Vehicle control method, device and readable storage medium

Abstract

The application discloses a vehicle control method, device and readable storage medium, and relates to the technical field of vehicles, aiming to improve the driving experience of a user. The method comprises the following steps: determining that the vehicle is in a limit working condition; adjusting the power generation of the engine of the vehicle to a first power generation; and adjusting the power discharge of the battery of the vehicle to a first power discharge; the first power generation is a power generation determined after the restriction of noise, vibration and harshness (NVH) on the power generation is removed; the first power discharge is a power discharge determined after the restriction of the state of charge (SOC) on the power discharge is removed; the limit working condition refers to the fact that the driving motor of the vehicle cannot tow the vehicle to drive away from the current region; and the first power generation and the first power discharge are used to supply power to the driving motor.

Description

Technical Field

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

[0002] When the battery charge is low, range-extended hybrid vehicles typically limit power and increase power generation (limiting battery discharge power) to ensure that the battery charge is maintained within the set range in a timely manner, without reducing the user's driving experience.

[0003] However, considering factors such as thermal management (also known as heat damage), noise, vibration and harshness (NVH), and fuel economy, the vehicle's power generation is usually limited to a certain range at low speeds (limited power). However, when the vehicle is stuck in deep snow or climbing a roadside embankment, insufficient power may cause it to become trapped or unable to climb the embankment, resulting in a poor driving experience for the user. Summary of the Invention

[0004] The purpose of this invention is to provide a vehicle control method, device, and readable storage medium to improve the user's driving experience.

[0005] In a first aspect, a vehicle control method is provided, applied to a controller in a range-extended vehicle. The method includes: when the vehicle is determined to be in an extreme operating condition; adjusting the power output of the vehicle engine to a first power output; and adjusting the power output of the vehicle battery to a first power output; the first power output is a power output determined after removing the limitations imposed by vehicle noise, vibration, and acoustic harshness (NVH); the first power output is a power output determined after removing the limitations imposed by the state of charge (SOC); the extreme operating condition refers to the vehicle's drive motor being unable to tow the vehicle away from its current location; and supplying power to the drive motor using the first power output and the first power output.

[0006] Based on the technical solution provided in this application, after determining that the vehicle is under extreme operating conditions, the power generation of the vehicle engine and the power discharge of the vehicle battery can be adjusted, and the adjusted power generation and discharge can be used to power the drive motor. Since the adjusted power generation removes the limitation imposed by vehicle NVH on power generation, and the adjusted power discharge removes the limitation imposed by state of charge (SOC) on power generation, when the battery charge is low and the vehicle is under extreme operating conditions such as being stuck in snow or climbing obstacles, the priority of SOC, NVH, thermal damage, and the need to get out of trouble can be adjusted. This fully utilizes battery power and ensures that the generator generates electricity under a large load, thereby increasing the output power of the drive motor to help the vehicle get out of trouble. This avoids insufficient vehicle power, which could lead to the vehicle being stuck or unable to climb obstacles, thus improving the user's driving experience.

[0007] Furthermore, when it is determined that the vehicle has exited its extreme operating conditions, or that the vehicle is in an abnormal state, the power generation of the vehicle engine is adjusted to a second power generation power; and the discharge power of the vehicle battery is adjusted to a second discharge power; the second power generation power and the second discharge power are used to supply power to the drive motor; wherein, the second power generation power is the minimum value among the required power generation power, the thermal management power generation limit power, and the vehicle NVH power generation limit power; the second discharge power is the product of a preset coefficient and the maximum discharge power of the vehicle battery; the required power generation power is related to the vehicle pedal opening and vehicle speed; the thermal management power generation limit power is negatively correlated with the vehicle engine coolant temperature.

[0008] Furthermore, the method also includes: determining the difference between a preset SOC and the current SOC of the vehicle; determining a preset coefficient based on the difference and a first mapping relationship; the first mapping relationship includes the correspondence between multiple preset differences and multiple preset coefficients.

[0009] Furthermore, determining that the vehicle is in an abnormal state includes: determining whether the vehicle meets a first preset condition; the first preset condition includes at least one of the following: receiving a vehicle fault signal, or the number of times the vehicle slips within a preset time period is greater than a slip count threshold; if the vehicle meets the first preset condition, the vehicle is determined to be in an abnormal state.

[0010] Furthermore, the first discharge power is the maximum discharge power.

[0011] Furthermore, the power generation of the vehicle engine is adjusted, including: obtaining the required power generation and the thermal management power generation limit; the required power generation is related to the vehicle pedal opening and vehicle speed; the thermal management power generation limit is negatively correlated with the vehicle engine coolant temperature; and a first power generation is determined based on the required power generation and the thermal management power generation limit, wherein the first power generation is the minimum value between the required power generation and the thermal management power generation limit.

[0012] Furthermore, determining that the vehicle is in extreme operating conditions includes: determining whether the vehicle meets the second preset condition; if the vehicle meets the second preset condition, determining that the vehicle is in extreme operating conditions; the second preset condition includes the following: the remaining battery power is less than the battery power threshold, the gear signal is the drive gear signal, the duration for which the vehicle pedal opening is greater than the opening threshold is greater than the preset duration, and the vehicle speed is less than the speed threshold.

[0013] Secondly, a vehicle control device is provided, applied to a controller in a range-extended vehicle. The device includes: a determining unit and a processing unit; the determining unit is configured to, when determining that the vehicle is in an extreme operating condition, adjust the power output of the vehicle engine to a first power output; and adjust the power output of the vehicle battery to a first power output; the first power output is a power output determined after removing the limitations imposed by vehicle noise, vibration, and harshness (NVH); the first power output is a power output determined after removing the limitations imposed by the state of charge (SOC); the extreme operating condition refers to the vehicle's drive motor being unable to tow the vehicle away from its current location; the processing unit is configured to supply power to the drive motor using the first power output and the first power output.

[0014] Furthermore, the determining unit is also used to adjust the power generation of the vehicle engine to a second power generation power when it is determined that the vehicle has left its extreme operating conditions or is in an abnormal state; and to adjust the discharge power of the vehicle battery to a second discharge power; the processing unit is also used to supply power to the drive motor using the second power generation power and the second discharge power; wherein, the second power generation power is the minimum value among the required power generation power, the thermal management power generation limit power, and the vehicle NVH power generation limit power; the second discharge power is the product of a preset coefficient and the maximum discharge power of the vehicle battery; the required power generation power is related to the vehicle pedal opening and the vehicle speed; the thermal management power generation limit power is negatively correlated with the vehicle engine coolant temperature.

[0015] Furthermore, the determining unit is also used to determine the difference between the preset SOC and the current SOC of the vehicle; and to determine the preset coefficients based on the difference and the first mapping relationship; the first mapping relationship includes the correspondence between multiple preset differences and multiple preset coefficients.

[0016] Furthermore, the determining unit is specifically used to: determine whether the vehicle meets a first preset condition; the first preset condition includes at least one of the following: receiving a vehicle fault signal, the number of times the vehicle slips within a preset time period is greater than a slip count threshold; if the vehicle meets the first preset condition, determine that the vehicle is in an abnormal state.

[0017] Furthermore, the first discharge power is the maximum discharge power.

[0018] Furthermore, the device also includes an acquisition unit, which is used to acquire the required power generation and the thermal management power generation limit; the required power generation is related to the vehicle pedal opening and the vehicle speed; the thermal management power generation limit is negatively related to the vehicle engine coolant temperature; and a determination unit is also used to determine a first power generation based on the required power generation and the thermal management power generation limit, wherein the first power generation is the minimum value between the required power generation and the thermal management power generation limit.

[0019] Furthermore, the determining unit is specifically used to: determine whether the vehicle meets the second preset condition; if the vehicle meets the second preset condition, determine that the vehicle is in extreme working condition; the second preset condition includes the following: the remaining battery power is less than the battery power threshold, the gear signal is the drive gear signal, the duration of the vehicle pedal opening being greater than the opening threshold is greater than the preset duration, and the vehicle speed is less than the speed threshold.

[0020] Thirdly, a vehicle control device is provided, comprising: a processor; a memory for storing processor-executable instructions; and a component configured to execute instructions, as performed in the first aspect or any possible design of the first aspect.

[0021] Fourthly, a vehicle control system is provided, the vehicle control system including a vehicle control device for performing methods as described in the first aspect or any possible design of the first aspect.

[0022] Fifthly, an electronic device is provided that can implement the components performed by the electronic device in the above aspects or possible designs. The components can be implemented in hardware. For example, in one possible design, the electronic device may include a processor and a communication interface. The processor can be used to support the electronic device in implementing the components involved in the first aspect or any possible design of the first aspect.

[0023] In another possible design, the electronic device may also include a memory for storing necessary computer execution instructions and data. When the electronic device is running, the processor executes the computer execution instructions stored in the memory to cause the electronic device to perform the first aspect or any of the possible vehicle control methods described above.

[0024] In a sixth aspect, a computer-readable storage medium is provided, which may be a readable non-volatile storage medium storing computer instructions or programs that, when executed on a computer, enable the computer to perform the vehicle control methods described in the first aspect or any of the possible methods described above.

[0025] In a seventh aspect, a computer program product containing instructions is provided, which, when run on a computer, enables the computer to execute the vehicle control method described in the first aspect or any possible design of the above aspects.

[0026] The beneficial effects of this invention are:

[0027] (1) Based on the technical solution provided in this application, after determining that the vehicle is in extreme working conditions, the power generation of the vehicle engine and the power discharge of the vehicle battery can be adjusted, and the adjusted power generation and power discharge can be used to power the drive motor. Since the adjusted power generation removes the limitation of the vehicle's NVH on the power generation, and the adjusted power discharge removes the limitation of the state of charge (SOC) on the power discharge, when the battery charge is low and the vehicle is in extreme working conditions such as being stuck in snow or climbing a ditch, the priority of the state of charge, NVH, heat damage, and the need to get out of trouble can be adjusted to make full use of the battery power and ensure that the generator generates electricity at a large load. In this way, the output power of the drive motor can be increased to enable the vehicle to get out of trouble, avoiding the phenomenon of insufficient vehicle power causing the vehicle to be stuck or unable to climb the ditch, thus improving the user's driving experience.

[0028] (2) By utilizing the original power generation and discharge power to power the drive motor when the vehicle is out of its extreme operating conditions or in an abnormal state, the original power generation and discharge power are used. Since the original power generation is limited by the vehicle's NVH (Noise, Vibration, and Harshness), this reduces noise from power generation and improves passenger comfort. Similarly, since the original discharge power is limited by the state of charge (SOC), this prevents the battery from becoming too low, ensuring normal vehicle operation.

[0029] (3) By setting a preset coefficient, the discharge power of the vehicle battery can be reduced when the current SOC of the vehicle is low. This can ensure the smoothness of vehicle driving and power demand while saving energy as much as possible and extending the vehicle's driving range.

[0030] (4) By determining the vehicle abnormality when the vehicle slips at the threshold number of times or when the vehicle is faulty, that is, even if the vehicle's engine power generation and battery discharge power are adjusted, the vehicle cannot get out of trouble. The power generation and discharge power before the adjustment are restored to power the drive motor; this can avoid wasting energy when the vehicle cannot get out of trouble.

[0031] (5) By adjusting the vehicle battery's discharge power to the maximum discharge power, the limitation of the state of charge (SOC) on the discharge power is removed. This increases the output power of the drive motor, enabling the vehicle to get out of trouble and avoiding insufficient power that could cause the vehicle to get stuck or be unable to climb over obstacles, thus improving the user's driving experience.

[0032] (6) By adjusting the vehicle engine's power generation capacity according to demand and thermal management power generation limits, the limitation of vehicle NVH on power generation capacity is removed. This increases the output power of the drive motor, enabling the vehicle to get out of trouble and avoiding insufficient power that could cause the vehicle to get stuck or be unable to climb over obstacles, thus improving the user's driving experience.

[0033] (7) By determining that the vehicle is in extreme working conditions, adjusting the power generation of the vehicle engine and the power discharge of the vehicle battery can increase the output power of the drive motor, so that the vehicle can get out of trouble and avoid the phenomenon of insufficient vehicle power, which leads to the vehicle being stuck or unable to climb the bump, thus improving the user's driving experience.

[0034] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application, and do not constitute an undue limitation of this application.

[0036] Figure 1 This is a schematic diagram of the structure of a vehicle control system provided in an embodiment of this application;

[0037] Figure 2 This is a schematic diagram of the structure of a vehicle control device provided in an embodiment of this application;

[0038] Figure 3 A schematic flowchart of a vehicle control method provided in an embodiment of this application;

[0039] Figure 4 This is a schematic flowchart of another vehicle control method provided in an embodiment of this application;

[0040] Figure 5 This is a schematic flowchart of another vehicle control method provided in an embodiment of this application;

[0041] Figure 6 This is a schematic diagram of another vehicle control device provided in an embodiment of this application. Detailed Implementation

[0042] To enable those skilled in the art to better understand the technical solutions of this disclosure, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0043] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the embodiments of this application as detailed in the appended claims.

[0044] It should also be understood that the term "comprising" indicates the presence of the described feature, whole, step, operation, element and / or component, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements and / or components.

[0045] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0046] When the battery charge is low, range-extended hybrid vehicles typically limit power and increase power generation (limiting battery discharge power) to ensure that the battery charge is maintained within the set range in a timely manner, without reducing the user's driving experience.

[0047] However, due to factors such as thermal management (also known as heat damage), NVH (noise, vibration, and harshness), and fuel economy, the vehicle's power generation is usually limited to a certain range at low speeds (power limitation). When the vehicle gets stuck in deep snow or is climbing a roadside ditch, insufficient power may cause it to become trapped or unable to move, potentially requiring auxiliary devices or external force to achieve the desired result. This causes significant inconvenience for the driver and results in a poor driving experience.

[0048] In some embodiments, the deceleration of a single wheel of a spinning wheel can be continuously calculated by wheel speed; the wheel speed limit of the spinning wheel can be dynamically adjusted by the control execution module based on the wheel speed and the corresponding single wheel deceleration, so as to achieve vehicle anti-skid and unslipping by increasing the torque of the stuck wheel.

[0049] In other embodiments, the vehicle's gear can be fixed at the lowest gear, and the vehicle's status can be determined based on the vehicle's weight information. Based on the current pedal opening and vehicle status, a target torque for lifting can be determined. Using the target torque for lifting as the adjustment target, the current torque can be adjusted according to the lifting torque adjustment slope, which is less than the conventional torque adjustment slope in normal driving mode. This allows the torque and power of the drive wheels to gradually increase to a more reasonable target torque corresponding to the current vehicle status, thereby improving the success rate of the trapped vehicle's autonomous extrication.

[0050] In other embodiments, the ground can be compacted by an actuator, and the condition for getting out of trouble can be analyzed based on the specific rotation of the vehicle's wheels. If the condition for getting out of trouble is met, the personnel inside the vehicle can be instructed to perform the corresponding operations to get the vehicle out of trouble.

[0051] However, the above embodiments do not consider methods for vehicles getting stuck in snow or climbing ruts. Therefore, this application provides a vehicle control method, comprising: a controller applied in a range-extended vehicle; the method comprising: when the vehicle is determined to be in an extreme operating condition; adjusting the power output of the vehicle engine to a first power output; and adjusting the power output of the vehicle battery to a first power output; the first power output is determined after removing the limitations imposed by vehicle noise, vibration, and acoustic harshness (NVH); the first power output is determined after removing the limitations imposed by the state of charge (SOC); the extreme operating condition refers to the vehicle's drive motor being unable to tow the vehicle away from its current location; and using the first power output and the first power output to supply power to the drive motor.

[0052] It should be noted that the vehicle control method described in the embodiments of this application is for the purpose of more clearly illustrating the technical solution of the embodiments of this application, and does not constitute a limitation on the technical solution provided in the embodiments of this application. As those skilled in the art will know, with the evolution of vehicle control methods and the emergence of other vehicle control methods, the technical solution provided in the embodiments of this application is also applicable to similar technical problems.

[0053] The vehicle control method provided in this application can be applied to vehicle controllers. The embodiments of this application do not limit the specific technology, quantity, or form of the testing equipment used.

[0054] Figure 1 This is a schematic diagram of the structure of a vehicle control system 10 provided in an embodiment of this application, as shown below. Figure 1 As shown, the vehicle control system 10 may include a controller 11 and a vehicle 12.

[0055] The controller 11 and the vehicle 12 are connected. For example, the controller 11 and the vehicle 12 can be connected by wired means or wireless means, and this embodiment of the invention does not limit the connection.

[0056] Controller 11 is used to coordinate and control the operation of various parts of the vehicle. The main function of controller 11 is to send control commands to the powertrain and other onboard auxiliary systems based on the driver's intentions and vehicle status information, through the implementation of control strategies, to achieve safe, efficient, and stable vehicle operation. Specifically, controller 11 can determine whether the vehicle is under extreme operating conditions, and if so, adjust the power generation of the vehicle engine and the power discharge of the vehicle battery, and use the adjusted power generation and discharge to supply power to the drive motor. For example, controller 11 may be a vehicle control unit (VCU). The embodiments of this application do not limit the specific technology, quantity, or form of the controller 11.

[0057] Vehicle 12 is used to receive control commands from the controller and adjust the power generation of the vehicle engine and the power discharge of the vehicle battery according to the control commands. This application embodiment does not limit the specific technology, quantity, or form of vehicle 12.

[0058] In practical implementation, Figure 1 The controller 11 in the middle can be adopted Figure 2 The shown composition structure, or including Figure 2 The components shown. Figure 2 This is a schematic diagram of the structure of a vehicle control device 200 provided in an embodiment of this application. The vehicle control device 200 can be a controller 11 in a vehicle control system, or it can be a chip or system-on-a-chip in the controller 11. Figure 2 As shown, the vehicle control device 200 includes a processor 201, a communication interface 202, and a communication line 203.

[0059] Furthermore, the vehicle control device 200 may also include a memory 204. The processor 201, the memory 204, and the communication interface 202 can be connected via a communication line 203.

[0060] The processor 201 can be a CPU, a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor 201 can also be other devices with processing components, such as circuits, devices, or software modules, without limitation.

[0061] Communication interface 202 is used to communicate with other devices or other communication networks. Communication interface 202 can be a module, circuit, communication interface, or any device capable of enabling communication.

[0062] Communication line 203 is used to transmit information between the various components included in the vehicle control device 200.

[0063] Memory 204 is used to store instructions executable by processor 201. These instructions may be computer programs.

[0064] The memory 204 can be a read-only memory (ROM) or other type of static storage device that can store static information and / or instructions; it can also be a random access memory (RAM) or other type of dynamic storage device that can store information and / or instructions; it can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.

[0065] It should be noted that the memory 204 can exist independently of the processor 201 or can be integrated with the processor 201. The memory 204 can be used to store instructions, program code, or some data, etc. The memory 204 can be located inside or outside the vehicle control device 200, without limitation. The processor 201 is used to execute the instructions stored in the memory 204 to implement the vehicle control method provided in the following embodiments of this application.

[0066] In one example, processor 201 may include one or more CPUs, for example, Figure 2 CPU0 and CPU1 in the CPU.

[0067] As an optional implementation, the vehicle control unit 200 includes multiple processors, for example, besides Figure 2 In addition to processor 201, it may also include processor 205.

[0068] It should be pointed out that, Figure 2 The composition shown does not constitute a basis for this. Figure 1 The limitations of each device in the process, except Figure 2 In addition to the components shown, Figure 1 The vehicle control device 12 in the middle may include a ratio Figure 2 More or fewer components, or combinations of certain components, or different arrangements of components.

[0069] In this embodiment of the application, the chip system may be composed of chips or may include chips and other discrete devices.

[0070] Furthermore, the actions, terms, etc., involved in the various embodiments of this application can be referenced interchangeably without limitation. The message names or parameter names in the messages exchanged between the various devices in the embodiments of this application are merely examples, and other names may be used in specific implementations without limitation.

[0071] The following is combined Figure 1 The vehicle control system shown herein describes the vehicle control method provided in the embodiments of this application.

[0072] This application uses an example of a controller for illustration. For instance, the controller can be... Figure 1 Controller 11 in the middle. For example... Figure 3 As shown, the method includes the following steps S301-S303:

[0073] S301. Determine if the vehicle is under extreme operating conditions.

[0074] The vehicle in this context is a range-extended vehicle. For example, it may include an engine, battery, and drive motor. The engine can be used to power the battery and / or drive motor. The battery can be used to power the drive motor. The drive motor is used to propel the vehicle.

[0075] Extreme operating conditions refer to situations where the vehicle's drive motor is unable to pull the vehicle away from its current location. For example, the current location could be a slippery area on snow or an area with an uphill road ahead.

[0076] As one possible implementation, the controller can respond to the user's control commands and determine whether the vehicle is in extreme operating conditions.

[0077] In one example, the controller can determine that the vehicle is in an extreme operating condition upon receiving a control command from the user, and determine that the vehicle is in a normal operating condition if no control command is received from the user.

[0078] Control commands can refer to commands generated in response to the driver's control operations. For example, control commands can be commands input by the driver through the input device of the vehicle's central control screen (such as a touch screen or buttons), or they can be control commands input by the driver via voice.

[0079] In one example, the vehicle is pre-configured with an extreme operating condition mode, and the control command can be the activation of the "extreme operating condition mode".

[0080] As another possible implementation, the vehicle control device can determine whether the vehicle meets the second preset condition, and if the vehicle meets the second preset condition, determine that the vehicle is in extreme operating condition.

[0081] The second preset conditions include: the remaining battery power is less than the battery power threshold, the gear signal is a drive gear signal, the duration for which the vehicle pedal opening is greater than the opening threshold is greater than the preset duration, and the vehicle speed is less than the speed threshold.

[0082] The battery level threshold can be set as needed, for example, to 10%. The drive gear signal can include a forward gear signal and a reverse gear signal. The opening threshold can be 90% of the maximum opening. The preset duration can be 1 second (s). The speed threshold can be 0.5 kilometers per hour (km / h) (used to determine vehicle start-up).

[0083] S302. When it is determined that the vehicle is under extreme operating conditions, the power generation of the vehicle engine is adjusted to a first power generation power; and the power discharge of the vehicle battery is adjusted to a first power discharge power.

[0084] The first power generation is the power generation power determined after removing the limitations imposed by vehicle noise, vibration, and acoustic roughness (NVH); the first discharge power is the discharge power determined after removing the limitations imposed by the state of charge (SOC).

[0085] As one possible implementation, the controller can adjust the discharge power of the vehicle battery to the maximum discharge power; and adjust the power generation power of the vehicle engine according to the demand power generation and the thermal management power generation limit power.

[0086] It should be noted that the first power generation of the vehicle engine is the minimum of the required power generation and the thermal management power generation limit.

[0087] The controller can determine the first discharge power according to Formula 1 and the second power generation according to Formula 2.

[0088] P rea1 =P bat Formula 1

[0089] P req2 =min(P genr P hot Formula 2

[0090] Among them, P req1 P represents the first discharge power. bat This represents the maximum discharge power (also known as the usable discharge power). P req2 This represents the first power generation. `min()` indicates selecting the minimum value. P genr This represents the required power generation capacity (also known as the initial power generation capacity). P hot This indicates the power generation limitation for thermal management (also known as the power limitation for heat damage).

[0091] For example, P bat It can be 50kW, 60kW, etc. P genr It can be 30kW or 50kW. hot It can be 25kW, 40kW, etc.

[0092] In practical applications, the number of times the vehicle engine's power generation and the vehicle battery's power discharge are adjusted during a single driving cycle is less than the threshold number.

[0093] In some embodiments, during the process of adjusting the power generation of the vehicle engine and the power discharge of the vehicle battery, the controller can gradually adjust the power generation of the vehicle engine and the power discharge of the vehicle battery through filtering or gradient processing.

[0094] This reduces the jerking sensation while driving, improves driving smoothness, and enhances the driving experience.

[0095] S303, Power the drive motor with the first power generation and the first power discharge.

[0096] The specific details of the first power generation and the first power discharge can be found in the description of S302, and will not be repeated here.

[0097] In one example, the vehicle engine and the vehicle battery are respectively connected to the drive motor via electrical connection lines. The controller can control the vehicle engine to supply power to the drive motor with a first power generation capacity through the electrical connection line between the vehicle engine and the drive motor; and control the vehicle battery to supply power to the drive motor with a first power discharge capacity through the electrical connection line between the vehicle battery and the drive motor.

[0098] Based on the technical solution provided in this application, after determining that the vehicle is under extreme operating conditions, the power generation of the vehicle engine and the power discharge of the vehicle battery can be adjusted, and the adjusted power generation and discharge can be used to power the drive motor. Since the adjusted power generation removes the limitation imposed by vehicle NVH on power generation, and the adjusted power discharge removes the limitation imposed by state of charge (SOC) on power discharge, when the battery charge is low and the vehicle is under extreme operating conditions such as being stuck in snow or climbing obstacles, the priority of SOC, NVH, thermal damage, and the need to get out of trouble can be adjusted. This fully utilizes battery power and ensures that the generator generates electricity under a large load, thereby increasing the output power of the drive motor to help the vehicle get out of trouble. This avoids insufficient vehicle power, which could lead to the vehicle being stuck or unable to climb obstacles, thus improving the user's driving experience.

[0099] One possible implementation, such as Figure 4 As shown, the vehicle control method of this application may further include the following S401-S403.

[0100] S401. Determine whether the vehicle has exited its extreme operating conditions, or whether the vehicle is in an abnormal state.

[0101] As one possible implementation, the controller can determine that the vehicle has left the extreme operating condition if the vehicle meets a third preset condition; and determine that the vehicle has not left the extreme operating condition if the vehicle does not meet the third preset condition. If the vehicle meets a first preset condition, the controller determines that the vehicle is in an abnormal state; and if the vehicle does not meet the first preset condition, the controller determines that the vehicle is in a normal state.

[0102] The third preset condition includes at least one of the following: vehicle speed is a second vehicle speed threshold, and the gear signal is a non-driving gear signal. The first preset condition includes at least one of the following: receiving a vehicle fault signal, and the number of times the vehicle slips within a preset time period is greater than a slip count threshold.

[0103] The second vehicle speed threshold can be set as needed. For example, it can be 8 km / h. The non-drive gear signal can be a parking gear signal or a neutral gear signal. The vehicle fault signal can be an engine fault signal, a battery fault signal, a drive motor fault signal, etc. The preset time period can be 30 seconds, etc. The slippage number threshold can be 3 times, etc.

[0104] In practical applications, the controller can determine whether the vehicle is slipping based on whether the vehicle's slip ratio is greater than the slip threshold.

[0105] For example, the controller can determine that the vehicle is skidding if its slip ratio is greater than a slip threshold, or if its slip ratio is less than or equal to a slip threshold.

[0106] It should be noted that the controller can determine the vehicle's slip ratio according to the following formula three.

[0107] Formula 3: H = (V1 - V2) / V2

[0108] Where H represents the vehicle's slip ratio, V1 represents the vehicle's tire rotation speed, and V2 represents the vehicle's speed.

[0109] S402. When it is determined that the vehicle has left its extreme operating condition or is in an abnormal state, the power generation of the vehicle engine is adjusted to a second power generation power, and the power discharge of the vehicle battery is adjusted to a second power discharge power.

[0110] Among them, the second power generation is the minimum value among the demand power generation, the thermal management power generation limit, and the vehicle NVH power generation limit; the second discharge power is the product of the preset coefficient and the maximum discharge power of the vehicle battery; the demand power generation is related to the vehicle pedal opening and vehicle speed; the thermal management power generation limit is negatively correlated with the vehicle engine coolant temperature.

[0111] The thermal management power generation limitation is negatively correlated with the vehicle engine coolant temperature. The higher the vehicle engine coolant temperature, the lower the thermal management power generation limitation.

[0112] In one example, the second power generation can be determined according to Formula 4 below; the second power discharge can be determined according to Formula 5 below.

[0113] P req3 =C1×P bat Formula 4

[0114] P req4 =min(P genr P nvh P hot Formula 5

[0115] Among them, P req3 This indicates the second discharge power. P req4 This indicates the second power generation capacity. C1 represents the preset coefficient. P nvh Indicates the vehicle's NVH (Noise, Vibration, and Harshness) power generation limitation. C1 and P nvh It can be set as needed. For example, C1 can be 0.2 / 0.5, etc. P nvh It can be 20kW, 35kW, etc. The power generation limit for vehicle NVH is positively correlated with vehicle speed.

[0116] In some implementations, the controller can determine the vehicle's NVH power generation limit based on a second mapping relationship. The second mapping relationship can include a correspondence between multiple preset vehicle speeds and multiple preset vehicle NVH power generation limits. For example, the second mapping relationship can be shown in Table 1 below.

[0117] Table 1. Schematic diagram of the second mapping relationship.

[0118] vehicle speed 0km / h 10km / h 50km / h 100km / h 130km / h Vehicle NVH power generation limitation 5kW 8kW 25kw 50kW 80kW

[0119] It should be noted that Table 1 is only an illustrative example, and the second mapping relationship may also include other mapping data without limitation.

[0120] In some embodiments, the controller can determine the difference between a preset SOC and the vehicle's current SOC, and determine a preset coefficient based on the difference and a first mapping relationship.

[0121] The first mapping relationship includes the correspondence between multiple preset differences and multiple preset coefficients.

[0122] S403, using the second power generation and the second power discharge to power the drive motor.

[0123] In some implementations, such as Figure 5 As shown, the vehicle control method of this application may further include the following S501-S504.

[0124] S501. Determine if the vehicle is under extreme operating conditions.

[0125] The specific process of this step can be referred to in the description of S301 above, and will not be repeated here.

[0126] If the vehicle is under extreme operating conditions, execute S503. If the vehicle is not under extreme operating conditions, execute S502.

[0127] S502, using the second power generation and the second power discharge to power the drive motor.

[0128] The specific process of this step can be referred to in the description of S302 above, and will not be repeated here.

[0129] S503, Power the drive motor with the first power generation and the first power discharge.

[0130] The specific process of this step can be referred to in the description of S302 above, and will not be repeated here.

[0131] S504. Determine whether the vehicle has exited its extreme operating conditions, or whether the vehicle is in an abnormal state.

[0132] S502 is executed when it is determined that the vehicle has deviated from its extreme operating conditions or is in an abnormal state.

[0133] The various solutions in the above embodiments of this application can be combined without contradiction.

[0134] This application embodiment can divide the controller into component modules or component units according to the above method examples. For example, each component can be divided into its own component module or component unit, or two or more components can be integrated into one processing module. The integrated module can be implemented in hardware or as a software component module or component unit. The module or unit division in this application embodiment is illustrative and represents only one logical component division; other division methods may be used in actual implementation.

[0135] When dividing each function into modules according to its corresponding function. Figure 6 A schematic diagram of a vehicle control device 600 is shown. The vehicle control device can be a vehicle control unit or a chip applied in a vehicle control unit. The vehicle control device 600 can be used to perform the functions of the vehicle control unit involved in the above embodiments. Figure 6 The vehicle control device 600 shown may include: a determining unit 601 and a processing unit 602; the determining unit 601 is used to, when determining that the vehicle is in an extreme operating condition, adjust the power generation of the vehicle engine to a first power generation power; and adjust the discharge power of the vehicle battery to a first discharge power; the first power generation power is the power generation power determined after removing the limitations imposed by vehicle noise, vibration, and acoustic roughness (NVH) on the power generation power; the first discharge power is the discharge power determined after removing the limitations imposed by the state of charge (SOC) on the discharge power; the extreme operating condition refers to the vehicle's drive motor being unable to pull the vehicle away from its current location; the processing unit 602 is used to supply power to the drive motor using the first power generation power and the first discharge power.

[0136] Furthermore, the determining unit 601 is also used to adjust the power generation of the vehicle engine to a second power generation power when it is determined that the vehicle has left its extreme operating condition or is in an abnormal state; and to adjust the discharge power of the vehicle battery to a second discharge power; the processing unit 602 is also used to supply power to the drive motor using the second power generation power and the second discharge power; wherein, the second power generation power is the minimum value among the required power generation power, the thermal management power generation limit power, and the vehicle NVH power generation limit power; the second discharge power is the product of a preset coefficient and the maximum discharge power of the vehicle battery; the required power generation power is related to the vehicle pedal opening and the vehicle speed; the thermal management power generation limit power is negatively correlated with the vehicle engine coolant temperature.

[0137] Furthermore, the determining unit 601 is also used to determine the difference between the preset SOC and the current SOC of the vehicle; and to determine the preset coefficients based on the difference and the first mapping relationship; the first mapping relationship includes the correspondence between multiple preset differences and multiple preset coefficients.

[0138] Furthermore, the determining unit 601 is specifically used to: determine whether the vehicle meets the first preset condition; the first preset condition includes at least one of the following: receiving a vehicle fault signal, the number of times the vehicle slips within a preset time period is greater than the slip count threshold; if the vehicle meets the first preset condition, determine that the vehicle is in an abnormal state.

[0139] Furthermore, the first discharge power is the maximum discharge power.

[0140] Furthermore, the device also includes an acquisition unit 603, which is used to acquire the required power generation and the thermal management power generation limit; the required power generation is related to the vehicle pedal opening and vehicle speed; the thermal management power generation limit is negatively related to the vehicle engine coolant temperature; the determination unit 601 is also used to determine a first power generation based on the required power generation and the thermal management power generation limit, wherein the first power generation is the minimum value of the required power generation and the thermal management power generation limit.

[0141] Furthermore, the determining unit 601 is specifically used to: determine whether the vehicle meets the second preset condition; if the vehicle meets the second preset condition, determine that the vehicle is in extreme working condition; the second preset condition includes the following: the remaining power is less than the power threshold, the gear signal is the drive gear signal, the duration of the vehicle pedal opening being greater than the opening threshold is greater than the preset duration, and the vehicle speed is less than the speed threshold.

[0142] This application also provides a computer-readable storage medium. All or part of the processes in the above method embodiments can be implemented by a computer program instructing related hardware. This program can be stored in the computer-readable storage medium, and when executed, it can include the processes of the above method embodiments. The computer-readable storage medium can be an internal storage unit of the target website identification device (including a data sending end and / or a data receiving end) in any of the foregoing embodiments, such as the hard disk or memory of the target website identification device. The computer-readable storage medium can also be an external storage device of the terminal device, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the terminal device. Further, the computer-readable storage medium can include both the internal storage unit of the target website identification device and an external storage device. The computer-readable storage medium is used to store the computer program and other programs and data required by the target website identification device. The computer-readable storage medium can also be used to temporarily store data that has been output or will be output.

[0143] Furthermore, the actions, terms, etc., involved in the various embodiments of this application can be referenced interchangeably without limitation. The message names or parameter names in the messages exchanged between the various devices in the embodiments of this application are merely examples, and other names may be used in specific implementations without limitation.

[0144] It should be noted that the terms "first" and "second," etc., in the specification, claims, and drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0145] It should be understood that in this application, "at least one (item)" means one or more, "more than one" means two or more, "at least two (items)" means two or three or more, and "and / or" is used to describe the relationship between related objects, indicating that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0146] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above-mentioned component modules is used as an example. In practical applications, the above-mentioned components can be assigned to different component modules as needed, that is, the internal structure of the device can be divided into different component modules to complete all or part of the components described above.

[0147] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules or units is only a logical component division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0148] The units described as separate components may or may not be physically separate. A component shown as a unit can be one or more physical units; that is, it can be located in one place or distributed in multiple different locations. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0149] Furthermore, the component units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software component unit.

[0150] If the integrated unit is implemented as a software component and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solutions of the embodiments of this application, in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0151] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A vehicle control method, characterized in that, The method, which is applied to a controller in a range-extended vehicle, includes: When the vehicle is determined to be under extreme operating conditions, the required power generation and the thermal management power generation limit are obtained; the required power generation is related to the vehicle pedal opening and vehicle speed; the thermal management power generation limit is negatively correlated with the vehicle engine coolant temperature. The first power generation is determined based on the demand power generation and the thermal management power generation limitation, wherein the first power generation is the minimum value between the demand power generation and the thermal management power generation limitation. The power generation of the vehicle engine is adjusted to the first power generation power; and the power discharge of the vehicle battery is adjusted to the first power discharge power; the first power generation power is the power generation power determined after removing the limitations imposed by vehicle noise, vibration and acoustic roughness (NVH); the first power discharge power is the power discharge power determined after removing the limitations imposed by state of charge (SOC); the extreme operating condition refers to the situation where the vehicle's drive motor cannot pull the vehicle away from its current location. The first power generation and the first power discharge are used to power the drive motor.

2. The vehicle control method according to claim 1, characterized in that, The method further includes: If it is determined that the vehicle has left the extreme operating condition, or that the vehicle is in an abnormal state, the power generation of the vehicle engine is adjusted to a second power generation power, and the power discharge of the vehicle battery is adjusted to a second power discharge power. The second power generation and the second power discharge are used to power the drive motor; Wherein, the second power generation is the minimum value among the demand power generation, the thermal management power generation limit, and the vehicle NVH power generation limit; the second discharge power is the product of a preset coefficient and the maximum discharge power of the vehicle battery; the demand power generation is related to the vehicle pedal opening and vehicle speed; and the thermal management power generation limit is negatively correlated with the vehicle engine coolant temperature.

3. The vehicle control method according to claim 2, characterized in that, The method further includes: Determine the difference between the preset SOC and the current SOC of the vehicle; The preset coefficients are determined based on the differences and the first mapping relationship; the first mapping relationship includes the correspondence between multiple preset differences and multiple preset coefficients.

4. The vehicle control method according to claim 2, characterized in that, Determining that the vehicle is in an abnormal state includes: Determine whether the vehicle meets a first preset condition; the first preset condition includes at least one of the following: receiving a vehicle fault signal, or the number of times the vehicle slips within a preset time period is greater than a slip count threshold. If the vehicle meets the first preset condition, the vehicle is determined to be in an abnormal state.

5. The vehicle control method according to claim 2, characterized in that, The first discharge power is the maximum discharge power.

6. The vehicle control method according to any one of claims 1-5, characterized in that, The determination that the vehicle is in extreme operating conditions includes: Determine whether the vehicle meets the second preset condition; If the vehicle meets the second preset conditions, it is determined that the vehicle is in the extreme working condition; the second preset conditions include the following: the remaining power is less than the power threshold, the gear signal is the drive gear signal, the duration for which the vehicle pedal opening is greater than the opening threshold is greater than the preset duration, and the vehicle speed is less than the speed threshold.

7. A vehicle control device, characterized in that, A controller for use in range-extended vehicles, the device comprising: an acquisition unit, a determination unit, and a processing unit; The acquisition unit is used to acquire the required power generation and the thermal management power generation limit when the vehicle is determined to be under extreme operating conditions; the required power generation is related to the vehicle pedal opening and vehicle speed; the thermal management power generation limit is negatively correlated with the vehicle engine coolant temperature. The determining unit is configured to determine a first power generation based on the demand power generation and the thermal management power generation limitation, wherein the first power generation is the minimum value between the demand power generation and the thermal management power generation limitation. The determining unit is further configured to adjust the power generation of the vehicle engine to the first power generation power; and to adjust the discharge power of the vehicle battery to the first discharge power; the first power generation power is the power generation power determined after removing the limitations imposed by vehicle noise, vibration, and acoustic roughness (NVH); the first discharge power is the discharge power determined after removing the limitations imposed by the state of charge (SOC); the extreme operating condition refers to the situation where the vehicle's drive motor cannot pull the vehicle away from its current location. The processing unit is used to supply power to the drive motor using the first power generation and the first power discharge.

8. An electronic device, characterized in that, include: The electronic device includes a processor, a memory, and a communication interface; wherein the communication interface is used for communication between the electronic device and other devices or networks. The memory is used to store one or more programs, the one or more programs including computer-executable instructions, which, when the electronic device is running, are executed by the processor to execute the computer-executable instructions stored in the memory to cause the electronic device to perform the method of any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, When the computer-executable instructions stored in the computer-readable storage medium are executed by the processor of the electronic device, the electronic device is capable of performing the method as described in any one of claims 1-6.

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