A vehicle power split control method, device, medium and product

Abstract

This invention discloses a method, device, medium, and product for automobile power split control, relating to the field of hybrid electric vehicle (HEV) control technology. The method includes: calculating the sun gear split power; when the sun gear split power is negative, calculating the engine speed to be adjusted based on the sun gear target speed, gear speed, and planetary gear set characteristic values, and calculating the actual engine target speed based on the engine's economic speed range, the number of speed segments, and the engine speed to be adjusted; when the actual engine target speed is less than the generator's upper limit speed, calculating the sun gear speed regulation torque based on the generator's required power, the actual engine target speed, and planetary gear set characteristic values; otherwise, calculating the sun gear speed regulation torque based on the engine's economic speed range, the generator's required power, and the planetary gear set characteristic values. The technical solution of this invention can balance planetary gear set cost and transmission efficiency in the overall control of hybrid electric vehicles.

Description

Technical Field

[0001] This invention relates to the field of hybrid electric vehicle control technology, and in particular to a method, device, medium, and product for controlling vehicle power splitting. Background Technology

[0002] Currently, in the overall control of hybrid vehicles, the main approach is to use a hybrid planetary hybrid system. By controlling the first and second planetary gear sets, two-speed ratio switching is achieved. This method can increase the utilization rate of the engine's high-efficiency range and reduce the size of the generator, but it requires two sets of planetary gear sets, resulting in higher costs. Alternatively, torque can be distributed to at least two motors to drive the vehicle. The overall power distribution ratio is calculated discretely, and then the torque distribution of the multi-motor hybrid system is achieved based on the power battery power. Although this solves the torque distribution problem, it cannot effectively improve the transmission efficiency of a single planetary gear set vehicle system without a clutch lock-up structure. Summary of the Invention

[0003] This invention provides a method, device, medium, and product for automobile power split control, in order to solve the problem that existing hybrid vehicle control cannot simultaneously consider the cost of planetary gear sets and transmission efficiency.

[0004] According to one aspect of the present invention, a method for controlling power split in an automobile is provided, comprising: Based on the preset economic curve of the car engine and the interpolation algorithm, the target engine speed and target engine torque are determined. Calculate the sun gear shunt power based on the engine target speed, gear speed, planetary gear set characteristic value, and engine target torque; When the power of the sun gear is negative, the engine speed to be adjusted is calculated based on the target speed of the sun gear, the gear speed and the characteristic value of the planetary gear set. The actual engine target speed is calculated based on the engine's economic speed range, the number of speed segments and the engine speed to be adjusted. When the actual target engine speed is less than the upper limit speed of the generator, the sun gear speed regulation torque is calculated based on the generator power demand, the actual target engine speed, and the planetary gear set characteristic value. When the actual target engine speed is greater than or equal to the upper limit speed of the generator, the sun gear speed regulation torque is calculated based on the engine's economic speed range, the generator's required power, and the planetary gear set characteristic value.

[0005] According to another aspect of the present invention, an automotive power split control device is provided, comprising: The basic data determination module is used to determine the target engine speed and target engine torque based on the preset economic curve of the car engine and the interpolation algorithm. The sun gear shunt power calculation module is used to calculate the sun gear shunt power based on the engine target speed, gear speed, planetary gear set characteristic value, and engine target torque. The actual engine target speed calculation module is used to calculate the engine speed to be adjusted based on the target speed of the sun gear, the gear speed and the planetary gear set characteristic value when the sun gear shunt power is negative, and to calculate the actual engine target speed based on the engine economic speed range, the number of speed segments and the engine speed to be adjusted. The first calculation module for the sun gear speed regulation torque is used to calculate the sun gear speed regulation torque based on the generator's required power, the actual engine target speed, and the planetary gear set characteristic values ​​when the actual engine target speed is less than the generator's upper limit speed. The second calculation module for sun gear speed regulation torque is used to calculate the sun gear speed regulation torque based on the engine's economic speed range, the generator's required power, and the planetary gear set characteristic values ​​when the actual engine target speed is greater than or equal to the generator's upper limit speed.

[0006] According to another aspect of the present invention, a vehicle-mounted device is provided, the vehicle-mounted device comprising: At least one processor; and a memory communicatively connected to said at least one processor; The memory stores a computer program that can be executed by the at least one processor, which is then executed by the at least one processor to enable the at least one processor to perform the vehicle power split control method according to any embodiment of the present invention.

[0007] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the automotive power split control method according to any embodiment of the present invention.

[0008] According to another aspect of the present invention, a computer program product is provided, the computer program product comprising a computer program that, when executed by a processor, implements the vehicle power split control method according to any embodiment of the present invention.

[0009] The technical solution of this invention determines the target engine speed and target engine torque based on a preset economic curve of the automobile engine and an interpolation algorithm. Then, based on the target engine speed, gear speed, planetary gear set characteristic value, and target engine torque, the sun gear shunt power is calculated. When the sun gear shunt power is negative, the engine speed to be adjusted is calculated based on the target sun gear speed, gear speed, and planetary gear set characteristic value. The actual target engine speed is calculated based on the engine's economic speed range, the number of speed segments, and the engine speed to be adjusted. Further, when the actual target engine speed is less than the generator's upper limit speed, the sun gear speed regulation torque is calculated based on the generator's required power, the actual target engine speed, and the planetary gear set characteristic value. When the actual target engine speed is greater than or equal to the generator's upper limit speed, the sun gear speed regulation torque is calculated based on the engine's economic speed range, the generator's required power, and the planetary gear set characteristic value. This solution is adapted for power shunt control of a single planetary gearbox in a vehicle transmission system without a locking mechanism. Specifically, when the shunt power of the sun gear is negative, the relationship between engine speed and vehicle speed is recoupled to make the shunt power of the sun gear positive or maintain a small shunt power, thereby improving the overall transmission efficiency of the system. This solves the problem that existing hybrid vehicle control cannot balance the cost of the planetary gearbox and transmission efficiency, and can balance the cost of the planetary gearbox and transmission efficiency in the overall control of hybrid vehicles.

[0010] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 A flowchart of a vehicle power split control method provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the structure of an automotive power split control device provided in Embodiment 3 of the present invention; Figure 3 A schematic diagram of the structure of an in-vehicle device that can be used to implement an embodiment of the present invention is shown. Detailed Implementation

[0013] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0014] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0015] Example 1 Figure 1 This is a flowchart of a vehicle power split control method provided in Embodiment 1 of the present invention. This embodiment is applicable to the power split control of a vehicle system with a single planetary gear set and no clutch lock-up structure. The method can be executed by a vehicle power split control device, which can be implemented in hardware and / or software and can be configured in an on-board unit. Figure 1 As shown, the method includes: Step 110: Determine the target engine speed and target engine torque based on the preset economic curve of the car engine and the interpolation algorithm.

[0016] The preset economic curve for the automotive engine can be a curve describing the relationship between engine speed and torque, pre-set on the vehicle controller. The target engine speed and target engine torque are obtained by interpolation based on the preset economic curve, respectively.

[0017] In this embodiment of the invention, since the preset economic curve of the automobile engine is a curve drawn based on a finite number of discrete operating points, but the actual vehicle operating conditions are continuously changing and will not fall exactly on the sampling points, the preset economic curve of the automobile engine can be interpolated based on the interpolation algorithm to obtain the target engine speed and the target engine torque.

[0018] Step 120: Calculate the sun gear shunt power based on the engine target speed, gear speed, planetary gear set characteristic value, and engine target torque.

[0019] Among them, the planetary gear set characteristic value can be an inherent structural parameter of a single-row planetary gear mechanism, which is the ratio of the number of teeth on the ring gear to the number of teeth on the sun gear. The sun gear split power can be the power component of the total mechanical power input to the planetary carrier from the engine, which is coupled to the sun gear branch through the planet gears.

[0020] In this embodiment of the invention, the sun gear speed and sun gear torque corresponding to the engine target speed are calculated based on the engine target speed, gear speed, planetary gear characteristic value and engine target torque, and the sun gear shunt power is calculated based on the aforementioned calculated sun gear speed and sun gear torque.

[0021] In an optional embodiment of the present invention, calculating the sun gear shunt power based on the engine target speed, gear speed, planetary gear set characteristic value, and engine target torque may include: calculating the theoretical speed of the sun gear based on the planetary gear set characteristic value, engine target speed, and gear speed; calculating the theoretical speed regulating torque of the sun gear based on the planetary gear set characteristic value and engine target torque; and dividing the product of the theoretical speed regulating torque of the sun gear and the theoretical speed of the sun gear by a fixed conversion factor to obtain the sun gear shunt power.

[0022] The theoretical speed of the sun gear can be the sun gear speed corresponding to the engine's target speed. The theoretical speed-regulating torque of the sun gear can be the sun gear torque corresponding to the engine's target torque. The fixed conversion factor can be 9550.

[0023] In this embodiment of the invention, the sum of the planetary gear set characteristic value and 1 is used as the target intermediate value. The product of the engine target speed and the target intermediate value is subtracted from the product of the gear speed and the planetary gear set characteristic value to obtain the theoretical speed of the sun gear. Then, the ratio of the engine target torque to the target intermediate value is used as the theoretical speed regulating torque of the sun gear. Finally, the product of the theoretical speed regulating torque of the sun gear and the theoretical speed of the sun gear is divided by a fixed conversion factor to obtain the sun gear shunt power.

[0024] In an optional embodiment of the present invention, after calculating the sun gear shunt power based on the engine target speed, gear speed, planetary gear set characteristic value and engine target torque, the method may further include: when the sun gear shunt power is positive, taking the engine target speed as the controlled object, calculating the first PID calculation torque based on the PID algorithm; and calculating the sun gear speed regulation torque based on the sun gear theoretical speed regulation torque and the first PID calculation torque.

[0025] In this context, PID stands for Proportional-Integral-Derivative (PID) control. The torque calculated by the first PID controller can be the torque calculated based on the PID algorithm, with the engine's target speed as the controlled object. The sun gear speed-regulating torque can be the final adjustment torque output to the sun gear.

[0026] Correspondingly, when the sun gear shunt power is positive, the target engine speed can be taken as the controlled object, and the first PID calculation torque can be calculated based on the PID algorithm. Then, the sum of the theoretical speed regulation torque of the sun gear and the first PID calculation torque can be used as the speed regulation torque of the sun gear.

[0027] Step 130: When the shunt power of the sun gear is negative, calculate the engine speed to be adjusted based on the target speed of the sun gear, the gear speed and the characteristic value of the planetary gear set, and calculate the actual engine target speed based on the engine economic speed range, the number of speed segments and the engine speed to be adjusted.

[0028] Here, the target speed of the sun gear can be the desired speed of the sun gear. The engine speed to be adjusted can be the engine speed that matches the target speed of the sun gear. The economic speed range of the engine can be the speed range defined by the upper limit speed and the lower limit speed of the engine. The number of speed segments can be the pre-set number of segments for the economic speed range of the engine. The actual target engine speed can be the calculated actual desired speed of the engine corresponding to the target engine speed.

[0029] In this embodiment of the invention, if the power shunt of the sun gear is negative, the product of the gear speed and the characteristic value of the planetary gear set is calculated. Based on the sum of the product and the target speed of the sun gear, as well as the characteristic value of the planetary gear set, the engine speed to be adjusted is calculated. Then, based on the economic speed range of the engine and the number of speed segments, the sub-interval step size is calculated. Based on the sub-interval step size, the engine speed to be adjusted, and the engine speed to be adjusted, the actual engine target speed is calculated.

[0030] In an optional embodiment of the present invention, calculating the engine speed to be adjusted based on the target speed of the sun gear, the gear speed, and the planetary gear set characteristic values ​​may include: calculating the engine speed to be adjusted based on the following formula: ;in, This indicates the engine speed to be adjusted. Represents the eigenvalues ​​of the planetary arrangement. Indicates the target rotational speed of the sun gear. This indicates the gear speed.

[0031] In an optional embodiment of the present invention, calculating the actual target engine speed based on the engine's economic speed range, the number of speed segments, and the engine speed to be adjusted may include: calculating the actual target engine speed based on the following formula: ; ;in, This indicates the upper limit of the engine's economic speed range. The lower limit of the engine speed within the engine's economic speed range; Indicates the number of speed segments; This represents the step size of the rotational speed segment, and rand is a random generation function; This indicates the actual target engine speed.

[0032] The speed segment step size can be the sub-interval step size after dividing the engine's economic speed range into intervals according to the number of speed segments.

[0033] Step 140: When the actual target engine speed is less than the upper limit speed of the generator, calculate the sun gear speed regulation torque based on the generator power demand, the actual target engine speed, and the planetary gear set characteristic value.

[0034] The upper limit speed of the generator can be the upper bound of the generator speed within the engine's economic speed range. The generator's required power can be the continuous active power output of the generator required when all loads on the power consumption side are running simultaneously.

[0035] In this embodiment of the invention, the actual target engine speed can be compared with the upper limit speed of the generator. If the actual target engine speed is less than the upper limit speed of the generator, the engine torque is calculated based on the actual target engine speed and the generator power requirement, and the sun gear speed regulation torque is calculated based on the engine torque and the planetary gear set characteristic value.

[0036] In an optional embodiment of the present invention, calculating the sun gear regulating torque based on the generator's required power, the actual target engine speed, the planetary gear set characteristic value, and the gear speed may include: calculating the sun gear regulating torque based on the following formula: ; ;in, This indicates the actual target engine speed. Represents the eigenvalues ​​of the planetary arrangement; This indicates the generator's power requirement; This indicates the regulating torque of the sun gear; Indicates the torque of the second PID controller; This indicates the feedforward speed regulation torque of the sun gear.

[0037] The second PID torque can be the torque calculated based on the PID algorithm, with the actual engine target speed as the controlled object when the actual engine target speed is less than the generator upper limit speed.

[0038] In this embodiment of the invention, when the actual target engine speed is less than the upper limit speed of the generator, it can be based on the formula Calculate the speed of the speed-regulating motor; where, Indicates the speed of the variable speed motor. Indicates the gear speed. This indicates the actual target engine speed. This represents the eigenvalues ​​of the planetary arrangement.

[0039] Step 150: When the actual target engine speed is greater than or equal to the upper limit speed of the generator, calculate the sun gear speed regulation torque based on the engine's economic speed range, the generator's required power, and the planetary gear set characteristic value.

[0040] In this embodiment of the invention, if the actual target engine speed is greater than or equal to the upper limit speed of the generator, the engine torque is calculated based on the upper limit speed of the engine in the economic speed range and the power required by the generator, and the sun gear speed regulation torque is calculated based on the engine torque and the planetary gear characteristic value.

[0041] In an optional embodiment of the present invention, calculating the sun gear regulating torque based on the engine's economic speed range, the generator's required power, the planetary gear set characteristic value, and the gear speed may include: ; ;in, The upper limit speed of the generator in the engine's economic speed range; This indicates the torque of the third PID controller.

[0042] The third PID torque can be the torque calculated based on the PID algorithm, with the actual engine target speed and the generator upper limit speed as the controlled object.

[0043] In this embodiment of the invention, when the actual target engine speed is greater than or equal to the generator's upper limit speed, it can be based on The calculation represents the speed of the speed-regulating motor. This indicates the gear speed.

[0044] The technical solution of this invention determines the target engine speed and target engine torque based on a preset economic curve of the automobile engine and an interpolation algorithm. Then, based on the target engine speed, gear speed, planetary gear set characteristic value, and target engine torque, the sun gear shunt power is calculated. When the sun gear shunt power is negative, the engine speed to be adjusted is calculated based on the target sun gear speed, gear speed, and planetary gear set characteristic value. The actual target engine speed is calculated based on the engine's economic speed range, the number of speed segments, and the engine speed to be adjusted. Further, when the actual target engine speed is less than the generator's upper limit speed, the sun gear speed regulation torque is calculated based on the generator's required power, the actual target engine speed, and the planetary gear set characteristic value. When the actual target engine speed is greater than or equal to the generator's upper limit speed, the sun gear speed regulation torque is calculated based on the engine's economic speed range, the generator's required power, and the planetary gear set characteristic value. This solution is adapted for power shunt control of a single planetary gearbox in a vehicle transmission system without a locking mechanism. Specifically, when the shunt power of the sun gear is negative, the relationship between engine speed and vehicle speed is recoupled to make the shunt power of the sun gear positive or maintain a small shunt power, thereby improving the overall transmission efficiency of the system. This solves the problem that existing hybrid vehicle control cannot balance the cost of the planetary gearbox and transmission efficiency, and can balance the cost of the planetary gearbox and transmission efficiency in the overall control of hybrid vehicles.

[0045] Example 2 Embodiment 2 of the present invention provides an optional embodiment of an automotive power split control method, the specific implementation of which can be found in the following embodiments. Technical terms that are the same as or corresponding to those in the above embodiments will not be repeated here.

[0046] The minimum power shunt control method for planetary series-parallel hybrid electric vehicles includes the following steps: 1) Calculate the shunt power of the sun gear: The engine power demand is calculated by interpolating the throttle opening and vehicle speed using the throttle characteristic map. ; The target engine speed is obtained by interpolation from the preset economic curve of the car engine. and engine target torque ; Gear speed is obtained from vehicle speed, and engine target speed is obtained from speed. The theoretical rotational speed of the sun gear was calculated. The theoretical rotational speed of the sun gear is calculated using the following formula. .

[0047] based on Calculate the theoretical speed-regulating torque of the sun gear ; Calculate the shunt power of the sun gear The calculation formula is: .

[0048] For example, suppose , , , , , By substituting into the relevant formula, we can obtain , ; .

[0049] 2) Determine the speed control mode: like If the value is positive, then the decoupled speed control mode is adopted; like If the value is negative, then the coupling speed regulation mode is adopted; Decoupled flow control mode: The controller sends the target torque of the engine to the engine. ; at the engine target speed For the controlled object, calculate the regulating torque of the sun gear using the following formula: ,in, The torque is calculated for the first PID controller.

[0050] For example, suppose , , ,but .

[0051] Coupled speed control mode: Target speed of the sun gear With gear speed The engine speed to be adjusted is calculated. The calculation formula is as follows: ;Based on the engine's economic speed range The actual target engine speed is calculated by dividing the engine speed into segments N. The calculation formula is as follows: ; .

[0052] For example, suppose , , , , ,but , .

[0053] If the actual engine target speed Less than The sun gear regulating torque is then calculated based on the following formula. and the speed of the speed-regulating motor , ; ; ;in, This is the second PID torque.

[0054] For example, let's continue with the above example. If , , .

[0055] If the actual engine target speed Greater than The actual engine target speed is then set to The sun gear regulating torque is calculated based on the following formula. and the speed of the speed-regulating motor ; ; ; .in, This is the third PID torque.

[0056] For example, let's continue with the above example. If , , .

[0057] Example 3 Figure 2 This is a schematic diagram of a vehicle power split control device provided in Embodiment 3 of the present invention. Figure 2 As shown, the device includes: The basic data determination module 310 is used to determine the target engine speed and target engine torque based on the preset economic curve of the automobile engine and the interpolation algorithm. The sun gear shunt power calculation module 320 is used to calculate the sun gear shunt power based on the engine target speed, gear speed, planetary gear set characteristic value and engine target torque; The actual engine target speed calculation module 330 is used to calculate the engine speed to be adjusted based on the target speed of the sun gear, the gear speed and the planetary gear set characteristic value when the sun gear shunt power is negative, and to calculate the actual engine target speed based on the engine economic speed range, the number of speed segments and the engine speed to be adjusted. The first calculation module 340 for the sun gear speed regulation torque is used to calculate the sun gear speed regulation torque based on the generator's required power, the actual engine target speed, and the planetary gear set characteristic values ​​when the actual engine target speed is less than the generator's upper limit speed. The second calculation module 350 for the sun gear speed regulation torque is used to calculate the sun gear speed regulation torque based on the engine's economic speed range, the generator's required power, and the planetary gear set characteristic values ​​when the actual engine target speed is greater than or equal to the generator's upper limit speed.

[0058] The technical solution of this invention determines the target engine speed and target engine torque based on a preset economic curve of the automobile engine and an interpolation algorithm. Then, based on the target engine speed, gear speed, planetary gear set characteristic value, and target engine torque, the sun gear shunt power is calculated. When the sun gear shunt power is negative, the engine speed to be adjusted is calculated based on the target sun gear speed, gear speed, and planetary gear set characteristic value. The actual target engine speed is calculated based on the engine's economic speed range, the number of speed segments, and the engine speed to be adjusted. Further, when the actual target engine speed is less than the generator's upper limit speed, the sun gear speed regulation torque is calculated based on the generator's required power, the actual target engine speed, and the planetary gear set characteristic value. When the actual target engine speed is greater than or equal to the generator's upper limit speed, the sun gear speed regulation torque is calculated based on the engine's economic speed range, the generator's required power, and the planetary gear set characteristic value. This solution is adapted for power shunt control of a single planetary gearbox in a vehicle transmission system without a locking mechanism. Specifically, when the shunt power of the sun gear is negative, the relationship between engine speed and vehicle speed is recoupled to make the shunt power of the sun gear positive or maintain a small shunt power, thereby improving the overall transmission efficiency of the system. This solves the problem that existing hybrid vehicle control cannot balance the cost of the planetary gearbox and transmission efficiency, and can balance the cost of the planetary gearbox and transmission efficiency in the overall control of hybrid vehicles.

[0059] Optionally, the vehicle power split control device includes a sun gear motor speed regulation torque calculation module, used to calculate a first PID calculation torque based on a proportional-integral-derivative PID algorithm when the sun gear split power is positive, with the engine target speed as the controlled object; and to calculate the sun gear speed regulation torque based on the engine target torque and the first PID calculation torque.

[0060] Optionally, the sun gear shunt power calculation module 320 is used to calculate the theoretical speed of the sun gear based on the planetary gear set characteristic value, the engine target speed, and the gear speed; calculate the theoretical speed regulating torque of the sun gear based on the planetary gear set characteristic value and the engine target torque; and divide the product of the theoretical speed regulating torque of the sun gear and the theoretical speed of the sun gear by a fixed conversion factor to obtain the sun gear shunt power.

[0061] Optionally, the actual engine target speed calculation module 330 includes an engine speed to be adjusted calculation unit, used to calculate the engine speed to be adjusted based on the following formula: ; wherein, the This indicates the engine speed to be adjusted. This represents the characteristic value of the planetary arrangement. Indicates the target rotational speed of the sun gear, the This indicates the rotational speed of the gear.

[0062] Optionally, the actual engine target speed calculation module 330 includes an actual engine target speed calculation unit, used to calculate the actual engine target speed based on the following formula: ; ;in, This indicates the upper limit of the engine speed within the engine's economic speed range. This indicates the lower limit speed of the engine within the engine's economic speed range; Indicates the number of speed segments; This represents the step size of the rotational speed segment, and rand is a random generation function; This indicates the actual target engine speed.

[0063] Optionally, the sun gear regulating torque first calculation module 340 is used to calculate the sun gear regulating torque based on the following formula: ; ;in, This indicates the actual target engine speed. This represents the characteristic value of the planetary arrangement. Indicates the rotational speed of the gear. Indicates the speed of the variable speed motor; This indicates the generator's power requirement; This indicates the regulating torque of the sun gear; Indicates the torque of the second PID controller; This indicates the feedforward speed regulation torque of the sun gear.

[0064] Optional, a second calculation module 350 for the sun gear speed regulation torque is used for... ; ;in, This indicates the upper limit speed of the generator within the engine's economic speed range; This indicates the torque of the third PID controller.

[0065] The vehicle power split control device provided in the embodiments of the present invention can execute the vehicle power split control method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the method.

[0066] Example 4 Figure 3 A schematic diagram of a vehicle-mounted device that can be used to implement embodiments of the present invention is shown. The components, their connections and relationships, and their functions shown herein are merely examples and are not intended to limit the implementation of the invention described and / or claimed herein.

[0067] like Figure 3As shown, the vehicle-mounted device 10 includes at least one processor 11 and a memory, such as ROM 12 or RAM 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded into the RAM 13 from the storage unit 18. The RAM 13 can also store various programs and data required for the operation of the vehicle-mounted device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An I / O interface 15 is also connected to the bus 14. The ROM 12 is a read-only memory, the RAM 13 is a random access memory, and the I / O interface 15 is an input / output interface.

[0068] Multiple components in the vehicle-mounted device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, optical disk, etc.; and a communication unit 19, such as a network card, modem, wireless transceiver, etc. The communication unit 19 allows the vehicle-mounted device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0069] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as automotive power split control methods.

[0070] In some embodiments, the vehicle power split control method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the vehicle device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the vehicle power split control method described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the vehicle power split control method by any other suitable means (e.g., by means of firmware).

[0071] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0072] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0073] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, RAM, ROM, erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0074] To provide interaction with the user, the systems and techniques described herein can be implemented in an in-vehicle device having: a display device for displaying information to the user (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor); and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the in-vehicle device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0075] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or middleware components (e.g., application servers), or frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0076] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS servers, such as high management difficulty and weak business scalability.

[0077] This application also discloses a computer program product, which includes a computer program that, when executed by a processor, implements the vehicle power split control method provided in any embodiment of this application. This program product shares the same inventive concept as the vehicle power split control method disclosed in the embodiments of this application, and therefore will not be described in detail here.

[0078] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0079] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for controlling the power split in an automobile, characterized in that, include: Based on the preset economic curve of the car engine and the interpolation algorithm, the target engine speed and target engine torque are determined. Calculate the sun gear shunt power based on the engine target speed, gear speed, planetary gear set characteristic value, and engine target torque; When the power shunt of the sun gear is negative, the engine speed to be adjusted is calculated based on the target speed of the sun gear, the gear speed and the characteristic value of the planetary gear set, and the actual engine target speed is calculated based on the engine economic speed range, the number of speed segments and the engine speed to be adjusted. When the actual target engine speed is less than the upper limit speed of the generator, the sun gear speed regulation torque is calculated based on the generator power demand, the actual target engine speed, and the planetary gear set characteristic value. When the actual target engine speed is greater than or equal to the upper limit speed of the generator, the sun gear speed regulation torque is calculated based on the engine's economic speed range, the generator's required power, and the planetary gear set characteristic value.

2. The method according to claim 1, characterized in that, Based on the engine target speed, gear speed, planetary gear set characteristic value, and engine target torque, the sun gear shunt power is calculated, including: The theoretical rotational speed of the sun gear is calculated based on the planetary gear characteristic values, the target rotational speed of the engine, and the gear rotational speed. Calculate the theoretical speed-regulating torque of the sun gear based on the planetary gear characteristic values ​​and the engine target torque; The product of the theoretical regulating torque of the sun gear and the theoretical rotational speed of the sun gear is divided by a fixed conversion factor to obtain the shunt power of the sun gear.

3. The method according to claim 2, characterized in that, After calculating the sun gear shunt power based on the engine target speed, gear speed, planetary gear set characteristic value, and engine target torque, the process further includes: When the power of the sun gear is positive, the target speed of the engine is taken as the controlled object, and the first PID calculation torque is calculated based on the proportional-integral-derivative PID algorithm. The sun gear speed regulation torque is calculated based on the theoretical speed regulation torque of the sun gear and the torque calculated by the first PID controller.

4. The method according to claim 1, characterized in that, Based on the target rotational speed of the sun gear, the rotational speed of the gears, and the characteristic values ​​of the planetary gear set, the engine speed to be adjusted is calculated, including: The engine speed to be adjusted is calculated based on the following formula: ； in, This indicates the engine speed to be adjusted. This represents the characteristic value of the planetary arrangement. Indicates the target rotational speed of the sun gear. This indicates the rotational speed of the gear.

5. The method according to claim 4, characterized in that, Based on the engine's economic speed range, the number of speed segments, and the engine speed to be adjusted, the actual target engine speed is calculated, including: The actual engine target speed is calculated based on the following formula: ； ； in, This indicates the upper limit of the engine speed within the engine's economic speed range. This indicates the lower limit speed of the engine within the engine's economic speed range; Indicates the number of speed segments; This represents the step size of the rotational speed segment, and rand is a random generation function; This indicates the actual target engine speed.

6. The method according to claim 1, characterized in that, Based on the generator's required power, the actual target engine speed, and the planetary gear set characteristic values, the sun gear regulating torque is calculated, including: The sun gear regulating torque is calculated based on the following formula: ； ； in, Indicates the actual target engine speed; Indicates the characteristic value of the planetary arrangement; Indicates the generator's required power; This indicates the regulating torque of the sun gear; Indicates the torque of the second PID controller; This indicates the feedforward speed regulation torque of the sun gear.

7. The method according to claim 6, characterized in that, Based on the engine's economic speed range, the generator's power requirement, and the planetary gear set characteristic values, the sun gear regulating torque is calculated, including: ； ； in, This indicates the upper limit speed of the generator within the engine's economic speed range; This indicates the torque of the third PID controller.

8. A vehicle-mounted device, characterized in that, The vehicle-mounted equipment includes: At least one processor, and a memory communicatively connected to said at least one processor; The memory stores a computer program that can be executed by the at least one processor, which is then executed by the at least one processor to enable the at least one processor to perform the vehicle power split control method according to any one of claims 1-7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the vehicle power split control method according to any one of claims 1-7.

10. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the vehicle power split control method according to any one of claims 1-7.

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