Range extended electric vehicle control method and device, range extended electric vehicle and storage medium

Abstract

The application discloses a range-extending electric vehicle control method and device, a range-extending electric vehicle and a storage medium. The range-extending electric vehicle control method comprises the following steps: when the range-extending electric vehicle is in a range-extending working mode, an engine controller obtains an engine speed signal from an engine controller, and determines an engine external characteristic torque according to the engine speed signal; the range-extending controller obtains a motor available torque from a motor controller, and determines a target limiting torque according to the engine external characteristic torque and the motor available torque; the range-extending controller obtains a current motor generation torque, and determines a motor output torque according to the target limiting torque and the current motor generation torque, so as to control the motor of the range-extending electric vehicle through the motor output torque. The application can effectively prevent the engine from being reversed, and protect the engine from being damaged, which is safe and reliable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of range extended electric vehicle control, and particularly relates to a range extended electric vehicle control method and device, a range extended electric vehicle and a storage medium. BACKGROUND

[0002] With the development trend of new energy, the market share of pure electric vehicles is becoming higher and higher. Pure electric products have the advantages of high economy, small pollutants and simple structure, but the problem of endurance mileage cannot be solved at present, especially the power consumption of engineering machinery is large, and the range extended power structure can make up for the deficiency. The electric vehicle with the range extended power structure works in the range extended mode, and the range extended electric vehicle has large low-speed torque, stable high-speed operation, high brake energy recovery efficiency, simple structure, easy maintenance and strong practicality. However, when the engine is abnormally stopped due to engine failure, fuel depletion or other abnormal conditions, the engine has the risk of being reversed by the motor or even to a high speed. The reverse rotation will cause problems such as engine cylinder pulling and supercharger damage. SUMMARY

[0003] The present application provides a range extended electric vehicle control method, device, range extended electric vehicle and storage medium to solve the problem of engine reverse rotation after engine abnormal stop, which further causes engine hardware damage.

[0004] According to an aspect of the present application, a range extended electric vehicle control method is provided, which comprises:

[0005] When the range extended electric vehicle is in the range extended working mode, the range control unit obtains the engine speed signal from the engine controller, and determines the engine external characteristic torque according to the engine speed information;

[0006] The range control unit obtains the motor available torque from the motor controller, and determines the target limit torque according to the engine external characteristic torque and the motor available torque;

[0007] The range control unit obtains the current motor generation torque, and determines the motor output torque according to the target limit torque and the current motor generation torque, so as to control the motor of the range extended electric vehicle through the motor output torque.

[0008] Optionally, the determination of the engine external characteristic torque according to the engine speed information comprises:

[0009] According to the engine speed information, the engine external characteristic curve table is searched to determine the engine external characteristic torque.

[0010] Optionally, the determination of the target limit torque according to the engine external characteristic torque and the motor available torque comprises:

[0011] The smaller one of the engine off characteristic torque and the motor available torque is taken as a target limit torque.

[0012] Optionally, after the current motor generating torque is obtained by the range extending controller, the method further comprises:

[0013] The absolute value and the operation sign of the current motor generating torque are determined based on the current motor generating torque.

[0014] Optionally, the motor output torque is determined according to the target limit torque and the current motor generating torque, comprising:

[0015] The smaller one of the absolute value of the target limit torque and the current motor generating torque is taken as a sample motor torque;

[0016] The sample motor torque is multiplied by the operation sign to obtain the motor output torque.

[0017] According to another aspect of the present application, there is provided a range extending electric vehicle control device, comprising:

[0018] An engine off characteristic torque determination module is configured to perform the following: when the range extending electric vehicle is in a range extending working mode, the range extending controller obtains an engine speed signal from an engine controller, and determines an engine off characteristic torque according to the engine speed signal;

[0019] A target limit torque determination module is configured to perform the following: the range extending controller obtains a motor available torque from a motor controller, and determines a target limit torque according to the engine off characteristic torque and the motor available torque;

[0020] A motor control module is configured to perform the following: the range extending controller obtains a current motor generating torque, and determines a motor output torque according to the target limit torque and the current motor generating torque, so as to control the motor of the range extending electric vehicle by the motor output torque.

[0021] According to another aspect of the present application, there is provided a range extending electric vehicle, comprising a range extending control system, the range extending control system comprising: an engine, an engine controller, a motor, a motor controller, an electric control box and a range extending controller, the engine is connected with the motor by spline fitting hardware, the engine is electrically connected with the engine controller, the motor controller is electrically connected with the motor, the range extending controller is communicatively connected with the engine controller and the motor controller respectively, and the motor controller is electrically connected with the electric control box; the range extending electric vehicle further comprises:

[0022] at least one processor; and

[0023] a memory in communication with the at least one processor; wherein

[0024] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to perform the range extending electric vehicle control method according to any one of the embodiments of the present application.

[0025] According to another aspect of the present application, there is provided a range extending electric vehicle, comprising a range extending control system and a vehicle controller, the range extending control system comprising an engine, an engine controller, an electric motor, an electric motor controller and an electric control box, the vehicle controller comprising a range extending controller, the engine being connected to the electric motor by spline hardware, the engine being electrically connected to the engine controller, the electric motor controller being electrically connected to the electric motor, the range extending controller being communicatively connected to the engine controller and the electric motor controller respectively, and the electric motor controller being electrically connected to the electric control box; the range extending electric vehicle further comprising:

[0026] at least one processor; and

[0027] a memory in communication with the at least one processor; wherein

[0028] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to perform the range extending electric vehicle control method according to any one of the embodiments of the present application.

[0029] According to another aspect of the present application, there is provided a computer readable storage medium storing computer instructions for enabling a processor to perform the range extending electric vehicle control method according to any one of the embodiments of the present application when executed by the processor.

[0030] The technical solution of the embodiments of the present application, when the range extending electric vehicle is in a range extending working mode, the range extending controller obtains an engine speed signal from the engine controller, and determines an engine external characteristic torque according to the engine speed signal; the range extending controller obtains an available torque of the electric motor from the electric motor controller, and determines a target limiting torque according to the engine external characteristic torque and the available torque of the electric motor; the range extending controller obtains a current electric motor generating torque, and determines an electric motor output torque according to the target limiting torque and the current electric motor generating torque, so as to control the electric motor of the range extending electric vehicle by the electric motor output torque. The present application solves the problem that the engine may reverse after abnormal engine shutdown, and further causes damage to the engine hardware, and effectively prevents the engine from reversing, and protects the engine from being damaged, which is safe and reliable.

[0031] It should be understood that the matters described in this detailed description are intended to be illustrative and are not intended to limit or restrict the scope of the embodiments of the present application. Other features of the present application will become apparent to those skilled in the art upon a reading of the following specification. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0033] Figure 1 is a flow chart of a control method of a range-extended electric vehicle according to an embodiment of the present application;

[0034] Figure 2 is a flow chart of a control method of a range-extended electric vehicle according to an embodiment of the present application;

[0035] Figure 3 is a structural schematic diagram of a range-extended electric vehicle control device according to an embodiment of the present application;

[0036] Figure 4 is a structural schematic diagram of a range-extended control system included in a range-extended electric vehicle according to an embodiment of the present application;

[0037] Figure 5 is a structural schematic diagram of a range-extended control system included in a range-extended electric vehicle according to an embodiment of the present application;

[0038] Figure 6 is a structural schematic diagram of a range-extended electric vehicle implementing a control method of the range-extended electric vehicle according to an embodiment of the present application. DETAILED DESCRIPTION

[0039] In order to make the technical personnel in the art better understand the present application scheme, the technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0040] It is to be understood that the terminology "current", "target" and the like used in the specification and the claims of the application and the above abstract are intended to describe a distinction between similar objects and are not necessarily intended to describe a specific order or chronology. It will be understood that data thus used can be interchanged, where appropriate, so that the embodiments of the application described herein can be carried out in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, processes, methods, systems, products or devices that include a list of steps or units are not necessarily limited to those steps or units expressly listed, but can include other steps or units not expressly listed or inherent to such processes, methods, products or devices.

[0041] Embodiment one

[0042] Figure 1 A flowchart of a control method of a range-extended electric vehicle is provided for the first embodiment of the application. The embodiment can be applied to the case of protecting the engine after the engine reverses. The control method of the range-extended electric vehicle can be executed by a range-extended electric vehicle control device, which can be realized in the form of hardware and / or software, and can be configured in the range-extended electric vehicle. As shown in the figure, the control method of the range-extended electric vehicle comprises: Figure 1

[0043] S110, when the range-extended electric vehicle is in the range-extended working mode, the range-extended controller obtains the engine speed signal from the engine controller, and determines the engine external characteristic torque according to the engine speed information.

[0044] The range-extended electric vehicle refers to a vehicle that automatically starts the range extender to provide power when the battery power consumption reaches the minimum critical limit, so as to achieve a driving range of up to hundreds of kilometers. This can effectively overcome the short driving range of traditional electric vehicles, so that the driver does not have to worry about it. In addition, the battery capacity of the range-extended electric vehicle only needs to be about 40% of that of a pure electric vehicle, which greatly reduces the cost. At the same time, the range-extended electric vehicle has obvious advantages in energy utilization efficiency, price, and convenience of use compared with other new energy vehicles.

[0045] The range-extended electric vehicle has two working modes, namely, a pure electric working mode and a range-extended working mode. When the range-extended electric vehicle is in the pure electric working mode, the power battery has sufficient power, and the vehicle driving energy is provided by the power battery. The power battery provides power to the electric motor, and the electric motor converts the electric energy into mechanical energy to provide power to the wheels to drive the vehicle. At this time, the generator and the engine are not working. When the range-extended electric vehicle is in the range-extended working mode, the power battery has insufficient power, and the generator and the engine are started to generate electricity to drive the vehicle to run.​

[0046] It can be understood that when the extended-range electric vehicle is in the extended-range working mode, the power battery is insufficient in power, and the engine external characteristic torque is determined by considering the engine external characteristic torque limit to prevent the engine from reversing, that is, the engine speed signal is obtained from the engine controller through the extended-range controller, and the engine external characteristic torque is determined according to the engine speed information and the engine external characteristic curve table.

[0047] In S120, the extended-range controller obtains the motor available torque from the motor controller, and determines the target limit torque according to the engine external characteristic torque and the motor available torque.

[0048] The motor available torque is the output torque of the motor, and the output torque of the motor is related to the speed and power of the motor. In this embodiment, the motor available torque can be obtained by testing through a special test device, and then the motor available torque is read through the motor controller. The special test device can be realized by using the prior art, and this embodiment does not make any limitation thereto.

[0049] The target limit torque is the output limit power generation torque determined according to the engine speed and the engine external characteristic torque limit to prevent the engine from reversing after the engine abnormally stops, and the current motor available torque is combined.

[0050] In this embodiment, the smaller one of the engine external characteristic torque and the motor available torque is selected as the target limit torque.

[0051] In S130, the current motor power generation torque is obtained through the extended-range controller, and the motor output torque is determined according to the target limit torque and the current motor power generation torque, so as to control the motor of the extended-range electric vehicle through the motor output torque.

[0052] The current motor power generation torque can be calculated through the extended-range controller, and the motor power generation torque can be calculated by using the existing calculation formula. This embodiment does not make any limitation to the calculation method of the current motor power generation torque.

[0053] After obtaining the current motor power generation torque, the absolute value and the operation symbol of the current motor power generation torque are determined based on the current motor power generation torque.

[0054] Further, the smaller one of the target limit torque and the absolute value of the current motor power generation torque is selected as the sample motor torque, and the motor output torque is obtained by multiplying the sample motor torque by the operation symbol, so as to realize automatic unloading of the motor torque, thereby preventing the motor from reversely driving the engine and avoiding damage to the engine hardware.

[0055] The technical scheme of the embodiment of the application, when the extended-range electric vehicle is in the extended-range working mode, the extended-range controller obtains an engine speed signal from an engine controller, and determines an engine external characteristic torque according to the engine speed information; the extended-range controller obtains a motor available torque from a motor controller, and determines a target limiting torque according to the engine external characteristic torque and the motor available torque; the extended-range controller obtains a current motor generation torque, and determines a motor output torque according to the target limiting torque and the current motor generation torque, so as to control the motor of the extended-range electric vehicle by the motor output torque. The application solves the problem that the engine may reverse after abnormal engine shutdown, and further causes damage to the engine hardware, effectively prevents the engine from reversing, protects the engine from damage, and is safe and reliable.

[0056] Embodiment two

[0057] Figure 2 A flowchart of an extended-range electric vehicle control method provided for the second embodiment of the application, the embodiment provides an alternative implementation based on the above-mentioned embodiment. As shown in the figure, the extended-range electric vehicle control method comprises: Figure 2

[0058] S210, when the extended-range electric vehicle is in the extended-range working mode, the extended-range controller obtains an engine speed signal from an engine controller, and determines an engine external characteristic torque according to the engine speed information, and executes step S230.

[0059] The engine external characteristic curve table can be calibrated by a one-dimensional torque table.

[0060] S220, the extended-range controller obtains a motor available torque from a motor controller, and executes step S230.

[0061] S230, the smaller one of the engine external characteristic torque and the motor available torque is taken as a target limiting torque, and step S250 is executed.

[0062] S240, the absolute value of the current motor generation torque is extracted from the current motor generation torque, and step S250 is executed.

[0063] S250, the smaller one of the target limiting torque and the absolute value of the current motor generation torque is taken as a sample motor torque, and step S270 is executed.

[0064] S260, the operation symbol of the current motor generation torque is extracted from the current motor generation torque, and step S270 is executed.

[0065] S270, the sample motor torque is multiplied by the operation symbol to obtain a motor output torque.​

[0066] In the embodiment, when the engine speed increases, the current motor generation torque does not exceed the engine limit torque value, when the engine speed gradually decreases, the current motor generation torque is correspondingly reduced due to the external characteristic limitation, and when the engine speed is low, the current motor generation torque is reduced to zero.

[0067] The technical scheme of the embodiment of the application can prevent the engine from reversing and avoid damage to the engine hardware when the engine abnormally stops, thereby improving the safety of the extended-range electric vehicle. In addition, the system is protected by the range extender controller RCU, without involving development changes of the controller, which is beneficial to modular development. In addition, the extended-range electric vehicle can predict the possible engine stop condition and timely unload the generation torque, with strong reliability. Meanwhile, the embodiment does not increase any hardware, which can effectively reduce the development cost and save costs.

[0068] Embodiment three

[0069] Figure 3 A structural schematic diagram of an extended-range electric vehicle control device provided by the third embodiment of the application is shown in FIG. 3. Figure 3 As shown in the figure, the extended-range electric vehicle control device comprises:

[0070] An engine external characteristic torque determination module 310 is configured to acquire an engine speed signal from an engine controller by the range extender controller when the extended-range electric vehicle is in the extended-range working mode, and determine an engine external characteristic torque according to the engine speed information.

[0071] A target limit torque determination module 320 is configured to acquire a motor available torque from a motor controller by the range extender controller, and determine a target limit torque according to the engine external characteristic torque and the motor available torque.

[0072] A motor control module 330 is configured to acquire a current motor generation torque by the range extender controller, and determine a motor output torque according to the target limit torque and the current motor generation torque, so as to control the motor of the extended-range electric vehicle by the motor output torque.

[0073] Optionally, the determination of the engine external characteristic torque according to the engine speed information is specifically configured to:

[0074] determine the engine external characteristic torque according to the engine speed information by searching an engine external characteristic curve table.

[0075] Optionally, the determination of the target limit torque according to the engine external characteristic torque and the motor available torque is specifically configured to:

[0076] The smaller one of the engine external characteristic torque and the motor available torque is taken as a target limiting torque.

[0077] Optionally, the extended-range electric vehicle control device further comprises:

[0078] A data separation module is configured to determine an absolute value and an operation symbol of a current motor generation torque based on the current motor generation torque.

[0079] Optionally, the motor output torque is determined based on the target limiting torque and the current motor generation torque, and the method comprises:

[0080] A sample motor torque determination unit is configured to take the smaller one of the target limiting torque and the absolute value of the current motor generation torque as a sample motor torque.

[0081] A motor output torque obtaining unit is configured to multiply the sample motor torque by the operation symbol to obtain a motor output torque.

[0082] The extended-range electric vehicle control device provided by the embodiments of the present application can perform the extended-range electric vehicle control method provided by any of the embodiments of the present application, and has the corresponding functional modules and beneficial effects of the performing method.

[0083] Embodiment Four

[0084] Figure 4 is a structural schematic diagram of an extended-range control system of an extended-range electric vehicle provided by the embodiments of the present application, the extended-range electric vehicle comprises the extended-range control system, and the extended-range control system comprises an engine, an engine controller, a motor, a motor controller, an electric control box and an extended-range controller, the engine is connected with the motor through spline fitting hardware, the engine is electrically connected with the engine controller through a low-voltage wire harness, the engine controller is configured to acquire relevant information of the engine and control the operation of the engine, the motor controller is electrically connected with the motor through a low-voltage wire harness, the motor controller acquires relevant information of the motor and controls the rotation of the motor through high-voltage three-phase alternating current, the extended-range controller is communicatively connected with the engine controller and the motor controller through a CAN bus, the extended-range controller acquires an engine speed signal and a torque and simultaneously monitors and protects the extended-range control system, and the motor controller is electrically connected with the electric control box; it should be noted that when the motor is used as a generator, the flow direction of energy is engine-motor-motor controller-electric control box.

[0085] Figure 5is another range extending control system structure diagram of a range extending electric vehicle provided by an embodiment of the present application, the range extending electric vehicle comprising a range extending control system and a vehicle controller, the range extending control system comprising: an engine, an engine controller, a motor, a motor controller and an electric control box, the vehicle controller comprising a range extending controller, the engine and the motor being connected by spline hardware, the engine being electrically connected with the engine controller through a low-voltage wire harness, the engine controller being configured to acquire relevant information of the engine and control the engine to work, the motor controller being electrically connected with the motor through a low-voltage wire harness, the motor controller being electrically connected with the motor through a low-voltage wire harness, the motor controller acquiring relevant information of the motor and controlling the motor to rotate through high-voltage three-phase alternating current, the range extending controller being communicatively connected with the engine controller and the motor controller through a CAN bus, the range extending controller acquiring engine speed signals and torque and monitoring and protecting the range extending control system, the motor controller being electrically connected with the electric control box; it should be noted that when the motor is used as a generator, the energy flow direction is engine-motor-motor controller-electric control box.

[0086] Figure 6 A structure diagram of a range extending electric vehicle 610 that can be used to implement embodiments of the present application is shown. The range extending electric vehicle includes a representation of a variety of forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The range extending electric vehicle also includes a representation of a variety of forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (e.g., headsets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be examples only, and are not meant to limit implementations of the present application described and / or claimed in this document.

[0087] As shown in Figure 6 The range extending electric vehicle 610 includes at least one processor 611, and a memory, such as a read-only memory (ROM) 612, a random access memory (RAM) 613, etc., which are communicatively connected with the at least one processor 611, wherein the memory stores computer programs executable by the at least one processor, and the processor 611 can perform various appropriate actions and processes according to the computer programs stored in the read-only memory (ROM) 612 or loaded from the storage unit 618 into the random access memory (RAM) 613. In the RAM 613, various programs and data required for the operation of the range extending electric vehicle 610 can also be stored. The processor 611, the ROM 612, and the RAM 613 are connected with each other through a bus 614. An input / output (I / O) interface 615 is also connected to the bus 614.

[0088] A plurality of components in the extended-range electric vehicle 610 are connected to the I / O interface 615, including: an input unit 616, such as a keyboard, a mouse, etc.; an output unit 617, such as various types of displays, speakers, etc.; a storage unit 618, such as a magnetic disk, an optical disk, etc.; and a communication unit 619, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 619 allows the extended-range electric vehicle 610 to exchange information / data with other devices through a computer network, such as the Internet, and / or various telecommunication networks.

[0089] The processor 611 can be various general and / or special purpose processing components having processing and computing capabilities. Some examples of the processor 611 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 611 performs various methods and processes described above, such as the extended-range electric vehicle control method.

[0090] In some embodiments, the extended-range electric vehicle control method can be implemented as a computer program tangibly embodied in a computer readable storage medium, such as the storage unit 618. In some embodiments, part or all of the computer program can be loaded and / or installed onto the extended-range electric vehicle 610 via the ROM 612 and / or the communication unit 619. When the computer program is loaded onto the RAM 613 and executed by the processor 611, one or more steps of the extended-range electric vehicle control method described above can be performed. Alternatively, in other embodiments, the processor 611 can be configured to perform the extended-range electric vehicle control method by any other appropriate means, such as by means of firmware.

[0091] Various implementations of the systems and techniques described above can be realized in digital electronic circuitry, integrated circuitry, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on a chip (SOC), a programmable logic device (CPLD), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0092] Computer programs for implementing the methods of the present application can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the computer program running on the processor implements the functions / operations specified in the flowcharts and / or block diagrams. The computer program can be executed entirely on a machine, partially on a machine, partially on a machine as a stand-alone software package and partially on a remote machine or entirely on a remote machine or server.

[0093] In the context of the present application, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer-readable storage medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. More specific examples of a machine-readable storage medium will include one or more lines of a program of instructions in a transitory signal form, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0094] To provide for interaction with a user, the systems and techniques described here can be implemented on an extended-range electric vehicle having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the extended-range electric vehicle. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0095] The systems and techniques described herein can be implemented in a computing system that includes a back end component, e.g., as a data server, or that includes a middleware component, e.g., an application server, or that includes a front end component, e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described herein, or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication, e.g., a communication network. Examples of communication networks include a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0096] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. A server can be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system, to solve the defects of large management difficulty and weak business scalability in traditional physical host and VPS service.

[0097] It should be understood that the various forms of flow shown above can be re-ordered, added to, or deleted from without departing from the scope of the present disclosure. For example, the steps recited in the present disclosure can be executed in parallel, executed in sequence, or executed in different orders, as long as the desired results of the technical solutions of the present disclosure can be achieved, and the present disclosure is not limited herein.

[0098] The above detailed description does not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A control method of a range extended electric vehicle, characterized by, Comprising: When the extended-range electric vehicle is in the extended-range working mode, the extended-range controller acquires an engine speed signal from an engine controller, and determines an engine off-throttle torque according to the engine speed information; The extended-range controller acquires a motor available torque from a motor controller, and determines a target limit torque according to the engine off-throttle torque and the motor available torque; The extended-range controller acquires a current motor generation torque, and determines a motor output torque according to the target limit torque and the current motor generation torque, so as to control the motor of the extended-range electric vehicle through the motor output torque; The determination of the target limit torque according to the engine off-throttle torque and the motor available torque comprises: Taking the smaller one of the engine off-throttle torque and the motor available torque as the target limit torque; After acquiring the current motor generation torque through the extended-range controller, the method further comprises: Determining an absolute value and an operation symbol of the current motor generation torque based on the current motor generation torque; The determination of the motor output torque according to the target limit torque and the current motor generation torque comprises: Taking the smaller one of the target limit torque and the absolute value of the current motor generation torque as a sample motor torque; Multiplying the sample motor torque by the operation symbol to obtain the motor output torque.

2. The range extended electric vehicle control method of claim 1, wherein, The determination of the engine off-throttle torque according to the engine speed information comprises: Looking up an engine off-throttle characteristic curve table according to the engine speed information to determine the engine off-throttle torque.

3. A range extended electric vehicle control device, characterized by, Comprising: An engine off-throttle torque determination module, configured to perform, when the extended-range electric vehicle is in the extended-range working mode, the extended-range controller acquires an engine speed signal from an engine controller, and determines an engine off-throttle torque according to the engine speed information; A target limit torque determination module, configured to perform the extended-range controller acquires a motor available torque from a motor controller, and determines a target limit torque according to the engine off-throttle torque and the motor available torque; A motor control module, configured to perform the extended-range controller acquires a current motor generation torque, and determines a motor output torque according to the target limit torque and the current motor generation torque, so as to control the motor of the extended-range electric vehicle through the motor output torque; The determination of the target limit torque according to the engine off-throttle torque and the motor available torque is specifically configured to: Take the smaller one of the engine off-throttle torque and the motor available torque as the target limit torque. The extended-range electric vehicle control device further comprises: A data separation module, configured to perform determining an absolute value and an operation symbol of the current motor generation torque based on the current motor generation torque; The determination of the motor output torque according to the target limit torque and the current motor generation torque comprises: A sample motor torque determination unit, configured to perform taking the smaller one of the target limit torque and the absolute value of the current motor generation torque as a sample motor torque; A motor output torque obtaining unit, configured to perform multiplying the sample motor torque by the operation symbol to obtain the motor output torque.

4. The extended-range electric vehicle control device according to claim 3, characterized by, The engine speed information is used to determine the engine external characteristic torque, and specifically for: An engine external characteristic torque is determined by searching an engine external characteristic curve table according to the engine speed information.

5. A range extended electric vehicle, characterized by, The range-extending electric vehicle comprises a range-extending control system, and the range-extending control system comprises an engine, an engine controller, an electric motor, an electric motor controller, an electric control box, and a range-extending controller. At least one processor; and A memory in communication with the at least one processor; wherein The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the range-extending electric vehicle control method in claim 1 or 2.

6. A range extended electric vehicle, characterized by, The range-extending electric vehicle comprises a range-extending control system and a vehicle controller, and the range-extending control system comprises an engine, an engine controller, an electric motor, an electric motor controller, and an electric control box. At least one processor; and A memory in communication with the at least one processor; wherein The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the range-extending electric vehicle control method in claim 1 or 2.

7. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions for causing the processor to execute the range-extending electric vehicle control method in claim 1 or 2.

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