WO2023016122A1

WO2023016122A1 - Method for controlling engine, apparatus, vehicle control unit, and vehicle

Info

Publication number: WO2023016122A1
Application number: PCT/CN2022/102257
Authority: WO
Inventors: 林浩
Original assignee: 长城汽车股份有限公司
Priority date: 2021-08-11
Filing date: 2022-06-29
Publication date: 2023-02-16
Also published as: CN114643977A

Abstract

A method for controlling an engine, an apparatus (200), a vehicle control unit (3), and a vehicle (4). The method comprises: when an engine operating state of a target hybrid vehicle is a normal state, obtaining an output torque of the target hybrid vehicle, wherein the output torque at least comprises an electric generator torque; determining whether the output torque satisfies a preset torque balance condition; and if the output torque does not satisfy the preset torque balance condition, outputting a control instruction to restart the engine.

Description

Engine control method, device, vehicle controller and vehicle

This patent application claims priority to Chinese Patent Application No. CN202110920803.9 filed on August 11, 2021. The disclosure of the prior application is incorporated by reference in its entirety into this application.

technical field

The present application relates to the technical field of new energy vehicles, in particular to an engine control method, device, vehicle controller and vehicle.

Background technique

As the future development direction of the automotive industry, new energy vehicles are gradually recognized by users due to their excellent driving performance and the efficiency brought by the system architecture. As an important class of new energy vehicles, hybrid vehicles have better power performance and vehicle optimization efficiency, and have a wider audience.

As one of the important components of a hybrid vehicle, the normal operation of the engine is undoubtedly extremely important. In order to ensure the normal operation of the engine, the engine controller can report the engine working status signal to the vehicle controller, so that the vehicle controller can adjust the working status of the engine in time according to the current overall operation of the vehicle.

However, in the actual working process, sometimes the engine is in an abnormal working state but still reports a normal state signal, which greatly reduces the efficiency of the vehicle.

technical problem

The present application provides an engine control method, device, vehicle controller and vehicle to solve the problem of low vehicle efficiency caused by the engine being in an abnormal working state but still reporting a normal state signal.

technical solution

In a first aspect, an embodiment of the present application provides an engine control method, including:

When the engine working state of the target hybrid electric vehicle is in a normal state, the output torque of the target hybrid electric vehicle is obtained; wherein, the output torque includes at least the generator torque;

Judging whether the output torque meets the preset torque balance condition;

If the output torque does not satisfy the preset torque balance condition, a control instruction to restart the engine is output.

In a possible implementation manner, before judging whether the output torque satisfies a preset torque balance condition, the engine control method further includes:

Get the speed of the engine;

Correspondingly, it is judged whether the output torque satisfies the preset torque balance condition, including:

When the generator torque is greater than the preset generator torque threshold corresponding to the speed, it is judged that the output torque does not meet the preset torque balance condition;

When the generator torque is less than or equal to the preset generator torque threshold corresponding to the rotational speed, it is determined that the output torque satisfies the preset torque balance condition.

In a possible implementation manner, the output torque also includes engine torque;

Correspondingly, before judging whether the output torque satisfies the preset torque balance condition, the engine control method further includes:

Calculate the crankshaft end torque of the engine according to the generator torque, engine torque and the speed ratio of the engine and generator;

When the torque at the crankshaft end is greater than a preset torque threshold at the crankshaft end, it is judged that the output torque does not meet the preset torque balance condition;

When the torque at the crankshaft end is less than or equal to the preset torque threshold at the crankshaft end, it is determined that the output torque satisfies the preset torque balance condition.

obtaining the rotational speed of the engine; and, based on the generator torque, the engine torque and the speed ratio of the engine and the generator, calculating the crankshaft end torque of the engine;

When the generator torque is greater than the preset generator torque threshold corresponding to the rotational speed, and the crankshaft end torque is greater than the preset crankshaft end torque threshold, it is judged that the output torque does not meet the preset torque balance condition;

When the generator torque is less than or equal to the preset generator torque threshold corresponding to the rotational speed, and the crankshaft end torque is less than or equal to the preset crankshaft end torque threshold, it is determined that the output torque satisfies the preset torque balance condition.

In a possible implementation manner, the crankshaft end torque of the engine is calculated according to the generator torque, the engine torque, and the speed ratio of the engine and the generator, including:

Get the product value of generator torque and speed ratio;

The sum of the engine torque and the product value is determined as the crankshaft end torque.

In a possible implementation manner, the control instruction for restarting the engine is to modify the working state of the engine to an abnormal state, so that the engine controller restarts the engine based on the abnormal state.

In a second aspect, the embodiment of the present application provides an engine control device, including:

An acquisition module, configured to acquire the output torque of the target hybrid vehicle when the engine operating state of the target hybrid vehicle is in a normal state; wherein, the output torque includes at least generator torque;

A judging module, configured to judge whether the output torque satisfies a preset torque balance condition;

The control module is configured to output a control command to restart the engine if the output torque does not meet the preset torque balance condition.

In one possible implementation, the acquisition module is also used to:

Get the speed of the engine;

Correspondingly, the judging module is also used for:

Correspondingly, the engine control device also includes a calculation module for:

Correspondingly, the judging module is also used for:

Correspondingly, the acquisition module is also used to:

Get the speed of the engine;

Correspondingly, the judging module is also used for:

In a possible implementation, the calculation module is also used for:

Get the product value of generator torque and speed ratio;

In a third aspect, an embodiment of the present application provides a vehicle controller, including a memory, a processor, and a computer program stored in the memory and operable on the processor, and the processor executes the computer The program implements the steps of the method described in the first aspect.

In the fourth aspect, the embodiment of the present application provides a vehicle, including the vehicle controller as described in the third aspect

In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method described in the first aspect are implemented.

Beneficial effect

The embodiment of the present application provides an engine control method, device, vehicle controller and vehicle, and provides a preset torque balance condition for judging whether the engine is abnormal for the abnormal working conditions that cannot be detected by the engine, such as abnormal combustion . In this way, when the operating state of the engine of the target hybrid electric vehicle is normal, the output torque of the target hybrid electric vehicle can be acquired, and then it can be judged whether the output torque satisfies the preset torque balance condition. If the output torque does not meet the preset torque balance condition, the engine is considered to be abnormal, and then a control command to restart the engine can be output to restore the engine to normal operation, thereby avoiding the situation that the engine is in an abnormal working state but still reports a normal state signal. Not only improves the efficiency of the vehicle, but also improves the power of the vehicle.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the accompanying drawings that need to be used in the descriptions of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are only for the present application For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without paying creative efforts.

FIG. 1 is a flow chart of the steps of an engine control method provided by an embodiment of the present application;

Fig. 2 is a schematic structural diagram of an engine control device provided by an embodiment of the present application;

Fig. 3 is a schematic diagram of a vehicle controller provided by an embodiment of the present application;

Fig. 4 is a schematic diagram of a vehicle provided by an embodiment of the present application.

Embodiments of the present invention

In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

In order to make the purpose, technical solution and advantages of the present application clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

First, technical terms involved in the embodiments of the present application are introduced.

1. Engine controller.

The engine controller (Engine Control Unit, ECU) is an electronic device that controls the operation of various parts of the engine. The engine controller directly controls the fuel supply, fuel injection timing, ignition dwell angle, engine idle speed and The status of the vehicle's other accessory systems.

2. Vehicle controller.

The vehicle control unit (Vehicle Control Unit, VCU) is the core control part of the whole car, which is equivalent to the brain of the car. The vehicle controller is responsible for the normal driving of the vehicle, braking energy feedback, energy management of the vehicle engine and power battery, network management, fault diagnosis and processing, vehicle status monitoring, etc. It can collect motor and battery status, accelerator pedal signals, The brake pedal signal and other actuator sensor controller signals can be comprehensively analyzed according to the driver's driving intention to control the actions of the lower-level component controllers.

As described in related technologies, for hybrid vehicles, in order to ensure the normal operation of the engine, the engine controller can report the engine working status signal to the vehicle controller, so that the vehicle controller can If necessary, adjust the working state of the engine in time.

However, in the actual working process, the applicant found that sometimes the engine is in an abnormal working state but still reports a normal state signal.

Taking the series operation mode of a hybrid electric vehicle as an example, the situation that the engine cannot be detected to be in an abnormal working state is introduced. Wherein, the series operation mode refers to that the generator, the engine and the drive motor are connected in series on a power transmission line.

When the vehicle is in series operation mode, on the one hand, the vehicle controller will request a corresponding charging torque from the engine according to the charging power of the vehicle, that is, the engine torque; on the other hand, the vehicle controller can use the proportional integral control strategy Calculate the power generation torque of the generator, that is, the generator torque, to ensure that the engine speed can be at the set speed, so as to achieve stable power output. However, when the engine is actually in an abnormal working state but the abnormal working condition cannot be detected, such as the abnormal working condition of the engine combustion, the actual torque output by the engine is much smaller than the engine torque signal fed back. At this time, the vehicle controller needs to increase The output torque of the generator is large to maintain the engine speed, causing the engine to consume fuel but not complete the corresponding power output, which greatly reduces the efficiency of the vehicle. At the same time, it also leads to a decrease in series output power, which greatly reduces the available power of the vehicle and weakens the power of the vehicle.

In order to solve the problems in the prior art, embodiments of the present application provide an engine control method, device, vehicle controller and vehicle. The engine control method provided by the embodiment of the present application will be firstly introduced below.

The execution subject of the engine control method may be an engine control device, and the engine control device may be a control device with a processor and a memory, such as a vehicle controller. The following uses the vehicle controller as an example to introduce this application. For other types of control equipment, refer to the processing process of the vehicle controller, which will not be described in detail below.

Referring to Fig. 1, it shows the flow chart of the implementation of the engine control method provided by the embodiment of the present application, which is described in detail as follows:

Step 110 , if the engine operating state of the target hybrid electric vehicle is normal, obtain the output torque of the target hybrid electric vehicle.

Wherein, the output torque includes at least the generator torque.

In some embodiments, the target hybrid vehicle can be any hybrid vehicle, which is equipped with an engine controller and a vehicle controller, and the engine controller can report engine working status signals to the vehicle controller in real time or periodically.

When the vehicle controller receives a signal that the engine is in a normal working state, it can acquire the output torque such as the generator torque of the target hybrid electric vehicle. For example, the vehicle controller can obtain the generator torque from the generator controller (Motor Control Unit, MCU).

Step 120, judging whether the output torque satisfies a preset torque balance condition.

In some embodiments, the preset torque balance condition may be a condition for measuring whether the target hybrid electric vehicle is in torque balance. The applicant found that, for the abnormal working conditions that cannot be detected by the engine, such as abnormal combustion, the target hybrid electric vehicle is usually in a torque unbalanced state. Based on this, it is possible to detect whether the engine has an abnormal working condition that cannot be detected by preset torque balance conditions.

Optionally, an implementation of step 120 may be as follows: when the generator torque is greater than the preset generator torque threshold corresponding to the engine speed, it is judged that the output torque does not meet the preset torque balance condition; when the generator torque is less than Or when it is equal to the preset generator torque threshold corresponding to the engine speed, it is determined that the output torque satisfies the preset torque balance condition.

In some embodiments, when the engine is in a normal state, the power to rotate the engine will be provided by the engine, and when the engine is abnormal, part or all of the power to rotate will be provided by the generator. Based on this, when the generator torque exceeds its normal range, ie greater than the preset generator torque threshold, the engine can be considered to be in an abnormal state. In this way, the generator torque less than or equal to the preset generator torque threshold corresponding to the rotational speed of the engine may be used as the preset torque balance condition.

It is worth mentioning that different engine speeds correspond to different preset generator torque thresholds, and these preset generator torque thresholds can be empirical values in the industry or values calibrated based on actual vehicle tests. For example, the engine is stopped, the engine is pulled by the generator to different speeds, and the generator torques corresponding to different speeds are calibrated to the preset generator torque thresholds corresponding to the corresponding speeds.

Specifically, while obtaining the generator torque of the target hybrid electric vehicle, the rotational speed of the engine may be obtained, and then it is judged whether the output torque satisfies the corresponding preset torque balance condition.

Optionally, the output torque also includes engine torque. Correspondingly, another implementation of step 120 may be as follows: when the crankshaft end torque is greater than the preset crankshaft end torque threshold, it is judged that the output torque does not meet the preset torque balance condition ; When the torque at the crankshaft end is less than or equal to the preset torque threshold at the crankshaft end, it is determined that the output torque satisfies the preset torque balance condition.

In some embodiments, regardless of whether the engine is in a normal state or an abnormal state, the value of the crankshaft end torque of the engine is generally a value slightly larger than zero, but smaller than an upper limit value, ie, a preset crankshaft end torque threshold. Since the crankshaft end torque is related to the engine torque, generator torque and the speed ratio of the engine and generator under the actual working conditions, as long as the engine torque and generator torque are the real values under the actual working conditions, then the calculated crankshaft The value of the end torque must be less than the preset crankshaft end torque threshold. In addition, when the engine is in an unrecognizable abnormal state such as abnormal combustion, the engine controller will still send the engine torque when the engine is working normally to the vehicle controller. At this time, the engine torque sent by the engine controller is usually different from the actual working condition. The torque value under the condition does not match, and the difference is large, generally much larger than the torque value under the actual working condition. In addition, usually the generator torque sent by the generator controller is the torque value under real working conditions. Based on this, when the calculated crankshaft end torque value is greater than the preset crankshaft end torque threshold, it can be considered that the engine controller has sent an engine torque that is inconsistent with the actual working condition, and correspondingly, the engine can be considered to be in an abnormal state. In this way, the torque at the crankshaft end may be less than or equal to the preset torque threshold at the crankshaft end as the preset torque balance condition. Wherein, the speed ratio of the engine and the generator refers to the ratio of the rotation speed of the engine to the rotation speed of the generator.

Specifically, after the generator torque and engine torque of the target hybrid electric vehicle are obtained, the crankshaft end torque of the engine may be calculated according to the generator torque, the engine torque, and the speed ratio of the engine and the generator. Then it is judged whether the output torque satisfies the corresponding preset torque balance condition.

In some embodiments, the generator torque can be multiplied by the speed ratio first, and then the engine torque can be summed by the multiplied product, and the sum obtained by the sum is the crankshaft end torque.

Optionally, the above two preset torque balance conditions can also be used at the same time. Correspondingly, another implementation of step 120 can be as follows: when the generator torque is greater than the preset generator torque threshold corresponding to the speed, and the crankshaft end torque If it is greater than the preset crankshaft end torque threshold, it is judged that the output torque does not meet the preset torque balance condition; when the generator torque is less than or equal to the preset generator torque threshold corresponding to the speed, and the crankshaft end torque is less than or equal to the preset crankshaft end torque In the case of the torque threshold, it is judged that the output torque satisfies the preset torque balance condition.

In this way, by combining the above two preset torque balance conditions, misjudgment can be avoided and the accuracy of the judgment result can be improved.

It is worth mentioning that a time factor can also be added to the above various preset torque balance conditions to further improve the accuracy of the judgment result. Taking the preset torque balance condition that the generator torque is less than or equal to the preset generator torque threshold corresponding to the engine speed as an example, it can be modified to: the generator torque is continuously less than or equal to the preset generator torque threshold corresponding to the engine speed within the preset time period. Set the generator torque threshold. Wherein, the preset duration can be set according to the actual test, for example, 5 seconds or 10 seconds, which is not limited in this embodiment of the present application.

Step 130, if the output torque does not meet the preset torque balance condition, then output a control command to restart the engine.

In some embodiments, when it is judged that the output torque of the target hybrid electric vehicle does not satisfy the preset torque balance condition, a control instruction for restarting the engine may be output to the engine controller, so as to trigger the engine controller to restart the engine.

Specifically, the control instruction for restarting the engine may be to modify the working state of the engine to an abnormal state, so that the engine controller can detect that the engine is in an abnormal state, and then restart the engine.

In the embodiment of the present application, a preset torque balance condition for judging whether the engine is abnormal is given for abnormal engine conditions such as abnormal combustion that cannot be detected. In this way, when the operating state of the engine of the target hybrid electric vehicle is normal, the output torque of the target hybrid electric vehicle can be acquired, and then it can be judged whether the output torque satisfies the preset torque balance condition. If the output torque does not meet the preset torque balance condition, the engine is considered to be abnormal, and then a control command to restart the engine can be output to restore the engine to normal operation, thereby avoiding the situation that the engine is in an abnormal working state but still reports a normal state signal. Not only improves the efficiency of the vehicle, but also improves the power of the vehicle.

It should be understood that the sequence numbers of the steps in the above embodiments do not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiment of the present application.

The following are the device embodiments of this application. For the details that are not described in detail, you can refer to the corresponding method embodiments above. It should be considered that the details that are not described in detail in the device embodiments are the same as the method embodiments, and have been clearly recorded in the description .

Figure 2 shows a schematic structural view of the engine control device provided by the embodiment of the present application. For the convenience of description, only the parts related to the embodiment of the present application are shown, and the details are as follows:

As shown in Figure 2, the engine control device 200 includes:

The obtaining module 210 is used to obtain the output torque of the target hybrid electric vehicle when the engine operating state of the target hybrid electric vehicle is in a normal state; wherein, the output torque includes at least generator torque;

A judging module 220, configured to judge whether the output torque satisfies a preset torque balance condition;

The control module 230 is configured to output a control command to restart the engine if the output torque does not meet the preset torque balance condition.

In a possible implementation, the obtaining module 210 is also used to:

Get the speed of the engine;

Correspondingly, the judging module 220 is also used for:

Correspondingly, the obtaining module 210 is also used for:

Get the speed of the engine;

Correspondingly, the judging module 220 is also used for:

In a possible implementation, the calculation module is also used for:

Get the product value of generator torque and speed ratio;

The embodiment of the present application also provides a computer program product, which has a program code, and the program code executes the steps in any one of the above engine control method embodiments when running in a corresponding processor, controller, computing device or terminal, For example, step 110 to step 130 shown in FIG. 1 . Those skilled in the art should understand that the methods and related devices proposed in the embodiments of the present application can be implemented in various forms of hardware, software, firmware, special processors or combinations thereof. Special purpose processors may include Application Specific Integrated Circuits (ASICs), Reduced Instruction Set Computers (RISCs), and/or Field Programmable Gate Arrays (FPGAs). The proposed methods and devices are preferably implemented as a combination of hardware and software. The software is preferably installed as an application program on the program storage device. It is typically a computer platform based machine having hardware, such as one or more central processing units (CPUs), random access memory (RAM), and one or more input/output (I/O) interfaces. An operating system is also typically installed on the computer platform. Various procedures and functions described herein may be part of the application program, or a part thereof may be executed by the operating system.

Fig. 3 is a schematic diagram of the vehicle controller 3 provided by the embodiment of the present application. As shown in FIG. 3 , the vehicle controller 3 of this embodiment includes: a processor 30 , a memory 31 , and a computer program 32 stored in the memory 31 and operable on the processor 30 . When the processor 30 executes the computer program 32 , the steps in the above embodiments of the engine control method are implemented, such as steps 110 to 130 shown in FIG. 1 . Alternatively, when the processor 30 executes the computer program 32 , the functions of the modules in the above-mentioned device embodiments are implemented, for example, the functions of the modules 210 to 230 shown in FIG. 2 .

Exemplarily, the computer program 32 may be divided into one or more modules, and the one or more modules are stored in the memory 31 and executed by the processor 30 to complete the present application. The one or more modules may be a series of computer program instruction segments capable of accomplishing specific functions, and the instruction segments are used to describe the execution process of the computer program 32 in the vehicle controller 3 . For example, the computer program 32 may be divided into modules 210 to 230 shown in FIG. 2 .

The vehicle controller 3 may include, but not limited to, a processor 30 and a memory 31 . Those skilled in the art can understand that Fig. 3 is only an example of the vehicle controller 3, and does not constitute a limitation to the vehicle controller 3, and may include more or less components than those shown in the figure, or combine certain components, Or different components, for example, the vehicle controller may also include input and output devices, network access devices, buses, and the like.

The processor 30 may be a central processing unit (Central Processing Unit, CPU), and other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field-programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.

The memory 31 may be an internal storage unit of the vehicle controller 3 , such as a hard disk or memory of the vehicle controller 3 . The memory 31 can also be an external storage device of the vehicle controller 3, such as a plug-in hard disk equipped on the vehicle controller 3, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, flash memory card (Flash Card), etc. Further, the memory 31 may also include both an internal storage unit of the vehicle controller 3 and an external storage device. The memory 31 is used to store the computer program and other programs and data required by the vehicle controller. The memory 31 can also be used to temporarily store data that has been output or will be output.

The embodiment of the present application also provides a vehicle. As shown in FIG. 4 , the vehicle 4 includes the aforementioned vehicle controller 3 .

Those skilled in the art can clearly understand that for the convenience and brevity of description, only the division of the above-mentioned functional units and modules is used for illustration. In practical applications, the above-mentioned functions can be assigned to different functional units, Completion of modules means that the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment may be integrated into one processing unit, or each unit may exist separately physically, or two or more units may be integrated into one unit, and the above-mentioned integrated units may adopt hardware It can also be implemented in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the protection scope of the present application. For the specific working process of the units and modules in the above system, reference may be made to the corresponding process in the foregoing method embodiments, and details will not be repeated here.

In the above-mentioned embodiments, the descriptions of each embodiment have their own emphases, and for parts that are not detailed or recorded in a certain embodiment, refer to the relevant descriptions of other embodiments.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

In the embodiments provided in this application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the device/terminal device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units Or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated modules are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments in the present application can also be completed by instructing related hardware through computer programs. The computer programs can be stored in a computer-readable storage medium, and the computer When the program is executed by the processor, the steps of the above-mentioned embodiments of the engine control method can be realized. Wherein, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file or some intermediate form. The computer readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, removable hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory) , Random Access Memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the computer-readable medium may be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable Excludes electrical carrier signals and telecommunication signals.

Furthermore, the embodiments shown in the drawings of the present application or the features of the various embodiments mentioned in this specification are not necessarily to be understood as independent embodiments from each other. Rather, each feature described in one example of an embodiment can be combined with one or more other desired features from other embodiments to produce other embodiments that are not described in words or with reference to the figures.

The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still implement the foregoing embodiments Modifications to the technical solutions described in the examples, or equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the application, and should be included in the Within the protection scope of this application.

Claims

A method for controlling an engine, comprising:

When the engine operating state of the target hybrid electric vehicle is in a normal state, the output torque of the target hybrid electric vehicle is obtained; wherein, the output torque includes at least generator torque;

judging whether the output torque satisfies a preset torque balance condition;

If the output torque does not satisfy the preset torque balance condition, a control instruction to restart the engine is output.
The engine control method according to claim 1, wherein before said judging whether said output torque satisfies a preset torque balance condition, said method further comprises:

obtaining the rotational speed of the engine;

The judging whether the output torque satisfies the preset torque balance condition includes:

When the generator torque is greater than a preset generator torque threshold corresponding to the rotational speed, it is judged that the output torque does not satisfy the preset torque balance condition;

When the generator torque is less than or equal to a preset generator torque threshold corresponding to the rotational speed, it is judged that the output torque satisfies the preset torque balance condition.
The engine control method according to claim 2, wherein when the generator torque is less than or equal to a preset generator torque threshold corresponding to the rotational speed, judging that the output torque satisfies the preset Set torque balance conditions, including:

Within a preset time period, if the generator torque is continuously less than or equal to a preset generator torque threshold corresponding to the rotational speed, it is determined that the output torque satisfies the preset torque balance condition.
The engine control method according to claim 1, wherein the output torque also includes engine torque;

Before the judging whether the output torque satisfies a preset torque balance condition, the method further includes:

calculating the crankshaft end torque of the engine according to the generator torque, the engine torque and the speed ratio of the engine and the generator;

The judging whether the output torque satisfies the preset torque balance condition includes:

When the crankshaft end torque is greater than a preset crankshaft end torque threshold, it is judged that the output torque does not satisfy the preset torque balance condition;

If the crankshaft end torque is less than or equal to a preset crankshaft end torque threshold, it is determined that the output torque satisfies the preset torque balance condition.
The engine control method according to claim 1, wherein the output torque also includes engine torque;

Before the judging whether the output torque satisfies a preset torque balance condition, the method further includes:

obtaining the rotational speed of the engine;

And, calculating the crankshaft end torque of the engine according to the generator torque, the engine torque and the speed ratio of the engine and the generator;

The judging whether the output torque satisfies the preset torque balance condition includes:

When the generator torque is greater than a preset generator torque threshold corresponding to the rotational speed, and the crankshaft end torque is greater than a preset crankshaft end torque threshold, it is determined that the output torque does not satisfy the preset torque balance condition ;

When the generator torque is less than or equal to the preset generator torque threshold corresponding to the rotational speed, and the crankshaft end torque is less than or equal to the preset crankshaft end torque threshold, it is determined that the output torque satisfies the preset Torque balance condition.
The engine control method according to claim 4 or 5, characterized in that the crankshaft end of the engine is calculated based on the generator torque, the engine torque and the speed ratio of the engine and the generator. torque, including:

obtaining a product value of the generator torque and the speed ratio;

A sum value of the engine torque and the product value is determined as the crankshaft end torque.
The engine control method according to any one of claims 1 to 5, wherein the control instruction for restarting the engine is to modify the operating state of the engine to an abnormal state, so that the engine controller state to restart the engine.
An engine control device, characterized in that it comprises:

An acquisition module, configured to acquire the output torque of the target hybrid vehicle when the engine operating state of the target hybrid vehicle is in a normal state; wherein, the output torque includes at least generator torque;

A judging module, configured to judge whether the output torque satisfies a preset torque balance condition;

A control module, configured to output a control command to restart the engine if the output torque does not meet the preset torque balance condition.
The engine control device according to claim 8, wherein the acquiring module is further used for:

obtaining the rotational speed of the engine;

The judgment module is also used for:

When the generator torque is greater than a preset generator torque threshold corresponding to the rotational speed, it is judged that the output torque does not satisfy the preset torque balance condition;

If the generator torque is less than or equal to a preset generator torque threshold corresponding to the rotational speed, it is judged that the output torque satisfies the preset torque balance condition.
The engine control device according to claim 8, wherein the output torque also includes engine torque;

The device also includes a computing module for:

calculating the crankshaft end torque of the engine according to the generator torque, the engine torque and the speed ratio of the engine and the generator;

The judgment module is also used for:

When the crankshaft end torque is greater than a preset crankshaft end torque threshold, it is judged that the output torque does not satisfy the preset torque balance condition;

If the crankshaft end torque is less than or equal to a preset crankshaft end torque threshold, it is determined that the output torque satisfies the preset torque balance condition.
The engine control device according to claim 8, wherein the output torque also includes engine torque;

The acquisition module is also used for:

obtaining the rotational speed of the engine;

The device also includes a computing module for:

calculating the crankshaft end torque of the engine according to the generator torque, the engine torque and the speed ratio of the engine and the generator;

The judgment module is also used for:

When the generator torque is greater than a preset generator torque threshold corresponding to the rotational speed, and the crankshaft end torque is greater than a preset crankshaft end torque threshold, it is determined that the output torque does not satisfy the preset torque balance condition ;

When the generator torque is less than or equal to the preset generator torque threshold corresponding to the rotational speed, and the crankshaft end torque is less than or equal to the preset crankshaft end torque threshold, it is determined that the output torque satisfies the preset Torque balance condition.
The engine control device according to claim 10 or 11, wherein the calculation module is further used for:

obtaining a product value of the generator torque and the speed ratio;

A sum value of the engine torque and the product value is determined as the crankshaft end torque.
The engine control device according to any one of claims 8 to 11, wherein the control instruction for restarting the engine is to modify the operating state of the engine to an abnormal state, so that the engine controller state to restart the engine.
A vehicle controller, comprising a memory, a processor, and a computer program stored in the memory and operable on the processor, characterized in that, when the processor executes the computer program, the computer program according to the claims is realized. The steps of the engine control method described in any one of 1 to 7.
A vehicle, characterized in that the vehicle comprises the vehicle controller as claimed in claim 14.