Control valve assembly for realizing dynamic monitoring and fault diagnosis and treatment and control method thereof

Abstract

The invention discloses a control valve assembly capable of achieving dynamic monitoring and fault diagnosis and treatment and a control method thereof, and mainly solves the technical problem that when an internal oil way of an existing control valve assembly breaks down, the disassembly and maintenance difficulty is large. The system comprises a valve body, an oil path arranged in the valve body, an information acquisition unit arranged outside the valve body and a plurality of external pipelines, first pressure regulating valves are installed at different positions of the oil way respectively, and each first pressure regulating valve is provided with a pressure measuring point. The information acquisition unit comprises a plurality of pressure sensors corresponding to the first pressure regulating valves; the input end of each pressure sensor is connected with the corresponding pressure measuring point. The external pipelines are in one-to-one correspondence with the first pressure regulating valves respectively and are communicated with the oil ways at the two ends of the first pressure regulating valves respectively; and a second pressure regulating valve is mounted on the external pipeline and is in a normally closed state. The pressure of the oil way is monitored in real time, when the oil way breaks down, a driver can conduct emergency disposal conveniently, and therefore the safety of vehicle driving is improved.

Description

Technical Field

[0001] The invention relates to a hydraulic system fault diagnosis method, and in particular to a control valve assembly for realizing dynamic monitoring and fault diagnosis and disposal and a control method thereof. Background Art

[0002] The control valve assembly is the core assembly of the hydraulic system of a high-power hydraulic mechanical transmission box. Its function is to ensure the realization of various functions of the hydraulic mechanical transmission box by adjusting the working pressure of the hydraulic system.

[0003] The control valve assembly is a precision hydraulic product. The gap between the valve core and the valve hole is generally 3 to 7 μm, and the oil cleanliness requirements are relatively high during use. Mechanical products will inevitably produce metal particles during operation. These metal particles will enter the control valve assembly with the oil, which can easily cause the valve core to get stuck, causing the entire hydraulic system to be disordered, thereby directly affecting the normal operation of the hydraulic mechanical transmission box, and in severe cases, causing the vehicle to be unable to drive. At the same time, the existing control valve assembly has a complex internal oil circuit and relatively high requirements for environmental cleanliness, but it is difficult to inspect it in the field. When the internal oil circuit of the control valve assembly fails, it is difficult to disassemble and repair it, which greatly reduces the efficiency of maintenance. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problems that when the internal oil circuit of the existing control valve assembly fails, the vehicle will be unable to drive, and the disassembly and repair are difficult when the failure occurs, and to provide a control valve assembly and a control method thereof that can realize dynamic monitoring and fault diagnosis and disposal.

[0005] To achieve the above objectives, the technical solutions provided by the present invention are:

[0006] A control valve assembly for realizing dynamic monitoring and fault diagnosis and treatment, used in conjunction with an electronic control unit, has the following features:

[0007] It includes a valve body, an oil circuit arranged in the valve body, an information collection unit arranged outside the valve body, and a plurality of external pipes;

[0008] First pressure regulating valves are installed at different positions on the oil circuit, and each first pressure regulating valve is provided with a pressure measuring point;

[0009] The information acquisition unit includes a plurality of pressure sensors corresponding to the first pressure regulating valve; the input end of each pressure sensor is respectively connected to the corresponding pressure measuring point for real-time acquisition of pressure information of the corresponding oil circuit; the output end of each pressure sensor is respectively used to connect to the electronic control unit;

[0010] Each external pipeline corresponds to each first pressure regulating valve one by one, and is connected to the oil circuits at both ends of the corresponding first pressure regulating valve; a second pressure regulating valve is installed on each external pipeline, and is in a normally closed state.

[0011] Furthermore, the plurality of external pipes are all located at the top of the valve body.

[0012] Furthermore, the output end of the pressure sensor is connected to the electronic control unit via a wiring harness or a wireless transmitter.

[0013] Furthermore, the pressure sensor is installed on the top or side of the valve body.

[0014] At the same time, the present invention also provides a control method for a control valve assembly for realizing dynamic monitoring and fault diagnosis and treatment, comprising the following steps:

[0015] Step 1, assembling the above control valve assembly for realizing dynamic monitoring and fault diagnosis and treatment;

[0016] Step 2: start the control valve assembly described in step 1, monitor the pressure information of each oil circuit in real time through the pressure sensor, and transmit the pressure information to the electronic control unit;

[0017] Step 3: The electronic control unit interprets the received pressure information. When all the pressure information meets the preset requirements, it means that the oil circuit is normal, and the process returns to step 2 to continue collecting information. When any pressure information does not meet the preset requirements, it means that the oil circuit is faulty, and the process goes to step 4.

[0018] Step 4: The electronic control unit feeds back the location of the first pressure regulating valve corresponding to the faulty oil circuit based on the judgment result, opens the second pressure regulating valve on the external pipeline corresponding to the first pressure regulating valve, opens the external pipeline, and adjusts the pressure in the external pipeline to the working pressure to achieve the penetration of the oil circuit, thereby completing the fault diagnosis and emergency treatment of the control valve assembly.

[0019] Furthermore, in step 3, the electronic control unit is pre-loaded with software for interpreting pressure information, and the interpretation result is displayed in real time.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The control valve assembly for realizing dynamic monitoring and fault diagnosis and disposal proposed by the present invention has multiple external pipes corresponding to the first pressure regulating valve arranged outside the valve body, and multiple pressure sensors are arranged to monitor the oil circuit pressure in real time. The electronic control unit can obtain and judge the pressure information in real time. When the pressure of each oil circuit is abnormal, the electronic control unit will prompt the fault information and the maintenance location and content, so as to realize early fault warning and diagnosis and improve the safety and reliability of vehicle driving.

[0022] 2. In the control valve assembly for realizing dynamic monitoring and fault diagnosis and disposal proposed by the present invention, the external pipeline can be arranged at the top of the valve body, so as to facilitate the opening and adjustment of the second pressure regulating valve when the oil circuit fails, and also facilitate installation and subsequent maintenance.

[0023] 3. In the control valve assembly for realizing dynamic monitoring and fault diagnosis and disposal proposed by the present invention, the pressure information of the oil circuit can be monitored in real time through the pressure sensor, so that abnormal information can be detected at the first time, which is convenient for the driver to take emergency disposal measures and improves the safety of vehicle driving.

[0024] 4. In the control valve assembly for realizing dynamic monitoring and fault diagnosis and disposal proposed by the present invention, an external pipeline with a second pressure regulating valve is provided to avoid the problem of hydraulic system abnormality caused by oil circuit blockage of the control valve assembly, which makes the vehicle unable to drive in the field, thereby improving the field maintainability of the control valve assembly.

[0025] 5. The control method of the control valve assembly for realizing dynamic monitoring and fault diagnosis and disposal proposed by the present invention is simple to operate, easy to realize, and applicable to the control valve assembly of any vehicle model, and has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0027] Figure 2 This is a hydraulic principle diagram of each first pressure regulating valve in an embodiment of the present invention when it works normally.

[0028] Figure 3 It is a hydraulic principle diagram when each first pressure regulating valve in an embodiment of the present invention works abnormally.

[0029] The reference numerals are as follows:

[0030] 1-valve body, 2-oil circuit, 3-external pipeline, 4-first pressure regulating valve, 5-pressure sensor, 6-second pressure regulating valve. DETAILED DESCRIPTION

[0031] In order to make the purpose, advantages and features of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not used to limit the scope of protection of the present invention.

[0032] Combination Figure 1 , Figure 2 , Figure 3As shown, this embodiment provides a control valve assembly for realizing dynamic monitoring and fault diagnosis and treatment, including a valve body 1, an oil circuit 2 arranged in the valve body 1, an information collection unit arranged outside the valve body 1, and a plurality of external pipes 3. Among them, first pressure regulating valves 4 are respectively installed at different positions on the oil circuit 2, and each first pressure regulating valve 4 is respectively provided with a pressure measuring point.

[0033] The information collection unit includes a plurality of pressure sensors 5 corresponding to the first pressure regulating valve 4, and the pressure sensors 5 can be installed on the top or side of the valve body. The input end of each pressure sensor 5 is respectively connected to the corresponding pressure measuring point to collect the pressure information of the corresponding oil circuit 2; the output end of each pressure sensor 5 transmits the pressure information to the electronic control unit of the vehicle through a wiring harness or a wireless transmitter, and the electronic control unit performs a logical judgment on the received pressure information (i.e., judges whether the pressure information is abnormal) and displays the judgment result in real time.

[0034] Of course, according to actual needs, the electronic control unit and the control valve assembly can be designed as an integrated structure to achieve automatic monitoring and control of the control valve assembly.

[0035] Each external pipeline 3 corresponds to each first pressure regulating valve 4 one by one, and is connected to the oil circuit 2 at both ends of the corresponding first pressure regulating valve 4. Multiple external pipelines 3 are located at the top of the valve body 1, and each external pipeline 3 is respectively installed with a second pressure regulating valve 6, and all are in a normally closed state. The external pipeline 3 can also be installed on the side of the valve body 1 or other positions according to the specific structure of the control valve assembly to ensure that its layout does not affect the connection between the control valve assembly and other equipment.

[0036] When the pressure of oil circuit 2 of the control valve assembly is abnormal, the electronic control unit will prompt the abnormal pressure information of the specific faulty oil circuit, and at the same time prompt the maintenance location and maintenance content of the abnormal oil circuit, so as to realize real-time dynamic monitoring of the pressure of each oil circuit of the control valve and early fault warning and diagnosis.

[0037] Through real-time dynamic monitoring of the pressure of the control valve assembly and early fault warning diagnosis, fault diagnosis and maintenance can be performed at the early stage of abnormal operation of each first pressure regulating valve 4, thereby solving the problem of hydraulic system failure caused by control valve assembly failure, which causes the function of the entire hydraulic mechanical transmission box to be reduced or unable to be realized. At the same time, it also reduces the functional failure rate and maintenance cost of the control valve assembly, improves the reliability of the control valve assembly, improves the working stability of the hydraulic system, and thus improves the driving safety and reliability of the vehicle.

[0038] In addition, this embodiment also provides a control method for a control valve assembly for realizing dynamic monitoring and fault diagnosis and treatment, comprising the following steps:

[0039] Step 1: Assemble the control valve assembly for dynamic monitoring and fault diagnosis and treatment described in this embodiment. The external pipe 3 is set according to the position of the first pressure regulating valve 4, and the external pipe is in a normally closed state in the initial state and when the oil circuit is normal.

[0040] Step 2: Start the control valve assembly, monitor the pressure information of each oil circuit 2 in real time through the pressure sensor 5, and transmit the pressure information to the electronic control unit through the pressure sensor 5.

[0041] Step 3: The electronic control unit interprets the received pressure information. When all the pressure information meets the preset requirements, it means that the oil circuit 2 is normal. At this time, it returns to step 2 for continuous monitoring and collection. Figure 2 As shown, when the oil circuit 2 is normal, the second pressure regulating valve 6 on the external pipe 3 is in a closed state. When the pressure information transmitted by any pressure sensor 5 does not meet the preset requirements, it means that the oil circuit 2 is faulty, and step 4 is entered at this time.

[0042] In this embodiment, the electronic control unit is preloaded with software for judging pressure information, which can judge in real time whether there is any abnormality in the pressure information and display the judgment result in real time so that the operator can obtain the abnormal information in time.

[0043] Step 4, the electronic control unit feeds back the location of the first pressure regulating valve 4 corresponding to the faulty oil circuit 2 based on the judgment result. Oil circuit failure generally refers to the first pressure regulating valve 4 causing the oil circuit to be blocked due to a valve core jam or other faults. At this time, the electronic control unit will indicate the specific fault location. The operator generally needs to stop the vehicle for processing, and according to the feedback from the electronic control unit, open the external pipeline 3 corresponding to the first pressure regulating valve 4 where the fault is located, and adjust the second pressure regulating valve 6 on the external pipeline 3 to adjust the pressure of the external pipeline 3 to the working pressure, thereby achieving the connection of the oil circuit 2, allowing the control valve assembly to work normally, and ensuring that the vehicle can continue to drive normally. As for specific faults, you can wait until the vehicle drives to a safe area before disassembling and repairing it.

[0044] like Figure 3 As shown, when the oil circuit 2 is abnormal, the second pressure regulating valve 6 on the external pipeline 3 is in an open state, that is, the external pipeline 3 is activated as a backup oil circuit to ensure that the oil circuit of the entire control valve assembly is connected.

[0045] The above method can realize emergency disposal of control valve assembly oil circuit failure, solve the problem of hydraulic system abnormality caused by control valve assembly failure, and make the vehicle unable to drive, improve the off-site maintenance and disposal of the control valve assembly, and improve the driving reliability of the vehicle.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present invention.

Claims

1. A control valve assembly for realizing dynamic monitoring and fault diagnosis and treatment, used in conjunction with an electronic control unit, characterized in that: It comprises a valve body (1), an oil circuit (2) arranged inside the valve body (1), an information collection unit arranged outside the valve body (1), and a plurality of external pipes (3); First pressure regulating valves (4) are respectively installed at different positions on the oil circuit (2), and each first pressure regulating valve (4) is respectively provided with a pressure measuring point; The information collection unit comprises a plurality of pressure sensors (5) corresponding to the first pressure regulating valve (4); the input end of each pressure sensor (5) is respectively connected to a corresponding pressure measuring point for collecting pressure information of the corresponding oil circuit (2); the output end of each pressure sensor (5) is respectively used for connecting to the electronic control unit; Each external pipeline (3) corresponds to each first pressure regulating valve (4) one by one, and is respectively connected to the oil circuit (2) at both ends of the corresponding first pressure regulating valve (4); each external pipeline (3) is respectively installed with a second pressure regulating valve (6), and is in a normally closed state.

2. The control valve assembly for realizing dynamic monitoring and fault diagnosis and treatment according to claim 1 is characterized in that: The plurality of external pipes (3) are all located at the top of the valve body (1).

3. The control valve assembly for realizing dynamic monitoring and fault diagnosis and treatment according to claim 1 or 2, characterized in that: The output end of the pressure sensor (5) is connected to the electronic control unit via a wiring harness or a wireless transmitter.

4. The control valve assembly for realizing dynamic monitoring and fault diagnosis and treatment according to claim 3 is characterized in that: The pressure sensor (5) is installed on the top or side of the valve body (1).

5. A control method for a control valve assembly for realizing dynamic monitoring and fault diagnosis and treatment, characterized in that: The following steps are involved: Step 1, assembling the control valve assembly for realizing dynamic monitoring and fault early warning diagnosis as described in any one of claims 1 to 4; Step 2: Start the control valve assembly, monitor the pressure information of each oil circuit (2) in real time through the pressure sensor (5), and transmit the pressure information to the electronic control unit; Step 3: The electronic control unit interprets the received pressure information. When all the pressure information meets the preset requirements, it means that the oil circuit (2) is normal, and the process returns to step 2 to continue collecting pressure information. When any pressure information does not meet the preset requirements, it means that the oil circuit (2) is faulty, and the process proceeds to step 4. Step 4: The electronic control unit feeds back the location of the first pressure regulating valve (4) corresponding to the faulty oil circuit (2) based on the judgment result, opens the second pressure regulating valve (6) on the external pipeline (3) corresponding to the first pressure regulating valve (4), thereby opening the external pipeline (3), and adjusting the pressure in the external pipeline (3) to the working pressure, so as to achieve the connection of the oil circuit (2), thereby completing the fault diagnosis and emergency treatment of the control valve assembly.

6. The control method for a control valve assembly for realizing dynamic monitoring and fault diagnosis and treatment according to claim 5, characterized in that: In step 3, the electronic control unit is preloaded with software for interpreting pressure information, and the interpretation result is displayed in real time.

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