[go: up one dir, main page]

WO2018013750A1 - Procédé de détection du saut de came dans une transmission à variation continue planétaire du type à billes - Google Patents

Procédé de détection du saut de came dans une transmission à variation continue planétaire du type à billes Download PDF

Info

Publication number
WO2018013750A1
WO2018013750A1 PCT/US2017/041833 US2017041833W WO2018013750A1 WO 2018013750 A1 WO2018013750 A1 WO 2018013750A1 US 2017041833 W US2017041833 W US 2017041833W WO 2018013750 A1 WO2018013750 A1 WO 2018013750A1
Authority
WO
WIPO (PCT)
Prior art keywords
cam
hop
cvp
speed
signal
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
Application number
PCT/US2017/041833
Other languages
English (en)
Inventor
Jeffrey M. DAVID
T. Neil MCLEMORE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dana Ltd
Original Assignee
Dana Ltd
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 Dana Ltd filed Critical Dana Ltd
Publication of WO2018013750A1 publication Critical patent/WO2018013750A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe ; Circumventing or fixing failures
    • 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
    • F16H15/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members
    • F16H15/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members without members having orbital motion
    • F16H15/04—Gearings providing a continuous range of gear ratios
    • F16H15/06—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B
    • F16H15/26—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a spherical friction surface centered on its axis of revolution
    • F16H15/28—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a spherical friction surface centered on its axis of revolution with external friction surface
    • 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
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • F16H37/0833—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths
    • F16H37/084—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths at least one power path being a continuously variable transmission, i.e. CVT
    • F16H37/086—CVT using two coaxial friction members cooperating with at least one intermediate friction member
    • 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
    • F16H61/664—Friction gearings
    • F16H61/6649—Friction gearings characterised by the means for controlling the torque transmitting capability of the gearing
    • 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
    • F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe ; Circumventing or fixing failures
    • F16H2061/124—Limiting the input power, torque or speed

Definitions

  • Continuously variable transmissions (CVT) and transmissions that are substantially continuously variable are increasingly gaining acceptance in various applications.
  • the process of controlling the ratio provided by the CVT is complicated by the continuously variable or minute gradations in ratio presented by the CVT.
  • the range of ratios that are available to be implemented in a CVT are not sufficient for some applications.
  • a transmission is capable of implementing a combination of a CVT with one or more additional CVT stages, one or more fixed ratio range splitters, or some combination thereof in order to extend the range of available ratios.
  • the combination of a CVT with one or more additional stages further complicates the ratio control process, as the transmission will have multiple configurations that achieve the same final drive ratio.
  • the different transmission configurations could for example, multiply input torque across the different transmission stages in different manners to achieve the same final drive ratio.
  • some configurations provide more flexibility or better efficiency than other configurations providing the same final drive ratio.
  • the criteria for optimizing transmission control could be different for different applications of the same transmission.
  • the criteria for optimizing control of a transmission for fuel efficiency will differ based on the type of prime mover applying input torque to the transmission.
  • the criteria for optimizing control of the transmission will differ depending on whether fuel efficiency or performance is being optimized.
  • a computer program including instructions executable by the digital processing device, the computer program having a software module configured to control the CVP and the engine; and a plurality of data signals including: an input speed, an output speed, a CVP input torque, a CVP ratio, wherein the software module is configured to execute a cam hop detection process, wherein the cam hop detection process is configured to detect a cam hop event based at least in part on the input speed, the output speed, the CVP input torque, and the CVP ratio, and wherein the software module sends a fault mitigation command based on the detection of the cam hop event, wherein the fault mitigation command imparts a change in operating condition to the CVP or the engine.
  • a method of operating a continuously variable ball- type transmission (CVP) having a cam-ramp axial force generator mechanism including the steps of: receiving an input speed signal, an output speed signal, an input torque signal, and a CVP ratio signal; determining a speed error based at least in part on the input speed signal, the output speed signal and the desired ratio; determining a cam hop frequency based at least in part on the speed error; determining a cam hop detection criteria based at least in part on the speed error, the input torque, and the CVP ratio; determining a cam hop fault signal based at least in part on the cam hop detection criteria; and commanding a change in the CVP ratio based on the cam hop fault signal.
  • CVP continuously variable ball- type transmission
  • Figure 1 is a side sectional view of a ball-type variator.
  • Figure 2 is a plan view of a carrier member that used in the variator of
  • Figure 3 is an illustrative view of different tilt positions of the ball-type variator of Figure 1.
  • Figure 4 is an exploded view of an exemplary axial force generating device having cam ramps and rollers.
  • Figure 5 is a block diagram schematic of a transmission control system that could be implemented in a vehicle.
  • Figure 6 is a flow chart depicting a cam hop detection process that is implementable in the transmission control system of Figure 5.
  • An electronic controller is described herein that enables electronic control over a variable ratio transmission having a continuously variable ratio portion, such as a Continuously Variable Transmission (CVT), Infinitely
  • a continuously variable ratio portion such as a Continuously Variable Transmission (CVT), Infinitely
  • variable Transmission or variator.
  • the electronic controller could be configured to receive input signals indicative of parameters associated with an engine coupled to the transmission.
  • the parameters could include throttle position sensor values, accelerator pedal position sensor values, vehicle speed, gear selector position, user-selectable mode configurations, and the like, or some combination thereof.
  • the electronic controller could also receive one or more control inputs.
  • the electronic controller could determine an active range and an active variator mode based on the input signals and control inputs.
  • the electronic controller could control a final drive ratio of the variable ratio transmission by controlling one or more electronic actuators and/or solenoids that control the ratios of one or more portions of the variable ratio transmission.
  • the electronic controller described herein is described in the context of a continuous variable transmission, such as the continuous variable transmission of the type described in U.S. Patent Application Number 14/425,842, entitled “3-Mode Front Wheel Drive And Rear Wheel Drive Continuously Variable Planetary Transmission” and, PCT Patent Application Number PCT/US2016/ 030930, entitled “Control Method of Synchronous Shifting of a Multi-Range Transmission Comprising a Continuously Variable Planetary Mechanism", each assigned to the assignee of the present application and hereby incorporated by reference herein in its entirety.
  • the electronic controller is not limited to controlling a particular type of transmission, but rather, could be configured to control any of several types of variable ratio transmissions.
  • CVTs based on a ball-type variator, also known as CVP, for continuously variable planetary.
  • Basic concepts of a ball-type Continuously Variable Transmissions are described in United States Patent No. 8,469,856 and 8,870,711 incorporated herein by reference in their entirety.
  • Such a CVT adapted herein as described throughout this specification, includes a number of balls (planets, spheres) 1 , depending on the application, two ring (disc) assemblies with a conical surface contact with the balls, as input traction ring assembly 2 and output traction ring assembly 3, and an idler (sun) assembly 4 as shown on FIG. 1.
  • the output traction ring assembly 3 includes an axial force generator mechanism having a cam ball retainer disc 10 in contact with a cam driver 1.
  • the cam ball retainer disc 10 retains a number of cam rollers 13.
  • the cam rollers 13 are spheres.
  • a traction ring 12 contacts the balls 1.
  • the balls are mounted on tiltable axles 5, themselves held in a carrier (stator, cage) assembly having a first carrier member 6 operably coupled to a second carrier member 7. The first carrier member 6 rotates with respect to the second carrier member 7, and vice versa.
  • the first carrier member 6 is substantially fixed from rotation while the second carrier member 7 is configured to rotate with respect to the first carrier member, and vice versa.
  • the first carrier member 6 is provided with a number of radial guide slots 8.
  • the second carrier member 7 is provided with a number of radially offset guide slots 9, as illustrated in FIG. 2.
  • the radial guide slots 8 and the radially offset guide slots 9 are adapted to guide the tiltable axles 5.
  • the axles 5 are adjustable to achieve a desired ratio of input speed to output speed during operation of the CVT. In some embodiments, adjustment of the axles 5 involves control of the position of the first 6 and second carrier 7 members to impart a tilting of the axles 5 and thereby adjusts the ratio of the variator.
  • Other types of ball CVTs also exist, like the one produced by Milner, but are slightly different.
  • FIG. 3 The working principle of such a CVP of FIG. 1 is shown on FIG. 3.
  • the CVP itself works with a traction fluid.
  • the lubricant between the ball and the conical rings acts as a solid at high pressure, transferring the power from the input ring, through the balls, to the output ring.
  • the ratio is changed between input and output.
  • the ratio is one, as illustrated in FIG. 3, when the axis is tilted, the distance between the axis and the contact point change, modifying the overall ratio. All the balls' axes are tilted at the same time with a mechanism included in the carrier and/or idler.
  • Embodiments disclosed herein are related to the control of a variator and/or a CVT using generally spherical planets each having a tiltable axis of rotation that is adjustable to achieve a desired ratio of input speed to output speed during operation.
  • adjustment of said axis of rotation involves angular misalignment of the planet axis in a first plane in order to achieve an angular adjustment of the planet axis in a second plane that is substantially perpendicular to the first plane, thereby adjusting the ratio of the variator.
  • the angular misalignment in the first plane is referred to here as "skew", “skew angle”, and/or "skew condition".
  • a control system coordinates the use of a skew angle to generate forces between certain contacting components in the variator that will tilt the planet axis of rotation. The tilting of the planet axis of rotation adjusts the ratio of the variator.
  • a torque dependent axial force is generated to provide sufficient traction between the traction ring 12 and the balls 1 , for example.
  • a cam-ramp mechanism is used to generate the axial force.
  • the cam-ramp mechanism includes the cam rollers 13 in contact with a number of ramp surfaces 14 formed on the traction ring 12, for example.
  • the ramp surface 14 has a peak surface 15 and a valley surface 16.
  • the cam roller 13 is positioned along the ramp surface 14. Under certain operating conditions, the torque transmitted through the CVP exceeds the designed limit, and the cam roller 13 travels up the ramp 14 to the peak surface 15 and falls to the valley surface 16. This phenomenon is referred to herein as "cam hop” or "cam hop event”.
  • torque threshold indicates a calibratable value of torque at which a designer desires a control sub-module to enable operation or dis-able operation.
  • operably coupleable refers to a relationship (mechanical, linkage, coupling, etc.) between elements whereby operation of one element results in a corresponding, following, or simultaneous operation or actuation of a second element. It is noted that in using said terms to describe inventive embodiments, specific structures or mechanisms that link or couple the elements are typically described. However, unless otherwise specifically stated, when one of said terms is used, the term indicates that the actual linkage or coupling will take a variety of forms, which in certain instances will be readily apparent to a person of ordinary skill in the relevant technology.
  • radial indicates a direction or position that is perpendicular relative to a longitudinal axis of a transmission or variator.
  • axial refers to a direction or position along an axis that is parallel to a main or longitudinal axis of a transmission or variator.
  • Traction drives usually involve the transfer of power between two elements by shear forces in a thin fluid layer trapped between the elements.
  • the fluids used in these applications usually exhibit traction coefficients greater than conventional mineral oils.
  • the traction coefficient ( ⁇ ) represents the maximum available traction forces that would be available at the interfaces of the contacting components and is a measure of the maximum available drive torque.
  • friction drives generally relate to transferring power between two elements by frictional forces between the elements.
  • the traction coefficient ⁇ is a function of the traction fluid properties, the normal force at the contact area, and the velocity of the traction fluid in the contact area, among other things.
  • the traction coefficient ⁇ increases with increasing relative velocities of
  • Traction fluid is also influenced by entrainment speed of the fluid and temperature at the contact patch, for example, the traction coefficient is generally highest near zero speed and decays as a weak function of speed.
  • the traction coefficient often improves with increasing temperature until a point at which the traction coefficient rapidly degrades.
  • creep As used herein, “creep”, “ratio droop”, or “slip” is the discrete local motion of a body relative to another and is exemplified by the relative velocities of rolling contact components such as the mechanism described herein.
  • traction drives the transfer of power from a driving element to a driven element via a traction interface requires creep.
  • creep in the direction of power transfer is referred to as “creep in the rolling direction.”
  • the driving and driven elements experience creep in a direction orthogonal to the power transfer direction, in such a case this component of creep is referred to as "transverse creep.”
  • the terms "prime mover”, “engine,” and like terms, are used herein to indicate a power source.
  • Said power source could be fueled by energy sources having hydrocarbon, electrical, biomass, solar, geothermal, hydraulic, pneumatic, and/or wind to name but a few.
  • energy sources having hydrocarbon, electrical, biomass, solar, geothermal, hydraulic, pneumatic, and/or wind to name but a few.
  • various illustrative logical blocks, modules, and circuits described in connection with the embodiments disclosed herein could be implemented or performed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor could be a microprocessor, but in the alternative, the processor could be any conventional processor, controller, microcontroller, or state machine.
  • a processor could also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • Software associated with such modules could reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD- ROM, or any other suitable form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such the processor reads information from, and write information to, the storage medium. In the alternative, the storage medium could be integral to the processor.
  • the processor and the storage medium could reside in an ASIC.
  • a controller for use of control of the IVT comprises a processor (not shown).
  • a transmission controller 100 includes an input signal processing module 102, a transmission control module 104 and an output signal processing module 106.
  • the input signal processing module 102 is configured to receive a number of electronic signals from sensors provided on the vehicle and/or transmission.
  • the sensors optionally include temperature sensors, speed sensors, position sensors, among others.
  • the signal processing module 102 optionally includes various sub-modules to perform routines such as signal acquisition, signal arbitration, or other known methods for signal processing.
  • the output signal processing module 106 is optionally configured to
  • the output signal processing module 106 is configured to transmit commanded signals to actuators based on target values determined in the transmission control module 104.
  • the transmission control module 104 optionally includes a variety of sub-modules or sub-routines for controlling continuously variable transmissions of the type discussed here.
  • the transmission control module 104 optionally includes a clutch control sub-module 108 that is programmed to execute control over clutches or similar devices within the transmission.
  • the clutch control sub-module 108 implements state machine control for the coordination of engagement of clutches or similar devices.
  • the transmission control module 104 optionally includes a CVP control sub-module 110 programmed to execute a variety of measurements and determine target operating conditions of the CVP, for example, of the ball- type continuously variable transmissions discussed here. It should be noted that the CVP control sub-module 110 optionally incorporates a number of sub- modules for performing measurements and control of the CVP. One sub- module included in the CVP control sub-module 110 is described herein.
  • the CVP control sub- module 110 is configured to implement a cam hop detection process 120.
  • the cam hop detection process 120 begins at a start state 121 and proceeds to a block 122 where a number of signals are received.
  • the signals include an input speed signal, an output speed signal, an input torque signal, and a CVP ratio signal. It should be appreciated that the signals are optionally configured to be provided by measurements from electronic sensors, or calculated or inferred from other measured signals.
  • the cam hop detection process 120 proceeds to a block 123 where a speed error is computed. In some embodiments, the speed error is calculated by multiplying the first (i.e. input) traction ring speed by the commanded ratio and subtracting the result from the second (i.e.
  • the cam hop detection process 120 proceeds to a first evaluation block 124 where the speed error determined in the block 123 is compared to a threshold value.
  • the threshold value is a calibratable variable stored in memory. The threshold value is representative of an upper limit of speed error between the first traction ring and the second traction ring. If the first evaluation block 124 returns a false result, the cam hop detection process 120 proceeds to the block 122. If the first evaluation block 124 returns a true result, the cam hop detection process 120 proceeds to a block 125 where cutoff frequencies for a bandpass filter are determined. In some embodiments, the frequency of a cam hop event is a function of the number of cam balls and ramps in the device.
  • the cam hop frequency is the inverse of the equation 60/(speed error*number_of_balls), where the speed error is the result of the block 123 and "number_of_balls" equals the number of cam balls.
  • the cam hop frequency is the inverse of the elapsed time between cam hop events.
  • the cam hop frequency is the basis for forming the upper and lower bandpass filter cutoff frequencies. It should be appreciated that the upper and lower bandpass cutoff frequencies are tunable to achieve desired operation.
  • the cam hop detection process 120 proceeds to a block 126 where a bandpass filter, or other well-known means of determining a signal magnitude at a specific frequency is applied to the speed error signal determined in the block 23.
  • the cam hop detection process 120 proceeds to a block 127 where a magnitude at a target frequency is determined in order to set criteria for cam hop detection.
  • the cam hop detection process 120 proceeds to a second evaluation block 128 where the results of the bandpass filter in the block 126 are compared to the cam hop detection criteria
  • the cam hop detection process 120 proceeds to the block 122. If the second evaluation block 128 returns a false result, the cam hop detection process 120 proceeds to the block 122. If the second evaluation block 128 returns a true result, the cam hop detection process 120 proceeds to a block 129 where a cam hop fault signal is set as true. In some embodiments, the cam hop fault signal is sent to other modules and/or processes in the control system 100.
  • the cam hop detection process 120 proceeds to a block 130 where mitigation commands are determined. In some embodiments, mitigation commands to reduce input torque to the CVP are formed in order to stop the cam hop event. In some embodiments, mitigation commands to change the ratio of the CVP are formed in order to stop the cam hop event. Because cam hop will occur on the ring with the highest torque, a CVP ratio shift from underdrive toward unity will balance the ring torques and reduce the peak torque on the system, thus serving to stop the cam hop event. The cam hop detection process 120 proceeds to the block 122.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Transmission Device (AREA)

Abstract

La présente invention concerne un système de commande pour une transmission à variation continue à modes multiples possédant un variateur planétaire du type à billes. Le système de commande possède un module de commande de transmission conçu pour recevoir une pluralité de signaux électroniques d'entrée, et pour déterminer un mode de fonctionnement à partir d'une pluralité de plages de commande sur la base, au moins en partie, de la pluralité de signaux électroniques d'entrée. Le module de commande de transmission comprend un module de commande CVP. Le module de commande CVP est conçu pour mettre en œuvre un processus de détection de saut de came. Le processus de détection de saut de came est conçu pour évaluer des signaux électroniques d'entrée et déterminer si un mécanisme générateur de force axiale de rampe de came fonctionne dans un état dans lequel les rouleaux de came roulent sur la rampe de came.
PCT/US2017/041833 2016-07-14 2017-07-13 Procédé de détection du saut de came dans une transmission à variation continue planétaire du type à billes Ceased WO2018013750A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201662362465P 2016-07-14 2016-07-14
US62/362,465 2016-07-14

Publications (1)

Publication Number Publication Date
WO2018013750A1 true WO2018013750A1 (fr) 2018-01-18

Family

ID=59388189

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2017/041833 Ceased WO2018013750A1 (fr) 2016-07-14 2017-07-13 Procédé de détection du saut de came dans une transmission à variation continue planétaire du type à billes

Country Status (1)

Country Link
WO (1) WO2018013750A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4463620A (en) * 1982-09-07 1984-08-07 Excelermatic Inc. Infinitely variable traction roller transmission
GB2330186A (en) * 1997-08-06 1999-04-14 Luk Getriebe Systeme Gmbh Clutch actuator having a modular construction
US8469856B2 (en) 2008-08-26 2013-06-25 Fallbrook Intellectual Property Company Llc Continuously variable transmission
US8870711B2 (en) 2008-10-14 2014-10-28 Fallbrook Intellectual Property Company Llc Continuously variable transmission
WO2015073948A2 (fr) * 2013-11-18 2015-05-21 Dana Limited Mécanisme de commande et de détection de pic de couple d'un cvp
US20150226299A1 (en) * 2012-09-07 2015-08-13 Dana Limited Ball type cvt/ivt including planetary gear sets
WO2016182838A1 (fr) * 2015-05-08 2016-11-17 Dana Limited Procédé de commande pour changement de vitesse synchrone d'une transmission comprenant un mécanisme planétaire à variation continue

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4463620A (en) * 1982-09-07 1984-08-07 Excelermatic Inc. Infinitely variable traction roller transmission
GB2330186A (en) * 1997-08-06 1999-04-14 Luk Getriebe Systeme Gmbh Clutch actuator having a modular construction
US8469856B2 (en) 2008-08-26 2013-06-25 Fallbrook Intellectual Property Company Llc Continuously variable transmission
US8870711B2 (en) 2008-10-14 2014-10-28 Fallbrook Intellectual Property Company Llc Continuously variable transmission
US20150226299A1 (en) * 2012-09-07 2015-08-13 Dana Limited Ball type cvt/ivt including planetary gear sets
WO2015073948A2 (fr) * 2013-11-18 2015-05-21 Dana Limited Mécanisme de commande et de détection de pic de couple d'un cvp
WO2016182838A1 (fr) * 2015-05-08 2016-11-17 Dana Limited Procédé de commande pour changement de vitesse synchrone d'une transmission comprenant un mécanisme planétaire à variation continue

Similar Documents

Publication Publication Date Title
US10030594B2 (en) Abuse mode torque limiting control method for a ball-type continuously variable transmission
RU2618553C2 (ru) Прогрессивные трансмиссии, бесступенчатые трансмиссии, способы, узлы, подузлы и их компоненты
US20180363777A1 (en) A method of making a synchronous shift between two modes of a mutli-mode continously variable transmission
US20170082193A1 (en) Simulated stepped gear ratio control method for a ball-type continuously variable transmission
US20180328473A1 (en) Fixed Mode Clutch Control Methods For A Multi-Mode Ball-Type Continuously Variable Transmission
US20190063602A1 (en) Control Method For Torque Vectoring Using A Ball-Type Continuously Variable Transmission
US20180187774A1 (en) Method For Vehicle Control During Off-Road Operation Using A Ball Planetary Type Continuously Variable Transmission
US20190040951A1 (en) Method for slip avoidance in a ball planetary type continuously variable transmission
US20180186358A1 (en) Method For Control Of A Ball Planetary Type Continuously Variable Transmission Using Fuzzy Logic
US20190154147A1 (en) Non-synchronous shift control method and assemblies for continuously variable transmissions
US20190017597A1 (en) Control Methods For Heat Recovery In A Ball-Type Continuously Variable Transmission
WO2018013750A1 (fr) Procédé de détection du saut de came dans une transmission à variation continue planétaire du type à billes
US20180187619A1 (en) Method For Vehicle Launch Control Using A Ball Planetary Type Continuously Variable Transmission
US20190063588A1 (en) Control Methods During Over Temperature Operation Of A Ball-Type Continuously Variable Transmission
US20180187624A1 (en) Method For Control Of A Ball Planetary Type Continuously Variable Transmission During Engine Braking
US20180335137A1 (en) Control Method For A Ball-Type CVT At Unity Speed Ratio
WO2018085538A1 (fr) Procédé de commande d'une transmission à variation continue de type planétaire à billes permettant d'allonger la durée de désactivation de cylindres
US20190136969A1 (en) Control method for prediction, detection, and compensation of torque reversal during synchronous shifting of a ball-type continuously variable planetary
US20170227123A1 (en) Method for Adaptive Ratio Control and Diagnostics in a Ball Planetary Type Continously Variable Transmission
US20170227122A1 (en) Method for Adaptive Ratio Control in a Ball Planetary Continously Variable Transmission
WO2018128829A1 (fr) Procédé de diagnostic de commande d'un entraînement à variation continue ayant une transmission à variation continue de type planétaire à billes
US20190031181A1 (en) Control Methods For An Electric Vehicle Equipped With A Ball-Type Continuously Variable Transmission
US20180335136A1 (en) Shift Actuator Assemblies And Control Methods For A Ball-Type Continuously Variable Planetary Transmission
WO2018129444A1 (fr) Procédés de changement de mode non synchrone multi-mode pour transmission planétaire de type à billes
WO2018160360A1 (fr) Procédés de commande de changement de vitesse annulé et de changement de vitesse de transition pour une transmission à variation continue du type à billes à modes multiples

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17743164

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17743164

Country of ref document: EP

Kind code of ref document: A1