Vehicle shift torque control method and device, vehicle, medium, and program

Abstract

The invention relates to the technical field of vehicles, in particular to a vehicle gear shifting torque control method and device, a vehicle, a medium and a program.The method comprises the steps that whether a gear shifting torque reduction flag bit of the vehicle is in an activated state or not is judged; if the gear shifting torque reduction flag bit is in the activated state, the maximum torque reduction value of the driving system is obtained, and a target torque reduction value is determined according to the current torque reduction requirement; if the target torque reduction value is larger than the maximum torque reduction value of the driving system, the difference value between the target torque reduction value and the maximum torque reduction value of the driving system is calculated, gear shifting speed regulation time and gear shifting control parameters are matched according to the difference value of the maximum torque reduction value of the driving system, and torque reduction control is conducted according to the gear shifting speed regulation time and the gear shifting control parameters. Therefore, the torque reduction requests during gear shifting of the transmission are reasonably distributed to the motor and the engine, the problems of poor gear shifting torque reduction quality, gear shifting impact and the like caused by insufficient battery charging capacity are solved, and it is ensured that good gear shifting quality can be achieved under any working condition.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a vehicle shift torque control method, device, vehicle, medium and program. Background Art

[0002] Under the current automotive industry and market background, hybrid vehicles have become the mainstream development direction, and the configuration of hybrid power has also tended to be diversified, including dual-motor configuration, extended-range configuration and single-motor P2 configuration.

[0003] In the related technology, in the P2 configuration, during the gear shifting process, the motor can provide additional torque when the engine torque decreases to fill the torque gap and reduce the sense of frustration; the motor can adjust its speed during the gear shifting process to match the speed required for the target gear; through the motor's rapid response capability, the gear shifting time can be shortened and the gear shifting shock can be reduced.

[0004] However, since the motor in the P2 configuration is connected to the engine through a clutch, it is necessary to manage the working states of the engine, motor and clutch at the same time. Since the actions of multiple components need to be coordinated, the response time of the P2 configuration during the gear shifting process is longer than that of traditional fuel vehicles, affecting the vehicle's power response speed. At the same time, the gear shifting control strategy is not optimized enough. P2 configuration vehicles may experience obvious speed fluctuations during the gear shifting process, resulting in an uneven driving experience, which needs to be solved urgently. Summary of the invention

[0005] The present application provides a vehicle shift torque control method, device, vehicle, medium and program to solve the problems of poor shift torque reduction quality caused by insufficient battery charging capacity, resulting in shift shock, etc., to ensure good shift quality under any working conditions.

[0006] A first aspect of the present application provides a vehicle shift torque control method, comprising the following steps:

[0007] Determine whether the gear shift torque reduction flag of the vehicle is in an activated state;

[0008] If the gear shift torque reduction flag is in the activated state, the maximum torque reduction value of the drive system is obtained, and a target torque reduction value is determined according to the current torque reduction demand;

[0009] If the target torque reduction value is greater than the maximum torque reduction value of the drive system, the difference between the target torque reduction value and the maximum torque reduction value of the drive system is calculated, and the gear shifting speed regulation time and the gear shifting control parameters are matched according to the difference between the maximum torque reduction value of the drive system and the difference, and the torque reduction control is performed according to the gear shifting speed regulation time and the gear shifting control parameters.

[0010] Optionally, obtaining the maximum torque reduction value of the drive system includes:

[0011] Obtain the maximum torque reduction value of the engine and the maximum torque reduction value of the electric drive system;

[0012] The maximum torque reduction value of the drive system is obtained according to the sum of the maximum torque reduction value of the engine and the maximum torque reduction value of the electric drive system.

[0013] Optionally, obtaining the maximum torque reduction value of the engine includes:

[0014] Obtaining a basic ignition angle torque and a thrust ignition angle torque of the engine;

[0015] Obtaining a maximum torque reduction value of the engine according to a difference between the push ignition angle torque and the basic ignition angle torque;

[0016] Optionally, obtaining the maximum torque reduction value of the electric drive system includes:

[0017] Obtaining a maximum charging power and a current motor torque of at least one component in the electric drive system;

[0018] Determine a target component with minimum power from the maximum charging power of the at least one component, and determine a minimum negative torque of the electric drive system according to the maximum charging power of the target component;

[0019] The maximum torque reduction value of the electric drive system is obtained according to the difference between the minimum negative torque and the current motor torque.

[0020] Optionally, the determining whether a gear shift torque reduction flag of the vehicle is in an activated state includes:

[0021] Obtaining the current throttle opening of the vehicle and determining whether the vehicle has a gear shifting requirement;

[0022] If the current throttle opening is greater than a preset opening and the vehicle has the gear shifting requirement, it is determined that the gear shift torque reduction flag is in the activated state.

[0023] Optionally, after determining the target torque reduction value according to the current torque reduction demand, the method further includes:

[0024] If the maximum torque reduction value of the drive system is greater than or equal to the target torque reduction value, the torque reduction is performed based on the target torque reduction value.

[0025] A second aspect of the present application provides a vehicle shift torque control device, comprising:

[0026] A judgment module, used to judge whether the gear shift torque reduction flag of the vehicle is in an activated state;

[0027] an acquisition module, configured to acquire a maximum torque reduction value of the drive system when the gear shift torque reduction flag is in the activated state, and determine a target torque reduction value according to a current torque reduction demand;

[0028] A control module is used to calculate the difference between the target torque reduction value and the maximum torque reduction value of the drive system when the target torque reduction value is greater than the maximum torque reduction value of the drive system, match the gear shifting speed regulation time and the gear shifting control parameters according to the difference between the maximum torque reduction value of the drive system and the difference, and perform torque reduction control according to the gear shifting speed regulation time and the gear shifting control parameters.

[0029] Optionally, the acquisition module is specifically used to:

[0030] Obtain the maximum torque reduction value of the engine and the maximum torque reduction value of the electric drive system;

[0031] The maximum torque reduction value of the drive system is obtained according to the sum of the maximum torque reduction value of the engine and the maximum torque reduction value of the electric drive system.

[0032] Optionally, the acquisition module is specifically used to:

[0033] Obtaining a basic ignition angle torque and a thrust ignition angle torque of the engine;

[0034] The maximum torque reduction value of the engine is obtained according to the difference between the push ignition angle torque and the basic ignition angle torque.

[0035] Optionally, the acquisition module is specifically used to:

[0036] Obtaining a maximum charging power and a current motor torque of at least one component in the electric drive system;

[0037] Determine a target component with minimum power from the maximum charging power of the at least one component, and determine a minimum negative torque of the electric drive system according to the maximum charging power of the target component;

[0038] The maximum torque reduction value of the electric drive system is obtained according to the difference between the minimum negative torque and the current motor torque.

[0039] Optionally, the judging module is specifically configured to:

[0040] Obtaining the current throttle opening of the vehicle and determining whether the vehicle has a gear shifting requirement;

[0041] If the current throttle opening is greater than a preset opening and the vehicle has the gear shifting requirement, it is determined that the gear shift torque reduction flag is in the activated state.

[0042] Optionally, after determining the target torque reduction value according to the current torque reduction demand, the control module is further configured to:

[0043] If the maximum torque reduction value of the drive system is greater than or equal to the target torque reduction value, the torque reduction is performed based on the target torque reduction value.

[0044] A third aspect of the present application provides a vehicle, comprising 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 vehicle shift torque control method as described in the above embodiment.

[0045] A fourth aspect of the present application provides a computer-readable storage medium having a computer program stored thereon, the program being executed by a processor to implement the vehicle shift torque control method as described in the above embodiment.

[0046] A fifth aspect of the present application provides a computer program product, which stores a computer program. When the program is executed by a processor, it implements the vehicle shift torque control method as described in the above embodiment.

[0047] Therefore, after judging that the gear shift torque reduction flag of the vehicle is in an activated state, the maximum torque reduction value of the drive system is obtained, and the target torque reduction value is determined according to the current torque reduction demand; when the target torque reduction value is greater than the maximum torque reduction value of the drive system, the difference between the two is calculated, and the gear shift speed regulation time and the gear shift control parameter are matched according to the difference of the maximum torque reduction value of the drive system, and the torque reduction control is performed according to the gear shift speed regulation time and the gear shift control parameter. Therefore, by reasonably allocating the torque reduction request when the transmission shifts to the motor and the engine, the problems such as poor gear shift torque reduction quality caused by insufficient battery charging capacity and gear shift shock are solved, ensuring good gear shift quality under any working conditions.

[0048] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0050] Figure 1 A flow chart of a vehicle shift torque control method provided according to an embodiment of the present application;

[0051] Figure 2 A schematic diagram showing the relationship between various controllers of a vehicle shift torque control method provided according to an embodiment of the present application;

[0052] Figure 3A flow chart of a vehicle shift torque control method provided according to an embodiment of the present application;

[0053] Figure 4 A schematic diagram of a vehicle shift torque control device provided according to an embodiment of the present application;

[0054] Figure 5 It is a schematic diagram of the structure of a vehicle provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0055] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0056] The following describes the shift torque control method, device, vehicle, medium and program of the vehicle of the embodiment of the present application with reference to the accompanying drawings. In view of the problem of poor shift torque reduction quality caused by insufficient battery charging capacity mentioned in the above background technology, which leads to shift shock, the present application provides a vehicle shift torque control method, in which after judging that the vehicle's shift torque reduction flag is in an activated state, the target torque reduction value is determined according to the current torque reduction demand; when the target torque reduction value is greater than the maximum torque reduction value of the drive system, the difference between the two is calculated, and the shift speed regulation time and the shift control parameter are matched according to the difference of the maximum torque reduction value of the drive system and the difference, and the torque reduction control is performed according to the shift speed regulation time and the shift control parameter. Therefore, by reasonably allocating the torque reduction request when the transmission shifts to the motor and the engine, the poor shift torque reduction quality caused by insufficient battery charging capacity, which leads to shift shock and other problems, is solved, ensuring that good shift quality can be achieved under any working conditions.

[0057] Specifically, Figure 1 A schematic flow chart of a vehicle shift torque control method provided in an embodiment of the present application.

[0058] like Figure 1 As shown, the vehicle shift torque control method includes the following steps:

[0059] In step S101, it is determined whether the gear shift torque reduction flag of the vehicle is in an activated state.

[0060] The gear shift torque reduction flag is a status mark for indicating whether the vehicle has entered a gear shift process and needs to perform torque reduction control.

[0061] Specifically, when the driver steps on the accelerator deeply and the current operating conditions indicate that a gear shift is in progress or is about to take place, the vehicle's gear shift torque reduction flag is activated, and the control system will assume that it is time to prepare for torque reduction so that it can respond quickly and provide sufficient torque reduction support during the gear shift process.

[0062] Optionally, in some embodiments, determining whether the gear shift and torque reduction flag of the vehicle is in an activated state includes: obtaining the current throttle opening of the vehicle, and determining whether the vehicle has a gear shift requirement; if the current throttle opening is greater than a preset opening and the vehicle has a gear shift requirement, then determining that the gear shift and torque reduction flag is in an activated state.

[0063] The throttle opening refers to the degree to which the driver presses the accelerator pedal, which is used to indicate how much power the driver wants the vehicle to provide. The preset opening refers to a throttle pedal position threshold set within the control system; the preset opening can be pre-set by the user, obtained through a limited number of experiments, or obtained through a limited number of computer simulations, and is not specifically limited here.

[0064] It is understandable that the embodiment of the present application will read the current position information of the accelerator pedal of the vehicle to understand the driver's acceleration intention. The embodiment of the present application will analyze the current driving state of the vehicle, including but not limited to the current vehicle speed, engine speed and other factors, to determine whether a gear shift is required. For example, when the driver accelerates or decelerates, especially when the throttle opening is large and lasts for a long time, the control system will think that the driver wants the vehicle to accelerate or improve efficiency, so it may be necessary to shift up or down; the driving state of the vehicle such as the current speed, engine speed, etc. is also an important basis for judging whether a gear shift is required. When the vehicle speed increases to a certain level and the engine speed is high, the control system may think that a gear shift is required to reduce the speed; different driving conditions, such as climbing, downhill or different sections of urban roads and highways, may require different gears to maintain the best fuel economy and driving performance. If the current throttle opening is greater than a preset threshold, and the embodiment of the present application determines that the vehicle does have a gear shift demand, then it is considered that the gear shift torque reduction flag is in an activated state.

[0065] In step S102, if the gear shift torque reduction flag is in an activated state, the maximum torque reduction value of the drive system is obtained, and the target torque reduction value is determined according to the current torque reduction demand.

[0066] The maximum torque reduction value refers to the maximum torque reduction that the vehicle's drive system can provide at a certain moment, and the target torque reduction value is the torque reduction determined according to the actual needs of the current gear shift process.

[0067] Optionally, in some embodiments, obtaining the maximum torque reduction value of the engine includes: obtaining a basic ignition angle torque and a push ignition angle torque of the engine; and obtaining the maximum torque reduction value of the engine according to a difference between the push ignition angle torque and the basic ignition angle torque.

[0068] Among them, basic ignition angle torque refers to the torque generated by the engine at the standard ignition angle (i.e. the designed optimal ignition advance angle). This value is usually the torque value corresponding to the ignition angle set in order to obtain the best power output and efficiency when the engine is in normal operation; basic ignition angle torque represents the torque output level of the engine under ideal working conditions. Advance ignition angle torque refers to a measure to reduce the engine output torque by delaying the ignition angle during engine operation.

[0069] It is understandable that the value of the basic ignition angle torque is usually determined by the ECU (engine control unit) according to the current engine operating state (such as speed, load, etc.), and is the torque output of the engine under the optimal working condition; delaying the ignition angle will cause the combustion process to change, resulting in a reduction in the engine's torque output. The torque value after the delayed ignition is the push ignition angle torque; by comparing the difference between the push ignition angle torque and the basic ignition angle torque, the maximum torque reduction that the engine can achieve without triggering the cylinder cut-off function can be obtained. This difference is the maximum limit to which the engine can reduce the torque by adjusting the ignition advance angle. Therefore, by calculating the difference between the basic ignition angle torque and the push ignition angle torque, it is possible to ensure that the torque output is reduced as much as possible within a safe range, thereby providing better smoothness and control during the shifting process.

[0070] Optionally, in some embodiments, obtaining the maximum torque reduction value of the electric drive system includes: obtaining the maximum charging power and current motor torque of at least one component in the electric drive system; determining a target component with the minimum power from the maximum charging power of at least one component, and determining the minimum negative torque of the electric drive system based on the maximum charging power of the target component; and obtaining the maximum torque reduction value of the electric drive system based on the difference between the minimum negative torque and the current motor torque.

[0071] Among them, the maximum charging power refers to the maximum power input that each component in the electric drive system (such as battery, motor, inverter, etc.) can accept under specific conditions; the minimum negative torque refers to the most negative (i.e. minimum) torque value that the electric drive system (motor) can generate when performing energy recovery or braking. During the gear shifting process, the electric drive system will assume part of the torque reduction task, that is, reduce the vehicle's forward momentum by increasing braking or reducing drive to facilitate smooth gear shifting of the transmission.

[0072] It can be understood that the maximum charging power of at least one component in the electric drive system is obtained. These components may include but are not limited to battery packs, inverters, motor controllers, etc., and the maximum power input that can be accepted while ensuring safe operation; obtaining the current motor torque refers to the actual torque value generated by the motor in the current working state. The motor torque can be directly measured by the sensor or calculated by the motor controller based on the current and other parameters; finding the component with the minimum charging power among all target components. This component usually determines the maximum charging capacity of the entire system. According to the maximum charging power of the target component, the minimum negative torque of the electric drive system at the maximum charging power can be determined. This torque will offset part of the positive drive torque; by calculating the difference between the current motor torque and the minimum negative torque of the electric drive system, the maximum torque reduction value of the electric drive system can be obtained. This difference reflects the maximum positive drive torque that the electric drive system can reduce by adjusting its working mode in the current state.

[0073] Optionally, in some embodiments, obtaining the maximum torque reduction value of the drive system includes: obtaining the maximum torque reduction value of the engine and the maximum torque reduction value of the electric drive system; and obtaining the maximum torque reduction value of the drive system according to the sum of the maximum torque reduction value of the engine and the maximum torque reduction value of the electric drive system.

[0074] It is understandable that the maximum torque reduction value of the engine needs to obtain the basic ignition angle torque and the push ignition angle torque of the engine, and calculate the difference between the two torque values. This value reflects the maximum torque reduction that the engine can contribute by adjusting the ignition advance angle without triggering the engine cylinder cutoff; the maximum torque reduction value of the electric drive system is obtained by obtaining the maximum charging power and current motor torque of each component in the electric drive system, identifying the component with the smallest charging power among these components, and determining the minimum negative torque of the electric drive system based on its maximum charging power. Finally, the maximum torque reduction value of the electric drive system is obtained by the difference between the current motor torque and the minimum negative torque; this reflects the maximum torque reduction that the electric drive system can provide. The maximum torque reduction value of the engine is added to the maximum torque reduction value of the electric drive system, and finally the maximum torque reduction value that the entire drive system can withstand is obtained. In this way, it can be ensured that during the vehicle shifting process, even under certain special conditions (such as limited battery charging capacity), the torque reduction request of the motor and the engine can be reasonably allocated to optimize the shifting process, avoiding the engine from entering the cylinder cutoff state due to excessive torque reduction, thereby ensuring the consistency and smoothness of the shifting quality.

[0075] Specifically, the maximum torque reduction value is obtained by calculating the difference between the basic ignition angle torque and the push ignition angle torque: Maximum torque reduction value = basic ignition angle torque - push ignition angle torque Maximum torque reduction value = basic ignition angle torque - push ignition angle torque. The embodiment of the present application can calculate the maximum torque value that needs to be adjusted during the gear shifting process according to the current operating state of the engine and the adjusted ignition angle during the gear shifting process.

[0076] In step S103, if the target torque reduction value is greater than the maximum torque reduction value of the drive system, the difference between the target torque reduction value and the maximum torque reduction value of the drive system is calculated, and the gear shifting speed regulation time and the gear shifting control parameters are matched according to the difference of the maximum torque reduction value of the drive system, and the torque reduction control is performed according to the gear shifting speed regulation time and the gear shifting control parameters.

[0077] Among them, the gear shifting speed regulation time refers to the time required for the transmission to smoothly switch from one gear to another during the gear shifting process. This time includes the entire process from starting to reduce torque to completing the gear shift and restoring torque output; the gear shifting control parameters refer to a series of parameters that the vehicle control system needs to adjust during the gear shifting process in order to achieve smooth gear shifting and efficient power transmission.

[0078] Specifically, when the target torque reduction value is greater than the maximum torque reduction value of the drive system, the difference between the target torque reduction value and the maximum torque reduction value of the drive system is calculated. This difference represents the torque reduction requirement that exceeds the maximum torque reduction capacity of the embodiment of the present application. In order to ensure that the embodiment of the present application can complete the gear shifting in a smooth manner, based on this difference, the embodiment of the present application will adjust the gear shifting speed regulation time and other gear shifting control parameters; according to the adjusted gear shifting speed regulation time and control parameters, the embodiment of the present application performs torque reduction control; although the final torque reduction may be smaller than the initial target torque reduction value, the gear shifting process can be ensured to be smooth due to the adjustment of the gear shifting speed and the control parameters in the process.

[0079] It should be noted that the shift control parameters include but are not limited to the shift speed adjustment time, the torque control strategy during the shift, the engine ignition advance angle adjustment and other control variables related to the shift process. The setting of the speed adjustment time will affect the smoothness of the shift process and the size of the shift shock. If the torque reduction demand exceeds the capacity of the embodiment of the present application, the speed adjustment time may be appropriately extended to ensure the smoothness of the shift process; the ignition advance angle is a key factor affecting the engine torque output. During the shift process, adjusting the ignition advance angle to reduce the engine output torque can help achieve smooth shifting. If the torque reduction demand exceeds the engine capacity, the torque reduction achieved by delaying the ignition angle is limited. At this time, it is necessary to optimize the ignition advance angle adjustment strategy to avoid triggering the engine cylinder cut; in addition to the above parameters, there are other variables that will also affect the shift effect, such as clutch engagement speed, gear meshing speed, etc. In a hybrid vehicle of P2 configuration, it is also necessary to consider the coordinated work between the motor and the engine to ensure the overall coordination of the power system during the shift process.

[0080] Therefore, after judging that the gear shift torque reduction flag of the vehicle is in an activated state, the maximum torque reduction value of the drive system is obtained, and the target torque reduction value is determined according to the current torque reduction demand; when the target torque reduction value is greater than the maximum torque reduction value of the drive system, the difference between the two is calculated, and the gear shift speed regulation time and the gear shift control parameter are matched according to the difference of the maximum torque reduction value of the drive system, and the torque reduction control is performed according to the gear shift speed regulation time and the gear shift control parameter. Therefore, by reasonably allocating the torque reduction request when the transmission shifts to the motor and the engine, the problems such as poor gear shift torque reduction quality caused by insufficient battery charging capacity and gear shift shock are solved, ensuring good gear shift quality under any working conditions.

[0081] Optionally, in some embodiments, after determining the target torque reduction value according to the current torque reduction demand, the method further includes: if the maximum torque reduction value of the drive system is greater than or equal to the target torque reduction value, performing torque reduction based on the target torque reduction value.

[0082] It can be understood that if the maximum torque reduction value of the drive system is greater than or equal to the target torque reduction value, then the current demand is within the capabilities of the embodiment of the present application, and the torque reduction can be completed smoothly and effectively to support the gear shifting process; the embodiment of the present application will adjust the torque output of the engine or motor and perform torque reduction control according to the target torque reduction value. This control may include adjusting the ignition advance angle of the engine, changing the torque output of the motor, etc., to ensure that sufficient torque reduction support is provided during the gear shifting process, thereby achieving a smooth gear shifting experience.

[0083] Therefore, by reducing the torque based on the target torque reduction value, the engine's torque output can be controlled more accurately, avoiding the sense of frustration caused by sudden torque changes, improving the smoothness of gear shifting, protecting mechanical components, improving driving comfort, ensuring the efficiency and smoothness of the gear shifting process, and improving the overall performance of the vehicle.

[0084] The following describes in detail the vehicle shift control method in conjunction with the signal interaction relationship between the various controllers of the vehicle's shift working condition in the embodiment of the present application.

[0085] Specifically, Figure 2 As shown, Figure 2 It is a schematic diagram of the relationship between various controllers of a vehicle shift torque control method according to a specific embodiment of the present application.

[0086] It is understandable that the driver controls the acceleration and deceleration of the vehicle through the accelerator pedal and the brake pedal. The degree of depression of the accelerator pedal determines the acceleration demand of the vehicle, and the brake pedal is used to decelerate or stop. The vehicle controller is responsible for collecting operation information from the driver and monitoring the battery power and charging capacity. It determines whether torque reduction operation is required and the degree of torque reduction based on this information. Once the engine controller receives a torque reduction request, the engine controller will adjust the engine's ignition advance angle to generate the required push ignition angle torque. If the push ignition angle torque is not enough to meet the torque reduction demand, the engine controller will send a signal to the vehicle controller to inform it that the maximum torque reduction capacity has been reached. The transmission controller selects the appropriate gear according to the instructions of the vehicle controller and issues a torque reduction request. It also limits the upper limit of the torque request to prevent excessive torque reduction. The battery controller monitors the battery status. The engine controller will monitor the state of the vehicle, including the remaining power and charging capacity, and it will feed this information back to the vehicle controller so that it can make corresponding decisions; the motor controller adjusts the torque output of the motor according to the instructions of the vehicle controller. If the battery power is sufficient, the motor can provide additional negative torque to assist in torque reduction; the motor demand torque is determined by the battery power and charging capacity. If the battery power is low, the motor may not be able to provide enough negative torque to assist in torque reduction. The engine push angle torque is the torque output of the engine when the ignition angle is delayed. If the maximum torque reduction value of the engine is still not enough to meet the torque reduction demand, the engine controller will pass this information to the vehicle controller; the engine torque demand is determined according to the driver's operation and the instructions of the vehicle controller; if the torque reduction demand exceeds the maximum torque reduction value of the engine, the engine controller will try to reduce the engine's output torque by delaying the ignition angle. In this way, the controllers work together to achieve smooth torque reduction during the gear shift process, ensuring the driver's comfort and the overall performance of the vehicle.

[0087] Furthermore, combined with Figure 2 A vehicle shift torque control method according to a specific embodiment of the present application is described in detail. Figure 3As shown, the vehicle shift torque control method comprises the following steps:

[0088] S301: The VCU receives the current basic ignition angle torque and the limit push ignition angle torque sent by the ECU. The difference between the two represents the maximum torque reduction capability of the engine.

[0089] S302: The VCU simultaneously calculates the maximum charging power of each component of the electric drive system, and selects the minimum value therefrom as the maximum torque reduction capability of the electric drive system. This minimum value represents the maximum negative torque that the electric drive system can provide in the current state.

[0090] S303: The VCU adds the maximum torque reduction capabilities of the engine and the electric drive system to obtain the maximum torque reduction capability of the drive system, and sends this value to the TCU.

[0091] S304: During the gear shifting process, the TCU uses information from the VCU to control the torque reduction and adjust the gear shifting parameters to ensure the smoothness of the gear shifting process; the key is to reasonably arrange the torque reduction according to the maximum torque reduction capability of the embodiment of the present application to prevent adverse phenomena such as engine cylinder disconnection and ensure the smoothness of the gear shifting process.

[0092] According to the vehicle shift torque control method proposed in the embodiment of the present application, after judging that the vehicle's shift torque reduction flag is in an activated state, the maximum torque reduction value of the drive system is obtained, and the target torque reduction value is determined according to the current torque reduction demand; when the target torque reduction value is greater than the maximum torque reduction value of the drive system, the difference between the two is calculated, and the shift speed regulation time and the shift control parameter are matched according to the difference of the maximum torque reduction value of the drive system, and the torque reduction control is performed according to the shift speed regulation time and the shift control parameter. Therefore, by reasonably allocating the torque reduction request when the transmission shifts to the motor and the engine, the problems such as poor shift torque reduction quality caused by insufficient battery charging capacity and shift shock are solved, ensuring that good shift quality can be achieved under any working conditions.

[0093] Next, the shift torque control device for a vehicle proposed in accordance with an embodiment of the present application will be described with reference to the accompanying drawings.

[0094] Figure 4 It is a block diagram of a gear shift torque control device for a vehicle according to an embodiment of the present application.

[0095] like Figure 4 As shown, the vehicle shift torque control device 10 includes: a judgment module 100 , an acquisition module 200 , and a control module 300 .

[0096] The judging module 100 is used to judge whether the gear shift torque reduction flag of the vehicle is in an activated state;

[0097] The acquisition module 200 is used to acquire the maximum torque reduction value of the drive system when the gear shift torque reduction flag is in the activated state, and determine the target torque reduction value according to the current torque reduction demand;

[0098] The control module 300 is used to calculate the difference between the target torque reduction value and the maximum torque reduction value of the drive system when the target torque reduction value is greater than the maximum torque reduction value of the drive system, and match the gear shifting speed regulation time and the gear shifting control parameters according to the difference of the maximum torque reduction value of the drive system and the difference, and perform torque reduction control according to the gear shifting speed regulation time and the gear shifting control parameters.

[0099] Optionally, the acquisition module 200 is specifically used to: acquire the maximum torque reduction value of the engine and the maximum torque reduction value of the electric drive system; and obtain the maximum torque reduction value of the drive system according to the sum of the maximum torque reduction value of the engine and the maximum torque reduction value of the electric drive system.

[0100] Optionally, the acquisition module 200 is specifically used to: acquire the basic ignition angle torque and the push ignition angle torque of the engine; and obtain the maximum torque reduction value of the engine according to the difference between the push ignition angle torque and the basic ignition angle torque.

[0101] Optionally, the acquisition module 200 is specifically used to: obtain the maximum charging power and current motor torque of at least one component in the electric drive system; determine the target component with the minimum power from the maximum charging power of at least one component, and determine the minimum negative torque of the electric drive system according to the maximum charging power of the target component; obtain the maximum torque reduction value of the electric drive system according to the difference between the minimum negative torque and the current motor torque.

[0102] Optionally, the judgment module 100 is specifically used to: obtain the current throttle opening of the vehicle and judge whether the vehicle has a gear shifting demand; if the current throttle opening is greater than a preset opening and the vehicle has a gear shifting demand, it is determined that the gear shift torque reduction flag is in an activated state.

[0103] Optionally, after determining the target torque reduction value according to the current torque reduction demand, the control module 300 is further configured to: if the maximum torque reduction value of the drive system is greater than or equal to the target torque reduction value, perform torque reduction based on the target torque reduction value.

[0104] It should be noted that the above explanation of the embodiment of the vehicle shift torque control method is also applicable to the vehicle shift torque control device of this embodiment, which will not be repeated here.

[0105] According to the vehicle shift torque control device proposed in the embodiment of the present application, when it is determined that the vehicle's shift torque reduction flag is in an activated state, the target torque reduction value is determined according to the current torque reduction demand; when the target torque reduction value is greater than the maximum torque reduction value of the drive system, the difference between the two is calculated, and the shift speed regulation time and the shift control parameter are matched according to the difference of the maximum torque reduction value of the drive system, and the torque reduction control is performed according to the shift speed regulation time and the shift control parameter. Therefore, by reasonably allocating the torque reduction request when the transmission shifts to the motor and the engine, the poor shift torque reduction quality caused by insufficient battery charging capacity, resulting in shift shock and other problems, ensures that good shift quality can be achieved under any working conditions.

[0106] Figure 5 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. The vehicle may include:

[0107] A memory 501 , a processor 502 , and a computer program stored in the memory 501 and executable on the processor 502 .

[0108] When the processor 502 executes the program, the vehicle shift torque control method provided in the above embodiment is implemented.

[0109] Furthermore, the vehicle also includes:

[0110] The communication interface 503 is used for communication between the memory 501 and the processor 502 .

[0111] The memory 501 is used to store computer programs that can be executed on the processor 502 .

[0112] The memory 501 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.

[0113] If the memory 501, the processor 502 and the communication interface 503 are implemented independently, the communication interface 503, the memory 501 and the processor 502 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 5 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.

[0114] Optionally, in a specific implementation, if the memory 501, the processor 502 and the communication interface 503 are integrated on a chip, the memory 501, the processor 502 and the communication interface 503 can communicate with each other through an internal interface.

[0115] The processor 502 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 application.

[0116] An embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, and when the program is executed by a processor, the above-mentioned vehicle shift torque control method is implemented.

[0117] An embodiment of the present invention further provides a computer program product, which stores a computer program. When the program is executed by a processor, the above-mentioned vehicle shift torque control method is implemented.

[0118] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradicting each other.

[0119] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0120] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0121] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0122] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

Claims

1. A vehicle shift torque control method, characterized in that: The following steps are involved: Determine whether the gear shift torque reduction flag of the vehicle is in an activated state; If the gear shift torque reduction flag is in the activated state, the maximum torque reduction value of the drive system is obtained, and a target torque reduction value is determined according to the current torque reduction demand; If the target torque reduction value is greater than the maximum torque reduction value of the drive system, the difference between the target torque reduction value and the maximum torque reduction value of the drive system is calculated, and the gear shifting speed regulation time and the gear shifting control parameters are matched according to the difference between the maximum torque reduction value of the drive system and the difference, and the torque reduction control is performed according to the gear shifting speed regulation time and the gear shifting control parameters.

2. The method according to claim 1, characterized in that The obtaining of the maximum torque reduction value of the driving system includes: Obtain the maximum torque reduction value of the engine and the maximum torque reduction value of the electric drive system; The maximum torque reduction value of the drive system is obtained according to the sum of the maximum torque reduction value of the engine and the maximum torque reduction value of the electric drive system.

3. The method according to claim 2, characterized in that The step of obtaining the maximum torque reduction value of the engine includes: Obtaining a basic ignition angle torque and a thrust ignition angle torque of the engine; The maximum torque reduction value of the engine is obtained according to the difference between the push ignition angle torque and the basic ignition angle torque.

4. The method according to claim 2, characterized in that: The obtaining of the maximum torque reduction value of the electric drive system includes: Obtaining a maximum charging power and a current motor torque of at least one component in the electric drive system; Determine a target component with minimum power from the maximum charging power of the at least one component, and determine a minimum negative torque of the electric drive system according to the maximum charging power of the target component; The maximum torque reduction value of the electric drive system is obtained according to the difference between the minimum negative torque and the current motor torque.

5. The method according to claim 1, characterized in that The step of judging whether the gear shift torque reduction flag of the vehicle is in an activated state includes: Obtaining the current throttle opening of the vehicle and determining whether the vehicle has a gear shifting requirement; If the current throttle opening is greater than a preset opening and the vehicle has the gear shifting requirement, it is determined that the gear shift torque reduction flag is in the activated state.

6. The method according to claim 1, characterized in that After determining the target torque reduction value according to the current torque reduction demand, the method further includes: If the maximum torque reduction value of the drive system is greater than or equal to the target torque reduction value, the torque reduction is performed based on the target torque reduction value.

7. A vehicle shift torque control device, characterized in that: The following steps are involved: A judgment module, used to judge whether the gear shift torque reduction flag of the vehicle is in an activated state; an acquisition module, configured to acquire a maximum torque reduction value of the drive system when the gear shift torque reduction flag is in the activated state, and determine a target torque reduction value according to a current torque reduction demand; A control module is used to calculate the difference between the target torque reduction value and the maximum torque reduction value of the drive system when the target torque reduction value is greater than the maximum torque reduction value of the drive system, match the gear shifting speed regulation time and the gear shifting control parameters according to the difference between the maximum torque reduction value of the drive system and the difference, and perform torque reduction control according to the gear shifting speed regulation time and the gear shifting control parameters.

8. A vehicle, characterized in that: The invention 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 vehicle shift torque control method as claimed in any one of claims 1 to 6.

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 vehicle shift torque control method according to any one of claims 1 to 6.

10. A computer program product, wherein the computer program product stores a computer program, characterized in that: When the program is executed by a processor, the vehicle shift torque control method according to any one of claims 1 to 6 is implemented.

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