AMT pneumatic actuator gear jam fault diagnosis method and system

Abstract

This invention discloses a method and system for diagnosing shift jamming faults in AMT pneumatic actuators, belonging to the field of AMT transmission technology. The system receives a shift request and acquires the current gear position. If it is neutral, the main air intake valve is opened and a timer is started. After the timer ends, the main air pressure is checked. If the pressure reaches the target value, the initial pressure is recorded. The shift solenoid valve is opened, and the actuator position is acquired in real time, and the movement speed is calculated. If the actuator movement speed is not greater than a preset minimum speed and has not reached the shift completion position, the air pressure at two timing points is recorded, and the initial and secondary air pressure differences are calculated. The real-time atmospheric pressure is compared with a preset atmospheric pressure threshold. Based on the air pressure difference and the air pressure threshold, the fault type is determined: if the secondary air pressure difference and the third air pressure value meet the corresponding conditions, it is determined to be a non-leakage shift jamming fault or a shift jamming fault caused by leakage, respectively. This invention relies on air pressure in the air circuit and actuator movement parameters to complete fault classification, resulting in efficient and accurate diagnosis and reducing transmission maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of AMT transmission technology, and in particular to a method for diagnosing shift jamming faults in AMT pneumatic actuators, a system for diagnosing shift jamming faults in AMT pneumatic actuators, electronic equipment, and storage medium. Background Technology

[0002] AMT (Automated Manual Transmission) is a type of transmission that can automatically shift gears based on vehicle operating conditions and road conditions. With drivers increasingly seeking comfort and reduced workload, more and more commercial vehicles are choosing to equip themselves with AMT products. However, various malfunctions frequently occur during AMT shifting. One such malfunction is that the AMT shift actuator fails to complete the shifting action according to control commands, resulting in shifting jamming. When this type of malfunction occurs, it is necessary to promptly diagnose the cause of the AMT shifting jamming malfunction. Once the cause of the AMT shifting jamming malfunction is confirmed, appropriate countermeasures should be taken to resolve the malfunction as quickly as possible. If it is determined that the malfunction cannot be resolved automatically, the driver should be informed to stop the vehicle.

[0003] Existing technologies primarily utilize the difference in shift displacement between the mechanical dead position of the corresponding gear in the shifting mechanism and the positioning structure of the pneumatic mechanism for fault diagnosis. However, this requires the shifting actuator to reach the locked position and cannot diagnose shifting jamming caused by synchronizer ring failure or air leakage during the tooth-mounting process. Furthermore, existing technologies lack methods for diagnosing shifting jamming faults that occur during the shifting process when the pneumatic actuator has not yet reached the shift completion position, and the jamming occurs at the position of the sliding sleeve tooth, synchronizer ring, or tooth-mounting mechanism.

[0004] Chinese patent CN114607677A discloses a shift piston cylinder system and its fault detection method. This method establishes pressure in the corresponding gear chamber, causing the pneumatic mechanism to reach the mechanical dead position of the shift mechanism. At this point, the corresponding valve body is closed. If the corresponding air passage, chamber, and solenoid valve have good sealing performance, the pneumatic mechanism will not displace under pressure. A fault detection method is established using this characteristic. However, this method requires the pneumatic mechanism to reach the mechanical dead position of the shift mechanism, and it cannot diagnose shift jamming caused by failure of the sliding sleeve tooth jacking, synchronizer ring failure, or air leakage during tooth jacking when the mechanical dead position is not reached. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a method for diagnosing shifting jamming faults in AMT pneumatic actuators, a system for diagnosing shifting jamming faults in AMT pneumatic actuators, electronic equipment, and a storage medium. This aims to solve the problem in existing related technologies where shifting jamming occurs at the position of the sliding sleeve top tooth, synchronizer ring, or top tooth before the pneumatic actuator has reached the shift completion position during shifting. This prevents incorrect fault diagnosis and improves the accuracy of fault diagnosis.

[0006] This invention provides the following solution:

[0007] According to one aspect of the present invention, a method for diagnosing shift jamming faults in an AMT pneumatic actuator is provided, comprising the following steps:

[0008] In response to a gear shift request, obtain the current gear information and determine whether it is in neutral.

[0009] If it is in neutral, the main air intake will be turned on and the target timer will be started.

[0010] When the target timer duration reaches the first preset duration, the real-time air pressure of the main air path is detected.

[0011] If the real-time air pressure in the main air path reaches the preset air pressure value, then record the current air pressure in the main air path as the initial air pressure value;

[0012] The gear shift solenoid valve is opened, the current position of the gear shift actuator is collected in real time, and the speed of the gear shift actuator is calculated and determined.

[0013] When the movement speed is less than or equal to the preset minimum speed, and the current position of the shift actuator is less than the preset shift completion position, the current main air pressure is recorded as the second air pressure value, and the first air pressure difference between the initial air pressure value and the second air pressure value is calculated, and the second timing is started at the same time.

[0014] When the timing reaches the second preset duration and the shift actuator is still not in place, the third air pressure value is recorded and the secondary air pressure difference between the second air pressure value and the third air pressure value is calculated.

[0015] Determine whether the shifting sticking is caused by air leakage based on the secondary air pressure difference, the primary air pressure difference and the preset air pressure value or the third air pressure value, the current atmospheric pressure value and the preset air pressure value.

[0016] Furthermore, determining whether the current gear is neutral also includes:

[0017] If the current gear is not neutral, the shift actuator is controlled to perform the disengagement action, switching the non-neutral gear to neutral.

[0018] Furthermore, if the secondary pressure difference is not greater than the sum of the primary pressure difference and the preset pressure value, or the third pressure value is not less than the sum of the current atmospheric pressure value and the preset atmospheric pressure value, then it is determined to be a non-leakage type shift jam.

[0019] Furthermore, the current gear position signal is acquired by the gear selection position sensor and the shift position sensor, and the current gear position is obtained by looking up a pre-stored lookup table.

[0020] Furthermore, the first preset duration is the main gas path pressure stabilization duration, which is used to ensure that the internal gas pressure of the main gas path is in a stable state.

[0021] Furthermore, non-air leakage type shift jamming fault is a mechanical jamming fault caused by the failure of the sliding sleeve top tooth or synchronizer ring.

[0022] The air leakage type of shifting jamming fault is an air leakage fault caused by the failure of the air circuit pipeline, solenoid valve, and pneumatic cylinder block seal.

[0023] According to a second aspect of the present invention, an AMT pneumatic actuator shift jamming fault diagnosis system is provided, comprising:

[0024] The system includes a gear position acquisition module, an air circuit control module, a timing module, an air pressure detection module, a position acquisition module, a calculation and processing module, and a fault determination module.

[0025] The gear position acquisition module is used to receive gear shift requests, acquire the current gear position signal, and determine whether the current gear is neutral.

[0026] The air circuit control module is connected to the gear position acquisition module. When the current gear position is neutral, it controls the opening of the main air circuit intake valve.

[0027] The timing module includes a first timing unit and a second timing unit, wherein the first timing unit is activated after the main air intake valve is opened;

[0028] The air pressure detection module is connected to the timing module. When the timing duration of the first timing unit reaches the first preset duration, the real-time air pressure of the main air path is detected. If the real-time air pressure of the main air path is not lower than the preset working air pressure value, the real-time air pressure is recorded as the initial air pressure value.

[0029] The pneumatic control module is also used to open the gear shift solenoid valve; the position acquisition module is used to acquire the position data of the gear shift actuator in real time.

[0030] The calculation and processing module is electrically connected to the position acquisition module and is used to calculate the movement speed of the shift actuator based on the position data; when the movement speed of the shift actuator is less than or equal to the preset minimum movement speed, the current position of the shift actuator is compared with the preset shift completion position.

[0031] If the current position of the shift actuator is less than the preset shift completion position, the air pressure detection module records the current main air pressure as the second air pressure value, the calculation and processing module calculates the first air pressure difference value, and the second timing unit is started at the same time.

[0032] When the timing duration of the second timing unit reaches the second preset duration, and the shift actuator has not yet reached the preset shift completion position, the air pressure detection module records the current main air pressure as the third air pressure value, and the calculation processing module calculates the secondary air pressure difference value.

[0033] The fault determination module is connected to the calculation and processing module and the air pressure detection module respectively. It is used to determine whether the shifting jam is caused by air leakage based on the secondary air pressure difference, the primary air pressure difference and the preset air pressure value or the third air pressure value, the current atmospheric pressure value and the preset air pressure value.

[0034] According to three aspects of the present invention, an electronic device is provided, comprising: a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus;

[0035] The memory stores a computer program, which, when executed by the processor, causes the processor to perform the steps of a method for diagnosing shift jamming faults in an AMT pneumatic actuator.

[0036] According to four aspects of the present invention, a computer-readable storage medium is provided that stores a computer program executable by an electronic device, which, when run on the electronic device, causes the electronic device to perform the steps of a method for diagnosing shift jamming faults in an AMT pneumatic actuator.

[0037] Compared with the prior art, the present invention has the following advantages:

[0038] This invention determines whether a sliding sleeve tooth jamming, synchronizer ring failure, or tooth jamming occurs during the shifting process by measuring the movement speed and position of the pneumatic shifting actuator. By collecting the movement speed and position, it quickly locates the position where shifting jamming occurs, thus solving the diagnosis of shifting jamming faults under specific conditions.

[0039] This invention improves diagnostic accuracy by judging the main air pressure and controlling the main air solenoid valve, assuming no faults in the main air pressure. It calculates the difference between the air pressure at the moment of sliding sleeve tooth engagement, synchronizer ring failure, or tooth engagement and the initial air pressure in the main air path, as well as the difference between the air pressure after a delay and the air pressure at the moment of engagement. Using these two differences as the basis for judgment solves the problem of erroneous diagnosis caused by relying solely on a single air pressure change difference in existing related technologies.

[0040] This invention records the main air pressure value after a sliding sleeve top tooth, synchronizer ring failure, or top tooth delay occurs, and compares it with the current atmospheric pressure value. This avoids erroneous diagnosis caused by air pressure changes and ensures the accuracy of diagnosis. Attached Figure Description

[0041] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0042] Figure 1 This is a flowchart of a method for diagnosing shift jamming faults in an AMT pneumatic actuator, provided by one or more embodiments of the present invention.

[0043] Figure 2 This is a structural diagram of an AMT pneumatic actuator shifting jamming fault diagnosis system provided by one or more embodiments of the present invention.

[0044] Figure 3 This is a flowchart of a method for diagnosing shift jamming faults in an AMT pneumatic actuator, provided in a specific embodiment of the present invention.

[0045] Figure 4 This is an electronic device structural block diagram of an AMT pneumatic actuator shifting jamming fault diagnosis method provided by one or more embodiments of the present invention. Detailed Implementation

[0046] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0048] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0049] It should be understood that although the terms first, second, third, etc., may be used in the embodiments of the present invention, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, first may also be referred to as second without departing from the scope of the embodiments of the present invention, and similarly, second may also be referred to as first.

[0050] Depending on the context, the words "if" or "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrases "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0051] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0052] Figure 1 This is a flowchart of a method for diagnosing shift jamming faults in an AMT pneumatic actuator, provided by one or more embodiments of the present invention.

[0053] like Figure 1 As shown, it includes the following steps:

[0054] Step S1: In response to the gear shift request, obtain the current gear information and determine whether it is in neutral.

[0055] Step S2: Determine whether the current gear is neutral;

[0056] If it is in neutral, the main air intake will be turned on and the target timer will be started.

[0057] Step S3: When the target timer duration reaches the first preset duration, detect the real-time air pressure of the main air path;

[0058] If the real-time air pressure in the main air path reaches the preset air pressure value, then record the current air pressure in the main air path as the initial air pressure value;

[0059] Step S4: Control the gear shifting solenoid valve to open, collect the position of the gear shifting actuator in real time, and calculate and determine the movement speed of the gear shifting actuator;

[0060] When the movement speed is less than or equal to the preset minimum speed, the current position of the shift actuator is compared with the preset shift completion position;

[0061] If the current position of the shift actuator is less than the preset shift completion position, the current main air pressure is recorded as the second air pressure value and the first air pressure difference is calculated, and the second timing is started at the same time;

[0062] Step S5: When the timing reaches the second preset time and the shift actuator is still not in place, record the third air pressure value and calculate the secondary air pressure difference;

[0063] Step S6: Determine whether the gear shifting jam is caused by air leakage based on the secondary air pressure difference, the primary air pressure difference and the preset air pressure value or the third air pressure value, the current atmospheric pressure value and the preset air pressure value.

[0064] Specifically, through a four-layer progressive verification logic—pre-shift air source verification, speed + position recognition of mechanical jamming during shifting, dual-stage differential pressure joint judgment, and secondary verification based on atmospheric pressure reference—it addresses the shortcomings of existing technologies in identifying synchronous / top gear jamming during shifting. Furthermore, it completely solves the problem of high false alarm rate in single differential pressure diagnosis through multi-dimensional air pressure criteria. It can also accurately distinguish between mechanical blockage and pipeline leakage, possessing multiple technical advantages such as accurate fault location, strong anti-interference capability, ability to differentiate fault types, and compatibility with real-time calculations in vehicle electronic control systems.

[0065] Figure 2 This is a structural diagram of an AMT pneumatic actuator shifting jamming fault diagnosis system provided by one or more embodiments of the present invention.

[0066] like Figure 2 As shown, it includes:

[0067] The system includes a gear position acquisition module, an air circuit control module, a timing module, an air pressure detection module, a position acquisition module, a calculation and processing module, and a fault determination module.

[0068] The gear position acquisition module is used to receive gear shift requests, acquire the current gear position signal, and determine whether the current gear is neutral.

[0069] The air circuit control module is connected to the gear position acquisition module. When the current gear position is neutral, it controls the opening of the main air circuit intake valve.

[0070] The timing module includes a first timing unit and a second timing unit, wherein the first timing unit is activated after the main air intake valve is opened;

[0071] The air pressure detection module is connected to the timing module. When the timing duration of the first timing unit reaches the first preset duration, the real-time air pressure of the main air path is detected. If the real-time air pressure of the main air path is not lower than the preset working air pressure value, the real-time air pressure is recorded as the initial air pressure value.

[0072] The pneumatic control module is also used to open the gear shift solenoid valve; the position acquisition module is used to acquire the position data of the gear shift actuator in real time.

[0073] The calculation and processing module is electrically connected to the position acquisition module and is used to calculate the movement speed of the shift actuator based on the position data; when the movement speed of the shift actuator is less than or equal to the preset minimum movement speed, the current position of the shift actuator is compared with the preset shift completion position.

[0074] If the current position of the shift actuator is less than the preset shift completion position, the air pressure detection module records the current main air pressure as the second air pressure value, the calculation and processing module calculates the first air pressure difference value, and the second timing unit is started at the same time.

[0075] When the timing duration of the second timing unit reaches the second preset duration, and the shift actuator has not yet reached the preset shift completion position, the air pressure detection module records the current main air pressure as the third air pressure value, and the calculation processing module calculates the secondary air pressure difference value.

[0076] The fault determination module is connected to the calculation and processing module and the air pressure detection module respectively. It is used to determine whether the shifting jam is caused by air leakage based on the secondary air pressure difference, the primary air pressure difference and the preset air pressure value or the third air pressure value, the current atmospheric pressure value and the preset air pressure value.

[0077] It is worth noting that although only some basic functional modules are disclosed in this embodiment, it does not mean that the composition of this system is limited to the above-mentioned basic functional modules. On the contrary, what this embodiment intends to express is that, based on the above-mentioned basic functional modules, those skilled in the art can arbitrarily add one or more functional modules in combination with existing technology to form an infinite number of embodiments or technical solutions. That is to say, this system is open rather than closed. The fact that this embodiment only discloses a few basic functional modules does not mean that the scope of protection of the claims of this invention is limited to the disclosed basic functional modules. At the same time, for the convenience of description, the above device is described separately according to its functions as various units and modules. Of course, in implementing this invention, the functions of each unit and module can be implemented in one or more software and / or hardware.

[0078] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0079] Figure 3 This is a flowchart of a method for diagnosing shift jamming faults in an AMT pneumatic actuator, provided in a specific embodiment of the present invention.

[0080] like Figure 3 As shown, it includes the following steps:

[0081] At the start moment, the current gear CG is obtained. The current gear CG of the AMT is obtained by looking up the values ​​fed back by the current gear selection position sensor and the shift position sensor.

[0082] Determine if the current gear CG is equal to neutral (N). If the current gear CG of the AMT is not equal to neutral (N), control the shift actuator to complete the disengagement action; if the current gear CG of the AMT is equal to neutral (N), proceed to the next step.

[0083] Open the main air intake valve and start the timer;

[0084] Get the current timer time t. If the timer time t is less than the preset time t0, continue to get the timer time. If the timer time t is greater than or equal to the preset time t0, proceed to the next step.

[0085] Obtain the main air pressure P, and determine the relationship between the main air pressure P and the preset value Py. If the main air pressure P is less than the preset value Py, open the main air solenoid valve; if the main air pressure P is greater than or equal to the preset value Py, record the current main air pressure value. ;

[0086] The gear shift solenoid valve is opened to obtain the position d of the gear shift actuator. The speed V of the actuator is calculated based on the change in position of the gear shift actuator over a period of time.

[0087] Determine the relationship between the actuator's motion speed V and the preset speed Vmin. If the actuator's motion speed V is greater than the preset speed Vmin, then continue to obtain the shift actuator position d and calculate the actuator's motion speed V based on the change in the shift actuator position over a period of time. If the actuator's motion speed V is less than or equal to the preset speed Vmin, then proceed to the next step.

[0088] Obtain the current shift actuator position d, and determine the relationship between the shift actuator position d and the preset shift completion position d1. If the shift actuator position d is greater than or equal to the preset shift completion position d1, then the shift is determined to be without jamming fault; if the shift actuator position d is less than the preset shift completion position d1, then record the current main air circuit pressure value. ;

[0089] Calculate the initial pressure difference Start the timer;

[0090] Get the current timer time t. If the timer time t is less than the preset time t1, continue to get the timer time. If the timer time t is greater than or equal to the preset time t1, proceed to the next step.

[0091] Obtain the current shift actuator position d, and determine the relationship between the current shift actuator position d and the preset shift completion position d1. If the shift actuator position d is greater than or equal to the preset shift completion position d1, then the shift is determined to be without jamming fault; if the shift actuator position d is less than the preset shift completion position d1, then record the current main air circuit pressure value. ;

[0092] Calculate the secondary pressure difference Determine the difference between the secondary pressure difference ΔP1 and the primary pressure difference. In addition to the relationship between the preset pressure offset Py and the relationship between the current main air pressure value P3 and the atmospheric pressure Pd plus the preset pressure offset Py1;

[0093] like Less than or equal to Or P3 is greater than or equal to atmospheric pressure If the fault is not caused by air leakage, then it is determined to be a jamming fault. If ΔP1 is greater than... And P3 is less than atmospheric pressure. If so, it is determined to be a jamming fault caused by air leakage.

[0094] Existing technologies cannot identify jamming faults such as failure of the gear sleeve top tooth or synchronizer ring when the gear shift is not completed midway. This invention relies on the real-time position and speed signals of the pneumatic actuator to directly distinguish whether the jamming occurs at different stages, such as the gear sleeve top tooth or synchronizer ring, thus pinpointing the location of the fault and filling the technological gap of not being able to identify midway jamming.

[0095] By verifying the main air circuit pressure and solenoid valve operating conditions, the interference of basic air circuit faults on the diagnostic results is eliminated; then, the air pressure difference is collected in two segments: the air pressure at the moment of jamming and the initial air pressure difference ΔP, and the air pressure after the delay and the instantaneous air pressure difference ΔP1 of jamming. By jointly judging the two sets of pressure differences, the problem of misdiagnosis that is easy to occur when relying solely on a single pressure difference judgment is solved.

[0096] After the card hysteresis delay, the main air pressure P3 is collected and compared with the atmospheric pressure Pd. Based on the two-stage pressure difference judgment, an air pressure benchmark verification dimension is added to eliminate misjudgment caused by single air pressure fluctuations and further consolidate the accuracy of the entire diagnostic logic.

[0097] Figure 4 This is an electronic device structural block diagram of an AMT pneumatic actuator shifting jamming fault diagnosis method provided by one or more embodiments of the present invention.

[0098] like Figure 4 As shown, the present invention provides an electronic device, including: a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus;

[0099] The memory stores a computer program, which, when executed by the processor, causes the processor to perform the steps of a method for diagnosing shift jamming faults in an AMT pneumatic actuator.

[0100] The present invention also provides a computer-readable storage medium storing a computer program executable by an electronic device, which, when run on the electronic device, causes the electronic device to perform the steps of a method for diagnosing shift jamming faults in an AMT pneumatic actuator.

[0101] For the sake of simplicity, the method embodiments are described as a series of actions. However, those skilled in the art should understand that the embodiments of the present invention are not limited to the described order of actions, because according to the embodiments of the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions involved are not necessarily essential to the embodiments of the present invention.

[0102] As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments of this application.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for diagnosing shifting jamming faults in AMT pneumatic actuators, characterized in that, Includes the following steps: In response to a gear shift request, obtain the current gear information and determine whether it is in neutral. If it is in neutral, the main air intake will be turned on and the target timer will be started. When the target timer duration reaches the first preset duration, the real-time air pressure of the main air path is detected. If the real-time air pressure in the main air path reaches the preset air pressure value, then record the current air pressure in the main air path as the initial air pressure value; The gear shift solenoid valve is opened, the current position of the gear shift actuator is collected in real time, and the speed of the gear shift actuator is calculated and determined. When the movement speed is less than or equal to the preset minimum speed, and the current position of the shift actuator is less than the preset shift completion position, the current main air pressure is recorded as the second air pressure value, and the first air pressure difference between the initial air pressure value and the second air pressure value is calculated, and the second timing is started at the same time. When the timing reaches the second preset duration and the shift actuator has not yet reached its position, the third air pressure value is recorded, and the secondary air pressure difference between the second air pressure value and the third air pressure value is calculated. Determine whether the gear shifting sticking is caused by air leakage based on the secondary air pressure difference, the primary air pressure difference and the preset air pressure value or the third air pressure value, the current atmospheric pressure value and the preset air pressure value.

2. The method for diagnosing shifting jamming faults in an AMT pneumatic actuator according to claim 1, characterized in that, The step of determining whether the current gear is neutral also includes: If the current gear is not neutral, the shift actuator is controlled to perform the disengagement action, switching the non-neutral gear to neutral.

3. The method for diagnosing shifting jamming faults in an AMT pneumatic actuator according to claim 1, characterized in that, include: If the secondary pressure difference is not greater than the sum of the primary pressure difference and the preset pressure value, or the third pressure value is not less than the sum of the current atmospheric pressure value and the preset atmospheric pressure value, then it is determined to be a non-leakage type shift jam.

4. The method for diagnosing shifting jamming faults in an AMT pneumatic actuator according to claim 3, characterized in that, include: The current gear position signal is acquired by the gear selection position sensor and the gear shift position sensor, and the current gear position is obtained by looking up a pre-stored lookup table.

5. The method for diagnosing shifting jamming faults in an AMT pneumatic actuator according to claim 4, characterized in that, include: The first preset duration is the main gas path pressure stabilization duration, which is used to ensure that the internal gas pressure of the main gas path is in a stable state.

6. The method for diagnosing shifting jamming faults in an AMT pneumatic actuator according to claim 5, characterized in that, include: The second preset duration is the retest duration for the stuck state, used to verify whether the stuck state during gear shifting continues.

7. A method for diagnosing shifting jamming faults in an AMT pneumatic actuator according to claim 6, characterized in that, include: The non-air-leaking shifting jamming fault is a mechanical jamming fault caused by the failure of the sliding sleeve top tooth or the synchronizer ring. The air leakage type shifting jamming fault is an air leakage fault caused by the failure of the air circuit pipeline, solenoid valve, and pneumatic cylinder seal.

8. A fault diagnosis system for shifting jamming in an AMT pneumatic actuator, characterized in that, The diagnostic system is used to perform the diagnostic method according to any one of claims 1-7, including: The system includes a gear position acquisition module, an air circuit control module, a timing module, an air pressure detection module, a position acquisition module, a calculation and processing module, and a fault determination module. The gear position acquisition module is used to receive gear shift requests, acquire the current gear position signal, and determine whether the current gear is neutral. The air circuit control module is connected to the gear position acquisition module. When the current gear position is neutral, it controls the opening of the main air circuit intake valve. The timing module includes a first timing unit and a second timing unit, wherein the first timing unit is activated after the main air intake valve is opened; The air pressure detection module is connected to the timing module. When the timing duration of the first timing unit reaches the first preset duration, the real-time air pressure of the main air path is detected. If the real-time air pressure of the main air path is not lower than the preset working air pressure value, the real-time air pressure is recorded as the initial air pressure value. The pneumatic control module is also used to open the gear shift solenoid valve; the position acquisition module is used to acquire the position data of the gear shift actuator in real time. The calculation and processing module is electrically connected to the position acquisition module and is used to calculate the movement speed of the shift actuator based on the position data; when the movement speed of the shift actuator is less than or equal to the preset minimum movement speed, the current position of the shift actuator is compared with the preset shift completion position. If the current position of the shift actuator is less than the preset shift completion position, the air pressure detection module records the current main air pressure as the second air pressure value, the calculation and processing module calculates the first air pressure difference value, and the second timing unit is started at the same time. When the timing duration of the second timing unit reaches the second preset duration, and the shift actuator has not yet reached the preset shift completion position, the air pressure detection module records the current main air pressure as the third air pressure value, and the calculation and processing module calculates the secondary air pressure difference value. The fault determination module is connected to the calculation and processing module and the air pressure detection module respectively, and is used to determine whether the shifting jam is caused by air leakage based on the secondary air pressure difference, the primary air pressure difference and the preset air pressure value or the third air pressure value, the current atmospheric pressure value and the preset air pressure value.

9. An electronic device, characterized in that, include: The processor, communication interface, memory, and communication bus are connected, with the processor, communication interface, and memory communicating with each other via the communication bus. The memory stores a computer program, which, when executed by the processor, causes the processor to perform the steps of the AMT pneumatic actuator shifting jamming fault diagnosis method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, It stores a computer program that can be executed by an electronic device. When the computer program is run on the electronic device, it causes the electronic device to perform the steps of the AMT pneumatic actuator shift jamming fault diagnosis method according to any one of claims 1-7.

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