CN108099895A - A kind of control method and device of the Shifting of AMT - Google Patents

Abstract

The invention discloses a control method and device for an AMT shift strategy, which stores accelerator opening data, and analyzes the vehicle running state through the proportion of the accelerator opening, and then updates the existing shift strategy according to the actual vehicle usage. In turn, the engine works in a reasonable range, which fully meets the actual driving conditions of the vehicle and the power demand of the driver.

Description

A control method and device for shifting strategy of AMT

technical field

The present invention relates to the technical field of AMT (Automated Mechanical Transmission, electromechanical automatic transmission), more specifically, to a control method and device for an AMT shift strategy.

Background technique

AMT is the abbreviation of electronically controlled mechanical automatic transmission. It is an automatic transmission system controlled by a microcomputer on the basis of a dry clutch and a gear transmission.

At present, AMT's shift strategies include dynamic, economical and comprehensive. It can also identify the weight of the vehicle, road environment and driving intentions, and distinguish between different shift strategies for slopes, curves, braking, etc. However, these shifting strategies are all fixed strategies set when the vehicle leaves the factory; however, the actual operating conditions and road conditions of the vehicle vary greatly, as well as the driving habits of the driver. Therefore, the fixed shift control It is difficult for the strategy to meet the actual driving conditions of the vehicle and the power demand of the driver.

Contents of the invention

In view of this, the present invention proposes an AMT shift strategy control method and device, in order to fully meet the actual driving conditions of the vehicle and the driver's power demand.

In order to achieve the above purpose, the proposed scheme is as follows:

A control method for a shift strategy of an AMT, comprising:

When the engine is on and the throttle opening is greater than zero, start to read and store the throttle opening every preset time;

judging whether the number of stored accelerator opening values is equal to a preset number threshold;

If the number of the stored throttle opening values is equal to the preset number threshold, it is counted whether the ratio of the number of throttle opening values within the preset first throttle opening range to the number threshold is greater than the preset Set the first ratio, if yes, reduce the gear and downshift the vehicle speed, if not, count whether the ratio of the number of throttle opening values within the preset second throttle opening range to the number threshold is greater than the preset second ratio;

If the ratio of the number of accelerator opening values in the preset second throttle opening range to the number threshold is greater than the preset second ratio, then increase the gear and upshift the vehicle speed, and the second throttle opening range The maximum value is smaller than the minimum value of the first throttle opening range.

Preferably, before the step of counting whether the ratio of the number of throttle opening values within the preset first throttle opening range to the number threshold is greater than the preset first ratio, the method further includes:

Count whether the ratio of the number of accelerator opening values within the preset third opening range to the number threshold is greater than the preset third ratio, and if so, perform the statistics in the preset first throttle opening range the step of whether the ratio of the number of throttle opening values in the range to the number threshold is greater than a preset first ratio, the maximum value of the third opening range is smaller than the minimum value of the first throttle opening range, The minimum value of the third opening range is greater than the maximum value of the second throttle opening range.

Preferably, said lowering the gear and downshifting the vehicle speed specifically includes:

The new downshift strategy is calculated by the first formula and replaces the original downshift strategy, and the first formula is:

Wherein, V2 is the new downshift vehicle speed, V1 is the original downshift vehicle speed, V9 is the highest shift vehicle speed, B3 is the third ratio, P2 is the number of throttle opening values in the third opening range and the above-mentioned The ratio of the number threshold.

Preferably, said increasing the gear and upshifting the vehicle speed specifically includes:

The new upshift strategy is calculated by the second formula and replaces the original upshift strategy, and the second formula is:

Wherein, V4 is the new upshift vehicle speed, V3 is the original upshift vehicle speed, V0 is the minimum shift speed, B3 is the third ratio, P2 is the number of throttle opening values in the third opening range and the above-mentioned The ratio of the number threshold.

A control device for a shift strategy of an AMT, comprising:

The data acquisition and storage unit is used to read and store the throttle opening value every preset time when the engine is on and the throttle opening is greater than zero;

The first judging unit is used to judge whether the number of stored accelerator opening values is equal to the preset number threshold, and if so, execute the second judging unit;

The second judging unit is used to count whether the ratio of the number of throttle opening values within the preset first throttle opening range to the number threshold is greater than the preset first ratio, and if so, execute the first The shift strategy update unit, if not, execute the third judging unit;

The first shift strategy update unit is used to reduce the gear position and downshift the vehicle speed;

The third judging unit is used to count whether the ratio of the number of throttle opening values within the preset second throttle opening range to the number threshold is greater than the preset second ratio, and if so, execute the second Shift strategy updating unit;

The second gear shift strategy update unit is used to increase the vehicle speed for upshifting gears, and the maximum value of the second throttle opening range is smaller than the minimum value of the first throttle opening range.

Preferably, the device also includes:

The fourth judging unit is used to count whether the ratio of the number of accelerator opening values within the preset third opening range to the number threshold is greater than the preset third ratio before executing the second judging unit, If yes, execute the second judging unit, the maximum value of the third opening range is smaller than the minimum value of the first accelerator opening range, and the minimum value of the third opening range is greater than the second throttle opening range The maximum value of the opening range.

Preferably, the first shift strategy updating unit is specifically used for:

The new downshift strategy is calculated by the first formula and replaces the original downshift strategy, and the first formula is:

Wherein, V2 is the new downshift vehicle speed, V1 is the original downshift vehicle speed, V9 is the highest shift vehicle speed, B3 is the third ratio, P2 is the number of throttle opening values in the third opening range and the above-mentioned The ratio of the number threshold.

Preferably, the second shift strategy updating unit is specifically used for:

The new upshift strategy is calculated by the second formula and replaces the original upshift strategy, and the second formula is:

Wherein, V4 is the new upshift vehicle speed, V3 is the original upshift vehicle speed, V0 is the minimum shift speed, B3 is the third ratio, P2 is the number of throttle opening values in the third opening range and the above-mentioned Ratio of number threshold

Compared with the prior art, the technical solution of the present invention has the following advantages:

The above-mentioned technical solution provides a control method and device for an AMT shift strategy, which stores the data of the throttle opening, and analyzes the vehicle running state through the ratio of the throttle opening, and then performs the existing shift strategy according to the actual vehicle usage. Update, and then make the engine work in a reasonable range, which fully meets the actual driving conditions of the vehicle and the power demand of the driver.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a flowchart of a method for controlling a shift strategy of an AMT provided by an embodiment of the present invention;

FIG. 2 is a flowchart of another AMT shift strategy control method provided by an embodiment of the present invention;

3 is a schematic diagram of an upshift strategy in the shift control strategy of the AMT;

FIG. 4 is a schematic structural diagram of a control device for an AMT shift strategy provided by an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of another device for controlling a gear shift strategy of an AMT provided by an embodiment of the present invention.

Detailed ways

The existing fixed shift control strategy is difficult to meet the actual driving conditions of the vehicle and the driver's power demand. The control method of the AMT shift strategy provided by the present invention analyzes the operating state of the vehicle in the latest period through historical throttle opening data. Calculate and optimize the shift control strategy that is more suitable for the vehicle, and update it in real time, improving the user's satisfaction with power performance and subsequent consumption.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment one

This embodiment provides a method for controlling the shift strategy of an AMT. Referring to FIG. 1, the method may include:

Step S11: When the engine is on and the accelerator opening is greater than zero, start to read and store the accelerator opening every preset time.

Specifically, when the engine is on and the accelerator opening is greater than zero, the accelerator opening value can be read once per second, counted, and the read accelerator opening value can be stored in the memory of the controller.

Step S12: judging whether the stored number N1 of the throttle opening value is equal to the preset number threshold N0, if yes, execute step S13.

When the number N1 of the stored accelerator opening values is too small, there is no guiding significance for the update of the shift strategy. Therefore, only when the number N1 of the stored accelerator opening values exceeds the preset number threshold N0, follow-up A step of.

Step S13: Count whether the ratio of the number N11 of throttle opening values within the preset first throttle opening range to the number threshold N0 is greater than the preset first ratio B1, if yes, go to step S14, if not, Then step S15 is executed.

Step S14: Downshifting vehicle speed of the lower gear position.

The present invention judges the intention and demand of the driver through the proportion of the throttle opening. When the driver often needs strong power but the vehicle power is insufficient, the proportion of large throttle opening will be higher. The preset first throttle opening range is the maximum throttle opening range. The lower the transmission gear, the stronger the power. By reducing the downshifting speed of each gear, the vehicle can work more in lower gears, which improves the power performance and meets the driver's stronger power demand. At the same time, it can also make the engine work in an efficient throttle opening range. Improved economy.

Step S15: Count whether the ratio of the number N12 of accelerator opening values within the preset second throttle opening range to the preset number threshold N0 is greater than the preset second ratio B2, and if so, execute the step S16.

Step S16: increasing the gear and upshifting the vehicle speed, the maximum value of the second throttle opening range is smaller than the minimum value of the first throttle opening range.

Due to light load, low driving speed, no need for rapid acceleration, no overtaking, low road gradient, etc., when the vehicle is often running at low load, the proportion of small throttle opening will be high, which is manifested as excess power. By increasing the upshifting speed of a gear, the vehicle can work more in a higher gear, so that the engine can work in an efficient throttle opening range. The higher the gearbox gear, the better the economy, which improves the economy of driving.

Specifically, the preset number threshold N0 can be 130,000 times. If the throttle opening is read once per second, the stored throttle opening can also be judged by judging whether the time for storing the throttle opening value has reached 130,000 seconds. Whether the number N1 of degree values is equal to the preset number threshold N0 avoids the need to count each time data is recorded.

Specifically, the first throttle opening range may be 80%-100%, and the second throttle opening range may be 0%-40%. The minimum value and maximum value of the first throttle opening range refer to 80% and 100% respectively; the minimum value and maximum value of the second throttle opening range refer to 0% and 40% respectively. The maximum value of the second throttle opening range is smaller than the minimum value of the first throttle opening range, which means that the maximum value of 40% of the second throttle opening range is smaller than the minimum value of 80% of the first throttle opening range.

This embodiment provides the control method of the gear shift strategy of AMT, stores the throttle opening data, and analyzes the vehicle running state through the ratio of the throttle opening, and then updates the existing gear shift strategy according to the actual vehicle usage, so that the engine It works within a reasonable range, which fully meets the actual driving conditions of the vehicle and the power demand of the driver.

Embodiment two

This embodiment provides another method for controlling the shift strategy of the AMT. Referring to FIG. 2, the method may include:

Step S21: When the engine is on and the accelerator opening is greater than zero, start to read and store the accelerator opening every preset time.

Specifically, when the engine is on and the accelerator opening is greater than zero, the accelerator opening value can be read once per second, counted, and the read accelerator opening value can be stored in the memory of the controller.

Step S22: Judging whether the stored number N1 of the throttle opening value is equal to the preset number threshold N0, if yes, execute step S23.

When the number N1 of the stored accelerator opening values is too small, there is no guiding significance for the update of the shift strategy. Therefore, only when the number N1 of the stored accelerator opening values exceeds the preset number threshold N0, follow-up A step of.

Step S23: Count whether the ratio of the number N13 of throttle openings within the preset third opening range to the number threshold N0 is greater than the preset third ratio B3, and if so, execute step S24.

The maximum value of the third opening range is smaller than the minimum value of the first accelerator opening range, and the minimum value of the third opening range is greater than the maximum value of the second accelerator opening range. Specifically, the first throttle opening range may be 80%-100%, the second throttle opening range may be 0%-40%, and the third throttle opening range may be 40%-80%. The third throttle opening range is the normal throttle opening range. If the statistical result is that the throttle opening value is mainly in the normal throttle opening range, that is, neither the large throttle opening nor the small throttle opening, no strategy change is required. .

Step S24: Count whether the ratio of the number N11 of throttle opening values within the preset first throttle opening range to the number threshold N0 is greater than the preset first ratio B1, if yes, go to step S25, if not, Then execute step S26.

Step S25: Downshift the vehicle speed in the lower gear position.

The present invention judges the intention and demand of the driver through the proportion of the throttle opening. When the driver often needs strong power but the vehicle power is insufficient, the proportion of large throttle opening will be higher. The preset first throttle opening range is the maximum throttle opening range. The lower the transmission gear, the stronger the power. By reducing the downshifting speed of each gear, the vehicle can work more in lower gears, which improves the power performance and meets the driver's stronger power demand. At the same time, it can also make the engine work in an efficient throttle opening range. Improved economy.

Step S26: Count whether the ratio of the number N12 of accelerator opening values within the preset second throttle opening range to the preset number threshold N0 is greater than the preset second ratio B2, and if so, execute the step S27.

Step S27: increasing the gear and upshifting the vehicle speed, the maximum value of the second accelerator opening range is smaller than the minimum value of the first accelerator opening range.

Due to light load, low driving speed, no need for rapid acceleration, no overtaking, low road gradient, etc., when the vehicle is often running at low load, the proportion of small throttle opening will be high, which is manifested as excess power. By increasing the upshifting speed of a gear, the vehicle can work more in a higher gear, so that the engine can work in an efficient throttle opening range. The higher the gearbox gear, the better the economy, which improves the economy of driving.

Referring to FIG. 3 , it is an illustration of the upshift strategy in the shift control strategy of the AMT. The vehicle controller determines whether to shift gears according to the number of vehicles and the throttle opening, and has different shift curves in different gear positions. The vehicle controller will collect vehicle speed (abscissa) and accelerator opening (ordinate) information, and if the coordinate point is on the right side of the current gear shift line, the gear will be shifted to a higher gear. When the vehicle is delivered to the customer, the vehicle controller has already stored the shift control rules shown in Figure 3, which are obtained by the vehicle manufacturer through calculation, analysis and induction. The present invention modifies the gear position and upshifts the vehicle speed, that is, shifts the shift curve to the left or to the right.

The step of increasing the speed of gear upshifts specifically includes:

The new upshift strategy is calculated by the second formula and replaces the original upshift strategy, and the second formula is:

Wherein, V4 is the new upshift vehicle speed, V3 is the original upshift vehicle speed, V0 is the minimum shift speed, B3 is the third ratio, P2 is the number of throttle opening values in the third opening range and the above-mentioned The ratio of the number threshold.

The shift curve corresponding to each gear position includes a minimum shift speed V0. When V0 is very low, it will cause the vehicle to change to a higher gear just after starting, so that the engine speed is lower than the minimum operating speed (idling speed), resulting in flameout; the higher the gear, the worse the power, if the minimum shift speed V0 is small , will cause the whole vehicle to run in the high-end position most of the time, and the power performance of the whole vehicle will not meet the user's needs; the emission regulations of some models require the whole vehicle to run for a period of typical working conditions, and different shift rules will cause the engine to run at different Speed and torque affect the emission test results. The above emission, stability and minimum power requirements have minimum target values in the design of the whole vehicle, and the minimum shift speed V0 that reaches the minimum target value can be found through vehicle simulation and test verification.

The downshift strategy and the upshift strategy in the shift control strategy for AMT are similar and both are prior art, and will not be described in detail in this embodiment.

The step of reducing the gear and downshifting the vehicle speed specifically includes:

The new downshift strategy is calculated by the first formula and replaces the original downshift strategy, and the first formula is:

Wherein, V2 is the new downshift vehicle speed, V1 is the original downshift vehicle speed, V9 is the highest shift vehicle speed, B3 is the third ratio, P2 is the number of throttle opening values in the third opening range and the above-mentioned The ratio of the number threshold.

The shift curve corresponding to each gear contains a highest shift car V9. When the V9 is very high, it will cause the engine to change to a higher gear at a very high speed. If the speed is too high, the vehicle will feel very frustrated; the lower the gear, the worse the economy. If the highest shifting car has a high V9, it will As a result, the whole vehicle runs in low gear most of the time, and the economy of the whole vehicle cannot meet the needs of the whole vehicle; the emission regulations of some models require the whole vehicle to run for a period of typical working conditions, and different shift rules will cause the engine to run at different speeds And torque, affect the emission test results. The above emission, stability and minimum economy requirements all have minimum target values in vehicle design. Through vehicle simulation and test verification, it is possible to find out the highest shifting car V9 that meets the minimum target values.

It should be noted that the number N1 of the throttle opening value stored in statistics is equal to the preset number threshold N0 each time, and after subsequent judgments, the stored throttle opening value data needs to be cleared, and Start storing and counting again. For example, it is calculated that the ratio of the number N13 of the throttle opening value in the third opening range to the number threshold N0 is not greater than the preset third ratio B3, then the stored throttle opening value data is cleared, and Restart storage and counting; or, the ratio of the number N11 of throttle opening values within the preset first throttle opening range to the number threshold N0 is not greater than the preset first ratio B1, and the statistics are in If the ratio of the number N12 of throttle opening values within the preset second throttle opening range to the preset number threshold N0 is not greater than the preset second ratio B2, then the stored throttle opening value data will be Empty, and start storing and counting again.

For the aforementioned method embodiments, for the sake of simple description, they are expressed as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, Certain steps may be performed in other orders or simultaneously.

The following are device embodiments of the present invention, which can be used to implement the method embodiments of the present invention. For the details not disclosed in the device embodiment of the present invention, please refer to the method embodiment of the present invention.

Embodiment Three

This embodiment provides a control device for a shift strategy of an AMT. Referring to FIG. The third judging unit 15 and the second shift strategy updating unit 16 .

The data collection and storage unit 11 is used to start reading and storing the throttle opening value every preset time when the engine is on and the throttle opening is greater than zero;

The first judging unit 12 is used to judge whether the number of stored accelerator opening values is equal to the preset number threshold, and if so, execute the second judging unit 13;

The second judging unit 13 is used to count whether the ratio of the number of accelerator opening values within the preset first throttle opening range to the number threshold is greater than the preset first ratio, and if so, execute the first A shift strategy updating unit 14, if not, then execute the third judging unit 15;

The first shift strategy updating unit 14 is used to reduce the gear and downshift the vehicle speed;

The third judging unit 15 is used to count whether the ratio of the number of throttle opening values within the preset second throttle opening range to the number threshold is greater than the preset second ratio, and if so, execute the first Second, a shift strategy updating unit 16;

The second shift strategy updating unit 16 is configured to increase the vehicle speed for gear upshifts, and the maximum value of the second accelerator opening range is smaller than the minimum value of the first accelerator opening range.

The control device for the gear shift strategy of the AMT provided in this embodiment stores the data of the throttle opening, and analyzes the vehicle running state through the proportion of the throttle opening, and then updates the existing gear shift strategy according to the actual vehicle usage, so that The engine works in a reasonable range, which fully meets the actual driving conditions of the vehicle and the power demand of the driver.

Embodiment four

This embodiment provides another control device for the shift strategy of AMT, referring to Fig. 5, the device includes: a data acquisition and storage unit 11, a first judgment unit 12, a second judgment unit 13, and a unit for executing the first shift strategy update 14. A third judging unit 15 , a second shift strategy updating unit 16 and a fourth judging unit 17 .

The fourth judging unit 17 is used to count whether the ratio of the number of accelerator opening values within the preset third opening range to the number threshold is greater than the preset third before executing the second judging unit 13. Three ratios, if yes, execute the second judgment order 13, the maximum value of the third opening range is smaller than the minimum value of the first accelerator opening range, and the minimum value of the third opening range is greater than the specified The maximum value of the second accelerator opening range mentioned above.

Specifically, the first throttle opening range may be 80%-100%, the second throttle opening range may be 0%-40%, and the third throttle opening range may be 40%-80%. The third throttle opening range is the normal throttle opening range. If the statistical result is that the throttle opening value is mainly in the normal throttle opening range, that is, neither the large throttle opening nor the small throttle opening, no strategy change is required. .

Preferably, the first shift strategy updating unit 14 is specifically used for:

The new downshift strategy is calculated by the first formula and replaces the original downshift strategy, and the first formula is:

Wherein, V2 is the new downshift vehicle speed, V1 is the original downshift vehicle speed, V9 is the highest shift vehicle speed, B3 is the third ratio, P2 is the number of throttle opening values in the third opening range and the above-mentioned The ratio of the number threshold.

Preferably, the second shift strategy updating unit 16 is specifically used for:

The new upshift strategy is calculated by the second formula and replaces the original upshift strategy, and the second formula is:

Wherein, V4 is the new upshift vehicle speed, V3 is the original upshift vehicle speed, V0 is the minimum shift speed, B3 is the third ratio, P2 is the number of throttle opening values in the third opening range and the above-mentioned The ratio of the number threshold.

The device embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in One place, or it can be distributed to multiple network elements. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. It can be understood and implemented by those skilled in the art without creative effort.

In this document, relational terms such as first and second etc. are used only to distinguish one entity or operation from another without necessarily requiring or implying any such relationship between these entities or operations. Actual relationship or sequence. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments of the present invention enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. The control method of the shift strategy of a kind of AMT is characterized in that, comprises: When the engine is on and the throttle opening is greater than zero, start to read and store the throttle opening every preset time; judging whether the number of stored accelerator opening values is equal to a preset number threshold; If the number of the stored throttle opening values is equal to the preset number threshold, it is counted whether the ratio of the number of throttle opening values within the preset first throttle opening range to the number threshold is greater than the preset Set the first ratio, if yes, reduce the gear and downshift the vehicle speed, if not, count whether the ratio of the number of throttle opening values within the preset second throttle opening range to the number threshold is greater than the preset second ratio; If the ratio of the number of accelerator opening values in the preset second throttle opening range to the number threshold is greater than the preset second ratio, then increase the gear and upshift the vehicle speed, and the second throttle opening range The maximum value is smaller than the minimum value of the first throttle opening range. 2. The method according to claim 1, characterized in that, whether the ratio of the number of throttle opening values within the preset first throttle opening range to the number threshold is greater than the preset first Before a ratio step, also include: Count whether the ratio of the number of accelerator opening values within the preset third opening range to the number threshold is greater than the preset third ratio, and if so, perform the statistics in the preset first throttle opening range the step of whether the ratio of the number of throttle opening values in the range to the number threshold is greater than a preset first ratio, the maximum value of the third opening range is smaller than the minimum value of the first throttle opening range, The minimum value of the third opening range is greater than the maximum value of the second throttle opening range. 3. The method according to claim 2, wherein said downshifting downshifting the vehicle speed specifically comprises: The new downshift strategy is calculated by the first formula and replaces the original downshift strategy, and the first formula is: <mrow><mi>V</mi><mn>2</mn><mo>=</mo><mi>V</mi><mn>1</mn><mo>+</mo><mfrac><mrow><mi>B</mi><mn>3</mn><mo>-</mo><mi>P</mi><mn>2</mn></mrow><mrow><mi>B</mi><mn>3</mn></mrow></mfrac><mo>*</mo><mrow><mo>(</mo><mi>V</mi><mn>9</mn><mo>-</mo><mi>V</mi><mn>1</mn><mo>)</mo></mrow></mrow> Wherein, V2 is the new downshift vehicle speed, V1 is the original downshift vehicle speed, V9 is the highest shift vehicle speed, B3 is the third ratio, P2 is the number of throttle opening values in the third opening range and the above-mentioned The ratio of the number threshold. 4. The method according to claim 2, characterized in that said increasing the gear and upshifting the vehicle speed specifically comprises: The new upshift strategy is calculated by the second formula and replaces the original upshift strategy, and the second formula is: <mrow><mi>V</mi><mn>4</mn><mo>=</mo><mi>V</mi><mn>3</mn><mo>-</mo><mfrac><mrow><mi>B</mi><mn>3</mn><mo>-</mo><mi>P</mi><mn>2</mn></mrow><mrow><mi>B</mi><mn>3</mn></mrow></mfrac><mo>*</mo><mrow><mo>(</mo><mi>V</mi><mn>3</mn><mo>-</mo><mi>V</mi><mn>0</mn><mo>)</mo></mrow></mrow> Wherein, V4 is the new upshift vehicle speed, V3 is the original upshift vehicle speed, V0 is the minimum shift speed, B3 is the third ratio, P2 is the number of throttle opening values in the third opening range and the above-mentioned The ratio of the number threshold. 5. A control device for a shift strategy of an AMT, characterized in that it comprises: The data acquisition and storage unit is used to read and store the throttle opening value every preset time when the engine is on and the throttle opening is greater than zero; The first judging unit is used to judge whether the number of stored accelerator opening values is equal to the preset number threshold, and if so, execute the second judging unit; The second judging unit is used to count whether the ratio of the number of throttle opening values within the preset first throttle opening range to the number threshold is greater than the preset first ratio, and if so, execute the first The shift strategy update unit, if not, execute the third judging unit; The first shift strategy update unit is used to reduce the gear position and downshift the vehicle speed; The third judging unit is used to count whether the ratio of the number of throttle opening values within the preset second throttle opening range to the number threshold is greater than the preset second ratio, and if so, execute the second Shift strategy updating unit; The second gear shift strategy update unit is used to increase the vehicle speed for upshifting gears, and the maximum value of the second throttle opening range is smaller than the minimum value of the first throttle opening range. 6. The device according to claim 5, further comprising: The fourth judging unit is used to count whether the ratio of the number of accelerator opening values within the preset third opening range to the number threshold is greater than the preset third ratio before executing the second judging unit, If yes, execute the second judging unit, the maximum value of the third opening range is smaller than the minimum value of the first accelerator opening range, and the minimum value of the third opening range is greater than the second throttle opening range The maximum value of the opening range. 7. The device according to claim 6, wherein the first shift strategy update unit is specifically configured to: The new downshift strategy is calculated by the first formula and replaces the original downshift strategy, and the first formula is: <mrow><mi>V</mi><mn>2</mn><mo>=</mo><mi>V</mi><mn>1</mn><mo>+</mo><mfrac><mrow><mi>B</mi><mn>3</mn><mo>-</mo><mi>P</mi><mn>2</mn></mrow><mrow><mi>B</mi><mn>3</mn></mrow></mfrac><mo>*</mo><mrow><mo>(</mo><mi>V</mi><mn>9</mn><mo>-</mo><mi>V</mi><mn>1</mn><mo>)</mo></mrow></mrow> Wherein, V2 is the new downshift vehicle speed, V1 is the original downshift vehicle speed, V9 is the highest shift vehicle speed, B3 is the third ratio, P2 is the number of throttle opening values in the third opening range and the above-mentioned The ratio of the number threshold. 8. The device according to claim 6, wherein the second shift strategy updating unit is specifically configured to: The new upshift strategy is calculated by the second formula and replaces the original upshift strategy, and the second formula is: <mrow><mi>V</mi><mn>4</mn><mo>=</mo><mi>V</mi><mn>3</mn><mo>-</mo><mfrac><mrow><mi>B</mi><mn>3</mn><mo>-</mo><mi>P</mi><mn>2</mn></mrow><mrow><mi>B</mi><mn>3</mn></mrow></mfrac><mo>*</mo><mrow><mo>(</mo><mi>V</mi><mn>3</mn><mo>-</mo><mi>V</mi><mn>0</mn><mo>)</mo></mrow></mrow> Wherein, V4 is the new upshift vehicle speed, V3 is the original upshift vehicle speed, V0 is the minimum shift speed, B3 is the third ratio, P2 is the number of throttle opening values in the third opening range and the above-mentioned The ratio of the number threshold.