Automatic transmission control method, device, electronic device and storage medium

Abstract

The present invention provides an automatic transmission control method, device, electronic device and storage medium, which relates to the technical field of automatic transmission adaptive calibration control. By obtaining the oil temperature value, turbine speed value and output shaft speed value of the hydraulic oil circuit during the gear shifting process, the turbine speed value and the output shaft speed value are normalized to obtain a transmission ratio array; according to the transmission ratio array, a calibrated volume ratio current value, a calibrated initial current value and a calibrated gear-off current value are obtained; and the next gear shifting process is controlled according to the calibrated volume ratio current value, the calibrated initial current value and the calibrated gear-off current value. The volume ratio current value, the initial current value and the gear-off current value are calibrated and optimized by using the transmission ratio array as an evaluation standard, simplifying the traditional complex control parameter calibration process into an easily observable and quantifiable transmission ratio evaluation method, and providing an effective basic calibration method for the mass production of automatic transmission control units.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic transmission adaptive calibration control, and in particular to an automatic transmission control method, device, electronic equipment and storage medium. Background Art

[0002] When the automatic transmission is working, the automatic transmission control module (TCM), or automatic transmission control unit (TCU), sends a control signal, which controls the action of the solenoid valve, and then controls the hydraulic oil circuit to drive the piston movement. The piston movement controls the engagement and disengagement of the clutch. The combination of different clutches can enable a specific gear combination to transmit torque (power). Each gear combination has a specific transmission ratio.

[0003] When shifting gears, the TCM controls the current gear clutch to disengage through the solenoid valve, and engages the desired gear clutch at the same time, thereby changing the transmission ratio and completing the shifting process. During the shifting process, the TCM sends a current signal to the desired gear clutch to engage it, and a current signal to the current gear clutch to disengage it. The magnitude and timing of the two currents are the key to a fast and smooth shifting process. The existing automatic transmission relies on human experience to adjust the parameters of the above currents, which is too inefficient to be achieved in mass-produced transmissions. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a new control method for adaptive calibration of a transmission to achieve automatic parameter adjustment of an automatic transmission.

[0005] In a first aspect, an embodiment of the present invention provides an automatic transmission control method, comprising the following steps:

[0006] The oil temperature value of the hydraulic oil circuit, the turbine speed value and the output shaft speed value during the gear shifting process are obtained, and the turbine speed value and the output shaft speed value are normalized to obtain a transmission ratio array;

[0007] Obtaining a calibrated volumetric current value, a calibrated initial current value and a calibrated gear-off current value according to the transmission ratio array;

[0008] The next gear shifting process is controlled according to the calibrated volumetric current value, the calibrated initial current value and the calibrated gear-shifting current value.

[0009] Furthermore, the step of normalizing the turbine speed value and the output shaft speed value to obtain a transmission ratio array includes:

[0010] The transmission ratio array TOR[i] is the ratio of the turbine speed value NT[i] to the output shaft speed value NO[i] at the same time.

[0011] Furthermore, the step of obtaining the calibrated volume ratio current value according to the transmission ratio array includes:

[0012] Obtain the calibrated transmission ratio curve before the initial current takes effect;

[0013] The transmission ratio curve to be calibrated is obtained according to the oil temperature value of the hydraulic oil circuit, the turbine speed value and the output shaft speed value obtained during the gear shifting process;

[0014] The transmission ratio array is calculated by the sorting method. When the transmission ratio curve to be calibrated is protruding, the volumetric current value is increased, and when the transmission ratio curve is concave, the volumetric current value is reduced to obtain the calibrated transmission ratio curve and the calibrated volumetric current value.

[0015] Furthermore, the step of obtaining the calibration initial current value according to the transmission ratio array includes:

[0016] Calculate the difference between the maximum and minimum values ​​of the transmission ratio group and divide it into 30 equal parts TOR Step. Intersect the 30 TOR Steps with the curve of the transmission ratio array TOR[i] to obtain the intersection number array TOR Step[i]. According to the theoretical transmission ratio before and after the gear shift, the intersection number array is divided into the upper, middle and lower parts. If the number of intersections of TOR Step[i] in the upper part is greater than 2, increase the initial current. If TOR Step[i] has a value in the lower part, reduce the initial current until the transmission ratio curve produces a relatively regular Z-shaped turning point and obtains the calibrated initial current value.

[0017] Furthermore, the step of obtaining the calibrated gear-shifting current value according to the transmission ratio array includes:

[0018] Determine whether there are twists and turns in the middle section of the transmission ratio curve under the calibrated volume ratio current value and the calibrated initial current value. If there are twists and turns, reduce the gear-off current and obtain the calibrated gear-off current value.

[0019] Furthermore, the step of controlling the next gear shifting process according to the calibrated volume ratio current value, the calibrated initial current value and the calibrated gear-off current value includes:

[0020] Control the target gear clutch pre-fill oil according to the calibrated volume ratio current value;

[0021] When the target gear clutch reaches the set threshold, the target clutch is controlled to engage according to the calibrated initial current value, and the current gear clutch is controlled to disengage according to the calibrated gear-shifting current value.

[0022] Furthermore, the step of controlling the next gear shifting process according to the calibrated volume ratio current value, the calibrated initial current value and the calibrated gear-off current value also includes:

[0023] According to the vehicle impact degree and the output shaft speed deviation results, it is determined whether to repeatedly obtain the calibrated volume ratio current value, the calibrated initial current value and the calibrated gear-shifting current value and control the next gear shifting process.

[0024] In a second aspect, an embodiment of the present invention further provides an automatic transmission control device, comprising:

[0025] A detection module is used to obtain the oil temperature value of the hydraulic oil circuit, the turbine speed value and the output shaft speed value during the gear shifting process, and normalize the turbine speed value and the output shaft speed value to obtain a transmission ratio array;

[0026] A calibration module, used for obtaining a calibration volume ratio current value, a calibration initial current value and a calibration shift current value according to a transmission ratio array;

[0027] The optimization module is used to control the next gear shifting process according to the calibrated volume ratio current value, the calibrated initial current value and the calibrated gear-off current value.

[0028] In a third aspect, an embodiment of the present invention further provides an electronic device, comprising: a processor, a storage medium and a bus, wherein the storage medium stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor communicates with the storage medium via the bus, and the processor executes the machine-readable instructions to perform the steps of any of the automatic transmission control methods described above.

[0029] In a fourth aspect, an embodiment of the present invention further provides a storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of any of the above-mentioned automatic transmission control methods are executed.

[0030] The embodiments of the present invention bring the following beneficial effects: the method uses the transmission ratio array as an evaluation standard to calibrate and optimize the volume ratio current value, the initial current value and the gear-shifting current value, simplifies the traditional complex control parameter calibration process into an easily observable and quantifiable transmission ratio evaluation method, and provides an effective basic calibration method for the mass production of automatic transmission control units.

[0031] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A schematic flow chart of an automatic transmission control method provided by an embodiment of the present invention;

[0035] Figure 2 A schematic diagram of the structure of an automatic transmission control device provided by an embodiment of the present invention;

[0036] Figure 3 A schematic diagram of an electronic device provided by an embodiment of the present invention.

[0037] icon:

[0038] 100 - detection module; 200 - calibration module; 300 - optimization module; 501 - memory; 502 - processor; 503 - bus. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] At present, in the automatic transmission gear control, the gear shifting process is realized based on the current signal sent by the TCM to the desired gear clutch to make it engage, and the current signal sent to the current gear clutch to make it disengage. In the prior art, the parameter adjustment of the two current signals depends on the experience of the operator, which has great limitations on mass-produced gearboxes. The automatic transmission control method provided in the embodiment of the present invention can realize automatic parameter adjustment of the automatic transmission.

[0041] To facilitate understanding of this embodiment, an automatic transmission control method disclosed in an embodiment of the present invention is first introduced in detail.

[0042] Embodiment 1:

[0043] This embodiment provides an automatic transmission control method, comprising the following steps:

[0044] S110: Acquire the oil temperature value of the hydraulic oil circuit, the turbine speed value, and the output shaft speed value during the gear shifting process, and normalize the turbine speed value and the output shaft speed value to obtain a transmission ratio array;

[0045] S120: obtaining a calibrated volume ratio current value, a calibrated initial current value, and a calibrated gear-off current value according to the transmission ratio array;

[0046] S130: Control the next gear shifting process according to the calibrated volume ratio current value, the calibrated initial current value and the calibrated gear-off current value.

[0047] The step of normalizing the turbine speed value and the output shaft speed value to obtain a transmission ratio array includes:

[0048] The transmission ratio array TOR[i] is the ratio of the turbine speed value NT[i] to the output shaft speed value NO[i] at the same time.

[0049] The steps of obtaining the calibrated volume ratio current value according to the transmission ratio array include:

[0050] Obtain the calibrated transmission ratio curve before the initial current takes effect;

[0051] The transmission ratio curve to be calibrated is obtained according to the oil temperature value of the hydraulic oil circuit, the turbine speed value and the output shaft speed value obtained during the gear shifting process;

[0052] The transmission ratio array is calculated by the sorting method. When the transmission ratio curve to be calibrated is protruding, the volumetric current value is increased, and when the transmission ratio curve is concave, the volumetric current value is reduced to obtain the calibrated transmission ratio curve and the calibrated volumetric current value.

[0053] The steps of obtaining the calibration initial current value according to the transmission ratio array include:

[0054] Calculate the difference between the maximum and minimum values ​​of the transmission ratio group and divide it into 30 equal parts TOR Step. Intersect the 30 TOR Steps with the curve of the transmission ratio array TOR[i] to obtain the intersection number array TOR Step[i]. According to the theoretical transmission ratio before and after the gear shift, the intersection number array is divided into the upper, middle and lower parts. If the number of intersections of TOR Step[i] in the upper part is greater than 2, increase the initial current. If TOR Step[i] has a value in the lower part, reduce the initial current until the transmission ratio curve produces a relatively regular Z-shaped turning point and obtains the calibrated initial current value.

[0055] The steps of obtaining the calibrated gear-shifting current value according to the transmission ratio array include:

[0056] Determine whether there are twists and turns in the middle section of the transmission ratio curve under the calibrated volume ratio current value and the calibrated initial current value. If there are twists and turns, reduce the gear-off current and obtain the calibrated gear-off current value.

[0057] The steps of controlling the next gear shifting process according to the calibrated volume ratio current value, the calibrated initial current value and the calibrated gear-off current value include:

[0058] Control the target gear clutch pre-fill oil according to the calibrated volume ratio current value;

[0059] When the target gear clutch reaches the set threshold, the target clutch is controlled to engage according to the calibrated initial current value, and the current gear clutch is controlled to disengage according to the calibrated gear-shifting current value.

[0060] The step of controlling the next gear shifting process according to the calibrated volume ratio current value, the calibrated initial current value and the calibrated gear-off current value also includes:

[0061] The deviation value is obtained based on the output shaft fitting straight line. If the deviation value is greater than the set threshold, the calibrated volume ratio current value, the calibrated initial current value and the calibrated gear-off current value are repeatedly obtained to control the next gear shift process.

[0062] The steps of obtaining the deviation value based on the output shaft fitting straight line include:

[0063] The output shaft speed data is fitted into a straight line equation by cyclically calling the generalized least squares method and the Levenberg-Marquardt method:

[0064] f = ax + b;

[0065] Where x is the input sequence X, a is the slope, and b is the intercept;

[0066] The linear curve obtained by the linear fitting algorithm is described by the following formula:

[0067] y[i]=ax[i]+b;

[0068] The slope and intercept of the linear model were obtained by the least absolute residual method according to the minimum residual of the following equation:

[0069]

[0070] The step of controlling the next gear shifting process according to the calibrated volume ratio current value, the calibrated initial current value and the calibrated gear-off current value also includes:

[0071] According to the vehicle impact degree and the output shaft speed deviation results, it is determined whether to repeatedly obtain the calibrated volume ratio current value, the calibrated initial current value and the calibrated gear-shifting current value and control the next gear shifting process.

[0072] Through the above method, the transmission ratio array is used as the evaluation standard to calibrate and optimize the volumetric current value, initial current value and gear-shifting current value, and the traditional complex control parameter calibration process is simplified into an easily observable and quantifiable transmission ratio evaluation method, providing an effective basic calibration method for the mass production of automatic transmission control units.

[0073] Embodiment 2:

[0074] The embodiment of the present invention further provides an automatic transmission control device, comprising:

[0075] The detection module 100 is used to obtain the oil temperature value of the hydraulic oil circuit, the turbine speed value and the output shaft speed value during the gear shifting process, and normalize the turbine speed value and the output shaft speed value to obtain a transmission ratio array;

[0076] The calibration module 200 is used to obtain a calibration volume ratio current value, a calibration initial current value and a calibration shift-off current value according to the transmission ratio array;

[0077] The optimization module 300 is used to control the next gear shifting process according to the calibrated volume ratio current value, the calibrated initial current value and the calibrated gear-off current value.

[0078] Embodiment three:

[0079] An embodiment of the present invention also provides an electronic device, comprising: a processor 502, a memory 501 and a bus 503, wherein the memory 501 stores machine-readable instructions executable by the processor 502, and when the electronic device is running, the processor 502 communicates with the memory 501 via the bus 503, and the processor 502 executes the machine-readable instructions to perform the steps of any of the automatic transmission control methods described above.

[0080] Embodiment 4:

[0081] The embodiment of the present invention also provides a storage medium, on which a computer program is stored. When the computer program is executed by the processor 502, the steps of any of the above-mentioned automatic transmission control methods are executed.

[0082] The flow charts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the system, method and computer program product according to multiple embodiments of the present invention. In this regard, each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0083] The above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, it should be understood by those skilled in the art that any person familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or perform equivalent replacements on some of the technical features thereof; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. Automatic transmission control method, It is characterized in that The steps include: The oil temperature value of the hydraulic oil circuit, the turbine speed value and the output shaft speed value during the gear shifting process are obtained, and the turbine speed value and the output shaft speed value are normalized to obtain a transmission ratio array; Obtaining a calibrated volumetric current value, a calibrated initial current value and a calibrated gear-off current value according to the transmission ratio array; The next gear shifting process is controlled according to the calibrated volume ratio current value, the calibrated initial current value and the calibrated gear-off current value; The step of normalizing the turbine speed value and the output shaft speed value to obtain a transmission ratio array comprises: The transmission ratio array TOR[i] is the ratio of the turbine speed value NT[i] to the output shaft speed value NO[i] at the same time; The step of obtaining the calibrated volume ratio current value according to the transmission ratio array comprises: Obtain the calibrated transmission ratio curve before the initial current takes effect; The transmission ratio curve to be calibrated is obtained according to the oil temperature value of the hydraulic oil circuit, the turbine speed value and the output shaft speed value obtained during the gear shifting process; The transmission ratio array is calculated by a sorting method, the volumetric current value is increased when the transmission ratio curve to be calibrated is protruding, and the volumetric current value is reduced when the transmission ratio curve is concave, so as to obtain a calibrated transmission ratio curve and a calibrated volumetric current value; The steps of obtaining the calibration initial current value according to the transmission ratio array include: Calculate the difference between the maximum and minimum values ​​of the transmission ratio array and divide it into 30 equal parts TOR Step. Intersect the 30 TOR Steps with the curve of the transmission ratio array TOR[i] to obtain the intersection number array TOR Step[i]. According to the theoretical transmission ratio before and after the gear shift, the intersection number array is divided into upper, middle and lower parts. If the number of intersections of TOR Step[i] in the upper part is greater than 2, increase the initial current. If TOR Step[i] has a value in the lower part, reduce the initial current until the transmission ratio curve produces a relatively regular Z-shaped turning point and obtains the calibrated initial current value.

2. The automatic transmission control method according to claim 1, It is characterized in that The steps of obtaining the calibrated gear-shifting current value according to the transmission ratio array include: Determine whether there are twists and turns in the middle section of the transmission ratio curve under the calibrated volume ratio current value and the calibrated initial current value. If there are twists and turns, reduce the gear-off current and obtain the calibrated gear-off current value.

3. The automatic transmission control method according to claim 1, It is characterized in that The step of controlling the next gear shifting process according to the calibrated volume ratio current value, the calibrated initial current value and the calibrated gear-off current value comprises: Control the target gear clutch pre-fill oil according to the calibrated volume ratio current value; When the target gear clutch reaches the set threshold, the target clutch is controlled to engage according to the calibrated initial current value, and the current gear clutch is controlled to disengage according to the calibrated gear-shifting current value.

4. The automatic transmission control method according to claim 1, It is characterized in that The step of controlling the next gear shifting process according to the calibrated volume ratio current value, the calibrated initial current value and the calibrated gear-off current value also includes: The deviation value is obtained based on the output shaft fitting straight line. If the deviation value is greater than the set threshold, the calibrated volume ratio current value, the calibrated initial current value and the calibrated gear-off current value are repeatedly obtained to control the next gear shift process.

5. Automatic transmission control device, It is characterized in that include: A detection module is used to obtain the oil temperature value of the hydraulic oil circuit, the turbine speed value and the output shaft speed value during the gear shifting process, and normalize the turbine speed value and the output shaft speed value to obtain a transmission ratio array; A calibration module, used for obtaining a calibration volume ratio current value, a calibration initial current value and a calibration shift current value according to a transmission ratio array; An optimization module is used to control the next gear shift process according to the calibrated volume ratio current value, the calibrated initial current value and the calibrated gear-off current value; The step of the detection module normalizing the turbine speed value and the output shaft speed value to obtain a transmission ratio array includes: The transmission ratio array TOR[i] is the ratio of the turbine speed value NT[i] to the output shaft speed value NO[i] at the same time; The step of obtaining the calibration volume ratio current value according to the transmission ratio array by the calibration module includes: Obtain the calibrated transmission ratio curve before the initial current takes effect; The transmission ratio curve to be calibrated is obtained according to the oil temperature value of the hydraulic oil circuit, the turbine speed value and the output shaft speed value obtained during the gear shifting process; The transmission ratio array is calculated by a sorting method, the volumetric current value is increased when the transmission ratio curve to be calibrated is protruding, and the volumetric current value is reduced when the transmission ratio curve is concave, so as to obtain a calibrated transmission ratio curve and a calibrated volumetric current value; The step of obtaining the calibration initial current value according to the transmission ratio array by the calibration module includes: Calculate the difference between the maximum and minimum values ​​of the transmission ratio array and divide it into 30 equal parts TOR Step. Intersect the 30 TOR Steps with the curve of the transmission ratio array TOR[i] to obtain the intersection number array TOR Step[i]. According to the theoretical transmission ratio before and after the gear shift, the intersection number array is divided into upper, middle and lower parts. If the number of intersections of TOR Step[i] in the upper part is greater than 2, increase the initial current. If TOR Step[i] has a value in the lower part, reduce the initial current until the transmission ratio curve produces a relatively regular Z-shaped turning point and obtains the calibrated initial current value.

6. An electronic device, It is characterized in that include: A processor, a storage medium and a bus, wherein the storage medium stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the storage medium communicate via the bus, and the processor executes the machine-readable instructions to perform the steps of the automatic transmission control method as described in any one of claims 1 to 4.

7. A storage medium, It is characterized in that The storage medium stores a computer program, and when the computer program is executed by the processor, the steps of the automatic transmission control method according to any one of claims 1 to 4 are executed.

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