Shift control method, device, TCU device and storage medium for commercial vehicle

Abstract

The present invention provides a shifting control method, device, TCU device and storage medium for a commercial vehicle, belonging to the technical field of automobiles. The method includes: when it is determined that the vehicle has a shifting request and the vehicle meets the shifting conditions, controlling the engine to reduce the torque to zero; controlling the AMT clutch to disengage when the engine torque drops to zero or within a first preset time period before the engine torque drops to zero; controlling the power take-off clutch to disengage within a second preset time period before the AMT clutch disengages; after the power take-off clutch disengages, controlling the gearbox to shift gears; after the gearbox completes gear shifting, controlling the power take-off clutch to engage; after the power take-off clutch engages, controlling the AMT clutch to engage and controlling the engine to resume to the target torque. By controlling the AMT clutch and the power take-off clutch to disengage after the engine torque is reduced, the present invention solves the problems of troublesome shifting process and inconvenient operation of commercial vehicles.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and particularly to a shifting control method, device, TCU device and storage medium for a commercial vehicle. Background Art

[0002] From the perspective of user use, there are many vehicle power take-off models and application working conditions for commercial vehicles such as special vehicles and trucks. Vehicle power take-off is generally divided into two power take-off methods: parking power take-off and driving power take-off. Parking power take-off means that the vehicle performs power take-off operations in a stationary state, such as the lifting of the cargo box in a static state. Driving power take-off means that the vehicle first engages the power take-off in a stationary state and then starts to drive, and continuously performs power take-off operations during driving, such as a sprinkler truck. The power take-off method of a commercial vehicle equipped with an AMT transmission is similar to the above.

[0003] In the existing driving power take-off, shifting cannot be performed during the driving power take-off process. If shifting is required, the vehicle needs to be stopped first, the power take-off is disconnected, then shifted to a new gear, the power take-off is engaged, and then the vehicle starts to drive to achieve power take-off during the driving process.

[0004] In summary, the existing shifting process of commercial vehicles is relatively troublesome and inconvenient to operate. Summary of the Invention

[0005] In view of this, it is necessary to provide a shifting control method, device, TCU device and storage medium for a commercial vehicle to solve the technical problem that the shifting process of commercial vehicles is relatively troublesome and inconvenient to operate.

[0006] To solve the above problems, on the one hand, the present invention provides a shifting control method for a commercial vehicle, including:

[0007] When it is determined that the vehicle has a shifting request and the vehicle meets the shifting conditions, controlling the engine to reduce the torque to zero;

[0008] When the engine torque drops to zero, or within a first preset time period before the engine torque drops to zero, controlling the AMT clutch to disengage;

[0009] Within a second preset time period before the AMT clutch disengages, controlling the power take-off clutch to disengage;

[0010] After the power take-off clutch disengages, controlling the gearbox to shift gears;

[0011] After the gearbox completes shifting gears, controlling the power take-off clutch to engage;

[0012] After the power take-off clutch engages, controlling the AMT clutch to engage and controlling the engine to resume to the target torque.

[0013] In a possible implementation manner, determining that the vehicle meets the shifting condition includes:

[0014] When it is determined that the operating condition of the power take-off meets the preset requirements, it is determined that the vehicle meets the shifting condition.

[0015] In a possible implementation manner, when it is determined that the operating condition of the power take-off meets the preset requirements, determining that the vehicle meets the shifting condition includes:

[0016] When it is determined that the air pressure signal in the clutch chamber of the power take-off, the solenoid valve signal, and the rotational speed signal of the output shaft of the power take-off meet the preset requirements, it is determined that the vehicle meets the shifting condition.

[0017] In a possible implementation manner, determining that the vehicle has a shifting request includes:

[0018] When it is determined that a request signal for manual intervention in shifting is received or the shifting point calculated autonomously by the AMT meets the preset shifting point requirements, it is determined that the vehicle has a shifting request.

[0019] In a possible implementation manner, controlling the power take-off clutch to disengage includes:

[0020] Controlling the solenoid valve of the power take-off clutch to discharge the air pressure in the chamber of the power take-off clutch to disengage the power take-off clutch.

[0021] In a possible implementation manner, controlling the power take-off clutch to engage includes:

[0022] Controlling the solenoid valve of the power take-off clutch to supply air to the chamber of the power take-off clutch to engage the power take-off clutch.

[0023] In a possible implementation manner, controlling the AMT clutch to engage includes:

[0024] Controlling the AMT clutch to engage at a target rate;

[0025] Wherein, the target speed is lower than the normal engagement rate of the clutch.

[0026] On the other hand, the present invention further provides a shifting control device for a commercial vehicle, including:

[0027] A torque adjustment module, configured to control the engine to reduce the torque to zero when it is determined that the vehicle has a shifting request and the vehicle meets the shifting condition;

[0028] A first separation module, configured to control the AMT clutch to disengage when the engine torque drops to zero or within a first preset period before the engine torque drops to zero;

[0029] A second separation module, configured to control the power take-off clutch to separate within a second preset period before the AMT clutch separates;

[0030] A gear shifting control module, configured to control the gearbox to shift gears after the power take-off clutch separates;

[0031] A first engagement module, configured to control the power take-off clutch to engage after the gearbox completes gear shifting;

[0032] A second engagement module, configured to control the AMT clutch to engage and control the engine to resume to the target torque after the power take-off clutch engages.

[0033] On the other hand, the present invention further provides a TCU device, including a memory and a processor, wherein,

[0034] The memory is used for storing programs;

[0035] The processor is coupled to the memory and is configured to execute the programs stored in the memory to implement the steps of the gear shifting control method for a commercial vehicle as described in any one of the above.

[0036] On the other hand, the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the gear shifting control method for a commercial vehicle as described in any one of the above are implemented.

[0037] The beneficial effects of adopting the above implementation manner are as follows: The gear shifting control method, device, TCU device and storage medium for a commercial vehicle provided by the present invention, when it is determined that the vehicle has a gear shifting request and the vehicle meets the gear shifting conditions, first control the engine to reduce the torque to zero, then control the AMT clutch to separate to disconnect the engine power source, and then the power take-off clutch separates. Since the air circuit response time is relatively slow, when the AMT clutch is about to separate, it is necessary to discharge the air pressure in the power take-off clutch cavity through the power take-off clutch solenoid valve to separate the clutch, so as to shorten the gear shifting time, reduce the power loss caused by the interruption and connection of the power take-off, ensure the gear shifting power performance, and prevent gear shifting failure; then, perform gear shifting of the gearbox and engagement of the power take-off clutch, and finally engage the AMT clutch and resume the engine torque to complete the gear shifting operation of the commercial vehicle. The gear shifting control method provided by the present invention can first control the engine to reduce the torque to zero, then control the AMT clutch to separate and then perform engine gear shifting, without stopping the vehicle, and without disconnecting the power take-off and then engaging the power take-off for gear shifting, so as to solve the technical problems of troublesome gear shifting process and inconvenient operation of commercial vehicles. Description of the Drawings

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0039] Figure 1 It is a flowchart of an embodiment of the shift control method for a commercial vehicle provided by the present invention;

[0040] Figure 2 It is a flowchart of another embodiment of the shift control method for a commercial vehicle provided by the present invention;

[0041] Figure 3 It is a schematic block diagram of an embodiment of the shift control device for a commercial vehicle provided by the present invention;

[0042] Figure 4 It is a schematic structural diagram of an embodiment of the TCU device provided by the present invention. Detailed implementation manners

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present invention.

[0044] In the description of the embodiments of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0045] In the embodiments of the present invention, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product or equipment including a series of steps or modules does not necessarily limit to those clearly listed steps or modules, but may include other steps or modules not clearly listed or inherent to these processes, methods, products or equipment.

[0046] In the embodiments of the present invention, the naming or numbering of steps does not mean that the steps in the method flow must be executed in the time / logical sequence indicated by the naming or numbering. The already named or numbered process steps can change the execution order according to the technical purpose to be achieved, as long as the same or similar technical effects can be achieved.

[0047] References to "embodiments" in this specification mean that particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the invention. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive of other embodiments. Those skilled in the art will understand explicitly and implicitly that the embodiments described herein can be combined with other embodiments.

[0048] The present invention provides a shift control method, device, TCU (Transmission Control Unit) device for a commercial vehicle, and a storage medium, which will be described separately below.

[0049] As Figure 1 shown, the present invention provides a shift control method for a commercial vehicle, including:

[0050] S101. When it is determined that the vehicle has a shift request and the vehicle meets the shift condition, control the engine to reduce the torque to zero;

[0051] S102. When the engine torque drops to zero, or within a first preset period before the engine torque drops to zero, control the AMT (Automated Mechanical Transmission) clutch to disengage;

[0052] S103. Within a second preset period before the AMT clutch disengages, control the power take-off clutch to disengage;

[0053] S104. After the power take-off clutch disengages, control the transmission to shift gears;

[0054] S105. After the transmission completes shifting gears, control the power take-off clutch to engage;

[0055] S106. After the power take-off clutch engages, control the AMT clutch to engage and control the engine to resume to the target torque.

[0056] It can be understood that the method provided by the present invention can be executed based on the TCU. The AMT clutch is the clutch of the AMT, and the power take-off clutch is the clutch of the power take-off. The method provided by the present invention performs subsequent shift operations only when the vehicle has a shift requirement and meets the shift condition.

[0057] The method provided by the present invention mainly includes the following steps:

[0058] 1. Determine whether there is a shift request;

[0059] 2. Determine whether the shift condition is met;

[0060] 3. Engine torque reduction;

[0061] 4. The AMT clutch disengages;

[0062] 5. The power take-off clutch disengages;

[0063] 6. The transmission gears are shifted;

[0064] 7. The power take-off clutch engages;

[0065] 8. The AMT clutch engages.

[0066] When the engine torque drops to zero, or within a first preset time period before the engine torque drops to zero, control the AMT clutch to disengage, that is, when the engine torque drops to zero, or when the engine torque is about to drop to zero, control the AMT clutch to disengage.

[0067] Within a second preset time period before the AMT clutch disengages, control the power take-off clutch to disengage, that is, when the AMT clutch is about to disengage, the TCU needs to discharge the air pressure in the power take-off clutch cavity through the power take-off clutch solenoid valve to disengage the clutch.

[0068] In some embodiments, determining that the vehicle meets the shifting condition includes:

[0069] When it is determined that the operating condition of the power take-off meets the preset requirements, it is determined that the vehicle meets the shifting condition.

[0070] Further, when it is determined that the operating condition of the power take-off meets the preset requirements, determining that the vehicle meets the shifting condition includes:

[0071] When it is determined that the air pressure signal in the power take-off clutch cavity, the solenoid valve signal, and the power take-off output shaft speed signal meet the preset requirements, it is determined that the vehicle meets the shifting condition.

[0072] It can be understood that to determine whether the shifting condition is met: if there is a shifting request, based on the operating condition of the power take-off, the TCU needs to determine whether the air pressure in the power take-off clutch cavity, the solenoid valve, and the power take-off output shaft speed signal are normal, etc. If the relevant signals are normal, the normal shifting logic can be executed.

[0073] In some embodiments, determining that the vehicle has a shifting request includes:

[0074] When it is determined that a request signal for manual intervention shifting is received or the shifting point calculated by the AMT autonomously meets the preset shifting point requirements, it is determined that the vehicle has a shifting request.

[0075] It can be understood that to determine whether there is a gear shifting request: the gear shifting request is determined according to the user's manual intervention request or the gear shifting point independently calculated by the AMT.

[0076] In some embodiments, controlling the power take-off clutch to disengage includes:

[0077] Controlling the solenoid valve of the power take-off clutch to discharge the air pressure in the cavity of the power take-off clutch, so as to disengage the power take-off clutch.

[0078] It can be understood that when the power take-off clutch disengages: due to the relatively slow response time of the air circuit, when the AMT clutch is about to disengage, the TCU needs to discharge the air pressure in the cavity of the power take-off clutch through the solenoid valve of the power take-off clutch to disengage the clutch, so as to shorten the gear shifting time, reduce the power loss caused by the interruption and connection of the power take-off, ensure the power performance during gear shifting, and prevent gear shifting failure.

[0079] In some embodiments, controlling the power take-off clutch to engage includes:

[0080] Controlling the solenoid valve of the power take-off clutch to supply air to the cavity of the power take-off clutch, so as to engage the power take-off clutch.

[0081] It can be understood that when the power take-off clutch engages: the TCU connects the solenoid valve of the power take-off clutch to supply air to the cavity of the power take-off clutch, and the clutch will engage and resume power take-off.

[0082] In some embodiments, controlling the AMT clutch to engage includes:

[0083] Controlling the AMT clutch to engage at a target rate;

[0084] Wherein, the target speed is lower than the normal engagement rate of the clutch.

[0085] It can be understood that when the AMT clutch engages and the engine torque is restored: the AMT clutch engages the clutch according to a certain engagement slope, and the engagement process needs to be slower than the normal clutch engagement, so as to still be able to engage smoothly after adding the clutch power take-off at the load end, and at the same time the engine gradually restores the torque to the user-requested torque.

[0086] In some embodiments, the present invention provides a gear shifting control method for a commercial vehicle, as Figure 2 shown, and its implementation steps are as follows:

[0087] Determine whether there is a gear shifting request: determine the gear shifting request according to the user's manual intervention request or the gear shifting point independently calculated by the AMT;

[0088] Determine whether the shifting conditions are met: If there is a shifting request, based on the operating conditions of the power take-off, the TCU needs to determine conditions such as the air pressure in the clutch chamber of the power take-off, the solenoid valve, and the rotational speed signal of the output shaft of the power take-off to be normal. If the relevant signals are normal, the normal shifting logic can be executed;

[0089] Engine torque reduction: According to the TCU request, the engine reduces torque according to the slope formulated by the TCU until the torque drops to 0;

[0090] The AMT clutch is disengaged: When the engine has completed or is about to complete torque reduction, the TCU can execute the action of disengaging the AMT clutch to disconnect the engine power source;

[0091] The power take-off clutch is disengaged: Due to the relatively slow response time of the air circuit, when the AMT clutch is about to disengage, the TCU needs to discharge the air pressure in the clutch chamber of the power take-off through the solenoid valve of the power take-off clutch to disengage the clutch, so as to shorten the shifting time, reduce the power loss caused by the interruption and connection of the power take-off, ensure the shifting power performance, and prevent shifting failure;

[0092] The gearbox is shifted: The TCU executes the normal gear shifting and gear engagement operations of the gearbox;

[0093] The power take-off clutch is engaged: The TCU connects the solenoid valve of the power take-off clutch to supply air to the clutch chamber of the power take-off, and the clutch will be engaged to resume power take-off;

[0094] The AMT clutch is engaged and the engine torque is restored: The AMT clutch engages the clutch according to a certain engagement slope. The engagement process needs to be slower than the normal clutch engagement so that it can still engage smoothly after adding the clutch power take-off at the load end. At the same time, the engine gradually restores the torque to the user-requested torque.

[0095] In summary, the shifting control method for commercial vehicles provided by the present invention includes: when it is determined that the vehicle has a shifting request and the vehicle meets the shifting conditions, controlling the engine to reduce the torque to zero; when the engine torque drops to zero, or within a first preset time period before the engine torque drops to zero, controlling the AMT clutch to disengage; within a second preset time period before the AMT clutch disengages, controlling the power take-off clutch to disengage; after the power take-off clutch disengages, controlling the gearbox to engage; after the gearbox completes gear engagement, controlling the power take-off clutch to engage; after the power take-off clutch engages, controlling the AMT clutch to engage and controlling the engine to restore to the target torque.

[0096] The shift control method for commercial vehicles provided by the present invention, when it is determined that the vehicle has a shift request and the vehicle meets the shift conditions, first controls the engine to reduce the torque to zero, then controls the AMT clutch to disengage to disconnect the engine power source, and then the power take-off clutch disengages. Due to the relatively slow response time of the air circuit, when the AMT clutch is about to disengage, it is necessary to discharge the air pressure in the power take-off clutch chamber through the power take-off clutch solenoid valve to disengage the clutch, so as to shorten the shift time, reduce the power loss caused by the interruption and connection of the power take-off, ensure the shift power performance, and prevent shift failure; then, perform gear shifting of the transmission and engage the power take-off clutch, and finally engage the AMT clutch and restore the engine torque to complete the shift operation of the commercial vehicle. The shift control method provided by the present invention can first control the engine to reduce the torque to zero, then control the AMT clutch to disengage and then perform engine shifting, without stopping the vehicle, and without disconnecting the power take-off before shifting and engaging the power take-off, so as to solve the technical problems of troublesome shift process and inconvenient operation of commercial vehicles.

[0097] As Figure 3 shown, the present invention also provides a shift control device 300 for a commercial vehicle, including:

[0098] A torque adjustment module 301, configured to control the engine to reduce the torque to zero when it is determined that the vehicle has a shift request and the vehicle meets the shift conditions;

[0099] A first separation module 302, configured to control the AMT clutch to disengage when the engine torque drops to zero or within a first preset time period before the engine torque drops to zero;

[0100] A second separation module 303, configured to control the power take-off clutch to disengage within a second preset time period before the AMT clutch disengages;

[0101] A gear shifting control module 304, configured to control the transmission to shift gears after the power take-off clutch disengages;

[0102] A first engagement module 305, configured to control the power take-off clutch to engage after the transmission completes gear shifting;

[0103] A second engagement module 306, configured to control the AMT clutch to engage and control the engine to restore to the target torque after the power take-off clutch engages.

[0104] The shift control device for a commercial vehicle provided in the above embodiment can implement the technical solutions described in the shift control method embodiment of the above commercial vehicle. The specific implementation principles of the above modules or units can be referred to the corresponding content in the shift control method embodiment of the above commercial vehicle, which will not be elaborated here.

[0105] AsFigure 4 As shown, the present invention also correspondingly provides a TCU device 400. The TCU device 400 includes a processor 401, a memory 402, and a display 403. Figure 4 Only some components of the TCU device 400 are shown, but it should be understood that it is not required to implement all the shown components, and more or fewer components can be alternatively implemented.

[0106] In some embodiments, the memory 402 can be an internal storage unit of the TCU device 400, such as the hard disk or memory of the TCU device 400. In other embodiments, the memory 402 can also be an external storage device of the TCU device 400, such as a plug-in hard disk equipped on the TCU device 400, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc.

[0107] Furthermore, the memory 402 can also include both the internal storage unit and the external storage device of the TCU device 400. The memory 402 is used to store the application software installed on the TCU device 400 and various types of data.

[0108] In some embodiments, the processor 401 can be a Central Processing Unit (CPU), a microprocessor, or other data processing chips, and is used to run the program code stored in the memory 402 or process data, such as the shift control method for commercial vehicles in the present invention.

[0109] In some embodiments, the display 403 can be an LED display, a liquid crystal display, a touch liquid crystal display, and an OLED (Organic Light-Emitting Diode) toucher, etc. The display 403 is used to display the information in the TCU device 400 and to display a visual user interface. The components 401 - 403 of the TCU device 400 communicate with each other through a system bus.

[0110] In some embodiments of the present invention, when the processor 401 executes the shift control program for commercial vehicles in the memory 402, the following steps can be achieved:

[0111] When it is determined that the vehicle has a shift request and it is determined that the vehicle meets the shift conditions, control the engine to reduce the torque to zero;

[0112] When the engine torque drops to zero, or within a first preset period before the engine torque drops to zero, control the AMT clutch to disengage;

[0113] Within a second preset period before the AMT clutch disengages, control the power take-off clutch to disengage;

[0114] After the power take-off clutch disengages, control the gearbox to shift gears;

[0115] After the gearbox has completed shifting gears, control the power take-off clutch to engage;

[0116] After the power take-off clutch engages, control the AMT clutch to engage and control the engine to resume to the target torque.

[0117] It should be understood that when the processor 401 executes the shift control program of the commercial vehicle in the memory 402, in addition to the above functions, other functions can also be realized. For specific details, reference can be made to the description of the corresponding method embodiments above.

[0118] Furthermore, the embodiments of the present invention do not specifically limit the type of the TCU device 400 mentioned. The TCU device 400 can be a mobile phone, a tablet computer, a personal digital assistant (PDA), a wearable device, a laptop computer, or other portable TCU devices. Exemplary embodiments of the portable TCU device include, but are not limited to, portable TCU devices running IOS, android, microsoft, or other operating systems. The above-mentioned portable TCU devices can also be other portable TCU devices, such as a laptop computer with a touch-sensitive surface (such as a touch panel). It should also be understood that in some other embodiments of the present invention, the TCU device 400 can also not be a portable TCU device, but a desktop computer with a touch-sensitive surface (such as a touch panel).

[0119] On the other hand, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it realizes the shift control method for a commercial vehicle provided by the above-mentioned various methods. The method includes:

[0120] When it is determined that the vehicle has a shift request and the vehicle meets the shift conditions, control the engine to reduce the torque to zero;

[0121] When the engine torque drops to zero, or within a first preset period before the engine torque drops to zero, control the AMT clutch to disengage;

[0122] Within a second preset period before the AMT clutch disengages, control the power take-off clutch to disengage;

[0123] After the power take-off clutch disengages, control the gearbox to shift gears;

[0124] After the gearbox has completed gear shifting, control the power take-off clutch to engage;

[0125] After the power take-off clutch engages, control the AMT clutch to engage and control the engine to resume to the target torque.

[0126] Those skilled in the art can understand that all or part of the processes of implementing the methods of the above embodiments can be completed by instructing relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium. Among them, the computer-readable storage medium is a disk, an optical disc, a read-only memory or a random access memory, etc.

[0127] The above has introduced in detail the gear shifting control method, device, TCU device and storage medium of the commercial vehicle provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A commercial vehicle shift control method, characterized in that: include: When it is determined that there is a gear shift request for the vehicle and that the vehicle meets the gear shift conditions, controlling the engine to reduce the torque to zero; When the engine torque drops to zero, or within a first preset period before the engine torque drops to zero, controlling the AMT clutch to be disengaged; Controlling the power take-off clutch to be disengaged within a second preset period before the AMT clutch is disengaged; After the power take-off clutch is disengaged, the transmission is controlled to shift into gear; After the gearbox is engaged, the power take-off clutch is controlled to engage; After the power take-off clutch is engaged, the AMT clutch is controlled to engage and the engine is controlled to recover to the target torque; Determine whether the vehicle meets the gear shifting conditions, including: When it is determined that the air pressure signal in the clutch cavity of the power take-off, the solenoid valve signal and the speed signal of the output shaft of the power take-off meet the preset requirements, it is determined that the vehicle meets the gear shifting condition; Determine whether the vehicle has a gear shift request, including: In the case where it is determined that a manual shift intervention request signal is received or the shift point calculated autonomously by the AMT satisfies a preset shift point requirement, determining that the vehicle has a shift request; Control the AMT clutch to engage, including: Control the AMT clutch to engage according to the target speed; The target speed is lower than the normal engagement speed of the clutch.

2. The commercial vehicle shift control method according to claim 1, characterized in that: Control the power take-off clutch to disengage, including: The solenoid valve controlling the power take-off clutch discharges the air pressure in the cavity of the power take-off clutch to disengage the power take-off clutch.

3. The commercial vehicle shift control method according to claim 1, characterized in that: Control the power take-off clutch to engage, including: The solenoid valve that controls the power take-off clutch supplies air to the cavity of the power take-off clutch to engage the power take-off clutch.

4. A gear shift control device for a commercial vehicle, characterized in that: include: The torque adjustment module is used to control the engine to reduce the torque to zero when it is determined that there is a gear shift request of the vehicle and the vehicle meets the gear shift condition; A first separation module, used for controlling the AMT clutch to be separated when the engine torque drops to zero or within a first preset period before the engine torque drops to zero; A second separation module is used to control the power take-off clutch to be separated within a second preset period before the AMT clutch is separated; The gear shift control module is used to control the transmission to shift gears after the power take-off clutch is disengaged; The first engagement module is used to control the power take-off clutch to engage after the gearbox is engaged; A second engagement module is used to control the AMT clutch to engage and control the engine to recover to the target torque after the power take-off clutch is engaged; Determine whether the vehicle meets the gear shifting conditions, including: When it is determined that the air pressure signal in the clutch cavity of the power take-off, the solenoid valve signal and the speed signal of the output shaft of the power take-off meet the preset requirements, it is determined that the vehicle meets the gear shifting condition; Determine whether the vehicle has a gear shift request, including: In the case where it is determined that a manual shift intervention request signal is received or the shift point calculated autonomously by the AMT satisfies a preset shift point requirement, determining that the vehicle has a shift request; Control the AMT clutch to engage, including: Control the AMT clutch to engage according to the target speed; The target speed is lower than the normal engagement speed of the clutch.

5. A TCU device, characterized in that: comprising a memory and a processor, wherein: The memory is used to store programs; The processor is coupled to the memory and is used to execute the program stored in the memory to implement the steps of the commercial vehicle shift control method according to any one of claims 1 to 3.

6. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the commercial vehicle shift control method according to any one of claims 1 to 3 are implemented.

Images