Torque filling method and device for hybrid vehicle
By acquiring and judging the operating status parameters of the engine, battery, and generator, and rationally allocating generator torque, the problem of low rationality in generator torque distribution in hybrid vehicles is solved, thereby improving the overall vehicle power and driving experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- DONGFENG MOTOR GRP
- Filing Date
- 2022-10-31
- Publication Date
- 2026-04-21
AI Technical Summary
When the engine's output torque response is delayed or limited, the torque distribution of the generator in a hybrid vehicle is less efficient, leading to an imbalance between the vehicle's driving power demand and the battery's state of charge.
By acquiring the fill torque enable parameters of the engine operating status, battery state of charge, and generator operating status, the fill torque and assist torque range of the generator are determined, and the generator torque is reasonably allocated to temporarily compensate for the insufficient actual output torque of the engine.
In hybrid vehicles, the proper distribution of generator torque enhances overall vehicle performance, improves the driving experience, and ensures a balanced state of battery charge.
Smart Images
Figure CN115571110B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of hybrid vehicle technology, and more particularly to a torque filling method and apparatus for hybrid vehicles. Background Technology
[0002] With increasing international emphasis on energy security and environmental protection, countries are imposing increasingly stringent requirements on vehicle emissions. Reducing dependence on energy and achieving energy conservation and emission reduction have become urgent issues that need to be addressed for the sustainable development of the world economy. Electric vehicles, such as hybrid vehicles and pure electric vehicles, have become the trend in the automotive industry today.
[0003] The powertrain of a hybrid electric vehicle (HEV) includes a drive motor, a generator, and an engine. These three power sources can combine to output torque at the wheels to drive the vehicle, depending on operating conditions. During rapid acceleration, HEVs may experience delays in the turbocharger's torque response, causing the engine's output torque to be insufficient to meet demand, or the engine's output torque may be limited at extremely high temperatures. Therefore, in existing solutions, to avoid delays or limitations in the engine's output torque response when rapid acceleration is required and the high-voltage battery has a high charge level, a generator is used to temporarily compensate for the insufficient engine torque to meet the HEV's torque demands.
[0004] However, in existing solutions, when the engine's output torque response is delayed or limited, hybrid vehicles suffer from a problem of low rationality in the distribution of generator torque between the vehicle's driving power demand and the battery's state of charge. Summary of the Invention
[0005] This application provides a torque filling method and apparatus for hybrid vehicles, which solves the technical problem in the prior art where the torque distribution of the generator is not reasonable between the vehicle's driving power demand and the battery's state of charge when the engine's output torque response is delayed or limited. It achieves the technical effects of controlling the generator to reasonably distribute torque between the vehicle's driving power demand and the battery's state of charge when the engine's output torque response is delayed or limited, thereby improving the vehicle's power performance and enhancing the driving experience.
[0006] In a first aspect, embodiments of the present invention provide a torque filling method for a hybrid vehicle, comprising:
[0007] During vehicle operation, when the actual torque of the vehicle's engine is less than the required torque, the fill torque enabling parameters of the vehicle's generator are obtained. The fill torque enabling parameters include the engine's operating state, the battery's state of charge, and the generator's operating state.
[0008] If the fill torque enabling parameter satisfies the fill torque enabling condition of the generator, then the fill torque and assist torque range of the generator are obtained.
[0009] After obtaining the fill torque and the assist torque range, if the fill torque is within the assist torque range, the fill torque is determined as the target torque of the generator, and the generator is controlled to output at the target torque.
[0010] Preferably, after obtaining the filling torque and the assist torque range, the method further includes:
[0011] If the filling torque is less than the minimum value of the assist torque range, then the preset torque of the generator is determined as the target torque, and the generator is controlled to output at the preset torque.
[0012] Preferably, after obtaining the filling torque and the assist torque range, the method further includes:
[0013] If the filling torque is greater than the maximum value of the assist torque range, then the maximum value of the assist torque range is taken as the target torque, and the generator is controlled to output torque at the maximum value of the assist torque range.
[0014] Preferably, if the fill torque enabling parameter satisfies the fill torque enabling condition of the generator, then obtaining the fill torque and assist torque range of the generator includes:
[0015] If the engine is in a stable operating state, the state of charge is not less than the state of charge threshold, and the generator is in a first preset operating state, then the fill torque and the assist torque range are obtained.
[0016] Preferably, after obtaining the fill torque enable parameters of the vehicle's generator, the method further includes:
[0017] If the engine is in an unstable operating state, or the state of charge is less than the state of charge threshold, or the generator is in a second preset operating state, then the engine is controlled to output the actual torque.
[0018] Preferably, obtaining the fill torque of the generator includes:
[0019] The filling torque is obtained based on the actual torque and the required torque.
[0020] Preferably, obtaining the assist torque range of the generator includes:
[0021] The range of assist torque is obtained based on the state of charge.
[0022] Based on the same inventive concept, in a second aspect, the present invention also provides a torque filling device for a hybrid vehicle, comprising:
[0023] The enable parameter acquisition module is used to acquire the fill torque enable parameter of the vehicle's generator when the actual torque of the vehicle's engine is less than the required torque during vehicle operation. The fill torque enable parameter includes the engine operating state, the battery state of charge, and the generator operating state.
[0024] A fill torque acquisition module is used to acquire the fill torque and assist torque range of the generator if the fill torque enabling parameter satisfies the fill torque enabling condition of the generator.
[0025] The filling module is used to determine the filling torque as the target torque of the generator if the filling torque is within the range of the assist torque after obtaining the filling torque and the assist torque range, and to control the generator to output at the target torque.
[0026] Based on the same inventive concept, in a third aspect, the present invention provides a hybrid vehicle, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of a torque filling method for the hybrid vehicle.
[0027] Based on the same inventive concept, in a fourth aspect, the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of a torque filling method for a hybrid vehicle.
[0028] One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
[0029] In this embodiment of the invention, during vehicle operation, when the actual torque of the vehicle's engine is less than the required torque, the fill torque enabling parameters of the vehicle's generator are obtained. These fill torque enabling parameters include the engine's operating state, the battery's state of charge, and the generator's operating state. Here, the condition of the engine's actual torque being less than the required torque is triggered when the vehicle is under rapid acceleration or when the engine's capacity is limited. Under this condition, the engine's operating state, state of charge, and generator operating state can trigger a short-term compensation of the insufficient actual output torque of the engine through the generator's torque.
[0030] Next, the generator's fill torque enabling parameters are determined. If the fill torque enabling parameters meet the generator's fill torque enabling conditions, the generator's fill torque and assist torque range are obtained. Here, by analyzing the engine's operating status, state of charge, and generator's operating status, it is determined that the generator can output torque to temporarily compensate for the engine's insufficient actual output torque, thus prompting the generator to fill the torque gap. This facilitates the subsequent determination of a reasonable generator output torque based on the generator's fill torque and assist torque range.
[0031] After obtaining the ranges for the fill torque and assist torque, if the fill torque falls within the assist torque range, the fill torque is determined as the target torque for the generator, and the generator is controlled to output at the target torque. This indicates that the generator's fill torque is reasonable, meeting both the power requirements of vehicle driving and balancing the limitations of the battery's state of charge. By using the fill torque as the target torque, the generator's torque is rationally allocated, improving the overall vehicle performance and enhancing the driving experience. Attached Figure Description
[0032] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference figures denote the same parts throughout the drawings. In the drawings:
[0033] Figure 1 A schematic flowchart of the torque filling method for a hybrid vehicle according to an embodiment of the present invention is shown.
[0034] Figure 2 This diagram illustrates another step flow of the torque filling method for a hybrid vehicle according to an embodiment of the present invention.
[0035] Figure 3 A schematic diagram of a torque filling device for a hybrid vehicle according to an embodiment of the present invention is shown. Detailed Implementation
[0036] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
[0037] Example 1
[0038] The first embodiment of the present invention provides a torque filling method for hybrid vehicles, such as... Figure 1 As shown, it includes:
[0039] S101, during vehicle operation, when the actual torque of the vehicle's engine is less than the required torque, the fill torque enabling parameters of the vehicle's generator are obtained. The fill torque enabling parameters include the engine's operating status, the battery's state of charge, and the generator's operating status.
[0040] S102, If the fill torque enabling parameter satisfies the fill torque enabling condition of the generator, then obtain the fill torque and assist torque range of the generator.
[0041] S103: After obtaining the range of fill torque and assist torque, if the fill torque is within the range of assist torque, the fill torque is determined as the target torque of the generator, and the generator is controlled to output at the target torque.
[0042] The vehicle in this embodiment is a hybrid vehicle. The power source of a hybrid vehicle includes a drive motor, a generator, and an engine. Below, in conjunction with... Figure 1 The following details the specific implementation steps of the torque filling method for hybrid vehicles provided in this embodiment:
[0043] First, step S101 is executed. During vehicle operation, when the actual torque of the vehicle's engine is less than the required torque, the fill torque enabling parameters of the vehicle's generator are obtained. The fill torque enabling parameters include the engine's operating status, the battery's state of charge, and the generator's operating status.
[0044] Specifically, during vehicle operation, the condition where the vehicle's engine's actual torque is less than the required torque occurs when the actual output torque (i.e., actual torque) corresponding to the engine's current operating conditions does not meet the vehicle's set required torque. For example, if the driver needs to accelerate rapidly, the turbocharger's torque response delay during this process may prevent the engine's actual output torque from meeting the demand in time, thus triggering the condition where the engine's actual torque is less than the required torque. Additionally, excessively high engine temperatures can also limit the engine's actual output torque, triggering the condition where the engine's actual torque is less than the required torque.
[0045] When the actual torque of the vehicle's engine is less than the required torque, the fill torque enabling parameters of the vehicle's generator are obtained. These fill torque enabling parameters are those that, under this condition, trigger the generator to temporarily compensate for the insufficient actual output torque of the engine. The fill torque enabling parameters include the engine's operating state, the battery's state of charge, and the generator's operating state, so that the generator can be triggered to fill the torque gap based on these conditions.
[0046] Next, step S102 is executed. If the fill torque enabling parameter meets the fill torque enabling condition of the generator, the fill torque and assist torque range of the generator are obtained.
[0047] Specifically, after obtaining the generator's fill torque enabling parameters, that is, after obtaining the engine's operating status, the battery's state of charge, and the generator's operating status, it is necessary to judge the fill torque enabling parameters to determine whether the generator's torque can temporarily compensate for the insufficient actual output torque of the engine.
[0048] If the fill torque enabling parameters meet the generator's fill torque enabling conditions—that is, if the engine is in a stable operating state, its state of charge (SOC) is not less than the SOC threshold, and the generator is in a first preset operating state—it means the generator can output torque to temporarily compensate for the insufficient actual output torque of the engine. In this case, the generator's fill torque and assist torque range are obtained to prompt the generator to perform torque fill. The fill torque is the torque output by the generator to compensate for the insufficient actual output torque of the engine. The assist torque range is the range of the engine's fill torque determined based on the deviation between the battery's SOC and the engine's actual and required torque.
[0049] In this embodiment, the fill torque enabling condition is that the engine is in a stable operating state and its state of charge (SOC) is not less than a SOC threshold, and the generator is in a first preset operating state. The SOC threshold for the battery is set according to actual needs, typically 35%.
[0050] A stable operating state refers to the state in which the engine operates steadily. For example, during the engine or vehicle startup process, the engine speed is driven to the target speed by the generator's starting torque, and fuel injection and ignition are performed to reach a stable idle speed. Therefore, during startup, the engine's operating state is unstable. When the engine is operating under a certain stable condition, its operating state is stable.
[0051] The first preset operating state is when the generator can output torque to temporarily compensate for the insufficient actual output torque of the engine. The second preset operating state is when the generator cannot output torque to temporarily compensate for the insufficient actual output torque of the engine. For example, during gear shifting, the generator's main function is speed regulation, and it cannot output torque to temporarily compensate for the insufficient actual output torque of the engine. In this case, the generator is in the second preset operating state during gear shifting. When the generator is not in speed regulation mode, it can output torque to temporarily compensate for the insufficient actual output torque of the engine. In this case, the generator is in the first preset operating state. The generator's operating state (whether it is the first or second preset operating state) is determined based on the structural characteristics, operating gears, and usage conditions of different transmissions. For example, in a certain transmission, in a certain gear, the vehicle is directly driven by the engine, the generator is locked, and it cannot output torque to temporarily compensate for the insufficient actual output torque of the engine. In this case, the generator's operating state is the second preset operating state. In a certain transmission, in certain gears, the vehicle operates in series or parallel mode, and the generator is not locked. In this case, the generator's operating state is the first preset operating state. When the generator malfunctions, the generator operates in the second preset operating state.
[0052] If the engine is in an unstable operating state, or the state of charge is less than the state of charge threshold, or the generator is in the second preset operating state, it means that the generator cannot output torque to compensate for the insufficient actual output torque of the engine. In this case, the engine is controlled to output torque only.
[0053] The process of obtaining the generator's fill torque involves first determining the engine's torque deviation value based on the actual torque and the required torque. Then, using the engine's torque deviation value, a pre-calibrated torque deviation-fill torque table is consulted to obtain the fill torque.
[0054] The process of obtaining the assist torque range involves determining the maximum and minimum torque that the generator can provide based on the battery's state of charge. Then, the assist torque range is derived from these maximum and minimum torques.
[0055] After obtaining the range of fill torque and assist torque, step S103 is executed. If the fill torque is within the range of assist torque, the fill torque is determined as the target torque of the generator, and the generator is controlled to output at the target torque.
[0056] Specifically, if the fill torque is within the assist torque range, it means the generator's fill torque is reasonable, meeting both the vehicle's power requirements and balancing the limitations of the battery's state of charge. In this case, the fill torque is used as the target torque, and the generator is controlled to output at that target torque to temporarily compensate for the engine's insufficient actual output torque. This also improves the overall vehicle performance and enhances the driving experience.
[0057] After obtaining the fill torque and assist torque ranges, if the fill torque is less than the minimum value of the assist torque range, it indicates that the generator's fill torque is unreasonable, and the battery's state of charge cannot meet the generator's torque fill requirements. In this case, the generator's preset torque is set as the target torque, and the generator is controlled to output at the preset torque. The preset torque is 0 Nm, but can be set according to actual needs. This prevents the battery's state of charge from dropping to a minimum, which could lead to over-discharge of the high-voltage battery and affect vehicle safety.
[0058] After obtaining the fill torque and assist torque ranges, if the fill torque is greater than the maximum value of the assist torque range, it indicates that the battery's state of charge is sufficient and the generator's fill torque is not limited. In this case, the maximum value of the assist torque range is taken as the target torque, and the generator is controlled to output torque at the maximum value of the assist torque range.
[0059] In addition, during the process of controlling the generator to output the target torque, the rate of increase or decrease of the generator's target torque will be limited to ensure the smoothness of the generator's output torque and improve the overall driving experience.
[0060] In this embodiment, a reasonable target torque for the generator is determined based on the range of fill torque and assist torque, and the generator is controlled to output at the target torque. Thus, by controlling the generator's target torque, when the engine's output torque response is delayed or limited, the hybrid vehicle can rationally allocate torque between the vehicle's driving power requirements and the battery's state of charge, thereby improving overall vehicle performance and enhancing the driving experience.
[0061] Below, in conjunction with Figure 2 To further explain the torque filling method for hybrid vehicles in this embodiment, see below. Figure 2As shown, firstly, during vehicle operation, when the actual torque of the vehicle's engine is less than the required torque, the fill torque enabling parameters, such as the engine operating state, state of charge, and generator operating state, are acquired. If the engine operating state is a stable operating state, the state of charge is not less than the state of charge threshold, and the generator operating state is a first preset operating state, it indicates that the generator can output torque to temporarily compensate for the insufficient actual output torque of the engine. Then, based on the battery's state of charge, the maximum and minimum torque that the generator can fill are obtained. Next, based on these maximum and minimum torques, the assist torque range is obtained, and based on the actual torque and the required torque, the generator's fill torque is obtained.
[0062] After obtaining the range of fill torque and assist torque, if the fill torque is within the range of assist torque, it means that the fill torque of the generator is reasonable, which can meet the power demand of vehicle driving and balance the limitation of battery state of charge. Then, the fill torque is taken as the target torque, and the generator is controlled to output at the target torque of the fill torque.
[0063] If the fill torque is less than the minimum value of the assist torque range, it means that the fill torque of the generator is unreasonable and the state of charge of the battery cannot meet the requirements of the generator to fill the torque. In this case, the preset torque of the generator is set as the target torque, that is, the target torque is 0 Nm, and the generator is controlled to output at the preset torque.
[0064] If the fill torque is greater than the maximum value of the assist torque range, it indicates that the battery is fully charged and the generator's fill torque is not limited. In this case, the maximum value of the assist torque range is used as the target torque, and the generator is controlled to output torque at the maximum value of the assist torque range.
[0065] Furthermore, in the process of controlling the generator to output the target torque, the target torque is achieved at an increasing or decreasing rate.
[0066] One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
[0067] In this embodiment, during vehicle operation, when the actual torque of the vehicle's engine is less than the required torque, the fill torque enabling parameters of the vehicle's generator are obtained. These fill torque enabling parameters include the engine's operating state, the battery's state of charge, and the generator's operating state. Here, the condition of the engine's actual torque being less than the required torque is triggered when the vehicle is under rapid acceleration or when the engine's capacity is limited. Under this condition, the engine's operating state, state of charge, and generator operating state can trigger a short-term compensation of the insufficient actual output torque of the engine through the generator's torque.
[0068] Next, the generator's fill torque enabling parameters are determined. If the fill torque enabling parameters meet the generator's fill torque enabling conditions, the generator's fill torque and assist torque range are obtained. Here, by analyzing the engine's operating status, state of charge, and generator's operating status, it is determined that the generator can output torque to temporarily compensate for the engine's insufficient actual output torque, thus prompting the generator to fill the torque gap. This facilitates the subsequent determination of a reasonable generator output torque based on the generator's fill torque and assist torque range.
[0069] After obtaining the ranges for the fill torque and assist torque, if the fill torque falls within the assist torque range, the fill torque is determined as the target torque for the generator, and the generator is controlled to output at the target torque. This indicates that the generator's fill torque is reasonable, meeting both the power requirements of vehicle driving and balancing the limitations of the battery's state of charge. By using the fill torque as the target torque, the generator's torque is rationally allocated, improving the overall vehicle performance and enhancing the driving experience.
[0070] Example 2
[0071] Based on the same inventive concept, the second embodiment of the present invention also provides a torque filling device for hybrid vehicles, such as... Figure 3 As shown, it includes:
[0072] The enable parameter acquisition module 201 is used to acquire the fill torque enable parameter of the vehicle's generator when the actual torque of the vehicle's engine is less than the required torque during vehicle operation. The fill torque enable parameter includes the engine operating state, the battery state of charge, and the generator operating state.
[0073] The fill torque acquisition module 202 is used to acquire the fill torque and assist torque range of the generator if the fill torque enabling parameter satisfies the fill torque enabling condition of the generator.
[0074] The filling module 203 is used to determine the filling torque as the target torque of the generator if the filling torque is within the range of the assist torque after obtaining the filling torque and the assist torque range, and to control the generator to output the target torque.
[0075] As an optional embodiment, the filling module 203, after obtaining the filling torque and the assist torque range, further includes:
[0076] If the filling torque is less than the minimum value of the assist torque range, then the preset torque of the generator is determined as the target torque, and the generator is controlled to output at the preset torque.
[0077] As an optional embodiment, the filling module 203, after obtaining the filling torque and the assist torque range, further includes:
[0078] If the filling torque is greater than the maximum value of the assist torque range, then the maximum value of the assist torque range is taken as the target torque, and the generator is controlled to output torque at the maximum value of the assist torque range.
[0079] As an optional embodiment, the fill torque acquisition module 202 is used to acquire the fill torque and assist torque range of the generator if the fill torque enabling parameter satisfies the fill torque enabling condition of the generator, including:
[0080] If the engine is in a stable operating state, the state of charge is not less than the state of charge threshold, and the generator is in a first preset operating state, then the fill torque and the assist torque range are obtained.
[0081] As an optional embodiment, the filling torque acquisition module 202 is used for:
[0082] If the engine is in an unstable operating state, or the state of charge is less than the state of charge threshold, or the generator is in a second preset operating state, then the engine is controlled to output the actual torque.
[0083] As an optional embodiment, the fill torque acquisition module 202, used for acquiring the fill torque of the generator, includes:
[0084] The filling torque is obtained based on the actual torque and the required torque.
[0085] As an optional embodiment, the torque acquisition module 202, used for acquiring the assist torque range of the generator, includes:
[0086] The range of assist torque is obtained based on the state of charge.
[0087] Since the torque filling device for hybrid vehicles described in this embodiment is the same device used to implement the torque filling method for hybrid vehicles in Embodiment 1 of this application, those skilled in the art can understand the specific implementation methods and various variations of the torque filling device for hybrid vehicles in this embodiment based on the torque filling method for hybrid vehicles described in Embodiment 1 of this application. Therefore, how the torque filling device for hybrid vehicles implements the method in Embodiment 1 of this application will not be described in detail here. Any device used by those skilled in the art to implement the torque filling method for hybrid vehicles in Embodiment 1 of this application falls within the scope of protection of this application.
[0088] Example 3
[0089] Based on the same inventive concept, the third embodiment of the present invention also provides a hybrid vehicle, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of any of the above-described methods for torque filling in a hybrid vehicle.
[0090] Example 4
[0091] Based on the same inventive concept, the fourth embodiment of the present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the methods of the torque filling method for hybrid vehicles described in the first embodiment above.
[0092] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
[0093] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.
[0094] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.
[0095] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.
[0096] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.
[0097] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.
Claims
1. A torque filling method for a hybrid vehicle, characterized in that, include: During vehicle operation, when the actual torque of the vehicle's engine is less than the required torque, the fill torque enabling parameters of the vehicle's generator are obtained. The fill torque enabling parameters include the engine's operating state, the battery's state of charge, and the generator's operating state. If the fill torque enabling parameter satisfies the fill torque enabling condition of the generator, then the fill torque and assist torque range of the generator are obtained. After obtaining the fill torque and the assist torque range, if the fill torque is within the assist torque range, then the fill torque is determined as the target torque of the generator, and the generator is controlled to output at the target torque; In the process of controlling the generator to output the target torque, the rate of increase or decrease of the target torque of the generator is limited. If the fill torque enabling parameter satisfies the fill torque enabling condition of the generator, then the fill torque and assist torque range of the generator are obtained, including: If the engine is in a stable operating state, the state of charge is not less than the state of charge threshold, and the generator is in a first preset operating state, then the fill torque and the assist torque range are obtained. After obtaining the fill torque enable parameters of the vehicle's generator, the process further includes: If the engine is in an unstable operating state, or the state of charge is less than the state of charge threshold, or the generator is in a second preset operating state, then the engine is controlled to output the actual torque.
2. The method as described in claim 1, characterized in that, After obtaining the filling torque and the assist torque range, the method further includes: If the filling torque is less than the minimum value of the assist torque range, then the preset torque of the generator is determined as the target torque, and the generator is controlled to output at the preset torque.
3. The method as described in claim 1, characterized in that, After obtaining the filling torque and the assist torque range, the method further includes: If the filling torque is greater than the maximum value of the assist torque range, then the maximum value of the assist torque range is taken as the target torque, and the generator is controlled to output torque at the maximum value of the assist torque range.
4. The method as described in claim 1, characterized in that, The step of obtaining the fill torque of the generator includes: The filling torque is obtained based on the actual torque and the required torque.
5. The method as described in claim 1, characterized in that, The process of obtaining the assist torque range of the generator includes: The range of assist torque is obtained based on the state of charge.
6. A torque filling device for a hybrid vehicle, characterized in that, include: The enable parameter acquisition module is used to acquire the fill torque enable parameter of the vehicle's generator when the actual torque of the vehicle's engine is less than the required torque during vehicle operation. The fill torque enable parameter includes the engine operating state, the battery state of charge, and the generator operating state. A fill torque acquisition module is used to acquire the fill torque and assist torque range of the generator if the fill torque enabling parameter satisfies the fill torque enabling condition of the generator. The filling module is used to determine the filling torque as the target torque of the generator if the filling torque is within the range of the assist torque after obtaining the filling torque and the assist torque range, and to control the generator to output at the target torque; and to limit the rate of increase or decrease of the target torque of the generator during the process of controlling the generator to output at the target torque. The fill torque acquisition module is used to: acquire the fill torque and the assist torque range if the engine is in a stable operating state, the state of charge is not less than the state of charge threshold, and the generator is in a first preset operating state; and control the engine to output the actual torque if the engine is in an unstable operating state, the state of charge is less than the state of charge threshold, or the generator is in a second preset operating state.
7. A hybrid vehicle, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the method as described in any one of claims 1-5.
8. A computer-readable storage medium storing a computer program thereon, characterized in that, When the program is executed by the processor, it implements the steps of the method as described in any one of claims 1-5.
Citation Information
Patent Citations
Engine torque compensation method and equipment, storage medium and device
CN111734541A