CN109253247B - Main oil way pressure self-adaptive control method and system and electronic equipment - Google Patents
Main oil way pressure self-adaptive control method and system and electronic equipment Download PDFInfo
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- CN109253247B CN109253247B CN201811306218.4A CN201811306218A CN109253247B CN 109253247 B CN109253247 B CN 109253247B CN 201811306218 A CN201811306218 A CN 201811306218A CN 109253247 B CN109253247 B CN 109253247B
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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
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/4008—Control of circuit pressure
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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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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
The invention provides a main oil way pressure self-adaptive control method, a system and electronic equipment, which relate to the technical field of automatic gearbox control and comprise the following steps: monitoring a speed sensor of the transmission by adopting an adaptive control algorithm to obtain clutch slip and adaptive learning step length; calculating an increase pressure based on the clutch slip; calculating self-adaptive control pressure according to the step length; obtaining a basic set pressure according to the critical safety pressure and a preset safety pressure based on the error; and obtaining the pressure of the main oil way according to the increased pressure, the self-adaptive control pressure and the basic set pressure. The invention adaptively controls the pressure of the main oil way according to the change condition of the slip difference of the clutch calculated by the speed sensor of the speed changer, reduces the safety coefficient of the pressure control parameter of the main oil way, and reduces the safety margin, thereby improving the transmission efficiency of the speed changer, and the speed changer can safely run without slipping.
Description
Technical Field
The invention relates to the technical field of automatic transmission control, in particular to a main oil way pressure self-adaptive control method, a main oil way pressure self-adaptive control system and electronic equipment.
Background
In a hydraulic system of a hydraulic automatic transmission, system oil pressure, namely main oil pressure of the transmission, is provided by a mechanical oil pump, and the main oil pressure provides compaction pressure for each clutch system. The mechanical oil pump is connected with the engine, the higher the engine speed is, the higher the supplied flow rate is, and the higher the pressure of the main oil circuit is, but the pressure cannot be increased along with the increase of the speed due to the adjustment of the flow regulating valve. The critical value of the main oil circuit pressure control is the pressure which ensures that each lockup clutch is just compressed, the increase of the main oil circuit pressure can lead to the increase of the load of the transmission so as to reduce the transmission efficiency, and the decrease of the main oil circuit pressure can increase the slipping risk of the gear shifting clutch. Controlling the main line pressure generally increases the safety factor based on the clutch pressure threshold. The safety factor is mainly used for covering the difference of mechanical and hydraulic systems from the transmission and the difference of torque from an engine of the whole vehicle, and because the mass-production transmission is not provided with a pressure sensor in view of cost, the main oil pressure control is carried out under the condition that the real main oil pressure is unknown, and a larger safety factor is required to be ensured.
Disclosure of Invention
In view of the above, the present invention provides a method, a system, and an electronic device for adaptively controlling a main oil line pressure, wherein the main oil line pressure is adaptively controlled according to a clutch slip change condition calculated by a speed sensor of a transmission, so as to reduce a safety factor of a main oil line pressure control parameter and reduce a safety margin, thereby improving transmission efficiency of the transmission, and the transmission can safely operate without sliding friction.
In a first aspect, an embodiment of the present invention provides a main oil line pressure adaptive control method, where the method includes:
monitoring a speed sensor of the transmission by adopting an adaptive control algorithm to obtain clutch slip and adaptive learning step length;
calculating an increase pressure based on the clutch slip;
calculating self-adaptive control pressure according to the step length;
obtaining a basic set pressure according to the critical safety pressure and a preset safety pressure based on the error;
and obtaining the pressure of the main oil way according to the increased pressure, the self-adaptive control pressure and the basic set pressure.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, wherein the step of monitoring a speed sensor of the transmission by using an adaptive control algorithm to obtain a clutch slip and a step size of adaptive learning includes:
when the time of the gear shifting end of the transmission reaches the set end time, starting monitoring on the clutch to obtain the slip of the clutch;
when the clutch slip is larger than a set threshold value and lasts for a first preset time, activating a flag bit of self-adaptive learning;
and calculating the clutch slip overrun average value in the first preset time, and calculating the step length according to the clutch slip overrun average value.
With reference to the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, wherein the step of monitoring a speed sensor of the transmission by using an adaptive control algorithm to obtain a clutch slip and a step size of adaptive learning includes:
when the time of the gear shifting end of the transmission reaches the set end time, starting monitoring on the clutch to obtain the clutch slip and the fluctuation times of the clutch slip;
when the fluctuation times are greater than the set times, activating a flag bit of the self-adaptive learning;
calculating a step length according to the clutch slip with the maximum amplitude in the slip fluctuation process;
when the clutch slip is smaller than the set threshold value, the fluctuation frequency of the clutch slip is counted as one time.
With reference to the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, wherein the step of monitoring a speed sensor of the transmission by using an adaptive control algorithm to obtain a clutch slip and a step size of adaptive learning includes:
when the gear shifting end time of the transmission reaches the set end time, starting monitoring on a mark position of a quick accelerator to obtain the opening degree of the accelerator and the change rate of the opening degree of the accelerator;
monitoring the slip of the clutch within a second preset time when the accelerator opening is larger than the opening limit value and the accelerator opening change rate is larger than the opening change rate limit value;
in a second preset time, when the slip of the clutch is larger than a threshold value of a set slip, activating a flag bit of self-adaptive learning;
and calculating the step length of the self-adaptive learning according to the clutch slip with the maximum amplitude.
With reference to the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, wherein the step of calculating the boost pressure according to the clutch slip includes:
the increase pressure is calculated according to the following formula:
PI(n)＝kI(nslip(n)-nslip_thr(n))+PI(n-1)，
wherein, PI(n) is the increasing pressure of the current gear, kIIs an adjustment factor; n isslip(n) is clutch slip, nslip_thr(n) threshold value of slip, PIAnd (n-1) is the increasing pressure of the previous gear.
With reference to the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the step of calculating an adaptive control pressure according to a step size includes:
and accumulating the step length of the current gear and the step length of the previous gear to obtain the self-adaptive control pressure.
With reference to the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, wherein the step of obtaining the basic set pressure according to the critical safety pressure and the preset safety pressure based on the error includes:
the base set pressure is calculated according to the following formula:
wherein the content of the first and second substances,
the pressure is set for the basis of the pressure,
at the critical safety pressure, the pressure is,
is a preset safety pressure based on the error.
With reference to the first aspect, an embodiment of the present invention provides a seventh possible implementation manner of the first aspect, where the step of obtaining the pressure of the main oil path according to the boost pressure, the adaptive control pressure, and the basic set pressure includes:
wherein, PLPAs the pressure of the main oil passage,
setting the pressure, P, on the basisI(n) increasing pressure of current gear, PAdptAnd (n) is adaptive control pressure.
In a second aspect, an embodiment of the present invention further provides a main oil line pressure adaptive control system, where the system includes:
the monitoring unit is used for monitoring a speed sensor of the transmission by adopting an adaptive control algorithm to obtain clutch slip and adaptive learning step length;
a first pressure calculation unit for calculating an increase pressure based on the clutch slip;
the second pressure calculation unit is used for calculating self-adaptive control pressure according to the step length;
a third pressure calculation unit for obtaining a basic set pressure according to the critical safety pressure and a preset safety pressure based on the error;
and the fourth pressure calculation unit is used for obtaining the pressure of the main oil way according to the increased pressure, the self-adaptive control pressure and the basic set pressure.
In a third aspect, an embodiment of the present invention further provides an electronic device, including a memory and a processor, where the memory stores a computer program that is executable on the processor, and when the processor executes the computer program, the method for adaptively controlling a main oil line pressure according to any one of the foregoing embodiments is implemented.
The embodiment of the invention has the following beneficial effects:
the invention provides a main oil way pressure self-adaptive control method, a system and electronic equipment, wherein the method comprises the following steps: monitoring a speed sensor of the transmission by adopting an adaptive control algorithm to obtain clutch slip and adaptive learning step length; calculating an increase pressure based on the clutch slip; calculating self-adaptive control pressure according to the step length; obtaining a basic set pressure according to the critical safety pressure and a preset safety pressure based on the error; and obtaining the pressure of the main oil way according to the increased pressure, the self-adaptive control pressure and the basic set pressure. The invention adaptively controls the pressure of the main oil way according to the change condition of the slip difference of the clutch calculated by the speed sensor of the speed changer, reduces the safety coefficient of the pressure control parameter of the main oil way, and reduces the safety margin, thereby improving the transmission efficiency of the speed changer, and the speed changer can safely run without slipping.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a main oil line pressure adaptive control method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of adaptive control based on clutch slip duration monitoring according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of adaptive control based on the monitoring of the pulse slip of the quick-service filler door according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of adaptive control based on the monitoring of the pulse slip of the quick-service filler door according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a main oil line pressure adaptive control system according to a second embodiment of the present invention.
Icon:
100-a monitoring unit; 200-a first pressure calculation unit; 300-a second pressure calculation unit; 400-a third pressure calculation unit; 500-fourth pressure calculation unit.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The main circuit pressure provides the hold down pressure for each clutch system. The critical value of the main oil circuit pressure control is the pressure which ensures that each lockup clutch is just compressed, the increase of the main oil circuit pressure can lead to the increase of the load of the transmission so as to reduce the transmission efficiency, and the decrease of the main oil circuit pressure can increase the slipping risk of the gear shifting clutch. Controlling the main line pressure generally increases the safety factor based on the clutch pressure threshold. The safety factor is mainly used for covering the difference of mechanical and hydraulic systems from the transmission and the difference of torque from an engine of the whole vehicle, and because the mass-production transmission is not provided with a pressure sensor in view of cost, the main oil pressure control is carried out under the condition that the real main oil pressure is unknown, and a larger safety factor is required to be ensured.
Based on the method, the system and the electronic equipment for adaptively controlling the pressure of the main oil way, which are provided by the embodiment of the invention, the pressure of the main oil way is adaptively controlled according to the change condition of the clutch slip calculated by a speed sensor of the transmission, so that the safety coefficient of the pressure control parameter of the main oil way is reduced, the safety margin is reduced, the transmission efficiency of the transmission is improved, and the transmission can safely run without sliding friction.
For the convenience of understanding the present embodiment, first, a main oil passage pressure adaptive control method disclosed in the present embodiment will be described in detail.
The first embodiment is as follows:
fig. 1 is a flowchart of a main oil line pressure adaptive control method according to an embodiment of the present invention.
Referring to fig. 1, the main oil path pressure adaptive control method includes:
step S110, monitoring a speed sensor of the transmission by adopting an adaptive control algorithm to obtain clutch slip and adaptive learning step length;
step S120, calculating an increased pressure according to the clutch slip;
step S130, calculating self-adaptive control pressure according to the step length;
step S140, obtaining a basic set pressure according to the critical safety pressure and a preset safety pressure based on the error;
and step S150, obtaining the pressure of the main oil way according to the increased pressure, the self-adaptive control pressure and the basic set pressure.
Specifically, the main oil line pressure PLPFor main line pressure P, as shown in equation (1)LPCan be controlled by increasing the pressure PI(n) adaptive control of pressure PAdpt(n) and base set pressure
The three parts are as follows:
wherein the basic set pressure
Based on the speed n of the input shaft of the transmission at different gearsinAnd input shaft torque TinThe obtained base set pressure was tested under experimental conditions. Further, the basic set pressure
The critical safety pressure under each gear, torque and rotating speed is obtained by testing the experimental conditions
On the basis of (not considering the safety factor), the safety pressure set under different gears, torques and rotating speeds by considering the system error
As shown in equation (2):
increasing the pressure PI(n) is a threshold value n for the slip that is exceeded if the clutch produces a slip in a fixed gearslip_thr(n), then the main line pressure can be rapidly increased by the Integral control in the PI (Proportional Integral) control as shown in the formula (3), and the scuff can be reduced and eliminated.
PI(n)＝kI(nslip(n)-nslip_thr(n))+PI(n-1) (3)，
Wherein, PI(n) is the increasing pressure of the current gear, kIIs an adjustment factor; n isslip(n) is clutch slip, nslip_thr(n) threshold value of slip, PIAnd (n-1) is the increasing pressure of the previous gear.
Although PI control can eliminate slip, it can only function after each occurrence of slip. Therefore, it is necessary to increase the adaptive control pressure PAdpt(n), it can be ensured that slip is not occurring after adaptation. Adaptive control of pressure PAdpt(n) is obtained by dividing the step length f of the current gearstep(n) step length f of previous gearstep(n-1) is accumulated as shown in equation (4):
PAdpt(n)＝fstep(n)+fstep(n-1) (4)。
next, the main oil passage pressure adaptive control method will be described for different expressions of clutch slip.
In step S110, a speed sensor of the transmission is monitored by using an adaptive control algorithm to obtain a clutch slip and a step length of adaptive learning, and the method specifically includes:
during a transmission shift, clutch slip is a dynamically changing process, and after the shift is completed, clutch slip target is 0. If the clutch generates slip at this time, the main oil path pressure is small. FIG. 2 is an adaptive control logic for clutch slip duration monitoring based on the time to shift the transmission to the end of the set end time Tslip_ChcAs the timing to start monitoring, when the set end time T is reachedslip_ChcAnd then, starting and monitoring the clutch to obtain the slip of the clutch. Because the slip of the clutch fluctuates slightly around 0rpm even if slip does not occur due to the accuracy of the speed sensor, which is a normal phenomenon, it is necessary to set the threshold value n of the slipslip_thr。
When the slip of the clutch is larger than a set threshold value nslip_thrAnd the obtained time exceeds the first preset time T continuouslyslip_HoldAnd activating the flag bit of the adaptive learning.
After the adaptive activation, a first preset time T is calculatedslip_HoldInternal clutch slip overrun average nslip_aveAnd according to the clutch slip overrun average nslip_aveCalculating the step length fstep(nslip_ave)。
Thus, the larger the clutch slip, the larger the step size of the adaptive learning. The step size of the adaptive learning will be assigned the corresponding position according to the gear and the torque of the input shaft and stored.
In step S110, a speed sensor of the transmission is monitored by using an adaptive control algorithm to obtain a clutch slip and a step length of adaptive learning, and the method specifically includes:
when the main oil line pressure is low, in particular at critical values, the clutch does not necessarily produce a continuous slip but a fluctuating slip at the filler door, so that the adaptation method described above is ineffective. It is desirable to employ an adaptive approach based on clutch slip fluctuation times and frequency monitoring as shown in fig. 3.
When the time of the transmission gear shift end reaches the set end time Tslip_ChcThen, starting and monitoring the clutch to obtain the slip of the clutch and the fluctuation times of the slip of the clutch; wherein when the clutch slip is larger than a set threshold value nslip_thrTo less than a threshold value nslip_thrThe number of fluctuations in the clutch slip is counted as one.
If the clutch slip is less than the threshold value nslip_thrIs less than the set duration Tslip_IdleAnd resetting the fluctuation times of the clutch slip.
When the fluctuation times is more than the set times NJudderAnd activating the flag bit of the adaptive learning. After the self-adaption activation, the clutch slip n with the maximum amplitude in the slip fluctuation process is recordedslip_maxAnd with reference to Table 1, based on the maximum magnitude of clutch slip nslip_maxCalculating the step length fstep1(nslip_max). Thus, the larger the clutch slip, the larger the step size of the adaptive learning. The step size of the adaptive learning will be assigned the corresponding position according to the gear and the torque of the input shaft and stored.
TABLE 1 comparison table of clutch slip and step length
| nslip_max(rpm) | 10 | 20 | 40 | 60 | 80 | 100 |
| fstep1(nslip_max)(bar) | 0 | 0 | 0 | 0.2 | 0.3 | 0.4 |
In step S110, a speed sensor of the transmission is monitored by using an adaptive control algorithm to obtain a clutch slip and a step length of adaptive learning, and the method specifically includes:
during rapid refuelling, the engine torque increases rapidly, which can cause shock if the main circuit pressure is too low causing the clutch slip to be momentarily washed away. The adaptive strategy of fig. 3, according to fig. 2, is not effective for this condition. It is desirable to employ the adaptive approach based on rapid tip-in door pulse slip monitoring shown in fig. 4.
And when the gear shifting end time of the transmission reaches the set end time, starting monitoring the mark position of the quick accelerator to obtain the accelerator opening and the accelerator opening change rate.
When the accelerator opening degree is larger than the opening degree limit value alphapedal_ThrAnd the throttle opening degree change rate is larger than the opening degree change rate limit value
For a second preset time TFstPedalWithin, clutch slip is monitored.
Within a second preset time TFstPedalWhen the clutch slip is greater thanSetting a threshold value n for slipslip_thr2And activating the flag bit of the adaptive learning.
After the adaptive activation, the clutch slip n with the maximum amplitude in the process is recordedslip_max2And according to the maximum magnitude of clutch slip nslip_max2Calculating step length f of adaptive learningstep2(nslip_max2). Thus, the larger the clutch slip, the larger the step size of the adaptive learning. The step size of the adaptive learning will be assigned the corresponding position according to the gear and the torque of the input shaft and stored.
Different performances of clutch slip and corresponding step length are determined by analyzing the self-adaptive control algorithm under different running conditions, and then the clutch slip and the step length are combined with the formulas (1), (2), (3) and (4) to carry out self-adaptive control on the pressure of the main oil way.
The self-adaptive control is adopted, so that the safety margin of pressure control of the main oil way can be reduced, the loss of the transmission can be reduced on the basis of ensuring the service life of the clutch friction plate, and the transmission efficiency is improved. Particularly, different adaptive identification methods are respectively formulated by the various adaptive methods provided by the embodiment of the invention aiming at three expressions of the clutch slip, so that all driving conditions can be covered. The self-adaptive process has the characteristics of stability, accuracy and rapidness.
Example two:
fig. 5 is a schematic diagram of a main oil line pressure adaptive control system according to a second embodiment of the present invention.
The embodiment of the invention provides a main oil way pressure self-adaptive control system, which is used for realizing the main oil way pressure self-adaptive control method of the embodiment. Referring to fig. 5, the system includes the following units:
the monitoring unit 100 is used for monitoring a speed sensor of the transmission by adopting an adaptive control algorithm to obtain clutch slip and adaptive learning step length;
a first pressure calculation unit 200 for calculating an increase pressure based on the clutch slip;
a second pressure calculation unit 300 for calculating adaptive control pressure according to the step length;
a third pressure calculation unit 400 for obtaining a basic set pressure according to the critical safety pressure and the error-based preset safety pressure;
and a fourth pressure calculation unit 500 for obtaining the main oil line pressure from the boost pressure, the adaptive control pressure, and the basic set pressure.
The embodiment of the invention also provides electronic equipment, which comprises a memory and a processor, wherein a computer program capable of running on the processor is stored in the memory, and when the processor executes the computer program, the main oil way pressure self-adaptive control method in the embodiment is realized.
The system and the electronic device provided by the embodiment of the present invention have the same implementation principle and technical effect as the foregoing method embodiments, and for the sake of brief description, no mention is made in the system and the electronic device embodiments, and reference may be made to the corresponding contents in the foregoing method embodiments.
The embodiment of the invention has the following beneficial effects:
the invention provides a main oil way pressure self-adaptive control method, a system and electronic equipment, wherein the method comprises the following steps: monitoring a speed sensor of the transmission by adopting an adaptive control algorithm to obtain clutch slip and adaptive learning step length; calculating an increase pressure based on the clutch slip; calculating self-adaptive control pressure according to the step length; obtaining a basic set pressure according to the critical safety pressure and a preset safety pressure based on the error; and obtaining the pressure of the main oil way according to the increased pressure, the self-adaptive control pressure and the basic set pressure. The invention adaptively controls the pressure of the main oil way according to the change condition of the slip difference of the clutch calculated by the speed sensor of the speed changer, reduces the safety coefficient of the pressure control parameter of the main oil way, and reduces the safety margin, thereby improving the transmission efficiency of the speed changer, and the speed changer can safely run without slipping.
In the description of the present invention, it should be noted that the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A main oil way pressure self-adaptive control method is characterized by comprising the following steps:
monitoring a speed sensor of the transmission by adopting an adaptive control algorithm to obtain clutch slip and adaptive learning step length;
calculating an increase pressure based on the clutch slip;
calculating self-adaptive control pressure according to the step length; the self-adaptive control pressure is obtained by accumulating the step length of the current gear and the step length of the previous gear;
obtaining a basic set pressure according to the critical safety pressure and a preset safety pressure based on the error;
obtaining main oil circuit pressure according to the increased pressure, the self-adaptive control pressure and the basic set pressure;
the step of monitoring a speed sensor of the transmission by adopting an adaptive control algorithm to obtain the clutch slip and the step length of adaptive learning comprises the following steps:
when the time of the gear shifting end of the transmission reaches the set end time, starting monitoring on a clutch to obtain the slip of the clutch;
when the clutch slip is larger than a set threshold value and lasts for a first preset time, activating a self-adaptive learning zone bit;
and calculating the clutch slip overrun average value in the first preset time, and calculating the step length according to the clutch slip overrun average value.
2. The method of claim 1, wherein the step of monitoring a transmission speed sensor using an adaptive control algorithm to obtain clutch slip and an adaptive learning step size comprises:
when the time of the gear shifting end of the transmission reaches the set end time, starting monitoring on a clutch to obtain the clutch slip and the fluctuation times of the clutch slip;
when the fluctuation times are greater than the set times, activating a flag bit of the self-adaptive learning;
calculating the step length according to the clutch slip with the maximum amplitude in the slip fluctuation process;
when the clutch slip is smaller than the threshold value from larger than the set threshold value, the fluctuation frequency of the clutch slip is counted as one time.
3. The method of claim 1, wherein the step of monitoring a transmission speed sensor using an adaptive control algorithm to obtain clutch slip and an adaptive learning step size comprises:
when the gear shifting end time of the transmission reaches the set end time, starting monitoring on a mark position of a quick accelerator to obtain the opening degree of the accelerator and the change rate of the opening degree of the accelerator;
monitoring the clutch slip within a second preset time when the accelerator opening is larger than the opening limit value and the accelerator opening change rate is larger than the opening change rate limit value;
in the second preset time, when the clutch slip is larger than a threshold value of a set slip, activating a flag bit of self-adaptive learning;
and calculating the step length of the self-adaptive learning according to the clutch slip with the maximum amplitude.
4. The method of claim 1, wherein said step of calculating an increase pressure based on said clutch slip comprises:
calculating the increase pressure according to:
PI(n)＝kI(nslip(n)-nslip_thr(n))+PI(n-1)，
wherein, PI(n) is the increasing pressure of the current gear, kIIs an adjustment factor; n isslip(n) is clutch slip, nslip_thr(n) threshold value of slip, PIAnd (n-1) is the increasing pressure of the previous gear.
5. The method of claim 1, wherein the step of deriving the base set pressure from the threshold safety pressure and the error-based preset safety pressure comprises:
calculating the base set pressure according to:
wherein the content of the first and second substances,
a pressure is set for the basis,
in order to be at the critical safety pressure,
and presetting a safety pressure based on the error.
6. The method of claim 1, wherein the step of deriving a main line pressure from the boost pressure, the adaptive control pressure, and the base set pressure comprises:
wherein, PLPFor the purpose of the main oil line pressure,
setting a pressure, P, for said basisI(n) increasing pressure of current gear, PAdptAnd (n) is the adaptive control pressure.
7. A main line pressure adaptive control system, comprising:
the monitoring unit is used for monitoring a speed sensor of the transmission by adopting an adaptive control algorithm to obtain clutch slip and adaptive learning step length;
a first pressure calculation unit for calculating an increase pressure based on the clutch slip;
the second pressure calculation unit is used for calculating self-adaptive control pressure according to the step length; the self-adaptive control pressure is obtained by accumulating the step length of the current gear and the step length of the previous gear;
a third pressure calculation unit for obtaining a basic set pressure according to the critical safety pressure and a preset safety pressure based on the error;
the fourth pressure calculation unit is used for obtaining the pressure of the main oil way according to the increased pressure, the self-adaptive control pressure and the basic set pressure;
the method for monitoring the speed sensor of the transmission by adopting the self-adaptive control algorithm to obtain the clutch slip and the self-adaptive learning step length comprises the following steps:
when the time of the gear shifting end of the transmission reaches the set end time, starting monitoring on a clutch to obtain the slip of the clutch;
when the clutch slip is larger than a set threshold value and lasts for a first preset time, activating a self-adaptive learning zone bit;
and calculating the clutch slip overrun average value in the first preset time, and calculating the step length according to the clutch slip overrun average value.
8. An electronic device comprising a memory and a processor, wherein the memory stores a computer program operable on the processor, and the processor implements the adaptive main line pressure control method according to any one of claims 1 to 6 when executing the computer program.
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| JP3969330B2 (en) * | 2003-03-28 | 2007-09-05 | トヨタ自動車株式会社 | Control device for direct coupling clutch for vehicle |
| CN103115145A (en) * | 2013-02-01 | 2013-05-22 | 重庆青山工业有限责任公司 | Main oil pressure control method of dual clutch transmission |
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