Torque control method and device and vehicle

Abstract

The invention provides a torque control method and device and a vehicle, and the torque control method comprises the steps that under the condition that the vehicle is in an engine direct drive mode, a rotating speed lag value that the rotating speed of a generator lags behind the rotating speed of an engine is obtained; when the rotating speed lag value is larger than the preset rotating speed lag value, whether the vehicle meets the torque adjusting condition or not is judged; under the condition that the torque adjusting condition is met, the target torque of the generator is determined; and determining the output torque of the engine according to the target torque of the generator and the required torque of the whole vehicle. The output torque of the engine is determined through the target torque of the generator and the required torque of the whole vehicle, the front-end rotating speed fluctuation of the generator can be limited, then the rotating speed fluctuation of the engine is restrained, the rotating speed lag value is reduced, periodic tooth knocking sound in the idling process of the generator is avoided, and user experience is improved.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a torque control method, device and vehicle. Background Art

[0002] With the deepening of the energy crisis and the deterioration of the natural environment, new energy vehicles are receiving more and more attention from the society. In order to reduce fuel consumption, hybrid power transmission systems have introduced new energy hybrid methods. When a hybrid vehicle is in engine direct drive mode, the engine directly drives the vehicle without driving the generator to charge the high-voltage battery. At this time, the generator has no torque. When the engine is running and the generator has no torque, due to the tooth gap between the two, the lag in speed at the generator input shaft will cause periodic tooth knocking in the mechanical structure, reducing the user experience. Summary of the invention

[0003] The embodiments of the present application provide a torque control method, device and vehicle to solve the problem of how to reduce the knocking noise caused by the idling of the generator in the engine direct drive mode.

[0004] In a first aspect, an embodiment of the present application provides a torque control method, the method comprising:

[0005] When the vehicle is in an engine direct drive mode, obtaining a speed hysteresis value of a generator speed lagging behind an engine speed;

[0006] When the speed hysteresis value is greater than a preset speed hysteresis value, determining whether the vehicle meets a torque adjustment condition;

[0007] When the vehicle satisfies the torque regulation condition, determining the target torque of the generator;

[0008] The engine output torque is determined according to the generator target torque and the vehicle required torque.

[0009] In a second aspect, an embodiment of the present application further provides a torque control device, the device comprising:

[0010] A first acquisition module is used to acquire a speed hysteresis value of the generator speed lagging behind the engine speed when the vehicle is in an engine direct drive mode;

[0011] A judging module, configured to judge whether the vehicle satisfies a torque adjustment condition when the speed hysteresis value is greater than a preset speed hysteresis value;

[0012] A first determination module, configured to determine a target torque of a generator when the vehicle satisfies a torque adjustment condition;

[0013] The second determination module is used to determine the engine output torque according to the generator target torque and the vehicle required torque.

[0014] In a third aspect, an embodiment of the present application provides an electronic device, which includes a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the above-mentioned torque control method when executed by the processor.

[0015] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, and the computer program implements the above-mentioned torque control method when executed by a processor.

[0016] In a fifth aspect, an embodiment of the present application also provides a vehicle, comprising the above-mentioned torque control device.

[0017] The embodiments of the present application include at least the following technical effects:

[0018] The technical solution of the embodiment of the present application is to obtain the speed hysteresis value of the generator relative to the engine when the vehicle is in the engine direct drive mode, and when the speed hysteresis value is greater than the preset speed hysteresis value and the vehicle meets the torque regulation conditions, obtain the generator target torque and determine the engine output torque based on the generator target torque and the vehicle required torque. The engine output torque is determined by the generator target torque and the vehicle required torque, which can limit the speed fluctuation of the front end of the generator, thereby suppressing the engine speed fluctuation, reducing the speed hysteresis value, avoiding the periodic tooth knocking sound during the idling of the generator, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a hybrid architecture diagram applicable to the torque control method provided in the embodiment of the present application;

[0020] Figure 2 is a flow chart of a torque control method provided in an embodiment of the present application;

[0021] Figure 3 is a schematic structural diagram of a torque control device provided in an embodiment of the present application;

[0022] Figure 4 A block diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] It should be understood that the references to "one embodiment" or "an embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present application. Therefore, the references to "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0025] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the following processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0026] Before introducing the torque control method provided in the embodiment of the present application, the relevant technologies involved in the present application are first introduced.

[0027] Hybrid vehicles include multiple operating modes, namely pure electric mode, series mode, parallel mode, engine direct drive mode and energy recovery mode. Pure electric mode refers to the mode in which only the drive motor (TorqueMax, TM) drives the vehicle; series mode refers to the mode in which the engine drives the generator (Governor Motor, GM) to charge the high-voltage battery, and the drive motor drives the vehicle at the same time; engine direct drive mode refers to the mode in which the clutch is closed, the engine directly drives the vehicle, and the engine does not need to drive the generator to charge the high-voltage battery. At this time, the generator has no torque. In parallel mode, the engine and TM motor jointly drive the vehicle. In special cases, the GM motor also participates in the process of driving the vehicle. In pure electric mode, the engine does not start, so there is no tooth knocking sound; in series mode, the generator generates large torque and there is no tooth knocking sound; in engine direct drive mode, the hybrid architecture of the vehicle is as follows Figure 1In the case of the P1+P3 hybrid architecture shown, the integrated cooling engine (ICE) and the generator GM are directly connected. When the engine is directly driven, due to the gap between the two, the speed lag at the motor input shaft will cause mechanical structures (gears, splines) to knock abnormally, causing customers to complain. It should be noted that in the engine direct drive operation mode, the architecture that will cause knocking abnormally is not limited to the P1+P3 hybrid architecture mentioned above, but can also be the P2.5 hybrid architecture and the P3 hybrid architecture.

[0028] like Figure 2 As shown, an embodiment of the present application provides a torque control method, which is applied to a controller. The method includes:

[0029] Step 201, when the vehicle is in an engine direct drive mode, obtain a speed hysteresis value of the generator speed lagging behind the engine speed.

[0030] The torque control method provided in this embodiment is applied to a hybrid vehicle in an engine direct drive mode. After the vehicle is started, the controller can determine the current operating mode of the vehicle by obtaining the vehicle's driving parameters. The driving parameters here may include the vehicle's accelerator pedal opening, vehicle speed, drive motor output torque, generator torque, engine output torque, etc. When it is determined that the vehicle is in the engine direct drive mode, the speed hysteresis value of the generator speed lagging behind the engine speed is obtained. It should be noted that the direct drive mode here can be a mode corresponding to when the vehicle is driving, or it can be a mode corresponding to when the engine is idling, the vehicle's heater or air conditioner is turned on.

[0031] Specifically, obtaining the speed lag value of the generator speed lagging behind the engine speed includes: obtaining the generator speed and the engine speed; and determining the difference between the engine speed and the generator speed as the speed lag value. In the embodiment of the present application, the speed lag value of the generator speed after the engine speed can be obtained by calculating the difference between the engine speed and the generator speed.

[0032] Step 202: When the speed hysteresis value is greater than a preset speed hysteresis value, it is determined whether the vehicle meets a torque regulation condition.

[0033] After obtaining the speed hysteresis value, determine whether the speed hysteresis value is greater than the preset speed hysteresis value. When the speed hysteresis value is greater than the preset speed hysteresis value, it indicates that the speed fluctuation of the generator front end is large, and the gear collision produces abnormal noise, which affects the vehicle's noise, vibration and sound roughness (NVH) performance and reduces the user experience. At this time, in order to improve the user experience, it is necessary to further determine whether the vehicle meets the torque adjustment conditions.

[0034] Step 203, determining the target torque of the generator when the vehicle meets the torque regulation condition.

[0035] The controller determines the target torque of the generator when it is determined that the vehicle meets the torque regulation conditions.

[0036] Step 204: determining the engine output torque according to the generator target torque and the vehicle required torque.

[0037] After determining the generator target torque, obtain the vehicle speed, accelerator pedal opening, engine speed and engine torque to determine the vehicle's required torque, which is the initial torque corresponding to the engine. Then, determine the engine output torque based on the generator target torque and the vehicle's required torque. Specifically, the engine output torque is the sum of the generator target torque and the vehicle's required torque.

[0038] In an embodiment of the present application, a speed hysteresis value of the generator relative to the engine is obtained when the vehicle is in an engine direct drive mode. When the speed hysteresis value is greater than a preset speed hysteresis value and the vehicle meets the torque regulation conditions, the generator target torque is obtained and the engine output torque is determined based on the generator target torque and the vehicle required torque. By determining the engine output torque by the generator target torque and the vehicle required torque, the speed fluctuation of the front end of the generator can be limited, thereby suppressing the engine speed fluctuation, reducing the speed hysteresis value, avoiding the periodic tooth knocking sound during the idling of the generator, and improving the user experience.

[0039] In an optional embodiment of the present application, before determining the engine output torque according to the generator target torque and the vehicle required torque, the method further includes:

[0040] Obtaining the vehicle speed, accelerator pedal opening, engine speed and engine torque of the vehicle;

[0041] The vehicle required torque is determined according to the vehicle speed, the accelerator pedal opening, the engine speed and the engine torque.

[0042] Specifically, when it is determined that the vehicle has abnormal knocking noise based on the speed lag value of the generator speed lagging behind the engine speed, torque control is required, and the vehicle meets the torque regulation, it is necessary to obtain the initial output torque of the current engine, that is, the required torque of the whole vehicle. When obtaining the required torque of the whole vehicle, the required torque of the whole vehicle can be determined based on the vehicle speed, accelerator pedal opening, engine speed and engine torque.

[0043] The above-mentioned implementation scheme of the present application obtains the vehicle speed, accelerator pedal opening, engine speed and engine torque, and determines the vehicle required torque based on the vehicle speed, the accelerator pedal opening, the engine speed and the engine torque, so as to determine the initial output torque that the engine needs to provide without torque adjustment, and then when determining the generator target torque, the output torque of the engine can be determined based on the generator target torque and the vehicle required torque, so as to achieve the purpose of limiting the fluctuation of the generator front end speed.

[0044] In an optional embodiment of the present application, determining the target torque of the generator includes:

[0045] determining a first torque for suppressing a speed hysteresis of the generator based on the speed hysteresis value;

[0046] determining a second torque corresponding to when the generator charges a battery of the vehicle;

[0047] The generator target torque is determined according to the first torque and the second torque.

[0048] Specifically, when the vehicle meets the torque regulation conditions, it is necessary to determine the torque required by the generator for the load, that is, the generator target torque. First, the speed hysteresis value corresponding to the generator can be used to determine the first torque required to suppress the generator speed. Based on the formula torque (Nm) = generator power (W) ÷ 2π ÷ (generator speed (rpm) / 60), the required torque corresponding to the generator speed not lagging behind the engine speed, that is, when the generator speed is equal to the engine speed, can be calculated, and then the current generator torque is obtained. The first torque is equal to the sum of the current generator torque and the required torque. Specifically, the generator can be charged to the vehicle battery through the generator so that the generator has a load torque. At this time, it is also necessary to consider the current state of the battery and whether the generator is allowed to charge the battery with the charging power corresponding to the first torque. Therefore, it is necessary to determine the second torque corresponding to the generator charging the battery. Finally, according to the first torque and the second torque, the generator target torque is determined.

[0049] In the above implementation scheme of the present application, when determining the target torque of the generator, it is necessary to determine the first torque and the second torque, where the first torque is the torque required to suppress the speed lag of the generator, and the second torque is the maximum torque that the generator can currently bear. Then, based on the first torque and the second torque, the generator target torque corresponding to the generator is determined, which can prevent the situation where the generator target torque exceeds the maximum torque that the generator can currently bear.

[0050] In an optional embodiment of the present application, determining a second torque corresponding to when the generator charges the battery of the vehicle includes:

[0051] Obtaining the battery capacity of the battery;

[0052] Determining the charging power of the generator to charge the battery according to the battery capacity;

[0053] A second torque corresponding to when the generator charges the battery is determined according to the charging power.

[0054] Specifically, when determining the second torque corresponding to when the generator charges the battery of the vehicle, it is necessary to obtain the battery capacity of the battery, determine the charging power of the generator to charge the battery according to the battery capacity, and then determine the second torque corresponding to when the generator charges the battery according to the charging power. The second torque obtained in this way is the maximum torque that the battery can withstand when the generator is charging.

[0055] The above implementation scheme of the present application determines the charging power of the generator used to charge the battery through the battery capacity, and then determines the second torque corresponding to the time when the generator charges the battery, that is, the load torque corresponding to the generator. The second torque here is the maximum torque that the generator can currently bear. Therefore, the generator target torque corresponding to the generator can be determined in combination with the second torque to prevent the situation where the generator target torque exceeds the maximum torque that the generator can currently bear.

[0056] In an optional embodiment of the present application, determining a second torque corresponding to when the generator charges the battery of the vehicle includes:

[0057] obtaining a battery capacity of the battery, a generator power, and a generator temperature;

[0058] Determining the charging power of the generator to charge the battery according to the battery capacity, the generator power and the generator temperature;

[0059] A second torque corresponding to when the generator charges the battery is determined according to the charging power.

[0060] Specifically, considering that the generator temperature and engine power have a certain influence on the charging power, the generator temperature and engine power can also be obtained here, and then the charging power of the generator to charge the battery is determined based on the battery capacity, the generator temperature and the engine power, and the second torque corresponding to the generator charging the battery is determined according to the charging power. The second torque obtained in this way is the maximum torque corresponding to the generator charging that the battery can withstand.

[0061] The above implementation scheme of the present application determines the charging power of the generator used to charge the battery through the battery capacity, generator power and generator temperature, and then determines the second torque corresponding to the time when the generator charges the battery, that is, the load torque corresponding to the generator. The second torque here is the maximum torque that the generator can currently bear. Therefore, the generator target torque corresponding to the generator can be determined in combination with the second torque to prevent the situation where the generator target torque exceeds the maximum torque that the generator can currently bear.

[0062] In an optional embodiment of the present application, when the speed hysteresis value is greater than a preset speed hysteresis value, determining whether the vehicle meets the torque adjustment condition includes:

[0063] obtaining the battery power of the vehicle;

[0064] When the battery power is less than a preset power, it is determined that the vehicle meets the torque regulation condition.

[0065] Specifically, when it is determined that the speed hysteresis value is greater than the preset speed hysteresis value, the vehicle has knocking noises due to the speed difference. At this time, the output torque of the engine can be adjusted so that the engine drives the generator to charge the battery, so that the generator no longer idles, and the speed difference between the generator and the engine is shortened. Before adjusting the output torque of the engine, it is necessary to determine whether the vehicle meets the torque adjustment conditions. Since the generator load is increased by charging the battery, the battery power needs to be detected. When the battery power is less than the preset power, that is, when the generator is allowed to charge the battery, it is determined that the vehicle meets the torque adjustment conditions.

[0066] It should be noted that when judging whether the vehicle meets the torque adjustment conditions, it is also necessary to check whether the vehicle's on-board diagnostic system is activated, that is, to detect whether the vehicle has any faults. When the vehicle has no faults and can drive normally, the torque adjustment conditions are met.

[0067] The above implementation scheme of the present application detects the battery power to determine whether the battery can be charged by the generator. When the battery power is less than the preset power, it indicates that the battery can be charged. At this time, it can be determined that the vehicle meets the torque adjustment conditions. Therefore, when the vehicle meets the torque adjustment conditions, the output torque of the vehicle engine can be further adjusted, thereby suppressing the engine speed fluctuation, reducing the speed lag value, avoiding the periodic tooth knocking sound during the idling of the generator, and improving the user experience.

[0068] In an optional embodiment of the present application, before determining whether the vehicle meets the torque adjustment condition, the method further includes:

[0069] When the speed hysteresis value is greater than a preset speed hysteresis value, obtaining the vehicle speed and the engine output torque of the vehicle;

[0070] Determining a driving condition corresponding to the vehicle according to the vehicle speed and the engine output torque;

[0071] When the driving condition is a quiet driving condition, it is determined whether the vehicle meets a torque adjustment condition.

[0072] The embodiment of the present application can determine the driving condition of the vehicle, and then determine whether to further judge whether the vehicle meets the torque adjustment condition based on the driving condition. Specifically, when the driving condition is a quiet driving condition, the periodic tooth knocking sound generated by the idling of the generator will reduce the user experience under quiet driving conditions. At this time, it is necessary to further judge whether the vehicle meets the torque adjustment condition, and when the torque adjustment condition is met, the output torque of the engine is adjusted, thereby suppressing the engine speed fluctuation, reducing the speed lag value, avoiding the periodic tooth knocking sound during the idling of the generator, and improving the user experience. When the driving condition is an intense driving condition, the engine noise is relatively large, and the periodic tooth knocking sound generated by the idling of the generator can be ignored under intense driving conditions and will not affect the user. Therefore, the engine torque can be adjusted without adjustment, and there is no need to judge whether the vehicle meets the torque adjustment condition accordingly.

[0073] Specifically, by obtaining the vehicle speed and engine output torque of the vehicle, and then determining the driving condition of the vehicle according to the vehicle speed and engine output torque, optionally, a correspondence table between the vehicle speed, engine output torque and driving condition can be pre-set, and after obtaining the vehicle speed and engine output torque, the corresponding driving condition can be determined by looking up the table. For example, the driving condition corresponding to when the vehicle speed is greater than or equal to the preset vehicle speed threshold can be set as an intense driving condition, the driving condition corresponding to when the vehicle speed is less than the preset vehicle speed threshold and the engine output torque is greater than or equal to the preset torque threshold can be set as an intense driving condition, and the driving condition corresponding to when the vehicle speed is less than the preset vehicle speed threshold and the engine output torque is less than the preset torque threshold can be set as a quiet driving condition. The specific correspondence table can be determined by experience, and this application does not make specific limitations.

[0074] The above-mentioned implementation scheme of the present application obtains the driving condition of the vehicle, determines whether to further judge whether the vehicle meets the torque adjustment conditions according to the driving condition, and then determines whether to adjust the output torque of the engine. When the vehicle is in the engine direct drive mode and there is a speed difference between the generator and the engine, it can be determined whether to increase the load torque of the generator in combination with the driving condition of the vehicle, thereby determining whether to adjust the engine output torque based on the driver's experience. While improving the user experience, there is no need to adjust the engine output torque every time there is a speed difference between the generator and the engine.

[0075] The torque control method provided in the embodiment of the present application is introduced above. The torque control device provided in the embodiment of the present application will be introduced below with reference to the accompanying drawings.

[0076] like Figure 3 As shown, an embodiment of the present invention further provides a torque control device, the device comprising:

[0077] The first acquisition module 301 is used to acquire a speed hysteresis value of the generator speed lagging behind the engine speed when the vehicle is in the engine direct drive mode;

[0078] A judgment module 302, configured to judge whether the vehicle meets a torque adjustment condition when the speed hysteresis value is greater than a preset speed hysteresis value;

[0079] A first determination module 303, configured to determine a target torque of a generator when the vehicle satisfies a torque adjustment condition;

[0080] The second determination module 304 is used to determine the engine output torque according to the generator target torque and the vehicle required torque.

[0081] Optionally, the first acquisition module includes:

[0082] An acquisition submodule, used for acquiring the generator speed and the engine speed;

[0083] The first determining submodule is configured to determine a difference between the engine speed and the generator speed as the speed hysteresis value.

[0084] Optionally, the first determining module includes:

[0085] A second determination submodule, configured to determine, based on the speed hysteresis value, a first torque for suppressing the speed hysteresis of the generator;

[0086] A third determination submodule, configured to determine a second torque corresponding to when the generator charges the battery based on parameter information corresponding to the battery of the vehicle;

[0087] The fourth determination submodule is configured to determine the generator target torque according to the first torque and the second torque.

[0088] Optionally, the judgment module includes:

[0089] A second determination submodule, used to obtain the battery power of the vehicle;

[0090] The fifth determination submodule is used to determine that the vehicle meets the torque adjustment condition when the battery power is less than a preset power.

[0091] Optionally, the device further comprises:

[0092] a second acquisition module, configured to acquire the vehicle speed and the engine output torque of the vehicle when the speed hysteresis value is greater than a preset speed hysteresis value;

[0093] A third determination module, configured to determine a driving condition corresponding to the vehicle according to the vehicle speed and the engine output torque;

[0094] The judgment module is further used to judge whether the vehicle meets the torque adjustment condition when the driving condition is a quiet driving condition.

[0095] Optionally, the third determining submodule includes:

[0096] A first acquisition unit, used to acquire the battery capacity of the battery;

[0097] A first determining unit, configured to determine a charging power for charging the battery by the generator according to the battery capacity;

[0098] The second determining unit is used to determine, according to the charging power, a second torque corresponding to when the generator charges the battery.

[0099] Optionally, the third determining submodule includes:

[0100] A second acquisition unit, used to acquire the battery capacity, generator power and generator temperature of the battery;

[0101] a third determining unit, configured to determine a charging power for charging the battery by the generator according to the battery capacity, the generator power and the generator temperature;

[0102] The fourth determining unit is used to determine, according to the charging power, a second torque corresponding to when the generator charges the battery.

[0103] Optionally, the device further comprises:

[0104] A third acquisition module is used to acquire the vehicle speed, accelerator pedal opening, engine speed and engine torque of the vehicle;

[0105] The fourth determination module is used to determine the vehicle required torque according to the vehicle speed, the accelerator pedal opening, the engine speed and the engine torque.

[0106] The torque control device provided in the present application obtains the speed hysteresis value of the generator relative to the engine when the vehicle is in the engine direct drive mode, and when the speed hysteresis value is greater than the preset speed hysteresis value and the vehicle meets the torque adjustment conditions, obtains the generator target torque and determines the engine output torque based on the generator target torque and the vehicle required torque. The engine output torque is determined by the generator target torque and the vehicle required torque, which can limit the speed fluctuation of the generator front end, thereby suppressing the engine speed fluctuation, reducing the speed hysteresis value, avoiding the periodic tooth knocking sound during the idling of the generator, and improving the user experience.

[0107] An embodiment of the present application also provides an electronic device, including: a processor, a memory, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, the various processes of the above-mentioned torque control method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0108] For example, Figure 4 A schematic diagram of the physical structure of an electronic device is shown.

[0109] like Figure 4 As shown, the electronic device may include: a processor 410, a communication interface 420, a memory 430 and a communication bus 440, wherein the processor 410, the communication interface 420 and the memory 430 communicate with each other through the communication bus 440. The processor 410 may call the logic instructions in the memory 430, and the processor 410 is used to perform the following steps: when the vehicle is in the engine direct drive mode, obtain the speed hysteresis value of the generator speed lagging behind the engine speed; when the speed hysteresis value is greater than the preset speed hysteresis value, determine whether the vehicle meets the torque adjustment condition; when the vehicle meets the torque adjustment condition, determine the generator target torque; and determine the engine output torque according to the generator target torque and the vehicle required torque.

[0110] In addition, the logic instructions in the above-mentioned memory 430 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art, and the computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk.

[0111] An embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the various processes of the above-mentioned torque control method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0112] An embodiment of the present application also provides a vehicle, including each process of the above-mentioned torque control device embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0113] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0114] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0115] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

[0116] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed in the embodiments of the present invention can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software 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 the present invention.

[0117] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0118] In the 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 the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, 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.

[0119] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0120] In addition, each functional unit in each embodiment of the present invention 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.

[0121] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical disks.

[0122] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A torque control method, characterized in that: The method comprises: When the vehicle is in an engine direct drive mode, obtaining a speed hysteresis value of a generator speed lagging behind an engine speed; When the speed hysteresis value is greater than a preset speed hysteresis value, determining whether the vehicle meets a torque adjustment condition; When the vehicle satisfies the torque regulation condition, determining the target torque of the generator; The engine output torque is determined according to the generator target torque and the vehicle required torque.

2. The torque control method according to claim 1, characterized in that: Get the speed lag value of the generator speed lagging behind the engine speed, including: Acquiring the generator speed and the engine speed; A difference between the engine speed and the generator speed is determined as the speed hysteresis value.

3. The torque control method according to claim 1, characterized in that: The step of determining the target torque of the generator includes: determining a first torque for suppressing a speed hysteresis of the generator based on the speed hysteresis value; determining a second torque corresponding to when the generator charges a battery of the vehicle; The generator target torque is determined according to the first torque and the second torque.

4. The torque control method according to claim 1, characterized in that: When the speed hysteresis value is greater than a preset speed hysteresis value, determining whether the vehicle meets the torque adjustment condition includes: obtaining the battery power of the vehicle; When the battery power is less than a preset power, it is determined that the vehicle meets the torque regulation condition.

5. The torque control method according to claim 4, characterized in that: Before determining whether the vehicle meets the torque adjustment condition, the method further includes: When the speed hysteresis value is greater than a preset speed hysteresis value, obtaining the vehicle speed and the engine output torque of the vehicle; Determining a driving condition corresponding to the vehicle according to the vehicle speed and the engine output torque; When the driving condition is a quiet driving condition, it is determined whether the vehicle meets a torque adjustment condition.

6. The torque control method according to claim 3, characterized in that: Determining a second torque corresponding to when the generator charges a battery of the vehicle includes: Obtaining the battery capacity of the battery; Determining the charging power of the generator to charge the battery according to the battery capacity; A second torque corresponding to when the generator charges the battery is determined according to the charging power.

7. The torque control method according to claim 3, characterized in that: Determining a second torque corresponding to when the generator charges a battery of the vehicle includes: obtaining a battery capacity of the battery, a generator power, and a generator temperature; Determining the charging power of the generator to charge the battery according to the battery capacity, the generator power and the generator temperature; A second torque corresponding to when the generator charges the battery is determined according to the charging power.

8. The torque control method according to claim 1, characterized in that: Before determining the engine output torque according to the generator target torque and the vehicle required torque, the method further includes: Obtaining the vehicle speed, accelerator pedal opening, engine speed and engine torque of the vehicle; The vehicle required torque is determined according to the vehicle speed, the accelerator pedal opening, the engine speed and the engine torque.

9. A torque control device, characterized in that: include: A first acquisition module is used to acquire a speed hysteresis value of the generator speed lagging behind the engine speed when the vehicle is in an engine direct drive mode; A judging module, configured to judge whether the vehicle satisfies a torque adjustment condition when the speed hysteresis value is greater than a preset speed hysteresis value; A first determination module, configured to determine a target torque of a generator when the vehicle satisfies a torque adjustment condition; The second determination module is used to determine the engine output torque according to the generator target torque and the vehicle required torque.

10. A vehicle, characterized in that: Comprising the torque control device as claimed in claim 9.

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