Gear shift control method, device and system for vehicle transmission

Abstract

The application discloses a gear shifting control method, device and system of a vehicle gearbox, and belongs to the technical field of vehicle control. The method comprises the following steps: receiving a gear shifting request; in the case that the current actual input power of the input shaft of the gearbox does not meet the gear shifting condition, entering an auxiliary gear shifting mode; in the case that the actual input power meets the auxiliary condition, adjusting the actual input power according to the auxiliary gear shifting mode; and in the case that the adjusted actual input power of the input shaft meets the gear shifting condition, performing a gear shifting operation according to the gear shifting request. Through the method, the input power of the gearbox can be adjusted according to the auxiliary gear shifting mode when the gearbox of the vehicle does not meet the gear shifting condition, so that a buffer and protection space is provided for the gearbox, and gear shifting impact and other problems caused by forced gear shifting are effectively avoided.

Description

TECHNICAL FIELD

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

[0002] During vehicle driving, when driving conditions such as vehicle speed, load, road conditions, etc. change, a gear shifting operation usually needs to be performed on the vehicle to adapt to different driving conditions and requirements.

[0003] In order to ensure the comfort, safety, economy, etc. of the vehicle during driving, the gear shifting process needs to be as smooth as possible, and the gear shifting time also needs to be as short as possible. In related technologies, the gear shifting process of the vehicle mainly includes two steps, which are: first, the engine is speed-adjusted by the motor at the engine end, so that the engine speed is adapted to the current vehicle speed; then, the clutch is combined to couple the engine end and the wheel end after speed adjustment.

[0004] However, the related technologies at least have the following technical problems: when the engine is speed-adjusted, the motor speed control at the engine end requires a high requirement, and the motor needs to adjust the engine to the target speed within a short response time. In addition, when the motor fails to complete the speed adjustment target within the target time, the forced combination of the clutch to complete the coupling of the engine end and the wheel end will also cause gear shifting impact, clutch hardware wear, etc. SUMMARY

[0005] The present application provides a gear shifting control method, device and system of a vehicle transmission to solve the technical problems in related technologies. The technical solutions include the following.

[0006] In a first aspect, the present application provides a gear shifting control method of a vehicle transmission, which includes: receiving a gear shifting request; in a case where the actual input power of an input shaft of the transmission does not meet a gear shifting condition, entering an auxiliary gear shifting mode; in a case where the actual input power meets an auxiliary condition, adjusting the actual input power according to the auxiliary gear shifting mode; and in a case where the adjusted actual input power meets the gear shifting condition, performing a gear shifting operation according to the gear shifting request.

[0007] In some possible implementation manners, the gear shifting condition includes that a difference between the actual input power and an expected input of the transmission corresponding to the gear shifting request falls within a first difference range for a time length reaching a first time length threshold within a first preset time period.

[0008] In other possible implementation manners, the auxiliary condition includes that a difference between the actual input power and an expected input of the transmission corresponding to the gear shifting request falls within a second difference range for a time length reaching a second time length threshold within a second preset time period.

[0009] In some possible implementation, the transmission comprises a clutch, and the adjusting the actual input power according to the auxiliary shift mode comprises: controlling the clutch to enter a slip state to adjust the actual input power.

[0010] In some possible implementation, the transmission comprises a first motor connected with the input shaft, and the actual input power comprises: a current rotating speed of the first motor.

[0011] In some possible implementation, the transmission comprises a second motor connected with an output shaft of the transmission, and after receiving the shift request, the method further comprises: determining the expected input according to a rotating speed of the second motor and a transmission ratio between the input shaft and the output shaft corresponding to the shift request.

[0012] In some possible implementation, the method for shift control of the vehicle transmission further comprises: in response to the actual input power of the input shaft of the transmission satisfying a shift condition, performing a shift operation according to the shift request.

[0013] In some possible implementation, the entering the auxiliary shift mode further comprises: in response to the actual input power of the input shaft after the adjustment according to the auxiliary shift mode not satisfying the shift condition, terminating the current shift request.

[0014] In a second aspect, the present application provides a shift control device for a vehicle transmission, comprising: a receiving module configured to receive a shift request; a control module configured to enter an auxiliary shift mode in a case where an actual input power of an input shaft of the transmission does not satisfy a shift condition, and adjust the actual input power according to the auxiliary shift mode in a case where the actual input power satisfies an auxiliary condition; and the control module is further configured to perform a shift operation according to the shift request in a case where the actual input power after the adjustment satisfies the shift condition.

[0015] In some possible implementation, the shift condition comprises: a difference between the actual input power and an expected input of the transmission corresponding to the shift request, and a time length in which the difference falls into a first difference range within a first preset time period reaches a first time length threshold.

[0016] In some possible implementation, the transmission comprises a clutch, and the control module is further configured to control the clutch to enter a slip state to adjust the actual input power.

[0017] In some possible implementation manners, the gearbox comprises a first motor in driving connection with the input shaft, and the actual input power comprises a current rotating speed of the first motor.

[0018] In some possible implementation manners, the gearbox comprises a second motor in driving connection with an output shaft of the gearbox, and after receiving the shift request, the control module is further configured to determine the expected input according to a rotating speed of the second motor and a gear ratio between the input shaft and the output shaft corresponding to the shift request.

[0019] In some possible implementation manners, the control module is further configured to perform the shift operation according to the shift request in response to the actual input power of the input shaft of the gearbox satisfying a shift condition.

[0020] In some possible implementation manners, the control module is further configured to terminate the current shift request in response to the actual input power of the input shaft after being adjusted according to the auxiliary shift mode not satisfying the shift condition.

[0021] In a third aspect, the present application provides a computer readable storage medium having stored thereon program instructions for shift control of a vehicle gearbox, which, when executed by a control unit, cause the method in the first aspect or any possible implementation manner of the first aspect to be implemented.

[0022] In a fourth aspect, an electronic device is provided, which comprises a memory and a processor, and at least one computer program is stored in the memory, and the at least one computer program is loaded and executed by the processor, so that the electronic device implements the method in the first aspect or any possible implementation manner of the first aspect.

[0023] In a fifth aspect, the present application provides a vehicle system for shift control of a gearbox, comprising: a gearbox configured to adjust a gear of a vehicle; and a controller in communication connection with the gearbox, configured to execute the method in the first aspect or any possible implementation manner of the first aspect to perform shift control on the gearbox.

[0024] In a sixth aspect, a computer program (product) is provided, which comprises computer program / instructions executed by a processor to cause a computer to implement the method in the first aspect or any possible implementation manner of the first aspect.

[0025] The technical scheme provided by the present application has at least the following beneficial effects:

[0026] Compared with the mode of receiving a shift request and regulating the speed and then directly performing a shift operation, the application identifies the current actual input power of the input shaft of the gearbox at the time of shifting through the shift condition, so that the shift request that may cause a shift shock or still cause a shift shock after the motor is regulated can enter the auxiliary shift mode to avoid the shift shock.

[0027] In addition, the application also identifies the current actual input power of the input shaft of the gearbox at the time of shifting through the auxiliary condition, so that the shift request that meets the auxiliary condition can complete the shift with the assistance of the auxiliary shift mode, so as to reduce the requirement for the motor speed control, so that part of the shift request that still causes a shift shock after the motor is regulated can complete the shift with the assistance of the auxiliary shift mode. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0029] Figure 1 is a structural schematic diagram of a vehicle transmission system provided by the embodiments of the application;

[0030] Figure 2 is a flow chart of a shift control method of a vehicle gearbox provided by the embodiments of the application;

[0031] Figure 3 is a structural schematic diagram of a shift control device of a vehicle gearbox provided by the embodiments of the application;

[0032] Figure 4 is a structural schematic diagram of an electronic device for shift control of a vehicle gearbox provided by the embodiments of the application;

[0033] Figure 5 is a schematic diagram of a vehicle system for shift control of a gearbox provided by the embodiments of the application. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are some of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0035] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The description below refers to the accompanying drawings, which show, by way of example, specific embodiments with which the application can be practiced. The following detailed description is not intended to limit the application. Rather, the following detailed description includes specific details for the purpose of providing a thorough understanding of the inventive concepts. However, it will be apparent to those skilled in the art that the application can be practiced without these specific details. In some instances, well-known structures and functions have not been described in detail in order to avoid obscuring aspects of the application.

[0036] The process of vehicle gear shifting is essentially the process of adjusting the transmission ratio of the transmission system in the vehicle, and thus changing the torque and speed of the engine end output to the wheel end. During the driving of the vehicle, gear shifting can optimize the power output of the vehicle, so that the speed of the engine is adapted to the current speed of the wheel, which plays an important role in optimizing the performance of the vehicle and improving the safety, economy and comfort of the vehicle driving.

[0037] Among them, the gear shifting operation is usually realized through the gearbox. The input shaft and output shaft of the gearbox are directly or indirectly connected with the engine end and the wheel end respectively, and are the core components in the transmission system. The gearbox can adjust the torque and speed of the engine end output to the wheel end by changing the transmission ratio between the input shaft and the output shaft, so as to complete the gear shifting operation and adapt to different driving conditions of the vehicle.

[0038] Figure 1 is a structural schematic diagram of a vehicle transmission system provided by the embodiments of the application, referring to Figure 1 The engine end of the vehicle transmission system 100 can include an engine 101; the wheel end of the vehicle can include a wheel driving shaft 102; and the gearbox of the vehicle can include a clutch 103, a first motor 104, a second motor 105, an input shaft 106 and an output shaft 107.

[0039] As shown in Figure 1 The engine 101 at the engine end of the vehicle is connected with the gearbox through the input shaft 106 of the gearbox, and the wheel driving shaft 102 at the wheel end of the vehicle is connected with the gearbox through the output shaft 107 of the gearbox, so that the power output from the engine end can be transmitted to the wheel end through the gearbox to drive the vehicle to move forward. The first motor 104 located at the input shaft 106 of the gearbox is in transmission connection with the input shaft 106 of the gearbox, and can be used to adjust the speed of the engine 101. The second motor 105 located at the output shaft 107 of the gearbox can drive the wheel rotating shaft 102 to rotate. The clutch 103 is arranged between the input shaft 106 and the output shaft 107 of the gearbox, and can be used to disconnect or connect the power transmission between the engine 101 and the wheel driving shaft 102.

[0040] When the vehicle shifts gears, the gearbox controls the clutch 103 to disconnect the power transmission between the engine 101 and the wheel drive shaft 102, while the gearbox adjusts the transmission ratio between the input shaft 106 and the output shaft 107 inside the gearbox. Then, the gearbox controls the clutch 103 to reconnect the power transmission between the engine 101 and the wheel drive shaft 102.

[0041] When the power transmission between the engine 101 and the wheel drive shaft 102 is disconnected, the input shaft 106 of the gearbox includes a first end connected to the engine 101, and a second end connected to the wheel drive shaft 102. At this time, the speed of the engine 101 can be adjusted to the desired speed by the first motor 104, and the speed of the first section connected to the engine 101 is consistent with the engine and is input into the input shaft 106 of the gearbox from the first end; while the second end of the input shaft 106 of the gearbox connected to the wheel drive shaft 102 continues to be connected to the wheel drive shaft 102, and the speed of the second end changes when the transmission ratio between the input shaft 106 and the output shaft 107 of the gearbox is adjusted inside the gearbox. When the power transmission between the engine 101 and the wheel drive shaft 102 is reconnected, the adjusted speed of the engine 101 should be adapted to the speed of the wheel drive shaft 102, otherwise it will cause the speed of the first end and the second end of the input shaft 106 of the gearbox to differ too much, and further cause gear shifting shock.

[0042] As described above, in the related art, the method of directly shifting gears after adjusting the speed of the engine by the motor has a high degree of dependence on the motor control, and requires the motor to have a wide range of adjustment and accurate adjustment capability for the speed of the engine, which is technically difficult. In addition, when the motor fails to complete the speed adjustment, the actual input power of the input shaft of the gearbox will differ greatly from the expected input of the input shaft of the gearbox during gear shifting, and at this time, the driving gear and the driven gear of the forced coupling clutch will cause gear shifting shock, causing wear and tear of the clutch hardware and other problems.

[0043] In view of this, the embodiments of the present application provide a vehicle gearbox shifting control method, which optimizes the gear shifting process of the vehicle, identifies the current actual input power of the input shaft of the gearbox before the gear shifting operation through gear shifting conditions and auxiliary conditions, avoids gear shifting shock and reduces the requirement for engine speed adjustment, makes the gear shifting process more scientific and reasonable, to solve the above technical problems and ensure the safety and smoothness of the gear shifting process.

[0044] Figure 2 is a flowchart of the gear shifting control method of the vehicle gearbox provided by the embodiments of the present application, which can be executed by a control system mounted in the vehicle, and the present application does not limit this aspect. Referring to Figure 2The method for vehicle transmission gear shifting control provided in the embodiments of the present application can include the following steps.

[0045] Step S210, receiving a gear shifting request.

[0046] The gear shifting request may, for example, be issued by the vehicle when the driver operates the clutch and the gear lever according to the driving condition of the vehicle, the performance requirement of the vehicle, etc., or automatically issued by the vehicle. In some embodiments, the issuance of the gear shifting request may, for example, be issued by the HCU (Hybrid Control Unit), the VCU (Vehicle Control Unit), the PDCU (Powertrain Domain Control Unit), or any other control system that can communicate with the transmission and control the transmission to perform the gear shifting operation. The communication network carried by the vehicle may, for example, be the CAN (Controller Area Network) bus, the LIN (Local Interconnect Network) bus, the FlexRay (Flexible Ray) bus, the vehicle Ethernet, or any other communication network, and the embodiments of the present application do not make any limitation in this regard.

[0047] Step S220, entering the auxiliary gear shifting mode in the case where the current actual input power of the input shaft of the transmission does not meet the gear shifting condition.

[0048] The current actual input power of the input shaft of the transmission may, for example, be used to indicate the current speed of the vehicle wheel end, and the gear shifting condition may, for example, be used to identify the current actual input power of the input shaft. As described above, the speed of the engine after adjustment should be adapted to the speed of the vehicle wheel end during the gear shifting process, otherwise it will cause gear shifting impact. In view of this, after receiving the gear shifting request, the current actual input power of the transmission can be identified by the gear shifting condition to determine whether the current actual input power of the input shaft of the transmission when the gear shifting request is received will cause gear shifting impact, and if the gear shifting request will cause gear shifting impact, the auxiliary gear shifting mode is entered, thereby avoiding the gear shifting impact and other problems that may be caused by direct gear shifting.

[0049] In order to facilitate the collection of the actual input power of the input shaft of the transmission, a motor can be arranged at the input shaft of the transmission and in transmission connection with the input shaft of the transmission, and the current actual input power of the input shaft of the transmission is indicated by the speed of the motor. In one embodiment, the transmission may, for example, include a first motor in transmission connection with the input shaft of the transmission, and the current actual input power of the input shaft of the transmission may, for example, include the current speed of the first motor.

[0050] In one embodiment, the shift condition may, for example, include a difference between the current actual input power of the input shaft of the gearbox and the expected input of the gearbox corresponding to the shift request, a time length of the first difference range falling within a first preset time period reaching a first time length threshold. Wherein, the first difference range may be set with reference to the following criteria: a value range formed by the maximum and minimum values of the expected input that may cause shift shock centered on the current actual input power. The first preset time period may be used to ensure the instantaneous nature of the shift process; the first time length threshold may be used to provide a fluctuation space for the current actual input power of the input shaft of the gearbox, which can be adjusted by those skilled in the art according to actual application, and the present application does not make any limitation in this regard.

[0051] The expected input of the gearbox may be used to indicate the expected speed of the vehicle engine corresponding to the shift request during the shift. As described above, the purpose of the shift may, for example, be to optimize the power output of the vehicle, so that the speed of the engine is adapted to the current speed of the wheels. In other words, the process of the shift is to adjust the speed of the engine according to the current speed of the wheels, so that the speed of the engine reaches the expected speed. In view of this, in order to facilitate calculation, the expected input of the gearbox may, for example, include the expected speed of the vehicle engine. Further, the expected speed of the engine may, for example, be determined by the current speed of the wheels and the shift request. For example, a motor may be provided at the output shaft of the gearbox connected to the vehicle wheel end, and the expected speed of the engine is determined by the speed of the motor and the shift request, and then the expected input of the gearbox is determined. In one embodiment, the gearbox includes a second motor connected in transmission to the output shaft of the gearbox, and after receiving the shift request, the method of controlling the vehicle gearbox shift further includes determining the expected input according to the speed of the second motor, the transmission ratio between the input shaft and the output shaft corresponding to the shift request.

[0052] Wherein, the transmission ratio between the input shaft and the output shaft corresponding to the shift request may, for example, be the first transmission ratio; determining the expected input according to the speed of the second motor, the transmission ratio between the input shaft and the output shaft corresponding to the shift request may, for example, be achieved by the following formula (1):

[0053] Expected input = speed of second motor x first transmission ratio Formula (1).

[0054] Considering that the current actual input power of the input shaft of the gearbox can be indicated by the rotational speed of the first electric machine, for the convenience of calculation, the expected input of the input shaft of the gearbox corresponding to the shift request can be further converted into the expected rotational speed of the first electric machine. In an embodiment, the conversion of the expected input of the input shaft of the gearbox corresponding to the shift request into the expected rotational speed of the first electric machine can be determined according to the expected input of the input shaft of the gearbox and the transmission ratio between the input shaft of the gearbox and the first electric machine, for example.

[0055] Wherein, the transmission ratio between the input shaft of the gearbox and the first electric machine can be the second transmission ratio, for example, the expected rotational speed of the first electric machine can be determined according to the expected input of the input shaft of the gearbox and the transmission ratio between the input shaft of the gearbox and the first electric machine, for example, by formula (2) as follows:

[0056] The expected rotational speed of the first electric machine = the expected input ÷ the second transmission ratio Formula (2).

[0057] As described above, the expected input can be determined according to the rotational speed of the second electric machine and the first transmission ratio. In view of this, the expected rotational speed of the first electric machine can also be determined according to the rotational speed of the second electric machine, the first transmission ratio and the second transmission ratio. In an embodiment, the expected rotational speed of the first electric machine can be determined according to the rotational speed of the second electric machine, the first transmission ratio and the second transmission ratio, for example, by formula (3) as follows:

[0058] The expected rotational speed of the first electric machine = the rotational speed of the second electric machine × the first transmission ratio ÷ the second transmission ratio Formula (3).

[0059] As described above, the shift condition can be used to identify the current actual input power of the input shaft, to determine whether the current actual input power of the input shaft of the gearbox when receiving the shift request will cause shift shock. If this shift request will cause shift shock, the auxiliary shift mode is entered, and if it will not cause shift shock, the shift operation can be performed according to the shift request. In an embodiment, the method for controlling the shift of the vehicle gearbox further comprises: in response to the current actual input power of the input shaft of the gearbox satisfying the shift condition, performing the shift operation according to the shift request.

[0060] Step S230, if the actual input power satisfies the auxiliary condition, the actual input power is adjusted according to the auxiliary shift mode.

[0061] The auxiliary shift mode can be used to identify the current actual input power of the input shaft according to the auxiliary condition, and adjust the actual input power of the input shaft of the gearbox that meets the auxiliary condition. Considering that the adjustment capability of the auxiliary shift mode may have limits in the adjustment range and / or adjustment accuracy when adjusting the actual input power that meets the auxiliary condition, the current actual input power of the input shaft of the gearbox can be identified by the auxiliary condition, and it is determined whether the current actual input power of the input shaft of the gearbox exceeds the adjustment capability of the auxiliary shift mode. If the current actual input power of the input shaft of the gearbox does not exceed the adjustment capability of the auxiliary shift mode, the current actual input power of the input shaft of the gearbox can be adjusted according to the auxiliary shift mode.

[0062] In some embodiments, the adjustment manner of the auxiliary shift mode may, for example, be adjusting the speed of the motor by controlling the motor connected to the engine end, thereby adjusting the actual input power of the input shaft of the gearbox; or, the adjustment manner of the auxiliary shift mode may also be entering the slip state of the clutch in the gearbox, so that the clutch is in the semi-coupling state of the driving gear and the driven gear relative sliding to change the speed of the engine, thereby adjusting the actual input power of the input shaft of the gearbox.

[0063] In one embodiment, adjusting the actual input power according to the auxiliary shift mode may, for example, include controlling the clutch in the gearbox to enter the slip state to adjust the actual input power of the input shaft of the gearbox. In another embodiment, in order to reduce the wear degree of the clutch and other hardware in the gearbox in the slip state, the torque of the input shaft of the gearbox drivingly connected to the clutch can also be emptied.

[0064] As described above, the auxiliary shift mode may have limits in the adjustment range and accuracy when adjusting the current actual input power of the input shaft of the gearbox. In order to ensure the effectiveness of the shift procedure and the efficiency of the shift, the auxiliary condition can be set according to the adjustment range and accuracy of the auxiliary shift mode and the current actual input power. In one embodiment, the auxiliary condition may, for example, include that the difference between the actual input power and the expected input of the gearbox corresponding to the shift request falls within a second difference range for a second preset time period, and the time length reaches a second time length threshold. The second difference range is set with reference to the following standard: the difference between the maximum value and the minimum value of the actual input power of the input shaft of the gearbox when the current actual input power is adjusted according to the auxiliary shift mode. The second preset time period can be used to ensure the instantaneousness of the shift process; and the second time length threshold can be used to provide a fluctuation space for the actual input power of the input shaft of the gearbox, which can be determined by a person skilled in the art according to the actual application, and the present application does not make any limitation in this regard.

[0065] Step S240, in the case that the actual input power of the input shaft after adjustment meets the shift condition, performing a shift operation according to the shift request.

[0066] In the embodiments of the present application, the auxiliary shift mode can also be used to identify the actual input power of the input shaft after adjustment according to the auxiliary shift mode, to perform a shift request corresponding to the actual input power meeting the shift condition. The identification of the actual input power of the input shaft after adjustment according to the auxiliary shift mode may, for example, be that, according to the shift condition, it is judged whether the actual input power of the input shaft after adjustment according to the auxiliary shift mode will cause a shift shock, and if the actual input power of the input shaft after adjustment according to the auxiliary shift mode will not cause a shift shock, a shift operation is performed according to the shift request, and the gear of the vehicle is adjusted to the gear corresponding to the shift request.

[0067] It is considered that in actual application scenarios, there may be a received shift request that is not scientific due to driver operation errors, vehicle faults or other situations, so that the shift condition cannot still be met after adjustment according to the auxiliary shift mode. In view of this, for an unscientific shift request, the shift request can be terminated. In an embodiment, the processing procedure of the auxiliary shift mode further includes: in response to the actual input power of the input shaft after adjustment according to the auxiliary shift mode not meeting the shift condition, terminating the shift request.

[0068] In some embodiments, when there is an unscientific shift request, in order to ensure the safety of vehicle driving, the method of vehicle transmission shift control provided in the embodiments of the present application can also be warned to remind the driver to drive safely. For example, the warning can be performed by displaying prompt information on the display screen, or by playing a voice, and the present application does not limit the warning method.

[0069] Compared with the mode of receiving a shift request and adjusting the speed, and then directly performing a shift operation, the present application identifies the current actual input power of the input shaft of the transmission during shifting through the shift condition, so that a shift request that may cause a shift shock or still cause a shift shock after motor speed adjustment can enter the auxiliary shift mode to avoid a shift shock. Further, the present application also identifies the current actual input power of the input shaft of the transmission during shifting through the auxiliary condition, so that a shift request meeting the auxiliary condition can complete the shift with the assistance of the auxiliary shift mode, to reduce the requirement for motor speed control, so that part of the shift request that may still cause a shift shock after motor speed adjustment can complete the shift with the assistance of the auxiliary shift mode.

[0070] In some possible implementation manners, the present application also provides a shift control device of a vehicle transmission. Figure 3 is a structural schematic diagram of the shift control device of the vehicle transmission provided in the embodiments of the present application, and reference is made toFigure 3 The shift control device 300 for the vehicle transmission provided by the embodiments of the present application comprises:

[0071] The receiving module 310 is configured to receive a shift request.

[0072] The control module 320 is configured to enter an auxiliary shift mode when the current actual input power of the input shaft of the transmission does not meet a shift condition, adjust the actual input power according to the auxiliary shift mode when the actual input power meets an auxiliary condition, and perform a shift operation according to the shift request when the adjusted actual input power meets the shift condition.

[0073] In some embodiments, the shift condition comprises a difference between the actual input power and an expected input of the transmission corresponding to the shift request, and a time length of the difference falling into a first difference range within a first preset time period reaches a first time length threshold.

[0074] In some other embodiments, the transmission comprises a clutch, and the control module 320 is further configured to control the clutch to enter a sliding friction state to adjust the actual input power.

[0075] In some other embodiments, the transmission comprises a first motor in transmission connection with the input shaft, and the actual input power comprises a current rotating speed of the first motor.

[0076] In some other embodiments, the transmission comprises a second motor in transmission connection with an output shaft of the transmission, and after receiving the shift request, the control module 320 is further configured to determine the expected input according to a rotating speed of the second motor and a transmission ratio between the input shaft and the output shaft corresponding to the shift request.

[0077] In some other embodiments, the control module 320 is further configured to perform the shift operation according to the shift request in response to the current actual input power of the input shaft of the transmission meeting the shift condition.

[0078] In some other possible implementations, the control module 320 is further configured to terminate the current shift request in response to the actual input power of the input shaft adjusted according to the auxiliary shift mode not meeting the shift condition.

[0079] In some other possible implementations, the present application further provides an electronic device for shift control of a vehicle transmission. Figure 4 FIG. 1 is a structural schematic diagram of the electronic device for shift control of the vehicle transmission provided by the embodiments of the present application, which is referred to as FIG. 1. Figure 4 The electronic device 400 for shift control of the vehicle transmission provided by the embodiments of the present application comprises:

[0080] The memory 410 has at least one program instruction for shift control of the vehicle transmission stored thereon.

[0081] The processor 420, when the above program instructions are executed by the processor 420, causes the vehicle to implement the steps of the above-described method and multiple embodiments thereof. Depending on the implementation, the processor 420 can be one or more types of processors, including but not limited to a CPU (central processing unit), a GPU (graphics processing unit), or other general purpose and / or special purpose processors, including but not limited to a DSP (digital signal processor), an ASIC (application specific integrated circuit), an FPGA (field-programmable gate array) or other programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, and the like, and the number thereof can be determined according to actual needs. Figure 2

[0082] In yet some possible implementations, the present application also provides a vehicle system for shift control of a gearbox. Figure 5 is a schematic diagram of the vehicle system for shift control of a gearbox provided by the embodiments of the present application, referring to Figure 5 The vehicle system 500 for shift control of a gearbox provided by the embodiments of the present application includes:

[0083] The gearbox 510 is configured to adjust the gear of the vehicle.

[0084] The controller 520 is in communication connection with the gearbox 510, and is configured to perform the steps of the above-described method and multiple embodiments thereof to perform shift control on the gearbox 510. Figure 2

[0085] In some embodiments, the vehicle system 500 for shift control of a gearbox further includes an engine 530 and a wheel end 540. The engine 530 can be configured to provide power to the vehicle as a first power source of the vehicle, the wheel end 540 can be configured to convert the power provided by the engine 530 into linear motion of the vehicle to push the vehicle forward or backward, and the gearbox 510 can be further configured to disconnect or connect the power transmission between the engine 530 and the wheel end 540.

[0086] ​​In some embodiments, the gearbox 510 includes an input shaft connected to the engine 530 and an output shaft connected to the wheel end 540. When the power transmission between the engine 530 and the wheel end 540 is connected, the power output by the engine 530 can be input into the gearbox 510 through the input shaft and transmitted to the wheel end 540 through the output shaft to drive the vehicle.

[0087] In some embodiments, the transmission 510 further includes a first motor driven through the input shaft of the transmission and a second motor driven through the output shaft of the transmission. The first motor can be used to regulate the speed of the engine 530, and the second motor can be used as a second power source to provide power to the vehicle.

[0088] In some embodiments, the transmission 510 further includes a clutch, which can disconnect or connect the power transmission between the engine 530 and the wheel end 540 to perform operations such as shifting gears, changing speed, and / or changing the vehicle drive mode (e.g., driving the vehicle by the engine 530, driving the vehicle by the second motor, or driving the vehicle by both the engine 530 and the second motor).

[0089] In some other possible implementations, this application also provides a computer program (product) comprising computer programs / instructions, which are executed by a processor to cause the computer to perform the above-described combination. Figure 2 The steps of the described method and its various embodiments.

[0090] In some other possible implementations, this application also provides a computer-readable storage medium storing program instructions for vehicle transmission shift control, which, when executed by one or more processors, implement the above-mentioned combination. Figure 2 The steps of the described method and its various embodiments are described. The computer-readable storage medium can be a readable signal medium or a readable storage medium. A readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof.

[0091] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0092] The term "and / or" in the embodiments of the present application only describes the association relationship of the associated objects, and indicates that there can be three relationships, for example, A and / or B can represent the three cases of A existing alone, A and B existing together, and B existing alone.

[0093] The above is only to facilitate those skilled in the art to understand the technical solutions of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the principles of the present application shall be included in the protection scope of the present application.

Claims

1. A shift control method of a vehicle transmission, characterized by, The method comprises: receiving a shift request; in a case where an actual input power of an input shaft of the gearbox does not meet a shift condition, entering an auxiliary shift mode; in a case where the actual input power meets an auxiliary condition, adjusting the actual input power according to the auxiliary shift mode; in a case where the adjusted actual input power meets the shift condition, performing a shift operation according to the shift request; the shift condition comprises a difference between the actual input power and an expected input of the gearbox corresponding to the shift request, and a time length of the difference falling into a first difference range within a first preset time period reaches a first time length threshold; the auxiliary condition comprises a difference between the actual input power and the expected input of the gearbox corresponding to the shift request, and a time length of the difference falling into a second difference range within a second preset time period reaches a second time length threshold; the gearbox comprises a clutch, and the adjusting the actual input power according to the auxiliary shift mode comprises: controlling the clutch to enter a slip state to adjust the actual input power; the gearbox comprises a first motor in transmission connection with the input shaft, and the actual input power comprises a current rotating speed of the first motor; the gearbox comprises a second motor in transmission connection with an output shaft of the gearbox, and after the receiving the shift request, the method further comprises: determining the expected input according to a rotating speed of the second motor and a transmission ratio between the input shaft and the output shaft corresponding to the shift request.

2. The method of claim 1, wherein, The shift control method of the vehicle gearbox further comprises: in response to the actual input power of the input shaft of the gearbox meeting the shift condition, performing the shift operation according to the shift request.

3. The method of claim 1, wherein, the entering the auxiliary shift mode further comprises: in response to the actual input power of the input shaft adjusted according to the auxiliary shift mode not meeting the shift condition, terminating the current shift request.

4. A shift control device of a vehicle transmission, characterized by comprising: The method comprises: a receiving module configured to receive a shift request; a control module configured to, in a case where an actual input power of an input shaft of the gearbox does not meet a shift condition, enter an auxiliary shift mode; and in a case where the actual input power meets an auxiliary condition, adjust the actual input power according to the auxiliary shift mode; and the control module is further configured to, in a case where the adjusted actual input power meets the shift condition, perform a shift operation according to the shift request; the shift condition comprises a difference between the actual input power and an expected input of the gearbox corresponding to the shift request, and a time length of the difference falling into a first difference range within a first preset time period reaches a first time length threshold; the auxiliary condition comprises a difference between the actual input power and the expected input of the gearbox corresponding to the shift request, and a time length of the difference falling into a second difference range within a second preset time period reaches a second time length threshold; the gearbox comprises a clutch, and the control module is further configured to control the clutch to enter a slip state to adjust the actual input power; the gearbox comprises a first motor in transmission connection with the input shaft, and the actual input power comprises a current rotating speed of the first motor; The gearbox comprises a second motor in driving connection with an output shaft of the gearbox, and the control module is further configured to determine the expected input according to a rotational speed of the second motor and a transmission ratio between the input shaft and the output shaft corresponding to the shift request. The control module is further configured to perform a shift operation according to the shift request in response to the actual input power of the input shaft of the gearbox satisfying a shift condition.

5. A vehicle system for shift control of a gearbox, characterized in that The gearbox comprises: a gearbox configured to adjust a gear of a vehicle; a controller in communication connection with the gearbox and configured to perform the method of any one of claims 1-3 to control the gearbox to shift gears. The gearbox comprises: a gearbox configured to adjust a gear of a vehicle; a controller in communication connection with the gearbox and configured to perform the method of any one of claims 1-3 to control the gearbox to shift gears.

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