Intermediate shaft brake self-learning method, device, equipment, medium and product

Abstract

The invention discloses an intermediate shaft brake self-learning method, device and equipment, a medium and a product. The intermediate shaft brake self-learning method comprises the steps that the initial rotating speed, the gearbox oil temperature and the front auxiliary box gear of an intermediate shaft before braking and the braking rotating speed of the intermediate shaft after braking based on preset braking parameters are obtained; according to the initial rotating speed, the braking rotating speed and preset braking parameters, the actual deceleration rate is determined; according to the friction coefficient of the intermediate shaft brake, a preset braking parameter and an oil temperature compensation coefficient corresponding to the oil temperature of the gearbox, the current braking torque is determined; and the expected deceleration rate is determined according to the front auxiliary box gear and the current braking torque, and the preset braking parameters are adjusted according to the actual deceleration rate and the expected deceleration rate. According to the technical scheme, efficiency detection and compensation adjustment can be carried out on the intermediate shaft brake in real time.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission detection, and particularly to a self-learning method, device, equipment, medium and product for an intermediate shaft brake. Background Art

[0002] Automated Mechanical Transmission (AMT) is widely used in commercial vehicles to improve shifting accuracy and driving comfort. In the ATM system, the intermediate shaft brake, as one of the key components, is responsible for applying braking force to the intermediate shaft during the shifting process to ensure smooth shifting.

[0003] However, as the vehicle usage time increases, the intermediate shaft brake may experience a decline in braking performance due to wear, aging or other factors, affecting the shifting smoothness and safety of the vehicle. Therefore, it is very important to detect and compensate the braking efficiency of the intermediate shaft brake for smooth shifting of the vehicle. Summary of the Invention

[0004] The present invention provides a self-learning method, device, equipment, medium and product for an intermediate shaft brake to detect and compensate the efficiency of the intermediate shaft brake.

[0005] According to one aspect of the present invention, there is provided a self-learning method for an intermediate shaft brake, including:

[0006] Obtaining the initial speed of the intermediate shaft before braking, the transmission oil temperature, the front auxiliary box gear position, and the braking speed of the intermediate shaft after braking based on preset braking parameters;

[0007] Determining the actual deceleration rate according to the initial speed, the braking speed and the preset braking parameters;

[0008] Determining the current braking torque according to the friction coefficient of the intermediate shaft brake, the preset braking parameters and the oil temperature compensation coefficient corresponding to the transmission oil temperature;

[0009] Determining the expected deceleration rate according to the front auxiliary box gear position and the current braking torque, and adjusting the preset braking parameters according to the actual deceleration rate and the expected deceleration rate.

[0010] According to another aspect of the present invention, there is provided a self-learning device for an intermediate shaft brake, including:

[0011] An intermediate shaft parameter acquisition module for obtaining the initial speed of the intermediate shaft before braking, the transmission oil temperature, the front auxiliary box gear position, and the braking speed of the intermediate shaft after braking based on preset braking parameters;

[0012] An actual speed determination module, configured to determine an actual deceleration rate according to the initial speed, the braking speed, and a preset braking parameter;

[0013] A braking torque determination module, configured to determine a current braking torque according to the friction coefficient of the intermediate shaft brake, a preset braking parameter, and an oil temperature compensation coefficient corresponding to the gearbox oil temperature;

[0014] A braking parameter adjustment module, configured to determine an expected deceleration rate according to the front auxiliary box gear position and the current braking torque, and adjust the preset braking parameter according to the actual deceleration rate and the expected deceleration rate.

[0015] According to another aspect of the present invention, there is provided an electronic device, including:

[0016] At least one processor; and

[0017] A memory communicatively connected to the at least one processor; wherein,

[0018] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the intermediate shaft brake self-learning method according to any embodiment of the present invention.

[0019] According to another aspect of the present invention, there is provided a computer-readable storage medium storing computer instructions for causing a processor to implement the intermediate shaft brake self-learning method according to any embodiment of the present invention when executed.

[0020] According to another aspect of the present invention, there is provided a computer program product including a computer program, and the computer program implements the intermediate shaft brake self-learning method according to any embodiment of the present disclosure when executed by a processor.

[0021] The technical solution of the embodiment of the present invention obtains the initial speed of the intermediate shaft before braking, the gearbox oil temperature, the front auxiliary box gear position, and the braking speed of the intermediate shaft after braking based on a preset braking parameter, and then determines the actual deceleration rate according to the initial speed, the braking speed, and the preset braking parameter, and determines the current braking torque according to the friction coefficient of the intermediate shaft brake, the preset braking parameter, and the oil temperature compensation coefficient corresponding to the gearbox oil temperature. Finally, the expected deceleration rate is determined according to the front auxiliary box gear position and the current braking torque, and the preset braking parameter is adjusted according to the actual deceleration rate and the expected deceleration rate. By monitoring and compensating and adjusting the working state of the intermediate shaft brake, the smoothness of the shifting process and the braking efficiency can be ensured.

[0022] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understandable through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 is a flowchart of a self - learning method for an intermediate shaft brake according to Embodiment 1 of the present invention;

[0025] Figure 2 is a flowchart of a self - learning method for an intermediate shaft brake according to Embodiment 2 of the present invention;

[0026] Figure 3 is a schematic structural diagram of a self - learning device for an intermediate shaft brake according to Embodiment 3 of the present invention;

[0027] Figure 4 is a schematic structural diagram of an electronic device for implementing the self - learning method of the intermediate shaft brake in the embodiments of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, rather than all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above - mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order different from those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non - exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these process, method, product or device.

[0030] Embodiment 1

[0031] Figure 1 FIG. 6 is a flowchart of a self - learning method for an intermediate shaft brake provided in Embodiment 1 of the present invention. This embodiment is applicable to the situation of detecting the braking efficiency and compensating and adjusting the intermediate shaft brake. This method can be executed by an intermediate shaft brake self - learning device, which can be implemented in the form of hardware and / or software. The intermediate shaft brake self - learning device can be configured in various general - purpose computing devices, such as a vehicle automatic transmission control unit (Transmission Control Unit, abbreviated as TCU). As Figure 1 shown, the method includes:

[0032] S110. Obtain the initial speed of the intermediate shaft, the transmission oil temperature, the front auxiliary box gear position before braking, and the braking speed of the intermediate shaft after braking based on preset braking parameters.

[0033] The preset braking parameters are the parameters used by the intermediate shaft brake during braking. Exemplarily, the preset braking parameters are the intake air pressure and the valve - opening duration of the intake valve of the intermediate shaft brake.

[0034] In the embodiment of the present invention, in order to determine the actual deceleration rate, when starting to detect the braking efficiency of the intermediate shaft, first obtain the initial speed of the intermediate shaft, the transmission oil temperature, and the front auxiliary box gear position. Further, control the disengaged clutch to disconnect the power transmission between the engine and the intermediate shaft, and use the intermediate shaft brake to brake based on the preset braking parameters.

[0035] Exemplarily, the preset braking parameters are the intake air pressure and the valve - opening duration of the intake valve of the intermediate shaft brake. That is, after disengaging the clutch, based on the intake air pressure and the valve - opening duration in the preset braking parameters, open the intake valve of the intermediate shaft brake and maintain the pressure of the intermediate shaft brake for the valve - opening duration. After completing the braking of the intermediate shaft based on the preset braking parameters, further obtain the braking speed of the intermediate shaft.

[0036] S120. Determine the actual deceleration rate according to the initial speed, the braking speed, and the preset braking parameters.

[0037] In the embodiment of the present invention, after collecting the initial speed and the braking speed of the intermediate shaft, determine the actual deceleration rate according to the initial speed, the braking speed, and the preset braking parameters. Among them, the valve - opening duration t included in the preset braking parameters is the braking duration. That is to say, according to the initial speed, the braking speed, and the valve - opening duration of the intermediate shaft, the actual deceleration rate can be calculated. The specific calculation formula is as follows:

[0038]

[0039] where ΔT is the actual deceleration rate, N start is the initial rotational speed of the intermediate shaft before braking, N end is the braking rotational speed of the intermediate shaft after braking, and t is the time taken for the braking process, i.e., the valve opening duration.

[0040] S130. Determine the current braking torque according to the friction coefficient of the intermediate shaft brake, the preset braking parameters, and the oil temperature compensation coefficient corresponding to the gearbox oil temperature.

[0041] In the embodiments of the present invention, the current braking torque is further determined according to the friction coefficient of the intermediate shaft brake, the preset braking parameters, and the oil temperature compensation coefficient corresponding to the gearbox oil temperature. Specifically, the preset braking parameters include the intake air pressure of the intake valve of the intermediate shaft brake, and the pressure coefficient corresponding to the intake air pressure can be determined according to the intake air pressure. Finally, the current braking torque is determined according to the friction coefficient of the intermediate shaft brake, the intake air pressure of the intake valve of the intermediate shaft brake, the pressure coefficient corresponding to the intake air pressure, and the oil temperature compensation coefficient corresponding to the gearbox oil temperature.

[0042] S140. Determine the desired deceleration rate according to the front auxiliary box gear position and the current braking torque, and adjust the preset braking parameters according to the actual deceleration rate and the desired deceleration rate.

[0043] In the embodiments of the present invention, in order to determine whether the actual deceleration rate meets the braking requirements, the desired deceleration rate is determined according to the front auxiliary box gear position and the current braking torque. Specifically, the corresponding relationship between the braking torque and the desired deceleration rate is first determined according to the front auxiliary box gear position. Furthermore, according to the corresponding relationship between the braking torque and the desired deceleration rate, the desired deceleration rate corresponding to the current braking torque is determined. Among them, the corresponding relationship between the braking torque and the desired deceleration rate can be in the form of a table or a function.

[0044] Furthermore, the preset braking parameters are adjusted according to the actual deceleration rate and the desired deceleration rate. Specifically, the deviation value between the actual deceleration rate and the desired deceleration rate is first calculated. When the deviation value is less than the first threshold N1, no adjustment is required; when the deviation value is greater than the second threshold N2, it indicates that there may be a problem with the brake, and a fault diagnosis prompt can be directly initiated; when the deviation value is between N1 and N2, the preset braking parameters are adjusted, specifically, the intake air pressure and the valve opening duration of the intake valve of the intermediate shaft brake are adjusted. The adjustment process can be: according to the interval where the deviation value is located, the adjustment amplitude of the intake air pressure or the valve opening duration is determined, where the greater the deviation value, the greater the adjustment amplitude of the intake air pressure or the valve opening duration.

[0045] In a specific example, according to the deviation value, the adjustment range of the intake air pressure is determined. After adjustment according to the adjustment range, if the new intake air pressure does not exceed the air pressure threshold, the new intake air pressure is used to replace the current intake air pressure. If the new intake air pressure exceeds the air pressure threshold, the intake air pressure remains unchanged. According to the deviation value, the adjustment range of the valve opening duration is determined. After adjustment according to the adjustment range, if the new valve opening duration does not exceed the duration threshold, the new valve opening duration is used to replace the current valve opening duration.

[0046] In another specific example, when the deviation value is between N1 and N2, the intake air pressure is adjusted according to a preset air pressure adjustment range, and it is determined whether the braking requirement is met during the next round of braking efficiency measurement. If not, the intake air pressure is continuously adjusted according to the air pressure adjustment range until it is determined that the braking requirement is met during the next round of braking efficiency measurement or the intake air pressure reaches the air pressure threshold. When the intake air pressure is adjusted to the air pressure threshold and the braking requirement still cannot be met, the valve opening duration is continuously adjusted according to the duration adjustment range, and it is determined whether the braking requirement is met during the next round of braking efficiency measurement. If not, the valve opening duration is continuously adjusted according to the duration adjustment range until it is determined that the braking requirement is met during the next round of braking efficiency measurement or the valve opening duration reaches the duration threshold. When both the intake air pressure and the valve opening duration reach their respective thresholds but the braking requirement is still not met, a fault diagnosis prompt can be initiated.

[0047] The technical solution of the embodiment of the present invention obtains the initial speed of the intermediate shaft before braking, the transmission oil temperature, the front auxiliary box gear, and the braking speed of the intermediate shaft after braking based on preset braking parameters. Then, according to the initial speed, the braking speed, and the preset braking parameters, the actual deceleration rate is determined. According to the friction coefficient of the intermediate shaft brake, the preset braking parameters, and the oil temperature compensation coefficient corresponding to the transmission oil temperature, the current braking torque is determined. Finally, according to the front auxiliary box gear and the current braking torque, the expected deceleration rate is determined. According to the actual deceleration rate and the expected deceleration rate, the preset braking parameters are adjusted. By monitoring and compensating the working state of the intermediate shaft brake, the smoothness of the shifting process and the braking efficiency can be ensured.

[0048] Embodiment 2

[0049] Figure 2The flowchart of a self - learning method for the intermediate shaft brake provided in the second embodiment of the present invention. This embodiment is further refined on the basis of the above - mentioned embodiment, providing specific steps for determining the actual deceleration rate according to the initial speed, braking speed, and preset braking parameters, specific steps for determining the current braking torque according to the friction coefficient of the intermediate shaft brake, preset braking parameters, and the oil - temperature compensation coefficient corresponding to the gearbox oil temperature, and specific steps for determining the expected deceleration rate according to the front auxiliary box gear position and the current braking torque, and adjusting the preset braking parameters according to the actual deceleration rate and the expected deceleration rate. As Figure 2 shown, the method includes:

[0050] S210. Obtain the initial speed of the intermediate shaft before braking, the gearbox oil temperature, the front auxiliary box gear position, and the braking speed of the intermediate shaft after braking based on the preset braking parameters.

[0051] Among them, the preset braking parameters include the intake air pressure and the valve - opening duration of the intake valve of the intermediate shaft brake

[0052] Optionally, before obtaining the initial speed of the intermediate shaft before braking, it further includes:

[0053] Obtain the current gear state of the vehicle, the handle position, the output shaft speed of the vehicle, and the engine speed;

[0054] When the current gear state and the handle position of the vehicle are both in neutral, and the output shaft speed of the vehicle and the engine speed are both 0, it is determined that the self - learning condition of the intermediate shaft brake is met.

[0055] In this optional embodiment, a self - learning condition judgment operation for the intermediate shaft brake executed before obtaining the initial speed of the intermediate shaft before braking is provided: First, obtain the current gear state of the vehicle, the handle position, the output shaft speed of the vehicle, and the engine speed. When the current gear state and the handle position of the vehicle are both in neutral, and the output shaft speed of the vehicle and the engine speed are both 0, it is determined that the self - learning condition of the intermediate shaft brake is met. When the self - learning condition of the intermediate shaft brake is met, then continue to execute the subsequent operations of obtaining the initial speed of the intermediate shaft before braking, the gearbox oil temperature, the front auxiliary box gear position, and the braking speed of the intermediate shaft after braking based on the preset braking parameters, which can ensure the calculation accuracy of the current actual deceleration rate, and further improve the self - learning effect of the intermediate shaft brake.

[0056] S220. Determine the actual deceleration rate according to the initial speed, the braking speed, and the valve - opening duration of the intake valve of the intermediate shaft brake.

[0057] In the embodiment of the present invention, after collecting the initial speed and the braking speed of the intermediate shaft, the actual deceleration rate is determined according to the initial speed, the braking speed, and the valve - opening duration. The specific calculation formula is as follows:

[0058]

[0059] where, ΔT is the actual deceleration rate, N start is the initial rotational speed of the intermediate shaft before braking, N end is the braking rotational speed of the intermediate shaft after braking, and t is the time taken for the braking process, i.e., the valve opening duration.

[0060] S230. Determine the current braking torque according to the friction coefficient of the intermediate shaft brake, the intake air pressure of the intake valve of the intermediate shaft brake, the pressure coefficient under the intake air pressure, and the oil temperature compensation coefficient corresponding to the transmission oil temperature.

[0061] Optionally, the calculation formula of the braking torque is as follows:

[0062] M = μ(k × P) - i

[0063] where, M is the current braking torque, P is the intake air pressure of the intake valve of the intermediate shaft brake, μ is the pressure coefficient under the intake air pressure, and i is the oil temperature compensation coefficient corresponding to the transmission oil temperature.

[0064] S240. Determine the correlation between the braking torque and the desired deceleration rate according to the front auxiliary box gear position.

[0065] In the embodiments of the present invention, the correlation between the braking torque and the desired deceleration rate is determined according to the front auxiliary box gear position. Specifically, under different front auxiliary box gear positions, the correlation between the braking torque and the desired deceleration rate is different. Exemplarily, the front auxiliary box gear position may include two gears: high and low. The correlation between the braking torque and the desired deceleration rate may be a corresponding relationship in tabular form or a functional relationship.

[0066] S250. Determine the desired deceleration rate corresponding to the current braking torque according to the correlation between the braking torque and the desired deceleration rate.

[0067] In the embodiments of the present invention, the desired deceleration rate corresponding to the current braking torque is determined according to the correlation between the braking torque and the desired deceleration rate. Exemplarily, the desired deceleration rate corresponding to the current braking torque may be found in the correlation table of the braking torque and the desired deceleration rate. Another example is that the current braking torque may be substituted into the correlation function of the braking torque and the desired deceleration rate to determine the desired deceleration rate corresponding to the current braking torque. By jointly determining the desired deceleration rate according to the front auxiliary box gear position and the current braking torque, a more accurate desired deceleration rate can be obtained, which is more accurate for the subsequent evaluation of the actually detected deceleration rate.

[0068] Optionally, after determining the desired deceleration rate according to the front auxiliary box gear position and the current braking torque in the embodiments of the present invention, it further includes:

[0069] Calculate the rate deviation value between the actual deceleration rate and the desired deceleration rate;

[0070] In the case where the rate deviation value is greater than the deviation threshold, perform a fault diagnosis prompt.

[0071] In this optional embodiment, after determining the desired deceleration rate according to the front auxiliary box gear and the current braking torque, calculate the rate deviation value between the actual deceleration rate and the desired deceleration rate. If the rate deviation value is greater than the deviation threshold, perform a fault diagnosis prompt, which can timely remind the personnel to perform fault diagnosis and maintenance in the case of friction material wear, insufficient hydraulic pressure or too high temperature.

[0072] S260. Calculate the rate deviation value between the actual deceleration rate and the desired deceleration rate.

[0073] S270. Determine the intake air pressure compensation value according to the rate deviation value; the greater the rate deviation value, the greater the intake air pressure compensation value.

[0074] In the embodiment of the present invention, determine the intake air pressure compensation value according to the rate deviation value. Among them, the greater the rate deviation value, the greater the intake air pressure compensation value. Exemplarily, a linear positive correlation function relationship between the rate deviation value and the intake air pressure compensation value can be established in advance. Calculate the intake air pressure compensation value according to the rate deviation value and the function relationship.

[0075] S280. Determine the compensated air pressure value according to the intake air pressure compensation value and the intake air pressure of the intermediate shaft brake intake valve.

[0076] In the embodiment of the present invention, after calculating the intake air pressure compensation value, first determine the compensated air pressure value according to the intake air pressure compensation value and the intake air pressure of the intermediate shaft brake intake valve. Specifically, add the intake air pressure compensation value to the current intake air pressure of the intermediate shaft brake intake valve to obtain the compensated air pressure value.

[0077] S290. In the case where the compensated air pressure value is less than or equal to the air pressure threshold, update the intake air pressure of the intermediate shaft brake intake valve to the compensated air pressure value.

[0078] In the embodiment of the present invention, in order to ensure braking safety, the intake air pressure cannot exceed the air pressure threshold. After calculating the compensated air pressure value, it is necessary to compare the compensated air pressure value with the air pressure threshold. In the case where the compensated air pressure value is less than or equal to the air pressure threshold, update the intake air pressure of the intermediate shaft brake intake valve to the compensated air pressure value. By comparing with the air pressure threshold and then determining whether to update the air pressure value, the compensation adjustment safety can be improved and damage to vehicle components can be avoided.

[0079] Optionally, the embodiment of the present invention further includes:

[0080] When the compensated air pressure value is greater than the air pressure threshold, determine the intake time compensation value according to the rate deviation value; the greater the rate deviation value, the greater the intake time compensation value.

[0081] Determine the compensation duration according to the intake time compensation value and the valve opening duration of the intermediate shaft brake intake valve.

[0082] When the compensation duration is less than or equal to the duration threshold, update the valve opening duration of the intermediate shaft brake intake valve to the compensation duration.

[0083] In this optional embodiment, processing operations are provided when the compensated air pressure value is greater than the air pressure threshold: determine the intake time compensation value according to the rate deviation value, where the greater the rate deviation value, the greater the intake time compensation value. Specifically, add the intake time compensation value to the current valve opening duration of the intermediate shaft brake intake valve to obtain the compensation duration. However, if the intermediate shaft brake component is damaged, only increasing the valve opening duration cannot meet the braking requirements, and the braking time will be too long due to continuously increasing the valve opening duration. Therefore, it is necessary to preset the duration threshold. After determining the compensation duration according to the intake time compensation value and the valve opening duration of the intermediate shaft brake intake valve, it is necessary to compare the compensation duration with the duration threshold. When the compensation duration is less than or equal to the duration threshold, update the valve opening duration of the intermediate shaft brake intake valve to the compensation duration, which can avoid too long braking duration.

[0084] The technical solution of the embodiment of the present invention obtains the initial speed of the intermediate shaft before braking, the gearbox oil temperature, the front auxiliary box gear position, and the braking speed of the intermediate shaft after braking based on the preset braking parameters. Then, according to the initial speed, the braking speed, and the valve opening duration of the intermediate shaft brake intake valve in the preset braking parameters, determine the actual deceleration rate, and according to the intermediate shaft brake friction coefficient, the intake air pressure of the intermediate shaft brake intake valve, the pressure coefficient under the intake air pressure, and the oil temperature compensation coefficient corresponding to the gearbox oil temperature, determine the current braking torque. Finally, according to the front auxiliary box gear position and the current braking torque, determine the expected deceleration rate, and adjust the preset braking parameters according to the actual deceleration rate and the expected deceleration rate. By monitoring and compensating the working state of the intermediate shaft brake, the smoothness of the shifting process and the braking efficiency can be ensured.

[0085] Embodiment III

[0086] Figure 3 This is a schematic structural diagram of an intermediate shaft brake self-learning device provided in Embodiment III of the present invention. As Figure 3 shown, the device includes:

[0087] An intermediate shaft parameter acquisition module 310, configured to acquire the initial speed of the intermediate shaft before braking, the gearbox oil temperature, the front auxiliary box gear position, and the braking speed of the intermediate shaft after braking based on the preset braking parameters;

[0088] An actual speed determination module 320, configured to determine an actual deceleration rate according to the initial speed, the braking speed, and a preset braking parameter;

[0089] A braking torque determination module 330, configured to determine a current braking torque according to a friction coefficient of an intermediate shaft brake, a preset braking parameter, and an oil temperature compensation coefficient corresponding to a gearbox oil temperature;

[0090] A braking parameter adjustment module 340, configured to determine an expected deceleration rate according to the front auxiliary box gear position and the current braking torque, and adjust the preset braking parameter according to the actual deceleration rate and the expected deceleration rate.

[0091] The technical solution of the embodiment of the present invention obtains the initial speed of the intermediate shaft before braking, the gearbox oil temperature, the front auxiliary box gear position, and the braking speed of the intermediate shaft after braking based on a preset braking parameter, and then determines the actual deceleration rate according to the initial speed, the braking speed, and the preset braking parameter, and determines the current braking torque according to the friction coefficient of the intermediate shaft brake, the preset braking parameter, and the oil temperature compensation coefficient corresponding to the gearbox oil temperature. Finally, according to the front auxiliary box gear position and the current braking torque, the expected deceleration rate is determined, and the preset braking parameter is adjusted according to the actual deceleration rate and the expected deceleration rate. By monitoring and compensating and adjusting the working state of the intermediate shaft brake, the smoothness of the shifting process and the braking efficiency can be ensured.

[0092] Optionally, the preset braking parameter includes an intake air pressure and an open valve duration of an intake valve of the intermediate shaft brake;

[0093] The actual speed determination module 320 is specifically configured to:

[0094] Determine the actual deceleration rate according to the initial speed, the braking speed, and the open valve duration of the intake valve of the intermediate shaft brake.

[0095] Optionally, the braking torque determination module 330 is specifically configured to:

[0096] Determine the current braking torque according to the friction coefficient of the intermediate shaft brake, the intake air pressure of the intake valve of the intermediate shaft brake, the pressure coefficient under the intake air pressure, and the oil temperature compensation coefficient corresponding to the gearbox oil temperature.

[0097] Optionally, the braking parameter adjustment module 340 includes:

[0098] A correlation relationship determination unit, configured to determine a correlation relationship between the braking torque and the expected deceleration rate according to the front auxiliary box gear position;

[0099] An expected speed determination unit, configured to determine the expected deceleration rate corresponding to the current braking torque according to the correlation relationship between the braking torque and the expected deceleration rate.

[0100] Optionally, the braking parameter adjustment module 340 further includes:

[0101] A deviation determination unit for calculating a rate deviation value between the actual deceleration rate and the desired deceleration rate;

[0102] An air pressure compensation value determination unit for determining an intake air pressure compensation value according to the rate deviation value; the greater the rate deviation value, the greater the intake air pressure compensation value;

[0103] A compensated air pressure determination unit for determining a compensated air pressure value according to the intake air pressure compensation value and the intake air pressure of the intermediate shaft brake intake valve;

[0104] An air pressure update unit for updating the intake air pressure of the intermediate shaft brake intake valve to the compensated air pressure value when the compensated air pressure value is less than or equal to the air pressure threshold.

[0105] Optionally, the braking parameter adjustment module 340 further includes:

[0106] A time compensation value determination unit for determining an intake time compensation value according to the rate deviation value when the compensated air pressure value is greater than the air pressure threshold; the greater the rate deviation value, the greater the intake time compensation value;

[0107] A compensated time determination unit for determining a compensated duration according to the intake time compensation value and the valve opening duration of the intermediate shaft brake intake valve;

[0108] A duration update unit for updating the valve opening duration of the intermediate shaft brake intake valve to the compensated duration when the compensated duration is less than or equal to the duration threshold.

[0109] Optionally, the intermediate shaft brake self-learning device further includes:

[0110] A vehicle state acquisition module for acquiring the current gear state, handle position, vehicle output shaft speed, and engine speed of the vehicle before obtaining the initial speed of the intermediate shaft before braking;

[0111] A self-learning condition judgment unit for determining that the self-learning condition of the intermediate shaft brake is satisfied when the current gear state and the hand position of the vehicle are both in neutral, and the vehicle output shaft speed and the engine speed are both 0.

[0112] Optionally, the calculation formula of the braking torque is as follows:

[0113] M = μ(k × P) - i

[0114] Wherein, M is the current braking torque, P is the intake air pressure of the intermediate shaft brake intake valve, μ is the pressure coefficient under the intake air pressure, and i is the oil temperature compensation coefficient corresponding to the transmission oil temperature.

[0115] Optionally, the intermediate shaft brake self-learning device further includes:

[0116] A deviation determination module, configured to calculate a rate deviation value between the actual deceleration rate and the expected deceleration rate after determining the expected deceleration rate according to the front auxiliary box gear position and the current braking torque;

[0117] A fault prompt module, configured to perform a fault diagnosis prompt when the rate deviation value is greater than the deviation threshold.

[0118] The intermediate shaft brake self-learning device provided by the embodiments of the present invention can execute the intermediate shaft brake self-learning method provided by any embodiment of the present invention, and has corresponding functional modules and beneficial effects for executing the method.

[0119] In the technical solution of the present invention, the collected information is information and data authorized by the user or fully authorized by all parties, and the collection, storage, use, processing, transmission, provision, disclosure, and application of relevant data, etc., all comply with the relevant laws, regulations, and standards of relevant countries and regions, take necessary confidentiality measures, do not violate public order and good customs, and provide corresponding operation entrances for users to choose to authorize or refuse.

[0120] Embodiment 4

[0121] According to an embodiment of the present invention, the present invention also provides an electronic device, a readable storage medium, and a computer program product.

[0122] Figure 4 FIG. shows a schematic structural diagram of an electronic device 10 that can be used to implement the embodiments of the present invention. The electronic device is intended to represent various forms of digital computers, such as, a laptop computer, a desktop computer, a workbench, a personal digital assistant, an applicator, a blade applicator, a mainframe computer, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as, a personal digital processor, a cellular phone, a smart phone, a wearable device (such as a helmet, glasses, a watch, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are only examples and are not intended to limit the implementation of the present invention described and / or claimed herein.

[0123] As Figure 4As shown, the electronic device 10 includes at least one processor 11 and a memory communicatively connected to the at least one processor 11, such as read-only memory (ROM) 12, random access memory (RAM) 13, etc. The memory stores computer programs executable by the at least one processor. The processor 11 can execute various appropriate actions and processes according to the computer programs stored in the read-only memory (ROM) 12 or the computer programs loaded from the storage unit 18 into the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, ROM 12, and RAM 13 are connected to each other via a bus 14. The input / output (I / O) interface 15 is also connected to the bus 14.

[0124] Multiple components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a magnetic disk, an optical disc, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0125] The processor 11 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the intermediate shaft brake self-learning method.

[0126] In some embodiments, the intermediate shaft brake self-learning method can be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed onto the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the intermediate shaft brake self-learning method described above can be executed. Alternatively, in other embodiments, the processor 11 can be configured to execute the intermediate shaft brake self-learning method by any other appropriate means (e.g., by means of firmware).

[0127] The various embodiments of the systems and techniques described above in this document can be implemented in digital electronic circuitry, integrated circuit systems, field programmable gate arrays (FPGA), application specific integrated circuits (ASIC), application specific standard products (ASSP), systems on a chip (SOC), complex programmable logic devices (CPLD), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include: being implemented in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be a special-purpose or general-purpose programmable processor that receives data and instructions from a storage system, at least one input device, and at least one output device, and transmits the data and instructions to the storage system, the at least one input device, and the at least one output device.

[0128] The computer programs for implementing the methods of the present invention can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, a special purpose computer, or other programmable data processing device, such that the computer programs, when executed by the processor, cause the functions / operations specified in the flowchart and / or block diagram to be implemented. The computer programs can be executed entirely on the machine, partially on the machine, as a stand-alone software package partially on the machine and partially on a remote machine, or entirely on the remote machine or appliance.

[0129] In the context of the present invention, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer-readable storage medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, the computer-readable storage medium can be a machine-readable signal medium. More specific examples of the machine-readable storage medium would include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the foregoing.

[0130] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which the user can provide input to the electronic device. Other kinds of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0131] The systems and techniques described herein can be implemented in a computing system including backend components (e.g., as a data applicator), or a computing system including middleware components (e.g., an application applicator), or a computing system including frontend components (e.g., a user computer having a graphical user interface or a web browser through which the user can interact with an implementation of the systems and techniques described herein), or a computing system including any combination of such backend components, middleware components, or frontend components. The components of the system can be interconnected to each other by digital data communication in any form or medium (e.g., a communication network). Examples of communication networks include: local area network (LAN), wide area network (WAN), blockchain network, and the Internet.

[0132] The computing system can include a client and an applicator. The client and the applicator are generally far from each other and usually interact through a communication network. The relationship between the client and the applicator is created by computer programs running on respective computers and having a client-applicator relationship with each other. The applicator can be a cloud applicator, also known as a cloud computing applicator or a cloud host, which is a host product in the cloud computing application system and solves the defects of difficult management and weak business scalability existing in traditional physical hosts and VPS applications.

[0133] It should be understood that various forms of the processes shown above can be used, with steps reordered, added, or deleted. For example, the steps recited in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is imposed herein.

[0134] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A self-learning method for an intermediate shaft brake, characterized in that: include: Obtaining the initial speed of the intermediate shaft before braking, the gearbox oil temperature, the front auxiliary gear position, and the braking speed of the intermediate shaft after braking based on preset braking parameters; determining an actual deceleration rate according to the initial speed, the braking speed and the preset braking parameters; Determine the current braking torque according to the friction coefficient of the intermediate shaft brake, the preset braking parameters and the oil temperature compensation coefficient corresponding to the gearbox oil temperature; The expected deceleration rate is determined according to the front auxiliary gear position and the current braking torque, and the preset braking parameter is adjusted according to the actual deceleration rate and the expected deceleration rate.

2. The method according to claim 1, characterized in that: The preset braking parameters include the intake air pressure and valve opening time of the intermediate shaft brake intake valve; Determining an actual deceleration rate according to the initial speed, the braking speed and the preset braking parameters includes: The actual deceleration rate is determined according to the initial rotation speed, the braking rotation speed and the opening time of the intermediate shaft brake intake valve.

3. The method according to claim 2, characterized in that The current braking torque is determined based on the friction coefficient of the intermediate shaft brake, the preset braking parameters, and the oil temperature compensation coefficient corresponding to the gearbox oil temperature, including: The current braking torque is determined according to the friction coefficient of the intermediate shaft brake, the intake air pressure of the intermediate shaft brake intake valve, the pressure coefficient under the intake air pressure, and the oil temperature compensation coefficient corresponding to the gearbox oil temperature.

4. The method according to claim 1, characterized in that: Determining the expected deceleration rate according to the front auxiliary gearbox gear position and the current braking torque includes: Determining a correlation between the braking torque and the expected deceleration rate according to the front auxiliary gearbox gear position; The expected deceleration rate corresponding to the current braking torque is determined according to the correlation between the braking torque and the expected deceleration rate.

5. The method according to claim 2, characterized in that: According to the actual deceleration rate and the expected deceleration rate, adjusting the preset braking parameter comprises: Calculating a rate deviation value between the actual deceleration rate and the expected deceleration rate; Determining an intake air pressure compensation value according to the speed deviation value; the larger the speed deviation value is, the larger the intake air pressure compensation value is; Determining a compensation pressure value according to the intake pressure compensation value and the intake pressure of the intermediate shaft brake intake valve; When the compensation air pressure value is less than or equal to the air pressure threshold, the intake air pressure of the intermediate shaft brake intake valve is updated to the compensation air pressure value.

6. The method according to claim 5, characterized in that Also includes: When the compensated air pressure value is greater than the air pressure threshold, the intake time compensation value is determined according to the rate deviation value; the larger the rate deviation value is, the larger the intake time compensation value is; Determining a compensation time length according to the intake time compensation value and the opening time length of the intermediate shaft brake intake valve; When the compensation time is less than or equal to the time threshold, the valve opening time of the intermediate shaft brake intake valve is updated to the compensation time.

7. The method according to claim 1, characterized in that Before obtaining the initial speed of the intermediate shaft before braking, it also includes: Get the vehicle's current gear status, handle position, vehicle output shaft speed, and engine speed; When the current gear state and the hand position of the vehicle are both neutral, and the output shaft speed and the engine speed of the vehicle are both 0, it is determined that the intermediate shaft brake self-learning condition is met.

8. The method according to claim 3, characterized in that The calculation formula of the braking torque is as follows: M=μ(k×P)-i Among them, M is the current braking torque, P is the intake pressure of the intermediate shaft brake intake valve, μ is the pressure coefficient under the intake pressure, and i is the oil temperature compensation coefficient corresponding to the gearbox oil temperature.

9. The method according to claim 1, characterized in that: After determining the expected deceleration rate according to the front auxiliary gearbox gear position and the current braking torque, the method further includes: Calculating a rate deviation value between the actual deceleration rate and the expected deceleration rate; When the rate deviation value is greater than the deviation threshold, a fault diagnosis prompt is given.

10. An intermediate shaft brake self-learning device, characterized in that: include: The intermediate shaft parameter acquisition module is used to obtain the initial rotation speed of the intermediate shaft before braking, the gearbox oil temperature, the front auxiliary gear position, and the braking rotation speed of the intermediate shaft after braking based on preset braking parameters; an actual speed determination module, used to determine an actual deceleration rate according to the initial speed, the braking speed and the preset braking parameters; A braking torque determination module, used to determine the current braking torque according to the friction coefficient of the intermediate shaft brake, the preset braking parameters and the oil temperature compensation coefficient corresponding to the gearbox oil temperature; The braking parameter adjustment module is used to determine the expected deceleration rate according to the front auxiliary gear position and the current braking torque, and adjust the preset braking parameter according to the actual deceleration rate and the expected deceleration rate.

11. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can perform the intermediate shaft brake self-learning method according to any one of claims 1 to 9.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the intermediate shaft brake self-learning method according to any one of claims 1 to 9 when executed.

13. A computer program product, characterized in that The computer program product comprises a computer program, which, when executed by a processor, implements the intermediate shaft brake self-learning method according to any one of claims 1-9.

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