Torque control method and device, vehicle, equipment, storage medium and program product

Abstract

The invention relates to a torque control method and device, a vehicle, equipment, a storage medium and a program product, and relates to the technical field of automobiles. The method comprises the steps that the output torque, the rotating speed and the rotating speed change rate of an engine of a vehicle at the current time are obtained; when the rotating speed change rate is larger than a first threshold value and the output torque of the engine at the current time is larger than or equal to a second threshold value, the first demand torque of an engine control unit ECU is determined, and under the condition that the first demand torque is larger than a third threshold value, the first demand torque is corrected based on the rotating speed and the rotating speed change rate, and the second demand torque is obtained; controlling the output torque of the engine at the first time based on the second demand torque; the first time is after the current time. Therefore, the galloping fault can be pre-judged and avoided in advance, and the influence caused by the torque precision of the engine and the motor is eliminated.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, in particular to the field of engine control technology, and specifically to a torque control method, device, vehicle, equipment, storage medium and program product. Background Art

[0002] The engine of a hybrid vehicle with a series configuration can work independently of the operating conditions of the entire vehicle and output energy by driving the generator. Since there is a certain deviation in the torque accuracy of the engine and the generator, when the actual torque of the engine at the maximum power point is higher than the preset target torque and exceeds the torque limit of the generator, the engine speed will quickly overshoot, which may cause a runaway failure in extreme cases. If the speed overshoot cannot be effectively suppressed in a timely manner, it may cause damage or failure of transmission components such as connecting rods and torque dampers.

[0003] Related technology CN110056436A proposes to compare the maximum allowable torque of the generator, the original target torque of the engine and the closed-loop speed torque during the speed regulation process, and take the minimum value of the three as the upper limit of the engine target torque to prevent runaway.

[0004] Related technology CN117485319A proposes to reduce the engine target torque value and increase the engine target speed by reducing the engine maximum torque and reconfiguring the engine target torque and generator target speed to ensure that the actual engine torque can meet the requirements of the redistributed engine target torque.

[0005] However, the methods in the related art cannot accurately eliminate the influence of the torque accuracy of the engine and the motor. Summary of the invention

[0006] The present application provides a torque control method, device, vehicle, equipment, storage medium and program product to at least solve the technical problem in the related art that it is difficult to accurately eliminate the influence of the torque accuracy of the engine and the motor. The technical solution of the present application is as follows:

[0007] According to the first aspect provided by the present application, a torque correction method is provided, including: obtaining the output torque, speed and speed change rate of the engine of the vehicle at the current time; when the speed change rate is greater than a first threshold and the output torque of the engine at the current time is greater than or equal to a second threshold, determining the first required torque output by the engine control unit ECU, and when the first required torque is greater than a third threshold, based on the speed and the speed change rate, correcting the first required torque to obtain a second required torque; based on the second required torque, controlling the output torque of the engine at the first time; the first time is after the current time.

[0008] According to the above-mentioned technical means, the present application can monitor the output torque, speed and speed change rate of the engine in real time. When it is identified that the speed change rate increases abnormally and the engine torque is large, it can dynamically adjust the required torque output by the engine control unit ECU, thereby effectively preventing the runaway phenomenon and avoiding speed overshoot. Therefore, the present application can accurately eliminate the influence of the engine and motor torque accuracy.

[0009] In one possible manner, based on the rotational speed and the rotational speed change rate, the first required torque is corrected to obtain the second required torque, including: determining a first correction parameter based on the rotational speed and the rotational speed change rate; based on the first correction parameter, correcting the first required torque to obtain the second required torque.

[0010] According to the above-mentioned technical means, the present application can accurately understand the operating status of the engine by real-time monitoring of the speed and the speed change rate. Therefore, correcting the first required torque according to these dynamic data helps to ensure that the engine can operate stably under various working conditions, prevent runaway phenomenon, and avoid speed overshoot problems.

[0011] In one possible method, a correction parameter is determined based on the rotational speed and the rotational speed change rate, including: determining a first parameter and a first correction coefficient corresponding to the rotational speed; determining the sum of the first parameter and the second parameter as the first correction parameter; and the second parameter is the product of the rotational speed change rate and the first correction coefficient.

[0012] According to the above technical means, the present application can combine the two factors of speed and speed change rate to determine the correction parameter, making the control more precise. The speed reflects the current operating state of the engine, while the speed change rate provides predictive information about the future state change of the engine. Combining these two factors can more accurately determine the needs of the engine and adjust the output torque accordingly.

[0013] In one possible manner, the first required torque of the engine control unit ECU is determined, and the method further includes: when the initial required torque of the ECU is greater than a third threshold, based on preset parameters, correcting the initial required torque to obtain the first required torque.

[0014] According to the above technical means, the present application can correct the initial required torque based on preset parameters to achieve precise control of the torque output. By adjusting these parameters, it is possible to effectively limit the peak torque without sacrificing engine performance, thereby reducing the risk of runaway.

[0015] In one possible embodiment, the vehicle includes a computing unit; the method also includes: determining the torque change rate of the engine when the speed change rate is less than or equal to a first threshold and / or the output torque of the engine at the current time is less than a second threshold and / or the required torque of the ECU is less than or equal to a third threshold; obtaining the required torque of the vehicle's power control unit PCU and the calculated torque of the computing unit when the absolute value of the speed change rate is less than a fourth threshold and the absolute value of the engine's torque change rate is less than a fifth threshold; based on the speed, the required torque of the PCU, the calculated torque, the output torque of the engine at the current time, and the required torque of the ECU, correcting the required torque of the ECU to obtain the third required torque.

[0016] According to the above-mentioned technical means, the present application can more comprehensively understand the operating status of the engine and the power requirements of the vehicle by real-time monitoring of the engine speed change rate, output torque and required torque of the ECU and PCU, and correct the ECU required torque based on these real-time data, thereby ensuring that the engine can operate in a more precise and stable manner under various operating conditions, thereby reducing the risk of abnormal phenomena such as runaway.

[0017] In one possible method, based on the speed, the required torque of the PCU, the calculated torque, the output torque of the engine at the current time, and the required torque of the ECU, the required torque of the ECU is corrected to obtain a third required torque, including: when the absolute value of the difference between the required torque of the PCU and the output torque of the engine at the current time is less than a sixth threshold, and the absolute value of the difference between the calculated torque and the required torque of the ECU is less than a seventh threshold, and based on the speed, the required torque of the ECU is corrected to obtain the third required torque.

[0018] According to the above-mentioned technical means, the present application can correct the ECU required torque based on the speed when the PCU required torque is not much different from the actual output torque of the engine (i.e. the difference is less than the sixth threshold), and the calculated torque is also close to the ECU required torque (i.e. the difference is less than the seventh threshold), thereby further enhancing the coordination and consistency of various parts of the vehicle power system and ensuring the stable operation of the entire power system.

[0019] In one possible manner, based on the rotational speed, the required torque of the ECU is corrected to obtain a third required torque, including: determining a second correction parameter based on the rotational speed; and correcting the required torque of the ECU based on the second correction parameter to obtain the third required torque.

[0020] According to the above-mentioned technical means, the present application introduces the rotational speed as a correction parameter, which can more accurately adjust the required torque according to the current operating state of the engine, so that the engine can operate stably under various operating conditions.

[0021] According to the second aspect provided by the present application, a torque correction device is provided, including: an acquisition unit, a determination unit and a control unit; the acquisition unit is used to acquire the output torque, speed and speed change rate of the engine of the vehicle at the current time; the determination unit is used to determine the first required torque output by the engine control unit ECU when the speed change rate is greater than a first threshold and the output torque of the engine at the current time is greater than or equal to a second threshold, and when the first required torque is greater than a third threshold, based on the speed and the speed change rate, correct the first required torque to obtain a second required torque; the control unit is used to control the output torque of the engine at the first time based on the second required torque; the first time is after the current time.

[0022] In one possible manner, the determination unit is specifically used to: determine a first correction parameter based on the rotational speed and the rotational speed change rate; and correct the first required torque based on the first correction parameter to obtain a second required torque.

[0023] In one possible manner, the determination unit is specifically used to: determine a first parameter and a first correction coefficient corresponding to the rotational speed; determine the sum of the first parameter and the second parameter as the first correction parameter; and the second parameter is the product of the rotational speed change rate and the first correction coefficient.

[0024] In a possible manner, the determination unit is specifically configured to: when the initial required torque of the ECU is greater than a third threshold, correct the initial required torque based on preset parameters to obtain the first required torque.

[0025] In one possible embodiment, the device also includes: a correction unit; a determination unit, which is also used to determine the torque change rate of the engine when the speed change rate is less than or equal to the first threshold and / or the output torque of the engine at the current time is less than the second threshold and / or the required torque of the ECU is less than or equal to the third threshold; the determination unit is also used to obtain the required torque of the vehicle's power control unit PCU and the calculated torque of the calculation unit when the absolute value of the speed change rate is less than the fourth threshold and the absolute value of the engine's torque change rate is less than the fifth threshold; the correction unit is used to correct the required torque of the ECU based on the speed, the required torque of the PCU, the calculated torque, the output torque of the engine at the current time, and the required torque of the ECU to obtain the third required torque.

[0026] In one possible embodiment, the correction unit is specifically used to: when the absolute value of the difference between the required torque of the PCU and the output torque of the engine at the current time is less than a sixth threshold, and the absolute value of the difference between the calculated torque and the required torque of the ECU is less than a seventh threshold, based on the rotational speed, correct the required torque of the ECU to obtain a third required torque.

[0027] In one possible manner, the correction unit is specifically used to: determine a second correction parameter based on the rotational speed; and correct the required torque of the ECU based on the second correction parameter to obtain a third required torque.

[0028] According to a third aspect provided by the present application, a vehicle is provided, comprising a torque correction device.

[0029] According to the fourth aspect provided by the present application, an electronic device is provided, comprising: a processor; a memory for storing processor executable instructions; wherein the processor is configured to execute instructions to implement the method of the above-mentioned first aspect and any possible implementation manner thereof.

[0030] According to the fifth aspect provided by the present application, a computer-readable storage medium is provided. When the instructions in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device is enabled to execute the method in the above-mentioned first aspect and any possible implementation method thereof.

[0031] According to the sixth aspect provided by the present application, a computer program product is provided, the computer program product comprising computer instructions, and when the computer instructions are executed on an electronic device, the electronic device executes the method of the above-mentioned first aspect and any possible implementation manner thereof.

[0032] Therefore, the above technical features of the present application have the following beneficial effects:

[0033] (1) By real-time monitoring of the engine's output torque, speed and speed change rate, when it is identified that the speed change rate increases abnormally and the engine torque is large, the required torque output by the engine control unit ECU can be dynamically adjusted, thereby effectively preventing the runaway phenomenon and avoiding speed overshoot. Therefore, the present application can accurately eliminate the influence of the engine and motor torque accuracy.

[0034] (2) By real-time monitoring of the speed and speed change rate, the operating status of the engine can be accurately understood. Therefore, the first required torque can be corrected according to these dynamic data, which helps to ensure that the engine can operate stably under various operating conditions, prevent runaway, and avoid speed overshoot problems.

[0035] (3) The speed and speed change rate can be combined to determine the correction parameter, making the control more precise. The speed reflects the current operating state of the engine, while the speed change rate provides predictive information about the future state changes of the engine. Combining these two factors can more accurately determine the needs of the engine and adjust the output torque accordingly.

[0036] (4) The initial required torque can be corrected based on preset parameters to achieve precise control of the torque output. Adjusting these parameters can effectively limit the peak torque without sacrificing engine performance, thereby reducing the risk of runaway.

[0037] (5) By real-time monitoring of the engine speed change rate, output torque, and ECU and PCU required torque, we can have a more comprehensive understanding of the engine's operating status and the vehicle's power requirements. By correcting the ECU required torque based on these real-time data, we can ensure that the engine can operate in a more precise and stable manner under various operating conditions, thereby reducing the risk of abnormal phenomena such as runaway.

[0038] (6) When the required torque of the PCU is not much different from the actual output torque of the engine (i.e., the difference is less than the sixth threshold), and the calculated torque is also close to the required torque of the ECU (i.e., the difference is less than the seventh threshold), the required torque of the ECU can be corrected based on the speed, which can further enhance the coordination and consistency of various parts of the vehicle power system and ensure the stable operation of the entire power system.

[0039] (7) By introducing the rotational speed as a correction parameter, the required torque can be adjusted more accurately according to the current operating state of the engine, so that the engine can operate stably under various operating conditions.

[0040] It should be noted that the technical effects brought about by any implementation method in the second to sixth aspects can refer to the technical effects brought about by the corresponding implementation method in the first aspect, and will not be repeated here.

[0041] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute improper limitations on the present application.

[0043] Figure 1 is a schematic structural diagram of a vehicle according to an exemplary embodiment;

[0044] Figure 2 is a flow chart of a torque correction method according to an exemplary embodiment;

[0045] Figure 3 is a schematic diagram showing correction parameters corresponding to a rotation speed and a required torque according to an exemplary embodiment;

[0046] Figure 4is a schematic diagram of a torque correction process according to an exemplary embodiment;

[0047] Figure 5 is a block diagram of a torque correction device according to an exemplary embodiment;

[0048] Figure 6 It is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0049] In order to enable ordinary persons in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0050] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0051] In the embodiments of the present application, words such as "exemplary", "for example", or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary", "for example", or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example", or "for example" is intended to present related concepts in a specific way.

[0052] First, the relevant technologies involved in this application are explained to facilitate understanding by those skilled in the art.

[0053] With the vigorous development of the new energy vehicle industry, hybrid models are rapidly increasing their market share and gradually approaching pure electric models due to their advantage of providing the most optimized solutions for various vehicle use scenarios. In a series-configured hybrid system, the engine can work independently of the vehicle's operating conditions and output energy by driving the generator.

[0054] In the process of matching the engine and the generator, the peak power of the selected generator is often close to or slightly higher than the maximum power of the engine in the operating range. This design is intended to avoid the cost increase caused by selecting an oversized generator. However, in the actual large-scale quantitative production process, there is a certain deviation in the torque accuracy of the engine and the generator.

[0055] When the actual torque of the engine at the maximum power point is higher than the preset target torque and exceeds the torque limit of the generator, the engine speed will quickly overshoot, which may cause a runaway failure in extreme cases. If the speed overshoot cannot be effectively suppressed in time, it may cause damage or failure of transmission components such as connecting rods and torque dampers.

[0056] Normally, when speed overshoot occurs, the speed can be re-controlled by reducing the engine's requested torque or target torque. However, if the speed overshoot is large, large speed fluctuations and obvious noise may occur during the control process, and sometimes the speed overshoot cannot be completely suppressed.

[0057] In addition, in order to avoid the occurrence of speed overshoot, a strategy of reducing the preset value of the maximum requested torque of the engine can also be adopted to ensure that the upper limit of the deviation of the engine torque is lower than the lower limit of the torque deviation of the generator. However, although this strategy can reduce the risk of speed overshoot, it will also significantly reduce the maximum available output power of the engine, thereby sacrificing the power performance of the vehicle to a certain extent.

[0058] Related technology 1 proposes to compare the maximum allowable torque of the generator, the original target torque of the engine and the closed-loop speed torque during the speed regulation process, and take the minimum value of the three as the upper limit of the engine target torque to prevent runaway.

[0059] Related technology 2 proposes to reduce the engine target torque value and increase the engine target speed by reducing the engine maximum torque and reconfiguring the engine target torque and the generator target speed to ensure that the actual engine torque can meet the requirements of the redistributed engine target torque.

[0060] As described in the background technology, in order to solve the problem that the related technology cannot accurately eliminate the influence of the torque accuracy of the engine and the motor, the present application provides a torque correction method, which can obtain the output torque, speed and speed change rate of the engine of the vehicle at the current time, and determine the first required torque output by the engine control unit (ECU) when the speed change rate is greater than a first threshold and the output torque of the engine at the current time is greater than or equal to a second threshold. When the first required torque is greater than a third threshold, the first required torque is corrected based on the speed and the speed change rate to obtain a second required torque. Based on the second required torque, the output torque of the engine at the first time is controlled, wherein the first time is after the current time, so as to predict and avoid the occurrence of a runaway failure in advance and eliminate the influence of the torque accuracy of the engine and the motor.

[0061] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0062] The discharge control method provided in the embodiment of the present application can be applied in a vehicle. A vehicle can also be referred to as a vehicle, a mobile carrier, an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), a fuel cell vehicle (FCV), an autonomous vehicle, an intelligent and connected vehicle (ICV), a driverless vehicle, etc.

[0063] In the embodiments of the present application, the vehicle may be a sedan, a sport utility vehicle (SUV), a truck, an electric vehicle, a motorcycle, a tricycle, a special vehicle (such as an ambulance, a fire truck, a police car, etc.), an unmanned taxi, an intelligent networked bus, an automatic driving logistics vehicle, an electric truck, etc. In addition, the method is also applicable to various special vehicles, such as agricultural vehicles, mining vehicles, forestry vehicles, airport vehicles, port vehicles, etc. The present application does not impose specific restrictions on this.

[0064] Figure 1 A schematic structural diagram of a vehicle 100 is shown.

[0065] The vehicle 100 may include a torque correction device 101 and a data acquisition device 102. A communication connection may be established between the torque correction device 101 and the data acquisition device 102.

[0066] In practical applications, the torque correction device 101 may be communicatively connected to one or more data acquisition devices 102 .

[0067] For ease of understanding, the present application takes the communication connection between a torque correction device 101 and a data acquisition device 102 as an example for explanation.

[0068] Optional, Figure 1 The torque correction device 101 and the data acquisition device 102 may be functional modules integrated into the same device, or may be two devices independently provided. This application does not impose any limitation on this.

[0069] It is easy to understand that when the torque correction device 101 and the data acquisition device 102 are functional modules integrated in the same device, the communication method between the torque correction device 101 and the data acquisition device 102 is the communication between the internal modules of the device. In this case, the communication process between the two is the same as "the communication process between the torque correction device 101 and the data acquisition device 102 when they are independently set".

[0070] For ease of understanding, the present application is mainly described by taking the example that the torque correction device 101 and the data acquisition device 102 are independently configured.

[0071] Figure 1 The torque correction device 101 can receive the output torque, speed and speed change rate of the engine of the vehicle at the current time sent by the data acquisition device 102, and determine the first required torque output by the engine control unit ECU when the speed change rate is greater than the first threshold and the output torque of the engine at the current time is greater than or equal to the second threshold, and when the first required torque is greater than the third threshold, based on the speed and the speed change rate, correct the first required torque to obtain the second required torque, thereby controlling the output torque of the engine at the first time based on the second required torque.

[0072] Optionally, Figure 1 The torque correction device 101 and the data acquisition device 102 may be a terminal, a server, or other types of electronic devices. Figure 1 What is shown in the figure is only an example of the equipment form of the torque correction device 101 and the data acquisition device 102, and does not constitute a limitation thereto.

[0073] In the case where the torque correction device 101 and the data acquisition device 102 are terminals, the terminal can be a device for providing voice and / or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. The terminal can communicate with one or more core networks via a radio access network (RAN). The terminal can be a mobile terminal, such as a computer with a mobile terminal, or a mobile device built into the vehicle 100, which exchanges language and / or data with a radio access network, such as a mobile phone, a tablet computer, a laptop computer, a netbook, a personal digital assistant (PDA). This application does not impose any restrictions on this.

[0074] When the torque correction device 101 and the data acquisition device 102 are servers, the server may be a single server, or a server cluster consisting of multiple servers. In some implementations, the server cluster may also be a distributed cluster. This application does not impose any restrictions on this.

[0075] It should be noted that the structure illustrated in the embodiment of the present application does not constitute a limitation on the vehicle 100. It may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0076] For ease of understanding, the torque correction method provided by the present application is specifically introduced below with reference to the accompanying drawings.

[0077] Figure 2 is a flow chart of a torque correction method according to an exemplary embodiment. Figure 2 As shown, the torque correction method includes the following steps: S201-S203.

[0078] S201. Obtain the output torque, speed, and speed change rate of the engine of the vehicle at the current time.

[0079] In a possible implementation, the torque correction device can obtain the output torque and speed of the engine of the vehicle at the current time based on a data acquisition device such as a sensor. The torque correction device can calculate the speed change rate at the current time based on the speed.

[0080] Alternatively, the output torque of the engine of the vehicle at the current time may be used as the torque calculated by feedback from the generator.

[0081] S202. When the speed change rate is greater than the first threshold and the output torque of the engine at the current time is greater than or equal to the second threshold, determine the first required torque output by the engine control unit ECU, and when the first required torque is greater than the third threshold, correct the first required torque based on the speed and the speed change rate to obtain the second required torque.

[0082] In one possible implementation, when the speed change rate is greater than a first threshold and the output torque of the engine at the current time is greater than or equal to a second threshold, the torque correction device can determine the first required torque output by the engine control unit ECU, that is, the torque correction device can correct the initial required torque based on preset parameters to obtain the first required torque when the initial required torque of the ECU is greater than a third threshold, and correct the first required torque based on the speed and the speed change rate to obtain the second required torque when the first required torque is greater than the third threshold.

[0083] Optionally, when the initial required torque of the ECU is greater than a third threshold, the torque correction device corrects the initial required torque based on preset parameters. The specific implementation time for obtaining the first required torque can be performed between determining the output torque, speed and speed change rate of the engine of the vehicle at the current time, and the present application does not impose specific restrictions on this.

[0084] In one example, after the engine is started, the torque correction device or power control unit (PCU) can send the engine's target torque (first required torque) and target speed command to the ECU and power electronics unit (PEU) according to the preset energy management strategy and vehicle power generation demand. In this process, the PCU can verify the requested engine target torque Tqreq to determine whether it exceeds the maximum torque Tq0(n) allowed by the anti-runaway control logic set at the current speed, i.e., the third threshold.

[0085] Optionally, Tq0(n) can be set to 90% of the engine's external characteristic torque (i.e., the maximum torque that the engine can generate at a certain speed), or can be set to 95% of the engine's external characteristic torque. This application does not impose any specific restrictions on this.

[0086] When Tqreq or the first required torque Tqecu exceeds Tq0(n), the torque correction device or PCU corrects the first required torque based on the preset parameter ΔTqc(n), that is, Tqecu=Tqecu-ΔTqc(n), thereby actively reducing the target torque and utilizing previously accumulated data and experience to effectively reduce the probability of run-away failure and ensure the stability and safety of engine operation.

[0087] Optionally, the preset parameter ΔTqc(n) may be a correction value determined based on historical data accumulation, or a preset correction value. For example, for a new vehicle, the preset parameter ΔTqc(n) may be set to 0, or may be set to 5 Newton meters (Nm). This application does not impose any specific restrictions on this.

[0088] In a possible implementation, the torque correction device can determine the first correction parameter based on the rotational speed and the rotational speed change rate. The torque correction device can correct the first required torque based on the first correction parameter to obtain the second required torque. That is, the torque correction device can determine the first parameter and the first correction coefficient corresponding to the rotational speed, thereby determining the sum of the first parameter and the second parameter as the first correction parameter.

[0089] The second parameter is the product of the rotation speed change rate and the first correction coefficient.

[0090] In another example, after completing the correction of the initial required torque, the torque correction device can determine that there is a risk of speed overshoot or run-away failure when the speed change rate Δn / Δt is greater than a first threshold (e.g., 0) and the output torque TqGM(n) of the engine at the current time (i.e., the generator feedback torque) is not less than a second threshold (e.g., the maximum allowable torque TqGM_Max(n) designed for the generator), that is, the first required torque needs to be corrected.

[0091] Optionally, the second threshold value (TqGM_Max(n)) may be set to 95% to 97% of the peak external characteristic of the generator, or may be set to 90% to 95% of the peak external characteristic of the generator. The present application does not impose any specific limitation on this.

[0092] In the case of a risk of speed overshoot or runaway failure, the torque correction device can perform an open-loop proportional integral (PI) correction on the first parameter ΔTqc(n)1 corresponding to the current speed range according to the current speed change rate to obtain a correction parameter ΔTqc(n). The correction method can satisfy the following first formula:

[0093] ΔTqc(n)=ΔTqc(n)1-k1×Δn / ΔkFirst formula

[0094] Wherein, ΔTqc(n) can be used to characterize the correction parameter. ΔTqc(n)1 can be used to characterize the first parameter. K1 can be used to characterize the first correction coefficient. Δn / Δt can be used to characterize the speed change rate.

[0095] For example, Figure 3 As shown, Figure 3 A schematic diagram showing correction parameters corresponding to the rotational speed and required torque is shown.

[0096] Among them, ΔTqc1, ΔTqc2, ΔTqc3, ΔTqc4, ΔTqc5, ΔTqc6, ΔTqc7, ΔTqc8, ΔTqc9, ΔTqc10, ΔTqc11, and ΔTqc12 can be used to characterize different speeds (N1, N2, N3) and correction parameters corresponding to the required torque, respectively. Figure 3 The engine characteristics, generator peak characteristics, and a first threshold and a second threshold are also included.

[0097] In one possible implementation, the correction parameters corresponding to the rotational speed and required torque can also include information on dimensions such as temperature and altitude, thereby enabling more accurate torque correction and anti-runaway control.

[0098] S203: Based on the second required torque, control the output torque of the engine at the first time.

[0099] Among them, the first time may be after the current time.

[0100] In one possible manner, the torque correction device can control the output torque of the engine at the first time based on the second required torque, and continuously detect the torque output by the engine and the required torque of the ECU. The torque correction device can make corresponding correction strategies based on the torque output by the engine and the required torque of the ECU.

[0101] In one example, when the second required torque Tqreq is greater than the third threshold value Tq0(n), the torque correction device can correct the second required torque again until the corrected required torque is less than or equal to the third threshold value, thereby reducing the risk of runaway failure. Alternatively, until the torque TqGM(n) of the engine data drops below the second threshold value TqGM_Max(n), indicating that the engine speed has reached a controllable state, thereby ensuring the stable operation of the entire power system.

[0102] Based on the above Figure 2 According to the technical solution in the invention, the present application can monitor the output torque, speed and speed change rate of the engine in real time. When it is identified that the speed change rate increases abnormally and the engine torque is large, the required torque output by the engine control unit ECU is dynamically adjusted, thereby effectively preventing the runaway phenomenon and avoiding speed overshoot. Therefore, the present application can accurately eliminate the influence of the torque accuracy of the engine and the motor.

[0103] In some embodiments, the torque correction method provided in the embodiments of the present application also includes the following steps: S301-S303.

[0104] S301. Determine the engine torque change rate when the speed change rate is less than or equal to a first threshold and / or the engine output torque at the current time is less than a second threshold and / or the ECU required torque is less than or equal to a third threshold.

[0105] In one possible implementation, the torque correction device can determine the torque change rate of the engine based on the output torque of the engine when the speed change rate is less than or equal to a first threshold and / or the output torque of the engine at the current time is less than a second threshold and / or the required torque of the ECU is less than or equal to a third threshold.

[0106] S302: When the absolute value of the rotation speed change rate is less than the fourth threshold value and the absolute value of the engine torque change rate is less than the fifth threshold value, the required torque of the vehicle power control unit PCU and the calculated torque of the calculation unit are obtained.

[0107] S303 , based on the rotation speed, the required torque of the PCU, the calculated torque, the output torque of the engine at the current time, and the required torque of the ECU, correct the required torque of the ECU to obtain a third required torque.

[0108] In one possible implementation, the torque correction device can correct the required torque of the ECU based on the speed to obtain a third required torque when the absolute value of the difference between the required torque of the PCU and the output torque of the engine at the current time is less than a sixth threshold and the absolute value of the difference between the calculated torque and the required torque of the ECU is less than a seventh threshold.

[0109] In yet another possible implementation, the torque correction device may determine a second correction parameter based on the rotational speed, and based on the second correction parameter, correct the required torque of the ECU to obtain a third required torque.

[0110] In one example, the torque correction device can judge the stability of the first required torque Tqreq and the current engine speed when the ECU's required torque Tqreq is less than or equal to the second threshold value Tq0(n), or there is no risk of speed overshoot (that is, the speed change rate Δn / Δt is greater than the first threshold value 0 and the engine output torque TqGM(n) is not less than the second threshold value TqGM_Max(n)). That is, it can judge whether the speed change rate is less than the fourth threshold value e1 (that is, Δn / Δt<e1) or the torque change rate is less than the fifth threshold value e2 (that is, ΔTqreq / Δt<e2) is simultaneously satisfied. If both are satisfied, it continues to judge whether it is necessary to perform a correction of the steady-state engine torque deviation. If not, it returns to S201.

[0111] When the speed change rate is less than the fourth threshold value e1 and the torque change rate is less than the fifth threshold value e2, the torque correction device can calculate the difference ΔTqa between the PCU demand torque Tqreq and the engine output torque TqGM, and determine whether the difference is less than or equal to the preset sixth threshold value e3 (i.e. |Tqreq-TqGM|<e3). At the same time, it is also necessary to calculate the difference ΔTqb between the ECU demand torque Tqecu and the calculated torque Tqeng calculated by the calculation unit, and determine whether the difference exceeds the seventh threshold value e4 (i.e. |Tqecu-Tqeng|>e4), thereby eliminating the engine torque control failure caused by factors such as supercharger failure. If the absolute value of the difference between the PCU demand torque and the engine output torque at the current time is less than the sixth threshold, and the absolute value of the difference between the calculated torque and the ECU demand torque is less than the seventh threshold, the torque correction device can enable the steady-state torque correction of the engine. If not satisfied, return to S201.

[0112] The engine steady-state torque correction includes: the torque correction device can perform an open-loop proportional-integral (PI) correction on the stored self-learning correction value based on the calculated correction parameter ΔTqa, that is, the second formula:

[0113] ΔTqc(n)=ΔTqc(n)2+k2×ΔTqaThe second formula

[0114] Among them, ΔTqc(n) can be used to characterize the second correction parameter. ΔTqc(n)2 can be used to characterize the original correction parameter. k2 can be used to characterize the second correction coefficient. ΔTqa can be used to characterize the correction parameter calculated based on the rotation speed.

[0115] The torque correction device can correct the engine target torque based on the corrected second correction parameter ΔTqc(n), that is, Tqecu=Tqecu-ΔTqc(n). After the correction is completed, the torque correction device can again determine whether the torque difference ΔTqa is less than or equal to the eighth threshold value e5 (that is, ΔTqa<e5). If the torque difference ΔTqa is less than or equal to the eighth threshold value e5, the torque correction device can further determine whether the engine needs to be stopped. If the torque difference ΔTqa is greater than the eighth threshold value e5, the torque correction device can return to S201.

[0116] Based on the above technical solution, the present application monitors the engine speed change rate, output torque and required torque of ECU and PCU in real time to have a more comprehensive understanding of the engine's operating status and the vehicle's power requirements, and corrects the ECU required torque based on these real-time data, thereby ensuring that the engine can operate in a more precise and stable manner under various operating conditions, thereby reducing the risk of abnormal phenomena such as runaway.

[0117] In some embodiments, Figure 4 The figure shows a schematic diagram of a torque correction process.

[0118] In a possible implementation, when the engine is started, the torque correction device can correct the initial required torque based on the correction parameter to obtain the first required torque when the initial required torque of the ECU is greater than the third threshold. The torque correction device can update the correction parameter based on the speed and the speed change rate when the speed change rate is greater than the first threshold and the output torque of the engine at the current time is greater than or equal to the second threshold, and return to determine whether the initial required torque is greater than the third threshold.

[0119] The torque correction device can determine whether the absolute value of the speed change rate is less than the fourth threshold and the torque change rate is less than the fifth threshold when the speed change rate is greater than the first threshold and the output torque of the engine at the current time is greater than or equal to the second threshold, otherwise return to determine whether the initial required torque is greater than the third threshold.

[0120] The torque correction device can determine whether the absolute value of the difference between the required torque of the PCU and the output torque of the engine at the current time is less than the sixth threshold, and whether the absolute value of the difference between the calculated torque and the required torque of the ECU is less than the seventh threshold when the absolute value of the speed change rate is less than the fourth threshold and the torque change rate is less than the fifth threshold, otherwise it returns to determine whether the initial required torque is greater than the third threshold.

[0121] The torque correction device can update the correction parameters based on the rotational speed and determine whether the correction parameters are within the error range when the absolute value of the difference between the required torque of the PCU and the output torque of the engine at the current time is less than the sixth threshold, and the absolute value of the difference between the calculated torque and the required torque of the ECU is less than the seventh threshold, otherwise it returns to determine whether the initial required torque is greater than the third threshold.

[0122] The torque correction device can determine whether the engine is shut down when the correction parameter is within the error range, and otherwise return to determine whether the initial required torque is greater than the third threshold.

[0123] The torque correction device can end the process when the engine is stopped, otherwise return to determine whether the initial required torque is greater than the third threshold.

[0124] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of the method. In order to realize the above functions, the torque correction device or electronic device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed in this article, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0125] The embodiments of the present application can exemplarily divide the functional modules of the torque correction device or the electronic device according to the above method. For example, the torque correction device or the electronic device can include functional modules corresponding to the functional divisions, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiments of the present application is schematic and is only a logical functional division. There may be other division methods in actual implementation.

[0126] Figure 5 is a block diagram of a torque correction device according to an exemplary embodiment. Figure 5 The torque correction device includes: an acquisition unit 401, a determination unit 402, a control unit 403 and a correction unit 404.

[0127] In one possible manner, the acquisition unit 401 is used to acquire the output torque, speed and speed change rate of the engine of the vehicle at the current time.

[0128] In one possible manner, the determination unit 402 is used to determine the first required torque output by the engine control unit ECU when the speed change rate is greater than the first threshold and the output torque of the engine at the current time is greater than or equal to the second threshold, and to correct the first required torque based on the speed and the speed change rate to obtain the second required torque when the first required torque is greater than a third threshold.

[0129] In one possible manner, the control unit 403 is used to control the output torque of the engine at a first time based on the second required torque; the first time is after the current time.

[0130] In a possible manner, the determination unit 402 is specifically configured to: determine a first correction parameter based on the rotational speed and the rotational speed change rate; and correct the first required torque based on the first correction parameter to obtain a second required torque.

[0131] In one possible manner, the determination unit 402 is specifically used to: determine a first parameter and a first correction coefficient corresponding to the rotational speed; determine the sum of the first parameter and the second parameter as the first correction parameter; and the second parameter is the product of the rotational speed change rate and the first correction coefficient.

[0132] In a possible manner, the determination unit 402 is specifically configured to: when the initial required torque of the ECU is greater than a third threshold, correct the initial required torque based on preset parameters to obtain the first required torque.

[0133] In one possible embodiment, the determination unit 402 is also used to determine the torque change rate of the engine when the speed change rate is less than or equal to a first threshold and / or the output torque of the engine at the current time is less than a second threshold and / or the required torque of the ECU is less than or equal to a third threshold.

[0134] In one possible manner, the determination unit 402 obtains the required torque of the vehicle's power control unit PCU and the calculated torque of the calculation unit when the absolute value of the speed change rate is less than the fourth threshold and the absolute value of the engine's torque change rate is less than the fifth threshold.

[0135] In one possible manner, the correction unit 404 is used to correct the required torque of the ECU based on the rotational speed, the required torque of the PCU, the calculated torque, the output torque of the engine at the current time, and the required torque of the ECU to obtain a third required torque.

[0136] In one possible embodiment, the correction unit 404 is specifically used to: when the absolute value of the difference between the required torque of the PCU and the output torque of the engine at the current time is less than the sixth threshold, and the absolute value of the difference between the calculated torque and the required torque of the ECU is less than the seventh threshold, based on the rotational speed, correct the required torque of the ECU to obtain a third required torque.

[0137] In a possible manner, the correction unit 404 is specifically configured to: determine a second correction parameter based on the rotational speed; and correct the required torque of the ECU based on the second correction parameter to obtain a third required torque.

[0138] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0139] Figure 6 FIG. 1 is a block diagram of an electronic device according to an exemplary embodiment. Figure 6 As shown, the electronic device includes but is not limited to: a processor 501 and a memory 502 .

[0140] The memory 502 is used to store executable instructions of the processor 501. It can be understood that the processor 501 is configured to execute instructions to implement the torque correction method in the above embodiment.

[0141] It should be noted that those skilled in the art can understand that Figure 6 The electronic device structure shown in the figure does not constitute a limitation on the electronic device, and the electronic device may include Figure 6 More or fewer components may be shown, or certain components may be combined, or the components may be arranged differently.

[0142] The processor 501 is the control center of the electronic device. It uses various interfaces and lines to connect various parts of the entire electronic device. By running or executing software programs and / or modules stored in the memory 502, and calling data stored in the memory 502, it performs various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole. The processor 501 may include one or more processing units. Optionally, the processor 501 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 501.

[0143] The memory 502 can be used to store software programs and various data. The memory 502 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application program required by at least one functional module (such as a determination unit, a processing unit, etc.), etc. In addition, the memory 502 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0144] In an exemplary embodiment, a computer-readable storage medium including instructions is also provided, such as a memory 502 including instructions. The above instructions can be executed by a processor 501 of an electronic device to implement the method in the above embodiment.

[0145] In actual implementation, Figure 5 The functions of the acquisition unit 401, the determination unit 402, the control unit 403 and the correction unit 404 in Figure 6 The processor 501 in the embodiment calls the computer program stored in the memory 502. The specific execution process can refer to the description of the method part in the above embodiment, which will not be repeated here.

[0146] Optionally, the computer-readable storage medium may be a non-temporary computer-readable storage medium, for example, the non-temporary computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0147] In an exemplary embodiment, the present application also provides a computer program product including one or more instructions, and the one or more instructions can be executed by the processor 501 of the electronic device to complete the method in the above embodiment.

[0148] It should be noted that when the instructions in the above-mentioned computer-readable storage medium or one or more instructions in the computer program product are executed by the processor of the electronic device, the various processes of the above-mentioned method embodiment are implemented, and the same technical effect as the above-mentioned method can be achieved. To avoid repetition, they will not be repeated here.

[0149] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0150] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0151] The units described as separate components may or may not be physically separated, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0152] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0153] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or the full classification part or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium, including a number of instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to execute the full classification part or part of the steps of each embodiment method of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, ROM, RAM, disk or CD and other media that can store program code.

[0154] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A torque correction method, characterized in that: include: Obtain the output torque, speed and speed change rate of the vehicle's engine at the current time; When the speed change rate is greater than a first threshold and the output torque of the engine at the current time is greater than or equal to a second threshold, determining a first required torque of an engine control unit ECU, and when the first required torque is greater than a third threshold, correcting the first required torque based on the speed and the speed change rate to obtain a second required torque; Based on the second required torque, the output torque of the engine is controlled at a first time; the first time is after the current time.

2. The method according to claim 1, characterized in that The step of correcting the first required torque based on the speed and the speed change rate to obtain a second required torque includes: determining a first correction parameter based on the rotational speed and the rotational speed change rate; The first required torque is corrected based on the first correction parameter to obtain a second required torque.

3. The method according to claim 2, characterized in that The determining of the correction parameter based on the rotational speed and the rotational speed change rate comprises: Determining a first parameter and a first correction coefficient corresponding to the rotation speed; The sum of the first parameter and the second parameter is determined as the first correction parameter; the second parameter is the product of the rotational speed change rate and the first correction coefficient.

4. The method according to claim 2 or 3, characterized in that: The method of determining a first required torque of an engine control unit ECU further comprises: When the initial required torque of the ECU is greater than the third threshold, the initial required torque is corrected based on preset parameters to obtain the first required torque.

5. The method according to claim 4, characterized in that The vehicle includes a computing unit; the method further includes: Determine the torque change rate of the engine when the speed change rate is less than or equal to the first threshold and / or the output torque of the engine at the current time is less than the second threshold and / or the required torque of the ECU is less than or equal to the third threshold; When the absolute value of the speed change rate is less than a fourth threshold value, and the absolute value of the engine torque change rate is less than a fifth threshold value, obtaining a required torque of a power control unit PCU of the vehicle and a calculated torque of the calculation unit; Based on the rotation speed, the required torque of the PCU, the calculated torque, the output torque of the engine at the current time, and the required torque of the ECU, the required torque of the ECU is corrected to obtain a third required torque.

6. The method according to claim 5, characterized in that The method of correcting the torque required by the ECU based on the rotation speed, the torque required by the PCU, the calculated torque, the output torque of the engine at the current time, and the torque required by the ECU to obtain a third torque required includes: When the absolute value of the difference between the required torque of the PCU and the output torque of the engine at the current time is less than the sixth threshold, and the absolute value of the difference between the calculated torque and the required torque of the ECU is less than the seventh threshold, the required torque of the ECU is corrected based on the speed to obtain a third required torque.

7. The method according to claim 6, characterized in that The step of correcting the required torque of the ECU based on the rotation speed to obtain a third required torque includes: Based on the rotation speed, determining a second correction parameter; Based on the second correction parameter, the required torque of the ECU is corrected to obtain a third required torque.

8. A torque correction device, characterized in that: The device comprises: an acquisition unit, a determination unit and a control unit; The acquisition unit is used to acquire the output torque, speed and speed change rate of the engine of the vehicle at the current time; The determination unit is used to determine a first required torque output by an engine control unit ECU when the speed change rate is greater than a first threshold and the output torque of the engine at the current time is greater than or equal to a second threshold, and to correct the first required torque based on the speed and the speed change rate to obtain a second required torque when the first required torque is greater than a third threshold; The control unit is used to control the output torque of the engine at a first time based on the second required torque; the first time is after the current time.

9. The device according to claim 8, characterized in that The determining unit is specifically configured to: determining a first correction parameter based on the rotational speed and the rotational speed change rate; The first required torque is corrected based on the first correction parameter to obtain a second required torque.

10. The device according to claim 9, characterized in that The determining unit is specifically configured to: Determining a first parameter and a first correction coefficient corresponding to the rotation speed; The sum of the first parameter and the second parameter is determined as the first correction parameter; the second parameter is the product of the rotational speed change rate and the first correction coefficient.

11. The device according to claim 9 or 10, characterized in that The determining unit is specifically configured to: When the initial required torque of the ECU is greater than the third threshold, the initial required torque is corrected based on preset parameters to obtain the first required torque.

12. The device according to claim 11, characterized in that The device further comprises: a correction unit; The determination unit is further configured to determine the torque change rate of the engine when the speed change rate is less than or equal to the first threshold and / or the output torque of the engine at the current time is less than the second threshold and / or the required torque of the ECU is less than or equal to the third threshold; The acquisition unit is further configured to acquire the required torque of the power control unit PCU of the vehicle and the calculated torque of the calculation unit when the absolute value of the speed change rate is less than a fourth threshold value and the absolute value of the engine torque change rate is less than a fifth threshold value; The correction unit is used to correct the required torque of the ECU based on the rotational speed, the required torque of the PCU, the calculated torque, the output torque of the engine at the current time, and the required torque of the ECU to obtain a third required torque.

13. The device according to claim 12, characterized in that The correction unit is specifically used for: When the absolute value of the difference between the required torque of the PCU and the output torque of the engine at the current time is less than the sixth threshold, and the absolute value of the difference between the calculated torque and the required torque of the ECU is less than the seventh threshold, the required torque of the ECU is corrected based on the speed to obtain a third required torque.

14. The device according to claim 13, characterized in that The correction unit is specifically used for: Based on the rotation speed, determining a second correction parameter; Based on the second correction parameter, the required torque of the ECU is corrected to obtain a third required torque.

15. A vehicle, characterized in that: The vehicle comprises the apparatus of any one of claims 8 to 14.

16. An electronic device, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is configured to execute the instructions to implement the method according to any one of claims 1 to 7.

17. A computer-readable storage medium, characterized in that: When the computer-executable instructions stored in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device is capable of performing the method as claimed in any one of claims 1 to 7.

18. A computer program product comprising instructions, characterized in that When the instructions are executed by a computer, the computer is caused to perform the method according to any one of claims 1 to 7.

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