WO1996008664A1 - Verfahren zum steuern eines stufenlosen getriebes - Google Patents
Verfahren zum steuern eines stufenlosen getriebes Download PDFInfo
- Publication number
- WO1996008664A1 WO1996008664A1 PCT/EP1995/003528 EP9503528W WO9608664A1 WO 1996008664 A1 WO1996008664 A1 WO 1996008664A1 EP 9503528 W EP9503528 W EP 9503528W WO 9608664 A1 WO9608664 A1 WO 9608664A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pair
- operating point
- characteristic variable
- value
- characteristic
- 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
- 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
- F16H61/66—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 specially adapted for continuously variable gearings
- F16H61/662—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 specially adapted for continuously variable gearings with endless flexible members
- F16H61/66254—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 specially adapted for continuously variable gearings with endless flexible members controlling of shifting being influenced by a signal derived from the engine and the main coupling
- F16H61/66259—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 specially adapted for continuously variable gearings with endless flexible members controlling of shifting being influenced by a signal derived from the engine and the main coupling using electrical or electronical sensing or control means
Definitions
- the invention relates to a method for controlling an electronically controlled, continuously variable transmission.
- an electronic control unit determines the operating point of the continuously variable transmission on the basis of input variables.
- Continuously variable transmissions have a first pair of conical disks on an input shaft and a second pair of conical disks on an output shaft.
- Each conical disk pair consists of a first disk which is fixed in the axial direction and a second conical disk which is displaceable in the axial direction.
- a looping element for example a thrust link belt, runs between the conical disk pairs.
- the object of the invention is to provide an operating strategy for a continuously variable transmission.
- a first solution to the problem is that the operating point is determined by means of a map, which represents a dependency of the speed of the first pair of conical disks on a throttle valve position, a vehicle speed and a parameter Kl.
- a second solution to the problem is that the operating point is determined by means of a map, which represents a dependency of a ratio IV on a throttle valve position, a vehicle speed and a parameter Kl.
- the transmission ratio IV is calculated from the quotient of the speeds of the first pair of conical disks to the second pair of conical disks.
- Operating point in the sense of the invention is to be understood as a default value for the speed of the first conical disk pair to be achieved or the ratio iV to be achieved.
- the operating point be shifted continuously with increasing values of the characteristic variable K1 to higher speed values of the first pair of conical disks or a larger ratio IV.
- the operating point is continuously shifted to lower speed values of the first pair of conical disks or a smaller ratio IV.
- the electronic control device determine the characteristic variable K 1 from the input variables, which represents an operating state and each operating state is mapped to a value of the characteristic variable K 1.
- the characteristic variable K 1 can assume any discrete values between zero and two. With a value of the characteristic variable Kl of zero, an optimum consumption is set. With a value of one, a maximum performance optimum that can be predetermined by a driver, for example on the basis of a driving activity, is set. A value of two sets the maximum engine braking effect or the maximum output of an internal combustion engine.
- This solution offers the advantage that increased driving resistance, for example due to an incline or increased mass due to a trailer, leads to a higher value of the characteristic variable Kl. This in turn causes the operating point of the internal combustion engine to be corrected to higher speed values or the gear ratio iV of the continuously variable transmission to larger values in the sense of a downshift. This compensates for the influence of the increased driving resistance. The driver is therefore not forced to set a higher throttle valve value.
- Another advantage of the solution is that, for example when driving downhill, the operating point is also corrected for higher speed values of the internal combustion engine due to a higher value of the characteristic variable K1.
- the engine braking effect of the internal combustion engine is utilized.
- 1 is a block diagram of an electronically controlled, continuously variable transmission
- Fig. 2 shows an operating map
- a continuously variable transmission 3 is shown.
- the continuously variable transmission 3 is connected to an internal combustion engine 1 via a drive shaft 2.
- the continuously variable transmission 3 consists of the assemblies: hydrodynamic converter with lock-up clutch 4, reversing set 9, first conical pulley pair 10, second conical pulley pair 12, winding element 11 and hydraulic control device 14.
- the drive shaft 2 drives the hydrodynamic converter 4.
- this consists of a pump wheel 5, a turbine wheel 6 and a guide wheel 7.
- a converter lock-up clutch can be located to the hydrodynamic converter 4.
- the turbine wheel 6 or the converter lock-up clutch are connected to a transmission input shaft 8.
- the transmission input shaft 8 drives a turning set 9.
- the speed of the transmission input shaft 8 is transferred directly to the first pair of conical disks 10 via the reversing set 9, or the direction of rotation is reversed for reverse driving.
- the core of the continuously variable transmission 3 is a first pair of conical disks 10, a second pair of conical disks 12 and a wrap-around element 11.
- each pair of conical disks consists of a first conical disk which is fixed in the axial direction and a second conical disk which can be displaced in the axial direction. be.
- the looping element 11 for example a thrust link belt, runs between these conical disk pairs 10 and 12. Due to the axial displaceability of the second conical disk, the running radius of the wrap-around member 11 changes and thus the speed of the transmission input shaft 8 or the transmission ratio of the continuously variable transmission 3.
- the output takes place via the output shaft 13.
- the continuously variable transmission 3 is controlled by an electronic control unit 15 by means of electromagnetic actuators.
- the clutches and brakes and their pressure curve are controlled via the electromagnetic actuators (not shown).
- the electromagnetic actuators are located in the hydraulic control unit 14.
- the electronic control unit 15 shows as blocks: a micro controller 16, a function block control
- Input variables 19 are connected to the electronic control unit 15.
- the input variables 19 are, for example, the signal of a throttle valve position, the signal of a driving speed, a speed of a transmission input shaft, a speed of the output shaft, the temperature of a hydraulic medium and a driving activity.
- Input variables for the operating characteristic diagram are the value of a throttle valve position 20, the value of a vehicle speed 21 and the value of a characteristic variable Kl 24 - Settlement iV 23.
- the translation iV is calculated from the
- Numeral 25 shows a first map and numeral 26 an nth map.
- the parameter Kl 24 can take any discrete values between zero and two. A value of zero turns on Optimal consumption set. With a value of one, a maximum power optimum that can be specified by the driver, for example based on driving activity, is set. With a value of two, the maximum engine braking effect or the maximum output of the internal combustion engine 1 is set.
- the characteristic variable Kl 24 represents an operating state, each operating state being represented by a value of the characteristic variable Kl 24. For example, increased driving resistance due to a slope or increased mass due to a trailer leads to a higher value of characteristic variable Kl 24.
- Operating point in the sense of the invention is to be understood as a default value for the speed to be achieved of the first pair of conical disks 22 or the gear ratio iV 23 to be achieved.
- This predetermined value determined in this way is usually changed by a downstream filter and fed to a controller which controls the
- the operating point is continuously shifted with increasing values of the characteristic variable Kl 24 to higher speed values of the first conical disk pair 22 or a larger gear ratio IV 23 or, in the case of falling values of the characteristic variable Kl 24, reversed returns. Any operating point can be set. With a continuous course of the characteristic variable Kl 24, the transition from an old operating point to an operating point also takes place continuously. In Fig. 2, for example, along the line 27 B1 / B2 / B3.
- the course of the method is, for example, as follows: the driving activity results in a Kl value of 0.8. If the vehicle drives up a mountain, it increases due to the driving resistance, the Kl value steadily increases to a value of, for example, 1.5. The operating point is accordingly set higher.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59503007T DE59503007D1 (de) | 1994-09-14 | 1995-09-08 | Verfahren zum steuern eines stufenlosen getriebes |
JP8509882A JPH10505653A (ja) | 1994-09-14 | 1995-09-08 | 無段変速機の制御方法 |
US08/793,309 US5795261A (en) | 1994-09-14 | 1995-09-08 | Method of controlling a continuously variable transmission |
EP95932690A EP0781384B1 (de) | 1994-09-14 | 1995-09-08 | Verfahren zum steuern eines stufenlosen getriebes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4432678A DE4432678A1 (de) | 1994-09-14 | 1994-09-14 | Verfahren zum Steuern eines stufenlosen Getriebes |
DEP4432678.5 | 1994-09-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996008664A1 true WO1996008664A1 (de) | 1996-03-21 |
Family
ID=6528165
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1995/003528 WO1996008664A1 (de) | 1994-09-14 | 1995-09-08 | Verfahren zum steuern eines stufenlosen getriebes |
Country Status (5)
Country | Link |
---|---|
US (1) | US5795261A (de) |
EP (1) | EP0781384B1 (de) |
JP (1) | JPH10505653A (de) |
DE (2) | DE4432678A1 (de) |
WO (1) | WO1996008664A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19631070A1 (de) | 1996-08-01 | 1998-02-05 | Zahnradfabrik Friedrichshafen | Verfahren zur Vorgabe der Übersetzung eines stufenlosen Getriebes |
DE19827133A1 (de) * | 1998-06-18 | 1999-12-23 | Volkswagen Ag | Triebstrangmanagement für ein Kraftfahrzeug |
DE19849060A1 (de) * | 1998-10-24 | 2000-04-27 | Zahnradfabrik Friedrichshafen | Stadtfahr-Betriebsverfahren für ein elektronisch gesteuertes, automatisches Schaltgetriebe |
DE19943336A1 (de) * | 1999-09-10 | 2001-04-05 | Zahnradfabrik Friedrichshafen | Verfahren zur Übersetzungsregelung oder zur Drehzahlregelung |
US7678015B2 (en) | 2006-04-28 | 2010-03-16 | Caterpillar Inc. | Efficiency based integrated power train control system |
US20130131940A1 (en) * | 2010-08-04 | 2013-05-23 | Yamaha Hatsudoki Kabushiki Kaisha | Vehicle and drive control device for vehicle |
US8958961B2 (en) | 2011-12-16 | 2015-02-17 | The Gates Corporation | Continuously variable transmission |
JP6106485B2 (ja) * | 2013-03-26 | 2017-03-29 | 本田技研工業株式会社 | 無段変速機の制御装置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3902692A1 (de) * | 1988-01-29 | 1989-08-10 | Mazda Motor | Steuerung fuer stufenlos verstellbare getriebeanordnung |
US4945483A (en) * | 1987-03-31 | 1990-07-31 | Toyota Jidosha Kabushiki Kaisha | Drive control device for vehicle |
DE4120546A1 (de) * | 1991-06-21 | 1992-12-24 | Porsche Ag | Verfahren zur steuerung eines stufenlosen kraftfahrzeuggetriebes |
DE4312415A1 (de) * | 1993-04-16 | 1994-10-20 | Bosch Gmbh Robert | Verfahren zur Übersetzungseinstellung eines Getriebes |
DE4425528A1 (de) * | 1993-08-09 | 1995-04-13 | Honda Motor Co Ltd | Steuervorrichtung für ein stufenloses Fahrzeuggetriebe |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3375381D1 (en) * | 1982-04-19 | 1988-02-25 | Nissan Motor | Method and apparatus for controlling reduction ratio of continuously variable transmission |
JPS6095264A (ja) * | 1983-10-29 | 1985-05-28 | Mazda Motor Corp | 無段変速機の制御装置 |
JP2668851B2 (ja) * | 1988-01-19 | 1997-10-27 | マツダ株式会社 | 無段変速機の制御装置 |
JP2605840B2 (ja) * | 1988-11-16 | 1997-04-30 | 日産自動車株式会社 | 無段変速機の変速制御装置 |
DE4223967A1 (de) * | 1992-07-21 | 1994-01-27 | Bosch Gmbh Robert | Einrichtung zur Einstellung eines Getriebe-Abtriebsmoments oder einer Getriebe-Ausgangsleistung bei Fahrzeugen mit kontinuierlich verstellbarem Getriebe (CVT) |
US5612873A (en) * | 1992-12-17 | 1997-03-18 | Honda Giken Kogyo Kabushiki Kaisha | Speed ratio control method and device for continuously variable transmission |
-
1994
- 1994-09-14 DE DE4432678A patent/DE4432678A1/de not_active Withdrawn
-
1995
- 1995-09-08 EP EP95932690A patent/EP0781384B1/de not_active Expired - Lifetime
- 1995-09-08 JP JP8509882A patent/JPH10505653A/ja active Pending
- 1995-09-08 US US08/793,309 patent/US5795261A/en not_active Expired - Fee Related
- 1995-09-08 WO PCT/EP1995/003528 patent/WO1996008664A1/de active IP Right Grant
- 1995-09-08 DE DE59503007T patent/DE59503007D1/de not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4945483A (en) * | 1987-03-31 | 1990-07-31 | Toyota Jidosha Kabushiki Kaisha | Drive control device for vehicle |
DE3902692A1 (de) * | 1988-01-29 | 1989-08-10 | Mazda Motor | Steuerung fuer stufenlos verstellbare getriebeanordnung |
DE4120546A1 (de) * | 1991-06-21 | 1992-12-24 | Porsche Ag | Verfahren zur steuerung eines stufenlosen kraftfahrzeuggetriebes |
DE4312415A1 (de) * | 1993-04-16 | 1994-10-20 | Bosch Gmbh Robert | Verfahren zur Übersetzungseinstellung eines Getriebes |
DE4425528A1 (de) * | 1993-08-09 | 1995-04-13 | Honda Motor Co Ltd | Steuervorrichtung für ein stufenloses Fahrzeuggetriebe |
Also Published As
Publication number | Publication date |
---|---|
EP0781384B1 (de) | 1998-07-29 |
EP0781384A1 (de) | 1997-07-02 |
US5795261A (en) | 1998-08-18 |
DE4432678A1 (de) | 1996-03-21 |
JPH10505653A (ja) | 1998-06-02 |
DE59503007D1 (de) | 1998-09-03 |
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