A method for judging starting of an engine of a range-extending vehicle and related equipment

Abstract

The application relates to the technical field of power control of extended-range vehicles, and discloses an extended-range vehicle engine starting judgment method and related equipment, which comprises the following steps: acquiring a motor output torque and an engine output torque; comparing the motor output torque and the engine output torque according to a torque trend to obtain a comparison result; and judging the starting of the engine of the extended-range vehicle according to the comparison result. Through the comparison of the motor output torque and the engine output torque, the accuracy of the judgment of whether the engine is successfully started and runs is improved, the problem that the motor drags the engine to start all the time, the energy loss of the whole vehicle is large, and the efficiency is low is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power control of extended-range vehicles, in particular to an engine start judgment method for extended-range vehicles and related equipment. BACKGROUND

[0002] Extended-range hybrid vehicles (also known as series plug-in hybrid vehicles) are driven by electric motors, while internal combustion engines are mainly used to drive generators to generate electricity to power batteries, electric motors and other equipment on the vehicle. This design aims to improve the range of pure electric vehicles, avoid frequent charging, and better exploit the potential of pure electric vehicles. The engine start mechanism is different from that of traditional fuel vehicles or pure electric vehicles.

[0003] The existing extended-range power vehicle starts the generator by dragging the engine with the motor. When certain conditions are met, the EMS receives a request to start the engine, the motor drags the engine to start, the engine starts to inject and ignite, the speed rises, and the output torque. In actual situations, the engine injection and ignition are not stable, which can easily cause misfire, resulting in unstable drag between the motor and the engine, and the motor always dragging the engine to work, which affects the driving experience and the principle of optimal energy consumption. SUMMARY

[0004] The purpose of the present application is to provide an engine start judgment method for extended-range vehicles and related equipment to solve the technical problem that the current system cannot determine whether the engine has started and run successfully.

[0005] The present application is achieved by the following technical solutions:

[0006] In a first aspect, the present application provides an engine start judgment method for extended-range vehicles, comprising:

[0007] Obtaining the motor output torque and the engine output torque;

[0008] Comparing the motor output torque and the engine output torque according to the torque trend to obtain a comparison result;

[0009] Judging the engine start of the extended-range vehicle according to the comparison result.

[0010] Preferably, the motor output torque and the engine output torque are compared according to the torque trend to obtain a comparison result that the torque trend directions of the motor output torque and the engine output torque are consistent and the torque trend directions of the motor output torque and the engine output torque are opposite.

[0011] Further, when the torque trend directions of the motor output torque and the engine output torque are consistent, the engine start of the extended-range vehicle fails.

[0012] Further, when the torque trend directions of the motor output torque and the engine output torque are opposite, the sizes of the motor output torque and the engine output torque are judged, and a deviation value is calculated by the motor output torque and the engine output torque, a threshold value and a time threshold value are set, and the judgment of the engine start of the extended-range vehicle is made according to the deviation value, the set threshold value and time threshold value, and the sizes of the motor output torque and the engine output torque.

[0013] Further, the deviation value calculation formula of the motor output torque and the engine output torque is as follows:

[0014] Delta TQ = | TMF_actTorque - Eng_Torque |

[0015] Wherein, TMF_actTorque is the motor output torque; Eng_Torque is the engine output torque.

[0016] Further, the judgment of the engine start of the extended-range vehicle is made according to the deviation value, the set threshold value and time threshold value, and the sizes of the motor output torque and the engine output torque, and the specific process is as follows:

[0017] When the deviation value exceeds the set threshold value, and the cumulative time when the deviation value exceeds the threshold value, when the cumulative time exceeds the threshold time, and the motor output torque is less than zero, the engine output torque is greater than zero, the engine start of the extended-range vehicle is successful, otherwise the engine start of the extended-range vehicle fails.

[0018] In the second aspect, the present application provides an engine start judgment system of an extended-range vehicle, comprising:

[0019] A data acquisition module is used to acquire the motor output torque and the engine output torque.

[0020] A data comparison module is used to compare the motor output torque and the engine output torque according to the torque trend, and obtain a comparison result.

[0021] A judgment module is used to judge the engine start of the extended-range vehicle according to the comparison result.

[0022] In the third aspect, the present application provides a mobile terminal, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to realize the steps of the engine start judgment method of the extended-range vehicle as described above.

[0023] In a fourth aspect, the present application provides a computer readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the steps of the engine start-up judging method for extended-range vehicles as described above.

[0024] In a fifth aspect, the present application provides a computer program product comprising computer instructions, wherein the computer instructions instruct a computing device to perform operations corresponding to the engine start-up judging method for extended-range vehicles as described above.

[0025] Compared with the prior art, the present application has the following beneficial technical effects:

[0026] The present application provides an engine start-up judging method for extended-range vehicles, which obtains the motor output torque and the engine output torque, compares the motor output torque and the engine output torque according to the torque trend to obtain a comparison result, and judges the engine start-up of the extended-range vehicle according to the comparison result. By comparing the motor output torque and the engine output torque, the accuracy of judging whether the engine is successfully started is improved, and the problem of high energy loss and low efficiency due to the motor always dragging the engine to start is avoided.

[0027] Further, by the characteristics and time points of the motor and engine torque output, when the torque trend directions of the motor output torque and the engine output torque are consistent, the torque output of the motor is insufficient to overcome the starting resistance of the engine, and the engine cannot be started, so it is judged as a failure to start. When the torque trend directions of the motor output torque and the engine output torque are reverse, the reverse torque of the motor is used to overcome the resistance of the engine during starting or to help adjust the internal state of the engine (such as valve position, crankshaft position, etc.), so that the engine is easier to start, and it is judged that the engine is successfully started.

[0028] Further, the torque output is a direct reflection of the working state of the engine and the motor. By monitoring the change of the torque output, it can be directly understood whether the engine has started to work. Compared with other indirect judgment methods (such as sound, vibration, etc.), the torque output data is more accurate and stable, which can reduce the misjudgment caused by external interference or subjective judgment. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 The figure is a flow chart of the engine start-up judging method for extended-range vehicles in the embodiment of the present application.

[0030] Figure 2 The figure is a structure diagram of the engine start-up judging system for extended-range vehicles in the embodiment of the present application.

[0031] Figure 3 The figure is a trend diagram of the motor output torque and the engine output torque in the embodiment of the present application.

[0032] In the figure: 1-data acquisition module; 2-data comparison module; 3-judgment module. DETAILED DESCRIPTION

[0033] In order to make the personnel in the technical field better understand the application scheme, the technical solutions in the embodiments of the application will be clearly and completely described below in combination with the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor should belong to the protection scope of the application.

[0034] The application will be further described in detail below in combination with the drawings:

[0035] The purpose of the application is to provide a range extending vehicle engine starting judgment method and related equipment to solve the technical problem that the current system cannot judge whether the engine is successfully started and running.

[0036] Embodiment 1

[0037] Referring to Figure 1 , in one embodiment of the application, a range extending vehicle engine starting judgment method is provided, comprising:

[0038] Step 1, acquiring motor output torque and engine output torque;

[0039] Step 2, comparing the motor output torque and the engine output torque according to the torque trend to obtain a comparison result;

[0040] Specifically, the motor output torque and the engine output torque are compared according to the torque trend to obtain a comparison result that the torque trend directions of the motor output torque and the engine output torque are consistent and the torque trend directions of the motor output torque and the engine output torque are opposite.

[0041] Step 3, judging the starting of the range extending vehicle engine according to Figure 3 as shown, according to the comparison result.

[0042] Specifically, when the torque trend directions of the motor output torque and the engine output torque are consistent, the starting of the range extending vehicle engine fails.

[0043] Specifically, when the torque trend directions of the motor output torque and the engine output torque are opposite, the magnitudes of the motor output torque and the engine output torque are determined, a deviation value is calculated based on the motor output torque and the engine output torque, a threshold value and a time threshold value are set, and the judgment of the engine start of the extended-range vehicle is made according to the deviation value, the set threshold value and time threshold value, and the magnitudes of the motor output torque and the engine output torque.

[0044] The deviation value calculation formula of the motor output torque and the engine output torque is as follows:

[0045] ΔTQ = |TMF_actTorque - Eng_Torque|

[0046] TMF_actTorque is the motor output torque; and Eng_Torque is the engine output torque.

[0047] The judgment of the engine start of the extended-range vehicle according to the deviation value, the set threshold value and time threshold value, and the magnitudes of the motor output torque and the engine output torque is specifically as follows:

[0048] When the deviation value exceeds the set threshold value, and the cumulative time when the deviation value exceeds the threshold value is accumulated, when the cumulative time exceeds the threshold time, and the motor output torque is less than zero and the engine output torque is greater than zero, the engine start of the extended-range vehicle is successful, otherwise the engine start of the extended-range vehicle fails.

[0049] When the motor output torque is less than zero, it indicates that the motor may be in a braking or reverse state, but not driving the vehicle forward; and when the engine output torque is greater than zero, it indicates that the engine is generating a positive torque, i.e. working.

[0050] In the embodiment, if all the above conditions are met, the system determines that the engine start of the extended-range vehicle is successful, otherwise if the conditions are not met at any step (such as the deviation value does not exceed the threshold value, the cumulative time does not exceed the threshold time, and the motor or engine torque does not meet the requirements), the system determines that the engine start of the extended-range vehicle fails.

[0051] In the embodiment, the engine start success is determined by comprehensively considering multiple parameters (deviation value, cumulative time, and torque output), which can greatly improve the accuracy and reliability of the determination. Compared with the single parameter determination method, this multi-parameter comprehensive determination method can more comprehensively reflect the actual working state of the engine, reduce the false positives or false negatives caused by single parameter abnormalities. Accurate determination of the engine start state helps the vehicle control system to take appropriate measures (such as adjusting the motor output, increasing fuel supply, etc.) in time, so as to optimize the power performance and fuel economy of the vehicle, and improve the driving safety.

[0052] In this embodiment, when it is determined that the engine has failed to start successfully in the current cycle, the number of allowed starts can be set. If the number of starts exceeds a certain value, the engine is prohibited from starting in the current cycle, and the method of this embodiment is used for judgment.

[0053] In summary, the embodiment provides a method for judging the start of an extended-range vehicle engine. The method obtains the motor output torque and the engine output torque, compares the motor output torque and the engine output torque according to the torque trend, and obtains a comparison result. The method judges the start of the extended-range vehicle engine according to the comparison result. By comparing the motor output torque and the engine output torque, the accuracy of judging whether the engine starts successfully is improved, and the problem of high energy loss and low efficiency due to the motor continuously driving the engine to start is avoided.

[0054] In this embodiment, the vehicle control system can immediately take measures to intervene, such as increasing the motor torque output to assist in starting, adjusting the fuel supply, etc., to ensure that the vehicle can start smoothly and continue to run. In the case of unsuccessful engine start, if the vehicle continues to rely on the motor to drive, it will consume a large amount of electrical energy. By timely judging and starting the engine, the dependence on electrical energy can be reduced, and the invalid energy consumption can be reduced. When the engine and the motor work together, they can provide more powerful power output. By reasonably controlling the torque output ratio of the two, the power performance of the vehicle can be optimized, and the acceleration performance and climbing ability can be improved. The method of judging whether the engine starts by the motor and engine torque output has the beneficial effects of improving the accuracy of judgment, achieving rapid response, optimizing vehicle performance and fuel economy, and enhancing driving experience and safety. This technology has been widely applied in the field of modern automobiles, and will continue to be improved and developed with the advancement of technology.

[0055] In this embodiment, by the characteristics and time points of the motor and engine torque output, when the torque trend directions of the motor output torque and the engine output torque are consistent, the torque output of the motor is not enough to overcome the starting resistance of the engine, and the engine cannot be started, so it is judged as a failure. When the torque trend directions of the motor output torque and the engine output torque are opposite, the reverse torque of the motor is used to overcome the resistance of the engine during starting or to help adjust the internal state of the engine (such as valve position, crankshaft position, etc.), so that it is easier to start, and the engine start is judged as successful.

[0056] In this embodiment, in the extended-range vehicle, the actual output torque trend and deviation of the motor and the engine are used to judge whether the engine starts successfully, which is a dynamic and accurate method. This method not only considers the absolute value of the torque, but also considers the change trend of the torque, so that the cooperative working state of the engine and the motor can be more accurately reflected.

[0057] If the output torque trends of the motor and the engine are consistent (i.e. increase simultaneously or decrease simultaneously), it can mean that the two do not form an effective synergy, especially during the process of engine starting. Therefore, in this case, it can be preliminarily judged that the engine starting fails or is not successfully connected to the drive system. When the output torque trends of the motor and the engine are opposite, and there is a significant torque deviation between the two, it indicates that the engine can have started to generate positive torque (drive the vehicle to move forward), while the motor can be in a braking or auxiliary deceleration state (generate negative torque). The existence of such opposite trends and torque deviation is strong evidence that the engine is successfully started and connected to the drive system. The reversal of torque trends and the deviation need to last for a certain period of time to be considered effective. This is to prevent false positives due to transient fluctuations or measurement errors. Therefore, the system needs to set a reasonable duration threshold, and only when the opposite trend and torque deviation last beyond this threshold, it is considered that the engine starting is successful.

[0058] Embodiment 2

[0059] According to Figure 2 The embodiment shown provides an engine starting judgment system for extended-range vehicles, which comprises a data acquisition module 1, a data comparison module 2, and a judgment module 3;

[0060] The data acquisition module 1 is used to acquire the output torque of the motor and the output torque of the engine.

[0061] The data comparison module 2 is used to compare the output torque of the motor and the output torque of the engine according to torque trends to obtain a comparison result.

[0062] The judgment module 3 is used to judge the engine starting of the extended-range vehicle according to the comparison result.

[0063] Embodiment 3

[0064] The application also provides a mobile terminal comprising a memory, a processor, and a computer program, such as an engine starting judgment program for extended-range vehicles, stored in the memory and executable on the processor.

[0065] The processor implements the steps of the engine starting judgment method for extended-range vehicles when executing the computer program, for example:

[0066] Acquire the output torque of the motor and the output torque of the engine.

[0067] Compare the output torque of the motor and the output torque of the engine according to torque trends to obtain a comparison result.

[0068] Judge the engine starting of the extended-range vehicle according to the comparison result.

[0069] Alternatively, the processor implements the functions of the modules in the above system when executing the computer program, for example:

[0070] The data acquisition module 1 is configured to acquire the motor output torque and the engine output torque.

[0071] The data comparison module 2 is configured to compare the motor output torque and the engine output torque according to the torque trend to obtain a comparison result.

[0072] The judgment module 3 is configured to judge the engine start of the extended-range vehicle according to the comparison result.

[0073] For example, the computer program can be divided into one or more modules / units, which are stored in the memory and executed by the processor to complete the present application. The one or more modules / units can be a series of computer program instruction segments capable of completing a specific function, which are used to describe the execution process of the computer program in the mobile terminal.

[0074] For example, the computer program can be divided into a data acquisition module 1, a data comparison module 2, and a judgment module 3.

[0075] The specific functions of each module are as follows:

[0076] The data acquisition module 1 is configured to acquire the motor output torque and the engine output torque.

[0077] The data comparison module 2 is configured to compare the motor output torque and the engine output torque according to the torque trend to obtain a comparison result.

[0078] The judgment module 3 is configured to judge the engine start of the extended-range vehicle according to the comparison result.

[0079] The mobile terminal can be a desktop computer, a notebook, a palm computer, and a cloud server, etc. The mobile terminal can include, but is not limited to, a processor and a memory.

[0080] The processor can be a central processing unit (CPU), and can also be other general-purpose processors, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor. The processor is a control center of the mobile terminal, which can connect all parts of the mobile terminal through various interfaces and lines.

[0081] The memory can be used to store the computer programs and / or modules, and the processor can realize various functions of the mobile terminal by running or executing the computer programs and / or modules stored in the memory, and calling data stored in the memory.

[0082] The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application program required by a function (such as a sound playing function, an image playing function, etc.), etc.; and the data storage area can store data created according to the use of the mobile terminal (such as audio data, a phone book, etc.), etc. In addition, the memory can include a high-speed random access memory, and can also include a nonvolatile memory, for example, a hard disk, a memory, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, at least one disk storage device, a flash memory device, or other volatile solid-state memory device.

[0083] Embodiment 4

[0084] The application further provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to realize the steps of the engine starting judgment method for extended-range vehicle.

[0085] If the modules / units of the mobile terminal are realized in the form of software function units and sold or used as independent products, the modules / units can be stored in a computer readable storage medium.

[0086] Based on such understanding, the present application implements all or part of the processes in the above method, and can also be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer readable storage medium, and when the computer program is executed by a processor, the steps of the above-mentioned aggregated reinforcement learning resource scheduling method can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or some intermediate forms, etc.

[0087] The computer readable medium can include any entity or device, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc. that can carry the computer program code.

[0088] It should be noted that the content contained in the computer readable medium can 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, the computer readable medium does not include electrical carrier signals and telecommunication signals.

[0089] Embodiment 5

[0090] A computer program product includes computer instructions instructing a computing device to perform operations corresponding to the above-mentioned extended-range vehicle engine start judgment method.

[0091] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application rather than limit them, and although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application, and any modification or equivalent replacement without departing from the spirit and scope of the present application should be covered in the protection scope of the claims of the present application.

Claims

1. A method of judging the start of an engine of a range extender vehicle, characterized by, The method comprises the following steps: acquiring motor output torque and engine output torque; comparing the motor output torque and the engine output torque according to torque trend to obtain a comparison result; judging engine starting of the extended-range vehicle according to the comparison result; the comparison result of comparing the motor output torque and the engine output torque according to torque trend is that the torque trend directions of the motor output torque and the engine output torque are consistent and the torque trend directions of the motor output torque and the engine output torque are opposite; when the torque trend directions of the motor output torque and the engine output torque are opposite, judging the size of the motor output torque and the engine output torque, calculating a deviation value through the motor output torque and the engine output torque, setting a threshold value and a time threshold value, and judging engine starting of the extended-range vehicle according to the deviation value, the set threshold value and time threshold value, and the size of the motor output torque and the engine output torque; the judging engine starting of the extended-range vehicle according to the deviation value, the set threshold value and time threshold value, and the size of the motor output torque and the engine output torque is specifically as follows: when the deviation value exceeds the set threshold value, and the cumulative time when the deviation value exceeds the threshold value is accumulated, when the cumulative time exceeds the threshold time, and the motor output torque is less than zero and the engine output torque is greater than zero, the engine starting of the extended-range vehicle is successful, otherwise the engine starting of the extended-range vehicle fails.

2. The method according to claim 1, wherein when the torque trend directions of the motor output torque and the engine output torque are consistent, the engine starting of the extended-range vehicle fails.

3. The method according to claim 1, wherein The deviation value calculation formula of the motor output torque and the engine output torque is as follows: ΔTQ = | TMF_actTorque - Eng_Torque | wherein, TMF_actTorque is the motor output torque; Eng_Torque is the engine output torque.

4. A range extender engine start determination system characterized by comprising: The method comprises the following steps: a data acquisition module (1) for acquiring motor output torque and engine output torque; a data comparison module (2) for comparing the motor output torque and the engine output torque according to torque trend to obtain a comparison result; a judging module (3) for judging engine starting of the extended-range vehicle according to the comparison result.

5. A mobile terminal comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The processor executes the computer program to realize the steps of the extended-range vehicle engine starting judgment method according to any one of claims 1-3.

6. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 5. The computer program is executed by the processor to realize the steps of the extended-range vehicle engine starting judgment method according to any one of claims 1-3.

7. A computer program product comprising computer instructions, characterized in that, The computer instructions instruct the computing device to perform the operations corresponding to the extended-range vehicle engine starting judgment method according to any one of claims 1-3.

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