Vehicle gearbox control method, device, vehicle and storage medium

Abstract

The present invention relates to the field of automobile technology, and in particular to a control method, device, vehicle and storage medium for a vehicle gearbox, wherein the control method for the vehicle gearbox comprises the following steps: obtaining the actual moment of inertia between the engine and / or drive motor of the vehicle and the gearbox; simulating the torque loss based on the actual moment of inertia, and calculating the current torque loss value between the engine and / or drive motor and the gearbox; calculating the current torque capacity of the gearbox according to the current maximum torque and current torque loss value of the gearbox, and controlling the transmission ratio and / or movement direction of the gearbox under the constraint of the current torque capacity. The method can give full play to the power performance of the vehicle and improve the power performance of the vehicle while avoiding excessive torque transmitted to the gearbox that causes damage to the gearbox.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a control method and device for a vehicle gearbox, a vehicle and a storage medium. Background Art

[0002] The torque capacity of the gearbox is an important parameter that identifies the vehicle's dynamic performance. It is used to limit the output torque of the engine and / or drive motor. When the torque capacity is set too large, the engine and / or drive motor can usually output a larger torque, which makes it easy to exceed the maximum torque of the gearbox when transmitted to the gearbox, causing damage to the gearbox; when the torque capacity is set too small, the engine and / or drive motor usually outputs a smaller torque, which can easily lead to insufficient power for the vehicle. Therefore, it is necessary to reasonably set the torque capacity of the gearbox.

[0003] In the related art, the maximum torque of a gearbox is usually taken as the torque capacity of the gearbox, so as to maximize the balance between the vehicle's power and the risk of gearbox damage.

[0004] However, although the maximum torque of the gearbox as the torque capacity of the gearbox can effectively reduce or avoid the risk of gearbox damage, there is a torque loss between the engine and / or drive motor and the gearbox. When the maximum torque is used to limit the output torque of the engine and / or drive motor, the torque transmitted to the gearbox cannot reach the maximum torque of the gearbox, thereby failing to fully exert the power performance of the vehicle. Summary of the invention

[0005] In view of this, the present invention aims to propose a control method for a vehicle gearbox, which can fully exert the power performance of the vehicle and improve the power of the vehicle while avoiding excessive torque transmitted to the gearbox that may cause damage to the gearbox.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A method for controlling a vehicle transmission comprises the following steps:

[0008] Obtaining the actual moment of inertia between the engine and / or drive motor and the gearbox of the vehicle;

[0009] Simulating torque loss based on the actual moment of inertia to calculate a current torque loss value between the engine and / or the drive motor and the gearbox;

[0010] The current torque capacity of the gearbox is calculated according to the current maximum torque of the gearbox and the current torque loss value, and the transmission ratio and / or movement direction of the gearbox is controlled under the constraint of the current torque capacity.

[0011] Further, the controlling the transmission ratio and / or movement direction of the gearbox under the constraint of the current torque capacity includes:

[0012] determining whether the actual torque of the torque converter is greater than or equal to the current torque capacity;

[0013] If the actual torque is greater than or equal to the current torque capacity, excess torque obtained by the difference between the actual torque and the current torque capacity is absorbed, and the transmission ratio and / or movement direction of the gearbox is controlled with the current torque capacity; otherwise, the transmission ratio and / or movement direction of the gearbox is controlled according to the actual torque.

[0014] Further, the calculating the current torque capacity of the gearbox according to the current maximum torque of the gearbox and the current torque loss value includes:

[0015] Obtaining a torque ratio of the torque converter;

[0016] The current torque capacity is calculated based on the current maximum torque, the torque loss value, and the torque ratio of the torque converter.

[0017] Further, the simulating the torque loss based on the actual moment of inertia to calculate the current torque loss value between the engine and / or the drive motor and the gearbox includes:

[0018] Acquiring the actual speed of the engine and / or the drive motor, and performing time differentiation on the actual speed to obtain an integral result;

[0019] The current torque loss value is calculated according to the integration result and the rotational inertia.

[0020] Furthermore, before calculating the current torque capacity of the gearbox, the method further includes:

[0021] identifying a current gear position of the transmission;

[0022] The current maximum torque of the gearbox is obtained according to the maximum torque of the current gear.

[0023] Compared with the prior art, the vehicle transmission control method of the present invention has the following advantages:

[0024] The control method of the vehicle transmission described in the present invention fully considers the torque loss in the torque transmission process when calculating the torque capacity of the transmission, so that the torque transmitted to the transmission can reach and not exceed the maximum torque of the transmission. This can avoid excessive torque transmitted to the transmission and cause damage to the transmission, while fully exerting the power performance of the vehicle and improving the power of the vehicle.

[0025] The second object of the present invention is to provide a control device for a vehicle gearbox, which can fully exert the power performance of the vehicle and improve the power of the vehicle while avoiding excessive torque transmitted to the gearbox that may cause damage to the gearbox.

[0026] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0027] A control device for a vehicle gearbox, comprising:

[0028] An acquisition module, used for acquiring an actual moment of inertia between an engine and / or a drive motor and a gearbox of a vehicle;

[0029] a simulation module, configured to simulate the torque loss based on the actual moment of inertia, calculate a current torque loss value between the engine and / or the drive motor and the gearbox, and calculate a current torque capacity of the gearbox according to a current maximum torque of the gearbox and the current torque loss value;

[0030] A control module is used to control the transmission ratio and / or the movement direction of the gearbox under the constraint of the current torque capacity.

[0031] Furthermore, the control module is further used to determine whether the actual torque of the torque converter is greater than or equal to the current torque capacity. When the actual torque is greater than or equal to the current torque capacity, the control module absorbs excess torque obtained by the difference between the actual torque and the current torque capacity, and controls the transmission ratio and / or movement direction of the gearbox with the current torque capacity; otherwise, the transmission ratio and / or movement direction of the gearbox is controlled according to the actual torque.

[0032] Furthermore, the simulation module is further used to obtain the torque ratio of the torque converter, and calculate the current torque capacity according to the current maximum torque, the torque loss value and the torque ratio of the torque converter.

[0033] Furthermore, the simulation module is further used to obtain the actual rotational speed of the engine and / or drive motor, and to perform time differentiation on the actual rotational speed to obtain an integral result, and to calculate the current torque loss value based on the integral result and the moment of inertia.

[0034] Furthermore, it also includes: an identification module, which is used to identify the current gear of the gearbox before calculating the current torque capacity of the gearbox, and obtain the current maximum torque of the gearbox according to the maximum torque of the current gear.

[0035] The advantages of the gearbox control method and the gearbox control device described above over the prior art are the same, and will not be described in detail here.

[0036] The third object of the present invention is to provide a vehicle that can fully exert the power performance of the vehicle and improve the power of the vehicle while avoiding excessive torque transmitted to the gearbox that may cause damage to the gearbox.

[0037] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0038] A vehicle comprises: a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the control method of a transmission as described in the above embodiment.

[0039] The advantages of the vehicle and the control method of the gearbox described above over the prior art are the same and will not be described in detail here.

[0040] The fourth object of the present invention is to provide a computer-readable storage medium that can fully exert the power performance of the vehicle and improve the power of the vehicle while avoiding excessive torque transmitted to the gearbox that may cause damage to the gearbox.

[0041] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0042] A computer-readable storage medium stores a computer program, which is executed by a processor to implement the control method of the transmission as described in the above embodiment.

[0043] The computer-readable storage medium and the above-mentioned gearbox control method have the same advantages over the prior art, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0045] Figure 1 A flow chart of a method for controlling a vehicle transmission according to an embodiment of the present invention;

[0046] Figure 2 A flow chart of a method for controlling a vehicle transmission according to an embodiment of the present invention;

[0047] Figure 3 This is an example diagram of a whole vehicle simulation model according to an embodiment of the present invention;

[0048] Figure 4 A comparison diagram of dynamic simulation results according to an embodiment of the present invention;

[0049] Figure 5 A block diagram of a control device for a vehicle transmission according to an embodiment of the present invention;

[0050] Figure 6 The figure is a schematic diagram of the vehicle structure according to an embodiment of the present invention.

[0051] Description of reference numerals:

[0052] Engine 1, flange 2, torque converter 3, gearbox 4, transfer case 5, final reducer 6, final reducer 7, differential 8, brake 9, right front wheel 10, brake 11, left front wheel 12, differential 13, brake 14, right rear wheel 15, brake 16, left rear wheel 17. DETAILED DESCRIPTION

[0053] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0054] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0055] As engine performance continues to improve, engines usually provide greater torque, and the torque amplified by the torque converter and transmitted to the gearbox usually exceeds the maximum torque of the gearbox, causing damage to the gearbox; in addition, with the emergence of hybrid vehicles, the engine torque plus the motor torque jointly output torque, and the torque transmitted to the gearbox is more likely to exceed the maximum torque of the gearbox, causing damage to the gearbox.

[0056] Therefore, in the related art, the torque capacity of the gearbox is usually set to limit the output torque of the engine and / or the drive motor to avoid excessive torque when transmitted to the gearbox. Among them, the control method of the gearbox torque capacity usually considers the maximum torque of the gearbox itself, and takes the maximum torque of the gearbox itself as the gearbox torque capacity. However, the control method of the gearbox torque capacity in the related art only considers the maximum torque of the gearbox itself, and ignores the torque loss caused by the rotational inertia of the relevant components between the power source such as the engine and / or the drive motor and the gearbox input shaft, so that the torque transmitted to the gearbox usually cannot reach the maximum torque of the gearbox, and the power performance of the vehicle cannot be fully utilized.

[0057] To this end, in the control method of the vehicle transmission proposed in the embodiment of the present invention, a more reasonable torque capacity setting method is used, which can fully consider the torque loss when setting the torque capacity, so that the torque transmitted to the transmission can reach and not exceed the maximum torque of the transmission, thereby avoiding excessive torque transmitted to the transmission and causing damage to the transmission, while fully exerting the vehicle's power performance and improving the vehicle's power.

[0058] Figure 1 is a flow chart of a method for controlling a vehicle transmission according to an embodiment of the present invention.

[0059] like Figure 1 As shown, the control method of the vehicle transmission according to the embodiment of the present invention comprises the following steps:

[0060] Step S101, obtaining the actual moment of inertia between the engine and / or the drive motor and the gearbox of the vehicle.

[0061] It is understandable that due to the rotational inertia of related components between the engine and / or drive motor and the gearbox, torque loss is prone to occur in the process of transmitting torque to the gearbox. The embodiment of the present invention fully considers the torque loss in the torque transmission process when calculating the torque capacity of the gearbox. Therefore, it is necessary to first obtain the actual rotational inertia between the engine and / or drive motor and the gearbox.

[0062] Among them, the moment of inertia can be specifically calibrated according to the relevant components between the engine and / or drive motor and the gearbox. The calibration can be pre-calibrated through experiments before the vehicle is used. When it is used specifically, the moment of inertia of the relevant components can be directly obtained. Therefore, after determining the relevant components, the actual moment of inertia between the engine and / or drive motor and the gearbox is obtained.

[0063] Specifically, when the vehicle is a fuel vehicle, the present invention can be implemented to calibrate the moment of inertia based on the engine crankshaft, dual-mass flywheel, torque converter turbine and torque converter pump wheel and other related components; when the vehicle is a hybrid vehicle, the present invention can be implemented to calibrate the moment of inertia based on the engine crankshaft, dual-mass flywheel, torque converter turbine and torque converter pump wheel, motor rotor, K0 clutch and other related components; when the vehicle is an electric vehicle, the present invention can be implemented to calibrate the moment of inertia based on the motor rotor, dual-mass flywheel, torque converter turbine and torque converter pump wheel and other related components.

[0064] Step S102 , simulating the torque loss based on the actual rotational inertia, and calculating the current torque loss value between the engine and / or the drive motor and the gearbox.

[0065] It can be understood that the embodiments of the present invention can quickly and accurately calculate the current torque loss value corresponding to the actual rotational inertia through simulation, thereby effectively improving the accuracy of the torque loss value calculation, reducing the calculation delay, and improving the real-time performance of vehicle control.

[0066] Among them, the embodiment of the present invention can adopt a variety of simulation methods, and all methods that can simulate the torque loss based on the actual rotational inertia can be used, and there is no specific limitation on this.

[0067] As a possible implementation method, the embodiment of the present invention can be simulated using the Simulink module of Matlab software, including: establishing a control program for the rotational inertia loss of related components from the power source to the gearbox input shaft in the Simulink module of Matlab software, the control program is as follows: Figure 2 As shown, it can be set as Figure 3 The torque capacity interface module is shown in the figure, and the torque capacity interface module is selected to interface with the Cruise software to control the Figure 3 The whole vehicle simulation model in the Cruise software shown in the figure is used for simulation calculation, wherein the whole vehicle simulation model takes a fuel vehicle model as an example, and the power source is the engine; the whole vehicle simulation model file path and calculation task sequence number are set in the torque capacity interface module, and the whole vehicle simulation model in the Cruise software can be called through Simulink, and the input signal in the control program of the moment of inertia loss can be obtained from Cruise, and the output signal can be sent to Cruise.

[0068] In this embodiment, the torque loss is simulated based on the actual rotational inertia to calculate the current torque loss value between the engine and / or the drive motor and the gearbox, including: obtaining the actual speed of the engine and / or the drive motor, and differentiating the actual speed with time to obtain an integral result; and calculating the current torque loss value based on the integral result and the rotational inertia.

[0069] The embodiment of the present invention can utilize Figure 2 The control program shown calculates, Figure 2 The input end refers to the engine and / or drive motor. The actual speed is converted into units to obtain u, u = actual speed * 2 * π / 60, and u is differentiated by time to obtain , and then according to the moment of inertia, such as 0.183 and The product of gets the current torque loss value.

[0070] Step S103, calculating the current torque capacity of the gearbox according to the current maximum torque and the current torque loss value of the gearbox, and controlling the transmission ratio and / or movement direction of the gearbox under the constraint of the current torque capacity.

[0071] Among them, the current torque capacity of the gearbox is usually equal to the current maximum torque of the torque converter input shaft, which is used to limit the maximum torque of the gearbox input shaft. The constraint of the current torque capacity can effectively prevent the torque after the torque ratio of the torque converter from exceeding the current maximum torque of the gearbox, thereby avoiding the risk of gearbox damage.

[0072] It can be understood that the embodiments of the present invention can fully consider the torque loss in the torque transmission process when setting the torque capacity, so that the actual torque of the gearbox can reach the maximum torque of the gearbox, so as to give full play to the maximum power performance of the vehicle and effectively improve the power performance of the vehicle.

[0073] In this embodiment, the current torque capacity of the transmission is calculated based on the current maximum torque and the current torque loss value of the transmission, including: obtaining the torque ratio of the torque converter; calculating the current torque capacity based on the current maximum torque, the torque loss value and the torque ratio of the torque converter.

[0074] In specific implementation, the embodiment of the present invention can use Figure 2 The control program shown automatically calculates the current torque capacity, and the calculation formula of the current torque capacity is: current torque capacity = (current maximum torque + torque loss value) / torque ratio.

[0075] In this embodiment, before calculating the current torque capacity of the gearbox, the method further includes: identifying the current gear position of the gearbox; and obtaining the current maximum torque of the gearbox according to the maximum torque of the current gear position.

[0076] It is understandable that since different gears of the gearbox correspond to different maximum torques, for example, the maximum torques corresponding to gears 1 / 2 / 3 of the gearbox input shaft are 500 / 600 / 600Nm respectively, the embodiment of the present invention calculates the torque capacity by combining the maximum torques of different gears, and can accurately calculate the torque capacity corresponding to each gear, and refine the gearbox control method based on torque capacity, so that the vehicle can fully exert its power performance in each gear, thereby effectively improving the power performance of the vehicle.

[0077] For example, the maximum torque values ​​of the 1 / 2 / 3 gear positions of the transmission input shaft can be 500 / 600 / 600Nm respectively. The control method that does not consider the torque loss caused by the moment of inertia is: the maximum torque value of the transmission is divided by the torque ratio of the torque converter as the torque capacity of the transmission, and the transmission is controlled in this way. However, due to the torque loss caused by the moment of inertia of related components, the torque transmitted to the transmission input shaft becomes smaller, and the vehicle's dynamic performance cannot be fully utilized. The control method of the embodiment of the present invention fully considers the torque loss caused by the moment of inertia, and the maximum torque of each gear plus the torque loss is divided by the torque ratio of the torque converter as the torque capacity. At this time, it can be ensured that the maximum torque transmitted to the transmission can reach the maximum torque designed for the transmission. The dynamic simulation comparison results are shown as follows: Figure 4As shown, curve 1 is a curve of the control method of the embodiment of the present invention taking into account the torque loss caused by the moment of inertia when simulating the 100 km / h acceleration performance, and curve 2 is a curve of the control method in the related art that does not take into account the torque loss caused by the moment of inertia when simulating the 100 km / h acceleration performance. The control method of the embodiment of the present invention is superior to the control method of the related art.

[0078] In this embodiment, under the constraint of the current torque capacity, the transmission ratio and / or movement direction of the transmission is controlled, including: determining whether the actual torque of the torque converter is greater than or equal to the current torque capacity; if the actual torque is greater than or equal to the current torque capacity, absorbing excess torque obtained by the difference between the actual torque and the current torque capacity, and controlling the transmission ratio and / or movement direction of the transmission with the current torque capacity; otherwise, controlling the transmission ratio and / or movement direction of the transmission according to the actual torque.

[0079] It is understandable that the embodiment of the present invention can absorb excess torque when the actual torque of the torque converter input shaft is greater than the calculated torque capacity, so that the torque transmitted to the gearbox does not exceed the maximum torque of the gearbox, effectively avoiding damage to the gearbox due to excessive torque transmitted to the gearbox. The actual torque of the torque converter input shaft is the actual output torque of the engine and / or the drive motor; the embodiment of the present invention can absorb excess torque in a variety of ways, such as flanges, etc., which are not specifically limited.

[0080] According to the control method of the vehicle transmission in the embodiment of the present invention, the torque loss in the torque transmission process is fully considered when calculating the torque capacity of the transmission, so that the torque transmitted to the transmission can reach and not exceed the maximum torque of the transmission. This can avoid excessive torque transmitted to the transmission and cause damage to the transmission, while fully exerting the power performance of the vehicle and improving the power of the vehicle.

[0081] The following will Figure 3 Taking the vehicle simulation model shown in the figure as an example, the control method of the vehicle gearbox is further explained. Figure 3 As shown, the vehicle simulation model includes an engine 1, a flange 2, a torque converter 3, a gearbox 4, a transfer case 5, a main reducer 6, a main reducer 7, a differential 8, a brake 9, a right front wheel 10, a brake 11, a left front wheel 12, a differential 13, a brake 14, a right rear wheel 15, a brake 16, and a left rear wheel 17. The specific process is as follows:

[0082] (1) A control program for the moment of inertia loss of related components from the power source to the gearbox input shaft is established in the Simulink module of Matlab software. The control program is as follows: Figure 2As shown, select CRUISE Interface (i.e. torque capacity interface module) and Cruise software to interface to control Figure 3 The vehicle simulation model in the Cruise software shown in the figure is used for simulation calculation. In the torque capacity interface module, the vehicle simulation model file path and calculation task sequence number are set. The vehicle simulation model in the Cruise software can be called through Simulink. The input signal in the control program of the moment of inertia loss can be obtained from Cruise and the output signal can be sent to Cruise. The process of the control program calculating the torque capacity is as follows:

[0083] a. Identify and calculate the torque loss caused by the rotational inertia of the components from the engine to the transmission input shaft. The rotational inertia loss includes the torque loss of the engine crankshaft, dual-mass flywheel, torque converter turbine and torque converter pump wheel;

[0084] b. Transmission torque capacity, i.e. the maximum torque of the torque converter input shaft. The calculation process is the maximum torque of the transmission plus the rotational inertia loss of related components divided by the torque ratio of the torque converter.

[0085] c. Since the maximum torque of different gears of the gearbox is different, gear limit conditions are added to the control program. Figure 2 Take 1st gear and 2nd gear as an example.

[0086] (2) Create the following in AVLCruise software: Figure 3 The vehicle simulation model 1 shown, Figure 2 and Figure 3 The torque capacity interface module in is the same module, such as Figure 2 As shown, four input signals are established in the torque capacity interface module, namely the current gearbox gear signal, speed signal, torque ratio signal and engine torque signal. These input signals are obtained from Cruise, and an output signal is established as the flange absorption torque signal. Among them, the bus connection order is:

[0087] The gearbox generates a current gearbox gear position signal according to the current gearbox gear position, and inputs the forward gearbox gear position signal to the torque capacity interface module;

[0088] The engine generates an input end speed signal according to the engine speed, and inputs the input end speed signal to the torque capacity interface module;

[0089] The hydraulic torque converter generates a torque ratio signal according to the torque ratio, and inputs the torque ratio signal to the torque capacity interface module;

[0090] The engine generates an input end torque signal according to the torque of the torque converter input shaft and the flange torque, and inputs the input end torque signal to the torque capacity interface module;

[0091] The torque capacity interface module outputs an absorption torque signal to the flange, and the flange absorbs excess torque output by the engine according to the absorption torque signal.

[0092] (3) The Simulink logic control program realizes the function of joint simulation through signal connection with the Cruise interface module.

[0093] (4) When the torque at the input end of the torque converter is greater than the calculated torque capacity limit, the flange is used to absorb the excess torque to prevent the gearbox from being damaged due to being unable to withstand the excessive torque, thereby achieving the purpose of protecting the gearbox; when the torque at the input end of the torque converter is less than the calculated torque capacity limit, the torque of the gearbox input shaft does not exceed the maximum torque of the gearbox, and the torque absorbed by the flange is 0.

[0094] Therefore, the embodiment of the present invention can avoid excessive torque transmitted to the gearbox, which may cause damage to the gearbox, while fully exerting the power performance of the vehicle and improving the power of the vehicle.

[0095] It should be noted that the method of the above embodiment can also be applied to the design stage of the vehicle, which can effectively improve the simulation results of the dynamic performance of the whole vehicle, avoid excessive requirements on mechanical parts during design, cause over-design, and increase design costs.

[0096] Furthermore, if Figure 5 As shown, the embodiment of the present invention further discloses a control device 100 for a vehicle transmission, which includes: an acquisition module 110 , a simulation module 120 and a control module 130 .

[0097] Specifically, if Figure 5 As shown, the acquisition module 110 is used to obtain the actual rotational inertia between the engine and / or drive motor and the gearbox of the vehicle; the simulation module 120 is used to simulate the torque loss based on the actual rotational inertia, calculate the current torque loss value between the engine and / or drive motor and the gearbox, and calculate the current torque capacity of the gearbox according to the current maximum torque and the current torque loss value of the gearbox; the control module 130 is used to control the transmission ratio and / or movement direction of the gearbox under the constraint of the current torque capacity.

[0098] Furthermore, the control module 130 is further used to determine whether the actual torque of the torque converter is greater than or equal to the current torque capacity. When the actual torque is greater than or equal to the current torque capacity, the control module 130 absorbs excess torque obtained by the difference between the actual torque and the current torque capacity, and controls the transmission ratio and / or movement direction of the transmission with the current torque capacity; otherwise, the transmission ratio and / or movement direction of the transmission is controlled according to the actual torque.

[0099] Furthermore, the simulation module 120 is further used to obtain the torque ratio of the torque converter, and calculate the current torque capacity according to the current maximum torque, the torque loss value and the torque ratio of the torque converter.

[0100] Furthermore, the simulation module 120 is further used to obtain the actual speed of the engine and / or the drive motor, and perform time differentiation on the actual speed to obtain an integral result, and calculate the current torque loss value based on the integral result and the moment of inertia.

[0101] Furthermore, the device 10 of the embodiment of the present invention further includes: an identification module, wherein the identification module is used to identify the current gear of the gearbox before calculating the current torque capacity of the gearbox, and obtain the current maximum torque of the gearbox according to the maximum torque of the current gear.

[0102] It should be noted that the specific implementation of the control device of the vehicle transmission in the embodiment of the present invention is similar to the specific implementation of the control method of the vehicle transmission, and will not be described herein in order to reduce redundancy.

[0103] According to the control device of the vehicle transmission in the embodiment of the present invention, the torque loss in the torque transmission process is fully considered when calculating the torque capacity of the transmission, so that the torque transmitted to the transmission can reach and not exceed the maximum torque of the transmission. This can avoid the transmission being damaged due to excessive torque transmitted to the transmission while fully exerting the power performance of the vehicle and improving the power of the vehicle.

[0104] Furthermore, an embodiment of the present invention discloses a vehicle, such as Figure 6 As shown, the vehicle may include:

[0105] A memory 601 , a processor 602 , and a computer program stored in the memory 601 and executable on the processor 602 .

[0106] When the processor 602 executes the program, the control method of the gearbox provided in the above embodiment is implemented.

[0107] In this way, the vehicle can fully exert the vehicle's power performance and improve the vehicle's power while avoiding excessive torque transmitted to the gearbox which may cause damage to the gearbox.

[0108] Furthermore, the vehicle also includes:

[0109] The communication interface 603 is used for communication between the memory 601 and the processor 602 .

[0110] The memory 601 is used to store computer programs that can be executed on the processor 602 .

[0111] The memory 601 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0112] If the memory 601, the processor 602 and the communication interface 603 are implemented independently, the communication interface 603, the memory 601 and the processor 602 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 6 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0113] Optionally, in a specific implementation, if the memory 601, the processor 602 and the communication interface 603 are integrated on a chip, the memory 601, the processor 602 and the communication interface 603 can communicate with each other through an internal interface.

[0114] The processor 602 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention.

[0115] Furthermore, an embodiment of the present invention discloses a computer-readable storage medium on which a computer program is stored, and the program is executed by a processor to implement the control method of the gearbox as described in the above embodiment. The storage medium can fully exert the power performance of the vehicle and improve the power performance of the vehicle while avoiding excessive torque transmitted to the gearbox that may cause damage to the gearbox.

[0116] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for controlling a vehicle transmission, characterized in that: The following steps are involved: Obtaining the actual moment of inertia between the engine and / or drive motor and the gearbox of the vehicle; Simulating torque loss based on the actual moment of inertia to calculate a current torque loss value between the engine and / or the drive motor and the gearbox; as well as The current torque capacity of the gearbox is calculated according to the current maximum torque of the gearbox and the current torque loss value, and the transmission ratio and / or movement direction of the gearbox is controlled under the constraint of the current torque capacity, wherein the current torque capacity of the gearbox is calculated according to the current maximum torque of the gearbox and the current torque loss value, including: obtaining the torque ratio of the torque converter; The current torque capacity is calculated based on the current maximum torque, the torque loss value, and the torque ratio of the torque converter.

2. The method according to claim 1, characterized in that The controlling the transmission ratio and / or the movement direction of the gearbox under the constraint of the current torque capacity comprises: determining whether the actual torque of the torque converter is greater than or equal to the current torque capacity; If the actual torque is greater than or equal to the current torque capacity, excess torque obtained by the difference between the actual torque and the current torque capacity is absorbed, and the transmission ratio and / or movement direction of the gearbox is controlled with the current torque capacity; otherwise, the transmission ratio and / or movement direction of the gearbox is controlled according to the actual torque.

3. The method according to claim 1, characterized in that The simulating the torque loss based on the actual moment of inertia to calculate the current torque loss value between the engine and / or the drive motor and the gearbox includes: Acquiring the actual speed of the engine and / or the drive motor, and performing time differentiation on the actual speed to obtain an integral result; The current torque loss value is calculated according to the integration result and the rotational inertia.

4. The method according to claim 1, characterized in that Before calculating the current torque capacity of the gearbox, it also includes: identifying a current gear position of the transmission; The current maximum torque of the gearbox is obtained according to the maximum torque of the current gear.

5. A control device for a vehicle transmission, characterized in that: include: An acquisition module, used for acquiring an actual moment of inertia between an engine and / or a drive motor and a gearbox of a vehicle; a simulation module, configured to simulate the torque loss based on the actual moment of inertia, calculate a current torque loss value between the engine and / or the drive motor and the gearbox, and calculate a current torque capacity of the gearbox according to a current maximum torque of the gearbox and the current torque loss value; The simulation module is further used to obtain a torque ratio of the torque converter, and calculate the current torque capacity according to the current maximum torque, the torque loss value and the torque ratio of the torque converter; A control module is used to control the transmission ratio and / or the movement direction of the gearbox under the constraint of the current torque capacity.

6. The device according to claim 5, characterized in that The control module is further used to determine whether the actual torque of the torque converter is greater than or equal to the current torque capacity, and when the actual torque is greater than or equal to the current torque capacity, absorb excess torque obtained by the difference between the actual torque and the current torque capacity, and control the transmission ratio and / or movement direction of the transmission with the current torque capacity, otherwise control the transmission ratio and / or movement direction of the transmission according to the actual torque; The simulation module is further used to obtain the actual rotational speed of the engine and / or the drive motor, and perform time differentiation on the actual rotational speed to obtain an integral result, and calculate the current torque loss value based on the integral result and the moment of inertia.

7. The device according to claim 5, characterized in that Also includes: The identification module is used to identify the current gear of the transmission before calculating the current torque capacity of the transmission, and obtain the current maximum torque of the transmission according to the maximum torque of the current gear.

8. A vehicle, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the control method of the gearbox according to any one of claims 1 to 4.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the control method of the gearbox as described in any one of claims 1 to 4.

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