WO1993018314A1 - A double clutch arrangement - Google Patents

A double clutch arrangement Download PDF

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Publication number
WO1993018314A1
WO1993018314A1 PCT/GB1993/000427 GB9300427W WO9318314A1 WO 1993018314 A1 WO1993018314 A1 WO 1993018314A1 GB 9300427 W GB9300427 W GB 9300427W WO 9318314 A1 WO9318314 A1 WO 9318314A1
Authority
WO
WIPO (PCT)
Prior art keywords
clutch
arrangement
piston
clutches
engaging means
Prior art date
Application number
PCT/GB1993/000427
Other languages
French (fr)
Inventor
John Robert Barton
Christian John Brace
Original Assignee
Massey Ferguson Manufacturing Limited
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 Massey Ferguson Manufacturing Limited filed Critical Massey Ferguson Manufacturing Limited
Priority to US08/146,149 priority Critical patent/US5480014A/en
Priority to PL93301286A priority patent/PL171032B1/en
Priority to EP93904276A priority patent/EP0584316B1/en
Priority to DE69310285T priority patent/DE69310285T2/en
Priority to BR9305425A priority patent/BR9305425A/en
Publication of WO1993018314A1 publication Critical patent/WO1993018314A1/en

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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/06—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch
    • F16D25/062—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces
    • F16D25/063—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially
    • F16D25/0635—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially with flat friction surfaces, e.g. discs
    • F16D25/0638—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially with flat friction surfaces, e.g. discs with more than two discs, e.g. multiple lamellae
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D21/00—Systems comprising a plurality of actuated clutches
    • F16D21/02—Systems comprising a plurality of actuated clutches for interconnecting three or more shafts or other transmission members in different ways
    • F16D21/06—Systems comprising a plurality of actuated clutches for interconnecting three or more shafts or other transmission members in different ways at least two driving shafts or two driven shafts being concentric
    • 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
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/3023—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by fluid pressure
    • F16H63/3026—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by fluid pressure comprising friction clutches or brakes
    • 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
    • F16H61/68—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 stepped gearings
    • F16H61/684—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 stepped gearings without interruption of drive
    • F16H61/688—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 stepped gearings without interruption of drive with two inputs, e.g. selection of one of two torque-flow paths by clutches
    • 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
    • F16H61/70—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 change-speed gearing in group arrangement, i.e. with separate change-speed gear trains arranged in series, e.g. range or overdrive-type gearing arrangements

Definitions

  • This invention relates to clutches and in particular to clutches used to couple gear wheels to associated shafts in a vehicle transmission in order to engage selected drive ratios.
  • Such clutches are frequently arranged to be able to operate under load to provide a so-called "powershift" transmission in which ratio changes can be made without loss of driving torque through the transmission and without the operation of any associated main drive clutch.
  • Such clutches are arranged in a double clutch arrangement positioned between two gear wheels with one clutch of the arrangement arranged to couple one gear to an associated shaft and the other clutch arranged alternatively to couple the other gear wheel to the same shaft.
  • a double clutch arrangement including first and second clutches with an engaging means therebetween, the engaging means being movable in a first direction to engage the first clutch and disengage the second clutch and in a secon direction opposite to said first direction to engage the second clutch and disengage the first clutch, and resilient means are positioned between the engaging means and each respective clutch such that all clutch engaging pressure is transmitted from the engaging means to each respective clutch vi the resilient means so that during changes between the engaged states of th clutches the resilient means maintain sufficient clutch engagement pressur to ensure that the output torque of the arrangement never falls to zero.
  • the engaging means is moved in the first direction by spring means and in the second direction by fluid pressure.
  • Each resilient means preferably comprises one or more conical Belleville springs positioned between the engaging means and the associated clutch.
  • the clearance between the engaging means, the Belleville springs and the clutches and the conical distortion of the Belleville springs ensuring that the output torque of the arrangement never falls to zero.
  • each clutch is of a multi-plate type.
  • the operation of the clutches may be further modulated by a modulating valve which controls the rate of increase and decrease of fluid pressure.
  • Figure 1 shows a vertical section through part of a tractor gearbox which includes a double clutch in accordance with the present invention
  • Figure 2 is an enlarged view of part of Figure 2
  • Figure 3 shows the torque curve of the double clutch during changes in the state of engagement of the clutches.
  • this shows part of a tractor gearbox in which gears 10 and 11 are rotatably mounted around an input shaft 12 and are arranged to be selectively coupled to the shaft 12 via a double clutch arrangement 13.
  • Gears 10 and 11 mesh respectively with gears 14 and 15 which are splined at 14a and 15a onto a hollow shaft 16 which drives the adjacent stage of the gearbox.
  • a hollow shaft 17 surrounding input shaft 12 drives gear 18 which meshes with gear 19.
  • Gear 19 is in turn splined on to a power-take-off drive shaft 20 which extends down the centre of hollow shaft 16 to the rear of the tractor transmission.
  • Multi-plate clutch 21 comprises a first set of clutch plates 23 splined at their inner peripheries onto a support member 24, which is splined at 25 to the input shaft 12.
  • the support member 24 also rotatably supports the gear 10 at interface 26.
  • a second set of clutch plates 27 is splined onto a pressed steel dish-shaped member 28 which is electron beam welded to the gear member 10.
  • the second multi-plate clutch 22 comprises a first set of clutch plates 29, which are splined at their inner peripheries onto a support member 30.
  • Support member 30 is splined at 31 to the support member 24 which is itself splined to the input shaft 12.
  • Support member 30 rotatably mounts gear 11 at interface 32.
  • a second set of clutch plates 33 is splined onto a further dish-shaped member 34 which is electron beam welded onto gear 11.
  • a clutch engaging means in the form of a piston 35 is slidably mounted via a central bore 36 on support member 24 and via a shoulder 37 on support member 30.
  • a sealed actuating chamber 38 is provided between the piston 35 and support member 30 into which hydraulic fluid under pressure can be fed via connection 39 and passages 40, 41, 42, 43, 44 to displace the piston 35 to the left as viewed in Figure 1.
  • a large Belleville spring 45 acts on the left-hand side of piston 35 to displace the piston to the right as viewed in Figure 1.
  • the radially outer portion 35a of piston 35 extends between the clutches 21 and 22 and is able to apply a clutch-engaging force on clutch 21 via the Belleville spring 46 and a pressure plate 47 and a clutch-engaging pressure on clutch 22 via a Belleville spring 48 and a pressure plate 49.
  • Figures 1 and 2 show the double clutch arrangement with second clutch 22 engaged under the action of Belleville spring 45. This causes the radially outer portion 35a of piston 35 to compress Belleville spring 48 and hence clamp the pressure plate 49 and inter-leaved clutch plates 29 and 33 to couple gear 11 to input shaft 12.
  • the tractor operator wishes to disengage the gear train 11, 15 and engage the gear train 10, 14 he operates a button or other solenoid control (not shown), which moves an hydraulic flow control valve (not shown) to admit hydraulic fluid under pressure through fitting 39 and along passages 40, 41, 42, 43, 44 into chamber 38.
  • This displaces piston 35 to the left as viewed in Figures 1 and 2 against the action Belleville spring 45.
  • Initial movement of the piston 35 to the left as viewed in Figure 2 takes up the clearance C between the Belleville 46 and pressure plate 47 and allows the Belleville 48 to begin to assume its natural conical form whilst still applyingpressure at a reduced level to the inter-leaved clutch plates 29, 33.
  • the clearance C and the conical distortion D of the Bellevilles 46 and 48 are arranged to be such that before the level of clutch engagement pressure on plates 29, 33 has fallen to a sufficiently low level to stop all transmission of torque, the pressure of engagement on inter-leaved plates 23, 27 has risen to a level sufficient to give a torque transmission capability to clutch 21. Thus there is no intermediate condition between the disengagement of clutch 22 and the engagement of clutch 21 in which there is no torque transmission capability through the double clutch arrangement.
  • the solenoid control is operated to move the hydraulic flow control valve to vent fluid pressure from chamber 38 and allow the Belleville spring 45 to begin the movement of piston 35 to the right. This takes up the clearance C which will initially exist between Belleville 48 and pressure plate 49 and allows Belleville 46 to begin to assume natural conical form so that there is again a controlled fall off in the driving torque of clutch 21 and a controlled build-up in the driving torque of clutch 22 in accordance with the curves of Figure 3.
  • the operation of the double clutch arrangement can be readily modulated in a number of ways.
  • the number and size of the resilient Bellevilles 46 and 48 can be varied and the rate at which fluid is admitted into and exhausted from the chamber 38 can be controlled by a modulating valve which can conveniently be fitted in the vicinity of connection 39 which is relatively close to' chamber 38.
  • the double clutch arrangement described above provides a particular compact axial dimension A which is typically of the order of 46 mm.
  • This means that the double clutch arrangement described can be used in place of a typical double synchroniser in an existing gearbox (again typically of the order of 46 mm in axial length for a 114 mm diameter synchroniser) to convert a previously manually selected, synchronised ratio change between two ratios into a full powershift change.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Gear-Shifting Mechanisms (AREA)

Abstract

A double clutch arrangement (13) includes first and second clutches (21, 22) with an engaging means in the form of a piston (35) positioned between the clutches. The piston is movable in a first direction to engage the first clutch (21) and disengage the second clutch (22) and in a second direction opposite to said first direction to engage the second clutch (22) and disengage the first clutch (21). Resilient means in the form of Belleville springs (46, 48) are positioned between the engaging means and each respective clutch so that all clutch engaging pressure is transmitted from the engaging means to each respective clutch via these springs. The springs ensure that during changes between the engaged states of the clutches sufficient clutch engagement pressure is maintained to ensure that the output torque of the arrangement never falls to zero.

Description

A double clutch arrangement
This invention relates to clutches and in particular to clutches used to couple gear wheels to associated shafts in a vehicle transmission in order to engage selected drive ratios.
Such clutches are frequently arranged to be able to operate under load to provide a so-called "powershift" transmission in which ratio changes can be made without loss of driving torque through the transmission and without the operation of any associated main drive clutch. Frequently, such clutches are arranged in a double clutch arrangement positioned between two gear wheels with one clutch of the arrangement arranged to couple one gear to an associated shaft and the other clutch arranged alternatively to couple the other gear wheel to the same shaft.
Powershift transmissions are traditionally relatively bulky and expensive due to the relatively large size and complexity of existing ratio engaging clutches.
It is an object of the present invention to provide a double clutch arrangement which is suitable for use in a powershift transmission and which is particularly compact and economical to produce.
According to the present invention there is provided a double clutch arrangement including first and second clutches with an engaging means therebetween, the engaging means being movable in a first direction to engage the first clutch and disengage the second clutch and in a secon direction opposite to said first direction to engage the second clutch and disengage the first clutch, and resilient means are positioned between the engaging means and each respective clutch such that all clutch engaging pressure is transmitted from the engaging means to each respective clutch vi the resilient means so that during changes between the engaged states of th clutches the resilient means maintain sufficient clutch engagement pressur to ensure that the output torque of the arrangement never falls to zero. In a preferred form the engaging means is moved in the first direction by spring means and in the second direction by fluid pressure.
Each resilient means preferably comprises one or more conical Belleville springs positioned between the engaging means and the associated clutch. The clearance between the engaging means, the Belleville springs and the clutches and the conical distortion of the Belleville springs ensuring that the output torque of the arrangement never falls to zero.
Preferably each clutch is of a multi-plate type.
The operation of the clutches may be further modulated by a modulating valve which controls the rate of increase and decrease of fluid pressure.
It is possible to provide a double clutch arrangement in accordance with the present invention whose width in an axial sense is no larger than the conventional axial width of a double mechanical gearbox synchroniser. Thus it would be possible to turn an existing gearbox provided with double mechanical synchronisers positioned between gear pairs into a powershift transmission by replacing each double synchroniser with a double clutch in accordance with the present invention.
One embodiment of the present invention, as applied to a tractor transmission, will now be described, by way of example only, with reference to the accompanying drawings in which:
Figure 1 shows a vertical section through part of a tractor gearbox which includes a double clutch in accordance with the present invention;
Figure 2 is an enlarged view of part of Figure 2, and
Figure 3 shows the torque curve of the double clutch during changes in the state of engagement of the clutches.
Referring to Figure 1, this shows part of a tractor gearbox in which gears 10 and 11 are rotatably mounted around an input shaft 12 and are arranged to be selectively coupled to the shaft 12 via a double clutch arrangement 13. Gears 10 and 11 mesh respectively with gears 14 and 15 which are splined at 14a and 15a onto a hollow shaft 16 which drives the adjacent stage of the gearbox. A hollow shaft 17 surrounding input shaft 12 drives gear 18 which meshes with gear 19. Gear 19 is in turn splined on to a power-take-off drive shaft 20 which extends down the centre of hollow shaft 16 to the rear of the tractor transmission.
Turning now to the details of the double clutch arrangement 13, this comprises first and second multi-plate clutches 21 and 22 respectively. Multi-plate clutch 21 comprises a first set of clutch plates 23 splined at their inner peripheries onto a support member 24, which is splined at 25 to the input shaft 12. The support member 24 also rotatably supports the gear 10 at interface 26. A second set of clutch plates 27 is splined onto a pressed steel dish-shaped member 28 which is electron beam welded to the gear member 10.
In a similar fashion the second multi-plate clutch 22 comprises a first set of clutch plates 29, which are splined at their inner peripheries onto a support member 30. Support member 30 is splined at 31 to the support member 24 which is itself splined to the input shaft 12. Support member 30 rotatably mounts gear 11 at interface 32. A second set of clutch plates 33 is splined onto a further dish-shaped member 34 which is electron beam welded onto gear 11.
Between the support members 24 and 30 a clutch engaging means in the form of a piston 35 is slidably mounted via a central bore 36 on support member 24 and via a shoulder 37 on support member 30. A sealed actuating chamber 38 is provided between the piston 35 and support member 30 into which hydraulic fluid under pressure can be fed via connection 39 and passages 40, 41, 42, 43, 44 to displace the piston 35 to the left as viewed in Figure 1. A large Belleville spring 45 acts on the left-hand side of piston 35 to displace the piston to the right as viewed in Figure 1.
The radially outer portion 35a of piston 35 extends between the clutches 21 and 22 and is able to apply a clutch-engaging force on clutch 21 via the Belleville spring 46 and a pressure plate 47 and a clutch-engaging pressure on clutch 22 via a Belleville spring 48 and a pressure plate 49.
At circumferentially spaced locations around the support members 24 and 30, the ends 24a and 30a (see Figure 2) of the clutch plate splines extend through circumferentially spaced holes 35b in the piston 35 so that the support memb- ers 24 and 30 and the piston 35 rotate as a unit and locate springs 46 and 48.
Figures 1 and 2 show the double clutch arrangement with second clutch 22 engaged under the action of Belleville spring 45. This causes the radially outer portion 35a of piston 35 to compress Belleville spring 48 and hence clamp the pressure plate 49 and inter-leaved clutch plates 29 and 33 to couple gear 11 to input shaft 12.
As can be seen from Figure 2, when the clutch 22 is fully engaged under the action of Belleville 45, a clearance C exists between Belleville 46 and the pressure plate 47 of clutch 21. This clearance C is less than the conical distortion D of Belleville 46, when Belleville 46 is in an unstressed condition.
If now, for example, the tractor operator wishes to disengage the gear train 11, 15 and engage the gear train 10, 14 he operates a button or other solenoid control (not shown), which moves an hydraulic flow control valve (not shown) to admit hydraulic fluid under pressure through fitting 39 and along passages 40, 41, 42, 43, 44 into chamber 38. This displaces piston 35 to the left as viewed in Figures 1 and 2 against the action Belleville spring 45. Initial movement of the piston 35 to the left as viewed in Figure 2 takes up the clearance C between the Belleville 46 and pressure plate 47 and allows the Belleville 48 to begin to assume its natural conical form whilst still applyingpressure at a reduced level to the inter-leaved clutch plates 29, 33.
The clearance C and the conical distortion D of the Bellevilles 46 and 48 are arranged to be such that before the level of clutch engagement pressure on plates 29, 33 has fallen to a sufficiently low level to stop all transmission of torque, the pressure of engagement on inter-leaved plates 23, 27 has risen to a level sufficient to give a torque transmission capability to clutch 21. Thus there is no intermediate condition between the disengagement of clutch 22 and the engagement of clutch 21 in which there is no torque transmission capability through the double clutch arrangement.
This so-called torque overlap arrangement between clutches 21 and 22 is shown diagrammatically in Figure 3 which shows the manner in which the torque transmitting capability of clutch 22 reduces along slope 60 and the torque transmitting capability of clutch 21 subsequently increases along slope 61. As can be seen from Figure 3 at no time does the torque transmission capability of the overall double clutch arrangement fall below 15% of its maximum capability.
As will be appreciated, to engage clutch 22 the solenoid control is operated to move the hydraulic flow control valve to vent fluid pressure from chamber 38 and allow the Belleville spring 45 to begin the movement of piston 35 to the right. This takes up the clearance C which will initially exist between Belleville 48 and pressure plate 49 and allows Belleville 46 to begin to assume natural conical form so that there is again a controlled fall off in the driving torque of clutch 21 and a controlled build-up in the driving torque of clutch 22 in accordance with the curves of Figure 3.
The operation of the double clutch arrangement can be readily modulated in a number of ways. For example, the number and size of the resilient Bellevilles 46 and 48 can be varied and the rate at which fluid is admitted into and exhausted from the chamber 38 can be controlled by a modulating valve which can conveniently be fitted in the vicinity of connection 39 which is relatively close to' chamber 38.
As will be appreciated, the double clutch arrangement described above provides a particular compact axial dimension A which is typically of the order of 46 mm. This means that the double clutch arrangement described can be used in place of a typical double synchroniser in an existing gearbox (again typically of the order of 46 mm in axial length for a 114 mm diameter synchroniser) to convert a previously manually selected, synchronised ratio change between two ratios into a full powershift change.

Claims

1) A double clutch arrangement (13) including first and second clutches (21, 22), the arrangement being characterised in that an engaging means (35) is positioned between the clutches, the engaging means being movable in a first direction to engage the first clutch and disengage the second clutch and in a second direction opposite to said first direction to engage the second clutch and disengage the first clutch, and in that resilient means (46,48) are positioned between the engaging means and each respective clutch such that all clutch engaging pressure is transmitted from the engaging means to each respective clutch via the resilient means so that during changes between the engaged states of the clutches the resilient means maintain sufficient clutch engagement pressure to ensure that the output torque of the arrangement never falls to zero.
2) An arrangement according to Claim 1 characterised in that the engaging means (35) is moved in the first direction by fluid pressure and in the second direction by spring means (45).
3) An arrangement according to Claim 2 characterised in that the engaging means comprises a piston (35) with fluid pressure acting on one side (38) and spring means (45) acting on the other side.
4) An arrangement according to any one of Claims 1 to 3 characterised in that each resilient means comprises one or more conical Belleville springs (46, 48) positioned between the engaging means (35) and the associated clutch (21, 22), the clearance (C) between the engaging means, the Belleville springs (46, 48) and the clutches (21, 22) and the conical distortion (D) of the Belleville springs (46, 48) ensuring that the output torque of the arrangement never falls to zero.
5) An arrangement according to any one of Claims 1 to 4 characterised in that each clutch (21, 22) is of the multi-plate type. 6) An arrangement according to Claim 1 for clutching first and second gears (10, 11) to an associated shaft (12), the arrangement being characterised by comprising first and second support members (24, 30) secured to the shaft for rotation therewith, the support members having radially extending and axially spaced outer portions between which an actuating piston (35) is mounted for movement axially of the shaft, one side of the piston (35) co-operating with one (30) of the support members to form an actuating chamber to receive pressurised fluid for movement of the piston in the first direction, spring means (45) acting on the other side of the piston to move the piston in the second direction, a first multi-plate clutch (21) acting between the other support member (24) and a first outer dish-shaped member (28) which rotates with said first gear (10) and a second multi-plate clutch (22) acting between said one support member (30) and a second outer dish- shaped member (34) which rotates with the second gear (11).
7) An arrangement according to any one of Claims 2, 3 or 6 characterised in that the operation of the clutches (21, 22) is further modulated by a modulating valve which controls the rate of increase and decrease of the fluid pressure.
8) A vehicle transmission characterised by including a double clutch arrangement (13) according to any one of Claims 1 to 7.
PCT/GB1993/000427 1992-03-10 1993-03-02 A double clutch arrangement WO1993018314A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US08/146,149 US5480014A (en) 1992-03-10 1993-03-02 Double clutch arrangement
PL93301286A PL171032B1 (en) 1992-03-10 1993-03-02 Double clutching system
EP93904276A EP0584316B1 (en) 1992-03-10 1993-03-02 A double clutch arrangement
DE69310285T DE69310285T2 (en) 1992-03-10 1993-03-02 ARRANGEMENT OF A DOUBLE RELEASE CLUTCH
BR9305425A BR9305425A (en) 1992-03-10 1993-03-02 Dual clutch arrangement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9205163.0 1992-03-10
GB929205163A GB9205163D0 (en) 1992-03-10 1992-03-10 Clutches

Publications (1)

Publication Number Publication Date
WO1993018314A1 true WO1993018314A1 (en) 1993-09-16

Family

ID=10711809

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1993/000427 WO1993018314A1 (en) 1992-03-10 1993-03-02 A double clutch arrangement

Country Status (9)

Country Link
US (1) US5480014A (en)
EP (1) EP0584316B1 (en)
BR (1) BR9305425A (en)
DE (1) DE69310285T2 (en)
GB (2) GB9205163D0 (en)
MX (1) MX9301226A (en)
PL (1) PL171032B1 (en)
TR (1) TR27928A (en)
WO (1) WO1993018314A1 (en)

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EP0691486A1 (en) * 1994-06-20 1996-01-10 Toyota Jidosha Kabushiki Kaisha A twin-clutch-type transmission
DE10021130C1 (en) * 2000-04-29 2002-01-03 Ortlinghaus Werke Gmbh Clutch-brake combination
DE102004007760A1 (en) * 2004-02-18 2005-09-08 Zf Friedrichshafen Ag Clutch device for vehicle transmission has means of separating friction clutch from drive section or driven section
DE102004057850A1 (en) * 2004-12-01 2006-06-08 Zf Friedrichshafen Ag Switching device for transmission in vehicles, has drive shaft and drift toothed wheel whereby cone synchronization is used for synchronizing or adjusting number of revolutions of drive shaft and toothed wheel

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US5462147A (en) * 1994-06-08 1995-10-31 General Motors Corporation Engagement control mechanism for a torque transmitting device
DE19747332A1 (en) * 1997-10-27 1999-05-12 Ford Global Tech Inc Double clutch arrangement for countershaft gearboxes that can be switched without interruption in tractive power
WO2000006927A1 (en) * 1998-07-28 2000-02-10 Ernest Paul Goatley Gearbox adaptor
US6227340B1 (en) * 1999-08-24 2001-05-08 Borgwarner Inc. Automatic transmission with dual gain multi-disk friction device
FR2842270B1 (en) * 2002-07-15 2005-02-04 Peugeot Citroen Automobiles Sa GEARBOX FOR A MOTOR VEHICLE, LIMITING COUPLE BREAKS
JP4230728B2 (en) * 2002-07-16 2009-02-25 ジヤトコ株式会社 Hydraulic oil passage structure of friction element for automatic transmission
KR101859431B1 (en) * 2011-03-17 2018-06-28 한국과학기술원 Dual clutch shift gearshift control method for vechele
DE112017005775T5 (en) * 2016-11-16 2019-08-14 E-Aam Driveline Systems Ab clutch assembly

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EP0691486A1 (en) * 1994-06-20 1996-01-10 Toyota Jidosha Kabushiki Kaisha A twin-clutch-type transmission
US5711409A (en) * 1994-06-20 1998-01-27 Toyota Jidosha Kabushiki Kaisha Twin-clutch-type transmission
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Also Published As

Publication number Publication date
TR27928A (en) 1995-10-16
GB9304527D0 (en) 1993-04-21
DE69310285D1 (en) 1997-06-05
GB2264988B (en) 1995-06-28
PL171032B1 (en) 1997-02-28
DE69310285T2 (en) 1997-08-14
EP0584316B1 (en) 1997-05-02
US5480014A (en) 1996-01-02
MX9301226A (en) 1994-04-29
EP0584316A1 (en) 1994-03-02
PL301286A1 (en) 1994-04-18
BR9305425A (en) 1994-08-02
GB9205163D0 (en) 1992-04-22
GB2264988A (en) 1993-09-15

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