Fault detection method, device and equipment for power takeoff of vehicle and storage medium

Abstract

The invention discloses a power takeoff fault detection method, device and equipment of a vehicle and a storage medium. The fault detection method comprises the steps that the circuit connection state of the power takeoff electromagnetic valve is detected; when it is detected that the circuit of the power takeoff electromagnetic valve is in the on state, whether the combination input parameters meet preset combination input conditions or not is detected; the combined input parameters comprise output shaft rotating speed information, gear information and hand brake information; when it is detected that the combination input parameter meets the preset combination input condition, the pressure of the gas path is detected; when it is detected that the gas path pressure is larger than or equal to the preset pressure, a feedback signal of the power takeoff combined with a feedback switch is obtained; and when the feedback signal is received, determining that the power takeoff has no fault. By adopting the logic sequence for detection, invalid operation is avoided, the detection time is saved, the problem is more accurately positioned, and the detection efficiency is greatly improved.

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 power take-off installed on the automatic transmission has a complex control system. When a power take-off fails, that is, the power take-off cannot be engaged, the vehicle will not be able to operate, affecting the user's use. Therefore, when a power take-off fails, it is necessary to quickly diagnose, locate and troubleshoot the fault. At present, most commercial vehicles on the market do not have comprehensive or even missing fault diagnosis for power take-offs, which results in users and service personnel being unable to quickly locate and troubleshoot the fault when the vehicle fails to engage the power take-off. 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, the vehicle comprising: 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 through an air circuit; the pressure sensor is arranged 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 of the power take-off and the transmission;

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

[0008] Detecting the 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 the on 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 hand brake information;

[0010] When it is detected that the combined input parameter satisfies 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 state 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-up 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 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 comprises:

[0035] When it is detected that the gas circuit pressure is lower than a preset pressure, a prompt of a gas circuit failure of the power take-off 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 combination parameter does not meet the preset combination input condition, issuing a prompt of preset combination input condition failure 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 that the vehicle is in a non-parking state;

[0040] and / or,

[0041] When the gear information is detected to be in a non-neutral state, a prompt is issued that the vehicle is in a non-neutral state;

[0042] and / or,

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

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

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

[0046] A combined input parameter detection module is used to detect whether the combined input parameter meets a preset combined input condition when it is detected that the circuit of the power take-off solenoid valve is in a conducting state; the combined input parameter includes output shaft speed information, gear position information and hand brake information;

[0047] A gas circuit pressure detection module, used to detect the pressure of the gas circuit when it is detected that the combined input parameter meets the preset combined input condition;

[0048] A feedback signal acquisition module, used for acquiring a feedback signal of the power take-off combined with a feedback switch when it is detected 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 fault 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 described in 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 described in any embodiment of the present invention when executed.

[0055] The embodiment of the present invention first detects the circuit connection state of the power take-off solenoid valve, then detects whether the combined input parameters meet the preset combined input conditions, further detects the pressure of the gas circuit, and finally obtains the feedback signal of the power take-off combined feedback switch. The above-mentioned logical sequence is used for detection to avoid invalid operations, save detection time, locate the problem more accurately, and greatly improve detection efficiency.

[0056] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily 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 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 is a flow chart of a first vehicle power take-off fault detection method provided in an embodiment of the present invention;

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

[0061] Figure 4 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 in an embodiment of the present invention;

[0063] Figure 6 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 method for detecting a power take-off failure of a vehicle provided in an embodiment of the present invention;

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

[0066] Fig. 9 is a structural schematic diagram of a vehicle power take-off fault detection device provided in an embodiment of the present invention;

[0067] Fig.10 It is a structural schematic 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 scheme of the present invention, the technical scheme 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 described embodiments 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 creative work should fall within the scope of protection of the present invention.

[0069] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged 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 variation of the terms "including" and "having" is intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0070] Figure 1 Schematic diagram of the structure of a power take-off system of a first vehicle provided according to an embodiment of the present invention Figure 2 1 is a flow chart of a first vehicle power take-off fault detection method according to an embodiment of the present invention. This embodiment can be applied to perform fault detection on a power take-off when a power take-off fails to engage. The 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 through an air circuit 7; the pressure sensor 4 is arranged on the air circuit 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 respectively; the power take-off combination feedback switch 5 is used to feedback the combination information of the power take-off 2 and the transmission 6;

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

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

[0074] Specifically, Figure 1As shown, the power take-off 2 is a device installed on the transmission 6. The power take-off 2 outputs the power of the engine to the external working device by combining with the transmission 6. The power take-off 2 is combined with the transmission 6 by using air pressure as the power source. The fork is moved to make the power take-off 2 mesh with the gears on the transmission 6 to achieve power transmission. The working principle of the power take-off solenoid valve 3 is based on the action of electromagnetic force to control the on and off of the gas. The power take-off 2 is connected to the power take-off solenoid valve 3 through the air circuit 7, and the control module 1 is electrically connected to the power take-off solenoid valve 3, which is used to control the opening of the power take-off solenoid valve 3 to make the air circuit 7 conductive to provide air pressure for the combination of the power take-off 3 and the transmission 6. Of course, if the power take-off solenoid valve fails to conduct, the combination process of the power take-off 2 and the transmission 6 cannot be completed without air pressure drive. Based on this, when performing fault detection on the power take-off, it is necessary to detect the circuit connection state of the solenoid valve to ensure that the power take-off solenoid valve 3 can work normally.

[0075] S120: When it is detected that the circuit of the power take-off solenoid valve is in the on state, detect 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-up state.

[0077] Specifically, the preset value may 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 not pulled up. 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 the combination of the power take-off 2 and the transmission 6 when the vehicle is not stopped, and to improve 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 fault-free. 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 combination input parameter meets the preset combination input condition, it means that the vehicle has stopped and the combination condition of the power take-off 2 and the transmission 6 is 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 combination of the power take-off 2 and the transmission 6 cannot be completed. Based on this, it is necessary to perform pressure detection 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 it is detected that the air circuit pressure is greater than or equal to the preset pressure, it indicates that there is no fault in the air circuit 7. After the power take-off solenoid valve 3 is fault-free, the combination input parameter meets the preset combination input condition and the air circuit 7 is fault-free, the feedback signal of the power take-off solenoid valve combination switch is obtained. Among them, 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 to say, after detecting that the power take-off 2 and the transmission 6 are combined, the power take-off combination switch will send a feedback signal.

[0082] S150: When the feedback signal is received, it is determined that the power take-off has no fault.

[0083] Specifically, after receiving the feedback signal, it can be determined that the power take-off 2 is fully coupled with the transmission 6 and that the power take-off 2 has no faults.

[0084] It should be noted that the embodiment of the present invention first detects the circuit connection state of the power take-off solenoid valve 3, then detects whether the combined input parameters meet the preset combined input conditions, further detects the pressure of the air circuit 7, and finally obtains the feedback signal of the power take-off combined feedback switch 5. The detection order cannot be changed. This is because if the power take-off solenoid valve 3 fails, even if the combined input parameters meet the preset combined input conditions, the power take-off 2 cannot be combined with the transmission 6. When the power take-off solenoid valve 3 is detected first, the cause of the fault can be directly located when the power take-off solenoid valve 3 is detected to be faulty. If the combined input parameters are detected first to see whether the preset combined input conditions are met, at this time, if the combined input parameters meet the preset combined input conditions, but the power take-off 2 and the transmission 6 still cannot be combined, the cause of the fault cannot be located at this time. Only when the power take-off solenoid valve 3 is turned on, can the air pipe have air pressure. Therefore, the detection of the air pipe must be placed after the detection of the power take-off solenoid valve 3. In order to avoid missing simple faults caused by improper gear positions, after detecting that the combined input parameters meet the preset combined input conditions, the detection of the air circuit pressure can more directly point to the fault problem of the air circuit 7. When it is determined that the power take-off solenoid valve 3 has no fault, the combination input parameters meet the preset combination input conditions, and the air circuit pressure is sufficient, the feedback signal of the power take-off combination feedback switch 5 is obtained. If the feedback signal is received at this time, it means that the power take-off 2 and the transmission 6 are combined and there is no power take-off fault. If no feedback signal is received, it can be determined according to the method of elimination that the mechanical structure of the power take-off has a fault.

[0085] In the embodiment of the present invention, the circuit connection state of the power take-off solenoid valve is first detected, then the combined input parameter is detected to see whether it meets the preset combined input condition, the pressure of the gas circuit 7 is further detected, and finally the feedback signal of the power take-off combined feedback switch is obtained. The above-mentioned logical sequence is used for detection, invalid operations are avoided, detection time is saved, the problem is located more accurately, and the detection efficiency is greatly improved.

[0086] Figure 3 1 is a flow chart of a second method for detecting a fault of a power take-off of a vehicle provided in accordance with an embodiment of the present invention. The embodiment of the present invention is a further refinement of the circuit connection state 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 solenoid valve of the power take-off.

[0088] Specifically, when the power take-off solenoid valve 3 is turned on, current will flow through it. The current sensor collects the current flowing through the power take-off solenoid valve 3 and converts the current into a current signal which is 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 the current signal and processes and analyzes it to determine whether there is a fault in the circuit connection state of the power take-off solenoid valve 3. If the current signal is normal, it means that the power take-off solenoid valve 3 is not faulty. On the contrary, if the current signal is abnormal, it may be caused by a short circuit or open circuit in the internal coil of the solenoid valve.

[0091] S230: When it is detected that the circuit of the power take-off solenoid valve is in the on state, detect 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, it is determined that the power take-off has no fault.

[0096] The embodiment of the present invention obtains the current flowing through the power take-off solenoid valve and determines the circuit connection state of the power take-off solenoid valve according to the current. The method is simple and efficient and can quickly detect whether the power take-off solenoid valve has a fault.

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

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

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

[0100] Specifically, before detecting the circuit connection state of the power take-off solenoid valve 3, it is necessary to ensure that the power take-off solenoid valve 3 is in a powered-on activation state. If the power take-off solenoid valve 3 is not activated, there is no current in the circuit of the power take-off solenoid valve 3, and the circuit connection state of the power take-off solenoid valve 3 cannot be detected. The power take-off operation switch 8 is located on the instrument panel, and the driver can issue a connection instruction through the power take-off operation switch 8. The control module 1 is electrically connected to the power take-off operation switch 8 and receives the connection instruction issued by the power take-off operation switch 8.

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

[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, detecting 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, detect 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 a feedback signal is received, it is determined that the power take-off has no faults.

[0109] The embodiment of the present invention adds a step before detecting the circuit connection state of the power take-off solenoid valve, receives the power take-off connection instruction, and outputs an opening instruction to the power take-off solenoid valve according to the connection instruction to control the power take-off solenoid valve to be turned on. Ensure that the solenoid valve is in a power-on activation state, so as to detect the circuit of the power take-off solenoid valve later, avoid misjudgment of faults caused by the power take-off solenoid valve not being powered on and activated and no current inside, and increase the accuracy of power take-off fault detection.

[0110] Figure 6 is a schematic structural diagram of a power take-off system of a third vehicle provided in an embodiment of the present invention; Figure 7 4 is a flow chart of a method for detecting a power take-off failure of a vehicle according to an embodiment of the present invention. The embodiment of the present invention adds a step before detecting whether the combined input parameter satisfies the preset combined input condition, and further explains how to obtain the combined input parameter. Figure 6 As shown, the vehicle also includes an output shaft speed sensor 9, a gear position sensor 10 and a handbrake 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 to the output shaft speed sensor 9 and the gear position sensor 10 respectively; the vehicle control unit 13 is electrically connected to the handbrake switch 11.

[0111] It should be noted that the control module 1 in the embodiment of the present invention includes a transmission control unit 12 and a vehicle control unit 13, and the power take-off solenoid 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 to 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 instructions of the transmission control unit.

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

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

[0114] S420: Obtain combined input parameters.

[0115] Optionally obtaining the combined input parameters 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 information through the gear sensor; the vehicle control unit determines the handbrake information through the handbrake signal transmitted by the handbrake switch.

[0117] Specifically, Figure 6As shown, the output shaft speed sensor 9 and the gear position sensor 10 are located on the transmission 9, and 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 to obtain 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 the handbrake pulled up state information and the 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, detect 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, it is determined that the power take-off has no fault.

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

[0124] Figure 8 This is a flow chart of a fifth vehicle power take-off fault detection method provided according to an embodiment of the present invention; the embodiment of the present invention adds a step of issuing an alarm prompt if a fault exists after each step of detection. 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, detect 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 parameter does not meet the preset combination input condition, a prompt of preset combination input condition failure is issued.

[0133] Optionally, when it is detected that the combination parameter does not meet the preset combination input condition, issuing a prompt of preset combination input condition failure 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 that the vehicle is in a non-parking state;

[0135] and / or,

[0136] When the gear information is detected to be in a non-neutral state, a prompt is issued that the vehicle is in a non-neutral state;

[0137] and / or,

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

[0139] Specifically, the preset combined input conditions include the output shaft speed information reaching the preset value, the gear position information being in the neutral state, and the handbrake information being in the pulled state. As long as one of them is not satisfied, a corresponding fault prompt will be issued, if two are not satisfied, two fault prompts will be issued, and if all three are not satisfied, three fault prompts will be issued.

[0140] Exemplarily, when only the value of the output shaft speed information does not meet the preset conditions, only the vehicle is in a non-parking state prompt is issued; when only the gear information is not in a neutral state, only the vehicle is in a non-neutral state prompt is issued; when only the handbrake information is not in a pulled-up state, only the vehicle handbrake is not pulled-up state prompt is issued. When the value of the output shaft speed information does not meet the preset conditions and the gear information is not in a neutral state, the vehicle is in a non-parking state prompt and the vehicle is in a non-neutral state prompt are issued; when the value of the output shaft speed information does not meet the preset conditions and the handbrake information is not in a pulled-up state, the vehicle is in a non-parking state prompt and the vehicle handbrake is not pulled-up state prompt are issued; when the gear information is not in a neutral state and the handbrake information is not in a pulled-up state, the vehicle is in a non-neutral state prompt and the vehicle handbrake is not pulled-up state prompt are issued. When the value of the output shaft speed information does not meet the preset conditions, the gear information is not in a neutral state and the handbrake information is not in a pulled-up state, the vehicle is in a non-parking state prompt, the vehicle is in a non-neutral state prompt and the vehicle is in a non-neutral state prompt are issued.

[0141] S560: Determine whether the pressure is greater than or equal to a 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 of 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, it is determined that the power take-off has no fault.

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

[0147] It is understandable that the vehicle also includes a dashboard, which is connected to the control module 1 via a SAEJ1939 bus, wherein SAEJ1939 is a CAN bus-based protocol designed for network system control and communication of heavy vehicles such as trucks and buses. The dashboard is used to display the 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 the transmission combination, 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] Fig. 9 1 is a schematic diagram of the structure of a vehicle power take-off fault detection device provided according to an embodiment of the present invention. Fig. 9As shown, the device comprises:

[0150] A power take-off solenoid valve detection module 610, used to detect the circuit connection state 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 hand 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 parameter meets the preset combined input condition;

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

[0154] The feedback signal receiving module 650 is used to determine that the power take-off has no fault 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] Fig.10 is a schematic diagram of the structure of a power take-off fault detection device provided according to an embodiment of the present invention. The power take-off fault detection device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The power take-off fault detection device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0157] like Fig.10As shown, the power take-off fault detection device 70 includes at least one processor 71, and a memory connected to the at least one processor 71 in communication, such as a read-only memory (ROM) 72, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 71 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 72 or the computer program loaded from the storage unit 78 to the random access memory (RAM) 73. In the RAM 73, various programs and data required for the operation of the power take-off fault detection device 70 can also be stored. The processor 71, the ROM 72, and the RAM 73 are connected to each other through a bus 74. An input / output (I / O) interface 75 is also connected to the bus 74.

[0158] A number of components in the power take-off fault detection device 70 are connected to the 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 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 through a computer network such as the Internet and / or various telecommunication networks.

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

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

[0161] Various implementations of the systems and techniques described above herein 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), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including 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, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, 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 combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, 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 interaction with a user, the systems and techniques described herein may be implemented on a power take-off fault detection device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or trackball), through which a user may provide input to the power take-off fault detection device. Other types of devices may also be used to provide interaction with a user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0165] The systems and techniques described herein may be implemented in a computing system that includes backend 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 frontend components (e.g., a user computer with a graphical user interface or a 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 backend components, middleware components, or frontend components. The components of the system may 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 a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0167] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0168] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for detecting a power take-off failure of a vehicle, characterized in that: 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; The power take-off is connected to the power take-off solenoid valve through an air circuit; the pressure sensor is arranged 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 of the power take-off and the transmission; The power take-off fault detection method comprises: Detecting the circuit connection status of the power take-off solenoid valve; 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; the combined input parameters include output shaft speed information, gear position information and hand brake information; When it is detected that the combined input parameter satisfies 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, characterized in that: Detecting the circuit connection state of the power take-off solenoid valve includes: Acquiring the 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, characterized in that: 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, characterized in that: 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; Acquiring 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, characterized in that: 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-up state, the pressure of the air circuit is detected.

6. The method for detecting a power take-off failure according to claim 1, characterized in that: 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 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 comprises: When it is detected that the gas circuit pressure is lower than the preset pressure, a prompt of a gas circuit failure of the power take-off 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, characterized in that: When it is detected that the combination 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 that the vehicle is in a non-parking state; and / or, When the gear information is detected to be in a non-neutral state, a prompt is issued that the vehicle is in a non-neutral state; and / or, When it is detected that the handbrake information is not in the pulled-up state, a prompt is issued that the vehicle handbrake is in the unpulled state.

8. A vehicle power take-off fault detection device, characterized in that: include: A power take-off solenoid valve detection module, used to detect the circuit connection state of the power take-off solenoid valve; A combined input parameter detection module is used to detect whether the combined input parameter meets a preset combined input condition when it is detected that the circuit of the power take-off solenoid valve is in a conducting state; the combined input parameter includes output shaft speed information, gear position information and hand brake information; A gas circuit pressure detection module, used to detect the pressure of the gas circuit when it is detected that the combined input parameter meets the preset combined input condition; A feedback signal acquisition module, used for acquiring a feedback signal of the power take-off combined with a feedback switch when it is detected 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 fault 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 as described in any one of claims 1-7.

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 1-7 is implemented.

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