A gearbox shift control method, system, device, and storage medium

Abstract

The application discloses a gearbox shift control method, system, device and storage medium, and relates to the field of auxiliary driving, and can accurately control the oil filling amount and ensure that the clutch has sufficient oil supply during the shift process, thereby avoiding the shift roughness caused by the insufficient oil. In the overlapping stage, the actual clutch oil pressure is controlled according to the vehicle load and torque data to complete the shift, so that the smoothness during the shift process can be ensured, and the shift failure or vehicle shaking caused by improper oil pressure control can be avoided. Through comparison between the actual clutch oil pressure and the preset required oil pressure, the pre-filling time compensation value at the next shift is determined, so that the shift strategy can be further optimized, and the shift delay or impact caused by improper pre-filling time setting can be reduced.

Description

Technical Field

[0001] This invention relates to the field of driver assistance technology, and specifically to a transmission shift control method, system, device, and storage medium. Background Technology

[0002] CVT (Continuously Variable Transmission) achieves continuously variable speeds by using a constantly changing gear ratio, revolutionizing the fixed gear ratio mode of traditional transmissions. The core of a CVT lies in its power transmission mechanism, which uses a pair of conical pulleys and a steel belt or chain to achieve smooth power delivery. This design allows CVT transmissions to provide a smooth acceleration experience during driving, eliminating the jerky shifts of traditional transmissions. CVT transmissions can deliver power smoothly based on the driver's intentions and vehicle driving conditions.

[0003] While CVT transmissions are favored for their smoothness and fuel economy, they also present some challenges in practical use. First, CVT transmissions may slip under high torque, especially during rapid acceleration or overtaking, potentially leading to belt breakage or conical pulley wear, thus affecting the transmission's lifespan. Second, the oil supply lines to the solenoid valves in CVT transmissions are prone to leakage due to wear. Insufficient oil supply directly affects the solenoid valve's oil pressure regulation, resulting in limited or abnormal acceleration performance, or even acceleration shuddering and abnormal noises. For vehicles with variable operating conditions, such as large agricultural tractors, CVT transmissions frequently shift gears. Prolonged operation can cause changes in the electrical parameters of the clutch solenoid valves, and there are also inconsistencies in solenoid valve compatibility. This means that the same parameters may not be applicable to all transmissions, leading to insufficient clutch lubrication or pressure fluctuations in some vehicles. Ultimately, this manifests as jerking, uncomfortable shift points, and an inability to fully realize the advantages of continuously variable transmissions. Summary of the Invention

[0004] The main objective of this invention is to provide a transmission shift control method, system, device, and storage medium. By adjusting the current based on real-time monitoring of the clutch oil pressure, the oil filling amount can be precisely controlled to ensure sufficient oil supply to the clutch during shifting, avoiding shifting difficulties caused by insufficient oil. When the oil filling amount reaches a preset value and the pre-charge time ends, the current is controlled to a set pressure to maintain the required current, ensuring stable oil pressure in the clutch during shifting and reducing shock during the shifting process. During the overlap phase, the actual clutch oil pressure is controlled based on vehicle load and torque data to complete the shift, ensuring smoothness during the shifting process and avoiding shifting failures or vehicle vibrations caused by improper oil pressure control. By comparing the actual clutch oil pressure with the preset required oil pressure, the pre-charge time compensation value for the next shift is determined, further optimizing the shifting strategy and reducing shift delays or shocks caused by improper pre-charge time settings.

[0005] To achieve the above objectives, the embodiments of this application provide the following technical solutions:

[0006] According to a first aspect of the embodiments of this application, a gearbox shift control method is provided, the method comprising:

[0007] In response to a shift command, the solenoid valve is opened, allowing oil to flow into the clutch;

[0008] The current is adjusted based on the real-time monitored clutch oil pressure to control the amount of oil supplied.

[0009] When the oil filling amount reaches the preset value and the pre-filling time ends, the control current is adjusted to the set pressure to maintain the required current.

[0010] Upon entering the overlap phase, the actual oil pressure of the clutch is controlled based on the vehicle load and torque data to complete the gear shift;

[0011] The pre-charge time compensation value for the next gear shift is determined by comparing the actual oil pressure of the clutch with the preset required oil pressure.

[0012] Optionally, adjusting the current based on real-time monitored clutch oil pressure to control the oil filling amount includes:

[0013] Real-time monitoring of clutch oil pressure;

[0014] When the clutch oil pressure reaches the preset pre-charge pressure value, the current passing through the solenoid valve is controlled according to the preset pre-charge current curve, so that the current is adjusted from the current pulse state to the pre-charge demand current, thereby controlling the amount of oil charged.

[0015] Optionally, controlling the actual clutch oil pressure based on vehicle load and torque data to complete gear shifting includes:

[0016] Based on the monitored vehicle load and torque data, and referring to the pre-set pressure rise curve, the required oil pressure change curve for the clutch during the overlap phase is determined.

[0017] Adjust the oil flow direction to the clutch according to the oil pressure change curve to ensure that the actual oil pressure of the clutch changes according to the oil pressure change curve.

[0018] Clutch engagement is achieved by controlling the current to the solenoid valve;

[0019] The shift is complete when the clutch is fully engaged and the actual oil pressure of the clutch stabilizes at the required level.

[0020] Optionally, determining the pre-charge time compensation value for the next gear shift by comparing the actual clutch oil pressure with the preset required oil pressure includes:

[0021] The pressure integral ratio at each time point is obtained based on the actual oil pressure of the clutch and the preset required oil pressure.

[0022] Compare the minimum value among all pressure integral ratios with a preset threshold;

[0023] If the minimum value is less than the preset threshold, the precharge time compensation value is determined for the next gear shift.

[0024] Optionally, the pressure integral ratio at each time point is obtained based on the actual oil pressure of the clutch and the preset required oil pressure, including:

[0025] Real-time monitoring of actual clutch oil pressure;

[0026] The actual oil pressure of the clutch is integrated with time to obtain the actual oil pressure integral.

[0027] The ratio of the actual oil pressure integral to the demand pressure integral at each time point is calculated to obtain the pressure integral ratio at each time point; the demand pressure integral is the integral of the oil pressure change over time as preset according to the clutch attributes and shifting requirements.

[0028] Optionally, determining the precharge time compensation value for the next gear shift includes:

[0029] If the actual oil pressure of the clutch is lower than the required pressure, calculate the precharge time compensation value that needs to be extended.

[0030] If the actual oil pressure of the clutch is higher than the required pressure, calculate the precharge time compensation value that needs to be shortened.

[0031] Optionally, opening the solenoid valve to allow oil to flow into the clutch includes:

[0032] During the pre-charge phase, a current pulse is applied to open the solenoid valve, allowing oil to flow into the clutch and generating oil pressure.

[0033] According to a second aspect of the embodiments of this application, a gearbox shift control system is provided, the system comprising:

[0034] The activation module is used to activate the solenoid valve in response to a shift command, allowing oil to flow into the clutch.

[0035] The oil filling control module is used to adjust the current according to the real-time monitored clutch oil pressure in order to control the oil filling amount.

[0036] The current control module is used to control the current to maintain the required current at a set pressure when the oil filling amount reaches a preset value and the pre-charging time ends.

[0037] The overlap module is used to enter the overlap phase. It controls the actual oil pressure of the clutch based on the vehicle load and torque data to complete the gear shift.

[0038] The compensation value calculation module is used to determine the pre-charge time compensation value for the next gear shift by comparing the actual oil pressure of the clutch with the preset required oil pressure.

[0039] According to a third aspect of the present application, an electronic device is provided, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method described in the first aspect above.

[0040] According to a fourth aspect of the embodiments of this application, a computer-readable storage medium is provided having computer-readable instructions stored thereon, which can be executed by a processor to implement the method described in the first aspect above.

[0041] In summary, this application provides a transmission shift control method, system, device, and storage medium. By adjusting the current based on real-time monitored clutch oil pressure, the oil filling amount can be precisely controlled, ensuring sufficient oil supply to the clutch during shifting and avoiding shifting difficulties due to insufficient oil. When the oil filling amount reaches a preset value and the pre-charge time ends, the current is controlled to a set pressure to maintain the required current, ensuring stable oil pressure during clutch shifting and reducing shock during the shifting process. During the overlap phase, the actual clutch oil pressure is controlled based on vehicle load and torque data to complete the shift, ensuring smoothness during the shifting process and avoiding shifting failures or vehicle vibrations due to improper oil pressure control. By comparing the actual clutch oil pressure with the preset required oil pressure, the pre-charge time compensation value for the next shift is determined, further optimizing the shifting strategy and reducing shift delays or shocks caused by improper pre-charge time settings. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0043] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0044] Figure 1 A flowchart of a gearbox shift control method provided in this application embodiment;

[0045] Figure 2 This is a schematic diagram of pressure changes during gear shifting provided in an embodiment of this application;

[0046] Figure 3 A flowchart illustrating the shifting strategy provided in this application embodiment;

[0047] Figure 4 This is a schematic diagram of a gearbox shift control system provided in an embodiment of this application;

[0048] Figure 5 This paper shows a structural diagram of an electronic device provided in an embodiment of this application;

[0049] Figure 6 A diagram of a computer-readable storage medium provided in an embodiment of this application is shown.

[0050] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0052] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0053] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0055] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0056] Figure 1 This application illustrates a gearbox shift control method according to an embodiment of the present application. The method includes:

[0057] Step 101: In response to the shift command, open the solenoid valve to allow oil to flow into the clutch;

[0058] Step 102: Adjust the current according to the real-time monitored clutch oil pressure to control the oil filling amount;

[0059] Step 103: When the oil filling amount reaches the preset value and the pre-filling time ends, control the current to the set pressure to maintain the required current;

[0060] Step 104: Enter the overlap phase, control the actual oil pressure of the clutch according to the vehicle load and torque data, and complete the gear shift;

[0061] Step 105: Determine the pre-charge time compensation value for the next gear shift by comparing the actual oil pressure of the clutch with the preset required oil pressure.

[0062] In one possible implementation, step 101, opening the solenoid valve to allow oil to flow into the clutch, includes:

[0063] During the pre-charge phase, a current pulse is applied to open the solenoid valve, allowing oil to flow into the clutch and generating oil pressure.

[0064] By controlling the opening of the solenoid valve with an electrical pulse, a rapid response to clutch oil pressure can be achieved, which is crucial for improving shift speed and reducing shift delay. The application of the electrical pulse can precisely control the opening degree of the solenoid valve, thereby precisely controlling the amount of oil flowing into the clutch and ensuring accurate oil pressure establishment.

[0065] Imagine a car driving on a city road. The driver needs to shift from a low gear to a high gear to accelerate and overtake. In step 101, when the shift command is issued, the system quickly enters the pre-charge phase. At this time, by applying a current pulse, the solenoid valve opens rapidly, and oil flows quickly into the clutch, quickly building up the required oil pressure. This rapid response ensures that the shift can be completed quickly and smoothly, with the driver feeling almost no shock or delay, thus enabling safer and more efficient overtaking maneuvers. Simultaneously, this fast and precise control also helps reduce fuel waste caused by improper shifting, improving the vehicle's overall fuel economy. Furthermore, because the shock during shifting is reduced, clutch wear is correspondingly reduced, thereby lowering maintenance costs and extending the clutch's lifespan.

[0066] In one possible implementation, step 102, adjusting the current based on real-time monitored clutch oil pressure to control the oil filling amount, includes:

[0067] Real-time monitoring of clutch oil pressure; when the clutch oil pressure reaches the preset pre-charge pressure value, the current passing through the solenoid valve is controlled according to the preset pre-charge current curve, so that the current is adjusted from the current pulse state to the pre-charge demand current, thereby controlling the amount of oil added.

[0068] By monitoring the clutch oil pressure in real time and adjusting the current according to the preset pre-charge pressure value, the oil pressure can be precisely controlled to reach the required level, avoiding excessively high or low pressure. By controlling the current according to the preset pre-charge current curve, the current can be smoothly adjusted from the current pulse state to the pre-charge demand current, which helps optimize the oil filling process, reduce oil waste, and shorten the system response time.

[0069] In step 102, the system monitors the clutch oil pressure in real time. When the oil pressure reaches the preset pre-charge pressure value, the system adjusts the current through the solenoid valve according to the preset pre-charge current curve. This means that the current smoothly adjusts from the initial current pulse state to the pre-charge required current to control the amount of oil charged. This control ensures precise establishment of clutch oil pressure, making the gear shifting process quick and smooth, with the driver feeling almost no impact. Furthermore, this precise control helps reduce fuel waste caused by improper oil pressure control, improving the overall fuel economy of the vehicle. Simultaneously, by reducing oil pressure fluctuations and clutch wear, clutch maintenance costs are reduced, and its service life is extended.

[0070] In one possible implementation, step 104, controlling the actual clutch oil pressure based on vehicle load and torque data to complete gear shifting, includes:

[0071] Based on the monitored vehicle load and torque data, and referring to the pre-set pressure rise curve, the required oil pressure change curve for the clutch during the overlap phase is determined; the oil flow to the clutch is adjusted according to the oil pressure change curve to ensure that the actual oil pressure of the clutch changes according to the oil pressure change curve; the clutch is engaged by controlling the current of the solenoid valve; when the clutch is fully engaged and the actual oil pressure of the clutch stabilizes at the required level, the gear shift is completed.

[0072] Dynamically adjusting the hydraulic pressure based on vehicle load and torque data reduces shocks and vibrations during gear shifts, improving driving comfort. Precise control of the hydraulic pressure variation curve ensures that the actual clutch hydraulic pressure matches the required pressure, improving shift accuracy. Controlling the current to the solenoid valve achieves clutch engagement, ensuring continuous and efficient power transmission.

[0073] In step 104, the system monitors vehicle load and torque data and, referring to a pre-set pressure rise curve, determines the required oil pressure change curve for the clutch during the overlap phase. The system adjusts the oil flow to the clutch according to this oil pressure change curve, ensuring the actual clutch oil pressure changes according to the predetermined curve. By controlling the current of the solenoid valve, the system achieves clutch engagement. The shift is completed when the clutch is fully engaged and the actual oil pressure stabilizes at the required level. For example, if the vehicle is climbing a hill under heavy load, the system recognizes the need for higher oil pressure to ensure smooth clutch engagement. The system adjusts the oil pressure change curve based on load and torque data and achieves this oil pressure change by controlling the current of the solenoid valve. This ensures smoothness and accuracy of the shifting process even under varying loads, avoiding shift failures or vehicle vibration due to insufficient oil pressure. This dynamic oil pressure adjustment method helps improve driving comfort, reduce energy loss, improve fuel economy, and extend clutch life.

[0074] In one possible implementation, step 105, determining the pre-charge time compensation value for the next gear shift based on the actual clutch oil pressure and the preset required oil pressure, includes:

[0075] The pressure integral ratio at each time point is obtained based on the actual oil pressure of the clutch and the preset required oil pressure; the minimum value among all pressure integral ratios is compared with a preset threshold; if the minimum value is less than the preset threshold, the precharge time compensation value for the next gear shift is determined.

[0076] In one possible implementation, the pressure integral ratio at each time point is obtained based on the actual oil pressure of the clutch and the preset required oil pressure, including:

[0077] The actual oil pressure of the clutch is monitored in real time; the actual oil pressure is integrated with time to obtain the actual oil pressure integral; the ratio of the actual oil pressure integral to the required pressure integral at each time point is calculated to obtain the pressure integral ratio at each time point; the required pressure integral is the integral of the oil pressure change over time as preset according to the clutch attributes and shifting requirements.

[0078] In one possible implementation, determining the precharge time compensation value for the next gear shift includes:

[0079] If the actual oil pressure of the clutch is lower than the required pressure, calculate the precharge time compensation value that needs to be extended; if the actual oil pressure of the clutch is higher than the required pressure, calculate the precharge time compensation value that needs to be shortened.

[0080] By calculating the pressure integral ratio and comparing the minimum value with a preset threshold, it can be determined whether the pre-charge time needs adjustment, thereby optimizing the shifting process. Dynamically adjusting the pre-charge time based on the difference between the actual and required oil pressure can reduce shifting delays and improve shifting efficiency. Precise control of the pre-charge time can reduce shifting shocks caused by oil pressure mismatch, improving driving comfort.

[0081] In step 105, the system monitors the actual clutch oil pressure in real time and compares it with the preset required oil pressure. The system integrates the actual oil pressure with time to obtain the actual oil pressure integral, and calculates the ratio of the actual oil pressure integral to the required pressure integral at each time point, i.e., the pressure integral ratio. If the minimum pressure integral ratio at a certain time point is found to be lower than a preset threshold, the system determines the compensation value for extending the precharge time during the next gear shift. For example, if the system detects that the actual clutch oil pressure is consistently lower than the required pressure during a certain gear shift cycle, the system calculates the compensation value for extending the precharge time to ensure that the clutch oil pressure can reach the required pressure more quickly during the next gear shift, reducing shift shock. Conversely, if the actual oil pressure is higher than the required pressure, the system calculates the compensation value for shortening the precharge time to avoid shift delay caused by excessive oil pressure. This method of dynamically adjusting the precharge time helps to achieve smoother and more efficient gear shifts under different driving conditions, improving driving comfort and overall vehicle performance.

[0082] By improving the clutch oil filling control strategy of the transmission, the smoothness and comfort of gear shifting are enhanced. The transmission shifting control method provided in this application embodiment will be described in detail below with reference to the accompanying drawings.

[0083] Figure 2 A pressure-time (Pt) plot is displayed to compare the pressure changes during CVT transmission shifts using the new control strategy (solid line) and the original control strategy (dashed line). The horizontal axis (t) represents time, showing the time series during the shift process. The vertical axis (P) represents pressure, showing the pressure changes of the clutch during the shift process. Specifically, it includes the following stages:

[0084] 1. Pre-charge phase: At the start of gear shifting, the new control strategy rapidly opens the solenoid valve by applying a large current pulse, quickly building up pressure. This is represented by the solid line rising rapidly in the graph. In contrast, the original control strategy's rise is relatively slower.

[0085] 2. Pressure Holding Phase: After reaching the preset pressure, the new control strategy reduces the current to the normal pre-charge requirement, and the pressure remains stable. This is represented in the diagram as the solid line remaining horizontal after reaching a certain height. The original control strategy experienced pressure fluctuations during this phase.

[0086] 3. OverLap Phase: After the pre-charge phase, the new control strategy gradually reduces the current to enter the pressure holding phase, reducing pressure fluctuations. This is represented in the diagram as the solid line slowly decreasing after the pre-charge phase. The original control strategy experienced a significant pressure drop during this phase, which could affect shift smoothness.

[0087] 4. Rapid Compression Phase: After the OverLap phase, the new control strategy adjusts the pressure rise curve based on the vehicle load and torque to achieve smooth torque transition. This is represented in the diagram as the solid line rising again after the OverLap phase. The original control strategy might have resulted in pressure rising too quickly or too slowly during this phase.

[0088] As can be seen from the new control strategy provided in this application embodiment, pressure is rapidly established during the pre-charge phase, reducing delays during gear shifts; pressure fluctuations are reduced by gradually decreasing the current during the pressure holding phase; and smoother torque transitions are achieved through dynamic adjustments during the OverLap and rapid compression phases. This has significant advantages in improving the comfort and responsiveness of CVT transmissions during gear shifts. The control strategy for each phase is described below:

[0089] Phase 1: Pulse-type oil filling during clutch pre-charging.

[0090] Step 1: At the start of a gear shift, a large current pulse is applied during the clutch pre-charge phase to quickly open the solenoid valve. The purpose is to rapidly build up the required oil pressure.

[0091] Step 2: Actual pressure detection: When the actual pressure reaches the preset pre-charge pressure value, the current will return from the high current pulse state to the normal pre-charge demand current.

[0092] Phase Two: Dynamic Adjustment of Pre-charged Data.

[0093] Step 1: Pre-charge flow detection: During the pre-charge stage, the system will detect the actual fuel flow in real time.

[0094] Step 2: Precharge time calculation: When the actual traffic reaches the preset precharge traffic, the precharge phase ends and the precharge time is calculated.

[0095] The third stage: the pressure holding stage, during which the current decreases slowly.

[0096] After the pre-charge phase ends, the current will slowly decrease to the current required for the pressure holding phase. This slow decrease helps reduce pressure fluctuations caused by the solenoid valve closing too quickly.

[0097] Phase 4: The pressure rise curve of the OverLap phase.

[0098] During the OverLap phase, the pressure rise curve is obtained by referring to a table based on the vehicle's load and torque. This phase is to ensure that the clutch can engage smoothly during gear shifts.

[0099] Phase 5: Calculation of the ratio of actual pressure to demand pressure.

[0100] Step 1: Ratio Calculation: During the OverLap and rapid compaction phases, calculate the ratio of the actual pressure integral to the required pressure integral.

[0101] The actual pressure integral refers to the integral of the actual clutch oil pressure change over time during gear shifting. This integral is calculated by integrating the oil pressure value over time using a pressure sensor that monitors the oil pressure in real time. It reflects the actual oil pressure changes experienced by the clutch during gear shifting. The demand pressure integral refers to the integral of the ideal oil pressure, preset according to the clutch design and shifting requirements, over time. This demand pressure integral is calculated based on the clutch's operating characteristics and shifting strategy, resulting in an ideal oil pressure change curve. The system calculates the ratio of the actual pressure integral to the demand pressure integral. This ratio is used to assess the degree of matching between the actual and ideal oil pressures. If the ratio deviates from 1, it indicates a discrepancy between the actual and demand oil pressures.

[0102] Step 2: Minimum value detection: If the minimum value of this ratio is less than the set threshold, the system will compensate for the oil filling time to adapt to different working conditions.

[0103] If the minimum value of the ratio is less than a set threshold, the system will perform intelligent compensation. This may involve adjusting the precharge time to optimize shift smoothness. For example, if the actual pressure is lower than the required pressure, the system may extend the precharge time to ensure the clutch receives sufficient oil pressure; if the actual pressure is higher than the required pressure, the system may shorten the precharge time to avoid excessive oil pressure.

[0104] Figure 3 The implementation steps of the new control strategy are described in detail, including starting gear shift, clutch pre-charging, pressure and flow detection, determination of pre-charging time, current adjustment during the pressure holding phase, calculation of the pressure rise curve during the OverLap phase, and compensation for oil filling time based on the ratio.

[0105] Step 1: During gear shifting, the clutch needs to be pre-filled with oil in preparation for engagement. At this time, the system applies a large current pulse to quickly open the solenoid valve, rapidly establishing the required oil pressure.

[0106] Step 2: The system will check whether the actual pressure has reached the preset value. If the actual pressure has reached the preset value (marked as "Y"), proceed to the next step; if not (marked as "N"), the pre-charge strategy needs to be adjusted.

[0107] Step 3: Once the actual pressure reaches the preset value, the clutch precharge current will drop to the normal precharge demand current.

[0108] Step 4: The system checks whether the actual pre-charged flow has reached the preset flow. If it has (marked as "Y"), proceed to the next step; if not, the pre-charged flow needs to be adjusted.

[0109] Step 5: Once the actual pre-charged data volume reaches the preset data volume, the system will determine the pre-charge time.

[0110] Step 6: After the pre-charge phase ends, the clutch pre-charge ends, and the current slowly decreases to the current required for the pressure holding phase to reduce pressure fluctuations.

[0111] Step 7: In the OverLap stage, the pressure rise curve is obtained by looking up a table based on the vehicle load and torque.

[0112] Step 8: Calculate the ratio of the actual pressure integral to the demand pressure integral for OverLap and subsequent stages.

[0113] Step 9: Check if the minimum value of this ratio is less than the set threshold. If it is (marked as "Y"), the pre-charge time needs to be compensated; if not (marked as "N"), the process ends, completing the intelligent control of clutch oil filling during gear shifting.

[0114] This flowchart illustrates a closed-loop control system that monitors and adjusts in real time to ensure that the clutch oil pressure and flow in the CVT transmission meet dynamically changing requirements during gear shifts, thereby improving shift smoothness and comfort. This method effectively solves the shift jerking problem caused by insufficient or fluctuating oil pressure, enhancing the driving experience.

[0115] By applying a large current pulse during the clutch pre-charge phase and gradually reducing the current after pre-charge, pressure fluctuations are effectively reduced. Simultaneously, by dynamically adjusting the pre-charge time and adjusting the pressure rise curve according to vehicle load and torque, intelligent control of clutch oil filling under different operating conditions is achieved, thereby improving the shifting comfort of the CVT transmission.

[0116] In summary, this application provides a transmission shift control method. By adjusting the current based on real-time monitored clutch oil pressure, the oil filling amount can be precisely controlled to ensure sufficient oil supply to the clutch during shifting, avoiding shifting difficulties caused by insufficient oil. When the oil filling amount reaches a preset value and the pre-charge time ends, the current is controlled to a set pressure to maintain the required current, ensuring stable oil pressure during shifting and reducing shock during the shifting process. During the overlap phase, the actual clutch oil pressure is controlled based on vehicle load and torque data to complete the shift, ensuring smoothness during the shifting process and avoiding shifting failures or vehicle vibrations caused by improper oil pressure control. By comparing the actual clutch oil pressure with the preset required oil pressure, the pre-charge time compensation value for the next shift is determined, further optimizing the shifting strategy and reducing shift delays or shocks caused by improper pre-charge time settings.

[0117] Based on the same technical concept, embodiments of this application also provide a gearbox shift control system, such as... Figure 4 As shown, the system includes:

[0118] The opening module 401 is used to open the solenoid valve in response to the shift command, so that oil flows into the clutch.

[0119] The oil filling quantity control module 402 is used to adjust the current according to the real-time monitored clutch oil pressure in order to control the oil filling quantity;

[0120] The current control module 403 is used to control the current to a set pressure to maintain the required current when the oil filling amount reaches a preset value and the pre-charging time ends.

[0121] The overlap module 404 is used to enter the overlap phase and control the actual oil pressure of the clutch according to the vehicle load and torque data to complete the gear shift.

[0122] The compensation value calculation module 405 is used to determine the pre-charge time compensation value for the next gear shift by comparing the actual oil pressure of the clutch with the preset required oil pressure.

[0123] This application also provides an electronic device corresponding to the method provided in the foregoing embodiments. Please refer to... Figure 5 The diagram illustrates an electronic device provided by some embodiments of this application. The electronic device 20 may include: a processor 200, a memory 201, a bus 202, and a communication interface 203, wherein the processor 200, the communication interface 203, and the memory 201 are connected via the bus 202; the memory 201 stores a computer program that can run on the processor 200, and when the processor 200 runs the computer program, it executes the method provided by any of the foregoing embodiments of this application.

[0124] The memory 201 may include high-speed random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Communication between this system network element and at least one other network element is achieved through at least one physical port (which can be wired or wireless), such as the Internet, wide area network, local area network, or metropolitan area network.

[0125] Bus 202 can be an ISA bus, PCI bus, or EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. The memory 201 is used to store programs. After receiving an execution instruction, the processor 200 executes the program. The method disclosed in any of the foregoing embodiments of this application can be applied to the processor 200, or implemented by the processor 200.

[0126] The processor 200 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of the processor 200 or by instructions in software form. The processor 200 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules may reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 201. The processor 200 reads the information in memory 201 and, in conjunction with its hardware, completes the steps of the above method.

[0127] The electronic devices and methods provided in the embodiments of this application are based on the same inventive concept and have the same beneficial effects as the methods they employ, operate, or implement.

[0128] This application also provides a computer-readable storage medium corresponding to the method provided in the foregoing embodiments. Please refer to... Figure 6The computer-readable storage medium shown is an optical disc 30, on which a computer program (i.e., a program product) is stored, which, when run by a processor, executes the methods provided in any of the foregoing embodiments.

[0129] It should be noted that examples of the computer-readable storage medium may also include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other optical and magnetic storage media, which will not be elaborated here.

[0130] The computer-readable storage medium provided in the above embodiments of this application and the method provided in the embodiments of this application are based on the same inventive concept and have the same beneficial effects as the methods adopted, run or implemented by the applications stored therein.

[0131] It should be noted that the above embodiments are illustrative of this application and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. This application can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0132] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0133] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A transmission shift control method characterized by, The method includes: In response to a shift command, the solenoid valve is opened, allowing oil to flow into the clutch; The current is adjusted based on the real-time monitored clutch oil pressure to control the amount of oil supplied. When the oil filling amount reaches the preset value and the pre-filling time ends, the control current is adjusted to the set pressure to maintain the required current. Upon entering the overlap phase, the actual oil pressure of the clutch is controlled based on the vehicle load and torque data to complete the gear shift; The pre-charge time compensation value for the next gear shift is determined by comparing the actual clutch oil pressure with the preset required oil pressure. This determination includes: obtaining the pressure integral ratio at each time point based on the actual clutch oil pressure and the preset required oil pressure; comparing the minimum value among all pressure integral ratios with a preset threshold; and determining the pre-charge time compensation value for the next gear shift if the minimum value is less than the preset threshold.

2. The method of claim 1, wherein, The method of adjusting the current based on real-time monitored clutch oil pressure to control the oil filling amount includes: Real-time monitoring of clutch oil pressure; When the clutch oil pressure reaches the preset pre-charge pressure value, the current passing through the solenoid valve is controlled according to the preset pre-charge current curve, so that the current is adjusted from the current pulse state to the pre-charge demand current, thereby controlling the amount of oil charged.

3. The method of claim 1, wherein, The process of controlling the actual clutch oil pressure based on vehicle load and torque data to complete gear shifting includes: Based on the monitored vehicle load and torque data, and referring to the pre-set pressure rise curve, the required oil pressure change curve for the clutch during the overlap phase is determined. Adjust the oil flow direction to the clutch according to the oil pressure change curve to ensure that the actual oil pressure of the clutch changes according to the oil pressure change curve. Clutch engagement is achieved by controlling the current to the solenoid valve; The shift is complete when the clutch is fully engaged and the actual oil pressure of the clutch stabilizes at the required level.

4. The method of claim 1, wherein, The pressure integral ratio at each time point is obtained based on the actual oil pressure of the clutch and the preset required oil pressure, including: Real-time monitoring of actual clutch oil pressure; The actual oil pressure of the clutch is integrated with time to obtain the actual oil pressure integral. The ratio of the actual oil pressure integral to the demand pressure integral at each time point is calculated to obtain the pressure integral ratio at each time point; the demand pressure integral is the integral of the oil pressure change over time as preset according to the clutch attributes and shifting requirements.

5. The method of claim 4, wherein, The determination of the precharge time compensation value for the next gear shift includes: If the actual oil pressure of the clutch is lower than the required pressure, calculate the precharge time compensation value that needs to be extended. If the actual oil pressure of the clutch is higher than the required pressure, calculate the precharge time compensation value that needs to be shortened.

6. The method of claim 1, wherein, The opening of the solenoid valve, allowing oil to flow into the clutch, includes: During the pre-charge phase, a current pulse is applied to open the solenoid valve, allowing oil to flow into the clutch and generating oil pressure.

7. A gearbox shift control system characterized by, The system includes: The activation module is used to activate the solenoid valve in response to a shift command, allowing oil to flow into the clutch. The oil filling control module is used to adjust the current according to the real-time monitored clutch oil pressure in order to control the oil filling amount. The current control module is used to control the current to maintain the required current at a set pressure when the oil filling amount reaches a preset value and the pre-charging time ends. The overlap module is used to enter the overlap phase. It controls the actual oil pressure of the clutch based on the vehicle load and torque data to complete the gear shift. The compensation value calculation module is used to determine the pre-charge time compensation value for the next gear shift by comparing the actual clutch oil pressure with the preset required oil pressure. This determination includes: obtaining the pressure integral ratio at each time point based on the actual clutch oil pressure and the preset required oil pressure; comparing the minimum value among all pressure integral ratios with a preset threshold; and determining the pre-charge time compensation value for the next gear shift if the minimum value is less than the preset threshold.

8. An electronic device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the method as claimed in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, It stores computer-readable instructions that can be executed by a processor to implement the method as described in any one of claims 1-6.

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