Gearbox input shaft torque calibration method, device and vehicle

Abstract

The disclosed embodiments relate to a method, apparatus, and vehicle for calibrating transmission input shaft torque. The method includes: upon engine startup in a vehicle, determining the vehicle's current control gear and the initial transmission input shaft torque corresponding to the current control gear; determining whether the current control gear is a preset gear, wherein the initial transmission input shaft torque corresponding to the preset gear is 0; if the current control gear is not a preset gear, determining a target torque error value corresponding to the vehicle; and calibrating the initial transmission input shaft torque corresponding to the current control gear based on the target torque error value. This technical solution reduces the calibration cost of the transmission input shaft torque while ensuring the accuracy of the transmission input shaft torque in controlling gear shifts, thereby improving driving comfort.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle control technology, and in particular to a method and device for calibrating the torque of a transmission input shaft, and a vehicle. Background Art

[0002] With the development of the economy and the advancement of manufacturing technology, it is becoming more and more common to change vehicles equipped with manual transmissions to vehicles equipped with automatic transmissions. For example, light trucks equipped with automatic transmissions can provide better driving comfort. Therefore, light truck manufacturers are more likely to choose to change manual transmissions to automatic transmissions based on existing models and then pursue rapid market sales.

[0003] In related technologies, after a vehicle equipped with a manual transmission is changed to one equipped with an automatic transmission, the vehicle is directly put into use because the cost of calibrating the input shaft torque of the automatic transmission is high. However, the automatic transmission relies heavily on the high-precision input shaft torque of the automatic transmission for corresponding control. Without calibration, the input shaft torque accuracy of the automatic transmission during gear shifting is poor, affecting driving comfort. Summary of the Invention

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a method, device and vehicle for calibrating the input shaft torque of a transmission.

[0005] An embodiment of the present disclosure provides a method for calibrating a transmission input shaft torque, the method comprising: when an engine in a vehicle is started, determining a current control gear of the vehicle and an initial transmission input shaft torque corresponding to the current control gear; determining whether the current control gear is a preset gear, wherein the initial transmission input shaft torque corresponding to the preset gear is 0; when the current control gear is not the preset gear, determining a target torque error value corresponding to the vehicle; and calibrating the initial transmission input shaft torque corresponding to the current control gear according to the target torque error value.

[0006] An embodiment of the present disclosure also provides a calibration device for a transmission input shaft torque, the device comprising: a first determination module, for determining a current control gear of the vehicle and an initial transmission input shaft torque corresponding to the current control gear when an engine in the vehicle is started; a second determination module, for determining whether the current control gear is a preset gear, wherein the initial transmission input shaft torque corresponding to the preset gear is 0; a third determination module, for determining a target torque error value corresponding to the vehicle when the current control gear is not the preset gear; and a calibration module, for calibrating the initial transmission input shaft torque corresponding to the current control gear according to the target torque error value.

[0007] An embodiment of the present disclosure also provides a vehicle, comprising: a processor; a memory for storing executable instructions of the processor; the processor for reading the executable instructions from the memory and executing the instructions to implement the calibration method of the transmission input shaft torque provided in the embodiment of the present disclosure.

[0008] An embodiment of the present disclosure further provides a computer-readable storage medium, wherein the storage medium stores a computer program, and the computer program is used to execute the calibration method of the transmission input shaft torque provided by the embodiment of the present disclosure.

[0009] The technical solution provided by the embodiments of the present disclosure has the following advantages over the prior art:

[0010] The disclosed embodiments provide a transmission input shaft torque calibration scheme. Upon engine startup in a vehicle, the scheme determines the vehicle's current control gear and the initial transmission input shaft torque corresponding to the current control gear. It then determines whether the current control gear is a preset gear, where the initial transmission input shaft torque corresponding to the preset gear is zero. Furthermore, if the current control gear is not a preset gear, a target torque error value corresponding to the vehicle is determined. The initial transmission input shaft torque corresponding to the current control gear is calibrated based on the target torque error value. This technical solution reduces the calibration cost of the transmission input shaft torque while ensuring the accuracy of the shift control based on the transmission input shaft torque, thereby improving driving comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The above and other features, advantages, and aspects of the various embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the originals and elements are not necessarily drawn to scale.

[0012] Figure 1 A schematic flow chart of a method for calibrating the torque of a transmission input shaft provided by an embodiment of the present disclosure;

[0013] Figure 2 A schematic structural diagram of a gearbox input shaft torque calibration device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0014] The following describes embodiments of the present disclosure in more detail with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of protection of the present disclosure.

[0015] It should be understood that the various steps described in the method embodiments of the present disclosure may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present disclosure is not limited in this respect.

[0016] As used herein, the term "including" and its variations are open-ended, i.e., "including but not limited to." The term "based on" means "based, at least in part, on." The term "one embodiment" means "at least one embodiment," the term "another embodiment" means "at least one additional embodiment," and the term "some embodiments" means "at least some embodiments." Other terms are defined in the following description.

[0017] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0018] It should be noted that the modifications of "one" and "multiple" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, they should be understood as "one or more".

[0019] The names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only used for illustrative purposes and are not used to limit the scope of these messages or information.

[0020] Based on the above description, current automatic transmission control relies heavily on high-precision torque values sent by the engine for appropriate control. When a vehicle is equipped with an automatic transmission, while engine manufacturers can be required to optimize torque accuracy at room temperature during the development cycle, they lack the time and resources to optimize engine torque accuracy under high-altitude and cold conditions. This can lead to unpredictable deviations in engine torque accuracy at different temperatures and altitudes. Automatic transmissions precisely control input shaft torque based on engine torque to meet comfort requirements. When engine torque is greater than the actual value, the control oil pressure during shifting can be excessive, resulting in overly rapid speed regulation and poor shift quality, impacting vehicle comfort. When engine torque is less than the actual value, the control oil pressure during non-shifting can be too low, causing clutch slippage and damage to friction plates. Severe damage to friction plates can lead to transmission failure. Furthermore, low control oil pressure during shifting can cause runaway, which not only reduces driver comfort but can also damage friction plates and cause transmission failure. Errors in engine torque are reflected in the transmission input shaft torque, making input shaft torque calibration necessary.

[0021] In order to solve the above problems, an embodiment of the present disclosure provides a method for calibrating the torque of a transmission input shaft, which is described below in conjunction with specific embodiments.

[0022] Figure 1 This is a flow chart of a method for calibrating the transmission input shaft torque provided by an embodiment of the present disclosure. This method can be performed by a calibration device for the transmission input shaft torque, wherein the device can be implemented using software and / or hardware and can generally be integrated into a vehicle. Figure 1 As shown, the method includes:

[0023] Step 101 : When the engine in a vehicle is started, determine the current control gear of the vehicle and the initial transmission input shaft torque corresponding to the current control gear.

[0024] In the embodiment of the present disclosure, the vehicle can be any driving vehicle put into production. In the embodiment of the present disclosure, the calibration of the transmission input shaft torque is performed at the granularity of a single vehicle, taking into account the individual differences between vehicles, thereby improving the calibration accuracy and availability of the input shaft torque.

[0025] In an embodiment of the present disclosure, when the engine in a vehicle is started, the current control gear of the vehicle and the initial transmission input shaft torque corresponding to the current control gear are determined, wherein the initial transmission input shaft torque can be understood as the theoretical torque value of the torque output by the engine transmitted to the automatic transmission input shaft through the clutch or torque converter. This theoretical torque value is the theoretical torque value transmitted to the automatic transmission by the vehicle CAN bus after controlling the engine in order to control the vehicle in the current control gear.

[0026] Step 102 : Determine whether the current control gear is a preset gear, wherein the initial transmission input shaft torque corresponding to the preset gear is 0.

[0027] The initial transmission input shaft torque corresponding to the preset gear is 0, that is, the theoretical value of the initial transmission input shaft torque corresponding to the preset gear should be 0, wherein the preset gear may include P gear, N gear, etc.

[0028] Step 103 : When the current control gear is not a preset gear, determine a target torque error value corresponding to the vehicle.

[0029] In one embodiment of the present disclosure, when the current controlled gear is not a preset gear, a target torque error value corresponding to the vehicle is determined.

[0030] In different application scenarios, the method for determining the target torque error value corresponding to the vehicle is different, as shown in the following examples:

[0031] In some possible embodiments, when the current control gear is a preset gear, the actual transmission input shaft torque corresponding to the current control gear is obtained. It is understood that there may be an error between the initial transmission input shaft torque and the actual transmission input shaft torque. For example, a torque converter can amplify torque in certain situations (especially during starting), but it also has certain efficiency losses. When the torque converter is unlocked, the internal fluid flow generates additional energy losses, which may cause an error between the initial transmission input shaft torque and the actual transmission input shaft torque. In other words, in the preset gear, the actual transmission input shaft torque may not be zero.

[0032] In this embodiment, the current driving environment parameters of the vehicle are obtained, wherein the current driving environment parameters may include one or more of the following: engine water temperature, altitude, ambient temperature, etc., wherein, since the theoretical transmission input shaft torque corresponding to the actual transmission input shaft torque is 0, the actual transmission input shaft torque minus 0 (the subtraction result is the actual transmission input shaft torque) is the torque error value under the current driving environment parameters. Therefore, in the embodiment of the present disclosure, a correspondence between the actual transmission input shaft torque and the current driving environment parameters of the vehicle is constructed and stored.

[0033] It should be understood that in the embodiments of the present disclosure, when the current control gear is the preset gear, that is, a correspondence between the actual transmission input shaft torque and the current driving environment parameters of the vehicle is established, and real-time maintenance and updating of the torque error value can be achieved. The torque error value obtained is based on the vehicle, and therefore, the accuracy of the torque error value is guaranteed, thereby improving the calibration accuracy of the transmission input shaft torque, and eliminating the need for manufacturers to drive the vehicle separately to different driving environment parameters during development, thereby reducing the calibration cost of the transmission input shaft torque.

[0034] Based on the above, it can be seen that in this embodiment, when the current control gear is not the preset gear, the current driving environment parameters of the vehicle can be obtained, and the pre-stored corresponding relationship can be queried based on the current driving environment parameters, and the target torque error value corresponding to the vehicle can be determined based on the query results.

[0035] In some possible embodiments, when the query result is that the pre-stored correspondence relationship includes a torque error value corresponding to the current driving environment parameter, the queried torque error value is determined to be the target torque error value.

[0036] In other possible embodiments, if the query result indicates that the pre-stored correspondence relationship does not include the torque error value corresponding to the current driving environment parameter, a reference driving environment parameter in the pre-stored correspondence relationship having the smallest environmental parameter difference with the current driving environment parameter is determined. In other words, the reference driving environment parameter in the pre-stored correspondence relationship that is closest to the current driving environment parameter is determined.

[0037] Among them, when the driving environment parameters include multiple types of driving environment parameters, the environmental parameter difference between the current driving environment parameters and each type of driving environment parameters in each driving environment parameter in the pre-stored corresponding relationship can be calculated respectively. After the environmental parameter difference corresponding to each type of driving environment parameter is normalized, the average of all normalized values is calculated as the environmental parameter difference between the current driving environment parameters and each driving environment parameter in the pre-stored corresponding relationship.

[0038] In this embodiment, after determining the reference driving environment parameters, the above-mentioned correspondence is queried to obtain the reference torque error value corresponding to the reference driving environment parameters, and the target torque error value is determined based on the reference torque error value and the difference between the environmental parameters of the current driving environment parameters and the reference driving environment parameters.

[0039] In different application scenarios, the target torque error value is determined in different ways according to the reference torque error value and the difference between the current driving environment parameter and the reference driving environment parameter. Examples are as follows:

[0040] In some possible examples, the ratio of the reference torque error value to the environmental parameter difference can be calculated, and the ratio represents the unit reference torque error value corresponding to the unit environmental parameter difference. The unit torque error value corresponding to the unit environmental parameter difference is determined according to a pre-stored correspondence relationship. For example, two sets of data are determined in the correspondence relationship: driving environment parameter value a1-torque error value b1; and driving environment parameter value a2-torque error value b2; then the unit torque error value corresponding to the unit environmental parameter difference is: (b2-b1) / (a2-a1). In this example, in order to ensure the reliability of the unit torque error value corresponding to the unit environmental parameter difference, the driving environment parameter values in the two sets of data for calculating the unit torque error value corresponding to the unit environmental parameter difference are the two sets of driving environment parameter values with the smallest environmental parameter difference with the current driving environment parameter value (that is, the environmental parameter difference between any one of the two sets of driving environment parameter values and the current driving environment parameter value is smaller than the environmental parameter difference between any other driving environment parameter value and the current driving environment parameter value in the corresponding relationship stored in this vehicle). Therefore, in this example, the product value of the environmental parameter difference and the unit torque error value corresponding to the unit environmental parameter difference can be calculated, and the reference torque error value and the product value are summed to determine the target torque error value.

[0041] In some possible embodiments, in order to improve calibration efficiency, the reference torque error value corresponding to the reference driving environment parameter may be directly used as the target torque error value.

[0042] In this embodiment, the mapping relationship is iteratively updated each time the vehicle reaches a preset gear, ensuring that the transmission uses accurate input shaft torque values for precise shift control. Furthermore, this method allows for timely and accurate calibration of the transmission input shaft torque even after engine performance deteriorates over vehicle mileage. This eliminates the need for engine testing in cold and high-altitude environments during new vehicle model development, reducing vehicle R&D costs and shortening development cycles.

[0043] In this embodiment, when the environmental parameter difference between the current driving environment parameter and the reference driving environment parameter is greater than the preset difference threshold, the target torque error value may not be determined in the above manner. Instead, it is determined whether other vehicles are included in the preset range of the vehicle. If other vehicles are included, the corresponding relationships stored in the other vehicles are obtained, and then other corresponding relationships are queried based on the current driving environment parameters. The target torque error value corresponding to the vehicle is determined based on the query results. The method for determining the target torque error value refers to the above embodiment and will not be repeated here.

[0044] Step 104 : Calibrate the initial transmission input shaft torque corresponding to the current control gear according to the target torque error value.

[0045] In an embodiment of the present disclosure, after determining the target torque error value, the initial transmission input shaft torque corresponding to the current control gear is calibrated according to the target torque error value. For example, the input shaft torque difference between the initial transmission input shaft torque corresponding to the current control gear and the target torque error value can be calculated, and the initial transmission input shaft torque can be calibrated to the input shaft torque difference.

[0046] In summary, the transmission input shaft torque calibration method of the disclosed embodiment, when the vehicle's engine is started, determines the vehicle's current control gear and the initial transmission input shaft torque corresponding to the current control gear. It also determines whether the current control gear is a preset gear, where the initial transmission input shaft torque corresponding to the preset gear is 0. Furthermore, if the current control gear is not a preset gear, a target torque error value corresponding to the vehicle is determined. The initial transmission input shaft torque corresponding to the current control gear is calibrated based on the target torque error value. This technical solution reduces the calibration cost of the transmission input shaft torque while ensuring the accuracy of the shift control based on the transmission input shaft torque, thereby improving driving comfort.

[0047] In order to implement the above embodiment, the present disclosure also proposes a calibration device for the transmission input shaft torque.

[0048] Figure 2 This is a schematic diagram of the structure of a gearbox input shaft torque calibration device provided by an embodiment of the present disclosure. The device can be implemented by software and / or hardware and can generally be integrated into a vehicle. Figure 2 As shown, the device includes: a first determination module 210, a second determination module 220, a third determination module 230, and a calibration module 240, wherein:

[0049] A first determining module 210 is configured to determine a current control gear of the vehicle and an initial transmission input shaft torque corresponding to the current control gear when the engine in the vehicle is started;

[0050] The second determining module 220 is configured to determine whether the current control gear is a preset gear, wherein the initial transmission input shaft torque corresponding to the preset gear is 0;

[0051] A third determining module 230 is configured to determine a target torque error value corresponding to the vehicle when the current control gear is not a preset gear;

[0052] The calibration module 240 is configured to calibrate the initial transmission input shaft torque corresponding to the current control gear according to the target torque error value.

[0053] In one embodiment of the present disclosure, the third determining module 230 is configured to:

[0054] Obtaining the current driving environment parameters of the vehicle, and querying the pre-stored corresponding relationship according to the current driving environment parameters;

[0055] The target torque error value corresponding to the vehicle is determined according to the query result.

[0056] In one embodiment of the present disclosure, the current driving environment parameters include: engine water temperature and altitude.

[0057] In one embodiment of the present disclosure, the third determining module 230 is configured to:

[0058] When the query result is that the pre-stored correspondence relationship includes the torque error value corresponding to the current driving environment parameter, the queried torque error value is determined to be the target torque error value.

[0059] In one embodiment of the present disclosure, the third determining module 230 is configured to:

[0060] When the query result shows that the pre-stored correspondence does not include the torque error value corresponding to the current driving environment parameter, determining a reference driving environment parameter having the smallest difference between the environmental parameter of the pre-stored correspondence and the current driving environment parameter;

[0061] determining a reference torque error value corresponding to a reference driving environment parameter;

[0062] The target torque error value is determined according to the reference torque error value and the environmental parameter difference between the current driving environment parameter and the reference driving environment parameter.

[0063] In one embodiment of the present disclosure, the third determining module 230 is configured to:

[0064] Determine the unit torque error value corresponding to the unit environmental parameter difference value according to the pre-stored corresponding relationship;

[0065] Calculate the product of the environmental parameter difference and the unit torque error value corresponding to the unit environmental parameter difference;

[0066] The reference torque error value and the product value are summed to determine the target torque error value.

[0067] In one embodiment of the present disclosure, it further includes: a building module for:

[0068] When the current control gear is a preset gear, obtaining the actual transmission input shaft torque corresponding to the current control gear;

[0069] Construct and store the correspondence between the actual transmission input shaft torque and the vehicle's current driving environment parameters.

[0070] In one embodiment of the present disclosure, the calibration module 240 is configured to:

[0071] Calculate the input shaft torque difference between the initial transmission input shaft torque corresponding to the current control gear and the target torque error value;

[0072] The initial transmission input shaft torque is calibrated to the input shaft torque difference.

[0073] The calibration device for the transmission input shaft torque provided in the embodiment of the present disclosure can execute the calibration method for the transmission input shaft torque provided in any embodiment of the present disclosure, and has the corresponding functional modules and beneficial effects of the execution method.

[0074] In order to implement the above embodiments, the present disclosure further proposes a computer program product, including a computer program / instruction, which implements the method for calibrating the transmission input shaft torque in the above embodiments when executed by a processor.

[0075] To implement the above embodiment, the present disclosure further provides a vehicle, comprising: a processor; a memory for storing processor-executable instructions; and a processor configured to read the executable instructions from the memory and execute the executable instructions to implement the above transmission input shaft torque calibration method.

[0076] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment, or a part of code, and the module, program segment, or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of the boxes in the block diagram and / or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0077] The units involved in the embodiments described in this disclosure may be implemented in software or hardware, wherein the name of a unit does not necessarily limit the unit itself.

[0078] The functions described above herein may be performed, at least in part, by one or more hardware logic components. For example, and without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

[0079] In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of machine-readable storage media may include an electrical connection based on one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), optical fibers, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0080] The above description is merely a preferred embodiment of the present disclosure and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the present disclosure is not limited to technical solutions formed by specific combinations of the aforementioned technical features. It also encompasses other technical solutions formed by any combination of the aforementioned technical features or their equivalents, without departing from the scope of the above disclosure. For example, a technical solution formed by replacing the aforementioned features with (but not limited to) technical features with similar functions disclosed in this disclosure.

[0081] In addition, although each operation is described in a specific order, this should not be understood as requiring these operations to be performed in the specific order shown or in a sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although some specific implementation details have been included in the above discussion, these should not be interpreted as limiting the scope of the present disclosure. Some features described in the context of a separate embodiment can also be implemented in a single embodiment in combination. On the contrary, the various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination mode.

[0082] Although the subject matter has been described in language specific to structural features and / or methodological logical acts, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are merely example forms of implementing the claims.

Claims

1. A method for calibrating the torque of a gearbox input shaft, characterized in that: The following steps are involved: When an engine in a vehicle is started, determining a current control gear of the vehicle and an initial transmission input shaft torque corresponding to the current control gear; Determining whether the current control gear is a preset gear, wherein the initial transmission input shaft torque corresponding to the preset gear is 0; When the current control gear is not the preset gear, obtaining a current driving environment parameter of the vehicle, and querying a pre-stored correspondence relationship based on the current driving environment parameter; if the query result shows that the pre-stored correspondence relationship does not include the torque error value corresponding to the current driving environment parameter, determining a reference driving environment parameter in the pre-stored correspondence relationship having the smallest environmental parameter difference with the current driving environment parameter; determining a reference torque error value corresponding to the reference driving environment parameter; Determining a unit torque error value corresponding to a unit environmental parameter difference value according to the pre-stored corresponding relationship; Calculating a product value of the environmental parameter difference and a unit torque error value corresponding to the unit environmental parameter difference; summing the reference torque error value and the product value to determine a target torque error value; The initial transmission input shaft torque corresponding to the current control gear is calibrated according to the target torque error value.

2. The method according to claim 1, wherein Current driving environment parameters include: engine water temperature and altitude.

3. The method according to claim 1, wherein After querying the pre-stored corresponding relationship according to the current driving environment parameters, the method further includes: When the query result is that the pre-stored correspondence includes the torque error value corresponding to the current driving environment parameter, the queried torque error value is determined to be the target torque error value.

4. The method according to any one of claims 1 to 3, characterized in that: After determining whether the current control gear is a preset gear, the method further includes: When the current control gear is the preset gear, obtaining an actual transmission input shaft torque corresponding to the current control gear; A correspondence between the actual transmission input shaft torque and the current driving environment parameters of the vehicle is constructed and stored.

5. The method according to any one of claims 1 to 3, characterized in that: The calibrating the initial transmission input shaft torque corresponding to the current control gear according to the target torque error value includes: Calculating an input shaft torque difference between an initial transmission input shaft torque corresponding to the current control gear and the target torque error value; The initial transmission input shaft torque is calibrated to the input shaft torque difference.

6. A calibration device for a gearbox input shaft torque, characterized in that: include: a first determining module, configured to determine, when an engine in a vehicle is started, a current control gear of the vehicle and an initial transmission input shaft torque corresponding to the current control gear; a second determining module, configured to determine whether the currently controlled gear is a preset gear, wherein the initial transmission input shaft torque corresponding to the preset gear is 0; a third determining module, configured to, when the current control gear is not the preset gear, obtain a current driving environment parameter of the vehicle, query a pre-stored correspondence relationship based on the current driving environment parameter, and, if a query result shows that the pre-stored correspondence relationship does not include a torque error value corresponding to the current driving environment parameter, determine a reference driving environment parameter in the pre-stored correspondence relationship having a minimum environmental parameter difference with the current driving environment parameter, determine a reference torque error value corresponding to the reference driving environment parameter, determine a unit torque error value corresponding to a unit environmental parameter difference based on the pre-stored correspondence relationship, calculate a product value of the environmental parameter difference and the unit torque error value corresponding to the unit environmental parameter difference, and sum the reference torque error value and the product value to determine a target torque error value; The calibration module is used to calibrate the initial transmission input shaft torque corresponding to the current control gear according to the target torque error value.

7. A vehicle, characterized in that: The vehicle comprises: processor; a memory for storing instructions executable by the processor; The processor is configured to read the executable instructions from the memory and execute the executable instructions to implement the method for calibrating the transmission input shaft torque as described in any one of claims 1 to 5.

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