CN114412986B - Intelligent control method and device for AMT gearbox intermediate shaft braking and vehicle - Google Patents
Intelligent control method and device for AMT gearbox intermediate shaft braking and vehicle Download PDFInfo
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- CN114412986B CN114412986B CN202111630498.6A CN202111630498A CN114412986B CN 114412986 B CN114412986 B CN 114412986B CN 202111630498 A CN202111630498 A CN 202111630498A CN 114412986 B CN114412986 B CN 114412986B
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- intermediate shaft
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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
- F16H61/0202—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 electric
- F16H61/0204—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 electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The application belongs to the field of automobiles, and particularly discloses an intelligent control method, a control device and a vehicle for braking an intermediate shaft of an AMT (automated mechanical transmission), wherein the intelligent control method for braking the intermediate shaft of the AMT comprises the steps of calculating the speed reduction rate of the intermediate shaft; calculating the difference value between the rotation speed reduction rate of the intermediate shaft and the optimal rotation speed reduction rate of the intermediate shaft; comparing the difference value with a preset value a, wherein a is more than 0; and reducing the duty cycle on the basis of the basic duty cycle according to the difference value being larger than the preset value a. The application has the effects of improving the gear shifting success rate and shortening the gear shifting time.
Description
Technical Field
The application relates to the technical field of automobiles, in particular to an intelligent control method and device for braking an intermediate shaft of an AMT gearbox and a vehicle.
Background
This section provides merely background information related to the present disclosure and is not necessarily prior art.
The synchronous gear shifting process of the AMT gearbox without the synchronizer is needed to be completed through intermediate shaft braking when starting and shifting, the traditional intermediate shaft braking control method adopts 100% to drive the intermediate shaft braking valve to complete the braking process, but after the intermediate shaft braking valve is driven by full force, the rotating speed of the intermediate shaft is fast to drop, and the gear shifting failure is easy to cause.
Disclosure of Invention
The application aims to at least solve the problems that the rotation speed of an intermediate shaft is fast to drop and the gear is easy to fail. The aim is achieved by the following technical scheme:
the first aspect of the application provides an intelligent control method for braking an intermediate shaft of an AMT gearbox, which comprises the following steps:
calculating the speed of rotation reduction of the intermediate shaft;
calculating the difference value between the rotation speed reduction rate of the intermediate shaft and the optimal rotation speed reduction rate of the intermediate shaft;
comparing the difference value with a preset value a, wherein a is more than 0;
and reducing the duty cycle on the basis of the basic duty cycle according to the difference value being larger than the preset value a.
According to the intelligent control method for braking the intermediate shaft of the AMT gearbox, the optimal basic duty ratio is found out by setting the values of different duty ratios, the optimal speed reduction rate of the intermediate shaft is calculated, the basic duty ratio is taken as basic input of a control method, the optimal speed reduction rate of the intermediate shaft is taken as a target, the speed of the intermediate shaft is dynamically adjusted and controlled, the gear shifting success rate is improved, and meanwhile, the gear shifting time is shortened.
In addition, the intelligent control method for braking the intermediate shaft of the AMT gearbox can also have the following additional technical characteristics:
in some embodiments of the present application, determining whether the difference is less than a preset value-a based on the difference being less than a preset value a;
and increasing the duty ratio on the basis of the basic duty ratio according to the difference value smaller than the preset value-a.
In some embodiments of the application, the base duty cycle is not changed according to the difference value not being less than a preset value-a.
In some embodiments of the application, the preset value a is 20.
In some embodiments of the application, the preset value-a is-20.
In some embodiments of the present application, the selection of the basic duty cycle employs the following steps:
starting from 10% duty ratio, driving a brake valve of an intermediate shaft every 10% duty ratio, repeating n times, driving n times every duty ratio, and calculating a gear shifting success rate;
judging whether the gear shifting success rate is greater than a preset value b%;
the gear shifting success rate is larger than the preset value b%, and the duty ratio with the shortest gear shifting time is taken as the basic duty ratio.
In some embodiments of the application, the preset value b% is 90%.
In some embodiments of the application, the optimal countershaft speed reduction rate is calculated under a base duty cycle drive.
A second aspect of the present application provides a control apparatus comprising
The device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the rotating speed of the intermediate shaft and the speed of the reduction of the rotating speed of the intermediate shaft;
the comparison unit is used for determining a duty ratio corresponding to the shortest gear shifting time, comparing the difference value of the speed reduction rate of the intermediate shaft rotating speed with the speed reduction rate of the optimal intermediate shaft rotating speed with a preset value a and a preset value-a respectively, and comparing the gear shifting success rate with a preset value b%;
and the control unit is used for controlling a brake valve of the transmission.
A third aspect of the application proposes a vehicle having the control device described above.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a flow chart of the present application for selecting a base duty cycle and an optimal countershaft rotational speed reduction rate;
fig. 2 is a flowchart of a method of controlling an intermediate shaft according to the present application.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.
An intelligent control method and device for braking of an intermediate shaft of an AMT gearbox and a vehicle are provided. As shown in fig. 1 and fig. 2, the first aspect of the present application proposes an intelligent control method for braking an intermediate shaft of an AMT gearbox, which is configured to implement dynamic control of an opening degree of a brake valve of the intermediate shaft of the AMT gearbox according to a requirement that the intermediate shaft is braked to complete a synchronous gear shifting process when a vehicle is in a starting state, thereby improving a gear shifting success rate.
In some embodiments of the present application, as shown in fig. 1 and 2, the intelligent control method for braking an intermediate shaft of an AMT gearbox includes:
calculating the speed of rotation reduction of the intermediate shaft;
calculating the difference value between the rotation speed reduction rate of the intermediate shaft and the optimal rotation speed reduction rate of the intermediate shaft;
comparing the difference value with a preset value a, wherein a is more than 0;
and reducing the duty cycle on the basis of the basic duty cycle according to the difference value being larger than the preset value a.
A base duty cycle is calculated. First, starting from 10% duty ratio, driving the brake valve of the intermediate shaft with 10% duty ratio as increment, repeating n times, in this embodiment, taking 10 as n, until 100% of the brake valve of the intermediate shaft is driven, and setting the same gear shift point rotation speed. Each duty cycle drives the intermediate shaft brake valve 10 times, and the gear shift success rate is calculated. The n is taken to 10, so that the duty ratio can be evenly divided, and meanwhile, the accuracy of acquiring the basic duty ratio is improved.
Firstly, judging whether the gear shifting success rate is larger than a preset value b percent or not. In this embodiment, the b% is 90% so as to further improve the accuracy of obtaining the basic duty cycle. And screening out the driving duty ratio with the gear shifting success rate of more than 90%, and selecting the duty ratio with the shortest gear shifting time as the basic driving duty ratio when calculating the gear shifting time of the duty ratio driving.
And driving the intermediate shaft brake valve under the condition of basic duty ratio, and calculating the speed of rotation reduction after the rotation speed of the intermediate shaft is reduced, wherein the speed of rotation reduction is used as the optimal speed of rotation reduction of the intermediate shaft. The speed of decrease of the intermediate shaft is obtained by dividing the speed of the intermediate shaft by the time taken by the difference between the starting speed of the intermediate shaft and the speed of the intermediate shaft after the decrease.
The optimal basic duty ratio is found out by setting values of different duty ratios, the optimal speed reduction rate of the intermediate shaft is calculated, the basic duty ratio is used as basic input of a control method, the optimal speed reduction rate of the intermediate shaft is used as a target, the speed of the intermediate shaft is dynamically adjusted, stable and controllable speed of the intermediate shaft is realized, the gear shifting success rate is effectively improved, and the gear shifting time is shortened.
And calculating the speed of the reduction of the rotating speed of the intermediate shaft in real time. In the gear shifting process, the basic duty ratio is used as a control original value, the optimal intermediate shaft rotating speed reducing speed is used as a control target, the intermediate shaft rotating speed reducing speed is calculated in real time in the gear shifting process, and the actual intermediate shaft rotating speed reducing speed is differed from the optimal intermediate shaft rotating speed reducing speed.
Whether the difference is greater than a preset value a is determined, wherein the preset value a is 20 in this embodiment. And when the difference value is larger than a preset value 20, the duty ratio is reduced on the basis of the basic duty ratio.
When the difference is smaller than the preset value 20, it is determined whether the difference is smaller than the preset value-a, which is-20 in this embodiment. When the difference value is smaller than a preset value of-20, the duty ratio is increased on the basis of the basic duty ratio; when the difference is not less than the preset value-20, the basic duty cycle is not changed. On the basis of the basic duty ratio, the basic duty ratio is increased or decreased in real time according to the difference change of the actual intermediate shaft rotating speed decreasing speed and the optimal intermediate shaft rotating speed decreasing speed, so that the high gear shifting success rate and the gear shifting efficiency are realized.
The second aspect of the application provides a control device for executing the intelligent control method for braking the intermediate shaft of the AMT gearbox, which comprises an acquisition unit and a comparison unit acquisition unit, wherein the acquisition unit is used for acquiring a basic duty ratio, an intermediate shaft rotating speed and an intermediate shaft rotating speed reducing rate.
The comparison unit is used for determining a duty ratio corresponding to the shortest gear shifting time, comparing the difference value of the speed reduction rate of the intermediate shaft rotating speed with the speed reduction rate of the optimal intermediate shaft rotating speed with a preset value 20 and a preset value-20 respectively, and comparing the gear shifting success rate with a preset value 90%.
And the control unit is used for controlling a brake valve of the transmission.
Through the control device in this technical scheme, adopt the integrated configuration of acquisition unit, contrast unit and control unit, can acquire basis duty cycle, jackshaft rotational speed decline rate and the speed of optimum jackshaft rotational speed decline rate through acquisition unit, then compare jackshaft rotational speed decline rate and the difference of the speed of optimum jackshaft rotational speed decline rate with default 20 through contrast unit, finally control the increase and decrease of basis duty cycle through control unit to realize high gear shifting success rate and improve gear shifting efficiency.
A third aspect of the application proposes a vehicle having the above control device. Through using the vehicle in this technical scheme, through using the controlling means in this technical scheme, adopt the integrated configuration of acquisition unit, contrast unit and control unit, can acquire basis duty cycle, jackshaft rotational speed decline rate and the speed decline rate of optimal jackshaft rotational speed through acquisition unit, then compare jackshaft rotational speed decline rate and the difference of optimal jackshaft rotational speed decline rate with default 20 through contrast unit, finally control the increase and decrease of basis duty cycle through control unit, thereby realize high gear shifting success rate and improve gear shifting efficiency.
The present application is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.
Claims (9)
1. An intelligent control method for braking an intermediate shaft of an AMT gearbox is characterized by comprising the following steps of
Calculating the speed of rotation reduction of the intermediate shaft;
calculating the difference value between the rotation speed reduction rate of the intermediate shaft and the optimal rotation speed reduction rate of the intermediate shaft;
comparing the difference value with a preset value a, wherein a is more than 0;
reducing the duty cycle on the basis of the basic duty cycle according to the difference value being greater than a preset value a;
the selection of the basic duty ratio comprises the following steps:
starting from 10% duty ratio, driving a brake valve of an intermediate shaft every 10% duty ratio, repeating n times, driving n times every duty ratio, and calculating a gear shifting success rate;
judging whether the gear shifting success rate is greater than a preset value b%;
the gear shifting success rate is larger than the preset value b%, and the duty ratio with the shortest gear shifting time is taken as the basic duty ratio.
2. The intelligent control method for braking an intermediate shaft of an AMT gearbox according to claim 1, wherein whether the difference is smaller than a preset value-a is judged according to the difference being smaller than a preset value a;
and increasing the duty ratio on the basis of the basic duty ratio according to the difference value smaller than the preset value-a.
3. The intelligent control method for braking an intermediate shaft of an AMT gearbox according to claim 2, characterized in that the basic duty ratio is not changed according to the difference value not smaller than a preset value-a.
4. The intelligent control method for braking an intermediate shaft of an AMT gearbox according to claim 2, wherein the preset value a is 20.
5. The intelligent control method for braking an intermediate shaft of an AMT gearbox according to claim 3, wherein the preset value-a is-20.
6. The intelligent control method for braking an intermediate shaft of an AMT gearbox according to claim 1, wherein the preset value b% is 90%.
7. The intelligent control method for braking an intermediate shaft of an AMT gearbox according to claim 1, wherein the optimal intermediate shaft speed reduction rate is calculated under the driving of a basic duty cycle.
8. A control device for performing the intelligent control method for braking an intermediate shaft of an AMT gearbox according to any one of claims 1-7, characterized in that the control device comprises
The device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the rotating speed of the intermediate shaft and the speed of the reduction of the rotating speed of the intermediate shaft;
the comparison unit is used for determining a duty ratio corresponding to the shortest gear shifting time, comparing the difference value of the speed reduction rate of the intermediate shaft rotating speed with the speed reduction rate of the optimal intermediate shaft rotating speed with a preset value a and a preset value-a respectively, and comparing the gear shifting success rate with a preset value b%;
and the control unit is used for controlling a brake valve of the transmission.
9. A vehicle characterized by having the control device recited in claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111630498.6A CN114412986B (en) | 2021-12-28 | 2021-12-28 | Intelligent control method and device for AMT gearbox intermediate shaft braking and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111630498.6A CN114412986B (en) | 2021-12-28 | 2021-12-28 | Intelligent control method and device for AMT gearbox intermediate shaft braking and vehicle |
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| CN114412986A CN114412986A (en) | 2022-04-29 |
| CN114412986B true CN114412986B (en) | 2023-08-18 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115013520B (en) * | 2022-06-17 | 2024-05-17 | 潍柴动力股份有限公司 | AMT gearbox intermediate shaft braking control method, device and controller |
| CN115031019A (en) * | 2022-07-04 | 2022-09-09 | 一汽解放汽车有限公司 | Brake control method, device, controller and medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005207569A (en) * | 2003-12-25 | 2005-08-04 | Toyota Motor Corp | Shift control device for vehicle drive mechanism with continuously variable transmission |
| CN109849918A (en) * | 2019-03-28 | 2019-06-07 | 潍柴动力股份有限公司 | A kind of starting control method and device for carrying AMT vehicle |
| CN111120642A (en) * | 2020-01-10 | 2020-05-08 | 一汽解放汽车有限公司 | AMT intermediate shaft brake pneumatic control method based on double PWM valves |
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2021
- 2021-12-28 CN CN202111630498.6A patent/CN114412986B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005207569A (en) * | 2003-12-25 | 2005-08-04 | Toyota Motor Corp | Shift control device for vehicle drive mechanism with continuously variable transmission |
| CN109849918A (en) * | 2019-03-28 | 2019-06-07 | 潍柴动力股份有限公司 | A kind of starting control method and device for carrying AMT vehicle |
| CN111120642A (en) * | 2020-01-10 | 2020-05-08 | 一汽解放汽车有限公司 | AMT intermediate shaft brake pneumatic control method based on double PWM valves |
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| CN114412986A (en) | 2022-04-29 |
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