Hybrid vehicle engine and three-electric coupling matching method and system in plateau environment

Abstract

The invention discloses a hybrid electric vehicle engine and three-electric coupling matching method in a plateau environment. The method comprises the steps that the power demand strength of a vehicle under the current operation working condition is calculated; the actual output capacity value of the engine under the current operation working condition is calculated, the actual output capacity is compared with the plain nominal output capacity value under the corresponding rotating speed, the engine capacity attenuation characteristic quantity reflecting the plateau environment influence is obtained, and the energy supply capacity value, capable of being used for vehicle driving, of the engine under the current plateau environment is determined; according to the current charge state and the allowable working range of the power battery, determining the energy release capacity value of the power battery in the current state, and combining the maximum allowable output capacity value of the motor to construct the energy bearing capacity characteristic quantity of the three-electric system capable of participating in vehicle driving in the current working condition; and when it is judged that the energy supply and demand mismatch exists and the three-electric system cannot independently meet the energy demand of the whole vehicle, an engine starting control instruction is generated.

Description

Technical Field

[0001] This invention belongs to the field of hybrid vehicle power system control technology in high-altitude environments, and more specifically, relates to a method and system for coupling and matching the engine and three electric components of a hybrid vehicle in high-altitude environments. Background Technology

[0002] In high-altitude environments, factors such as decreased air density and reduced air intake cause varying degrees of torque and power reduction in both naturally aspirated and turbocharged engines used in hybrid vehicles. Actual tests show that at an altitude of approximately 1900 meters, the engine's maximum usable power decreases by about 5% to 20% compared to conditions at lower altitudes, with this reduction becoming even more pronounced at higher altitudes. However, existing hybrid energy management strategies are mostly designed based on the nominal output capacity of the engine at lower altitudes. This reduction in engine capacity is not explicitly incorporated into the power distribution and energy balance logic, leading to frequent requests for power output from the engine that it cannot stably provide under high-altitude conditions, resulting in insufficient power or control oscillations.

[0003] In existing technologies, power battery SOC control is typically performed around a fixed target range or equilibrium point, such as maintaining a stable SOC between 20% and 25% to balance energy consumption and battery life. However, in high-altitude environments, due to the decrease in available engine power, the vehicle's reliance on electric motor assistance increases significantly. If a fixed SOC equilibrium range as used under flat conditions is still applied, it is highly likely that the battery discharge rate will accelerate, the SOC will quickly drop below the lower limit, and the engine will be passively triggered to charge or maintain power. This not only reduces the vehicle's power response but also causes frequent switching of energy management strategies, affecting driving smoothness and system stability.

[0004] In existing hybrid power control schemes, engine start-up is often determined based on discrete conditions such as SOC threshold, vehicle speed threshold, or driving mode, without fully considering the matching relationship between the vehicle's power demand intensity and the instantaneous supply capacity of the power system in high-altitude environments. When the vehicle is under high-load conditions such as acceleration and climbing in high-altitude areas, even if the three-electric system can support the power demand for a short period of time, the delayed or unreasonable engine start-up logic often leads to a rapid drop in SOC or the engine intervening at an inappropriate time, thereby reducing the overall vehicle efficiency.

[0005] Existing hybrid power systems generally rely on engine MAP (Motor Mapping Analysis) for torque and power control. However, MAP is typically calibrated under plain or standard environmental conditions, limiting its applicability in high-altitude environments. Although some solutions introduce correction factors, they still struggle to cover the complex and varied road conditions, environmental conditions, and differences in driving behavior at high altitudes. This results in a lack of adaptive control strategies, making it difficult to achieve optimal coordination between the engine and the three-electric system.

[0006] Therefore, there is an urgent need for a technical solution that can uniformly characterize and evaluate the energy characteristics of vehicle operation status, engine output capacity and energy carrying capacity of electric drive system in high-altitude environment, build a dynamic matching mechanism between vehicle energy demand and power system supply capacity, and realize adaptive and coordinated control of engine and electric drive system in high-altitude environment. Summary of the Invention

[0007] To address the above technical problems, this invention proposes a method for coupling and matching the engine and three-electric components of a hybrid vehicle in high-altitude environments, comprising: Step 101: During vehicle operation, collect data in real time on the vehicle's longitudinal speed, longitudinal acceleration, power battery state of charge, engine speed, and engine output torque. Step 102: Calculate the power demand intensity of the vehicle under the current operating conditions based on the vehicle's longitudinal velocity and longitudinal acceleration; Step 103: Calculate the actual output capacity of the engine under the current operating conditions based on the engine speed and engine output torque, and compare the actual output capacity with the nominal output capacity value at the corresponding speed in the plain to obtain the engine capacity attenuation characteristic quantity reflecting the influence of the plateau environment. Based on the engine capacity attenuation characteristic quantity, determine the energy supply capacity value of the engine that can be used for vehicle driving under the current plateau environment. Step 104: Based on the current state of charge of the power battery and its allowable operating range, determine the energy release capacity value of the power battery in the current state, and combine it with the maximum allowable output capacity value of the motor to construct the energy carrying capacity characteristic quantity of the three-electric system that can participate in vehicle driving under the current working conditions. Step 105: The power demand intensity, energy supply capacity value and energy carrying capacity characteristic quantity are comprehensively compared to determine whether there is an energy supply and demand mismatch in the vehicle power system under the current working condition. When it is determined that there is an energy supply and demand mismatch and the three electric systems cannot meet the energy demand of the whole vehicle on their own, an engine start control command is generated.

[0008] Furthermore, step 102 also includes: normalizing the intensity of energy demand.

[0009] Furthermore, step 106 is included, which dynamically adjusts the target SOC balance value of the power battery based on the characteristic of engine capacity decay, so that the target SOC of the power battery moves up accordingly when the engine capacity decreases, thereby enhancing the energy support capability of the three-electric system in high-altitude environments.

[0010] Furthermore, step 107 is included, which determines the power sharing ratio of the engine and the motor in the vehicle's power demand based on the engine's energy supply capacity and energy carrying capacity characteristics under the current operating conditions, and allocates the vehicle's power demand according to the power sharing ratio to achieve coordinated output of the engine and the three-electric system in the high-altitude environment.

[0011] This invention also proposes a hybrid vehicle engine and three-electric coupling matching system for high-altitude environments, comprising: The data acquisition module is used to collect data in real time during vehicle operation, including vehicle longitudinal speed, longitudinal acceleration, power battery state of charge, engine speed, and engine output torque. The power demand intensity calculation module is used to calculate the power demand intensity of the vehicle under the current operating conditions based on the vehicle's longitudinal speed and longitudinal acceleration. The energy supply capacity calculation module is used to calculate the actual output capacity of the engine under the current operating conditions based on the engine speed and engine output torque, and compare the actual output capacity with the nominal output capacity value at the corresponding speed in the plain to obtain the engine capacity attenuation characteristic quantity reflecting the influence of the plateau environment. Based on the engine capacity attenuation characteristic quantity, the energy supply capacity value of the engine that can be used for vehicle driving under the current plateau environment is determined. The module for calculating energy carrying capacity characteristics is used to determine the energy release capacity value of the power battery under the current state of charge and its allowable operating range, and to construct the energy carrying capacity characteristics of the three-electric system that can participate in vehicle driving under the current operating conditions, in combination with the maximum allowable output capacity value of the motor. The matching module is used to comprehensively compare the intensity of power demand with the value of energy supply capacity and the characteristic quantity of energy carrying capacity to determine whether there is an energy supply and demand mismatch in the vehicle power system under the current operating conditions. When it is determined that there is an energy supply and demand mismatch and the three electric systems cannot meet the energy demand of the whole vehicle on their own, an engine start control command is generated.

[0012] Furthermore, the module for calculating power demand intensity also includes normalizing the power demand intensity.

[0013] Furthermore, it also includes an adjustment module, which dynamically adjusts the target SOC balance value of the power battery based on the characteristics of engine capacity decay, so that the target SOC of the power battery moves up accordingly when the engine capacity decreases, thereby enhancing the energy support capability of the three-electric system in high-altitude environments.

[0014] Furthermore, it also includes a collaborative output module, which is used to determine the power sharing ratio of the engine and the motor in the vehicle's power demand based on the engine's energy supply capacity and energy carrying capacity characteristics under the current operating conditions, and to allocate the vehicle's power demand according to the power sharing ratio, so as to realize the collaborative output of the engine and the three-electric system in the high-altitude environment.

[0015] The present invention also proposes an electronic device, including a processor and a storage medium connected to the processor, the storage medium storing multiple instructions, which can be loaded and executed by the processor to enable the processor to execute the aforementioned method for coupling and matching the hybrid vehicle engine and its three electric components in a high-altitude environment.

[0016] The present invention also proposes a storage medium storing multiple instructions, which are used to implement the above-described method for coupling and matching the hybrid vehicle engine and its three electric components in a high-altitude environment.

[0017] In summary, the technical solutions conceived by this invention have the following beneficial effects compared with the prior art: This invention establishes a dynamic matching mechanism between vehicle energy demand and power system supply capacity by uniformly characterizing and online evaluating the vehicle's operating status, engine output capacity, and the energy carrying capacity of the three-electric system in high-altitude environments. This enables adaptive and coordinated control of the engine and the three-electric system in high-altitude environments. By introducing engine capacity decay characteristics and dynamically shifting the battery state-of-charge balance range accordingly, it avoids the problems of power preservation strategy failure, SOC drift, and insufficient power caused by engine power reduction in traditional hybrid vehicles under high-altitude conditions. Simultaneously, by determining the power sharing ratio based on real-time capability constraints, it eliminates the reliance on fixed MAP maps and single calibration strategies, making engine start-up timing and power distribution more aligned with high-altitude road conditions and driving needs. This effectively improves the power responsiveness, energy utilization efficiency, and overall vehicle stability of hybrid vehicles in high-altitude environments. Attached Figure Description

[0018] Figure 1 This is a flowchart of the method in Embodiment 1 of the present invention; Figure 2 This is a system structure diagram of Embodiment 2 of the present invention. Detailed Implementation

[0019] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0020] The method provided by this invention can be implemented in a terminal environment that may include one or more of the following components: a processor, a storage medium, and a display screen. The storage medium stores at least one instruction, which is loaded and executed by the processor to implement the method described in the following embodiments.

[0021] A processor may include one or more processing cores. The processor uses various interfaces and lines to connect various parts of the terminal, and performs various functions and processes data by running or executing instructions, programs, code sets or instruction sets stored in the storage medium, and by calling data stored in the storage medium.

[0022] Storage media can include random access memory (RAM) or read-only memory (ROM). Storage media can be used to store instructions, programs, code, code sets, or instructions.

[0023] The display screen is used to show the user interface of each application.

[0024] In addition, those skilled in the art will understand that the structure of the terminal described above does not constitute a limitation on the terminal. The terminal may include more or fewer components, or combine certain components, or have different component arrangements. For example, the terminal may also include radio frequency circuits, input units, sensors, audio circuits, power supplies, and other components, which will not be described in detail here.

[0025] Example 1 like Figure 1 As shown in the figure, this embodiment proposes a method for coupling and matching the engine and three-electric system of a hybrid vehicle in a high-altitude environment, including: Step 101: During vehicle operation, collect data in real time on the vehicle's longitudinal speed, longitudinal acceleration, power battery state of charge, engine speed, and engine output torque. Step 102: Calculate the power demand intensity of the vehicle under the current operating conditions based on the vehicle's longitudinal velocity (the velocity component of the vehicle along its direction of travel) and longitudinal acceleration (the acceleration component of the vehicle along its direction of travel). Specifically, step 102 also includes: normalizing the intensity of energy demand.

[0026] Preferably, in this embodiment, the power demand intensity is normalized in the following way: in, For time Time-normalized intensity of energy demand For time The instantaneous power demand of the entire vehicle can be determined based on time. The longitudinal velocity and longitudinal acceleration of the vehicle are multiplied to obtain the result. , To calibrate the reference power.

[0027] Step 103: Calculate the actual output capacity of the engine under the current operating conditions based on the engine speed and engine output torque, and compare the actual output capacity with the nominal output capacity value at the corresponding speed in the plain to obtain the engine capacity attenuation characteristic quantity reflecting the influence of the plateau environment. Based on the engine capacity attenuation characteristic quantity, determine the energy supply capacity value of the engine that can be used for vehicle driving under the current plateau environment. Preferably, under high-altitude conditions, the engine's "nominal capability" fails, and the actual available capability must be assessed in real time to determine whether the three-electric system (battery, motor, and electronic control system) needs to be activated. Specifically, this includes: Define the characteristic quantity of engine capability decay: in, For time The characteristic quantity of engine capability decay during operation. For time At that time, the engine output torque, For time At that time, engine speed, This is the actual output capability value. To maintain engine speed The nominal power of the plain (nominal output capacity value of the plain).

[0028] Determining the engine's energy supply capacity for vehicle propulsion in the current high-altitude environment includes: in, For time Energy supply capacity value.

[0029] Step 104: Based on the current state of charge of the power battery and its allowable operating range, determine the energy release capacity value of the power battery in the current state, and combine it with the maximum allowable output capacity value of the motor to construct the energy carrying capacity characteristic quantity of the three-electric system that can participate in vehicle driving under the current working conditions. Preferably, the portion of the engine's capacity that is insufficient must be handled by the "three-electric system," as detailed below: Define energy release capacity value: in, For time Energy release capacity value at time For time Current state of charge of the power battery This represents the minimum state of charge of the power battery. This represents the maximum state of charge (SOC) of the power battery.

[0030] Calculate the characteristic quantities of energy carrying capacity: in, For time Energy carrying capacity characteristic quantity. This represents the motor's maximum permissible output capacity (maximum output power).

[0031] Step 105: The power demand intensity, energy supply capacity value and energy carrying capacity characteristic quantity are comprehensively compared to determine whether there is an energy supply and demand mismatch in the vehicle power system under the current working condition. When it is determined that there is an energy supply and demand mismatch and the three electric systems cannot meet the energy demand of the whole vehicle on their own, an engine start control command is generated.

[0032] Preferably, whether to start the engine is no longer based on SOC or vehicle speed, but rather on whether there is energy mismatch in the system, specifically including: Define energy mismatch: in, For time Energy mismatch at time.

[0033] Engine start trigger function: in, For time Engine start indication value at time For a small positive threshold, when When the value is 1, an engine start control command is generated.

[0034] Specifically, it also includes step 106, which dynamically adjusts the target SOC balance value of the power battery based on the engine capacity decay characteristics, so that the target SOC of the power battery moves up accordingly when the engine capacity decreases, thereby enhancing the energy support capability of the three-electric system in the high-altitude environment.

[0035] Preferably, since engine capability decreases, the State of Charge (SOC) equilibrium point must be "shifted upwards," but this upward shift cannot be a fixed value. Specifically, it includes: in, For time SOC balance offset at time This is an empirical proportionality coefficient.

[0036] Target SOC equilibrium value: in, For time Target SOC balance value at time This refers to the center value of the target range of the reference state of charge, which is pre-calibrated for the vehicle under standard plain environmental conditions to achieve energy balance between the engine and the three-electric system.

[0037] Specifically, it also includes step 107, which determines the power sharing ratio of the engine and the motor in the vehicle's power demand based on the engine's energy supply capacity and energy carrying capacity characteristics under the current operating conditions, and allocates the vehicle's power demand according to the power sharing ratio to achieve coordinated output of the engine and the three-electric system in the high-altitude environment.

[0038] Preferably, the power allocation weights are calculated: in, For time Engine power distribution weights For time The power allocation weight of the motor.

[0039] Calculate the actual output power: in, For the engine in time The actual output power is allocated to meet the vehicle's power requirements in high-altitude environments. For the motor in time The actual output power is allocated to meet the power needs of the entire vehicle in high-altitude environments.

[0040] Example 2 like Figure 2 As shown, this embodiment proposes a hybrid vehicle engine and three-electric coupling matching system for high-altitude environments, including: The data acquisition module is used to collect data in real time during vehicle operation, including vehicle longitudinal speed, longitudinal acceleration, power battery state of charge, engine speed, and engine output torque. The power demand intensity calculation module is used to calculate the power demand intensity of the vehicle under the current operating conditions based on the vehicle's longitudinal velocity (the velocity component of the vehicle along its direction of travel) and longitudinal acceleration (the acceleration component of the vehicle along its direction of travel). Specifically, the module for calculating power demand intensity also includes normalizing the power demand intensity.

[0041] Preferably, in this embodiment, the power demand intensity is normalized in the following way: in, For time Time-normalized intensity of energy demand For time The instantaneous power demand of the entire vehicle can be determined based on time. The longitudinal velocity and longitudinal acceleration of the vehicle are multiplied to obtain the result. , To calibrate the reference power.

[0042] The energy supply capacity calculation module is used to calculate the actual output capacity of the engine under the current operating conditions based on the engine speed and engine output torque, and compare the actual output capacity with the nominal output capacity value at the corresponding speed in the plain to obtain the engine capacity attenuation characteristic quantity reflecting the influence of the plateau environment. Based on the engine capacity attenuation characteristic quantity, the energy supply capacity value of the engine that can be used for vehicle driving under the current plateau environment is determined. Preferably, under high-altitude conditions, the engine's "nominal capability" fails, and the actual available capability must be assessed in real time to determine whether the three-electric system (battery, motor, and electronic control system) needs to be activated. Specifically, this includes: Define the characteristic quantity of engine capability decay: in, For time The characteristic quantity of engine capability decay during operation. For time At that time, the engine output torque, For time At that time, engine speed, This is the actual output capability value. To maintain engine speed The nominal power of the plain (nominal output capacity value of the plain).

[0043] Determining the engine's energy supply capacity for vehicle propulsion in the current high-altitude environment includes: in, For time Energy supply capacity value.

[0044] The module for calculating energy carrying capacity characteristics is used to determine the energy release capacity value of the power battery under the current state of charge and its allowable operating range, and to construct the energy carrying capacity characteristics of the three-electric system that can participate in vehicle driving under the current operating conditions, in combination with the maximum allowable output capacity value of the motor. Preferably, the portion of the engine's capacity that is insufficient must be handled by the "three-electric system," as detailed below: Define energy release capacity value: in, For time Energy release capacity value at time For time Current state of charge of the power battery This represents the minimum state of charge of the power battery. This represents the maximum state of charge (SOC) of the power battery.

[0045] Calculate the characteristic quantities of energy carrying capacity: in, For time Energy carrying capacity characteristic quantity. This represents the motor's maximum permissible output capacity (maximum output power).

[0046] The matching module is used to comprehensively compare the intensity of power demand with the value of energy supply capacity and the characteristic quantity of energy carrying capacity to determine whether there is an energy supply and demand mismatch in the vehicle power system under the current operating conditions. When it is determined that there is an energy supply and demand mismatch and the three electric systems cannot meet the energy demand of the whole vehicle on their own, an engine start control command is generated.

[0047] Preferably, whether to start the engine is no longer based on SOC or vehicle speed, but rather on whether there is energy mismatch in the system, specifically including: Define energy mismatch: in, For time Energy mismatch at time.

[0048] Engine start trigger function: in, For time Engine start indication value at time For a small positive threshold, when When the value is 1, an engine start control command is generated.

[0049] Specifically, it also includes a module for calculating energy support capability, which is used to dynamically adjust the target SOC balance value of the power battery based on the characteristics of engine capacity decay, so that the target SOC of the power battery will be shifted upward when the engine capacity decreases, thereby enhancing the energy support capability of the three-electric system in high-altitude environments.

[0050] Preferably, since engine capability decreases, the State of Charge (SOC) equilibrium point must be "shifted upwards," but this upward shift cannot be a fixed value. Specifically, it includes: in, For time SOC balance offset at time This is an empirical proportionality coefficient.

[0051] Target SOC equilibrium value: in, For time Target SOC balance value at time This refers to the center value of the target range of the reference state of charge, which is pre-calibrated for the vehicle under standard plain environmental conditions to achieve energy balance between the engine and the three-electric system.

[0052] Specifically, it also includes a collaborative output module, which is used to determine the power sharing ratio of the engine and motor in the vehicle's power demand based on the engine's energy supply capacity and energy carrying capacity characteristics under the current operating conditions, and to allocate the vehicle's power demand according to the power sharing ratio, so as to realize the collaborative output of the engine and the three-electric system in the high-altitude environment.

[0053] Preferably, the power allocation weights are calculated: in, For time Engine power distribution weights For time The power allocation weight of the motor.

[0054] Calculate the actual output power: in, For the engine in time The actual output power is allocated to meet the vehicle's power requirements in high-altitude environments. For the motor in time The actual output power is allocated to meet the power needs of the entire vehicle in high-altitude environments.

[0055] Example 3 This invention also proposes a storage medium storing multiple instructions for implementing the hybrid vehicle engine and its three-electric coupling matching method in a high-altitude environment.

[0056] Optionally, in this embodiment, the storage medium may be located in any computer terminal in a group of computer terminals in a computer network, or in any mobile terminal in a group of mobile terminals.

[0057] Optionally, in this embodiment, the storage medium is configured to store program code for performing the method steps as described in Embodiment 1.

[0058] Example 4 This invention also proposes an electronic device, including a processor and a storage medium connected to the processor. The storage medium stores multiple instructions, which can be loaded and executed by the processor to enable the processor to execute the aforementioned method for coupling and matching a hybrid vehicle engine and its three electric components in a high-altitude environment.

[0059] Specifically, the electronic device in this embodiment can be a computer terminal, which may include one or more processors and a storage medium.

[0060] The storage medium can be used to store software programs and modules, such as the hybrid vehicle engine and three-electric coupling matching method in a high-altitude environment according to an embodiment of the present invention. The corresponding program instructions / modules are executed by the processor through running the software programs and modules stored in the storage medium, thereby performing various functional applications and data processing, thus realizing the aforementioned hybrid vehicle engine and three-electric coupling matching method in a high-altitude environment. The storage medium may include high-speed random access storage media, and may also include non-volatile storage media, such as one or more magnetic storage systems, flash memory, or other non-volatile solid-state storage media. In some instances, the storage medium may further include storage media remotely configured relative to the processor, which can be connected to the 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.

[0061] The processor can invoke information and applications stored in the storage medium via the transmission system to execute the method steps as described in Example 1.

[0062] 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.

[0063] In the several embodiments provided by this invention, it should be understood that the disclosed technical content can be implemented in other ways. The system embodiments described above are merely illustrative; for example, the division of units is only 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 coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection between units or modules, and may be electrical or other forms.

[0064] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0065] 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.

[0066] 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: USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, optical disks, and other media capable of storing program code.

[0067] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A method for coupling and matching the engine and three-electric system of a hybrid vehicle in a high-altitude environment, characterized in that, include: Step 101: During vehicle operation, collect data in real time on the vehicle's longitudinal speed, longitudinal acceleration, power battery state of charge, engine speed, and engine output torque. Step 102: Calculate the power demand intensity of the vehicle under the current operating conditions based on the vehicle's longitudinal velocity and longitudinal acceleration; Step 103: Calculate the actual output capacity of the engine under the current operating conditions based on the engine speed and engine output torque, and compare the actual output capacity with the nominal output capacity value at the corresponding speed in the plain to obtain the engine capacity attenuation characteristic quantity reflecting the influence of the plateau environment. Based on the engine capacity attenuation characteristic quantity, determine the energy supply capacity value of the engine that can be used for vehicle driving under the current plateau environment. Step 104: Based on the current state of charge of the power battery and its allowable operating range, determine the energy release capacity value of the power battery in the current state, and combine it with the maximum allowable output capacity value of the motor to construct the energy carrying capacity characteristic quantity of the three-electric system that can participate in vehicle driving under the current working conditions. Step 105: The power demand intensity, energy supply capacity value and energy carrying capacity characteristic quantity are comprehensively compared to determine whether there is an energy supply and demand mismatch in the vehicle power system under the current working condition. When it is determined that there is an energy supply and demand mismatch and the three electric systems cannot meet the energy demand of the whole vehicle on their own, an engine start control command is generated.

2. The method for coupling and matching hybrid vehicle engine and three-electric system in a high-altitude environment as described in claim 1, characterized in that, Step 102 also includes: normalizing the intensity of energy demand.

3. The method for coupling and matching hybrid vehicle engine and three-electric system in a high-altitude environment as described in claim 2, characterized in that, It also includes step 106, which dynamically adjusts the target SOC balance value of the power battery based on the characteristic of engine capacity decay, so that the target SOC of the power battery moves up accordingly when the engine capacity decreases, thereby enhancing the energy support capability of the three-electric system in the high-altitude environment.

4. The method for coupling and matching hybrid vehicle engine and three-electric system in a high-altitude environment as described in claim 1, characterized in that, It also includes step 107, which determines the power sharing ratio of the engine and the motor in the vehicle's power demand based on the engine's energy supply capacity and energy carrying capacity characteristics under the current operating conditions, and allocates the vehicle's power demand according to the power sharing ratio to achieve coordinated output of the engine and the three-electric system in the high-altitude environment.

5. A hybrid vehicle engine and its three-electric coupling and matching system for high-altitude environments, characterized in that, include: The data acquisition module is used to collect data in real time during vehicle operation, including vehicle longitudinal speed, longitudinal acceleration, power battery state of charge, engine speed, and engine output torque. The power demand intensity calculation module is used to calculate the power demand intensity of the vehicle under the current operating conditions based on the vehicle's longitudinal speed and longitudinal acceleration. The energy supply capacity calculation module is used to calculate the actual output capacity of the engine under the current operating conditions based on the engine speed and engine output torque, and compare the actual output capacity with the nominal output capacity value at the corresponding speed in the plain to obtain the engine capacity attenuation characteristic quantity reflecting the influence of the plateau environment. Based on the engine capacity attenuation characteristic quantity, the energy supply capacity value of the engine that can be used for vehicle driving under the current plateau environment is determined. The module for calculating energy carrying capacity characteristics is used to determine the energy release capacity value of the power battery under the current state of charge and its allowable operating range, and to construct the energy carrying capacity characteristics of the three-electric system that can participate in vehicle driving under the current operating conditions, in combination with the maximum allowable output capacity value of the motor. The matching module is used to comprehensively compare the intensity of power demand with the value of energy supply capacity and the characteristic quantity of energy carrying capacity to determine whether there is an energy supply and demand mismatch in the vehicle power system under the current operating conditions. When it is determined that there is an energy supply and demand mismatch and the three electric systems cannot meet the energy demand of the whole vehicle on their own, an engine start control command is generated.

6. The hybrid vehicle engine and three-electric coupling matching system for high-altitude environments as described in claim 5, characterized in that, The module for calculating power demand intensity also includes normalizing the power demand intensity.

7. The hybrid vehicle engine and three-electric coupling matching system for high-altitude environments as described in claim 6, characterized in that, It also includes an adjustment module, which dynamically adjusts the target SOC balance value of the power battery based on the characteristics of engine capacity decay, so that the target SOC of the power battery moves up accordingly when the engine capacity decreases, thereby enhancing the energy support capability of the three-electric system in high-altitude environments.

8. The hybrid vehicle engine and three-electric coupling matching system for high-altitude environments as described in claim 5, characterized in that, It also includes a collaborative output module, which is used to determine the power sharing ratio of the engine and the motor in the vehicle's power demand based on the engine's energy supply capacity and energy carrying capacity characteristics under the current operating conditions, and to allocate the vehicle's power demand according to the power sharing ratio, so as to realize the collaborative output of the engine and the three-electric system in the high-altitude environment.

9. An electronic device comprising a processor and a storage medium connected to the processor, the storage medium storing a plurality of instructions which can be loaded and executed by the processor to enable the processor to perform a method for coupling and matching a hybrid vehicle engine and its three electric components in a high-altitude environment as described in any one of claims 1-4.

10. A storage medium storing a plurality of instructions, said instructions being used to implement a method for coupling and matching a hybrid vehicle engine and its three electric components in a high-altitude environment as described in any one of claims 1-4.

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