Hybrid multi-gear box bearing grading protection control method, device, equipment, medium and product

Abstract

The invention discloses a hybrid multi-gear box bearing grading protection control method, device and equipment, a medium and a product, and relates to the technical field of vehicle control, and the hybrid multi-gear box bearing grading protection control method comprises the steps that the rotating speed difference between a P1 generator and a gear ring is obtained; acquiring a rotating speed difference boundary of the bearing; if the rotating speed difference exceeds the rotating speed difference boundary, speed limiting torque control is conducted. On the basis of the characteristics of the hardware structure of the special gearbox for the multi-mode hybrid power, speed-limiting torque control judgment is performed on the basis of the rotating speed difference, so that the cost of a vehicle-mounted system is reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle control technology, and in particular to a hybrid multi-speed box bearing graded protection control method, device, equipment, medium and product. Background Art

[0002] At present, with the gradual increase in the market share of new energy vehicles, the trend of transmission electrification is becoming more and more obvious. During the shifting process from the pure electric mode (EV mode) to the electronic continuously variable transmission mode (ECVT mode), the vehicle speed may continue to increase, exceeding the maximum speed possible in the electronic continuously variable transmission mode, and the speed limit torque may appear immediately, causing the vehicle to stall; or it may be unable to switch to the electronic continuously variable transmission mode position due to exceeding the bearing boundary, making it impossible to start the engine at a high speed.

[0003] In the existing solution, a multi-mode hybrid dedicated transmission hardware system is used to meet customers' requirements for ultra-high-speed pure electric driving under normal road conditions and avoid the jerking phenomenon caused by exceeding the bearing boundary limit. However, the implementation of this solution requires additional hardware, which is costly. Summary of the invention

[0004] The main purpose of this application is to provide a hybrid multi-speed box bearing graded protection control method, device, equipment, medium and product, aiming to solve the technical problem that the existing solution requires additional hardware and is costly when avoiding the stalling phenomenon caused by the continuous increase in vehicle speed.

[0005] To achieve the above purpose, the present application proposes a hybrid multi-speed box bearing graded protection control method, the hybrid multi-speed box bearing graded protection control method comprising:

[0006] Get the speed difference between the P1 generator and the ring gear;

[0007] Obtain the speed difference boundary of the bearing;

[0008] If the speed difference exceeds the speed difference boundary, speed limiting torque control is performed.

[0009] In one embodiment, the step of obtaining the rotation speed difference boundary of the bearing includes:

[0010] Obtaining the long-term speed difference boundary and the short-term speed difference boundary of the bearing;

[0011] Comparing the speed difference with the long-term speed difference boundary to obtain a comparison result;

[0012] The rotation speed difference boundary of the bearing is set as the long-term rotation speed difference boundary or the short-term rotation speed difference boundary based on the comparison result.

[0013] In one embodiment, the step of setting the speed difference boundary of the bearing as the long-term speed difference boundary or the short-term speed difference boundary based on the comparison result includes:

[0014] If the speed difference does not exceed the long-term speed difference boundary, the short-term speed difference boundary is used as the speed difference boundary of the bearing;

[0015] If the speed difference exceeds the long-term speed difference boundary, determining the time during which the speed difference exceeds the long-term speed difference boundary;

[0016] The rotational speed difference limit of the bearing is set to the long-term rotational speed difference limit or the short-term rotational speed difference limit based on the excess time.

[0017] In one embodiment, the step of setting the speed difference boundary of the bearing to the long-term speed difference boundary or the short-term speed difference boundary based on the exceeding time comprises:

[0018] Get the preset time threshold;

[0019] If the exceeding time is greater than the preset time threshold, the long-term speed difference boundary is used as the speed difference boundary of the bearing;

[0020] If the exceeding time is not greater than the preset time threshold, the short-time rotation speed difference boundary is used as the rotation speed difference boundary of the bearing.

[0021] In one embodiment, the step of obtaining the speed difference between the P1 generator and the ring gear includes:

[0022] Get the vehicle's P1 generator speed;

[0023] Obtaining a ring gear speed of the vehicle;

[0024] A speed difference between the P1 generator and the ring gear is determined based on the P1 generator speed and the ring gear speed.

[0025] In one embodiment, the step of obtaining the ring gear speed of the vehicle includes:

[0026] Obtaining the vehicle speed and the transmission coefficient from the vehicle speed to the ring gear speed;

[0027] A ring gear speed of the vehicle is determined based on the vehicle speed and a vehicle speed to ring gear speed transfer coefficient.

[0028] In addition, to achieve the above purpose, the present application also proposes a hybrid multi-speed box bearing graded protection control device, the hybrid multi-speed box bearing graded protection control device comprising:

[0029] The speed acquisition module is used to obtain the speed difference between the P1 generator and the ring gear;

[0030] A boundary determination module, used for obtaining a speed difference boundary of a bearing;

[0031] The torque control module is used to perform speed-limiting torque control if the speed difference exceeds the speed difference boundary.

[0032] In addition, to achieve the above-mentioned purpose, the present application also proposes a hybrid multi-speed box bearing graded protection control device, which includes: a memory, a processor, and a computer program stored on the memory and executable on the processor, and the computer program is configured to implement the steps of the hybrid multi-speed box bearing graded protection control method as described above.

[0033] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by the processor, the steps of the hybrid multi-speed box bearing graded protection control method as described above are implemented.

[0034] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, it implements the steps of the hybrid multi-speed box bearing graded protection control method as described above.

[0035] One or more technical solutions proposed in this application have at least the following technical effects:

[0036] This application obtains the speed difference between the P1 generator and the ring gear; obtains the speed difference boundary of the bearing; and performs speed limit torque control if the speed difference exceeds the speed difference boundary. Due to the characteristics of the hardware structure of the multi-mode hybrid special gearbox, the speed limit torque control judgment is made based on the speed difference, which reduces the cost of the vehicle system. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0039] Figure 1 A flow chart of a first embodiment of a hybrid multi-speed box bearing graded protection control method of the present application;

[0040] Figure 2A flow chart of the second embodiment of the hybrid multi-speed box bearing graded protection control method of the present application;

[0041] Figure 3 A flow chart of the hybrid multi-speed box bearing graded protection control method provided in Example 3 of the present application;

[0042] Figure 4 This is a schematic diagram of the module structure of the hybrid multi-speed box bearing graded protection control device according to an embodiment of the present application;

[0043] Figure 5 It is a schematic diagram of the equipment structure of the hardware operating environment involved in the hybrid multi-speed box bearing graded protection control method in the embodiment of the present application.

[0044] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0045] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0046] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0047] The main solution of the embodiment of the present application is: obtaining the speed difference between the P1 generator and the ring gear; obtaining the speed difference boundary of the bearing; if the speed difference exceeds the speed difference boundary, performing speed limiting torque control.

[0048] At present, the existing technology uses a multi-mode hybrid special gearbox solution, and adopts dual synchronizers, single planetary gears, and dual motors in the transmission system to achieve power transmission and drive mode changes, avoiding vehicle setbacks caused by continuous high speeds. However, the need to add multiple hardware leads to high system implementation costs.

[0049] Based on the hardware characteristics of hybrid vehicles, this application provides a hybrid multi-speed box bearing graded protection control method, which obtains the speed difference boundary of the bearing based on the test, monitors the speed difference between the P1 generator (P1 generator) and the ring gear through calculation, and performs speed limit torque control based on the speed difference and the speed difference boundary. In this way, the above-mentioned problem can be solved: during the EV to ECVT shifting process, the vehicle speed may continue to increase, exceeding the maximum feasible speed of the ECVT, and the speed limit torque control may immediately occur, causing the vehicle to stall, or the bearing boundary may be exceeded, resulting in the inability to switch to the ECVT position, thereby failing to start the engine at a high speed.

[0050] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication and program running functions, such as a vehicle-mounted computing terminal or a cloud service terminal connected to the vehicle-mounted computing terminal, or an electronic device, virtual device, etc. that can realize the above functions. The following takes the hybrid multi-speed box bearing graded protection control (referred to as the control device) as an example to illustrate this embodiment and the following embodiments.

[0051] Based on this, the embodiment of the present application provides a hybrid multi-speed box bearing graded protection control method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the hybrid multi-speed box bearing graded protection control method of the present application.

[0052] In this embodiment, the hybrid multi-speed box bearing graded protection control method includes steps S10 to S40:

[0053] Step S10, obtaining the speed difference between the P1 generator and the ring gear;

[0054] In the embodiments of the present application, the electronic continuously variable transmission mode is composed of a planetary gear mechanism and two motors, and power distribution is achieved through electronic control. The engine operating point, generator operating point and motor operating point can all be electronically controlled to achieve optimal overall efficiency.

[0055] It should be noted that in hybrid vehicles, generators can usually be set at different positions, such as P0 generator, P1 generator, P2 generator, P3 generator and P4 generator. Generally speaking, the P1 generator can be called an ISG (Integrated Starter Generator) motor. The P1 generator can be located at the crankshaft end of the engine and integrated into the engine through the crankshaft as a rotor. It plays the role of generator, starter motor, kinetic energy recovery inverter and auxiliary power of the engine; the above-mentioned ring gear is a planetary carrier ring gear, which receives power transmitted from the planetary gear, so that the transmission mechanism can work at a predetermined speed and torque.

[0056] In addition, it should be noted that during operation, the speed difference between the P1 generator and the ring gear is affected by load changes, engine speed fluctuations, etc., and shows a trend of dynamic change.

[0057] It should be explained that the speed difference between the P1 generator and the ring gear will directly affect the energy conversion efficiency of the generator. At the same time, the change in the speed difference will affect the stability of the generator system. By monitoring and judging the speed difference and processing it in time based on the monitoring and judgment results, it is possible to avoid the vehicle from stalling due to speed limit torque control, or being unable to switch to the ECVT position due to exceeding the bearing boundary, thereby being unable to start the engine at high speed.

[0058] Step S20, obtaining the speed difference boundary of the bearing;

[0059] Step S30: If the speed difference exceeds the speed difference boundary, speed limiting torque control is performed.

[0060] It should be noted that the speed difference boundary of the bearing is also the range or limit of the maximum speed change that the bearing can withstand. The size of the speed difference boundary is related to the durability, fatigue life and stability of the bearing, and can be measured or estimated based on the materials used in actual applications and the use time, and the embodiments of the present application are not limited to this.

[0061] It is understandable that when the speed difference exceeds the speed difference boundary, the safety and stability of the system may be reduced, and energy loss and efficiency may be reduced. When the speed difference is too large and lasts for a long time, it may cause the vehicle to experience strong jerk. Through the solution of the present application, when the speed difference exceeds the speed difference boundary, speed limit torque control is performed, thereby improving the stability of the vehicle and reducing the sense of jerk.

[0062] The embodiment of the present application obtains the speed difference between the P1 generator and the ring gear; obtains the speed difference boundary of the bearing; and performs speed limit torque control if the speed difference exceeds the speed difference boundary. Due to the characteristics of the hardware structure of the multi-mode hybrid special gearbox, the speed limit torque control judgment is performed based on the speed difference, which reduces the cost of the vehicle system.

[0063] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. Figure 2 , the step of obtaining the rotation speed difference boundary of the bearing comprises:

[0064] Step S21, obtaining a long-term speed difference boundary and a short-term speed difference boundary of the bearing;

[0065] It should be noted that the above-mentioned long-term speed difference boundary is also the maximum speed variation range or limit that the bearing can withstand under long-term continuous working conditions; the above-mentioned short-term speed difference boundary is also the maximum speed variation range or limit that the bearing can withstand under short-term or transient working conditions.

[0066] Step S22, comparing the speed difference with the long-term speed difference boundary to obtain a comparison result;

[0067] Step S23: setting the speed difference boundary of the bearing to the long-term speed difference boundary or the short-term speed difference boundary based on the comparison result.

[0068] It can be understood that by comparing the speed difference between the P1 generator and the ring gear with the long-term speed difference boundary, and setting the speed difference boundary of the bearing to the long-term speed difference boundary or the short-term speed difference boundary according to the comparison result, the speed difference boundary of the bearing can be converted between the long-term speed difference boundary and the short-term speed difference boundary according to the real-time speed difference, thereby realizing dynamic control and improving the accuracy of vehicle bearing control.

[0069] Specifically, the step of setting the speed difference boundary of the bearing as the long-term speed difference boundary or the short-term speed difference boundary based on the comparison result includes:

[0070] If the speed difference does not exceed the long-term speed difference boundary, the short-term speed difference boundary is used as the speed difference boundary of the bearing;

[0071] If the speed difference exceeds the long-term speed difference boundary, determining the time during which the speed difference exceeds the long-term speed difference boundary;

[0072] The rotational speed difference limit of the bearing is set to the long-term rotational speed difference limit or the short-term rotational speed difference limit based on the excess time.

[0073] It should be noted that in the embodiment of the present application, the speed difference between the P1 generator and the ring gear is compared with the long-term speed difference boundary. If the real-time speed difference is lower than the long-term speed difference boundary, the short-term speed difference boundary is set as the speed difference boundary of the bearing.

[0074] Furthermore, when the real-time speed difference exceeds the long-term speed difference boundary, the time when the speed difference exceeds the long-term speed difference boundary can be recorded, and a judgment can be made based on the time. When the time exceeds the preset time threshold, the long-term speed difference boundary can be used as the speed difference boundary of the bearing control; if the time exceeds the preset time threshold, the short-term speed difference boundary is still set as the speed difference boundary of the bearing control. Specifically, the step of setting the speed difference boundary of the bearing to the long-term speed difference boundary or the short-term speed difference boundary based on the time exceeds includes:

[0075] Get the preset time threshold;

[0076] If the exceeding time is greater than the preset time threshold, the long-term speed difference boundary is used as the speed difference boundary of the bearing;

[0077] If the exceeding time is not greater than the preset time threshold, the short-time rotation speed difference boundary is used as the rotation speed difference boundary of the bearing.

[0078] It should be noted that the specific value of the above-mentioned preset time threshold can be set according to the needs of actual applications, and can be determined based on a deep learning algorithm or based on prior knowledge, and the embodiments of the present application are not limited to this.

[0079] It can be understood that since the short-time speed difference boundary is the maximum speed variation range or limit that the bearing can bear under a short-time or transient working state, the value of the short-time speed difference boundary is greater than the value of the long-time speed difference boundary.

[0080] In the embodiment of the present application, the bearing durability long-term speed difference boundary and the short-term speed difference boundary are obtained based on the test, and the speed difference between the P1 generator and the ring gear is calculated and monitored. Within the short-term speed difference boundary, the actual speed difference is allowed to exceed the long-term speed difference boundary for a certain period of time, so as to solve the problem of torque limitation due to speed limit. Since graded control is performed based on the bearing durability long-term speed difference boundary and the short-term speed difference boundary, the final bearing speed difference boundary is determined to avoid vehicle setbacks during bearing control, or failure to switch to the ECVT position due to exceeding the bearing boundary, thereby failing to start the engine at high speed.

[0081] Based on the first embodiment and / or the second embodiment of the present application, in the third embodiment of the present application, the same or similar contents as those of the above-mentioned first embodiment and / or the second embodiment can refer to the above introduction, and will not be repeated later. Figure 3 In the embodiment of the present application, the step of obtaining the speed difference between the P1 generator and the ring gear includes:

[0082] Step S11, obtaining the P1 generator speed of the vehicle;

[0083] Step S12, obtaining the ring gear speed of the vehicle;

[0084] Step S13: determining a speed difference between the P1 generator and the ring gear based on the P1 generator speed and the ring gear speed.

[0085] It should be noted that in the embodiment of the present application, the speed difference between the P1 generator and the ring gear can be calculated in real time, and the calculation method can be as follows:

[0086] n diff =n p1 -n i ;

[0087] Among them, n i is the speed of the ring gear, n p1 is the speed of the P1 generator, n diff The speed difference.

[0088] It should be noted that, in order to obtain the ring gear speed of the vehicle, the step of obtaining the ring gear speed of the vehicle includes:

[0089] Obtaining the vehicle speed and the transmission coefficient from the vehicle speed to the ring gear speed;

[0090] A ring gear speed of the vehicle is determined based on the vehicle speed and a vehicle speed to ring gear speed transfer coefficient.

[0091] It should be noted that in a hybrid vehicle, the ring gear speed is often proportional to the wheel speed or the drive shaft speed, thereby indirectly affecting the vehicle speed. Therefore, the gear speed of the vehicle can be determined based on the vehicle speed.

[0092] Specifically, the vehicle speed to ring gear speed transfer coefficient can be determined. The transfer coefficient can be determined based on the material and structure in actual application, and the specific value is not limited in the embodiment of the present application. Based on the vehicle speed and the vehicle speed to ring gear speed transfer coefficient, the vehicle ring gear speed can be determined. The calculation method can be as follows:

[0093] n i =V*K;

[0094] Where V is the vehicle speed, K is the vehicle speed to gear ring speed transfer coefficient, n i is the speed of the ring gear.

[0095] The embodiment of the present application obtains the P1 generator speed of the vehicle; obtains the vehicle speed and the transmission coefficient from the vehicle speed to the ring gear speed; determines the vehicle ring gear speed based on the vehicle speed and the transmission coefficient from the vehicle speed to the ring gear speed; and determines the speed difference between the P1 generator and the ring gear based on the P1 generator speed and the ring gear speed. Because it is based on the hardware characteristics of the transmission mechanism, the graded protection control of the hybrid multi-speed box bearing is realized, avoiding the vehicle from stalling due to speed limit and torque limit control, or failing to switch to the ECVT position due to exceeding the bearing boundary, thereby failing to start the engine at high speed.

[0096] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the hybrid multi-speed box bearing graded protection control method of the present application. More simple transformations based on this technical concept are all within the protection scope of the present application.

[0097] This application also provides a hybrid multi-speed box bearing graded protection control device, please refer to Figure 4 The hybrid multi-speed box bearing graded protection control device comprises:

[0098] The speed acquisition module 10 is used to obtain the speed difference between the P1 generator and the ring gear;

[0099] A boundary determination module 20, used to obtain a speed difference boundary of a bearing;

[0100] The torque control module 30 is configured to perform speed-limiting torque control if the speed difference exceeds the speed difference boundary.

[0101] The hybrid multi-speed box bearing graded protection control device provided by the present application adopts the hybrid multi-speed box bearing graded protection control method in the above-mentioned embodiment, which can solve the technical problem that the existing solution needs to add additional hardware and has high cost when avoiding the setback phenomenon caused by the continuous increase in vehicle speed. Compared with the prior art, the beneficial effects of the hybrid multi-speed box bearing graded protection control device provided by the present application are the same as the beneficial effects of the hybrid multi-speed box bearing graded protection control method provided by the above-mentioned embodiment, and the other technical features in the hybrid multi-speed box bearing graded protection control device are the same as the features disclosed in the above-mentioned embodiment method, which will not be repeated here.

[0102] The present application provides a hybrid multi-speed box bearing graded protection control device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the hybrid multi-speed box bearing graded protection control method in the above-mentioned embodiment one.

[0103] Reference below Figure 5 , which shows a schematic diagram of the structure of a hybrid multi-speed box bearing graded protection control device suitable for implementing the embodiment of the present application. The hybrid multi-speed box bearing graded protection control device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 5 The hybrid multi-speed box bearing graded protection control device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0104] like Figure 5As shown, the hybrid multi-speed box bearing graded protection control device may include a processing device 1001 (such as a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the hybrid multi-speed box bearing graded protection control device are also stored. The processing device 1001, ROM1002 and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 1003 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 1009. The communication device 1009 can allow the hybrid multi-speed box bearing graded protection control device to communicate wirelessly or wired with other devices to exchange data. Although the hybrid multi-speed box bearing graded protection control device with various systems is shown in the figure, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or have alternatively.

[0105] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0106] The hybrid multi-speed box bearing graded protection control device provided by the present application adopts the hybrid multi-speed box bearing graded protection control method in the above-mentioned embodiment, which can solve the technical problem that the existing solution needs to add additional hardware and has high cost when avoiding the setback phenomenon caused by the continuous increase in vehicle speed. Compared with the prior art, the beneficial effects of the hybrid multi-speed box bearing graded protection control device provided by the present application are the same as the beneficial effects of the hybrid multi-speed box bearing graded protection control method provided by the above-mentioned embodiment, and the other technical features in the hybrid multi-speed box bearing graded protection control device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0107] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0108] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0109] The present application provides a computer-readable storage medium having computer-readable program instructions (i.e., computer programs) stored thereon, and the computer-readable program instructions are used to execute the hybrid multi-speed box bearing graded protection control method in the above-mentioned embodiment.

[0110] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0111] The above-mentioned computer-readable storage medium may be included in the hybrid multi-speed box bearing graded protection control device; or it may exist independently without being assembled into the hybrid multi-speed box bearing graded protection control device.

[0112] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the hybrid multi-speed box bearing graded protection control device, the hybrid multi-speed box bearing graded protection control device:

[0113] Get the speed difference between the P1 generator and the ring gear;

[0114] Obtain the speed difference boundary of the bearing;

[0115] If the speed difference exceeds the speed difference boundary, speed limiting torque control is performed.

[0116] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0117] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0118] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0119] The readable storage medium provided by the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned hybrid multi-speed box bearing graded protection control method, and can solve the technical problem that the existing solution needs to add additional hardware and has high cost when avoiding the setback phenomenon caused by the continuous increase in vehicle speed. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present application are the same as the beneficial effects of the hybrid multi-speed box bearing graded protection control method provided by the above-mentioned embodiment, which will not be repeated here.

[0120] The present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of the above-mentioned hybrid multi-speed box bearing graded protection control method.

[0121] The computer program product provided by the present application can solve the technical problem that the existing solution needs to add additional hardware and is costly when avoiding the stalling phenomenon caused by the continuous increase in vehicle speed. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the hybrid multi-speed box bearing graded protection control method provided in the above embodiment, which will not be repeated here.

[0122] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A hybrid multi-speed box bearing graded protection control method, characterized in that: The method comprises: Get the speed difference between the P1 generator and the ring gear; Obtain the speed difference boundary of the bearing; If the speed difference exceeds the speed difference boundary, speed limiting torque control is performed.

2. The hybrid multi-speed box bearing graded protection control method according to claim 1 is characterized in that: The step of obtaining the rotation speed difference boundary of the bearing includes: Obtaining the long-term speed difference boundary and the short-term speed difference boundary of the bearing; Comparing the speed difference with the long-term speed difference boundary to obtain a comparison result; The rotation speed difference boundary of the bearing is set as the long-term rotation speed difference boundary or the short-term rotation speed difference boundary based on the comparison result.

3. The hybrid multi-speed box bearing graded protection control method according to claim 2 is characterized in that: The step of setting the speed difference boundary of the bearing as the long-term speed difference boundary or the short-term speed difference boundary based on the comparison result comprises: If the speed difference does not exceed the long-term speed difference boundary, the short-term speed difference boundary is used as the speed difference boundary of the bearing; If the speed difference exceeds the long-term speed difference boundary, determining the time during which the speed difference exceeds the long-term speed difference boundary; The rotational speed difference limit of the bearing is set to the long-term rotational speed difference limit or the short-term rotational speed difference limit based on the excess time.

4. The hybrid multi-speed box bearing graded protection control method according to claim 3 is characterized in that: The step of setting the speed difference boundary of the bearing to the long-term speed difference boundary or the short-term speed difference boundary based on the exceeding time comprises: Get the preset time threshold; If the exceeding time is greater than the preset time threshold, the long-term speed difference boundary is used as the speed difference boundary of the bearing; If the exceeding time is not greater than the preset time threshold, the short-time rotation speed difference boundary is used as the rotation speed difference boundary of the bearing.

5. The hybrid multi-speed box bearing graded protection control method according to claim 1 is characterized in that: The step of obtaining the speed difference between the P1 generator and the ring gear comprises: Get the vehicle's P1 generator speed; Obtaining a ring gear speed of the vehicle; A speed difference between the P1 generator and the ring gear is determined based on the P1 generator speed and the ring gear speed.

6. The hybrid multi-speed box bearing graded protection control method according to claim 5 is characterized in that: The step of obtaining the ring gear speed of the vehicle comprises: Obtaining the vehicle speed and the transmission coefficient from the vehicle speed to the ring gear speed; A ring gear speed of the vehicle is determined based on the vehicle speed and a vehicle speed to ring gear speed transfer coefficient.

7. A hybrid multi-speed box bearing graded protection control device, characterized in that: The hybrid multi-speed box bearing graded protection control device comprises: The speed acquisition module is used to obtain the speed difference between the P1 generator and the ring gear; A boundary determination module, used for obtaining a speed difference boundary of a bearing; The torque control module is used to perform speed-limiting torque control if the speed difference exceeds the speed difference boundary.

8. A hybrid multi-speed box bearing graded protection control device, characterized in that: The device includes: a memory, a processor, and a hybrid multi-speed box bearing graded protection control program stored in the memory and executable on the processor, wherein the hybrid multi-speed box bearing graded protection control program is configured to implement the steps of the hybrid multi-speed box bearing graded protection control method as described in any one of claims 1 to 6.

9. A storage medium, characterized in that: The storage medium stores a hybrid multi-speed box bearing graded protection control program, and when the hybrid multi-speed box bearing graded protection control program is executed by the processor, the steps of the hybrid multi-speed box bearing graded protection control method as described in any one of claims 1 to 6 are implemented.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the steps of the hybrid multi-speed box bearing graded protection control method as described in any one of claims 1 to 6 are implemented.

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