Shift control method, device, equipment, storage medium and product

Abstract

The application provides a gear shifting control method, device, equipment, storage medium and product, relates to the AMT control technical field, and the method comprises the steps that an input shaft rotating speed and an output shaft rotating speed are acquired; based on the input shaft rotating speed and the output shaft rotating speed, the duty cycle of a solenoid valve is determined; based on the duty cycle of the solenoid valve, the intake amount of a gear shifting cylinder is controlled to generate a gear shifting force, so that the input shaft rotating speed and the output shaft rotating speed are synchronized, and gear shifting is completed. In the above manner, the gear shifting process is controllable, gear shifting impact caused by the rapid entry of gas into the gear shifting cylinder in a short time can be avoided, device damage caused by gear shifting impact is reduced, the service life of a synchronizer is prolonged, accidental gear tooth noise is reduced, and the smoothness and comfort of vehicle driving are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of AMT (Automated Mechanical Transmission) control, and in particular to a gear shifting control method, device, equipment, storage medium and product. BACKGROUND

[0002] At present, the AMT auxiliary gearbox of a vehicle usually uses a synchronizer for gear shifting. In the process of vehicle operation, more speed ratios are achieved through gear switching.

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

[0004] However, in the actual gear shifting control process, due to the large compressibility of the pneumatic control and the strong nonlinearity thereof, the gear shifting process of the synchronizer is difficult to control, which easily causes gear shifting impact, shortens the service life of the synchronizer, and is accompanied by occasional gear impact noise, thereby affecting the smoothness and comfort of vehicle driving. SUMMARY

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

[0006] The present application provides a gear shifting control method, comprising: acquiring the rotational speed of an input shaft and the rotational speed of an output shaft; determining the duty cycle of an electromagnetic valve based on the rotational speed of the input shaft and the rotational speed of the output shaft; and controlling the electromagnetic valve to adjust the intake amount of a gear shifting cylinder based on the duty cycle of the electromagnetic valve, so as to generate a gear shifting force, adjust the rotational speed of the input shaft and the rotational speed of the output shaft to be synchronized, and complete the gear shifting.

[0007] According to the gear shifting control method provided by the present application, the duty cycle of the electromagnetic valve is determined based on the rotational speed of the input shaft and the rotational speed of the output shaft, comprising: determining the difference between the rotational speed of the input shaft and the rotational speed of the output shaft; acquiring the oil temperature of the gearbox of the vehicle; determining the proportional-integral-derivative control parameter of the vehicle in the current environment based on the oil temperature of the gearbox and the difference; and determining the duty cycle of the electromagnetic valve based on the proportional-integral-derivative control parameter.

[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 being the friction surface between the cone ring and the synchronization ring of the synchronizer; and performing wear compensation on the duty cycle of the solenoid valve based on the wear information to obtain the compensated duty cycle of the solenoid valve.

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

[0010] According to a shift control method provided by the present invention, the formula for calculating the actual synchronization slope is as follows:

[0011] ;

[0012] in, Indicates that the synchronizer is The synchronization slope at time t, Indicates that the synchronizer is The synchronization slope at time t, Indicates that the synchronizer is The synchronization slope at time t, Indicates that the synchronizer is The synchronization slope at time t, express coefficient, express coefficient, express coefficient, express coefficient, This represents the actual synchronous slope.

[0013] According to a shift control method provided by the present invention, based on the duty cycle of a solenoid valve, the solenoid valve is controlled to adjust the air intake of the shift cylinder to generate a shift force, thereby synchronizing the input shaft speed and the output shaft speed to complete the shift. The method includes: controlling 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, 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 method 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, thus completing the shift.

[0014] The application further provides a shift control device, comprising: an acquisition module, configured to acquire an input shaft speed and an output shaft speed; an electromagnetic valve duty cycle calculation module, configured to determine an electromagnetic valve duty cycle based on the input shaft speed and the output shaft speed; and a shift module, configured to control the electromagnetic valve to adjust an intake amount of a shift cylinder based on the electromagnetic valve duty cycle, so as to generate a shift force, adjust the input shaft speed and the output shaft speed to be synchronized, and complete a shift.

[0015] The application further provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements any of the above shift control methods when executing the computer program.

[0016] The application further provides a non-transitory computer readable storage medium, which stores a computer program, and the computer program is executable on a processor to implement any of the above shift control methods.

[0017] The application further provides a computer program product, comprising a computer program, and the computer program is executable on a processor to implement any of the above shift control methods.

[0018] The shift control method, device, equipment, storage medium and product provided by the application first determine the electromagnetic valve duty cycle according to the input shaft speed and the output shaft speed, and then control the electromagnetic valve to adjust the intake amount of the shift cylinder based on the electromagnetic valve duty cycle, so as to generate a shift force, adjust the input shaft speed and the output shaft speed to be synchronized, and complete a shift. Compared with the prior art, since the intake amount of the shift cylinder can be adjusted according to the electromagnetic valve duty cycle, the shift process is controllable, the shift impact caused by the rapid entry of gas into the shift cylinder in a short time can be avoided, the device damage caused by the shift impact is reduced, the service life of the synchronizer is prolonged, the accidental gear tooth noise is reduced, and the smoothness and comfort of vehicle driving are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the application or prior art, the following will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort.

[0020] Figure 1 is one of the flowcharts of the shift control method provided by the application.

[0021] Figure 2 is another flowchart of the shift control method provided by the application.

[0022] Figure 3 is a third flowchart of the shift control method provided by the application.

[0023] Figure 4 is a structural schematic diagram of a gear shift control device provided by the present application.

[0024] Figure 5 is a structural schematic diagram of an electronic device provided by the present application. DETAILED DESCRIPTION

[0025] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0026] It should be noted that, in the description of the present application, the terms "comprise", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of other identical elements in the process, method, article or device comprising the element. The terms "upper", "lower" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise specified and limited, the terms "mount", "connect", "connect" should be understood broadly, for example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] The terms "first", "second", and the like in the present disclosure are used to distinguish similar objects, and are not used to describe a particular 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 disclosure can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a class and do not limit the number of objects, 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 before and after are in a "or" relationship.

[0028] It should be noted that all actions of obtaining signals, information or data in the present disclosure are carried out in accordance with the corresponding data protection regulations and policies of the country where the device is located, and with the authorization of the owner of the corresponding device.

[0029] Please refer to Figure 1 , Figure 1 is one of the flowcharts of the shift control method provided by the present disclosure. In the present embodiment, the shift control method is applied to the transmission controller installed on the vehicle, and the shift control method comprises steps S110 to S130, and each step is as follows:

[0030] S110: obtaining the input shaft speed and the output shaft speed.

[0031] S120: determining the solenoid duty cycle based on the input shaft speed and the output shaft speed.

[0032] 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, and the PID controller can dynamically adjust and output the solenoid duty cycle (i.e. PWM duty cycle) according to the input shaft speed and the output shaft speed, so as to control the output of different shift forces.

[0033] Preferably, the synchronization performance of the current synchronizer can be calculated at the same time, and when the wear of the synchronizer is aggravated and the synchronization performance of the synchronizer is reduced to a certain degree, the PID controller can introduce corresponding wear compensation to make more precise adjustment to the solenoid duty cycle, so as to improve the accuracy of the solenoid duty cycle, and then accurately control the subsequent shift process.

[0034] S130: based on the solenoid duty cycle, controlling the solenoid to adjust the intake amount of the shift cylinder to generate a shift force, so as to adjust the synchronization of the input shaft speed and the output shaft speed, and complete the shift.

[0035] Specifically, in the embodiment, the 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, adjust the opening of the electromagnetic valve to change the intake amount of the shift cylinder, generate a corresponding shift force, adjust the input shaft speed and the output shaft speed to be synchronized, and complete the gear shifting.

[0036] Understandably, the synchronizer shift control valve can open different electromagnetic valve duty cycles according to the control signal output by the transmission controller, and different shift forces can be generated after aeration.

[0037] In the process of starting the shift, the PID controller in the synchronizer shift control unit calculates the difference between the input shaft speed and the output shaft speed, and the calculated difference is directly used to determine the duty cycle of the electromagnetic valve. Generally, when the calculated difference is large, the duty cycle of the electromagnetic valve is large; when the calculated difference is small, the duty cycle of the electromagnetic valve is small.

[0038] Alternatively, 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 control.

[0039] Because the performance of the transmission synchronizer varies at different temperatures, the two-dimensional linear interpolation module can calculate and output the proportional integral derivative control parameters (i.e., PID parameters) of the vehicle in the current environment according to the input transmission oil temperature and the difference between the input shaft speed and the output shaft speed, and then calculate the duty cycle of the electromagnetic valve according to the proportional integral derivative control parameters.

[0040] The two-dimensional linear interpolation module can output PID parameters to control the electromagnetic valve duty cycle to increase when the transmission 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 performance is low, to achieve rapid synchronization; 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 electromagnetic valve duty cycle to decrease appropriately, to achieve speed synchronization and complete the shift; when the real-time difference between the input shaft speed and the output shaft speed is small enough and less than a preset threshold, the electromagnetic valve duty cycle can be adjusted to 100% to complete the synchronous shift.

[0041] The shift control method provided by the embodiment determines the electromagnetic valve duty ratio according to the input shaft speed and the output shaft speed, and then controls the electromagnetic valve to adjust the intake amount of the shift cylinder based on the electromagnetic valve duty ratio, so as to generate a shift force and adjust the input shaft speed and the output shaft speed to be synchronized, thereby completing the shift. Compared with the prior art, the intake amount of the shift cylinder can be adjusted according to the electromagnetic valve duty ratio, so that the shift process is controllable, the shift impact caused by the rapid entry of gas into the shift cylinder in a short time can be avoided, the damage of devices caused by the shift impact is reduced, the service life of the synchronizer is prolonged, the accidental gear tooth noise is reduced, and the smoothness and comfort of vehicle driving are improved.

[0042] In some embodiments, based on the input shaft speed and the output shaft speed, the electromagnetic valve duty ratio is determined by determining the difference between the input shaft speed and the output shaft speed, obtaining the transmission oil temperature of the vehicle, determining the proportional-integral-derivative control parameter of the vehicle in the current environment based on the transmission oil temperature and the difference, and determining the electromagnetic valve duty ratio based on the proportional-integral-derivative control parameter.

[0043] It can be understood that, since the performance of the transmission synchronizer is different when it works at different temperatures, the influence of the transmission oil temperature needs to be considered additionally when the shift control of the synchronizer is performed.

[0044] Please refer to Figure 2 , Figure 2 is a second flowchart of the shift control method provided by the embodiment.

[0045] As Figure 2 shown, the input shaft speed and the output shaft speed can be collected according to the transmission position sensor and the transmission speed sensor, the transmission oil temperature of the vehicle can be collected through the transmission oil temperature sensor, and the data such as the input shaft speed, the output shaft speed and the transmission oil temperature are transmitted to the transmission controller; after the input shaft speed and the output shaft speed are determined, the input shaft speed and the output shaft speed are input into the PID controller in the synchronizer shift control unit, the PID controller can calculate the difference between the input shaft speed and the output shaft speed by using the two-dimensional linear interpolation module, and calculate and output the proportional-integral-derivative control parameter (i.e. PID parameter) of the vehicle in the current environment according to the input transmission oil temperature, the difference between the input shaft speed and the output shaft speed, and then calculate the electromagnetic valve duty ratio according to the proportional-integral-derivative control parameter.

[0046] The shift control method provided by the embodiment fully considers the influence of the transmission oil temperature on the synchronizer shift control process, introduces the transmission oil temperature in the calculation of the electromagnetic valve duty ratio, which can improve the accuracy of the calculation of the electromagnetic valve duty ratio, and is conducive to realizing the accurate control of the synchronizer shift process.

[0047] In some embodiments, after determining the solenoid valve duty cycle based on the input shaft speed and the output shaft speed, the process includes: obtaining a synchronization slope reference value of the synchronizer; determining the 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 being the friction surface between the conical ring and the synchronization ring of the synchronizer; and performing wear compensation on the solenoid valve duty cycle based on the wear information to obtain the compensated solenoid valve duty cycle.

[0048] During the use of a synchronizer, wear on the friction surfaces between the conical ring and the synchronizing ring can degrade the synchronizer's synchronization performance, potentially causing the solenoid valve's duty cycle adjustment to fail to achieve the desired effect. Therefore, the synchronizer's synchronization slope can be calculated to provide feedback on the wear condition of the friction surfaces between the conical ring and the synchronizing ring. This allows for wear compensation to be added during speed synchronization control based on the current wear condition of the friction surfaces, optimizing the solenoid valve's duty cycle adjustment and improving the synchronizer's synchronization control accuracy.

[0049] Specifically, a preset oil temperature reference value and a preset solenoid valve duty cycle reference value are selected. 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.

[0050] For example, if the preset oil temperature reference value is selected as 50℃ and the preset solenoid valve duty cycle reference value is 70%, and the synchronizer slope is calculated when the transmission oil temperature is 50℃ and the solenoid valve duty cycle is 70%, then the synchronizer slope under this condition is used as the synchronizer slope reference value.

[0051] Further, determine the actual synchronization slope of the synchronizer.

[0052] Specifically, assuming the synchronizer is in The synchronization slope at time is denoted as The formula for calculating the actual synchronization slope of the synchronizer is:

[0053] ;

[0054] in, Indicates that the synchronizer is The synchronization slope at time t, Indicates that the synchronizer is The synchronization slope at time t, Indicates that the synchronizer is The synchronization slope at time t, Indicates that the synchronizer is The synchronization slope at time t, express coefficient, express coefficient, a coefficient of a coefficient of a coefficient of

[0055] The actual synchronization slope of the synchronizer is measured at different times through multiple measurements, reflecting the wear of the friction surface between the cone ring and the synchronizer ring, and the wear of the friction surface can reflect the current synchronization performance of the synchronizer.

[0056] wherein, in the above formula, the coefficient and the filter order can be calibrated according to actual conditions.

[0057] Further, based on the synchronization slope reference value and the actual synchronization slope, the wear information of the friction surface is determined, and the wear compensation is performed on the electromagnetic valve duty cycle based on the wear information, to obtain the compensated electromagnetic valve duty cycle.

[0058] Generally, in an ideal case, the actual synchronization slope should be consistent with the synchronization slope reference value, but in actual cases, the wear of the friction surface between the cone ring and the synchronizer ring is inevitable, which will directly lead to errors between the actual synchronization slope and the synchronization slope reference value, and such errors will continuously expand as the synchronizer is used for a long time. Therefore, the wear information of the friction surface is determined according to the difference between the synchronization slope reference value and the actual synchronization slope, and the wear compensation is performed on the electromagnetic valve duty cycle based on the wear information, to obtain the compensated electromagnetic valve duty cycle.

[0059] Further, the intake amount of the gear shifting cylinder is controlled according to the compensated electromagnetic valve duty cycle, to generate a gear shifting force, so as to adjust the input shaft speed and the output shaft speed to be synchronized, and complete gear shifting.

[0060] The gear shifting control method provided in the embodiment fully considers the influence of the wear of the friction surface between the cone ring and the synchronizer ring on the synchronization performance of the synchronizer, introduces wear compensation in the calculation of the electromagnetic valve duty cycle to optimize the adjustment effect of the electromagnetic valve duty cycle, and can effectively improve the precision of the synchronization control of the synchronizer.

[0061] In some embodiments, the synchronization slope reference value of the synchronizer is obtained, including: determining a preset oil temperature reference value and a preset electromagnetic valve duty cycle reference value; and determining the synchronization slope reference value of the synchronizer when the oil temperature of the gearbox is the preset oil temperature reference value and the electromagnetic valve duty cycle is the preset electromagnetic valve duty cycle reference value.

[0062] ​​​For example, the preset oil temperature reference value is selected as 50 DEG C, and the preset electromagnetic valve duty cycle reference value is selected as 70%; in the case that the gearbox oil temperature is 50 DEG C and the electromagnetic valve duty cycle is 70%, the synchronizer synchronizer slope at this time is calculated, and the synchronizer synchronizer slope at this time is taken as the synchronizer synchronizer slope reference value.

[0063] In some embodiments, the calculation formula of the actual synchronizer slope is:

[0064] ;

[0065] Wherein, represents the synchronizer synchronizer slope at the time of , represents the synchronizer synchronizer slope at the time of , represents the synchronizer synchronizer slope at the time of , represents the synchronizer synchronizer slope at the time of , represents the synchronizer synchronizer slope at the time of , represents the coefficient of , represents the coefficient of , represents the coefficient of , represents the coefficient of , represents the coefficient of , represents the coefficient of , represents the coefficient of , represents the coefficient of , represents the coefficient of , represents the coefficient of , represents the actual synchronizer slope.

[0066] In some embodiments, based on the electromagnetic valve duty cycle, the electromagnetic valve is controlled to adjust the intake amount of the shift cylinder to generate a shift force, so as to adjust the input shaft speed and the output shaft speed to be synchronized, and complete the shift, including: based on the electromagnetic valve duty cycle, the electromagnetic valve is controlled to adjust the intake amount of the shift cylinder to generate a shift force, so as to adjust the input shaft speed and the output shaft speed, and judge 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, and complete the shift.

[0067] Please refer to Figure 3 , Figure 3 is a third flowchart of the shift control method provided by the application.

[0068] As Figure 3 ​As 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 input shaft speed, the output shaft speed and the gearbox oil temperature and other data are transmitted to the gearbox controller; the PID controller in the synchronizer shift control unit calculates the difference between the input shaft speed and the output shaft speed by using a two-dimensional linear interpolation module, calculates and outputs the proportional integral differential control parameter (i.e. the PID parameter) of the vehicle in the current environment according to the input gearbox oil temperature and the difference between the input shaft speed and the output shaft speed, and then calculates the electromagnetic valve duty cycle according to the proportional integral differential control parameter, and controls the intake amount of the shift cylinder of the electromagnetic valve based on the electromagnetic valve duty cycle to generate a shift force, so as to adjust the input shaft speed and the output shaft speed, and to judge whether the adjusted input shaft speed and the adjusted output shaft speed are synchronized.

[0069] If the adjusted input shaft speed and the adjusted output shaft speed are not synchronized, the step of collecting the input shaft speed and the output shaft speed is returned, and the calculation and adjustment of the electromagnetic valve duty cycle are continuously performed according to the real-time collected gearbox oil temperature, input shaft speed and output shaft speed, so as to realize the control of the synchronizer shift based on the electromagnetic valve duty cycle, until the input shaft speed and the output shaft speed are synchronized, and the shift is completed.

[0070] 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 an AMT control strategy, and converted into corresponding code and burned into the gearbox controller, so that the gearbox controller can realize the synchronous control of the synchronizer speed according to the burned code, and complete the shift operation.

[0071] The shift control method provided in the embodiment dynamically controls the opening degree of the electromagnetic valve according to the difference between the input shaft speed and the output shaft speed by using the PID parameter, so as to effectively control the synchronizer shift process; for the problem of the decline of the synchronization performance caused by the wear of the friction surface between the synchronizer cone ring and the synchronizer ring, the current wear condition is evaluated by the real-time calculation of the synchronization slope, and the wear compensation is performed based on the wear condition, so as to improve the accuracy of the electromagnetic valve duty cycle, and then the shift process of the synchronizer can be accurately controlled based on the electromagnetic valve duty cycle, so as to avoid the shift impact and abnormal sound, prolong the service life of the synchronizer, and improve the shift quality.

[0072] The application further provides a shift control device. Please refer to Figure 4 , Figure 4 is a structural schematic diagram of the shift control device provided by the application. In the embodiment, the shift control device comprises an acquisition module 410, an electromagnetic valve duty cycle calculation module 420 and a shift module 430.

[0073] The acquisition module 410 is used for acquiring the input shaft speed and the output shaft speed.

[0074] The solenoid duty ratio calculation module 420 is configured to determine a solenoid duty ratio based on the input shaft speed and the output shaft speed.

[0075] The shift module 430 is configured to control the solenoid to adjust the intake amount of the shift cylinder based on the solenoid duty ratio, so as to generate a shift force, adjust the input shaft speed and the output shaft speed to be synchronized, and complete the shift.

[0076] In some embodiments, the solenoid duty ratio calculation module 420 is configured to determine a difference between the input shaft speed and the output shaft speed, obtain a transmission oil temperature of the vehicle, determine a proportional-integral-derivative control parameter of the vehicle in a current environment based on the transmission oil temperature and the difference, and determine the solenoid duty ratio based on the proportional-integral-derivative control parameter.

[0077] In some embodiments, the solenoid duty ratio calculation module 420 is configured to obtain a synchronization slope reference value of the synchronizer, determine an actual synchronization slope of the synchronizer, determine wear information of a friction surface based on the synchronization slope reference value and the actual synchronization slope, the friction surface being a friction surface between a cone ring and a synchronizer ring of the synchronizer, and perform wear compensation on the solenoid duty ratio based on the wear information to obtain a compensated solenoid duty ratio.

[0078] In some embodiments, the solenoid duty ratio calculation module 420 is configured to determine a preset oil temperature reference value and a preset solenoid duty ratio reference value, and determine a synchronization slope reference value of the synchronizer when the transmission oil temperature is the preset oil temperature reference value and the solenoid duty ratio is the preset solenoid duty ratio reference value.

[0079] In some embodiments, a calculation formula of the actual synchronization slope is as follows:

[0080] ;

[0081] wherein, represents the synchronization slope of the synchronizer at a time point, represents the synchronization slope of the synchronizer at a time point, represents the synchronization slope of the synchronizer at a time point, represents the synchronization slope of the synchronizer at a time point, represents the synchronization slope of the synchronizer at a time point, represents the synchronization slope of the synchronizer at a time point, represents the synchronization slope of the synchronizer at a time point, represents a coefficient of, represents a coefficient of, represents a coefficient of, represents a coefficient of, represents a coefficient of, represents a coefficient of, represents a coefficient of, represents a coefficient of, represents a coefficient of, Actual synchronization slope.

[0082] In some embodiments, the shift module 430 is configured to control the electromagnetic valve to adjust the intake amount of the shift cylinder based on the duty cycle of the electromagnetic valve, to generate a shift force, to adjust the input shaft speed and the output shaft speed, and to 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, and complete the shift.

[0083] The present application also provides an electronic device. Figure 5 is a structural schematic diagram of the electronic device provided by the present application, as Figure 5 shown, the electronic device can include a processor 510, a communications interface 520, a memory 530, and a communications bus 540, wherein the processor 510, the communications interface 520, and the memory 530 communicate with each other through the communications bus 540. The processor 510 can invoke the logical instructions in the memory 530 to execute the shift control method.

[0084] In addition, the logical instructions in the memory 530 described above can be implemented in the form of a software functional unit and sold or used as a standalone product, which can be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the parts that contribute to the prior art or parts of the technical solutions can be embodied in the form of a software product, which is stored in a storage medium and includes a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0085] The present application also provides a non-transitory computer-readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the shift control method provided by the above-mentioned methods.

[0086] The present application 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, and the computer program is executed by a processor, and the computer can execute the shift control method provided by the above-mentioned methods.

[0087] The apparatus embodiments described above are merely illustrative, wherein the units described as separated components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed to multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment scheme according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0088] Through the description of the above embodiments, those skilled in the art can clearly understand that the embodiments can be realized by means of software and the necessary general hardware platform, and of course can also be realized by hardware. Based on such understanding, the above technical solutions can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

[0089] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A gear shifting control method, characterized in that, include: Obtain the input shaft speed and output shaft speed; The duty cycle of the solenoid valve is determined 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 shifting force, thereby synchronizing the speed of the input shaft and the speed of the output shaft to complete the shifting. After determining the solenoid valve duty cycle based on the input shaft speed and the output shaft speed, the process includes: Obtain the synchronization slope reference value of the synchronizer; Determine the 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 conical 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 the compensated duty cycle of the solenoid valve.

2. The shift control method according to claim 1, characterized in that, Determining the solenoid valve duty cycle based on the input shaft speed and the output shaft speed includes: 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-derivative control parameters of the vehicle under the current environment; The duty cycle of the solenoid valve is determined based on the proportional-integral-derivative control parameters.

3. The shift control method according to claim 1, characterized in that, The process of obtaining the synchronization slope reference value of the synchronizer includes: Determine the preset oil temperature reference value and the 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.

4. The shift control method according to claim 1, characterized in that, The formula for calculating the actual synchronization slope is: y(k)=b0x(k)+b1x(k-1)+b2x(k-2)+…b n x(k-n); Where x(k) represents the synchronization slope of the synchronizer at time k, x(k-1) represents the synchronization slope of the synchronizer at time k-1, x(k-2) represents the synchronization slope of the synchronizer at time k-2, x(kn) represents the synchronization slope of the synchronizer at time kn, b0 represents the coefficient of x(k), b1 represents the coefficient of x(k-1), b2 represents the coefficient of x(k-2), and b n Let x(kn) represent the coefficients, and y(k) represent the actual synchronization slope.

5. The shift control method according to claim 1, characterized in that, The step of controlling the solenoid valve to adjust the air intake of the shift cylinder based on the solenoid valve duty cycle to generate shifting force, and adjusting the input shaft speed and the output shaft speed to synchronize and complete the shifting, includes: 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 shifting force, thereby adjusting the speed of the input shaft and the speed of the output shaft, 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, 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, and the gear shift is completed.

6. A gear shifting control device, characterized in that, include: The acquisition module is used to acquire the input shaft speed and the output shaft speed; The solenoid valve duty cycle calculation module is 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, so as to generate shift force, adjust the speed of the input shaft and the speed of the output shaft to synchronize, and complete the shift. The solenoid valve duty cycle calculation module is used to obtain the synchronization slope reference value of the synchronizer; determine the actual synchronization slope of the synchronizer; and 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, wear compensation is performed on the duty cycle of the solenoid valve to obtain the compensated duty cycle of the solenoid valve.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the shift control method as described in any one of claims 1 to 5.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the shift control method as described in any one of claims 1 to 5.

9. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the shift control method as described in any one of claims 1 to 5.

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