Gear shifting control method and device, equipment, storage medium and product

Abstract

The invention provides a gear shifting control method and device, equipment, a storage medium and a product, and relates to the technical field of AMT control. Based on the input shaft rotating speed and the output shaft rotating speed, the electromagnetic valve duty ratio is determined; and based on the electromagnetic valve duty ratio, the electromagnetic valve is controlled to adjust the air inflow of the gear shifting air cylinder so as to generate gear shifting force, the input shaft rotating speed and the output shaft rotating speed are adjusted to be synchronous, and gear shifting is completed. By means of the mode, the gear shifting process is controllable, gear shifting impact caused by the fact that gas rapidly enters the gear shifting air cylinder in a short time can be avoided, device damage caused by the gear shifting impact is reduced, the service life of a synchronizer is prolonged, accidental tooth beating abnormal sound is reduced, and the smoothness and comfort of vehicle driving are improved.

Description

Technical Field

[0001] The present invention relates to the field of AMT (Automated Mechanical Transmission) control technology, and in particular to a shift control method, device, equipment, storage medium and product. Background Art

[0002] At present, the AMT sub-box of the vehicle mostly uses synchronizers for gear shifting. During the operation of the car, more speed ratios need to be achieved by switching gears.

[0003] When controlling the gear shift, the synchronizer needs to reduce the speed of the corresponding gear first. When the sleeve speed is synchronized with the gear speed, that is, when the input shaft speed is synchronized with the output shaft speed, the gear shift is completed. In order to shorten the gear shift time as much as possible, when the gear shift conditions are met, the solenoid valve (Pulse Width Modulation, PWM) needs to be opened immediately to control the compressed gas to quickly enter the gear shift cylinder to push the gear shift piston to generate the gear shift force and complete the gear shift.

[0004] However, in the actual gear shift control process, due to the high compressibility of pneumatic control and its strong nonlinearity, the gear shift process of the synchronizer is difficult to control, which can easily cause gear shift shock, shorten the service life of the synchronizer, and be accompanied by occasional gear noise, affecting the smoothness and comfort of vehicle driving. Summary of the invention

[0005] The present invention provides a shift control method, device, equipment, storage medium and product to solve the defects in the prior art that the shift process is difficult to control, easily causes shift shock, shortens the service life of the synchronizer, and is accompanied by occasional gear rattling noise, affecting the smoothness and comfort of vehicle driving.

[0006] The present invention provides a shift control method, comprising: obtaining an input shaft speed and an output shaft speed; determining a solenoid valve duty cycle based on the input shaft speed and the output shaft speed; and controlling the solenoid valve to adjust the air intake of a shift cylinder based on the solenoid valve duty cycle to generate a shift force, adjust the input shaft speed and the output shaft speed to be synchronized, and complete the shift.

[0007] According to a shift control method provided by the present invention, a solenoid valve duty cycle is determined based on an input shaft speed and an output shaft speed, including: determining a difference between an input shaft speed and an output shaft speed; obtaining a transmission oil temperature of the vehicle; determining proportional-integral-differential control parameters of the vehicle under current conditions based on the transmission oil temperature and the difference; and determining a solenoid valve duty cycle based on the proportional-integral-differential control parameters.

[0008] According to a shift control method provided by the present invention, after determining the duty cycle of the solenoid valve based on the input shaft speed and the output shaft speed, the method includes: obtaining a synchronization slope reference value of the synchronizer; determining the actual synchronization slope of the synchronizer; determining the wear information of the friction surface based on the synchronization slope reference value and the actual synchronization slope; the friction surface is the friction surface between the cone ring and the synchronization ring of the synchronizer; based on the wear information, performing wear compensation on the solenoid valve duty cycle to obtain the compensated solenoid valve duty cycle.

[0009] According to a shift control method provided by the present invention, a synchronization slope reference value of a synchronizer is obtained, including: determining a preset oil temperature reference value and a preset solenoid valve duty cycle reference value; when the transmission oil temperature is the preset oil temperature reference value and the solenoid valve duty cycle is the preset solenoid valve duty cycle reference value, determining the synchronization slope reference value of the synchronizer.

[0010] According to a shift control method provided by the present invention, the calculation formula of the actual synchronization slope is: ; in, Indicates that the synchronizer is The synchronization slope at time, Indicates that the synchronizer is The synchronization slope at time, Indicates that the synchronizer is The synchronization slope at time, Indicates that the synchronizer is The synchronization slope at time, express The coefficient of express The coefficient of express The coefficient of express The coefficient of Indicates the actual synchronization slope.

[0011] According to a shift control method provided by the present invention, based on the solenoid valve duty cycle, the solenoid valve is controlled to adjust the intake volume of the shift cylinder to generate a shift force, adjust the input shaft speed and the output shaft speed to synchronize, and complete the shift, including: based on the solenoid valve duty cycle, the solenoid valve is controlled to adjust the intake volume of the shift cylinder to generate a shift force, adjust the input shaft speed and the output shaft speed, and determine whether the adjusted input shaft speed and the adjusted output shaft speed are synchronized; if the adjusted input shaft speed and the adjusted output shaft speed are not synchronized, return to the step of obtaining the input shaft speed and the output shaft speed until the input shaft speed and the output shaft speed are synchronized to complete the shift.

[0012] The present invention also provides a shift control device, including: an acquisition module, used to acquire the input shaft speed and the output shaft speed; a solenoid valve duty cycle calculation module, used to determine the solenoid valve duty cycle based on the input shaft speed and the output shaft speed; a shift module, used to control the solenoid valve to adjust the air intake of the shift cylinder based on the solenoid valve duty cycle to generate a shift force, adjust the input shaft speed and the output shaft speed to synchronize, and complete the shift.

[0013] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any of the above-mentioned shift control methods when executing the computer program.

[0014] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the computer program implements any of the above-mentioned shift control methods.

[0015] The present invention also provides a computer program product, comprising a computer program, and when the computer program is executed by a processor, any of the above-mentioned shift control methods is implemented.

[0016] The shift control method, device, equipment, storage medium and product provided by the present invention first determine the solenoid valve duty cycle according to the input shaft speed and the output shaft speed, and then control the solenoid valve to adjust the air intake of the shift cylinder based on the solenoid valve duty cycle to generate a shift force, adjust the input shaft speed and the output shaft speed to synchronize, and complete the shift. Compared with the prior art, since the air intake of the shift cylinder can be adjusted according to the solenoid valve duty cycle, the shift process is controllable, and the shift shock caused by the rapid entry of gas into the shift cylinder in a short time can be avoided, and the device damage caused by the shift shock can be reduced, which is beneficial to extending the service life of the synchronizer, reducing occasional gear rattling noises, and improving the smoothness and comfort of vehicle driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is one of the flow charts of the shift control method provided by the present invention.

[0019] Figure 2 This is the second flow chart of the shift control method provided by the present invention.

[0020] Figure 3 This is the third flow chart of the shift control method provided by the present invention.

[0021] Figure 4 It is a structural schematic diagram of the shift control device provided by the present invention.

[0022] Figure 5 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that in the description of the present invention, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "include one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements. The orientation or position relationship indicated by the terms "upper", "lower" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The terms "first", "second", etc. in the present invention are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" means at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0026] It should be noted that all actions of acquiring signals, information or data in the present invention are performed in compliance with the corresponding data protection laws and policies of the country where the device is located and with the authorization given by the owner of the corresponding device.

[0027] See also Figure 1 , Figure 1 This is one of the flow charts of the shift control method provided by the present invention. In this embodiment, the shift control method is applied to a transmission controller installed in a vehicle, and the shift control method includes steps S110 to S130, and each step is specifically as follows: S110: Obtain input shaft speed and output shaft speed.

[0028] S120: Determine the solenoid valve duty cycle based on the input shaft speed and the output shaft speed.

[0029] Specifically, the input shaft speed and the output shaft speed are input into the PID controller (Proportional-Integral-Derivative control) in the synchronizer shift control unit. The PID controller can dynamically adjust and output the solenoid valve duty cycle (i.e., PWM duty cycle) according to the input shaft speed and the output shaft speed to control the output of different shift forces.

[0030] Preferably, the synchronization performance of the current synchronizer can be calculated at the same time. When the wear of the synchronizer increases, causing the synchronization performance of the synchronizer to drop to a certain level, the PID controller can introduce corresponding wear compensation and make more precise adjustments to the solenoid valve duty cycle to improve the accuracy of the solenoid valve duty cycle, thereby accurately controlling the subsequent gear shifting process.

[0031] S130: Based on the solenoid valve duty cycle, the solenoid valve is controlled to adjust the air intake of the shift cylinder to generate a shift force, adjust the input shaft speed and the output shaft speed to be synchronized, and complete the shift.

[0032] Specifically, in the present embodiment, the air intake end of the shift cylinder is controlled by an electromagnetic valve, and the transmission controller can output a corresponding control signal according to the duty cycle of the electromagnetic valve calculated by the PID controller, and adjust the opening of the electromagnetic valve to change the air intake volume of the shift cylinder to generate a corresponding shift force, thereby adjusting the input shaft speed and the output shaft speed to be synchronized and completing the shift.

[0033] It can be understood that the synchronizer shift control valve can open different solenoid valve duty ratios according to the control signal output by the transmission controller, and different shift forces can be generated after ventilation.

[0034] Among them, at the beginning of the shift process, the PID controller in the synchronizer shift control unit will calculate based on the difference between the input shaft speed and the output shaft speed, and the calculated difference will be directly used to determine the solenoid valve duty cycle. Generally, when the calculated difference is large, the solenoid valve duty cycle is large; when the calculated difference is small, the solenoid valve duty cycle is small.

[0035] Optionally, in order to ensure that the input shaft speed and the output shaft speed can be quickly synchronized, the PID controller in the synchronizer shift control unit can use a two-dimensional linear interpolation module to dynamically adjust it during the control process.

[0036] Since the performance of the transmission synchronizer is different when working at different temperatures, the two-dimensional linear interpolation module can calculate and output the proportional integral differential control parameters (i.e., PID parameters) of the vehicle under the current environment according to the difference between the input transmission oil temperature and the input shaft speed and the output shaft speed, and then calculate the solenoid valve duty cycle according to the proportional integral differential control parameters.

[0037] The two-dimensional linear interpolation module can output PID parameters to control the solenoid valve duty cycle to increase and achieve rapid synchronization when the gearbox oil temperature is high, the speed difference (i.e., the difference between the input shaft speed and the output shaft speed) is large, and the synchronizer working performance is low; when the speed difference (i.e., the difference between the input shaft speed and the output shaft speed) is small, the two-dimensional linear interpolation module can output PID parameters to control the solenoid valve duty cycle to appropriately decrease, and complete the gear shift after achieving speed synchronization; when the real-time difference between the input shaft speed and the output shaft speed is small enough and less than the preset threshold, the solenoid valve duty cycle can be adjusted to 100% to complete the synchronous gear shift.

[0038] The shift control method provided in this embodiment first determines the duty cycle of the solenoid valve according to the input shaft speed and the output shaft speed, and then controls the solenoid valve to adjust the intake volume of the shift cylinder based on the duty cycle of the solenoid valve to generate a shift force, adjust the input shaft speed and the output shaft speed to synchronize, and complete the shift. Compared with the prior art, since the intake volume of the shift cylinder can be adjusted according to the duty cycle of the solenoid valve, the shift process is controllable, which can avoid the shift shock caused by the rapid entry of gas into the shift cylinder in a short time, reduce the damage to the device caused by the shift shock, and is beneficial to extend the service life of the synchronizer, reduce occasional gear rattling noise, and improve the smoothness and comfort of vehicle driving.

[0039] In some embodiments, the duty cycle of the solenoid valve is determined based on the input shaft speed and the output shaft speed, including: determining the difference between the input shaft speed and the output shaft speed; obtaining the transmission oil temperature of the vehicle; based on the transmission oil temperature and the difference, determining the proportional integral differential control parameters of the vehicle under the current environment; based on the proportional integral differential control parameters, determining the duty cycle of the solenoid valve.

[0040] It is understandable that since the performance of the transmission synchronizer is different when operating at different temperatures, the influence of the transmission oil temperature needs to be additionally considered when performing the shift control of the synchronizer.

[0041] See also Figure 2 , Figure 2 This is the second flow chart of the shift control method provided by the present invention.

[0042] like Figure 2 As shown, the input shaft speed and the output shaft speed can be collected according to the gearbox position sensor and the gearbox speed sensor, the gearbox oil temperature of the vehicle can be collected through the gearbox oil temperature sensor, and the data such as the input shaft speed, the output shaft speed and the gearbox oil temperature can be transmitted to the gearbox controller; after determining the input shaft speed and the output shaft speed, the input shaft speed and the output shaft speed are input to the PID controller in the synchronizer shift control unit, and the PID controller can use a two-dimensional linear interpolation module to calculate the difference between the input shaft speed and the output shaft speed, and according to the difference between the input gearbox oil temperature, the input shaft speed and the output shaft speed, calculate and output the proportional integral differential control parameters (i.e., PID parameters) of the vehicle under the current environment, and then calculate the solenoid valve duty cycle according to the proportional integral differential control parameters.

[0043] The shift control method provided in this embodiment fully considers the influence of the transmission oil temperature on the synchronizer shift control process, and introduces the transmission oil temperature into the calculation of the solenoid valve duty cycle, which can improve the accuracy of the solenoid valve duty cycle calculation, thereby facilitating the precise control of the synchronizer shift process.

[0044] In some embodiments, after determining the duty cycle of the solenoid valve based on the input shaft speed and the output shaft speed, it includes: obtaining a synchronization slope reference value of the synchronizer; determining an actual synchronization slope of the synchronizer; determining wear information of the friction surface based on the synchronization slope reference value and the actual synchronization slope; the friction surface is the friction surface between the cone ring and the synchronizer ring of the synchronizer; based on the wear information, performing wear compensation on the solenoid valve duty cycle to obtain a compensated solenoid valve duty cycle.

[0045] During the use of the synchronizer, the friction surface between the cone ring and the synchronizer ring of the synchronizer will wear, causing the synchronization performance of the synchronizer to decline, which may make it difficult to achieve the expected effect of adjusting the duty cycle of the solenoid valve. Therefore, the wear condition of the friction surface between the cone ring and the synchronizer ring can be fed back by calculating the synchronization slope of the synchronizer, so that in the process of speed synchronization control, wear compensation can be added according to the current wear condition of the friction surface to optimize the adjustment effect of the solenoid valve duty cycle and improve the accuracy of synchronizer synchronization control.

[0046] Specifically, a preset oil temperature reference value and a preset solenoid valve duty cycle reference value are selected, and when the transmission oil temperature is the preset oil temperature reference value and the solenoid valve duty cycle is the preset solenoid valve duty cycle reference value, a synchronization slope reference value of the synchronizer is determined.

[0047] For example, the preset oil temperature reference value is 50°C, and the preset solenoid valve duty cycle reference value is 70%; when the transmission oil temperature is 50°C and the solenoid valve duty cycle is 70%, the synchronization slope of the synchronizer is calculated at this time, and the synchronization slope of the synchronizer in this case is used as the synchronization slope reference value of the synchronizer.

[0048] Furthermore, an actual synchronization slope of the synchronizer is determined.

[0049] Specifically, assuming that the synchronizer The synchronization slope at time , then the calculation formula for the actual synchronization slope of the synchronizer is: ; in, Indicates that the synchronizer is The synchronization slope at time, Indicates that the synchronizer is The synchronization slope at time, Indicates that the synchronizer is The synchronization slope at time, Indicates that the synchronizer is The synchronization slope at time, express The coefficient of express The coefficient of express The coefficient of express The coefficient of Indicates the actual synchronization slope.

[0050] By measuring the actual synchronization slope of the synchronizer after filtering at different times for many times, the wear condition of the friction surface between the cone ring and the synchronizer ring can be reflected. The wear condition of the friction surface can reflect the current synchronization performance of the synchronizer.

[0051] Among them, the coefficients in the above formula are to , and the filter order can be calibrated according to actual conditions.

[0052] Furthermore, based on the synchronization slope reference value and the actual synchronization slope, the wear information of the friction surface is determined, and based on the wear information, the duty cycle of the solenoid valve is compensated for wear to obtain the compensated duty cycle of the solenoid valve.

[0053] Generally, in an ideal situation, the actual synchronization slope should be consistent with the synchronization slope reference value, but in actual situations, the friction surface between the cone ring and the synchronization ring will inevitably wear, which will directly lead to an error between the actual synchronization slope and the synchronization slope reference value. This error will continue to expand as the synchronizer is used. Therefore, it is necessary to determine the wear information of the friction surface based on the difference between the synchronization slope reference value and the actual synchronization slope, and based on the wear information, perform wear compensation on the solenoid valve duty cycle to obtain the compensated solenoid valve duty cycle.

[0054] Furthermore, according to the compensated solenoid valve duty cycle, the solenoid valve is controlled to adjust the air intake of the shift cylinder to generate a shift force, thereby adjusting the input shaft speed and the output shaft speed to be synchronized and completing the shift.

[0055] The shift control method provided in this embodiment fully considers the impact of the degradation of the synchronizer synchronization performance caused by the wear of the friction surface between the cone ring and the synchronizer ring. In order to achieve precise synchronization control, wear compensation is introduced in the calculation of the solenoid valve duty cycle to optimize the adjustment effect of the solenoid valve duty cycle, which can effectively improve the accuracy of the synchronizer synchronization control.

[0056] In some embodiments, obtaining a synchronization slope reference value of a synchronizer includes: determining a preset oil temperature reference value and a preset solenoid valve duty cycle reference value; when the transmission oil temperature is the preset oil temperature reference value and the solenoid valve duty cycle is the preset solenoid valve duty cycle reference value, determining the synchronization slope reference value of the synchronizer.

[0057] For example, the preset oil temperature reference value is 50°C, and the preset solenoid valve duty cycle reference value is 70%; when the transmission oil temperature is 50°C and the solenoid valve duty cycle is 70%, the synchronization slope of the synchronizer is calculated at this time, and the synchronization slope of the synchronizer in this case is used as the synchronization slope reference value of the synchronizer.

[0058] In some embodiments, the actual synchronization slope is calculated as: ; in, Indicates that the synchronizer is The synchronization slope at time, Indicates that the synchronizer is The synchronization slope at time, Indicates that the synchronizer is The synchronization slope at time, Indicates that the synchronizer is The synchronization slope at time, express The coefficient of express The coefficient of express The coefficient of express The coefficient of Indicates the actual synchronization slope.

[0059] In some embodiments, based on the solenoid valve duty cycle, the solenoid valve is controlled to adjust the air intake volume of the shift cylinder to generate a shift force, adjust the input shaft speed and the output shaft speed to synchronize, and complete the shift, including: based on the solenoid valve duty cycle, the solenoid valve is controlled to adjust the air intake volume of the shift cylinder to generate a shift force, adjust the input shaft speed and the output shaft speed, and determine whether the adjusted input shaft speed and the adjusted output shaft speed are synchronized; if the adjusted input shaft speed and the adjusted output shaft speed are not synchronized, return to the step of obtaining the input shaft speed and the output shaft speed until the input shaft speed and the output shaft speed are synchronized to complete the shift.

[0060] See also Figure 3 , Figure 3 This is the third flow chart of the shift control method provided by the present invention.

[0061] like Figure 3As shown, the input shaft speed and the output shaft speed are collected through the gearbox position sensor and the gearbox speed sensor, the gearbox oil temperature of the vehicle is collected through the gearbox oil temperature sensor, and the data such as the input shaft speed, the output shaft speed and the gearbox oil temperature are transmitted to the gearbox controller; the PID controller in the synchronizer shift control unit uses a two-dimensional linear interpolation module to calculate the difference between the input shaft speed and the output shaft speed, and calculates and outputs the proportional integral differential control parameters (i.e., PID parameters) of the vehicle under the current environment according to the input gearbox oil temperature, the difference between the input shaft speed and the output shaft speed, and then calculates the solenoid valve duty cycle according to the proportional integral differential control parameters, and controls the solenoid valve to adjust the air intake of the shift cylinder based on the solenoid valve duty cycle to generate a shift force, adjust the input shaft speed and the output shaft speed, and determine whether the adjusted input shaft speed and the adjusted output shaft speed are synchronized.

[0062] If the adjusted input shaft speed and the adjusted output shaft speed are not synchronized, return to the step of obtaining the input shaft speed and the output shaft speed, and continuously calculate and adjust the solenoid valve duty cycle according to the real-time collected transmission oil temperature, input shaft speed and output shaft speed, so as to realize the synchronizer shifting control based on the solenoid valve duty cycle, until the input shaft speed and the output shaft speed are synchronized and the shifting is completed.

[0063] It can be understood that the above-mentioned synchronizer shift control method can be modeled into a synchronizer shift control model. The synchronizer shift control model can be implanted into the AMT control strategy and converted into corresponding codes and burned into the transmission controller, so that the transmission controller can realize synchronous control of the synchronizer speed according to the burned code and complete the shift operation.

[0064] The shift control method provided in this embodiment uses PID parameters to dynamically control the opening of the solenoid valve according to the difference between the input shaft speed and the output shaft speed, so as to achieve effective control of the synchronizer shifting process; in order to solve the problem of reduced synchronization performance caused by wear of the friction surface between the synchronizer cone ring and the synchronizer ring, the current wear condition is evaluated by calculating the synchronization slope in real time, and wear compensation is performed based on the wear condition to improve the accuracy of the solenoid valve duty cycle, and then the synchronizer shifting process can be accurately controlled based on the solenoid valve duty cycle, thereby avoiding shifting shock and abnormal noise, extending the service life of the synchronizer, and improving the shifting quality.

[0065] The present invention also provides a shift control device. Figure 4 , Figure 4 4 is a schematic diagram of the structure of the shift control device provided by the present invention. In this embodiment, the shift control device includes an acquisition module 410 , a solenoid valve duty ratio calculation module 420 and a shift module 430 .

[0066] The acquisition module 410 is used to acquire the input shaft speed and the output shaft speed.

[0067] The solenoid valve duty cycle calculation module 420 is used to determine the solenoid valve duty cycle based on the input shaft speed and the output shaft speed.

[0068] The shift module 430 is used to control the solenoid valve to adjust the air intake of the shift cylinder based on the solenoid valve duty cycle to generate a shift force, adjust the input shaft speed and the output shaft speed to be synchronized, and complete the shift.

[0069] In some embodiments, the solenoid valve duty cycle calculation module 420 is used to determine the difference between the input shaft speed and the output shaft speed; obtain the vehicle's transmission oil temperature; based on the transmission oil temperature and the difference, determine the proportional integral differential control parameters of the vehicle under the current environment; based on the proportional integral differential control parameters, determine the solenoid valve duty cycle.

[0070] In some embodiments, the solenoid valve duty cycle calculation module 420 is used to obtain a synchronization slope reference value of the synchronizer; determine the actual synchronization slope of the synchronizer; determine the wear information of the friction surface based on the synchronization slope reference value and the actual synchronization slope; the friction surface is the friction surface between the cone ring and the synchronization ring of the synchronizer; based on the wear information, the solenoid valve duty cycle is compensated for wear to obtain the compensated solenoid valve duty cycle.

[0071] In some embodiments, the solenoid valve duty cycle calculation module 420 is used to determine a preset oil temperature reference value and a preset solenoid valve duty cycle reference value; when the transmission oil temperature is the preset oil temperature reference value and the solenoid valve duty cycle is the preset solenoid valve duty cycle reference value, the synchronization slope reference value of the synchronizer is determined.

[0072] In some embodiments, the actual synchronization slope is calculated as: ; in, Indicates that the synchronizer is The synchronization slope at time, Indicates that the synchronizer is The synchronization slope at time, Indicates that the synchronizer is The synchronization slope at time, Indicates that the synchronizer is The synchronization slope at time, express The coefficient of express The coefficient of express The coefficient of express The coefficient of Indicates the actual synchronization slope.

[0073] In some embodiments, the shift module 430 is used to control the solenoid valve to adjust the intake volume of the shift cylinder based on the solenoid valve duty cycle to generate a shift force, adjust the input shaft speed and the output shaft speed, and determine whether the adjusted input shaft speed and the adjusted output shaft speed are synchronized; if the adjusted input shaft speed and the adjusted output shaft speed are not synchronized, return to the step of obtaining the input shaft speed and the output shaft speed until the input shaft speed and the output shaft speed are synchronized to complete the shift.

[0074] The invention also provides an electronic device. Figure 5 is a schematic diagram of the structure of the electronic device provided by the present invention, such as Figure 5 As shown, the electronic device may include: a processor 510, a communication interface 520, a memory 530 and a communication bus 540, wherein the processor 510, the communication interface 520 and the memory 530 communicate with each other through the communication bus 540. The processor 510 may call the logic instructions in the memory 530 to execute the shift control method.

[0075] In addition, the logic instructions in the above-mentioned memory 530 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0076] The present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the shift control method provided by the above methods is implemented.

[0077] The present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the shift control methods provided by the above methods.

[0078] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0079] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gear shift control method, characterized in that: include: Get the input shaft speed and output shaft speed; Determining a solenoid valve duty cycle based on the input shaft speed and the output shaft speed; Based on the duty cycle of the solenoid valve, the solenoid valve is controlled to adjust the air intake of the shift cylinder to generate a shift force, and the input shaft speed is adjusted to be synchronized with the output shaft speed to complete the shift.

2. The shift control method according to claim 1, characterized in that: The step of determining the duty cycle of the solenoid valve based on the input shaft speed and the output shaft speed includes: determining a difference between the input shaft speed and the output shaft speed; Get the vehicle's transmission oil temperature; Determining a proportional-integral-derivative control parameter of the vehicle under current conditions based on the transmission oil temperature and the difference; Based on the proportional-integral-derivative control parameter, the duty cycle of the solenoid valve is determined.

3. The shift control method according to claim 1, characterized in that: After determining the duty cycle of the solenoid valve based on the input shaft speed and the output shaft speed, the method further comprises: Get the synchronization slope reference value of the synchronizer; determining an actual synchronization slope of the synchronizer; Based on the synchronization slope reference value and the actual synchronization slope, the wear information of the friction surface is determined; the friction surface is the friction surface between the cone ring and the synchronization ring of the synchronizer; Based on the wear information, wear compensation is performed on the duty cycle of the solenoid valve to obtain a compensated duty cycle of the solenoid valve.

4. The shift control method according to claim 3, characterized in that: The step of obtaining a synchronization slope reference value of a synchronizer includes: Determine a preset oil temperature reference value and a preset solenoid valve duty cycle reference value; When the transmission oil temperature is the preset oil temperature reference value and the solenoid valve duty cycle is the preset solenoid valve duty cycle reference value, a synchronization slope reference value of the synchronizer is determined.

5. The shift control method according to claim 3, characterized in that: The calculation formula of the actual synchronization slope is: ； in, Indicates that the synchronizer The synchronization slope at time, Indicates that the synchronizer The synchronization slope at time, Indicates that the synchronizer The synchronization slope at time, Indicates that the synchronizer The synchronization slope at time, express The coefficient of express The coefficient of express The coefficient of express The coefficient of represents the actual synchronization slope.

6. The shift control method according to claim 1, characterized in that: Based on the solenoid valve duty cycle, controlling the solenoid valve to adjust the air intake of the shift cylinder to generate a shift force, adjusting the input shaft speed and the output shaft speed to be synchronized, and completing the shift, includes: Based on the solenoid valve duty cycle, controlling the solenoid valve to adjust the air intake of the shift cylinder to generate a shift force, adjusting the input shaft speed and the output shaft speed, and determining whether the adjusted input shaft speed and the adjusted output shaft speed are synchronized; If the adjusted input shaft speed and the adjusted output shaft speed are not synchronized, the process returns to the step of obtaining the input shaft speed and the output shaft speed until the input shaft speed and the output shaft speed are synchronized, thereby completing the gear shift.

7. A gear shift control device, characterized in that: include: An acquisition module, used for acquiring input shaft speed and output shaft speed; A solenoid valve duty cycle calculation module, used to determine the solenoid valve duty cycle based on the input shaft speed and the output shaft speed; The shift module is used to control the solenoid valve to adjust the air intake of the shift cylinder based on the duty cycle of the solenoid valve to generate a shift force, adjust the input shaft speed and the output shaft speed to synchronize, and complete the shift.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the shift control method according to any one of claims 1 to 6 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the shift control method according to any one of claims 1 to 6 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the shift control method according to any one of claims 1 to 6 is implemented.

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