Vehicle drive control methods, devices, storage media and vehicles

Abstract

This invention discloses a vehicle drive control method, device, storage medium, and vehicle, relating to the field of vehicle control technology. The method includes: acquiring driving state data of a target vehicle, wherein the target vehicle employs a hybrid drive architecture with two motors connected in series; using the driving state data, determining the target vehicle's driving mode, accelerator pedal opening, and engine power demand; determining a target operating strategy from multiple operating strategies based on the driving mode, accelerator pedal opening, and engine power demand, wherein the multiple operating strategies are determined by engine characteristic data, which at least characterizes the vehicle's economic characteristics and maximum torque characteristics; and performing drive control on the engine according to the target operating strategy. This invention solves the technical problem in related technologies where it is difficult to simultaneously achieve economy, power, and vehicle driving comfort in dual-motor drive torque distribution control schemes.

Description

Technical Field

[0001] This invention relates to the field of vehicle control technology, and more specifically, to a vehicle drive control method, device, storage medium, and vehicle. Background Technology

[0002] Currently, there are two main problems with torque distribution control in dual-motor series drive systems: First, based on overall vehicle economy considerations, control is performed along the optimal economic line according to the engine's power demand. However, this approach leads to excessively high engine speeds under high power demand conditions, thus affecting the vehicle's noise, vibration, and harshness (NVH) performance. Second, at high engine operating speeds, the engine speed adjustment range is large and the clutch speed adjustment process is slow during the transition from series to parallel operation of the dual motors. In other words, in the relevant technical field, how to achieve torque distribution control in a dual-motor series drive mode while balancing vehicle economy, power, and NVH performance has become a crucial technical challenge.

[0003] There is currently no effective solution to the above problems. Summary of the Invention

[0004] This invention provides a vehicle drive control method, device, storage medium, and vehicle to at least solve the technical problem of difficulty in balancing economy, power, and vehicle driving comfort in the dual-motor drive torque distribution control schemes provided in the related art.

[0005] According to one aspect of the present invention, a vehicle drive control method is provided, comprising: acquiring driving state data of a target vehicle, wherein the target vehicle adopts a hybrid drive architecture with dual motors in series; using the driving state data to determine the driving mode, accelerator pedal opening, and engine power demand of the target vehicle; determining a target operating strategy from multiple operating strategies based on the driving mode, accelerator pedal opening, and engine power demand, wherein the multiple operating strategies are determined by engine characteristic data, the characteristic data being used to characterize at least the economical operating characteristics and the maximum torque characteristics; and performing drive control on the engine according to the target operating strategy.

[0006] Optionally, using driving status data to determine the driving mode includes: analyzing the driving status data to determine the driving mode as one of the following: economy mode, pure electric mode, or sport mode.

[0007] Optionally, determining the engine power requirement using driving status data includes: determining the required drive power of the target vehicle's drive motor based on the driving status data; and calculating the engine power requirement using the target conversion rule and the required drive power, wherein the target conversion rule is determined by the hybrid drive architecture with dual motors in series.

[0008] Optionally, the vehicle drive control method further includes: acquiring characteristic data, wherein the characteristic data includes an economic operating condition range and maximum torque data, the economic operating condition range being used to determine the range of engine operating conditions that meet preset economic conditions, and the maximum torque data being used to determine the maximum torque value corresponding to the engine at different speeds; constructing a first operating strategy based on the economic operating condition range, wherein the first operating strategy is used to restrict the engine to operate within the economic operating condition range; constructing a second operating strategy based on a preset speed threshold corresponding to the engine, the economic operating condition range, and the maximum torque data; and constructing a third operating strategy based on the maximum torque data, wherein the third operating strategy is used to restrict the engine to operate at the maximum torque value.

[0009] Optionally, constructing a second operating strategy based on the engine's corresponding preset speed threshold, economic operating condition range, and maximum torque data includes: constructing a first part of the second operating strategy within a first speed range based on the economic operating condition range, wherein the first speed range is a speed range less than the preset speed threshold, and the first part of the strategy is used to restrict the engine to operate within the economic operating condition range; and constructing a second part of the second operating strategy within a second speed range based on the maximum torque data, wherein the second speed range is a speed range greater than or equal to the preset speed threshold, and the second part of the strategy is used to restrict the engine to operate at the maximum torque value corresponding to the real-time speed.

[0010] Optionally, the target operating strategy is determined from multiple operating strategies based on the driving mode, accelerator pedal opening, and engine power demand, including: determining a first operating strategy as the target operating strategy in response to the current driving mode being in economy mode; determining a second operating strategy as the target operating strategy in response to the driving mode not being in economy mode; and determining a third operating strategy as the target operating strategy in response to the accelerator pedal opening being greater than a preset opening threshold.

[0011] Optionally, driving the engine according to the target operating strategy includes: generating isopower lines corresponding to the engine's required power in the target coordinate system, and generating operating condition lines of the target operating strategy, wherein the target coordinate system is constructed based on the engine's speed and torque; determining the target operating condition based on the isopower lines and operating condition lines; and controlling the engine to output torque according to the target operating condition.

[0012] According to another aspect of the present invention, a vehicle drive control device is also provided, comprising: an acquisition module for acquiring driving state data of a target vehicle, wherein the target vehicle adopts a hybrid drive architecture with dual motors in series; a first determination module for determining the driving mode, accelerator pedal opening, and engine power demand of the target vehicle using the driving state data; a second determination module for determining a target operating strategy from multiple operating strategies based on the driving mode, accelerator pedal opening, and engine power demand, wherein the multiple operating strategies are determined by engine characteristic data, and the characteristic data is used to characterize at least the operating economy characteristics and maximum torque characteristics; and a control module for driving control of the engine according to the target operating strategy.

[0013] According to another aspect of the present invention, a storage medium is also provided, the storage medium including a stored program, wherein, when the program is running, the device where the storage medium is located executes the vehicle drive control method of any one of the above.

[0014] According to another aspect of the present invention, a vehicle is also provided, including an on-board memory and an on-board processor, wherein the on-board memory stores a computer program, and the on-board processor is configured to run the computer program to execute the vehicle drive control method described above.

[0015] In this embodiment of the invention, driving state data of the target vehicle is acquired, wherein the target vehicle adopts a hybrid drive architecture with dual motors connected in series. Using the driving state data, the driving mode, accelerator pedal opening, and engine power demand of the target vehicle are determined. Based on the driving mode, accelerator pedal opening, and engine power demand, a target operating strategy is determined from multiple operating strategies, wherein the multiple operating strategies are determined by engine characteristic data, which at least characterizes the economic characteristics and maximum torque characteristics. The engine is then driven and controlled according to the target operating strategy. Thus, this embodiment of the invention achieves the objective of determining the vehicle engine's operating strategy by considering the driving mode, accelerator pedal opening, and engine power demand. Furthermore, because the above operating strategy takes into account the engine's economic characteristics and maximum torque characteristics, this embodiment of the invention can achieve the technical effect of balancing economic efficiency and power performance in engine operation control, reducing vehicle NVH levels, and improving vehicle driving comfort. This solves the technical problem of difficulty in balancing economic efficiency, power performance, and vehicle driving comfort in the dual-motor drive torque distribution control schemes provided in related technologies. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 This is a hardware structure block diagram of an optional vehicle terminal for a vehicle drive control method according to an embodiment of the present invention.

[0018] Figure 2 This is a flowchart of a vehicle drive control method according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the coordinate representation of an optional engine characteristic data according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the coordinate representation of an optional multiple operating strategies according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of an optional target operation strategy selection process according to an embodiment of the present invention;

[0022] Figure 6 This is a structural block diagram of a vehicle drive control device according to an embodiment of the present invention. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. 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 should fall within the scope of protection of the present invention.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention 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 the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0025] According to an embodiment of the present invention, an embodiment of a vehicle drive control method is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, steps shown or described may be executed in a different order than that shown here.

[0026] Figure 1 This is a hardware structure block diagram of an optional vehicle terminal for a vehicle drive control method according to an embodiment of the present invention, such as... Figure 1 As shown, a vehicle terminal (or a mobile device that communicates with a vehicle) may include one or more processors 102 (processor 102 may include, but is not limited to, a microprocessor (MCU) or a field-programmable gate array (FPGA) processing device), a memory 104 for storing data, and a transmission device 106 for communication functions. In addition, it may also include: a display device 110, an input / output device 108 (i.e., an I / O device), a Universal Serial Bus (USB) port (which may be included as one of the ports of a computer bus, not shown in the figure), a network interface (not shown in the figure), a power supply (not shown in the figure), and / or a camera (not shown in the figure). Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the vehicle terminal described above. For example, the vehicle terminal may also include components that are more... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0027] It should be noted that the aforementioned one or more processors 102 and / or other data processing circuits may be embodied, in whole or in part, as software, hardware, firmware, or any other combination thereof. Furthermore, the data processing circuitry may be a single, independent processing module, or may be integrated, in whole or in part, into any other component within the vehicle terminal (or mobile device).

[0028] The memory 104 can be used to store software programs and modules of application software, such as the program instructions / data storage device corresponding to the vehicle drive control method in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the software programs and modules stored in the memory 104, thereby realizing the aforementioned vehicle drive control method. The memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the vehicle terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0029] The transmission device 106 is used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by the vehicle terminal's communication provider. In one example, the transmission device 106 includes a Network Interface Controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the transmission device 106 may be a Radio Frequency (RF) module, used for wireless communication with the Internet.

[0030] Under the above operating environment, the embodiments of the present invention provide as follows: Figure 2 The vehicle drive control method shown is as follows: Figure 2 This is a flowchart of a vehicle drive control method according to an embodiment of the present invention, such as... Figure 2 As shown, the method includes the following implementation steps:

[0031] Step S201: Obtain the driving status data of the target vehicle, wherein the target vehicle adopts a hybrid drive architecture with dual motors in series.

[0032] Step S202: Using driving status data, determine the target vehicle's driving mode, accelerator pedal opening, and engine power demand.

[0033] Step S203: Based on the driving mode, accelerator pedal opening and engine power demand, determine the target operating strategy from multiple operating strategies. The multiple operating strategies are determined by the engine characteristic data, which is used to characterize at least the operating economy characteristics and maximum torque characteristics.

[0034] Step S204: Drive the engine according to the target operating strategy.

[0035] The aforementioned driving status data includes the target vehicle's driving mode signal, accelerator pedal sensor signal, speed data, and acceleration data. The driving mode can be determined based on the driving mode signal. The accelerator pedal sensor signal can determine the accelerator pedal opening. The engine's required power is determined based on the aforementioned driving mode, speed data, and acceleration data. Furthermore, the aforementioned driving status data may also include environmental data and load data of the target vehicle during operation. Combining these with the aforementioned driving mode, speed data, acceleration data, environmental data, and load data, the engine's required power is determined.

[0036] In this embodiment of the invention, the engine's economic operating characteristics and maximum torque characteristics are considered, and multiple candidate operating strategies for the engine are constructed. During the operation of the target vehicle, the target operating strategy of the engine is determined based on the driving mode, accelerator pedal opening and engine power demand.

[0037] This invention proposes a dual-motor series drive torque distribution control scheme, which adjusts the operating conditions of the engine series working line according to different driving modes, thereby taking into account the vehicle's economy, power and NVH performance during the dual-motor series drive torque distribution control process.

[0038] In this embodiment of the invention, driving state data of the target vehicle is acquired, wherein the target vehicle adopts a hybrid drive architecture with dual motors connected in series. Using the driving state data, the driving mode, accelerator pedal opening, and engine power demand of the target vehicle are determined. Based on the driving mode, accelerator pedal opening, and engine power demand, a target operating strategy is determined from multiple operating strategies, wherein the multiple operating strategies are determined by engine characteristic data, which at least characterizes the economic characteristics and maximum torque characteristics. The engine is then driven and controlled according to the target operating strategy. Thus, this embodiment of the invention achieves the objective of determining the vehicle engine's operating strategy by considering the driving mode, accelerator pedal opening, and engine power demand. Furthermore, because the above operating strategy takes into account the engine's economic characteristics and maximum torque characteristics, this embodiment of the invention can achieve the technical effect of balancing economic efficiency and power performance in engine operation control, reducing vehicle NVH levels, and improving vehicle driving comfort. This solves the technical problem of difficulty in balancing economic efficiency, power performance, and vehicle driving comfort in the dual-motor drive torque distribution control schemes provided in related technologies.

[0039] The methods described in the embodiments of the present invention will be further described below.

[0040] Optionally, in step S202 above, determining the driving mode using driving status data may further include the following execution steps:

[0041] Step S221: Analyze the driving status data and determine the driving mode as one of the following: Eco mode, Pure electric mode, or Sport mode.

[0042] The aforementioned economy mode aims to maximize the fuel efficiency of the target vehicle. When the target vehicle is in this economy mode, the output of the engine and electric motor will typically be automatically adjusted to reduce energy consumption and extend driving range. Furthermore, the economy mode may limit acceleration performance to avoid excessive energy consumption.

[0043] In the pure electric mode described above, the target vehicle is driven entirely by an electric motor, without using a combustion engine. Pure electric mode is typically suitable for short-distance urban driving or environments requiring zero emissions, reducing exhaust emissions and noise pollution. However, in pure electric mode, the vehicle's driving range is limited, and the frequency of charging increases.

[0044] The aforementioned Sport mode can be considered a high-performance driving mode for hybrid vehicles, designed to provide stronger acceleration and power output. In Sport mode, the vehicle offers quicker acceleration response and higher power output, but may sacrifice fuel efficiency. Sport mode can be used when acceleration or strong power is needed, such as for overtaking or driving on mountain roads.

[0045] Based on the above execution steps, the current driving mode of the target vehicle is determined according to the real-time driving status data of the target vehicle, serving as the basis for subsequently selecting an operating strategy for the engine. Therefore, this embodiment of the invention can improve the accuracy and appropriateness of selecting an operating strategy for the engine.

[0046] Optionally, in step S202 above, determining the engine power demand using driving status data may further include the following steps:

[0047] Step S222: Determine the required drive power of the target vehicle's drive motor based on the driving status data;

[0048] Step S223: Calculate the engine power demand using the target conversion rule and the demand drive power, wherein the target conversion rule is determined by the hybrid drive architecture with dual motors in series.

[0049] In the application scenario, a target conversion rule is pre-defined based on the dual-motor series hybrid drive architecture corresponding to the target vehicle. This target conversion rule is used to determine the conversion relationship between the required drive power of the drive motor and the required power of the engine.

[0050] In the aforementioned dual-motor series-connected hybrid drive architecture, the target vehicle's engine consumes fuel to output mechanical power, which drives a generator to generate electricity. The electrical energy output by the generator then powers the drive motor, which provides the driving power to the target vehicle.

[0051] Through the above execution steps, the engine power requirement can be determined based on the real-time driving status data of the target vehicle, and then used as the basis for selecting an operating strategy for the engine. Therefore, this embodiment of the invention can improve the accuracy and suitability of selecting an operating strategy for the engine.

[0052] Optionally, the above vehicle drive control method may further include the following steps:

[0053] Step S251: Obtain characteristic data, wherein the characteristic data includes the economic operating condition range and the maximum torque data. The economic operating condition range is used to determine the range of engine operating conditions that meet the preset economic conditions, and the maximum torque data is used to determine the maximum torque value of the engine at different speeds.

[0054] Step S252: Based on the economic operating condition range, construct a first operating strategy, wherein the first operating strategy is used to limit the engine to operate within the economic operating condition range;

[0055] Step S253: Construct a second operating strategy based on the engine's preset speed threshold, economic operating condition range, and maximum torque data;

[0056] Step S254: Based on the maximum torque data, construct a third operating strategy, wherein the third operating strategy is used to restrict the engine to operate at the maximum torque value.

[0057] The aforementioned engine characteristic data can be determined during the engine's production and design process. The engine's economic operating range can be defined as the range of operating conditions within a specific speed range where the engine can operate with maximum efficiency. Within this range, the engine can operate with the lowest fuel consumption and highest power output, thus achieving more economical and efficient operation. The economic operating range is usually clearly indicated in the engine's technical parameters, allowing users to optimize engine operation based on this data to achieve optimal economic performance.

[0058] Maximum torque data refers to the maximum torque that an engine can output at a specific speed. Engine maximum torque data characterizes the engine's output capability at different speeds, allowing for the selection of the most suitable speed range in practical use to obtain optimal power output and driving performance.

[0059] In one application scenario, the acquired engine characteristic data can be represented in a target coordinate system. The horizontal axis of this target coordinate system can represent engine speed (in r / min), and the vertical axis can represent engine torque (in N·m). For example... Figure 3 As shown, the maximum torque data is represented as the maximum torque line in the target coordinate system, and the economic operating condition range is represented as a closed region in the target coordinate system. The boundary of this closed region is as follows: Figure 3 The closed dashed curve shown.

[0060] The first, second, and third operating strategies described above can also be represented by operating lines in the target coordinate system. In one application scenario, such as... Figure 4 As shown, the first running strategy is represented as running line 1 in the target coordinate system, the second running strategy is represented as running line 2 in the target coordinate system, and the third running strategy is represented as running line 3 in the target coordinate system.

[0061] Specifically, such as Figure 4 As shown, operating line 1 represents the engine operating entirely within its economic operating range, where the engine primarily operates to meet the vehicle's economic needs while the target vehicle is in motion. Operating line 2 represents an engine operating strategy that comprehensively considers the economic operating range and maximum torque data, and is constructed based on preset speed thresholds, aiming to simultaneously satisfy the vehicle's economy and power performance. Operating line 3 represents a strategy implemented under preset conditions to enable the target vehicle to quickly obtain engine power response. According to operating line 3, the engine operates along the maximum torque line, and the engine primarily operates to meet the vehicle's power needs while the target vehicle is in motion.

[0062] According to the above execution steps of the present invention, considering the engine's operating economy characteristics and maximum torque characteristics, a first operating strategy, a second operating strategy, and a third operating strategy are pre-constructed for selection. That is, the target operating strategy is selected for the engine in real time during the operation of the target vehicle. Thus, the present invention can take into account both the vehicle's economy and power performance.

[0063] Optionally, in step S253 above, constructing a second operating strategy based on the engine's preset speed threshold, economic operating condition range, and maximum torque data may further include the following execution steps:

[0064] Step S2531: Within the first speed range, construct the first part of the second operating strategy based on the economic operating condition range, wherein the first speed range is the speed range less than the preset speed threshold, and the first part of the strategy is used to limit the engine to operate within the economic operating condition range.

[0065] Step S2532: Within the second speed range, construct the second part of the second operating strategy based on the maximum torque data. The second speed range is a speed range that is greater than or equal to a preset speed threshold. The second part of the strategy is used to restrict the engine to operate at the maximum torque value corresponding to the real-time speed.

[0066] When constructing the second operating strategy, in order to comprehensively consider the economic operating condition range and the maximum torque data, the operating strategy is constructed in a targeted manner within the first speed range and the second speed range determined by the preset speed threshold.

[0067] Still as Figure 4 As shown, in the first speed range where the engine speed is less than a preset speed threshold (denoted as n0), the constructed running line 2 coincides with (or is close to) the corresponding part of running line 1. In the second speed range where the engine speed is greater than the preset speed threshold, the constructed running line 2 gradually transitions to coincide with (or is close to) the corresponding part of running line 3.

[0068] It should be noted that in the second operating strategy (i.e., corresponding to operating line 2) described above: when the engine speed is low, the engine can be controlled to run along operating line 1; when the engine speed is high, the engine can be controlled to run along operating line 3. Therefore, according to the second operating strategy described above, this embodiment of the invention can reduce the engine speed while maintaining the same engine power requirement, thereby simultaneously satisfying the vehicle's economy and power performance. Furthermore, it can also reduce the vehicle's NVH level and enhance driving comfort.

[0069] In an exemplary application scenario, the first, second, and third operating strategies described above can be constructed by setting an engine operating condition table.

[0070] For example, for each operating strategy, based on the power demand of multiple engines (e.g., ), the engine speed and engine torque corresponding to the power demand of each engine are set.

[0071] The first operating strategy is defined using the engine operating condition table shown in Table 1 below.

[0072] Table 1

[0073] Engine power requirement (kW) Engine speed (r / min) Engine torque (N·m) <![CDATA[P1]]> <![CDATA[N 11 ]]> <![CDATA[T 11 ]]> <![CDATA[P2]]> <![CDATA[N 12 ]]> <![CDATA[T 12 ]]> <![CDATA[P3]]> <![CDATA[N 13 ]]> <![CDATA[T 13 ]]> <![CDATA[P4]]> <![CDATA[N 14 ]]> <![CDATA[T 14 ]]> <![CDATA[P5]]> <![CDATA[N 15 ]]> <![CDATA[T 15 ]]> …… …… ……

[0074] The second operating strategy is defined using the engine operating condition table shown in Table 2 below.

[0075] Table 2

[0076] Engine power requirement (kW) Engine speed (r / min) Engine torque (N·m) <![CDATA[P1]]> <![CDATA[N 21 ]]> <![CDATA[T 21 ]]> <![CDATA[P2]]> <![CDATA[N 22 ]]> <![CDATA[T 22 ]]> <![CDATA[P3]]> <![CDATA[N 23 ]]> <![CDATA[T 23 ]]> <![CDATA[P4]]> <![CDATA[N 24 ]]> <![CDATA[T 24 ]]> <![CDATA[P5]]> <![CDATA[N 25 ]]> <![CDATA[T 25 ]]> …… …… ……

[0077] The third operating strategy is defined using the engine operating condition table shown in Table 3 below.

[0078] Table 3

[0079] Engine power requirement (kW) Engine speed (r / min) Engine torque (N·m) <![CDATA[P1]]> <![CDATA[N 31 ]]> <![CDATA[T 31 ]]> <![CDATA[P2]]> <![CDATA[N 32 ]]> <![CDATA[T 32 ]]> <![CDATA[P3]]> <![CDATA[N 33 ]]> <![CDATA[T 33 ]]> <![CDATA[P4]]> <![CDATA[N 34 ]]> <![CDATA[T 34 ]]> <![CDATA[P5]]> <![CDATA[N 35 ]]> <![CDATA[T 35 ]]> …… …… ……

[0080] In practical application scenarios, based on the characteristic data of specific engine models and combined with the vehicle characteristics of the target vehicle, the engine speed and engine torque values ​​corresponding to the first, second, and third operating strategies are set to the specific values ​​shown in Table 4.

[0081] Table 4

[0082]

[0083] According to the above execution steps provided in the embodiments of the present invention, a variety of candidate operating strategies are preset for selection, and the engine is controlled to operate according to the selected operating strategy, which can take into account both economy and power performance, while reducing the vehicle's NVH level and enhancing the vehicle's driving comfort.

[0084] Optionally, step S203 above, determining the target operating strategy from multiple operating strategies based on the driving mode, accelerator pedal opening, and engine power demand, may further include the following execution steps:

[0085] Step S231: In response to the fact that the driving mode is currently in economy mode, the first operating strategy is determined as the target operating strategy;

[0086] Step S232: In response to the fact that the driving mode is not in the economy mode, the second operating strategy is determined as the target operating strategy;

[0087] Step S233: In response to the accelerator pedal opening being greater than a preset opening threshold, the third operating strategy is determined as the target operating strategy.

[0088] Based on the above execution steps, in the application scenario, as follows: Figure 5 The target operation strategy selection process shown is for selecting the target operation strategy for the target vehicle's engine. Specifically, as follows... Figure 5 As shown, it determines whether the target vehicle's driving mode is Eco mode. If the driving mode is Eco mode, the first operating strategy is determined as the target operating strategy; if the driving mode is not Eco mode, the second operating strategy is determined as the target operating strategy. Furthermore, the accelerator pedal opening of the target vehicle is continuously monitored. When the accelerator pedal opening is determined to be greater than a preset opening threshold (e.g., 80%, 100%), the third operating strategy is determined as the target operating strategy.

[0089] Based on this, in the dual-motor hybrid system corresponding to the target vehicle, when the engine is running in series drive mode, the dual-motor hybrid system first receives the target vehicle's driving mode, accelerator pedal opening, and engine power demand. Then, it calculates the target operating speed and target operating torque of the engine through a torque distribution control program for the dual-motor series drive, ultimately outputting the engine's target operating speed and target operating torque. This torque distribution control program can be used to select a target operating strategy for the engine based on the execution steps provided in the embodiments of the present invention, and calculate the target operating condition to be executed by the engine based on the target operating strategy. This target operating condition can be characterized by the target operating speed and target operating torque.

[0090] In economy mode, when the target vehicle is operating at a low to medium throttle pedal opening, the target operating speed and target operating torque of the engine are obtained through interpolation calculation based on the engine's required power and the corresponding first operating strategy (e.g., Table 1), so that the engine operates along the path shown in Table 1. Figure 4 The vehicle runs along line 1 (also known as the economy line) as shown. However, in other driving modes, the engine will run along... Figure 4 The engine operates along running line 2 as shown, obtaining the target engine speed and target torque through interpolation of the second operating strategy (e.g., Table 2). Specifically, when the target vehicle's accelerator pedal opening is 100%, to quickly respond to the driver's power demands, the engine is controlled along running line 2. Figure 4 The engine operates on running line 3 (also known as the maximum torque line), and the target operating speed and target operating torque are obtained by interpolation of the third operating strategy (e.g., Table 3).

[0091] Optionally, step S204 above, which involves driving the engine according to the target operating strategy, may further include the following execution steps:

[0092] Step S241: In the target coordinate system, generate the isopower line corresponding to the engine's required power and the operating condition line of the target operating strategy, wherein the target coordinate system is constructed based on the engine's speed and torque.

[0093] Step S242: Determine the target operating condition based on the equal power line and the operating condition line;

[0094] Step S243: Control the engine to output torque according to the target operating conditions.

[0095] In application scenarios, the target operating condition of the engine can also be determined based on the isopower lines in the target coordinate system and the operating condition lines corresponding to the target operating strategy (such as operating line 1, operating line 2, or operating line 3 mentioned above). Based on the target operating speed and target operating torque corresponding to the target operating condition, the engine is controlled to output torque.

[0096] Through the above-described methods and steps, the embodiments of the present invention can achieve the goal of determining the vehicle engine's operating strategy by considering the driving mode, accelerator pedal opening, and engine power demand. Furthermore, since the above-described operating strategy takes into account the engine's economic characteristics and maximum torque characteristics, the embodiments of the present invention can achieve the technical effects of balancing economy and power in engine operation control, reducing vehicle NVH levels, and improving vehicle driving comfort. This solves the technical problem of difficulty in balancing economy, power, and vehicle driving comfort in the dual-motor drive torque distribution control schemes provided in related technologies.

[0097] In this embodiment, a vehicle drive control device is also provided, which is used to implement the above embodiments and preferred embodiments, and will not be repeated as already described. As used below, a "module" is a combination of software and / or hardware that can perform a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0098] Figure 6 This is a structural block diagram of a vehicle drive control device according to an embodiment of the present invention, such as... Figure 6 As shown, the device includes:

[0099] The acquisition module 601 is used to acquire the driving status data of the target vehicle, wherein the target vehicle adopts a hybrid drive architecture with dual motors in series.

[0100] The first determining module 602 is used to determine the driving mode, accelerator pedal opening and engine power demand of the target vehicle using driving status data.

[0101] The second determining module 603 is used to determine a target operating strategy from multiple operating strategies based on the driving mode, accelerator pedal opening and engine power demand. The multiple operating strategies are determined by engine characteristic data, which at least characterizes the operating economy characteristics and maximum torque characteristics.

[0102] The control module 604 is used to drive the engine according to the target operating strategy.

[0103] Optionally, the first determining module 602 is further configured to: analyze the driving status data and determine the driving mode as one of the following: economy mode, pure electric mode, or sport mode.

[0104] Optionally, the first determining module 602 is further configured to: determine the required drive power of the drive motor of the target vehicle based on the driving status data; and calculate the required engine power using the target conversion rule and the required drive power, wherein the target conversion rule is determined by the hybrid drive architecture of the dual motors in series.

[0105] Optionally, the vehicle drive control device includes, in addition to all the modules mentioned above, a construction module 605 (not shown in the figure), used for: acquiring characteristic data, wherein the characteristic data includes an economic operating condition range and maximum torque data, the economic operating condition range being used to determine the range of engine operating conditions that meet preset economic conditions, and the maximum torque data being used to determine the maximum torque value corresponding to the engine at different speeds; constructing a first operating strategy based on the economic operating condition range, wherein the first operating strategy is used to restrict the engine to operate within the economic operating condition range; constructing a second operating strategy based on the preset speed threshold corresponding to the engine, the economic operating condition range, and the maximum torque data; and constructing a third operating strategy based on the maximum torque data, wherein the third operating strategy is used to restrict the engine to operate at the maximum torque value.

[0106] Optionally, the aforementioned construction module 605 is further configured to: construct a first part of the second operating strategy within a first speed range based on the economic operating condition range, wherein the first speed range is a speed range less than a preset speed threshold, and the first part of the strategy is used to restrict the engine to operate within the economic operating condition range; and construct a second part of the second operating strategy within a second speed range based on the maximum torque data, wherein the second speed range is a speed range greater than or equal to the preset speed threshold, and the second part of the strategy is used to restrict the engine to operate according to the maximum torque value corresponding to the real-time speed.

[0107] Optionally, the second determining module 603 is further configured to: determine the first operating strategy as the target operating strategy in response to the current driving mode being in the economy mode; determine the second operating strategy as the target operating strategy in response to the driving mode not being in the economy mode; and determine the third operating strategy as the target operating strategy in response to the accelerator pedal opening being greater than a preset opening threshold.

[0108] Optionally, the control module 604 is further configured to: generate isopower lines corresponding to the engine's required power in the target coordinate system, and generate operating condition lines for the target operating strategy, wherein the target coordinate system is constructed based on the engine's speed and torque; determine the target operating condition based on the isopower lines and operating condition lines; and control the engine to output torque according to the target operating condition.

[0109] It should be noted that the above modules can be implemented by software or hardware. For the latter, they can be implemented in the following ways, but are not limited to: all the above modules are located in the same processor; or, the above modules are located in different processors in any combination.

[0110] According to another aspect of the present invention, a computer-readable storage medium is also provided, the storage medium including a stored program, wherein, when the program is executed, the device where the storage medium is located executes any of the aforementioned vehicle drive control methods.

[0111] Optionally, in this embodiment, the storage medium may be configured to store a computer program for performing the following steps: acquiring driving state data of the target vehicle, wherein the target vehicle adopts a hybrid drive architecture with dual motors in series; using the driving state data, determining the driving mode, accelerator pedal opening, and engine power demand of the target vehicle; determining a target operating strategy from multiple operating strategies based on the driving mode, accelerator pedal opening, and engine power demand, wherein the multiple operating strategies are determined by engine characteristic data, and the characteristic data is used to characterize at least the operating economy characteristics and maximum torque characteristics; and performing drive control of the engine according to the target operating strategy.

[0112] Optionally, in this embodiment, the storage medium may include, but is not limited to, various media capable of storing computer programs, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0113] According to another aspect of the present invention, a vehicle is also provided, including an on-board memory and an on-board processor, wherein the on-board memory stores a computer program and the on-board processor is configured to run the computer program to execute the vehicle drive control method of any of the foregoing embodiments.

[0114] Optionally, in this embodiment, the on-board processor can be configured to perform the following steps via a computer program: acquiring driving status data of the target vehicle, wherein the target vehicle adopts a hybrid drive architecture with dual motors in series; using the driving status data, determining the driving mode, accelerator pedal opening, and engine power demand of the target vehicle; determining a target operating strategy from multiple operating strategies based on the driving mode, accelerator pedal opening, and engine power demand, wherein the multiple operating strategies are determined by engine characteristic data, and the characteristic data is at least used to characterize the operating economy characteristics and maximum torque characteristics; and performing drive control on the engine according to the target operating strategy.

[0115] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments and their optional implementations, and will not be repeated here.

[0116] The sequence numbers of the above embodiments of the present invention are for description only and do not represent the superiority or inferiority of the embodiments.

[0117] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0118] In the several embodiments provided by this invention, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection can be through some interfaces; the indirect coupling or communication connection of units or modules can be electrical or other forms.

[0119] 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 units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0120] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0121] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, ROM, RAM, portable hard drives, magnetic disks, or optical disks.

[0122] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A vehicle drive control method, characterized in that, include: Acquire driving status data of the target vehicle, wherein the target vehicle adopts a hybrid drive architecture with dual motors in series; Using the driving status data, the driving mode, accelerator pedal opening, and engine power demand of the target vehicle are determined; Based on the driving mode, the accelerator pedal opening, and the engine power demand, a target operating strategy is determined from multiple operating strategies, wherein the multiple operating strategies are determined by the engine characteristic data, which at least characterizes the operating economy characteristics and maximum torque characteristics, and the multiple operating strategies include: a first operating strategy, a second operating strategy, and a third operating strategy; Drive the engine according to the target operating strategy; The method further includes: acquiring the characteristic data, wherein the characteristic data includes an economic operating condition range and maximum torque data, the economic operating condition range being used to determine the range of engine operating conditions that meet preset economic conditions, and the maximum torque data being used to determine the maximum torque value corresponding to the engine at different speeds; constructing a first operating strategy based on the economic operating condition range, wherein the first operating strategy is used to restrict the engine to operate within the economic operating condition range; constructing a second operating strategy according to a preset speed threshold corresponding to the engine, the economic operating condition range, and the maximum torque data; and constructing a third operating strategy based on the maximum torque data, wherein the third operating strategy is used to restrict the engine to operate at the maximum torque value.

2. The vehicle drive control method according to claim 1, characterized in that, Determining the driving mode using the driving status data includes: The driving status data is analyzed to determine the driving mode as one of the following: economy mode, pure electric mode, or sport mode.

3. The vehicle drive control method according to claim 1, characterized in that, Using the driving status data, determining the engine power requirement includes: Based on the driving status data, determine the required drive power of the target vehicle's drive motor; The engine's required power is calculated using the target conversion rule and the required driving power, wherein the target conversion rule is determined by the hybrid drive architecture with dual motors connected in series.

4. The vehicle drive control method according to claim 1, characterized in that, Based on the preset speed threshold corresponding to the engine, the economic operating condition range, and the maximum torque data, the second operating strategy is constructed as follows: Within a first speed range, a first part of the second operating strategy is constructed based on the economic operating condition range, wherein the first speed range is a speed range less than the preset speed threshold, and the first part of the strategy is used to restrict the engine to operate within the economic operating condition range; Within the second speed range, based on the maximum torque data, a second part of the second operating strategy is constructed, wherein the second speed range is a speed range greater than or equal to the preset speed threshold, and the second part of the strategy is used to restrict the engine to operate at the maximum torque value corresponding to the real-time speed.

5. The vehicle drive control method according to claim 1, characterized in that, Determining the target operating strategy from the multiple operating strategies based on the driving mode, the accelerator pedal opening, and the engine power demand includes: In response to the fact that the driving mode is currently in economy mode, the first operating strategy is determined as the target operating strategy; In response to the driving mode not being in the economy mode, the second operating strategy is determined as the target operating strategy; In response to the accelerator pedal opening being greater than a preset opening threshold, the third operating strategy is determined as the target operating strategy.

6. The vehicle drive control method according to claim 1, characterized in that, Driving the engine according to the target operating strategy includes: In the target coordinate system, an isopower line corresponding to the engine's required power is generated, as well as an operating condition line for the target operating strategy is generated, wherein the target coordinate system is constructed based on the engine's speed and torque; The target operating condition is determined based on the equal power line and the operating condition line. Control the engine to output torque according to the target operating conditions.

7. A vehicle drive control device, characterized in that, include: The acquisition module is used to acquire driving status data of the target vehicle, wherein the target vehicle adopts a hybrid drive architecture with dual motors in series. The first determining module is used to determine the driving mode, accelerator pedal opening and engine power demand of the target vehicle using the driving status data. The second determining module is used to determine a target operating strategy from multiple operating strategies based on the driving mode, the accelerator pedal opening and the engine power demand. The multiple operating strategies are determined by the characteristic data of the engine, and the characteristic data is used to characterize at least the operating economy characteristics and the maximum torque characteristics. The multiple operating strategies include: a first operating strategy, a second operating strategy and a third operating strategy. The control module is used to drive the engine according to the target operating strategy; The second determining module is further configured to: acquire the characteristic data, wherein the characteristic data includes an economic operating condition range and maximum torque data, the economic operating condition range being used to determine the range of engine operating conditions that meet preset economic conditions, and the maximum torque data being used to determine the maximum torque value corresponding to the engine at different speeds; construct a first operating strategy based on the economic operating condition range, wherein the first operating strategy is used to restrict the engine to operate within the economic operating condition range; construct a second operating strategy according to a preset speed threshold corresponding to the engine, the economic operating condition range, and the maximum torque data; and construct a third operating strategy based on the maximum torque data, wherein the third operating strategy is used to restrict the engine to operate at the maximum torque value.

8. A storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the storage medium to perform the vehicle drive control method according to any one of claims 1 to 6.

9. A vehicle, characterized in that, It includes an on-board memory and an on-board processor, wherein the on-board memory stores a computer program, and the on-board processor is configured to run the computer program to perform the vehicle drive control method according to any one of claims 1 to 6.

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