WO2001002755A1 - Hydrauliksteuerung für automatgetriebe - Google Patents
Hydrauliksteuerung für automatgetriebe Download PDFInfo
- Publication number
- WO2001002755A1 WO2001002755A1 PCT/EP2000/005838 EP0005838W WO0102755A1 WO 2001002755 A1 WO2001002755 A1 WO 2001002755A1 EP 0005838 W EP0005838 W EP 0005838W WO 0102755 A1 WO0102755 A1 WO 0102755A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- control
- hydraulic pump
- gear box
- valve
- pump
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0021—Generation or control of line pressure
- F16H61/0025—Supply of control fluid; Pumps therefore
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- 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
Definitions
- the present invention relates to an automatic transmission for motor vehicles, with a transmission control in which a proportional pressure control valve or a 3/2-way solenoid valve is used and with a hydraulic pump for control, cooling and lubrication, the delivery rate of which is a function of the engine speed.
- the hydraulic pumps are so-called constant pumps, the flow of which increases proportionally with the drive speed.
- the pump is generally designed at idling speed, with the delivered flow rate already having to meet the requirements of the gearbox to be supplied with regard to control, cooling and lubrication.
- a constant pump requires several times the required amount at higher speeds. This means that the channel cross sections of the pump must be oversized; in addition, the associated high power consumption of the pump results in poor transmission efficiency.
- variable pumps for automatic transmissions have also been proposed, the flow of which can be better adapted to the requirements, but which have a lower efficiency than a constant pump in the consumption-relevant lower to medium engine speed range; they also deliver too little oil at low engine speeds.
- EP 682 756 proposes a suction-controlled constant pump for automatic transmissions of passenger cars, in the form of a suction-throttled radial piston pump, which delivers an almost constant flow rate from a certain speed, which also requires an almost constant power consumption.
- a suction-throttled radial piston pump still has the disadvantage of high noise and pulsation.
- the known hydraulic pumps for controlling, cooling and lubricating the transmission are usually designed for a corresponding operating point, with the result that at speeds below this operating point the hydraulic supply is in the undercoverage or that at speeds above the operating point the hydraulic supply is in the overcoverage and the transmission consumes unnecessary power, which also negatively affects the efficiency of the transmission; furthermore, it is not possible to supply the hydraulic circuit of the transmission as required, regardless of the engine speed.
- the object of the present invention is to design an automatic transmission for motor vehicles in such a way that the hydraulic circuit can be supplied as required, regardless of the engine speed.
- an additional hydraulic pump is integrated into the automatic transmission and can be connected to the hydraulic circuit of the transmission as required.
- the additional hydraulic pump is advantageously switched on by a proportional pressure control valve which is already present in the conventional transmission control or an additional 3/2-way solenoid valve, in which part of the control range is also used to switch the additional hydraulic pump via a hydraulic switching valve.
- this valve can also control the existing retarder, which has the following advantages: a) for the control of the additional hydraulic pump, no additional effort in terms of electrical, wiring and electronics is necessary; b) the increase in the amount of hydraulic oil required can be activated on an event-controlled basis; c) when using a retarder, the storage unit otherwise required can be omitted; d) the primary hydraulic pump can be designed for a low operating point and therefore a better value in terms of efficiency; e) if the storage unit is omitted, no air connection is necessary, based on the transmission interfaces, so that the interfaces to the vehicle are reduced; and f) during retarder operation, the hydraulic oil flow through the heat exchanger or cooler can be increased in order to dissipate a higher amount of heat; this allows the construction volume of the heat exchanger or cooler to be reduced.
- 1 in the figure denotes the additional hydraulic pump arranged in accordance with requirements and can be switched on, 2 an oil sump, 3 an hydraulic supply for the automatic transmission, that is to say Control, cooling and lubrication leading line, with 4 the proportional pressure control valve present in the transmission control and with 5 a hydraulic valve which activates the additional hydraulic pump.
- the additional hydraulic pump 1 is connected via the proportional pressure control valve 4, which is present in the conventional transmission control. Part of the control range of this proportional pressure control valve 4 can also be used to switch on the additional hydraulic pump 1 via the connection valve 5.
- the proportional pressure control valve can also control a retarder connected to the gearbox, based on the application. When not switched on, the additional hydraulic pump 1 runs at zero pressure.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
- General Details Of Gearings (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00942122A EP1192370A1 (de) | 1999-07-01 | 2000-06-24 | Hydrauliksteuerung für automatgetriebe |
JP2001507960A JP2003503666A (ja) | 1999-07-01 | 2000-06-24 | 自動変速機 |
BR0012092-8A BR0012092A (pt) | 1999-07-01 | 2000-06-24 | Caixa de câmbio automática |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19930356.8 | 1999-07-01 | ||
DE1999130356 DE19930356A1 (de) | 1999-07-01 | 1999-07-01 | Automatgetriebe |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001002755A1 true WO2001002755A1 (de) | 2001-01-11 |
Family
ID=7913305
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/005838 WO2001002755A1 (de) | 1999-07-01 | 2000-06-24 | Hydrauliksteuerung für automatgetriebe |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1192370A1 (de) |
JP (1) | JP2003503666A (de) |
CN (1) | CN1355875A (de) |
BR (1) | BR0012092A (de) |
DE (1) | DE19930356A1 (de) |
WO (1) | WO2001002755A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10125260A1 (de) * | 2001-05-23 | 2002-11-28 | Zahnradfabrik Friedrichshafen | Getriebe mit einer bedarfsorientierten Ölversorgung |
DE10207076A1 (de) | 2002-02-20 | 2003-08-28 | Zahnradfabrik Friedrichshafen | Ölversorgungseinrichtung |
US20040179962A1 (en) * | 2003-03-12 | 2004-09-16 | Hopper Mark L. | System and method for regulating pressure in an automatic transmission |
US7925405B2 (en) | 2006-08-21 | 2011-04-12 | GM Global Technology Operations LLC | Torque distribution system with electronic power take-off module |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2761388A (en) * | 1951-08-10 | 1956-09-04 | Gen Motors Corp | Hydraulic fluid system |
US3181677A (en) * | 1960-11-03 | 1965-05-04 | Gen Motors Corp | Transmission |
GB2014257A (en) * | 1978-02-09 | 1979-08-22 | Gen Motors Corp | Transmissions Having Controls and a Fluid Supply |
DE19641559A1 (de) * | 1996-10-09 | 1998-04-16 | Voith Turbo Kg | Antriebseinheit mit thermisch geregelter Wasserpumpe |
DE19750675C1 (de) * | 1997-11-15 | 1998-08-13 | Zahnradfabrik Friedrichshafen | Ölpumpe |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3403583A (en) * | 1966-11-25 | 1968-10-01 | Gen Motors Corp | Transmission |
DE3727633A1 (de) * | 1987-08-19 | 1989-03-02 | Manfred Rattunde | Kegelscheibenumschlingungsgetriebe mit geregelter druckmittelmenge |
DE4139611A1 (de) * | 1991-11-30 | 1993-06-03 | Zahnradfabrik Friedrichshafen | Getriebe mit einer verdraengerpumpe |
-
1999
- 1999-07-01 DE DE1999130356 patent/DE19930356A1/de not_active Ceased
-
2000
- 2000-06-24 BR BR0012092-8A patent/BR0012092A/pt not_active Application Discontinuation
- 2000-06-24 JP JP2001507960A patent/JP2003503666A/ja not_active Withdrawn
- 2000-06-24 EP EP00942122A patent/EP1192370A1/de not_active Withdrawn
- 2000-06-24 CN CN 00808903 patent/CN1355875A/zh active Pending
- 2000-06-24 WO PCT/EP2000/005838 patent/WO2001002755A1/de not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2761388A (en) * | 1951-08-10 | 1956-09-04 | Gen Motors Corp | Hydraulic fluid system |
US3181677A (en) * | 1960-11-03 | 1965-05-04 | Gen Motors Corp | Transmission |
GB2014257A (en) * | 1978-02-09 | 1979-08-22 | Gen Motors Corp | Transmissions Having Controls and a Fluid Supply |
DE19641559A1 (de) * | 1996-10-09 | 1998-04-16 | Voith Turbo Kg | Antriebseinheit mit thermisch geregelter Wasserpumpe |
DE19750675C1 (de) * | 1997-11-15 | 1998-08-13 | Zahnradfabrik Friedrichshafen | Ölpumpe |
Also Published As
Publication number | Publication date |
---|---|
DE19930356A1 (de) | 2001-01-04 |
CN1355875A (zh) | 2002-06-26 |
EP1192370A1 (de) | 2002-04-03 |
JP2003503666A (ja) | 2003-01-28 |
BR0012092A (pt) | 2002-04-02 |
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