Vehicle, engine control method and device thereof, storage medium and vehicle control unit

Abstract

The invention discloses a vehicle, an engine control method and device of the vehicle, a storage medium and a whole vehicle controller, the vehicle comprises a range extender, an engine is applied to the range extender, the range extender further comprises a generator, and the starting control method of the vehicle engine comprises the steps that when the vehicle meets the range extending requirement, the starting target rotating speed and the ignition rotating speed of the engine are obtained; and controlling the generator to drag the engine to perform multi-stage acceleration according to the starting target rotating speed and the ignition rotating speed until the rotating speed of the engine is the starting target rotating speed. Therefore, the rotating speed of the engine can quickly reach the ignition rotating speed and slowly rise to the highest starting rotating speed, so that the starting efficiency is improved, the starting smoothness is improved, the noise, vibration and sound vibration roughness performance of the whole vehicle is effectively improved, and more comfortable and cheerful driving experience is brought to a driver.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle engine control, and in particular to a vehicle engine start control method, a computer-readable storage medium, a vehicle engine start control device, a vehicle controller and a vehicle. Background Art

[0002] In recent years, with the increasing global awareness of environmental protection and the transformation of energy structure, the new energy vehicle market has ushered in unprecedented development opportunities. Among them, extended-range electric vehicles, as a transitional technology between traditional fuel vehicles and pure electric vehicles, have gradually become the focus of market attention due to their advantages of long range, low emissions and flexible energy replenishment. Extended-range technology uses a small and efficient engine as a range extender, which automatically starts when the battery is low to charge the battery or directly drive the motor, thereby extending the vehicle's mileage and effectively solving the range anxiety problem of pure electric vehicles.

[0003] In the technical system of extended-range vehicles, the engine start-stop control technology is one of the core key technologies, and its performance is directly related to the comfort, fuel economy, emission level and service life of the engine components of the whole vehicle. In the related technology, the engine start process of the extended-range vehicle usually relies on the vehicle controller to send a torque control command to the generator controller, and the generator drags the engine to a speed close to the idle speed. Then, after the engine reaches the injection speed, it performs the injection ignition operation, enters the idle state, and completes the start process. However, the engine is prone to speed surge during the startup process, resulting in poor startup smoothness, which in turn causes the vehicle NVH (Noise, Vibration, Harshness) performance to deteriorate, affecting the passengers' riding experience. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the first purpose of the present invention is to provide a vehicle engine start control method, which can make the engine speed quickly reach the ignition speed and rise smoothly to the maximum start speed, thereby improving the start efficiency and start smoothness, and effectively improving the noise, vibration and sound vibration harshness performance of the whole vehicle, bringing a more comfortable and pleasant driving experience to the driver.

[0005] A second object of the present invention is to provide a computer-readable storage medium.

[0006] A third object of the present invention is to provide a starting control device for a vehicle engine.

[0007] A fourth objective of the present invention is to provide a vehicle controller.

[0008] A fifth object of the present invention is to provide a vehicle.

[0009] In order to achieve the above-mentioned purpose, an embodiment of the first aspect of the present invention proposes a vehicle engine start-up control method, wherein the vehicle includes a range extender, the engine is applied to the range extender, and the range extender also includes a generator. The method includes: when the vehicle meets the range extension requirement, obtaining the start-up target speed and the ignition speed of the engine; according to the start-up target speed and the ignition speed, controlling the generator to drag the engine to perform multiple accelerations until the speed of the engine reaches the start-up target speed.

[0010] According to the engine starting control method of the embodiment of the present invention, when the vehicle meets the range extension requirement, the starting target speed and ignition speed of the engine are obtained, and then the generator is controlled to drag the engine for multiple accelerations according to the starting target speed and the ignition speed, until the engine speed reaches the starting target speed. As a result, the engine speed can quickly reach the ignition speed and smoothly rise to the maximum starting speed, thereby improving the starting efficiency and starting smoothness, and effectively improving the noise, vibration and acoustic roughness performance of the whole vehicle, bringing a more comfortable and pleasant driving experience to the driver.

[0011] In addition, the vehicle engine startup control method according to the above embodiment of the present invention may also include the following additional technical features:

[0012] According to one embodiment of the present invention, the method includes: when the vehicle starts the extended-range mode or the power battery of the vehicle is less than a preset power level, determining that the vehicle meets the extended-range requirement.

[0013] According to one embodiment of the present invention, controlling the generator to drag the engine to perform multi-stage acceleration according to the starting target speed and the ignition speed includes: determining a first preset speed according to the ignition speed, and determining a second preset speed according to the starting target speed; controlling the engine speed to increase from zero to the first preset speed at a first preset speed slope; controlling the engine speed to increase from the first preset speed to the second preset speed at a second preset speed slope.

[0014] According to an embodiment of the present invention, the first preset speed slope is greater than the second preset speed slope.

[0015] According to an embodiment of the present invention, before acquiring the startup target speed of the engine, the method further includes: sending a speed control instruction to the range extender to enable the range extender to enter a speed control mode.

[0016] According to an embodiment of the present invention, the method further includes: when the speed of the engine is the start target speed, determining that the engine is in an idle state; and sending a torque control instruction to the range extender to enable the range extender to enter a torque control mode.

[0017] In order to achieve the above-mentioned purpose, the second aspect of the present invention proposes a computer-readable storage medium on which a vehicle engine startup control program is stored. When the vehicle engine startup control program is executed by a processor, the vehicle engine startup control method of the aforementioned embodiment of the present invention is implemented.

[0018] According to the computer-readable storage medium of an embodiment of the present invention, by executing the starting control program of the vehicle engine through the processor, the engine speed can quickly reach the ignition speed and smoothly rise to the maximum starting speed, thereby improving the starting efficiency and the starting smoothness, and effectively improving the noise, vibration and sound roughness performance of the whole vehicle, bringing a more comfortable and pleasant driving experience to the driver.

[0019] In order to achieve the above-mentioned purpose, the third aspect of the present invention proposes a starting control device for a vehicle engine, wherein the vehicle includes a range extender, the engine is applied to the range extender, and the range extender also includes a generator. The device includes: an acquisition module, which is used to obtain the starting target speed and ignition speed of the engine when the vehicle meets the range extension requirement; a control module, which is used to control the generator to drag the engine to perform multiple accelerations according to the starting target speed and the ignition speed until the speed of the engine is the starting target speed.

[0020] According to the starting control device of the vehicle engine of the embodiment of the present invention, when the vehicle meets the range extension requirement, the starting target speed and the ignition speed of the engine are obtained through the acquisition module, and then the generator is controlled by the control module to drag the engine for multiple accelerations according to the starting target speed and the ignition speed, until the engine speed reaches the starting target speed. As a result, the engine speed can quickly reach the ignition speed and rise smoothly to the maximum starting speed, thereby improving the starting efficiency and the starting smoothness, and effectively improving the noise, vibration and acoustic roughness performance of the whole vehicle, bringing a more comfortable and pleasant driving experience to the driver.

[0021] In order to achieve the above-mentioned purpose, a fourth aspect of the present invention proposes a vehicle controller, including the vehicle engine starting control device of the aforementioned embodiment of the present invention.

[0022] According to the vehicle controller of the embodiment of the present invention, by adopting the starting control device of the vehicle engine of the above-mentioned embodiment of the present invention, the engine speed can quickly reach the ignition speed and smoothly rise to the maximum starting speed, thereby improving the starting efficiency and the starting smoothness, and effectively improving the noise, vibration and sound roughness performance of the whole vehicle, bringing a more comfortable and pleasant driving experience to the driver.

[0023] In order to achieve the above-mentioned purpose, a fifth aspect of the present invention proposes a vehicle, including the vehicle controller of the aforementioned embodiment of the present invention.

[0024] According to the vehicle of the embodiment of the present invention, by adopting the vehicle controller of the above-mentioned embodiment of the present invention, the engine speed can quickly reach the ignition speed and smoothly rise to the maximum starting speed, thereby improving the starting efficiency and the starting smoothness, and effectively improving the noise, vibration and sound roughness performance of the whole vehicle, bringing a more comfortable and pleasant driving experience to the driver.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a flow chart of a vehicle engine startup control method according to one embodiment of the present invention;

[0027] Figure 2 is a flow chart of a vehicle engine startup control method according to another embodiment of the present invention;

[0028] Figure 3 is a schematic diagram of the rotational speed coordinates of an engine according to an embodiment of the present invention;

[0029] Figure 4 is a flow chart of a vehicle engine startup control method according to another embodiment of the present invention;

[0030] Figure 5 is a block diagram of a vehicle engine start control device according to an embodiment of the present invention;

[0031] Figure 6 is a block diagram of a vehicle controller according to an embodiment of the present invention;

[0032] Figure 7 is a block diagram of a vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0034] The following describes a vehicle engine startup control method, a computer-readable storage medium, a vehicle engine startup control device, a vehicle controller, and a vehicle according to embodiments of the present invention with reference to the accompanying drawings.

[0035] Figure 1 1 is a flow chart of a method for starting a vehicle engine according to an embodiment of the present invention.

[0036] Specifically, in some embodiments of the present invention, the vehicle includes a range extender, the engine is applied to the range extender, and the range extender also includes a generator, such as Figure 1 As shown, the vehicle engine start control method includes:

[0037] S101, when the vehicle meets the range extension requirement, obtaining the engine start target speed and ignition speed.

[0038] Specifically, in this embodiment, when the vehicle starts the extended-range mode or the vehicle's power battery is less than a preset power level, it is determined that the vehicle meets the extended-range requirement, and then when the vehicle meets the extended-range requirement, the engine's starting target speed and ignition speed are obtained, wherein the starting target speed is determined through a large number of tests and calibrations during the vehicle design phase, and is stored in the vehicle controller or the engine control system after determination, and then the engine's starting target speed can be obtained from the vehicle controller or the engine control system, and the ignition speed is the lowest speed at which the engine can stably burn and output power, which is determined through engine design and calibration, and stored in the engine management system, and then the ignition speed can be obtained through the engine management system.

[0039] S102, controlling the generator to drive the engine to perform multiple accelerations according to the starting target speed and the ignition speed, until the engine speed reaches the starting target speed.

[0040] Specifically, in this embodiment, the first preset speed is determined according to the ignition speed, and the second preset speed is determined according to the startup target speed, so that the engine speed is controlled to increase from zero to the first preset speed at the first preset speed slope, and the engine speed is controlled to increase from the first preset speed to the second preset speed at the second preset speed slope. The speed value of the second preset speed is equal to the speed value of the startup target speed, so that the engine speed can quickly reach the ignition speed and smoothly rise to the startup target speed.

[0041] Furthermore, in some embodiments of the present invention, the vehicle engine start control method includes: when the vehicle starts the range extension mode or the power battery of the vehicle is less than a preset power, determining that the vehicle meets the range extension requirement.

[0042] Specifically, in this embodiment, when the user predicts an upcoming long-distance trip or the current power battery power is insufficient to support the remaining journey, a command can be issued through the touch screen, physical button or voice control system to control the vehicle to start the extended range mode. The battery management system will monitor the voltage, current, temperature and other parameters of the battery in real time, and calculate the remaining power of the battery accordingly. When the battery management system detects that the power battery power is lower than the preset power, it will send a signal to the vehicle control system to determine that the vehicle meets the extended range requirement. Among them, the preset power can be 10%, 15% or 20% of the power of the fully charged power battery. In addition, the present invention does not specifically limit the value of the preset power.

[0043] Further, in some embodiments of the present invention, Figure 2 As shown, according to the starting target speed and the ignition speed, the generator is controlled to drive the engine to perform multiple accelerations, including:

[0044] S201, determining a first preset speed according to an ignition speed, and determining a second preset speed according to a startup target speed.

[0045] Specifically, in this real-time example, Figure 3 As shown, the first preset speed n_target1 is determined according to the ignition speed, and then the first preset speed n_target1 is used as the target speed of the first acceleration stage, and the second preset speed n_target2 is determined according to the startup target speed, and then the second preset speed n_target2 is used as the target speed of the second acceleration stage. It should be noted that, Figure 3 The horizontal coordinate in the figure represents time in seconds, and the vertical coordinate represents rotation speed in revolutions per minute.

[0046] S202, controlling the engine speed to increase from zero to a first preset speed at a first preset speed slope.

[0047] Specifically, in this embodiment, Figure 3 As shown, after the vehicle controller determines the first preset speed n_target1 according to the ignition speed, it controls the engine speed to increase from zero to the first preset speed n_target1 at the first preset speed slope k1, wherein the first preset speed slope k1 is calibrated according to the characteristics of the engine and stored in the vehicle's memory.

[0048] S203, controlling the engine speed to increase from the first preset speed to the second preset speed at a second preset speed slope.

[0049] Specifically, in this embodiment, Figure 3 As shown, after the vehicle controller controls the engine speed to increase from zero to the first preset speed n_target1 at the first preset speed slope k1, the engine speed is controlled to increase from the first preset speed n_target1 to the second preset speed n_target2 at the second preset speed slope k2, wherein the second preset speed slope k2 is calibrated according to the characteristics of the engine and stored in the vehicle's memory, and the first preset speed slope k1 is greater than the second preset speed slope k2, thereby enabling the engine speed to quickly reach the ignition speed and smoothly rise to the start target speed. It should be noted that the total time for the engine speed to increase from zero to the second preset speed is 1 second.

[0050] Further, in some embodiments of the present invention, before obtaining the start target speed of the engine, the method further includes: sending a speed control instruction to the range extender to make the range extender enter a speed control mode.

[0051] Specifically, in this embodiment, when it is detected that the vehicle has a need to extend its range, for example, when the user predicts an upcoming long-distance trip or the current power battery power is insufficient to support the remaining journey, a command can be issued through the touch screen, physical buttons or voice control system to enable the vehicle controller to send a speed control command to the generator controller in the range extender, so that the range extender enters the speed control mode.

[0052] Further, in some embodiments of the present invention, Figure 4 As shown, the vehicle engine start control method further includes:

[0053] S301, when the engine speed is at the start target speed, determining that the engine is in an idle state.

[0054] Specifically, in this embodiment, a speed sensor can be provided on the engine to detect the real-time speed of the engine through the speed sensor. During the period when the first preset speed is determined according to the ignition speed and the second preset speed is determined according to the starting target speed, and the engine speed is controlled to increase from zero to the first preset speed with a first preset speed slope, and the engine speed is controlled to increase from the first preset speed to the second preset speed with a second preset speed slope, the engine speed continues to increase, and when the speed sensor detects that the engine speed is the starting target speed, it is determined that the engine is in an idle state.

[0055] S302: Send a torque control instruction to the range extender to make the range extender enter a torque control mode.

[0056] Specifically, in this embodiment, after the vehicle controller determines that the engine is in an idle state, the vehicle controller sends a torque control instruction to the range extender through a preset communication protocol, so that the range extender enters a torque control mode. In the torque control mode, the range extender can accurately control its output torque according to the instructions of the vehicle controller, and work in conjunction with the engine or motor to provide additional power support or power supply for the vehicle, thereby improving the vehicle's endurance, and enhancing the vehicle's overall performance and ease of use, providing users with a better driving experience.

[0057] In summary, in a specific embodiment of the present invention, when the user predicts an upcoming long-distance trip or the current power battery power is insufficient to support the remaining journey, a command can be issued through a touch screen, a physical button or a voice control system to enable the vehicle controller to send a speed control command to the generator controller in the range extender, so that the range extender enters a speed control mode, obtains the engine's start target speed from the vehicle controller, and obtains the ignition speed through the engine management system, determines the first preset speed according to the ignition speed, and determines the second preset speed according to the start target speed, and then the vehicle controller can control the engine speed to increase from zero to the first preset speed at a first preset speed slope, and control the engine speed to increase from the first preset speed to the second preset speed at a second preset speed slope. Among them, the speed value of the second preset speed is equal to the speed value of the start target speed, so that the engine speed can quickly reach the ignition speed and rise smoothly to the start target speed. When the engine speed is the start target speed, it is determined that the engine is in an idle state. After the vehicle controller determines that the engine is in an idle state, the vehicle controller sends a torque control command to the range extender through a preset communication protocol to enable the range extender to enter a torque control mode. In the torque control mode, the range extender can accurately control its output torque according to the instructions of the vehicle controller, and work in conjunction with the engine or electric motor to provide additional power support or power supply for the vehicle, thereby improving the vehicle's endurance and enhancing the vehicle's overall performance and ease of use, providing users with a better driving experience.

[0058] In summary, according to the engine starting control method of an embodiment of the present invention, when the vehicle meets the range extension requirement, the starting target speed and ignition speed of the engine are obtained, and then the generator is controlled according to the starting target speed and the ignition speed to drag the engine for multiple accelerations until the engine speed reaches the starting target speed. As a result, the engine speed can quickly reach the ignition speed and smoothly rise to the maximum starting speed, thereby improving the starting efficiency and starting smoothness, and effectively improving the noise, vibration and acoustic roughness performance of the whole vehicle, bringing a more comfortable and pleasant driving experience to the driver.

[0059] Based on the vehicle control method proposed in the aforementioned embodiment of the present invention, the embodiment of the present invention further proposes a computer-readable storage medium, on which a vehicle engine startup control program is stored. When the vehicle engine startup control program is executed by a processor, the vehicle engine startup control method of the aforementioned embodiment of the present invention is implemented.

[0060] According to the computer-readable storage medium of an embodiment of the present invention, by executing the starting control program of the vehicle engine through the processor, the engine speed can quickly reach the ignition speed and smoothly rise to the maximum starting speed, thereby improving the starting efficiency and the starting smoothness, and effectively improving the noise, vibration and sound roughness performance of the whole vehicle, bringing a more comfortable and pleasant driving experience to the driver.

[0061] Figure 5 4 is a block diagram of a vehicle engine start control device according to an embodiment of the present invention.

[0062] Specifically, the vehicle includes a range extender, the engine is applied to the range extender, the range extender also includes a generator, and the vehicle engine start control device 100 includes an acquisition module 10 and a control module 20 .

[0063] Among them, the acquisition module 10 is used to obtain the engine's starting target speed and ignition speed when the vehicle meets the extended range requirement; the control module 20 is used to control the generator to drag the engine for multiple accelerations according to the starting target speed and the ignition speed until the engine speed reaches the starting target speed.

[0064] In some embodiments of the present invention, the control module 20 is further configured to determine whether the vehicle meets the range extension requirement when the vehicle starts the range extension mode or the power battery of the vehicle is less than a preset power level.

[0065] In some embodiments of the present invention, the control module 20 is specifically used to determine a first preset speed based on the ignition speed, and to determine a second preset speed based on the starting target speed; to control the engine speed to increase from zero to the first preset speed at a first preset speed slope; and to control the engine speed to increase from the first preset speed to the second preset speed at a second preset speed slope.

[0066] In some embodiments of the present invention, the first preset rotation speed slope is greater than the second preset rotation speed slope.

[0067] In some embodiments of the present invention, before obtaining the start target speed of the engine, the obtaining module 10 is further configured to send a speed control instruction to the range extender so that the range extender enters a speed control mode.

[0068] In some embodiments of the present invention, the control module 20 is further configured to determine that the engine is in an idle state when the engine speed is the start target speed; and send a torque control instruction to the range extender to enable the range extender to enter a torque control mode.

[0069] It should be noted that other specific implementations of the vehicle engine starting control device proposed in the embodiment of the present invention can refer to the specific implementations of the vehicle engine starting control method in the aforementioned embodiment of the present invention, and will not be repeated here to reduce redundancy.

[0070] In summary, according to the starting control device of the vehicle engine in the embodiment of the present invention, when the vehicle meets the range extension requirement, the starting target speed and the ignition speed of the engine are obtained through the acquisition module, and then the generator is controlled through the control module to drag the engine for multiple accelerations according to the starting target speed and the ignition speed, until the engine speed reaches the starting target speed, thereby, the engine speed can quickly reach the ignition speed and rise smoothly to the maximum starting speed, thereby improving the starting efficiency, improving the starting smoothness, and effectively improving the noise, vibration and acoustic roughness performance of the whole vehicle, bringing a more comfortable and pleasant driving experience to the driver.

[0071] Figure 6 4 is a block diagram of a vehicle controller according to an embodiment of the present invention.

[0072] Specifically, Figure 6 As shown, the vehicle controller 1000 includes the vehicle engine start control device 100 according to the above-mentioned embodiment of the present invention.

[0073] According to the vehicle controller of the embodiment of the present invention, by adopting the starting control device of the vehicle engine of the above-mentioned embodiment of the present invention, the engine speed can quickly reach the ignition speed and smoothly rise to the maximum starting speed, thereby improving the starting efficiency and the starting smoothness, and effectively improving the noise, vibration and sound roughness performance of the whole vehicle, bringing a more comfortable and pleasant driving experience to the driver.

[0074] Figure 7 is a block diagram of a vehicle according to an embodiment of the present invention.

[0075] Specifically, Figure 7 As shown, the vehicle 2000 includes the vehicle controller 1000 according to the above-mentioned embodiment of the present invention.

[0076] According to the vehicle of the embodiment of the present invention, by adopting the vehicle controller of the above-mentioned embodiment of the present invention, the engine speed can quickly reach the ignition speed and smoothly rise to the maximum starting speed, thereby improving the starting efficiency and the starting smoothness, and effectively improving the noise, vibration and sound roughness performance of the whole vehicle, bringing a more comfortable and pleasant driving experience to the driver.

[0077] In addition, other structures and functions of the vehicle according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here to reduce redundancy.

[0078] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0079] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0080] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0081] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0082] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0083] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0084] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0085] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A vehicle engine startup control method, characterized in that: The vehicle includes a range extender, the engine is applied to the range extender, the range extender also includes a generator, and the method includes: When the vehicle meets the range extension requirement, obtaining a starting target speed and an ignition speed of the engine; The generator is controlled to drive the engine to perform multiple accelerations according to the starting target speed and the ignition speed until the speed of the engine reaches the starting target speed.

2. The vehicle engine startup control method according to claim 1, characterized in that: The method comprises: When the vehicle starts the extended-range mode or the power battery of the vehicle is less than a preset power level, it is determined that the vehicle meets the extended-range requirement.

3. The vehicle engine startup control method according to claim 1, characterized in that: The step of controlling the generator to drive the engine to perform multi-stage acceleration according to the starting target speed and the ignition speed includes: Determining a first preset speed according to the ignition speed, and determining a second preset speed according to the startup target speed; Controlling the speed of the engine to increase from zero to the first preset speed at a first preset speed slope; The engine speed is controlled to increase from the first preset speed to the second preset speed at a second preset speed slope.

4. The vehicle engine startup control method according to claim 3, characterized in that: The first preset speed slope is greater than the second preset speed slope.

5. The vehicle engine startup control method according to any one of claims 1 to 4, characterized in that: Before obtaining the start target speed of the engine, the method further includes: A speed control instruction is sent to the range extender to enable the range extender to enter a speed control mode.

6. The vehicle engine startup control method according to any one of claims 1 to 4, characterized in that: The method further comprises: When the speed of the engine is the starting target speed, determining that the engine is in an idle state; A torque control instruction is sent to the range extender to enable the range extender to enter a torque control mode.

7. A computer-readable storage medium, characterized in that: A vehicle engine startup control program is stored thereon, and when the vehicle engine startup control program is executed by a processor, a vehicle engine startup control method according to any one of claims 1-6 is implemented.

8. A vehicle engine start control device, characterized in that: The vehicle includes a range extender, the engine is applied to the range extender, the range extender also includes a generator, and the device includes: An acquisition module, used for acquiring a start target speed and an ignition speed of the engine when the vehicle meets the range extension requirement; The control module is used to control the generator to drive the engine to perform multiple accelerations according to the starting target speed and the ignition speed until the speed of the engine reaches the starting target speed.

9. A vehicle controller, characterized in that: A vehicle engine starting control device comprising the vehicle engine starting control device according to claim 8.

10. A vehicle, characterized in that: Including the vehicle controller as described in claim 9.

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