Torque distribution method, device and equipment for hybrid electric vehicle and storage medium

Abstract

The invention provides a hybrid electric vehicle torque distribution method, device and equipment and a storage medium, and relates to the field of hybrid power system control. The method comprises the steps that multiple pieces of engine alternative point information are determined from an engine efficiency curve, and multiple pieces of generator alternative point information and multiple pieces of driving motor alternative point information are determined according to driver demand torque and the multiple pieces of engine alternative point information; according to the equivalent factor and the multiple groups of alternative point information, determining respective equivalent power of the multiple groups of alternative point information; and according to one group of alternative point information with the minimum equivalent power in the equivalent powers of the multiple groups of alternative point information, target torques and target rotating speeds of the engine, the generator and the driving motor at the current moment are determined. According to the method, the optimal torque distribution scheme under the current working condition can be quickly determined, so that the energy consumption of the power source of the whole vehicle is instantaneously optimal, and the economical efficiency of the whole vehicle is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of hybrid power system control. Specifically, the present application relates to a torque distribution method, device, equipment, and storage medium for a hybrid vehicle. Background Art

[0002] A series-parallel hybrid power system includes three power sources: an engine, a generator, and a motor. Its main hybrid driving modes are series and parallel modes. To ensure that the power system can meet the driver's requirements and the system efficiency can reach the optimum, it is necessary to coordinate the output of appropriate target torques or speeds of these three power sources under different modes. The torque distribution methods of traditional hybrid vehicles cannot dynamically coordinate the output of appropriate target torques or speeds of the engine, generator, and drive motor under multiple working conditions, resulting in low overall system efficiency and inability to meet the requirements of hybrid vehicles for vehicle economy. Summary of the Invention

[0003] The embodiments of the present application aim to provide a torque distribution method, device, equipment, and storage medium for a hybrid vehicle, aiming to overcome or at least partially solve the above problems.

[0004] In a first aspect of the embodiments of the present application, a torque distribution method for a hybrid vehicle is provided. The method includes: Determining multiple engine alternative point information from an engine efficiency curve, where the engine efficiency curve represents the optimal engine efficiency for each combination of engine torque and engine speed; Determining multiple generator alternative point information and multiple drive motor alternative point information according to the driver demand torque and the multiple engine alternative point information; Determining the equivalent power of each group of alternative point information according to an equivalent factor and multiple groups of alternative point information, where a group of alternative point information includes: one engine alternative point information, one generator alternative point information corresponding to the engine alternative point information, and one drive motor alternative point information corresponding thereto; Determining the target torque and target speed of the engine, generator, and drive motor at the current moment according to the group of alternative point information with the minimum equivalent power among the equivalent powers of each group of alternative point information.

[0005] In an optional implementation manner, the multiple groups of alternative point information include: multiple groups of alternative point information in the series mode and multiple groups of alternative point information in the parallel mode; the method further includes: When the group of alternative point information with the minimum equivalent power among the equivalent powers of each group of alternative point information is a group of alternative point information in the series mode, determining that the torque distribution mode of the vehicle is the series mode; In the case where a set of alternative point information with the minimum equivalent power among the equivalent powers of each set of alternative point information is a set of alternative point information in the parallel mode, determine the torque distribution mode of the vehicle as the parallel mode.

[0006] In an alternative implementation, determining multiple engine alternative point information from the engine efficiency curve includes: Determine multiple engine alternative point information within the engine alternative point power range from the engine efficiency curve as multiple engine alternative point information in the series mode; Determine multiple engine alternative point information within the engine alternative point torque range from the engine efficiency curve as multiple engine alternative point information in the parallel mode.

[0007] In an alternative implementation, the method further includes: In the case where the rotational speed of an identified engine alternative point exceeds the engine alternative point speed range, adjust the rotational speed of the engine alternative point to within the engine alternative point speed range to obtain an engine alternative point information in the series mode; In the case where the torque of an identified engine alternative point exceeds the engine alternative point torque range, adjust the torque of the engine alternative point to within the engine alternative point torque range to obtain an engine alternative point information in the series mode.

[0008] In an alternative implementation, determining multiple generator alternative point information and multiple drive motor alternative point information according to the driver demand torque and multiple engine alternative point information includes: Calculate multiple engine alternative point information in the series mode according to multiple engine alternative point information in the series mode; Calculate multiple drive motor alternative point information in the series mode according to the driver demand torque and the speed ratio.

[0009] In an alternative implementation, determining multiple generator alternative point information and multiple drive motor alternative point information according to the driver demand torque and multiple engine alternative point information includes: Determine multiple drive motor alternative point torques in the parallel mode according to the driver demand torque and multiple engine alternative point torques in the parallel mode; Determine that the multiple generator alternative point torques in the parallel mode are zero.

[0010] In an alternative implementation, after determining the target torque and target rotational speed of the engine, generator, and drive motor at the current moment, the method further includes: Compare the target torque and target speed of each power source at the current moment with the target torque and target speed of the power source at the previous moment, where the power source is any one of an engine, a generator, and a drive motor; When the difference between the target torque of a power source at the current moment and the target torque of the power source at the previous moment is greater than the torque threshold, and / or the difference between the target speed of the power source at the current moment and the target speed of the power source at the previous moment is greater than the speed threshold, assign the target torque and target speed at the previous moment to the power source; When the difference between the target torque of a power source at the current moment and the target torque of the power source at the previous moment is not greater than the torque threshold, and the difference between the target speed of the power source at the current moment and the target speed of the power source at the previous moment is not greater than the speed threshold, assign the target torque and target speed at the current moment to the power source.

[0011] A second aspect of the embodiments of the present application provides a torque distribution device for a hybrid vehicle, and the device includes: A selection module, configured to determine multiple engine alternative point information from an engine efficiency curve, where the engine efficiency curve represents the optimal engine efficiency for each combination of engine torque and engine speed; A calculation module, configured to determine multiple generator alternative point information and multiple drive motor alternative point information according to the driver demand torque and the multiple engine alternative point information; An equivalent module, configured to determine the equivalent power of each group of alternative point information according to an equivalent factor and multiple groups of alternative point information, where a group of alternative point information includes: one engine alternative point information, one generator alternative point information corresponding to the engine alternative point information, and one drive motor alternative point information corresponding thereto; A determination module, configured to determine the target torque and target speed of the engine, the generator, and the drive motor at the current moment according to the group of alternative point information with the minimum equivalent power among the equivalent powers of each group of alternative point information.

[0012] A third aspect of the embodiments of the present application provides an electronic device, and the electronic device includes: a memory, a processor, and a computer program stored on the memory and executable on the processor, where when the computer program is executed by the processor, it implements the hybrid vehicle torque distribution method according to the first aspect of the present invention.

[0013] A fourth aspect of the embodiments of the present application provides a computer-readable storage medium, and a computer program is stored on the computer-readable storage medium, where when the computer program is executed by a processor, it implements the hybrid vehicle torque distribution method according to the first aspect of the present invention.

[0014] In the hybrid vehicle torque distribution method provided in this application, multiple engine alternative point information is determined from the engine efficiency curve. According to the driver's demand torque and the multiple engine alternative point information, multiple generator alternative point information and multiple drive motor alternative point information are determined; according to the equivalent factor and multiple sets of alternative point information, the equivalent power of each set of alternative point information is determined; according to the set of alternative point information with the smallest equivalent power among the equivalent powers of multiple sets of alternative point information, the target torque and target speed of the engine, generator, and drive motor at the current moment are determined. By selecting multiple alternative points from the engine efficiency curve and dynamically matching the alternative points of the generator and drive motor in combination with the driver's demand torque, it is ensured that the engine always operates in the high-efficiency range, thereby reducing fuel consumption; through the calculation of the equivalent power of multiple sets of alternative points, the optimal torque distribution scheme under the current working conditions can be quickly determined, making the energy consumption of the vehicle power source reach the instantaneous optimum and improving the vehicle economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of this application, the drawings required for the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 is a flowchart of the steps of the hybrid vehicle torque distribution method proposed in an embodiment of this application; Figure 2 is a flowchart of the steps of the equivalent power calculation of the hybrid vehicle torque distribution method proposed in an embodiment of this application; Figure 3 is a schematic diagram of a series-parallel hybrid system of the hybrid vehicle torque distribution method proposed in an embodiment of this application; Figure 4 is a schematic diagram of determining the engine alternative point information of the hybrid vehicle torque distribution method proposed in an embodiment of this application; Figure 5 is a schematic diagram of determining the generator and drive motor alternative point information of the hybrid vehicle torque distribution method proposed in an embodiment of this application; Figure 6 is a schematic diagram of anti-jump processing of the hybrid vehicle torque distribution method proposed in an embodiment of this application; Figure 7 is a schematic diagram of the structure of the hybrid vehicle torque distribution device proposed in an embodiment of this application; Figure 8 is a schematic diagram of an electronic device proposed in an embodiment of this application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Next, in conjunction with the accompanying drawings in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0018] In the drawings, sometimes for clarity, the sizes of the constituent elements, the thicknesses of the layers, or the regions may be exaggerated. Therefore, any implementation of the present disclosure is not necessarily limited to the dimensions shown in the figures, and the shapes and sizes of the components in the figures do not reflect the true proportions. In addition, the drawings schematically show ideal examples, and any implementation of the present disclosure is not limited to the shapes or values shown in the drawings.

[0019] Refer to Figure 1 , Figure 1 is a flowchart of the steps of a torque distribution method for a hybrid vehicle proposed in an embodiment of the present application. As Figure 1 shown, the method includes the following steps S11 to S14: Step S11: Determine a plurality of engine alternative point information from the engine efficiency curve, where the engine efficiency curve represents the optimal engine efficiency for each combination of engine torque and engine speed.

[0020] In this embodiment, the engine efficiency curve is obtained through engine bench tests. The engine efficiency curve refers to the connection line of the operating points with the lowest fuel consumption rate under different combinations of engine speed and torque, representing the optimal engine efficiency for each combination of engine torque and engine speed. On the engine efficiency curve, a plurality of engine alternative points are selected according to certain rules (such as uniform distribution, selection according to the efficiency gradient, etc.). The engine alternative point torque and engine alternative point speed corresponding to each point are the engine alternative point information of that point, so as to determine a plurality of engine alternative point information.

[0021] Step S12: Determine a plurality of generator alternative point information and a plurality of drive motor alternative point information according to the driver demand torque and the plurality of engine alternative point information.

[0022] In this embodiment, the driver demand torque can be calculated from the accelerator pedal, vehicle speed, etc., and represents the driving torque required by the whole vehicle. According to the driver demand torque and the plurality of engine alternative point information, combined with the mechanical connection relationship and energy transfer relationship of the vehicle power system, etc., the generator alternative point information and drive motor alternative point information corresponding to each engine alternative point information (engine alternative point torque and engine alternative point speed) can be determined.

[0023] Step S13: Determine the equivalent power of each group of alternative point information according to the equivalent factor and multiple groups of alternative point information. One group of alternative point information includes: one engine alternative point information, one generator alternative point information corresponding to the engine alternative point information, and one drive motor alternative point information corresponding thereto.

[0024] In this embodiment, as Figure 2 shown, calculate the equivalent factor according to the battery SOC. The battery SOC (State of Charge) is the state of charge of the battery, that is, the ratio of the remaining battery power to the full battery power. The equivalent factor is a coefficient used to equivalent the electrical energy consumption of the battery to fuel consumption. Calculate the equivalent factor according to the battery SOC through empirical formulas or fitting functions, dynamic calculation methods of battery charge and discharge efficiency, calculation methods based on fuzzy logic, etc. The equivalent factor will be dynamically adjusted according to the battery SOC, and the algorithm can respond to the change of battery power in real time. Calculate the equivalent power of each group of alternative point information according to the equivalent factor and multiple groups of alternative point information according to the following formula:

[0025]

[0026] Among them, is the equivalent power in the series mode; is the engine alternative point torque in the series mode; is the engine alternative point speed in the series mode; is the engine loss power; is the generator alternative point speed in the series mode; is the generator alternative point speed in the series mode; is the generator loss power; is the drive motor alternative point torque in the series mode; is the drive motor alternative point speed in the series mode; is the drive motor loss power. The engine loss power can be obtained from the engine bench test, the generator loss power can be obtained from the generator bench test, and the drive motor loss power can be obtained from the drive motor bench test.

[0027]

[0028]

[0029] Among them, is the equivalent power in the parallel mode; is the engine alternative point torque in the parallel mode; is the engine alternative point speed in parallel mode; is the generator alternative point torque in parallel mode; is the generator alternative point speed in parallel mode; is the drive motor alternative point torque in parallel mode; is the drive motor alternative point speed in parallel mode. In parallel mode, , , the values of are all target speeds converted from the vehicle speed. The target speed converted from the vehicle speed refers to converting the current vehicle driving speed (vehicle speed) into the theoretical speed of the engine, generator or drive motor through the transmission ratio relationship of the transmission system.

[0030] Step S14: Determine the target torque and target speed of the engine, generator, and drive motor at the current moment according to the set of alternative point information with the smallest equivalent power among the equivalent powers of the multiple sets of alternative point information.

[0031] In this embodiment, the equivalent powers of multiple sets of alternative point information are compared to obtain the set of alternative point information with the smallest equivalent power. According to the engine alternative point information, generator alternative point information, and drive motor alternative point information in this set of alternative point information, the target torque and target speed of the engine, generator, and drive motor at the current moment are determined.

[0032] In the hybrid vehicle torque distribution method provided by this application, multiple engine alternative point information is determined from the engine efficiency curve. According to the driver demand torque and multiple engine alternative point information, multiple generator alternative point information and multiple drive motor alternative point information are determined; according to the equivalent factor and multiple sets of alternative point information, the equivalent powers of multiple sets of alternative point information are determined; according to the set of alternative point information with the smallest equivalent power among the equivalent powers of multiple sets of alternative point information, the target torque and target speed of the engine, generator, and drive motor at the current moment are determined. By selecting multiple alternative points from the engine efficiency curve and dynamically matching the alternative points of the generator and drive motor in combination with the driver demand torque, it is ensured that the engine always operates in the efficient range, thereby reducing fuel consumption; through the equivalent factor and multiple sets of alternative point information for equivalent power calculation, the optimal torque distribution scheme under the current working conditions can be quickly determined, and the energy consumption of the vehicle power source can reach the instantaneous optimum while ensuring the stability of the vehicle power battery SOC, improving the vehicle economy.

[0033] Such as Figure 2As shown, the series-parallel hybrid system includes three power sources: an engine, a generator, and an electric motor. Its main hybrid drive modes mainly include two modes: series and parallel. Specifically, in the series mode, the engine does not directly participate in vehicle driving, but drives the generator to generate electricity. The electric energy is transmitted to the electric motor or the power battery through electrical connection, and finally the vehicle is driven by the electric motor. In the parallel mode, the engine and the electric motor can jointly or separately drive the vehicle through mechanical connection (such as a clutch, a gearbox). The energy generated by the engine operation can either generate electricity through the generator or directly participate in vehicle driving.

[0034] In one embodiment, the present application also provides a torque distribution method for a hybrid vehicle. In this method, the multiple sets of alternative point information include: multiple sets of alternative point information in the series mode, and multiple sets of alternative point information in the parallel mode. This method at least includes the following steps S21 to step S22: Step S21: When the set of alternative point information with the smallest equivalent power among the respective equivalent powers of the multiple sets of alternative point information is a set of alternative point information in the series mode, determine that the torque distribution mode of the vehicle is the series mode; Step S22: When the set of alternative point information with the smallest equivalent power among the respective equivalent powers of the multiple sets of alternative point information is a set of alternative point information in the parallel mode, determine that the torque distribution mode of the vehicle is the parallel mode.

[0035] In this embodiment, the multiple sets of alternative point information include: multiple sets of alternative point information in the series mode, and multiple sets of alternative point information in the parallel mode. For the set of alternative point information with the smallest equivalent power determined in step S14, when this set of alternative point information is a set of alternative point information in the series mode, select the torque distribution mode of the vehicle as the series mode; when this set of alternative point information is a set of alternative point information in the parallel mode, select the torque distribution mode (target series-parallel mode) of the vehicle as the parallel mode. According to the mode (series / parallel) to which the optimal alternative point belongs, automatically trigger the corresponding torque distribution mode, so that the vehicle can switch between the series mode and the parallel mode according to different driving conditions and power demands, thereby optimizing the performance and energy consumption of the vehicle.

[0036] In one embodiment, the present application also provides a torque distribution method for a hybrid vehicle. In this method, the "determining multiple engine alternative point information from the engine efficiency curve" in the above step S11 at least includes the following steps S31 to step S32: Step S31: Determine multiple engine alternative point information within the engine alternative point power range from the engine efficiency curve as multiple engine alternative point information in the series mode; Step S32: Determine multiple engine alternative point information within the engine alternative point torque range from the engine efficiency curve as the multiple engine alternative point information in the parallel mode.

[0037] In this embodiment, according to the physical boundaries of the engine and the generator (such as the maximum torque of the engine , the maximum speed of the engine , the maximum torque of the generator , the maximum speed of the generator ), the NVH (Noise, Vibration, Harshness) limit boundaries (such as , ), and the engine emission boundaries (such as ), etc., determine the ranges of the engine alternative point speed, torque, and power to ensure that the selected engine alternative point information is within the normal operating range of the engine and the generator, while meeting the vehicle NVH and control emission requirements.

[0038] As Figure 3 shown, in the series mode, the engine only drives the generator to generate electricity and does not directly participate in vehicle driving. The speed and torque of the engine can be selected. Therefore, the power range of the engine alternative points is mainly considered. Within the power range of the engine alternative points, select multiple (such as 5 - 10) engine alternative points from the engine efficiency curve to obtain multiple engine alternative point information in the series mode ( , ). In the parallel mode, the engine can directly drive the wheels, and its speed is directly determined by the vehicle speed. Therefore, the torque range of the engine alternative points is mainly considered. Within the torque range of the engine alternative points, select multiple (such as 5 - 10) engine alternative points from the engine efficiency curve to obtain multiple engine alternative point information in the series mode ( ).

[0039] In one implementation, the present application also provides a torque distribution method for a hybrid vehicle, which at least includes the following steps S33 to S34: Step S33: In the case where the speed of an engine alternative point determined exceeds the engine alternative point speed range, adjust the speed of the engine alternative point to within the engine alternative point speed range to obtain one engine alternative point information in the series mode; Step S34: In the case where the torque of an engine alternative point determined exceeds the engine alternative point torque range, adjust the torque of the engine alternative point to within the engine alternative point torque range to obtain one engine alternative point information in the series mode.

[0040] In this embodiment, asFigure 3 As shown, in the series mode, after determining multiple engine alternative point information within the engine alternative point power range from the engine efficiency curve, check whether the engine alternative point speed and engine alternative point torque among the multiple engine alternative point information exceed the engine alternative point speed range and engine alternative point torque range. If an engine alternative point speed exceeds the engine alternative point speed range, then along the constant power curve (Power = Speed × Torque, with power unchanged, speed and torque are inversely proportional, alternative point speed = alternative point power ÷ alternative point torque), adjust this engine alternative point speed to within the engine alternative point speed range. If an engine alternative point torque exceeds the engine alternative point torque range, then along the constant power curve (alternative point torque = alternative point power ÷ alternative point speed), adjust this engine alternative point torque to within the engine alternative point torque range. For example, for an engine alternative point with corresponding power, speed, and torque of 60kW, 5000rpm, and 120Nm respectively, and a speed range of 2000 - 4500rpm, since this alternative point speed exceeds the engine alternative point speed range, keep the power unchanged, reduce the speed, and correspondingly adjust the torque to obtain the adjusted engine alternative point information: 60kW, 4500rpm, 130Nm.

[0041] In one implementation, the present application also provides a torque distribution method for a hybrid vehicle. In this method, the step of "determining multiple generator alternative point information and multiple drive motor alternative point information according to the driver demand torque and multiple engine alternative point information" in the above step S22 at least includes the following steps S41 to S42: Step S41: Calculate multiple engine alternative point information in the series mode according to the multiple engine alternative point information in the series mode; Step S42: Calculate multiple drive motor alternative point information in the series mode according to the driver demand torque and the speed ratio.

[0042] In this embodiment, as Figure 4 shown, in the series mode, the engine is only used to drive the generator to generate electricity, and all its power is converted into electrical energy. The generator is mechanically connected to the engine, and the speed of the generator is the same as the engine speed ( ), and the torque generated by the generator during power generation is equal in magnitude and opposite in direction to the torque output by the engine ( ). Therefore, according to the multiple engine alternative point information in the series mode, multiple engine alternative point information in the series mode can be calculated ( , ). The drive motor is responsible for driving the vehicle, and the torque it outputs needs to meet the driver demand torque , speed ratio is the transmission ratio (fixed value) from the drive motor to the wheels, reflecting the proportional relationship between the drive motor torque and the wheel torque (driver demand torque): According to the driver demand torque and the gear ratio, multiple drive motor alternative point information in the series mode can be calculated ( ).

[0043] In one embodiment, the present application also provides a torque distribution method for a hybrid vehicle. In this method, the step of "determining multiple generator alternative point information and multiple drive motor alternative point information according to the driver demand torque and multiple engine alternative point information" in the above step S22 includes at least the following steps S43 to S44: Step S43: Determine multiple drive motor alternative point torques in the parallel mode according to the driver demand torque and multiple engine alternative point torques in the parallel mode; Step S44: Determine that the multiple generator alternative point torques in the parallel mode are zero.

[0044] In this embodiment, as Figure 4 shown, in the parallel mode, the engine and the drive motor can jointly drive the vehicle. The driver demand torque is jointly provided by the engine and the drive motor. According to the power distribution relationship, the drive motor torque: . Therefore, according to the driver demand torque and multiple engine alternative point torques in the parallel mode, multiple drive motor alternative point torques in the parallel mode can be calculated ( ). In the parallel mode, the engine directly participates in vehicle driving, while the generator does not participate in torque transmission during the driving process. Therefore, the generator rotation torque , that is, the multiple generator alternative point torques in the parallel mode are zero.

[0045] In one embodiment, the present application also provides a torque distribution method for a hybrid vehicle. In this method, after the step of "determining the target torque and target speed of the engine, generator, and drive motor at the current moment" in step S14, it includes at least the following steps S51 to S53: Step S51: Compare the target torque and target speed of each power source at the current moment with the target torque and target speed of the power source at the previous moment, where the power source is any one of the engine, generator, and drive motor; Step S52: When the difference between the target torque of a power source at the current moment and the target torque of the power source at the previous moment is greater than the torque threshold, and / or the difference between the target speed of the power source at the current moment and the target speed of the power source at the previous moment is greater than the speed threshold, assign the target torque and target speed at the previous moment to the power source; Step S53: When the difference between the target torque of a power source at the current moment and the target torque of the power source at the previous moment is not greater than the torque threshold, and the difference between the target speed of the power source at the current moment and the target speed of the power source at the previous moment is not greater than the speed threshold, assign the target torque and target speed at the current moment to the power source.

[0046] In this embodiment, as Figure 6 shown, after determining the target torque and target speed of the engine, generator, and drive motor at the current moment (optimization of alternative points), anti-jump processing is performed on the targets of each power source (engine, generator, and drive motor). If the torque difference between the target torque and speed of each power source at the current moment and the previous moment is greater than the torque threshold and / or the speed difference is greater than the speed threshold, the target value at the previous moment is maintained for output; otherwise, the target torque and target speed of each power source calculated at the current moment are output. Through anti-jump processing, large impacts and vibrations on the power system caused by sudden changes in target values are avoided, thereby improving the comfort and safety of vehicle driving.

[0047] Based on the same inventive concept, an embodiment of the present application provides a torque distribution device for a hybrid vehicle. Figure 7 is a schematic structural diagram of a torque distribution device for a hybrid vehicle provided by an embodiment of the present application. As Figure 7 shown, the device includes: A selection module, configured to determine multiple engine alternative point information from the engine efficiency curve, where the engine efficiency curve represents the optimal engine efficiency for each combination of engine torque and engine speed; A calculation module, configured to determine multiple generator alternative point information and multiple drive motor alternative point information according to the driver demand torque and the multiple engine alternative point information; An equivalence module, configured to determine the equivalent power of each group of alternative point information according to the equivalence factor and multiple groups of alternative point information, where a group of alternative point information includes: one engine alternative point information, one generator alternative point information corresponding to the engine alternative point information, and one drive motor alternative point information corresponding thereto; A determination module, configured to determine the target torque and target speed of the engine, the generator, and the drive motor at the current moment according to a set of alternative point information with the minimum equivalent power among the multiple sets of alternative point information.

[0048] In an alternative embodiment, the multiple sets of alternative point information include: multiple sets of alternative point information in the series mode, and multiple sets of alternative point information in the parallel mode. The device further includes: A mode determination unit, configured to determine that the torque distribution mode of the vehicle is the series mode when a set of alternative point information with the minimum equivalent power among the multiple sets of alternative point information is a set of alternative point information in the series mode; and determine that the torque distribution mode of the vehicle is the parallel mode when a set of alternative point information with the minimum equivalent power among the multiple sets of alternative point information is a set of alternative point information in the parallel mode.

[0049] In an alternative embodiment, the selection module is specifically configured to: Determine multiple engine alternative point information within the engine alternative point power range from the engine efficiency curve as multiple engine alternative point information in the series mode; Determine multiple engine alternative point information within the engine alternative point torque range from the engine efficiency curve as multiple engine alternative point information in the parallel mode.

[0050] In an alternative embodiment, the device further includes: An adjustment module, configured to, when a determined engine alternative point speed exceeds the engine alternative point speed range, adjust the engine alternative point speed to within the engine alternative point speed range to obtain an engine alternative point information in the series mode; and when a determined engine alternative point torque exceeds the engine alternative point torque range, adjust the engine alternative point torque to within the engine alternative point torque range to obtain an engine alternative point information in the series mode.

[0051] In an alternative embodiment, the calculation module is specifically configured to: Calculate multiple engine alternative point information in the series mode according to the multiple engine alternative point information in the series mode; Calculate multiple drive motor alternative point information in the series mode according to the driver demand torque and the speed ratio.

[0052] In an alternative embodiment, the calculation module is specifically configured to: Determine multiple drive motor alternative point torques in the parallel mode according to the driver demand torque and the multiple engine alternative point torques in the parallel mode. Determine that the torques of multiple generator alternative points in the parallel mode are zero.

[0053] In an alternative embodiment, the device further includes: A processing module, configured to compare the target torque and target speed of each power source at the current moment with the target torque and target speed of the power source at the previous moment, where the power source is any one of an engine, a generator, and a drive motor; When the difference between the target torque of a power source at the current moment and the target torque of the power source at the previous moment is greater than a torque threshold, and / or the difference between the target speed of the power source at the current moment and the target speed of the power source at the previous moment is greater than a speed threshold, assign the target torque and target speed at the previous moment to the power source; When the difference between the target torque of a power source at the current moment and the target torque of the power source at the previous moment is not greater than the torque threshold, and the difference between the target speed of the power source at the current moment and the target speed of the power source at the previous moment is not greater than the speed threshold, assign the target torque and target speed at the current moment to the power source.

[0054] Based on the same inventive concept, an embodiment of the present application provides an electronic device. Refer to Figure 8 , Figure 8 is a schematic diagram of an electronic device shown in an embodiment of the present application. As Figure 8 shown, the electronic device 100 includes: a memory 110 and a processor 120. The memory 110 is communicatively connected to the processor 120 through a bus. A computer program is stored in the memory 110, and the computer program can run on the processor 120 to implement the steps in the hybrid vehicle torque distribution method described in any one of the above embodiments of the present application.

[0055] Based on the same inventive concept, an embodiment of the present disclosure also provides a computer-readable storage medium. When the instructions in the computer-readable storage medium are executed by a processor of a computer device, the computer device can execute the steps in the hybrid vehicle torque distribution method described in any one of the above embodiments of the present application.

[0056] Based on the same inventive concept, an embodiment of the present disclosure also provides a computer program product, including a computer program. When the computer program is executed by a processor of a computer device, it can execute the steps in the hybrid vehicle torque distribution method described in any one of the above embodiments of the present application.

[0057] Each embodiment in this specification is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0058] Those skilled in the art should understand that the embodiments of the present application can be provided as methods, devices, or computer program products. Therefore, the embodiments of the present application can take the form of all-hardware embodiments, all-software embodiments, or embodiments combining software and hardware aspects. Moreover, the embodiments of the present application can take the form of a computer program product implemented 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.

[0059] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of methods, terminal devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal devices generate a device for realizing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0060] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured product including an instruction device, and the instruction device realizes the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0061] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device, so that a series of operation steps are executed on the computer or other programmable terminal device to generate a computer-implemented process. Therefore, the instructions executed on the computer or other programmable terminal device provide steps for realizing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0062] Although the preferred embodiments of the embodiments of the present application have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concepts. Therefore, the appended claims are intended to be construed as including the preferred embodiments as well as all changes and modifications that fall within the scope of the embodiments of the present application.

[0063] Finally, it should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising the said element.

[0064] The above has introduced in detail a torque distribution method, device, equipment and storage medium for a hybrid vehicle provided by the present application. Specific examples are used in this text to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A torque distribution method for a hybrid vehicle, characterized in that The method includes: Determining a plurality of engine alternative point information from an engine efficiency curve, where the engine efficiency curve characterizes the optimal engine efficiency at each combination of engine torque and engine speed; Determining a plurality of generator alternative point information and a plurality of drive motor alternative point information according to the driver demand torque and the plurality of engine alternative point information; Determining the equivalent power of each group of alternative point information according to the equivalent factor and multiple groups of alternative point information, where a group of alternative point information includes: one engine alternative point information, one generator alternative point information corresponding to the engine alternative point information, and one drive motor alternative point information corresponding thereto; Determining the target torque and target speed of the engine, generator, and drive motor at the current moment according to the group of alternative point information with the minimum equivalent power among the equivalent powers of the multiple groups of alternative point information.

2. The torque distribution method for a hybrid vehicle according to claim 1, wherein The multiple groups of alternative point information include: multiple groups of alternative point information in series mode and multiple groups of alternative point information in parallel mode; the method further includes: Determining that the torque distribution mode of the vehicle is in series mode when the group of alternative point information with the minimum equivalent power among the equivalent powers of the multiple groups of alternative point information is a group of alternative point information in series mode; Determining that the torque distribution mode of the vehicle is in parallel mode when the group of alternative point information with the minimum equivalent power among the equivalent powers of the multiple groups of alternative point information is a group of alternative point information in parallel mode.

3. The torque distribution method for a hybrid vehicle according to claim 1, characterized in that, The determining a plurality of engine alternative point information from an engine efficiency curve includes: Determining a plurality of engine alternative point information within the engine alternative point power range from the engine efficiency curve as the plurality of engine alternative point information in series mode; Determining a plurality of engine alternative point information within the engine alternative point torque range from the engine efficiency curve as the plurality of engine alternative point information in parallel mode.

4. The torque distribution method for a hybrid vehicle according to claim 3, characterized in that The method further includes: When the determined engine alternative point speed exceeds the engine alternative point speed range, adjusting the engine alternative point speed to within the engine alternative point speed range to obtain one engine alternative point information in series mode; When the determined engine alternative point torque exceeds the engine alternative point torque range, adjusting the engine alternative point torque to within the engine alternative point torque range to obtain one engine alternative point information in series mode.

5. The torque distribution method for a hybrid vehicle according to claim 1, characterized in that, The determining a plurality of generator alternative point information and a plurality of drive motor alternative point information according to the driver demand torque and a plurality of engine alternative point information includes: Calculating a plurality of engine alternative point information in series mode according to the plurality of engine alternative point information in series mode; Calculating a plurality of drive motor alternative point information in series mode according to the driver demand torque and the speed ratio.

6. The torque distribution method for a hybrid vehicle according to claim 1, characterized in that, The determining a plurality of generator alternative point information and a plurality of drive motor alternative point information according to the driver demand torque and a plurality of engine alternative point information includes: Determining a plurality of drive motor alternative point torques in parallel mode according to the driver demand torque and the plurality of engine alternative point torques in parallel mode; Determine that the torques of multiple generator alternative points in the parallel mode are zero.

7. The torque distribution method for a hybrid vehicle according to any one of claims 1-6, characterized in that After determining the target torques and target speeds of the engine, the generator, and the drive motor at the current moment respectively, the method further includes: Comparing the target torque and target speed of each power source at the current moment with the target torque and target speed of the power source at the previous moment, where the power source is any one of the engine, the generator, and the drive motor; When the difference between the target torque of a power source at the current moment and the target torque of the power source at the previous moment is greater than the torque threshold, and / or, the difference between the target speed of the power source at the current moment and the target speed of the power source at the previous moment is greater than the speed threshold, allocating the target torque and target speed of the power source at the previous moment to the power source; When the difference between the target torque of a power source at the current moment and the target torque of the power source at the previous moment is not greater than the torque threshold, and the difference between the target speed of the power source at the current moment and the target speed of the power source at the previous moment is not greater than the speed threshold, allocating the target torque and target speed of the power source at the current moment to the power source.

8. A torque distribution device for a hybrid vehicle, characterized in that, The device includes: A selection module for determining multiple engine alternative point information from the engine efficiency curve, where the engine efficiency curve represents the optimal engine efficiency for each combination of engine torque and engine speed; A calculation module for determining multiple generator alternative point information and multiple drive motor alternative point information according to the driver demand torque and the multiple engine alternative point information; An equivalent module for determining the equivalent power of each set of alternative point information according to the equivalent factor and multiple sets of alternative point information, where a set of alternative point information includes: one engine alternative point information, one generator alternative point information corresponding to the engine alternative point information, and one drive motor alternative point information corresponding thereto; A determination module for determining the target torques and target speeds of the engine, the generator, and the drive motor at the current moment according to the set of alternative point information with the minimum equivalent power among the equivalent powers of each set of alternative point information.

9. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the computer program is executed by the processor, it implements the hybrid vehicle torque distribution method according to any one of claims 1 to 7.

10. A computer-readable storage medium, on which a computer program is stored, characterized in that, When the computer program is executed by the processor, it implements the hybrid vehicle torque distribution method according to any one of claims 1 to 7.

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