Control method, device and equipment for vehicle range extender

Abstract

The invention discloses a control method, device and equipment for a vehicle range extender, and relates to the technical field of vehicle control. The method comprises the steps that a range extending mode currently corresponding to a first vehicle is automatically obtained, the range extending mode is used for indicating the starting priority of a vehicle range extender of the first vehicle, and the vehicle range extender comprises an engine and a generator; under the condition that the electric quantity of the first vehicle is smaller than the preset range extending electric quantity, the engine is started according to the preset rotating speed on the basis of the range extending mode, and the preset range extending electric quantity is preset on the basis of the type of the range extending mode; determining a target rotating speed corresponding to the engine and a target generated power corresponding to the generator according to the type of the range extending mode, and determining a target torque corresponding to the engine in the range extending mode based on the target rotating speed and the target generated power; and the engine is controlled to work according to the target torque, and the vehicle range extending control performance can be improved.

Description

Technical Field

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

[0002] In the field of new energy vehicles, the start-stop control of the range extender is a key technology that aims to improve the energy efficiency and driving performance of the vehicle. With the increase of environmental awareness and the advancement of battery technology, the range-extended electric vehicle, as a new type of clean energy vehicle, has gradually gained favor in the market. This type of vehicle uses a small internal combustion engine as a range extender, which starts when the battery is low to charge the battery or directly drive the motor, thus effectively solving the problem of short driving range of pure electric vehicles.

[0003] In the related art, for the start-stop control of the range extender, the start and stop times of the range extender are usually determined based on parameters such as the vehicle battery state of charge (SOC), vehicle speed, acceleration, etc. For example, when the SOC drops to a preset threshold, the range extender is automatically started in a fixed manner to charge, and when the SOC returns to a higher level, the range extender stops working.

[0004] However, the above method can only determine the start and stop time of the range extender, and it is difficult to adapt to complex driving conditions and changeable driving behaviors. During the process of starting the range extender, the fuel consumption and battery performance are low, and it is difficult to ensure the vehicle's power and economy requirements. Summary of the invention

[0005] The embodiment of the present application provides a control method, device and equipment for a vehicle range extender, which can extend the range control performance. The technical solution is as follows.

[0006] In one aspect, a method for controlling a vehicle range extender is provided, the method comprising:

[0007] Automatically acquiring a range-extending mode currently corresponding to a first vehicle, the range-extending mode being used to indicate a start priority of a vehicle range extender of the first vehicle, the vehicle range extender including an engine and a generator;

[0008] When the power of the first vehicle is less than a preset range-extending power, starting the engine at a preset speed based on the range-extending mode, wherein the preset range-extending power is pre-set based on the type of the range-extending mode;

[0009] Determine target speeds corresponding to the engine and the generator and target power generation corresponding to the generator according to the type of the range-extending mode, and determine a target torque corresponding to the engine in the range-extending mode based on the target speed and the target power generation;

[0010] The engine is controlled according to the target torque.

[0011] In another aspect, a control device for a vehicle range extender is provided, the device comprising:

[0012] A first determination module, configured to automatically obtain a range-extending mode currently corresponding to a first vehicle, wherein the range-extending mode is used to indicate a start priority of a vehicle range extender of the first vehicle, wherein the vehicle range extender includes an engine and a generator;

[0013] an extended-range starting module, configured to start the engine at a preset speed based on the extended-range mode when the power of the first vehicle is less than a preset extended-range power, wherein the preset extended-range power is pre-set based on the type of the extended-range mode;

[0014] a second determination module, configured to determine target speeds corresponding to the engine and the generator, and a target power generation corresponding to the generator according to the type of the range-extending mode, and determine a target torque corresponding to the engine in the range-extending mode based on the target speed and the target power generation;

[0015] The range-extending control module is used to control the operation of the engine according to the target torque.

[0016] In some embodiments, the extended range mode includes at least one of a fuel mode, a pure electric mode, an extreme pure electric mode, and an automatic mode;

[0017] The start priorities indicated by the fuel mode, the pure electric mode and the extreme pure electric mode are arranged in descending order;

[0018] The automatic mode is used to control the range-extended mode of the first vehicle to automatically switch between the fuel mode, the pure electric mode and the extreme pure electric mode;

[0019] The fuel mode corresponds to a first preset extended-range power, the pure electric mode corresponds to a second preset extended-range power, and the extreme pure electric mode corresponds to a third preset extended-range power, wherein the first preset extended-range power, the second preset extended-range power and the third preset extended-range power are arranged in order from high to low.

[0020] In some embodiments, the extended range mode includes the fuel mode; and the second determination module is further configured to:

[0021] In the case where the speed of the first vehicle is greater than a preset speed, the preset speed is determined as a first target speed, and a first target power generation corresponding to the first target speed is determined based on an engine universal characteristic curve corresponding to the engine; a first target torque corresponding to the engine in the fuel mode is determined based on the first target speed and the first target power generation;

[0022] When the speed of the first vehicle is less than a preset speed, determining a second target power generation and a second target speed according to the noise, vibration and harshness (NVH) of the first vehicle; determining a second target torque corresponding to the engine in the fuel mode based on the second target speed and the second target power generation;

[0023] Wherein, the first target power generation is greater than the second target power generation.

[0024] In some embodiments, the first determination module is further configured to automatically switch to the pure electric mode when the power of the first vehicle drops to the second preset extended-range power.

[0025] In some embodiments, the extended-range mode includes the pure electric mode; and the second determination module is further configured to:

[0026] Acquiring an actual power generation corresponding to the first vehicle as a third target power generation corresponding to the pure electric mode;

[0027] determining a third target speed corresponding to a third target power generation based on an engine universal characteristic curve corresponding to the engine;

[0028] A third target torque is determined based on the third target rotation speed and the third target generated power.

[0029] In some embodiments, the extended-range mode includes the extreme pure electric mode; and the second determination module is further configured to:

[0030] determining a fourth target power generation power based on a charging power threshold and a power generation power threshold corresponding to the first vehicle;

[0031] determining a fourth target speed corresponding to a fourth target generated power based on an engine universal characteristic curve corresponding to the engine;

[0032] A fourth target torque is determined based on the fourth target rotation speed and the fourth target generated power.

[0033] In some embodiments, the extended range mode includes the automatic mode; and the second determination module is further configured to:

[0034] Acquire the current driving condition of the first vehicle;

[0035] When the driving road condition is a high-speed road condition, automatically determining that the first vehicle currently corresponds to the fuel mode;

[0036] When the driving road condition belongs to an urban road condition type and the distance between the first vehicle and the driving destination is greater than the pure electric range of the first vehicle, automatically determining that the first vehicle currently corresponds to the extreme pure electric mode;

[0037] When the driving road condition indicates that the first vehicle has arrived at the driving destination and the first vehicle has a corresponding need to continue driving, it is automatically determined that the first vehicle currently corresponds to the pure electric mode.

[0038] In some embodiments, the first determining module is further configured to:

[0039] Acquiring the driving road condition through a navigation system of the first vehicle;

[0040] In the event of a network connection failure of the navigation system, acquiring an environment image corresponding to the first vehicle in real time through a camera acquisition device of the first vehicle;

[0041] Identifying a speed limit sign in the environment image or infrastructure within a preset range of the first vehicle;

[0042] When the speed limit sign indicates that the driving speed interval of the area where the first vehicle is located belongs to a preset high-speed interval, determining that the driving road condition belongs to the high-speed road condition type;

[0043] When the speed limit sign indicates that the driving speed interval of the area where the first vehicle is located belongs to a preset low-speed interval, or when it is identified that the infrastructure belongs to a preset urban type facility, it is determined that the driving road condition belongs to the urban road condition type.

[0044] In some embodiments, the extended-range starting module is further configured to start the engine at the preset speed based on the extreme pure electric mode when the power of the first vehicle is less than a fourth preset extended-range power, and the fourth preset extended-range power is less than the third preset extended-range power;

[0045] The second determination module is further configured to determine a fifth target power generation power from a preset odometer based on the pure electric cruising distance, wherein the preset odometer includes a correspondence between the pure electric cruising distance and the target power generation power in the extreme pure electric mode;

[0046] The second determination module is further used to determine a fifth target speed corresponding to a fifth target power generation based on an engine universal characteristic curve corresponding to the engine;

[0047] The second determination module is further configured to determine a fifth target torque based on the fifth target rotational speed and the fifth target generated power.

[0048] On the other hand, a computer device is provided, comprising a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to implement a control method for a vehicle range extender as described in any of the above-mentioned embodiments of the present application.

[0049] On the other hand, a computer-readable storage medium is provided, wherein at least one instruction, at least one program, a code set or an instruction set is stored in the storage medium, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by a processor to implement a control method for a vehicle range extender as described in any of the above-mentioned embodiments of the present application.

[0050] On the other hand, a computer program product or a computer program is provided, the computer program product or the computer program comprising computer instructions, the computer instructions being stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the control method of the vehicle range extender described in any of the above embodiments.

[0051] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0052] It can automatically acquire different types of range-extending modes, start the range extender according to different range-extending power thresholds according to different types of range-extending modes, and determine the target torque of the engine according to the type of range-extending mode. It can adapt to complex driving conditions and changeable driving behaviors, flexibly determine different range-extending modes, and adopt different range-extending control methods for different range-extending modes. It can determine different power generation power, speed, torque, etc. for different range-extending modes, so as to flexibly optimize fuel consumption and battery use for different range-extending modes, ensure the vehicle's power and economy requirements, and improve the vehicle's range-extending control performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0054] Figure 1 is a schematic diagram of a computer system provided by an exemplary embodiment of the present application;

[0055] Figure 2 is a flow chart of a control method of a vehicle range extender provided by an exemplary embodiment of the present application;

[0056] Figure 3 is a schematic diagram of a universal characteristic curve of an engine provided by an exemplary embodiment of the present application;

[0057] Figure 4 is a schematic diagram of the structure of a vehicle control system provided by an exemplary embodiment of the present application;

[0058] Figure 5 is a structural block diagram of a control device for a vehicle range extender provided by an exemplary embodiment of the present application;

[0059] Figure 6 It is a structural block diagram of a terminal provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0060] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0061] It should be understood that although the terms first, second, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first parameter may also be referred to as the second parameter, and similarly, the second parameter may also be referred to as the first parameter. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0062] In the field of new energy vehicles, the start-stop control of the range extender is a key technology aimed at improving the energy efficiency and driving performance of the vehicle. With the enhancement of environmental awareness and the advancement of battery technology, the range extender electric vehicle, as a new type of clean energy vehicle, has gradually been favored by the market. This type of vehicle uses a small internal combustion engine as a range extender, which starts when the battery is low, charges the battery or directly drives the motor, thereby effectively solving the problem of short cruising range of pure electric vehicles. In the related art, for the start-stop control of the range extender, the start and stop time of the range extender is usually determined according to parameters such as the vehicle battery SOC, vehicle speed, and acceleration. For example, when the SOC drops to a preset threshold, the range extender is automatically started in a fixed manner to charge, and when the SOC rises to a higher level, the range extender stops working. However, the above method can only determine the start and stop time of the range extender, and it is difficult to adapt to complex driving conditions and changeable driving behaviors. In the process of starting the range extender, the fuel consumption and battery performance are low, and it is difficult to guarantee the power and economy requirements of the vehicle.

[0063] The control method of the vehicle range extender provided in the embodiment of the present application can automatically obtain different types of range extension modes, start the range extender according to different range extension power thresholds according to different types of range extension modes, and determine the target torque of the engine according to the type of range extension mode. It can adapt to complex driving conditions and changeable driving behaviors, flexibly determine different range extension modes, and adopt different range extension control methods for different range extension modes, so as to accurately control the speed of the engine and the generator for different range extension modes, which can not only improve the control accuracy and efficiency, but also flexibly optimize fuel consumption and battery use for different range extension modes, ensure the power and economy requirements of the vehicle, and improve the vehicle range extension control performance.

[0064] In addition, the method provided in the embodiment of the present application can dynamically adjust the control mode of the range extender by real-time detection and analysis of driver behavior, vehicle status and environmental conditions, so that the range extender always operates in the optimal fuel efficiency range; at the same time, it also combines noise (Noise), vibration (Vibration) and sound vibration roughness (Harshness) optimization, and reduces vehicle vibration and noise caused by starting the range extender by precisely controlling the speed of the engine and generator, thereby improving driving comfort.

[0065] First, the computer system of this application is introduced. Please refer to Figure 1 , which shows a schematic diagram of a computer system provided by an exemplary embodiment of the present application, wherein the computer system includes: a terminal device 10 and a server 20.

[0066] The terminal device 10 includes but is not limited to vehicle-mounted terminals, mobile phones, tablet computers, intelligent voice interaction devices, game consoles, wearable devices, multimedia playback devices, PCs (Personal Computers), smart home appliances and other electronic devices.

[0067] The terminal device 10 is a terminal device corresponding to the first vehicle. The terminal device 10 is installed with a target application, which is used to provide vehicle intelligent control functions. The driver in the first vehicle can control the first vehicle by operating the target application, for example, selecting the extended-range mode, controlling the on-board multimedia device, controlling the smart seat, selecting the driving mode, etc.

[0068] It is worth noting that the above-mentioned vehicle intelligent control function is only an illustrative example and is not limited to this in the embodiments of the present application.

[0069] Taking extended-range control as an example, the driver can select the vehicle's extended-range mode through any form of control operations such as interface control touch screen operation, physical button trigger operation, voice control operation, gesture command control operation, etc. The first vehicle can control the start and stop of the range extender according to the control method corresponding to the selected extended-range mode.

[0070] Among them, the extended-range mode is used to indicate the startup priority of the vehicle's range extender. The extended-range mode includes but is not limited to fuel mode, pure electric mode, and extreme pure electric mode.

[0071] The fuel mode is also called the fuel priority mode, that is, in the fuel mode, the range extender is started first to provide power and charge the battery; the pure electric mode is also called the pure electric priority mode, that is, in the pure electric mode, the vehicle uses battery power to drive the engine as much as possible to achieve zero-emission driving; the extreme pure electric mode, that is, avoid activating the range extender as much as possible and rely solely on battery power for driving.

[0072] The server 20 is used to provide background services for the target application, such as remote navigation, cloud big data computing, remote control, providing a background database, etc.

[0073] Illustratively, in a fleet control scenario, the server 20 can detect the vehicle status, driver behavior, driving environment, etc. of multiple vehicles in the fleet, and remotely instruct the vehicles to perform remote control such as extended-range mode.

[0074] It is worth noting that the background service content of the above-mentioned server 20 is only an example and is not limited to this embodiment of the present application.

[0075] The above-mentioned server can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers. It can also be a cloud server that provides basic cloud computing services such as cloud services, cloud security, cloud database, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content delivery network (Content Delivery Network, CDN), as well as big data and artificial intelligence platforms.

[0076] In some embodiments, the above server can also be implemented as a node in a blockchain system.

[0077] The terminal device 10 and the server 20 can communicate with each other via a network, which can be a wired network or a wireless network.

[0078] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.) and signals involved in this application are all authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of the relevant regions. For example, the vehicle status, driver behavior, driving environment, etc. involved in this application are all obtained with full authorization.

[0079] To further explain, before collecting relevant user data (for example, vehicle status, driver behavior, driving environment, etc. involved in this application) and during the process of collecting relevant user data, this application can display a prompt interface, pop-up window or output voice prompt information, and the prompt interface, pop-up window or voice prompt information is used to prompt the user that its relevant data is currently being collected, so that this application only starts to execute the relevant steps of obtaining user-related data after obtaining the user's confirmation operation on the prompt interface or pop-up window, otherwise (that is, when the user's confirmation operation on the prompt interface or pop-up window is not obtained), the relevant steps of obtaining user-related data are terminated, that is, the user's relevant data is not obtained. In other words, all user data collected by this application are collected with the user's consent and authorization, and the collection, use and processing of relevant user data need to comply with relevant laws, regulations and standards in the relevant regions.

[0080] For illustration, please refer to Figure 2 , which shows a flow chart of a control method for a vehicle range extender provided by an exemplary embodiment of the present application. The method can be executed by a terminal, or by a server, or by both a terminal and a server. The present application embodiment takes the method executed by a terminal as an example for explanation. Figure 2 As shown, the method comprises the following steps:

[0081] Step 210: automatically obtain the extended-range mode currently corresponding to the first vehicle.

[0082] The range-extending mode is used to indicate a starting priority of a vehicle range extender of the first vehicle, where the vehicle range extender includes an engine and a generator.

[0083] The first vehicle includes Extended-Range Electric Vehicles (EREV).

[0084] Optionally, the extended-range mode includes but is not limited to at least one of a fuel mode (fuel priority mode), a pure electric mode (pure electric priority mode), an extreme pure electric mode and an automatic mode.

[0085] The activation priorities of the vehicle range extender indicated by the fuel mode, pure electric mode, and extreme pure electric mode are arranged in descending order.

[0086] The automatic mode is used to control the extended-range mode of the first vehicle to automatically switch between the fuel mode, the pure electric mode and the extreme pure electric mode.

[0087] In fuel mode, the range extender is started first to provide power and charge the vehicle battery. It is suitable for long-distance driving or when the battery is low. It ensures that the vehicle has sufficient power and reduces dependence on the battery. It can improve fuel efficiency and reduce battery consumption.

[0088] In pure electric mode, battery power is used to drive the electric motor first, which can achieve zero-emission driving. It is suitable for urban driving or short-distance driving. When the battery is fully charged, the electric energy can be fully utilized. When the battery power drops to a preset threshold, the range extender can be automatically started to maintain driving.

[0089] The extreme pure electric mode is a more stringent electric drive mode. In the extreme pure electric mode, the range extender is avoided as much as possible, and the vehicle relies solely on battery power. It is suitable for use when the battery is sufficient and there is a need to minimize fuel consumption and emissions. The extreme pure electric mode may limit the vehicle's performance (such as acceleration capability) to save power, and the mileage will also be limited by the battery power.

[0090] Optionally, the extended-range mode may be set by a user, or may be automatically determined by the first vehicle based on at least one of a driving environment and a vehicle state.

[0091] Taking the extended-range mode as an example, the user can set the extended-range mode corresponding to the first vehicle through any form of control operation such as interface control touch screen operation, physical button trigger operation, voice control operation, gesture command control operation, etc.

[0092] Schematically, taking the touch screen operation of the interface control as an example, before the vehicle moves or during driving, the vehicle control interface is displayed through the vehicle's central control screen, or a mobile terminal with the first vehicle management authority, or any display device such as the seat smart display screen. The vehicle control interface includes extended-range mode controls such as fuel-range extended-range controls, pure electric-range extended-range controls, and extreme pure electric-range extended-range controls. The driver can trigger the corresponding extended-range mode through touch-screen operations on the extended-range mode controls.

[0093] In schematic form, taking the physical button trigger operation as an example, physical buttons corresponding to the extended-range mode can be set at preset positions of vehicle components such as the steering wheel, driver's seat, and inside the driver's door. The driver selects the corresponding extended-range mode by triggering the corresponding physical buttons. An extended-range joystick for selecting the extended-range mode can also be added to the center console. The driver selects the corresponding extended-range mode by placing the joystick in the gear position corresponding to the extended-range mode, etc.

[0094] Among them, different physical buttons can be set for different types of extended-range modes, or a unified extended-range physical button can be set to trigger different extended-range modes through different trigger operations. For example, pressing the extended-range button once within 5 seconds selects the fuel mode, pressing the extended-range button twice in a row within 5 seconds selects the pure electric mode, pressing the extended-range button three times in a row within 5 seconds selects the extreme pure electric mode, etc.

[0095] Illustratively, taking voice control operation as an example, the extended-range voice command is recognized by the vehicle-mounted intelligent voice device or mobile terminal, and the corresponding extended-range mode is selected. For example, the corresponding type of extended-range mode is triggered by automatically collecting the driver's voice commands and identifying relevant keywords of the extended-range mode.

[0096] Taking unmanned or automatic driving scenarios as an example, drivers can intervene in intelligent driving through voice commands to avoid physical control grabbing and traffic accidents. In order to avoid conflicts between voice commands among multiple drivers, the voiceprint features of the voice commands can be identified to distinguish the drivers who issue the voice commands, and intelligent driving can be intervened based on the voice commands of users with control authority.

[0097] Optionally, the occupancy status of the driver's seat is determined by the gravity sensor of the smart seat. When there is a driver in the driver's seat, the driver is determined as the driver, granted control authority, and the driver's voiceprint characteristics are collected, and effective extended-range control instructions are identified based on the voiceprint characteristics. When there is no driver in the driver's seat and there are multiple drivers in the vehicle, the driver who matches the preset voiceprint can be identified as a user with control authority based on the preset voiceprint library, and effective extended-range control instructions can be identified based on the voiceprint characteristics of the small car occupant. Artificial Intelligence (AI) can also be used to automatically initiate intelligent dialogue content to determine the user with control authority among multiple drivers. Facial recognition can also be used to identify the owner of the first vehicle as a user with control authority, and effective extended-range control instructions can be identified based on the owner's voiceprint characteristics, etc.

[0098] Schematically, taking gesture command control operation as an example, the driver's gesture command is collected by the infrared sensor or camera acquisition device corresponding to the first vehicle, and the extended-range mode type is determined based on the preset correspondence between the gesture command and the extended-range mode.

[0099] Taking an unmanned or automatic driving scenario as an example, when the first vehicle does not include a driver, facial recognition can be used to determine a user with control authority, and based on the seat position of the driver, an infrared sensor or camera acquisition device at a preset position can be used to collect the driver's gesture instructions, wherein there is a corresponding relationship between the seat position and the preset setting; or, after determining the user with control authority, the hand area of ​​the driver is automatically identified and tracked by a camera acquisition device, and the driver's gesture instructions are collected in real time.

[0100] Optionally, the user with control authority may be a driver in the first vehicle, a user who remotely controls the first vehicle through a server, or a driver in a second vehicle in the fleet where the first vehicle is located who has fleet management authority. This embodiment of the present application does not limit this.

[0101] It is worth noting that the above-mentioned setting operation of the extended-range mode is only an illustrative example and is not limited to this in the embodiments of the present application.

[0102] Taking the example that the extended-range mode is automatically determined by the vehicle control system, the vehicle control system can automatically determine the extended-range mode in at least one of the driving environment and the vehicle status. The driving environment includes but is not limited to the driving road condition currently located by the first vehicle, and the driving road condition is used to indicate the driving speed range of the area where the first vehicle is located. The vehicle status includes but is not limited to at least one of the remaining battery power of the vehicle, the vehicle speed, and the engine temperature.

[0103] Step 220 , when the power of the first vehicle is less than the preset extended-range power, the engine is started at a preset speed based on the extended-range mode.

[0104] The preset extended-range power is pre-set based on the type of extended-range mode.

[0105] When the power of the first vehicle is reduced to a preset range-extending power, the engine is started at a preset speed based on the range-extending mode.

[0106] The fuel mode corresponds to the first preset extended-range power (A1), the pure electric mode corresponds to the second extended-range power (A2), and the extreme pure electric mode corresponds to the third extended-range power (A3), among which the first preset extended-range power, the second preset extended-range power and the third preset extended-range power are arranged in order from high to low, that is, A1>A2>A3.

[0107] In some embodiments, the vehicle control system can automatically trigger different extended-range modes according to different preset extended-range power, and start at a preset speed based on the extended-range mode.

[0108] Optionally, the preset speeds corresponding to different types of extended-range modes may be the same or different, and this is not limited in the embodiments of the present application.

[0109] Schematically, taking the same preset speed (n1) as an example, when the battery power of the first vehicle is reduced to A1, the engine is started at the preset speed based on the fuel mode; when the battery power of the first vehicle is reduced to A2, the engine is started at the preset speed based on the pure electric mode; when the battery power of the first vehicle is reduced to A3, the engine is started at the preset speed based on the extreme pure electric mode.

[0110] The preset speed is determined based on the emission characteristics of the engine, and the emission characteristics of the engine are used to indicate the pollutant emission conditions (such as the pollutant emission amount) of the engine at different speeds.

[0111] When the engine is started at a preset speed, the emission characteristics of the engine meet the preset emission conditions.

[0112] Optionally, the preset emission conditions include but are not limited to at least one of the pollutant emission amount being less than a preset quantity threshold, the pollutant emission amount reaching a minimum emission amount based on a preset speed, and the pollutant emission frequency being lower than a preset frequency threshold.

[0113] Step 230 , determining a target speed of the engine and a target power generation of the generator according to the type of the range-extending mode, and determining a target torque of the engine in the range-extending mode based on the target speed and the target power generation.

[0114] In some embodiments, in different types of extended-range modes, the target speed and / or target power generation are determined in different ways.

[0115] Optionally, the target speed and / or target power generation may be determined based on the NVH of the first vehicle, or may be determined based on an engine universal characteristic curve corresponding to the engine of the first vehicle.

[0116] Among them, the engine universal characteristic curve is used to indicate the performance of the engine at different speeds or different loads. The performance indicators include but are not limited to torque, power generation, fuel consumption rate and emission characteristics.

[0117] Optionally, the engine universal characteristic curve is dependent on the engine type.

[0118] For illustration, please refer to Figure 3 , Figure 3 is a schematic diagram of an engine universal characteristic curve provided by an exemplary embodiment of the present application, such as Figure 3 As shown, for engine A, the engine universal characteristic curve 300 includes torque, performance parameters and power values ​​corresponding to engine A at different speeds, wherein the high-efficiency region 310 is used to determine the target speed and / or target power generation. When the engine meets the operating mode corresponding to the high-efficiency region 310, the range extender can provide the required power generation and torque at a lower fuel efficiency, and the range extension performance is higher.

[0119] When the range-extended mode includes a fuel mode, the target rotation speed and / or the target power generation power may be determined in different ways according to different vehicle speeds.

[0120] When the speed of the first vehicle is greater than a preset speed, the preset speed is determined as the first target speed, and the first target power generation corresponding to the first target speed is determined based on the engine universal characteristic curve corresponding to the engine, and the first target torque corresponding to the engine in fuel mode is determined based on the first target speed and the first target power generation.

[0121] In schematic form, the best power point corresponding to the first target speed (n1) of the engine is detected according to the engine universal characteristic curve as the first target power generation (P1). The first target torque is determined based on the first target speed and the first target power generation, as shown in the following formula 1:

[0122] Tq1=P1 / n1 formula 1,

[0123] Wherein, Tq1 is the first target torque, P1 is the first target power generation, and n1 is the first target rotation speed.

[0124] When the speed of the first vehicle is reduced to (less than or equal to) a preset speed, the second target power generation and the second target speed are determined according to the NVH of the first vehicle, and the second target torque corresponding to the engine in the fuel mode is determined based on the second target speed and the second target power generation.

[0125] The first target power generation is greater than the second target power generation.

[0126] Schematically, as the speed of the first vehicle decreases, the power generation is reduced to obtain a second target power generation (P2), and a second target speed (n2) is determined based on the second target power generation so that NVH meets the preset performance conditions. The second target torque is determined based on the second target speed and the second target power generation, please refer to the following formula 2:

[0127] Tq2=P2 / n2 formula 2,

[0128] Among them, Tq2 is the second target torque, P2 is the second target power generation power, and n2 is the second target speed.

[0129] Optionally, the preset performance condition includes but is not limited to at least one of noise, vibration and acoustic harshness generated by the first vehicle based on the second target speed being less than a preset performance parameter.

[0130] In some embodiments, a correlation table between the NVH of the whole vehicle and the speed can be preset to store the correspondence between NVH and the speed, so as to determine the target speed according to NVH.

[0131] When the first vehicle corresponds to the fuel mode, when the power of the first vehicle drops to the second preset extended-range power, it automatically switches to the pure electric mode.

[0132] The method provided in the embodiment of the present application can optimize the vehicle performance from different dimensions under different driving conditions by determining the target torque in different ways according to different vehicle speeds in the fuel mode. Among them, the target torque corresponding to the high-efficiency point determined based on the engine universal characteristic curve under high-speed conditions can optimize fuel economy and performance; the target torque corresponding to the power generation is reduced under low-speed conditions to reduce noise and vibration and improve driving comfort.

[0133] When the extended-range mode includes a pure electric mode, the target power generation can be determined based on the actual power generation of the vehicle.

[0134] The torque determination process in the pure electric mode includes obtaining the actual power generation corresponding to the first vehicle as the third target power generation (P3) corresponding to the pure electric mode, determining the third target speed (n3) corresponding to the third target power generation based on the engine universal characteristic curve corresponding to the engine; and determining the third target torque based on the third target speed and the third target power generation. Specifically, refer to the following formula 3:

[0135] Tq3=P3 / n3 formula 3,

[0136] Wherein, Tq3 is the third target torque, P3 is the third target power generation, and n3 is the third target speed. Optionally, the actual power generation includes at least one of vehicle drive power and vehicle load power.

[0137] The vehicle driving power is used to indicate the power required to drive the first vehicle based on the driver's operation through the accelerator pedal or other operations or the automatic driving system. The vehicle load power is used to indicate the power consumption of the on-board functions in the first vehicle, for example, the power consumed by vehicle components such as on-board air conditioning, lights, multimedia equipment, and smart seats.

[0138] In schematic form, when the first vehicle corresponds to the pure electric mode, when the power of the first vehicle is less than the second preset extended range power, the actual power generation is determined based on the sum of the vehicle drive power and the vehicle load power, and the actual power generation is used as the third target power generation corresponding to the pure electric mode. Specifically, refer to the following formula 4:

[0139] P3=P=P 驱动 +P 负载 Formula 4,

[0140] Among them, P3 is the third target power generation, P is the actual power generation, and P 驱动 is the vehicle driving power, P 负载 is the vehicle load power.

[0141] The method provided in the embodiment of the present application sets the actual power generation power to the target power generation power in the pure electric mode, so that the power generated by the range extender is just used to meet the current capacity requirements of the vehicle, avoiding excessive discharge or charging of the battery, thereby extending the service life of the battery and improving the energy utilization rate of the entire vehicle.

[0142] When the extended-range mode includes an extreme pure electric mode, the target power generation power can be determined based on the charging capacity of the vehicle battery.

[0143] The torque determination process in the extreme pure electric mode includes: determining the fourth target power generation (P4) based on the charging power threshold and the power generation threshold corresponding to the first vehicle; determining the fourth target speed (n4) corresponding to the fourth target power generation based on the engine universal characteristic curve corresponding to the engine; and determining the fourth target torque based on the fourth target speed and the fourth target power generation. Specifically, refer to the following formula 5:

[0144] Tq4=P4 / n4 formula 5,

[0145] Among them, Tq4 is the fourth target torque, P4 is the fourth target power generation power, and n4 is the fourth target speed.

[0146] The charging power threshold is used to indicate the maximum charging power that the vehicle battery can currently accept, which is related to the battery's charging status, temperature and battery health; the power generation threshold is used to indicate the maximum power that the generator can currently generate, which is related to the performance of the engine and generator.

[0147] Indicatively, when the first vehicle corresponds to the extreme pure electric mode, when the power of the first vehicle is less than the third preset extended range power, the fourth target power generation is determined based on the minimum power value of the charging power threshold and the power generation threshold. Specifically, the following formula 6 can be referred to:

[0148] P4=min(P 充 max,P 发 max) formula 6,

[0149] Among them, P4 is the fourth target power generation, P 充 max is the charging power threshold, P 发 max is the power generation threshold.

[0150] The method provided in the embodiment of the present application can ensure that the battery is charged at the maximum safe rate by determining the smaller value of the charging power threshold and the power generation power threshold as the fourth target power generation power. At the same time, the full available power of the generator is utilized to balance the battery charging and vehicle power requirements, ensuring that the battery power is effectively replenished while providing sufficient power, thereby improving the energy utilization efficiency of the entire vehicle.

[0151] When the extended-range mode includes the automatic mode, when the battery level of the first vehicle drops to A1, the fuel mode is automatically triggered; when the battery level of the first vehicle drops to A2, the pure electric mode is automatically triggered; when the battery level of the first vehicle drops to A3, the extreme pure electric mode is automatically triggered.

[0152] In some embodiments, in automatic mode, the vehicle control system can automatically determine the extended-range mode based on driving conditions.

[0153] The automatic determination process of the extended-range mode includes obtaining the current driving condition of the first vehicle, and automatically determining the current fuel mode of the first vehicle when the driving condition is a highway condition; automatically determining the current extreme pure electric mode of the first vehicle when the driving condition is an urban condition and the distance between the first vehicle and the driving destination is greater than the pure electric range of the first vehicle; and automatically determining the current pure electric mode of the first vehicle when the driving condition indicates that the first vehicle has reached the driving destination and the first vehicle has a need to continue driving.

[0154] Optionally, the current driving condition of the first vehicle may be acquired through at least one of the navigation system of the first vehicle or the environmental detection system of the first vehicle, and this embodiment of the present application is not limited to this.

[0155] In some embodiments, the driving road condition is acquired through the navigation system of the first vehicle; in the event that the network connection of the navigation system fails, the environmental image corresponding to the first vehicle is acquired in real time through the camera acquisition device of the first vehicle; the speed limit sign in the environmental image or the infrastructure within a preset range of the first vehicle is identified; when the speed limit sign indicates that the driving speed range in the area where the first vehicle is located belongs to a preset high-speed range, it is determined that the driving road condition belongs to the high-speed road condition type; when the speed limit sign indicates that the driving speed range in the area where the first vehicle is located belongs to a preset low-speed range, or when it is identified that the infrastructure belongs to a preset urban type facility, it is determined that the driving road condition belongs to the urban road condition type.

[0156] Illustratively, taking the environmental detection system of the first vehicle as an example, the environmental image can be captured by a camera capture device facing the outside of the vehicle. When a speed limit sign is identified in the captured environmental image, and the speed limit range indicated by the speed limit sign belongs to the preset high-speed range, it is determined that the current driving road condition belongs to the high-speed road condition type; when a speed limit sign is identified in the captured environmental image, and the speed limit range indicated by the speed limit sign belongs to the preset low-speed range, it is determined that the current driving road condition belongs to the urban road condition type, or, based on the environmental image, preset urban facilities such as sidewalks and buildings are detected within the preset range of the first vehicle.

[0157] It is worth noting that the above-mentioned method of determining the driving road condition is only an illustrative example and is not limited to this in the embodiments of the present application.

[0158] In some embodiments, after the extreme pure electric mode is triggered based on the automatic mode, when the power of the first vehicle is less than the fourth preset extended-range power, the engine is started at a preset speed based on the extreme pure electric mode, and the fourth preset extended-range power is less than the third preset extended-range power; the fifth target power generation (P5) is determined from a preset odometer based on the pure electric cruising range, and the preset odometer includes the correspondence between the pure electric cruising range and the target power generation in the extreme pure electric mode; the fifth target speed (n5) corresponding to the fifth target power generation is determined based on the engine universal characteristic curve corresponding to the engine; the fifth target torque is determined based on the fifth target speed and the fifth target power generation. Specifically, please refer to the following formula 7:

[0159] Tq5=P5 / n5 formula 7,

[0160] Among them, Tq5 is the fifth target torque, P5 is the fifth target power generation power, and n5 is the fifth target speed.

[0161] The above-mentioned pure electric cruising distance is used to indicate the distance that the first vehicle can travel continuously with the remaining power in the pure electric mode.

[0162] The method provided in the embodiment of the present application can further reduce the starting of the range extender in the extreme pure electric mode by setting a fourth preset extended-range power that is less than the third preset extended-range power, and start the range extender in advance based on the fourth preset extended-range power, thereby avoiding a poor driving experience caused by suddenly starting the range extender due to low power, realizing advance energy planning, and enabling the range extender to operate under more economical conditions, thereby improving the energy utilization efficiency of the entire vehicle.

[0163] Step 240: Control the engine to operate according to the target torque.

[0164] In some embodiments, the control method of the vehicle range extender provided in the embodiments of the present application is executed by a vehicle control system, which includes a vehicle controller and a range extender controller, wherein the range extender controller includes a generator controller and an engine controller.

[0165] Specifically, the vehicle controller obtains the extended-range mode of the first vehicle, determines that the power of the first vehicle is less than the preset extended-range power, instructs the generator controller to control the start of the generator, and the engine controller to control the start of the engine, and sends a start success message to the vehicle controller after the start is successful. The vehicle controller determines the target speed, target power generation and target torque based on the start success information, and sends the target torque to the engine controller for execution.

[0166] The vehicle controller and the range extender controller are connected in communication via a controller area network (CAN).

[0167] In some embodiments, when the battery power of the first vehicle is greater than a power threshold, or the battery limit charging power is less than a preset power threshold, the range extender is turned off, the engine is controlled to enter an OFF state, and the generator is controlled to enter an OFF state.

[0168] In some embodiments, the target power generation of the first vehicle is limited based on the vehicle range extender temperature.

[0169] Among them, the range extender temperature includes the engine temperature and the generator temperature.

[0170] Schematically, when the engine temperature is lower than the low temperature threshold (T1), the target power generation is limited (for example, the target power generation is reduced to a preset power generation, etc.) until the engine temperature rises to a first preset temperature threshold (T2), and the power limitation is released; when the engine temperature is higher than a first high temperature threshold (T3), the target power generation is limited until the engine temperature drops to T2, and the power limitation is released; when the generator temperature is higher than a second high temperature threshold (T4), the target power generation is limited until the generator temperature drops to a second preset temperature threshold (T5).

[0171] Among them, T1<T2<T3, T4<T5.

[0172] In summary, the method provided in the embodiment of the present application can automatically obtain different types of extended-range modes, start the range extender according to different extended-range power thresholds according to different types of extended-range modes, and determine the target torque of the engine according to the type of extended-range mode. It can adapt to complex driving conditions and changeable driving behaviors, flexibly determine different extended-range modes, and adopt different extended-range control methods for different extended-range modes, so as to accurately control the speed of the engine and the generator for different extended-range modes, which can not only improve the control accuracy and efficiency, but also flexibly optimize fuel consumption and battery usage for different extended-range modes, ensure the vehicle's power and economy requirements, and improve the vehicle's extended-range control performance.

[0173] In some embodiments, the vehicle range extender control method provided in the embodiments of the present application is executed by a vehicle control system, the vehicle control system includes a vehicle controller and a range extender controller, wherein the range extender controller includes a generator controller and an engine controller. Figure 4 , Figure 4 FIG. 1 is a schematic diagram of a vehicle control system structure provided by an exemplary embodiment of the present application. Figure 4As shown, the vehicle control system includes a right-domain control system (Vehicle Control Center Module, VCCM) 410, a drive motor and a motor controller (Motor Control Unit, MCU), an extended-range system 420, a power battery, a battery management system (Battery Management System, BMS), a left-domain control system (Zone Control Unit Left, ZCUL), a chassis control system (Integrated Electric Brake System, IEBS), a shift control mechanism (Electronic Transmission Range Selector, ETRS), an advanced driver-assistance system (ADAS), and an intelligent cockpit control system (Integrated Cockpit Management System, ICM).

[0174] VCCM is responsible for driver demand analysis, high voltage control, accessory management, energy management, thermal management, and gateway functions to communicate data with other control units via CAN.

[0175] The range extender system 420 includes an engine 401 and an integrated starter / generator (ISG) motor 402 mechanically connected to the engine, an engine management system (EMS) 421 for controlling the engine 401, and a generator control unit (GCU) 422 for controlling the generator 402. The GCU, the EMS, and the VCCM transmit data via CAN.

[0176] The ISG motor 402 is responsible for starting the engine and converting the kinetic energy of the engine into electrical energy for power generation.

[0177] The power battery and battery management system BMS are used to provide energy sources for the entire vehicle and drive motor. They are connected to the high voltage of the drive motor, and the battery management system is connected to the CAN control system of the right domain of the vehicle body.

[0178] The left domain control system of the vehicle body is responsible for window lifting and lowering control, vehicle opening and locking, seat control, etc.

[0179] The shift control mechanism ETRS is responsible for obtaining the driver's shift lever operation and sending the driver's requirements through CAN to the right-domain control system of the vehicle body to analyze the driver's gear requirements.

[0180] The intelligent cockpit domain control system includes instruments for displaying vehicle speed and alarm information, as well as a large-screen display system responsible for human-machine interaction information (Automotive Control Unit, ACU), which communicates with other control units via CAN.

[0181] The driver can set the start-up mode of the extended-range system on the large screen: fuel priority, pure electric priority, and extreme pure electric.

[0182] VCCM obtains the extended-range mode set by the driver through CAN, calculates the target power generation according to the vehicle status, controls the engine to operate in the optimal working range and drives the generator to generate electricity to ensure fuel economy as well as vehicle power and endurance.

[0183] VCCM monitors the fault level reported by the engine EMS and generator GCU in real time, and determines the power limit of power generation and customer vehicle reminder information based on the fault level.

[0184] VCCM monitors the temperature of the range-extending system fed back by the engine EMS and the generator GCU in real time. In low temperature conditions, the engine is warmed up or the power generation is limited. In high temperature conditions, the power generation is limited.

[0185] Specifically, when the engine temperature is lower than the low temperature threshold (T1), the target power generation is limited (for example, the target power generation is reduced to a preset power generation, etc.) until the engine temperature rises to a first preset temperature threshold (T2), and the power limitation is released; when the engine temperature is higher than a first high temperature threshold (T3), the target power generation is limited until the engine temperature drops to T2, and the power limitation is released; when the generator temperature is higher than a second high temperature threshold (T4), the target power generation is limited until the generator temperature drops to a second preset temperature threshold (T5).

[0186] Among them, T1<T2<T3, T4<T5.

[0187] For different range-extending modes, the target torque is determined in different ways. In combination with any embodiment corresponding to the above-mentioned vehicle control system and the above-mentioned vehicle range-extending control method, the control method for different range-extending modes is described, and the following A1>A2>A3.

[0188] (1) VCCM obtains the range-extending mode set by the driver through ICM in real time, when the acquired range-extending mode is the fuel mode.

[0189] When VCCM determines that the vehicle's battery power is less than A1, VCCM controls the target speed of the generator GCU to be n1 revolutions (this speed point is set according to the emission characteristics of the engine. Different from the starter of a gasoline vehicle, the ISG starter can start the engine at a high speed point, which is beneficial to emissions), starts the engine, and after the engine starts successfully, EMS feeds back the start success flag to VCCM.

[0190] VCCM detects the optimal power point of the engine as the target power generation power P1 according to the engine's universal characteristic curve.

[0191] Find the engine speed n1 corresponding to the high-efficiency point of the engine according to the engine's universal characteristic curve as the target speed of the generator, and request GCU to execute.

[0192] Calculate the engine torque Tq1 = P1 / n1.

[0193] VCCM sends the engine target torque Tq1 to EMS for execution through the CAN network.

[0194] When VCCM detects that the vehicle speed is less than the preset vehicle speed V, the target power generation power is set to the target value P2 (P2 < P1, considering the NVH of the vehicle, the power generation power is requested to be reduced when driving at low speed).

[0195] Set the engine speed n2 as the target speed of the generator according to the engine NVH, and request GCU to execute.

[0196] Calculate the engine torque Tq2 = P2 / n2.

[0197] VCCM sends the engine target torque Tq2 to EMS for execution through the CAN network.

[0198] When the battery power continues to drop to A2, switch to pure electric mode to calculate the target power.

[0199] Since the engine and the generator are mechanically connected coaxially, the generator is set to speed control and the engine is set to torque control because the generator can control the speed more stably;

[0200] When VCCM detects that the battery power is greater than the power threshold (Amax), or the battery's limited charging power is less than the preset power threshold (Pmin), turn off the range extender, control the engine to enter the off state, and control the generator to enter the off state.

[0201] The above fuel mode is applicable to high-speed working conditions.

[0202] (2) VCCM obtains the range extender mode set by the driver through ICM in real time. When the obtained range extender mode is pure electric mode.

[0203] VCCM determines that the vehicle power is less than A2, and VCCM controls the generator GCU to have a target speed of n1 (this speed point is set according to the emission characteristics of the engine. Different from the starter of a gasoline vehicle, the ISG starter can start the engine at a high speed point, which is beneficial to emissions), starts the engine, and the engine starts successfully. The EMS feeds back the start success flag to VCCM.

[0204] VCCM calculates the target power generation P3 = P consumption through the driver's power consumption (P consumption = P drive + P load) to maintain the vehicle's power consumption.

[0205] According to the engine universal characteristic curve, the engine's relatively efficient point corresponding to the engine speed n3 is found and used as the target speed of the generator, and the GCU is requested to execute it.

[0206] The engine torque Tq3=P3 / n3 is calculated.

[0207] VCCM sends the engine target torque Tq3 to EMS for execution via the CAN network.

[0208] Pure electric mode is suitable for urban conditions.

[0209] (3) VCCM obtains the extended-range mode set by the driver through ICM in real time, when the acquired extended-range mode is the extreme pure electric mode.

[0210] VCCM determines that the vehicle power is less than A3, VCCM controls the generator GCU target speed n1 (this speed point is set according to the emission characteristics of the engine. Different from the starter of a gasoline vehicle, the ISG starter can start the engine at a high speed point, which is beneficial to emissions), starts the engine, and the engine starts successfully. The EMS feeds back the start success flag to VCCM.

[0211] The maximum charging power P allowed by VCCM through the battery 充 max and the maximum power generated by the generator P 发 max calculates the target power generation P4 = min (P 充 max,P 发 max), ensuring that the vehicle's power is replenished to meet the vehicle's driving needs.

[0212] According to the engine universal characteristic curve, the engine's relatively efficient point corresponding to the engine speed n4 is found and used as the target speed of the generator, and the GCU is requested to execute it.

[0213] The engine torque Tq4=P4 / n4 is calculated.

[0214] VCCM sends the engine target torque Tq4 to EMS for execution via the CAN network.

[0215] The extreme pure electric mode is suitable for short-distance driving.

[0216] (4)VCCM obtains the extended-range mode set by the driver through the ICM in real time. When the obtained extended-range mode is the automatic mode.

[0217] VCCM judges that the whole vehicle is driving on the highway according to the current driver's driving map fed back by the ICM.

[0218] VCCM judges that the power of the whole vehicle is less than A1. VCCM controls the target speed of the generator GCU to be n1 revolutions (this speed point is set according to the emission characteristics of the engine. Different from the starter of a gasoline vehicle, the ISG starter can start the engine at a high speed point, which is beneficial to emissions), starts the engine, and the engine sends a successful start flag to VCCM after successful start.

[0219] According to the engine universal characteristic curve, find the engine efficient point corresponding to the engine speed n1 and use it as the target speed of the generator in turn, and request the GCU to execute.

[0220] Calculate the engine torque Tq1 = P1 / n1.

[0221] VCCM sends the engine target torque Tq1 to the EMS for execution through the CAN network.

[0222] When VCCM detects that the vehicle speed is less than the preset vehicle speed V, the target power generation power is set to the target value P2 (P2 < P1, considering the NVH of the whole vehicle, the power generation power is requested to be reduced at low speed).

[0223] According to the engine NVH, set the engine speed n2 as the target speed of the generator, and request the GCU to execute.

[0224] Calculate the engine torque Tq2 = P2 / n2.

[0225] VCCM sends the engine target torque Tq2 to the EMS for execution through the CAN network.

[0226] VCCM detects the best power point of the engine according to the engine universal characteristic curve as the target power generation power P1.

[0227] When the power continues to drop to A2, switch to the pure electric mode to calculate the target power.

[0228] Because the engine and the generator are mechanically connected coaxially, the generator control speed is more stable. Therefore, the generator is set to speed control and the engine is set to torque control.

[0229] When VCCM detects that the battery power > Amax or the battery limited charging power < Pmin, request the engine to enter the OFF state and the generator to enter the OFF state.

[0230] Based on the current driver's driving map feedback by ICM, VCCM determines that the driving condition of the whole vehicle is an urban condition, and the distance to the destination is greater than the pure electric driving range.

[0231] VCCM determines that the battery level of the whole vehicle is less than A4, (A4 < A3) VCCM controls the target speed of the generator GCU to n1 revolutions (this speed point is set according to the emission characteristics of the engine. Different from the starter of a gasoline vehicle, the ISG starter can start the engine at a high speed point, which is beneficial to emissions), starts the engine, and after the engine starts successfully, EMS feeds back the start success flag bit to VCCM.

[0232] VCCM obtains the target power generation power P5 by looking up the table according to the remaining driving range, and searches for the engine speed n5 corresponding to the relatively efficient point of the engine according to the engine universal characteristic curve as the target speed of the generator in turn, and requests GCU to execute.

[0233] Calculate the engine torque Tq5 = P5 / n5.

[0234] VCCM sends the engine target torque Tq5 to EMS for execution through the CAN network.

[0235] After VCCM detects that the driver still has a driving demand after reaching the destination, VCCM calculates the target power generation power P3 = P consumption (P consumption = P drive + P load) through the power consumed by the driver to maintain the battery level of the whole vehicle.

[0236] Search for the engine speed n3 corresponding to the relatively efficient point of the engine according to the engine universal characteristic curve as the target speed of the generator in turn, and request GCU to execute.

[0237] Calculate the engine torque Tq3 = P3 / n3.

[0238] VCCM sends the engine target torque Tq3 to EMS for execution through the CAN network.

[0239] (5) VCCM obtains the temperature and fault status of the range extender system in real time.

[0240] When VCCM obtains that the engine temperature fed back by EMS is < the set value T1, VCCM limits the power generation power until the engine temperature reaches the set value T2 and no longer limits the power generation power.

[0241] When VCCM obtains that the engine temperature fed back by EMS is > the set value T3, VCCM limits the power generation power until the engine temperature reaches the set value T2 and no longer limits the power generation power.

[0242] Among them, T1 < T2 < T3.

[0243] When the generator temperature fed back by the GCU obtained by VCCM is greater than the set value T4, VCCM limits the power generation until the generator temperature reaches the set value T5, and then no longer limits the power generation, T4<T5.

[0244] To sum up, the system provided in the embodiment of the present application provides a variety of extended-range modes for users to choose from, which can meet a variety of different driving needs; in a specific mode, it can intelligently control the start and stop points of the engine, as well as the target power generation power, to reduce fuel consumption power; comprehensively consider the vehicle's power requirements and economic requirements, while taking into account NVH, to improve driving comfort.

[0245] Figure 5 is a structural block diagram of a control device for a vehicle range extender provided by an exemplary embodiment of the present application, such as Figure 5 As shown, the device includes the following parts:

[0246] A first determination module 510 is used to automatically obtain a range-extending mode currently corresponding to a first vehicle, the range-extending mode being used to indicate a start priority of a vehicle range extender of the first vehicle, the vehicle range extender including an engine and a generator;

[0247] An extended-range starting module 520, configured to start the engine at a preset speed based on the extended-range mode when the power of the first vehicle is less than a preset extended-range power, wherein the preset extended-range power is pre-set based on the type of the extended-range mode;

[0248] A second determination module 530 is used to determine target speeds corresponding to the engine and the generator, and a target power generation corresponding to the generator according to the type of the range-extending mode, and to determine a target torque corresponding to the engine in the range-extending mode based on the target speed and the target power generation;

[0249] The range extension control module 540 is used to control the engine to operate according to the target torque.

[0250] In some embodiments, the extended range mode includes at least one of a fuel mode, a pure electric mode, an extreme pure electric mode, and an automatic mode;

[0251] The start priorities indicated by the fuel mode, the pure electric mode and the extreme pure electric mode are arranged in descending order;

[0252] The automatic mode is used to control the range-extended mode of the first vehicle to automatically switch between the fuel mode, the pure electric mode and the extreme pure electric mode;

[0253] The fuel mode corresponds to a first preset extended-range power, the pure electric mode corresponds to a second preset extended-range power, and the extreme pure electric mode corresponds to a third preset extended-range power, wherein the first preset extended-range power, the second preset extended-range power and the third preset extended-range power are arranged in order from high to low.

[0254] In some embodiments, the extended range mode includes the fuel mode; the second determination module 530 is further configured to:

[0255] In the case where the speed of the first vehicle is greater than a preset speed, the preset speed is determined as a first target speed, and a first target power generation corresponding to the first target speed is determined based on an engine universal characteristic curve corresponding to the engine; a first target torque corresponding to the engine in the fuel mode is determined based on the first target speed and the first target power generation;

[0256] When the speed of the first vehicle is less than a preset speed, determining a second target power generation and a second target speed according to the noise, vibration and harshness (NVH) of the first vehicle; determining a second target torque corresponding to the engine in the fuel mode based on the second target speed and the second target power generation;

[0257] Wherein, the first target power generation is greater than the second target power generation.

[0258] In some embodiments, the first determination module 510 is further configured to automatically switch to the pure electric mode when the power of the first vehicle drops to the second preset extended-range power.

[0259] In some embodiments, the extended range mode includes the pure electric mode; the second determination module 530 is further configured to:

[0260] Acquiring an actual power generation corresponding to the first vehicle as a third target power generation corresponding to the pure electric mode;

[0261] determining a third target speed corresponding to a third target power generation based on an engine universal characteristic curve corresponding to the engine;

[0262] A third target torque is determined based on the third target rotation speed and the third target generated power.

[0263] In some embodiments, the extended range mode includes the extreme pure electric mode; the second determination module 530 is further configured to:

[0264] determining a fourth target power generation power based on a charging power threshold and a power generation power threshold corresponding to the first vehicle;

[0265] determining a fourth target speed corresponding to a fourth target generated power based on an engine universal characteristic curve corresponding to the engine;

[0266] A fourth target torque is determined based on the fourth target rotation speed and the fourth target generated power.

[0267] In some embodiments, the extended range mode includes the automatic mode; the second determination module 530 is further configured to:

[0268] Acquire the current driving condition of the first vehicle;

[0269] When the driving road condition is a high-speed road condition, automatically determining that the first vehicle currently corresponds to the fuel mode;

[0270] When the driving road condition belongs to an urban road condition type and the distance between the first vehicle and the driving destination is greater than the pure electric range of the first vehicle, automatically determining that the first vehicle currently corresponds to the extreme pure electric mode;

[0271] When the driving road condition indicates that the first vehicle has arrived at the driving destination and the first vehicle has a corresponding need to continue driving, it is automatically determined that the first vehicle currently corresponds to the pure electric mode.

[0272] In some embodiments, the first determining module 510 is further configured to:

[0273] Acquiring the driving road condition through a navigation system of the first vehicle;

[0274] In the event of a network connection failure of the navigation system, acquiring an environment image corresponding to the first vehicle in real time through a camera acquisition device of the first vehicle;

[0275] Identifying a speed limit sign in the environment image or infrastructure within a preset range of the first vehicle;

[0276] When the speed limit sign indicates that the driving speed interval of the area where the first vehicle is located belongs to a preset high-speed interval, determining that the driving road condition belongs to the high-speed road condition type;

[0277] When the speed limit sign indicates that the driving speed interval of the area where the first vehicle is located belongs to a preset low-speed interval, or when it is identified that the infrastructure belongs to a preset urban type facility, it is determined that the driving road condition belongs to the urban road condition type.

[0278] In some embodiments, the extended-range starting module 520 is further configured to start the engine at the preset speed based on the extreme pure electric mode when the power of the first vehicle is less than a fourth preset extended-range power, and the fourth preset extended-range power is less than the third preset extended-range power;

[0279] The second determination module 530 is further configured to determine a fifth target power generation power from a preset odometer based on the pure electric cruising distance, wherein the preset odometer includes a correspondence between the pure electric cruising distance and the target power generation power in the extreme pure electric mode;

[0280] The second determination module 530 is further configured to determine a fifth target rotational speed corresponding to a fifth target generated power based on an engine universal characteristic curve corresponding to the engine;

[0281] The second determination module 530 is further configured to determine a fifth target torque based on the fifth target rotational speed and the fifth target generated power.

[0282] In summary, the device provided in the embodiment of the present application can automatically obtain different types of extended-range modes, start the range extender according to different extended-range power thresholds according to different types of extended-range modes, and determine the target torque of the engine according to the type of extended-range mode. It can adapt to complex driving conditions and changeable driving behaviors, flexibly determine different extended-range modes, and adopt different extended-range control methods for different extended-range modes, so as to accurately control the speed of the engine and the generator for different extended-range modes, which can not only improve the control accuracy and efficiency, but also flexibly optimize fuel consumption and battery usage for different extended-range modes, ensure the vehicle's power and economy requirements, and improve the vehicle's extended-range control performance.

[0283] It should be noted that the control device of the vehicle range extender provided in the above embodiment is only illustrated by the division of the above functional modules. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0284] Figure 6 The structure block diagram of a terminal 600 provided by an exemplary embodiment of the present application is shown. The terminal 600 may be: a smart phone, a tablet computer, an MP3 player, an MP4 player, a notebook computer or a desktop computer. The terminal 600 may also be called a user equipment, a portable terminal, a laptop terminal, a desktop terminal or other names.

[0285] Typically, the terminal 600 includes a processor 601 and a memory 602 .

[0286] The processor 601 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 601 may be implemented in at least one hardware form of digital signal processing (DSP), field-programmable gate array (FPGA), and programmable logic array (PLA). The processor 601 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a central processing unit (CPU); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 601 may be integrated with a graphics processing unit (GPU), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 601 may also include an artificial intelligence (AI) processor, which is used to process computing operations related to machine learning.

[0287] The memory 602 may include one or more computer-readable storage media, which may be non-transitory. The memory 602 may also include a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In some embodiments, the non-transitory computer-readable storage medium in the memory 602 is used to store at least one instruction, which is used to be executed by the processor 601 to implement the control method of the vehicle range extender provided in the method embodiment of the present application.

[0288] In some embodiments, the terminal 600 further includes some other components 603, and the type and quantity of the other components 603 can be selected based on the functional requirements of the terminal 600. Those skilled in the art will appreciate that Figure 6 The structure shown in the figure does not constitute a limitation on the terminal 600, and the terminal 600 may include more or less components than those shown in the figure, or combine some components, or adopt a different component arrangement.

[0289] The embodiment of the present application also provides a computer device, which can be implemented as follows: Figure 1 The computer device includes a processor and a memory, wherein at least one instruction, at least one program, code set or instruction set is stored in the memory, and the at least one instruction, at least one program, code set or instruction set is loaded and executed by the processor to implement the vehicle range extender control method provided by the above-mentioned method embodiments.

[0290] An embodiment of the present application also provides a computer-readable storage medium, on which is stored at least one instruction, at least one program, code set or instruction set, and the at least one instruction, at least one program, code set or instruction set is loaded and executed by a processor to implement the vehicle range extender control method provided in the above-mentioned method embodiments.

[0291] The embodiments of the present application also provide a computer program product or a computer program, which includes computer instructions stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the vehicle range extender control method provided by the above-mentioned method embodiments.

[0292] Optionally, the computer readable storage medium may include: Read Only Memory (ROM), Random Access Memory (RAM), Solid State Drives (SSD) or optical disks, etc. Among them, the random access memory may include resistance random access memory (ReRAM) and dynamic random access memory (DRAM). The serial numbers of the above embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments.

[0293] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0294] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A control method for a vehicle range extender, characterized in that: The method comprises: Automatically acquiring a range-extending mode currently corresponding to a first vehicle, the range-extending mode being used to indicate a start priority of a vehicle range extender of the first vehicle, the vehicle range extender including an engine and a generator; When the power of the first vehicle is less than a preset range-extending power, starting the engine at a preset speed based on the range-extending mode, wherein the preset range-extending power is pre-set based on the type of the range-extending mode; Determining a target speed corresponding to the engine and a target power generation corresponding to the generator according to the type of the range-extending mode, and determining a target torque corresponding to the engine in the range-extending mode based on the target speed and the target power generation; The engine is controlled to operate according to the target torque.

2. The method according to claim 1, characterized in that: The extended range mode includes at least one of a fuel mode, a pure electric mode, an extreme pure electric mode and an automatic mode; The start priorities indicated by the fuel mode, the pure electric mode and the extreme pure electric mode are arranged in descending order; The automatic mode is used to control the range-extended mode of the first vehicle to automatically switch between the fuel mode, the pure electric mode and the extreme pure electric mode; The fuel mode corresponds to a first preset extended-range power, the pure electric mode corresponds to a second preset extended-range power, and the extreme pure electric mode corresponds to a third preset extended-range power, wherein the first preset extended-range power, the second preset extended-range power and the third preset extended-range power are arranged in order from high to low.

3. The method according to claim 2, characterized in that The extended range mode includes the fuel mode; The step of determining target speeds corresponding to the engine and the generator and target power generation corresponding to the generator according to the type of the range-extending mode, and determining a target torque corresponding to the engine in the range-extending mode based on the target speed and the target power generation includes: In the case where the speed of the first vehicle is greater than a preset speed, the preset speed is determined as a first target speed, and a first target power generation corresponding to the first target speed is determined based on an engine universal characteristic curve corresponding to the engine; a first target torque corresponding to the engine in the fuel mode is determined based on the first target speed and the first target power generation; When the speed of the first vehicle is less than a preset speed, determining a second target power generation and a second target speed according to the noise, vibration and harshness (NVH) of the first vehicle; determining a second target torque corresponding to the engine in the fuel mode based on the second target speed and the second target power generation; Wherein, the first target power generation is greater than the second target power generation.

4. The method according to claim 3, characterized in that The method further comprises: When the power of the first vehicle drops to the second preset extended-range power, it automatically switches to the pure electric mode.

5. The method according to claim 2, characterized in that: The extended-range mode includes the pure electric mode; The step of determining target speeds corresponding to the engine and the generator and target power generation corresponding to the generator according to the type of the range-extending mode, and determining a target torque corresponding to the engine in the range-extending mode based on the target speed and the target power generation includes: Acquiring an actual power generation corresponding to the first vehicle as a third target power generation corresponding to the pure electric mode; determining a third target speed corresponding to a third target power generation based on an engine universal characteristic curve corresponding to the engine; A third target torque is determined based on the third target rotation speed and the third target generated power.

6. The method according to claim 2, characterized in that The extended-range mode includes the extreme pure electric mode; The step of determining target speeds corresponding to the engine and the generator and target power generation corresponding to the generator according to the type of the range-extending mode, and determining a target torque corresponding to the engine in the range-extending mode based on the target speed and the target power generation includes: determining a fourth target power generation power based on a charging power threshold and a power generation power threshold corresponding to the first vehicle; determining a fourth target speed corresponding to a fourth target generated power based on an engine universal characteristic curve corresponding to the engine; A fourth target torque is determined based on the fourth target rotation speed and the fourth target generated power.

7. The method according to claim 2, characterized in that The extended range mode includes the automatic mode; The automatically acquiring the range-extended mode currently corresponding to the first vehicle includes: Acquire the current driving condition of the first vehicle; When the driving road condition is a high-speed road condition, automatically determining that the first vehicle currently corresponds to the fuel mode; When the driving road condition belongs to an urban road condition type and the distance between the first vehicle and the driving destination is greater than the pure electric range of the first vehicle, automatically determining that the first vehicle currently corresponds to the extreme pure electric mode; When the driving road condition indicates that the first vehicle has arrived at the driving destination and the first vehicle has a corresponding need to continue driving, it is automatically determined that the first vehicle currently corresponds to the pure electric mode.

8. The method according to claim 7, characterized in that The obtaining of the current driving condition of the first vehicle includes: Acquiring the driving road condition through a navigation system of the first vehicle; In the event of a network connection failure of the navigation system, acquiring an environment image corresponding to the first vehicle in real time through a camera acquisition device of the first vehicle; Identifying a speed limit sign in the environment image or infrastructure within a preset range of the first vehicle; When the speed limit sign indicates that the driving speed interval of the area where the first vehicle is located belongs to a preset high-speed interval, determining that the driving road condition belongs to the high-speed road condition type; When the speed limit sign indicates that the driving speed interval of the area where the first vehicle is located belongs to a preset low-speed interval, or when it is identified that the infrastructure belongs to a preset urban type facility, it is determined that the driving road condition belongs to the urban road condition type.

9. A control device for a vehicle range extender, characterized in that: The device comprises: A first determination module is used to automatically obtain a range-extending mode currently corresponding to a first vehicle, wherein the range-extending mode is used to indicate a start priority of a vehicle range extender of the first vehicle, wherein the vehicle range extender includes an engine and a generator; an extended-range starting module, configured to start the engine at a preset speed based on the extended-range mode when the power of the first vehicle is less than a preset extended-range power, wherein the preset extended-range power is pre-set based on the type of the extended-range mode; a second determination module, configured to determine target speeds corresponding to the engine and the generator, and a target power generation corresponding to the generator according to the type of the range-extending mode, and determine a target torque corresponding to the engine in the range-extending mode based on the target speed and the target power generation; The range-extending control module is used to control the engine according to the target torque.

10. A computer device, characterized in that: The computer device includes a processor and a memory, wherein the memory stores at least one computer program, and the at least one computer program is loaded and executed by the processor to implement the control method of the vehicle range extender according to any one of claims 1 to 8.

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