A vehicle gear shifting control method and device, electronic equipment and storage medium

Abstract

The application provides a vehicle gear shifting control method and device, electronic equipment and storage medium. The vehicle adopts an AMT transmission. When the engine speed and the transmission input shaft speed are synchronized at a vehicle starting stage, the accelerator pedal opening degree is obtained. The target position of quick engagement of the clutch is determined according to the accelerator pedal opening degree. The clutch is controlled to quickly engage to the target position. When the vehicle accelerates to the upshift, the clutch is controlled to perform from the target position to the disengagement position. After the gear shifting is completed, the clutch is controlled to perform from the disengagement position to the fully engaged position. Compared with the prior art, in the application, the clutch is not fully engaged at the starting stage, the clutch can be quickly disengaged in the next gear shifting process, the gear shifting time is effectively shortened, and the reliability and power of the AMT vehicle are greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle control, in particular to a vehicle gear shifting control method and device, an electronic device and a storage medium. BACKGROUND

[0002] In recent years, the mechanical automatic transmission (AMT) has seen explosive growth in the domestic commercial vehicle market, as it does not require driver operation, greatly reducing labor intensity and improving vehicle fuel economy, so commercial vehicles matching AMT have great development prospects.

[0003] Especially when the vehicle starts and shifts at low speed, the power requirement is relatively high. During the starting process, the clutch is engaged in a "fast-slow-fast" mode. First, the clutch is quickly engaged to the vicinity of the slip point, then slowly engaged, and when the engine speed and transmission input shaft speed are synchronized, the clutch is finally fast engaged. Finally, the clutch is fully engaged, and when the vehicle accelerates to the first shift, the clutch is separated from full engagement, and then fully engaged after shifting. Because the clutch is fully engaged after starting, it will cause the clutch to separate for a longer time when shifting, resulting in an increase in shift time and affecting vehicle power. SUMMARY

[0004] The purpose of the present application is to provide a vehicle gear shifting control method, device, electronic device and storage medium to shorten the vehicle gear shifting time.

[0005] In a first aspect, the embodiments of the present application provide a vehicle gear shifting control method, wherein the vehicle uses an AMT transmission, and the method comprises:

[0006] When the engine speed and the transmission input shaft speed are synchronized, the accelerator pedal opening degree is obtained;

[0007] The target position of the clutch fast engagement is determined according to the accelerator pedal opening degree;

[0008] The clutch is controlled to fast engage to the target position, and when the vehicle accelerates to shift, the clutch is controlled to execute from the target position to the separation position, and then from the separation position to the full engagement position after shifting is completed.

[0009] In one possible implementation, the target position of the clutch fast engagement is determined according to the accelerator pedal opening degree, comprising

[0010] Based on the torque corresponding relationship chart of the accelerator pedal, the target torque corresponding to the accelerator pedal opening degree is obtained;

[0011] According to a torque transmission characteristic curve of the clutch, a target position of fast engagement of the clutch corresponding to the target torque is obtained.

[0012] In a possible implementation, the control of the fast engagement of the clutch to the target position comprises:

[0013] controlling the fast engagement of the clutch to the target position;

[0014] According to actual position information of the clutch fed back by a position sensor, it is determined whether the clutch is fast engaged to the target position.

[0015] In a possible implementation, before the obtaining of the accelerator pedal opening, the method further comprises:

[0016] determining that the vehicle is in a starting working condition.

[0017] In a second aspect, an embodiment of the present application provides a vehicle gear shifting control device, the vehicle using an AMT transmission, and the device comprising:

[0018] an obtaining module, configured to obtain an accelerator pedal opening when an engine speed and a transmission input shaft speed are synchronized;

[0019] a determining module, configured to determine a target position of fast engagement of a clutch according to the accelerator pedal opening;

[0020] a control module, configured to control the fast engagement of the clutch to the target position, and control the clutch to perform from the target position to a disengagement position when the vehicle accelerates to a gear upshift, and control the clutch to perform from the disengagement position to a full engagement position after the gear upshift is completed.

[0021] In a possible implementation, the determining module is specifically configured to:

[0022] obtain a target torque corresponding to the accelerator pedal opening based on a torque corresponding relationship diagram of the accelerator pedal;

[0023] obtain a target position of fast engagement of the clutch corresponding to the target torque based on a torque transmission characteristic curve of the clutch.

[0024] In a possible implementation, the control module is specifically configured to:

[0025] control the fast engagement of the clutch to the target position;

[0026] determine whether the clutch is fast engaged to the target position according to actual position information of the clutch fed back by a position sensor.

[0027] In a possible implementation, the obtaining module is further configured to:

[0028] Before the accelerator pedal opening degree is acquired, it is determined that the vehicle is in a starting working condition.

[0029] In a third aspect, an electronic device is provided, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the method in the first aspect when executing the computer program.

[0030] In a fourth aspect, a computer readable storage medium is provided, which stores computer readable instructions executable by a processor to implement the method in the first aspect.

[0031] The vehicle gear shift control method, device, electronic device, and storage medium provided by the present application are used for an AMT transmission, and when the engine speed and the transmission input shaft speed are synchronized during the vehicle starting stage, the accelerator pedal opening degree is acquired; the target position of the clutch fast engagement is determined according to the accelerator pedal opening degree; the clutch is controlled to fast engage to the target position, and when the vehicle accelerates to the upshift, the clutch is controlled to perform from the target position to the disengagement position, and after the gear shift is completed, the clutch is controlled to perform from the disengagement position to the fully engaged position. Compared with the prior art, in the present application, the clutch is not fully engaged during the starting stage, and the clutch can be quickly disengaged during the next gear shift process, so that the gear shift time is effectively shortened, and the reliability and power of the AMT vehicle are greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0032] 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 accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the scope of the present application. Moreover, the same reference numerals are used throughout the same figures. In the drawings:

[0033] Figure 1 An existing AMT vehicle starting and gear shift process schematic diagram is shown;

[0034] Figure 2 A flowchart of a vehicle gear shift control method provided by the present application is shown;

[0035] Figure 3 A schematic diagram of a clutch torque transmission characteristic curve provided by the present application is shown;

[0036] Figure 4 An AMT vehicle starting and gear shift process schematic diagram provided by the present application is shown;

[0037] Figure 5 A schematic diagram of a vehicle gear shift control device provided by the present application is shown. DETAILED DESCRIPTION

[0038] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms and should not be limited by 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 present disclosure to those skilled in the art.

[0039] It should be noted that the technical or scientific terms used in the present application should be understood as the general meaning understood by those skilled in the art unless otherwise specified.

[0040] In addition, the terms "first" and "second" and the like are used to distinguish different objects, rather than to describe a particular order. Furthermore, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus including a series of steps or units is not limited to the listed steps or units, but can optionally include other steps or units not listed or can optionally include other steps or units inherent to such processes, methods, products, or apparatus.

[0041] The related terms of the present application are explained as follows:

[0042] AMT transmission: The mechanical automatic transmission is an automatic transmission system composed of a traditional dry friction clutch and a manual transmission, plus an electronic control unit (TCU) and a selection and shift, clutch actuator, wherein automatic selection and shift are realized by a selection and shift actuator, and automatic engagement and disengagement of the clutch is realized by a clutch actuator;

[0043] TCU: Transmission control unit;

[0044] Clutch torque transmission characteristic curve: The relationship between the engagement position of the clutch and the torque value of the clutch at different engagement positions during engagement is the torque transmission characteristic curve.

[0045] AMT vehicles (vehicles using AMT transmissions) have relatively high requirements for power during low-speed starting and shifting. In general, the clutch engagement of a typical AMT vehicle during the driver's starting process is "fast-slow-fast". Referring to Figure 1 , the clutch is first engaged quickly from the disengaged state to the slip point A, then slowly engaged, and when the engine speed and transmission input shaft speed are synchronized to B, the clutch is finally engaged quickly, and finally the clutch is fully engaged (the position percentage of the clutch is 0%). When the vehicle accelerates to the first shift, the clutch is disengaged from the fully engaged point C, and then fully engaged after shifting.

[0046] Since the clutch is fully engaged after the start-up is completed, it will result in a longer clutch disengagement time when the next gear is shifted, thus resulting in an increase in the gear shifting time.

[0047] Therefore, embodiments of the present application provide a vehicle gear shifting control method and device, an electronic device, and a computer readable storage medium, which are described below with reference to the accompanying drawings.

[0048] Please refer to Figure 2 which shows a flowchart of a vehicle gear shifting control method provided by the present application, and the vehicle uses an AMT transmission. As shown in Figure 2 the vehicle gear shifting control method can include the following steps:

[0049] S101, obtaining the accelerator pedal opening degree when the engine speed and the transmission input shaft speed are synchronized;

[0050] Specifically, before obtaining the accelerator pedal opening degree in step S101, the method can further include determining that the vehicle is in a start-up working condition.

[0051] Specifically, step S101 can be: obtaining the accelerator pedal opening degree when the engine speed and the transmission input shaft speed are synchronized, under the condition that the vehicle is in a start-up working condition. The accelerator pedal opening degree refers to the degree to which the accelerator pedal is depressed.

[0052] S102, determining the target position of the clutch fast engagement according to the accelerator pedal opening degree;

[0053] Specifically, step S102 can be implemented as: obtaining the target torque corresponding to the accelerator pedal opening degree based on the torque corresponding relationship chart of the accelerator pedal; and obtaining the target position of the clutch fast engagement corresponding to the target torque based on the torque transmission characteristic curve of the clutch.

[0054] The target torque required by the engine is from the torque corresponding relationship chart (map) of the accelerator pedal. Usually, in the vehicle control system, there is a corresponding relationship data chart or table between the accelerator pedal position and the engine output torque, which is called "map". When the driver depresses the accelerator pedal, the system will determine the engine output torque value according to the degree to which the pedal is depressed through this map. In this way, the power output of the engine can be accurately controlled according to the operation intention of the driver to meet different driving requirements, such as acceleration, constant speed driving, etc. For example, when the accelerator pedal is depressed deeply, the target torque corresponding to the map can be larger to provide stronger power; and when the pedal is depressed shallowly, the target torque is correspondingly smaller.

[0055] The torque transmission characteristic curve of the clutch is as shown in Figure 3As shown, when the clutch is slowly engaged to the vicinity of the slip point D, the torque transmitted by the clutch starts to increase from 0, and the torque transmitted by the clutch gradually increases with the increase of the clutch engagement position percentage, and when the clutch is engaged to a certain position percentage E, the torque transmitted by the clutch is equal to the maximum output torque of the engine.

[0056] Please refer to Figure 4 As shown in the AMT vehicle starting and shifting process diagram of the present application, after the engine speed and the transmission input shaft speed are synchronized at B, the clutch is quickly engaged, and meanwhile the engine torque is increased, the target torque of the engine torque increase is obtained from the accelerator pedal map, and the target position percentage of the clutch quick engagement is obtained based on the clutch torque transmission characteristic curve, the torque transmitted by the clutch should be equal to the target torque of the engine torque increase, so the clutch does not need to be fully engaged, and therefore the clutch can be quickly separated in the next gear shifting, which can effectively shorten the gear shifting time.

[0057] S103, control the clutch to quickly engage to the target position, and when the vehicle accelerates to the upshift, control the clutch to execute from the target position to the separation position, and then execute from the separation position to the fully engaged position after the gear shifting is completed.

[0058] In the present application, after the starting speed is synchronized, the clutch is quickly engaged based on the torque transmission characteristic curve, without the need of full engagement, and in the next gear shifting process, the clutch can be quickly separated, which effectively shortens the gear shifting time and improves the power performance of the AMT vehicle at low speed.

[0059] The vehicle gear shifting control method provided by the embodiment of the present application is used for the vehicle with the AMT transmission, when the engine speed and the transmission input shaft speed are synchronized at the vehicle starting stage, the accelerator pedal opening degree is obtained; the target position of the clutch quick engagement is determined according to the accelerator pedal opening degree; the clutch is controlled to quickly engage to the target position, and when the vehicle accelerates to the upshift, the clutch is controlled to execute from the target position to the separation position, and then execute from the separation position to the fully engaged position after the gear shifting is completed. Compared with the prior art, in the present application, the clutch is not fully engaged at the starting stage, and in the next gear shifting process, the clutch can be quickly separated, which effectively shortens the gear shifting time and greatly improves the reliability and power performance of the AMT vehicle.

[0060] In the above embodiment, a vehicle gear shifting control method is provided, and the present application further provides a vehicle gear shifting control device, which can be realized by software, hardware or a combination of software and hardware. For example, the vehicle gear shifting control device can include integrated or separated functional modules or units to execute the corresponding steps in the above methods. Please refer to Figure 4Fig. 1 shows a schematic diagram of a vehicle shift control device according to some embodiments of the present application. Since the device embodiments are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the part of the description of the method embodiments. The device embodiments described below are only illustrative.

[0061] As shown in Fig. 1, the vehicle shift control device 10 can include: Figure 5 An obtaining module 101 is configured to obtain an accelerator pedal opening degree when the engine speed and the transmission input shaft speed are synchronized.

[0062] A determining module 102 is configured to determine a target position of clutch fast engagement according to the accelerator pedal opening degree.

[0063] A control module 103 is configured to control the clutch to fast engage to the target position, and when the vehicle accelerates to upshift, control the clutch to perform from the target position to a disengagement position, and then perform from the disengagement position to a fully engaged position after the gear shifting is completed.

[0064] In a possible implementation, the determining module 102 is specifically configured to:

[0065] obtain a target torque corresponding to the accelerator pedal opening degree based on a torque corresponding relationship chart of the accelerator pedal;

[0066] obtain the target position of clutch fast engagement corresponding to the target torque based on a torque transmission characteristic curve of the clutch.

[0067] In a possible implementation, the control module 103 is specifically configured to:

[0068] control the clutch to fast engage to the target position;

[0069] determine whether the clutch fast engages to the target position according to actual position information of the clutch fed back by a position sensor.

[0070] In a possible implementation, the obtaining module 101 is further configured to:

[0071] determine that the vehicle is in a starting working condition before obtaining the accelerator pedal opening degree.

[0072] The vehicle shift control device provided by the embodiments of the present application can make the clutch quickly disengage in the next gear shifting process when the clutch is not fully engaged in the starting stage, effectively shorten the gear shifting time, and greatly improve the reliability and power performance of the AMT vehicle.

[0073]

[0074] ​The embodiments of the present application further provide an electronic device corresponding to the vehicle gear shifting control method provided by the preceding embodiments, which can be a gearbox electronic control unit, a mobile phone, a notebook computer, a tablet computer, a desktop computer, etc., to execute the vehicle gear shifting control method.

[0075] The electronic device provided by the embodiments of the present application and the vehicle gear shifting control method provided by the embodiments of the present application are based on the same inventive concept, and have the same beneficial effects as the method adopted, run or implemented by the electronic device.

[0076] The embodiments of the present application further provide a computer readable storage medium corresponding to the vehicle gear shifting control method provided by the preceding embodiments, which stores a computer program (i.e. program product), and the computer program, when run by a processor, will execute the vehicle gear shifting control method provided by any of the preceding embodiments.

[0077] It should be noted that examples of the computer readable storage medium can further include, but are not limited to, a phase change memory (PRAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), other types of random access memory (RAM), a read only memory (ROM), an electrically erasable programmable read only memory (EEPROM), a flash memory or other optical, magnetic storage medium, which will not be described one by one here.

[0078] The computer readable storage medium provided by the above embodiments of the present application and the vehicle gear shifting control method provided by the embodiments of the present application are based on the same inventive concept, and have the same beneficial effects as the method adopted, run or implemented by the application program stored in the computer readable storage medium.

[0079] It should be noted that the flowcharts and block diagrams in the drawings show the possible implementation architecture, function and operation of the system, method and computer program product according to the embodiments of the present application. In this regard, each block in the flowcharts or block diagrams can represent a module, a program segment or a part of code containing one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions noted in the blocks can occur in different order from that shown in the drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and sometimes they can be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and the combination of blocks in the block diagrams and / or flowcharts, can be implemented by a dedicated hardware-based system that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application.

Claims

1. A vehicle shift control method characterized by, The vehicle adopts an AMT transmission, and the method comprises: When the engine speed and the transmission input shaft speed are synchronized, the accelerator pedal opening degree is acquired; The target position of the clutch quick engagement is determined according to the accelerator pedal opening degree; The clutch is controlled to quickly engage to the target position, and when the vehicle accelerates to the upshift, the clutch is controlled to execute from the target position to the disengagement position, and after the gear shifting is completed, the clutch is controlled to execute from the disengagement position to the fully engaged position.

2. The vehicle shift control method according to claim 1, characterized by, The target position of the clutch quick engagement is determined according to the accelerator pedal opening degree, which comprises The target torque corresponding to the accelerator pedal opening degree is acquired based on a torque corresponding relation chart of the accelerator pedal; The target position of the clutch quick engagement corresponding to the target torque is acquired based on a torque transmission characteristic curve of the clutch.

3. The vehicle shift control method according to claim 1, characterized by, The clutch is controlled to quickly engage to the target position, which comprises The clutch is controlled to quickly engage to the target position; Whether the clutch quickly engages to the target position is judged according to the actual position information of the clutch fed back by a position sensor.

4. The vehicle shift control method according to claim 1, characterized by, Before the accelerator pedal opening degree is acquired, the method further comprises: It is determined that the vehicle is in a starting working condition.

5. A vehicle shift control device characterized by comprising: The vehicle adopts an AMT transmission, and the device comprises: An acquisition module is configured to acquire the accelerator pedal opening degree when the engine speed and the transmission input shaft speed are synchronized; A determination module is configured to determine the target position of the clutch quick engagement according to the accelerator pedal opening degree; A control module is configured to control the clutch to quickly engage to the target position, and when the vehicle accelerates to the upshift, the clutch is controlled to execute from the target position to the disengagement position, and after the gear shifting is completed, the clutch is controlled to execute from the disengagement position to the fully engaged position.

6. The vehicle shift control device according to claim 5, characterized by The determination module is specifically configured to: The target torque corresponding to the accelerator pedal opening degree is acquired based on a torque corresponding relation chart of the accelerator pedal; The target position of the clutch quick engagement corresponding to the target torque is acquired based on a torque transmission characteristic curve of the clutch.

7. The vehicle shift control device according to claim 5, characterized by The control module is specifically configured to: The clutch is controlled to quickly engage to the target position; Whether the clutch quickly engages to the target position is judged according to the actual position information of the clutch fed back by a position sensor.

8. The vehicle shift control device according to claim 5, characterized by The acquisition module is further configured to: Before the accelerator pedal opening degree is acquired, it is determined that the vehicle is in a starting working condition.

9. An electronic device comprising: A memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the method in any one of claims 1 to 4 when the computer program is executed.

10. A computer-readable storage medium, characterized in that, A computer readable instruction is stored thereon, and the computer readable instruction can be executed by a processor to implement the method in any one of claims 1 to 4.

Images