Torque accuracy calibration method, device, equipment and storage medium

Abstract

The present application relates to a torque accuracy verification method, device, equipment and storage medium, and relates to the field of automobile transmission technology. The method includes: the torque accuracy verification device obtains the first speed and the second speed of the vehicle, the first speed is the speed of the vehicle after running in a steady-state state for a preset period of time, and the second speed is the speed after adjusting the motor torque and the engine torque of the vehicle based on the first torque change rate, and the total torque of the adjusted motor torque and the adjusted engine torque is the same as the total torque of the motor torque and the engine torque before the adjustment. Further, the torque accuracy verification device determines the speed difference between the first speed and the second speed, and the speed difference is the absolute value of the difference between the first speed and the second speed; and when the speed difference is greater than the first preset speed, it is determined that there is a deviation in the torque accuracy of the engine. In this way, it is possible to verify whether there is a deviation in the torque accuracy of the vehicle's engine.

Description

Technical Field

[0001] The present application relates to the field of automobile transmission technology, in particular to the field of hybrid vehicle transmission technology, and specifically to a torque accuracy calibration method, device, equipment and storage medium. Background Art

[0002] Currently, torque accuracy is typically defined as the deviation between the actual torque delivered by the engine and the signaled torque. When the hybrid vehicle's engine is engaged, the vehicle's powertrain allocates engine torque and electric motor torque based on energy management strategies, current vehicle state, and driver input to ensure the actual torque output meets the driver's expectations.

[0003] However, engine operation is affected by environmental factors and the characteristics of the hardware itself. When environmental factors change, or as the vehicle's hardware status changes with age, the accuracy of the torque generated by the engine will be affected. In the event of a discrepancy between the actual torque delivered by the engine and the signaled torque, the vehicle's powertrain will not be able to accurately control the torque, significantly impacting the overall driving experience. For example, under the same acceleration requirement, when the actual torque is reduced, the actual torque applied to the wheel will be less than the required torque because the vehicle's powertrain cannot recognize the torque deviation at this time. This will significantly reduce the overall vehicle's acceleration experience, affecting the user's driving experience. Summary of the Invention

[0004] One of the purposes of the present application is to provide a torque accuracy verification method, device, equipment and storage medium for verifying whether there is a deviation in the torque accuracy of a vehicle's engine.

[0005] In order to achieve the above objectives, the technical solutions adopted in this application are as follows:

[0006] According to a first aspect of the present application, a torque accuracy verification method is provided, comprising: a torque accuracy verification device obtaining a first speed and a second speed of a vehicle, wherein the first speed is the speed of the vehicle after it has been operating in a steady-state state for a preset period of time, and the second speed is the speed after adjusting the motor torque and engine torque of the vehicle based on a first torque change rate, wherein the total torque of the adjusted motor torque and the adjusted engine torque is the same as the total torque of the motor torque and the adjusted engine torque before the adjustment. Furthermore, the torque accuracy verification device determines a speed difference between the first speed and the second speed, wherein the speed difference is the absolute value of the difference between the first speed and the second speed; and if the speed difference is greater than a first preset speed, determines that there is a deviation in the torque accuracy of the engine.

[0007] According to the above-mentioned technical means, in the torque accuracy verification method provided by the present application, when the vehicle is operating in a steady-state condition, the engine and the motor provide power to the vehicle at the same time, and the speed of the vehicle is related to the total torque provided by the engine and the motor. When other parameters remain unchanged, the size of the engine torque and the motor torque are adjusted on the basis of not changing the total torque provided by the engine and the motor. By monitoring the speed change of the vehicle, when the speed difference between the second speed of the vehicle after adjustment and the first speed of the vehicle before adjustment is greater than the first preset speed, it can be determined that there is a deviation in the torque accuracy of the engine.

[0008] In a possible embodiment, when the speed difference is greater than the first preset speed, the above method also includes: controlling the engine to operate at a target engine torque, and controlling the motor to operate at a target motor torque; the target engine torque is the current signal torque of the engine, and the target motor torque is the current signal torque of the motor.

[0009] According to the above technical means, the present application can stop adjusting the torque of the engine and the motor when it is determined that there is a deviation in the engine torque, thereby avoiding excessive changes in vehicle speed that affect the driver's riding experience.

[0010] In one possible embodiment, when the target engine torque is greater than the engine torque before adjustment, the method further includes: obtaining a third speed, the third speed being the speed after the engine torque remains unchanged and the torque of the motor is adjusted based on the second torque change rate, the adjusted motor torque being greater than the motor torque before adjustment; when the third speed is equal to the first speed, determining the current motor torque of the motor; and determining the torque deviation value of the engine when running at the target engine torque based on the current motor torque and the target motor torque.

[0011] According to the above technical means, the present application can determine the specific torque deviation value of the engine when it is running at the target engine torque based on the control of the engine torque and the motor torque when it is determined that there is a deviation in the torque accuracy of the engine and the target engine torque is greater than the engine torque before adjustment.

[0012] In a possible embodiment, when the target engine torque is less than the engine torque before adjustment, the method further includes: obtaining a fourth speed, the fourth speed being the speed after the engine torque remains unchanged and adjusting the torque of the motor based on the third torque change rate, the adjusted motor torque being less than the motor torque before adjustment; when the fourth speed is equal to the first speed, determining the current motor torque of the motor; and determining the torque deviation value of the engine when running at the target engine torque based on the current motor torque and the target motor torque.

[0013] According to the above technical means, the present application can determine the specific torque deviation value of the engine when it is running at the target engine torque based on the control of the engine torque and the motor torque when it is determined that there is a deviation in the torque accuracy of the engine and the target engine torque is less than the engine torque before adjustment.

[0014] In one possible implementation, determining the torque deviation value of the engine when running at the target engine torque based on the current motor torque and the target motor torque includes: determining the torque difference between the current motor torque and the target motor torque; and determining the torque deviation value of the engine when running at the target engine torque based on the torque difference.

[0015] Based on the above technical means, the present application provides a specific implementation method that can determine the torque deviation value.

[0016] In a possible implementation, the method further includes: adjusting a torque compensation value of the motor when the engine operates at a target engine torque based on the torque deviation value.

[0017] According to the above technical means, the present application can compensate the engine torque based on the determined torque compensation value when the engine runs at the target engine torque again when there is a deviation in the torque accuracy of the engine.

[0018] In one possible embodiment, the above method also includes: when the speed difference is less than a second preset speed, determining that there is no deviation in the torque accuracy of the engine when it runs at the target engine torque, the second preset speed is less than the first preset speed, and the target engine torque is the current signal torque of the engine.

[0019] According to the above technical means, the present application can determine whether there is a deviation in the torque accuracy of the engine.

[0020] In one possible embodiment, the steady-state operating conditions include: the vehicle's accelerator pedal opening fluctuation is less than a preset opening fluctuation, the slope change rate of the road on which the vehicle is traveling is less than a preset slope change rate, the vehicle's speed fluctuation is less than a preset speed fluctuation, the engine's torque fluctuation is less than a preset torque fluctuation, and the motor's torque fluctuation is less than a preset torque fluctuation.

[0021] According to the second aspect provided by the present application, a torque accuracy verification device is provided, comprising an acquisition unit and a determination unit. The acquisition unit is used to acquire a first speed and a second speed of the vehicle, wherein the first speed is the speed of the vehicle after running in a steady-state condition for a preset period of time, and the second speed is the speed after adjusting the motor torque and the engine torque of the vehicle based on the first torque change rate, and the total torque of the adjusted motor torque and the adjusted engine torque is the same as the total torque of the motor torque and the engine torque before the adjustment. The determination unit is used to determine the speed difference between the first speed and the second speed, wherein the speed difference is the absolute value of the difference between the first speed and the second speed. The determination unit is also used to determine that there is a deviation in the torque accuracy of the engine when the speed difference is greater than the first preset speed.

[0022] In one possible embodiment, the torque accuracy verification device further includes a processing unit. The processing unit is configured to control the engine to operate at a target engine torque and the motor to operate at a target motor torque; the target engine torque is the current signal torque of the engine, and the target motor torque is the current signal torque of the motor.

[0023] In one possible implementation, the acquisition unit is further configured to acquire a third speed, where the third speed is the speed after adjusting the motor torque based on the second torque change rate while the engine torque remains unchanged, wherein the adjusted motor torque is greater than the pre-adjusted motor torque. The determination unit is further configured to determine the current motor torque of the motor when the third speed is equal to the first speed; and determine a torque deviation value when the engine is operating at the target engine torque based on the current motor torque and the target motor torque.

[0024] In a possible embodiment, the above-mentioned acquisition unit is also used to obtain a fourth speed, which is the speed after the torque of the engine remains unchanged and the torque of the motor is adjusted based on the third torque change rate, and the adjusted motor torque is less than the motor torque before adjustment; the above-mentioned determination unit is also used to determine the current motor torque of the motor when the fourth speed is equal to the first speed; and determine the torque deviation value of the engine when it is running at the target engine torque based on the current motor torque and the target motor torque.

[0025] In a possible implementation, the determination unit is specifically configured to determine a torque difference between a current motor torque and a target motor torque; and determine a torque deviation value when the engine operates at the target engine torque based on the torque difference.

[0026] In a possible implementation manner, the processing unit is further configured to adjust, based on the torque deviation value, a torque compensation value of the motor when the engine operates at a target engine torque.

[0027] In one possible embodiment, the above-mentioned determination unit is also used to determine that there is no deviation in the torque accuracy of the engine when it runs at the target engine torque when the speed difference is less than a second preset speed, the second preset speed is less than the first preset speed, and the target engine torque is the current signal torque of the engine.

[0028] According to a third aspect of the present application, a torque accuracy verification device is provided, deployed on a vehicle. The torque accuracy verification device includes a memory and a processor, the memory and the processor being coupled; the memory is configured to store computer program code, which includes computer instructions; when the processor executes the computer instructions, the torque accuracy verification device performs the torque accuracy verification method provided in the first aspect and any possible implementation thereof.

[0029] According to the fourth aspect provided by the present application, a computer-readable storage medium is provided, in which instructions are stored. When the instructions are executed on a torque accuracy verification device, the torque accuracy verification device executes the torque accuracy verification method provided by the above-mentioned first aspect and any possible implementation method thereof.

[0030] According to the fifth aspect provided by the present application, a vehicle is provided, comprising the torque accuracy calibration device provided by the third aspect above.

[0031] According to the sixth aspect provided by the present application, a computer program product is provided, which includes computer instructions. When the computer instructions are run on a torque accuracy verification device, the torque accuracy verification device executes the torque accuracy verification method provided by the above-mentioned first aspect and any possible implementation method thereof.

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

[0033] (1) In the torque accuracy calibration method provided in the present application, when the vehicle is running in a steady-state condition, the engine and the motor simultaneously provide power to the vehicle, and the speed of the vehicle is related to the total torque provided by the engine and the motor. When other parameters remain unchanged, the magnitude of the engine torque and the motor torque are adjusted on the basis of not changing the total torque provided by the engine and the motor. By monitoring the speed change of the vehicle, when the speed difference between the second speed of the vehicle after adjustment and the first speed of the vehicle before adjustment is greater than the first preset speed, it can be determined that there is a deviation in the torque accuracy of the engine.

[0034] (2) This application can stop adjusting the torque of the engine and motor when it is determined that there is a deviation in the engine torque, thereby avoiding excessive changes in vehicle speed that affect the driver's riding experience.

[0035] (3) The present application can determine the specific torque deviation value of the engine when it is running at the target engine torque based on the control of the engine torque and the motor torque when it is determined that there is a deviation in the torque accuracy of the engine and the target engine torque is greater than the engine torque before adjustment.

[0036] (4) The present application can control the motor to compensate the engine torque based on the determined torque compensation value when the engine is running at the target engine torque again in the event that there is a deviation in the torque accuracy of the engine.

[0037] 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.

[0038] 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

[0039] Figure 1 is a structural schematic diagram of a torque accuracy calibration system according to an exemplary embodiment;

[0040] Figure 2 is a flow chart showing a method for verifying torque accuracy according to an exemplary embodiment;

[0041] Figure 3 is a flow chart showing another method for verifying torque accuracy according to an exemplary embodiment;

[0042] Figure 4 is a flow chart showing another method for verifying torque accuracy according to an exemplary embodiment;

[0043] Figure 5 is another torque accuracy calibration control diagram shown according to an exemplary embodiment;

[0044] Figure 6 is a flow chart showing another method for verifying torque accuracy according to an exemplary embodiment;

[0045] Figure 7 is a flow chart showing another method for verifying torque accuracy according to an exemplary embodiment;

[0046] Figure 8 is a block diagram of a torque accuracy calibration device according to an exemplary embodiment;

[0047] Figure 9 The figure is a block diagram of a torque accuracy calibration device according to an exemplary embodiment. DETAILED DESCRIPTION

[0048] The following will describe the embodiments of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand the other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for the purpose of illustrating the present application and are not intended to limit the scope of protection of the present application.

[0049] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. Therefore, the illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0050] In the description of the embodiments, unless otherwise specified, “ / ” means “or”. For example, A / B can mean A or B. “And / or” in this article is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, “at least one” and “a plurality of” refer to two or more. Words such as “first” and “second” do not limit the quantity and execution order, and words such as “first” and “second” do not necessarily limit them to be different.

[0051] In related art, engine torque accuracy generally includes two types: one is the deviation between the signal torque generated by the engine and the target torque, which is defined as torque response accuracy; the other is the deviation between the actual torque executed by the engine and the signal torque generated, which is defined as torque accuracy. The engine torque accuracy described in the embodiments of this application refers to torque accuracy.

[0052] The operation of the engine is affected by environmental factors and the characteristics of the hardware itself. When environmental factors change, or as the vehicle's hardware status changes with age, the accuracy of the torque generated by the engine will be affected. In the event of a discrepancy between the actual torque executed by the engine and the signaled torque, the vehicle's powertrain will not be able to accurately control the torque, which will have a significant impact on the driving experience of the entire vehicle. For example, under the same acceleration demand, when the actual torque is reduced, because the vehicle's powertrain cannot recognize the torque deviation at this time, the actual torque applied to the wheel end will be less than the required torque, and the acceleration of the entire vehicle will be significantly reduced, affecting the user's driving experience.

[0053] To address the above-mentioned issues, the present application proposes a torque accuracy verification method, device, equipment, and storage medium. The torque accuracy verification device obtains a first speed and a second speed of the vehicle. The first speed is the speed of the vehicle after it has been running in a steady-state state for a preset period of time. The second speed is the speed after adjusting the vehicle's motor torque and engine torque based on a first torque change rate. The total torque of the adjusted motor torque and the adjusted engine torque is the same as the total torque of the motor torque and the adjusted engine torque before the adjustment. Furthermore, the torque accuracy verification device determines the speed difference between the first speed and the second speed, where the speed difference is the absolute value of the difference between the first speed and the second speed; and if the speed difference is greater than the first preset speed, it is determined that there is a deviation in the engine's torque accuracy.

[0054] In this way, in the torque accuracy verification method provided by the present application, when the vehicle is running in a steady-state condition, the engine and the motor provide power to the vehicle at the same time, and the speed of the vehicle is related to the total torque provided by the engine and the motor. When other parameters remain unchanged, the size of the engine torque and the motor torque are adjusted on the basis of not changing the total torque provided by the engine and the motor. By monitoring the speed change of the vehicle, when the speed difference between the second speed of the vehicle after adjustment and the first speed of the vehicle before adjustment is greater than the first preset speed, it can be determined that there is a deviation in the torque accuracy of the engine.

[0055] Figure 1 A torque accuracy calibration system is shown. The torque accuracy calibration method provided in the embodiment of the present application can be applied to Figure 1 The torque accuracy verification system shown is used to verify whether there is a deviation in the torque accuracy of the vehicle's engine. Figure 1 As shown, the torque accuracy verification system 10 includes a torque accuracy verification device 11 , an engine 12 , a motor 13 , a power control device 14 and a vehicle speed sensor 15 .

[0056] Among them, the torque accuracy verification device 11 is connected to the power control device 14 and the vehicle speed sensor 15 respectively. In the above connection relationship, wired connection or wireless connection can be adopted, which is not limited in the embodiment of the present application.

[0057] It should be noted that the above-mentioned torque accuracy verification system 10, and the torque accuracy verification device 11, engine 12, motor 13, power control device 14 and vehicle speed sensor 15 included in the torque accuracy verification system 10 are all deployed in the same vehicle.

[0058] The engine 12 and the motor 13 are used to provide power for the vehicle, the power control device 14 is used to monitor the torque of the engine 12 and the motor 13, and the vehicle speed sensor 15 is used to monitor the speed of the vehicle.

[0059] The torque accuracy verification device 11 can be used to obtain the first speed of the vehicle from the vehicle speed sensor 15 after the vehicle has been running in a steady-state condition for a preset period of time; it can also be used to obtain the second speed of the vehicle from the vehicle speed sensor 15 after the power control device 14 adjusts the torque of the motor 13 and the torque of the engine 12 based on the energy management strategy.

[0060] The torque accuracy verification device 11 can also be used to calculate the speed difference between the first speed and the second speed.

[0061] The speed difference is the absolute value of the difference between the first speed and the second speed.

[0062] The torque accuracy verification device 11 can also be used to determine the magnitude relationship between the speed difference and the first preset speed, and determine that there is a deviation in the torque accuracy of the engine 12 when the speed difference is greater than the first preset speed.

[0063] Figure 2 The figure is a flow chart of a method for verifying torque accuracy according to some exemplary embodiments. In some embodiments, the method for verifying torque accuracy can be applied to the following: Figure 1 The torque accuracy verification device 11 in the torque accuracy verification system 10 is shown. In the following, the embodiment of the present application takes the torque accuracy verification method applied to the torque accuracy verification device 11 as an example to illustrate the torque accuracy verification method.

[0064] like Figure 2 As shown, the torque accuracy verification method provided in the embodiment of the present application includes the following S201-S203.

[0065] S201. The torque accuracy verification device obtains a first speed and a second speed of a vehicle.

[0066] Among them, the first speed is the speed of the vehicle after running in a steady-state condition for a preset period of time, and the second speed is the speed after adjusting the motor torque and engine torque of the vehicle based on the first torque change rate. The total torque of the adjusted motor torque and the adjusted engine torque is the same as the total torque of the motor torque and the engine torque before adjustment.

[0067] As one possible implementation, the torque accuracy verification device obtains the vehicle's operating status. After the vehicle has been operating in a steady-state state for a predetermined period of time, it obtains the vehicle's current speed from a vehicle speed sensor and determines the current speed as a first speed. Furthermore, the torque accuracy verification device sends a power adjustment message to a power control device, causing the power control device to adjust the motor torque and the engine torque based on the first torque conversion rate carried in the power adjustment message, while maintaining the total torque provided by the motor and engine. Furthermore, after the motor torque and the engine torque are adjusted, the torque accuracy verification device obtains a second vehicle speed from the vehicle speed sensor.

[0068] It should be noted that steady-state operating conditions include: the vehicle's accelerator pedal opening fluctuation is less than the preset opening fluctuation, the slope change rate of the road on which the vehicle is traveling is less than the preset slope change rate, the vehicle's speed fluctuation is less than the preset speed fluctuation, the engine's torque fluctuation is less than the preset torque fluctuation, and the motor's torque fluctuation is less than the preset torque fluctuation.

[0069] The embodiment of the present application does not impose any specific limitation on the specific values ​​of the accelerator pedal opening, road slope, speed, engine torque, and motor torque under the above conditions.

[0070] In some embodiments, the torque accuracy verification device obtains the second speed of the vehicle in real time during the continuous adjustment of the torque of the motor and the torque of the engine.

[0071] It should be noted that the preset duration, the first torque change rate, the preset opening fluctuation, the preset ramp change rate, the preset speed fluctuation and the preset torque fluctuation can be pre-set in the torque accuracy verification device by the operation and maintenance personnel of the torque accuracy verification system. For example, the preset duration can be 30 seconds, 1 minute, etc., the first torque change rate can be 2Nm / s (Newton-meters / second), 5Nm / s, etc., the preset opening fluctuation can be 1%, the preset ramp change rate can be 5° (degrees), the preset speed fluctuation can be 2kph (kilometers per hour), and the preset torque fluctuation can be 5Nm. The embodiments of the present application do not make specific limitations on this.

[0072] S202: The torque accuracy verification device determines a speed difference between the first speed and the second speed.

[0073] The speed difference is the absolute value of the difference between the first speed and the second speed.

[0074] As a possible implementation method, the torque accuracy verification device calculates the difference between the first speed and the second speed based on the first speed and the second speed obtained in the above step S201, and determines the absolute value of the calculated difference as the speed difference between the first speed and the second speed.

[0075] S203: The torque accuracy verification device determines that there is a deviation in the torque accuracy of the engine when the speed difference is greater than the first preset speed.

[0076] In some embodiments, the torque accuracy verification device determines that there is no deviation in the torque accuracy of the engine when the engine operates at the target engine torque when the speed difference is less than a second preset speed.

[0077] The second preset speed is less than the first preset speed, and the target engine torque is the current signal torque of the engine.

[0078] It should be noted that the first preset speed and the second preset speed can be set in advance in the torque accuracy calibration device by the operation and maintenance personnel of the torque accuracy calibration system, and the embodiment of the present application does not specifically limit this.

[0079] For example, to avoid excessive speed changes and driver complaints due to engine torque accuracy calibration, the first preset speed can be set to 5 kph. To determine whether the torque adjustment of the engine and motor affects the vehicle speed, the second preset speed can be set to 2 kph.

[0080] It is understood that after adjusting the torque of the engine and motor, if the speed difference between the second vehicle speed and the first speed is small, it indicates that the speed before and after the torque adjustment has not changed significantly. In other words, due to the same deviation in the engine torque accuracy, the total torque output by the engine and motor has not changed. However, if the speed difference is large, it indicates that the speed before and after the torque adjustment has changed significantly. In other words, due to the deviation in the engine torque accuracy, the total torque output by the engine and motor has changed.

[0081] In some embodiments, when the speed difference is greater than a first preset speed, the torque accuracy verification device controls the engine to operate at a target engine torque and controls the motor to operate at a target motor torque.

[0082] The target engine torque is the current signal torque of the engine, and the target motor torque is the current signal torque of the motor.

[0083] It can be understood that when the speed difference is greater than the first preset speed, it means that there is a deviation in the torque accuracy of the current engine. If the torque of the engine and the motor is still adjusted, the speed difference will further increase, making the driver obviously feel the abnormality and thus complain. Therefore, when it is determined that the speed difference is greater than the first preset speed, the torque adjustment of the engine and the motor is stopped, and the vehicle operates at the current target engine torque and target motor torque.

[0084] In one design, when the target engine torque is greater than the engine torque before adjustment, in order to determine the specific torque deviation value when the engine is running at the target engine torque, the torque accuracy verification method provided in the embodiment of the present application is as follows: Figure 3 As shown, it also includes S301-S303.

[0085] S301: The torque accuracy verification device obtains a third speed.

[0086] The third speed is a speed obtained by adjusting the torque of the motor based on the second torque change rate while the torque of the engine remains unchanged, and the adjusted motor torque is greater than the motor torque before adjustment.

[0087] As a possible implementation method, the torque accuracy verification device obtains the vehicle speed from the vehicle speed sensor in real time while the engine torque remains unchanged and adjusts the torque of the motor based on the second torque change rate, and determines the obtained speed as the third speed.

[0088] It should be noted that the second torque change rate can be set in advance in the torque accuracy verification device by the operation and maintenance personnel of the torque accuracy verification system, wherein the second torque change rate can be consistent with the first torque change rate recorded in the above embodiment or different, and the embodiment of the present application does not make specific limitations on this.

[0089] It can be understood that since the engine torque remains unchanged, the torque of the motor is adjusted based on the second torque change rate, and the adjusted motor torque is larger than the motor torque before adjustment, which increases the total torque provided by the engine and the motor, thereby increasing the power provided to the vehicle, that is, the speed of the vehicle increases.

[0090] S302 : The torque accuracy verification device determines the current motor torque of the motor when the third speed is equal to the first speed.

[0091] As one possible implementation, the torque accuracy verification device determines the magnitude relationship between the third speed, which is obtained in real time, and the first speed based on the third speed determined in step S301 and the first speed obtained in step S201. Furthermore, if the obtained third speed is equal to the first speed, the torque accuracy verification device determines the current motor torque of the motor and controls the motor to operate at the current motor torque.

[0092] It should be noted that the torque accuracy verification device determines the current motor torque of the motor. Specifically, when it is determined that the third speed is equal to the first speed, it sends a message to the power control device to stop adjusting the motor torque, so that the power control device stops adjusting the motor torque and sends the current motor torque of the motor to the torque accuracy verification device.

[0093] S303 : The torque accuracy verification device determines a torque deviation value when the engine is running at the target engine torque based on the current motor torque and the target motor torque.

[0094] As one possible implementation, the torque accuracy verification device calculates a torque difference between the current motor torque and the target motor torque based on the current motor torque determined in step S302 and the target motor torque determined in step S203. Furthermore, the torque accuracy verification device determines a torque deviation value when the engine is operating at the target engine torque based on the calculated torque difference.

[0095] In some embodiments, the torque accuracy verification device determines the torque deviation value of the engine when it runs at the target engine torque based on the torque difference. Specifically, the torque accuracy verification device directly determines the calculated torque difference as the torque deviation value of the engine when it runs at the target engine torque.

[0096] In order to ensure the accuracy of the determined torque deviation value, the torque accuracy verification device determines the torque deviation value when the engine is running at the target engine torque based on the torque difference value, which can also be:

[0097] The torque accuracy verification device repeatedly performs steps S201-S203 and S301-S302 to obtain multiple torque difference values. Further, the torque accuracy verification device determines the average value of the multiple torque difference values ​​as the torque deviation value when the engine is running at the target engine torque.

[0098] In some embodiments, after determining the torque deviation value when the engine is running at the target engine torque, the torque accuracy verification device adjusts the torque compensation value of the motor when the engine is running at the target engine torque based on the torque deviation value, so that when the vehicle's engine runs at the target engine torque again, the motor compensates for the torque that the engine cannot provide based on the torque compensation value.

[0099] It will be appreciated that in the torque accuracy verification method provided in the above-described embodiment of the present application, when the target engine torque is greater than the pre-adjusted engine torque, that is, when the total torque provided by the engine and motor is maintained constant, the engine torque is increased and the motor torque is decreased, resulting in a decrease in vehicle speed, and the actual engine torque is determined to be less than the engine signal torque. Furthermore, by controlling the engine to operate in a stable state and adjusting the motor torque until the speed reaches a first speed, the specific torque deviation between the actual torque and the signal torque when the engine is operating at the target engine torque is determined based on the difference in the motor torque change.

[0100] In one design, when the target engine torque is less than the engine torque before adjustment, in order to determine the specific torque deviation value when the engine is running at the target engine torque, the torque accuracy verification method provided in the embodiment of the present application is as follows: Figure 4 As shown, it also includes S401-S403.

[0101] S401: The torque accuracy verification device obtains a fourth speed.

[0102] The fourth speed is a speed obtained by adjusting the torque of the motor based on the third torque change rate while the torque of the engine remains unchanged, and the adjusted motor torque is less than the motor torque before the adjustment.

[0103] As a possible implementation method, the torque accuracy verification device obtains the vehicle speed from the vehicle speed sensor in real time while the engine torque remains unchanged and adjusts the torque of the motor based on the third torque change rate, and determines the obtained speed as the fourth speed.

[0104] It should be noted that the third torque change rate can be set in advance in the torque accuracy verification device by the operation and maintenance personnel of the torque accuracy verification system, wherein the second torque change rate can be consistent with any one of the first torque change rate and the second torque change rate recorded in the above embodiments, or can be different. The embodiments of the present application do not make specific limitations on this.

[0105] It can be understood that since the engine torque remains unchanged, the torque of the motor is adjusted based on the third torque change rate, and the adjusted motor torque is smaller than the motor torque before adjustment, resulting in a reduction in the total torque provided by the engine and the motor, and thus a reduction in the power provided to the vehicle, that is, the speed of the vehicle becomes smaller.

[0106] S402 : The torque accuracy verification device determines the current motor torque of the motor when the fourth speed is equal to the first speed.

[0107] It should be noted that the specific implementation method of this step can refer to the record in step S302 in the above embodiment of this application, and specifically replace the third speed with the fourth speed determined in the above step S401, which will not be repeated here.

[0108] S403 , the torque accuracy verification device determines a torque deviation value when the engine is running at the target engine torque based on the current motor torque and the target motor torque.

[0109] It should be noted that the specific implementation method of this step can refer to the record in step S303 in the above embodiment of this application, and will not be repeated here.

[0110] It will be appreciated that in the torque accuracy verification method provided in the above-described embodiment of the present application, when the target engine torque is less than the pre-adjustment engine torque, that is, when the total torque provided by the engine and motor remains unchanged, the engine torque is reduced and the motor torque is increased, resulting in an increase in vehicle speed, and the actual engine torque is determined to be less than the engine signal torque. Furthermore, by controlling the engine to operate in a stable state and adjusting the motor torque until the speed is reduced to a first speed, the specific torque deviation between the actual torque and the signal torque when the engine is operating at the target engine torque is determined based on the difference in the motor torque change.

[0111] In one design, in combination with the above embodiments of the present application, and the attached Figure 5 The torque accuracy calibration control diagram shown in FIG. 1 is a diagram showing a torque accuracy calibration method provided by an embodiment of the present application. Figure 6 As shown, it also includes S501-S506.

[0112] S501. The torque accuracy calibration device detects changes in the accelerator pedal opening, road slope, vehicle speed, engine required torque and actual torque, and motor required torque and actual torque.

[0113] For example, the indicators are as follows: Figure 5 As shown in point A.

[0114] S502: The torque accuracy verification device determines whether the vehicle is in a steady-state operating condition.

[0115] As a possible implementation method, the torque accuracy verification device determines that the vehicle is in a steady-state operating condition when the accelerator pedal opening change is within a preset pedal opening fluctuation range, the road slope change is within a preset slope range, the vehicle speed change is within a preset vehicle speed change range, the actual engine torque is equal to the required torque, and the actual motor torque is equal to the required torque; otherwise, it determines that the vehicle is not in a steady-state operating condition.

[0116] It should be noted that the torque accuracy verification device executes step S503 when it is determined that the vehicle is in a steady-state operating condition, and ends the torque accuracy verification process when it is determined that the vehicle is not in a steady-state operating condition.

[0117] For example, when it is determined that the vehicle is in a steady-state condition, various indicators such as Figure 5 As shown in point B.

[0118] S503: The torque accuracy verification device performs a torque accuracy verification process on the engine torque.

[0119] For example, the indicators are as follows: Figure 5 As shown in point C.

[0120] S504 : After executing the torque accuracy verification process three times, the torque accuracy verification device records the torque deviation value ΔTq each time.

[0121] For example, the indicators are as follows: Figure 5 As shown in point J.

[0122] S505: The torque accuracy verification device calculates and stores the average value Tq of the three torque deviation values ​​ΔTq offset , and store Tq offset .

[0123] S506, the torque accuracy calibration device will Tq offset The torque compensation value is determined as the torque compensation value of the electric motor when the engine is running at the target engine torque.

[0124] It should be noted that the specific implementation of the torque accuracy verification method recorded in the above steps S501-S506 can refer to the records in the above embodiments of this application and will not be repeated here.

[0125] In one design, the torque accuracy verification device in step S503 performs a torque accuracy verification process on the engine torque, such as Figure 7 As shown, it includes S601-S610.

[0126] S601. The torque accuracy calibration device synchronously reduces the motor required torque and increases the engine required torque at the same rate.

[0127] It should be noted that after the motor's required torque decreases, the power control device correspondingly controls the motor's actual torque to decrease, and after the engine's required torque increases, the power control device correspondingly controls the engine's actual torque to increase.

[0128] The torque accuracy verification device records the current stable speed V1 of the vehicle before adjusting the motor required torque and the engine required torque.

[0129] For example, the indicators are as follows: Figure 5 As shown in point C.

[0130] S602: The torque accuracy verification device monitors the speed drop of the vehicle.

[0131] For example, the indicators are as follows: Figure 5 As shown in point D.

[0132] S603: The torque accuracy verification device determines whether the vehicle's descending speed is greater than a first preset speed.

[0133] It should be noted that when the vehicle descends at a speed greater than the first preset speed, it indicates that there is a deviation in the torque accuracy of the engine.

[0134] If the torque accuracy verification device determines that the vehicle's descending speed is greater than the first preset speed, step S604 is executed. If it is determined that the vehicle's descending speed is less than the first preset speed within the preset time, the torque accuracy verification process is ended.

[0135] S604: The torque accuracy verification device controls the engine torque and the motor torque to remain unchanged.

[0136] For example, the indicators are as follows: Figure 5 As shown at point E.

[0137] S605: The torque accuracy verification device determines whether the vehicle is in a steady-state operating condition.

[0138] It should be noted that after the torque accuracy verification device stops adjusting the torque of the engine and the motor, it waits for the vehicle to return to a steady-state operating condition and then executes step S606 after determining that the vehicle is in a steady-state operating condition.

[0139] For example, the indicators are as follows: Figure 5 As shown at point F.

[0140] Furthermore, the torque accuracy verification device determines to stop adjusting the engine and motor torque and the speed V2 after the vehicle stabilizes.

[0141] S606: The torque accuracy verification device controls the engine required torque to remain unchanged and increases the motor required torque.

[0142] For example, the indicators are as follows: Figure 5 Shown at point G.

[0143] S607: The torque accuracy verification device monitors the speed increase of the vehicle.

[0144] S608 : After the speed V2 rises to the speed V1 , the torque accuracy verification device stops increasing the motor required torque and keeps the torque stable.

[0145] For example, the indicators are as follows: Figure 5 Shown at point H in the middle.

[0146] S609: After the speed of the vehicle stabilizes, the torque accuracy verification device records the torque change value of the motor.

[0147] For example, the indicators are as follows: Figure 5 As shown in point I.

[0148] S610: The torque accuracy verification device determines the torque change value of the motor as the torque deviation value of the engine.

[0149] It should be noted that the specific implementation of the torque accuracy verification method recorded in the above steps S601-S610 can refer to the records in the above embodiments of this application and will not be repeated here.

[0150] 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 accuracy calibration device or the torque accuracy calibration equipment includes hardware structures and / or software modules corresponding to the execution of each function. It should be easy for those skilled in the art to realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, 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 be beyond the scope of this application.

[0151] In the embodiment of the present application, the torque accuracy calibration device or the torque accuracy calibration equipment can be divided into functional modules according to the above method. For example, the torque accuracy calibration device or the torque accuracy calibration equipment can include various functional modules corresponding to the various functional divisions, or two or more functions can be integrated into one processing module. The above-mentioned 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 embodiment of the present application is schematic and is only a logical functional division. In actual implementation, there may be other division methods.

[0152] Figure 8 This is a schematic diagram of the structure of a torque accuracy verification device provided in an embodiment of the present application. The torque accuracy verification device is used to perform the above torque accuracy verification method. Figure 8 As shown, the torque accuracy verification device 70 includes an acquisition unit 701 and a determination unit 702 .

[0153] An acquisition unit 701 is used to obtain a first speed and a second speed of the vehicle, where the first speed is the speed of the vehicle after the vehicle has been running in a steady-state condition for a preset period of time, and the second speed is the speed after the motor torque and the engine torque of the vehicle are adjusted based on the first torque change rate, and the total torque of the adjusted motor torque and the adjusted engine torque is the same as the total torque of the motor torque and the engine torque before the adjustment.

[0154] The determining unit 702 is configured to determine a speed difference between the first speed and the second speed, where the speed difference is an absolute value of the difference between the first speed and the second speed.

[0155] The determining unit 702 is further configured to determine that there is a deviation in the torque accuracy of the engine when the speed difference is greater than a first preset speed.

[0156] Optionally, the torque accuracy verification device 70 further includes a processing unit 703 .

[0157] The processing unit 703 is used to control the engine to operate at a target engine torque and to control the motor to operate at a target motor torque; the target engine torque is the current signal torque of the engine, and the target motor torque is the current signal torque of the motor.

[0158] Optionally, the acquisition unit 701 is further used to acquire a third speed, where the third speed is the speed after the torque of the motor is adjusted based on the second torque change rate while the torque of the engine remains unchanged, and the adjusted motor torque is greater than the motor torque before adjustment.

[0159] The determination unit 702 is further configured to determine the current motor torque of the motor when the third speed is equal to the first speed; and determine a torque deviation value when the engine runs at the target engine torque based on the current motor torque and the target motor torque.

[0160] Optionally, the acquisition unit 701 is further used to acquire a fourth speed, where the fourth speed is the speed after the torque of the motor is adjusted based on the third torque change rate while the torque of the engine remains unchanged, and the adjusted motor torque is less than the motor torque before adjustment.

[0161] The determination unit 702 is further configured to determine the current motor torque of the motor when the fourth speed is equal to the first speed; and determine a torque deviation value when the engine runs at the target engine torque based on the current motor torque and the target motor torque.

[0162] Optionally, the determination unit 702 is specifically configured to determine a torque difference between the current motor torque and the target motor torque; and determine a torque deviation value when the engine is running at the target engine torque based on the torque difference.

[0163] Optionally, the processing unit 703 is further configured to adjust a torque compensation value of the motor when the engine operates at a target engine torque based on the torque deviation value.

[0164] Optionally, the above-mentioned determination unit 702 is also used to determine that there is no deviation in the torque accuracy of the engine when it runs at the target engine torque when the speed difference is less than a second preset speed, the second preset speed is less than the first preset speed, and the target engine torque is the current signal torque of the engine.

[0165] Figure 9 FIG. 1 is a block diagram of a torque accuracy calibration device according to an exemplary embodiment. Figure 9As shown, the torque accuracy calibration device 80 includes but is not limited to: a processor 801 and a memory 802 .

[0166] The memory 802 is used to store executable instructions of the processor 801. It is understandable that the processor 801 is configured to execute instructions to implement the torque accuracy calibration method in the above embodiment.

[0167] It should be noted that those skilled in the art can understand that Figure 9 The torque accuracy calibration device structure shown in the figure does not constitute a limitation on the torque accuracy calibration device. The torque accuracy calibration device may include a Figure 9 More or fewer components may be shown, or certain components may be combined, or the components may be arranged differently.

[0168] Processor 801 is the control center of the torque accuracy calibration device. It utilizes various interfaces and lines to connect the various components of the entire torque accuracy calibration device. By running or executing software programs and / or modules stored in memory 802 and accessing data stored in memory 802, it performs various functions of the torque accuracy calibration device and processes data, thereby providing overall monitoring of the torque accuracy calibration device. Processor 801 may include one or more processing units. Optionally, processor 801 may integrate an application processor and a modem processor, wherein the application processor primarily handles the operating system, user interface, and application programs, and the modem processor primarily handles wireless communications. It is understood that the modem processor may not be integrated into processor 801.

[0169] The memory 802 can be used to store software programs and various data. The memory 802 may primarily include a program storage area and a data storage area. The program storage area may store an operating system and application programs required by at least one functional module (such as a determination unit, a processing unit, etc.). Furthermore, the memory 802 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage device.

[0170] In an exemplary embodiment, a computer-readable storage medium including instructions is also provided, such as a memory 802 including instructions. The above instructions can be executed by the processor 801 of the torque accuracy verification device 80 to implement the torque accuracy verification method in the above embodiment.

[0171] In actual implementation, Figure 8 The functions of the acquisition unit 701, the determination unit 702 and the processing unit 703 can all be represented by Figure 9The processor 801 in the embodiment calls the computer program stored in the memory 802. The specific execution process can be referred to the description of the torque accuracy verification method in the above embodiment, which will not be repeated here.

[0172] 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.

[0173] In an exemplary embodiment, the present application also provides a vehicle including the above-mentioned torque accuracy calibration device.

[0174] In an exemplary embodiment, the present application also provides a computer program product comprising one or more instructions, which can be executed by the processor 801 of the torque accuracy verification device to complete the torque accuracy verification method in the above embodiment.

[0175] 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 torque accuracy verification device, the various processes of the above-mentioned torque accuracy verification method embodiment are implemented, and the same technical effect as the above-mentioned torque accuracy verification method can be achieved. To avoid repetition, they will not be repeated here.

[0176] 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 distributed and completed by different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete the full classification or partial functions described above.

[0177] In the several embodiments provided in this 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 merely schematic. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods, 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.

[0178] The units described as separate components may or may not be physically separate, 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 places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0179] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0180] 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 and includes several 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 the various embodiments of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks or optical disks.

[0181] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A torque accuracy calibration method, characterized in that: The method comprises: Obtaining a first speed and a second speed of the vehicle, wherein the first speed is a speed of the vehicle after the vehicle has been operating in a steady-state state for a predetermined period of time, and the second speed is a speed after adjusting a motor torque and an engine torque of the vehicle based on a first torque change rate, wherein a total torque of the adjusted motor torque and the adjusted engine torque is the same as a total torque of the motor torque and the adjusted engine torque before the adjustment; determining a speed difference between the first speed and the second speed, wherein the speed difference is an absolute value of a difference between the first speed and the second speed; When the speed difference is greater than a first preset speed, it is determined that there is a deviation in the torque accuracy of the engine.

2. The torque accuracy calibration method according to claim 1, characterized in that: When the speed difference is greater than the first preset speed, the method further includes: The engine is controlled to operate at a target engine torque, and the motor is controlled to operate at a target motor torque; the target engine torque is a current signal torque of the engine, and the target motor torque is a current signal torque of the motor.

3. The torque accuracy calibration method according to claim 2, characterized in that: When the target engine torque is greater than the engine torque before adjustment, the method further includes: Obtaining a third speed, where the third speed is a speed obtained by adjusting the torque of the motor based on the second torque change rate while the torque of the engine remains unchanged, and the adjusted motor torque is greater than the motor torque before the adjustment; determining a current motor torque of the motor when the third speed is equal to the first speed; A torque deviation value of the engine when operating at the target engine torque is determined according to the current motor torque and the target motor torque.

4. The torque accuracy calibration method according to claim 2, characterized in that: When the target engine torque is less than the engine torque before adjustment, the method further includes: Obtaining a fourth speed, where the fourth speed is a speed obtained by adjusting the torque of the motor based on the third torque change rate while the torque of the engine remains unchanged, and the adjusted motor torque is less than the motor torque before the adjustment; determining a current motor torque of the motor when the fourth speed is equal to the first speed; A torque deviation value of the engine when operating at the target engine torque is determined according to the current motor torque and the target motor torque.

5. The torque accuracy calibration method according to claim 3 or 4, characterized in that: The determining, based on the current motor torque and the target motor torque, a torque deviation value of the engine when operating at the target engine torque includes: determining a torque difference between the current motor torque and the target motor torque; The torque deviation value when the engine is operated at the target engine torque is determined based on the torque difference value.

6. The torque accuracy calibration method according to claim 3 or 4, characterized in that: The method further comprises: Based on the torque deviation value, a torque compensation value of the electric motor when the engine operates at the target engine torque is adjusted.

7. The torque accuracy calibration method according to claim 1, characterized in that: The method further comprises: When the speed difference is less than a second preset speed, it is determined that there is no deviation in the torque accuracy of the engine when it runs at a target engine torque, the second preset speed is less than the first preset speed, and the target engine torque is the current signal torque of the engine.

8. The torque accuracy calibration method according to claim 1, characterized in that: The steady-state operating conditions include: the accelerator pedal opening fluctuation of the vehicle is less than the preset opening fluctuation, the slope change rate of the road on which the vehicle is traveling is less than the preset slope change rate, the speed fluctuation of the vehicle is less than the preset speed fluctuation, the torque fluctuation of the engine is less than the preset torque fluctuation, and the torque fluctuation of the motor is less than the preset torque fluctuation.

9. A torque accuracy calibration device, characterized in that: It includes an acquisition unit and a determination unit; the acquiring unit being configured to acquire a first speed and a second speed of the vehicle, the first speed being a speed of the vehicle after the vehicle has been operating in a steady-state state for a preset period of time, the second speed being a speed after adjusting a motor torque and an engine torque of the vehicle based on a first torque change rate, the total torque of the adjusted motor torque and the adjusted engine torque being the same as the total torque of the motor torque and the engine torque before the adjustment; The determining unit is configured to determine a speed difference between the first speed and the second speed, wherein the speed difference is an absolute value of the difference between the first speed and the second speed; The determining unit is further configured to determine that there is a deviation in the torque accuracy of the engine when the speed difference is greater than a first preset speed.

10. A torque accuracy calibration device, characterized in that: Deployed in the vehicle, including memory and processor; The memory is coupled to the processor; The memory is used to store computer program code, wherein the computer program code includes computer instructions; When the processor executes the computer instructions, the torque accuracy verification device performs the torque accuracy verification method according to any one of claims 1 to 8.

11. A computer-readable storage medium storing instructions, characterized in that: When the instruction is executed on the torque accuracy verification device, the torque accuracy verification device is caused to execute the torque accuracy verification method according to any one of claims 1 to 8.

12. A vehicle, characterized in that: Comprising the torque accuracy calibration device as described in claim 10.

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