CN103975173B

CN103975173B - The operating system of hydraulic pressure

Info

Publication number: CN103975173B
Application number: CN201280057038.1A
Authority: CN
Inventors: 埃克哈德·赖博尔特; 马丁·福内赫姆; 马库斯·贝尔; 亚历山大·埃西格; 卢卡斯·霍尔策; 约翰内斯·莫斯海默; 维尔纳·施米特; 托尔斯滕·埃西格
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2011-11-24
Filing date: 2012-11-06
Publication date: 2017-09-08
Anticipated expiration: 2032-11-06
Also published as: WO2013075687A3; JP2014533815A; CN103975173A; JP6422928B2; JP6238902B2; JP2017062043A; WO2013075687A2

Abstract

A kind of to be used to check the operating system of hydraulic pressure, the especially method of the correct filling of hydraulic clutch system and the method for carrying out fault detect in hydraulic clutch operating system and in the friction clutch operated whereby, wherein hydraulic clutch operating system includes：The piston that can be operated by control device by means of actuator in the cylinder with pressure medium；For the first sensor for the pressure for detecting pressure medium；With the second sensor for detecting position of the actuator along actuator displacement.

Description

The operating system of hydraulic pressure

Technical field

It is used to check the method for the correct filling of the operating system of hydraulic pressure and a kind of behaviour of hydraulic pressure the present invention relates to a kind of Make system.

The present invention be used for monitor hydrostatic operating system, especially hydrostatic clutch system in maintenance, i.e. for example Correct filling in factory is safeguarded.

Background technology

Hydrostatic clutch system is implemented by clutch actuator, and the clutch actuator has pressure sensing Device, this shows in Fig. 1 for example in the A1 of DE 10 2,010 047 800 and the A1 of DE 10 2,010 047 801.Clutch Actuator is so-called hydrostatic clutch actuator HCA (Hydrostatic Clutch Actuator).It is this hydrostatic to hold Row device is it will be appreciated that be the actuator of such as pressure pipeline with hydraulic fluid with hydrostatic bang path.Pressure pipe Pressure in road is detected by pressure sensor.If moving the element being attached thereto by hydrostatic actuator, then Hydraulic fluid is moved in bang path or pressure pipeline, for example, caused by master cylinder, and the master cylinder is to pass through hydraulic fluid coupling The mode of connection moves slave cylinder.If it is desired to element is maintained in its position, then hydraulic fluid is static in bang path, makes There must be the hydrostatic pressure condition of hydraulic fluid, the actuator is named with the state.

Hydraulic clutch system, it is used for example as hydraulic clutch actuator (HCA) for the piece-rate system for clutch Necessary for the function of ensuring no problem but without air.Therefore, it is known to be equipped with hydraulic clutch segregative line Vacuum filling is carried out during the startup first of the motor vehicle of system.Under maintenance condition --- such as in factory is safeguarded --- generally not There is provided the auxiliary body of this consuming so that realize hydraulic clutch release system by means of corresponding factory regulation to preset Relative to starting the equivalent flow refilled first.Here, in filling always importantly, unrelated with the type of filling, It is completely filled with the path to be filled and then in the absence of surplus air.

Here, because component tolerance only can limitedly use loading or fill the default of pressure.In hydraulic path The filling process for remaining surplus air may be according to prior art --- and such as it is 10 2,011 087 for example by document number 684.7 German patent application and document number describes for 102,011 087 652.9 German patent application --- with not remaining The complete filling of system of remaining air is no to be distinguished well enough.But, be able to wherein should should during vehicle is run When script only exist hydraulic fluid bang path or pressure pipeline in detect this surplus air.It is generally contemplated that can examine Following gaseous parts are surveyed, the gaseous parts can be located at or be formed in bang path or pressure pipeline.In principle, in order to This gaseous part is exported, --- passage is also referred to as --- provided with the so-called blow vent to equalizing reservoir, the ventilation Mouth is long-term in the prior art known and same in the A1 of DE 10 2,010 047 800 and DE 10 2,010 047 801 In A1 but also described in the German patent application that document number is 10 2,011 103 774.1.Therefore, clutch controller Clutch actuator must be moved into specific position relative to blow vent, enabling by existing via blow vent release The mode that connects and can be deflated between bang path and equalizing reservoir carries out the deflation of bang path.

Term " surplus air " will also appreciate that to promote in the operating system of hydraulic pressure, especially clutch in this context All other gaseous materials in the hydraulic pressure transfer path of dynamic device or speed changer actuator.

(passed for clutch " standard state " (bang path does not include surplus air) and clutch " surplus air state " Path is passed comprising surplus air) situation, respectively the difference for two pressure value Ps 1 and P2 two displacement differences drawn is extremely small, So that can not substantially and securely be distinguished according to these situations of prior art.

When changing clutch, hydrostatic clutch system --- for example in factory is safeguarded --- is not performed in maintenance Vacuum pressure is filled.There, by means of air bleeding step (being used for the position slope for constantly closing and opening clutch) to liquid Path is pressed to deflate.It must monitor and finally terminate the deflation course.

The content of the invention

The present invention is based on following purposes：Propose a kind of in maintenance --- such as in factory is safeguarded --- without using Vacuum pressure checks operating system, the method for the especially correct filling of hydraulic clutch system of hydraulic pressure in the case of filling.It is special , should not research and develop for reliably recognize hydraulic pressure operating system in surplus air method.

The purpose by according to the present invention it is a kind of be used for check hydraulic pressure operating system correct filling method and Realized according to a kind of operating system of hydraulic pressure of the present invention.

Hydraulic pressure can be further improved by the method according to the invention and according to the operating system of the hydraulic pressure of the present invention The identification of gaseous material in bang path, especially surplus air.

In terms of method and technology, the purpose is realized also by method as described below.

Term position-pressure indicatrix and displacement-pressure indicatrix are synonymously applied in this context.Art Language displacement or position are related to actuator displacement, the part of the mobile clutch of actuator --- such as the piston in master cylinder --- Moved along the actuator displacement.

According to the present invention it is proposed that a kind of method for being used to check the correct filling of the operating system of hydraulic pressure, the operation system System has：The piston that can be operated by control device by means of actuator in cylinder；The first sensing for detecting the pressure in cylinder Device；With the second sensor for detecting position of the actuator along actuator displacement, it is characterised in that in order to being situated between with pressure The operating system that matter correctly fills hydraulic pressure is checked and implements following checking steps：

Actuator is moved to default, maximum actuator position and detected at maximum actuator position Pressure, the pressure detected is compared with default maximum pressure value, wherein when the pressure detected and default maximum When pressure values are consistent within first margin of tolerance, checking step is considered as successful execution, and otherwise checking step is considered as not Successful execution and there is incorrect filling,

The maximum pressure gradient of position-pressure indicatrix is determined in the default region of indicatrix, wherein when Identified maximum pressure gradient is checked when being more than default pressure gradient threshold value in the case of considering second margin of tolerance Step is considered as successful execution,

Position-pressure indicatrix is determined until there are two position-pressure indicatrixes, by the two position-pressures Strong indicatrix is compared, wherein when the two positions-pressure indicatrix is consistent within the 3rd margin of tolerance, checking Step is considered as successful execution, otherwise checking step be considered as unsuccessful execution and there is incorrect filling,

Wherein when all three checking step successful executions, there is correct filling.

In the case where being less than pressure gradient threshold value by maximum pressure gradient, air in systems is safe. The specific determination of the numerical value of the threshold value must hand those skilled in the art, since it is desired that considering the technical sorrow of separation Condition.

Proposed in the especially preferred form of implementation of the present invention, the two position-pressures determined in succession in time Implement the comparison of two position-pressure indicatrixes on strong indicatrix.

Proposed in another especially preferred form of implementation of the present invention, implement the ratio of two position-pressure indicatrixes Compared with so that determine whether there is the two positions-skew of pressure indicatrix to each other.

Proposed in another preferred form of implementation of the present invention, implement the comparison of two position-pressure indicatrixes, make Must determine, if on time of occurrence rear defined location-pressure indicatrix relative on the time in preceding defined location-pressure Strong indicatrix is moved towards smaller actuator position.

Propose, compared by comparing two positional values to perform in another preferred form of implementation of the present invention, it is described Positional value respectively from two position-pressure indicatrixes it is common, default compare drawn at pressure values.

Propose, compared by comparing two sample points to perform in another preferred form of implementation of the present invention, it is described Sample point is drawn from two positions-pressure indicatrix respectively.

Being proposed in another especially preferred form of implementation of the present invention, when there is incorrect filling, passing through control Equipment promotes to deflate.This is directly carried out then or in next opportunity.

Proposed in another especially preferred form of implementation of the present invention, by by means of actuator along actuator displacement Clutch is moved on closing direction to determine the pressure gradient of maximum.

Propose, pass through in the default position range around passage in another preferred form of implementation of the present invention Move clutch on closing direction to determine the pressure gradient of maximum along actuator displacement by means of actuator.Here, being Determine that actuator displacement can for example use the end face of hydraulic fluid side of the piston in cylinder.

Proposed in the preferred form of implementation of another alternative of the present invention, in the case of default pressure values by by Along actuator displacement clutch is moved on closing direction in actuator to determine the pressure gradient of maximum, wherein default pressure Intensity values are preferably between 0.5bar and 6bar.The specific determination of the numerical value of default pressure values must hand art technology Personnel, since it is desired that considering technical individual cases.

Additionally or alternatively proposed in another form of implementation of the present invention：Preferred 0bar to 7.5bar, especially It is preferred that in 0bar to 5.5bar default pressure range by by means of actuator along actuator displacement on closing direction Clutch is moved to determine the pressure gradient of maximum.The specific determination of default pressure range must also hand ability herein Field technique personnel, since it is desired that considering technical individual cases.

Proposed in another preferred form of implementation of the present invention, hydraulic pressure is being refilled or be again filled with pressure medium Operating system after perform for checking the method correctly filled.

Proposed in another especially preferred form of implementation of the present invention, perform correctly filled out for checking at regular intervals The method filled is to check the availability of the operating system of hydraulic pressure.

Proposed in another preferred form of implementation of the present invention, by operating hydraulic pressure during specific travel situations Operating system performs the method for inspection.

Proposed in another preferred form of implementation of the present invention, by means of testing stand computer or by means of tester or Implementing to perform by means of the control device of the equipment for the operating system for being wherein provided with hydraulic pressure is used to check the method correctly filled.

Proposed in another form of implementation of the present invention, the result of correct and/or incorrect inspection is stored in event Shown in barrier memory and/or by display.

The purpose is realized also by the operating system of following hydraulic pressure in terms of equipment and technology.

Hydraulic control system is proposed according to the present invention, it has：Can be operated by control device by means of actuator in cylinder Piston, the first sensor for detecting the pressure in cylinder and for the second sensor for the position for detecting actuator.According to The present invention is proposed：Implement the above method to be checked the operating system that hydraulic pressure is correctly filled with pressure medium.

Proposed in the especially preferred form of implementation of the present invention, the operating system of hydraulic pressure is hydraulic clutch operation system System.

Proposed in another preferred implementing form of the present invention, the operating system of hydraulic pressure is hydraulic transformer operating system.

But the operating system of this hydraulic pressure can not only be used in hydraulic clutch operating system or hydraulic transformer behaviour Make in system, and can advantageously be used in the gear adjuster in transmission system, be used as being used for choke valve, auxiliary Help the operating system in the motor system of unit and auxiliary machine set drive, the operation being used as in deflation guiding and loading system System, using in brakes and for being operated in load-carrying vehicle or building machinery.

Brief description of the drawings

The other advantages and favourable design of the present invention are following accompanying drawings and its theme described.

Fig. 1 shows the schematic configuration diagram of hydrostatic clutch system,

Fig. 2 shows in hydraulic path displacement-pressure indicatrix when in different air capacities,

Fig. 3 shows the maximum pressure gradient in the bottom pressure region of four displacements-pressure indicatrix in Fig. 2.

Embodiment

In Fig. 1 hydraulic pressure is schematically illustrated by taking hydraulic pressure, the hydrostatic clutch actuator (HCA) schematically illustrated as an example The structure of clutch system 1.Hydraulic clutch system 1 includes the control device 2 of control actuator 3 on master end 15.To Piston 19 in actuator 3 and cylinder 4 along actuator displacement carry out position change to the right when, the volume of cylinder 4 is changed, and is thus existed Pressure P is formed in cylinder 4, the pressure is transferred to the driven of hydraulic clutch system 1 via pressure medium 7 by hydraulic pipeline 9 Side 16.Hydraulic pipeline 9 is matched with the structure space situation of vehicle in terms of its length and shape.On slave end 16, in cylinder 4 ' In the pressure P of pressure medium 7 cause change in displacement, the change in displacement is delivered on clutch 8 with clutch described in convenient to operate Device.Master end pressure P in cylinder 4 on the master end 15 of hydraulic clutch system 1 can be examined by means of first sensor 5 Survey.First sensor 5 is preferably pressure sensor.The shift length passed through along actuator displacement by actuator 3 by Detected in second sensor 6.

The form of implementation of the present invention is to be used to assess directly in passage (Schn ü in the case where clutch is closed Ffelbohrung the method that the pressure in region) rises.

Displacement-pressure indicatrix is determined in the case where clutch is closed, figure 2 illustrates four this displacement-pressures Strong indicatrix (110,120,130,140).Figure 2 illustrates the clutch closure having respectively to this typical hesitation (the corresponding upper part of curvilinear motion) and clutch are opened (part lower accordingly of curvilinear motion).In order to reduce interference shadow Ring, not Direct Analysis displacement and pressure signal, but (such as PT1 filtering) is somewhat filtered to it.

Pressure gradient (the ratio between pressure difference and displacement difference) is determined from filtered signal.In order to determine pressure gradient, The method (such as Kalman filtering) of alternative can be used.

If also there is air in hydraulic path, then obtain small in the region of passage when closing clutch Pressure gradient.

For assessing the stability of displacement-pressure indicatrix and in the case where clutch is closed directly in passage Maximum accessible pressure, the method for the pressure gradient of maximum in region.

As a part for air bleeding step, clutch is regularly fully disconnected, that is, opens passage and then carries out liquid It is feasible to flatten weighing apparatus, is fully closed until being moved to clutch, reaches the displacement of maximum or maximum allowable pressure, and And be next again off.

Stage 1：Monitor maximum accessible pressure

In the case of there is large quantity of air in hydraulic path, do not have in maximum actuator position 170 (22mm in Fig. 2) Have and reach pressure 180 (40bar in Fig. 2) (displacement-pressure indicatrix 140 in Fig. 2) required by maximum.With hydraulic pressure road Air capacity in footpath declines, and maximum accessible pressure rises, until finally reaching the pressure (position in Fig. 2 required by maximum Shifting-pressure indicatrix 130).

Stage 2：The maximum pressure gradient directly in the region of passage is monitored in the case where clutch is closed

In the case where clutch is closed, the first pressure is caused to rise until the model of leaf spring pretension after passage closing Enclose (the about 5bar in Fig. 2).According to the method for example described in German patent application 10 2,011 087 652.9, The pressure gradient of maximum is determined in the region and herein using maximum pressure gradient for monitoring.Fig. 3 is shown for phase Maximum pressure gradient 210,220,230,240 determined by the displacement answered-pressure indicatrix 110,120,130,140.Most Big pressure gradient must be over default threshold value 250 (such as the 3bar/mm in Fig. 3), to be successfully executed monitor stages. However, the criterion is not enough to recognize optimal deflation (displacement-pressure indicatrix 120 in Fig. 2).

The pressure gradient of maximum is identified below：

If also there is air in hydraulic path, then obtain small in the region of passage when closing clutch Pressure gradient.There are two alternatives A and B to assess：

A. in fixed pressure (such as 2bar), pressure gradient is compared with fixed default threshold value.Less than threshold value In the case of, air in system or safety.This is passed to clutch controller, therefore, it is possible to start further to put Gas.Therefore according to moving curve A, direction of the clutch actuator 3 along closure clutch is moved in certain position so that deposited In the default pressure in preferably 0.5 to 6bar pressure range, particularly preferably there is default 2bar pressure.At this In position, for example, pressure gradient is determined from the shift value and pressure values that are measured before directly, or as an alternative in default pressure In the range of implement the small movement on the direction of closure clutch, to obtain for determining in default pressure range The measured value of pressure gradient.The identified pressure gradient regards as the pressure gradient of maximum for other moving curve.Connect Get off, identified maximum pressure gradient is compared with default pressure gradient threshold value 250.If identified maximum pressure The numerical value of gradient is less than default pressure gradient threshold value 250, then cause is the presence of gaseous part in bang path.It is default Pressure the specific determination of numerical value and the specific determination of numerical value of pressure gradient threshold value 250 must also hand herein Those skilled in the art, since it is desired that considering technical individual cases and the gaseous state portion of the operating system of the hydraulic pressure of clutch Divide the characteristic on pressure.Here, those skilled in the art's preset pressure value, around passage in the case of the pressure value The pressure gradient to be expected is especially big.

B. in lower position region (such as when the end face of the hydraulic fluid side of the piston 19 in cylinder 4 is in the extension of blow vent 18 Region in when for around the region of the extension of passage) and/or bottom pressure range (such as 0-5bar) in determine warp The maximum pressure gradient 210 of the displacement of filtering-pressure indicatrix 110.The maximum pressure gradient and fixed default threshold Value 250 compares.When less than threshold value 250, air in systems or safety.This is passed to clutch control, therefore Further deflation can be started.Therefore according to moving curve B, direction of the clutch actuator 3 along closure clutch is moved Into certain position so that the end face of the hydraulic fluid side of the piston 19 in cylinder 4 is located at the default of the region of the extension of blow vent 18 The section start of the band of position, wherein passage extension region representation surround passage the band of position, in the position Can rule of thumb expect in region maximum pressure gradient, such as example in Fig. 2 or Fig. 3 preferably -2.5mm to+ It is such case in the 12.0mm band of position.As alternative or in addition to preset position area, clutch actuator 3 It is moved upwards up in certain position, exists in the position especially excellent from preferably 0 to 7.5bar in the side of closure clutch Select the minimum pressure (section start of default pressure range) in the pressure range between 0bar and 5.5bar.In the expansion of blow vent In the default band of position in the region of exhibition or as an alternative in default pressure range or as an alternative in the presence of from default The position of the band of position and when there is pressure in default pressure range, determines to be present in corresponding by following manner Default region in maximum pressure gradient：--- on the direction of closure clutch --- pass through institute i.e. by means of actuator State default region and determine displacement-pressure indicatrix, next determined from the displacement-pressure indicatrix default The maximum pressure gradient in region.Next, identified maximum pressure gradient is carried out with default pressure gradient threshold value 250 Compare, the pressure gradient threshold value preferably have with according to moving curve A identical numerical value.If identified maximum pressure The numerical value of gradient is less than default pressure gradient threshold value 250, then --- such as in moving curve A --- cause is in transmission There is gaseous part in path.Specific determination, default pressure range around the default band of position of passage The specific determination of the numerical value of specific determination and pressure gradient threshold value 250 must also hand people in the art herein Member, since it is desired that the technical individual cases of the operating system of the hydraulic pressure of consideration clutch and gaseous parts are on pressure Characteristic.Here, those skilled in the art preset following ranges, the pressure gradient to be expected around passage is outstanding in this range Its is big.

Stage 3：Monitor the stability of displacement-pressure indicatrix

Checked in next monitor stages：Whether cause displacement-pressure indicatrix in successive deflation slope to more Movement (the displacement compared with displacement-pressure characteristic curve 120-pressure characteristic curve in fig. 2 of small actuator position 110).It is described to compare in order to which simplicity performs (such as the 20bar in Fig. 2) in the case of default pressure.Holding belonging to storage Row device position.If affiliated actuator position keeps constant in successive deflation slope or is at least maintained at the narrow margin of tolerance Within, then it is successful that deflation, which can be classified as,.

Instead of in the case of default pressure, the displacement to be compared-pressure characteristic curve can be also assessed as an alternative 110th, 120 along the position of total characteristic curve 110,120.

As other alternative, the sampling recognized compared according to corresponding displacement-pressure indicatrix Point can for example be assessed such as it according to document number determined by 10 2,011 088 430.0 German patent application.

Stage 4：The end of air bleeding step

If deflation is considered successful, then can terminate air bleeding step.Additionally, this is passed to clutch controller And start the tester of air bleeding step.

Described multistage method allows the reliable of the correct filling to the hydrostatic clutch system in maintenance Monitoring.It can at any time be put by means of stage method and release current deflation status.This is not at the stage that is used alone 3 Feasible.

Propose for according to maximum achievable pressure, when clutch close it is direct in the region of passage most The operating system for assessing to monitor hydraulic pressure of the stability of big pressure gradient and displacement-pressure indicatrix, especially hydrostatic The method for pressing the correct filling of clutch system.

It is used for the present invention also relates to a kind of in the clutch actuation system of hydraulic pressure and in the friction clutch operated whereby The method that fault detect is carried out in device.

The present invention is used to control the hydrostatic operation in automatic shifting transmission, especially in dual-clutch transmission System, especially hydrostatic clutch actuation system.

Hydrostatic clutch system is implemented by clutch actuator, and the clutch actuator has pressure sensor And displacement transducer, this Fig. 1 for example in the A1 of DE 10 2,010 047 800 and the A1 of DE 10 2,010 047 801 In show.Clutch actuator is so-called hydrostatic clutch actuator HCA (Hydrostatic Clutch Actuator).This hydrostatic actuator is it will be appreciated that be with hydrostatic bang path, such as pressure with hydraulic fluid The actuator of hydraulic piping.Pressure in pressure pipeline is detected by pressure sensor.If should by hydrostatic actuator come The mobile element being connected with this, then hydraulic fluid is moved in bang path or pressure pipeline, for example, caused by master cylinder, institute Master cylinder is stated to move slave cylinder by way of coupling hydraulic fluid.If element should be maintained in its position, then liquid Press liquid is static in bang path so that there is the hydrostatic pressure condition of hydraulic fluid, and the actuator is named with the state.

In order to operate clutch, especially double clutch system, hydrostatic clutch actuator HCA is used as segregative line System.The hydrostatic clutch actuator is made up of piston, and the piston via mechanically connecting by Motor Control simultaneously accordingly And the piece-rate system of clutch is operated via hydraulic path.Clutch is usually --- by means of spring equipment without by means of Clutch actuator --- the clutch (normally open clutch) disconnected automatically, and it by means of HCA relative to spring equipment Spring force and close.HCA --- such as having been described above being described in detail --- is equipped with the displacement of the inside for detecting actuator displacement Sensor and the internal pressure sensor for detecting the pressure in hydraulic path.

Hydrostatic piece-rate system is laid in provided with sufficiently large actuator path, to ensure during whole service life The operation of not self-adjustable clutch.Leakage in clutch abrasion and/or hydrostatic pressure system cause it is required from Deviation between clutch torque and the clutch torque that can actually transmit；Hydrostatic system must be eliminated in the factory according to reason The clutch components of leakage or replacing abrasion in system.Currently, in HCA systems, the mill of clutch can be recognized without method The failure of damage or hydraulic clutch, i.e., the leakage between clutch actuator and clutch engagement equipment.In the two failures Also do not made a distinction between possibility.For driver, consequence can be only perceived, that is, does not comply with required clutch Device torque.

Trouble shoot in factory links together with high consuming.In the absence of failed storage table (Fehlerspeichereintrag).In the case of wrong operation of motor, the dimensions different from the failure of hydraulic path are introduced into Repair measure.

The present invention is based on following purposes, and the detection and differentiation of failure cause are realized in the case of wrong operation of motor.Find Following solution, the solution allow to detect too early clutch abrasion and leakage in identification clutch system and Made a distinction between the two likelihood of failure, to simplify the accident analysis in factory.

It is used for by according to a kind of of the present invention in the clutch actuation system of hydraulic pressure and in the friction operated whereby The method for carrying out fault detect in clutch realizes the purpose.

According to the present invention it is proposed that in hydraulic clutch operating system and in the friction clutch operated whereby The method for carrying out fault detect, wherein hydraulic clutch operating system includes：Can be set by control in the cylinder with pressure medium The standby piston operated by means of actuator, the first sensor of pressure for detecting pressure medium and for detecting actuator edge The second sensor of the position of actuator displacement.According to the present invention, herein propose, when meeting one in following conditions or many When individual, the failure in friction clutch in hydraulic clutch operating system or operating whereby is recognized：

Pressure medium is less than default minimum pressure boundary value in the pressure of the predetermined position of actuator,

The distance between default position on the position of the current sample point of clutch and actuator displacement is small In default alternate position spike boundary value,

The sample point of clutch was determined within the default period terminated with the time point of last determination The pace of change of numerical value is more than default sample point pace of change boundary value, and the pace of change of wherein sample point is the institute of sampled point The temporal gradient changed on the time of the value of determination,

When clutch torque is improved to another default clutch nominal force from default initial clutch rated moment During square, motor rotary speed is more than initial speed and default motor rotary speed boundary value sum,

When the determination within the default period terminated with the time point of last determination of the friction valve of clutch Numerical value pace of change exceed default friction valve pace of change boundary value when, the pace of change of wherein friction valve is friction valve Identified value time on the temporal gradient that changes.

In this manner, it is possible to failure, the i.e. hydraulic clutch operation system advantageously in identification hydraulic clutch operating system Failure, i.e. clutch pad wear in the leakage of system and/or friction clutch.

Each condition is mutual alternative.The method according to the invention not only defines the whole implemented in succession and replaced Scheme is selected, and is advantageously only implemented in an especially preferred form of implementation with unique condition or multiple conditions. Consider that those skilled in the art are handed under technical individual cases selects one or more most preferred conditions.

Proposed in another especially preferred form of implementation of the method according to the invention, when constant in actuator position In the case of temporal pressure drop be more than default pressure drop boundary value when, recognize in hydraulic clutch operating system therefore Barrier.

The failure in hydraulic clutch operating system can be advantageously recognized in this way, leaked.

In another especially preferred form of implementation of the method according to the invention, when meet one in following conditions or When multiple, the failure in hydraulic clutch operating system is recognized：

Temporal pressure drop when actuator position is constant at the default position of actuator is more than default Boundary value drops in leak pressure,

In corresponding current sample point (130,160) of the clutch (8) in time course and actuator displacement On the temporal change of the distance between default position be more than default leak position difference change boundary value (210), its The pace of change of middle sample point is the temporal gradient changed on the time of the identified numerical value of sample point,

The sample point of clutch was determined within the default period terminated with the time point of last determination The pace of change of numerical value is more than default leakage sample point pace of change boundary value.

The leakage of failure, i.e. hydraulic clutch operating system in hydraulic clutch operating system in this way can be favourable Ground according to each individually condition it is identified and with the failure in each individually non-existent friction clutch of condition, That is clutch pad wear makes a distinction.

Each condition is alternative to each other.The method according to the invention not only provides the whole alternative sides implemented in succession Case, and advantageously only implemented in an especially preferred form of implementation with unique condition or multiple conditions.Considering Those skilled in the art are handed under technical individual cases and select one or more most preferred conditions.

In another especially preferred form of implementation of the method according to the invention, when meet one in following conditions or When multiple, the failure in the friction clutch operated by hydraulic clutch operating system is recognized：

Pressure of the pressure medium on the default position of actuator be less than default minimum pressure boundary value, and Temporal pressure drop when actuator position is constant on the default position of actuator is less than default leak pressure and drops side Dividing value,

The distance between default position on the position of the current sample point of clutch and actuator displacement Less than default alternate position spike boundary value, and in the corresponding current sample point and actuator in time course of clutch The temporal change of the distance between default position in displacement is less than default leak position difference change boundary value, wherein The pace of change of sample point is the temporal gradient changed on the time of the identified numerical value of sample point,

The sample point of clutch was determined within the default period terminated with the time point of last determination The pace of change of numerical value is more than default sample point pace of change boundary value, and the sample point of clutch with really finally The pace of change of the numerical value determined within the default period that fixed time point terminates is less than default leakage sample point change Speed edges value.

Failure, i.e. clutch pad wear in friction clutch in this way can be advantageously according to arbitrary single Condition it is identified and with failure, the i.e. hydraulic pressure in each individually non-existent hydraulic clutch operating system of condition from The leakage of clutch operating system makes a distinction.

Each condition is alternative to each other.The method according to the invention not only provides that the whole that can implement in succession is replaced Scheme is selected, and is advantageously only implemented in especially preferred form of implementation with unique condition or multiple conditions.Considering Those skilled in the art are handed under technical individual cases and select one or more most preferred conditions.

Proposed in another especially preferred form of implementation of the method according to the invention, it is described pre- in actuator displacement If position be closure clutch direction on maximum actuator displacement (120).

Proposed in another preferred form of implementation of the method according to the invention, only consider successive in time two The sample point on the direction that clutch is closed between sample point is determined changes.

Proposed in another preferred form of implementation of the method according to the invention, according to initial speed and/or default Clutch rated moment and initial clutch rated moment between torque difference determine default motor rotary speed boundary value.

Proposed in another preferred form of implementation of the method according to the invention, it is true according to the default position of actuator Determine leak pressure drop boundary value and/or minimum pressure boundary value.

Proposed in another preferred form of implementation of the method according to the invention, sample point pace of change boundary value is less than Leak sample point pace of change boundary value.

It is illustrated in detail in：

Fig. 1 shows the schematic configuration diagram of hydrostatic clutch system；

Fig. 4 shows that multiple forms of implementation of the method according to the invention illustrate pressure-displacement clutch characteristics curve.

Liquid is schematically illustrated with the example of hydraulic pressure, the hydrostatic clutch actuator (HCA) schematically illustrated in Fig. 1 Press the structure of clutch system 1.Hydraulic clutch system 1 includes the control device 2 of control actuator 3 on master end 15.To Piston 19 in actuator 3 and cylinder 4 along actuator displacement carry out position change to the right when, the volume of cylinder 4 changes, thus in cylinder Pressure P is formed in 4, the pressure is transferred to the slave end of hydraulic clutch system 1 via pressure medium 7 by hydraulic pipeline 9 16.Hydraulic pipeline 9 is matched with the structure space situation of vehicle in terms of its length and shape.On slave end 16, in cylinder 4 ' The pressure P of pressure medium 7 cause change in displacement, the change in displacement is delivered on clutch 8 with clutch described in convenient to operate. The pressure P in cylinder 4 on the master end 15 of hydraulic clutch system 1 can be detected by means of first sensor 5.First passes Sensor 5 is preferably pressure sensor.Along the shift length passed through by actuator 3 of actuator displacement by means of the second sensing Device 6 is detected.In this view hydraulic clutch system 1 is schematically illustrated only for a clutch.In double clutch system In the case of, similarly operate second clutch.

By operating clutch by means of HCA in hydrostatic mode, obtained for corresponding clutch with feature Clutch indicatrix (pressure and torque characteristic curve), the clutch indicatrix for example can be on clutch displacement Or shown in the chart on the clutch engagement force (pressure) applied.Main piston is carried out in HCA by internal motor Operation follows the pressure change in hydrostatic pressure system closely and then follows the change in location for the clutch to be operated closely.

Clutch torque characteristic curve with feature is reflected in pressure signal, and the pressure signal is in e measurement technology side Detect and assess by the pressure sensor of the inside in HCA in face.The typical pressure of the clutch of hydrostatic operation- Displacement characteristic curvilinear motion is shown in Fig. 4 curve A.

Figure 4 illustrates typical pressure-displacement characteristic curve of clutch working properly at room temperature.By positioned at The temperature of fluid in hydrostatic pressure system is improved, and clutch characteristics curve is subjected to the movement to relatively low actuator position, and this leads to Curve B is crossed to show --- required clutch engagement force is reached when actuator displacement is smaller by the fluid expansion in system Square.In hydrostatic pressure system leak when and/or in too early clutch abrasion by characteristic pressure-displacement characteristic curve to Higher actuator position movement, this is shown by curve C --- no longer reaches as the largest clutch torque needed for driver, This is reflected in driving performance in the way of it can experience.

In order to detect " leakage in hydrostatic path " and/or the failure cause of " too early clutch abrasion " and the two Difference between failure cause is it can be considered that multiple assessment mode：

A) observation is believed as the pressure of the function of the HCA actuator displacements in the case where actuator shift length is maximum Number：

Leakage in the clutch of abrasion and/or hydrostatic piece-rate system is characterised by the actuator position of maximum feasible Move the maximum pressure P (Smax) 1150,1180 reduced during Smax 1120.Pressure values P (Smax) C 1180 of the clutch of failure In the actuator displacement Smax 1120 of maximum feasible less than minimum pressure --- the default minimum pressure limiting value of restriction 1200 --- the minimum pressure is produced by the too early loss of the fluid that occurs and/or important clutch member.Phase Instead, the minimum pressure 1200 of the restriction of clutch working properly is in the case of Smax 1120 and yet in actuator position Less than being exceeded in the case of Smax by pressure signal P (Smax) A 1150.Therefore, in the maximum feelings of actuator displacement Smax 1120 When under condition less than the minimum pressure 1200 limited, cause can be the clutch of failure.

B) actuator path of the observation between clutch sample point and the actuator path of maximum feasible：

Alternative is in a), can assessing holding for clutch sample point TP 1130,1160 (it is forever adapted to) and maximum feasible Shift length between row device path Samx 1120.In the intact clutch of function, the range difference (S (TP) A 1140) Significantly more than in the clutch (S (TP) C 1170) of failure.Similar to a), therefore, it is possible to limit and preset boundary It is worth --- being herein alternate position spike boundary value 1210 ---, the alternate position spike boundary value is characterizing " hydrostatic road less than in the case of Leakage in footpath " and/or " too early clutch abrasion " and clutch working properly is represented in the case of exceeding.

This must be being handed under considering technical individual cases, especially in the case where considering to determine clutch size Art personnel determine the two boundary values --- minimum pressure boundary value 1200 and alternate position spike boundary value 1210.

C) the observation sampling Point matching in the case where considering change direction

Clutch controller is adapted to sample point during clutch is run, so that such as temperature of the service condition to change becomes Change, clutch abrasion etc. are made a response.By observing the change speed that the sample point is adapted in the case where considering change direction Degree (being important only to the sample point change of higher actuator position) can detect the clutch of failure.Excessive sample point becomes Change and represent " leakage in hydrostatic path " and/or " too early clutch abrasion ".Abrasion is long-term effect.Leakage is short-term effect Should.

D) pressure signal is observed in the case where actuator shift length is nearly constant

For detecting that another possibility of " leakage in hydrostatic path " provides nearly constant in actuator shift length In the case of observe pressure signal；In the case of a leak, quickly pressure is observed in the case of actuator position keeps identical Power drops --- and it is caused by the fluid appeared in hydrostatic pressure system.Finally, when position is nearly constant more than restriction most Big pressure drop values must be related to the leakage in system.

E) motor rotary speed is observed

Motor rotary speed can be assessed as another measurement parameter of the clutch for detecting failure.In clutch abrasion And/or when being leaked in hydrostatic pressure system, the clutch torque required for being not reaching to is entered without transmitting what is provided by motor Torque, this causes the rising of motor rotary speed or produces unexpected stroke turnover.If clutch is specified and actual torque not Motor rotary speed exceedes the positive rev limit value limited on initial speed with the case of, then cause is the clutch of failure Device system.

F) clutch friction value is observed

If clutch friction value changes gradient exceedes threshold value, then can release and exist sternly in clutch mating system Weight failure.

Appraisal procedure a) is former to the failure of " leakage in clutch system " and " clutch abrasion " to c) additionally allowing Therefore made a distinction between；(distance between maximum pressure, sample point and Smax at Smax is poor, sample point is fitted for measurement parameter With value) quick change expression system in leakage, and wear and tear clutch predict significantly slowerly.Therefore it is described by considering The fact can obtain the conclusion on failure cause by the variable gradient for assessing important measurement parameter.

Different measurement parameter (pressure signal, displacement signal, motor rotary speed) or evaluation clutch operating by assessing System model parameter (sample point numerical value, friction valve) being capable of making a distinction in normal work between the clutch of failure. , can be to " leakage in clutch system " and " clutch abrasion " in the case of considering measurement parameter history (variable gradient) Made a distinction between failure cause and then simplify the accident analysis in factory.

The present invention also relates to a kind of method and a kind of hydraulic pressure for being used to check the correct filling of the operating system of hydraulic pressure Operating system.

The present invention is for recognizing the hydrostatic operation system in production line end and/or running operation, especially hydrostatic Press the identification of the correct filling of clutch system.

Hydrostatic clutch system is implemented by clutch actuator, and the clutch actuator has pressure sensing Device, this shows in Fig. 1 for example in the A1 of DE 10 2,010 047 800 and the A1 of DE 10 2,010 047 801.Clutch Actuator is so-called hydrostatic clutch actuator HCA (Hydrostatic Clutch Actuator).It is this hydrostatic to hold Row device is it will be appreciated that be the actuator of such as pressure pipeline with hydraulic fluid with hydrostatic bang path.Pressure pipe Pressure in road is detected by pressure sensor.If the element being connected with this should be moved by hydrostatic actuator, that Hydraulic fluid is moved in bang path or pressure pipeline, for example, caused by master cylinder, and the master cylinder is to pass through hydraulic fluid The mode coupled moves slave cylinder.If element should be maintained in its position, then hydraulic fluid is quiet in bang path Only so that there is the hydrostatic pressure condition of hydraulic fluid, the actuator is named with the state.

Hydraulic clutch system, it is used for example as hydraulic clutch actuator (HCA) for the piece-rate system for clutch Necessary for the function of ensuring no problem but without air.Therefore, it is known to be equipped with hydraulic clutch segregative line Vacuum filling is carried out during the startup first of the motor vehicle of system.The auxiliary body of this consuming is generally not provided under maintenance condition, So that by means of corresponding factory provide preset realize hydraulic clutch release system relative to start first it is equivalent again The flow of filling.Here, being completely filled with the path to be filled always importantly, unrelated with the type of filling in filling And then in the absence of surplus air.Here, because component tolerance only can limitedly consider loading or fill the default of pressure.Its In in hydraulic path remain surplus air filling process can be according to prior art --- as its for example by document number be 10 2010 055 906.7 German patent application description --- the complete filling of system with no surplus air is no good enough Distinguish well.But, should can vehicle run during should only exist originally wherein hydraulic fluid bang path or This surplus air is detected in pressure pipeline.It is generally contemplated that following gaseous parts can be detected, the gaseous parts can It is located at or is formed in bang path or pressure pipeline.In principle, in order to export this gaseous part, provided with to balance hold The so-called blow vent of device --- passage is also referred to as, the blow vent is long-term in the prior art known and same in DE In the 10 2,010 047 800 A1 and A1 of DE 10 2,010 047 801 but also it is 10 2,011 103 in document number 774.1 German patent application described in.Therefore, clutch controller must move clutch actuator relative to blow vent Enter into specific position, enabling by via blow vent discharge connection between bang path and equalizing reservoir and The mode that can be deflated carries out the deflation of bang path.

(passed for clutch " standard state " (bang path does not include surplus air) and clutch " surplus air state " Path is passed comprising surplus air) situation, respectively the difference for pressure value P 1 and P2 two displacement differences drawn is extremely small so that Can not substantially and securely it be distinguished according to these situations of prior art.

Now, the present invention is based on following purposes, and researching and developing a kind of is used for the operating system, especially quiet of reliably identification hydraulic pressure The method of surplus air in hydraulic clutch system.

The purpose by according to the present invention it is a kind of be used for check hydraulic pressure operating system correct filling method with And realized by the operating system of the hydraulic pressure according to the present invention.

In terms of method and technology, the purpose is realized also by following methods.

According to the present invention it is proposed that the method for the correct filling of operating system (1) for checking hydraulic pressure, the behaviour of the hydraulic pressure Have as system：The piston that can be operated by control device by means of actuator in cylinder, for detect the pressure in cylinder first Sensor and for the second sensor for the position along actuator displacement for detecting actuator.It is proposed, according to the invention, that in order to The operating system that hydraulic pressure is correctly filled with pressure medium is checked, determines position-pressure indicatrix in indicatrix Default scope in maximum pressure gradient, and when identified maximum pressure gradient is more than default pressure gradient threshold During value, there is correct filling.

Proposed in the especially preferred form of implementation of the present invention, when maximum pressure gradient is less than pressure gradient threshold During value, there is incorrect filling.Air in the case of less than threshold value in systems or safety.The number of the threshold value The specific determination of value must hand those skilled in the art, since it is desired that considering technical individual cases.

Being proposed in another especially preferred form of implementation of the present invention, when there is incorrect filling, passing through control Equipment promotes to deflate.This directly carries out or carried out in next chance after.

Propose, pass through in the default position range around passage in another preferred form of implementation of the present invention Move clutch on closing direction to determine the pressure gradient of maximum along actuator displacement by means of actuator.Here, being Actuator displacement is determined for example it can be considered that the end face of the hydraulic fluid side of piston in cylinder.

Proposed in another preferred form of implementation of the present invention, hydraulic pressure is being refilled or be again filled with pressure medium Operating system after perform inspection to correctly filling.

Proposed in another especially preferred form of implementation of the present invention, the inspection to correctly filling is performed at regular intervals Look into the availability of the operating system to check hydraulic pressure.

Proposed in another preferred form of implementation of the present invention, by operating hydraulic pressure during specific travel situations Operating system performs inspection.

In terms of equipment and technology, the purpose is realized also by the operating system of following hydraulic pressure.

A kind of hydraulic control system is proposed according to the present invention, it has：In cylinder can be by control device by means of actuator The piston of operation, the first sensor for detecting the pressure in cylinder and for the second sensor for the position for detecting actuator. According to present invention proposition：Implement to be described above to check the operating system for correctly filling hydraulic pressure with pressure medium Method.

Fig. 5 is shown with displacement-pressure indicatrix for checking the important region marked；

Fig. 6 shows displacement-pressure characteristic curve in the pressure range of the bottom with maximum pressure gradient.

Liquid is schematically illustrated with the example of hydraulic pressure, the hydrostatic clutch actuator (HCA) schematically illustrated in Fig. 1 Press the structure of clutch system 1.Hydraulic clutch system 1 includes the control device 2 of control actuator 3 on master end 15.Holding Piston 19 in row device 3 and cylinder 4 along actuator displacement carry out position change to the right when, the volume change of cylinder 4, thus in cylinder 4 Middle formation pressure P, the pressure is transferred to the slave end of hydraulic clutch system 1 via pressure medium 7 by hydraulic pipeline 9 16.Hydraulic pipeline 9 is matched with the structure space situation of vehicle in terms of its length and shape.On slave end 16, in cylinder 4 The pressure P of pressure medium 7 causes change in displacement, and the change in displacement is delivered on clutch 8 with clutch described in convenient to operate. The pressure P in cylinder 4 on the master end 15 of hydraulic clutch system 1 can be detected by means of first sensor 5.First sensing Device 5 is preferably pressure sensor.Along the shift length passed through by actuator 3 of actuator displacement by means of second sensor 6 detections.

The present invention a form of implementation be for being closed in clutch in the case of directly commented in the region of passage Estimate the method for pressure rising.

Displacement-pressure indicatrix 310 is determined in the case where clutch is closed, this displacement-pressure indicatrix exists Shown in Fig. 5.Figure 5 illustrates disconnected with the clutch closure (upper curve) and clutch to this typical hesitation Open (lower curve).In fig. 5, it is shown that the region marked with ellipse 360, the region is for being weight according to the inspection of the present invention Want.In order to reduce interference effect, not Direct Analysis displacement and pressure signal 310, but 320 (examples are somewhat filtered to it Such as PT1 filtering), such as this, figure 6 illustrates enlargedly show the important region relative to Fig. 5 in figure 6.

If also there is air in hydraulic path, then obtain small in the region of passage when closing clutch Pressure gradient.Two kinds of alternatives A and B are provided in order to assess：

A is compared pressure gradient with fixed default threshold value in fixed pressure (such as 2bar).Less than threshold value In the case of, air in system or safety.This is passed to clutch controller, therefore, it is possible to start further to put Gas.Therefore according to moving curve A, direction of the clutch actuator 3 along closure clutch is moved in certain position so that deposited In the default pressure in preferably 0.5 to 6bar pressure range, particularly preferably there is default 2bar pressure.At this In position, for example, pressure gradient is determined from the displacement and pressure values that are measured before directly, or as an alternative in default pressure In the range of implement the small movement on the direction of closure clutch, to obtain for determining the pressure in default pressure range The measured value of strong gradient.The identified pressure gradient is applicable as maximum pressure gradient for other moving curve.Connect Get off, identified maximum pressure gradient is compared with default pressure gradient threshold value.If identified maximum pressure ladder The numerical value of degree is more than default pressure gradient threshold value, then cause is that gaseous part is not present in bang path.It is default The specific determination of the numerical value of pressure and the specific determination of the numerical value of pressure gradient threshold value must also hand ability herein Field technique personnel, since it is desired that the individual cases of the operating system of the hydraulic pressure of consideration clutch and gaseous parts are on pressure Characteristic.Here, those skilled in the art's preset pressure value, surrounds the pressure to be expected of passage in the case of the pressure value Gradient is especially big.

B. in lower position region (such as when the end face of the hydraulic fluid side of the piston 19 in cylinder 4 is in the extension of blow vent 18 Region in when for around the region of the extension of passage) and/or bottom pressure range (such as 0-5bar) in determine warp The maximum pressure gradient 330 of the displacement of filtering-pressure indicatrix 320 (referring to Fig. 6).The maximum pressure gradient and fixation Default threshold value compares.When less than threshold value, air in systems or safety.This is passed to clutch control, because This can start further deflation.Therefore according to moving curve B, direction of the clutch actuator 3 along closure clutch is moved Move in certain position so that the end face of the hydraulic fluid side of the piston 19 in cylinder 4 is located at the default of the region of the extension of blow vent 18 The band of position section start, wherein passage extension region representation surround passage the band of position, in institute's rheme Put can rule of thumb expect in region maximum pressure gradient, such as example in Fig. 5 or Fig. 6 preferably -2.5mm to+ It is such case in the 2.0mm band of position.As alternative or in addition to preset position area, clutch actuator 3 It is moved upwards up in certain position, exists in the position especially excellent from preferably 0 to 7.5bar in the side of closure clutch Select the minimum pressure (section start of default pressure range) in the pressure range between 0bar and 5.5bar.In the expansion of blow vent In the default band of position in the region of exhibition or as an alternative in default pressure range or as an alternative in the presence of from default The position of the band of position and when there is pressure in default pressure range, determines to be present in corresponding by following manner Default region in maximum pressure gradient：--- on the direction of closure clutch --- pass through institute i.e. by means of actuator State default region and determine displacement-pressure indicatrix, next determined from the displacement-pressure indicatrix default The maximum pressure gradient in region.Next, identified maximum pressure gradient is compared with default pressure gradient threshold value Preferably have compared with, the pressure gradient threshold value with according to moving curve A identical numerical value.If identified maximum pressure ladder The numerical value of degree is more than default pressure gradient threshold value, then --- such as in moving curve A --- cause is in bang path In be not present gaseous part.The tool of specific determination, default pressure range around the default band of position of passage The determination of body and the specific determination of the numerical value of pressure gradient threshold value must also hand those skilled in the art herein, because Need to consider the characteristic on pressure of technical individual cases and gaseous parts of the operating system of the hydraulic pressure of clutch. This, those skilled in the art's preset pressure value, the pressure gradient to be expected around passage in the pressure value is especially big.

Inspection can be at the production line end in vehicle and/or speed changer factory and in the running operation just carried out Perform.

As an alternative, also it check that, if reach required maximum pressure when closing clutch.The inspection is relatively simple It is single and effective.However, the recognizable residual air capacity in hydraulic system is noticeably greater than in the method with pressure gradient.

Propose a kind of for recognizing hydrostatic clutch according to the assessment to pressure gradient and/or maximum achievable pressure The method of the correct filling of device system.

Reference numerals list

1 hydraulic clutch system

2 control devices

3 actuators

4th, 4 ' cylinder

5 first sensors

6 second sensors

7 pressure mediums

8 clutches

9 hydraulic pipelines

10 displacements-pressure indicatrix

15 master ends

16 slave ends

17 equalizing reservoirs

18 blow vents

19 pistons

320 filtered displacements-pressure indicatrix

The maximum pressure gradient of 330 filtered displacements-pressure indicatrix

340 pressure [bar]

350 actuator displacements [mm]

360 marks

110 displacements-pressure indicatrix

120 displacements-pressure indicatrix

130 displacements-pressure indicatrix

140 displacements-pressure indicatrix

150 actuator positions [mm], displacement

160 pressure [bar]

170 maximum actuator positions

180 maximum pressure

The 210 maximum pressure gradient in the pressure range of the bottom of displacement-pressure indicatrix 110

The 220 maximum pressure gradient in the pressure range of the bottom of displacement-pressure indicatrix 120

The 230 maximum pressure gradient in the pressure range of the bottom of displacement-pressure indicatrix 130

The 240 maximum pressure gradient in the pressure range of the bottom of displacement-pressure indicatrix 140

250 threshold values

260 marks

270 maximum pressure gradients [bar/mm]

A pressure-displacement characteristic curve " clutch of normal work at room temperature "

B pressure-displacement characteristic curve " clutch of the normal work at a temperature of raising "

C pressure-displacement characteristic curve " clutch of failure "

1100 pressure [bar]

1110 actuator displacements [mm]

1120 Smax

1130 TP A

1140 S(TP)A

1150 P(Smax)A

1160 TP C

1170 S(TP)C

1190 P(Smax)C

1200 minimum pressure boundary values

1210 alternate position spike boundary values

Claims

1. a kind of method for being used to check the correct filling of the operating system (1) of hydraulic pressure, the operating system has：In cylinder (4) In the piston (19) that can be operated by control device (2) by means of actuator (3)；For detecting the pressure in the cylinder (4) First sensor (5)；With the second sensor (6) for detecting position of the actuator (3) along actuator displacement, it is special Levy and be, following inspections are implemented in order to be checked the operating system (1) that the hydraulic pressure is correctly filled with pressure medium (7) Look into step：

The actuator (3) is moved to default, maximum actuator position (170) and the maximum execution is detected The pressure at device position (170) place, the pressure detected is compared with default maximum pressure value (180), wherein when being examined When the pressure of survey is consistent within first margin of tolerance with default maximum pressure value (180), the checking step is considered as into What work(was performed,

The maximum pressure of position-pressure indicatrix (110,120,130,140) is determined in the default region of indicatrix Strong gradient (210,220,230,240), wherein when identified maximum pressure gradient (210,220,230,240) is considering the When being more than default pressure gradient threshold value (250) in the case of two margins of tolerance, the checking step is considered as successful execution,

Position-pressure indicatrix is determined until there are two position-pressure indicatrixes (110,120), by the two institutes Rheme puts-and pressure indicatrix (110,120) is compared, wherein when the two positions-pressure indicatrix (110,120) exists When consistent within 3rd margin of tolerance, the checking step is considered as successful execution,

2. according to the method described in claim 1, it is characterised in that the two positions-pressure feature determined in succession in time Implement the comparison of two position-pressure indicatrixes (110,120) on curve (110,120).

3. method according to claim 1 or 2, it is characterised in that implement two position-pressure indicatrixes The comparison of (110,120) so that determine whether there is two positions-pressure indicatrix (110,120) to each other inclined Move.

4. method according to claim 1 or 2, it is characterised in that implement two position-pressure indicatrixes The comparison of (110,120) so that it is determined that, if in rear defined location-pressure indicatrix (110,120) phase on time of occurrence For being moved on the time in preceding defined location-pressure indicatrix (110,120) towards smaller actuator position.

5. method according to claim 1 or 2, it is characterised in that compared by comparing two positional values to perform, described Positional value respectively from two position-pressure indicatrixes (110,120) it is common, default compare obtained at pressure values Go out.

6. method according to claim 1 or 2, it is characterised in that compared by comparing two sample points to perform, described Sample point is drawn from two position-pressure indicatrixes in (110,120) respectively.

7. method according to claim 1 or 2, it is characterised in that when there is incorrect filling, passes through the control Equipment (2) promotes to deflate.

8. method according to claim 1 or 2, it is characterised in that by being held by means of the actuator (3) along described Row device displacement moves clutch to determine the pressure gradient of maximum on closing direction.

9. method according to claim 1 or 2, it is characterised in that in the default position range around passage (18) It is interior determined by moving clutch on closing direction along the actuator displacement by means of the actuator (3) maximum Pressure gradient.

10. method according to claim 1 or 2, it is characterised in that in the case of default pressure values by by means of The actuator (3) moves clutch to determine the pressure gradient of maximum along the actuator displacement on closing direction, its In default pressure values between 0.5bar and 6bar.

11. method according to claim 1 or 2, it is characterised in that by by means of described in default pressure range Actuator (3) moves clutch to determine the pressure gradient of maximum along the actuator displacement on closing direction.

12. method according to claim 11, it is characterised in that the default pressure range is 0bar to 7.5bar.

13. method according to claim 11, it is characterised in that the default pressure range is 0bar to 5.5bar.

14. method according to claim 1 or 2, it is characterised in that refilled with the pressure medium (7) or again The correct filling is checked after the operating system (1) of the secondary filling hydraulic pressure.

15. a kind of operating system of hydraulic pressure (1), with cylinder (4) can be grasped by control device (2) by means of actuator (3) The piston (19) of work, the first sensor (5) for detecting the pressure in the cylinder (4) and for detecting the actuator (3) Position second sensor (6), it is characterised in that for the operation to correctly filling the hydraulic pressure with pressure medium (7) System (1) is checked and implements the method according to any one of the claims.

16. the operating system (1) of hydraulic pressure according to claim 15, it is characterised in that the operating system (1) of the hydraulic pressure It is the clutch actuation system (1) of hydraulic pressure or the transmission operating system of hydraulic pressure.

17. a kind of be used to carry out in the clutch actuation system (1) of hydraulic pressure and in the friction clutch (8) operated whereby The method of fault detect, wherein the clutch actuation system (1) of the hydraulic pressure has：In the cylinder (4) with pressure medium (7) The piston (19) that can be operated by control device (2) by means of actuator (3)；Pressure for detecting the pressure medium (7) First sensor (5)；With the second sensor (6) for detecting position of the actuator (3) along actuator displacement, its It is characterised by, when meeting one or more of following conditions, recognizes in the clutch actuation system (1) of the hydraulic pressure Or the failure in the friction clutch (8) operated whereby：

The pressure of predetermined position of the pressure medium (7) in the actuator (3) is less than default minimum pressure border It is worth (1200),

It is pre- on the position of the current sample point (1130,1160) of the clutch (8) and the actuator displacement If the distance between position be less than default alternate position spike boundary value (1210),

The sample point of the clutch was determined within the default period terminated with the time point of last determination The pace of change of numerical value is more than default sample point pace of change boundary value,

When the clutch torque from default initial clutch rated moment improves specified to other default clutch During torque, motor rotary speed is more than initial speed and default motor rotary speed boundary value sum,

When the determination within the default period terminated with the time point of last determination of the friction valve of the clutch Numerical value pace of change exceed default friction valve pace of change boundary value when.

18. method according to claim 17, it is characterised in that temporal in the case of constant in actuator position When pressure drop is more than default pressure drop boundary value, the failure in the clutch actuation system (1) of the hydraulic pressure is recognized.

19. method according to claim 17, it is characterised in that when meeting one or more of following conditions, knows It is clipped to the failure in the clutch actuation system (1) of the hydraulic pressure：

Temporal pressure drop in the case where actuator position is constant at the default position of the actuator (3) is big In default leakage-pressure drop boundary value,

In the sample point (1130,1160) and the actuator accordingly current in time course of the clutch (8) The temporal change of the distance between default position in displacement is more than default leak position difference change boundary value (1210),

The sample point of the clutch was determined within the default period terminated with the time point of last determination The pace of change of numerical value is more than default leakage sample point pace of change boundary value.

20. the method according to claim 17 or 18, it is characterised in that when meeting one or more of following conditions When, recognize the failure in the friction clutch (8) operated by the clutch actuation system of the hydraulic pressure (1)：

Pressure of the pressure medium (7) on the default position of the actuator (3) is less than default minimum pressure side Dividing value (1200), and on the time in the case that actuator position is constant on the default position of the actuator (3) Pressure drop be less than default leak pressure drop boundary value,

It is default on the position of the current sample point (1130,1160) of the clutch (8) and the actuator displacement The distance between position be less than default alternate position spike boundary value (1210), and in the clutch (8) in time course In corresponding current sample point (1130,1160) and the distance between the default position in the actuator displacement when Between on change be less than default leak position difference change boundary value (1210),

The sample point of the clutch was determined within the default period terminated with the time point of last determination The pace of change of numerical value be more than default sample point pace of change boundary value, and the sample point of the clutch with last Determination default period for terminating at time point within the pace of change of numerical value that determines be less than default leakage sample point Pace of change boundary value.

21. the method according to claim 17 or 19, it is characterised in that the default position in the actuator displacement It is the maximum actuator displacement (1120) on the direction of closure clutch to put.

22. the method according to claim 17 or 19, it is characterised in that only consider two successive in time sample points It is determined that between clutch close direction on sample point change.

23. method according to claim 17, it is characterised in that according to initial speed and/or in default clutch volume Determine the torque difference between torque and initial clutch rated moment to determine default motor rotary speed boundary value.

24. method according to claim 19, it is characterised in that according to the default position of the actuator (3) come really The fixed leakage-pressure drop boundary value and/or minimum pressure boundary value (1200).

25. method according to claim 19, it is characterised in that the sample point pace of change boundary value is less than described let out Leak sample point pace of change boundary value.

26. a kind of method for being used to check the correct filling of the operating system (1) of hydraulic pressure, the operating system of the hydraulic pressure has： The piston (19) that can be operated by control device (2) by means of actuator (3) in cylinder (4)；For detecting in the cylinder (4) The first sensor (5) of pressure；With the second sensor for detecting position of the actuator (3) along actuator displacement (6), it is characterised in that in order to check the operating system (1) that the hydraulic pressure is correctly filled with pressure medium (7), really - maximum pressure gradient of the pressure indicatrix in the default scope of indicatrix is put in positioning, and when identified maximum Pressure gradient be more than default pressure gradient threshold value when, there is correct filling, wherein by by means of the actuator (3) Clutch is moved on closing direction along the actuator displacement to determine the pressure gradient (330) of maximum.

27. method according to claim 26, it is characterised in that when the maximum pressure gradient is less than pressure ladder When spending threshold value, there is incorrect filling.

28. method according to claim 27, it is characterised in that when there is incorrect filling, passes through the control Equipment (2) promotes to deflate.

29. the method according to any one of claim 26 to 28, it is characterised in that around the pre- of passage (18) If position range in by by means of the actuator (3) along the actuator displacement moved on closing direction it is described from Clutch come determine maximum pressure gradient (330).

30. the method according to any one of claim 26 to 28, it is characterised in that in the situation of default pressure values Under determined most by moving the clutch on closing direction along the actuator displacement by means of the actuator (3) Big pressure gradient (330), wherein default pressure values are between 0.5bar and 6bar.

31. the method according to any one of claim 26 to 28, it is characterised in that lead in default pressure range Cross by means of the actuator (3) and to move the clutch on closing direction along the actuator displacement to determine maximum Pressure gradient (330).

32. method according to claim 31, it is characterised in that the default pressure range is 0bar to 7.5bar.

33. method according to claim 31, it is characterised in that the default pressure range is 0bar to 5.5bar.

34. the method according to any one of claim 26 to 28, it is characterised in that with the pressure medium (7) Refill or be again filled with to check the correct filling after the operating system (1) of the hydraulic pressure.

35. a kind of operating system of hydraulic pressure (1), it has：In cylinder (4) can be by control device (2) by means of actuator (3) The piston (19) of operation；First sensor (5) for detecting the pressure in the cylinder (4)；With for detecting the actuator (3) second sensor (6) of position, it is characterised in that for the behaviour to correctly filling the hydraulic pressure with pressure medium (7) Make system (1) to be checked and implement the method according to any one of the claims.

36. the operating system (1) of hydraulic pressure according to claim 35, it is characterised in that the operating system (1) of the hydraulic pressure It is the clutch actuation system (1) of hydraulic pressure or the transmission operating system of hydraulic pressure.