A shift control method and device, electronic equipment and storage medium

Abstract

The application provides a gear shifting control method and device, electronic equipment and storage medium, which can be applied to a hybrid electric vehicle. According to a target gear shifting type of the hybrid electric vehicle in a target gear shifting mode, the gear shifting control method and device determine upshift and downshift parameters of the hybrid electric vehicle, the upshift and downshift parameters including an input shaft upshift speed, an upshift vehicle speed, an input shaft downshift speed and a downshift vehicle speed. According to a current input shaft speed, a current vehicle speed and the upshift and downshift parameters of the hybrid electric vehicle, the gear shifting control method and device determine a gear shifting state that the hybrid electric vehicle needs to enter, the gear shifting state including an upshift state and a downshift state. The gear shifting control method and device control the hybrid electric vehicle to enter the gear shifting state that the hybrid electric vehicle needs to enter. That is, the application can convert gear shifting judgment from a vehicle speed to an input shaft speed, and consider actual vehicle speeds corresponding to upshift and downshift speed points, so as to solve the problem that, due to the fact that a vehicle speed range is relatively narrow compared with an input shaft speed range, only gear shifting control judgment according to a vehicle speed can easily cause cyclic gear shifting.

Description

Technical Field

[0001] This invention relates to the field of control technology, specifically to a shift control method, device, electronic equipment, and storage medium. Background Technology

[0002] Heavy-duty trucks primarily use manual transmissions. Due to the narrow operating speed range and high torque of heavy-duty truck engines, they typically have 12-speed or 16-speed transmissions. Because of the large number of gears, the shift control must have a skip-gear function to quickly match the appropriate gear to the powertrain.

[0003] In the hybrid shift control of heavy-duty trucks using the P2 hybrid transmission system, shifting is generally controlled based on vehicle speed. The gearbox of a heavy-duty truck consists of a main gearbox and an auxiliary gearbox, which are combined to form multiple gear ratios. It is necessary to develop a vehicle skip-shift function. The inventors found that because the vehicle speed range (0-80km / h) is relatively narrow compared to the input shaft speed range (0-3000r / min), shifting control based on vehicle speed can easily lead to cyclic shifting. Summary of the Invention

[0004] In response to this, this application provides a shift control method, device, electronic device, and storage medium to solve the problem that, due to the relatively narrow range of vehicle speed compared to the input shaft speed range, shift control is easily triggered based solely on vehicle speed, which can easily lead to cyclic shifting.

[0005] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0006] The first aspect of this application discloses a shift control method applied to a hybrid vehicle, the method comprising:

[0007] Based on the target shift type of the hybrid vehicle in the target shift mode, the upshift and downshift parameters of the hybrid vehicle are determined. The upshift and downshift parameters include: input shaft upshift speed, upshift vehicle speed, input shaft downshift speed, and downshift vehicle speed.

[0008] Based on the current input shaft speed, current vehicle speed, and upshift / downshift parameters of the hybrid vehicle, the shift state that the hybrid vehicle needs to enter is determined, and the shift state includes upshift state and downshift state.

[0009] Control the hybrid vehicle to enter the required gear shift state.

[0010] Optionally, in the above-described shift control method, the process of determining the target shift type of the hybrid vehicle under the target shift mode includes:

[0011] Based on the current battery charge and high-voltage fault status of the hybrid vehicle, determine the target shift mode of the hybrid vehicle among pure electric shift mode, hybrid shift mode and engine shift mode.

[0012] Determine all shift types under the target shift mode, and determine the target shift type among all shift types, wherein the shift types include: power shift, economy shift, forced shift and low frequency shift.

[0013] Optionally, in the above-described shift control method, if the hybrid vehicle has a high-voltage fault, the target shift mode of the hybrid vehicle is the engine shift mode.

[0014] The hybrid vehicle has no high-voltage fault, and the current battery charge of the hybrid vehicle is greater than the preset battery charge. The target shift mode of the hybrid vehicle is the pure electric shift mode.

[0015] The hybrid vehicle has no high-voltage fault, and the current battery charge of the hybrid vehicle is not greater than the preset battery charge. The target shift mode of the hybrid vehicle is the hybrid shift mode.

[0016] Optionally, in the above-described shift control method, if the hybrid vehicle meets the preset power shift conditions, the target shift type of the hybrid vehicle is the power shift. Meeting the preset power shift conditions includes: the current throttle change rate of the hybrid vehicle is within the preset power shift throttle change rate range corresponding to the target shift mode, and / or, the power button of the hybrid vehicle is in the activated state.

[0017] If the hybrid vehicle meets the preset economic shift conditions, the target shift type of the hybrid vehicle is the economic shift. Meeting the preset economic shift conditions includes: the current throttle change rate of the hybrid vehicle is within the preset economic shift throttle change rate range corresponding to the target shift mode, and / or, the economic button of the hybrid vehicle is in the activated state.

[0018] If the hybrid vehicle meets the preset forced shift conditions, the target shift type of the hybrid vehicle is the forced shift. Meeting the preset forced shift conditions includes: the current throttle change rate of the hybrid vehicle is within the preset forced shift throttle change rate range corresponding to the target shift mode.

[0019] If the hybrid vehicle meets the preset low-frequency shifting conditions, the target shifting type of the hybrid vehicle is the low-frequency shifting. Meeting the preset low-frequency shifting conditions includes: the current road gradient of the hybrid vehicle is greater than the preset uphill road gradient corresponding to the target shifting mode, or the current road gradient of the hybrid vehicle is greater than the preset downhill road gradient corresponding to the target shifting mode.

[0020] Optionally, in the above-described shift control method, after determining the upshift / downshift parameters of the hybrid vehicle based on the target shift type of the hybrid vehicle in the target shift mode, the method further includes:

[0021] Determine the current vehicle condition parameters of the hybrid vehicle, the current vehicle condition parameters including at least one of the following: current load, current curvature, and current road slope;

[0022] The upshifting and downshifting parameters of the hybrid vehicle are adjusted based on the current vehicle condition parameters.

[0023] Optionally, in the above-described shift control method, determining the shift state that the hybrid vehicle needs to enter based on the current input shaft speed, current vehicle speed, and the upshift / downshift parameters includes:

[0024] Determine whether the preset upshift and downshift conditions are met respectively;

[0025] If it is determined that the preset upshifting conditions are met, then the shifting state that the hybrid vehicle needs to enter is the upshifting state.

[0026] If it is determined that the preset downshifting conditions are met, then the shifting state that the hybrid vehicle needs to enter is the downshifting state.

[0027] The preset upshift condition is satisfied when the current input shaft speed is greater than the input shaft upshift speed and the current vehicle speed is greater than the upshift speed. The preset downshift condition is satisfied when the current input shaft speed is less than the input shaft downshift speed and the current vehicle speed is less than the downshift speed.

[0028] Optionally, in the above-described shift control method, before controlling the hybrid vehicle to enter the required shift state, the method further includes:

[0029] Determine whether the current acceleration of the hybrid vehicle is greater than the corresponding calibration value;

[0030] If the current acceleration of the hybrid vehicle is greater than the corresponding calibration value, the hybrid vehicle is controlled to enter the required shift state.

[0031] The second aspect of this application discloses a shift control device for use in a hybrid electric vehicle, comprising:

[0032] The first determining unit is used to determine the upshifting and downshifting parameters of the hybrid vehicle based on the target shifting type of the hybrid vehicle in the target shifting mode. The upshifting and downshifting parameters include: input shaft upshifting speed, upshifting speed, input shaft downshifting speed, and downshifting speed.

[0033] The second determining unit is used to determine the shifting state that the hybrid vehicle needs to enter based on the current input shaft speed, current vehicle speed and the upshift / downshift parameters. The shifting state includes upshifting and downshifting.

[0034] The control unit is used to control the hybrid vehicle to enter the required gear shift state.

[0035] A third aspect of this application discloses an electronic device, including: a memory and a processor;

[0036] The memory is used to store computer programs;

[0037] The processor is used to execute the computer program, specifically to implement the shift control method as disclosed in the first aspect.

[0038] The fourth aspect of this application discloses a computer storage medium for storing a computer program, which, when executed, is specifically used to implement the shift control method as described in any of the claims of the first aspect.

[0039] This invention provides a shift control method, device, electronic device, and storage medium. The shift control method provided by this invention can be applied to hybrid electric vehicles. The method determines the upshift / downshift parameters of the hybrid electric vehicle based on the target shift type in the target shift mode. These parameters include: input shaft upshift speed, upshift vehicle speed, input shaft downshift speed, and downshift vehicle speed. Based on the current input shaft speed, current vehicle speed, and the upshift / downshift parameters, the method determines the shift state the hybrid electric vehicle needs to enter, including upshift and downshift states. The method then controls the hybrid electric vehicle to enter... The required shift state, that is, this application can convert the shift judgment from vehicle speed to input shaft speed, and consider the actual vehicle speed and the vehicle speed corresponding to the shift point. In addition, the vehicle speed corresponding to the shift point and the input shaft shift judgment speed are still obtained by classifying the shift mode and shift type. By reducing the shift frequency through the control strategy, it not only solves the problem that the shift control judgment is easily caused by the narrow vehicle speed range compared with the input shaft speed range, but also increases the shift adaptability, avoids shift failure in special working conditions such as uphill and downhill, and increases the reliability of shift. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0041] Figure 1 A schematic diagram of a P2 parallel hybrid power transmission system provided in this application;

[0042] Figure 2 A flowchart of a shift control method provided in an embodiment of this application;

[0043] Figure 3 A flowchart illustrating the determination of the target shift type in a target shift mode for a hybrid electric vehicle, as provided in this application embodiment;

[0044] Figure 4 and Figure 5 Flowcharts for two other shift control methods provided in the embodiments of this application;

[0045] Figure 6 This is a schematic diagram of a shift control device provided in an embodiment of this application. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] To facilitate understanding of the technical solution of this application, a brief explanation of some of the terms that may be involved will be provided first.

[0048] Gross weight: The curb weight of the vehicle when unloaded and the weight of the cargo loaded.

[0049] Gradient: The gradient of the road on which a vehicle travels can be divided into uphill and downhill. When a vehicle is moving forward, the power demand of the vehicle increases when going uphill and decreases when going downhill.

[0050] Hybrid heavy-duty trucks: The mechanical power system of traditional vehicles is fuel tank-engine-transmission-final reducer to wheels. In addition to the traditional mechanical power system, the hybrid vehicle transmission system adds an electric path power system of battery-motor-transmission-final reducer to wheels.

[0051] Gearbox: A transmission mechanism that can be operated by a shifting mechanism to amplify or reduce the speed and torque of the input or output shaft.

[0052] Cyclic shifting: Due to the skip-shift function, the vehicle may downshift immediately after upshifting, or upshift immediately after downshifting. For example, the transmission may upshift from 5th to 7th and then downshift from 7th to 6th shortly afterward.

[0053] Clutch: The clutch on a heavy truck is a mechanical device that connects the engine and the input shaft of the transmission. It consists of components such as a drive plate and a driven plate. The drive plate is fixedly connected to the engine, and the driven plate is fixedly connected to the input shaft of the transmission. Its main functions are to interrupt power transmission, smoothly start the vehicle, and transmit engine power to the transmission.

[0054] Clutch learning: Finding and storing the maximum disengagement position, minimum engagement position, and engagement slip point position of the clutch.

[0055] The maximum disengagement position of the clutch: the clutch driving plate and driven plate are completely separated.

[0056] The minimum engagement position of the clutch: the clutch driving plate and driven plate are fully engaged.

[0057] The clutch engagement slip point is the position where the clutch driving plate and driven plate just engage.

[0058] Gear shifting process: The process by which a gearbox switches from one gear to another. This process generally consists of the following steps: clearing torque, disengaging the clutch, disengaging the gear, synchronizing, selecting the gear, engaging the gear, and closing the clutch.

[0059] Clutch solenoid valve: It controls the intake and exhaust of the cylinder to separate and engage the driving plate and driven plate of the clutch, which is equivalent to the cylinder switch.

[0060] Clutch control: This mainly refers to controlling the speed and target position of clutch disengagement and engagement. This part of the control is achieved through the clutch's intake and exhaust solenoid valves.

[0061] Clutch actuators include cylinders, clutch solenoid valves, connecting rods, etc., and their function is to control the separation or engagement of the driven plate and the driving plate of the clutch.

[0062] Vehicle control modes are divided into pure electric control mode, engine control mode and hybrid control mode. Pure electric control mode refers to the electric motor driving the vehicle alone, engine control mode refers to the engine driving the vehicle alone, and hybrid control mode refers to the two driving the vehicle together.

[0063] Two-parameter shifting: The vehicle's upshifting and downshifting are determined based on the throttle and vehicle speed.

[0064] Kickdown shifting: When the driver presses the accelerator pedal to the floor, downshifting at this time can increase torque and help the vehicle accelerate quickly.

[0065] The inventors discovered that the shift points of hybrid heavy-duty trucks are affected by many factors, such as vehicle mode, slope, load, and the engine, motor, and gearbox in the transmission system. These factors all influence the shift points. To improve vehicle power and fuel economy, the shift points need to be continuously adjusted based on vehicle status and operating conditions.

[0066] Due to the harsh operating conditions of hybrid heavy-duty trucks, issues such as shifting failures and poor shifting quality are prone to occur during transmission control. One significant factor is the inappropriate gear selection, which can prevent the vehicle from starting or driving properly. In P2 parallel hybrid heavy-duty trucks, because the motor and engine are coaxially connected, as long as the clutch engagement speed remains consistent, that is... Figure 1 As shown. Specifically, a hybrid heavy-duty truck can be a single-motor parallel hybrid heavy-duty truck.

[0067] Based on the above, this application provides a shift control method, device, electronic device, and storage medium to solve the problem that, since the vehicle speed range is relatively narrow compared to the input shaft speed range, shift control is easily triggered based solely on vehicle speed, which can easily lead to cyclic shifting.

[0068] Please see Figure 2This shift control method can be applied to hybrid vehicles, such as the aforementioned hybrid heavy truck, and mainly includes the following steps:

[0069] S101. Determine the upshift and downshift parameters of the hybrid vehicle based on the target shift type in the target shift mode.

[0070] The upshifting and downshifting parameters may include: upshifting speed of the input shaft, upshifting speed of the vehicle, downshifting speed of the input shaft, and downshifting speed of the vehicle.

[0071] In practical applications, the upshifting and downshifting parameters of hybrid vehicles vary depending on the shifting mode and the type of shifting.

[0072] In some embodiments, the process of determining the target shift type of a hybrid electric vehicle in a target shift mode can be as follows: Figure 3 As shown, it mainly includes steps S201 and S202:

[0073] S201. Based on the current battery charge and high-voltage fault status of the hybrid vehicle, determine the target shift mode of the hybrid vehicle among the pure electric shift mode, hybrid shift mode, and engine shift mode.

[0074] Among them, if a hybrid vehicle has a high-voltage fault, the target shift mode for the hybrid vehicle is engine shift mode; if a hybrid vehicle does not have a high-voltage fault and its current battery charge is greater than the preset battery charge, the target shift mode for the hybrid vehicle is pure electric shift mode; if a hybrid vehicle does not have a high-voltage fault and its current battery charge is not greater than the preset battery charge, the target shift mode for the hybrid vehicle is hybrid shift mode.

[0075] Specifically, the preset battery capacity can be determined according to the application environment and user needs. For example, the preset battery capacity can be 60% or 70% of the rated battery capacity. This application does not make specific limitations on it, and all of them are within the protection scope of this application.

[0076] In practical applications, it can be first determined whether the hybrid vehicle has a high-voltage fault. If a high-voltage fault is found, the target shift mode of the hybrid vehicle is set to engine shift mode. If no high-voltage fault is found, it is determined whether the current battery charge of the hybrid vehicle is greater than the preset battery charge. If the current battery charge is greater than the preset battery charge, the target shift mode of the hybrid vehicle is set to pure electric shift mode. If the current battery charge is not greater than the preset battery charge, the target shift mode of the hybrid vehicle is set to hybrid shift mode.

[0077] S202. Determine all shift types under the target shift mode, and determine the target shift type among all shift types.

[0078] Each shift mode can be categorized into: power shift, economy shift, forced shift, and low-frequency shift.

[0079] In some embodiments, if the hybrid vehicle meets the preset power shift conditions, the target shift type of the hybrid vehicle is power shift. Meeting the preset power shift conditions includes: the current throttle change rate of the hybrid vehicle is within the preset power shift throttle change rate range corresponding to the target shift mode, and / or, the power button of the hybrid vehicle is in the activated state.

[0080] If the hybrid vehicle meets the preset economic shift conditions, the target shift type of the hybrid vehicle is economic shift. Meeting the preset economic shift conditions includes: the current throttle change rate of the hybrid vehicle is within the preset economic shift throttle change rate range corresponding to the target shift mode, and / or, the economic button of the hybrid vehicle is in the activated state.

[0081] If a hybrid vehicle meets the preset forced shift conditions, the target shift type of the hybrid vehicle is forced shift. Meeting the preset forced shift conditions includes: the current throttle change rate of the hybrid vehicle is within the preset forced shift throttle change rate range corresponding to the target shift mode; specifically, forced shift can be performed by pressing the accelerator pedal deeply and then Kick Down to shift.

[0082] If a hybrid vehicle meets the preset low-frequency shifting conditions, the target shifting type of the hybrid vehicle is low-frequency shifting. Meeting the preset low-frequency shifting conditions includes: the current road gradient of the hybrid vehicle is greater than the preset uphill road gradient corresponding to the target shifting mode, or the current road gradient of the hybrid vehicle is greater than the preset downhill road gradient corresponding to the target shifting mode.

[0083] It should be noted that the specific values ​​of the preset power shift throttle change rate range, preset economy shift throttle change rate range, preset forced shift throttle change rate range, preset uphill road gradient, and preset downhill road gradient corresponding to different shift modes can be the same or different. The specific values ​​can be determined in combination with the relevant parameters and historical data of hybrid vehicles. This application does not limit them, and they are all within the protection scope of this application.

[0084] For example, assuming the target shift mode is a pure electric shift mode, the corresponding preset power shift throttle change rate range can be 60% to 80%, the preset economy shift throttle change rate range can be 0 to 60%, the preset forced shift throttle change rate range can be 80% to 100%, the preset uphill road gradient can be 8°, and the preset downhill road gradient can be 7°.

[0085] S102. Based on the current input shaft speed, current vehicle speed, and upshift / downshift parameters of the hybrid vehicle, determine the shift state that the hybrid vehicle needs to enter.

[0086] The shifting state includes upshifting and downshifting.

[0087] In some embodiments, the specific process of executing step S102, which involves determining the shift state that the hybrid vehicle needs to enter based on the current input shaft speed, current vehicle speed, and shift parameters, mainly includes steps S301 to S303:

[0088] S301. Determine whether the preset upshift conditions and preset downshift conditions are met respectively.

[0089] Among them, the preset upshift conditions can be: the current input shaft speed is greater than the input shaft upshift speed, and the current vehicle speed is greater than the upshift speed; the preset downshift conditions can be: the current input shaft speed is less than the input shaft downshift speed, and the current vehicle speed is less than the downshift speed.

[0090] If the preset upshift condition is met, step S302 can be executed; if the preset downshift condition is met, step S303 can be executed.

[0091] S302. Determine that the gear shifting state that the hybrid vehicle needs to enter is the upshift state.

[0092] In practical applications, once the preset upshift conditions are met, it can be determined that the hybrid vehicle needs to enter an upshift state.

[0093] S303. Determine that the gear shifting state that the hybrid vehicle needs to enter is the downshift state.

[0094] In practical applications, once the preset downshifting conditions are met, it can be determined that the hybrid vehicle needs to enter a downshifting state.

[0095] S103, Control the hybrid vehicle to enter the required gear shift state.

[0096] In practical applications, once the shift states that a hybrid vehicle needs to enter are determined, the hybrid vehicle can be controlled to only enter the required shift states.

[0097] It's understandable that motors or engines have a wider operating range relative to vehicle speed. Therefore, determining whether to upshift or downshift based on the input shaft speed is more intuitive, making calibration easier and showcasing the characteristics of different shifting strategies. Furthermore, classifying shifting strategies according to vehicle status and operating conditions ensures the vehicle offers diverse shifting capabilities, improving shifting reliability.

[0098] Based on the above principles, the shift control method provided in this embodiment can be applied to hybrid electric vehicles. This method determines the upshift / downshift parameters of the hybrid electric vehicle according to the target shift type in the target shift mode. These parameters include: input shaft upshift speed, upshift vehicle speed, input shaft downshift speed, and downshift vehicle speed. Based on the current input shaft speed, current vehicle speed, and upshift / downshift parameters, the method determines the shift state the hybrid electric vehicle needs to enter, including upshift and downshift states. The method controls the hybrid electric vehicle to enter the required shift state. In other words, this application can convert the shift judgment from vehicle speed to input shaft speed, considering the actual vehicle speed and the corresponding vehicle speed at the upshift / downshift speed points. Furthermore, the corresponding vehicle speed at the upshift / downshift speed points and the input shaft upshift / downshift judgment speed are still obtained through classification by shift mode and shift type. By reducing the shift frequency through the control strategy, this method not only solves the problem of cyclic shifting caused by triggering shift control judgment solely based on vehicle speed due to the relatively narrow range of vehicle speed compared to the input shaft speed range, but also increases shift adaptability, avoids shift failures under special conditions such as uphill and downhill slopes, and increases shift reliability.

[0099] In practical applications, heavy trucks are prone to problems such as frequent gear shifting and gear shifting failures during starting, turning, and going uphill or downhill due to significant changes in their own characteristics or operating conditions.

[0100] In this regard, based on the above, another embodiment of the shift control method provided in this application is available in the following text. Figure 4 After performing step S101, which determines the upshift / downshift parameters of the hybrid vehicle based on the target shift type in the target shift mode, the process further includes:

[0101] S401. Determine the current vehicle condition parameters of the hybrid vehicle.

[0102] The current vehicle condition parameters include at least one of the following: current load, current curvature, and current road gradient. Specifically, the current load can be the total mass of the current hybrid vehicle.

[0103] In practical applications, the current curvature of a hybrid vehicle can be calculated from the wheel speed or from the steering wheel angle sensor; of course, it is not limited to this and can also be determined according to the application environment and user needs. This application does not make specific limitations, and all of them are within the protection scope of this application.

[0104] S402. Adjust the upshifting and downshifting parameters of the hybrid vehicle according to the current vehicle condition parameters.

[0105] For example, the greater the current load of the hybrid vehicle, the higher the upshifting and downshifting parameters can be adjusted accordingly; the greater the current curvature of the hybrid vehicle, the higher the upshifting and downshifting parameters can also be adjusted accordingly; the greater the current road gradient of the hybrid vehicle, the higher the upshifting and downshifting parameters can also be adjusted accordingly.

[0106] Of course, it is not limited to the above, and can also be determined in combination with the specific application environment and user needs, all of which are within the scope of protection of this application.

[0107] In this embodiment, by adjusting the upshifting and downshifting parameters of the hybrid vehicle based on the current vehicle condition parameters, the upshifting and downshifting parameters of the hybrid vehicle can be made more reasonable, the shifting control accuracy can be higher, the shifting adaptability can be further increased, shifting failures can be avoided under special conditions such as uphill and downhill, and the shifting reliability can be increased.

[0108] In practical applications, current shifting strategies generally determine the required gear based on two parameters: throttle and vehicle speed. However, during the shifting process, the vehicle may be accelerating or decelerating. Shifting at this time may trigger continuous shifting, affecting comfort and increasing the risk of shifting failure.

[0109] In this regard, based on the above, another embodiment of the shift control method provided in this application is available in the following text. Figure 5 Before executing step S103 and controlling the hybrid vehicle to enter the required shift state, the following steps are also included:

[0110] S501. Determine whether the current acceleration of the hybrid vehicle is greater than the corresponding calibration value.

[0111] If the current acceleration of the hybrid vehicle is greater than the calibrated value, the hybrid vehicle is controlled to enter the required shift state.

[0112] In practical applications, if the required shift state is upshifting, it is determined whether the current acceleration of the hybrid vehicle is greater than the preset upshift / downshift calibration value; if the required shift state is downshifting, it is determined whether the current acceleration of the hybrid vehicle is less than the preset downshift calibration value.

[0113] Specifically, the preset upshift calibration value and preset downshift calibration value can be obtained based on historical data of hybrid vehicles and / or empirical values; they can also be predicted using a neural network model based on historical data. This application does not specifically limit them, and they are all within the scope of protection of this application.

[0114] In this embodiment, the current acceleration of the hybrid vehicle can be used to confirm gear shifts, which can further avoid frequent upshifts and downshifts, thus affecting comfort.

[0115] Based on the shift control method provided in the above embodiments, another embodiment of this application also provides a shift control device, which can be applied to hybrid vehicles. Please refer to [link to relevant documentation]. Figure 6 The device includes:

[0116] The first determining unit 101 is used to determine the upshifting and downshifting parameters of the hybrid vehicle according to the target shifting type of the hybrid vehicle in the target shifting mode. The upshifting and downshifting parameters include: input shaft upshifting speed, upshifting speed, input shaft downshifting speed, and downshifting speed.

[0117] The second determining unit 102 is used to determine the shifting state that the hybrid vehicle needs to enter based on the current input shaft speed, current vehicle speed and upshift / downshift parameters of the hybrid vehicle. The shifting state includes upshifting state and downshifting state.

[0118] Control unit 103 is used to control the hybrid vehicle to enter the required gear shift state.

[0119] In some embodiments, the process of determining the target shift type of the hybrid vehicle in the target shift mode includes:

[0120] Based on the current battery charge and high-voltage fault status of the hybrid vehicle, determine the target shift mode of the hybrid vehicle among pure electric shift mode, hybrid shift mode and engine shift mode.

[0121] Identify all shift types under the target shift mode, and then determine the target shift type among all shift types. Shift types include: power shift, economy shift, forced shift, and low-frequency shift.

[0122] In some embodiments, if a high-voltage fault occurs in the hybrid vehicle, the target shift mode of the hybrid vehicle is the engine shift mode.

[0123] The hybrid vehicle does not have a high-voltage fault, and the current battery charge of the hybrid vehicle is greater than the preset battery charge. The target shift mode of the hybrid vehicle is the pure electric shift mode.

[0124] The hybrid vehicle does not have a high-voltage fault, and the current battery charge of the hybrid vehicle is not greater than the preset battery charge. The target shift mode of the hybrid vehicle is the hybrid shift mode.

[0125] In some embodiments, if the hybrid vehicle meets the preset power shift conditions, the target shift type of the hybrid vehicle is power shift. Meeting the preset power shift conditions includes: the current throttle change rate of the hybrid vehicle is within the preset power shift throttle change rate range corresponding to the target shift mode, and / or, the power button of the hybrid vehicle is in the activated state.

[0126] If the hybrid vehicle meets the preset economic shift conditions, the target shift type of the hybrid vehicle is economic shift. Meeting the preset economic shift conditions includes: the current throttle change rate of the hybrid vehicle is within the preset economic shift throttle change rate range corresponding to the target shift mode, and / or, the economic button of the hybrid vehicle is in the activated state.

[0127] If a hybrid vehicle meets the preset forced shift conditions, the target shift type of the hybrid vehicle is forced shift. Meeting the preset forced shift conditions includes: the current throttle change rate of the hybrid vehicle is within the preset forced shift throttle change rate range corresponding to the target shift mode.

[0128] If a hybrid vehicle meets the preset low-frequency shifting conditions, the target shifting type of the hybrid vehicle is low-frequency shifting. Meeting the preset low-frequency shifting conditions includes: the current road gradient of the hybrid vehicle is greater than the preset uphill road gradient corresponding to the target shifting mode, or the current road gradient of the hybrid vehicle is greater than the preset downhill road gradient corresponding to the target shifting mode.

[0129] In some embodiments, the shift control device further includes:

[0130] The third determining unit is used to determine the current vehicle condition parameters of the hybrid vehicle, which include at least one of the following: current load, current curvature, and current road slope;

[0131] The adjustment unit is used to adjust the upshifting and downshifting parameters of the hybrid vehicle based on the current vehicle condition parameters.

[0132] In some embodiments, the second determining unit is specifically used for:

[0133] Determine whether the preset upshift and downshift conditions are met respectively;

[0134] If it is determined that the preset upshift conditions are met, then the shift state that the hybrid vehicle needs to enter is the upshift state.

[0135] If it is determined that the preset downshifting conditions are met, then the hybrid vehicle is determined to enter a downshifting state.

[0136] The preset upshift conditions are: the current input shaft speed is greater than the input shaft upshift speed and the current vehicle speed is greater than the upshift speed. The preset downshift conditions are: the current input shaft speed is less than the input shaft downshift speed and the current vehicle speed is less than the downshift speed.

[0137] In some embodiments, the shift control device further includes:

[0138] The judgment unit is used to determine whether the current acceleration of the hybrid vehicle is greater than the corresponding calibration value;

[0139] If the current acceleration of the hybrid vehicle is greater than the corresponding calibration value, the hybrid vehicle will be controlled to enter the required shift state.

[0140] Based on the above, the shift control device provided in this embodiment can be applied to hybrid electric vehicles. The first determining unit 101 determines the upshift / downshift parameters of the hybrid electric vehicle based on the target shift type in the target shift mode. These parameters include: input shaft upshift speed, upshift vehicle speed, input shaft downshift speed, and downshift vehicle speed. The second determining unit 102 determines the shift state the hybrid electric vehicle needs to enter based on the current input shaft speed, current vehicle speed, and the upshift / downshift parameters. These shift states include upshift and downshift states. The control unit 103 controls the hybrid electric vehicle... When the car enters the required shift state, this application can convert the shift judgment from vehicle speed to input shaft speed, and consider the actual vehicle speed and the vehicle speed corresponding to the shift point. In addition, the vehicle speed corresponding to the shift point and the input shaft shift judgment speed are still obtained by classifying the shift mode and shift type. By reducing the shift frequency through the control strategy, this application not only solves the problem that the vehicle speed range is relatively narrow compared to the input shaft speed range, and the shift control judgment is triggered solely based on vehicle speed, which can easily lead to cyclic shifting, but also increases shift adaptability, avoids shifting failures under special working conditions such as uphill and downhill, and increases shifting reliability.

[0141] It should be noted that the relevant descriptions of each unit in the control device can be found in the corresponding embodiments of the above method, and will not be repeated here.

[0142] Optionally, another embodiment of this application also provides a computer storage medium for storing a computer program, which, when executed, is specifically used to implement the control method provided in any embodiment of this application.

[0143] It should be noted that the relevant explanations regarding the gear shift control method can be found in the above embodiments, and will not be repeated here.

[0144] Alternatively, another embodiment of this application also provides an electronic device including a memory and a processor.

[0145] The memory is used to store computer programs;

[0146] The processor is used to execute computer programs, specifically to implement the shift control method provided in any embodiment of this application.

[0147] In the examples of electronic device types, some controllers for automobiles are added, and the revised version is as follows: Electronic devices in this article can be servers, PCs, PADs, mobile phones, ECUs (Electronic Control Units), VCUs (Vehicle Control Units), MCUs (Micro Controller Units), HCUs (Hybrid Control Units), etc.

[0148] It should be noted that the relevant descriptions of the control method can also be found in the above embodiments, and will not be repeated here.

[0149] The features described in the various embodiments of this specification can be substituted for or combined with each other. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0150] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0151] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0152] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A gear shifting control method, characterized in that, Applied to hybrid vehicles, the method includes: Based on the current battery charge and high-voltage fault status of the hybrid vehicle, determine the target shift mode of the hybrid vehicle among pure electric shift mode, hybrid shift mode and engine shift mode. If the current throttle change rate of the hybrid vehicle is within the preset power shift throttle change rate range corresponding to the target shift mode, and / or the power button of the hybrid vehicle is in the activated state, then it is determined that the hybrid vehicle meets the preset power shift conditions, and the target shift type of the hybrid vehicle is the power shift. If the current throttle change rate of the hybrid vehicle is within the preset economic shift throttle change rate range corresponding to the target shift mode, and / or the economy button of the hybrid vehicle is in the activated state, then it is determined that the hybrid vehicle meets the preset economic shift conditions, and the target shift type of the hybrid vehicle is the economic shift. If the current throttle change rate of the hybrid vehicle is within the preset forced shift throttle change rate range corresponding to the target shift mode, then the hybrid vehicle is determined to meet the preset forced shift condition, and the target shift type of the hybrid vehicle is the forced shift. If the current road gradient of the hybrid vehicle is greater than the preset uphill road gradient corresponding to the target shift mode, or if the current road gradient of the hybrid vehicle is greater than the preset downhill road gradient corresponding to the target shift mode, then the hybrid vehicle is determined to meet the preset low-frequency shift condition, and the target shift type of the hybrid vehicle is the low-frequency shift. Based on the target shift type of the hybrid vehicle in the target shift mode, the upshift and downshift parameters of the hybrid vehicle are determined. The upshift and downshift parameters include: input shaft upshift speed, upshift vehicle speed, input shaft downshift speed, and downshift vehicle speed. Based on the current input shaft speed, current vehicle speed, and upshift / downshift parameters of the hybrid vehicle, the shift state that the hybrid vehicle needs to enter is determined, and the shift state includes upshift state and downshift state. Control the hybrid vehicle to enter the required gear shift state.

2. The shift control method according to claim 1, characterized in that, The hybrid vehicle has a high-voltage fault, and the target shift mode of the hybrid vehicle is the engine shift mode. The hybrid vehicle has no high-voltage fault, and the current battery charge of the hybrid vehicle is greater than the preset battery charge. The target shift mode of the hybrid vehicle is the pure electric shift mode. The hybrid vehicle has no high-voltage fault, and the current battery charge of the hybrid vehicle is not greater than the preset battery charge. The target shift mode of the hybrid vehicle is the hybrid shift mode.

3. The shift control method according to claim 1, characterized in that, After determining the upshift / downshift parameters of the hybrid vehicle based on the target shift type in the target shift mode, the method further includes: Determine the current vehicle condition parameters of the hybrid vehicle, the current vehicle condition parameters including at least one of the following: current load, current curvature, and current road slope; The upshifting and downshifting parameters of the hybrid vehicle are adjusted based on the current vehicle condition parameters.

4. The shift control method according to claim 1, characterized in that, Based on the current input shaft speed, current vehicle speed, and the upshift / downshift parameters of the hybrid vehicle, determine the shift state that the hybrid vehicle needs to enter, including: Determine whether the preset upshift and downshift conditions are met respectively; If it is determined that the preset upshifting conditions are met, then the shifting state that the hybrid vehicle needs to enter is the upshifting state. If it is determined that the preset downshifting conditions are met, then the shifting state that the hybrid vehicle needs to enter is the downshifting state. The preset upshift condition is satisfied when the current input shaft speed is greater than the input shaft upshift speed and the current vehicle speed is greater than the upshift speed. The preset downshift condition is satisfied when the current input shaft speed is less than the input shaft downshift speed and the current vehicle speed is less than the downshift speed.

5. The shift control method according to claim 1, characterized in that, Before controlling the hybrid vehicle to enter the required shift state, the method further includes: Determine whether the current acceleration of the hybrid vehicle is greater than the corresponding calibration value; If the current acceleration of the hybrid vehicle is greater than the corresponding calibration value, the hybrid vehicle is controlled to enter the required shift state.

6. A gear shifting control device, characterized in that, Applied to hybrid vehicles, including: The first determining unit is configured to determine the target shift mode of the hybrid vehicle among pure electric shift mode, hybrid shift mode, and engine shift mode based on the current battery charge and high-voltage fault status of the hybrid vehicle; if the current throttle change rate of the hybrid vehicle is within a preset dynamic shift throttle change rate range corresponding to the target shift mode, and / or the dynamic shift button of the hybrid vehicle is in the activated state, then it is determined that the hybrid vehicle meets the preset dynamic shift condition, and the target shift type of the hybrid vehicle is the dynamic shift; if the current throttle change rate of the hybrid vehicle is within a preset economic shift throttle change rate range corresponding to the target shift mode, and / or the economic shift button of the hybrid vehicle is in the activated state. If the current throttle change rate of the hybrid vehicle is within the preset forced shift throttle change rate range corresponding to the target shift mode, then the hybrid vehicle is determined to meet the preset forced shift condition, and the target shift type of the hybrid vehicle is the forced shift; if the current road gradient of the hybrid vehicle is greater than the preset uphill road gradient corresponding to the target shift mode, or if the current road gradient of the hybrid vehicle is greater than the preset downhill road gradient corresponding to the target shift mode, then the hybrid vehicle is determined to meet the preset low-frequency shift condition, and the target shift type of the hybrid vehicle is the low-frequency shift. Based on the target shift type of the hybrid vehicle in the target shift mode, the upshift and downshift parameters of the hybrid vehicle are determined. The upshift and downshift parameters include: input shaft upshift speed, upshift vehicle speed, input shaft downshift speed, and downshift vehicle speed. The second determining unit is used to determine the shifting state that the hybrid vehicle needs to enter based on the current input shaft speed, current vehicle speed and the upshift / downshift parameters. The shifting state includes upshifting and downshifting. The control unit is used to control the hybrid vehicle to enter the required gear shift state.

7. An electronic device, characterized in that, include: Memory and processor; The memory is used to store computer programs; The processor is used to execute the computer program, specifically to implement the shift control method as described in any one of claims 1-5.

8. A computer storage medium, characterized in that, Used to store a computer program, which, when executed, is specifically used to implement the shift control method as described in any one of claims 1-5.

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