Automatic transmission gear shifting control method and control device and vehicle with automatic transmission gear shifting control method and control device

Abstract

The invention discloses an automatic transmission gear shifting control method and device and a vehicle with the automatic transmission gear shifting control method and device. The control method comprises the steps that a speed signal is collected, and a gear shifting signal is obtained according to the speed signal; whether the gear shifting signal reaches the gear shifting range of the gear shifting curve or not is judged, if not, the gear shifting mode is not started, corresponding signals continue to be collected till the gear shifting signal reaches the corresponding gear shifting range, and an upshift or downshift instruction is sent out; and a gear shifting mode is entered, the TCU outputs the driving current of the corresponding gear electromagnetic valve, the current gear clutch is controlled to be separated, and the target gear clutch is controlled to be combined. In the invention, through closed-loop control based on the rotating speed signal, the dynamic response speed of the system can be improved, the gear shifting impact is reduced, the gear shifting quality is optimized, the workload of a driver is greatly reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile clutches, and further to an automatic transmission shift control method, a control device and a vehicle thereof. Background Art

[0002] At present, automatic shifting technology is gradually being applied in engineering machinery vehicles. Generally, automatic shifting is judged by detecting signals such as throttle opening and output speed. During the shifting process, a fixed clutch oil pressure control curve is executed, that is, the controller algorithm is generally open-loop adjustment, which will produce a more obvious impact when shifting. At the same time, due to the imperfect fault diagnosis mechanism, when the clutch slips and other problems occur, the fault location and diagnosis functions cannot be realized. Due to the above defects, the current automatic shifting controller is not superior to the manual shifting mode in some scenarios. Summary of the invention

[0003] In view of the above technical problems, the purpose of the present invention is to provide an automatic transmission shift control method, a control device and a vehicle thereof, which can improve the system dynamic response speed, reduce the shift shock, optimize the shift quality, greatly reduce the driver's workload and improve work efficiency through closed-loop control based on the speed signal.

[0004] In order to achieve the above object, the present invention provides an automatic transmission shift control method, comprising the steps of:

[0005] Collect speed signals, and obtain shift signals according to the speed signals;

[0006] Determine whether the shift signal reaches the shift range of the shift curve. If not, do not enter the shift mode and continue to collect corresponding signals until the shift signal reaches the corresponding shift range, and issue an upshift or downshift command.

[0007] When entering the gear shift mode, the TCU outputs the driving current of the corresponding gear solenoid valve, controls the current gear clutch to disengage, and controls the target gear clutch to engage.

[0008] In some implementations, the collecting of the speed signal and obtaining the shift signal according to the speed signal specifically includes the following steps:

[0009] A first speed sensor is arranged at the torque converter pump wheel, and a second speed sensor is arranged at the turbine. The first speed sensor collects a speed signal of the torque converter pump wheel, and the second speed sensor collects a speed signal of the turbine. A shift signal is obtained according to the speed signal of the torque converter pump wheel and the speed signal of the turbine.

[0010] In some embodiments, the steps are further included:

[0011] The main oil pressure signal and temperature signal of the gearbox are collected, and the shift signal is obtained by combining the speed signal of the torque converter pump wheel and the speed signal of the turbine. The vehicle driving condition, shift condition and clutch working state are judged, and the shift signal is obtained. According to the shift curve, it is judged whether the gearbox enters the shift mode.

[0012] In some embodiments, the steps are further included:

[0013] The TCU monitors the front and rear speed signals of each clutch friction plate through the first speed sensor and the second speed sensor. The actual speed signal enters the TCU. The TCU determines the degree of engagement between the target clutch and the current gear clutch during the gear shifting process, calculates the error between the actual and expected clutch oil pressure curves, and adjusts the drive current output to the solenoid valve in the power shift transmission through PI control and nonlinear control, thereby adjusting the oil pressure of each clutch in the power shift transmission.

[0014] In some embodiments, the shift mode is entered, the TCU outputs the driving current of the corresponding gear solenoid valve, controls the current gear clutch to be disengaged, and controls the target gear clutch to be engaged, specifically including the steps of:

[0015] Solenoid valve pre-start, low-frequency vibration pre-moves the target gear solenoid valve, so that it enters a low-amplitude vibration state from a relatively static state of the valve core, improving the response speed of the subsequent control stage;

[0016] The target gear clutch is quickly filled with fluid, and the target gear clutch piston is pushed to move toward the friction plate at the fastest speed to eliminate the gap between the piston and the friction plate. The filling time is controlled to reach the preset value, and then the target gear clutch pre-presses the friction plate to eliminate the gap between the friction plates of the target gear clutch, and the oil pressure reaches the preset value; the original gear is released and the pressure is maintained, and the original gear clutch is reduced to an appropriate torque transmission pressure value to reduce power interruption during the gear shifting process;

[0017] The target gear clutch is torqued and gradually pressed until the actual gear ratio of the transmission reaches the preset value, and the original gear clutch is disengaged and pressure is released;

[0018] The target gear clutch pressure is locked and pulled up, rising rapidly to the preset value;

[0019] Complete the corresponding gear shifting operation, exit the gear shifting mode, and the gear shifting is completed.

[0020] In some embodiments, the steps are further included:

[0021] A third speed sensor is arranged at the intermediate gear chain of the gearbox, and a fourth speed sensor is arranged at the output shaft. The second speed sensor collects the speed signal of the turbine in real time, the third speed sensor collects the speed signal of the intermediate gear chain of the gearbox in real time, and the fourth speed sensor collects the speed signal of the output shaft in real time. When the clutch slips, the clutch fault is diagnosed by comparing the actual transmission ratios of each gear with the theoretical values.

[0022] According to another aspect of the present invention, the present invention further provides an automatic transmission shift control device, comprising:

[0023] An acquisition module is used to acquire a speed signal and obtain a shift signal according to the speed signal;

[0024] A judgment module is used to judge whether the shift signal reaches the shift range of the shift curve. If not, the shift mode is not entered, and the corresponding signal is continuously collected until the shift signal reaches the corresponding shift range, and an upshift or downshift command is issued;

[0025] The shift module is used to enter the shift mode. The TCU outputs the driving current of the corresponding gear solenoid valve to control the current gear clutch to disengage and the target gear clutch to engage.

[0026] According to another aspect of the present invention, the present invention further provides an electronic device, including a processor and a storage medium;

[0027] The storage medium is used to store instructions;

[0028] The processor is used to operate according to the instructions to execute the steps of any one of the above methods.

[0029] According to another aspect of the present invention, the present invention further provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of any one of the above methods when executed by a processor.

[0030] According to another aspect of the present invention, the present invention further provides a vehicle, comprising:

[0031] An on-vehicle electronic device, the on-vehicle electronic device being used to implement any one of the above-mentioned automatic transmission shift control methods;

[0032] a processor, the processor running a program, and when the program is running, the data output from the on-board electronic device executes the steps of any one of the above-mentioned automatic transmission shift control methods;

[0033] A storage medium is used to store a program, which, when running, executes the steps of any one of the above-mentioned automatic transmission shift control methods for data output from an on-board electronic device.

[0034] Compared with the prior art, the automatic transmission shift control method, control device and vehicle provided by the present invention have at least one of the following beneficial effects:

[0035] In the present invention, through closed-loop control based on the speed signal, the dynamic response speed of the system can be improved, the impact of gear shifting can be reduced, the quality of gear shifting can be optimized, the workload of the driver can be greatly reduced, and the work efficiency can be improved; by monitoring multiple speed information and calculating the speed ratio of each gear, accurate clutch fault positioning can be achieved, and self-learning dynamic correction of clutch control parameters can be performed; by setting the controller as a flexible and customizable software framework, and designing control software modules with different functions for different types of engineering machinery, and integrating them in the software architecture, the maintenance and repair cost of the gearbox controller is low, the versatility is good, and the flexibility is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0037] Figure 1 is a flow chart of an automatic transmission shift control method according to a preferred embodiment of the present invention;

[0038] Figure 2 is a transmission shifting flow chart of a preferred embodiment of the present invention;

[0039] Figure 3 It is a schematic diagram of the installation structure of the first rotation speed sensor and the second rotation speed sensor in the preferred embodiment of the present invention;

[0040] Figure 4 It is a schematic diagram of the installation structure of the third rotation speed sensor and the fourth rotation speed sensor of the preferred embodiment of the present invention;

[0041] Figure 5 is a transmission shift control connection diagram of a preferred embodiment of the present invention;

[0042] Figure 6 It is a communication connection diagram of a vehicle controller according to a preferred embodiment of the present invention.

[0043] Description of Figure Numbers:

[0044] TCU1, power shift transmission 2, speed sensor 3, first speed sensor 31, second speed sensor 32, third speed sensor 33, fourth speed sensor 34, VCU4, MCU5, accelerator pedal 6, shift handle 7. DETAILED DESCRIPTION

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0046] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0047] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0048] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0050] In one embodiment, the reference specification Figure 1 The present invention provides an automatic transmission shift control method, comprising the steps of:

[0051] Collect speed signals, and obtain shift signals according to the speed signals;

[0052] Determine whether the shift signal reaches the shift range of the shift curve. If not, do not enter the shift mode and continue to collect corresponding signals until the shift signal reaches the corresponding shift range, and issue an upshift or downshift command.

[0053] When entering the gear shift mode, the TCU outputs the driving current of the corresponding gear solenoid valve, controls the current gear clutch to disengage, and controls the target gear clutch to engage.

[0054] Specifically, refer to the attached manual Figure 3The speed sensor 3 is provided to collect the speed signal. The speed sensor 3 includes a first speed sensor 31 and a second speed sensor 32. The first speed sensor 31 is provided at the torque converter pump wheel, and the second speed sensor 32 is provided at the turbine. The first speed sensor 31 collects the speed signal of the torque converter pump wheel, and the second speed sensor 32 collects the speed signal of the turbine. The shift signal is obtained according to the speed signal of the torque converter pump wheel and the speed signal of the turbine.

[0055] Furthermore, the main oil pressure signal and temperature signal of the gearbox are collected, and the shift signal is obtained by combining the speed signal of the torque converter pump wheel and the speed signal of the turbine. The vehicle driving condition, the shifting condition and the clutch working state are judged, and the shift signal is obtained. According to the shift curve, it is judged whether the gearbox enters the shift mode. The speed signal of the torque converter pump wheel and the speed signal of the turbine can be used as the basis for TCU dual-parameter shifting. Compared with single-parameter shifting, the shifting process is more timely, accurate, stable and rapid. When the shifting parameters reach the calibrated shifting upshift or downshifting range, the TCU enters the shifting mode, issues a shifting command, controls the solenoid valve to act, the current gear clutch is disengaged, and the target gear clutch is engaged.

[0056] The TCU monitors the front and rear speed signals of each clutch friction plate through the first speed sensor and the second speed sensor. The actual speed signal enters the TCU. The TCU determines the degree of engagement between the target clutch and the current gear clutch during the gear shifting process, calculates the error between the actual and expected clutch oil pressure curves, and adjusts the drive current output to the solenoid valve in the power shift transmission through PI control and nonlinear control, thereby adjusting the oil pressure of each clutch in the power shift transmission to achieve a better gear shift control effect.

[0057] In one embodiment, the reference specification Figure 2 The present invention provides an automatic transmission shift control method, comprising the steps of:

[0058] During vehicle driving, the gearbox TCU obtains the shift signal, that is, the speed signal obtained from the speed sensor installed at the pump wheel and turbine on the torque converter, and determines whether the gearbox enters the shift mode according to the shift curve;

[0059] According to the shift curve, if the shift signal does not reach the corresponding shift range, the shift mode will not be entered, and the TCU will not issue a command, and the corresponding signal will continue to be collected until the shift signal reaches the corresponding shift range. The TCU will make a judgment and issue an upshift or downshift command to enter the shift mode;

[0060] After entering the shift mode, the TCU outputs the driving current of the corresponding gear solenoid valve, controls the current gear clutch to disengage, and controls the target gear clutch to engage. It is specifically divided into the following stages:

[0061] In the first stage, the solenoid valve is pre-started, and the target gear solenoid valve is pre-moved by low-frequency vibration, so that the valve core enters a low-amplitude vibration state from a relatively static state, thereby improving the response speed of the subsequent control stage;

[0062] In the second stage, the target gear clutch is quickly filled with fluid, and the target gear clutch piston is pushed towards the friction plate at the fastest speed to eliminate the gap between the piston and the friction plate. The filling time is controlled to reach the preset value, and then the target gear clutch pre-presses the friction plate to eliminate the gap between the friction plates of the target gear clutch, and the oil pressure reaches the preset value; the original gear is released and the pressure is maintained, and the original gear clutch is reduced to an appropriate torque transmission pressure value to reduce power interruption during the gear shifting process;

[0063] In the third stage, the target gear clutch is torqued and gradually pressed until the actual gear ratio of the transmission reaches the preset value, and the original gear clutch is disengaged and pressure is released;

[0064] In the fourth stage, the clutch pressure of the target gear is locked and pulled up, and it rises rapidly to reach the preset value;

[0065] Complete the corresponding gear shifting operation, exit the gear shifting mode, and the gear shifting is completed.

[0066] Reference Manual Attached Figure 4 During the shifting process, the speed sensor 3 collects the speed signals of the front and rear friction plates of the clutch in real time, enters the TCU1 for processing, and after PI control and nonlinear control, the output enters the solenoid valve driving current of the power shift transmission 2, and then adjusts the clutch oil pressure in the power shift transmission, achieving a control effect in which the error between the clutch shift oil pressure and the expected oil pressure curve approaches zero in the first stage to the fourth stage.

[0067] In one embodiment, the reference specification Figure 4 The present invention provides an automatic transmission shift control method, which further includes the steps of:

[0068] The speed sensor 3 includes a third speed sensor 33 and a fourth speed sensor 34. The third speed sensor 33 is arranged at the intermediate gear chain of the gearbox, and the fourth speed sensor 34 is arranged at the output shaft. The second speed sensor 32 collects the speed signal of the turbine in real time, the third speed sensor 33 collects the speed signal of the intermediate gear chain of the gearbox in real time, and the fourth speed sensor 33 collects the speed signal of the output shaft in real time. When the clutch slips, the clutch fault is diagnosed by comparing the actual transmission ratio of each gear with the theoretical value.

[0069] In this embodiment, the TCU controller is integrated with a fault diagnosis function. During vehicle driving, the TCU collects speed signals from the first speed sensor, the second speed sensor, and the third speed sensor in real time. When the clutch slips, the actual transmission ratio of each gear is compared with the theoretical value to accurately locate the fault. Based on the characteristic data, the clutch piston sticking, leakage and other faults are diagnosed, and functions such as self-learning dynamic correction of clutch control parameters are realized, thereby reducing the maintenance and repair costs of transmission shift faults.

[0070] The fault location function of this embodiment is implemented by collecting the speed signal at the turbine and the speed signal at the intermediate gear chain, calculating the actual transmission ratio of the forward / reverse gear, collecting the speed signal at the intermediate gear chain and the output shaft, and calculating the actual transmission ratio of the 1 / 2 / 3 / 4 gear. The possible situations are as follows:

[0071] 1. The actual transmission ratios of forward / reverse gear and 1 / 2 / 3 / 4 gear are the same as the theoretical values, and the clutch works normally at this time;

[0072] 2. The actual transmission ratio of forward / reverse gear is lower than the theoretical value. The actual transmission ratio of 1 / 2 / 3 / 4 gear is the same as the theoretical value. At this time, according to the actual gear situation of the vehicle, the slipping clutch is positioned as the forward gear or the reverse gear;

[0073] 3. The actual transmission ratio of forward / reverse gear is the same as the theoretical value, and the actual transmission ratio of 1 / 2 / 3 / 4 gear is lower than the theoretical value. At this time, according to the actual gear situation of the vehicle, the slipping clutch is positioned in one of the gears 1 / 2 / 3 / 4;

[0074] 4. The actual transmission ratios of forward / reverse gear and 1 / 2 / 3 / 4 gear are all lower than the theoretical values. At this time, the clutches of the vehicle's actual gears are slipping.

[0075] In addition, while monitoring the working status of each clutch, when the clutch has faults such as piston sticking or leakage, the TCU can identify the corresponding fault based on the characteristic data and dynamically correct the control parameters to ensure that the shifting process has a certain fault tolerance.

[0076] Furthermore, the transmission system integrates special software functions for transmission bench calibration, such as solenoid valve vibration and PWM frequency calibration functions. During the development of the automatic transmission, the parameter setting, data improvement and calibration of components such as the clutch, torque converter and solenoid valve can be completed quickly and efficiently; and the transmission has a flexible and scalable software architecture, which can flexibly configure different functional modules, including but not limited to: zero-speed reversing function, fault diagnosis function, offline automatic calibration function, adaptive calibration function, automatic parking on slope function, engine scheduling function, electric motor scheduling function and front drive force management function, etc., which can quickly match application scenarios with different needs.

[0077] The controller involved in the present invention adopts a more flexible software architecture and integrates a special software function for gearbox bench calibration, which can quickly meet different types of gearboxes and different development requirements. It has good flexibility and a high degree of commonality, and is particularly suitable for engineering machinery products to meet the functional diversity requirements of different working conditions.

[0078] In one embodiment, the present invention further provides an automatic transmission shift control device, comprising:

[0079] An acquisition module is used to acquire a speed signal and obtain a shift signal according to the speed signal;

[0080] A judgment module is used to judge whether the shift signal reaches the shift range of the shift curve. If not, the shift mode is not entered, and the corresponding signal is continuously collected until the shift signal reaches the corresponding shift range, and an upshift or downshift command is issued;

[0081] The shift module is used to enter the shift mode. The TCU outputs the driving current of the corresponding gear solenoid valve to control the current gear clutch to disengage and the target gear clutch to engage.

[0082] Specifically, refer to the attached manual Figure 3 The acquisition module includes a speed sensor 3, which includes a first speed sensor 31 and a second speed sensor 32. The first speed sensor 31 is arranged at the torque converter pump wheel, and the second speed sensor 32 is arranged at the turbine. The first speed sensor 31 collects the speed signal of the torque converter pump wheel, and the second speed sensor 32 collects the speed signal of the turbine. The shift signal is obtained according to the speed signal of the torque converter pump wheel and the speed signal of the turbine.

[0083] Furthermore, the main oil pressure signal and temperature signal of the gearbox are collected, and the shift signal is obtained by combining the speed signal of the torque converter pump wheel and the speed signal of the turbine. The vehicle driving condition, the shifting condition and the clutch working state are judged, and the shift signal is obtained. According to the shift curve, it is judged whether the gearbox enters the shift mode. The speed signal of the torque converter pump wheel and the speed signal of the turbine can be used as the basis for TCU dual-parameter shifting. Compared with single-parameter shifting, the shifting process is more timely, accurate, stable and rapid. When the shifting parameters reach the calibrated shifting upshift or downshifting range, the TCU enters the shifting mode, issues a shifting command, controls the solenoid valve to act, the current gear clutch is disengaged, and the target gear clutch is engaged.

[0084] The TCU monitors the front and rear speed signals of each clutch friction plate through the first speed sensor and the second speed sensor. The actual speed signal enters the TCU. The TCU determines the degree of engagement between the target clutch and the current gear clutch during the gear shifting process, calculates the error between the actual and expected clutch oil pressure curves, and adjusts the drive current output to the solenoid valve in the power shift transmission through PI control and nonlinear control, thereby adjusting the oil pressure of each clutch in the power shift transmission to achieve a better gear shift control effect.

[0085] Furthermore, the speed sensor 3 includes a third speed sensor 33 and a fourth speed sensor 34. The third speed sensor 33 is arranged at the intermediate gear chain of the gearbox, and the fourth speed sensor 34 is arranged at the output shaft; the second speed sensor 32 collects the speed signal of the turbine in real time, the third speed sensor 33 collects the speed signal of the intermediate gear chain of the gearbox in real time, and the fourth speed sensor 33 collects the speed signal of the output shaft in real time. When the clutch slips, the clutch fault is diagnosed by comparing the actual transmission ratio of each gear with the theoretical value.

[0086] In one embodiment, the present invention further provides an electronic device, including a processor and a storage medium; the storage medium is used to store instructions; the processor is used to operate according to the instructions to execute the steps of any one of the above methods.

[0087] In one embodiment, the present invention further provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of any of the above methods when executed by a processor.

[0088] In one embodiment, the present invention further provides a vehicle, comprising:

[0089] An on-vehicle electronic device, the on-vehicle electronic device is used to implement any one of the above-mentioned automatic transmission shift control methods;

[0090] A processor, the processor runs a program, and when the program runs, data output from the on-board electronic device executes the steps of any one of the above-mentioned automatic transmission shift control methods;

[0091] The storage medium is used to store a program, and when the program is running, the steps of any one of the above-mentioned automatic transmission shift control methods are executed for data output from the vehicle-mounted electronic device.

[0092] For example, see the attached manual Figure 6, this embodiment provides a vehicle, including a vehicle control system, which includes TCU1, a power shift transmission 2, a speed sensor 3, a VCU4, an MCU5, an accelerator pedal 6 and a shift handle 7. TCU1 is a transmission control unit, VCU4 is a vehicle control unit, and MCU5 is a drive motor control unit. TCU1 is connected to the speed sensor 3 and the power shift transmission 2 through a wiring harness, and the speed sensor 3 transmits multiple speed signals to TCU1, and TCU1 performs AD conversion and processes data internally; at the same time, TCU1 accesses CAN bus communication, obtains the position information of the accelerator pedal 6, the position information of the shift handle 7 and the speed information of the drive motor from VCU4, which is used to judge the gearshift working condition or other functions of the gearbox in the manual shift mode; VCU4 collects the working conditions of the accelerator pedal 6, the shift handle 7 and other electrical modules of the vehicle and controls them, and MCU5 realizes the motor control function, and communicates with the ECU5 of the whole vehicle, transmits signals such as speed and receives speed instructions, etc.

[0093] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0094] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0095] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0096] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0097] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0098] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A method for controlling automatic transmission shifting, characterized in that: Includes steps: Collect speed signals, and obtain shift signals according to the speed signals; Determine whether the shift signal reaches the shift range of the shift curve. If not, do not enter the shift mode and continue to collect corresponding signals until the shift signal reaches the corresponding shift range, and issue an upshift or downshift command. When entering the gear shift mode, the TCU outputs the driving current of the corresponding gear solenoid valve, controls the current gear clutch to disengage, and controls the target gear clutch to engage.

2. The automatic transmission shift control method according to claim 1, characterized in that: The collecting of the speed signal and obtaining the shift signal according to the speed signal specifically comprises the steps of: A first speed sensor is arranged at the torque converter pump wheel, and a second speed sensor is arranged at the turbine. The first speed sensor collects a speed signal of the torque converter pump wheel, and the second speed sensor collects a speed signal of the turbine. A shift signal is obtained according to the speed signal of the torque converter pump wheel and the speed signal of the turbine.

3. The automatic transmission shift control method according to claim 2, characterized in that: Also includes the steps: The main oil pressure signal and temperature signal of the gearbox are collected, and the shift signal is obtained by combining the speed signal of the torque converter pump wheel and the speed signal of the turbine. The vehicle driving condition, shift condition and clutch working state are judged, and the shift signal is obtained. According to the shift curve, it is judged whether the gearbox enters the shift mode.

4. The automatic transmission shift control method according to claim 3, characterized in that: Also includes the steps: The TCU monitors the front and rear speed signals of each clutch friction plate through the first speed sensor and the second speed sensor. The actual speed signal enters the TCU. The TCU determines the degree of engagement between the target clutch and the current gear clutch during the gear shifting process, calculates the error between the actual and expected clutch oil pressure curves, and adjusts the drive current output to the solenoid valve in the power shift transmission through PI control and nonlinear control, thereby adjusting the oil pressure of each clutch in the power shift transmission.

5. The automatic transmission shift control method according to claim 1, characterized in that: The shift mode is entered, and the TCU outputs the driving current of the corresponding gear solenoid valve, controls the current gear clutch to be disengaged, and controls the target gear clutch to be engaged, specifically including the following steps: Solenoid valve pre-start, low-frequency vibration pre-moves the target gear solenoid valve, so that it enters a low-amplitude vibration state from a relatively static state of the valve core, improving the response speed of the subsequent control stage; The target gear clutch is quickly filled with fluid, and the target gear clutch piston is pushed to move toward the friction plate at the fastest speed to eliminate the gap between the piston and the friction plate. The filling time is controlled to reach the preset value, and then the target gear clutch pre-presses the friction plate to eliminate the gap between the friction plates of the target gear clutch, and the oil pressure reaches the preset value; the original gear is released and the pressure is maintained, and the original gear clutch is reduced to an appropriate torque transmission pressure value to reduce power interruption during the gear shifting process; The target gear clutch is torqued and gradually pressed until the actual gear ratio of the transmission reaches the preset value, and the original gear clutch is disengaged and pressure is released; The target gear clutch pressure is locked and pulled up, rising rapidly to the preset value; Complete the corresponding gear shifting operation, exit the gear shifting mode, and the gear shifting is completed.

6. The automatic transmission shift control method according to claim 1, characterized in that: Also includes the steps: A third speed sensor is arranged at the intermediate gear chain of the gearbox, and a fourth speed sensor is arranged at the output shaft. The second speed sensor collects the speed signal of the turbine in real time, the third speed sensor collects the speed signal of the intermediate gear chain of the gearbox in real time, and the fourth speed sensor collects the speed signal of the output shaft in real time. When the clutch slips, the clutch fault is diagnosed by comparing the actual transmission ratios of each gear with the theoretical values.

7. An automatic transmission shift control device, characterized in that: include: An acquisition module is used to acquire a speed signal and obtain a shift signal according to the speed signal; A judgment module is used to judge whether the shift signal reaches the shift range of the shift curve. If not, the shift mode is not entered, and the corresponding signal is continuously collected until the shift signal reaches the corresponding shift range, and an upshift or downshift command is issued; The shift module is used to enter the shift mode. The TCU outputs the driving current of the corresponding gear solenoid valve to control the current gear clutch to disengage and the target gear clutch to engage.

8. An electronic device, characterized in that: including processor and storage medium; The storage medium is used to store instructions; The processor is configured to operate according to the instructions to execute the steps of the method according to any one of claims 1-6.

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

10. A vehicle, characterized in that: include: An on-vehicle electronic device, the on-vehicle electronic device being used to implement the automatic transmission shift control method according to any one of claims 1 to 6; a processor, the processor running a program, and when the program is running, the data output from the on-board electronic device executes the steps of the automatic transmission shift control method according to any one of claims 1 to 6; A storage medium for storing a program, wherein when the program is run, the program executes the steps of the automatic transmission shift control method according to any one of claims 1 to 6 for data output from an on-board electronic device.

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