Range-extending vehicle type engine starting judgment method and related equipment

Abstract

The invention relates to the technical field of extended-range vehicle model power control, and discloses an extended-range vehicle model engine starting judgment method and related equipment, and the method comprises the steps: obtaining a motor output torque and an engine output torque; the motor output torque and the engine output torque are compared according to the torque trend, and a comparison result is obtained; and judging the starting of the extended-range vehicle type engine according to the comparison result. By comparing the output torque of the motor with the output torque of the engine, the accuracy of judging whether the engine is successfully started or not is improved, and the problems that the motor always drags the engine to be started, the energy consumption loss of the whole vehicle is large, and the efficiency is low are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of power control for range-extended vehicles, and in particular to a method for judging engine start of a range-extended vehicle and related equipment. Background Art

[0002] Extended-range hybrid vehicles (also known as series plug-in hybrid vehicles) use electric motors to drive the vehicle, while the internal combustion engine is mainly used to drive the generator to generate electricity to power the battery, electric motor and other devices on the vehicle. This design is intended to increase the range of pure electric vehicles, avoid frequent charging, and better realize the potential of pure electric vehicles. Its engine starting mechanism is different from that of traditional fuel vehicles or pure electric vehicles.

[0003] In existing extended-range power models, the range extender starts generating electricity by driving the engine with the motor. When certain conditions are met and the EMS receives a request to start the engine, the motor drives the engine to start, the engine begins to spray fuel and ignite, the speed increases, and the torque is output. In actual situations, the engine's fuel injection and ignition are unstable, which can easily lead to misfires, unstable drag relationship between the motor and the engine, and the motor will always drag the engine to work, which will affect the overall driving experience and the principle of optimal energy consumption. Summary of the invention

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

[0005] The present invention is achieved through the following technical solutions:

[0006] In a first aspect, the present invention provides a method for determining engine start of a range-extended vehicle, comprising:

[0007] Obtaining motor output torque and 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] The engine start of the extended-range vehicle model is determined based on the comparison result.

[0010] Preferably, the motor output torque and the engine output torque are compared according to the torque trend, and the comparison result 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.

[0011] Furthermore, when the torque trends of the motor output torque and the engine output torque are in the same direction, the engine start of the extended-range vehicle fails.

[0012] Furthermore, when the torque trend directions of the motor output torque and the engine output torque are opposite, the magnitude 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 engine start-up of the vehicle model is judged based on the deviation value and the set threshold value and time threshold value and the magnitude of the motor output torque and the engine output torque.

[0013] Furthermore, the calculation formula for the deviation between the motor output torque and the engine output torque is as follows:

[0014] ΔTQ=|TMF_actTorque-Eng_Torque|

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

[0016] Furthermore, the engine start of the vehicle model is judged based on the deviation value, the set threshold value and the time threshold value, and the magnitude of the motor output torque and the engine output torque. The specific process is as follows:

[0017] When the deviation value exceeds the set threshold, and the accumulated time starts from the time the deviation value exceeds the threshold, when the accumulated 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 of the extended-range vehicle model starts successfully, otherwise the engine of the extended-range vehicle model fails to start.

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

[0019] A data acquisition module, used for acquiring motor output torque and engine output torque;

[0020] A data comparison module, used for comparing the motor output torque and the engine output torque according to the torque trend to obtain a comparison result;

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

[0022] In a third aspect, the present invention provides a mobile terminal comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method for determining engine start of an extended-range vehicle type as described above when executing the computer program.

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

[0024] In a fifth aspect, the present invention provides a computer program product, comprising computer instructions, characterized in that the computer instructions instruct a computing device to execute operations corresponding to the method for determining engine start of an extended-range vehicle type as described above.

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

[0026] The present invention provides a method for judging the start of an engine of a range-extended vehicle. The method comprises the following steps: obtaining the motor output torque and the 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 start of the engine of the range-extended vehicle according to the comparison result. By comparing the motor output torque and the engine output torque, the accuracy of judging whether the engine has been started and run successfully is improved, thereby avoiding the problem that the motor always drags the engine to start, resulting in large energy consumption loss and low efficiency of the whole vehicle.

[0027] Furthermore, through the characteristics and time points of the torque output of the motor and the engine, 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 start 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 at engine start-up or to help adjust the internal state of the engine (such as valve position, crankshaft position, etc.), so that it is easier to start, so it is judged that the engine start is successful.

[0028] Furthermore, torque output is a direct reflection of the working status of the engine and motor. By monitoring the changes in torque output, you can intuitively understand whether the engine has started working. Compared with other indirect judgment methods (such as sound, vibration, etc.), torque output data is more accurate and stable, and can reduce misjudgments caused by external interference or subjective judgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a flow chart of the engine start judgment method for the extended-range vehicle model in an embodiment of the present invention;

[0030] Figure 2 This is a structural diagram of the engine start judgment system of the extended-range vehicle in an embodiment of the present invention;

[0031] Figure 3 It is a schematic diagram of the trend of the motor output torque and the engine output torque in an embodiment of the present invention;

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

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0035] The purpose of the present invention is to provide a method for determining engine start of an extended-range vehicle and related equipment to solve the technical problem that the current system cannot determine whether the engine has been started and run successfully.

[0036] Example 1

[0037] See also Figure 1 In one embodiment of the present invention, a method for determining engine start of a range-extended vehicle is provided, comprising:

[0038] Step 1, obtaining the motor output torque and the 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, and the comparison result 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.

[0041] Step 3, according to Figure 3 As shown, the engine start of the extended-range vehicle model is determined based on the comparison result.

[0042] Specifically, when the torque trends of the motor output torque and the engine output torque are in the same direction, the engine start of the extended-range vehicle fails.

[0043] Specifically, when the torque trend directions of the motor output torque and the engine output torque are opposite, the magnitude 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, and a threshold value and a time threshold value are set. The engine start of the vehicle model is judged based on the deviation value and the set threshold value and time threshold value and the magnitude of the motor output torque and the engine output torque.

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

[0045] ΔTQ=|TMF_actTorque-Eng_Torque|

[0046] Among them, TMF_actTorque is the motor output torque; Eng_Torque is the engine output torque.

[0047] The engine start of the vehicle model is judged based on the deviation value, the set threshold value, the time threshold value, and the magnitude of the motor output torque and the engine output torque. The specific process is as follows:

[0048] When the deviation value exceeds the set threshold, and the accumulated time starts from the time the deviation value exceeds the threshold, when the accumulated 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 of the extended-range vehicle model starts successfully, otherwise the engine of the extended-range vehicle model fails to start.

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

[0050] In this embodiment, if all the above conditions are met, the system determines that the engine of the extended-range vehicle model is started successfully. Otherwise, if the conditions are not met in any step (such as the deviation value does not exceed the threshold, the accumulated time does not exceed the threshold time, the motor or engine torque does not meet the requirements), the system determines that the engine of the extended-range vehicle model fails to start.

[0051] In this embodiment, by comprehensively considering multiple parameters (deviation value, cumulative time, torque output) to determine whether the engine is started successfully, the accuracy and reliability of the judgment can be greatly improved. Compared with the judgment method of a single parameter, this multi-parameter comprehensive judgment method can more comprehensively reflect the actual working state of the engine and reduce misjudgments or missed judgments caused by abnormalities in a single parameter. Accurately judging the engine start-up state helps the vehicle control system to take corresponding measures in a timely manner (such as adjusting motor output, increasing fuel supply, etc.) to optimize the vehicle's power performance and fuel economy, and improve driving safety.

[0052] In this embodiment, when it is determined that the engine cannot be started successfully in the current cycle, the number of times the engine is allowed to start can be set. When the number of starts exceeds a certain value, starting the engine in this cycle is prohibited, and the judgment is made through the method of this embodiment.

[0053] In summary, the present embodiment provides a method for judging the start of an engine of a range-extended vehicle, the method comprising obtaining the motor output torque and the engine output torque; comparing the motor output torque and the engine output torque according to a torque trend to obtain a comparison result; judging the start of the engine of the range-extended vehicle according to the comparison result, and by comparing the motor output torque and the engine output torque, improving the accuracy of judging whether the engine has been started and run successfully, thereby avoiding the problem that the motor has been dragging the engine to start, resulting in large energy loss and low efficiency of the whole vehicle.

[0054] In this embodiment, the vehicle control system can immediately take measures to intervene by judging that the engine has not started successfully through the torque output, such as increasing the motor torque output to assist in starting, adjusting the fuel supply, etc., so as to ensure that the vehicle can start smoothly and continue to drive. If the vehicle continues to rely on the motor to drive when the engine has not started successfully, a large amount of electrical energy will be consumed. By timely judging and starting the engine, the dependence on electrical energy can be reduced and ineffective energy consumption can be reduced. When the engine and the motor work together, they can provide a 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. Judging whether the engine is started by the motor and engine torque output has the beneficial effects of improving the judgment accuracy, achieving rapid response, optimizing vehicle performance and fuel economy, and enhancing driving experience and safety. This technology has been widely used in the field of modern automobiles and has been continuously improved and developed with the continuous advancement of technology.

[0055] In this embodiment, through the characteristics and time points of the torque output of the motor and the engine, 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. Therefore, it is judged that the start has failed. 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 at engine start-up or to help adjust the internal state of the engine (such as valve position, crankshaft position, etc.), so that it is easier to start. Therefore, it is judged that the engine has started successfully.

[0056] In this embodiment, in the extended-range vehicle model, using the actual output torque trend and deviation of the motor and the engine to determine whether the engine start is successful 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 as to more accurately reflect the coordinated working state of the engine and the motor.

[0057] If the output torque trends of the motor and the engine are consistent (i.e., they increase or decrease at the same time), this may mean that the two do not form an effective synergy, especially during the engine start-up process. Therefore, in this case, it can be preliminarily judged that the engine has failed to start or has not been 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, this indicates that the engine may have begun to generate positive torque (driving the vehicle forward), while the motor may be in a braking or auxiliary deceleration state (generating negative torque). The continued existence of this reverse trend and torque deviation is strong evidence that the engine has been successfully started and incorporated into the drive system. The reversal and deviation of the torque trend need to last for a certain period of time to be considered valid. This is to prevent misjudgment due to transient fluctuations or measurement errors. Therefore, the system needs to set a reasonable duration threshold, and the engine start is considered successful only when the reverse trend and torque deviation continue to exceed this threshold.

[0058] Example 2

[0059] according to Figure 2 As shown, this embodiment provides an engine start judgment system for an extended-range vehicle, including a data acquisition module 1, a data comparison module 2 and a judgment module 3;

[0060] Data acquisition module 1, used to acquire motor output torque and engine output torque;

[0061] A data comparison module 2 is used to compare the motor output torque and the engine output torque according to the torque trend to obtain a comparison result;

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

[0063] Example 3

[0064] The present invention also provides a mobile terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor, such as an engine start determination program for an extended-range vehicle.

[0065] When the processor executes the computer program, the steps of the above-mentioned method for determining the start of the engine of the extended-range vehicle are implemented, for example:

[0066] Obtaining motor output torque and engine output torque;

[0067] Comparing the motor output torque and the engine output torque according to the torque trend to obtain a comparison result;

[0068] The engine start of the extended-range vehicle model is determined based on the comparison result.

[0069] Alternatively, when the processor executes the computer program, the functions of each module in the above system are realized, for example:

[0070] Data acquisition module 1, used to acquire motor output torque and engine output torque;

[0071] A data comparison module 2 is used 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 used to judge whether to start the engine of the extended-range vehicle according to the comparison result.

[0073] Exemplarily, the computer program may be divided into one or more modules / units, which are stored in the memory and executed by the processor to implement the present invention. The one or more modules / units may be a series of computer program instruction segments capable of implementing specific functions, which are used to describe the execution process of the computer program in the mobile terminal.

[0074] For example, the computer program may be divided into a data acquisition module 1, a data comparison module 2, and a determination module 3;

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

[0076] Data acquisition module 1, used to acquire motor output torque and engine output torque;

[0077] A data comparison module 2 is used 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 used to judge whether to start the engine of the extended-range vehicle according to the comparison result.

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

[0080] The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (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 any conventional processor, etc. The processor is the control center of the mobile terminal, and uses various interfaces and lines to connect various parts of the entire mobile terminal.

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

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

[0083] Example 4

[0084] The present invention also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for determining the start of an engine of an extended-range vehicle are implemented.

[0085] If the module / unit integrated in the mobile terminal is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.

[0086] Based on this understanding, the present invention implements all or part of the processes in the above method, and can also be completed by instructing related hardware through a computer program, and 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 aggregate reinforcement learning resource scheduling method can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form, etc.

[0087] The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, 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.

[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, computer-readable media does not include electrical carrier signals and telecommunication signals.

[0089] Example 5

[0090] A computer program product includes computer instructions, wherein the computer instructions instruct a computing device to execute operations corresponding to the above-mentioned method for determining engine start of an extended-range vehicle.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for determining engine start of an extended-range vehicle, characterized in that: include: Obtaining motor output torque and engine output torque; Comparing the motor output torque and the engine output torque according to the torque trend to obtain a comparison result; The engine start of the extended-range vehicle model is determined based on the comparison result.

2. The method for determining engine start of an extended-range vehicle according to claim 1, characterized in that: The motor output torque and the engine output torque are compared according to the torque trends, and the comparison results are that the torque trends of the motor output torque and the engine output torque are in the same direction and the torque trends of the motor output torque and the engine output torque are in opposite directions.

3. The method for determining engine start of an extended-range vehicle according to claim 2, characterized in that: 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.

4. The method for determining engine start of an extended-range vehicle according to claim 2, characterized in that: When the torque trend directions of the motor output torque and the engine output torque are opposite, the magnitude 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, and a threshold value and a time threshold value are set. The engine start of the vehicle model is judged based on the deviation value and the set threshold value and time threshold value and the magnitude of the motor output torque and the engine output torque.

5. The method for determining engine start of a range-extended vehicle according to claim 4, characterized in that: The calculation formula of the deviation between the motor output torque and the engine output torque is as follows: ΔTQ=|TMF_actTorque-Eng_Torque| Among them, TMF_actTorque is the motor output torque; Eng_Torque is the engine output torque.

6. The method for determining engine start of a range-extended vehicle according to claim 4, characterized in that: The engine start of the vehicle model is judged based on the deviation value, the set threshold value, the time threshold value, the motor output torque and the engine output torque. The specific process is as follows: When the deviation value exceeds the set threshold, and the accumulated time starts from the time the deviation value exceeds the threshold, when the accumulated 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 of the extended-range vehicle model starts successfully, otherwise the engine of the extended-range vehicle model fails to start.

7. An engine start judgment system for a range-extended vehicle, characterized in that: include: A data acquisition module (1), used for acquiring the motor output torque and the engine output torque; A data comparison module (2) is used to compare the motor output torque and the engine output torque according to the torque trend to obtain a comparison result; The judgment module (3) is used to judge whether to start the engine of the range-extended vehicle type according to the comparison result.

8. A mobile terminal comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method for determining engine start of an extended-range vehicle type as claimed in any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method for determining engine start of an extended-range vehicle type as claimed in any one of claims 1 to 6 are implemented.

10. A computer program product comprising computer instructions, characterized in that: The computer instructions instruct the computing device to execute operations corresponding to the method for determining engine start of an extended-range vehicle as described in any one of claims 1-6.

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