Symmetrical arrangement parameter-adjustable intelligent control system for synchronizers

Abstract

The invention provides an intelligent control system with symmetrically arranged synchronizers and adjustable parameters. The intelligent control system comprises a tractor, an airborne displayer, an intelligent armrest box controller, a proportional reversing electromagnetic valve, a power gear shifting gearbox, a horizontal acceleration sensor and a synchronizer synchronizing ring. Two proportional reversing electromagnetic valves are symmetrically arranged on the two sides of a synchronizing ring of the synchronizer, valve elements are provided with gear shifting blocks, and the proportional reversing electromagnetic valves and the gear shifting blocks obtain the same PWM voltage control signals and cooperatively shift the synchronizing ring to achieve power gear shifting. The speed ratios of the two sides of the power synchronizer are different, the running speeds of the whole machine are different, and the time lengths required by gear shifting synchronization of the whole machine synchronizer are different; the synchronization durations of gear shifting, gear increasing and gear reducing between the synchronizers are different; the input rotating speed of a power gear shifting gearbox can greatly influence the gear shifting smoothness of a power synchronizer, in order to reduce the gear shifting impact between gears of the power synchronizer, all gear shifting parameters need to be controlled by an intelligent armrest box controller in a coordinated mode, and initial debugging gear shifting parameters are deployed and confirmed through an onboard displayer.

Description

Technical Field

[0001] The present application relates to a tractor power shift transmission control system, and in particular, to an intelligent control system for a power synchronizer of a tractor power shift transmission. Background Art

[0002] As the core power equipment in agricultural production, tractors need to adapt to multi-regional and multi-operating conditions. The design of their power shift gearboxes is crucial to fuel economy and smooth operation. The current mainstream power shift gearbox adopts a split structure of main and auxiliary gearboxes: the main gearbox is responsible for shifting within the section or continuously variable speed change, and its transmission ratio is distributed in a geometric progression, with dense gears, small speed differences, low shift shock and good smoothness; the auxiliary gearbox is responsible for shifting between sections, and the transmission ratio is distributed in an arithmetic progression, with dispersed gears and significant speed ratio differences, resulting in large shift shocks and prominent vibration and noise. In order to improve the shifting quality of the auxiliary gearbox, the existing technology mostly adopts synchronizer shifting and power synchronizer shifting schemes, but there are still the following technical bottlenecks:

[0003] 1. Strong dependence on operation and heavy burden on the driver. Traditional synchronizer shifting requires the driver to manually operate the shift lever to complete the "shift-shift" action. Although skilled drivers can optimize the operation rhythm through experience to improve comfort, this method requires strict operator skills, long-term operation can easily cause fatigue, and the shifting efficiency is significantly affected by fluctuations in human factors, making it difficult to adapt to complex working conditions.

[0004] 2. The shifting parameters are rigid and lack adaptability. The existing power synchronizer shifting systems generally use hydraulic or pneumatic power-assisted shifting technology. Although it shortens the shifting time, it does not dynamically match the impact of the gear ratio, vehicle speed and powertrain speed difference on the shifting process. For example, when shifting between the auxiliary transmission sections, excessive speed ratio differences will cause violent vibration and noise at the moment of synchronizer ring engagement. Long-term use can easily cause synchronizer tooth surface wear, fork shaft deformation and other faults, and the maintenance cost is high. In addition, the unified power-assisted parameters cannot adapt to different load and terrain conditions, and the smoothness of the shifting is difficult to guarantee.

[0005] 3. Mechanical structure design defects and low reliability. The shift control device of the auxiliary transmission is mostly concentrated on the top of the box, and the shift fork is driven by the shift fork shaft to push the synchronizer ring to shift gears. However, due to the large transmission ratio and high torque conditions, the distance between the synchronizer ring shaft and the shift fork shaft is too large, resulting in the following problems:

[0006] The flatness of the left and right shift knobs is difficult to adjust, and insufficient machining accuracy can easily cause gear shifting to fail.

[0007] The force point of the shifting head is far away from the fork shaft, the additional torque increases, and long-term use can easily lead to plastic deformation of the fork, which in turn causes the shifting phenomenon;

[0008] In order to compensate for the structural strength defects, the shift fork shaft and shift fork are forced to adopt a thick design, which makes the shifting operation cumbersome and the impact aggravated, seriously reducing the life of the transmission system.

[0009] In summary, the existing sub-transmission shifting technology has defects such as low intelligence, poor parameter adaptability, and insufficient mechanical reliability. There is an urgent need for an intelligent control system that can dynamically adjust shifting parameters, optimize the force structure, and reduce operation dependence, so as to improve shifting quality, extend component life, and improve driving experience. Summary of the invention

[0010] In view of the deficiencies in the prior art, the present invention aims to provide an intelligent control system with adjustable synchronizer symmetrical arrangement parameters to solve the problems raised in the above-mentioned background technology.

[0011] According to one aspect of the present application, a synchronizer symmetrically arranged parameter-adjustable intelligent control system comprises a tractor, an onboard display, an intelligent armrest box controller, a power shift gearbox, a horizontal acceleration sensor and a power synchronizer operating device, wherein the onboard display, the intelligent armrest box controller and the power shift gearbox are all installed on the tractor, and a power synchronizer operating device is installed inside the power shift gearbox, and the power synchronizer operating device comprises a proportional reversing solenoid valve, a shifting dial, a synchronizer synchronizing ring and an in-box mounting bracket, wherein the in-box mounting bracket is fixedly installed inside the power shift gearbox, and two proportional reversing solenoid valves are symmetrically installed on the in-box mounting bracket. solenoid valve, and the mounting bracket in the box can adjust the positions of the two symmetrically installed proportional reversing solenoid valves, the synchronizer synchronizing ring is arranged in the power shift gearbox, the shift dial head is installed on the valve core of each of the proportional reversing solenoid valves, and the two shift dial heads are symmetrically arranged and are clearance-matched with the outer ring groove of the synchronizer synchronizing ring, the valve core axes of the two symmetrically installed proportional reversing solenoid valves are coplanar with the synchronizer synchronizing ring axis, the center lines of the two symmetrically arranged shift dial heads are coplanar with the synchronizer synchronizing ring axis along the swept surface of the shifting stroke, and the horizontal acceleration sensor is installed in the upper and middle part of the rear side of the outer box body of the power shift gearbox.

[0012] Preferably, the onboard display is a human-computer interaction interface, and the onboard display communicates with the intelligent armrest box controller through a CAN bus module, and is used to set the initial debugging values ​​of the optimal powertrain speed, shift head thrust and synchronization time during the gear shifting process, and dynamically display the working status of the power shift transmission and the gear shift smoothness estimation.

[0013] Preferably, the intelligent armrest box controller communicates with the onboard display via a CAN bus module, and outputs the operating status of the power shift transmission and the shift smoothness estimation to the onboard display according to the calculation results of its internal power synchronizer control program.

[0014] Preferably, the intelligent armrest box controller communicates with the whole machine powertrain control module through the CAN bus module to obtain the powertrain speed and torque information, and outputs the target speed to the whole machine powertrain control module according to the calculation results of the power synchronizer control program in the intelligent armrest box controller to optimize the smoothness of the whole machine.

[0015] Preferably, the intelligent armrest box controller obtains the whole machine vibration simulation value output by the horizontal acceleration sensor through the input port, and after the target speed of the powertrain is reached and the transmission clutch is disconnected, it outputs a PWM numerical voltage control signal to the proportional reversing solenoid valve through the output port to adjust its opening degree and direction. The proportional reversing solenoid valve drives the shift dial along the opening direction and controls the position of the synchronizer synchronizing ring according to the opening degree to achieve gear shifting.

[0016] Preferably, the power synchronizer control program in the intelligent armrest box controller adopts an unsupervised deep learning method to calculate the optimal powertrain speed, shift head thrust and synchronization time at the moment of gear engagement based on the current powertrain speed, gear status and acceleration analog output by the horizontal acceleration sensor; the gear shift smoothness estimation is the weighted sum of the normalized shift time and the root mean square value of the horizontal vibration acceleration of the whole machine.

[0017] Preferably, the proportional reversing solenoid valve adjusts its opening degree and direction in steps according to the received PWM numerical voltage control signal and based on the principle of mechanical damping oscillator to control the gear shifting process.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. Symmetrical solenoid valve arrangement and dynamic adjustment: Two proportional reversing solenoid valves are symmetrically installed on the bracket inside the box, and the valve core axis is coplanar with the synchronizer ring axis, and the sweeping surface of the shift knob is coplanar with the synchronizer ring axis to ensure force symmetry. The spacing of the mounting bracket inside the box is adjustable to meet the assembly requirements of different types of gearboxes.

[0020] 2. Unsupervised deep learning control algorithm: The algorithm built into the smart armrest box controller does not require pre-labeled data. It can autonomously optimize the shift parameters through real-time collected speed, torque and vibration signals.

[0021] 3. Machine vibration suppression strategy: The gear shift smoothness estimation integrates the normalized gear shift time and the root mean square value of vibration acceleration, and the intelligent armrest box controller dynamically adjusts the parameter priority through weighted sum. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of an intelligent control system with adjustable synchronizer symmetrical arrangement parameters according to an embodiment of the present application.

[0023] Figure 2 It is a schematic diagram of the internal structure of a power shift transmission of an intelligent control system with symmetrically arranged synchronizers and adjustable parameters according to an embodiment of the present application.

[0024] Figure 3 It is a schematic diagram of the clearance fit between a shift knob and an outer ring groove of a synchronizer ring of an intelligent control system with adjustable synchronizer symmetrical arrangement parameters according to an embodiment of the present application.

[0025] Figure 4 It is a schematic diagram of the changing relationship between the shift head thrust and the synchronization time of an intelligent control system with adjustable synchronizer symmetrical arrangement parameters according to an embodiment of the present application.

[0026] Figure numerals: 1. Tractor; 2. Onboard display; 3. Intelligent armrest box controller; 4. Power shift gearbox; 5. Horizontal acceleration sensor; 6. Proportional reversing solenoid valve; 7. Shift dial; 8. Synchronizer ring; 9. Mounting bracket inside the box. DETAILED DESCRIPTION

[0027] In order to make the content of this application easier to understand, the technical solutions in the embodiments of this application will be described clearly and completely in conjunction with the drawings in the embodiments of this application. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the attached drawings. Figure 1 As used herein, the terms "inward" and "outward" refer to directions toward and away from, respectively, the geometric center of the particular component.

[0028] like Figure 1 to Figure 4As shown, an intelligent control system with symmetrically arranged synchronizers and adjustable parameters includes a tractor 1, an onboard display 2, an intelligent armrest box controller 3, a power shift gearbox 4, a horizontal acceleration sensor 5 and a power synchronizer operating device, and the onboard display 2, the intelligent armrest box controller 3 and the power shift gearbox 4 are all installed on the tractor 1. Specifically, the tractor 1 serves as a whole machine carrier, and the power shift gearbox 4 is integrated into its transmission system; the onboard display 2 serves as a human-computer interaction interface, and communicates with the intelligent armrest box controller 3 through the CAN bus to set shift parameters such as the optimal powertrain speed, the shift head thrust, and the initial value of the synchronization time, and to display the gearbox working status and the shift smoothness estimation in real time, such as the weighted sum of the normalized shift time and the root mean square value of the horizontal vibration acceleration; the power shift gearbox 4 is internally integrated with a power synchronizer operating device, including a proportional reversing solenoid valve 6 , a shifting head 7, a synchronizer synchronizing ring 8 and an in-box mounting bracket 9, the in-box mounting bracket 9 is fixedly mounted inside the power shift gearbox 4, two proportional reversing solenoid valves 6 are symmetrically mounted on the in-box mounting bracket 9, and the in-box mounting bracket 9 can adjust the positions of the two symmetrically mounted proportional reversing solenoid valves 6, a synchronizer synchronizing ring 8 is arranged in the power shift gearbox 4, a shifting head 7 is mounted on the valve core of each proportional reversing solenoid valve 6, and the two shifting heads 7 are symmetrically arranged and are both matched with the outer ring groove clearance of the synchronizer synchronizing ring 8 (such as Figure 3 As shown in the figure, the valve core axes of the two symmetrically installed proportional reversing solenoid valves 6 are coplanar with the synchronizer synchronization ring 8 axis, and the midlines of the two symmetrically arranged shifting heads 7 are coplanar with the synchronizer synchronization ring 8 axis along the sweeping surface of the shifting stroke. The horizontal acceleration sensor 5 is installed in the middle and upper part of the rear side of the external box of the power shift transmission 4, which is used to detect the horizontal vibration acceleration of the whole machine and transmit the analog signal to the smart armrest box controller 3; the smart armrest box controller 3 has a built-in power synchronizer control program, and communicates with the onboard display 2, the whole machine powertrain control module and the horizontal acceleration sensor 5 through the CAN bus. Its core functions include:

[0029] Output the operating status of the power shift transmission 4 and the shift smoothness estimation to the onboard display 2 according to the calculation results of its internal power synchronizer control program;

[0030] Obtain the real-time speed and torque information of the powertrain, and output the target speed to the powertrain control module of the whole machine according to the calculation results of the power synchronizer control program to optimize the smoothness of the whole machine;

[0031] The input port receives the whole machine vibration analog quantity output by the horizontal acceleration sensor 5, and after the target speed of the powertrain is reached and the transmission clutch is disconnected, the output port outputs a PWM numerical voltage control signal to the proportional reversing solenoid valve 6 to adjust its opening degree and direction, thereby causing the proportional reversing solenoid valve 6 to drive the shifting head 7 along the opening direction and control the position of the synchronizer synchro ring 8 according to the opening degree to achieve gear shifting;

[0032] The power synchronizer control program built into the intelligent armrest box controller 3 adopts an unsupervised deep learning algorithm to dynamically calculate the optimal powertrain speed, shift lever thrust and synchronization time (such as the current powertrain speed, gear position status and acceleration analog output by the horizontal acceleration sensor 5) at the time of gear engagement. Figure 4 shown), Figure 4 The size of the displacement on the middle vertical axis reflects the thrust of the shift knob 7, and the horizontal axis Δt=t3-t2 is the synchronization time;

[0033] The proportional reversing solenoid valve 6 adjusts its opening degree and direction in steps according to the received PWM numerical voltage control signal and based on the principle of mechanical damping oscillator to control the gear shifting process.

[0034] The shift control process is as follows:

[0035] 1. Parameter initialization: Set the initial shift parameters such as gear ratio and target speed range through the onboard display 2. The smart armrest box controller 3 recommends default values ​​based on historical data and working conditions. Initialization is completed after user confirmation.

[0036] 2. Gear shift triggering and data acquisition: When the driver triggers the gear shift command, the intelligent armrest box controller 3 obtains the current powertrain speed, torque and vibration data of the horizontal acceleration sensor 5 through the CAN bus.

[0037] 3. Dynamic parameter optimization: The intelligent armrest box controller 3 uses an unsupervised deep learning model to calculate the optimal shift parameters in real time based on the current gear state, speed ratio difference and vibration data. For example, if a large speed ratio difference is detected, such as shifting between auxiliary transmission sections, the synchronization time is extended to reduce the impact; if the root mean square value of the horizontal vibration acceleration exceeds the threshold, the shift knob thrust is increased to shorten the synchronization time.

[0038] 4. PWM signal output and shift execution: The intelligent armrest box controller 3 outputs the same PWM voltage signal to the two symmetrical proportional reversing solenoid valves 6, driving the valve core to move in the specified direction and opening. The shifting head 7 synchronously shifts the synchronizer ring 8 under the drive of the solenoid valve, and adjusts the displacement step by step through the principle of mechanical damping oscillator. Figure 4 As shown, the ordinate is thrust and the abscissa is synchronization time, ensuring a smooth shifting process.

[0039] 5. Feedback and adaptive adjustment: After the gear shift is completed, the intelligent armrest box controller 3 updates the weight parameters of the deep learning model according to the actual gear shift time, vibration data and powertrain speed deviation, and optimizes the subsequent gear shift strategy.

[0040] In summary, the advantages of this application are as follows:

[0041] 1. Two proportional reversing solenoid valves 6 are symmetrically mounted on the mounting bracket 9 in the box, and the valve core axis is coplanar with the synchronizer ring 8 axis, and the sweeping surface of the shift knob 7 is coplanar with the synchronizer ring axis to ensure force symmetry. The spacing of the mounting bracket 9 in the box is adjustable to meet the assembly requirements of different types of gearboxes.

[0042] 2. The algorithm built into the smart armrest box controller 3 does not require pre-labeled data, and automatically optimizes the shift parameters through real-time acquisition of speed, torque and vibration signals. For example, the model identifies the optimal shift mode under different working conditions through cluster analysis and establishes a parameter mapping relationship.

[0043] 3. The gear shift smoothness estimation integrates the normalized gear shift time and the root mean square value of the vibration acceleration, and the intelligent armrest box controller 3 dynamically adjusts the parameter priority through weighted summation. For example, it prioritizes shortening the gear shift time under high-speed conditions and reducing vibration under heavy-load conditions.

[0044] The above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application are described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, without departing from the spirit and scope defined by the claims of the present application.

Claims

1. An intelligent control system with adjustable synchronizer symmetrical arrangement parameters, characterized in that: The invention comprises a tractor (1), an onboard display (2), an intelligent armrest box controller (3), a power shift gearbox (4), a horizontal acceleration sensor (5) and a power synchronizer operating device. The onboard display (2), the intelligent armrest box controller (3) and the power shift gearbox (4) are all installed on the tractor (1). The power synchronizer operating device is installed inside the power shift gearbox (4). The power synchronizer operating device comprises a proportional reversing solenoid valve (6), a shifting head (7), a synchronizer synchronizing ring (8) and an in-box mounting bracket (9). The in-box mounting bracket (9) is fixedly installed inside the power shift gearbox (4). Two proportional reversing solenoid valves (6) are symmetrically installed on the in-box mounting bracket (9). The mounting bracket (9) is capable of adjusting the positions of two symmetrically mounted proportional reversing solenoid valves (6). The synchronizer synchronizing ring (8) is arranged in the power shift transmission (4). The shifting dial head (7) is installed on the valve core of each proportional reversing solenoid valve (6), and the two shifting dial heads (7) are symmetrically arranged and are both clearance-matched with the outer ring groove of the synchronizer synchronizing ring (8). The valve core axes of the two symmetrically mounted proportional reversing solenoid valves (6) are coplanar with the axis of the synchronizer synchronizing ring (8). The center lines of the two symmetrically arranged shifting dial heads (7) are coplanar with the axis of the synchronizer synchronizing ring (8) along the swept surface of the shifting stroke. The horizontal acceleration sensor (5) is installed in the middle and upper part of the rear side of the outer casing of the power shift transmission (4).

2. The intelligent control system with adjustable synchronizer symmetrical arrangement parameters according to claim 1, characterized in that: The onboard display (2) is a human-machine interaction interface. The onboard display (2) communicates with the intelligent armrest box controller (3) via a CAN bus module and is used to set the optimal powertrain speed, the thrust of the shift knob (7) and the initial debugging value of the synchronization time during the shifting process, and dynamically display the working state of the power shift transmission (4) and the shifting smoothness evaluation.

3. The intelligent control system with adjustable synchronizer symmetrical arrangement parameters according to claim 1, characterized in that: The intelligent armrest box controller (3) communicates with the onboard display (2) via a CAN bus module, and outputs the operating status of the power shift transmission (4) and an estimated shift smoothness to the onboard display (2) based on the calculation results of its internal power synchronizer control program.

4. The intelligent control system with adjustable synchronizer symmetrical arrangement parameters according to claim 3, characterized in that: The intelligent armrest box controller (3) communicates with the whole machine powertrain control module via the CAN bus module to obtain the powertrain speed and torque information, and outputs the target speed to the whole machine powertrain control module according to the calculation result of the power synchronizer control program in the intelligent armrest box controller (3) to optimize the smoothness of the whole machine.

5. The intelligent control system with adjustable synchronizer symmetrical arrangement parameters according to claim 1, characterized in that: The intelligent armrest box controller (3) obtains the whole machine vibration simulation output by the horizontal acceleration sensor (5) through the input port, and after the target speed of the powertrain is achieved and the transmission clutch is disconnected, outputs a PWM numerical voltage control signal to the proportional reversing solenoid valve (6) through the output port to adjust its opening degree and direction. The proportional reversing solenoid valve (6) drives the shifting head (7) along the opening direction and controls the position of the synchronizer synchronizing ring (8) according to the opening degree to achieve gear shifting.

6. The intelligent control system with adjustable synchronizer symmetrical arrangement parameters according to claim 3, characterized in that: The power synchronizer control program in the intelligent armrest box controller (3) adopts an unsupervised deep learning method to calculate the optimal powertrain speed, shift knob (7) thrust and synchronization time at the time of gear engagement based on the current powertrain speed, gear position state and acceleration analog output by the horizontal acceleration sensor (5); the gear shift smoothness estimation is the weighted sum of the normalized gear shift time and the root mean square value of the horizontal vibration acceleration of the whole machine.

7. The intelligent control system with adjustable synchronizer symmetrical arrangement parameters according to claim 1, characterized in that: The proportional reversing solenoid valve (6) adjusts its opening degree and direction in steps according to the received PWM numerical voltage control signal and based on the principle of mechanical damping oscillator to control the gear shifting process.

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