A method, system and electronic device for detecting a fault in a hydrodynamic torque converter

Abstract

This application relates to the field of vehicle technology, and provides a method, system, and electronic device for detecting faults in a hydraulic torque converter. The method includes the following steps: acquiring pressure data and rotor speed of the hydraulic torque converter under operating conditions; the pressure data includes at least: the inlet pressure of the lock-up clutch fluid, the inlet pressure of the hydraulic circulation cylinder fluid, and the outlet pressure of the hydraulic circulation cylinder fluid; determining the operating state of the lock-up clutch based on the pressure data and rotor speed; the operating state includes at least: engagement state, slip state, and disengagement state; determining the fault level and fault type of the hydraulic torque converter using a preset algorithm based on the first pressure difference and first speed difference obtained from the operating state of the lock-up clutch; and obtaining a corresponding adjustment strategy based on the fault level of the hydraulic torque converter to adjust the output torque of the hydraulic torque converter. This invention solves the technical problem that existing technologies cannot identify early faults in hydraulic torque converters.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a method, system and electronic equipment for detecting faults in a hydraulic torque converter. Background Technology

[0002] As a core component of power transmission, the torque converter is widely used in vehicles with automatic transmissions and construction machinery. Its function is to smoothly transmit the power output from the engine to the transmission, while automatically adjusting and buffering torque to ensure the smoothness and reliability of equipment operation. The torque converter has a complex internal structure, mainly composed of a pump impeller, turbine, stator, lock-up clutch, and hydraulic control circuit. During operation, it relies on the circulation of hydraulic oil to transmit power. Furthermore, its outer casing is often a welded monolithic structure, making direct disassembly for internal inspection difficult, which significantly complicates fault diagnosis.

[0003] Currently, most existing fault diagnosis methods for hydraulic torque converters rely on the experience and judgment of maintenance personnel. They rely on observing abnormal phenomena during equipment operation (such as excessively high oil temperature, weak power, and unusual noises) to initially diagnose faults. This approach suffers from low diagnostic efficiency, poor accuracy, and strong subjectivity, easily leading to misdiagnosis and missed diagnosis, resulting in the escalation of the fault and increased maintenance costs and downtime. Some diagnostic methods are designed only for a single fault type, failing to cover all common faults in hydraulic torque converters. Furthermore, they lack standardized testing procedures and judgment thresholds, making it difficult to adapt to the diagnostic needs of different models and operating conditions of hydraulic torque converters.

[0004] Furthermore, existing diagnostic methods often fail to combine oil level detection with operational parameter detection for coordinated analysis, thus failing to fully reflect the internal working state of the hydraulic torque converter. They also have a weak ability to identify early potential faults, often only discovering them when the fault symptoms become obvious. At this point, internal components have already experienced a certain degree of wear or damage, increasing the difficulty and cost of maintenance.

[0005] Therefore, there is an urgent need for a fault diagnosis method for hydraulic torque converters to address the shortcomings of existing technologies. Summary of the Invention

[0006] The purpose of this invention is to provide a method, system, and electronic device for detecting faults in hydraulic torque converters, thereby solving the technical problem that existing technologies cannot identify early-stage faults in hydraulic torque converters. The specific solution is as follows:

[0007] A method for detecting faults in a hydraulic torque converter includes the following steps:

[0008] S1: Acquire pressure data and impeller speed of the hydraulic torque converter under operating conditions; the pressure data includes at least: lock-up clutch oil inlet pressure, hydraulic circulation circular oil inlet pressure, and hydraulic circulation circular oil outlet pressure; the impeller speed includes: pump impeller speed and turbine speed.

[0009] S2: Determine the operating state of the lock-up clutch based on the pressure data and the rotational speed of the working wheel; the operating state includes at least: engaged state, slipping state, and disengaged state;

[0010] S3: Based on the first pressure difference and first speed difference obtained from the operating state of the lock-up clutch, a preset algorithm is used to determine the fault level and fault type of the hydraulic torque converter;

[0011] S4: Obtain the corresponding adjustment strategy based on the fault level of the hydraulic torque converter to adjust the output torque of the hydraulic torque converter.

[0012] Optionally, S2: Based on pressure data and the rotational speed of the working wheel, determine the operating state of the lock-up clutch; the operating state includes at least: engaged state, slipping state, and disengaged state, specifically including:

[0013] If the first pressure difference between the lock-up clutch oil inlet pressure and the hydraulic circulation circle oil inlet pressure is greater than or equal to the lock-up clutch lock-up pressure setting value, and the pump wheel speed is equal to the turbine speed, then the lock-up clutch is determined to be engaged.

[0014] If the first pressure difference between the lock-up clutch oil inlet pressure and the hydraulic circulation oil inlet pressure is less than the lock-up clutch lock-up pressure setting value and greater than zero, then the lock-up clutch is judged to be in a slip state.

[0015] If the first pressure difference between the inlet pressure of the lock-up clutch oil and the inlet pressure of the hydraulic circulation cylinder oil is less than or equal to zero, and the first speed difference between the pump wheel speed and the turbine speed is greater than zero, then the lock-up clutch is determined to be in a disengaged state.

[0016] Optionally, S3: Based on the first pressure difference and first speed difference obtained from the operating state of the lock-up clutch, a preset algorithm is used to determine the fault level and fault type of the hydraulic torque converter, specifically including:

[0017] When the lock-up clutch is engaged, determine whether the first speed difference is zero;

[0018] If not, determine whether the hydraulic circulation oil outlet pressure P3 falls within the set pressure range;

[0019] If so, the hydraulic torque converter is determined to be a level two fault, and the fault type is wear of the lock-up clutch friction plate;

[0020] If the oil inlet pressure P1 of the lock-up clutch is less than the standard setting value and the first speed difference is greater than the rated threshold, the torque converter is judged to be a level two fault, and the fault type is the first solenoid valve pressure relief or the first oil circuit pressure relief.

[0021] Optionally, S3: Based on the first pressure difference and first speed difference obtained from the operating state of the lock-up clutch, a preset algorithm is used to determine the fault level and fault type of the hydraulic torque converter, specifically including:

[0022] When the lock-up clutch is in a slipping state, if the first speed difference between the pump wheel and the turbine is greater than the rated threshold for a preset time, and the oil inlet pressure P1 of the lock-up clutch is less than the standard set value, then the hydraulic torque converter is judged to be a level two fault, and the fault type is the first solenoid valve pressure relief or the first oil circuit pressure relief.

[0023] If the first speed difference ΔN between the pump impeller and the turbine is greater than the rated threshold, and the oil inlet pressure P1 of the lock-up clutch falls within the set pressure range, then the torque converter is judged to be a level two fault, and the fault type is damage to the pump impeller or turbine blades inside the torque converter.

[0024] Optionally, S3: Based on the first pressure difference and first speed difference obtained from the operating state of the lock-up clutch, a preset algorithm is used to determine the fault level and fault type of the hydraulic torque converter, specifically including:

[0025] When the lock-up clutch is disengaged, determine whether the pump wheel speed falls within the set speed range;

[0026] If so, then determine whether the turbine speed is ≤ the set lower speed threshold;

[0027] If so, the hydraulic torque converter is determined to be a Level 1 fault, and the fault type is pump wheel or turbine blade breakage.

[0028] Optionally, S4: Obtain the corresponding adjustment strategy based on the fault level of the hydraulic torque converter to adjust the output torque of the hydraulic torque converter, specifically including:

[0029] S401: If the fault level of the hydraulic torque converter is greater than or equal to the set level, then obtain the second adjustment strategy;

[0030] S402: In response to the second adjustment strategy, generate a first constraint instruction and a first restriction instruction;

[0031] S403: Based on a first constraint instruction, restrict the vehicle to operate under a first load condition; the first load condition includes at least: a rapid acceleration condition and a high load condition;

[0032] S404: Based on the first limiting command, control the engine torque to be limited and output according to the first preset ratio.

[0033] Optionally, S4: Obtain the corresponding adjustment strategy based on the fault level of the hydraulic torque converter to adjust the output torque of the hydraulic torque converter, specifically including:

[0034] S405: If the fault level of the hydraulic torque converter is less than the set level, then obtain the first adjustment strategy;

[0035] S406: In response to the first adjustment strategy, generate a second restriction instruction and a first emergency prevention instruction;

[0036] S407: Based on the second limiting command, control the engine torque to be limited and output according to a second preset ratio; wherein the second preset ratio is less than the first preset ratio;

[0037] S408: Based on the first emergency prevention command, generate an advanced alarm prompt and control the vehicle to enter emergency driving mode.

[0038] A hydraulic torque converter fault detection system includes:

[0039] The acquisition unit is used to acquire pressure data and impeller speed of the hydraulic torque converter under operating conditions; the pressure data includes at least: lock-up clutch oil inlet pressure P1, hydraulic circulation circular oil inlet pressure P2, and hydraulic circulation circular oil outlet pressure P3; the impeller speed includes: pump impeller speed Np and turbine speed Nt.

[0040] The judgment unit is used to determine the operating state of the lock-up clutch based on pressure data and the rotational speed of the working wheel; the operating state includes at least: engaged state, slipping state, and disengaged state;

[0041] The strategy unit is configured to determine the fault level and fault type of the hydraulic torque converter based on the first pressure difference and first speed difference obtained from the operating state of the lock-up clutch and a preset algorithm.

[0042] The control unit is configured to obtain the corresponding adjustment strategy based on the fault level of the hydraulic torque converter in order to adjust the output torque of the hydraulic torque converter.

[0043] An electronic device includes: 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; characterized in that the memory stores a computer program, which, when executed by the processor, causes the processor to perform the steps of the method.

[0044] 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 the method described herein.

[0045] The above solution achieves the following beneficial technical effects:

[0046] This application provides a method, system, and electronic device for fault detection of a hydraulic torque converter. This application collects three-way pressure information from the lock-up clutch and the hydraulic circulation circle, as well as pump impeller and turbine speed information. Then, based on the pressure, it determines three operating ranges for the lock-up clutch: engagement, slippage, and disengagement. By applying a preset algorithm to the pressure and speed differences within each range, it completes the fault diagnosis of the hydraulic torque converter. For different levels of faults, different adjustment strategies are employed to adjust the output torque of the hydraulic torque converter. The advantages of this design are that, compared to existing technologies, this application reduces the false alarm rate and can take timely protective measures in the early stages of a fault, preventing the hydraulic torque converter from burning out or suffering secondary damage. Attached Figure Description

[0047] Figure 1 A flowchart of a fault detection method for hydraulic torque converters;

[0048] Figure 2 For the hydraulic control circuit of the hydraulic torque converter;

[0049] Figure 3 This is a simplified structural diagram of a hydraulic torque converter. Detailed Implementation

[0050] To make the purpose, technical solution, and advantages of this application clearer, the following will be described in conjunction with the appendix. Figures 1 to 3 This application will be described in further detail. It is obvious that the described embodiments are merely some, not all, of the embodiments described herein. All other embodiments obtained by those skilled in the art based on the embodiments described herein without inventive effort are within the scope of protection of this application.

[0051] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the application. The singular forms “a,” “said,” and “the” used in the embodiments of this application 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.

[0052] 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.

[0053] It should be understood that although the terms first, second, third, etc., may be used in the embodiments of this application, 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 this application, and similarly, second may also be referred to as first.

[0054] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “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” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0055] 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.

[0056] It should be noted that any symbols and / or numbers present in the specification that are not marked in the accompanying drawings are not reference numerals.

[0057] The optional embodiments of this application are described in detail below with reference to the accompanying drawings.

[0058] First, to facilitate understanding of this technical solution, the hydraulic torque converter will be introduced below: Figure 2 The hydraulic control system of the torque converter shown includes a first solenoid valve 1, a first filter 2, a lock-up clutch 3, a first check valve 4, a first throttle valve 5, a hydraulic circulation circle of the torque converter 6, a first mechanical valve 7, a first oil circuit 201, a second oil circuit 202, and a third oil circuit 203.

[0059] like Figure 2 The hydraulic control circuit for the torque converter has three control circuits: the hydraulic circulation circle inlet circuit (i.e., the second circuit), the hydraulic circulation circle outlet circuit (i.e., the third circuit), and the torque converter lock-up clutch control circuit (i.e., the first circuit). The first check valve and the first throttle orifice prevent oil from the hydraulic circulation circle from entering the lock-up clutch and affecting its normal operation.

[0060] The inlet pressure of the lock-up clutch can be changed by altering the command current of the first solenoid valve. The feedback signal from this solenoid valve is the inlet pressure of the lock-up clutch.

[0061] like Figure 3 The diagram shown is a simplified structural schematic of a hydraulic torque converter, which consists of a lock-up clutch 101, a shock absorber 102, a turbine 103, a guide wheel 104, and a pump wheel 105. Figure 3 The three-oil circuit control in the middle corresponds to Figure 2 The three oil circuits are the lock-up clutch oil inlet 111, the hydraulic circulation circular oil inlet 112, and the hydraulic circulation circular oil outlet 113.

[0062] according to Figure 1 The method for detecting faults in a hydraulic torque converter, as shown, includes the following steps:

[0063] S1: Acquire pressure data and impeller speed of the hydraulic torque converter under operating conditions; the pressure data includes at least: lock-up clutch oil inlet pressure P1, hydraulic circulation circular oil inlet pressure P2, and hydraulic circulation circular oil outlet pressure P3; the impeller speed includes: pump impeller speed Np and turbine speed Nt.

[0064] S2: Determine the operating state of the lock-up clutch based on the pressure data and the rotational speed of the working wheel; the operating state includes at least: engaged state, slipping state, and disengaged state;

[0065] S3: Based on the first pressure difference and first speed difference obtained from the operating state of the lock-up clutch, a preset algorithm is used to determine the fault level and fault type of the hydraulic torque converter;

[0066] S4: Obtain the corresponding adjustment strategy based on the fault level of the hydraulic torque converter to adjust the output torque of the hydraulic torque converter.

[0067] Specifically, this application collects three-way pressure information from the lock-up clutch and the hydraulic circulation circle, as well as pump wheel and turbine speed information. Then, based on the pressure, it determines the three operating ranges of the lock-up clutch: engagement, slippage, and disengagement. By applying a preset algorithm to the pressure and speed differences within each range, it completes fault diagnosis of the hydraulic torque converter. For different levels of faults, different adjustment strategies are employed to adjust the output torque of the hydraulic torque converter. The advantage of this design is that, compared to existing technologies, this application reduces the false alarm rate and can take timely protective measures in the early stages of a fault, preventing the hydraulic torque converter from burning out or suffering secondary damage.

[0068] In a specific embodiment, S2: Based on the pressure data and the rotational speed of the working wheel, determine the operating state of the lock-up clutch; the operating state includes at least: engaged state, slipping state, and disengaged state, specifically including:

[0069] If the first pressure difference between the lock-up clutch oil inlet pressure and the hydraulic circulation oil inlet pressure is greater than or equal to the lock-up clutch lock-up pressure setting value (pressure value when the clutch is fully engaged), and the pump wheel speed is equal to the turbine speed, then the lock-up clutch is determined to be engaged.

[0070] If the first pressure difference between the lock-up clutch oil inlet pressure and the hydraulic circulation oil inlet pressure is less than the lock-up clutch lock-up pressure setting value and greater than zero, then the lock-up clutch is judged to be in a slip state.

[0071] If the first pressure difference between the inlet pressure of the lock-up clutch oil and the inlet pressure of the hydraulic circulation cylinder oil is less than or equal to zero, and the first speed difference between the pump wheel speed and the turbine speed is greater than zero, then the lock-up clutch is determined to be in a disengaged state.

[0072] It is understood that this embodiment uses the pressure difference between the lock-up clutch inlet pressure and the hydraulic circulation circle inlet pressure as the main judgment basis, and uses the speed difference between the pump wheel and the turbine for auxiliary judgment. This enables accurate differentiation of the three operating states of the lock-up clutch: engagement, slippage, and disengagement, under different operating conditions. The advantage of this design is that it avoids misjudgment problems caused by oil pressure fluctuations and speed interference, and improves the stability and differentiation accuracy of state recognition. At the same time, through the algorithm of the relationship between pressure difference threshold and speed, accurate determination of the lock-up state is achieved, providing a reliable state basis for the accurate identification of subsequent fault types, thereby improving the response speed and diagnostic reliability of the entire hydraulic torque converter fault detection system.

[0073] For example, the lock-up pressure of the lock-up clutch is the pressure at which the lock-up clutch can be fully locked. When P1-P2≥A, the lock-up clutch is in a fully locked state, Np=Nt. At this time, when A>P1-P2>0, the lock-up clutch is in a sliding state, and the larger the difference between the two, the larger the sliding difference, Np>Nt. When P1-P2<0, the lock-up clutch is in an open state, and the torque converter is in a torque-increasing state, Np>Nt.

[0074] In a specific embodiment, S3: Based on the first pressure difference and first speed difference obtained from the operating state of the lock-up clutch, a preset algorithm is used to determine the fault level and fault type of the hydraulic torque converter, specifically including:

[0075] When the lock-up clutch is engaged, determine whether the first speed difference is zero;

[0076] If not, determine whether the hydraulic circulation oil outlet pressure P3 falls within the set pressure range;

[0077] If so, the hydraulic torque converter is determined to be a level two fault, and the fault type is wear of the lock-up clutch friction plate;

[0078] If the oil inlet pressure P1 of the lock-up clutch is less than the standard setting value and the first speed difference is greater than the rated threshold, the torque converter is judged to be a level two fault, and the fault type is the first solenoid valve pressure relief or the first oil circuit pressure relief.

[0079] Specifically, this application uses whether the first speed difference is zero as a preliminary judgment condition, and then judges the hydraulic circulation circle outlet pressure P3 and the lock-up clutch oil inlet pressure P1. This can accurately distinguish between two typical faults: wear of the clutch's own friction plates and abnormality of the hydraulic control system. It can be understood that when a speed difference occurs in the theoretical lock-up state, it can directly reflect a decrease in the clutch's transmission capacity. Then, by checking whether the hydraulic circulation circle outlet pressure is normal, it can further confirm that the fault is wear failure of the friction plates. At the same time, through the dual judgment of low lock-up clutch oil inlet pressure P1 and excessive speed difference, it can quickly identify the problem of insufficient lock-up pressure caused by solenoid valve or oil circuit pressure leakage.

[0080] For example: when the lock-up clutch is engaged, the rated threshold for speed difference is 50 rpm; the standard setting for P1 is 1.0 MPa; the normal range for P3 is 0.25 to 0.4 MPa; when the first speed difference ΔN between the pump wheel speed and the turbine speed is detected to be ≠ 0, and P3 is 0.32 MPa, the condition is normal, then it is determined that the friction plate of the lock-up clutch is worn.

[0081] If the first speed difference ΔN between the pump wheel speed and the turbine speed is 100 rpm and P1 is 0.6 MPa (too low), then the fault type of the hydraulic torque converter can be determined as: pressure relief in the first solenoid valve or pressure relief in the first oil circuit.

[0082] In a specific embodiment, S3: Based on the first pressure difference and first speed difference obtained from the operating state of the lock-up clutch, a preset algorithm is used to determine the fault level and fault type of the hydraulic torque converter, specifically including:

[0083] When the lock-up clutch is in a slipping state, if the first speed difference between the pump wheel and the turbine is greater than the rated threshold for a preset time, and the oil inlet pressure P1 of the lock-up clutch is less than the standard set value, then the hydraulic torque converter is judged to be a level two fault, and the fault type is the first solenoid valve pressure relief or the first oil circuit pressure relief.

[0084] If the first speed difference ΔN between the pump impeller and the turbine is greater than the rated threshold, and the oil inlet pressure P1 of the lock-up clutch falls within the set pressure range, then the torque converter is judged to be a level two fault, and the fault type is damage to the pump impeller or turbine blades inside the torque converter.

[0085] In this embodiment, under the condition that the lock-up clutch is in a slipping state, by jointly judging the continuous over-limit of the first speed difference and the lock-up clutch inlet pressure P1, it is possible to accurately distinguish between two types of faults based on the working principles of hydraulic transmission and hydraulic control. When the first speed difference is continuously large and P1 is low, it can be directly determined that the lock-up pressure is insufficient due to pressure leakage in the solenoid valve or oil circuit, thus reflecting an abnormality in the hydraulic control system. When the speed difference is large and the lock-up clutch inlet pressure P1 is within the normal range, it is judged that the hydraulic transmission failure is caused by damage to the pump wheel or turbine blades. This design achieves accurate differentiation between control-related faults and mechanical structure faults, avoiding misjudgments and omissions caused by the susceptibility of single speed or pressure signals to interference from operating condition fluctuations, and improving the reliability and accuracy of fault diagnosis.

[0086] For example, continuing the previous example, the rated threshold for speed difference is 50 rpm; the preset time is 2s; the normal range of P1 is 0.8-1.2 MPa; the current state is: slip state; when the first speed difference ΔN is 110 rpm and lasts for 2.5s (> the preset 2s), and P1 is 0.5 MPa which is less than the standard value, then the hydraulic torque converter is judged to have a level two fault, and the fault type is the first solenoid valve pressure relief or the first oil circuit pressure relief; if the first speed difference ΔN is 120 rpm and P1 is 1.0 MPa which is within the normal range, then the fault type is the pump impeller or turbine blade inside the hydraulic torque converter damaged.

[0087] In a specific embodiment, S3: Based on the first pressure difference and first speed difference obtained from the operating state of the lock-up clutch, a preset algorithm is used to determine the fault level and fault type of the hydraulic torque converter, specifically including:

[0088] When the lock-up clutch is disengaged, determine whether the pump wheel speed falls within the set speed range;

[0089] If so, then determine whether the turbine speed is ≤ the set lower speed threshold;

[0090] If so, the hydraulic torque converter is determined to be a Level 1 fault, and the fault type is pump wheel or turbine blade breakage.

[0091] Specifically, in this embodiment, under the hydraulic transmission condition where the lock-up clutch is disengaged, the normal pump wheel speed is used as the benchmark and the extremely low turbine speed is used as the fault judgment basis. This directly reflects the effectiveness of the hydraulic power transmission link inside the hydraulic torque converter, and identifies serious mechanical faults such as blade breakage from the perspective of hydraulic transmission principle. By linking the pump wheel speed and turbine speed for judgment, interference from non-fault factors such as the engine not outputting speed is effectively eliminated, avoiding misjudgment. This achieves rapid and reliable identification of major failure modes such as blade breakage, and can promptly judge the fault as a high-level fault, enabling the system to quickly activate emergency protection strategies and prevent further damage to the equipment, greatly improving the safety and predictive capability of fault detection.

[0092] For example, continuing from the previous example, the normal speed range of the pump wheel is 1000~3000rpm; the lower limit threshold of the turbine speed is 50rpm (≤50 indicates no speed or extremely low speed); the current lock-up clutch status is disengaged; if the pump wheel speed Np is 1500rpm, the status is normal, and the obtained turbine speed is 30rpm, which is lower than the lower limit threshold of the turbine speed, then it is determined that the pump wheel or turbine blade of the lock-up clutch is broken.

[0093] In a specific embodiment, S4: Obtain the corresponding adjustment strategy based on the fault level of the hydraulic torque converter to adjust the output torque of the hydraulic torque converter, specifically including:

[0094] S401: If the fault level of the hydraulic torque converter is greater than or equal to the set level, then obtain the second adjustment strategy;

[0095] S402: In response to the second adjustment strategy, generate a first constraint instruction and a first restriction instruction;

[0096] S403: Based on a first constraint instruction, restrict the vehicle to operate under a first load condition; the first load condition includes at least: a rapid acceleration condition and a high load condition;

[0097] S404: Based on the first limiting command, control the engine torque to be limited and output according to the first preset ratio.

[0098] It is understood that this application adopts a corresponding adjustment strategy based on the fault level of the hydraulic torque converter. When the fault level reaches the set level, by constraining the vehicle's operating conditions and limiting the engine torque output according to a preset ratio, the load and workload of the transmission system can be effectively reduced without interrupting the vehicle's driving ability. This avoids the situation where rapid acceleration, high load and other operating conditions exacerbate clutch slippage, oil circuit pressure leakage and internal mechanical damage. This design can prevent minor faults from further expanding into serious mechanical failures and reduce the risk of secondary damage.

[0099] For example: Level 1 fault: The vehicle applies engine torque limiting, such as reducing the output torque to 50%-60% of the rated value, and prohibits rapid acceleration and high-load operation to avoid the fault from worsening.

[0100] In one specific embodiment, S4: Obtaining a corresponding adjustment strategy based on the fault level of the hydraulic torque converter to adjust the output torque of the hydraulic torque converter, specifically further including:

[0101] S405: If the fault level of the hydraulic torque converter is less than the set level, then obtain the first adjustment strategy;

[0102] S406: In response to the first adjustment strategy, generate a second restriction instruction and a first emergency prevention instruction;

[0103] S407: Based on the second limiting command, control the engine torque to be limited and output according to a second preset ratio; wherein the second preset ratio is less than the first preset ratio;

[0104] S408: Based on the first emergency prevention command, generate an advanced alarm prompt and control the vehicle to enter an emergency driving mode (such as limp mode).

[0105] Specifically, this application achieves deep torque reduction by setting a smaller engine torque limit ratio. Combined with high-level alarm prompts and emergency driving mode control, it can quickly reduce the system load to prevent the fault from worsening when major mechanical faults such as blade breakage are detected, thus fundamentally avoiding secondary damage such as torque converter burn-out and structural damage. Simultaneously, through graded control, it achieves precise matching between fault severity and protection strength. While ensuring extreme protection under severe faults, it also maintains the vehicle's basic emergency driving capability, effectively improving the safety and reliability of the vehicle's fault response and maximizing the safety of passengers and the transmission system. For example, in the case of severe faults (internal oil leakage, lock-up slippage, complete pressure failure): the entire vehicle experiences deep torque reduction (torque drops below 30% of the rated value), triggering an emergency alarm and forcibly entering limp-drive mode to prevent torque converter burn-out and secondary damage.

[0106] On the other hand, this application provides a hydraulic torque converter fault detection system including:

[0107] The acquisition unit is used to acquire pressure data and impeller speed of the hydraulic torque converter under operating conditions; the pressure data includes at least: lock-up clutch oil inlet pressure P1, hydraulic circulation circular oil inlet pressure P2, and hydraulic circulation circular oil outlet pressure P3; the impeller speed includes: pump impeller speed Np and turbine speed Nt.

[0108] The judgment unit is used to determine the operating state of the lock-up clutch based on pressure data and the rotational speed of the working wheel; the operating state includes at least: engaged state, slipping state, and disengaged state;

[0109] The strategy unit is configured to determine the fault level and fault type of the hydraulic torque converter based on the first pressure difference and first speed difference obtained from the operating state of the lock-up clutch and a preset algorithm.

[0110] The control unit is configured to obtain the corresponding adjustment strategy based on the fault level of the hydraulic torque converter in order to adjust the output torque of the hydraulic torque converter.

[0111] On the other hand, this application 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; characterized in that the memory stores a computer program, and when the computer program is executed by the processor, the processor performs the steps of the method.

[0112] On the other hand, this application 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 the method described herein.

[0113] On the other hand, this application provides a vehicle, including:

[0114] An electronic device for implementing the steps of the method;

[0115] A processor that runs a program, and when the program runs, it executes the steps of the method from data output by the electronic device.

[0116] A storage medium for storing a program that, when run, executes the steps of the method on data output from an electronic device.

[0117] 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 detecting faults in a hydraulic torque converter, characterized in that, Includes the following steps: S1: Acquire pressure data and impeller speed of the hydraulic torque converter under operating conditions; The pressure data includes at least: the lock-up clutch fluid inlet pressure, the hydraulic circulation circular fluid inlet pressure, and the hydraulic circulation circular fluid outlet pressure; the working wheel speed includes: the pump wheel speed and the turbine speed. S2: Determine the operating state of the lock-up clutch based on the pressure data and the rotational speed of the working wheel; the operating state includes at least: engaged state, slipping state, and disengaged state; S3: Based on the first pressure difference and first speed difference obtained from the operating state of the lock-up clutch, a preset algorithm is used to determine the fault level and fault type of the hydraulic torque converter; S4: Obtain the corresponding adjustment strategy based on the fault level of the hydraulic torque converter to adjust the output torque of the hydraulic torque converter.

2. The method according to claim 1, characterized in that, S2: Determine the operating status of the lock-up clutch based on the pressure data and the speed of the working wheel; The operating states include at least: a combined state, a sliding state, and a separated state, specifically including: If the first pressure difference between the lock-up clutch oil inlet pressure and the hydraulic circulation circle oil inlet pressure is greater than or equal to the lock-up clutch lock-up pressure setting value, and the pump wheel speed is equal to the turbine speed, then the lock-up clutch is determined to be engaged. If the first pressure difference between the lock-up clutch oil inlet pressure and the hydraulic circulation oil inlet pressure is less than the lock-up clutch lock-up pressure setting value and greater than zero, then the lock-up clutch is judged to be in a slip state. If the first pressure difference between the inlet pressure of the lock-up clutch oil and the inlet pressure of the hydraulic circulation cylinder oil is less than or equal to zero, and the first speed difference between the pump wheel speed and the turbine speed is greater than zero, then the lock-up clutch is determined to be in a disengaged state.

3. The method according to claim 2, characterized in that, S3: Based on the first pressure difference and first speed difference obtained from the operating state of the lock-up clutch, a preset algorithm is used to determine the fault level and fault type of the hydraulic torque converter, specifically including: When the lock-up clutch is engaged, determine whether the first speed difference is zero; If not, determine whether the hydraulic circulation oil outlet pressure P3 falls within the set pressure range; If so, the hydraulic torque converter is determined to be a level two fault, and the fault type is wear of the lock-up clutch friction plate; If the oil inlet pressure P1 of the lock-up clutch is less than the standard setting value and the first speed difference is greater than the rated threshold, the torque converter is judged to be a level two fault, and the fault type is the first solenoid valve pressure relief or the first oil circuit pressure relief.

4. The method according to claim 3, characterized in that, S3: Based on the first pressure difference and first speed difference obtained from the operating state of the lock-up clutch, a preset algorithm is used to determine the fault level and fault type of the hydraulic torque converter, specifically including: When the lock-up clutch is in a slipping state, if the first speed difference between the pump wheel and the turbine is greater than the rated threshold for a preset time, and the oil inlet pressure P1 of the lock-up clutch is less than the standard set value, then the hydraulic torque converter is judged to be a level two fault, and the fault type is the first solenoid valve pressure relief or the first oil circuit pressure relief. If the first speed difference ΔN between the pump impeller and the turbine is greater than the rated threshold, and the oil inlet pressure P1 of the lock-up clutch falls within the set pressure range, then the torque converter is judged to be a level two fault, and the fault type is damage to the pump impeller or turbine blades inside the torque converter.

5. The method according to claim 4, characterized in that, S3: Based on the first pressure difference and first speed difference obtained from the operating state of the lock-up clutch, a preset algorithm is used to determine the fault level and fault type of the hydraulic torque converter, specifically including: When the lock-up clutch is disengaged, determine whether the pump wheel speed falls within the set speed range; If so, then determine whether the turbine speed is ≤ the set lower speed threshold; If so, the hydraulic torque converter is determined to be a Level 1 fault, and the fault type is pump wheel or turbine blade breakage.

6. The method according to claim 5, characterized in that, S4: Obtain the corresponding adjustment strategy based on the fault level of the hydraulic torque converter to adjust the output torque of the hydraulic torque converter, specifically including: S401: If the fault level of the hydraulic torque converter is greater than or equal to the set level, then obtain the second adjustment strategy; S402: In response to the second adjustment strategy, generate a first constraint instruction and a first restriction instruction; S403: Based on a first constraint instruction, restrict the vehicle to operate under a first load condition; the first load condition includes at least: a rapid acceleration condition and a high load condition; S404: Based on the first limiting command, control the engine torque to be limited and output according to the first preset ratio.

7. The method according to claim 6, characterized in that, S4: Obtain the corresponding adjustment strategy based on the fault level of the hydraulic torque converter to adjust the output torque of the hydraulic torque converter, specifically including: S405: If the fault level of the hydraulic torque converter is less than the set level, then obtain the first adjustment strategy; S406: In response to the first adjustment strategy, generate a second restriction instruction and a first emergency prevention instruction; S407: Based on the second limiting command, control the engine torque to be limited and output according to a second preset ratio; wherein the second preset ratio is less than the first preset ratio; S408: Based on the first emergency prevention command, generate an advanced alarm prompt and control the vehicle to enter emergency driving mode.

8. A hydraulic torque converter fault detection system, characterized in that, include: The acquisition unit is used to acquire pressure data and impeller speed of the hydraulic torque converter under operating conditions. The pressure data includes at least: the lock-up clutch oil inlet pressure P1, the hydraulic circulation circular oil inlet pressure P2, and the hydraulic circulation circular oil outlet pressure P3; the working wheel speed includes: the pump wheel speed Np and the turbine speed Nt. The judgment unit is used to determine the operating state of the lock-up clutch based on pressure data and the rotational speed of the working wheel; the operating state includes at least: engaged state, slipping state, and disengaged state; The strategy unit is configured to determine the fault level and fault type of the hydraulic torque converter based on the first pressure difference and first speed difference obtained from the operating state of the lock-up clutch and a preset algorithm. The control unit is configured to obtain the corresponding adjustment strategy based on the fault level of the hydraulic torque converter in order to adjust the output torque of the hydraulic torque converter.

9. An electronic device, comprising: The system comprises 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; characterized in that the memory stores a computer program, which, when executed by the processor, causes the processor to perform the steps of the method described in any one of claims 1 to 7.

10. 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 the method as described in any one of claims 1 to 7.

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