CN110230692A - A kind of method and device updating main slave cylinder thrust ratio and speed ratio relational graph - Google Patents
A kind of method and device updating main slave cylinder thrust ratio and speed ratio relational graph Download PDFInfo
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- CN110230692A CN110230692A CN201810180413.0A CN201810180413A CN110230692A CN 110230692 A CN110230692 A CN 110230692A CN 201810180413 A CN201810180413 A CN 201810180413A CN 110230692 A CN110230692 A CN 110230692A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0262—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being hydraulic
- F16H61/0265—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being hydraulic for gearshift control, e.g. control functions for performing shifting or generation of shift signals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/66—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings
- F16H61/662—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings with endless flexible members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H2061/0053—Initializing the parameters of the controller
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H2061/0075—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by a particular control method
- F16H2061/0096—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by a particular control method using a parameter map
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/66—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings
- F16H61/662—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings with endless flexible members
- F16H2061/66204—Control for modifying the ratio control characteristic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/66—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings
- F16H61/662—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings with endless flexible members
- F16H61/66272—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings with endless flexible members characterised by means for controlling the torque transmitting capability of the gearing
- F16H2061/66277—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings with endless flexible members characterised by means for controlling the torque transmitting capability of the gearing by optimising the clamping force exerted on the endless flexible member
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention discloses a kind of methods for updating main slave cylinder thrust ratio and speed ratio relational graph, this method comprises: at the time of the first moment was that speed changingratio is corresponded to less than the second preset value, speed changingratio from the first moment in preset time is respectively less than third preset value, second moment be the first moment after preset time at the time of, when the speed ratio average rate of change calculates practical main slave cylinder thrust ratio by active cylinder pressure and slave cylinder oil pressure less than the first preset value in the period at two moment；When actually within a preset range, update obtains the main slave cylinder thrust ratio of target and speed ratio relational graph to the difference of main slave cylinder thrust ratio and the main slave cylinder thrust ratio of target.It can be seen that, the same main slave cylinder thrust ratio and speed ratio relational graph are not used, but main slave cylinder thrust ratio and speed ratio relational graph are updated according to practical speed ratio situation, and then control the speed ratio of CVT, different gearboxes and same gearbox thrust ratio otherness can be covered, the accuracy of control speed ratio is improved.
Description
Technical field
The present invention relates to car data analysis processing technology field more particularly to a kind of main slave cylinder thrust ratios of update and speed
Than the method and device of relational graph.
Background technique
Stepless transmission (English: Continuously Variable Transmission, referred to as: CVT) using transmission
The driven wheel that band and working diameter can be changed matches to transmit power, as a kind of novel power-shift transmission, has
Driving comfort, discharge is low, fuel economy is good, realizes the advantages that stepless shift, has good market prospects.Especially CVT
Vehicle travel resistance and engine loading can be made to realize dynamic best match, remain hair by the consecutive variations of speed ratio
Motivation is operated in high efficient district, and the potentiality of engine are performed to optimum state according to the operation of driver intention.
In the prior art, engine target rotating speed is determined according to accelerator open degree and speed, then by engine target rotating speed and
Output shaft of gear-box revolving speed can determine the goals ratio of CVT.And want control CVT and reach goals ratio, it is necessary to control master
Dynamic cylinder pressure and the ratio of slave cylinder pressure reach the corresponding numerical value of goals ratio, that is, according to main slave cylinder thrust ratio and speed ratio
Relational graph controls the speed ratio of CVT by controlling main slave cylinder thrust ratio.
Inventor has found that the prior art is according to the same main slave cylinder thrust ratio and speed ratio relational graph, control
It makes main slave cylinder thrust ratio and then controls the speed ratio of CVT.However, main slave cylinder thrust ratio and speed ratio relationship will receive oil temperature, folder
Clamp force safety coefficient, the influence of driving belt pulley shaft revolving speed or same gearbox steel band and the cone abrasion of disk, vehicle mileage
Increase and the influence of gearbox abrasion, or different gearbox because the factors such as size and assembling deviation influence, the thrust ratio
It can change with speed ratio relationship, main slave cylinder thrust ratio and speed ratio relational graph and actual conditions have deviation.At this time according further to
The same main slave cylinder thrust ratio and speed ratio relational graph control main slave cylinder thrust ratio and then control the speed ratio of CVT, will cause control
It produces speed ratio to be inaccurate, that is to say, that different transmission hardware deviations and the durable deviation of same gearbox will affect control speed
The accuracy of ratio.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of sides for updating main slave cylinder thrust ratio and speed ratio relational graph
Method and device cover different transmission hardware deviations and the durable deviation of same gearbox, improve the accuracy of control speed ratio.
In a first aspect, the embodiment of the invention provides a kind of method for updating main slave cylinder thrust ratio and speed ratio relational graph,
This method comprises:
If the speed ratio average rate of change is less than the first preset value in the period at the first moment to the second moment, according to active cylinder
Pressure and slave cylinder oil pressure determine practical main slave cylinder thrust ratio；First moment is that speed changingratio is default less than second
At the time of value is corresponding, second moment be first moment after preset time at the time of, from first moment
Speed changingratio in the preset time is respectively less than third preset value, and the third preset value is greater than second preset value,
Second preset value is greater than first preset value；
If the difference of the main slave cylinder thrust ratio of reality and the main slave cylinder thrust ratio of target within a preset range, updates
To the main slave cylinder thrust ratio of target and speed ratio relational graph, the main slave cylinder thrust of target is determined by goals ratio.
Preferably, the method that the speed ratio average rate of change obtains in first moment to the period at the second moment, comprising:
Obtain speed changingratio；
If the speed changingratio is less than second preset value, it is determined as institute at the time of the speed changingratio is corresponded to
It stated for the first moment, and obtains the first moment speed ratio；
If speed changingratio is respectively less than the third preset value in the preset time from first moment, and by institute
It stated for the first moment after preset time period, is determined as described at the time of by first moment after the preset time
Two moment, and obtain the second moment speed ratio；
According to first moment, second moment, the first moment speed ratio, the second moment speed ratio, obtain
The speed ratio average rate of change in first moment to the period at the second moment.
Preferably, described according to active cylinder pressure and slave cylinder oil pressure, determine practical main slave cylinder thrust ratio, comprising:
By active cylinder and the corresponding sensor of slave cylinder, active cylinder pressure and slave cylinder oil pressure are obtained；
The ratio of active cylinder pressure and slave cylinder oil pressure is determined as practical main slave cylinder thrust ratio.
Preferably, further includes:
If the speed ratio average rate of change is greater than the first preset value or from described the in the period at the first moment to the second moment
Speed changingratio from one moment in the preset time is greater than third preset value, by original main slave cylinder thrust ratio and speed ratio
Relational graph is determined as the main slave cylinder thrust ratio of target and speed ratio relational graph.
Preferably, further includes:
If the difference of the main slave cylinder thrust ratio of reality and the main slave cylinder thrust ratio of target is not within a preset range, will be former
The main slave cylinder thrust ratio and speed ratio relational graph having are determined as the main slave cylinder thrust ratio of target and speed ratio relational graph.
Second aspect, the embodiment of the invention provides a kind of device for updating main slave cylinder thrust ratio and speed ratio relational graph,
It is characterised by comprising:
First determination unit, if for the speed ratio average rate of change in the period at the first moment to the second moment less than first
Preset value determines practical main slave cylinder thrust ratio according to active cylinder pressure and slave cylinder oil pressure；First moment is speed ratio change
At the time of rate is corresponded to less than the second preset value, second moment be first moment after preset time at the time of,
Speed changingratio from first moment in the preset time is respectively less than third preset value, and the third preset value is greater than
Second preset value, second preset value are greater than first preset value；
Updating unit, if for the difference of the main slave cylinder thrust ratio of the reality and the main slave cylinder thrust ratio of target default
In range, update obtains the main slave cylinder thrust ratio of target and speed ratio relational graph, and the main slave cylinder thrust of target is by goals ratio
It determines.
Preferably, first determination unit includes the first acquisition subelement, and described first, which obtains subelement, includes first
It obtains module, the first determining acquisition module, the second determining module and second that obtains and obtains module；
Described first obtains subelement, speed ratio mean change in the period for obtaining the first moment to the second moment
Rate；
Described first obtains module, for obtaining speed changingratio；
Described first determines acquisition module, if being less than second preset value for the speed changingratio, by the speed
It is determined as first moment at the time of correspondence than change rate, and obtains the first moment speed ratio；
Described second determines acquisition module, if for speed changingratio to be equal in the preset time from first moment
Less than the third preset value, and by first moment after preset time period, by first moment by described pre-
If being determined as second moment at the time of after the time, and obtain the second moment speed ratio；
It is described second obtain module, for according to first moment, second moment, the first moment speed ratio,
The second moment speed ratio obtains the speed ratio average rate of change in the period at first moment to the second moment.
Preferably, first determination unit includes that the second acquisition subelement and first determine subelement；
Described second obtains subelement, for obtaining active cylinder pressure by active cylinder and the corresponding sensor of slave cylinder
With slave cylinder oil pressure；
Described first determines subelement, moves for the ratio of active cylinder pressure and slave cylinder oil pressure to be determined as practical principal and subordinate
Cylinder thrust ratio.
Preferably, further includes:
Second determination unit, if being greater than first for the speed ratio average rate of change in the period at the first moment to the second moment
Preset value or the speed changingratio from first moment in the preset time are greater than third preset value, by original principal and subordinate
Dynamic cylinder thrust ratio and speed ratio relational graph are determined as the main slave cylinder thrust ratio of target and speed ratio relational graph.
Preferably, further includes:
Third determination unit, if not for the difference of the main slave cylinder thrust ratio of the reality and the main slave cylinder thrust ratio of target
Within a preset range, original main slave cylinder thrust ratio and speed ratio relational graph are determined as the main slave cylinder thrust ratio of target and speed ratio
Relational graph.
Compared with prior art, the present invention has at least the following advantages:
Using the technical solution of the embodiment of the present invention, as at the time of speed changingratio is corresponded to less than the second preset value
One moment, the speed changingratio from first moment in the preset time are respectively less than third preset value, when described first
As the second moment at the time of quarter after preset time, when speed ratio mean change in the period at the first moment to the second moment
Rate can calculate practical main slave cylinder thrust ratio less than the first preset value, by active cylinder pressure and slave cylinder oil pressure；When described
The difference of practical main slave cylinder thrust ratio and the main slave cylinder thrust ratio of target within a preset range, can update to obtain target principal and subordinate
Dynamic cylinder thrust ratio and speed ratio relational graph.It can be seen that the same main slave cylinder thrust ratio and speed ratio relational graph are not used, but
Main slave cylinder thrust ratio and speed ratio relational graph are updated according to practical speed ratio situation, main slave cylinder is controlled according to updated relational graph
Thrust ratio and then the speed ratio for controlling CVT, cover different gearbox thrust ratio othernesses and same gearbox thrust ratio otherness,
Improve the accuracy of control speed ratio.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other attached drawings.
The main slave cylinder thrust ratio of Fig. 1 and speed ratio relational graph；
Influence diagram of the main slave cylinder thrust ratio of Fig. 2 to Transmission Ratio Control；
Fig. 3 is system framework schematic diagram involved in application scenarios a kind of in the embodiment of the present invention；
Fig. 4 is a kind of process of method for updating main slave cylinder thrust ratio and speed ratio relational graph provided in an embodiment of the present invention
Schematic diagram；
Fig. 5 is the stream of another method for updating main slave cylinder thrust ratio and speed ratio relational graph provided in an embodiment of the present invention
Journey schematic diagram；
Fig. 6 is a kind of structure of device for updating main slave cylinder thrust ratio and speed ratio relational graph provided in an embodiment of the present invention
Schematic diagram.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only this
Invention a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
CVT is mainly made of driving wheel, driven wheel, metal tape, active cylinder, slave cylinder etc., under normal conditions: slave cylinder root
Its pressure is determined according to steel band transmitting torque and practical speed ratio, and to guarantee that steel band is capable of the transmitting torque of safety, i.e. slave cylinder is negative
Blame clamping force.Active cylinder determines its pressure according to goals ratio and slave cylinder oil pressure, to guarantee that practical speed ratio follows target fast
Than that is, active cylinder is responsible for Transmission Ratio Control.
In the prior art according to main slave cylinder thrust ratio as shown in Figure 1 and speed ratio relational graph, pushed away by controlling main slave cylinder
Power ratio, that is, the ratio of active cylinder pressure and slave cylinder pressure, and then control speed ratio, the as shown in Figure 2 relationship of thrust ratio and speed ratio
In non-linear relation, different speed ratios correspond to different thrust ratios, and the smaller then speed ratio of the thrust ratio of active cylinder and slave cylinder is bigger.
However inventor has found that the prior art is according to the same main slave cylinder thrust ratio and speed ratio relationship
Figure controls main slave cylinder thrust ratio and then controls the speed ratio of CVT.But main slave cylinder thrust ratio will receive with speed ratio relationship
The abrasion of oil temperature, clamping force safety coefficient, the influence of driving belt pulley shaft revolving speed or same gearbox steel band and cone disk, vehicle
The influence of the increase of mileage number and gearbox abrasion, or different gearboxes because the factors such as size and assembling deviation influence,
The thrust ratio can change with speed ratio relationship, and main slave cylinder thrust ratio and speed ratio relational graph and actual conditions have deviation.At this time
According further to the same main slave cylinder thrust ratio and speed ratio relational graph, controls main slave cylinder thrust ratio and then controls the speed ratio of CVT,
It will cause and control out speed ratio and be inaccurate, that is to say, that different transmission hardware deviations and the durable deviation of same gearbox can shadows
Ring the accuracy of control speed ratio.By theory analysis or experiment test can obtain as shown in Figure 2 main slave cylinder thrust ratio to speed ratio control
The influence diagram of system, by spitting it is found that actual thrust is than bigger than normal, then practical speed ratio is less than normal, practical fast if actual thrust is than less than normal
Than bigger than normal.
In order to solve this problem, in embodiments of the present invention, when speed changingratio is corresponding less than the second preset value
It carves and was used as the first moment, the speed changingratio from first moment in the preset time is respectively less than third preset value, institute
As the second moment at the time of stating for the first moment after preset time, when speed ratio in the period at the first moment to the second moment
The average rate of change can calculate practical main slave cylinder thrust less than the first preset value, by active cylinder pressure and slave cylinder oil pressure
Than；When the main slave cylinder thrust ratio of the reality and the main slave cylinder thrust ratio of target difference within a preset range, can update
To the main slave cylinder thrust ratio of target and speed ratio relational graph.It can be seen that not using the same main slave cylinder thrust ratio and speed ratio
Relational graph, but main slave cylinder thrust ratio and speed ratio relational graph are updated according to practical speed ratio situation, according to updated relational graph
It controls main slave cylinder thrust ratio and then controls the speed ratio of CVT, cover different gearbox thrust ratio othernesses and same gearbox
Thrust ratio otherness improves the accuracy of control speed ratio.
For example, one of the scene of the embodiment of the present invention, can be applied in scene as shown in Figure 3.The scene
In include sensor 301, processor 302, controller 303.Processor 302 obtains the first speed ratio, the second speed by sensor 301
Than, active cylinder pressure and slave cylinder oil pressure, if the speed ratio average rate of change is less than in the period at the first moment to the second moment
One preset value, processor 302 determine practical main slave cylinder thrust ratio according to active cylinder pressure and slave cylinder oil pressure；Described first
At the time of moment is that speed changingratio is corresponded to less than the second preset value, second moment is when passing through default at first moment
Between after at the time of, the speed changingratio from first moment in the preset time is respectively less than third preset value, described the
Three preset values are greater than second preset value, and second preset value is greater than first preset value；If the practical principal and subordinate is dynamic
Within a preset range, the update of processor 302 obtains the main slave cylinder of target to the difference of cylinder thrust ratio and the main slave cylinder thrust ratio of target
Thrust ratio and speed ratio relational graph；According to the obtained main slave cylinder thrust ratio of target and speed ratio relational graph is updated, controller 303 passes through
It controls main slave cylinder thrust ratio and then controls speed ratio.
It is understood that in above-mentioned application scenarios, although by the action description of embodiment of the present invention by processor
302 execute.The present invention is unrestricted in terms of executing subject, as long as performing movement disclosed in embodiment of the present invention i.e.
It can.
It is understood that above-mentioned scene is only a Sample Scenario provided in an embodiment of the present invention, the embodiment of the present invention
It is not limited to this scene.
With reference to the accompanying drawing, main slave cylinder thrust ratio and speed are updated by embodiment in the present invention will be described in detail embodiment
Than the specific implementation of the method and device of relational graph.
Illustrative methods
Referring to fig. 4, a kind of method for updating main slave cylinder thrust ratio and speed ratio relational graph in the embodiment of the present invention is shown
Flow diagram.In the present embodiment, the method for example may comprise steps of:
Step 401: if the speed ratio average rate of change is less than the first preset value, root in the period at the first moment to the second moment
According to active cylinder pressure and slave cylinder oil pressure, practical main slave cylinder thrust ratio is determined；First moment is less than for speed changingratio
At the time of second preset value corresponds to, second moment be first moment after preset time at the time of, from described the
Speed changingratio from one moment in the preset time is respectively less than third preset value, and the third preset value is greater than described second
Preset value, second preset value are greater than first preset value.
In practical application, the present embodiment is the speed ratio average rate of change within the period for obtaining the first moment to the second moment
Under the premise of, judge whether to meet the condition in the step 401, and speed ratio is flat in the period at the first moment to the second moment
Equal change rate is that the speed ratio difference and time difference by the first moment and the second moment are divided by calculate and are obtained, and the first moment and second
Moment is the real-time speed changingratio for first calculating acquisition, then judges real-time speed changingratio compared with preset value and when presetting
Between determine.Therefore, in some embodiments of the present embodiment, speed ratio in the period at first moment to the second moment
The method that the average rate of change obtains, comprising: obtain speed changingratio；If the speed changingratio is less than second preset value,
It is determined as first moment at the time of speed changingratio is corresponded to, and obtains the first moment speed ratio；If from described first
Speed changingratio is respectively less than the third preset value in the preset time from moment, and by first moment by it is default when
Between after section, when being determined as second moment at the time of by first moment after the preset time, and obtaining second
Carve speed ratio；According to first moment, second moment, the first moment speed ratio, the second moment speed ratio, institute is obtained
State the speed ratio average rate of change in the period at the first moment to the second moment.
Wherein, the second preset value and third preset value are pre-set calibration value, and the second preset value for example can be close to
In zero, when speed changingratio is less than the second preset value, it is stable to be approximately considered speed ratio at this time, is in unchanged state；Third
Preset value is less times greater than the second preset value, when speed changingratio is less than third preset value, thinks speed ratio also in stablizing shape at this time
State.
It should be noted that pressure sensor can be installed on active cylinder, slave cylinder, it can be straight by pressure sensor
Obtain to obtain active cylinder pressure and slave cylinder oil pressure.In some embodiments of the present embodiment, it is described according to active cylinder pressure and
Slave cylinder oil pressure determines practical main slave cylinder thrust ratio, comprising: by active cylinder and the corresponding sensor of slave cylinder, led
Dynamic cylinder pressure and slave cylinder oil pressure；The ratio of active cylinder pressure and slave cylinder oil pressure is determined as practical main slave cylinder thrust ratio.
In practical applications, the condition that may be unsatisfactory in step 401, that is to say, that may the first moment to second when
In the period at quarter the speed ratio average rate of change be greater than the first preset value, or may from first moment the preset time
Interior speed changingratio is greater than third preset value, thinks that speed ratio is not in stable state at this time, and is in speed change state, not
It can reflect practical main slave cylinder thrust ratio, so, original main slave cylinder thrust ratio and speed ratio relationship should not be updated at this moment
Figure.In some embodiments of the present embodiment, further includes: if speed ratio averagely becomes in the period at the first moment to the second moment
Rate is greater than the first preset value or the speed changingratio from first moment in the preset time is greater than third preset value,
Original main slave cylinder thrust ratio and speed ratio relational graph are determined as the main slave cylinder thrust ratio of target and speed ratio relational graph.
Step 402: if the difference of the main slave cylinder thrust ratio of the reality and the main slave cylinder thrust ratio of target is in preset range
Interior, update obtains the main slave cylinder thrust ratio of target and speed ratio relational graph, and the main slave cylinder thrust of target is determined by goals ratio.
The corresponding thrust ratio of speed ratio is updated into a step-length for example, updating and can be.
In practical applications, it the difference of main slave cylinder thrust ratio and the main slave cylinder thrust ratio of target may not preset actually
In range, that is to say, that the difference is excessive, it may be possible to hydraulic system fault or driving and driven bevel disk Block failure at this time etc.
Caused by the generation of abnormal condition, it should abandon updating main slave cylinder thrust ratio and speed ratio relational graph.In the present embodiment
In some embodiments, if such as can also include: the main slave cylinder thrust ratio of the reality and the main slave cylinder thrust ratio of target
Original main slave cylinder thrust ratio and speed ratio relational graph within a preset range, are not determined as the main slave cylinder thrust ratio of target by difference
With speed ratio relational graph.
The various embodiments provided through this embodiment, make at the time of speed changingratio is corresponded to less than the second preset value
For the first moment, the speed changingratio from first moment in the preset time is respectively less than third preset value, and described
As the second moment at the time of one moment is after preset time, when speed ratio is average in the period at the first moment to the second moment
Change rate can calculate practical main slave cylinder thrust ratio less than the first preset value, by active cylinder pressure and slave cylinder oil pressure；When
The difference of the main slave cylinder thrust ratio of reality and the main slave cylinder thrust ratio of target within a preset range, can update to obtain target
Main slave cylinder thrust ratio and speed ratio relational graph.It can be seen that the same main slave cylinder thrust ratio and speed ratio relational graph are not used,
But main slave cylinder thrust ratio and speed ratio relational graph are updated according to practical speed ratio situation, principal and subordinate is controlled according to updated relational graph
Dynamic cylinder thrust ratio and then the speed ratio for controlling CVT, cover different gearbox thrust ratio othernesses and same gearbox thrust ratio are poor
The opposite sex improves the accuracy of control speed ratio.
Referring to Fig. 5, another side for updating main slave cylinder thrust ratio and speed ratio relational graph in the embodiment of the present invention is shown
The flow diagram of method.In the present embodiment, the method for example may comprise steps of:
Step 501: obtaining speed changingratio.
Step 502: judging whether speed changingratio is less than p；If so, entering step 503；If it is not, return step 501.
Step 503: being determined as the first moment at the time of the speed changingratio is corresponded to, and obtain the first moment speed ratio.
Step 504: if whether speed changingratio is less than q in the preset time from first moment for judgement, q is greater than
p；If so, entering step 505；If it is not, entering step 512.
Step 505: being determined as second moment at the time of by first moment after the preset time, and obtain
Take the second moment speed ratio.
Step 506: according to the first moment, the second moment, the first moment speed ratio, the second moment speed ratio, obtaining for the first moment
The speed ratio average rate of change in the period at the second moment.
Step 507: judging whether the speed ratio average rate of change is less than m in the period at the first moment to the second moment, and m is less than
p；If so, 508 are entered step, if it is not, entering step 512.
Step 508: by active cylinder and the corresponding sensor of slave cylinder, obtaining active cylinder pressure and slave cylinder oil pressure.
Step 509: the ratio of active cylinder pressure and slave cylinder oil pressure is determined as practical main slave cylinder thrust ratio.
Step 510: judging that actually whether the difference of main slave cylinder thrust ratio and the main slave cylinder thrust ratio of target is in default model
In enclosing, the main slave cylinder thrust of target is determined by goals ratio；If so, 511 are entered step, if it is not, entering step 512.
Step 511: update obtains the main slave cylinder thrust ratio of target and speed ratio relational graph.
Step 512: by original main slave cylinder thrust ratio and speed ratio relational graph be determined as the main slave cylinder thrust ratio of target with
Speed ratio relational graph.
The various embodiments provided through this embodiment, make at the time of speed changingratio is corresponded to less than the second preset value
For the first moment, the speed changingratio from first moment in the preset time is respectively less than third preset value, and described
As the second moment at the time of one moment is after preset time, when speed ratio is average in the period at the first moment to the second moment
Change rate can calculate practical main slave cylinder thrust ratio less than the first preset value, by active cylinder pressure and slave cylinder oil pressure；When
The difference of the main slave cylinder thrust ratio of reality and the main slave cylinder thrust ratio of target within a preset range, can update to obtain target
Main slave cylinder thrust ratio and speed ratio relational graph.It can be seen that the same main slave cylinder thrust ratio and speed ratio relational graph are not used,
But main slave cylinder thrust ratio and speed ratio relational graph are updated according to practical speed ratio situation, principal and subordinate is controlled according to updated relational graph
Dynamic cylinder thrust ratio and then the speed ratio for controlling CVT, cover different gearbox thrust ratio othernesses and same gearbox thrust ratio are poor
The opposite sex improves the accuracy of control speed ratio.
Example devices
Referring to Fig. 6, a kind of device for updating main slave cylinder thrust ratio and speed ratio relational graph in the embodiment of the present invention is shown
Structural schematic diagram.In the present embodiment, described device for example can specifically include:
First determination unit 601, if being less than for the speed ratio average rate of change in the period at the first moment to the second moment
First preset value determines practical main slave cylinder thrust ratio according to active cylinder pressure and slave cylinder oil pressure；First moment is speed
At the time of correspondence than change rate less than the second preset value, second moment be first moment after preset time when
It carves, the speed changingratio from first moment in the preset time is respectively less than third preset value, the third preset value
Greater than second preset value, second preset value is greater than first preset value；
Updating unit 602, if the difference for the main slave cylinder thrust ratio of the reality and the main slave cylinder thrust ratio of target exists
In preset range, update obtains the main slave cylinder thrust ratio of target and speed ratio relational graph, and the main slave cylinder thrust of target is by target
Speed ratio determines.
Optionally, first determination unit 601 for example may include the first acquisition subelement, and described first obtains son list
Member determines that acquisition module, second determine acquisition module and the second acquisition module including the first acquisition module, first；
Described first obtains subelement, speed ratio mean change in the period for obtaining the first moment to the second moment
Rate；
Described first obtains module, for obtaining speed changingratio；
Described first determines acquisition module, if being less than second preset value for the speed changingratio, by the speed
It is determined as first moment at the time of correspondence than change rate, and obtains the first moment speed ratio；
Described second determines acquisition module, if for speed changingratio to be equal in the preset time from first moment
Less than the third preset value, and by first moment after preset time period, by first moment by described pre-
If being determined as second moment at the time of after the time, and obtain the second moment speed ratio；
It is described second obtain module, for according to first moment, second moment, the first moment speed ratio,
The second moment speed ratio obtains the speed ratio average rate of change in the period at first moment to the second moment.
Optionally, first determination unit 601 for example may include that the second acquisition subelement and first determine subelement；
Described second obtains subelement, for obtaining active cylinder pressure by active cylinder and the corresponding sensor of slave cylinder
With slave cylinder oil pressure；
Described first determines subelement, moves for the ratio of active cylinder pressure and slave cylinder oil pressure to be determined as practical principal and subordinate
Cylinder thrust ratio.
Optionally, described device for example can also include:
Second determination unit, if being greater than first for the speed ratio average rate of change in the period at the first moment to the second moment
Preset value or the speed changingratio from first moment in the preset time are greater than third preset value, by original principal and subordinate
Dynamic cylinder thrust ratio is determined as the main slave cylinder thrust ratio of target with speed ratio relational graph and speed ratio relational graph is optional, and described device is for example
Can also include:
Third determination unit, if not for the difference of the main slave cylinder thrust ratio of the reality and the main slave cylinder thrust ratio of target
Within a preset range, original main slave cylinder thrust ratio and speed ratio relational graph are determined as the main slave cylinder thrust ratio of target and speed ratio
Relational graph.
The various embodiments provided through this embodiment, make at the time of speed changingratio is corresponded to less than the second preset value
For the first moment, the speed changingratio from first moment in the preset time is respectively less than third preset value, and described
As the second moment at the time of one moment is after preset time, when speed ratio is average in the period at the first moment to the second moment
Change rate can calculate practical main slave cylinder thrust ratio less than the first preset value, by active cylinder pressure and slave cylinder oil pressure；When
The difference of the main slave cylinder thrust ratio of reality and the main slave cylinder thrust ratio of target within a preset range, can update to obtain target
Main slave cylinder thrust ratio and speed ratio relational graph.It can be seen that the same main slave cylinder thrust ratio and speed ratio relational graph are not used,
But main slave cylinder thrust ratio and speed ratio relational graph are updated according to practical speed ratio situation, principal and subordinate is controlled according to updated relational graph
Dynamic cylinder thrust ratio and then the speed ratio for controlling CVT, cover different gearbox thrust ratio othernesses and same gearbox thrust ratio are poor
The opposite sex improves the accuracy of control speed ratio.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.The terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or equipment for including a series of elements not only includes those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including institute
State in the process, method, article or equipment of element that there is also other identical elements.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form.Though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention.It is any to be familiar with those skilled in the art
Member, without departing from the scope of the technical proposal of the invention, all using the methods and technical content of the disclosure above to the present invention
Technical solution makes many possible changes and modifications or equivalent example modified to equivalent change.Therefore, it is all without departing from
The content of technical solution of the present invention, according to the technical essence of the invention any simple modification made to the above embodiment, equivalent
Variation and modification, all of which are still within the scope of protection of the technical scheme of the invention.
Claims (10)
1. a kind of method for updating main slave cylinder thrust ratio and speed ratio relational graph characterized by comprising
If the speed ratio average rate of change is less than the first preset value in the period at the first moment to the second moment, according to active cylinder pressure
With slave cylinder oil pressure, practical main slave cylinder thrust ratio is determined；First moment is speed changingratio less than the second preset value pair
At the time of answering, second moment be first moment after preset time at the time of, it is described from first moment
Speed changingratio in preset time is respectively less than third preset value, and the third preset value is greater than second preset value, described
Second preset value is greater than first preset value；
If the difference of the main slave cylinder thrust ratio of reality and the main slave cylinder thrust ratio of target is within a preset range, update obtains mesh
Main slave cylinder thrust ratio and speed ratio relational graph are marked, the main slave cylinder thrust of target is determined by goals ratio.
2. the method according to claim 1, wherein speed ratio in first moment to the period at the second moment
The method that the average rate of change obtains, comprising:
Obtain speed changingratio；
If the speed changingratio is less than second preset value, it is determined as described the at the time of the speed changingratio is corresponded to
One moment, and obtain the first moment speed ratio；
If speed changingratio is respectively less than the third preset value in the preset time from first moment, and by described
One moment after preset time period, when being determined as described second at the time of by first moment after the preset time
It carves, and obtains the second moment speed ratio；
According to first moment, second moment, the first moment speed ratio, the second moment speed ratio, described in acquisition
The speed ratio average rate of change in the period at the first moment to the second moment.
3. the method according to claim 1, wherein described according to active cylinder pressure and slave cylinder oil pressure, determination
Practical main slave cylinder thrust ratio, comprising:
By active cylinder and the corresponding sensor of slave cylinder, active cylinder pressure and slave cylinder oil pressure are obtained；
The ratio of active cylinder pressure and slave cylinder oil pressure is determined as practical main slave cylinder thrust ratio.
4. the method according to claim 1, wherein further include:
If the speed ratio average rate of change is greater than the first preset value or when from described first in the period at the first moment to the second moment
The speed changingratio carved in the preset time is greater than third preset value, by original main slave cylinder thrust ratio and speed ratio relationship
Figure is determined as the main slave cylinder thrust ratio of target and speed ratio relational graph.
5. the method according to claim 1, wherein further include:
If the difference of the main slave cylinder thrust ratio of reality and the main slave cylinder thrust ratio of target is not within a preset range, will be original
Main slave cylinder thrust ratio and speed ratio relational graph are determined as the main slave cylinder thrust ratio of target and speed ratio relational graph.
6. a kind of device for updating main slave cylinder thrust ratio and speed ratio relational graph characterized by comprising
First determination unit, if default less than first for the speed ratio average rate of change in the period at the first moment to the second moment
Value determines practical main slave cylinder thrust ratio according to active cylinder pressure and slave cylinder oil pressure；First moment is speed changingratio
At the time of correspondence less than the second preset value, second moment be first moment after preset time at the time of, from institute
It states the speed changingratio from the first moment in the preset time and is respectively less than third preset value, the third preset value is greater than described
Second preset value, second preset value are greater than first preset value；
Updating unit, if for the difference of the main slave cylinder thrust ratio of the reality and the main slave cylinder thrust ratio of target in preset range
Interior, update obtains the main slave cylinder thrust ratio of target and speed ratio relational graph, and the main slave cylinder thrust of target is determined by goals ratio.
7. device according to claim 6, which is characterized in that first determination unit includes the first acquisition subelement,
The first acquisition subelement determines that acquisition module, second determine that acquisition module and second obtains including the first acquisition module, first
Obtain module；
Described first obtains subelement, the speed ratio average rate of change in the period for obtaining the first moment to the second moment；
Described first obtains module, for obtaining speed changingratio；
Described first determines that acquisition module becomes the speed ratio if being less than second preset value for the speed changingratio
It is determined as first moment at the time of rate corresponds to, and obtains the first moment speed ratio；
Described second determines acquisition module, if for speed changingratio to be respectively less than in the preset time from first moment
The third preset value, and by first moment after preset time period, when first moment is passed through described default
Between after at the time of be determined as second moment, and obtain the second moment speed ratio；
Described second obtains module, for according to first moment, second moment, the first moment speed ratio, described
Second moment speed ratio obtains the speed ratio average rate of change in the period at first moment to the second moment.
8. device according to claim 6, which is characterized in that first determination unit include second obtain subelement and
First determines subelement；
Described second obtains subelement, for by active cylinder and the corresponding sensor of slave cylinder, obtain active cylinder pressure and from
Dynamic cylinder oil pressure；
Described first determines subelement, pushes away for the ratio of active cylinder pressure and slave cylinder oil pressure to be determined as practical main slave cylinder
Power ratio.
9. device according to claim 6, which is characterized in that further include:
Second determination unit, if it is default to be greater than first for the speed ratio average rate of change in the period at the first moment to the second moment
Value or the speed changingratio from first moment in the preset time are greater than third preset value, by original main slave cylinder
Thrust ratio and speed ratio relational graph are determined as the main slave cylinder thrust ratio of target and speed ratio relational graph.
10. device according to claim 6, which is characterized in that further include:
Third determination unit, if the difference for the main slave cylinder thrust ratio of the reality and the main slave cylinder thrust ratio of target is not pre-
If in range, original main slave cylinder thrust ratio and speed ratio relational graph are determined as the main slave cylinder thrust ratio of target and speed ratio relationship
Figure.
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| CN201810180413.0A CN110230692B (en) | 2018-03-05 | 2018-03-05 | Method and device for updating relation graph of thrust ratio and speed ratio of driving cylinder and driven cylinder |
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