A power take-off fault detection method, device and equipment of a vehicle and a storage medium

Abstract

The application discloses a kind of power take-off fault detection method, device, equipment and storage medium of vehicle.It includes: detecting the circuit connection state of power take-off electromagnetic valve;When detecting that the circuit of power take-off electromagnetic valve is on, whether the combination input parameter meets the preset combination input condition is detected;Combination input parameter includes output shaft speed information, gear information and hand brake information;When detecting that the combination input parameter meets the preset combination input condition, the pressure of gas circuit is detected;When detecting that the gas circuit pressure is greater than or equal to the preset pressure, the feedback signal of power take-off combination feedback switch is acquired;When receiving feedback signal, determine that power take-off is fault-free.The above-mentioned logic sequence is used for detection, avoids invalid operation to save detection time, more accurately locates the problem, greatly improves detection efficiency.

Description

Technical Field

[0001] The present invention relates to the field of power take-off control, and in particular to a method, device, equipment and storage medium for detecting power take-off faults of a vehicle. Background Art

[0002] Commercial dump trucks and special-purpose commercial vehicles are generally equipped with power take-offs. For example, dump trucks need power take-offs to output power to lift the dump bucket. When special-purpose vehicles are operating, power take-offs are needed to output power to make the upper body work, such as sprinkler trucks, garbage trucks, etc.

[0003] The PTO installed on an automatic transmission has complex engagement control. If a PTO engagement failure occurs, meaning it fails to engage, the vehicle's bodywork cannot be operated, impacting user experience. Therefore, rapid diagnosis, location, and troubleshooting are essential. Currently, most commercial vehicles on the market offer incomplete or even no PTO fault diagnosis. This makes it difficult for users and service personnel to quickly locate and troubleshoot the problem when a PTO fails to engage. Summary of the Invention

[0004] The present invention provides a vehicle power take-off fault detection method, device, equipment and storage medium to solve the technical problem that when the power take-off cannot be engaged, the fault cannot be quickly located and the fault cannot be quickly repaired.

[0005] According to one aspect of the present invention, a method for detecting a power take-off fault of a vehicle is provided, wherein the vehicle comprises: a control module, a power take-off, a power take-off solenoid valve, a pressure sensor, a power take-off combined feedback switch, and a transmission;

[0006] The power take-off is connected to the power take-off solenoid valve via an air circuit; the pressure sensor is provided on the air circuit; the control module is electrically connected to the power take-off solenoid valve, the pressure sensor, the power take-off combination feedback switch, the power take-off, and the transmission respectively; the power take-off combination feedback switch is used to feedback the combination information between the power take-off and the transmission;

[0007] The power take-off fault detection method comprises:

[0008] detecting a circuit connection status of the power take-off solenoid valve;

[0009] When it is detected that the circuit of the power take-off solenoid valve is in a conducting state, detecting whether the combined input parameters meet the preset combined input conditions; the combined input parameters include output shaft speed information, gear position information and parking brake information;

[0010] When it is detected that the combined input parameter meets a preset combined input condition, detecting the pressure of the gas path;

[0011] When it is detected that the gas circuit pressure is greater than or equal to a preset pressure, a feedback signal of the power take-off combined with a feedback switch is obtained;

[0012] When the feedback signal is received, it is determined that the power take-off has no fault.

[0013] Optionally, detecting the circuit connection status of the power take-off solenoid valve includes:

[0014] obtaining a current flowing through the solenoid valve of the power take-off;

[0015] A circuit connection state of the power take-off solenoid valve is determined according to the current.

[0016] Optionally, the vehicle further comprises: an instrument panel and a power take-off operation switch located on the instrument panel; the power take-off operation switch is electrically connected to the control module;

[0017] Before detecting the circuit connection state of the power take-off solenoid valve, the method further includes:

[0018] receiving an engagement instruction of the power take-off;

[0019] An opening instruction is output to the power take-off solenoid valve according to the combined instruction to control the power take-off solenoid valve to be turned on.

[0020] Optionally, the vehicle further includes an output shaft speed sensor, a gear position sensor and a handbrake switch; the control module includes a transmission control unit and a vehicle control unit;

[0021] The transmission control unit is electrically connected to the output shaft speed sensor and the gear position sensor respectively; the vehicle control unit is electrically connected to the handbrake switch;

[0022] Before detecting whether the combined input parameters meet the preset combined input conditions, the method further includes:

[0023] Obtaining the combined input parameters;

[0024] Obtaining the combined input parameters includes:

[0025] The transmission control unit obtains the output shaft speed information through the output shaft speed sensor;

[0026] The transmission control unit obtains the gear position information through the gear position sensor;

[0027] The vehicle control unit determines the handbrake information through the handbrake signal transmitted by the handbrake switch.

[0028] Optionally, when it is detected that the combined input parameter satisfies a preset combined input condition, detecting the pressure of the gas path includes:

[0029] When it is detected that the output shaft speed information reaches a preset value, the gear position information is in a neutral state, and the handbrake information is in a pulled state, the pressure of the air circuit is detected.

[0030] Optionally, after detecting the circuit connection state of the power take-off solenoid valve, the method further includes:

[0031] When it is detected that the circuit of the power take-off solenoid valve is in an open circuit or short circuit state, a prompt of a power take-off solenoid valve failure is issued;

[0032] After detecting whether the combined input parameters meet the preset combined input conditions, the method further includes:

[0033] When it is detected that the combination input parameter does not meet the preset combination input condition, a prompt of preset combination input condition failure is issued;

[0034] After detecting the pressure of the gas circuit, the method further includes:

[0035] When it is detected that the gas circuit pressure is lower than the preset pressure, a prompt of a power take-off gas circuit failure is issued;

[0036] After obtaining the feedback signal of the power take-off combined with the feedback switch, the method further includes:

[0037] When the feedback signal is not received, a prompt of a mechanical failure of the power take-off is issued.

[0038] Optionally, when it is detected that the combined input parameter does not meet the preset combined input condition, issuing a preset combined input condition failure prompt includes:

[0039] When it is detected that the value of the output shaft speed information does not reach a preset value, a prompt is issued indicating that the vehicle is in a non-parking state;

[0040] and / or,

[0041] When detecting that the gear position information is not in the neutral state, issuing a vehicle non-neutral state prompt;

[0042] and / or,

[0043] When it is detected that the handbrake is not in the pulled-up state, a prompt is issued indicating that the vehicle handbrake is in the unpulled-up state.

[0044] According to another aspect of the present invention, a vehicle power take-off fault detection device is provided, comprising:

[0045] A power take-off solenoid valve detection module, used to detect the circuit connection status of the power take-off solenoid valve;

[0046] a combined input parameter detection module, configured to detect whether the combined input parameters meet preset combined input conditions when detecting that the circuit of the power take-off solenoid valve is in an on state; the combined input parameters include output shaft speed information, gear position information, and parking brake information;

[0047] an air circuit pressure detection module, configured to detect the pressure of the air circuit when it is detected that the combined input parameter satisfies a preset combined input condition;

[0048] A feedback signal acquisition module, configured to acquire a feedback signal from the power take-off combined with a feedback switch when detecting that the gas circuit pressure is greater than or equal to a preset pressure;

[0049] The feedback signal receiving module is used to determine that the power take-off has no faults when receiving the feedback signal.

[0050] According to another aspect of the present invention, a power take-off fault detection device is provided, the power take-off fault detection device comprising:

[0051] at least one processor; and

[0052] a memory communicatively connected to the at least one processor; wherein,

[0053] 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 power take-off fault detection method according to any embodiment of the present invention.

[0054] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the power take-off fault detection method according to any embodiment of the present invention when executed.

[0055] This embodiment of the present invention first checks the circuit connection status of the power take-off solenoid valve, then checks whether the combined input parameters meet preset combined input conditions, further checks the air circuit pressure, and finally obtains the feedback signal from the power take-off feedback switch. This logical sequence of testing avoids invalid operations, saves testing time, more accurately locates the problem, and significantly improves detection efficiency.

[0056] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0058] Figure 1 1 is a schematic structural diagram of a power take-off system of a first vehicle provided in an embodiment of the present invention;

[0059] Figure 2 This is a flow chart of a first vehicle power take-off fault detection method provided by an embodiment of the present invention;

[0060] Figure 3 is a flow chart of a second vehicle power take-off fault detection method provided by an embodiment of the present invention;

[0061] Figure 4 1 is a schematic structural diagram of a power take-off system of a second vehicle provided in an embodiment of the present invention;

[0062] Figure 5 is a flow chart of a third vehicle power take-off fault detection method provided by an embodiment of the present invention;

[0063] Figure 6 2 is a schematic structural diagram of a power take-off system of a third vehicle provided in an embodiment of the present invention;

[0064] Figure 7 is a flow chart of a fourth vehicle power take-off fault detection method provided by an embodiment of the present invention;

[0065] Figure 8 is a flow chart of a fifth vehicle power take-off fault detection method provided by an embodiment of the present invention;

[0066] Figure 9 1 is a schematic structural diagram of a vehicle power take-off fault detection device provided according to an embodiment of the present invention;

[0067] Figure 10 1 is a structural diagram of a power take-off fault detection device provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0068] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0069] It should be noted that the terms "first," "second," and the like 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 precedence. It should be understood that the numbers used in this manner are interchangeable where appropriate so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, any variations of the terms "including" and "having" are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to these processes, methods, products, or apparatus.

[0070] Figure 1 This is a schematic diagram of the structure of the first vehicle power take-off system provided according to an embodiment of the present invention. Figure 2 This is a flow chart of a first vehicle power take-off fault detection method according to an embodiment of the present invention. This embodiment is applicable to performing power take-off fault detection when a power take-off fails to engage. This method can be performed by a power take-off fault detection device. Figure 1 As shown, the vehicle includes: a control module 1, a power take-off 2, a power take-off solenoid valve 3, a pressure sensor 4, a power take-off combined feedback switch 5 and a transmission 6;

[0071] The power take-off 2 is connected to the power take-off solenoid valve 3 via an air line 7; a pressure sensor 4 is provided on the air line 7; the control module 1 is electrically connected to the power take-off solenoid valve 3, the pressure sensor 4, the power take-off combination feedback switch 5, the power take-off 2, and the transmission 6; the power take-off combination feedback switch 5 is used to feedback the combination information between the power take-off 2 and the transmission 6;

[0072] like Figure 2 As shown, the power take-off fault detection method for the vehicle based on the above structure includes the following steps:

[0073] S110: Detect the circuit connection status of the power take-off solenoid valve.

[0074] Specifically, such as Figure 1As shown, the power take-off (PTO) 2 is mounted on the transmission 6. By coupling with the transmission 6, the PTO 2 outputs engine power to an external working device. The PTO 2 and transmission 6 are coupled using air pressure as a power source. Shifting the shift fork causes the PTO 2 to engage with the gears on the transmission 6, thereby achieving power transmission. The PTO solenoid valve 3 operates based on electromagnetic force, controlling the flow of air. The PTO 2 and PTO solenoid valve 3 are connected via an air circuit 7, and the control module 1 is electrically connected to the PTO solenoid valve 3. This controls the opening of the PTO solenoid valve 3, energizing the air circuit 7 and providing air pressure for coupling the PTO 2 and transmission 6. However, if the PTO solenoid valve malfunctions and fails to conduct, the coupling process between the PTO 2 and transmission 6 will fail without air pressure. Therefore, when troubleshooting a PTO, it is necessary to check the solenoid valve's circuit connection status to ensure proper operation of the PTO solenoid valve 3.

[0075] S120: When it is detected that the circuit of the power take-off solenoid valve is in the on state, detecting whether the combined input parameters meet the preset combined input conditions.

[0076] The optional preset combined input condition may be that the output shaft speed information reaches a preset value, the gear position information is in a neutral state, and the handbrake information is in a pulled state.

[0077] Specifically, the preset value can be zero. When the output shaft speed information is zero, it indicates that the vehicle is in a stopped state. That is to say, the power take-off 2 and the transmission 6 can only be combined when the vehicle is in a stopped state, the gear is in neutral, and the handbrake is in the pulled state. The purpose of detecting whether the combination input parameters meet the preset combination input conditions is to avoid damage to the driver or the vehicle caused by combining the power take-off 2 and the transmission 6 when the vehicle is not in a stopped state, thereby improving the safety of the combination process. Therefore, when it is detected that the circuit of the power take-off solenoid valve 3 is in a conducting state, it indicates that the power take-off solenoid valve 3 is not faulty. At this time, it is also necessary to detect the power take-off combination input parameters, the output shaft speed information, the gear information, and the handbrake information to see whether the preset combination input conditions are met.

[0078] S130 : When it is detected that the combined input parameter meets the preset combined input condition, the pressure of the gas path is detected.

[0079] Specifically, when it is detected that the coupling input parameters meet the preset coupling input conditions, it means that the vehicle has stopped and the coupling conditions of the power take-off 2 and the transmission 6 are met. At this time, it is also necessary to ensure that the air path is unobstructed. If there is a blockage or leakage in the air path, it will cause insufficient air pressure and the coupling of the power take-off 2 and the transmission 6 cannot be completed. Based on this, it is necessary to perform pressure testing on the air path 7 to ensure the stability of the air pressure.

[0080] S140: When it is detected that the air circuit pressure is greater than or equal to the preset pressure, a feedback signal of the power take-off combined with the feedback switch is obtained.

[0081] Specifically, when detecting that the air path pressure is greater than or equal to the preset pressure, it indicates that the air path 7 does not have a fault. After the power take-off electromagnetic valve 3 is determined to be fault-free, the input parameter meets the preset input condition, and the air path 7 is determined to be fault-free, the feedback signal of the power take-off electromagnetic valve combination switch is acquired. The power take-off combination feedback switch 5 feeds back the combination information of the power take-off 2 and the transmission 6. That is, the power take-off combination switch will send a feedback signal after detecting that the power take-off 2 and the transmission 6 are combined.

[0082] S150, when receiving the feedback signal, it is determined that the power take-off is fault-free.

[0083] Specifically, after receiving the feedback signal, it can be determined that the power take-off 2 and the transmission 6 are combined, and the power take-off 2 is fault-free.

[0084] It should be noted that the detection sequence of the present embodiment, which first detects the circuit connection state of the power take-off electromagnetic valve 3, then detects whether the input parameter meets the preset input condition, further detects the pressure of the air path 7, and finally acquires the feedback signal of the power take-off combination feedback switch 5, cannot be changed. This is because if the power take-off electromagnetic valve 3 fails, even if the input parameter meets the preset input condition, the power take-off 2 cannot be combined with the transmission 6. Detecting the power take-off electromagnetic valve 3 first can directly locate the fault cause when the power take-off electromagnetic valve 3 is detected to have a fault. If the input parameter is detected to meet the preset input condition first, if the input parameter meets the preset input condition at this time, but the power take-off 2 and the transmission 6 still cannot be combined, the fault cause cannot be located at this time. Only when the power take-off electromagnetic valve 3 is turned on, the air pipe can have air pressure. Therefore, the detection of the air pipe must be placed after the detection of the power take-off electromagnetic valve 3. In order to avoid missing simple faults caused by improper gear position, after detecting that the input parameter meets the preset input condition, the detection of the air path pressure can more directly point to the fault problem of the air path 7. In the case that the power take-off electromagnetic valve 3 is determined to be fault-free, the input parameter meets the preset input condition, and the air path pressure is sufficient, the feedback signal of the power take-off combination feedback switch 5 is acquired. If the feedback signal is received at this time, it indicates that the power take-off 2 and the transmission 6 are combined and there is no power take-off fault. If the feedback signal is not received, the mechanical structure of the power take-off can be determined to have a fault according to the elimination method.

[0085] The present embodiment first detects the circuit connection state of the power take-off electromagnetic valve, then detects whether the input parameter meets the preset input condition, further detects the pressure of the air path 7, and finally acquires the feedback signal of the power take-off combination feedback switch. The above logical sequence is adopted for detection, which avoids invalid operation, saves detection time, more accurately locates the problem, and greatly improves the detection efficiency.

[0086] Figure 3 This is a flow chart of a second method for detecting a fault of a power take-off of a vehicle according to an embodiment of the present invention. The embodiment of the present invention is a further refinement of the circuit connection status of the solenoid valve of the power take-off. Figure 1 and Figure 3 As shown, the power take-off fault detection method includes the following steps:

[0087] S210: Obtain the current flowing through the power take-off solenoid valve.

[0088] Specifically, when the power take-off solenoid valve 3 is turned on, current will flow through it. The current flowing through the power take-off solenoid valve 3 is collected by the current sensor, and the current is converted into a current signal and transmitted to the control module 1 for processing and analysis.

[0089] S220: Determine the circuit connection state of the power take-off solenoid valve according to the current.

[0090] Specifically, the control module 1 receives, processes, and analyzes the current signal to determine whether there is a fault in the circuit connection of the power take-off solenoid valve 3. If the current signal is normal, the power take-off solenoid valve 3 is not faulty. Conversely, if the current signal is abnormal, it may be due to a short circuit or open circuit in the solenoid valve's internal coil.

[0091] S230: When it is detected that the circuit of the power take-off solenoid valve is in the on state, detecting whether the combined input parameters meet the preset combined input conditions.

[0092] The combined input parameters include output shaft speed information, gear position information and handbrake information.

[0093] S240: When it is detected that the combined input parameter meets the preset combined input condition, the pressure of the gas path is detected.

[0094] S250: When it is detected that the air circuit pressure is greater than or equal to the preset pressure, a feedback signal of the power take-off combined with the feedback switch is obtained.

[0095] S260: When the feedback signal is received, determine that the power take-off has no faults.

[0096] The embodiment of the present invention obtains the current flowing through the power take-off solenoid valve and determines the circuit connection status of the power take-off solenoid valve based on the current. The method is simple and efficient and can quickly detect whether the power take-off solenoid valve is faulty.

[0097] Figure 4 1 is a schematic structural diagram of a power take-off system of a second vehicle provided in an embodiment of the present invention; Figure 5This is a flow chart of a third method for detecting a fault of a power take-off of a vehicle according to an embodiment of the present invention. This embodiment of the present invention adds a step before detecting the circuit connection status of the power take-off solenoid valve. Figure 4 As shown, the vehicle further includes: a power take-off operating switch 8; the power take-off operating switch 8 is electrically connected to the control module 1;

[0098] like Figure 5 As shown, the power take-off fault detection method for the vehicle based on the above structure includes the following steps:

[0099] S310: Receive a power take-off engagement instruction.

[0100] Specifically, before testing the circuit connection status of the power take-off solenoid valve 3, it is necessary to ensure that the power take-off solenoid valve 3 is powered on and activated. If the power take-off solenoid valve 3 is not activated, no current flows in the circuit of the power take-off solenoid valve 3, making the circuit connection status of the power take-off solenoid valve 3 impossible to test. The power take-off operating switch 8 is located on the instrument panel, and the driver can use this switch to issue an engagement command. The control module 1 is electrically connected to the power take-off operating switch 8 and receives the engagement command from the power take-off operating switch 8.

[0101] S320: Output an opening instruction to the power take-off solenoid valve according to the combined instruction to control the power take-off solenoid valve to be turned on.

[0102] Specifically, the control module 1 outputs an opening instruction to the power take-off solenoid valve 3 according to the combined instruction. The power take-off solenoid valve 3 is turned on when receiving the opening instruction from the control module 1. At this time, the power take-off solenoid valve 3 is powered on and activated to generate current. Therefore, in order to subsequently detect the circuit of the power take-off solenoid valve 3, it is necessary to first control the power take-off solenoid valve 3 to be turned on.

[0103] S330: Detect the circuit connection status of the power take-off solenoid valve.

[0104] S340: When it is detected that the circuit of the power take-off solenoid valve is in the on state, detecting whether the combined input parameters meet the preset combined input conditions.

[0105] The combined input parameters include output shaft speed information, gear position information and handbrake information.

[0106] S350: When it is detected that the combined input parameter meets the preset combined input condition, the pressure of the gas path is detected.

[0107] S360: When it is detected that the air circuit pressure is greater than or equal to the preset pressure, a feedback signal of the power take-off combined with the feedback switch is obtained.

[0108] S370: When the feedback signal is received, determine that the power take-off has no faults.

[0109] The embodiment of the present application adds a step before detecting the circuit connection state of the power take-off electromagnetic valve, accepts the combination instruction of the power take-off, and outputs an opening instruction to the power take-off electromagnetic valve according to the combination instruction to control the power take-off electromagnetic valve to be turned on. The electromagnetic valve is ensured to be in the power-on activation state, so that the subsequent detection of the circuit of the power take-off electromagnetic valve is ensured, and the fault misjudgment caused by the fact that the power take-off electromagnetic valve is not powered on and there is no current in the internal part is avoided, thereby increasing the accuracy of the power take-off fault detection.

[0110] Figure 6 is a third vehicle power take-off system structure schematic diagram provided according to the embodiment of the present application; Figure 7 is a fourth vehicle power take-off fault detection method flow chart provided according to the embodiment of the present application. The embodiment of the present application adds a step before detecting whether the combination input parameter meets the preset combination input condition, and further describes how to obtain the combination input parameter. As shown in Figure 6 The vehicle further includes an output shaft speed sensor 9, a gear position sensor 10 and a hand brake switch 11; the control module 1 includes a transmission control unit 12 and a vehicle control unit 13; the transmission control unit 12 is electrically connected with the output shaft speed sensor 9 and the gear position sensor 10 respectively; and the vehicle control unit 13 is electrically connected with the hand brake switch 11.

[0111] It should be noted that the control module 1 in the embodiment of the present application includes the transmission control unit 12 and the vehicle control unit 13, the power take-off electromagnetic valve 3, the pressure sensor 4, the power take-off combination feedback switch 5, the power take-off 2, the transmission 6 and the power take-off operation switch 8 are electrically connected with the transmission control unit 12 in the control module 1, so as to complete the combination of the power take-off 2 and the transmission 6 according to the control instruction of the transmission control unit.

[0112] As shown in Figure 7 The vehicle power take-off fault detection method based on the above structure includes the following steps:

[0113] S410, detecting the circuit connection state of the power take-off electromagnetic valve.

[0114] S420, obtaining a combination input parameter.

[0115] The optional combination input parameter includes:

[0116] The transmission control unit obtains the output shaft speed information through the output shaft speed sensor; the transmission control unit obtains the gear position information through the gear position sensor; and the vehicle control unit determines the hand brake information through the hand brake signal transmitted by the hand brake switch.

[0117] Specifically, as Figure 6As shown, the output shaft speed sensor 9 and the gear position sensor 10 are located on the transmission 6. The output shaft speed sensor 9 is used to detect the output shaft speed of the transmission 6 to determine the parking state of the vehicle. For example, when the output shaft speed is zero, the vehicle is in a stopped state. The gear position sensor is used to detect the gear position information of the transmission 6, for example, to detect whether the vehicle is in a neutral state. The transmission control unit 12 is electrically connected to the output shaft speed sensor 9 and the gear position sensor 10, respectively, to obtain the output shaft speed information through the output shaft speed sensor 9 and the gear position information through the gear position sensor. The vehicle control unit 13 is electrically connected to the handbrake switch 11 to obtain the handbrake information through the handbrake signal transmitted by the handbrake switch. Among them, the handbrake information includes handbrake pulled up state information and handbrake lowered state information.

[0118] S430: When it is detected that the circuit of the power take-off solenoid valve is in the on state, detecting whether the combined input parameters meet the preset combined input conditions.

[0119] The combined input parameters include output shaft speed information, gear position information and handbrake information.

[0120] S440: When it is detected that the combined input parameter meets the preset combined input condition, the pressure of the gas path is detected.

[0121] S450: When it is detected that the air circuit pressure is greater than or equal to the preset pressure, a feedback signal of the power take-off combined with the feedback switch is obtained.

[0122] S460: When the feedback signal is received, determine that the power take-off has no faults.

[0123] In an embodiment of the present invention, a step of obtaining combined input parameters is added and it is described that the output shaft speed information and gear information are obtained through the transmission control unit, and the handbrake information is obtained through the vehicle control unit, so as to provide detection information for subsequent detection of whether the combined input parameters meet the preset combined input conditions, thereby further increasing the accuracy of power take-off fault detection.

[0124] Figure 8 This is a flowchart of a fifth vehicle power take-off fault detection method according to an embodiment of the present invention. This embodiment of the present invention adds a step of issuing an alarm if a fault is detected after each step. The power take-off fault detection method includes the following steps:

[0125] S510: Detect the circuit connection status of the power take-off solenoid valve.

[0126] S520: Determine whether it is in the on state.

[0127] S531: When it is detected that the circuit of the power take-off solenoid valve is in the on state, detecting whether the combined input parameters meet the preset combined input conditions.

[0128] The combined input parameters include output shaft speed information, gear position information and handbrake information.

[0129] S532: When it is detected that the circuit of the power take-off solenoid valve is in an open circuit or short circuit state, a prompt of a power take-off solenoid valve failure is issued.

[0130] S540: Determine whether the conditions are met.

[0131] S551 : When it is detected that the combined input parameters meet the preset combined input conditions, the pressure of the gas path is detected.

[0132] S552: When it is detected that the combination input parameters do not meet the preset combination input conditions, a prompt indicating a preset combination input condition failure is issued.

[0133] Optionally, when it is detected that the combined input parameter does not meet the preset combined input condition, issuing a preset combined input condition failure prompt includes:

[0134] When it is detected that the value of the output shaft speed information does not reach a preset value, a prompt is issued indicating that the vehicle is in a non-parking state;

[0135] and / or,

[0136] When detecting that the gear position information is not in the neutral state, issuing a vehicle non-neutral state prompt;

[0137] and / or,

[0138] When it is detected that the handbrake is not in the pulled-up state, a prompt is issued indicating that the vehicle handbrake is in the unpulled-up state.

[0139] Specifically, the preset combined input conditions include the output shaft speed reaching a preset value, the gear position being in neutral, and the parking brake being engaged. If any one of these conditions is not met, a corresponding fault prompt will be issued. If two conditions are not met, two fault prompts will be issued. If none of the three conditions are met, three fault prompts will be issued.

[0140] For example, when only the output shaft speed information value does not meet the preset conditions, only the vehicle is not parked prompt is issued; when only the gear information is not in the neutral state, only the vehicle is not in the neutral state prompt is issued; and when only the parking brake information is not in the engaged state, only the vehicle parking brake is not engaged prompt is issued. When the output shaft speed information value does not meet the preset conditions and the gear information is not in the neutral state, both the vehicle is not parked prompt and the vehicle is not neutral state prompt are issued; when the output shaft speed information value does not meet the preset conditions and the parking brake information is not engaged, both the vehicle is not parked prompt and the vehicle parking brake is not engaged prompt are issued; when the gear information is not in the neutral state and the parking brake information is not engaged, both the vehicle is not neutral state prompt and the vehicle parking brake is not engaged prompt are issued. When the output shaft speed information value does not meet the preset conditions, the gear information is not in the neutral state, and the parking brake information is not engaged, both the vehicle is not parked prompt, the vehicle is not neutral state prompt, and the vehicle parking brake is not engaged prompt are issued.

[0141] S560: Determine whether the pressure is greater than or equal to the preset pressure.

[0142] S571. When it is detected that the air circuit pressure is greater than or equal to the preset pressure, a feedback signal of the power take-off combined with the feedback switch is obtained.

[0143] S572: When it is detected that the air circuit pressure is lower than the preset pressure, a prompt indicating a power take-off air circuit failure is issued.

[0144] S580: Determine whether a combined feedback signal is received.

[0145] S591: When a feedback signal is received, determine that the power take-off has no faults.

[0146] S592: When no feedback signal is received, a prompt indicating a mechanical failure of the power take-off is issued.

[0147] It is understood that the vehicle also includes an instrument panel, which is connected to the control module 1 via the SAE J1939 bus. SAE J1939 is a CAN bus-based protocol designed for network system control and communication in heavy-duty vehicles such as trucks and buses. The instrument panel is used to display detected fault information to the driver in text form.

[0148] The embodiment of the present invention provides a text prompt when a fault occurs during the detection of the power take-off and transmission connection process, so that the driver can quickly understand the problem and take corresponding measures to ensure the stability and safety of the vehicle power take-off system.

[0149] Figure 9 FIG. 1 is a schematic structural diagram of a vehicle power take-off fault detection device according to an embodiment of the present invention. Figure 9As shown, the device includes:

[0150] A power take-off solenoid valve detection module 610 is used to detect the circuit connection status of the power take-off solenoid valve;

[0151] The combined input parameter detection module 620 is used to detect whether the combined input parameters meet the preset combined input conditions when it is detected that the circuit of the power take-off solenoid valve is in the on state; the combined input parameters include output shaft speed information, gear position information, and parking brake information;

[0152] The gas circuit pressure detection module 630 is used to detect the pressure of the gas circuit when it is detected that the combined input parameters meet the preset combined input conditions;

[0153] A feedback signal acquisition module 640 is configured to acquire a feedback signal from a power take-off combined with a feedback switch when it is detected that the air circuit pressure is greater than or equal to a preset pressure;

[0154] The feedback signal receiving module 650 is configured to determine that the power take-off has no faults when receiving the feedback signal.

[0155] The vehicle power take-off fault detection device provided in the embodiment of the present invention can execute the vehicle power take-off fault detection method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0156] Figure 10 The figure is a schematic diagram of a power take-off (PTO) fault detection device according to an embodiment of the present invention. The PTO fault detection device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants (PDAs), servers, blade servers, mainframe computers, and other suitable computers. The PTO fault detection device may also represent various forms of mobile devices, such as personal digital assistants (PDAs), cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are provided for illustrative purposes only and are not intended to limit the implementation of the inventions described and / or claimed herein.

[0157] like Figure 10As shown, the power take-off fault detection device 70 includes at least one processor 71 and memory, such as a read-only memory (ROM) 72 or a random access memory (RAM) 13, communicatively connected to the at least one processor 71. The memory stores computer programs executable by the at least one processor. The processor 71 can perform various appropriate actions and processes based on the computer programs stored in the ROM 72 or loaded from the storage unit 78 into the RAM 73. The RAM 73 can also store various programs and data required for the operation of the power take-off fault detection device 70. The processor 71, ROM 72, and RAM 73 are interconnected via a bus 74. An input / output (I / O) interface 75 is also connected to the bus 74.

[0158] Multiple components in the power take-off fault detection device 70 are connected to an I / O interface 75, including an input unit 76, such as a keyboard, a mouse, etc.; an output unit 77, such as various types of displays, speakers, etc.; a storage unit 78, such as a magnetic disk, an optical disk, etc.; and a communication unit 79, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 79 allows the power take-off fault detection device 70 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0159] Processor 71 can be any general-purpose and / or specialized processing component with processing and computing capabilities. Some examples of processor 71 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processors (DSPs), and any other suitable processor, controller, microcontroller, etc. Processor 71 executes the various methods and processes described above, such as the power take-off fault detection method.

[0160] In some embodiments, the power take-off (PTO) fault detection method may be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as storage unit 78. In some embodiments, part or all of the computer program may be loaded and / or installed into the PTO fault detection device 70 via ROM 72 and / or communication unit 79. When the computer program is loaded into RAM 73 and executed by processor 71, one or more steps of the PTO fault detection method described above may be performed. Alternatively, in other embodiments, processor 71 may be configured to execute the PTO fault detection method via any other suitable means (e.g., via firmware).

[0161] Various embodiments of the systems and techniques described above can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), system-on-chip systems (SOCs), programmable logic devices (CPLDs), 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 interpreted on a programmable system that includes at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0162] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when the computer program is executed by the processor, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The computer program may 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 a remote machine or server.

[0163] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, device, or apparatus. A computer-readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or apparatus, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media may include an electrical connection based on one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0164] To provide user interaction, the systems and techniques described herein can be implemented on a PTO fault detection device that includes: 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 pointing device (e.g., a mouse or trackball) through which the user can provide input to the PTO fault detection device. Other types of devices can also be used to provide user interaction; 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).

[0165] The systems and techniques described herein can be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0166] A computing system may include clients and servers. The clients and servers are typically remote from each other and typically interact via a communication network. This client-server relationship arises through computer programs running on the respective computers, creating a client-server relationship. The server may be a cloud server, also known as a cloud computing server or cloud host. This server is a hosting product within the cloud computing service ecosystem that addresses the management difficulties and limited scalability of traditional physical hosting and VPS services.

[0167] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed 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. This is not limited herein.

[0168] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A method for detecting a power take-off failure of a vehicle, characterized in that: The vehicle includes: a control module, a power take-off, a power take-off solenoid valve, a pressure sensor, a power take-off combined feedback switch, and a transmission; The power take-off is connected to the power take-off solenoid valve via an air circuit; the pressure sensor is provided on the air circuit; the control module is electrically connected to the power take-off solenoid valve, the pressure sensor, the power take-off combination feedback switch, the power take-off, and the transmission respectively; the power take-off combination feedback switch is used to feedback the combination information between the power take-off and the transmission; The power take-off fault detection method comprises: detecting a circuit connection state of the power take-off solenoid valve; When it is detected that the circuit of the power take-off solenoid valve is in a conducting state, detecting whether the combined input parameters meet the preset combined input conditions; the combined input parameters include output shaft speed information, gear position information, and parking brake information; the output shaft speed information is the output shaft speed information of the gearbox; When it is detected that the combined input parameter meets a preset combined input condition, detecting the pressure of the gas path; When it is detected that the gas circuit pressure is greater than or equal to a preset pressure, a feedback signal of the power take-off combined with a feedback switch is obtained; When the feedback signal is received, it is determined that the power take-off has no fault.

2. The method for detecting a power take-off failure according to claim 1, wherein: Detecting the circuit connection status of the power take-off solenoid valve includes: obtaining a current flowing through the solenoid valve of the power take-off; A circuit connection state of the power take-off solenoid valve is determined according to the current.

3. The method for detecting a power take-off failure according to claim 1, wherein: The vehicle further comprises: an instrument panel and a power take-off operation switch located on the instrument panel; the power take-off operation switch is electrically connected to the control module; Before detecting the circuit connection state of the power take-off solenoid valve, the method further includes: receiving an engagement instruction of the power take-off; An opening instruction is output to the power take-off solenoid valve according to the combined instruction to control the power take-off solenoid valve to be turned on.

4. The method for detecting a power take-off failure according to claim 1, wherein: The vehicle also includes an output shaft speed sensor, a gear position sensor and a handbrake switch; the control module includes a transmission control unit and a vehicle control unit; The transmission control unit is electrically connected to the output shaft speed sensor and the gear position sensor respectively; The vehicle control unit is electrically connected to the handbrake switch; Before detecting whether the combined input parameters meet the preset combined input conditions, the method further includes: Obtaining the combined input parameters; Obtaining the combined input parameters includes: The transmission control unit obtains the output shaft speed information through the output shaft speed sensor; The transmission control unit obtains the gear position information through the gear position sensor; The vehicle control unit determines the handbrake information through the handbrake signal transmitted by the handbrake switch.

5. The method for detecting a power take-off failure according to claim 1, wherein: When it is detected that the combined input parameter satisfies a preset combined input condition, detecting the pressure of the gas path includes: When it is detected that the output shaft speed information reaches a preset value, the gear position information is in a neutral state, and the handbrake information is in a pulled state, the pressure of the air circuit is detected.

6. The method for detecting a power take-off failure according to claim 1, wherein: After detecting the circuit connection state of the power take-off solenoid valve, the method further includes: When it is detected that the circuit of the power take-off solenoid valve is in an open circuit or short circuit state, a prompt of a power take-off solenoid valve failure is issued; After detecting whether the combined input parameters meet the preset combined input conditions, the method further includes: When it is detected that the combination input parameter does not meet the preset combination input condition, a prompt of preset combination input condition failure is issued; After detecting the pressure of the gas circuit, the method further includes: When it is detected that the gas circuit pressure is lower than the preset pressure, a prompt of a power take-off gas circuit failure is issued; After obtaining the feedback signal of the power take-off combined with the feedback switch, the method further includes: When the feedback signal is not received, a prompt of a mechanical failure of the power take-off is issued.

7. The method for detecting a power take-off failure according to claim 6, wherein: When it is detected that the combination input parameter does not meet the preset combination input condition, a prompt of preset combination input condition failure is issued, including: When it is detected that the value of the output shaft speed information does not reach a preset value, a prompt is issued indicating that the vehicle is in a non-parking state; and / or, When detecting that the gear position information is in a non-neutral state, issuing a vehicle non-neutral state prompt; and / or, When it is detected that the handbrake is not in the pulled-up state, a prompt is issued indicating that the vehicle handbrake is in the unpulled-up state.

8. A vehicle power take-off fault detection device, used to execute the power take-off fault detection method according to any one of claims 1 to 7, characterized in that: include: A power take-off solenoid valve detection module, used to detect the circuit connection status of the power take-off solenoid valve; a combined input parameter detection module, configured to detect whether the combined input parameters meet preset combined input conditions when detecting that the circuit of the power take-off solenoid valve is in a conducting state; the combined input parameters include output shaft speed information, gear position information, and parking brake information; the output shaft speed information is output shaft speed information of the gearbox; an air circuit pressure detection module, configured to detect the pressure of the air circuit when it is detected that the combined input parameter satisfies a preset combined input condition; A feedback signal acquisition module, configured to acquire a feedback signal from the power take-off combined with a feedback switch when detecting that the gas circuit pressure is greater than or equal to a preset pressure; The feedback signal receiving module is used to determine that the power take-off has no faults when receiving the feedback signal.

9. A power take-off fault detection device, characterized in that: The power take-off fault detection device comprises: one or more processors; a storage device for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement the power take-off fault detection method according to any one of claims 1 to 7.

10. A storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the power take-off fault detection method as described in any one of claims 1 to 7 is implemented.

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