CN114704627B - Self-adaptive control method for automatic transmission - Google Patents
Self-adaptive control method for automatic transmission Download PDFInfo
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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
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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
- F16H61/04—Smoothing ratio shift
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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
- F16H2061/0087—Adaptive control, e.g. the control parameters adapted by learning
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
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Abstract
An adaptive control method for an automatic transmission belongs to the technical field of automatic transmissions. Based on the existing self-adaptive control technology, comprehensive overall consideration is carried out, a set of perfect self-learning implementation and compensation management mechanism is established, the driving comfort of the vehicle is further improved, and the durability of the product is ensured. The method comprises the following steps: s1, inputting a current driving condition signal into a self-adaptive coordinator; s2, the self-adaptive coordinator finds out the worst element and selects the current best adaptive method from the self-adaptive method library; s3, the self-adaptive method triggered by the self-adaptive coordinator transmits a control instruction to the gear shifting element control module, and then the self-adaptive method transmits acquired data to the self-adaptive evaluator; s4, summarizing oil charge time, torque transmission points and torque pressure curves obtained by the worst element in the self-adaptive evaluator S2 by a corresponding self-adaptive method, and compensating the obtained compensation value to preset control data of the element in the gear shifting element control module after processing.
Description
Technical Field
The invention belongs to the technical field of automatic transmissions, and particularly relates to an adaptive control method of an automatic transmission.
Background
Automatic transmission vehicles have become the mainstream of the market today, and both manufacturing dispersion and aging of the automatic transmission have adverse effects on the shift control process that need to be compensated by adaptation.
However, the conventional automatic transmission still has a problem of unsatisfactory effects.
Disclosure of Invention
The invention aims to solve the problems in the background art, and further provides an automatic transmission self-adaptive control method, which is based on the existing self-adaptive control technology, performs comprehensive overall consideration, establishes a set of perfect self-learning implementation and compensation management mechanism, further improves the driving comfort of the vehicle and ensures the durability of products.
The technical scheme adopted by the invention is as follows:
an adaptive control method of an automatic transmission, comprising the steps of:
s1, inputting a current driving condition signal into a self-adaptive coordinator;
s2, the self-adaptive coordinator finds out the worst element (clutch/brake) and selects the self-adaptive method which is most suitable at present from the self-adaptive method library;
s3, the self-adaptive method triggered by the self-adaptive coordinator transmits a control instruction to the gear shifting element control module, then the self-adaptive method transmits acquired data to the self-adaptive evaluator,
s4, summarizing oil charge time, torque transmission points and torque pressure curves obtained by the worst element in the self-adaptive evaluator S2 by a corresponding self-adaptive method, and compensating the obtained compensation value to preset control data of the element in the gear shifting element control module after processing.
Compared with the prior art, the invention has the following beneficial effects:
the invention can further improve the driving comfort of the vehicle and ensure the durability of the product on the basis of the self-adaptive control technology.
Drawings
FIG. 1 is a diagram of the overall control framework of the present invention;
FIG. 2 is a block diagram of the input-output relationship of the adaptive coordinator of the present invention;
FIG. 3 is a schematic diagram of a method for processing compensation values of torque pressure curves in the adaptive estimator according to the present invention.
Detailed Description
For a better understanding of the objects, structures and functions of the present invention, reference should be made to the following detailed description of the invention with reference to the accompanying drawings.
Referring to fig. 1 to 3, an adaptive control method of an automatic transmission according to the present invention includes the steps of:
s1, inputting a current driving condition signal into a self-adaptive coordinator;
s2, the self-adaptive coordinator finds out the worst element and selects the current best adaptive method from the self-adaptive method library; wherein: the elements include clutches and brakes.
S3, the self-adaptive method triggered by the self-adaptive coordinator transmits a control instruction to the gear shifting element control module, and then the self-adaptive method transmits acquired data to the self-adaptive evaluator;
s4, summarizing oil charge time, torque transmission points and torque pressure curves obtained by the worst element in the self-adaptive evaluator S2 by a corresponding self-adaptive method, and compensating the obtained compensation value to preset control data of the element in the gear shifting element control module after processing.
Wherein: 1. the self-adaptive coordinator is essentially a state machine, and decides how to perform self-adaptive control according to the signal input of the current driving working condition;
as shown in fig. 2, the input information of the adaptive coordinator includes a vehicle state, an engine torque/rotation speed, a clutch/hydraulic element state, a shift pre-determination, and road information.
Role of the adaptive coordinator:
1. finding the worst actuator (clutch/brake) according to the deviation condition of the previous gear shift control and the target, and preferentially starting the adaptive control of the actuator when the condition is satisfied; after each shift control is stable, every certain driving cycle, under the condition that the condition is met, the adaptive control is implemented on each executive component to acquire the latest control data in the current state.
2. The currently most suitable adaptation method is selected from a library of adaptation methods.
3. If the adaptive control condition is no longer satisfied, the vehicle condition is approaching a shift line, a shift is imminent, or an unexpected event occurs, the current adaptive control is terminated.
The output of the adaptive coordinator triggers for the adaptive method.
Judgment logic of the adaptive coordinator:
for example: and (3) performing steady-state gear learning on all gear shifting elements in the first driving cycle in the whole vehicle state. And then, according to the set driving cycle/mileage, performing steady-state gear learning on all gear shifting elements. When various conditions are satisfied, the control pressure command is compensated for during shifting based on the deviation between the actual shift control result and the set target parameter.
2. The self-adaptive method library comprises self-adaptive control modes suitable for various working conditions, and mainly comprises three types of gear shifting, in-situ static and steady-state gear driving, wherein:
adaptive method in gear shifting conditions, comprising
1. The inertia phase self-adaption method comprises the following steps: the method is used for compensating a torque pressure curve of a combining element, and comprises the steps of comparing an original setting with an actual control value according to an input torque and an average control pressure command in an inertia phase in a power upshift process, and adjusting the preset torque pressure curve of the combining element;
the method comprises the following steps: when the actual pressure command corresponding to the current input torque in the actual control is smaller than the pressure command set under the current input torque, the pressure value of the corresponding torque part in the set torque-pressure curve is downwards adjusted; and when the actual pressure command corresponding to the current input torque in the actual control is larger than the pressure command set under the current input torque, the pressure value of the corresponding torque part in the set torque-pressure curve is adjusted upwards.
2. Element bonding adaptation method: the method is used for compensating the torque transmission point of the combination element, and comprises the steps of identifying the torque transmission point of the clutch of the combination element according to the change of the turbine rotating speed in the gear shifting in a static in-situ mode, comparing the originally set time from the end of the oil filling stage which is actually generated to the time when the turbine rotating speed is changed, increasing the torque transmission point set pressure when the actual time is longer than the target time, and reducing the torque transmission point set pressure when the actual time is shorter than the target time.
3. The self-adaptive method for gear shifting and oil filling comprises the following steps: the method is used for compensating the oil filling time of the coupling element, and comprises the steps of compensating the oil filling time of the coupling element according to the reduction of the rotation speed of the turbine in the oil filling stage when the gear shifting starts;
the method comprises the following steps: and (3) for any upshift process and unpowered downshift, when the turbine rotation speed is detected to fall down in a certain time in or after the oil filling stage, reducing the oil filling time of a preset combining element.
4. The torque phase time self-adaption method comprises the following steps: the method is used for compensating the torque pressure curve of the coupling element, and comprises the steps of adjusting the preset torque pressure curve of the coupling element according to the torque phase completion time for the gear shifting of the torque-rotating speed sequence;
the method comprises the following steps: when the torque phase completion time is greater than the preset target time, the pressure value of the corresponding torque part in the set torque-pressure curve is adjusted upwards; and when the torque phase completion time is smaller than the preset target time, the pressure value of the corresponding torque part in the set torque-pressure curve is downwards adjusted.
5. The preparation stage self-adaption method comprises the following steps: the method is used for compensating the torque transmission points of the coupling elements and the torque pressure curves of the separating elements, and comprises the steps of for the gear shifting process of power upshift, compensating the torque transmission points of the coupling elements by using the falling of the turbine rotating speed in a preparation stage before the beginning of torque exchange, and reducing the set pressure of the torque transmission points of the coupling elements when the turbine rotating speed is fallen prematurely; the torque-pressure curve of the separating element is compensated by the rise of the turbine speed, and when the turbine speed rises too early (galloping), the pressure value of the corresponding torque part in the torque-pressure curve set by the separating element is adjusted upwards.
Adaptive method in-situ stationary conditions, comprising
6. The second element incorporates an adaptive approach: the method is used for compensating the torque transmission points of the connecting elements, and comprises the steps of slowly connecting one element when the other element is connected, identifying the torque transmission points of the connecting elements according to the change of the decrease of the turbine rotation speed, and controlling the pressure command by the elements which are slowly connected when the turbine rotation speed is decreased to serve as the torque transmission points.
7. The second element oil-filling self-adaption method comprises the following steps: the method is used for compensating the oil filling time of the combined element, and comprises the steps of combining one element with the other element to fill oil under the condition that the other element is combined, identifying the oil filling time of the combined element according to the change of the turbine rotating speed, and taking the time from the beginning of the oil filling of the element to the change of the turbine rotating speed as the oil filling time.
8. N-grade is combined with a certain element self-adaption method: the method is used for compensating the torque transmission points of the combined elements, and comprises the steps of slowly combining a certain element selected by the self-adaptive coordinator under the condition that no element is combined, identifying the torque transmission points of the combined elements according to the change of the decrease of the turbine rotation speed, and controlling the pressure command by the elements which are slowly combined when the turbine rotation speed is decreased to serve as the torque transmission points.
9. The adaptive method for separating a certain element in gear comprises the following steps: the method is used for compensating the torque transmission points of the separation elements, and comprises the steps of stepping on a certain element selected by the self-adaptive coordinator according to gear in separation and combination in a gear state, identifying the torque transmission points of the separation elements according to the rising and changing of the turbine rotating speed, and controlling pressure instructions by the elements slowly separated when the turbine rotating speed rises to serve as the torque transmission points.
The self-adaptive method in the steady-state gear driving condition comprises
10. The third element incorporates an adaptive approach: the method is used for compensating the torque transmission point of the coupling element, and comprises the steps of slowly coupling a third element in a steady-state gear, identifying the torque transmission point of the coupling element according to the change of the decrease of the turbine rotation speed, and controlling a pressure command by the element which is slowly coupled when the turbine rotation speed decreases to serve as the torque transmission point.
11. The self-adaptive method of the viscous point comprises the following steps: the self-adaptive coordinator is used for compensating a torque pressure curve of a separating element according to the change of the rising speed of the turbine under the condition of a steady-state gear, controlling a pressure command by the slowly separated element when the rotating speed of the turbine rises, and compensating the torque-pressure curve according to the input torque at the moment;
12. the micro-sliding self-adaption method comprises the following steps: the method is used for compensating a torque pressure curve, and comprises the steps of slowly reducing the pressure of a certain component selected by the self-adaptive coordinator according to the gear in combination under a steady-state gear until the component has slight rotating speed sliding and is kept for a period of time, and compensating the component torque-pressure curve according to the actual engine torque and the component pressure control value at the moment.
13. The third element oil filling self-adaption method comprises the following steps: and the step of compensating the oil filling time of the combining element is that the third element is filled under the steady-state gear, the oil filling time of the element is identified according to the decrease and change of the turbine rotating speed, and the time from the start of the oil filling of the element to the change of the turbine rotating speed is taken as the oil filling time.
3. The self-adaptive evaluator gathers the oil charge time, torque transmission points and torque pressure curves obtained by different self-adaptive methods of each element, processes the oil charge time, torque transmission points and torque pressure curves, and compensates the oil charge time, torque transmission points and torque pressure curves on preset control data.
1. A method of oil-filled time compensation for an adaptive evaluator, comprising the steps of:
step one, comparing the worst element in the step S2 with the preset oil filling time by using the oil filling time obtained by the self-adaptive method;
step two, obtaining a deviation value, removing a value with larger deviation after the number of the deviation value data is accumulated to a certain extent, and taking an average value of the rest deviation values as a compensation value of the oil filling time of the element;
and thirdly, limiting the storage space of the TCU, discarding the oldest value when the number of stored deviation values reaches the upper storage limit, and adding the latest deviation value into a storage queue.
The system comprises an adaptive coordinator, an adaptive method library, an adaptive evaluator and a gear shifting element control module, wherein the modules are programs in the TCU.
2. A method of transmission point compensation for an adaptive evaluator, comprising the steps of:
step one, comparing the worst element in the step 2 with a preset torque transmission point by using a torque transmission point obtained by a self-adaptive method;
and step two, acquiring a deviation value, removing a value with larger deviation after the number of the deviation value data is accumulated to a certain degree, and taking an average value of the rest deviation values as a compensation value of the torsion point of the element.
And thirdly, limiting the storage space of the TCU, discarding the oldest value when the number of stored deviation values reaches the upper storage limit, and adding the latest deviation value into a storage queue.
3. A method of torque pressure curve compensation for an adaptive evaluator, comprising the steps of:
step one, comparing a torque pressure curve obtained by a self-adaptive method of the worst element in the step 2 with a preset torque pressure curve to obtain a deviation value;
dividing the whole torque pressure deviation curve into a plurality of groups according to different torques, subdividing the lower part of each group into a plurality of torque intervals, wherein the number of the torque intervals in each group is based on actual requirements, and different numbers can be set;
step three, each group separately stores torque pressure deviation value data;
removing a larger deviation value after the number of deviation value data is accumulated to a certain degree in a certain group, and compensating the deviation data on two endpoints of a torque interval by using a linear interpolation method according to different torque intervals for the rest deviation value;
step five, finally splicing the deviation curves of all groups together, and taking the deviation curves as compensation values of the torque pressure curves of the elements after smooth treatment;
and step six, limiting the storage space of the TCU, discarding the oldest value when the number of stored deviation values reaches the upper storage limit, and adding the latest deviation value into a storage queue. (as shown in FIG. 3)
In summary, the adaptive coordinator is used to determine which element to adaptively adjust and which appropriate method to select.
The adaptive control may be implemented in the following cases: steady state gear driving, stationary in place, gear shifting.
The torque pressure curve, torque transfer point, oil charge time of the element should be taken as compensation for the adaptive control, but compensation for other control variables may also be considered.
The acquired deviation data needs to be screened before application.
It will be understood that the invention has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (6)
1. An adaptive control method for an automatic transmission is characterized in that: the method comprises the following steps:
s1, inputting a current driving condition signal into a self-adaptive coordinator;
s2, the self-adaptive coordinator finds out the worst element and selects the current best adaptive method from the self-adaptive method library;
s3, the self-adaptive method triggered by the self-adaptive coordinator transmits a control instruction to the gear shifting element control module, then the self-adaptive method transmits acquired data to the self-adaptive evaluator,
s4, summarizing oil charge time, torque transmission points and torque pressure curves obtained by the worst element in the step 2 by using a corresponding self-adaption method in the self-adaption evaluator, processing the oil charge time, torque transmission points and torque pressure curves, compensating the obtained compensation values to preset control data of the element in the gear shifting element control module,
in S1, the input information of the adaptive coordinator includes a vehicle state, an engine torque/rotation speed, a clutch/hydraulic element state, a shift pre-determination, and road information,
the self-adaptive method library in the S2 comprises self-adaptive control methods under three working conditions of gear shifting, in-situ static and steady-state gear driving; wherein:
adaptive method in gear shifting conditions, comprising
The inertia phase self-adaption method comprises the following steps: the method is used for compensating a torque pressure curve of a combining element, and comprises the steps of comparing an original setting with an actual control value according to an input torque and an average control pressure command in an inertia phase in a power upshift process, and adjusting the preset torque pressure curve of the combining element;
element bonding adaptation method: the method is used for compensating the combination of the combination element and the torque transmission point, and comprises the steps of identifying the torque transmission point of the combination element according to the change of the turbine rotation speed in the gear shifting in static gear shifting in situ, comparing the originally set time from the end of the oil filling stage which actually occurs to the time when the turbine rotation speed changes, and adjusting the set pressure of the torque transmission point;
the self-adaptive method for gear shifting and oil filling comprises the following steps: the method is used for compensating the oil filling time of the coupling element, and comprises the steps of compensating the oil filling time of the coupling element according to the reduction of the rotation speed of the turbine in the oil filling stage when the gear shifting starts;
the torque phase time self-adaption method comprises the following steps: the method is used for compensating the torque pressure curve of the coupling element, and comprises the steps of adjusting the preset torque pressure curve of the coupling element according to the torque phase completion time for the gear shifting of the torque-rotating speed sequence;
the preparation stage self-adaption method comprises the following steps: the method is used for compensating the torque transmission points of the coupling element and the torque pressure curves of the separating element, and comprises the steps of compensating the torque transmission points of the coupling element by using the turbine rotation speed in a preparation stage before the beginning of torque exchange in a gear shifting process of power upshift; the disconnect element torque pressure curve is compensated with a turbine speed increase.
2. The adaptive control method of an automatic transmission according to claim 1, characterized in that: the self-adaptive method in the in-situ static working condition in the S2 comprises the following steps of
The second element incorporates an adaptive approach: the method is used for compensating the torque transmission points of the combined elements, and comprises the steps of slowly combining one element under the condition that the other element is combined, identifying the torque transmission points of the combined elements according to the change of the decrease of the rotation speed of the turbine, and controlling the pressure command by the elements which are slowly combined when the rotation speed of the turbine is decreased to serve as the torque transmission points;
the second element oil-filling self-adaption method comprises the following steps: the method is used for compensating the oil filling time of the combined element, and comprises the steps of combining one element with the other element to fill oil under the condition that the other element is combined, identifying the oil filling time of the combined element according to the change of the decrease of the rotation speed of the turbine, and taking the time from the beginning of the oil filling of the element to the change of the rotation speed of the turbine as the oil filling time;
n-grade is combined with a certain element self-adaption method: the method is used for compensating the torque transmission points of the combined elements, and comprises the steps of slowly combining a certain element selected by the self-adaptive coordinator under the condition that no element is combined, identifying the torque transmission points of the combined elements according to the change of the decrease of the rotation speed of the turbine, and controlling the pressure command by the elements which are slowly combined when the rotation speed of the turbine is decreased to serve as the torque transmission points;
the adaptive method for separating a certain element in gear comprises the following steps: the method is used for compensating the torque transmission points of the separation elements, and comprises the steps of stepping on a certain element selected by the self-adaptive coordinator according to gear in separation and combination in a gear state, identifying the torque transmission points of the separation elements according to the rising and changing of the turbine rotating speed, and controlling pressure instructions by the elements slowly separated when the turbine rotating speed rises to serve as the torque transmission points.
3. The adaptive control method of an automatic transmission according to claim 1, characterized in that: the self-adaptive method in the steady-state gear driving working condition in the S2 comprises the following steps of
The third element incorporates an adaptive approach: the method is used for compensating the torque transmission point of the combining element, and comprises the steps of slowly combining a third element in a steady-state gear, identifying the torque transmission point of the combining element according to the change of the decrease of the rotation speed of the turbine, and controlling a pressure instruction by the element which is slowly combined when the rotation speed of the turbine decreases to serve as the torque transmission point;
the self-adaptive method of the viscous point comprises the following steps: the self-adaptive coordinator is used for compensating a torque pressure curve of a separating element according to the change of the rising speed of the turbine under the condition of a steady-state gear, controlling a pressure command by the slowly separated element when the rotating speed of the turbine rises, and compensating the torque-pressure curve according to the input torque at the moment;
the micro-sliding self-adaption method comprises the following steps: the method comprises the steps of slowly reducing the pressure of a certain element selected by the self-adaptive coordinator according to the gear in combination under a steady-state gear until the element has slight rotation speed sliding and is kept for a period of time, and compensating the torque-pressure curve of the element according to the actual engine torque and the element pressure control value at the moment;
the third element oil filling self-adaption method comprises the following steps: and the step of compensating the oil filling time of the combining element is that the third element is filled under the steady-state gear, the oil filling time of the element is identified according to the decrease and change of the turbine rotating speed, and the time from the start of the oil filling of the element to the change of the turbine rotating speed is taken as the oil filling time.
4. The adaptive control method of an automatic transmission according to claim 1, characterized in that: the method for compensating the oil filling time of the self-adaptive evaluator in the S4 comprises the following steps:
step one, comparing the worst element in the step S2 with the preset oil filling time by using the oil filling time obtained by the self-adaptive method;
step two, obtaining a deviation value, removing a value with larger deviation after the number of the deviation value data is accumulated to a certain extent, and taking an average value of the rest deviation values as a compensation value of the oil filling time of the element;
and thirdly, limiting the storage space of the TCU, discarding the oldest value when the number of stored deviation values reaches the upper storage limit, and adding the latest deviation value into a storage queue.
5. The adaptive control method of an automatic transmission according to claim 1, characterized in that: the method for compensating the transmission torsion point of the self-adaptive estimator in the S4 comprises the following steps:
step one, comparing the worst element in the step 2 with a preset torque transmission point by using a torque transmission point obtained by a self-adaptive method;
step two, obtaining deviation values, removing the value with larger deviation after the number of the deviation value data is accumulated to a certain degree, averaging the rest deviation values to be used as compensation values of the torsion points of the element,
and thirdly, limiting the storage space of the TCU, discarding the oldest value when the number of stored deviation values reaches the upper storage limit, and adding the latest deviation value into a storage queue.
6. The adaptive control method of an automatic transmission according to claim 5, characterized in that: the method for compensating the torque pressure curve of the self-adaptive estimator in the S4 comprises the following steps:
step one, comparing a torque pressure curve obtained by a self-adaptive method of the worst element in the step 2 with a preset torque pressure curve to obtain a deviation value;
dividing the whole torque pressure deviation curve into a plurality of groups according to different torques, subdividing the lower part of each group into a plurality of torque intervals, and setting different numbers of torque intervals in each group based on actual requirements;
step three, each group separately stores torque pressure deviation value data;
removing a larger deviation value after the number of deviation value data is accumulated to a certain degree in a certain group, and compensating the deviation data on two endpoints of a torque interval by using a linear interpolation method according to different torque intervals for the rest deviation value;
step five, finally splicing the deviation curves of all groups together, and taking the deviation curves as compensation values of the torque pressure curves of the elements after smooth treatment;
and step six, limiting the storage space of the TCU, discarding the oldest value when the number of stored deviation values reaches the upper storage limit, and adding the latest deviation value into a storage queue.
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| US5211079A (en) * | 1990-01-11 | 1993-05-18 | General Motors Corporation | Method of adaptive control for closed throttle downshift in an automatic transmission |
| US5151858A (en) * | 1990-10-05 | 1992-09-29 | Saturn Corporation | Multiple mode adaptive pressure control for an automatic transmission |
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