CN117284274B

CN117284274B - Control method and control device of range extender system of vehicle and electronic equipment

Info

Publication number: CN117284274B
Application number: CN202311562481.0A
Authority: CN
Inventors: 单海彭; 张同伟; 张金城; 任伟
Original assignee: Weichai New Energy Power Technology Co ltd; Weichai Power Co Ltd
Current assignee: Weichai New Energy Power Technology Co ltd; Weichai Power Co Ltd
Priority date: 2023-11-22
Filing date: 2023-11-22
Publication date: 2024-03-19
Anticipated expiration: 2043-11-22
Also published as: CN117284274A

Abstract

The application provides a control method, a control device and electronic equipment of a range extender system of a vehicle, wherein the vehicle at least comprises an engine, an electric control system and a battery system, the electric control system is electrically connected with the battery system, the battery system comprises a current sensor, and the method comprises the following steps: receiving current information sent by a current sensor, wherein the current information comprises a current direction and a current value, the current direction comprises a first direction and a second direction, the directions of the first direction and the second direction are opposite, the current direction is the first direction under the condition that an engine is reversed, and the current direction is the second direction under the condition that the engine is not reversed; and under the condition that the current direction is the first direction and the current value is larger than a first preset threshold value, the electric connection loop of the electric control system and the battery system is controlled to be disconnected. By the method and the device, the problem that the response speed of the engine reverse rotation detection method in the prior art is low is solved.

Description

Control method and control device of range extender system of vehicle and electronic equipment

Technical Field

The present invention relates to the field of control of vehicles, and in particular, to a control method, a control device, a computer-readable storage medium, and an electronic apparatus for a range extender system of a vehicle.

Background

In the starting stage of the vehicle, the engine drives the generator to operate forward in the normal mode, and under the abnormal conditions of abnormal shutdown and the like of the engine, the generator drives the engine to operate reversely, and under the conditions, if the engine is not shut down in time, the engine can be damaged to different degrees. In the prior art, the rotation speed of the engine is measured by adding the rotation speed measuring device so as to judge whether the engine is reversed, but the volume of the rotation speed measuring device is usually larger, and more vehicle space is occupied.

Therefore, a method and apparatus for detecting engine reverse rotation in the prior art, which can solve the problem, occupy a large amount of vehicle space, is needed.

Disclosure of Invention

The main objective of the present application is to provide a control method, a control device, a computer readable storage medium and an electronic device for a range extender system of a vehicle, so as to at least solve the problem that the detection method of engine reversal occupies more vehicle space in the prior art.

In order to achieve the above object, according to one aspect of the present application, there is provided a control method of a range extender system of a vehicle including at least an engine, an electric control system, and a battery system, the engine and the electric control system being electrically connected, the electric control system and the battery system being electrically connected, the battery system including a current sensor, the control method comprising: receiving current information sent by the current sensor, wherein the current sensor is used for measuring the magnitude and the direction of current, the current information is obtained by measuring the current of an electric connection loop of the electric control system and the battery system by the current sensor, the current information comprises a current direction and a current value, the current direction comprises a first direction and a second direction, the directions of the first direction and the second direction are opposite, the current direction is the first direction under the condition that the engine is reversed, and the current direction is the second direction under the condition that the engine is not reversed; and under the condition that the current direction is the first direction and the current value is larger than a first preset threshold value, the electric control system is controlled to be disconnected from the electric connection loop of the battery system.

Optionally, the vehicle further includes a generator mechanically connected to the engine, and in the case that the current direction is the first direction and the current value is greater than a first preset threshold, the control method further includes: generating a first fault signal, sending the first fault signal to an engine control unit, and enabling the engine control unit to generate a first control instruction under the condition that the first fault signal is received, wherein the first fault signal indicates that the fault degree of the engine is a first-level fault, the fault degree also comprises a second-level fault and a third-level fault, the fault degree of the first-level fault is larger than the second-level fault, the fault degree of the second-level fault is larger than the third-level fault, and the first control instruction is an instruction for controlling the engine to stop injecting fuel; and sending the first fault signal to a generator control unit so that the generator control unit generates a second control instruction under the condition that the first fault signal is received, wherein the second control instruction is an instruction for controlling the output torque of the generator to be 0.

Optionally, the control method further includes: generating a second fault signal under the condition that the current direction is the first direction, the current value is larger than a second preset threshold value and smaller than or equal to the first preset threshold value, wherein the second fault signal indicates that the fault degree of the engine is a second-level fault, the fault degree also comprises a first-level fault and a third-level fault, the fault degree of the first-level fault is larger than the second-level fault, the fault degree of the second-level fault is larger than the third-level fault, and the second preset threshold value is smaller than the first preset threshold value; the second fault signal is sent to an engine control unit and a generator control unit, so that the engine control unit controls the engine to stop injecting fuel according to at least the second fault signal, and the generator control unit controls the output torque of the generator to be 0 according to at least the second fault signal.

Optionally, the engine control unit is caused to control the engine to stop injecting fuel according to at least the second fault signal, and the generator control unit is caused to control the output torque of the generator to be 0 according to at least the second fault signal, including: determining a duration of the secondary failure of the engine; generating a timeout signal when the duration period is greater than a first preset period, and sending the timeout signal to the engine control unit so that the engine control unit generates a third control instruction when receiving the second fault signal and the timeout signal, wherein the third control instruction is an instruction for controlling the engine to stop injecting fuel; and sending the overtime signal to the generator control unit so that the generator control unit generates a fourth control instruction under the condition that the second fault signal and the overtime signal are received, wherein the fourth control instruction is an instruction for controlling the output torque of the generator to be 0.

Optionally, after causing the engine control unit to further control the engine to stop injecting fuel and causing the generator control unit to further control the output torque of the generator to be 0, the control method further includes: receiving the current information sent by the current sensor to obtain current information, wherein the current information is obtained after the engine stops injecting fuel oil and the output torque of the generator is 0, the current of an electric connection loop of the electric control system and the battery system, and the current information comprises a current value and a current direction; and controlling the electric connection loop of the electric control system and the battery system to be closed at least under the condition that the current direction is the first direction and the current value is larger than 0 and smaller than or equal to the second preset threshold value.

Optionally, at least in a case that the current direction is the first direction and the current value is greater than 0 and less than or equal to the second preset threshold, controlling the electric connection loop of the electric control system and the battery system to be closed includes: and controlling the electric connection loop of the electric control system and the battery system to be closed under the condition that the current direction is the first direction, the current value is larger than 0 and smaller than or equal to the second preset threshold value, and the duration time of the current value which is larger than 0 and smaller than or equal to the second preset threshold value is larger than a second preset time period, wherein the second preset threshold value is smaller than the first preset threshold value.

Optionally, the control method further includes: generating a third fault signal when the current direction is the first direction, the current value is greater than 0 and less than or equal to a second preset threshold, the current value is in the first direction, the duration time of the current value is greater than 0 and less than or equal to a second preset threshold is greater than a third preset time period, wherein the third fault signal indicates that the fault degree of the engine is a three-level fault, the fault degree further comprises a first-level fault and a second-level fault, the fault degree of the first-level fault is greater than the second-level fault, the fault degree of the second-level fault is greater than the third-level fault, and the second preset threshold is smaller than the first preset threshold; and sending the third fault signal to an engine control unit and a generator control unit to warn.

According to another aspect of the present application, there is provided a control device of a range extender system of a vehicle including at least an engine, an electric control system and a battery system, the engine and the electric control system being electrically connected, the electric control system and the battery system being electrically connected, the battery system including a current sensor, the control device comprising: a receiving unit, configured to receive current information sent by the current sensor, where the current sensor is configured to measure a magnitude and a direction of a current, the current information is obtained by the current sensor measuring a current of an electrical connection loop between the electrical control system and the battery system, the current information includes a current direction and a current value, the current direction includes a first direction and a second direction, and a direction of the first direction and the second direction is opposite, the current direction is the first direction when the engine is reversed, and the current direction is the second direction when the engine is not reversed; and the control unit is used for controlling the electric control system to be disconnected from the electric connection loop of the battery system under the condition that the current direction is the first direction and the current value is larger than a first preset threshold value.

According to still another aspect of the present application, there is provided a computer-readable storage medium including a stored program, wherein the program, when executed, controls a device in which the computer-readable storage medium is located to perform any one of the control methods.

According to still another aspect of the present application, there is provided an electronic apparatus including: one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs comprising instructions for performing any one of the control methods.

By means of the technical scheme, the electric control system and the electric connection loop of the battery system are measured through the current sensor in the battery system of the vehicle, current information measured by the current sensor is received, the current information comprises a current direction and a current value, when the current direction is the first direction, the reverse rotation of the engine is indicated, when the current value is larger than a first preset threshold value, the current value of the reverse rotation condition of the engine is indicated to exceed the first preset threshold value, the connection loop of the electric control system and the battery system is controlled to be disconnected, the battery system is stopped to supply power to the electric control system, the engine is further stopped to continue the reverse rotation, and vehicle faults caused by the reverse rotation of the engine are avoided. Compared with the method for detecting the rotating speed of the engine and judging whether the engine is reversed or not through the rotating speed detection device in the prior art, the current sensor is far smaller than the rotating speed detection device in size, does not occupy excessive space in a vehicle, is more suitable for detecting the reversing of the engine of the vehicle, and is faster in response speed through the method for controlling the disconnection of the loop through detecting the current. Therefore, the problem that the detection method of the engine reverse rotation occupies more vehicle space in the prior art can be solved, and the purpose of saving the vehicle space is achieved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

fig. 1 is a block diagram of a hardware configuration of a mobile terminal for executing a control method of a range extender system of a vehicle according to an embodiment of the present application;

fig. 2 is a schematic flow chart of a control method of a range extender system of a vehicle according to an embodiment of the present application;

FIG. 3 is a schematic diagram illustrating a connection relationship of a range extender system of a vehicle according to an embodiment of the present disclosure;

FIG. 4 is a flow chart of a method for controlling a range extender system of a specific vehicle according to an embodiment of the present application;

fig. 5 shows a block diagram of a control device of a range extender system of a vehicle according to an embodiment of the present application.

Wherein the above figures include the following reference numerals:

102. a processor; 104. a memory; 106. a transmission device; 108. an input-output device; 100. a starter; 200. an engine; 300. a generator; 400. an electric control system; 500. a battery system.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

For convenience of description, the following will describe some terms or terms related to the embodiments of the present application:

extended range power generation system: the three-phase power generated by the generator is converted into direct current through the electric control system, and the direct current direction is from the electric control system to the battery system in a normal mode.

Hall sensor: the device for acquiring the current value by utilizing the magneto-electric effect can judge the magnitude and the direction of the current and is widely applied to the electronic fields of industry, automobile industry and the like.

As described in the background art, in order to solve the problem that the method and the device for detecting the reverse rotation of the engine occupy more vehicle space in the prior art, the embodiments of the present application provide a control method, a control device, a computer-readable storage medium, and an electronic device for a range extender system of a vehicle.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The method embodiments provided in the embodiments of the present application may be performed in a mobile terminal, a computer terminal or similar computing device. Taking a mobile terminal as an example, fig. 1 is a block diagram of a hardware structure of a mobile terminal of a control method of a range extender system of a vehicle according to an embodiment of the present invention. As shown in fig. 1, a mobile terminal may include one or more (only one is shown in fig. 1) processors 102 (the processor 102 may include, but is not limited to, a microprocessor MCU or a processing device such as a programmable logic device FPGA) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 for communication functions and an input-output device 108. It will be appreciated by those skilled in the art that the structure shown in fig. 1 is merely illustrative and not limiting of the structure of the mobile terminal described above. For example, the mobile terminal may also include more or fewer components than shown in fig. 1, or have a different configuration than shown in fig. 1.

The memory 104 may be used to store a computer program, for example, a software program of application software and a module, such as a computer program corresponding to a control method of a range extender system of a vehicle in an embodiment of the present invention, and the processor 102 executes the computer program stored in the memory 104 to perform various functional applications and data processing, that is, to implement the above-mentioned method. Memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory remotely located relative to the processor 102, which may be connected to the mobile terminal via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof. The transmission device 106 is used to receive or transmit data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, simply referred to as NIC) that can connect to other network devices through a base station to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module, which is configured to communicate with the internet wirelessly.

In the present embodiment, there is provided a control method of a range extender system of a vehicle operating on a mobile terminal, a computer terminal or the like, it is to be noted that the steps shown in the flowchart of the drawings may be executed in a computer system such as a set of computer executable instructions, and that although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in an order different from that shown or described herein.

Fig. 2 is a flowchart of a control method of a range extender system of a vehicle according to an embodiment of the present application, where the vehicle includes at least an engine, an electric control system, and a battery system, that is, the vehicle includes the range extender system, the engine is electrically connected to the electric control system, the electric control system is electrically connected to the battery system, and the battery system includes a current sensor, as shown in fig. 2, and the method includes the steps of:

step S201, receiving current information sent by the current sensor, wherein the current sensor is used for measuring the magnitude and the direction of current, the current information is obtained by measuring the current of an electric connection loop of the electric control system and the battery system by the current sensor, the current information comprises a current direction and a current value, the current direction comprises a first direction and a second direction, the direction of the first direction is opposite to the direction of the second direction, the current direction is the first direction when the engine is reversed, and the current direction is the second direction when the engine is not reversed;

Specifically, the extended-range power generation system mainly comprises a starter, an engine, a generator, an electric control system, a battery system and other parts, and in a normal power generation mode of the extended-range power generation system of the vehicle, the energy transmission route is unique, namely the current transmission direction is unique, the engine drives the generator to operate to generate three-phase electricity, the three-phase electricity is converted into direct current through the electric control system, and the direct current flows from the electric control system to the battery system. When the electric control system is disturbed to generate abnormality under the abnormal condition or the program design of an MCU (micro control unit, microcontroller Unit, abbreviated as MCU) has BUG and all inexhaustible fault reasons, the faults cause the battery system to output reverse current to the electric control system, at the moment, the generator is converted into a driving mode from a power generation mode, the generator actively outputs energy to the outside to drive the engine to reverse, and serious damage to the engine can be generated under the condition. According to the unidirectional property of energy or current transmission, the electric control system in the step S201 is provided with a current sensor for detecting the current of the electric control system and the battery system, and in the specific implementation process, the current sensor may be a hall sensor, and further comprises a current divider and other devices for detecting the magnitude and direction of the current. The current flows from the electric control system to the battery system in the normal mode, that is, the direction of the current is the second direction when the engine rotates forward, that is, the direction of the current is the second direction when the engine rotates not in reverse, and flows from the battery system to the electric control system in the abnormal mode, that is, the direction of the current is the first direction when the engine rotates in reverse, that is, the first direction and the second direction are opposite directions, and the current sensor monitors the electric connection loop of the electric control system and the battery system in real time to obtain the direction of the current and the current value, that is, the magnitude of the current.

Step S202, controlling the electric control system to disconnect the electric connection loop of the battery system when the current direction is the first direction and the current value is greater than a first preset threshold.

Specifically, since the first direction indicates motor reversal, but the magnitude of the current is different and the damage degree of the corresponding motor reversal is different, the circuit disconnection of the electric control system and the battery system is controlled only when the current direction is the first direction and the magnitude of the current, that is, the current value is greater than the first preset threshold. Because the engine is mechanically connected with the generator, the generator is electrically connected with the electric control system, the electric control system is electrically connected with the battery system, and the connection between the battery and the electric control system is cut off through the steps, so that the reverse output of the current or energy of the battery system to the electric control system is avoided, and the generator stops running under the condition of no energy output of the battery system, so that the further damage to the engine is avoided.

According to the embodiment, the current of the electric control system and the electric connection loop of the battery system of the vehicle is measured through the current sensor, the current information measured by the current sensor is received, the current information comprises the current direction and the current value, when the current direction is the first direction, the engine is indicated to be reversed, when the current value is larger than the first preset threshold value, the current value under the condition that the engine is reversed is indicated to exceed the first preset threshold value, the connection loop of the electric control system and the battery system is controlled to be disconnected, the power supply of the battery system to the electric control system is stopped, the engine is further stopped, and the vehicle fault caused by the engine reversal is avoided. Compared with the method for detecting the rotating speed of the engine and judging whether the engine is reversed or not through the rotating speed detection device in the prior art, the current sensor is far smaller than the rotating speed detection device in size, does not occupy excessive space in a vehicle, is more suitable for detecting the reversing of the engine of the vehicle, and is faster in response speed through the method for controlling the disconnection of the loop through detecting the current. Therefore, the problem that the detection method of the engine reverse rotation occupies more vehicle space in the prior art can be solved, and the purpose of saving the vehicle space is achieved.

In a specific implementation process, the vehicle further includes a generator, where the generator is mechanically connected to the engine, and the step S202 further includes the following steps: generating a first fault signal, and sending the first fault signal to an engine control unit so that the engine control unit generates a first control command when receiving the first fault signal, wherein the first fault signal indicates that the fault degree of the engine is a first-level fault, the fault degree also comprises a second-level fault and a third-level fault, the fault degree of the first-level fault is greater than the second-level fault, the fault degree of the second-level fault is greater than the third-level fault, and the first control command is a command for controlling the engine to stop injecting fuel; and sending the first fault signal to a generator control unit so that the generator control unit generates a second control command when receiving the first fault signal, wherein the second control command is a command for controlling the output torque of the generator to be 0. According to the method, when the current value of the engine is larger than the first preset threshold value, the connecting loop is disconnected, and meanwhile, a first fault signal is generated and sent to the engine control unit and the generator control unit, so that corresponding control instructions can be generated by the engine and the generator under the condition that primary faults occur, the engine and the generator are further controlled to stop working, and the damage to the engine, the generator and other elements of the vehicle caused by continuous working of the generator and the engine under the condition of primary faults is avoided.

Specifically, the extended-range power generation system mainly comprises a starter, an engine, a generator, an electric control system, a battery system and other parts, wherein the starter is mechanically connected with the engine, the engine is mechanically connected with the generator, the generator is electrically connected with the electric control system, and the electric control system is electrically connected with the battery system. The magnitude of the current, i.e., the magnitude of the current value, when the engine is reversed is different, and the degree of damage to the vehicle is also different, so that the degree of failure is divided into a primary failure, a secondary failure and a tertiary failure, the degree of failure of the primary failure is greater than that of the secondary failure, and the degree of failure of the secondary failure is greater than that of the tertiary failure. When the current direction is the first direction and the current value is larger than a first preset threshold value, a first fault signal is generated in addition to controlling the electric control system to be disconnected from the electric connection loop of the battery system and is sent to the engine and the generator to inform the engine and the generator that the magnitude of the current in the first direction, namely the reverse direction, exceeds the first preset threshold value, a first-stage fault occurs, the engine control unit generates a first control command to control the engine to stop the fuel oil injection operation, and the generator control unit generates a second control command to control the output torque of the generator to be 0. Through the steps, the electric control system is disconnected from the electric connection loop of the battery system, the battery system can not output current or energy to the electric control system, further, the engine and the generator respectively stop working, and under the condition that the engine is reversed and has primary faults, the reverse rotation of the engine can be stopped in time, and the greater damage to the vehicle system is avoided.

In order to control the vehicle system more accurately, the control method of the present application further includes the steps of: generating a second fault signal when the current direction is the first direction and the current value is greater than a second preset threshold value and less than or equal to the first preset threshold value, wherein the second fault signal indicates that the fault degree of the engine is a second-level fault, the fault degree further comprises a first-level fault and a third-level fault, the fault degree of the first-level fault is greater than the second-level fault, the fault degree of the second-level fault is greater than the third-level fault, and the second preset threshold value is smaller than the first preset threshold value; and sending the second fault signal to an engine control unit and a generator control unit so that the engine control unit controls the engine to stop injecting fuel according to at least the second fault signal. According to the method, under the condition that the reverse current value is larger than the second preset threshold value and smaller than or equal to the first preset threshold value, a second fault signal is generated and sent to the engine and the generator, and as damage to vehicle elements caused by different fault levels is different, corresponding processing actions are also different, the engine and the generator respond to the second fault signal in a different mode than the first fault signal, and therefore a vehicle system can be controlled more accurately, and further damage to a vehicle caused by excessive reaction or insufficient reaction is avoided.

In the specific implementation process, when the current direction is the first direction, namely the reverse direction, and when the current magnitude, namely the current value, is larger than a second preset threshold value and smaller than or equal to the first preset threshold value, a second fault signal is generated and sent to the generator and the engine to inform the engine and the generator that the current fault level is a secondary fault, the engine control unit controls the generator to stop injecting fuel under the condition of at least the secondary fault, and the generator control unit controls the generator to output torque to be 0. Since the level of failure of the secondary failure is lower than that of the primary failure, in the case of the secondary failure, the engine and the generator do not immediately stop the respective operations (stop of fuel injection and output torque of 0), but further determination of whether to stop the operations, i.e., the respective actions are made at least based on the second failure signal, is also required.

In some optional embodiments, the controlling the engine to stop injecting fuel according to at least the second fault signal by the engine control unit, and controlling the output torque of the generator to be 0 according to at least the second fault signal by the generator control unit includes: determining a duration of said secondary failure of said engine; generating a timeout signal when the duration is greater than a first predetermined time period, and transmitting the timeout signal to the engine control unit, so that the engine control unit generates a third control command when receiving the second fault signal and the timeout signal, wherein the third control command is a command for controlling the engine to stop injecting fuel; and sending the timeout signal to the generator control unit, so that the generator control unit generates a fourth control command when receiving the second fault signal and the timeout signal, wherein the fourth control command is a command for controlling the output torque of the generator to be 0. In the case of a secondary failure, the method determines the duration of the secondary failure because the engine and the generator do not immediately act, and further responds according to the duration, so that the engine and the generator can react again to more accurately control the engine and the motor of the vehicle in the case of the secondary failure lasting for more than a certain time.

Specifically, on the premise that the above step determines that the secondary fault is present, recording the duration of the secondary fault to obtain the duration, where the duration is greater than a first predetermined time period, the first predetermined time period is assumed to be t ₁ The duration is denoted by t, i.e. t>t ₁ In the event that a timeout signal is generated and sent to the engine control unit and the generator control unit informing the generator control unit and the engine control unit that the duration of the secondary failure exceeds a first predetermined period of time, a need existsFurther actions are made, namely the engine control unit generates a third control command to control the engine to stop injecting fuel, and the generator control unit generates a fourth control command to control the generator output torque to be 0.

In order to control operations of an engine, a generator, and the like in a vehicle according to a real-time magnitude of reverse current more flexibly, in some alternative embodiments, after the engine control unit is caused to further control the engine to stop injecting fuel and the generator control unit is caused to further control an output torque of the generator to 0, the control method further includes: receiving the current information sent by the current sensor to obtain current information, wherein the current information is obtained after the engine stops injecting fuel oil and the output torque of the generator is 0, the current of the electric connection loop of the electric control system and the battery system, and the current information comprises a current value and a current direction; and controlling the electric connection loop of the electric control system and the battery system to be closed at least when the current direction is the first direction and the current value is more than 0 and less than or equal to the second preset threshold value. According to the method, the direction and the magnitude of the current, namely the current information, are monitored in real time through the current sensor, when the reverse current value is reduced to be lower than a second preset threshold value, the fault degree is reduced, an electrically connected loop can be closed, the operation of the vehicle can be flexibly controlled according to the current value of the electrically connected loop, and the vehicle can be rapidly controlled in real time.

In the specific implementation process, under the condition of a secondary fault, the engine and the generator stop working, namely the engine stops injecting oil, the output torque of the generator is 0, the current sensor is assumed to be the Hall sensor, the Hall sensor measures the current value of an electric connection loop of the electric control system and the battery system in real time to obtain current information, the current information and the current information also comprise current directions and current values, namely the current value and the current direction, and when the current value is detected to be smaller than or equal to a second preset threshold value, the condition that the electric connection loop of the electric control system and the battery system can be closed is provided, but the loop is not closed immediately, so that the operation of the vehicle is restored, and whether the condition is continuously met is further judged. The second preset threshold value is smaller than the first preset threshold value, and the first preset threshold value and the second preset threshold value are determined according to the operation of the actual vehicle and the damage degree of different reverse currents to the vehicle, namely the first preset threshold value and the second preset threshold value are not limited.

In some optional embodiments, at least in a case where the current direction is the first direction and the current value is greater than 0 and less than or equal to the second preset threshold, controlling the electric connection loop between the electric control system and the battery system to be closed includes: and controlling the electric connection loop of the electric control system and the battery system to be closed when the current direction is the first direction, the current value is larger than 0 and smaller than or equal to the second preset threshold value, and the duration time of the current value is larger than 0 and smaller than or equal to the second preset threshold value is larger than a second preset time period, wherein the second preset threshold value is smaller than the first preset threshold value. Under the condition that the reverse current value is reduced to a second preset threshold value, whether the reverse current value is continuously lower than the second preset threshold value or not is further determined, so that the electric connection loop is closed on the premise that the reverse current value cannot cause larger damage, and the problem that the magnitude of the reverse current value is unstable and further damage is caused to a vehicle is avoided.

Specifically, in the case of a secondary fault, and the magnitude of the reverse current has been reduced to a second preset threshold, the time when the reverse current is lower than the second preset threshold is monitored, and if the duration of the reverse current lower than the second preset threshold is longer than a second preset time period, it indicates that the reverse current has been stable and relatively small, and no significant damage is caused to the generator and the motor, so that the electric connection loop of the electric control system and the battery system is closed, and the operation of the vehicle is resumed.

In order to more precisely control the engine, the generator, the battery system and other elements in the vehicle, the control method further comprises the following steps: generating a third fault signal when the current direction is the first direction and the current value is greater than 0 and less than or equal to a second preset threshold value and the duration of the first direction and the current value is greater than 0 and less than or equal to the second preset threshold value is greater than a third preset time period, wherein the third fault signal indicates that the fault degree of the engine is a three-level fault, the fault degree further comprises a first-level fault and a second-level fault, the fault degree of the first-level fault is greater than the second-level fault, the fault degree of the second-level fault is greater than the third-level fault, and the second preset threshold value is less than the first preset threshold value; and sending the third fault signal to an engine control unit and a generator control unit to warn. According to the method, when the current value measured by the current sensor received at the beginning is smaller than or equal to the second preset threshold value, only the third fault signal is generated and sent to the engine control unit and the generator control unit, so that when the magnitude of the reverse current value is insufficient to damage the engine and the generator, the engine and the generator are stopped by warning only through the third fault signal without taking specific measures, and the engine, the generator, a battery system and other elements in the vehicle can be controlled more accurately and flexibly.

In the specific implementation process, as the failure degree of the primary failure is greater than that of the secondary failure, the failure degree of the secondary failure is greater than that of the tertiary failure, and when the primary failure occurs, a loop is directly disconnected and the operation of an engine and a generator is stopped; when the secondary fault occurs, whether the loop needs to be disconnected and the operation of the engine and the generator is stopped is further judged, and when the corresponding condition is met, the loop is closed, and the operation is recovered; in the case of a three-level fault, the degree of the fault is small, and the continuous operation of the loop does not cause the fault of the engine or the generator, but the duration is also required to be judged, so that when the current value is greater than 0 and less than or equal to a second preset threshold value and the duration of the current value in the first direction is greater than 0 and less than or equal to the second preset threshold value is greater than a third preset time period, a third fault signal is generated and sent to the engine control unit and the generator control unit to warn, and no further action is performed.

In order to enable those skilled in the art to more clearly understand the technical solutions of the present application, the implementation process of the control method of the range extender system of the vehicle of the present application will be described in detail below with reference to specific embodiments.

The connection relation of the range extender system is shown in fig. 3, the range extender system, namely the range extender power generation system, mainly comprises a starter 100, an engine 200, a generator 300, an electric control system 400, a battery system 500 and other parts, the starter 100 is mechanically connected with the engine 200, the engine 200 is mechanically connected with the generator 300, the generator 300 is electrically connected with the electric control system 400, the electric control system 400 is electrically connected with the battery system 500, and in the normal power generation mode of the range extender power generation system of the vehicle, the energy transmission route is that the engine 200 drives the generator 300 to operate to generate three-phase electricity, the three-phase electricity is converted into direct current through the electric control system 400, and the direct current flows from the electric control system 400 to the battery system 500.

The embodiment relates to a control method of a range extender system of a specific vehicle, as shown in fig. 4, including the following steps:

step S1: reading a current value, and defining the original current direction as a negative value (second direction);

step S2: judging whether the current I is greater than 0 (first direction), and if not, not performing treatment;

step S3: in the case of yes, at I (current value)>I ₂ In case of (first preset threshold value), it is determined as a serious fault (first order fault), firstly, a BMS (battery management system, battery Management System, abbreviated as BMS) or MCU is reported, then, the generator is purged (output torque is 0), the motor stops injecting fuel (fuel injection is stopped), and finally, the main circuit relay of the battery system (electric control system and the above battery system are disconnected An electrical connection loop), at which time the primary failure cannot be automatically eliminated, requiring manual handling by a worker and elimination of the failure;

step S4: at I ₁ (second preset threshold)<I≤I ₂ In case of (a first preset threshold), determining as a general fault (a secondary fault) and reporting the BMS or the MCU;

step S5: duration of the above-mentioned secondary failure>t ₁ In case of (first predetermined period of time) the generator torque, the motor stops injecting fuel, opening the main circuit relay of the battery system;

step S6: when the reverse current is reduced to I ₁ The duration exceeds t and is as follows ₂ (a second predetermined period of time) the fault is automatically cleared and the main circuit relay control (controlling the closing of the electrical connection circuit of the electrical control system and the battery system) can be actively restored;

step S7: at 0<I≤I ₁ (second preset threshold) and greater than t ₃ In case of (the third predetermined period), a slight failure (three-level failure) is determined and reported to the BMS or the MCU without processing.

The embodiment of the application also provides a control device of the range extender system of the vehicle, and the control device of the range extender system of the vehicle can be used for executing the control method of the range extender system of the vehicle. The device is used for realizing the above embodiments and preferred embodiments, and is not described in detail. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. While the means described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.

The following describes a control device of a range extender system of a vehicle provided in an embodiment of the present application.

Fig. 5 is a schematic view of a control device of a range extender system of a vehicle according to an embodiment of the present application, as shown in fig. 5, the vehicle at least includes an engine, an electric control system, and a battery system, that is, the vehicle includes the range extender system, the engine and the electric control system are electrically connected, the electric control system and the battery system are electrically connected, the battery system includes a current sensor, the device includes:

a receiving unit 10 configured to receive current information transmitted from the current sensor, wherein the current sensor is configured to measure a magnitude and a direction of a current, the current information is obtained by the current sensor measuring a current of an electrical connection circuit between the electrical control system and the battery system, the current information includes a current direction and a current value, the current direction includes a first direction and a second direction, and the direction of the first direction and the direction of the second direction are opposite, the current direction is the first direction when the motor is reversed, and the current direction is the second direction when the motor is not reversed;

And a control unit 20 configured to control the electric control system to disconnect from the electric connection circuit of the battery system when the current direction is the first direction and the current value is greater than a first preset threshold.

According to the embodiment, the current of the electric control system and the electric connection loop of the battery system of the vehicle is measured through the current sensor, the current information measured by the current sensor is received, the current information comprises the current direction and the current value, when the current direction is the first direction, the engine is indicated to be reversed, when the current value is larger than the first preset threshold value, the current value under the condition that the engine is reversed is indicated to exceed the first preset threshold value, the connection loop of the electric control system and the battery system is controlled to be disconnected, the power supply of the battery system to the electric control system is stopped, the engine is further stopped, and the vehicle fault caused by the engine reversal is avoided. Compared with the device for detecting the rotating speed of the engine and judging whether the engine is reversed or not through the rotating speed detecting device in the prior art, the current sensor is far smaller than the rotating speed detecting device, does not occupy excessive space in a vehicle, is more suitable for detecting the reversing of the engine of the vehicle, and is faster in response speed through detecting current to control the device for disconnecting the loop. Therefore, the problem that the detection device for the engine reversion occupies more vehicle space in the prior art can be solved, and the purpose of saving the vehicle space is achieved.

In a specific implementation process, the vehicle further comprises a generator, the generator is mechanically connected with the engine, the control unit comprises a first generation module and a second generation module, the first generation module is used for generating a first fault signal, the first fault signal is sent to the engine control unit, so that the engine control unit generates a first control instruction under the condition that the first fault signal is received, the first fault signal indicates that the fault degree of the engine is a primary fault, the fault degree further comprises a secondary fault and a tertiary fault, the fault degree of the primary fault is greater than the secondary fault, the fault degree of the secondary fault is greater than the tertiary fault, and the first control instruction is an instruction for controlling the engine to stop injecting fuel; the second generation module is configured to send the first fault signal to a generator control unit, so that the generator control unit generates a second control instruction when receiving the first fault signal, where the second control instruction is an instruction for controlling an output torque of the generator to be 0. When the current value of the engine is larger than a first preset threshold value, the device also generates a first fault signal and sends the first fault signal to the engine control unit and the generator control unit while disconnecting the connection loop, so that the engine and the generator can generate corresponding control instructions under the condition of primary faults, and further the engine and the generator are controlled to stop working, and the damage to the engine, the generator and other elements of the vehicle caused by continuous working of the generator and the engine under the condition of primary faults is avoided.

In order to control a vehicle system more accurately, the control device of the present application further includes a first generating unit and a first sending unit, where the first generating unit is configured to generate a second fault signal when the current direction is the first direction and the current value is greater than a second preset threshold and less than or equal to the first preset threshold, where the second fault signal indicates that a fault degree of the engine is a second fault, the fault degree further includes a first-stage fault and a third-stage fault, the fault degree of the first-stage fault is greater than the second-stage fault, the fault degree of the second-stage fault is greater than the third-stage fault, and the second preset threshold is less than the first preset threshold; the first sending unit is used for sending the second fault signal to the engine control unit and the generator control unit so that the engine control unit controls the engine to stop injecting fuel according to at least the second fault signal. The device generates a second fault signal and sends the second fault signal to the engine and the generator under the condition that the reverse current value is larger than a second preset threshold value and smaller than or equal to the first preset threshold value, and as the damage to the vehicle element caused by different fault levels is different, corresponding processing actions are also different, the engine and the generator respond differently to the first fault signal according to the second fault signal, so that the vehicle system can be controlled more accurately, and further damage to the vehicle caused by excessive reaction or insufficient reaction is avoided.

In some alternative embodiments, the sending unit includes a determining module, a first sending module, and a second sending module, where the determining module is configured to determine a duration of the secondary failure of the engine; the first sending module is configured to generate a timeout signal when the duration period is greater than a first predetermined period, and send the timeout signal to the engine control unit, so that the engine control unit generates a third control instruction when receiving the second fault signal and the timeout signal, where the third control instruction is an instruction for controlling the engine to stop injecting fuel; the second sending module is configured to send the timeout signal to the generator control unit, so that the generator control unit generates a fourth control command when receiving the second fault signal and the timeout signal, where the fourth control command is a command for controlling an output torque of the generator to be 0. In the case of a secondary failure, the device determines the duration of the secondary failure because the engine and the generator do not immediately act, and responds further according to the duration, so that the engine and the generator can react again to control the engine and the motor of the vehicle more accurately in the case of the secondary failure lasting for more than a certain time.

Specifically, on the premise that the above step determines that the secondary fault is present, recording the duration of the secondary fault to obtain the duration, where the duration is greater than a first predetermined time period, the first predetermined time period is assumed to be t ₁ The duration is denoted by t, i.e. t>t ₁ And (3) generating a timeout signal, sending the timeout signal to the engine control unit and the generator control unit, informing the generator control unit and the engine control unit that the duration of the secondary failure exceeds the first preset time period, and further actions need to be taken, namely the engine control unit generates a third control command to control the engine to stop injecting fuel, and the generator control unit generates a fourth control command to control the generator to output torque to be 0.

In order to control the operation of the engine, the generator, etc. in the vehicle according to the real-time magnitude of the reverse current more flexibly, in some alternative embodiments, the transmitting unit further comprises a receiving module and a control module, wherein the receiving module is used for receiving the current information sent by the current sensor, obtaining current information, wherein the current information is obtained after the engine stops injecting fuel and the output torque of the generator is 0, the current of the electric connection loop of the electric control system and the battery system, and the current information comprises a current value and a current direction; the control module is used for controlling the electric connection loop of the electric control system and the battery system to be closed at least under the condition that the current direction is the first direction and the current value is more than 0 and less than or equal to the second preset threshold value. The device monitors the direction and the magnitude of the current in real time through the current sensor, namely the current information, when the reverse current value is reduced to be lower than a second preset threshold value, the fault degree is reduced, an electrically connected loop can be closed, the operation of the vehicle can be flexibly controlled according to the current value of the electrically connected loop, and the vehicle can be rapidly controlled in real time.

In some alternative embodiments, the control module includes a control submodule, configured to control the electrical connection loop between the electrical control system and the battery system to be closed when the current direction is the first direction and the current value is greater than 0 and less than or equal to the second preset threshold, and when the duration of the current value is greater than 0 and less than or equal to the second preset threshold is greater than a second predetermined period of time, where the second preset threshold is less than the first preset threshold. Under the condition that the reverse current value is reduced to a second preset threshold value, the device further determines whether the reverse current value is continuously lower than the second preset threshold value, so that the electric connection loop is closed on the premise that the reverse current value cannot cause larger damage, and the problem that the magnitude of the reverse current value is unstable and causes further damage to the vehicle is solved.

In order to more accurately control the engine, the generator, the battery system and other elements in the vehicle, the control device further comprises a second generation unit and a second transmission unit, wherein the second generation unit is used for generating a third fault signal when the current direction is the first direction and the current value is greater than 0 and less than or equal to a second preset threshold value and the duration time of the current value is greater than 0 and less than or equal to a second preset threshold value is greater than a third preset time period, the third fault signal represents that the fault degree of the engine is three-level fault, the fault degree further comprises first-level fault and second-level fault, the fault degree of the first-level fault is greater than the second-level fault, the fault degree of the second-level fault is greater than the third-level fault, and the second preset threshold value is less than the first preset threshold value; the second sending unit is used for sending the third fault signal to the engine control unit and the generator control unit so as to warn. When the current value measured by the current sensor received at the beginning is smaller than or equal to a second preset threshold value, the device only generates a third fault signal and sends the third fault signal to the engine control unit and the generator control unit, so that when the magnitude of the reverse current value is insufficient to damage the engine and the generator, the device only alarms through the third fault signal without taking specific measures to stop the operation of the engine and the generator, and the engine, the generator, a battery system and other elements in the vehicle can be controlled more accurately and flexibly.

The control device of the range extender system of the vehicle comprises a processor and a memory, wherein the receiving unit, the control unit and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions. The modules are all located in the same processor; alternatively, the above modules may be located in different processors in any combination.

The processor includes a kernel, and the kernel fetches the corresponding program unit from the memory. The kernel can be provided with one or more than one kernel, and the purpose of detecting whether the engine is reversed or not under the condition of not occupying the vehicle space is achieved by adjusting the kernel parameters.

The memory may include volatile memory, random Access Memory (RAM), and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM), among other forms in computer readable media, the memory including at least one memory chip.

The embodiment of the invention provides a computer readable storage medium, which comprises a stored program, wherein the program is used for controlling equipment where the computer readable storage medium is positioned to execute a control method of a range extender system of a vehicle.

Specifically, the control method of the range extender system of the vehicle includes:

The embodiment of the invention provides equipment, which comprises a processor, a memory and a program stored in the memory and capable of running on the processor, wherein the processor realizes at least the following steps when executing the program:

The device herein may be a server, PC, PAD, cell phone, etc.

The present application also provides a computer program product adapted to perform a program initialized with at least the following method steps when executed on a data processing device:

It will be appreciated by those skilled in the art that the modules or steps of the invention described above may be implemented in a general purpose computing device, they may be concentrated on a single computing device, or distributed across a network of computing devices, they may be implemented in program code executable by computing devices, so that they may be stored in a storage device for execution by computing devices, and in some cases, the steps shown or described may be performed in a different order than that shown or described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple modules or steps of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, etc., such as Read Only Memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.

Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.

From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

1) According to the control method of the range extender system of the vehicle, the current of the electric control system and the electric connection loop of the battery system of the vehicle is measured through the current sensor in the battery system of the vehicle, the current information measured by the current sensor is received, the current information comprises the current direction and the current value, when the current direction is the first direction, the reverse rotation of the engine is indicated, when the current value is larger than the first preset threshold value, the current value under the condition that the reverse rotation of the engine is indicated to be larger than the first preset threshold value, the connection loop of the electric control system and the battery system is controlled to be disconnected, the power supply of the battery system to the electric control system is stopped, the engine is further stopped, the reverse rotation is continued, and the vehicle fault caused by the reverse rotation of the engine is avoided. Compared with the method for detecting the rotating speed of the engine and judging whether the engine is reversed or not through the rotating speed detection device in the prior art, the current sensor is far smaller than the rotating speed detection device in size, does not occupy excessive space in a vehicle, is more suitable for detecting the reversing of the engine of the vehicle, and is faster in response speed through the method for controlling the disconnection of the loop through detecting the current. Therefore, the problem that the detection method of the engine reverse rotation occupies more vehicle space in the prior art can be solved, and the purpose of saving the vehicle space is achieved.

2) In the control device of the range extender system of the vehicle, the current of the electric control system and the electric connection loop of the battery system of the vehicle is measured through the current sensor in the battery system of the vehicle, the current information measured by the current sensor is received, the current information comprises the current direction and the current value, when the current direction is the first direction, the reverse rotation of the engine is indicated, when the current value is larger than the first preset threshold value, the current value under the condition that the reverse rotation of the engine is indicated to be larger than the first preset threshold value, the connection loop of the electric control system and the battery system is controlled to be disconnected, the power supply of the battery system to the electric control system is stopped, the engine is further stopped, the reverse rotation is continued, and the vehicle fault caused by the reverse rotation of the engine is avoided. Compared with the device for detecting the rotating speed of the engine and judging whether the engine is reversed or not through the rotating speed detecting device in the prior art, the current sensor is far smaller than the rotating speed detecting device, does not occupy excessive space in a vehicle, is more suitable for detecting the reversing of the engine of the vehicle, and is faster in response speed through detecting current to control the device for disconnecting the loop. Therefore, the problem that the detection device for the engine reversion occupies more vehicle space in the prior art can be solved, and the purpose of saving the vehicle space is achieved.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A control method of a range extender system of a vehicle, wherein the vehicle includes at least an engine, an electric control system and a battery system, the electric control system and the battery system being electrically connected, the battery system including a current sensor, the control method comprising:

receiving current information sent by the current sensor, wherein the current sensor is used for measuring the magnitude and the direction of current, the current information is obtained by measuring the current of an electric connection loop of the electric control system and the battery system by the current sensor, the current information comprises a current direction and a current value, the current direction comprises a first direction and a second direction, the directions of the first direction and the second direction are opposite, the current direction is the first direction under the condition that the engine is reversed, and the current direction is the second direction under the condition that the engine is not reversed;

And under the condition that the current direction is the first direction and the current value is larger than a first preset threshold value, the electric control system is controlled to be disconnected from the electric connection loop of the battery system.

2. The control method according to claim 1, characterized in that the vehicle further comprises a generator mechanically connected to the engine, and in the case that the current direction is the first direction and the current value is greater than a first preset threshold value, the control method further comprises:

generating a first fault signal, sending the first fault signal to an engine control unit, and enabling the engine control unit to generate a first control instruction under the condition that the first fault signal is received, wherein the first fault signal indicates that the fault degree of the engine is a first-level fault, the fault degree also comprises a second-level fault and a third-level fault, the fault degree of the first-level fault is larger than the second-level fault, the fault degree of the second-level fault is larger than the third-level fault, and the first control instruction is an instruction for controlling the engine to stop injecting fuel;

and sending the first fault signal to a generator control unit so that the generator control unit generates a second control instruction under the condition that the first fault signal is received, wherein the second control instruction is an instruction for controlling the output torque of the generator to be 0.

3. The control method according to claim 1, characterized in that the control method further comprises:

generating a second fault signal under the condition that the current direction is the first direction, the current value is larger than a second preset threshold value and smaller than or equal to the first preset threshold value, wherein the second fault signal indicates that the fault degree of the engine is a second-level fault, the fault degree also comprises a first-level fault and a third-level fault, the fault degree of the first-level fault is larger than the second-level fault, the fault degree of the second-level fault is larger than the third-level fault, and the second preset threshold value is smaller than the first preset threshold value;

the second fault signal is sent to an engine control unit and a generator control unit, so that the engine control unit controls the engine to stop injecting fuel according to at least the second fault signal, and the generator control unit controls the output torque of the generator to be 0 according to at least the second fault signal.

4. A control method according to claim 3, characterized in that causing the engine control unit to control the engine to stop injecting fuel according to at least the second failure signal, and causing the generator control unit to control the output torque of the generator to be 0 according to at least the second failure signal, comprises:

Determining a duration of the secondary failure of the engine;

generating a timeout signal when the duration period is greater than a first preset period, and sending the timeout signal to the engine control unit so that the engine control unit generates a third control instruction when receiving the second fault signal and the timeout signal, wherein the third control instruction is an instruction for controlling the engine to stop injecting fuel;

and sending the overtime signal to the generator control unit so that the generator control unit generates a fourth control instruction under the condition that the second fault signal and the overtime signal are received, wherein the fourth control instruction is an instruction for controlling the output torque of the generator to be 0.

5. The control method according to claim 4, characterized in that after causing the engine control unit to further control the engine to stop injecting fuel and causing the generator control unit to further control the output torque of the generator to be 0, the control method further comprises:

receiving the current information sent by the current sensor to obtain current information, wherein the current information is obtained after the engine stops injecting fuel oil and the output torque of the generator is 0, the current of an electric connection loop of the electric control system and the battery system, and the current information comprises a current value and a current direction;

And controlling the electric connection loop of the electric control system and the battery system to be closed at least under the condition that the current direction is the first direction and the current value is larger than 0 and smaller than or equal to the second preset threshold value.

6. The control method according to claim 5, characterized in that controlling the electric connection circuit of the electric control system and the battery system to be closed at least in the case where the present current direction is the first direction and the present current value is greater than 0 and less than or equal to the second preset threshold value, comprises:

and controlling the electric connection loop of the electric control system and the battery system to be closed under the condition that the current direction is the first direction, the current value is larger than 0 and smaller than or equal to the second preset threshold value, and the duration time of the current value which is larger than 0 and smaller than or equal to the second preset threshold value is larger than a second preset time period, wherein the second preset threshold value is smaller than the first preset threshold value.

7. The control method according to claim 1, characterized in that the control method further comprises:

Generating a third fault signal when the current direction is the first direction, the current value is greater than 0 and less than or equal to a second preset threshold, the current value is in the first direction, the duration time of the current value is greater than 0 and less than or equal to a second preset threshold is greater than a third preset time period, wherein the third fault signal indicates that the fault degree of the engine is a three-level fault, the fault degree further comprises a first-level fault and a second-level fault, the fault degree of the first-level fault is greater than the second-level fault, the fault degree of the second-level fault is greater than the third-level fault, and the second preset threshold is smaller than the first preset threshold;

and sending the third fault signal to an engine control unit and a generator control unit to warn.

8. A control device of a range extender system of a vehicle, wherein the vehicle at least comprises an engine, an electric control system and a battery system, the engine is electrically connected with the electric control system, the electric control system is electrically connected with the battery system, the battery system comprises a current sensor, and the control device comprises:

a receiving unit, configured to receive current information sent by the current sensor, where the current sensor is configured to measure a magnitude and a direction of a current, the current information is obtained by the current sensor measuring a current of an electrical connection loop between the electrical control system and the battery system, the current information includes a current direction and a current value, the current direction includes a first direction and a second direction, and a direction of the first direction and the second direction is opposite, the current direction is the first direction when the engine is reversed, and the current direction is the second direction when the engine is not reversed;

And the control unit is used for controlling the electric control system to be disconnected from the electric connection loop of the battery system under the condition that the current direction is the first direction and the current value is larger than a first preset threshold value.

9. A computer-readable storage medium, characterized in that the computer-readable storage medium includes a stored program, wherein the program, when run, controls a device in which the computer-readable storage medium is located to execute the control method according to any one of claims 1 to 7.

10. An electronic device, comprising: one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs comprising instructions for performing the control method of any of claims 1-7.