Control method and device of range extender, storage medium, vehicle control unit and vehicle

Abstract

The invention discloses a control method and device of a range extender, a storage medium, a vehicle control unit and a vehicle, and the shutdown control method of the range extender comprises the steps that when the range extender meets the shutdown condition, the rotating speed of the range extender is obtained; when the rotating speed of the range extender is larger than the first preset rotating speed, the real-time torque of the range extender is obtained; determining a target negative torque according to the real-time torque of the range extender; controlling the range extender according to the target negative torque so as to update the real-time torque of the range extender; and when the real-time torque of the range extender is smaller than the first preset shutdown torque, it is determined that the range extender is in an idling mode, and the range extender is controlled to be shut down. Therefore, the range extender can be quickly and stably stopped, so that the stopping noise is greatly reduced, the NVH performance of the whole vehicle is optimized, and comfortable driving experience is brought to a user.

Description

Technical Field

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

[0002] With the increasing global awareness of environmental protection and the transformation of energy structure, new energy vehicles, as the future development direction of the automobile industry, are experiencing unprecedented rapid development. Among them, extended-range electric vehicles have their unique advantages, that is, when the battery capacity is limited, the built-in range extender is used to charge the battery or directly drive the motor, effectively extending the vehicle's cruising range, and their control technology is relatively simple and the structural design is not complicated. They are gradually becoming an important force in the new energy vehicle market.

[0003] However, although extended-range electric vehicles have shown significant advantages in terms of driving range, their NVH (Noise, Vibration, Harshness) performance still faces greater challenges compared to pure electric vehicles. This is mainly because the engine and generator contained in the range extender will inevitably generate vibration and noise during operation, especially during the shutdown process of the range extender. Due to the limitations of system inertia and shutdown strategy, the engine still needs to continue to run for a period of time after receiving the shutdown command to complete the process of torque clearing and speed reduction. The noise generated during this period seriously affects the riding comfort and overall driving experience of the passengers in the car. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, the first object of the present invention is to propose a shutdown control method for a range extender, which can make the range extender shut down quickly and smoothly, thereby greatly reducing the shutdown noise, optimizing the NVH performance of the whole vehicle, and bringing a comfortable driving experience to users.

[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 shutdown control device for a range extender.

[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 shutdown control method for a range extender, wherein the method includes: when the range extender meets the shutdown condition, obtaining the rotational speed of the range extender; when the rotational speed of the range extender is greater than a first preset rotational speed, obtaining the real-time torque of the range extender; determining a target negative torque according to the real-time torque of the range extender; controlling the range extender according to the target negative torque to update the real-time torque of the range extender; when the real-time torque of the range extender is less than the first preset shutdown torque, determining that the range extender is in idle mode, and controlling the range extender to shut down.

[0010] According to the shutdown control method of the range extender of the embodiment of the present invention, the speed of the range extender is obtained when the range extender meets the shutdown condition, and the real-time torque of the range extender is obtained when the speed of the range extender is greater than the first preset speed, so as to determine the target negative torque according to the real-time torque of the range extender, and control the range extender according to the target negative torque to update the real-time torque of the range extender, and then when the real-time torque of the range extender is less than the first preset shutdown torque, it is determined that the range extender is in idle mode, and the range extender is controlled to shut down. In this way, the range extender can be shut down quickly and smoothly, thereby greatly reducing the shutdown noise, optimizing the NVH performance of the whole vehicle, and bringing a comfortable driving experience to the user.

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

[0012] According to an embodiment of the present invention, the method further includes: when the rotation speed of the range extender is less than or equal to the first preset rotation speed, determining that the range extender is in the idle mode.

[0013] According to an embodiment of the present invention, the range extender is applied to a vehicle, and the method further includes: when the vehicle turns off the range extension mode or the power battery of the vehicle is greater than a preset power, determining that the range extender meets the shutdown condition.

[0014] According to one embodiment of the present invention, the range extender includes an engine and a generator, and controlling the range extender to shut down includes: obtaining a real-time temperature of the engine coolant; when the real-time temperature of the engine coolant is greater than a preset temperature, controlling the generator to continuously drag the engine to rotate for a preset time, and then sending a shutdown command to the engine; when the real-time temperature of the engine coolant is less than or equal to the preset temperature, sending a shutdown command to the engine.

[0015] According to one embodiment of the present invention, the control of shutting down the range extender further includes: obtaining the current speed of the engine; reporting the engine shutdown timeout fault when the current speed of the engine is greater than or equal to a second preset speed; obtaining the current speed and current torque of the generator when the engine shutdown timeout fault reporting is completed or the current speed of the engine is less than the second preset speed; reporting the generator speed reduction timeout fault when the current speed of the generator is greater than or equal to a third preset speed or the current torque of the generator is greater than or equal to the second preset shutdown torque; sending a shutdown command to the generator when the generator speed reduction timeout fault reporting is completed or the current speed of the generator is less than the third preset speed and the current torque of the generator is less than the second preset shutdown torque.

[0016] According to one embodiment of the present invention, the controlling the shutdown of the range extender further includes: obtaining the current state of the generator; when the current state of the generator is not in the shutdown state, reporting the generator shutdown timeout fault; when the reporting of the generator shutdown timeout fault is completed or the current state of the generator is in the shutdown state, completing the shutdown control of the range extender.

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

[0018] According to the computer-readable storage medium of the embodiment of the present invention, the range extender can be shut down quickly and smoothly by executing the shutdown control program of the range extender through the processor, thereby greatly reducing the shutdown noise, optimizing the NVH performance of the whole vehicle, and bringing a comfortable driving experience to the user.

[0019] In order to achieve the above-mentioned purpose, an embodiment of the third aspect of the present invention proposes a shutdown control device for a range extender, wherein the device includes: an acquisition module, used to acquire the rotational speed of the range extender when the range extender meets the shutdown condition; when the rotational speed of the range extender is greater than a first preset rotational speed, acquire the real-time torque of the range extender; a determination module, used to determine the target negative torque according to the real-time torque of the range extender; a control module, used to control the range extender according to the target negative torque to update the real-time torque of the range extender; when the real-time torque of the range extender is less than the first preset shutdown torque, determine that the range extender is in idle mode and control the range extender to shut down.

[0020] According to the shutdown control device of the range extender of the embodiment of the present invention, the acquisition module acquires the speed of the range extender when the range extender meets the shutdown condition, and acquires the real-time torque of the range extender when the speed of the range extender is greater than the first preset speed, thereby determining the target negative torque according to the real-time torque of the range extender through the determination module, and controlling the range extender according to the target negative torque through the control module to update the real-time torque of the range extender, and then determining that the range extender is in idle mode when the real-time torque of the range extender is less than the first preset shutdown torque, and controlling the range extender to shut down. In this way, the range extender can be shut down quickly and smoothly, thereby greatly reducing the shutdown noise, optimizing the NVH performance of the whole vehicle, and bringing a comfortable driving experience to the user.

[0021] In order to achieve the above-mentioned purpose, a fourth aspect of the present invention proposes a vehicle controller, characterized in that it includes the shutdown control device of the range extender of the aforementioned embodiment of the present invention.

[0022] According to the vehicle controller of the embodiment of the present invention, by adopting the shutdown control device of the range extender of the above embodiment of the present invention, the range extender can be shut down quickly and smoothly, thereby greatly reducing the shutdown noise, optimizing the NVH performance of the vehicle, and bringing a comfortable driving experience to the user.

[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 embodiment of the present invention, the range extender can be shut down quickly and smoothly, thereby greatly reducing the shutdown noise, optimizing the NVH performance of the vehicle, and bringing a comfortable driving experience to the user.

[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 shutdown control method of a range extender according to an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of a process flow of real-time torque update of a range extender according to an embodiment of the present invention;

[0028] Figure 3 is a flow chart of a shutdown control method of a range extender according to another embodiment of the present invention;

[0029] Figure 4 is a flow chart of a shutdown control method of a range extender according to another embodiment of the present invention;

[0030] Figure 5 is a flow chart of a shutdown control method of a range extender according to another embodiment of the present invention;

[0031] Figure 6 is a flow chart of a shutdown control method of a range extender according to a specific embodiment of the present invention;

[0032] Figure 7 is a block diagram of a shutdown control device for a range extender according to an embodiment of the present invention;

[0033] Figure 8 is a block diagram of a vehicle controller according to an embodiment of the present invention;

[0034] Fig. 9 is a block diagram of a vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION

[0035] 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.

[0036] The following describes a shutdown control method for a range extender, a computer-readable storage medium, a shutdown control device for a range extender, a vehicle controller, and a vehicle according to embodiments of the present invention with reference to the accompanying drawings.

[0037] Figure 1 1 is a flow chart of a shutdown control method for a range extender according to an embodiment of the present invention.

[0038] Specifically, in some embodiments of the present invention, Figure 1 As shown, the shutdown control method of the range extender includes:

[0039] S101, when the range extender meets the shutdown condition, obtaining the rotation speed of the range extender.

[0040] Specifically, in this embodiment, when the driver actively chooses to turn off the range extender mode, or switches to other driving modes that do not require the range extender to work, or when the vehicle's power battery is greater than a preset power level, the range extender will meet the shutdown condition. In addition, the present invention may not specifically limit the situation in which the range extender meets the shutdown condition. A speed sensor can be installed on the range extender, and the real-time speed of the range extender can be obtained through the speed sensor. It should be noted that the range extender includes an engine and a generator, and the speed of the range extender includes the speed of the engine and the speed of the generator.

[0041] S102, when the rotation speed of the range extender is greater than a first preset rotation speed, obtaining the real-time torque of the range extender.

[0042] Specifically, in this embodiment, the real-time speed of the range extender is obtained through the speed sensor. When the speed of the range extender is greater than the first preset speed, a torque sensor can be installed on the range extender, and the real-time torque of the range extender is obtained in real time through the torque sensor, wherein the first preset speed is the speed of the range extender when it is at idle speed. It should be noted that the range extender includes an engine and a generator. When the speed of the engine is greater than the speed of the engine when it is at idle speed, and the speed of the generator is greater than the speed of the generator when it is at idle speed, it is determined that the speed of the range extender is greater than the first preset speed.

[0043] S103, determining a target negative torque according to the real-time torque of the range extender.

[0044] Specifically, in this embodiment, after the vehicle controller obtains the real-time torque of the range extender, it can query the optimal torque zeroing curve according to the real-time torque of the range extender to determine the target negative torque. Among them, the optimal torque zeroing curve is designed for a specific vehicle model and range extender. After collecting and analyzing torque data through rigorous test field calibration tests, it is fitted using a scientific method. The optimal torque zeroing curve is stored in the vehicle's electronic control unit or a dedicated storage medium to provide accurate torque control guidance during the range extender shutdown process to ensure the stability and efficiency of the system operation.

[0045] S104: Control the range extender according to the target negative torque to update the real-time torque of the range extender.

[0046] Specifically, in this embodiment, Figure 2As shown, first, the system obtains the current torque of the range extender for the first time, and immediately determines the target negative torque required to be achieved under the current working condition by querying the optimal torque zeroing curve pre-stored in the vehicle electronic control unit. Subsequently, the system starts the PID (Proportional Integral Derivative, proportional-integral-differential control system) controller, and sends an adjustment instruction to the vehicle controller according to the deviation between the current torque and the target negative torque. After receiving the adjustment instruction, the vehicle controller sends a target negative torque instruction to the range extender to control the range extender. At the same time, the system uses the torque sensor to monitor the actual torque change of the range extender in real time. If the range extender torque obtained for the second time is still greater than zero after the initial control, the system queries the optimal torque zeroing curve again to determine the target negative torque under the current working condition. This process reflects the system's flexible response capability to changes in working conditions. After that, the PID controller continues to send adjustment instructions to the vehicle controller according to the new target negative torque. After receiving the adjustment instruction, the vehicle controller sends a target negative torque instruction to the range extender to control the range extender until the real-time torque of the range extender gradually approaches zero. This cycle is repeated until the range extender torque is completely cleared to zero, thereby ensuring the stability and efficiency of the range extender during shutdown.

[0047] S105 , when the real-time torque of the range extender is less than the first preset shutdown torque, determining that the range extender is in an idle mode, and controlling the range extender to shut down.

[0048] Specifically, in this embodiment, the range extender is controlled according to the target negative torque, the real-time torque of the range extender is updated, and when the real-time torque of the range extender is detected by the torque sensor to be less than the first preset torque, it is determined that the range extender enters the idle mode, and then the vehicle controller can send a shutdown command to the range extender to control the range extender to shut down. Among them, the first preset torque can be 0 Nm, 2 Nm or 3 Nm, etc., which is not specifically limited here. It should be noted that the range extender includes an engine and a generator. When the torque of the engine is less than the first preset shutdown torque, and the torque of the generator is less than the first preset shutdown torque, it is determined that the range extender is in the idle mode.

[0049] Further, in some embodiments of the present invention, the method further includes: when the rotation speed of the range extender is less than or equal to a first preset rotation speed, determining that the range extender is in an idle mode.

[0050] Specifically, in this embodiment, when the range extender meets the shutdown condition, the speed of the range extender is obtained, and the real-time speed of the range extender is obtained through the speed sensor. When the speed of the range extender is less than or equal to the first preset speed, it is determined that the range extender is in idle mode. Among them, the first preset speed is the speed of the range extender when it is idle. It should be noted that the range extender includes an engine and a generator. When the speed of the engine is less than or equal to the speed of the engine when it is idle, or the speed of the generator is less than the speed of the generator when it is idle, it is determined that the speed of the range extender is less than the first preset speed.

[0051] Furthermore, in some embodiments of the present invention, the range extender is applied to a vehicle, and the shutdown control method of the range extender further includes: when the vehicle turns off the range extension mode or the power battery of the vehicle is greater than a preset power, determining that the range extender meets the shutdown condition.

[0052] Specifically, in this embodiment, the user issues a command through a touch screen, a physical button or a voice control system to control the vehicle to turn off the range extender mode, and then it can be determined that the range extender meets the shutdown condition. 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 higher than the preset power, it will send a signal to the vehicle control system to determine that the range extender meets the shutdown condition. 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 need to specifically limit the value of the preset power.

[0053] Further, in some embodiments of the present invention, Figure 3 As shown, the range extender includes an engine and a generator, and the range extender shutdown control includes:

[0054] S201, obtaining the real-time temperature of the engine coolant.

[0055] Specifically, in this embodiment, a temperature sensor may be installed in the engine coolant to obtain the real-time temperature of the engine coolant through the temperature sensor. In addition, the present invention may not specifically limit the method of obtaining the engine coolant.

[0056] S202, when the real-time temperature of the engine coolant is greater than a preset temperature, the generator is controlled to continuously drag the engine to rotate for a preset time, and then a shutdown command is sent to the engine.

[0057] Specifically, in this embodiment, the real-time temperature of the engine coolant is obtained through the temperature sensor. When the real-time temperature of the engine coolant is greater than the preset temperature, the vehicle controller controls the generator to continuously drive the engine to rotate so as to cool down the engine coolant. After the generator continuously drives the engine to rotate for a preset period of time, the vehicle controller sends a shutdown command to the engine to control the engine to shut down. This effectively protects the engine and improves vehicle performance and environmental protection.

[0058] S203, when the real-time temperature of the engine coolant is less than or equal to a preset temperature, sending a shutdown command to the engine.

[0059] Specifically, in this embodiment, the real-time temperature of the engine coolant is obtained by the temperature sensor. When the real-time temperature of the engine coolant is less than or equal to the preset temperature, the vehicle controller sends a shutdown command to the engine to control the engine to shut down. In addition, the present invention may not specifically limit the value of the preset temperature. The value of the preset temperature needs to comprehensively consider engine performance, cooling efficiency, material durability, environmental conditions, fuel economy, emission requirements, safety performance and other conditions.

[0060] Further, in some embodiments of the present invention, Figure 4 As shown, controlling the range extender to stop also includes:

[0061] S301, obtaining the current speed of the engine.

[0062] Specifically, in this embodiment, a rotation speed sensor may be installed on the engine to obtain the current rotation speed of the engine through the rotation speed sensor.

[0063] S302: When the current engine speed is greater than or equal to a second preset speed, an engine shutdown timeout fault is reported.

[0064] Specifically, in this embodiment, the current speed of the engine is obtained through the speed sensor, and when the current speed of the engine is greater than or equal to the second preset speed, the engine shutdown timeout fault is reported, wherein the second preset speed is the ignition speed of the engine, and then during the engine shutdown process, if the engine speed accidentally remains in or exceeds the ignition speed range, the system will promptly report the shutdown timeout fault. This can improve vehicle safety, maintenance efficiency and driving experience, and reduce maintenance costs.

[0065] S303, when the engine shutdown timeout fault is reported or the current speed of the engine is less than the second preset speed, obtaining the current speed and current torque of the generator.

[0066] Specifically, in this embodiment, the current speed of the engine is obtained through the speed sensor, and when the current speed of the engine is greater than or equal to the second preset speed, the engine shutdown timeout fault is reported, and when the engine shutdown timeout fault is reported, the current speed and current torque of the generator are obtained, or the current speed of the engine is obtained through the speed sensor, and when the current speed of the engine is less than the second preset speed, the current speed and current torque of the generator are obtained. Among them, the second preset speed is the ignition speed of the engine, and then during the engine shutdown process, if the engine speed accidentally remains in or exceeds the ignition speed range, the system will report the shutdown timeout fault in time, and after the shutdown timeout fault is reported, the current speed and current torque of the generator are obtained, and if the engine speed does not exceed the ignition speed range, the current speed and current torque of the generator are directly obtained.

[0067] It should be noted that a rotation speed sensor and a torque sensor may be installed on the generator, so as to obtain the current rotation speed of the generator through the rotation speed sensor and obtain the current torque of the generator through the torque sensor.

[0068] S304: When the current rotation speed of the generator is greater than or equal to the third preset rotation speed, or the current torque of the generator is greater than or equal to the second preset shutdown torque, report a generator speed reduction timeout fault.

[0069] Specifically, in this embodiment, the current speed of the generator is obtained through the speed sensor, and the current torque of the generator is obtained through the torque sensor, and then when the current speed of the generator is greater than or equal to the third preset speed, or the current torque of the generator is greater than or equal to the second preset shutdown torque, the generator speed reduction timeout fault is reported, wherein the third preset speed can be 0 rpm, 5 rpm or 8 rpm, etc., and the second preset shutdown torque can be 0 Nm, 2 Nm or 3 Nm, etc. The present invention may not specifically limit the values ​​of the third preset speed and the second preset shutdown torque. In turn, the vehicle safety, maintenance efficiency and driving experience can be improved, and the maintenance cost can be reduced.

[0070] S305, when the generator speed reduction timeout fault report is completed, or the current speed of the generator is less than the third preset speed and the current torque of the generator is less than the second preset shutdown torque, send a shutdown command to the generator.

[0071] Specifically, in this embodiment, the current speed of the generator is obtained through the speed sensor, and the current torque of the generator is obtained through the torque sensor, and then when the current speed of the generator is greater than or equal to the third preset speed, or the current torque of the generator is greater than or equal to the second preset shutdown torque, a generator speed reduction timeout fault is reported, and when the generator speed reduction timeout fault reporting is completed, a shutdown command is sent to the generator to control the generator to shut down, or when the current speed of the generator is less than the third preset speed and the current torque of the generator is less than the second preset shutdown torque, a shutdown command is directly sent to the generator to control the generator to shut down.

[0072] Further, in some embodiments of the present invention, Figure 5 As shown, controlling the range extender to stop also includes:

[0073] S401, obtaining the current state of the generator.

[0074] Specifically, in this embodiment, a temperature sensor can be installed on the generator to obtain the temperature of the generator through the temperature sensor, and the current state of the generator can be obtained based on the temperature of the generator. A vibration sensor can also be installed on the generator to detect the vibration of the generator through the vibration sensor, and the current state of the generator can be obtained based on the vibration of the generator. In addition, the present invention may not specifically limit the method of obtaining the current state of the generator.

[0075] S402: When the current state of the generator is not in the shutdown state, report a generator shutdown timeout fault.

[0076] Specifically, in this embodiment, after obtaining the current state of the generator, if the current state of the generator is not in a shutdown state, a generator shutdown timeout fault is reported to improve vehicle safety, maintenance efficiency and driving experience, and reduce maintenance costs.

[0077] S403, when the generator shutdown timeout fault report is completed, or the current state of the generator is in the shutdown state, the shutdown control of the range extender is completed.

[0078] Specifically, in this embodiment, after obtaining the current state of the generator, if the current state of the generator is not in the shutdown state, the generator shutdown timeout fault is reported, and when the generator shutdown timeout fault reporting is completed, the shutdown control of the range extender is completed; if the current state of the generator is in the shutdown state, the shutdown control of the range extender is completed.

[0079] In summary, in a specific embodiment of the present invention, Figure 6As shown, when the range extender meets the shutdown condition, the speed of the range extender is obtained, when the speed of the range extender is greater than the first preset speed, the real-time torque of the range extender is obtained, and the target negative torque is determined according to the real-time torque of the range extender, and the range extender is controlled according to the target negative torque to update the real-time torque of the range extender, when the real-time torque of the range extender is less than the first preset shutdown torque, it is determined that the range extender is in idle mode, and when the speed of the range extender is less than or equal to the first preset speed, it is determined that the range extender is in idle mode. When the real-time torque of the range extender is greater than or equal to the first preset shutdown torque, the engine torque reduction timeout fault is reported, and after the engine torque reduction timeout fault is reported, the real-time temperature of the engine coolant is obtained.

[0080] After determining that the range extender is in idle mode, the real-time temperature of the engine coolant is obtained. When the real-time temperature of the engine coolant is greater than the preset temperature, the generator is controlled to continuously drag the engine to rotate for a preset time, and then a shutdown command is sent to the engine. When the real-time temperature of the engine coolant is less than or equal to the preset temperature, a shutdown command is sent to the engine.

[0081] After sending a shutdown command to the engine, the current speed of the engine is obtained, and when the current speed of the engine is greater than or equal to the second preset speed, an engine shutdown timeout fault is reported. When the engine shutdown timeout fault reporting is completed or the current speed of the engine is less than the second preset speed, the current speed and current torque of the generator are obtained, and when the current speed of the generator is greater than or equal to the third preset speed, or the current torque of the generator is greater than or equal to the second preset shutdown torque, a generator speed reduction timeout fault is reported. When the generator speed reduction timeout fault reporting is completed, or the current speed of the generator is less than the third preset speed and the current torque of the generator is less than the second preset shutdown torque, a shutdown command is sent to the generator.

[0082] After sending a shutdown command to the generator, the current state of the generator is obtained. When the current state of the generator is not in the shutdown state, the generator shutdown timeout fault is reported. When the generator shutdown timeout fault reporting is completed or the current state of the generator is in the shutdown state, the shutdown control of the range extender is completed.

[0083] In summary, according to the shutdown control method of the range extender of the embodiment of the present invention, by obtaining the speed of the range extender when the range extender meets the shutdown condition, and when the speed of the range extender is greater than the first preset speed, obtaining the real-time torque of the range extender, thereby determining the target negative torque according to the real-time torque of the range extender, and controlling the range extender according to the target negative torque to update the real-time torque of the range extender, and then determining that the range extender is in idle mode when the real-time torque of the range extender is less than the first preset shutdown torque, and controlling the range extender to shut down. In this way, the range extender can be shut down quickly and smoothly, thereby greatly reducing the shutdown noise, optimizing the NVH performance of the whole vehicle, and bringing a comfortable driving experience to the user.

[0084] 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 shutdown control program of a range extender is stored. When the shutdown control program of the range extender is executed by a processor, the shutdown control method of the range extender of the aforementioned embodiment of the present invention is implemented.

[0085] According to the computer-readable storage medium of the embodiment of the present invention, the range extender can be shut down quickly and smoothly by executing the shutdown control program of the range extender through the processor, thereby greatly reducing the shutdown noise, optimizing the NVH performance of the whole vehicle, and bringing a comfortable driving experience to the user.

[0086] Figure 7 4 is a block diagram of a shutdown control device for a range extender according to an embodiment of the present invention.

[0087] Specifically, Figure 7 As shown, the shutdown control device 100 of the range extender includes an acquisition module 10 , a determination module 20 and a control module 30 .

[0088] Among them, the acquisition module 10 is used to obtain the rotational speed of the range extender when the range extender meets the shutdown condition; when the rotational speed of the range extender is greater than the first preset rotational speed, the real-time torque of the range extender is obtained; the determination module 20 is used to determine the target negative torque according to the real-time torque of the range extender; the control module 30 is used to control the range extender according to the target negative torque to update the real-time torque of the range extender; when the real-time torque of the range extender is less than the first preset shutdown torque, it is determined that the range extender is in idle mode and the range extender is controlled to shut down.

[0089] In some embodiments of the present invention, the determination module 20 is further configured to determine that the range extender is in the idle mode when the rotation speed of the range extender is less than or equal to a first preset rotation speed.

[0090] In some embodiments of the present invention, the range extender is applied to a vehicle, and the determination module 20 is further used to determine that the range extender meets the shutdown condition when the vehicle turns off the range extension mode or the power battery of the vehicle is greater than a preset power.

[0091] In some embodiments of the present invention, the range extender includes an engine and a generator, and the control module 30 is specifically used to obtain the real-time temperature of the engine coolant; when the real-time temperature of the engine coolant is greater than a preset temperature, the generator is controlled to continuously drag the engine to rotate for a preset time, and then a shutdown command is sent to the engine; when the real-time temperature of the engine coolant is less than or equal to the preset temperature, a shutdown command is sent to the engine.

[0092] In some embodiments of the present invention, the control module 30 is also used to obtain the current speed of the engine; report an engine shutdown timeout fault when the current speed of the engine is greater than or equal to the second preset speed; obtain the current speed and current torque of the generator when the engine shutdown timeout fault reporting is completed or the current speed of the engine is less than the second preset speed; report a generator speed reduction timeout fault when the current speed of the generator is greater than or equal to the third preset speed, or the current torque of the generator is greater than or equal to the second preset shutdown torque; send a shutdown command to the generator when the generator speed reduction timeout fault reporting is completed, or the current speed of the generator is less than the third preset speed and the current torque of the generator is less than the second preset shutdown torque.

[0093] In some embodiments of the present invention, the control module 30 is also used to obtain the current state of the generator; when the current state of the generator is not in the shutdown state, report the generator shutdown timeout fault; when the generator shutdown timeout fault reporting is completed, or the current state of the generator is in the shutdown state, complete the shutdown control of the range extender.

[0094] It should be noted that other specific implementations of the shutdown control device for the range extender proposed in the embodiment of the present invention can refer to the specific implementations of the shutdown control method for the range extender in the aforementioned embodiment of the present invention, and will not be repeated here to reduce redundancy.

[0095] In summary, according to the shutdown control device of the range extender of the embodiment of the present invention, the acquisition module acquires the speed of the range extender when the range extender meets the shutdown condition, and acquires the real-time torque of the range extender when the speed of the range extender is greater than the first preset speed, thereby determining the target negative torque according to the real-time torque of the range extender through the determination module, and controlling the range extender according to the target negative torque through the control module to update the real-time torque of the range extender, and then determining that the range extender is in idle mode when the real-time torque of the range extender is less than the first preset shutdown torque, and controlling the range extender to shut down. In this way, the range extender can be shut down quickly and smoothly, thereby greatly reducing the shutdown noise, optimizing the NVH performance of the whole vehicle, and bringing a comfortable driving experience to the user.

[0096] Figure 8 4 is a block diagram of a vehicle controller according to an embodiment of the present invention.

[0097] Specifically, Figure 8 As shown, the vehicle controller 1000 includes the shutdown control device 100 of the range extender according to the above embodiment of the present invention.

[0098] According to the vehicle controller of the embodiment of the present invention, by adopting the shutdown control device of the range extender of the above embodiment of the present invention, the range extender can be shut down quickly and smoothly, thereby greatly reducing the shutdown noise, optimizing the NVH performance of the vehicle, and bringing a comfortable driving experience to the user.

[0099] Fig. 9 is a block diagram of a vehicle according to an embodiment of the present invention.

[0100] Specifically, Fig. 9 As shown, the vehicle 2000 includes the vehicle controller 1000 according to the above-mentioned embodiment of the present invention.

[0101] According to the vehicle of the embodiment of the present invention, by adopting the vehicle controller of the above embodiment of the present invention, the range extender can be shut down quickly and smoothly, thereby greatly reducing the shutdown noise, optimizing the NVH performance of the vehicle, and bringing a comfortable driving experience to the user.

[0102] In addition, other structures and functions of the vehicle of 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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 shutdown control method for a range extender, characterized in that: The method comprises: When the range extender meets the shutdown condition, obtaining the rotation speed of the range extender; When the speed of the range extender is greater than a first preset speed, obtaining the real-time torque of the range extender; determining a target negative torque according to the real-time torque of the range extender; controlling the range extender according to the target negative torque to update the real-time torque of the range extender; When the real-time torque of the range extender is less than the first preset shutdown torque, it is determined that the range extender is in an idle mode, and the range extender is controlled to shut down.

2. The shutdown control method of the range extender according to claim 1, characterized in that: The method further comprises: When the rotation speed of the range extender is less than or equal to the first preset rotation speed, it is determined that the range extender is in the idle mode.

3. The shutdown control method of the range extender according to claim 1, characterized in that: The range extender is applied to a vehicle, and the method further comprises: When the vehicle turns off the range extension mode or the power battery of the vehicle has a power greater than a preset power level, it is determined that the range extender meets the shutdown condition.

4. The shutdown control method of the range extender according to claim 1, characterized in that: The range extender includes an engine and a generator, and the controlling the range extender to shut down includes: Obtaining the real-time temperature of the coolant of the engine; When the real-time temperature of the coolant of the engine is greater than a preset temperature, the generator is controlled to continuously drive the engine to rotate for a preset time, and then a shutdown command is sent to the engine; When the real-time temperature of the coolant of the engine is less than or equal to the preset temperature, a shutdown instruction is sent to the engine.

5. The shutdown control method of the range extender according to claim 4, characterized in that: The controlling the range extender to shut down further includes: Obtaining the current speed of the engine; When the current speed of the engine is greater than or equal to a second preset speed, reporting the engine shutdown timeout fault; When the engine shutdown timeout fault is reported, or the current speed of the engine is less than the second preset speed, obtaining the current speed and current torque of the generator; When the current speed of the generator is greater than or equal to a third preset speed, or the current torque of the generator is greater than or equal to a second preset shutdown torque, reporting a generator speed reduction timeout fault; When the generator speed reduction timeout fault is reported, or the current speed of the generator is less than the third preset speed and the current torque of the generator is less than the second preset shutdown torque, a shutdown command is sent to the generator.

6. The shutdown control method of the range extender according to claim 5, characterized in that: The controlling the range extender to shut down further includes: Obtaining the current state of the generator; When the current state of the generator is not in the shutdown state, reporting the generator shutdown timeout fault; When the generator shutdown timeout fault reporting is completed or the current state of the generator is in a shutdown state, the shutdown control of the range extender is completed.

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

8. A shutdown control device for a range extender, characterized in that: The device comprises: an acquisition module, configured to acquire the rotation speed of the range extender when the range extender meets the shutdown condition; and acquire the real-time torque of the range extender when the rotation speed of the range extender is greater than a first preset rotation speed; A determination module, configured to determine a target negative torque according to a real-time torque of the range extender; A control module is used to control the range extender according to the target negative torque to update the real-time torque of the range extender; when the real-time torque of the range extender is less than a first preset shutdown torque, determine that the range extender is in an idle mode and control the range extender to shut down.

9. A vehicle controller, characterized in that: The invention comprises the shutdown control device of the range extender as claimed in claim 8.

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

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