CN106460964A - Method for reducing drag torque of friction clutch on demand - Google Patents

Method for reducing drag torque of friction clutch on demand Download PDF

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Publication number
CN106460964A
CN106460964A CN201580028868.5A CN201580028868A CN106460964A CN 106460964 A CN106460964 A CN 106460964A CN 201580028868 A CN201580028868 A CN 201580028868A CN 106460964 A CN106460964 A CN 106460964A
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CN
China
Prior art keywords
friction clutch
clutch
trailing moment
gearratio
state
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Application number
CN201580028868.5A
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Chinese (zh)
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CN106460964B (en
Inventor
洛亚尔·乔治·马克米利安
塞巴斯蒂安·施瓦茨
弗兰克·施滕格尔
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Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
    • 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
    • F16H61/02—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 characterised by the signals used
    • F16H61/0202—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 characterised by the signals used the signals being electric
    • F16H61/0204—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 characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/104—Clutch
    • F16D2500/10406—Clutch position
    • F16D2500/10412—Transmission line of a vehicle
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/104—Clutch
    • F16D2500/10443—Clutch type
    • F16D2500/1045—Friction clutch
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/302—Signal inputs from the actuator
    • F16D2500/3026—Stroke
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/304—Signal inputs from the clutch
    • F16D2500/30403—Number of clutch actuations
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/304—Signal inputs from the clutch
    • F16D2500/30404—Clutch temperature
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/304—Signal inputs from the clutch
    • F16D2500/3041—Signal inputs from the clutch from the input shaft
    • F16D2500/30412—Torque of the input shaft
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/304—Signal inputs from the clutch
    • F16D2500/3042—Signal inputs from the clutch from the output shaft
    • F16D2500/30421—Torque of the output shaft
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/305—Signal inputs from the clutch cooling
    • F16D2500/3055—Cooling oil properties
    • F16D2500/3056—Cooling oil temperature
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/502—Relating the clutch
    • F16D2500/5023—Determination of the clutch wear
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/502—Relating the clutch
    • F16D2500/50287—Torque control
    • F16D2500/5029—Reducing drag torque

Landscapes

  • 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)
  • Mechanical Operated Clutches (AREA)

Abstract

A method for on-demand reduction of the drag torque of a friction clutch of a motor vehicle during a gear ratio change, the friction clutch being automatically manoeuvrable between an open position and a closed position, the friction clutch being in particular wet, wherein a drag torque status is first determined (304) and subsequently it is determined whether the requested gear ratio change can be performed without reducing the drag torque or whether the drag torque needs to be reduced, depending on a gear ratio change requirement (302).

Description

Method for reducing the trailing moment of friction clutch on demand
Technical field
The present invention relates to a kind of for changing in gearratio during reduce on demand motor vehicles friction clutch towing The method of moment, described friction clutch automatically can manipulate between open position and closing position, described friction clutch Especially wet type.
Background technology
Known a kind of side of the wet friction clutch for controlling motor vehicles from DE 10 2,013 205 107 A1 Method, described friction clutch can manipulate between open position and closing position, and friction clutch has counter, with respect to anti- Pressing plate and the clutch disk that can clamp between counter and pressing plate that pressing plate is axially movable, are wherein based on clutch characteristics bent Line traffic control friction clutch, wherein determines clutch trailing moment characteristic curve and by itself and clutch characteristics curve combining, To obtain the clutch characteristics curve revised.
Content of the invention
The present invention is based on following purposes：Improve the method being initially mentioned, especially should be able to realize fully subtracting of trailing moment Little.Especially, the quick reduction of trailing moment should be able to be realized.Especially, should it is unnecessary to reduce trailing moment and convey on one's own initiative Energy.Especially, should avoid disconnecting friction clutch as far as possible.Especially, shift time and gear shifting force should be reduced when gearratio changes, Or shift time and gear shifting force independently keep constant with temperature impact.Especially, driver comfort should be improved.
Described purpose by a kind of for changing in gearratio during reduce on demand friction clutch trailing moment side Method is realized, and wherein said friction clutch automatically can manipulate between open position and closing position, described friction clutch Especially wet type, wherein changes according to gearratio and requires, it is first determined trailing moment state, and it is later determined that, can be Execute required gearratio change in the case of not reducing trailing moment, or need to reduce trailing moment.
Friction clutch can be a part for friction clutch device.Friction clutch can form single clutch.Rub Wipe clutch and can form double clutch with another friction clutch.Friction clutch can be single plate clutch.Rub from Clutch can be multiplate clutch.Friction clutch can have counter, the pressing plate being axially movable with respect to counter and Can clamp between counter and pressing plate and the clutch disk of power is transmitted with frictional fit.Friction clutch can have input Part and output par, c.Counter and pressing plate can belong to importation.Clutch disk can belong to output par, c.
The friction clutch of wet type can be following friction clutches, and described friction clutch is loaded by liquid flow.Liquid Stream can be used particularly for cooling down friction clutch.Liquid can be oil.Liquid can be transmission oil.Trailing moment can rub Occur in the case of wiping clutch is inc.Trailing moment can be caused by the power transmission depending on liquid.Trailing moment Can be related to the specific characteristic of liquid, viscosity and/or temperature.Trailing moment can be with the frame mode phase of cooling circuit Close, especially related to the position of cooling oil pump and version.Trailing moment can be with clutch disk away from counter and/or pressing plate Distance related.
Friction clutch can be used in the PWTN be arranged on motor vehicles.PWTN can have internal combustion Machine.PWTN can have speed changer.Speed changer can be manual transmission.Speed changer can manually and/or from Shift gears dynamicly.Friction clutch can be arranged between internal combustion engine and speed changer in PWTN.Friction clutch defeated Entering part can be can drive connection with the output shaft of internal combustion engine.The output par, c of friction clutch can be and speed changer Input shaft can drive connection.Term " importation " and " output par, c " and the power flow directional correlation by internal combustion engine.
Friction clutch can transmit according to manipulating the power starting to realize increasing from the actuated position being fully disconnected, until Of completely closed actuated position, in the described actuated position being fully disconnected, between importation and output par, c substantially Do not carry out power transmission, in described of completely closed actuated position, be basically carried out between importation and output par, c Complete power transmission, is carried out to the power transmission frictional fit wherein between importation and output par, c.On the contrary, energy Enough power transmission being started from of completely closed actuated position according to manipulation to realize reducing, until the actuated position being fully disconnected, In described of completely closed actuated position, it is basically carried out complete power transmission between importation and output par, c, In the described actuated position being fully disconnected, substantially do not carry out power transmission between importation and output par, c.
Friction clutch device can have performs device.Friction clutch can be by mean of performs device and can manipulate 's.Performs device can be hydrostatic performs device.Performs device can be used in partly hydraulically controlling friction clutch.Execution Device can have hydraulic line.Performs device can have slave cylinder.Performs device can have active cylinder.Active cylinder can For loading friction clutch.Hydraulic line can be used in the power transmission between active cylinder and slave cylinder.Performs device can There is motor driver.Driver can be used in loading slave cylinder.Performs device can have transmission mechanism.
Friction clutch device can have control device.Control device can be local controls.Control device energy It is enough higher level's control device.Control device can be used in controlling or regulates and controls friction clutch device, friction clutch, performs device And/or the motor driver of performs device.The method according to the invention can be executed by means of control device.Control device can There is controller for electric consumption.Control device can have storage device.Storage device can have non-volatile electronic memory, The information that described electronic memory is stored to be electrically eliminated or can be capped.Control device can have electrically erasable can Program read-only memory (EEPROM).Actuation means can have computing device.
Friction clutch device can have the sensor of the adjustment position for determining friction clutch device.Described biography Sensor can be position sensor.Described sensor can be used in determining the adjustment position of friction clutch.Described sensor energy It is enough in the adjustment position determining performs device.Friction clutch device can have the sensing of the moment for determining transmission Device.Described sensor can be torque sensor.Friction clutch device can have the slippage for determining friction clutch Sensor.Slippage can be the speed discrepancy between the importation of friction clutch and output par, c.Friction clutch device Can have the sensor for determining liquid flow.Friction clutch device can have for the determination especially temperature of liquid Sensor.
Can consider determined by, for example measured trailing moment, clutch temp, coolant temperature, from one Individual run pause start the energy input in friction clutch, from upper one run pause start clutch control time Under conditions of the manipulation skew being caused by abrasion of number and/or simulation, determine trailing moment state.
In order to determine trailing moment state, based on clutch that is measuring in the new state of friction clutch or calculating Device characteristic curve, can determine touch points.Can store in the storage device or clutch characteristics curve can be stored.Clutch is special Linearity curve relatively can illustrate by rubbing with friction clutch device, friction clutch or performs device adjustment position The moment of clutch transmission.Clutch characteristics curve can illustrate in the graph, in described chart, draws friction in x-axis Clutch apparatus, friction clutch or performs device adjustment position, and draw the moment of transmission on the y axis.Touching Point can describe friction clutch device, friction clutch and/or performs device adjustment position, in described adjustment position In from the manipulation that starts of actuated position disconnecting, friction clutch starts to transmit moment towards the actuated position of closure.Touch Touch and a little can describe friction clutch device, friction clutch and/or performs device adjustment position, in described adjustment position Put the predetermined moment of middle friction clutch transmission.Predetermined moment can be about for example 2 to 3Nm.Herein, term " touches Touch a little " can not only represent touch points itself but also also illustrate that friction clutch device, friction clutch and/or execution The adjustment position related to touch points of device.Friction clutch device, friction clutch and/or performs device with touch Touch a related adjustment position can store in the storage device.
Can determine the stroke between cut-off point and touch points, and stroke value can be stored.Cut-off point can be following Point, at described point, performs device just starts transmission power or pressure when along disconnection directional control friction clutch.Stroke value Can be stored in control device.Stroke value can be at least approximate unrelated with abrasion.The value of cut-off point can consider friction from It is adjusted under conditions of clutch state of wear.In order to adjust the value of cut-off point, can be by stroke value from the touching being related to abrasion Point value deducts.Determining whether to execute required gearratio change in the case of not reducing trailing moment, or need to subtract During little trailing moment, it can be considered that required gearratio.Trailing moment state can or be defined as high, or is defined as Low.Trailing moment state can divide two hierarchically to determine.In order to trailing moment state is defined as high or low, Neng Goukao Consider default boundary value.High trailing moment state can be associated with high necessary gear shifting force.Low trailing moment state energy Enough it is associated with low necessary gear shifting force.
When trailing moment state is defined as low and/or when required gearratio is big gear, required transmission Can directly initiate than change.Big gear can be associated with high necessary gear shifting force.Little gear can be with low necessity Gear shifting force is associated.When trailing moment state is defined as high and/or requirement gearratio and is little gear, can break first Open friction clutch, and the gearratio change required by subsequent start-up.Friction clutch can disconnect up to its open position. With regard to new state or consider state of wear in the case of adjust open position value.The open position of clutch system can lead to Cross and be in executing agency's (volume compensation guaranteeing in storage container) of ventilation position, by clutch or performs device Mechanical property (such as backstop or sticking department) and/or limited by (if necessary also have adaptation) alliance of study.
By " can " especially represent the present invention optional feature.Therefore, embodiments of the invention are respectively obtained, described Embodiment has a corresponding feature or multiple features accordingly.
The method according to the invention is capable of sufficiently reducing trailing moment.It is capable of rapidly reducing drag Square.Effective energy conveying for reducing trailing moment is dispensable.Disconnect friction clutch only to carry out when needed.? The shift time of transmission ratio reduces.Driver comfort improves.
Brief description
Below with reference to the accompanying drawings embodiments of the invention are described in detail.Other feature and advantage are drawn from this description.Described The specific features of embodiment can be the universals of the present invention.The feature with other feature associations of described embodiment also can Independent feature for the present invention.
Schematically and be exemplarily illustrated：
Fig. 1 illustrates the chart with the clutch characteristics curve in the new state of friction clutch,
Fig. 2 illustrates the chart with the clutch characteristics curve in the state of wear of friction clutch, and
Fig. 3 illustrates the chart of the trailing moment for reducing friction clutch on demand.
Specific embodiment
Fig. 1 illustrates the chart 100 with the clutch characteristics curve 102 in the new state of friction clutch.Rub from Clutch has counter, the pressing plate being axially movable with respect to counter and can be for frictional fit between counter and pressing plate Transmission power and the clutch disk that clamps.Friction clutch has importation and output par, c.Counter and pressing plate belong to Importation.Clutch disk belongs to output par, c.Friction clutch automatically can be grasped by means of performs device and controller for electric consumption Vertical.Friction clutch is used for being arranged between internal combustion engine and manual transmission in the PWTN of motor vehicles, described changes Shift transmission has gearratio.Friction clutch is the wet clutch running in oil.
In chart 100, draw control run s and clutch torque M related to control run s.In axle intersection point, behaviour Stringer journey s=0, and friction clutch is fully disconnected.In described position, one side counter and pressing plate and on the other hand Clutch disk is spaced apart from each other and is joined so that directly not rubbing between the importation of friction clutch and output par, c The power transmission closed.Certainly, due to oil present in friction clutch, in the friction clutch being fully disconnected, also due to Liquid and little trailing moment occurs.Trailing moment is for example temperature dependent with oily viscosity.
From the beginning of the completely open position 104 of friction clutch, under friction clutch passes through with the increase of control run s Mode of stating manipulates towards closing direction：Pressing plate moves towards counter.After control run 106, at touch points 108 Start the power transmission of the direct frictional fit between the importation of friction clutch and output par, c.Trailing moment also with Clutch disk is related to the distance of counter and pressing plate.Therefore, directly do not rub between importation and output par, c In the case of the power transmission of cooperation, increase with control run s, through control run 106, trailing moment is reaching touch points Had built up before 108.
When friction clutch starts the edge directional control contrary with closing direction from completely open position 104, up to To ventilation position 110, in described ventilation position, the hydraulic line of performs device is connected with compensating container, so as to realizing Pressure/volume compensation.
Fig. 2 illustrates the chart 200 with the clutch characteristics curve 202 in the state of wear of friction clutch.In mill In damage state, due to abrasion it is necessary to through bigger control run s until reach touch points 204.Complete from friction clutch Open position 206 starts, and due to friction, first passes around following strokes up to cut-off point 208, on described stroke, although manipulating Stroke s increases, and trailing moment does not improve.The trailing moment reducing and causing due to the spacing of clutch disk and counter and pressing plate Improve and occur first in control run section 210, described control run section 210 is from the beginning of exceeding cut-off point 208.From exceeding touching Point 204, starts to carry out the power transmission of direct frictional fit between the importation of friction clutch and output par, c. In state of wear, the length of control run section 210 corresponds roughly to the length according to the control run 106 in the new state of Fig. 1 Degree.In addition, remaining is specifically referring to Fig. 1 and associated description.
Fig. 3 illustrates the chart 300 of the trailing moment for reducing friction clutch on demand.The performs device of friction clutch Controlled by means of control device.Carry out in control device by the flow process shown in chart 300.
Determine under conditions of considering the requirement 302 of transmission ratio in the transmission and trailing moment state 304：Can Execute required gearratio change in the case of not reducing trailing moment, or need to reduce trailing moment.
When the gearratio that trailing moment state 304 is low and required is big gear, within step 306 directly Start required gearratio change.When the gearratio that trailing moment state 304 is high and/or required is little gear When, disconnect friction clutch, and the gearratio change required by subsequent start-up first in step 308.
Subsequently, according to trailing moment state 304, or directly execution gearratio change in the step 310, or exist first Move towards touch points in step 312 and subsequently execution gearratio change.
Reference numerals list：
100 charts
Clutch characteristics curve in 102 new states
104 completely open positions
106 control runs
108 touch points
110 ventilation positions
200 charts
Clutch characteristics curve in 202 state of wear
204 touch points
206 completely open positions
208 cut-off points
210 control run sections
300 charts
302 gearratio changes require
304 trailing moment states
306 steps
308 steps
310 steps
312 steps

Claims (10)

1. a kind of for changing in gearratio during reduce on demand motor vehicles the trailing moment of friction clutch method, its Described in friction clutch automatically can manipulate between open position and closing position, described friction clutch is especially wet Formula,
It is characterized in that,
(302) are required according to gearratio change, it is first determined trailing moment state (304), and it is later determined that：Can not subtract Execute required described gearratio change in the case of little trailing moment, or need to reduce trailing moment.
2. method according to claim 1,
It is characterized in that,
Consider measured trailing moment, clutch temp, coolant temperature, from an operation pause play described rub from Energy input in clutch, the number of times of clutch control and/or the manipulation being caused by abrasion of simulation from upper runs and pauses Under conditions of skew, determine described trailing moment state (304).
3. according at least one described method in the claims,
It is characterized in that,
In order to determine trailing moment state (304), based on measuring in the new state of described friction clutch or calculate Clutch characteristics curve (102) determine touch points (108).
4. method according to claim 3,
It is characterized in that,
Determine the stroke (106) between cut-off point (104) and described touch points (108), and store stroke value.
5. method according to claim 4,
It is characterized in that,
Under conditions of the state of wear considering described friction clutch, adjust the value of described cut-off point (208).
6. according at least one described method in claim 4 to 5,
It is characterized in that,
In order to adjust the value of described cut-off point (208), from the touching point value (204) being related to wear and tear, deduct described stroke value (106,210).
7. according at least one described method in the claims,
It is characterized in that,
Determining whether to execute required gearratio change in the case of not reducing trailing moment or needing to reduce towing It is considered to required gearratio during moment.
8. according at least one described method in the claims,
It is characterized in that,
Described trailing moment state (304) is defined as high or low.
9. according at least one described method in claim 7 to 8,
It is characterized in that,
When described trailing moment state (304) being defined as low and/or required gearratio being big gear, directly open Dynamic required gearratio change.
10. according at least one described method in claim 7 to 9,
It is characterized in that,
When described trailing moment state (304) being defined as high and/or required gearratio being little gear, disconnected first Open described friction clutch, and the gearratio change required by subsequent start-up.
CN201580028868.5A 2014-06-03 2015-05-18 Method for reducing drag torque of friction clutch on demand Active CN106460964B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102014210395 2014-06-03
DE102014210395.9 2014-06-03
PCT/DE2015/200314 WO2015185050A1 (en) 2014-06-03 2015-05-18 Method for reducing, if required, a drag torque of a friction clutch

Publications (2)

Publication Number Publication Date
CN106460964A true CN106460964A (en) 2017-02-22
CN106460964B CN106460964B (en) 2018-12-14

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Application Number Title Priority Date Filing Date
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KR (1) KR102472609B1 (en)
CN (1) CN106460964B (en)
DE (1) DE112015002627A5 (en)
WO (1) WO2015185050A1 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN114254440A (en) * 2021-12-29 2022-03-29 武汉科技大学 Method for optimizing groove-shaped line on surface of friction plate of wet clutch

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112380673B (en) * 2020-10-22 2024-07-09 广州汽车集团股份有限公司 Transmission efficiency optimization method and device for speed changer

Citations (4)

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Publication number Priority date Publication date Assignee Title
DE102004035262A1 (en) * 2004-07-21 2006-02-16 Zf Friedrichshafen Ag Automatic transmission for controlling speed ratios between input shaft and output shaft of clutch of motor vehicle has transmission mechanism mounted on hollow shaft for air regulation to get absolute figure of number of revolutions
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