A hybrid vehicle control method, vehicle and storage medium

Abstract

The application provides a hybrid vehicle control method, a vehicle and a storage medium, and belongs to the field of vehicle control. The method comprises the following steps: obtaining working condition parameters of the vehicle, wherein the working condition parameters comprise engine coolant temperature; adjusting the state of the engine of the vehicle based on the working condition parameters to reduce emissions; and controlling the driving motor of the vehicle based on the adjustment of the state of the engine. In this way, the vehicle can be ensured to travel normally under different working conditions, and the power source for vehicle travel can be adjusted to reduce engine exhaust emissions.

Description

Technical Field

[0001] This application relates to the field of vehicles, and more specifically, to a hybrid vehicle control method, a vehicle, and a storage medium in the field of vehicles. Background Technology

[0002] With increasing global awareness of environmental protection, reducing vehicle emissions has become an urgent environmental goal. Diesel / gasoline engines, due to their efficient combustion characteristics, are widely used in commercial vehicles, heavy machinery, ships, and power generation equipment. However, the harmful substances they emit, especially nitrogen oxides (NOx) and particulate matter (PM), pose a serious threat to air quality and human health. Therefore, how to effectively reduce diesel engine emissions has become an urgent problem that needs to be solved. Summary of the Invention

[0003] This application provides a hybrid vehicle control method, a vehicle, and a storage medium, which can reduce exhaust emissions from hybrid vehicles.

[0004] Firstly, a hybrid vehicle control method is provided, the method comprising: Obtain the vehicle's operating parameters, including engine coolant temperature; The vehicle's engine status is adjusted based on these operating parameters to reduce emissions; The vehicle's drive motor is controlled based on adjustments made to the engine's status.

[0005] Through the above technical solution, when a hybrid vehicle has two power systems, an engine and a drive motor, the state of the vehicle's engine is adjusted according to the obtained operating parameters of the vehicle. These operating parameters include at least the engine coolant temperature. The state of the vehicle's motor is adjusted accordingly based on the state of the engine, making full use of the two power sources to drive the vehicle and reducing exhaust emissions under different operating conditions.

[0006] In conjunction with the first aspect, in some possible implementations, the operating condition parameters also include engine power parameters, the remaining charge of the power battery, and the vehicle's required torque. The engine power parameters include fuel injection quantity. Adjusting the vehicle's engine state based on the operating condition parameters includes: determining whether the engine is in a hot engine condition based on the engine coolant temperature; determining whether the engine is in a high power demand condition based on the engine power parameters; when the engine is in a high power demand condition, determining whether the remaining charge of the power battery is greater than a first charge threshold; if the remaining charge of the power battery is greater than the first charge threshold, determining whether the maximum output torque of the drive motor is less than the vehicle's required torque; if the maximum output torque of the drive motor is not less than the vehicle's required torque... To determine torque, the engine is adjusted to not output torque. If the maximum output torque of the vehicle's drive motor is determined to be less than the vehicle's required torque, the engine is adjusted to operate within the economic range. If the remaining charge of the power battery is determined to be less than or equal to a first charge threshold, the engine is adjusted to operate on the optimal operating curve or the external characteristic curve based on the vehicle's required torque. When the engine is not under high power demand conditions, the remaining charge of the power battery is determined to be greater than the first charge threshold. If the remaining charge of the power battery is determined to be greater than the first charge threshold, the engine is adjusted to not output torque. If the remaining charge of the power battery is determined to be less than or equal to the first charge threshold, the engine is adjusted to operate within the economic range.

[0007] The aforementioned technical solution provides an engine state adjustment scheme under hot engine conditions. After determining that the engine is in a hot engine condition based on the engine coolant temperature, the engine's power parameters are further obtained to determine whether the engine is in a high power demand condition. Under a high power demand condition, the engine needs to undergo transient enrichment to increase fuel injection to improve torque responsiveness and meet vehicle acceleration performance requirements. However, increasing fuel injection raises the in-cylinder combustion temperature, leading to increased exhaust emissions. Therefore, engine operation needs to be reduced. If the remaining battery charge is greater than a first charge threshold and the maximum output torque of the drive motor is greater than the vehicle's required torque, the engine is controlled to not output torque to reduce emissions. If the maximum output torque of the drive motor is less than the vehicle's required torque, the engine is controlled to operate within the economic range, providing supplementary power with optimal fuel consumption and emissions. If the remaining battery charge is less than or equal to the first charge threshold, only engine operation is possible. In this case, the engine is controlled to operate on the optimal operating curve or the external characteristic curve based on the vehicle's required torque. When the engine is not under high power demand, the vehicle may be in a low load state or idling. The engine status is determined based on the remaining charge of the power battery, and the vehicle's power source prioritizes the power battery for driving, reducing emissions from the engine at low speeds.

[0008] In conjunction with the first aspect and the above implementation methods, in some possible implementations, the drive motor includes a first motor and a second motor. Controlling the vehicle's drive motor based on the engine's state adjustment includes: when the engine's state is adjusted to not output torque, if the vehicle's required torque is less than or equal to the maximum output torque of the first motor, then controlling the output torque of the first motor based on the vehicle's required torque; if the vehicle's required torque is greater than the maximum output torque of the first motor and less than or equal to the sum of the maximum output torque of the first motor and the maximum output torque of the second motor, then controlling the output torque of both the first motor and the second motor based on the vehicle's required torque; when the engine is in a high-power-demand condition and the engine's state is adjusted to operate in the economic range, if the vehicle's required torque is greater than the engine's maximum output torque, then controlling the output torque of both the first motor and the second motor based on the vehicle's required torque; The output torque is controlled based on the difference between the vehicle's required torque and the engine's output torque. When the engine is not under high power demand and is operating within its economic range, if the engine's output torque is greater than the vehicle's required torque, the charging torque is determined based on both the engine's output torque and the vehicle's required torque, and the first and / or second motors are controlled to charge the power battery based on this charging torque. When the engine is operating on its optimal operating curve or its external characteristic curve, if the engine's output torque is greater than the vehicle's required torque, the charging torque is determined based on both the engine's output torque and the vehicle's required torque, and the first and / or second motors are controlled to charge the power battery based on this charging torque.

[0009] The above technical solution provides a drive motor control method under hot engine conditions. The drive motor includes a first motor and a second motor. When the engine is not outputting torque, the first motor and / or the second motor are selected to drive the vehicle based on the vehicle's required torque. When the engine is in a high-power-demand condition and operating within the economic range, if the engine's output torque cannot meet the vehicle's required torque, the first motor and / or the second motor are controlled to drive the vehicle to supplement torque. When the engine is not in a high-power-demand condition and operating within the economic range, if the engine's output torque within the economic range is greater than the vehicle's required torque, the charging torque is determined based on the engine's output torque and the vehicle's required torque, and the remaining charging torque provided by the engine is used to charge the power battery. Similarly, when the engine is adjusted to operate on the optimal operating curve or the external characteristic curve, if the engine's output torque is greater than the vehicle's required torque, the charging torque is determined based on the engine's output torque and the vehicle's required torque, and the first motor and / or the second motor are controlled to charge the power battery based on this charging torque.

[0010] In combination with the first aspect and the above implementation methods, in some possible implementation methods, adjusting the state of the engine to operate on the optimal operating curve or the external characteristic curve based on the vehicle's required torque includes: adjusting the state of the engine to operate on the optimal operating curve when the vehicle's required torque is less than or equal to the output torque of the engine operating on the optimal operating curve; and adjusting the state of the engine to operate on the external characteristic curve when the vehicle's required torque is greater than the output torque of the engine operating on the optimal operating curve.

[0011] The aforementioned technical solution provides a specific method for controlling the engine based on the vehicle's required torque when the engine is under high power demand conditions and the remaining charge of the power battery is less than or equal to a first charge threshold. Since the engine's emissions are better when operating on its optimal operating curve compared to its external characteristic curve, the system first determines whether the vehicle's required torque is less than or equal to the engine's output torque when operating on its optimal operating curve. If so, the engine is adjusted to operate on its optimal operating curve; otherwise, it is adjusted to operate on its external characteristic curve. The engine's operating torque must not exceed the maximum torque of the external characteristic curve to avoid an increase in engine cylinder temperature, which could lead to worsened vehicle emissions.

[0012] In conjunction with the first aspect and the above implementation methods, in some possible implementation methods, the operating condition parameter also includes the remaining charge of the power battery and the required torque of the vehicle. Adjusting the engine state based on this operating condition parameter includes: determining whether the remaining charge of the power battery is greater than a second charge threshold when the engine is in a warm-up state based on the engine coolant temperature; if the remaining charge of the power battery is greater than the second charge threshold, determining whether the required torque of the vehicle is less than or equal to the output torque of the engine when operating in the economic range; if the required torque of the vehicle is less than or equal to the output torque of the engine when operating in the economic range, adjusting the engine state to output torque based on the required torque of the vehicle; if the required torque of the vehicle is greater than the output torque of the engine when operating in the economic range, adjusting the engine state to operate in the economic range; and if the remaining charge of the power battery is less than or equal to the second charge threshold, adjusting the engine state to operate according to the external characteristic curve.

[0013] The aforementioned technical solution provides an engine state control method under warm-up conditions. When the engine is determined to be in warm-up condition based on the engine coolant temperature, the engine operation is controlled based on the remaining charge of the power battery and the vehicle's required torque, allowing the engine coolant temperature to quickly reach normal operating temperature. When the remaining power battery charge is sufficient, the engine is prioritized to operate within its optimal fuel-efficient range. When the remaining power battery charge is insufficient, the engine's output is controlled according to its external characteristic curve. By controlling the engine to operate only at the maximum output torque of its external characteristic curve, the problem of excessive fuel injection leading to increased cylinder temperature and consequently increased exhaust emissions can be avoided.

[0014] In conjunction with the first aspect and the above-described implementations, in some possible implementations, controlling the vehicle's drive motor based on adjustments to the engine's state includes: when the vehicle's engine is adjusted to operate within its economic range, controlling the drive motor's output torque based on the difference between the vehicle's required torque and the engine's output torque; when the engine is adjusted to operate on its external characteristic curve, if the engine's output torque is greater than the vehicle's required torque, determining a charging torque based on the engine's output torque and the vehicle's required torque, and controlling the drive motor to charge the power battery based on the charging torque; if the engine's output torque is less than or equal to the vehicle's required torque, controlling the drive motor's output torque based on the difference between the vehicle's required torque and the engine's output torque.

[0015] The above technical solution provides a drive motor control scheme for warm-up conditions. When the vehicle's required torque is greater than the engine's output torque in its economic operating range, and the engine is operating within its economic range, the drive motor's output torque is controlled based on the difference between the vehicle's required torque and the engine's output torque, thus supplementing power through the drive motor. When the engine is adjusted to operate according to its external characteristic curve, if the output torque under the external characteristic curve is greater than the vehicle's required torque, the remaining engine torque is used to charge the battery; if the output torque under the external characteristic curve is less than or equal to the vehicle's required torque, the drive motor supplements torque.

[0016] In conjunction with the first aspect and the above implementation methods, in some possible implementation methods, the operating condition parameter also includes the remaining charge of the power battery. Adjusting the state of the vehicle's engine based on the operating condition parameter includes: when the engine is in a cold engine condition based on the engine coolant temperature, determining whether the remaining charge of the power battery is greater than a third charge threshold; if the remaining charge of the power battery is greater than the third charge threshold, adjusting the state of the engine to be stopped or not started; if the remaining charge of the power battery is less than or equal to the third charge threshold, adjusting the state of the engine to prohibit fuel injection and be driven by the drive motor.

[0017] The above technical solution provides an engine state control method when the engine is in a cold start condition. Based on the engine coolant temperature, when the engine is determined to be in a cold start condition, since engine pollutants are generated in greater quantities during cold starts, engine operation in a low-temperature state should be avoided. When the remaining charge of the power battery is greater than a third charge threshold, the engine state is determined to be stopped or not started, and the engine is not used for driving. When the remaining charge of the power battery is less than or equal to the third charge threshold, the engine state is adjusted to prohibit fuel injection and driven by the drive motor. This allows the engine to agitate the oil and increase the oil temperature when driven by the drive motor, so that the engine can be used to drive the vehicle after the engine coolant temperature rises.

[0018] In conjunction with the first aspect and the above-described implementations, in some possible implementations, the operating condition parameter further includes the vehicle's required torque. Controlling the vehicle's drive motor based on the engine's state adjustment includes: controlling the drive motor's output torque based on the vehicle's required torque when the engine's state is adjusted to be stopped or not started; determining the drag torque based on the engine's resistance when the engine's state is adjusted to be off-gassing and driven by the drive motor, and controlling the drive motor's output torque based on the sum of the vehicle's required torque and the drag torque; and further, when the engine's state is adjusted to be off-gassing and driven by the drive motor, the method also includes: preheating the engine using the coolant from the power battery.

[0019] In the above technical solution, the vehicle's drive motor is controlled based on the vehicle's required torque and the engine's status. Under cold engine conditions, if the engine is stopped or not started, the drive motor's output torque is controlled based on the vehicle's required torque. When the engine is in a state where fuel injection is prohibited and the engine is driven, the drive motor, in addition to the required torque, must provide the torque needed to drive the engine. The towing torque is determined based on the engine resistance, and then the drive motor's output torque is controlled based on the vehicle's required torque and the towing torque to meet both vehicle driving and engine rotation needs. Furthermore, the engine can be preheated using the battery's coolant temperature. After a period of operation, the battery temperature will rise, leading to a higher coolant temperature. This coolant is then supplied to the engine, and the engine is preheated using the battery's coolant temperature, thus reducing engine emissions.

[0020] In a second aspect, a vehicle is provided, comprising: a memory for storing executable program code; and a processor for calling and running the executable program code from the memory to perform the methods described in the first aspect or any possible implementation thereof.

[0021] Thirdly, a computer-readable storage medium is provided that stores computer program code, which, when executed on a computer, causes the computer to perform the methods described in the first aspect or any possible implementation thereof. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a scenario for a hybrid vehicle control method provided in an embodiment of this application; Figure 2 This is a schematic flowchart of a hybrid vehicle control method provided in an embodiment of this application; Figure 3 This is a schematic flowchart of a hybrid vehicle control method provided in an embodiment of this application; Figure 4 This is a schematic flowchart of a hybrid vehicle control method provided in an embodiment of this application; Figure 5 This is a schematic flowchart of a hybrid vehicle control method provided in an embodiment of this application; Figure 6 This is a schematic diagram of a vehicle system provided in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of a vehicle provided in an embodiment of this application. Detailed Implementation

[0023] The technical solutions in this application will be clearly and thoroughly described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in the text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more than two.

[0024] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0025] Please see Figure 1 , Figure 1 This is a schematic diagram illustrating a scenario of a hybrid vehicle control method provided in an embodiment of this application. For example... Figure 1As shown in the embodiments of this application, the hybrid vehicle control method is applicable to hybrid electric vehicles. The power source of a hybrid electric vehicle typically includes an engine and a drive motor, with the drive motor powered by a power battery. Hybrid vehicles emit exhaust gases when driven by an engine; therefore, effectively reducing vehicle exhaust emissions is a pressing issue.

[0026] To address the aforementioned issues, this application provides a hybrid vehicle control method. This method acquires vehicle operating parameters, including engine coolant temperature, and adjusts the engine's state based on these parameters to reduce emissions. The method then controls the vehicle's drive motor based on these engine state adjustments. Under different operating conditions, while ensuring normal vehicle operation, the vehicle controller controls the vehicle's power source to reduce engine operating time or control the engine to operate in an economical emission mode, thereby reducing engine exhaust emissions.

[0027] based on Figure 1 The scene diagram shown below will be combined with... Figures 2-6 This application provides a detailed description of the hybrid vehicle control method provided in its embodiments.

[0028] Please see Figure 2 , Figure 2 This is a schematic flowchart of a hybrid vehicle control method provided in an embodiment of this application. Figure 2 As shown, the method in this application embodiment may include the following steps S101-S103.

[0029] S101, obtain the vehicle's operating parameters; In one embodiment, the vehicle's operating condition parameters are obtained. These parameters are state data of the vehicle during operation and are used to describe the vehicle's working state under different driving scenarios.

[0030] The operating parameters include at least the current engine coolant temperature. Coolant is a crucial fluid for ensuring the normal and proper operation of the engine. It circulates within the engine, absorbing the heat generated and keeping the engine operating within its normal temperature range, preventing overheating damage. Additionally, coolant contains special additives to prevent rust and corrosion of internal engine metal parts, extending the engine's lifespan. Engine coolant temperature is a significant factor in engine operation; excessively high or low temperatures can affect emissions levels. If the coolant temperature is too low, the engine operating temperature will also be low, resulting in incomplete fuel combustion. This leads to unburned fuel entering the exhaust system, and the catalytic converter's efficiency is lower at low engine temperatures. Catalytic converters need to reach a certain temperature to effectively convert harmful gases (such as nitrogen oxides NOx, hydrocarbons HC, and carbon monoxide CO) into harmless gases. This increases emissions (such as hydrocarbons HC and carbon monoxide CO). When the coolant temperature is too high, it usually indicates engine overheating, leading to the generation of multiple emissions, particularly NOx and PM.

[0031] Optionally, the operating parameters may also include one or more of the following parameters: engine power parameters (such as engine speed, engine output torque, vehicle speed, throttle opening, fuel injection quantity, intake air temperature and pressure), vehicle driving status parameters (such as acceleration, driving mode), engine output torque, drive motor output torque, vehicle required torque, power battery voltage and remaining power battery charge, etc.

[0032] S102, Based on the operating parameters, adjust the state of the vehicle's engine to reduce emissions; In one embodiment, the current operating status of the vehicle can be determined based on the acquired operating parameters, and the engine status can be adjusted to achieve the lowest or lowest emissions under the current operating conditions. The engine status refers to its operating state, which may include starting, no torque output, stopping, not starting, fuel injection prohibited, and outputting torque based on the vehicle's required torque, etc.

[0033] In one feasible implementation, if the engine is determined to be in a hot engine condition and a high power demand condition based on the operating parameters, the engine state is adjusted to not output torque or to operate in the economic range to avoid the engine increasing the amount of fuel injection to meet the vehicle's power demand under this condition, resulting in excessive emissions. When the engine state is not outputting torque, it means that the engine is idling or stopped. Preferably, to further reduce fuel consumption and emissions, the engine can be stopped when the engine state is not outputting torque.

[0034] In another feasible implementation, if the engine is determined to be in a hot engine condition and not in a high power demand condition based on the operating parameters, the engine combustion efficiency is low and incomplete combustion may occur. In this case, the engine state is adjusted to not output torque or to operate in the economic range to reduce the engine emissions at low speeds.

[0035] In another feasible implementation, if the engine is determined to be in a warm-up condition based on the operating parameters, the engine state is adjusted to output torque based on the torque required by the vehicle or to operate in the economic range. By controlling the engine operation, the engine coolant temperature (engine temperature) is increased so that the engine can quickly reach the normal operating state. Under the normal operating state, the engine's emissions are better than those under the warm-up condition.

[0036] In another feasible implementation, if the engine is determined to be in a cold start condition based on the operating parameters, since the engine generates more pollutants in the cold start state, the engine is adjusted to a non-start state or a non-injection state to avoid operating the engine in a low temperature state.

[0037] S103 controls the vehicle's drive motor based on adjustments to the engine's state.

[0038] In one embodiment, after adjusting the engine's state, the vehicle's drive motor is controlled according to that engine state. The engine and drive motor can work together to drive the vehicle, or one of them can drive the vehicle, depending on the engine's state and operating parameters.

[0039] In this embodiment of the application, the state of the vehicle's engine is adjusted by obtaining the vehicle's operating condition parameters, wherein the operating condition parameters include at least the engine coolant temperature, and the state of the vehicle's motor is adjusted accordingly based on the state of the engine, so as to make full use of the two power sources to achieve vehicle drive and reduce exhaust emissions under different operating conditions.

[0040] Please see Figure 3 This is a flowchart illustrating a hybrid vehicle control method provided in an embodiment of this specification. Figure 3 As shown, the method in the embodiments of this specification may include the following steps S201-S207.

[0041] S201, when it is determined that the engine is in a hot engine condition based on the engine coolant temperature, it is determined whether the engine is in a high power demand condition based on the engine's power parameters. In one embodiment, the operating parameters also include the engine's power parameters, the remaining charge of the power battery, and the vehicle's required torque. If the engine coolant temperature is greater than a first coolant temperature threshold, the engine is determined to be in a hot-engine condition. Being in a hot-engine condition indicates that the engine is currently in a relatively normal operating state. For example, the first coolant temperature threshold can be 30°C.

[0042] Engine power parameters include fuel injection quantity. Understandably, when the rate of increase in fuel injection quantity exceeds a first threshold, the engine is determined to be in a high-power-demand condition. This high-power-demand condition indicates that the engine currently needs to perform transient enrichment to increase the fuel injection quantity. This causes an increase in in-cylinder combustion temperature, generating a large amount of NOx, and simultaneously, the enrichment state increases the generation of particulate matter (PM). At this point, priority is given to switching the vehicle's power source to battery drive.

[0043] Optionally, the engine's power parameters may also include at least one of the following: vehicle speed and engine output torque. The vehicle controller can collect vehicle speed signals via CAN messages.

[0044] When the rate of increase of the vehicle's speed exceeds the second threshold, it indicates that the vehicle is currently in an acceleration state. In the acceleration state, if the rate of increase of the fuel injection quantity exceeds the first threshold at the same time, there is a need to increase fuel consumption to accelerate. At this time, the vehicle's emissions increase significantly, which is determined to be a high power demand condition.

[0045] When the engine output torque is greater than the third threshold, it indicates that the vehicle is under high load. If the rate of increase of fuel injection quantity is greater than the first threshold at the same time, the engine needs more fuel to maintain power output. Compared with the transient increase of fuel injection quantity under low load conditions, the increase in vehicle emissions is greater. Defining this situation as a high power demand condition allows for more accurate control of situations where emissions increase significantly.

[0046] Understandably, by acquiring vehicle speed and / or engine output torque, and combining it with fuel injection quantity, the determination of high power demand conditions for the engine can be made. Since multiple conditions are considered in determining high power demand conditions for the engine, it is possible to more accurately identify situations where there is a significant increase in transient emissions, and then control the engine state under such conditions to avoid a significant increase in emissions.

[0047] For example, the first threshold can be 2 mL / s², the second threshold can be 5 m / s², and the third threshold can be 1500 N·m.

[0048] S202, when the engine is under high power demand conditions, determine whether the remaining charge of the power battery is greater than a first charge threshold. If the remaining charge of the power battery is greater than the first charge threshold, determine whether the maximum output torque of the drive motor is less than the required torque of the vehicle. If the maximum output torque of the drive motor is not less than the required torque of the vehicle, adjust the engine state to not output torque. If the maximum output torque of the vehicle's drive motor is less than the required torque of the vehicle, adjust the engine state to operate in the economic range. If the remaining charge of the power battery is less than or equal to the first charge threshold, adjust the engine state to operate on the optimal operating curve or the external characteristic curve based on the required torque of the vehicle. In one embodiment, when the engine is under high power demand conditions, it is determined whether the remaining charge of the power battery is greater than a first charge threshold.

[0049] Specifically, if the remaining charge of the power battery is determined to be greater than a first charge threshold, it is then determined whether the drive motor can meet the vehicle's required torque. If the maximum output torque of the drive motor is determined to be greater than or equal to the vehicle's required torque, then the drive motor can meet the vehicle's driving needs. In this case, the engine does not output torque to avoid generating excessive emissions under this condition. In one feasible implementation, the vehicle's required torque is calculated based on the vehicle's acceleration. The first charge threshold can be set according to demand, for example, to 25% or 20%. If the maximum output torque of the vehicle's drive motor is determined to be less than the vehicle's required torque, then the engine needs to supplement power, adjusting the engine to operate in the economic range. Within this range, the engine can provide sufficient power output with minimal fuel consumption, thereby meeting the vehicle's torque requirements together with the drive motor while reducing emissions.

[0050] The economic range refers to the operating range within which an engine can achieve high fuel efficiency under certain load and speed conditions. The range of the economic range can be described by different operating conditions (such as vehicle speed, engine speed, and load). Generally, this range does not involve the engine's limits, but rather falls within the engine's low to medium load range. For most automotive engines, the economic range typically lies within the engine's medium speed range (e.g., 1500-2500 rpm) and under moderate load conditions.

[0051] Specifically, if the remaining charge of the power battery is determined to be less than or equal to a first charge threshold, and the drive motor cannot be used as the primary power source, then the engine's state will be adjusted to operate on either the optimal operating curve or the external characteristic curve based on the vehicle's required torque to meet the vehicle's driving needs. The specific choice depends on the relationship between the vehicle's required torque, the torque provided by the optimal operating curve, and the torque provided by the external characteristic curve.

[0052] The optimal operating curve is the line connecting the engine's optimal operating points. The optimal operating point is the point at which the engine achieves the highest efficiency (i.e., fuel efficiency) at a given engine speed. The optimal operating curve is a curve that characterizes the engine's best fuel efficiency under different speeds and loads (or torque, etc.). It is typically plotted with engine speed (RPM) on the x-axis and load (or torque, etc.) on the y-axis, showing the fuel efficiency curves at different operating points. A segment of the optimal operating curve usually lies within the economic range, indicating the operating point within that range where the engine achieves optimal fuel economy. In other words, the optimal fuel-efficient operating point (or the best operating point) within the economic range generally lies on the optimal operating curve.

[0053] When an engine is running, its three basic performance indicators—power, torque, and fuel consumption—change with the load. These changes follow certain patterns, and plotting these patterns as curves creates a graph reflecting the engine's characteristics. The engine external characteristic curve is a curve showing the engine's output power (torque) as a function of engine speed, measured when the engine throttle opening is 100%. From the external characteristic curve, you can see the engine's maximum output power, maximum torque, and their corresponding engine speeds and fuel consumption.

[0054] It should be noted that the economic range, optimal operating curve, and external characteristic curve are all calibrated by the engine before it leaves the factory.

[0055] Optionally, in one embodiment, adjusting the engine state to operate on the optimal operating curve or the external characteristic curve based on the vehicle's required torque includes the following steps S2021-S2022: S2021, when the required torque of the whole vehicle is less than or equal to the output torque of the engine when it is running on the optimal operating curve, the state of the engine is adjusted to run on the optimal operating curve. In one embodiment, when the required torque of the vehicle is less than or equal to the output torque of the engine when it is running on the optimal operating curve, it means that the output torque of the engine when it is running on the optimal operating curve can meet the driving needs of the vehicle. In this case, in order to ensure the best fuel efficiency and reduce emissions, the state of the engine is adjusted to run on the optimal operating curve.

[0056] S2022, when the required torque of the vehicle is greater than the output torque of the engine when it is operating on the optimal operating curve, the state of the engine is adjusted to operate on the external characteristic curve.

[0057] In one embodiment, when the required torque of the vehicle is greater than the output torque of the engine when it is running on the optimal operating curve, it means that the output torque of the optimal operating curve is too small to meet the driving needs of the vehicle. At this time, the remaining charge of the power battery is also less than or equal to the first charge threshold. Therefore, the state of the engine is adjusted to run on the external characteristic curve, so that the engine outputs the maximum torque within its available torque range.

[0058] S203, when the engine is not in a high power demand condition, determine whether the remaining charge of the power battery is greater than a first charge threshold. If the remaining charge of the power battery is greater than the first charge threshold, adjust the state of the engine to not output torque. If the remaining charge of the power battery is less than or equal to the first charge threshold, adjust the state of the engine to operate in the economic range.

[0059] In one embodiment, when the engine is not in a high-power-demand condition (e.g., low-power-demand condition such as low-speed vehicle driving), it is determined whether the remaining charge of the power battery is greater than a first charge threshold. If the remaining charge of the power battery is greater than the first charge threshold, the power battery supplies power to the drive motor, which drives the vehicle, and the engine is adjusted to not output torque. If the remaining charge of the power battery is less than or equal to the first charge threshold, indicating that the power battery is insufficient to supply the drive motor to drive the vehicle, the engine is adjusted to operate in the economic range.

[0060] S204, when the engine is adjusted to not output torque, if the total vehicle torque requirement is less than or equal to the maximum output torque of the first motor, the output torque of the first motor is controlled based on the total vehicle torque requirement; if the total vehicle torque requirement is greater than the maximum output torque of the first motor and less than or equal to the sum of the maximum output torque of the first motor and the maximum output torque of the second motor, the output torque of the first motor and the second motor is controlled based on the total vehicle torque requirement. In one embodiment, the drive motor includes a first motor and a second motor. After determining the engine's state, the drive motor can be controlled accordingly. When the engine is adjusted to not output torque, power needs to be provided by the drive motor. If the vehicle's required torque is less than or equal to the maximum output torque of the first motor, the output torque of the first motor is controlled based on the vehicle's required torque. If the vehicle's required torque is greater than the maximum output torque of the first motor but less than or equal to the sum of the maximum output torque of the first motor and the maximum output torque of the second motor, it indicates that the vehicle's required torque cannot be met by the first motor alone. In this case, both the first and second motors are controlled to output torque based on the vehicle's required torque.

[0061] It is understood that in other embodiments, the drive motor may include only one motor or a greater number of motors. Furthermore, the maximum torque provided by the first motor and the second motor may be the same or different. If they are different, after determining the engine state, the required torque for the entire vehicle can be compared sequentially with the maximum torque of the first and second motors to find the motor that can meet the required torque for the entire vehicle.

[0062] S205, when the engine is in a high power demand condition and the engine state is adjusted to operate in the economic range, if the total vehicle torque demand is greater than the engine output torque, then the output torque of the first motor and / or the second motor is controlled based on the difference between the total vehicle torque demand and the engine output torque. In one embodiment, when the engine is operating under high power demand conditions and within its economical operating range, and the engine's output torque cannot meet the vehicle's torque requirements, the output torque of the first motor and / or the second motor needs to be controlled based on the difference between the vehicle's required torque and the engine's output torque to supplement power. Specifically, if the difference is less than the output torque of the first motor, the first motor's output torque can be used; if the difference is greater than the first motor's output torque but less than or equal to the sum of the first and second motor's output torques, both the first and second motors' output torques can be used.

[0063] S206, when the engine is not in a high power demand condition and the engine is adjusted to operate in the economic range, if the output torque of the engine is greater than the required torque of the vehicle, then the charging torque is determined based on the output torque of the engine and the required torque of the vehicle, and the first motor and / or the second motor are controlled to charge the power battery based on the charging torque. In one embodiment, when the engine is not under high power demand and is operating within its economical range, if the engine's output torque exceeds the vehicle's required torque, the engine's power can be allocated to prioritize vehicle operation, with the remaining power used for charging. The charging torque is determined based on the engine's output torque and the vehicle's required torque; that is, how much torque the engine has left for charging beyond supplying the vehicle's required torque. This charging torque is used to charge the battery via the engine's drive motor. Controlling the drive motor can include controlling a first motor, a second motor, or both. The appropriate drive motor is selected based on the magnitude of the charging torque.

[0064] S207, when the engine is adjusted to operate on the optimal operating curve or the external characteristic curve, if the output torque of the engine is greater than the required torque of the vehicle, then the charging torque is determined based on the output torque of the engine and the required torque of the vehicle, and the first motor and / or the second motor are controlled to charge the power battery based on the charging torque.

[0065] In one embodiment, when the engine is adjusted to operate on its optimal operating curve or its external characteristic curve, if the engine's output torque is greater than the vehicle's required torque, the remaining engine torque can be used to drive the drive motor to charge the power battery. The charging torque is determined based on the engine's output torque and the vehicle's required torque, and the first and / or second motors are controlled to charge the power battery based on this charging torque.

[0066] Optionally, if it is detected that the battery's charge level is greater than or equal to a preset full-charge threshold after the engine has charged the battery, the vehicle will be controlled to be driven by the electric motor and the engine will be stopped. By setting the vehicle to use the battery for power only after the remaining charge level reaches the preset full-charge threshold, instead of immediately using the drive motor after the charge level exceeds the first threshold, frequent charging and discharging can be avoided, thus protecting the battery. The preset full-charge threshold can be set to 80% or 90%.

[0067] This specification provides an embodiment on how to determine whether an engine is in a hot-engine condition, and a method for controlling the engine and drive motor when the engine is in a hot-engine condition. After determining that the engine is in a hot-engine condition based on the engine coolant temperature, the engine's power parameters are further obtained to determine whether the engine is in a high-power-demand condition. When the engine is in a high-power-demand condition, the use of the engine for driving is reduced. If the remaining charge of the power battery is greater than a first charge threshold, and the maximum output torque of the drive motor is greater than the torque required by the vehicle, the engine is controlled to not output torque, and the first motor and / or the second motor are selected to drive the vehicle according to the torque required by the vehicle, thereby reducing emissions. If the maximum output torque of the drive motor is less than the torque required by the vehicle, the engine is controlled to operate in the economic range to provide supplementary power with optimal fuel consumption and emissions. If the output torque of the engine operating in the economic range cannot meet the torque required by the vehicle, the first motor and / or the second motor are controlled to drive the vehicle to supplement torque. If the remaining charge of the power battery is less than or equal to a first charge threshold, the vehicle can only be driven by the engine. In this case, the engine is controlled to operate on its optimal operating curve or its external characteristic curve based on the vehicle's required torque. If the engine's output torque is greater than the vehicle's required torque, the charging torque is determined based on the engine's output torque and the vehicle's required torque. The first motor and / or the second motor are then controlled to charge the power battery based on this charging torque. When the engine is not under high power demand conditions, the vehicle may be under low load, low speed, or other low power demand conditions. In this case, the engine state is determined based on the remaining charge of the power battery, and the vehicle's power source prioritizes the power battery for driving, reducing engine emissions when the vehicle is traveling at low speeds.

[0068] Please see Figure 4 This is a flowchart illustrating a hybrid vehicle control method provided in an embodiment of this specification. Figure 4 As shown, the method in the embodiments of this specification may include the following steps S301-S305.

[0069] S301, when the engine is in warm-up condition based on the engine coolant temperature, determine whether the remaining charge of the power battery is greater than the second charge threshold. In one embodiment, the operating parameters also include the remaining charge of the power battery and the required torque of the vehicle. If the engine coolant temperature is less than or equal to a first coolant temperature threshold and greater than a second coolant temperature threshold, the engine is determined to be in a warm-up state. The first coolant temperature threshold can be 30°C, and the second coolant temperature threshold can be 5°C or 10°C. At this time, it is determined whether the remaining charge of the power battery is greater than the second charge threshold. For example, the second charge threshold can be 80%. The second charge threshold is greater than the first charge threshold.

[0070] S302, if it is determined that the remaining charge of the power battery is greater than the second charge threshold, determine whether the required torque of the vehicle is less than or equal to the output torque of the engine when it is running in the economic range. If the required torque of the vehicle is less than or equal to the output torque of the engine when it is running in the economic range, then adjust the state of the engine to output torque based on the required torque of the vehicle; if the required torque of the vehicle is greater than the output torque of the engine when it is running in the economic range, then adjust the state of the engine to run in the economic range. In one embodiment, during warm-up, the engine is not in its optimal operating state, and the coolant temperature needs to be increased. Therefore, the engine needs to be operated to raise the temperature. If the remaining charge of the power battery is determined to be greater than a second charge threshold, it is determined whether the vehicle's required torque is less than or equal to the engine's output torque when operating in the economic range. If so, the engine's state is adjusted to output torque based on the vehicle's required torque, ensuring that the vehicle provides sufficient power while maintaining optimal fuel economy. Within the economic range, the engine's speed and output torque are closely related. Generally, the engine's torque output is relatively stable within the 1500-2500 RPM speed range, and lower speeds effectively reduce fuel consumption.

[0071] If the vehicle's required torque is greater than the engine's output torque when operating in its economic range, the engine will be adjusted to operate within that range. This ensures the engine can continue working to reach normal operating conditions as quickly as possible, while operating with optimal energy consumption and reducing emissions. Understandably, since the remaining charge of the power battery is greater than the second charge threshold, the portion of the torque not required by the vehicle can be met by the drive motor.

[0072] S303, if it is determined that the remaining power of the power battery is less than or equal to the second power threshold, the state of the engine is adjusted to operate on the external characteristic curve.

[0073] In one embodiment, if the remaining charge of the power battery is less than or equal to a second charge threshold, the engine needs to provide more power, that is, it cannot operate at its optimal level and needs to operate on the external characteristic curve.

[0074] S304, when the vehicle's engine is adjusted to operate in the economic range, the output torque of the drive motor is controlled based on the difference between the vehicle's required torque and the engine's output torque; In one embodiment, if the required torque of the vehicle is greater than the output torque of the engine when it is operating in the economic range, the engine state is adjusted to operate in the economic range. At this time, it is necessary to calculate the difference between the required torque of the vehicle and the output torque of the engine, so as to control the drive motor to output the difference torque to meet the required torque of the vehicle.

[0075] S305, when the engine is adjusted to operate on the external characteristic curve, if the engine output torque is greater than the vehicle's required torque, then the charging torque is determined based on the engine output torque and the vehicle's required torque, and the drive motor is controlled to charge the power battery based on the charging torque; if the engine output torque is less than or equal to the vehicle's required torque, then the drive motor output torque is controlled based on the difference between the vehicle's required torque and the engine output torque.

[0076] In one embodiment, when the remaining power battery capacity is determined to be less than or equal to a second power threshold, the engine is adjusted to operate on the external characteristic curve. If the output torque under the external characteristic curve is greater than the required torque of the vehicle, the remaining engine torque is used to charge the power battery. The charging torque is determined based on the engine output torque and the required torque of the vehicle. The engine output torque is controlled to supply the drive motor based on the charging torque, and the drive motor then converts its output mechanical power into electrical energy to charge the power battery. If the output torque under the external characteristic curve is less than or equal to the required torque of the vehicle, the drive motor output torque is controlled to supplement the required torque of the vehicle based on the difference between the required torque of the vehicle and the engine output torque. The output torque of the drive motor is equal to the difference between the required torque of the vehicle and the engine output torque.

[0077] Optionally, if it is detected that the battery's charge level is greater than or equal to a preset full-charge threshold after the engine has charged the battery, the vehicle will be controlled to be driven by the electric motor and the engine will be stopped. By setting the vehicle to use the battery for power only after the remaining charge level reaches the preset full-charge threshold, instead of immediately using the drive motor after the charge level exceeds the second threshold, frequent charging and discharging can be avoided, thus protecting the battery. The preset full-charge threshold can be set to 80% or 90%.

[0078] This specification provides embodiments of how to determine whether the engine is in a warm-up state, and a method for controlling the engine and drive motor when the engine is in a hot-up state. When the engine is determined to be in a warm-up state based on the engine coolant temperature, the engine operation is controlled based on the remaining charge of the power battery and the vehicle's required torque, allowing the engine coolant temperature to quickly reach normal operating temperature. When the power battery has sufficient remaining charge, the engine is prioritized to operate within its optimal fuel-efficient range. When the power battery has insufficient remaining charge, the engine is controlled to output torque beyond its external characteristic curve. By controlling the engine to operate only at the maximum output torque of the external characteristic curve, engine damage or increased emissions can be avoided. When the vehicle's required torque is greater than the engine's output torque within its economic range, and the engine is operating within its economic range, the drive motor's output torque is controlled based on the difference between the vehicle's required torque and the engine's output torque, supplementing power through the drive motor. When the engine is adjusted to operate within its external characteristic curve, if the output torque under the external characteristic curve is greater than the vehicle's required torque, the remaining engine torque is used to charge the battery; if the output torque under the external characteristic curve is less than or equal to the vehicle's required torque, the drive motor supplements torque. By rationally controlling the operation of the engine and drive motor during warm-up, the vehicle can ensure normal operation while achieving optimal emissions during warm-up.

[0079] Please see Figure 5 This is a flowchart illustrating a hybrid vehicle control method provided in an embodiment of this specification. Figure 5 As shown, the method in the embodiments of this specification may include the following steps S401-S406.

[0080] S401, when the engine is determined to be in a cold engine condition based on the engine coolant temperature, determine whether the remaining charge of the power battery is greater than a third charge threshold. In one embodiment, the operating parameters also include the remaining charge of the power battery. If the engine coolant temperature is lower than a second coolant temperature threshold, the engine is determined to be in a cold-start condition, and then it is determined whether the remaining charge of the power battery is greater than a third charge threshold. The second coolant temperature threshold can be 5%. It should be noted that the third charge threshold is lower than the second charge threshold, but the third charge threshold can be greater than or equal to the first charge threshold. Furthermore, since the current engine coolant temperature is low and the engine resistance is relatively high, to avoid the power battery remaining charge being too low and preventing the engine from starting, the third charge threshold is preferably greater than the first charge threshold. For example, the third charge threshold can be 30%.

[0081] S402, if it is determined that the remaining power of the power battery is greater than the third power threshold, the state of the engine is adjusted to be stopped or not started; In one embodiment, the amount of pollutants generated by the engine is relatively large during cold start. Therefore, when the remaining power of the power battery is greater than the third power threshold, the engine state is adjusted to be stopped or not started to avoid the engine operating under cold conditions.

[0082] S403, if it is determined that the remaining power of the power battery is less than or equal to the third power threshold, the state of the engine is adjusted to prohibit fuel injection and driven by the drive motor; In one embodiment, if the remaining charge of the power battery is less than or equal to a third charge threshold under cold engine conditions, the power battery cannot continuously supply power to the drive motor. The engine needs to be taken out of the cold engine condition as soon as possible, and then powered by the engine. The engine is adjusted to a state where fuel injection is prohibited to avoid pollutant emissions, and it is driven by the drive motor. This involves passively idling the engine, allowing the oil to flow and generating some heat through mechanical friction.

[0083] S404, the engine is preheated using the coolant from the power battery.

[0084] In one embodiment, when the engine is set to operate with fuel injection disabled and driven by the motor, the engine can be preheated using the battery coolant. Since the engine is cold, using it will produce more emissions, thus requiring a higher engine temperature. When the vehicle's battery is operating, the heat generated by the motor heats the coolant. This heated battery coolant flows into the engine cylinder liners, raising the temperature of components such as the engine oil. This process effectively improves the engine's cold-start performance at low temperatures, reduces wear during cold starts, and lowers emissions, thereby improving engine efficiency and environmental performance.

[0085] In one feasible implementation, the engine can be preheated using the coolant from the power battery and the coolant from the drive motor. The vehicle includes motor coolant lines, battery coolant lines, engine preheating lines, and an electronically controlled water valve; the electronically controlled water valve is located on the engine preheating lines. The electronically controlled water valve is opened to connect the motor coolant lines and battery coolant lines with the engine preheating lines. The motor coolant in the motor coolant lines and the power battery coolant in the battery coolant lines flow through the engine via the engine preheating lines, and the motor drives the engine for a preset time to increase the engine temperature.

[0086] Please see Figure 6 , Figure 6This specification provides a system diagram of a vehicle, including an electronically controlled water valve, a coolant temperature sensor, a vehicle controller, a power battery, a drive motor, and an engine. The drive motor has a corresponding motor coolant line 1, the power battery has a corresponding battery coolant line 2, and the engine has an engine preheating line 3. The coolant temperature sensor is located on the engine's coolant line. Optionally, the engine preheating line can be the same as the engine's coolant line. The vehicle controller can control the power battery, drive motor, electronically controlled water valve, and engine. When the engine is in a state where fuel injection is prohibited and it is driven by the drive motor, the vehicle controller can control the electronically controlled water valve to open, so that the motor coolant line 1 and motor coolant line 2 are connected to the engine preheating line 3 through the electronically controlled water valve, delivering motor coolant and drive motor coolant to the engine preheating line 3 to increase the engine temperature.

[0087] It should be noted that before opening the electronically controlled water valve, the temperature of the power battery coolant and the motor coolant can be detected. If the temperature of the power battery coolant and / or the motor coolant is higher than that of the engine coolant, the target coolant with a temperature higher than that of the engine coolant will be delivered to the engine preheating pipeline.

[0088] S405, when the engine is adjusted to be stopped or not started, the output torque of the drive motor is controlled based on the vehicle's required torque. In one embodiment, the operating parameters also include the vehicle's required torque. When the engine is stopped or not started, the drive motor needs to be controlled to output the vehicle's required torque to meet the vehicle's driving needs.

[0089] S406, when the engine is adjusted to a state where fuel injection is prohibited and the engine is driven by the drive motor, the towing torque is determined based on the engine's resistance, and the output torque of the drive motor is controlled based on the sum of the vehicle's required torque and the towing torque. In one embodiment, when the engine is configured to disable fuel injection and is driven by the drive motor, the motor drives the engine through its output torque, while the engine's own resistance (such as mechanical friction, aerodynamic drag, etc.) reacts on the motor. Generally, the engine's resistance torque can be obtained through experimental data; therefore, the motor's output drag torque must be greater than or equal to the engine's resistance torque to overcome all resistance and maintain engine movement. The drag torque is determined based on actual needs and the engine's resistance, and then the drive motor's output torque is controlled based on the sum of this drag torque and the vehicle's required torque.

[0090] Optionally, the hybrid vehicle control method in the embodiments of this specification may include the following steps, S501.

[0091] S501: After the vehicle controller receives a vehicle parking command, if the remaining charge of the power battery is less than a fourth charge threshold, the vehicle will begin parking charging of the power battery before shutting down the engine. Once the remaining charge of the power battery exceeds the fourth charge threshold, charging will stop and the vehicle will be turned off. This prevents the battery from completely losing power after parking or being damaged due to over-discharge, while ensuring basic functions such as the alarm system, door control, and lights remain operational after parking. For example, the fourth charge threshold can be 30%. It should be noted that this scheme of detecting the remaining charge of the power battery before parking can be implemented under any operating condition.

[0092] This specification provides an embodiment on how to determine the engine cold start condition and a scheme for controlling the engine and drive motor under cold start conditions. When the engine is determined to be in a cold start condition based on the engine coolant temperature, since engine contaminants are generated in greater quantities during cold starts, engine operation in a low-temperature state should be avoided. When the remaining charge of the power battery is greater than a third charge threshold, the engine is determined to be stopped or not started, and the engine is not used for driving. When the remaining charge of the power battery is less than or equal to the third charge threshold, the engine state is adjusted to prohibit fuel injection and driven by the drive motor. This allows the engine to agitate the oil and raise its temperature, so that the engine can be used to drive the vehicle after the engine coolant temperature rises. Under cold start conditions, if the engine is stopped or not started, the drive motor output torque is controlled based on the vehicle's required torque. When the engine state is prohibited from fuel injection and driven by the engine, the drive motor needs to provide the torque required for engine driving in addition to the required torque. The towing torque is determined based on the engine resistance, and then the drive motor output torque is controlled based on the vehicle's required torque and the towing torque to meet the vehicle's driving needs and engine rotation needs. In addition, the engine can be preheated by the temperature of the power battery coolant. After working for a period of time, the temperature of the power battery will rise, which will in turn raise the temperature of the power battery coolant. The power battery coolant is then delivered to the engine, and the engine is preheated by the temperature of the power battery coolant, thereby reducing engine exhaust emissions.

[0093] This specification also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the above-described functionality. Figures 2-6 The hybrid vehicle control method of the illustrated embodiment can be found in the following documentation for its specific execution process: Figures 2-6 The specific details of the illustrated embodiments will not be elaborated here.

[0094] Please refer to Figure 7This diagram illustrates the structure of a vehicle provided in an exemplary embodiment of this specification. The vehicle in this specification may include one or more components such as a processor 110, a memory 120, an input device 130, an output device 140, and a bus 150. The processor 110, memory 120, input device 130, and output device 140 may be connected via the bus 150.

[0095] Processor 110 may include one or more processing cores. Processor 110 connects to various parts of the vehicle via various interfaces and lines, and executes various functions of terminal 100 and processes data by running or executing instructions, programs, code sets, or instruction sets stored in memory 120, and by calling data stored in memory 120. Optionally, processor 110 may be implemented using at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). Processor 110 may integrate one or a combination of several of the following: Central Processing Unit (CPU), Graphics Processing Unit (GPU), and modem. The CPU primarily handles the operating system, user page, and applications; the GPU is responsible for rendering and drawing the displayed content; and the modem handles wireless communication. It is understood that the modem may also not be integrated into processor 110 and may be implemented separately using a communication chip.

[0096] The memory 120 may include random access memory (RAM) or read-only memory (ROM). Optionally, the memory 120 may include non-transitory computer-readable storage medium. The memory 120 may be used to store instructions, programs, code, code sets, or instruction sets. The memory 120 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for implementing at least one function (such as touch function, sound playback function, image playback function, etc.), instructions for implementing the various method embodiments described above, etc. The operating system may be the Android system, including systems deeply developed based on the Android system, the iOS system developed by Apple Inc., including systems deeply developed based on the iOS system, or other systems.

[0097] The memory 120 can be divided into operating system space and user space. The operating system runs in the operating system space, while native and third-party applications run in user space. To ensure that different third-party applications can achieve good running performance, the operating system allocates corresponding system resources for each application. However, different application scenarios within the same third-party application have different requirements for system resources. For example, in local resource loading scenarios, third-party applications have high requirements for disk read speed; in animation rendering scenarios, third-party applications have high requirements for GPU performance. Since the operating system and third-party applications are independent of each other, the operating system often cannot promptly perceive the current application scenario of a third-party application, resulting in the operating system's inability to adapt system resources accordingly.

[0098] In order for the operating system to distinguish the specific application scenarios of third-party applications, it is necessary to establish data communication between the third-party applications and the operating system. This would allow the operating system to obtain the current scenario information of the third-party applications at any time, and then perform targeted system resource adaptation based on the current scenario.

[0099] The input device 130 is used to receive input instructions or data, and includes, but is not limited to, a keyboard, mouse, camera, microphone, or touch device. The output device 140 is used to output instructions or data, and includes, but is not limited to, a display device and a speaker. In one example, the input device 130 and the output device 140 can be combined, and the input device 130 and the output device 140 can be a touch display screen.

[0100] The touch display screen can be designed as a full-screen, curved screen, or irregularly shaped screen. It can also be designed as a combination of a full-screen and a curved screen, or a combination of an irregularly shaped screen and a curved screen; however, this specification does not limit the specific design of the embodiments described herein.

[0101] In addition, those skilled in the art will understand that the vehicle structure shown in the above figures does not constitute a limitation on the vehicle. A vehicle may include more or fewer components than shown, or combine certain components, or have different component arrangements. For example, a vehicle may also include radio frequency circuits, input units, sensors, audio circuits, WiFi modules, power supplies, Bluetooth modules, etc., which will not be described in detail here.

[0102] exist Figure 7 In the vehicle shown, the processor 110 can be used to call computer applications stored in the memory 120 and specifically perform the following operations: Obtain the vehicle's operating parameters, including engine coolant temperature; The vehicle's engine state is adjusted based on the aforementioned operating parameters to reduce emissions; The vehicle's drive motor is controlled based on adjustments made to the engine's state.

[0103] In one embodiment, the operating parameters also include engine power parameters, remaining battery charge, and vehicle torque requirements. The engine power parameters include fuel injection quantity. When the processor 110 adjusts the state of the vehicle's engine based on the operating parameters, it specifically performs the following operations: When the engine is determined to be in a hot engine condition based on the engine coolant temperature, it is determined whether the engine is in a high power demand condition based on the engine's power parameters. When the engine is under high power demand conditions, it is determined whether the remaining charge of the power battery is greater than a first charge threshold. If the remaining charge of the power battery is greater than the first charge threshold, it is determined whether the maximum output torque of the drive motor is less than the required torque of the vehicle. If the maximum output torque of the drive motor is not less than the required torque of the vehicle, the engine is adjusted to not output torque. If the maximum output torque of the drive motor is less than the required torque of the vehicle, the engine is adjusted to operate in the economic range. If the remaining charge of the power battery is less than or equal to the first charge threshold, the engine is adjusted to operate on the optimal operating curve or the external characteristic curve based on the required torque of the vehicle. When the engine is not under high power demand conditions, it is determined whether the remaining charge of the power battery is greater than a first charge threshold. If the remaining charge of the power battery is greater than the first charge threshold, the engine is adjusted to not output torque. If the remaining charge of the power battery is less than or equal to the first charge threshold, the engine is adjusted to operate in the economic range.

[0104] In one embodiment, the drive motor includes a first motor and a second motor. The processor 110 controls the vehicle's drive motor by performing adjustments based on the state of the engine, specifically by performing the following operations: When the engine is adjusted to not output torque, if the total vehicle torque requirement is less than or equal to the maximum output torque of the first motor, the output torque of the first motor is controlled based on the total vehicle torque requirement; if the total vehicle torque requirement is greater than the maximum output torque of the first motor and less than or equal to the sum of the maximum output torque of the first motor and the maximum output torque of the second motor, the output torque of the first motor and the second motor is controlled based on the total vehicle torque requirement. When the engine is in a high power demand condition and the engine is adjusted to operate in the economic range, if the total vehicle torque demand is greater than the engine output torque, the output torque of the first motor and / or the second motor is controlled based on the difference between the total vehicle torque demand and the engine output torque. When the engine is not under high power demand conditions and the engine is adjusted to operate in the economic range, if the output torque of the engine is greater than the required torque of the vehicle, the charging torque is determined based on the output torque of the engine and the required torque of the vehicle, and the first motor and / or the second motor are controlled to charge the power battery based on the charging torque. When the engine is adjusted to operate on the optimal operating curve or the external characteristic curve, if the output torque of the engine is greater than the required torque of the vehicle, the charging torque is determined based on the output torque of the engine and the required torque of the vehicle, and the first motor and / or the second motor are controlled to charge the power battery based on the charging torque.

[0105] In one embodiment, when the processor 110 adjusts the engine's state to operate on the optimal operating curve or the external characteristic curve based on the vehicle's required torque, it may specifically perform the following operations: When the required torque of the vehicle is less than or equal to the output torque of the engine when it is operating on the optimal operating curve, the state of the engine is adjusted to operate on the optimal operating curve. When the required torque of the vehicle is greater than the output torque of the engine when it is operating on the optimal operating curve, the state of the engine is adjusted to operate on the external characteristic curve.

[0106] In one embodiment, the operating parameters also include the remaining charge of the power battery and the required torque of the vehicle. When the processor 110 adjusts the state of the vehicle's engine based on the operating parameters, it specifically performs the following operations: When the engine is in warm-up condition based on the engine coolant temperature, determine whether the remaining charge of the power battery is greater than the second charge threshold. If the remaining charge of the power battery is greater than a second charge threshold, it is determined whether the required torque of the vehicle is less than or equal to the output torque of the engine when it is operating in the economic range. If the required torque of the vehicle is less than or equal to the output torque of the engine when it is operating in the economic range, the state of the engine is adjusted to output torque based on the required torque of the vehicle; if the required torque of the vehicle is greater than the output torque of the engine when it is operating in the economic range, the state of the engine is adjusted to operate in the economic range. If the remaining charge of the power battery is determined to be less than or equal to the second charge threshold, the state of the engine is adjusted to operate on the external characteristic curve.

[0107] In one embodiment, when processor 110 performs adjustments based on the state of the engine to control the vehicle's drive motor, it specifically performs the following operations: When the vehicle's engine is adjusted to operate in the economic range, the output torque of the drive motor is controlled based on the difference between the vehicle's required torque and the engine's output torque. When the engine is adjusted to operate on the external characteristic curve, if the engine's output torque is greater than the vehicle's required torque, the charging torque is determined based on the engine's output torque and the vehicle's required torque, and the drive motor is controlled to charge the power battery based on the charging torque; if the engine's output torque is less than or equal to the vehicle's required torque, the drive motor's output torque is controlled based on the difference between the vehicle's required torque and the engine's output torque.

[0108] In one embodiment, the operating condition parameters also include the remaining charge of the power battery. When the processor 110 adjusts the state of the vehicle's engine based on the operating condition parameters, it specifically performs the following operations: When the engine is in a cold engine condition based on the engine coolant temperature, determine whether the remaining charge of the power battery is greater than a third charge threshold. If it is determined that the remaining charge of the power battery is greater than the third charge threshold, the state of the engine is adjusted to be stopped or not started; If it is determined that the remaining charge of the power battery is less than or equal to the third charge threshold, the state of the engine is adjusted to prohibit fuel injection and driven by the drive motor.

[0109] In one embodiment, the operating parameters also include the vehicle's required torque. When the processor 110 performs adjustments based on the engine's state to control the vehicle's drive motor, it specifically performs the following operations: When the engine is switched to a stopped or non-started state, the output torque of the drive motor is controlled based on the vehicle's required torque. When the engine is adjusted to a state where fuel injection is prohibited and the engine is driven by the drive motor, the towing torque is determined based on the engine's resistance, and the output torque of the drive motor is controlled based on the sum of the vehicle's required torque and the towing torque. When the engine is adjusted to a state where fuel injection is prohibited and the engine is driven by the drive motor, the method further includes: The engine is preheated using the coolant from the power battery.

[0110] In the embodiments of this specification, the state of the vehicle's engine is adjusted by obtaining the vehicle's operating condition parameters, wherein the operating condition parameters include at least the engine coolant temperature, and the state of the vehicle's motor is adjusted accordingly based on the engine's state, making full use of the two power sources to drive the vehicle, so that the engine can reduce exhaust emissions under different operating conditions.

[0111] Furthermore, the document provides a method for determining whether the engine is in a hot-engine condition, and a control method for the engine and drive motor when the engine is in a hot-engine condition. After determining that the engine is in a hot-engine condition based on the engine coolant temperature, the document further obtains the engine's power parameters to determine whether the engine is in a high-power-demand condition. When the engine is in a high-power-demand condition, the use of the engine for driving is reduced. If the remaining charge of the power battery is greater than a first charge threshold, and the maximum output torque of the drive motor is greater than the torque required by the vehicle, the engine is controlled to not output torque, and the first motor and / or the second motor are selected to drive the vehicle according to the torque required by the vehicle, thereby reducing emissions. If the maximum output torque of the drive motor is less than the torque required by the vehicle, the engine is controlled to operate in the economic range to provide supplementary power with optimal fuel consumption and emissions. If the output torque of the engine operating in the economic range cannot meet the torque required by the vehicle, the first motor and / or the second motor are controlled to drive the vehicle to supplement torque. If the remaining charge of the power battery is less than or equal to a first charge threshold, the vehicle can only be driven by the engine. In this case, the engine is controlled to operate on its optimal operating curve or its external characteristic curve based on the vehicle's required torque. If the engine's output torque is greater than the vehicle's required torque, the charging torque is determined based on the engine's output torque and the vehicle's required torque. The first motor and / or the second motor are then controlled to charge the power battery based on this charging torque. When the engine is not under high power demand conditions, the vehicle may be under low load or idling. The engine state is determined based on the remaining charge of the power battery, and the vehicle's power source prioritizes the power battery for driving, reducing emissions from the engine at low speeds.

[0112] Furthermore, the document provides methods for determining whether the engine is in warm-up mode and for controlling the engine and drive motor when the engine is in warm-up mode. When the engine is determined to be in warm-up mode based on the engine coolant temperature, engine operation is controlled based on the remaining charge of the power battery and the vehicle's required torque, allowing the engine coolant temperature to quickly reach normal operating temperature. When the power battery has sufficient remaining charge, the engine is prioritized to operate within its optimal fuel-efficient range. When the power battery has insufficient charge, the engine's output is controlled according to its external characteristic curve. By controlling the engine to operate only at its maximum output torque according to the external characteristic curve, engine damage or increased emissions can be avoided. When the vehicle's required torque is greater than the engine's output torque in its optimal range, and the engine is operating within its optimal range, the drive motor's output torque is controlled based on the difference between the vehicle's required torque and the engine's output torque, supplementing power through the drive motor. When the engine is adjusted to operate within its external characteristic curve, if the output torque under the external characteristic curve is greater than the vehicle's required torque, the remaining engine torque is used to charge the battery; if the output torque under the external characteristic curve is less than or equal to the vehicle's required torque, the drive motor supplements torque. By rationally controlling the operation of the engine and drive motor during warm-up, the vehicle can ensure normal operation while achieving optimal emissions during warm-up.

[0113] Furthermore, the document provides a method for determining engine cold start conditions and a control scheme for the engine and drive motor under these conditions. When the engine is determined to be in cold start condition based on the engine coolant temperature, the engine should be kept away from low-temperature operation due to the higher amount of pollutants generated during cold starts. When the remaining battery charge is greater than a third charge threshold, the engine is determined to be stopped or not started, and is not used for driving. When the remaining battery charge is less than or equal to the third charge threshold, the engine is adjusted to a state where fuel injection is prohibited and the engine is driven by the drive motor. This allows the engine to agitate the oil and raise its temperature, preparing it for use once the engine coolant temperature rises. In cold start conditions, if the engine is stopped or not started, the drive motor output torque is controlled based on the vehicle's required torque. When the engine is in a state where fuel injection is prohibited and the engine is driven, the drive motor must provide the torque required for engine driving in addition to the required torque. The towing torque is determined based on engine resistance, and then the drive motor output torque is controlled based on the vehicle's required torque and the towing torque to meet both vehicle driving and engine rotation needs. In addition, the engine can be preheated by the temperature of the power battery coolant. After working for a period of time, the temperature of the power battery will rise, which will in turn raise the temperature of the power battery coolant. The power battery coolant is then delivered to the engine, and the engine is preheated by the temperature of the power battery coolant, thereby reducing engine exhaust emissions.

[0114] Additionally, embodiments of this specification provide a computer program product, which includes a computer program that, when executed by a vehicle's processor, enables the processor to at least perform the functions described above. Figures 2 to 6 The hybrid vehicle control method provided in the illustrated embodiment.

[0115] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The aforementioned program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. The aforementioned storage medium can be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.

[0116] The above-disclosed embodiments are merely preferred embodiments of this specification and should not be construed as limiting the scope of this specification. Therefore, any equivalent variations made in accordance with the claims of this specification shall still fall within the scope of this specification.

Claims

1. A hybrid vehicle control method, characterized in that, The method includes: Obtain the vehicle's operating parameters, including engine coolant temperature; The vehicle's engine state is adjusted based on the aforementioned operating parameters to reduce emissions; The vehicle's drive motor is controlled based on adjustments made to the engine's state.

2. The method according to claim 1, characterized in that, The operating parameters also include engine power parameters, remaining battery charge, and vehicle torque requirements. The engine power parameters include fuel injection quantity. Adjusting the vehicle's engine state based on the operating parameters includes: When the engine is determined to be in a hot engine condition based on the engine coolant temperature, it is determined whether the engine is in a high power demand condition based on the engine's power parameters. When the engine is under high power demand conditions, it is determined whether the remaining charge of the power battery is greater than a first charge threshold. If the remaining charge of the power battery is greater than the first charge threshold, it is determined whether the maximum output torque of the drive motor is less than the required torque of the vehicle. If the maximum output torque of the drive motor is not less than the required torque of the vehicle, the engine is adjusted to not output torque. If the maximum output torque of the drive motor is less than the required torque of the vehicle, the engine is adjusted to operate in the economic range. If the remaining charge of the power battery is less than or equal to the first charge threshold, the engine is adjusted to operate on the optimal operating curve or the external characteristic curve based on the required torque of the vehicle. When the engine is not under high power demand conditions, it is determined whether the remaining charge of the power battery is greater than a first charge threshold. If the remaining charge of the power battery is greater than the first charge threshold, the engine is adjusted to not output torque. If the remaining charge of the power battery is less than or equal to the first charge threshold, the engine is adjusted to operate in the economic range.

3. The method according to claim 2, characterized in that, The drive motor includes a first motor and a second motor, and the control of the vehicle's drive motor based on the adjustment of the engine's state includes: When the engine is adjusted to not output torque, if the total vehicle torque requirement is less than or equal to the maximum output torque of the first motor, the output torque of the first motor is controlled based on the total vehicle torque requirement; if the total vehicle torque requirement is greater than the maximum output torque of the first motor and less than or equal to the sum of the maximum output torque of the first motor and the maximum output torque of the second motor, the output torque of the first motor and the second motor is controlled based on the total vehicle torque requirement. When the engine is in a high power demand condition and the engine is adjusted to operate in the economic range, if the total vehicle torque demand is greater than the engine output torque, the output torque of the first motor and / or the second motor is controlled based on the difference between the total vehicle torque demand and the engine output torque. When the engine is not under high power demand conditions and the engine is adjusted to operate in the economic range, if the output torque of the engine is greater than the required torque of the vehicle, the charging torque is determined based on the output torque of the engine and the required torque of the vehicle, and the first motor and / or the second motor are controlled to charge the power battery based on the charging torque. When the engine is adjusted to operate on the optimal operating curve or the external characteristic curve, if the output torque of the engine is greater than the required torque of the vehicle, the charging torque is determined based on the output torque of the engine and the required torque of the vehicle, and the first motor and / or the second motor are controlled to charge the power battery based on the charging torque.

4. The method according to claim 2, characterized in that, The step of adjusting the engine's state to operate on the optimal operating curve or the external characteristic curve based on the vehicle's required torque includes: When the required torque of the vehicle is less than or equal to the output torque of the engine when it is operating on the optimal operating curve, the state of the engine is adjusted to operate on the optimal operating curve. When the required torque of the vehicle is greater than the output torque of the engine when it is operating on the optimal operating curve, the state of the engine is adjusted to operate on the external characteristic curve.

5. The method according to claim 1, characterized in that, The operating parameters also include the remaining charge of the power battery and the required torque of the vehicle. Adjusting the state of the vehicle's engine based on these operating parameters includes: When the engine is in warm-up condition based on the engine coolant temperature, determine whether the remaining charge of the power battery is greater than the second charge threshold. If the remaining charge of the power battery is greater than a second charge threshold, it is determined whether the required torque of the vehicle is less than or equal to the output torque of the engine when it is operating in the economic range. If the required torque of the vehicle is less than or equal to the output torque of the engine when it is operating in the economic range, the state of the engine is adjusted to output torque based on the required torque of the vehicle; if the required torque of the vehicle is greater than the output torque of the engine when it is operating in the economic range, the state of the engine is adjusted to operate in the economic range. If the remaining charge of the power battery is determined to be less than or equal to the second charge threshold, the state of the engine is adjusted to operate on the external characteristic curve.

6. The method according to claim 5, characterized in that, The method of controlling the vehicle's drive motor based on the state of the engine includes: When the vehicle's engine is adjusted to operate in the economic range, the output torque of the drive motor is controlled based on the difference between the vehicle's required torque and the engine's output torque. When the engine is adjusted to operate on the external characteristic curve, if the engine's output torque is greater than the vehicle's required torque, the charging torque is determined based on the engine's output torque and the vehicle's required torque, and the drive motor is controlled to charge the power battery based on the charging torque; if the engine's output torque is less than or equal to the vehicle's required torque, the drive motor's output torque is controlled based on the difference between the vehicle's required torque and the engine's output torque.

7. The method according to claim 1, characterized in that, The operating condition parameters also include the remaining charge of the power battery, and adjusting the state of the vehicle's engine based on the operating condition parameters includes: When the engine is in a cold engine condition based on the engine coolant temperature, determine whether the remaining charge of the power battery is greater than a third charge threshold. If it is determined that the remaining charge of the power battery is greater than the third charge threshold, the state of the engine is adjusted to be stopped or not started; If it is determined that the remaining charge of the power battery is less than or equal to the third charge threshold, the state of the engine is adjusted to prohibit fuel injection and driven by the drive motor.

8. The method according to claim 7, characterized in that, The operating parameters also include the vehicle's required torque, and the adjustment of the vehicle's drive motor based on the engine's state includes: When the engine is switched to a stopped or non-started state, the output torque of the drive motor is controlled based on the vehicle's required torque. When the engine is adjusted to a state where fuel injection is prohibited and the engine is driven by the drive motor, the towing torque is determined based on the engine's resistance, and the output torque of the drive motor is controlled based on the sum of the vehicle's required torque and the towing torque. When the engine is adjusted to a state where fuel injection is prohibited and the engine is driven by the drive motor, the method further includes: The engine is preheated using the coolant from the power battery.

9. A vehicle, characterized in that, The vehicles include: Memory, used to store executable program code; A processor for calling and running the executable program code from the memory, causing the vehicle to perform the method as described in any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer program code that, when executed, implements the method as described in any one of claims 1 to 8.

Images