system 4 (not shown). After completing its function in anentire circulation system 4, the oil is returned from a transmission exit through anoil return line 5, thereby regaining its storage in theoil pan 1. Within the oil volume in theoil pan 1, which is limited by “oil level 1a”, a solid body made of aporous storage medium 6 is found in place, this being generally a foamed metal, which has a high effective space portion and is thus in a position to accept and store the incoming oil. Thestorage medium 6 is here, as an example, depicted as a somewhat rectangular sided block and supports itself on two feet, namely 7, 8, on thebottom 1 b of theoil pan 1. Thestorage medium 6 lies, thus not directly on thebottom 1 b, but is available for oil contact on all sides, even with oil flowing therebeneath. Another arrangement of thestorage medium 6 could be considered, wherein an inner cladding of theoil pan 1 with a layer of thestorage medium 6 material. Thereby, it is possible that both heat insulation of theoil pan 1 is acquired and noise radiation is prevented. - The function of the
storage medium 6 is as follows: Upon a cold start of the internal combustion motor of the vehicle, cold viscous oil is found in theoil pan 1, which flows only with difficulty. A part of all the oil, which is intended to be circulated, is found in thestorage medium 6. Thepump 3 transfers only that oil which is to be found outside of thestorage medium 6, that is to say, the pump moves a portion of the oil into theoil circulation system 4, from which the portion returned, now at an elevated temperature, reenters theoil pan 1 through thereturn line 5. In this way, the resident oil in theoil pan 1 is heated. This heat is then immediately transferred by conduction and convection to the oil in thestorage medium 6. The oil in thestorage medium 6 then becomes more fluid, which allows it to preferentially leave thestorage medium 6 and enter into the supply of oil to thepump 3 to join the general circulation of oil. Thereby, successively, more and more of the oil retained in thestorage medium 6 mixes into the circulating oil and is heated. The respective oil, which has been circulating through the transmission thus reaches its operating temperature more rapidly, so that the transmission can operate earlier with a better efficiency. - The
storage medium 6 is not only fully surrounded by the oil flow, but to a certain degree is subjected to a through-flow of oil, whereby it provides an oil filtering function simultaneously. That is to say, the contaminate particulate in the oil is retained by the porosity of thestorage medium 6. - Reference Numerals
-
- 1 Oil pan
- 1 a Level of oil in oil pan
- 1 b Bottom of oil pan
- 2 Outlet connection for oil from pan
- 3 Pump in outlet connection line
- 4 Oil circulation system (not shown in its entirety)
- 5 Return line from oil circulation system
- 6 Storage medium
- 7 First support foot for storage medium
- 8 Second support foot for storage medium
Claims (14)
1-11. (CANCELED)
12. A method of circulating of a quantity of oil in a oil circulation system of a transmission for a motor vehicle, the method comprising the steps of:
upon a cold start, retaining a portion of the quantity of oil at an initial temperature and an initial viscosity in a positionally affixed, porous storage medium; and
upon the portion of the quantity of oil retained by the storage medium increasing in temperature and decreasing in viscosity, due to circulation of general oil circulating within the oil circulation system, gradually discharging oil from the storage medium and combining the discharged oil with the general oil circulating within the oil circulation system.
13. The oil circulation system of a transmission of a motor vehicle, in which the oil circulation system comprises:
a transmission housing;
a plurality of oil lines (2, 4, 5);
a fluid transport pump (3); and
an oil pan (1);
wherein a porous storage medium (6) is located within the oil circulation system for acceptance of a portion of the circulating oil, upon a cold start, a portion of the quantity of oil at an initial temperature and an initial viscosity is retained in a porous storage medium; and
upon the portion of the quantity of oil retained in the storage medium increasing in temperature and decreasing in viscosity, due to circulation of general oil circulating within the oil circulation system, oil is gradually discharged from the storage medium and combined with the general oil circulating within the oil circulation system.
14. The oil circulation system according to claim 13 , wherein the storage medium (6) is one of a foamed metal and a metal weave.
15. The oil circulation system according to claim 13 , wherein the storage medium (6) comprises a felt like, permeable material.
16. The oil circulation system according to claim 13 , wherein the storage medium (6) is one of a ceramic material and a plastic material.
17. The oil circulation system according to claim 13 , wherein the storage medium (6) is an elevated hollow space.
18. The oil circulation system according to claim 13 , wherein the porosity of the storage medium (6) is adaptable to the viscosity of the oil.
19. The oil circulation system according to claim 13 , wherein the storage medium (6) is placed in, and affixed within the oil circulation system as a rigid body, subjected to flow of oil around and through the storage medium (6).
20. The oil circulation system according to claim 13 , wherein the storage medium (6) is located within least one of the transmission housing and the oil pan (1).
21. The oil circulation system according to claim 13 , wherein the storage medium (6) is used as an oil filter.
22. The oil circulation system according to claim 13 , wherein the storage medium (6) is used for heat insulation.
23. The oil circulation system according to claim 20 , wherein the storage medium (6) is used as a body noise damping for one of the transmission housing and the oil pan.
24. An oil circulation system for circulating of a quantity of oil for a motor vehicle, the oil circulation system comprising:
a first portion of the quantity of oil circulating within the circulating system, the first portion of the quantity of oil being at a first temperature and a first viscosity; and
a porous storage medium within the circulation system, the porous storage medium retaining the first portion of the quantity of oil at the first temperature and the first viscosity, and upon the first portion of oil sufficiently increasing in temperature and sufficiently decreasing in viscosity, dispensing the first portion of the quantity of oil and replacing the dispensed oil with oil circulating within the oil circulation system.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10342894A DE10342894A1 (en) | 2003-09-17 | 2003-09-17 | Method for circulating an oil quantity and oil circuit for carrying out the method |
DE10342894.1 | 2003-09-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050056491A1 true US20050056491A1 (en) | 2005-03-17 |
Family
ID=34258713
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/926,186 Abandoned US20050056491A1 (en) | 2003-09-17 | 2004-08-25 | Method for the circulation of an oil quantity and an oil circuit for the performance of the method |
Country Status (3)
Country | Link |
---|---|
US (1) | US20050056491A1 (en) |
JP (1) | JP2005121218A (en) |
DE (1) | DE10342894A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103321711A (en) * | 2012-03-22 | 2013-09-25 | 通用汽车环球科技运作有限责任公司 | Lubricant separation by molecular size and temperature |
US20130248292A1 (en) * | 2012-03-22 | 2013-09-26 | GM Global Technology Operations LLC | Release and Retention of Viscosity Modifiers Based on Oil Temperature |
US9534520B2 (en) * | 2012-05-24 | 2017-01-03 | GM Global Technology Operations LLC | Temperature-controlled segregation of hot and cold oil in a sump of an internal combustion engine |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8607664B2 (en) | 2008-04-14 | 2013-12-17 | GM Global Technology Operations LLC | Fluid motion control device |
DE102011117648B4 (en) * | 2011-11-04 | 2017-05-24 | Audi Ag | Device for adjusting the oil level in an engine and / or transmission oil sump of a motor vehicle |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3784011A (en) * | 1972-04-28 | 1974-01-08 | F P Smith Corp | Automatic transmission fluid filter |
US4270497A (en) * | 1979-08-22 | 1981-06-02 | Valerio Robert M | Oil pan for internal combustion engines |
US4616609A (en) * | 1984-06-29 | 1986-10-14 | Muench Otto | Oil circulation circuit for internal combustion engine, and method of circulating lubricating oil |
US4790938A (en) * | 1986-01-24 | 1988-12-13 | Younger Gilbert W | Filter for removing particulate matter from fluid within a movable body |
US5339776A (en) * | 1993-08-30 | 1994-08-23 | Chrysler Corporation | Lubrication system with an oil bypass valve |
US6131650A (en) * | 1999-07-20 | 2000-10-17 | Thermal Corp. | Fluid cooled single phase heat sink |
US6216772B1 (en) * | 1996-09-24 | 2001-04-17 | Volvo Lastvagnar Ab | Device for filtering and cooling |
US6235806B1 (en) * | 1998-06-26 | 2001-05-22 | Nisshinbo Industries, Inc. | Open-celled rigid polyurethane foam and method for producing the same |
US20040045913A1 (en) * | 2000-12-12 | 2004-03-11 | Flanagan Peter J. | Disc-type filtration apparatus including discharge collector internal to pressure vessel and method of filtration |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5962797A (en) * | 1982-04-01 | 1984-04-10 | Isuzu Motors Ltd | Remover of foreign matter in oil sump |
US5031403A (en) * | 1988-10-07 | 1991-07-16 | Kanzaki Kokyukoki Mfg. Co. Ltd. | Axle driving apparatus |
GB9515242D0 (en) * | 1995-07-25 | 1995-09-20 | Ecc Int Ltd | Porous mineral granules |
DE19912327A1 (en) * | 1999-03-19 | 2000-09-21 | Zahnradfabrik Friedrichshafen | Method and device for lubricating a transmission of a motor vehicle |
EP1091162B1 (en) * | 1999-10-06 | 2003-12-17 | Ford Global Technologies, Inc., A subsidiary of Ford Motor Company | Cleaning mat for gear mechanism |
DE10034301C2 (en) * | 2000-07-14 | 2002-06-13 | Bruss Dichtungstechnik | Soundproof housing for noise generating machines |
-
2003
- 2003-09-17 DE DE10342894A patent/DE10342894A1/en not_active Withdrawn
-
2004
- 2004-08-25 US US10/926,186 patent/US20050056491A1/en not_active Abandoned
- 2004-09-17 JP JP2004272046A patent/JP2005121218A/en not_active Withdrawn
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3784011A (en) * | 1972-04-28 | 1974-01-08 | F P Smith Corp | Automatic transmission fluid filter |
US4270497A (en) * | 1979-08-22 | 1981-06-02 | Valerio Robert M | Oil pan for internal combustion engines |
US4616609A (en) * | 1984-06-29 | 1986-10-14 | Muench Otto | Oil circulation circuit for internal combustion engine, and method of circulating lubricating oil |
US4790938A (en) * | 1986-01-24 | 1988-12-13 | Younger Gilbert W | Filter for removing particulate matter from fluid within a movable body |
US5339776A (en) * | 1993-08-30 | 1994-08-23 | Chrysler Corporation | Lubrication system with an oil bypass valve |
US6216772B1 (en) * | 1996-09-24 | 2001-04-17 | Volvo Lastvagnar Ab | Device for filtering and cooling |
US6235806B1 (en) * | 1998-06-26 | 2001-05-22 | Nisshinbo Industries, Inc. | Open-celled rigid polyurethane foam and method for producing the same |
US6131650A (en) * | 1999-07-20 | 2000-10-17 | Thermal Corp. | Fluid cooled single phase heat sink |
US20040045913A1 (en) * | 2000-12-12 | 2004-03-11 | Flanagan Peter J. | Disc-type filtration apparatus including discharge collector internal to pressure vessel and method of filtration |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103321711A (en) * | 2012-03-22 | 2013-09-25 | 通用汽车环球科技运作有限责任公司 | Lubricant separation by molecular size and temperature |
US20130248293A1 (en) * | 2012-03-22 | 2013-09-26 | GM Global Technology Operations LLC | Lubricant Separation by Molecular Size and Temperature |
US20130248292A1 (en) * | 2012-03-22 | 2013-09-26 | GM Global Technology Operations LLC | Release and Retention of Viscosity Modifiers Based on Oil Temperature |
US9534520B2 (en) * | 2012-05-24 | 2017-01-03 | GM Global Technology Operations LLC | Temperature-controlled segregation of hot and cold oil in a sump of an internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
JP2005121218A (en) | 2005-05-12 |
DE10342894A1 (en) | 2005-04-14 |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: ZF FRIEDRICHSHAFEN AG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GRIESMEIER, UWE;ALTVATER, ROLAND;REEL/FRAME:015096/0390 Effective date: 20040716 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |