Vehicle control method and device and vehicle

Abstract

The invention relates to the technical field of automobiles, and discloses a vehicle control method and device and a vehicle, the method is applied to a hybrid power vehicle, the hybrid power vehicle comprises a supercharger, and the method comprises the steps that when a target vehicle is in a direct drive mode or a parallel drive mode, the supercharger is started; acquiring a required power decline value of the target vehicle in a future time period and / or an accelerator pedal opening decline value in a preset time period; determining that the target vehicle meets the pressure adjustment condition; and the throttle opening degree of the target vehicle is increased to the preset opening degree value, and power transmission between an engine and wheels is cut off. According to the technical scheme, when the power requirement of the automobile is reduced, on the premise that blades of the supercharger are not damaged, high-pressure gas between the supercharger and the throttle valve in the automobile can be exhausted only by disconnecting power transmission between an engine and wheels and adjusting the opening degree of the throttle valve, so that a pressure release valve structure is omitted, and the complexity of a whole automobile system and the cost of the whole automobile are reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle control, and in particular to a vehicle control method, device and vehicle. Background Art

[0002] Conventional technology uses throttle opening to control intake air volume, and thus engine power output. When the vehicle's power demand is high, the throttle opening is wide, resulting in a high intake air volume and higher engine torque output. When the vehicle's power demand is low, the throttle opening is reduced to reduce intake air volume, thereby reducing engine torque output.

[0003] For supercharged engines, when the power demand of the car decreases, the throttle opening decreases rapidly in a short period of time, which will cause the gas pressure from the back of the supercharger to the front of the throttle to surge.

[0004] Existing vehicles use a pressure relief valve structure to solve the above-mentioned pressure surge problem. When the gas pressure between the supercharger and the throttle increases sharply, the pressure relief valve is opened to quickly release the gas pressure between the supercharger and the throttle, thereby preventing damage to the supercharger blades caused by backflow of air.

[0005] However, installing a pressure relief valve will make the vehicle's system more complicated, which will lead to higher maintenance costs and vehicle costs. Summary of the Invention

[0006] In view of the above problems, the present disclosure provides a vehicle control method, device and vehicle that overcome the above problems or at least partially solve the above problems. The technical solutions are as follows:

[0007] A vehicle control method, applied to a hybrid vehicle, the hybrid vehicle including a supercharger, the method comprising: when a target vehicle is in a direct drive mode or a parallel drive mode, obtaining a required power reduction value of the target vehicle in a future time period and / or an accelerator pedal opening reduction value in a preset time period; determining that the target vehicle satisfies a pressure adjustment condition based on the required power reduction value in the future time period and / or the accelerator pedal opening reduction value in the preset time period; increasing the throttle opening of the target vehicle to a preset opening value, and disconnecting power transmission between the engine and the wheels.

[0008] For supercharged engines, when the power demand of the vehicle decreases, the high-pressure gas between the supercharger and the throttle in the vehicle can be discharged simply by disconnecting the power transmission between the engine and the wheels and adjusting the throttle opening without damaging the supercharger blades, thereby eliminating the pressure relief valve structure and reducing the complexity of the entire vehicle system and the cost of the entire vehicle.

[0009] Optionally, obtaining the required power reduction value of the target vehicle in a future time period and / or the accelerator pedal opening reduction value in a preset time period specifically includes: obtaining a current driving mode of the target vehicle, the current driving mode including at least one of a first driving mode and a second driving mode; based on the current driving mode, obtaining the required power reduction value of the target vehicle in a future time period and / or the accelerator pedal opening reduction value in a preset time period.

[0010] By obtaining the current driving mode of the target vehicle and selecting data that is easier to obtain when obtaining the required power reduction value or the accelerator pedal opening reduction value based on the current driving mode, the data acquisition speed is improved, and it is ensured that whether the pressure adjustment conditions are met can be judged in different driving modes. This makes the vehicle control method of the present application applicable to more vehicle models and driving modes, and improves the universality of the method.

[0011] Optionally, based on the current driving mode, obtaining the required power reduction value of the target vehicle in a future time period and / or the accelerator pedal opening reduction value in a preset time period specifically includes: when the target vehicle is in the first driving mode, obtaining the driving environment data of the target vehicle and the current speed of the target vehicle; based on the driving environment data and the current speed, determining the speed change prediction value of the target vehicle in the future time period; based on the speed change prediction value, determining the required power reduction value of the target vehicle in the future time period.

[0012] When the current driving mode is assisted driving mode, the accelerator pedal opening remains at zero because the driver has not stepped on the accelerator pedal. If a vehicle in front changes lanes, and the target vehicle needs to slow down to avoid it, the throttle opening may decrease, resulting in high-pressure gas generated in front of the throttle behind the supercharger, which in turn damages the supercharger blades. At this time, the present application determines the predicted value of the vehicle speed change in the future time period based on the current driving environment and current speed of the target vehicle, thereby determining the target vehicle's required power reduction value under the premise that the accelerator pedal opening remains unchanged during the assisted driving process, and then determines whether the target vehicle needs to be pressure controlled based on the required power reduction value.

[0013] Optionally, based on the current driving mode, obtaining the required power reduction value of the target vehicle in a future time period and / or the accelerator pedal opening reduction value in a preset time period specifically includes: when the target vehicle is in the second driving mode, obtaining the accelerator pedal opening reduction value of the target vehicle in the preset time period.

[0014] When the vehicle is not in assisted driving mode, the accelerator pedal opening of the target vehicle can be directly monitored to obtain the accelerator pedal opening decrease value of the vehicle within a preset time period, which reduces the difficulty of data acquisition and improves the judgment speed when determining whether the pressure adjustment conditions are met.

[0015] Optionally, the determination that the target vehicle meets the pressure adjustment condition is based on the required power drop value in the future time period and / or the accelerator pedal opening drop value in the preset time period, specifically including: if the required power drop value in the future time period is greater than a first threshold and / or the accelerator pedal opening drop value is greater than a second threshold, and the current speed of the target vehicle is higher than the preset speed threshold, then the target vehicle meets the pressure adjustment condition.

[0016] If the target vehicle's power demand drops significantly within a short period of time, or the accelerator pedal opening decreases too much, the target vehicle's throttle opening decreases much faster than the supercharger's power reduction rate. This can easily lead to the generation of high-pressure gas behind the supercharger and before the throttle, potentially damaging the supercharger blades. By monitoring the target vehicle's accelerator pedal opening and power demand in real time, the risk of high-pressure gas generation can be quickly determined, allowing timely implementation of pressure adjustment strategies to prevent damage to the supercharger blades.

[0017] Optionally, after increasing the throttle opening of the target vehicle to a preset opening value and disconnecting the power transmission between the engine and the wheels, the method further includes: connecting the engine to the generator of the target vehicle; and determining the engine parameters after disconnecting the power transmission between the engine and the wheels based on the current remaining power of the target vehicle.

[0018] When adjusting the gas pressure before the throttle valve after the supercharger, the power transmission between the engine and the wheels needs to be disconnected, which will cause a decrease in the engine speed. Based on this, this solution connects the engine to the generator. It can utilize the remaining engine speed when the power between the engine and the wheels is disconnected, and charge the generator to recover energy, thereby preventing resource waste.

[0019] Optionally, the engine parameters after disconnecting the power transmission between the engine and the wheels are determined based on the current remaining power of the target vehicle, specifically including: if the current remaining power of the target vehicle is lower than a preset power threshold, keeping the engine connected to the generator; based on the charging power demand corresponding to the current remaining power, determining the output torque of the engine after disconnecting the power transmission between the engine and the wheels.

[0020] After disconnecting the power transmission between the engine and the wheels and switching the drive mode, the drive motor now provides power to the wheels. By obtaining the current remaining power of the target vehicle, it is determined whether it is necessary to connect the engine to the generator so that the engine can drive the generator to generate electricity, thereby ensuring that the battery of the target vehicle has sufficient power during subsequent driving.

[0021] Optionally, the engine parameters after disconnecting the power transmission between the engine and the wheels are determined based on the current remaining power of the target vehicle, specifically including: if the current remaining power of the target vehicle is not lower than a preset power threshold, disconnecting the engine from the generator; reducing the engine speed from the current speed to a first preset speed within a first preset time period; reducing the engine speed from the first preset speed to a second preset speed within a second preset time period after the first preset time period; reducing the engine speed from the second preset speed to a third preset speed within a third preset time period after the second preset time period; the rate of decrease of the engine speed within the second preset time period is lower than the rate of decrease of the engine speed within the first preset time period and the third preset time period.

[0022] When the remaining power of the target vehicle is high, the connection between the engine and the generator is disconnected, and the engine speed is controlled to decrease. At the same time, the speed of decrease of the engine speed is reduced within a second preset time during the descent process to prevent abnormal noise and shaking of the vehicle caused by the engine speed decreasing too quickly, thereby improving the user's driving experience.

[0023] Optionally, the adjusting of the engine speed specifically includes: predicting the reconnection time point when the engine and the wheels resume power connection, and the expected output torque corresponding to the reconnection time point based on the current driving data; determining the time difference between the current time point and the reconnection time point; if the time difference is higher than a preset time threshold, reducing the engine speed to a preset speed; if the time difference is lower than a preset time threshold, adjusting the engine speed to the engine speed corresponding to the expected output torque before the reconnection time point.

[0024] After cutting off the power transmission between the engine and the wheels, the engine can subsequently decide whether to continue connecting to the generator based on the target vehicle's current remaining power. Simultaneously, during the process of cutting off the power transmission between the engine and the wheels, the engine speed is adjusted in advance based on the subsequent expected engine output torque to ensure that the engine speed does not drop excessively during the process of cutting off the power transmission between the engine and the wheels, resulting in the need to quickly increase the engine speed to charge the generator or re-supply drive power to the wheels, thereby avoiding the user's driving experience being affected by the rapid increase in engine speed.

[0025] Optionally, before increasing the throttle opening of the target vehicle to a preset opening value, the method further includes: determining a pressure value between the supercharger and the throttle by a boost pressure sensor disposed between the supercharger and the throttle; and correcting the preset opening value based on the pressure value.

[0026] During the implementation of the pressure adjustment strategy, this application controls the throttle opening in real time based on the gas pressure between the supercharger and the throttle. This ensures that the gas pressure between the supercharger and the throttle can be smoothly adjusted after the high-pressure gas is generated, preventing damage to the supercharger blades. Furthermore, compared to directly adjusting the throttle opening to the maximum value, precise throttle opening control allows the throttle opening to be quickly adjusted to the ideal position after the engine resumes power transmission to the wheels, avoiding energy waste caused by excessive throttle opening.

[0027] Optionally, after the power transmission between the engine and the wheels is disconnected, the method further includes: determining the actual torque output value of the engine based on the required power reduction value of the target vehicle in a future time period and / or the accelerator pedal opening reduction value in a preset time period; determining the drive motor control parameters after the power transmission between the engine and the wheels is disconnected based on the actual torque output value of the engine; and controlling the operation of the target vehicle based on the drive motor control parameters.

[0028] After the power transmission between the engine and the wheels is cut off, this application will drive the wheels through the drive motor. At this time, by determining the actual output torque of the original engine, the drive motor parameters after the power transmission between the engine and the wheels is cut off are determined in advance, which can ensure the user's driving experience during driving and prevent the vehicle from stalling, accelerator pedal failure, etc. during the process of cutting off the power transmission between the engine and the wheels.

[0029] The present application also provides a vehicle control device, characterized in that it is applied to a hybrid vehicle, the hybrid vehicle includes a supercharger, and the device includes: a data acquisition module, when the target vehicle is in direct drive mode or parallel drive mode, obtains the required power reduction value of the target vehicle in a future time period and / or the accelerator pedal opening reduction value in a preset time period; a condition judgment module, based on the required power reduction value in the future time period and / or the accelerator pedal opening reduction value in the preset time period, determines that the target vehicle meets the pressure adjustment condition; a vehicle control module, increases the throttle opening of the target vehicle to a preset opening value, and disconnects the power transmission between the engine and the wheels.

[0030] The present application further provides a hybrid vehicle, comprising: a supercharger, at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform:

[0031] When the target vehicle is in direct drive mode or parallel drive mode, the required power reduction value of the target vehicle in a future time period and / or the accelerator pedal opening reduction value in a preset time period are obtained; based on the required power reduction value in the future time period and / or the accelerator pedal opening reduction value in the preset time period, it is determined that the target vehicle meets the pressure adjustment condition; the throttle opening of the target vehicle is increased to the preset opening value, and the power transmission between the engine and the wheels is disconnected.

[0032] By means of the above technical solution, the present disclosure provides a vehicle control method, device, and vehicle, wherein the vehicle control method is applied to a hybrid vehicle. For a supercharged engine, when the power demand of the vehicle decreases, the high-pressure gas between the supercharger and the throttle in the vehicle can be discharged without damaging the supercharger blades by simply disconnecting the power transmission between the engine and the wheels and adjusting the throttle opening, thereby eliminating the pressure relief valve structure and reducing the complexity of the entire vehicle system and the cost of the entire vehicle.

[0033] The above description is only an overview of the technical solution of the present disclosure. In order to more clearly understand the technical means of the present disclosure, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific implementation methods of the present disclosure are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present disclosure. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0035] Figure 1 This is a flow chart of a vehicle control method according to an embodiment of the present application;

[0036] Figure 2 This is a schematic structural diagram of a vehicle control system in an embodiment of the present application;

[0037] Figure 3 This is a schematic structural diagram of a vehicle control device in an embodiment of the present application;

[0038] Figure 4 This is a structural diagram of a vehicle in an embodiment of the present application. DETAILED DESCRIPTION

[0039] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0040] In existing technology, gasoline engines in automobiles control the amount of air intake, and thus the engine's power output, by controlling the throttle opening. When the vehicle's power demand is high, the throttle opening is wide, resulting in a high intake volume and higher engine torque. When the vehicle's power demand is low, the throttle opening can be reduced to reduce the intake volume, thereby reducing engine torque. For supercharged engines, when the vehicle's power demand decreases, the throttle opening is rapidly reduced over a short period of time, causing a surge in gas pressure between the supercharger and the throttle. Existing vehicles use a pressure relief valve to address this pressure surge. When the gas pressure between the supercharger and the throttle increases, the pressure relief valve opens to quickly release the pressure, preventing damage to the supercharger blades caused by backflow. However, the inclusion of a pressure relief valve increases the complexity of the vehicle's system, leading to higher maintenance costs and overall vehicle cost.

[0041] To this end, the present application provides a vehicle control method, such as Figure 1 As shown, this method can be used to discharge high-pressure gas from the rear end of a supercharger before the throttle valve without damaging the supercharger blades. This process can be executed by a computing device associated with the target vehicle (e.g., a vehicle computer or a cloud-based server). Certain input parameters or intermediate results in the process can be manually adjusted to help improve accuracy.

[0042] The target vehicle used in this application is a hybrid vehicle, which includes a supercharger and a Figure 2 The parallel-parallel hybrid system shown here primarily consists of an engine, generator, power battery, drive motor, hybrid-specific transmission, controller, and accelerator pedal, and does not include a pressure relief valve. This parallel-parallel hybrid system can achieve pure electric, series, parallel, and direct drive modes.

[0043] The analysis methods involved in the embodiments of this application can be implemented on a terminal device or a server, and this application does not impose any special restrictions on this. It should be noted that the server can be a single device or a system composed of multiple devices, that is, a distributed server, and this application does not impose any specific restrictions on this. For ease of understanding and description, the following embodiments are described in detail using a vehicle computer including a hybrid power control unit as an example.

[0044] like Figure 1 As shown, an embodiment of the present application provides a vehicle control method, including:

[0045] S101: When a target vehicle is in a direct drive mode or a parallel drive mode, obtaining a required power reduction value of the target vehicle in a future time period and / or an accelerator pedal opening reduction value in a preset time period;

[0046] When it is detected that the current driving mode of the target vehicle is a direct drive mode or a parallel drive mode, the required power and accelerator pedal opening of the target vehicle are monitored, and when it is monitored that the required power and / or accelerator pedal opening of the vehicle decreases, the required power decrease value and / or the accelerator pedal opening decrease value are obtained.

[0047] In one embodiment, when obtaining the required power drop value and / or the accelerator pedal opening decrease value, the vehicle's current driving mode needs to be considered to determine the difficulty of obtaining the required power drop value and the accelerator pedal opening decrease value, thereby selecting easier-to-obtain data for subsequent analysis. Therefore, it is necessary to obtain the target vehicle's current driving mode, where the current driving mode should at least include a first driving mode and a second driving mode, wherein the first driving mode is an assisted driving mode and the second driving mode is the driver's autonomous driving mode. Based on the current driving mode, the target vehicle's required power drop value within a future time period and / or the accelerator pedal opening decrease value within a preset time period are obtained. The future time period here refers to a period of time after the current moment, such as within the next 3 seconds; the preset time period refers to a period of time before the current moment, that is, a historical time period, such as within the past 2 seconds.

[0048] By obtaining the current driving mode of the target vehicle and selecting data that is easier to obtain when obtaining the required power reduction value or the accelerator pedal opening reduction value based on the current driving mode, the data acquisition speed is improved, and it is ensured that whether the pressure adjustment conditions are met can be judged in different driving modes. This makes the vehicle control method of the present application applicable to more vehicle models and driving modes, and improves the universality of the method.

[0049] In one embodiment, when the target vehicle is in assisted driving mode, the accelerator pedal position remains unchanged, requiring constant monitoring of the target vehicle's power demand. When the vehicle decelerates, even if the accelerator pedal position remains unchanged, high-pressure gas may still damage the supercharger blades. When a power demand decrease is detected or predicted, the corresponding power demand decrease for the target vehicle in the future time period is determined.

[0050] Therefore, when the target vehicle is in the first driving mode, the target vehicle's driving environment data and current speed are obtained, and a predicted speed change value for the target vehicle in a future time period is determined based on the driving environment data and current speed. The target vehicle's required power reduction value in the future time period is then determined based on the predicted speed change value.

[0051] For example, when the target vehicle is in assisted driving mode and moving at a speed of 90 km / h, if a vehicle in front changes lanes, the target vehicle needs to slow down to avoid it. The assisted driving system calculates that the speed needs to be smoothly reduced to 70 km / h within two seconds. The engine output torque difference corresponding to the two speeds of the target vehicle can be determined, and the required power reduction value within two seconds can be determined.

[0052] When the current driving mode is assisted driving mode, if a vehicle ahead changes lanes, and the target vehicle needs to slow down to avoid it, the throttle opening may decrease, causing high-pressure gas to be generated in front of the throttle after the supercharger, thereby damaging the supercharger blades. In this case, the application determines the predicted value of vehicle speed change in the future time period based on the current driving environment and current speed of the target vehicle, thereby determining the target vehicle's required power reduction value under the premise that the accelerator pedal opening remains unchanged during the assisted driving process, and then determines whether pressure control of the target vehicle is required based on the required power reduction value.

[0053] In one embodiment, a vehicle is equipped with an assisted driving module that includes collision warning and adaptive cruise control. When the target vehicle is in autonomous driving mode, the assisted driving module is also enabled. The target vehicle obtains the accelerator pedal position decrease value within a preset time period and also obtains the required power decrease value for a future time period, as determined by the assisted driving module. Based on the accelerator pedal position decrease value and the required power decrease value, the target vehicle determines whether it meets the pressure adjustment conditions. For example, if the accelerator pedal position decreases and it is predicted that the current road conditions do not require a power decrease, then after a preset delay, the pressure adjustment conditions are determined to be met. If the accelerator pedal position quickly recovers within the delay, then pressure adjustment is not required. If the accelerator pedal position decreases and it is predicted that the vehicle's required power decrease will occur within a future time period corresponding to the current road conditions, then no delay is required, indicating that pressure adjustment is met. This protects the supercharger blades while minimizing unnecessary disconnection of the engine from the wheels and preventing excessive engine speed fluctuations.

[0054] In one embodiment, when the target vehicle is not in assisted driving mode, the driver controls the engine output torque, and thus the vehicle speed, by controlling the accelerator pedal opening. The accelerator pedal opening of the target vehicle can be monitored. When the accelerator pedal opening of the target vehicle decreases, the accelerator pedal opening decrease value within a preset time period is determined.

[0055] When the vehicle is not in assisted driving mode, the accelerator pedal opening of the target vehicle can be directly monitored to obtain the accelerator pedal opening decrease value of the vehicle within a preset time period, which reduces the difficulty of data acquisition and improves the judgment speed when determining whether the pressure adjustment conditions are met.

[0056] S102: Determining whether the target vehicle meets a pressure adjustment condition based on a required power decrease value within the future time period and / or an accelerator pedal opening decrease value within a preset time period.

[0057] Here's an explanation of the pressure adjustment conditions: With existing supercharged engines, when the vehicle's power demand decreases, the throttle opening decreases much faster than the supercharger's idle speed, causing a surge in gas pressure between the back of the supercharger and the front of the throttle. This means that when the user quickly releases the accelerator pedal or the vehicle's power demand drops rapidly, high pressure can form in the space between the back of the supercharger and the front of the throttle. Therefore, when high pressure is generated, or there's a risk of it, the pressure adjustment conditions are considered met, and pressure relief is required.

[0058] After obtaining the required power reduction value and / or the accelerator pedal opening reduction value, it can be determined whether the target vehicle meets the pressure adjustment condition based on the required power reduction value and / or the accelerator pedal opening reduction value of the target vehicle.

[0059] Specifically, when determining whether a target vehicle meets the pressure adjustment conditions, in addition to considering the required power drop and the accelerator pedal opening drop, the target vehicle's current speed must also be considered. It is understood that when the target vehicle's current speed is low, the throttle opening is also low, and damage to the supercharger blades due to a sudden decrease in throttle opening is unlikely. Therefore, the target vehicle is considered to meet the pressure adjustment conditions when the required power drop within a future time period is greater than a first threshold, or the accelerator pedal opening within a preset time period drops to a value greater than a second threshold, or both conditions are met, and the target vehicle's current speed is greater than a preset speed threshold (e.g., 50 km / h). The first and second thresholds can be calibrated in advance. It is understood that the first and second thresholds are dependent on factors such as the engine model, supercharger model, and vehicle speed. Therefore, when calibrating the first and second thresholds, the influence of vehicle model and speed must be considered. Taking the second threshold as an example, when calibrating the second threshold, we first need to determine the gas pressure corresponding to the accelerator pedal opening rate at different vehicle speeds. This gas pressure refers to the pressure of the gas from the supercharger to the throttle valve. The second threshold is then calibrated based on the gas pressure threshold that may cause damage to the supercharger blades. This ensures that the second threshold ensures that the gas pressure corresponding to the accelerator pedal opening rate is below the gas pressure threshold at all vehicle speeds.

[0060] If the target vehicle's power demand drops significantly within a short period of time, or the accelerator pedal opening decreases too much, the target vehicle's throttle opening decreases much faster than the supercharger's power reduction rate. This can easily lead to the generation of high-pressure gas behind the supercharger and before the throttle, potentially damaging the supercharger blades. By monitoring the target vehicle's accelerator pedal opening and power demand in real time, the risk of high-pressure gas generation can be quickly determined, allowing timely implementation of pressure adjustment strategies to prevent damage to the supercharger blades.

[0061] It is understood that the pressure adjustment strategy provided in this application will only be used to adjust the gas pressure before the throttle valve after the supercharger if the pressure adjustment conditions are met. If the pressure adjustment conditions are not met, the target vehicle will continue to drive in the current driving mode.

[0062] S103: increasing the throttle opening of the target vehicle to a preset opening value, and disconnecting the power transmission between the engine and the wheels.

[0063] When the vehicle operating condition data meets the pressure adjustment conditions, at this time, without controlling the pressure relief valve or even installing the pressure relief valve, the high-pressure gas before the throttle of the supercharger can be discharged by simply controlling the throttle, engine and drive motor of the target vehicle to prevent the recoil of the high-pressure gas from damaging the supercharger blades. Specifically, the throttle opening of the target vehicle can be increased to a preset opening value, and the power transmission between the engine and the wheels can be disconnected, and the drive motor can be used to provide the vehicle's operating power. That is, the drive mode of the target vehicle is converted from direct drive mode or parallel drive mode to series drive mode or pure electric drive mode. It is understandable that the reason for the damage to the supercharger blades is that in direct drive mode or parallel drive mode, the throttle opening is reduced, resulting in high-pressure gas recoil. This application increases the throttle opening and converts the drive mode to a series drive mode or a pure electric drive mode to decouple the engine speed from the throttle opening, allowing the high-pressure gas to be discharged through the cylinder and exhaust pipe through the operation of the engine, thereby solving the problem of excessive gas pressure before the throttle after the supercharger without setting a pressure relief valve.

[0064] Here is an explanation of the above drive modes: In direct drive mode, the wheels are directly driven by the engine, and there is no power transmission between the drive motor and the wheels. In series drive mode, the engine does not directly drive the wheels, but only drives the generator to generate electricity. At this time, the electricity is supplied to the drive motor, and the wheels are driven by the drive motor (similar to the "extended range"). In parallel drive mode, both the engine and the drive motor can directly drive the wheels, and they work together through the clutch or gearbox. In pure electric drive mode, the vehicle is completely powered by the battery, the drive motor directly drives the wheels, and the engine does not work.

[0065] In one embodiment, it is understood that during the process of disconnecting the power transmission between the engine and the wheels, the Electronic Control Unit (ECU) will reduce the engine speed by controlling or disconnecting the fuel supply, etc. To avoid wasting the engine speed during this process, the engine can be connected to a generator. The engine speed during the process of disconnecting the power transmission between the engine and the wheels can be used to charge the generator, thereby achieving energy recovery and preventing resource waste. At the same time, the engine parameters after disconnecting the power transmission between the engine and the wheels can be determined based on the current remaining power of the target vehicle.

[0066] Furthermore, after the power transmission between the engine and the wheels is disconnected, that is, after the drive mode is switched, the drive motor provides power to the wheels. By obtaining the current remaining power of the target vehicle, it is determined whether it is necessary to connect the engine to the generator so that the engine drives the generator to generate electricity, which can ensure that the target vehicle has sufficient battery power during subsequent driving. Specifically, if the current remaining power of the target vehicle is lower than the preset power threshold (such as 70%), the engine and the generator are kept connected so that the generator is driven by the engine to charge the battery during subsequent driving; at this time, the output torque of the engine after the power transmission between the engine and the wheels is disconnected can be determined based on the charging power demand corresponding to the current remaining power. At this time, the engine will continue to drive the generator to charge the battery until the battery power reaches another preset power threshold (such as 90%).

[0067] If the target vehicle's remaining charge is at least the preset threshold, it indicates sufficient power and no power generation is required to charge the battery. The engine can be disconnected from the generator and the engine speed reduced to idle to conserve energy.

[0068] After cutting off the power transmission between the engine and the wheels, the present application can, on the one hand, use the engine to power the generator, ensuring that the target vehicle has sufficient battery power during subsequent driving. On the other hand, when the target vehicle has a high remaining battery power, the connection between the engine and the generator can be disconnected to reduce the engine speed and prevent resource waste.

[0069] Furthermore, during the process of reducing the engine speed to idle, the engine speed may be reduced as follows: within a first preset time period, the engine speed is reduced from the current speed to a first preset speed; within a second preset time period after the first preset time period, the engine speed is reduced from the first preset speed to a second preset speed; and within a third preset time period after the second preset time period, the engine speed is reduced from the second preset speed to a third preset speed. The engine speed reduction rate within the second preset time period is set to be lower than the engine speed reduction rates within the first and third preset time periods, thereby preventing abnormal vehicle noise and vibration caused by an excessively rapid reduction in engine speed, thereby improving the user's driving experience.

[0070] Furthermore, when the current remaining power of the target vehicle is higher than a preset power threshold, the engine speed can be adjusted in advance based on the subsequent expected output torque of the engine to ensure that the engine speed does not drop excessively during the process of cutting off the power transmission between the engine and the wheels, resulting in the engine speed needing to be quickly increased when driving power needs to be provided to the wheels again, which in turn leads to a poor driving experience for the user. At this time, based on the current driving data, the reconnection time point when the engine exits the power decoupling state and the expected output torque corresponding to the reconnection time point can be predicted; and the time difference between the current time point and the reconnection time point can be determined; if the time difference is higher than the preset time threshold, it means that the engine will not resume power transmission between the wheels in a short time, and the engine speed can be reduced to a preset speed (such as idle speed); if the time difference is lower than the preset time threshold, the engine speed is slowly reduced by adjusting the fuel injection amount, and the engine speed is adjusted to the engine speed corresponding to the expected output torque before the reconnection time point to avoid a rapid increase in the engine speed leading to a poor driving experience for the user.

[0071] In one embodiment, when adjusting the throttle opening, the throttle opening can be directly adjusted to its maximum value to facilitate the discharge of high-pressure gas. The throttle opening can also be controlled in real time based on the gas pressure between the supercharger and the throttle. This ensures that the gas pressure between the supercharger and the throttle can be smoothly adjusted after the high-pressure gas is generated, preventing damage to the supercharger blades. Furthermore, compared to directly adjusting the throttle opening to its maximum value, precisely controlling the throttle opening allows the throttle opening to be quickly adjusted to the ideal position after the engine resumes power transmission to the wheels, thereby avoiding energy waste from the engine due to excessive throttle opening. Specifically, a boost pressure sensor located between the supercharger and the throttle can determine the pressure between the supercharger and the throttle, and then determine the throttle opening corresponding to this pressure value. The pressure value and throttle opening can be pre-calibrated and stored in the vehicle.

[0072] In one embodiment, after disconnecting the power transmission between the engine and the wheels, and then re-identifying an increase in the vehicle's power demand and / or an increase in the accelerator pedal opening, if the current speed of the target vehicle is higher than a preset speed threshold, the power transmission between the engine and the wheels is reconnected, and the vehicle's driving state is controlled based on the pedal opening and / or the power demand. Specifically, when the accelerator pedal opening is higher than a third preset threshold and / or the power demand is higher than a fourth preset threshold, the engine and the drive motor simultaneously provide power to the wheels. When the accelerator pedal opening is not higher than the third preset threshold and the power demand is not higher than the fourth preset threshold, the power transmission between the drive motor and the wheels is disconnected, and the power is provided to the wheels only by the engine.

[0073] In one embodiment, after the power transmission between the engine and the wheels is disconnected, the method further includes: determining the actual torque output value of the engine based on the required power drop value of the target vehicle in a future time period and / or the accelerator pedal opening drop value in a preset time period; based on the actual torque output value of the engine, determining the drive motor control parameters after the power transmission between the engine and the wheels is disconnected, thereby controlling the output of the drive motor based on the drive motor control parameters to provide power to the target vehicle. The drive motor control parameter can be the motor speed or the motor torque, which is not limited in this application.

[0074] In addition, if Figure 3 As shown, Figure 3 : is a schematic structural diagram of a vehicle control device provided in an embodiment of the present application, the device comprising:

[0075] The data acquisition module 301 acquires a required power reduction value of the target vehicle in a future time period and / or an accelerator pedal opening reduction value in a preset time period when the target vehicle is in a direct drive mode or a parallel drive mode;

[0076] A condition determination module 302 determines that the target vehicle meets a pressure adjustment condition based on a required power decrease value within the future time period and / or an accelerator pedal opening decrease value within a preset time period;

[0077] The vehicle control module 303 increases the throttle opening of the target vehicle to a preset opening value and disconnects the power transmission between the engine and the wheels.

[0078] In a specific embodiment, the data acquisition module 301 includes: obtaining the current driving mode of the target vehicle, the current driving mode including at least one of a first driving mode and a second driving mode; based on the current driving mode, obtaining the required power reduction value of the target vehicle in a future time period and / or the accelerator pedal opening reduction value in a preset time period.

[0079] In a specific embodiment, the data acquisition module 301 includes: when the target vehicle is in the first driving mode, obtaining the driving environment data of the target vehicle and the current speed of the target vehicle; based on the driving environment data and the current speed, determining the speed change prediction value of the target vehicle in the future time period; based on the speed change prediction value, determining the required power reduction value of the target vehicle in the future time period.

[0080] In a specific embodiment, the data acquisition module 301 includes: when the target vehicle is in the second driving mode, acquiring an accelerator pedal opening decrease value of the target vehicle within a preset time period.

[0081] In a specific embodiment, the condition determination module 302 includes: if the required power decrease value in the future time period is greater than a first threshold and / or the accelerator pedal opening decrease value is greater than a second threshold, and the current speed of the target vehicle is higher than a preset speed threshold, then the target vehicle meets the pressure adjustment condition.

[0082] In a specific embodiment, the vehicle control module 303 includes: connecting the engine to the generator of the target vehicle; and determining the engine parameters after disconnecting the power transmission between the engine and the wheels based on the current remaining power of the target vehicle.

[0083] In a specific embodiment, the vehicle control module 303 includes: if the current remaining power of the target vehicle is lower than a preset power threshold, keeping the engine connected to the generator; based on the charging power demand corresponding to the current remaining power, determining the output torque of the engine after disconnecting the power transmission between the engine and the wheels.

[0084] In a specific embodiment, the vehicle control module 303 includes: if the current remaining power of the target vehicle is not lower than a preset power threshold, disconnecting the engine from the generator; reducing the engine speed from the current speed to a first preset speed within a first preset time period; reducing the engine speed from the first preset speed to a second preset speed within a second preset time period after the first preset time period; reducing the engine speed from the second preset speed to a third preset speed within a third preset time period after the second preset time period; the rate of decrease of the engine speed within the second preset time period is lower than the rate of decrease of the engine speed within the first preset time period and the third preset time period.

[0085] In a specific embodiment, the vehicle control module 303 includes: predicting the reconnection time point when the engine exits the power decoupling state and the expected output torque corresponding to the reconnection time point based on current driving data; determining the time difference between the current time point and the reconnection time point; if the time difference is higher than a preset time threshold, reducing the engine speed to a preset speed; if the time difference is lower than the preset time threshold, adjusting the engine speed to the engine speed corresponding to the expected output torque before the reconnection time point.

[0086] In a specific embodiment, the vehicle control module 303 includes: determining a pressure value between the supercharger and the throttle valve by a boost pressure sensor disposed between the supercharger and the throttle valve; and correcting a preset opening value based on the pressure value.

[0087] In a specific embodiment, the vehicle control module 303 includes: determining the actual torque output value of the engine based on the required power reduction value of the target vehicle in a future time period and / or the accelerator pedal opening reduction value in a preset time period; determining the drive motor control parameters after disconnecting the power transmission between the engine and the wheels based on the actual torque output value of the engine; and controlling the operation of the target vehicle based on the drive motor control parameters.

[0088] Regarding the apparatus in the above embodiment, the specific manner in which each unit performs operations has been described in detail in the embodiment of the method, and will not be elaborated on here.

[0089] Figure 4 It is a structural schematic diagram of a vehicle provided in an embodiment of the present application.

[0090] For example, Figure 4 As shown, the vehicle includes: a memory 401 and a processor 402, wherein the memory 401 stores an executable program code 4011, and the processor 402 is used to call and execute the executable program code 4011 to perform the vehicle control method.

[0091] This embodiment can divide the vehicle into functional modules based on the above-described method example. For example, each functional module can be mapped to a specific function, or two or more functions can be integrated into a single processing module. The integrated module can be implemented in hardware. It should be noted that the module division in this embodiment is illustrative and represents only one logical functional division. In actual implementation, other division methods may be used.

[0092] In the case of dividing each functional module into corresponding functional modules, the vehicle may include:

[0093] a data acquisition module for acquiring, when the target vehicle is in a direct drive mode or a parallel drive mode, a required power reduction value of the target vehicle in a future time period and / or an accelerator pedal opening reduction value in a preset time period;

[0094] a condition determination module, determining that the target vehicle satisfies a pressure adjustment condition based on a required power decrease value within the future time period and / or an accelerator pedal opening decrease value within a preset time period;

[0095] The vehicle control module increases the throttle opening of the target vehicle to a preset opening value and disconnects the power transmission between the engine and the wheels.

[0096] It should be noted that all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module and will not be repeated here.

[0097] The vehicle provided in this embodiment is used to execute the above-mentioned vehicle control method, and thus can achieve the same effect as the above-mentioned implementation method.

[0098] In the case of an integrated unit, the vehicle may include a processing module and a storage module. The processing module may be used to control and manage the vehicle's movements, while the storage module may be used to support the vehicle's execution of program codes and data.

[0099] The processing module may be a processor or controller that implements or executes various exemplary logic blocks, modules, and circuits disclosed herein. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processing (DSP) and a microprocessor, and the storage module may be a memory.

[0100] The various embodiments in this application are described in a progressive manner. Similar portions between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the device and medium embodiments are generally similar to the method embodiments, so their descriptions are relatively simple. For relevant portions, refer to the descriptions of the method embodiments.

[0101] The devices and media provided in the embodiments of the present application correspond one-to-one to the methods. Therefore, the devices and media also have similar beneficial technical effects to their corresponding methods. Since the beneficial technical effects of the methods have been described in detail above, the beneficial technical effects of the devices and media will not be repeated here.

[0102] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0103] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0104] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0105] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0106] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0107] Memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.

[0108] Computer-readable media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0109] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0110] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A vehicle control method, characterized in that: Applied to a hybrid vehicle, the hybrid vehicle including a supercharger, the method comprising: When the target vehicle is in the direct drive mode or the parallel drive mode, obtaining a required power reduction value of the target vehicle in a future time period and / or an accelerator pedal opening reduction value in a preset time period; Determining that the target vehicle meets the pressure adjustment condition based on a required power decrease value within the future time period and / or an accelerator pedal opening decrease value within a preset time period; The throttle opening of the target vehicle is increased to a preset opening value, and the power transmission between the engine and the wheels is disconnected.

2. The method according to claim 1, characterized in that The obtaining of the required power reduction value of the target vehicle in a future time period and / or the accelerator pedal opening reduction value in a preset time period specifically includes: Acquire a current driving mode of the target vehicle, where the current driving mode includes at least one of a first driving mode and a second driving mode; Based on the current driving mode, a required power reduction value of the target vehicle in a future time period and / or an accelerator pedal opening reduction value in a preset time period is obtained.

3. The method according to claim 2, characterized in that The obtaining, based on the current driving mode, a required power reduction value of the target vehicle in a future time period and / or an accelerator pedal opening reduction value in a preset time period specifically includes: When the target vehicle is in the first driving mode, obtaining driving environment data of the target vehicle and the current speed of the target vehicle; Determining a predicted value of a vehicle speed change of the target vehicle within a future time period based on the driving environment data and the current vehicle speed; Based on the vehicle speed change prediction value, a required power reduction value of the target vehicle in a future time period is determined.

4. The method according to claim 2, characterized in that The obtaining, based on the current driving mode, a required power reduction value of the target vehicle in a future time period and / or an accelerator pedal opening reduction value in a preset time period specifically includes: When the target vehicle is in the second driving mode, an accelerator pedal opening decrease value of the target vehicle within a preset time period is obtained.

5. The method according to claim 1, wherein The determining that the target vehicle meets the pressure adjustment condition based on the required power decrease value in the future time period and / or the accelerator pedal opening decrease value in the preset time period specifically includes: If the required power decrease value in the future time period is greater than a first threshold and / or the accelerator pedal opening decrease value in the preset time period is greater than a second threshold, and the current speed of the target vehicle is higher than a preset speed threshold, then the target vehicle meets the pressure adjustment condition.

6. The method according to claim 1, wherein After increasing the throttle opening of the target vehicle to a preset opening value and disconnecting the power transmission between the engine and the wheels, the method further includes: connecting the engine to a generator of the target vehicle; Based on the current remaining power of the target vehicle, engine parameters after power transmission between the engine and the wheels is disconnected are determined.

7. The method according to claim 6, characterized in that The determining, based on the current remaining power of the target vehicle, engine parameters after disconnecting power transmission between the engine and the wheels specifically includes: If the current remaining power of the target vehicle is lower than a preset power threshold, keeping the engine connected to the generator; Based on the charging power requirement corresponding to the current remaining power, the output torque of the engine after power transmission between the engine and the wheels is disconnected is determined.

8. The method according to claim 6, characterized in that The determining, based on the current remaining power of the target vehicle, engine parameters after disconnecting power transmission between the engine and the wheels specifically includes: If the current remaining power of the target vehicle is not less than a preset power threshold, disconnecting the engine from the generator; Within a first preset time period, reducing the engine speed from the current speed to a first preset speed; reducing the engine speed from the first preset speed to a second preset speed within a second preset time period after the first preset time period; reducing the engine speed from the second preset speed to a third preset speed within a third preset time period after the second preset time period; The decreasing rate of the engine speed during the second preset time period is lower than the decreasing rate of the engine speed during the first preset time period and the third preset time period.

9. A vehicle control device, characterized in that: Applied to a hybrid vehicle including a supercharger, the device comprises: a data acquisition module for acquiring, when the target vehicle is in a direct drive mode or a parallel drive mode, a required power reduction value of the target vehicle in a future time period and / or an accelerator pedal opening reduction value in a preset time period; a condition determination module, determining that the target vehicle satisfies a pressure adjustment condition based on a required power decrease value within the future time period and / or an accelerator pedal opening decrease value within a preset time period; The vehicle control module increases the throttle opening of the target vehicle to a preset opening value and disconnects the power transmission between the engine and the wheels.

10. A hybrid vehicle, characterized in that: include: a supercharger, at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores instructions executable by the at least one processor, wherein the instructions are executed by the at least one processor to enable the at least one processor to perform: When the target vehicle is in the direct drive mode or the parallel drive mode, obtaining a required power reduction value of the target vehicle in a future time period and / or an accelerator pedal opening reduction value in a preset time period; determining, based on the required power reduction value and / or the accelerator pedal opening reduction value, that the target vehicle satisfies a pressure adjustment condition; The throttle opening of the target vehicle is increased to a preset opening value, and the power transmission between the engine and the wheels is disconnected.

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