Shift control methods, devices, electronic equipment and media for hybrid vehicles

Abstract

This application discloses a shift control method, device, electronic equipment, and medium for hybrid vehicles, relating to the field of automotive electronics technology. If the vehicle is detected to be in the process of shifting gears and the engine exhibits smoke limitation, a target calibration time corresponding to the current gearbox gear is determined based on a preset correspondence between gear and calibration time. Based on the engine's current target smoke point torque value and the target torque upper limit corresponding to the current engine speed, a first vehicle-wide torque demand value is determined for at least one target moment within the target calibration time. For any target moment, upon arrival, the motor's output torque value is adjusted according to the first vehicle-wide torque demand value at that target moment, ensuring that the sum of the motor's output torque value and the engine's output torque value at the target moment is less than or equal to the first vehicle-wide torque demand value at the target moment. This method can effectively improve the power stability during gear shifting.

Description

Technical Field

[0001] This application relates to the field of automotive electronics technology, and in particular to a method, device, electronic equipment and medium for shift control of hybrid vehicles. Background Technology

[0002] To meet increasingly stringent emission standards, China VI engines are now equipped with DPF particulate filters to capture carbon soot particles in the exhaust. Compared to the China V emission stage, the DPF is usually larger based on the fuel injection limit coefficient, which causes the torque limit to appear too early in the shifting torque return process of AMT vehicles.

[0003] Hybrid vehicles are equipped with an engine controller (ECU), a vehicle controller (HCU), a motor controller (MCU), etc., and these controllers can work together.

[0004] In related technologies, the shift control process of hybrid vehicles often uses various controllers to keep the vehicle operating below the torque limit imposed by smoke opacity limits. This can lead to a decrease in overall vehicle power, especially on inclines, where the limited engine torque output can cause frequent upshifts and downshifts, and in severe cases, even stalling. Therefore, improving the power stability of the shift process is of great significance for hybrid vehicles. Summary of the Invention

[0005] This application provides a shift control method, device, electronic equipment, and medium for hybrid vehicles, which can coordinate the motor to output additional torque based on the engine output torque when the engine smoke limit occurs during the return torque phase, effectively improving the power stability of the shifting process.

[0006] In a first aspect, embodiments of this application provide a shift control method for a hybrid vehicle, the method comprising:

[0007] If the vehicle is detected to be in the process of shifting gears and the engine is experiencing smoke limitation, the target calibration time corresponding to the current gearbox gear is determined according to the preset correspondence between gear and calibration time; the calibration time represents the time required to increase the engine torque from the smoke point torque value to the upper limit torque value.

[0008] Based on the current target smoke point torque value of the engine and the target torque upper limit value corresponding to the current engine speed, determine the first vehicle required torque value at at least one target moment within the target calibration period;

[0009] For any target time, after the target time is reached, the output torque value of the motor is adjusted according to the first vehicle required torque value at the target time, so that the sum of the output torque value of the motor and the output torque value of the engine at the target time is less than or equal to the first vehicle required torque value at the target time.

[0010] The above method, if it detects that the vehicle is in the process of shifting gears and the engine has smoke limitations, then according to the preset correspondence between gear and calibration duration, determines the target calibration duration corresponding to the gearbox gear at the current moment; the calibration duration represents the time required to increase the engine torque from the smoke point torque value to the upper limit torque value; based on the current target smoke point torque value of the engine and the target upper limit torque value corresponding to the current engine speed, determines the first vehicle required torque value at at least one target moment within the target calibration duration; for any target moment, after the target moment is reached, based on the first vehicle required torque value at the target moment, adjusts the output torque value of the motor so that the sum of the output torque value of the motor and the output torque value of the engine at the target moment is less than or equal to the first vehicle required torque value at the target moment. This method, if it detects that the vehicle is in the process of shifting gears and the engine is experiencing smoke limitations, determines the target calibration time and the first vehicle torque demand value at at least one target moment within the target calibration time. Based on the first vehicle torque demand value at the target moment, it adjusts the output torque value of the motor so that the sum of the output torque value of the motor and the output torque value of the engine at the target moment is less than or equal to the first vehicle torque demand value at the target moment. This allows the motor to provide additional torque output based on the engine output torque when the engine experiences smoke limitations during the return torque phase, effectively improving the power stability of the shifting process.

[0011] In one possible implementation, after determining the target calibration duration corresponding to the gearbox gear at the current moment, and before determining the first vehicle required torque value at at least one target moment within the target calibration duration, the method further includes:

[0012] The current torque value of the engine is used as the current target smoke point torque value of the engine; and

[0013] Based on the preset mapping relationship between engine speed and torque upper limit, the target torque upper limit corresponding to the current engine speed is determined.

[0014] The above method uses the current torque value of the engine as the current target smoke point torque value of the engine; and determines the target torque upper limit value corresponding to the current engine speed based on a preset mapping relationship between engine speed and torque upper limit value. This method can more simply and efficiently determine the current target smoke point torque value and target torque upper limit value of the engine, reduce the amount of calculation in the shift control process of hybrid vehicles, and effectively improve the power stability of the shift process.

[0015] In one possible implementation, determining the first vehicle required torque value at at least one target moment within the target calibration period, based on the engine's current target smoke point torque value and the target torque upper limit value corresponding to the current engine speed, includes:

[0016] Based on the target calibration time, the target smoke point torque value, and the target torque upper limit value, establish a correspondence between time and torque value;

[0017] For any target time, the torque value corresponding to the target time is determined based on the correspondence, and the determined torque value is used as the first vehicle required torque value corresponding to the target time, wherein adjacent target times are separated by a set interval.

[0018] The above method establishes a correspondence between time and torque value based on the target calibration duration, the target smoke point torque value, and the target torque upper limit value. For any target moment, the torque value corresponding to that target moment is determined based on the correspondence, and the determined torque value is used as the first vehicle required torque value for that target moment, wherein adjacent target moments differ by a set interval. In determining the first vehicle required torque value for at least one target moment within the target calibration duration based on the engine's current target smoke point torque value and the target torque upper limit value corresponding to the current engine speed, this method first establishes a correspondence between time and torque value, then determines the torque value corresponding to any target moment based on the correspondence, obtaining the first vehicle required torque value for that target moment, wherein adjacent target moments differ by a set interval. This achieves a simple and efficient determination of the first vehicle required torque value for at least one target moment within the target calibration duration, further reducing the computational load of the shift control process in hybrid vehicles and more effectively improving the power stability of the shift process.

[0019] In one possible implementation, after adjusting the motor's output torque value based on the first vehicle-wide torque demand value at the target time, the step of adjusting the motor's output torque value according to the target time, for any given target time, further includes:

[0020] After the target calibration period, the output torque value of the motor is periodically adjusted based on the second vehicle torque demand value, so that the sum of the adjusted output torque value of the motor and the output torque value of the engine at the adjustment time is less than or equal to the second vehicle torque demand value; wherein the second vehicle torque demand value is the target torque upper limit value.

[0021] The above method further includes: after the target calibration duration, periodically adjusting the output torque value of the motor based on a second vehicle-wide torque requirement value, such that the sum of the adjusted motor output torque value and the engine output torque value at the adjustment time is less than or equal to the second vehicle-wide torque requirement value; wherein the second vehicle-wide torque requirement value is the target torque upper limit value. This method, after the target calibration duration, periodically adjusts the motor output torque value based on a second vehicle-wide torque requirement value, such that the sum of the adjusted motor output torque value and the engine output torque value at the adjustment time is less than or equal to the second vehicle-wide torque requirement value. This allows for periodic adjustment of the motor output torque value based on the target torque upper limit value after the target calibration duration. When the engine experiences smoke limitations during the return torque phase, it more easily coordinates the motor to provide additional torque output based on the engine output torque, effectively improving the power stability during gear shifting.

[0022] In one possible implementation, the method further includes:

[0023] After the target calibration time, it is periodically determined whether the difference between the engine's output torque value and the target torque upper limit value is less than or equal to a preset threshold.

[0024] If the result of the judgment is yes, then stop adjusting the output torque value of the motor based on the second vehicle demand torque value periodically, and control the motor to stop outputting torque value.

[0025] The above method, after the target calibration period, periodically determines whether the difference between the engine's output torque value and the target torque upper limit is less than or equal to a preset threshold. If the determination result is yes, then the periodic adjustment of the motor's output torque value based on the second vehicle torque demand value is stopped, and the motor is controlled to stop outputting torque. This method can, after the target calibration period, stop adjusting the motor's output torque value based on the second vehicle torque demand value and control the motor to stop outputting torque when the difference between the engine's output torque value and the target torque upper limit is less than or equal to the preset threshold, thereby providing a motor torque introduction and withdrawal mechanism. This not only ensures the vehicle's power performance but also improves driving comfort and effectively enhances the power stability during gear shifting.

[0026] Secondly, embodiments of this application provide a shift control device for a hybrid vehicle, the device comprising:

[0027] The target duration determination unit is used to determine the target calibration duration corresponding to the current gearbox gear based on the preset correspondence between gear and calibration duration if the vehicle is detected to be in the process of shifting gears and the engine smoke limit is detected; the calibration duration represents the time it takes to increase the engine torque from the smoke point torque value to the upper limit torque value.

[0028] The required torque determination unit is used to determine the first vehicle required torque value at at least one target moment within the target calibration period based on the current target smoke point torque value of the engine and the target torque upper limit value corresponding to the current engine speed.

[0029] The torque coordination control unit is used to adjust the output torque value of the motor according to the first vehicle demand torque value at the target time after the target time is reached, so that the sum of the output torque value of the motor and the output torque value of the engine at the target time is less than or equal to the first vehicle demand torque value at the target time.

[0030] In one possible implementation, the required torque determining unit is further configured to:

[0031] The current torque value of the engine is used as the current target smoke point torque value of the engine; and

[0032] Based on the preset mapping relationship between engine speed and torque upper limit, the target torque upper limit corresponding to the current engine speed is determined.

[0033] In one possible implementation, the required torque determination unit is specifically used for:

[0034] Based on the target calibration time, the target smoke point torque value, and the target torque upper limit value, establish a correspondence between time and torque value;

[0035] For any target time, the torque value corresponding to the target time is determined based on the correspondence, and the determined torque value is used as the first vehicle required torque value corresponding to the target time, wherein adjacent target times are separated by a set interval.

[0036] In one possible implementation, the torque coordination control unit is further configured to:

[0037] After the target calibration period, the output torque value of the motor is periodically adjusted based on the second vehicle torque demand value, so that the sum of the adjusted output torque value of the motor and the output torque value of the engine at the adjustment time is less than or equal to the second vehicle torque demand value; wherein the second vehicle torque demand value is the target torque upper limit value.

[0038] In one possible implementation, the torque coordination control unit is further configured to:

[0039] After the target calibration time, it is periodically determined whether the difference between the engine's output torque value and the target torque upper limit value is less than or equal to a preset threshold.

[0040] If the result of the judgment is yes, then stop adjusting the output torque value of the motor based on the second vehicle demand torque value periodically, and control the motor to stop outputting torque value.

[0041] Thirdly, an electronic device is provided, including a processor and a memory, wherein the memory stores program code that, when executed by the processor, causes the processor to perform the steps of the gear shift control method for a hybrid vehicle described above.

[0042] Fourthly, a computer-readable storage medium is provided, wherein a computer program is stored therein, and when the computer program is executed by a processor, it implements the gear shifting control method for a hybrid vehicle as described above.

[0043] The technical effects of any of the implementation methods in the second to fourth aspects can be found in the technical effects of the implementation method in the first aspect, and will not be repeated here. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 A schematic flowchart illustrating a gear shift control method for a hybrid vehicle provided in an embodiment of this application;

[0046] Figure 2 A schematic flowchart of another hybrid vehicle shift control method provided in this application embodiment;

[0047] Figure 3 A schematic diagram of the structure of a gear shift control device for a hybrid vehicle provided in an embodiment of this application;

[0048] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] The following explanations of some terms used in the embodiments of this application are provided to facilitate understanding by those skilled in the art.

[0051] (1) HCU: (Hybrid Control Unit): HCU, also known as "hybrid controller" or "vehicle controller", is the core control component of the entire vehicle. It collects accelerator pedal signals, brake pedal signals and other component signals, makes corresponding judgments, and controls the actions of the lower-level component controllers to drive the vehicle normally.

[0052] (2) Maximum torque value: The maximum torque value is the maximum torque of the engine at the operating speed, that is, the maximum torque value produced when the throttle is fully open at a certain engine speed.

[0053] (3) SOC (State of Charge): SOC reflects the remaining capacity of a battery. Numerically, it is defined as the ratio of remaining capacity to the total battery capacity, usually expressed as a percentage. Its value ranges from 0 to 1. When SOC = 0, the battery is fully discharged; when SOC = 1, the battery is fully charged. The specific value of the battery's SOC is related to parameters such as the battery terminal voltage, charging / discharging current, and internal resistance.

[0054] (4) BMS (Battery Management System): The Battery Management System (BMS) is a crucial link connecting the vehicle's power battery and the electric vehicle. The BMS collects, processes, and stores important information during the battery pack's operation in real time, exchanges information with external devices such as the vehicle control unit (HCU), and addresses key issues related to battery system safety, availability, usability, and lifespan. Its main functions are to improve battery utilization, prevent overcharging and over-discharging, extend battery life, and monitor battery status.

[0055] To reduce vehicle malfunctions during gear shifting in hybrid vehicles and improve power stability during gear shifting, this application provides a gear shifting control method, device, electronic equipment, and medium for hybrid vehicles. To better understand the technical solution provided in this application, the basic principles of the solution are briefly explained below.

[0056] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0057] The technical solutions provided by the embodiments of this application are described below with reference to the accompanying drawings.

[0058] To meet increasingly stringent emission standards, China VI engines are now equipped with DPF particulate filters to capture carbon soot particles in the exhaust. Compared to the China V emission stage, the DPF is usually larger based on the fuel injection limit coefficient, which causes the torque limit to appear too early in the shifting torque return process of AMT vehicles.

[0059] Hybrid vehicles are equipped with an engine controller (ECU), a vehicle controller (HCU), a motor controller (MCU), etc., and these controllers can work together.

[0060] In related technologies, the shift control process of hybrid vehicles often uses various controllers to keep the vehicle operating below the torque limit imposed by smoke opacity limits. This can lead to a decrease in overall vehicle power, especially on inclines, where the limited engine torque output can cause frequent upshifts and downshifts, and in severe cases, even stalling. Therefore, improving the power stability of the shift process is of great significance for hybrid vehicles.

[0061] In view of this, embodiments of this application provide a shift control method, device, electronic device, and medium for a hybrid vehicle. If the vehicle is detected to be in the process of shifting gears and the engine exhibits smoke limitation, a target calibration duration corresponding to the current gearbox gear is determined according to a preset correspondence between gear and calibration duration. The calibration duration represents the time required to increase the engine torque from the smoke point torque value to the upper limit torque value. Based on the current target smoke point torque value of the engine and the target upper limit torque value corresponding to the current engine speed, a first vehicle required torque value for at least one target moment within the target calibration duration is determined. For any target moment, after the target moment is reached, the output torque value of the motor is adjusted according to the first vehicle required torque value of the target moment, so that the sum of the output torque value of the motor and the output torque value of the engine at the target moment is less than or equal to the first vehicle required torque value at the target moment. This method, if it detects that the vehicle is in the process of shifting gears and the engine is experiencing smoke limitations, determines the target calibration time and the first vehicle torque demand value at at least one target moment within the target calibration time. Based on the first vehicle torque demand value at the target moment, it adjusts the output torque value of the motor so that the sum of the output torque value of the motor and the output torque value of the engine at the target moment is less than or equal to the first vehicle torque demand value at the target moment. This enables the motor to output additional torque based on the engine output torque when the engine experiences smoke limitations during the return torque phase, effectively improving the power stability of the shifting process.

[0062] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application. Furthermore, the embodiments and features described in the embodiments of this application can be combined with each other without conflict.

[0063] The shift control method for hybrid vehicles provided in the embodiments of this application will be further explained below. Figure 1 As shown, it includes the following steps:

[0064] Step S101: If the vehicle is detected to be in the process of shifting gears and the engine is experiencing smoke limitations, then the target calibration time corresponding to the current gearbox gear is determined according to the preset correspondence between gear and calibration time.

[0065] Among them, the calibration duration represents the time it takes for the engine torque to increase from the smoke point torque value to the upper limit torque value.

[0066] In practice, the HCU can monitor in real time whether the vehicle is in the process of shifting gears and whether the engine is experiencing smoke opacity limitations. If the vehicle is detected to be in the process of shifting gears and the engine is experiencing smoke opacity limitations, the target calibration duration corresponding to the current gearbox gear is determined based on the preset correspondence between gear and calibration duration. The calibration duration represents the time required to increase the engine torque from the smoke point torque value to the upper torque limit value.

[0067] For example, if the HCU detects that the vehicle is in the process of shifting gears and the engine is experiencing smoke limitations, it determines the gearbox gear at the current time t0 based on the preset correspondence between gear and calibration time s_p. i The corresponding target calibration duration is Target_s_p. Here, s_p represents the time required to increase the engine torque from the smoke point torque value to the upper torque limit value.

[0068] Table 1 illustrates an example of the correspondence between gear positions and calibration duration s_p.

[0069] Table 1

[0070] Calibration length s_p <![CDATA[t1]]> <![CDATA[t2]]> <![CDATA[t3]]> … <![CDATA[t i ]]>

[0071] Referring to Table 1, assume the gearbox gear position g at the current time t0 is... i The value is gear 3 in Table 1; if the HCU detects that the vehicle is in the process of shifting gears and the engine has smoke limitation, then according to the preset correspondence between gear and calibration time s_p shown in Table 1, it determines the target calibration time Target_s_p corresponding to gear 3 at the current time t0. According to Table 1, the value of the target calibration time Target_s_p at this time is t3. For example, t3 can be 5s.

[0072] In the embodiments of this application, after determining the target calibration duration corresponding to the gearbox gear at the current moment, the current target smoke point torque value and the target torque upper limit value of the engine can be determined.

[0073] In one possible implementation, after determining the target calibration duration corresponding to the gearbox gear at the current moment in step S101, the following process is performed: taking the current torque value of the engine as the current target smoke point torque value of the engine; and determining the target torque upper limit value corresponding to the current engine speed based on the preset mapping relationship between engine speed and torque upper limit value.

[0074] In practice, the preset mapping relationship between engine speed and upper torque limit can be determined based on the engine MAP diagram obtained through bench testing of the engine. The engine MAP diagram includes the mapping relationship between engine speed and upper torque limit.

[0075] The target smoke point torque value and target torque upper limit value in the above embodiments can be used to determine the first vehicle required torque value at at least one target moment within the target calibration time.

[0076] Step S102: Based on the current target smoke point torque value of the engine and the target torque upper limit value corresponding to the current engine speed, determine the first vehicle required torque value at at least one target moment within the target calibration time.

[0077] In practice, after determining the target calibration duration corresponding to the gearbox gear at the current moment, the HCU determines the first vehicle required torque value at at least one target moment within the target calibration duration based on the current target smoke point torque value of the engine and the target torque upper limit value corresponding to the current engine speed.

[0078] For example, based on the engine's current target smoke point torque value Target_sp_tor and the target torque upper limit value Target_max_tor corresponding to the current engine speed speed_i, the first vehicle demand torque value tor_vn_1 is determined at least one target moment Target_tp within the target calibration duration Target_s_p.

[0079] In one possible implementation, step S102, determining the first vehicle required torque value at at least one target moment within the target calibration period based on the engine's current target smoke point torque value and the target torque upper limit value corresponding to the current engine speed, can be achieved through the following steps:

[0080] Step A01: Establish the correspondence between time and torque value based on the target calibration time, target smoke point torque value, and target torque upper limit value.

[0081] For example, a correspondence between time and torque value is established based on the target calibration time Target_s_p, the target smoke point torque value Target_sp_tor, and the target torque upper limit value Target_max_tor.

[0082] In some embodiments of this application, the correspondence between time and torque value can correspond to a linear equation that linearly increases the torque from the target smoke point torque value to the target torque upper limit value within the target calibration time period. For example, it can be shown in the following formula:

[0083]

[0084] in,

[0085] t0 represents the moment when the vehicle was detected to be shifting gears and the engine was showing smoke opacity limitations; this is marked as the current moment.

[0086] Target_max_tor represents the upper limit of the target torque of the engine;

[0087] Target_sp_tor represents the target smoke point torque value of the engine;

[0088] Target_s_p represents the target calibration time corresponding to the gear position of the transmission at the current moment;

[0089] time represents any point in time within a time period starting from t0 and with the target time being specified.

[0090] Understandably, in some other embodiments of this application, the correspondence between time and torque value may also correspond to a nonlinear equation that nonlinearly increases the torque from the target smoke point torque value to the target torque upper limit value within the target calibration time.

[0091] Step A02: For any target time, determine the torque value corresponding to any target time based on the correspondence, and use the determined torque value as the first vehicle required torque value corresponding to any target time, wherein adjacent target times are separated by a set interval.

[0092] For example, for any target time Target_tp, the torque value corresponding to any target time Target_tp is determined based on the correspondence time-torque, and the determined torque value is used as the first vehicle required torque value tor_vn_1 corresponding to any target time Target_tp, where the difference between any two adjacent target times is a set interval per_set. For example, the value of the set interval per_set can be 5ms, 10ms, 0.1s, etc.

[0093] Step S103: For any target time, after the target time is reached, adjust the output torque value of the motor according to the first vehicle torque requirement value at the target time, so that the sum of the output torque value of the motor and the output torque value of the engine at the target time is less than or equal to the first vehicle torque requirement value at the target time.

[0094] In practice, the motor's output torque is limited by its maximum output torque. For any given target time, upon arrival, the motor's required torque is determined based on the first vehicle-wide torque requirement at that target time. If this required torque is less than or equal to the maximum output torque, the motor's output torque equals the required torque, ensuring that the sum of the motor's output torque and the engine's output torque at the target time equals the first vehicle-wide torque requirement at that time. Conversely, if the required torque is greater than the maximum output torque, the motor's output torque equals the maximum output torque, ensuring that the sum of the motor's output torque and the engine's output torque at the target time is less than the first vehicle-wide torque requirement at that time.

[0095] In this embodiment, for any target time, after the target time is reached, the output torque value of the motor is controlled according to the first vehicle torque requirement value at the target time. Specifically, the process of controlling the motor's output torque value according to the first vehicle torque requirement value at the target time prioritizes ensuring that the sum of the motor's output torque value and the engine's output torque value at the target time equals the first vehicle torque requirement value at the target time. If the motor's output torque value at the target time is the maximum output torque value, then the process of controlling the motor's output torque value according to the first vehicle torque requirement value at the target time ensures that the sum of the motor's output torque value and the engine's output torque value at the target time is less than or equal to the first vehicle torque requirement value at the target time.

[0096] The method in the above embodiment, if it is detected that the vehicle is in the process of shifting gears and the engine exhibits smoke limitation, then, based on the preset correspondence between gear and calibration duration, determines the target calibration duration corresponding to the current gearbox gear; based on the current target smoke point torque value of the engine and the target torque upper limit value corresponding to the current engine speed, it determines the first vehicle required torque value at at least one target moment within the target calibration duration; for any target moment, after the target moment is reached, based on the first vehicle required torque value of the target moment, it adjusts the output torque value of the motor so that the sum of the output torque value of the motor and the output torque value of the engine at the target moment is less than or equal to the first vehicle required torque value at the target moment. This method can effectively improve the power stability during the gear shifting process.

[0097] In some embodiments of this application, the hybrid vehicle monitors the state of charge (SOC) of the motor's power battery through the battery management system (BMS). For any target time, after the target time is reached, if the SOC of the motor's power battery is lower than a preset calibration value, the first vehicle torque demand value based on the target time is stopped, the output torque value of the motor is adjusted, and the motor is controlled to stop outputting torque.

[0098] In one possible implementation, the process of adjusting the motor's output torque value based on the first vehicle torque demand value at the target time is specifically achieved through the following steps:

[0099] Step B01: Based on the first vehicle torque demand value at the target time and the engine output torque value at the target time, obtain the estimated torque value of the motor.

[0100] The estimated torque value represents the estimated torque value that the motor needs to provide.

[0101] Step B02: Based on the estimated torque value and the maximum output torque of the motor, obtain the actual controlled torque value of the motor.

[0102] In practice, if the estimated torque value is less than or equal to the maximum output torque of the motor, then the actual controlled torque value of the motor is equal to the estimated torque value; if the estimated torque value is greater than the maximum output torque of the motor, then the actual controlled torque value of the motor is equal to the maximum output torque of the motor.

[0103] Step B03: Adjust the motor's output torque value to the actual controlled torque value.

[0104] Specifically, the hybrid vehicle adjusts the output torque value of the motor to make the output torque value of the motor become the actual controlled torque value, that is, to make the output torque value of the hybrid vehicle's motor consistent with the actual controlled torque value.

[0105] In one possible implementation, in step S103, for any target time, after the target time is reached, after adjusting the output torque value of the motor according to the first vehicle torque demand value at the target time, the following steps are also performed: after the target calibration time, the output torque value of the motor is periodically adjusted based on the second vehicle torque demand value, so that the sum of the adjusted output torque value of the motor and the output torque value of the engine at the adjustment time is less than or equal to the second vehicle torque demand value; wherein the second vehicle torque demand value is the upper limit of the target torque.

[0106] In specific implementation, the period used in the process of adjusting the motor's output torque value based on the second vehicle demand torque value cycle can be consistent with the preset interval for the time difference between adjacent target moments during the process of determining the first vehicle demand torque value at least one target moment within the target calibration time based on the engine's current target smoke point torque value and the target torque upper limit value corresponding to the current engine speed. For example, when the preset interval for the time difference between adjacent target moments is 10ms, the period used in the process of adjusting the motor's output torque value based on the second vehicle demand torque value cycle is also 10ms.

[0107] In one possible implementation, after the target calibration period, during the process of adjusting the motor's output torque value based on the second vehicle demand torque value cycle, the following steps are also performed:

[0108] Step C01: After the target calibration time, periodically determine whether the difference between the engine's output torque value and the target torque upper limit value is less than or equal to a preset threshold.

[0109] In step C02, if the result of the judgment is yes, then stop adjusting the output torque value of the motor based on the second vehicle demand torque value periodically, and control the motor to stop outputting the torque value.

[0110] One possible implementation also includes: after the target calibration period, if the accelerator pedal is detected to decrease, and / or the engine is not detected to have reached the smoke limit, then the adjustment of the motor's output torque value based on the second vehicle demand torque value cycle is stopped, and the motor's output torque value is controlled to decrease according to a preset calibration slope.

[0111] In practice, after the target calibration period, the output torque value of the control motor is reduced according to a preset calibration slope, which can be to reduce the output torque value of the motor by a first torque adjustment amount. This first torque adjustment amount can be determined based on the calibration slope and the period used in adjusting the output torque value of the motor according to the second vehicle demand torque value cycle.

[0112] In one possible implementation, it further includes: for any target time, after the target time is reached, if the accelerator pedal is detected to decrease and / or the engine is detected not to have a smoke limit, then the adjustment of the motor's output torque value according to the first vehicle demand torque value at the target time is stopped, and the motor's output torque value is controlled to decrease according to a preset calibration slope.

[0113] In practice, for any target time, after the target time is reached, the output torque value of the control motor is reduced according to a preset calibration slope. This can be achieved by reducing the output torque value of the motor by a second torque adjustment amount. This second torque adjustment amount can be determined based on the calibration slope and the set interval between adjacent target times.

[0114] The hybrid vehicle shift control method of the above embodiment, if it is detected that the vehicle is in the process of shifting gears and the engine has smoke limitation, then according to the preset correspondence between gear and calibration duration, determines the target calibration duration corresponding to the gear of the transmission at the current moment; the calibration duration represents the time required to increase the engine torque from the smoke point torque value to the upper limit torque value; according to the current target smoke point torque value of the engine and the target upper limit torque value corresponding to the current engine speed, determines the first vehicle demand torque value at at least one target moment within the target calibration duration; for any target moment, after the target moment is reached, according to the first vehicle demand torque value of the target moment, adjusts the output torque value of the motor so that the sum of the output torque value of the motor and the output torque value of the engine at the target moment is less than or equal to the first vehicle demand torque value at the target moment. This method, if it detects that the vehicle is in the process of shifting gears and the engine is experiencing smoke limitations, determines the target calibration time and the first vehicle torque demand value at at least one target moment within the target calibration time. Based on the first vehicle torque demand value at the target moment, it adjusts the output torque value of the motor so that the sum of the output torque value of the motor and the output torque value of the engine at the target moment is less than or equal to the first vehicle torque demand value at the target moment. This enables the motor to output additional torque based on the engine output torque when the engine experiences smoke limitations during the return torque phase, effectively improving the power stability of the shifting process.

[0115] The following describes another gear shift control method for a hybrid vehicle provided by an embodiment of this application. This gear shift control method for a hybrid vehicle is as follows: Figure 2 As shown, it includes the following steps:

[0116] Step S201: If it is detected that the vehicle is in the process of shifting gears and the engine has smoke limitation, then the target calibration time corresponding to the current gear of the transmission is determined according to the preset correspondence between gear and calibration time.

[0117] Among them, the calibration duration represents the time it takes for the engine torque to increase from the smoke point torque value to the upper limit torque value.

[0118] Step S202: The current torque value of the engine is taken as the current target smoke point torque value of the engine; and the target torque upper limit value corresponding to the current engine speed is determined based on the preset mapping relationship between engine speed and torque upper limit value.

[0119] Step S203: Establish the correspondence between time and torque value based on the target calibration time, target smoke point torque value, and target torque upper limit value.

[0120] Step S204: For any target time, determine the torque value corresponding to any target time based on the correspondence, and use the determined torque value as the first vehicle required torque value corresponding to any target time, wherein adjacent target times are separated by a set interval.

[0121] Step S205: For any target time, after the target time is reached, adjust the output torque value of the motor according to the first vehicle torque requirement value at the target time, so that the sum of the output torque value of the motor and the output torque value of the engine at the target time is less than or equal to the first vehicle torque requirement value at the target time.

[0122] Step S206: After the target calibration time, adjust the output torque value of the motor periodically based on the second vehicle torque demand value, so that the sum of the adjusted output torque value of the motor and the output torque value of the engine at the adjustment time is less than or equal to the second vehicle torque demand value; wherein the second vehicle torque demand value is the upper limit of the target torque.

[0123] Step S207: After the target calibration time, periodically determine whether the difference between the engine's output torque value and the target torque upper limit value is less than or equal to a preset threshold; if the result of the determination is yes, then stop periodically adjusting the motor's output torque value based on the second vehicle demand torque value, and control the motor to stop outputting torque value.

[0124] The process of shift control of the hybrid vehicle in steps S201 to S207 can be performed with reference to the specific process of the aforementioned embodiment, and the similarities will not be repeated here.

[0125] The aforementioned gear shift control method for hybrid vehicles is simple and easy to implement. It achieves the purpose of gear shift control for hybrid vehicles through program settings, optimizes the gear shift control of hybrid vehicles, and realizes that after the target calibration time, when the difference between the engine output torque value and the target torque upper limit value is less than or equal to a preset threshold, the adjustment of the motor output torque value based on the second vehicle demand torque value cycle is stopped, and the motor is controlled to stop outputting torque value. This provides a motor torque introduction and withdrawal mechanism, which not only ensures the power performance of the whole vehicle, but also improves driving comfort, effectively improves the power stability of the gear shifting process, enhances the stability of the hybrid vehicle, and improves the driving safety of the gear shifting process of the hybrid vehicle.

[0126] Based on the same inventive concept, embodiments of this application also provide a gear shift control device for a hybrid vehicle. For example... Figure 3 As shown, the device includes:

[0127] The target duration determination unit 301 is used to determine the target calibration duration corresponding to the current gear position of the transmission based on the preset correspondence between gear position and calibration duration if the vehicle is detected to be in the process of shifting gears and the engine smoke limit is detected. The calibration duration represents the time required to increase the engine torque from the smoke point torque value to the upper limit torque value.

[0128] The demand torque determination unit 302 is used to determine the first vehicle demand torque value at at least one target moment within the target calibration time based on the current target smoke point torque value of the engine and the target torque upper limit value corresponding to the current engine speed.

[0129] The torque coordination control unit 303 is used to adjust the output torque value of the motor according to the first vehicle torque demand value at the target time after the target time is reached, so that the sum of the output torque value of the motor and the output torque value of the engine at the target time is less than or equal to the first vehicle torque demand value at the target time.

[0130] In one possible implementation, the demand torque determining unit 302 is further used for:

[0131] Use the engine's current torque value as the engine's current target smoke point torque value; and

[0132] Based on the preset mapping relationship between engine speed and torque upper limit, the target torque upper limit corresponding to the current engine speed is determined.

[0133] In one possible implementation, the demand torque determination unit 302 is specifically used for:

[0134] Establish the correspondence between time and torque value based on the target calibration time, target smoke point torque value, and target torque upper limit value;

[0135] For any target time, the torque value corresponding to any target time is determined based on the correspondence, and the determined torque value is used as the first vehicle required torque value corresponding to any target time, wherein adjacent target times are separated by a set interval.

[0136] In one possible implementation, the torque coordination control unit 303 is also used for:

[0137] After the target calibration period, the output torque value of the motor is periodically adjusted based on the second vehicle torque demand value, so that the sum of the adjusted output torque value of the motor and the output torque value of the engine at the adjustment time is less than or equal to the second vehicle torque demand value; where the second vehicle torque demand value is the upper limit of the target torque.

[0138] In one possible implementation, the torque coordination control unit 303 is also used for:

[0139] After the target calibration time, periodically check whether the difference between the engine's output torque value and the target torque upper limit value is less than or equal to a preset threshold.

[0140] If the judgment result is yes, then stop adjusting the output torque value of the motor based on the second vehicle demand torque value cycle, and control the motor to stop outputting torque value.

[0141] Based on the same technical concept, this application also provides an electronic device, referring to... Figure 4 As shown, the electronic device is used to implement the methods described in the above-described method embodiments, for example, implementing... Figure 1 The method shown allows the electronic device to include a memory 401, a processor 402, an input unit 403, and a display panel 404.

[0142] The memory 401 stores computer programs executed by the processor 402. The memory 401 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, applications required for at least one function, etc.; the data storage area may store data created based on the use of the electronic device, etc. The processor 402 may be a central processing unit (CPU) or a digital processing unit, etc. The input unit 403 may be used to acquire user input instructions. The display panel 404 is used to display information input by the user or information provided to the user. In this embodiment, the display panel 404 is mainly used to display the display interfaces of various applications in the terminal device and the control entities displayed in each display interface. Optionally, the display panel 404 may be configured as a liquid crystal display (LCD) or an OLED (organic light-emitting diode), etc.

[0143] This application embodiment does not limit the specific connection medium between the memory 401, processor 402, input unit 403, and display panel 404 described above. This application embodiment... Figure 4 The memory 401, processor 402, input unit 403, and display panel 404 are connected via a bus 405, and the bus 405 is in... Figure 4 The connections between other components are shown in thick lines only and are not intended to be limiting. The 405 bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, Figure 4 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0144] Memory 401 may be volatile memory, such as random-access memory (RAM); memory 401 may also be non-volatile memory, such as read-only memory, flash memory, hard disk drive (HDD), or solid-state drive (SSD); or memory 401 may be any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto. Memory 401 may be a combination of the above-described memories.

[0145] Processor 402 is used to invoke a computer program stored in memory 401 to execute as implemented. Figure 1 The method of the embodiment shown.

[0146] This application also provides a computer-readable storage medium storing computer-executable instructions required to execute the processor, including a program required to execute the processor.

[0147] In some possible implementations, various aspects of the shift control method for a hybrid vehicle provided in this application can also be implemented as a program product, including program code. When the program product is run on a terminal device, the program code causes the terminal device to execute the steps in the shift control method for a hybrid vehicle according to the various exemplary embodiments of this application described above. For example, an electronic device can perform the implementation as described above. Figure 2 The example shown.

[0148] The program product may employ any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: electrical connections having one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0149] The shift control program product for a hybrid vehicle according to embodiments of this application can employ a portable compact disc read-only memory (CD-ROM) and include program code, and can run on a computing device. However, the program product of this application is not limited thereto. In this document, the readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0150] A readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying readable program code. This propagated data signal may take many forms, including—but not limited to—electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium, capable of sending, propagating, or transmitting a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0151] The program code contained on the readable medium may be transmitted using any suitable medium, including—but not limited to—wireless, wired, optical fiber, RF, or any suitable combination thereof.

[0152] Program code for performing the operations of this application can be written in any combination of one or more programming languages, including entity-oriented programming languages ​​such as Java and C++, and conventional procedural programming languages ​​such as C or similar languages. The program code can execute entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving remote computing devices, the remote computing device can be connected to the user's computing device via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0153] It should be noted that although several units or sub-units of the device have been mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of this application, the features and functions of two or more units described above can be embodied in one unit. Conversely, the features and functions of one unit described above can be further divided and embodied by multiple units.

[0154] Furthermore, although the operations of the method of this application are described in a specific order in the accompanying drawings, this does not require or imply that these operations must be performed in that specific order, or that all the operations shown must be performed to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

[0155] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0156] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable file processing device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable file processing device, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0157] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable document processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0158] These computer program instructions can also be loaded onto a computer or other programmable document processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable device for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0159] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0160] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A shift control method for a hybrid vehicle, characterized in that, The method includes: If the vehicle is detected to be in the process of shifting gears and the engine is experiencing smoke limitation, the target calibration time corresponding to the current gearbox gear is determined according to the preset correspondence between gear and calibration time; the calibration time represents the time required to increase the engine torque from the smoke point torque value to the upper limit torque value. Based on the current target smoke point torque value of the engine and the target torque upper limit value corresponding to the current engine speed, determine the first vehicle required torque value at at least one target moment within the target calibration period; For any target time, after the target time is reached, the output torque value of the motor is adjusted according to the first vehicle required torque value at the target time, so that the sum of the output torque value of the motor and the output torque value of the engine at the target time is less than or equal to the first vehicle required torque value at the target time.

2. The method according to claim 1, characterized in that, After determining the target calibration duration corresponding to the current gear position, and before determining the first vehicle required torque value at at least one target moment within the target calibration duration, the method further includes: The current torque value of the engine is used as the current target smoke point torque value of the engine; and Based on the preset mapping relationship between engine speed and torque upper limit, the target torque upper limit corresponding to the current engine speed is determined.

3. The method according to claim 1, characterized in that, Based on the current target smoke point torque value of the engine and the upper limit of the target torque corresponding to the current engine speed, determine the first vehicle required torque value at at least one target moment within the target calibration period, including: Based on the target calibration time, the target smoke point torque value, and the target torque upper limit value, establish a correspondence between time and torque value; For any target time, the torque value corresponding to the target time is determined based on the correspondence, and the determined torque value is used as the first vehicle required torque value corresponding to the target time, wherein adjacent target times are separated by a set interval.

4. The method according to any one of claims 1 to 3, characterized in that, For any given target time, after the target time is reached, adjusting the motor's output torque value based on the first vehicle torque requirement value at the target time further includes: After the target calibration period, the output torque value of the motor is periodically adjusted based on the second vehicle torque demand value, so that the sum of the adjusted output torque value of the motor and the output torque value of the engine at the adjustment time is less than or equal to the second vehicle torque demand value; wherein the second vehicle torque demand value is the target torque upper limit value.

5. The method according to claim 4, characterized in that, The method further includes: After the target calibration time, it is periodically determined whether the difference between the engine's output torque value and the target torque upper limit value is less than or equal to a preset threshold. If the result of the judgment is yes, then stop adjusting the output torque value of the motor based on the second vehicle demand torque value periodically, and control the motor to stop outputting torque value.

6. A shift control device for a hybrid vehicle, characterized in that, The device includes: The target duration determination unit is used to determine the target calibration duration corresponding to the current gearbox gear based on the preset correspondence between gear and calibration duration if the vehicle is detected to be in the process of shifting gears and the engine smoke limit is detected; the calibration duration represents the time it takes to increase the engine torque from the smoke point torque value to the upper limit torque value. The required torque determination unit is used to determine the first vehicle required torque value at at least one target moment within the target calibration period based on the current target smoke point torque value of the engine and the target torque upper limit value corresponding to the current engine speed. The torque coordination control unit is used to adjust the output torque value of the motor according to the first vehicle demand torque value at the target time after the target time is reached, so that the sum of the output torque value of the motor and the output torque value of the engine at the target time is less than or equal to the first vehicle demand torque value at the target time.

7. The apparatus according to claim 6, characterized in that, The required torque determination unit is also used for: The current torque value of the engine is taken as the current target smoke point torque value of the engine; as well as Based on the preset mapping relationship between engine speed and torque upper limit, the target torque upper limit corresponding to the current engine speed is determined.

8. The apparatus according to claim 6, characterized in that, The required torque determination unit is specifically used for: Based on the target calibration time, the target smoke point torque value, and the target torque upper limit value, establish a correspondence between time and torque value; For any target time, the torque value corresponding to the target time is determined based on the correspondence, and the determined torque value is used as the first vehicle required torque value corresponding to the target time, wherein adjacent target times are separated by a set interval.

9. An electronic device, characterized in that, It includes a processor and a memory, wherein the memory stores program code that, when executed by the processor, causes the processor to perform the steps of the method according to any one of claims 1 to 5.

10. A computer-readable storage medium storing a computer program therein, characterized in that: When the computer program is executed by a processor, it implements the method according to any one of claims 1 to 5.

Images