CN108331856A - Method for adapting a contact point of a friction clutch - Google Patents

Method for adapting a contact point of a friction clutch Download PDF

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Publication number
CN108331856A
CN108331856A CN201810036416.7A CN201810036416A CN108331856A CN 108331856 A CN108331856 A CN 108331856A CN 201810036416 A CN201810036416 A CN 201810036416A CN 108331856 A CN108331856 A CN 108331856A
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CN
China
Prior art keywords
clutch
region
friction clutch
pressure signal
reference pressure
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Granted
Application number
CN201810036416.7A
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Chinese (zh)
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CN108331856B (en
Inventor
乔治·格佩特
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Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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Publication of CN108331856A publication Critical patent/CN108331856A/en
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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
    • F16D48/02—Control by 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
    • 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
    • F16D48/08—Regulating clutch take-up on starting
    • 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
    • F16D48/02—Control by fluid pressure
    • F16D2048/0257—Hydraulic circuit layouts, i.e. details of hydraulic circuit elements or the arrangement thereof
    • 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
    • F16D2500/102—Actuator
    • F16D2500/1026—Hydraulic
    • 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
    • F16D2500/3027—Torque
    • 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
    • F16D2500/50236—Adaptations of the clutch characteristics, e.g. curve clutch capacity torque - clutch actuator displacement
    • 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
    • F16D2500/50245—Calibration or recalibration of the clutch touch-point
    • F16D2500/50251—During operation
    • F16D2500/50257—During a creep operation
    • 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
    • F16D2500/70—Details about the implementation of the control system
    • F16D2500/702—Look-up tables
    • F16D2500/70205—Clutch actuator
    • 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
    • F16D2500/70—Details about the implementation of the control system
    • F16D2500/702—Look-up tables
    • F16D2500/70205—Clutch actuator
    • F16D2500/70217—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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/70—Details about the implementation of the control system
    • F16D2500/702—Look-up tables
    • F16D2500/70205—Clutch actuator
    • F16D2500/70235—Displacement
    • 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
    • F16D2500/70—Details about the implementation of the control system
    • F16D2500/704—Output parameters from the control unit; Target parameters to be controlled
    • F16D2500/70402—Actuator parameters
    • F16D2500/70406—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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/70—Details about the implementation of the control system
    • F16D2500/704—Output parameters from the control unit; Target parameters to be controlled
    • F16D2500/70402—Actuator parameters
    • F16D2500/70408—Torque

Landscapes

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

Abstract

The invention relates to a method for adapting the contact points of a friction clutch, which is driven by a hydrostatic actuator (3) in an automated clutch actuating system (1), wherein the contact points according to a pressure/stroke characteristic curve are adapted by means of a pressure (p), whereby a clamping force/stroke relationship is determined which is dependent on a transmitted clutch torque (T). A method for enabling a smooth starting process to be designed, wherein a reliably detectable reference pressure signal (D) is generated in a region (B) preceding a clamping region (C) of the friction clutch (9) and including the play of the friction clutch (9), and after detection of the reference pressure signal (D), the contact points are adapted in the region (B) including the play of the friction clutch (9) without monitoring the clutch torque (T).

Description

Method for the contact point for being adapted to friction clutch
Technical field
The present invention relates to a kind of methods for being adapted to the contact point of friction clutch, and the friction clutch is in automation By the actuator driven of hydrostatic in clutch system, wherein be adapted to according to pressure-stroke-characteristic curve institute by pressure The contact point obtained, the relevant clamping force-stroke-relationship of clutch torque for thereby determining that and being transmitted.
Background technology
In the clutch system of the automation of the actuator with hydrostatic, in addition to estimation clutch torque it Outside, it is the important information source that can significantly improve torque accuracy as the pressure of direct measured value in hydraulic system. For the clutch directly operated, using pressure or the clamping pressure or clamping force characteristic curve of estimation, directly to pass through Friction coefficient determines clutch torque.The clutch directly operated refers to such clutch, wherein eliminate for changing from The lever-type sender of the pre-terminated of the gear ratio of clutch.
A kind of method for being adapted to the parameter of clutch as known to 10 2,012 204 940 A1 of DE, in the method, There is the clutch actuator of the hydrostatic with pressure transducer in motor vehicle.In the method especially by pressure signal It calculates contact point and is adapted to.In this case, clutch control includes the stroke of hydrostatic and is calculated by adaptation Method is controlled.The slow variation of pressure-stroke-lag and clamping pressure-or clamping force-characteristic curve pass through prison in principle Survey device detection.Meanwhile contact point is relatively quickly adapted to by the characteristic offset of stroke-pressure-.In this case, This is completed by directly comparing the measurement result of pressure curve and pressure transducer.For the clutch directly operated, Clutch torque is determined by the force characteristic curve and friction coefficient of estimation.In view of these factors are wanted from following two points Contact point between two kinds of adaptation stages only slightly changes or can be learnt in sufficiently small clutch torque Contact point, thus driver can't discover the adaptation carried out to relatively large deviation.
Especially when using hydrostatic actuator, hydrostatic stroke can be apparent in one minute bias internal one Amount.This detection only carries out in the region with clamping force of clutch, its shortcoming is that, adaptation is completed too late, so that In when it is characteristic offset already exceed to a certain degree when, it cannot be guaranteed that the steady or instant start of motor vehicle or slow-action Journey.Thus driver perceives moment variations.
According to herein, the clamping force of clutch should instigate herein the pressing plate of clutch sticks on clutch disk and can The power of clutch torque is transmitted by ground.In the area, the pressure condition of clutch system can not be monitored, thus in the region In can not obtain contact point.For this reason, the pressure in clutch system usually passes through detection process (Schn ü Ffelvorgang it) compensates, this can result in traveling loss again, this is because can not use clutch within the regular hour Device.
Invention content
The technical problem to be solved by the invention is to provide it is a kind of for be adapted to friction clutch contact point method, Wherein, even if obtaining reliable characteristic curve offset if during the starting of motor vehicle or slow-action.
According to the present invention, which solves in this way：It is before the clamping region of friction clutch including rub It wipes and generates reference pressure signal in the region in the gap of clutch, and after detecting reference pressure signal, do not monitoring Butt contact is adapted in this region in the case of clutch torque.It is using the advantages of reference pressure signal, energy Enough butt contacts in the region before the clamping region of friction clutch are adapted to, this makes the steady and instantaneous of motor vehicle Starting be guaranteed.
Advantageously, the reference pressure signal that can reliably measure is more than to go out in the region in the gap including friction clutch Existing interference signal.Because signal-to-noise ratio is not ideal enough in the region including gap, thus so far do not dock in this region Contact is adapted to.Only introduce reference pressure signal butt contact can be adapted in this region.
In a kind of design scheme, reference pressure signal and the pressure that occurs in the clamping region of friction clutch are at connecing Nearly constant ratio.According to this constant ratio, the offset of contact point highly significant can be obtained, this is not particularly with almost having Have abrasion and disc spring the nearly constant wet clutch of pressure excursion is particularly advantageous.
In a kind of variant scheme, the structural detail in the gap of friction clutch is for generating reference pressure signal. The structural detail makes setting relative to clamping by clutch case backstop in the region including gap of friction clutch The constant stroke offset of force curve.
In one embodiment, the structural detail being fixedly connected with clutch in side has relative in friction clutch The characteristic stroke offset of clamping force occurred in the clamping region of device.It therefore ensures that, it can need not determine torque It is enough to be reliably adapted to contact point.
In one embodiment, it in the region in the gap including friction clutch, is formed and is deviated by constant stroke Determining detection zone, in this region contact point be adapted to.In this case, friction clutch includes the air gap Region be inherently divided into air section, the air section is adjacent with detection zone.In this case, it is connect for being adapted to The detection zone of contact is an immediately proceeding at before the clamping region of friction clutch, and the case where driver is detectable Under so that transition of the adaptation of contact point from the region including gap to clamping region is smooth.
In a kind of particularly simple design scheme, using spring element as construction component.This spring element itself It is deviated with constant stroke, the trip offset can simply be answered when being adapted to contact point in the region including gap With.
Advantageously, reference pressure signal has scheduled waveform (Signatur).It, can be in monitor by the waveform So that the detection of reference pressure signal and based on this contact point adaptation be simplified.
In a kind of design scheme, the predetermined waveform of reference pressure signal includes stairstepping.Stairstepping represents special Effective reference signal reliably detects to be monitored device.
In a kind of design scheme, the ladder of the waveform of reference pressure signal is generated by carrying out backstop to structural detail Shape.It by using the backstop to structural detail, is just adapted to earlier than clamping region enough, therefore in clutch non-operation When it is disconnected, driver cannot discover the contact of pressure ladder to lower or clutch.
Description of the drawings
The present invention has a large amount of embodiment.The diagram in conjunction with shown in elaborates plurality of embodiment.
Attached drawing is：
Fig. 1 is the schematic structure of the clutch actuation system of hydrostatic,
Fig. 2 is performed for the embodiment of measuring device according to the method for the present invention,
Fig. 3 is the schematic diagram of pressure-stroke characteristic curve of hydrostatic clutch actuation system,
Fig. 4 is the contact point offset in hydrostatic clutch actuation system or characteristic curve offset according to prior art Embodiment,
Fig. 5 is basic procedure according to the method for the present invention,
Fig. 6 is performed for friction clutch model according to the method for the present invention,
Fig. 7 is the embodiment of pressure-stroke characteristic curve according to the method for the present invention,
Fig. 8 is the second embodiment of pressure-stroke characteristic curve according to the method for the present invention.
Specific implementation mode
It schematically shows in Fig. 1 as used in a vehicle, the clutch with hydrostatic executes The structure of the clutch actuation system 1 of the hydrostatic of device 3.The clutch actuation system 1 of hydrostatic includes control static pressure type The controller 2 of clutch actuator 3.When the position change of clutch actuator 3, the piston 4 of master cylinder 5 is along actuator travel It moves right, wherein the volume in master cylinder 5 is changed and generates pressure p in master cylinder 5.Pressure p is by being used as pressure medium Hydraulic fluid 6 the secondary cylinder 8 of direct actuating friction clutch 9 is transmitted to via fluid pressure line 7.Friction clutch 9 is referred to as directly The clutch of operation is connect, this is because operation is carried out in the case where being not inserted into arm spring.In this case, liquid The pressure p of pressure fluid 6 causes stroke to change in secondary cylinder 8, and the trip variation acts in the operation of friction clutch 9.
In master cylinder 5 pressure p is determined by the pressure measurer 10 being connect with controller 2.Clutch actuator 3 is passed through Stroke s determined by stroke sensor 11.The stroke s that clutch actuator 3 is passed through also equates to the stroke of friction clutch 9.
In order to carry out contact point adaptation during the operation of the motor vehicle, common monitor 12 is given up in controller 2, it is this Monitor is connected in parallel (Fig. 2) with actual clutch actuation system 1.Monitor 12 includes simulation actual clutch operating system 1 model 13 according to control technology.Identical input variable, example are provided to actual clutch actuation system 1 and model 13 Such as stroke s, clutch actuator 3 is passed through stroke s in actuating friction clutch 9.By pressure measurer 10 in hydraulic pressure row Actually measured pressure p is measured in journeymess, wherein clutch torque TmessIt is determined by engine torque and rotating speed gradient.It measures Pressure pmessWith the clutch torque T obtained by operationmessThe pressure p described at operation node 14 and by model 13Modell With the clutch torque T obtained by 13 operations of modelModellIt is compared.Parameter p, T are respectively formed and is transmitted to model and repaiies The pressure difference Δ p and torque difference Δ T of positive unit 15, Modifying model unit 15 determine the contact point further transmitted to model 13 Corresponding correction amount TP.
The embodiment of pressure-stroke characteristic curve as the monitor 12 is monitored is shown in FIG. 3.In this feelings Under condition, s points of stroke is three regions, and wherein pressure characteristic curve is also extended.It is beaten in the region for being referred to as supplementing region A Intercommunicating pore 16 is opened, which connect the hydrostatic stroke of clutch actuation system 1 with tank 17, wherein hydrostatic The pressure p of hydraulic fluid 6 in pressure stroke can be compensated (Fig. 1).
Region B including 9 gap of friction clutch eliminates friction clutch close to the supplement region A in the B of the region The gap of device 9.This explanation, although the hydrostatic actuator 3 of clutch actuation system 1 is moved, no torque passes through Friction clutch 9 transmits.Clamping region C immediate area B, wherein clamping force is effective, and in this case rub from Clutch 9 transmits torque.It is in this case proportionate relationship with clamping force to clamp pressure, and friction clutch 9 is connect by clamping force Close clutch disk.Clamping force is again proportional to clutch torque T.
It is learnt from the schematic diagram of Fig. 4, during contact point shifted by delta TP, characteristic curve only shifts in clamping region C.Root According to the prior art, supplementing region A and in the region B in the gap including friction clutch 9, contact point does not deviate.
Fig. 5 shows the schematic diagram of determination contact point according to the method for the present invention.Dotted line indicates that original pressure characteristic is bent Line.Reference pressure signal D is introduced into the pressure signal p in the region B in gap, which is more than pressure signal The signal fluctuation that p has in these regions A, B.This reference pressure signal D is for example generated by sensor spring 18, sensing Device spring 18 is securely fixed on friction clutch 9, and especially on clutch case 19, and sensor spring 18 is with limited Length.Increased pressure excursion is introduced by the sensor spring 18.Arrow P1 indicates the threshold value of signal fluctuation P4.Pass through prison Reference pressure signal D can be detected to sufficiently clear in the B of region by surveying device 12.The region B in the gap including friction clutch 9 It is divided into lifting region B1 and sensor region B2 by introducing sensor spring 18, wherein the promotion of pressure signal p levels is logical The reference pressure signal crossed in sensor region B2 is completed.On the basis of detecting threshold pressure by monitor 12, utilize Reference pressure signal D introduces the revised detection threshold value Ln for contact point.Detection threshold value La before the amendment of contact point is logical Cross arrow P2 labels.The revised detection threshold value Ln reduced by the detection threshold value before this opposite amendment, can promoted Butt contact carries out adaptation in the process and and correspondingly, characteristic curve is before friction clutch 9 starts to transmit torsion Just move.This is shown by arrow P3.
It is shown in FIG. 6 the isoboles of revised clutch model to be used.In this case, pressure p It acts on pressurized tank 20 and hydraulic fluid 6, this spring 21 that acts through is shown.Pressurized tank 20 is via disc spring 22 and clutch Lid 19 connects, and leaf spring 23 is secured on clutch case 19, and leaf spring 23 has gap towards hydraulic fluid 6 and 20 side of pressurized tank LS.According to the present invention, sensor spring 18 is placed on clutch case 19 now.The sensor spring 18 can have freely End.
The axial direction model is reduced to friction clutch 9 and relevant rigidity, obtain in the figure 7 shown in characteristic curve Shape.The characteristic curve shape with correct before shown in pressure-stroke characteristic curve it is corresponding.As illustrated in figure 6 Ground if the sensor spring 18 of finite length is added in gap L S, and correspondingly reduces disc spring power 22, then will produce New pressure-stroke characteristic.This feature includes above-mentioned characteristic now, so as in detector gap LS characteristic curve offset and Butt contact is adapted to.
As expansion scheme, additionally it is possible to introduce the sensor spring with stop part, this corresponds to the reference in gap L S The stair-stepping pressure change of pressure signal D, as shown in Figure 8.The shape 24 of this ladder of reference pressure signal D needs less Air stroke, and provide better stroke resolution ratio.According to the design, the shape of ladder also has than free sensor bullet 16 smaller stroke tolerance of spring.In this form, it has to be noted that, the height of ladder has been more than relative to winding level Detection threshold value, so as to carry out contact point adaptation directly at ladder 24.
Sensor spring with stop part can also be sufficiently adapted to earlier than clamping region C, thus friction from Under 9 non-operation of clutch or friction clutch 9 when it is disconnected, driver cannot discover the contact of pressure ladder.
Reference numerals list
The clutch actuation system of 1 hydrostatic
2 controllers
The clutch actuator of 3 hydrostatics
4 pistons
5 master cylinders
6 hydraulic fluids
7 fluid pressure lines
8 secondary cylinders
9 friction clutches
10 pressure measurers
11 stroke sensors
12 monitors
13 models
14 operation nodes
15 Modifying model units
16 intercommunicating pores
17 tanks
18 sensor springs
19 clutch cases
20 pressurized tanks
21 springs
22 disc springs
23 leaf springs
24 jerk
A supplements region
B includes the region in the gap of friction clutch
C clamping regions
D reference pressure signals

Claims (10)

1. a kind of method for being adapted to the contact point of friction clutch, clutch operating of the friction clutch in automation It is driven by the actuator (3) of hydrostatic in system (1), wherein be adapted to according to pressure-stroke-characteristic curve by pressure (p) Contact point, thereby determine that and the relevant clamping force-stroke-relationship of clutch torque (T) transmitted, which is characterized in that Production in the region (B) in the gap of before the clamping region (C) of the friction clutch (9) the including described friction clutch (9) The reference pressure signal (D) that life can be reliably detected, and after detecting the reference pressure signal (D), not Monitor in the case of the clutch torque (T) that butt contact is adapted in the region (B).
2. according to the method described in claim 1, it is characterized in that, the reference pressure signal that can be reliably detected (D) it is more than the interference signal occurred in the region (B) in the gap including the friction clutch (9).
3. method according to claim 1 or 2, which is characterized in that the reference pressure signal (D) with it is described rub from The pressure (p) occurred in the clamping region (C) of clutch (9) is at close to constant ratio.
4. according to the method described in claim 1,2 or 3, which is characterized in that by structural detail (18) be placed in it is described rub from In the gap (LS) of clutch (9), to generate the reference pressure signal (D).
5. according to the method described in claim 4, it is characterized in that, being fixedly connected with the friction clutch (9) in side Structural detail (18) has relative to the clamping force characteristic curve occurred in the clamping region (C) of the friction clutch (9) Constant stroke offset.
6. method according to claim 4 or 5, which is characterized in that in the gap (LS) including the friction clutch (9) Region (B) in form the detection zone (B2) by the constant stroke offset determination, in the detection zone (B2) Butt contact is adapted to.
7. method according at least one of the preceding claims, characterized in that using spring part (18) described in Structural detail.
8. method according at least one of the preceding claims, characterized in that the reference pressure signal (D) has Scheduled waveform.
9. according to the method described in claim 8, it is characterized in that, the scheduled waveform of the reference pressure signal (D) includes Stairstepping (24).
10. according to the method described in claim 9, it is characterized in that, generating institute by carrying out backstop to the structural detail State the stairstepping of the waveform of reference pressure signal (D).
CN201810036416.7A 2017-01-18 2018-01-15 Method for adapting a contact point of a friction clutch Active CN108331856B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017100927.2A DE102017100927A1 (en) 2017-01-18 2017-01-18 Method for adapting a touch point of a friction clutch
DE102017100927.2 2017-01-18

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Publication Number Publication Date
CN108331856A true CN108331856A (en) 2018-07-27
CN108331856B CN108331856B (en) 2021-04-20

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DE (1) DE102017100927A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111981058A (en) * 2019-05-21 2020-11-24 上海汽车集团股份有限公司 Wet clutch pressure control method and system

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5337874A (en) * 1993-03-19 1994-08-16 Eaton Corporation Method/system for determining clutch touch point
GB2330889B (en) * 1997-05-30 2002-05-15 Luk Getriebe Systeme Gmbh Method and device for controlling a clutch
EP2053262A1 (en) * 2007-10-26 2009-04-29 GM Global Technology Operations, Inc. Method and apparatus to control clutch fill pressure in an electro-mechanical transmission
EP1437520A3 (en) * 2003-01-13 2009-09-02 Continental Automotive GmbH Method of controlling an automatically actuated clutch
US20130020169A1 (en) * 2010-04-08 2013-01-24 Schaeffler Technologies AG & Co. KG Method for controlling an automated clutch
CN103161851A (en) * 2011-12-19 2013-06-19 腓特烈斯港齿轮工厂股份公司 Method and device for determination a touch point of a friction clutch
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