Control method and device of hydraulic system, hydraulic system and vehicle

Abstract

The application relates to a hydraulic system control method and device, a hydraulic system and a vehicle. The method comprises the following steps: determining a leakage type of the hydraulic system according to a leakage amount of hydraulic oil; determining a first leakage control strategy according to the leakage type; and controlling the hydraulic system to stop running according to the first leakage control strategy. Thus, active control of the hydraulic system can be realized after monitoring the hydraulic oil leakage, and the safety of the hydraulic system operation can be improved.

Description

Technical Field

[0001] This application relates to the field of engineering hydraulics technology, and more specifically, to a control method for a hydraulic system, a control device for a hydraulic system, a hydraulic system, and a vehicle. Background Technology

[0002] With the increasing popularity of hydraulic systems, various problems have arisen during their use. One typical problem is hydraulic oil leakage. Once hydraulic oil leaks, it causes a drop in pressure within the hydraulic system, affecting its normal operation.

[0003] Current solutions for hydraulic system leaks rely on displacement or pressure sensors to detect leaks. However, these solutions cannot actively control the hydraulic system's operation after a leak is detected. Summary of the Invention

[0004] One objective of this application is to provide a new technical solution for controlling hydraulic systems.

[0005] According to a first aspect of this application, a control method for a hydraulic system is provided, comprising:

[0006] Determine the type of leakage in the hydraulic system based on the amount of hydraulic oil leakage;

[0007] Based on the leakage type, determine the first leakage control strategy;

[0008] According to the first leakage control strategy, the hydraulic system is controlled to stop operating.

[0009] Optionally, the leakage type includes a first leakage type and a second leakage type, wherein the leakage amount corresponding to the second leakage type is less than a preset value, and the leakage amount corresponding to the first leakage type is greater than or equal to the preset value;

[0010] The step of determining the first leakage control strategy based on the leakage type includes:

[0011] If the leakage type is the first leakage type, a first sub-leakage control strategy is determined;

[0012] When the leakage type is the second leakage type, a second sub-leakage control strategy is determined; wherein, the first sub-leakage control strategy includes immediately controlling the hydraulic system to stop operating, and the second sub-leakage control strategy includes controlling the hydraulic system to stop operating after a first preset time period.

[0013] Optionally, the second sub-leakage control strategy further includes controlling the hydraulic system to stop operating after a second preset time period if a request to continue operation is received before the end of the first preset time period.

[0014] Optionally, the control loop of the hydraulic system includes at least a first control loop and a second control loop. The second sub-leakage control strategy further includes switching the control loop of the hydraulic system from the first control loop to the second control loop, wherein the total length of the second control loop is shorter than the total length of the first control loop.

[0015] Optionally, the control loop of the hydraulic system includes multiple segments, and before controlling the hydraulic system to stop operating according to the first leakage control strategy, the method further includes:

[0016] For any given road segment, determine the leakage status of that road segment;

[0017] Based on the leakage status, a second leakage control strategy is determined, the second leakage control strategy including the leakage location of the output hydraulic system;

[0018] The step of controlling the hydraulic system to stop operating according to the first leakage control strategy includes:

[0019] Based on the first leakage control strategy and the second leakage control strategy, the hydraulic system is controlled to stop operating.

[0020] Optionally, the second leakage control strategy further includes, when the leakage state is a leakage, controlling the hydraulic system to perform at least one of the following: audible alarm, displaying alarm information, generating and storing fault codes, and displaying fault codes.

[0021] Optionally, the hydraulic system includes an oil reservoir for storing hydraulic oil, and before determining the leakage type of the hydraulic system based on the leakage amount of the hydraulic oil, the method further includes:

[0022] The amount of hydraulic oil leakage is determined based on the change in oil volume output by the calibrator and / or level sensor in the oil storage tank.

[0023] According to a second aspect of this application, a control device for a hydraulic system is provided, comprising: a memory for storing computer instructions, and a processor for retrieving the computer instructions from the memory to perform a method as described in any one of the first aspects of this application.

[0024] According to a third aspect of this application, a hydraulic system is provided, comprising: a first control circuit, a second control circuit, and a control device.

[0025] The control device is electrically connected to the first control loop and the second control loop respectively, and is used to perform the method as described in any one of the first aspects of this application;

[0026] The first control loop or the second control loop includes an oil reservoir, an oil pump, a hydraulic actuator, and a hydraulic valve. The oil reservoir, oil pump, hydraulic actuator, and hydraulic valve divide the first control loop or the second control loop into multiple segments.

[0027] The total length of the second control loop is smaller than the total length of the first control loop.

[0028] According to a fourth aspect of this application, a vehicle is provided, characterized in that it includes the system described in a third aspect of this application.

[0029] This application's embodiments determine the leakage type based on the amount of hydraulic oil leakage in the hydraulic system, determine a leakage control strategy based on the leakage type, and control the hydraulic system to stop operating according to the leakage control strategy. This not only enables proactive control of the hydraulic system after detecting hydraulic oil leakage but also improves the safety of the hydraulic system's operation.

[0030] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments of this application with reference to the accompanying drawings. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0032] Figure 1 This is a schematic block diagram of a hydraulic system provided in an embodiment of this application.

[0033] Figure 2 This is a schematic flowchart of a control method for a hydraulic system provided in an embodiment of this application.

[0034] Figure 3 This is a schematic flowchart of another hydraulic system control method provided in the embodiments of this application. Detailed Implementation

[0035] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0036] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0037] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0038] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0040] To facilitate understanding, the hydraulic system involved in this application will first be described. The hydraulic system of the embodiments of this application may include a first control circuit, a second control circuit, and a control device.

[0041] The control device is electrically connected to both the first and second control circuits. The control device can be used to control the operation of the hydraulic system.

[0042] As an example, such as Figure 1 As shown, the first control loop and the second control loop partially overlap. The first control loop may include an oil reservoir 1100, an oil pump 1200, a hydraulic actuator 1300, hydraulic valve A, hydraulic valve B, and hydraulic valve C. These components divide the first control loop into multiple segments, such as high-pressure oil circuit 1, high-pressure oil circuit 2, and low-pressure oil circuit 1. The second control loop may also include an oil reservoir 1100, an oil pump 1200, a hydraulic actuator 1300, hydraulic valve A, and hydraulic valve C. These components divide the second control loop into multiple segments, such as high-pressure oil circuit 3 and low-pressure oil circuit 1.

[0043] The relationship between the lengths of the segments in the second control loop and the total length of the segments in the first control loop is not specifically defined. In some embodiments, the total length of the segments in the second control loop may be smaller than the total length of the segments in the first control loop. For example, the length of high-pressure oil circuit 3 is smaller than the total length of high-pressure oil circuit 1 and high-pressure oil circuit 2.

[0044] The oil reservoir 1100 can be used to store hydraulic oil. The oil reservoir 1100 can be equipped with a scale or level sensor, which can accurately determine the amount of hydraulic oil in the reservoir.

[0045] Oil pump 1200 can supply high-pressure hydraulic oil to the hydraulic system. A pressure sensor can be built into oil pump 1200 to detect the pressure within the pump. The pressure reading from this sensor can be used to determine if there is a hydraulic oil leak in the hydraulic system.

[0046] The hydraulic actuator 1300 converts the pressure of hydraulic oil into mechanical energy to drive the load in linear or rotary motion. The hydraulic actuator 1300 can be, for example, a hydraulic cylinder or a hydraulic motor. The load can be, for example, a piston.

[0047] Hydraulic valves A, B, and C can be solenoid valves. Hydraulic valve A can have ports A11, A21, and A22. Ports A11 and A21 are open by default, while port A22 is closed by default. When ports A11 and A21 are open and port A22 is closed, hydraulic oil can flow into high-pressure oil circuit 1. When ports A11 and A22 are open and port A21 is closed, hydraulic oil can flow into high-pressure oil circuit 3.

[0048] Hydraulic valve B may have ports B11 and B21. Ports B11 and B21 are open by default. When ports B11 and B21 are open, hydraulic oil can flow from high-pressure oil line 1 into high-pressure oil line 2.

[0049] Hydraulic valve B can have a built-in leakage sensor 1. Leakage sensor 1 can be deployed at port B21 of hydraulic valve B, and can detect whether there is a leak of hydraulic oil at port B21.

[0050] Hydraulic valve C can have ports C11, C21, and C22. Ports C11 and C22 are open by default, while port C21 is closed by default. When ports C11 and C22 are open and port C21 is closed, hydraulic oil can flow from high-pressure oil circuit 2 into low-pressure oil circuit 1. When ports C22 and C21 are open and port C11 is closed, hydraulic oil can flow from high-pressure oil circuit 3 into low-pressure oil circuit 1.

[0051] Hydraulic valve C can have a built-in leakage sensor 2. Leakage sensor 2 can be deployed at port C22 of hydraulic valve C, and can detect whether there is a leak of hydraulic oil at port C22.

[0052] The oil storage tank 1100, oil pump 1200, hydraulic actuator 1300, hydraulic valve A, hydraulic valve B and hydraulic valve C are connected by oil pipeline sections.

[0053] One-way valves can be installed in each oil pipeline section. For example, a one-way valve can be installed at port B21 near hydraulic valve B in high-pressure oil line 2. The one-way valve enables unidirectional flow and prevents hydraulic oil backflow. A relief valve can be installed at the input end of hydraulic actuator 1300 to ensure stable pressure output to hydraulic actuator 1300.

[0054] The control device 1000 can also receive the oil volume output from the oil reservoir 1100 and determine whether hydraulic oil is leaking based on changes in the oil volume. If, after a preset period of operation, the difference in oil volume output from the oil reservoir 1100 is within the normal range, it can be preliminarily determined that no hydraulic oil leakage has occurred. If the difference in oil volume output from the oil reservoir 1100 over a preset period of time exceeds the normal range, it is determined that hydraulic oil is leaking. In this case, the difference in oil volume is the amount of hydraulic oil leakage.

[0055] The control device 1000 can also be used to receive the pressure of the hydraulic oil output by the oil pump 1200 and determine whether the hydraulic oil is leaking based on the pressure change. When the pressure of the hydraulic oil output by the oil pump 1200 is within the normal range after operating for a preset period of time, it can be preliminarily determined that the hydraulic oil is not leaking. When the pressure of the hydraulic oil output by the oil pump 1200 decreases after operating for a preset period of time and exceeds the normal range, it is determined that the hydraulic oil is leaking.

[0056] The control device 1000 can also receive the leakage status output by the leakage sensor built into hydraulic valve A, hydraulic valve B or hydraulic valve C to determine whether hydraulic oil is leaking.

[0057] In this embodiment, the control device 1000 can determine whether hydraulic oil is leaking by integrating the information output from the oil storage tank 1100, oil pump 1200, hydraulic valve A, hydraulic valve B, and hydraulic valve C.

[0058] The following is combined with Figure 2 This application introduces a control method for a hydraulic system according to an embodiment. The method includes steps S100 to S120.

[0059] Step S100: Determine the leakage type of the hydraulic system based on the amount of hydraulic oil leakage.

[0060] In this embodiment, the amount of hydraulic oil leakage is the change in hydraulic oil level between the previous moment and the current moment when hydraulic oil leakage occurs.

[0061] A calibration gauge and / or level sensor can be built into the oil reservoir 1100. The amount of hydraulic oil leakage is determined based on the oil volume output by the calibration gauge and / or level sensor in the oil reservoir. As an example, the oil volume output by the calibration gauge and / or level sensor at a previous time is obtained, and after a preset time period, the oil volume output by the calibration gauge and / or level sensor at the current time is obtained. The difference between the two oil volume measurements can be used as the amount of hydraulic oil leakage. Of course, other methods can also be used to obtain changes in oil volume to determine the amount of hydraulic oil leakage.

[0062] The leakage amount over a preset time period can be calculated, and the leakage type of the hydraulic system can be determined based on this leakage amount. Alternatively, the average leakage amount over multiple preset time periods can be calculated, and the leakage type of the hydraulic system can be determined based on this average leakage amount. As an example, the leakage amount S1 for the first preset time period, the leakage amount S2 for the second preset time period, and the leakage amount S3 for the third preset time period are calculated separately. The average leakage amount S of S1, S2, and S3 is then calculated, and the leakage type of the hydraulic system is determined based on the average leakage amount S.

[0063] In this embodiment, the leakage type may include a first leakage type and a second leakage type. Of course, more leakage types can also be set according to the degree of leakage to distinguish more leakage situations.

[0064] A preset value can be set. The leakage amount corresponding to the second leakage type is less than the preset value. The leakage amount corresponding to the first leakage type is greater than or equal to the preset value. That is, when the leakage amount of hydraulic oil is greater than or equal to the preset value, the leakage type of the hydraulic system is determined to be the first leakage type. When the leakage amount of hydraulic oil is less than the preset value, the leakage type of the hydraulic system is determined to be the second leakage type. In some embodiments, the first leakage type can be understood as the leakage amount being large enough to significantly affect driving safety. The second leakage type can be understood as the leakage amount being relatively small and not having a significant impact on the hydraulic system in a short period of time. That is, in the case of the first leakage type, the hydraulic system needs to be stopped immediately to prevent an accident. In the case of the second leakage type, the hydraulic system can continue to operate within the allowable time range.

[0065] The preset value can be a specific oil volume, such as 50ml. Alternatively, it can be a percentage of the total hydraulic system oil volume, such as 0.5%. The specific value of the preset value can be set according to actual needs and is not specifically limited here.

[0066] In this embodiment, corresponding leakage control strategies can be pre-defined for different leakage types. These leakage control strategies can be strategies for providing leakage information to users, strategies for controlling the hydraulic system to stop operating after a leakage occurs, or other control strategies. A leakage control strategy corresponding to a leakage type can include one or more of the above strategies. For example, a leakage control strategy corresponding to a leakage type can include a voice alarm, control the hydraulic system to stop operating, or both a voice alarm and control the hydraulic system to stop operating.

[0067] Step S110: Determine the first leakage control strategy based on the leakage type.

[0068] Step S120: According to the first leakage control strategy, control the hydraulic system to stop operating.

[0069] The first leakage control strategy may include a first sub-leakage control strategy and a second sub-leakage control strategy. In some embodiments, step S110 may include steps S112 to S114.

[0070] Step S112: If the leakage type is the first leakage type, determine the first sub-leakage control strategy.

[0071] In this embodiment, the first sub-leakage control strategy may include immediately stopping the hydraulic system. Figure 1 Taking the provided hydraulic system as an example, stopping the hydraulic system means controlling one or more of solenoid valves A, B, or C to be in the closed state, and controlling oil pump 1200 to stop running.

[0072] In this embodiment, when the leakage type is the first leakage type (i.e., the leakage amount exceeds the preset value), the hydraulic system is immediately controlled to stop operating, which can improve the safety of the hydraulic system to a certain extent.

[0073] Step S114: If the leakage type is the second leakage type, determine the second sub-leakage control strategy.

[0074] In some embodiments, the second sub-leakage control strategy may include controlling the hydraulic system to stop operating after a first preset duration. If the leakage type of the hydraulic system is determined to be a second leakage type, the hydraulic system is maintained in operation for the first preset duration before the hydraulic system is controlled to stop operating.

[0075] The first preset duration can be set from a safety perspective, and there is no specific limit to its length. For example, the first preset duration could be 2 minutes.

[0076] In this embodiment, the hydraulic system may further include a display terminal. The first preset duration can be displayed on the display terminal in the form of a countdown.

[0077] In this embodiment, when the leakage type is the second leakage type (i.e., the leakage amount does not exceed the preset value), the hydraulic system can continue to work for a first preset time before stopping operation, which can increase the flexibility of the hydraulic system.

[0078] In other embodiments, the second sub-leakage control strategy may further include controlling the hydraulic system to stop operating after a second preset time period if a continue-operation request is received before the end of the first preset time period. In this embodiment, when the leakage type of the hydraulic system is determined to be the second leakage type, it checks whether a continue-operation request is received before the end of the first preset time period, and if a continue-operation request is received, it controls the hydraulic system to stop operating after the second preset time period.

[0079] The second preset duration can also be set from a safety perspective, and there is no limit to its specific length. For example, the second preset duration could be 10 minutes.

[0080] The relationship between the first preset duration and the second preset duration is not specifically defined. Optionally, the first preset duration may be shorter than the second preset duration.

[0081] In this embodiment, while the vehicle display terminal displays the first preset duration, it can also send a prompt message to the display terminal asking whether the hydraulic system needs to be forced to continue operating, so that the driver can make a choice based on the actual situation. The driver can make the choice at any time before the first preset duration ends. When the driver's request to force the hydraulic system to continue operating is received, the hydraulic system is kept running for a second preset duration before being controlled to stop operating.

[0082] As an example, suppose the hydraulic system leak is determined to occur 10 minutes after the system starts running, with a first preset duration of 2 minutes and a second preset duration of 10 minutes. If a request to force the hydraulic system to continue running is received 11 minutes after it starts running, the system will continue running for 10 minutes before being shut down. In other words, the system will continue running for 21 minutes before being shut down.

[0083] This embodiment can also force the hydraulic system to run for a second preset time before the first preset time ends, according to actual needs, further increasing the flexibility of the hydraulic system.

[0084] In other embodiments, the second sub-leakage control strategy may further include switching the control loop of the hydraulic system from the first control loop to the second control loop. Figure 1 Taking the hydraulic system as an example, the first control loop is: oil reservoir 1100 - oil pump 1200 - hydraulic valve A - hydraulic valve B - hydraulic valve C - hydraulic actuator 1300 - oil reservoir 1100. The second control loop is: oil reservoir 1100 - oil pump 1200 - hydraulic valve A - hydraulic valve C - hydraulic actuator 1300 - oil reservoir 1100.

[0085] In this embodiment, the total length of the second control loop is shorter than the total length of the first control loop. The first control loop is the default control loop. When a second type of leakage occurs in the first control loop, the control loop is switched to the second control loop.

[0086] Optionally, when a second type of leakage occurs in the first control circuit, the control circuit of the hydraulic system can be switched from the first control circuit to the second control circuit. Then, the system can continue to detect whether there is a leakage in the second control circuit. If the second control circuit also has a second type of leakage, the hydraulic system can be stopped after a first preset time.

[0087] Optionally, when a second type of leakage occurs in the first control circuit, the control circuit of the hydraulic system can be switched from the first control circuit to the second control circuit. Then, the system continues to detect whether there is a leakage in the second control circuit. If a second type of leakage also exists in the second control circuit, and a request to continue operation is received before the end of the first preset time period, the hydraulic system is controlled to stop operating after the second preset time period.

[0088] by Figure 1 Taking the provided hydraulic system as an example. If the leakage type of the current first control circuit is detected to be the second leakage type, then hydraulic valve B is controlled to be closed, port A21 of hydraulic valve A is closed, and port A22 is opened. Furthermore, if no request to continue operation is received before the end of the first preset time period, the hydraulic system continues to run for the first preset time period before at least one of hydraulic valves A or C is controlled to be closed, and oil pump 1200 is stopped. If the leakage type of the current first control circuit is detected to be the second leakage type, then hydraulic valve B is controlled to be closed, port A21 of hydraulic valve A is closed, and port A22 is opened. Furthermore, if a request to continue operation is received before the end of the first preset time period, after the second preset time period, at least one of hydraulic valves A or C is controlled to be closed, and oil pump 1200 is stopped.

[0089] In this embodiment, when a second type of leakage occurs in the first control circuit, switching the control circuit to the shorter second control circuit can shorten the hydraulic oil circulation time, which is beneficial for maintaining the continued operation of the hydraulic system. Furthermore, if the leakage in the first control circuit occurs in high-pressure oil lines 1 and 2, switching to the second control circuit can also prevent further hydraulic oil leakage.

[0090] This application's embodiments determine the leakage type based on the amount of hydraulic oil leakage in the hydraulic system, determine a leakage control strategy based on the leakage type, and control the hydraulic system to stop operating according to the leakage control strategy. This not only enables proactive control of the hydraulic system after detecting hydraulic oil leakage but also improves the safety of the hydraulic system's operation.

[0091] In the hydraulic system of this application embodiment, the first control circuit or the second control circuit can be divided into multiple segments. Based on this, this application embodiment also provides another hydraulic system control method. For example... Figure 3 As shown, before step S120, the method may further include steps S200 to S210.

[0092] Step S200: For any given road segment, determine the leakage status of that road segment.

[0093] In this embodiment, the hydraulic valve connected to each segment can have a built-in leakage sensor, which can detect the leakage status of each segment. As an example, the leakage sensor built into hydraulic valve B can detect whether there is a leak in high-pressure oil line 1. The leakage sensor built into hydraulic valve C can detect whether there is a leak in high-pressure oil line 2 or high-pressure oil line 3. Furthermore, a leakage sensor deployed in low-pressure oil line 1 can also detect whether there is a leak in that segment. In this example, when the leakage sensor built into hydraulic valve C detects a leak, it may mean that at least one segment of high-pressure oil line 1, high-pressure oil line 2, or high-pressure oil line 3 is leaking.

[0094] Step S210: Determine a second leakage control strategy based on the leakage status.

[0095] In this embodiment, the second leakage control strategy may include the leakage location of the output hydraulic system. If a leakage occurs in either the first or second control loop, the second leakage control strategy is determined to be the leakage location of the output hydraulic system. If no leakage occurs in either the first or second control loop, the second leakage control strategy is determined to be either not outputting any information or outputting information indicating that no leakage has occurred.

[0096] In the embodiments of this application, the execution order of steps S100 to S110 and steps S200 to S210 is not limited. They can be performed simultaneously, or steps S200 to S210 can be executed first and then steps S100 to S110 can be executed, or steps S100 to S110 can be executed first and then steps S200 to S210 can be executed.

[0097] In this embodiment, step S120 may include step S220.

[0098] Step S220: Control the hydraulic system to stop operating according to the first leakage control strategy and the second leakage control strategy.

[0099] In this embodiment, the leakage location of the hydraulic system can be obtained according to the second leakage control strategy, and then the hydraulic system can be stopped according to the first leakage control strategy.

[0100] As an example, if the leakage location of the hydraulic system is determined to be high-pressure oil circuit 1 according to the second leakage control strategy, then the A11 and A21 ports of the hydraulic valve A are controlled to be closed, and the oil pump 1200 is controlled to stop running.

[0101] As another example, if the leakage location of the hydraulic system is determined to be at least one of high-pressure oil circuit 1, high-pressure oil circuit 2, or high-pressure oil circuit 3 according to the second leakage control strategy, then the B11 port and B21 port of the control hydraulic valve B are closed, the A21 port of the control hydraulic valve A is closed, and the A11 port and A22 port are open, and then step S100 is executed.

[0102] In some embodiments, the second leakage control strategy may further include, when a leakage occurs, controlling the hydraulic system to perform at least one of the following: audible alarm, displaying alarm information, generating and storing a fault code, and displaying a fault code. In this embodiment, depending on actual needs, in the event of a leakage in either the first or second control loop, after controlling the hydraulic system to perform at least one of the above instructions, the hydraulic system may not be stopped. In this embodiment, the display terminal may provide information on whether to automatically stop the hydraulic system.

[0103] Before determining the leakage type of the hydraulic system or the leakage status of each section of the control circuit in the hydraulic system, a self-test can be performed on the hardware devices such as the oil reservoir 1100, oil pump 1200, hydraulic actuator 1300, hydraulic valve A, hydraulic valve B, and hydraulic valve C in the hydraulic system to determine whether each hardware device can work normally.

[0104] As an example, after the hydraulic system starts running, the following steps S300 to S330 are performed.

[0105] Step S300: Start the hydraulic system and check whether the oil pump 1200, pressure sensor, solenoid valve A, solenoid valve B, solenoid valve C, and each leakage sensor are normal.

[0106] In step S310, the control device 1000 analyzes the specific location of the leak through the feedback signals from each leak sensor; and by analyzing the oil volume in the oil reservoir (oil tank 1100) through the scale analyzer and level sensor, it accurately confirms the amount of leaked hydraulic oil, and then confirms whether it is the first type of leak or the second type of leak.

[0107] In step S320, when the control device 1000 analyzes and confirms that the leakage is of the first type, it immediately controls the system to output a command to control each solenoid valve to close the corresponding input and output ports, and controls the oil pump 1200 to stop running.

[0108] When the control device 1000 analyzes and confirms that the leakage is of the second type, the control system switches the control loop from the default first control loop to the second control loop. If no request to continue operation is received after a countdown of 2 minutes, the control system closes the corresponding input and output ports of each solenoid valve and stops the electric oil pump.

[0109] When the control device 1000 analyzes and confirms that the leakage is of the second type, the control system switches the control loop from the default first control loop to the second control loop. If a request to continue operation is received before the countdown ends in 2 minutes, the hydraulic system continues to run for 10 minutes. After the countdown ends in 10 minutes, the control system closes the corresponding input and output ports of each solenoid valve and stops the electric oil pump.

[0110] Step S330: Send an alarm signal command and control the display terminal to display alarm information, while generating and storing a fault code.

[0111] According to the second leakage control strategy, this embodiment can accurately obtain the leakage location of the hydraulic system, and achieve precise control based on the accurate leakage location and the first leakage control strategy.

[0112] This application also provides a control device for a hydraulic system. The device includes a memory for storing computer instructions, and a processor for retrieving the computer instructions from the memory to execute any of the methods provided in the above embodiments.

[0113] This application also provides a hydraulic system. The system may include a first control circuit, a second control circuit, and a control device.

[0114] The control device is electrically connected to the first control loop and the second control loop respectively, and is used to execute any of the methods provided in the above embodiments.

[0115] The first or second control loop includes an oil reservoir, an oil pump, hydraulic actuators, and hydraulic valves, which divide the first or second control loop into multiple segments.

[0116] The total length of the second control loop is shorter than the total length of the first control loop.

[0117] This application also provides a vehicle including the hydraulic system provided in this application embodiment.

[0118] This application may be a system, method, and / or computer program product. A computer program product may include a computer-readable storage medium having computer-readable program instructions loaded thereon for causing a processor to implement various aspects of this application.

[0119] Computer-readable storage media can be tangible devices capable of holding and storing instructions for use by an instruction execution device. Computer-readable storage media can be, for example, but not limited to, electrical storage devices, magnetic storage devices, optical storage devices, electromagnetic storage devices, semiconductor storage devices, or any suitable combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disc read-only memory (CD-ROM), digital multifunction disc (DVD), memory sticks, floppy disks, mechanical encoding devices, such as punch cards or recessed protrusions storing instructions thereon, and any suitable combination thereof. The computer-readable storage media used herein are not to be construed as transient signals themselves, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (e.g., light pulses through fiber optic cables), or electrical signals transmitted through wires.

[0120] The computer-readable program instructions described herein can be downloaded from computer-readable storage media to various computing / processing devices, or downloaded via a network, such as the Internet, local area network, wide area network, and / or wireless network, to an external computer or external storage device. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards them to the computer-readable storage media in the respective computing / processing device.

[0121] The computer program instructions used to perform the operations of this application may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, etc., and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The computer-readable program instructions may be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or may be connected to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, electronic circuits, such as programmable logic circuits, field-programmable gate arrays (FPGAs), or programmable logic arrays (PLAs), are personalized by utilizing state information from the computer-readable program instructions. These electronic circuits can execute the computer-readable program instructions to implement various aspects of this application.

[0122] Various aspects of this application are described herein with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-readable program instructions.

[0123] These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that, when executed by the processor of the computer or other programmable data processing apparatus, they create means for implementing the functions / actions specified in one or more blocks of the flowchart and / or block diagram. These computer-readable program instructions can also be stored in a computer-readable storage medium that causes a computer, programmable data processing apparatus, and / or other device to operate in a particular manner; thus, the computer-readable medium storing the instructions comprises an article of manufacture that includes instructions for implementing aspects of the functions / actions specified in one or more blocks of the flowchart and / or block diagram.

[0124] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to perform the functions / actions specified in one or more boxes of a flowchart and / or block diagram.

[0125] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of an instruction containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions. It will be well known to those skilled in the art that implementation in hardware, implementation in software, and implementation using a combination of software and hardware are equivalent.

[0126] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technical improvements to the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this application is defined by the appended claims.

Claims

1. A control method of a hydraulic system, characterized by, The method comprises: determining a leakage type of the hydraulic system according to a leakage amount of the hydraulic oil; determining a first leakage control strategy according to the leakage type; controlling the hydraulic system to stop running according to the first leakage control strategy; wherein the leakage type comprises a first leakage type and a second leakage type, the second leakage type corresponds to a leakage amount less than a preset value, and the first leakage type corresponds to a leakage amount greater than or equal to the preset value; the determining of the first leakage control strategy according to the leakage type comprises: in a case where the leakage type is the first leakage type, determining a first sub-leakage control strategy; in a case where the leakage type is the second leakage type, determining a second sub-leakage control strategy; wherein the first sub-leakage control strategy comprises immediately controlling the hydraulic system to stop running, and the second sub-leakage control strategy comprises controlling the hydraulic system to stop running after a first preset time length; and the control circuit of the hydraulic system comprises at least a first control circuit and a second control circuit, and the second sub-leakage control strategy further comprises switching the control circuit of the hydraulic system from the first control circuit to the second control circuit, wherein a total length of paths of the second control circuit is shorter than a total length of paths of the first control circuit.

2. The method of claim 1, wherein, The second sub-leakage control strategy further comprises, in a case where a continue running request is received before the first preset time length ends, controlling the hydraulic system to stop running after a second preset time length.

3. The method of claim 1, wherein, The control circuit of the hydraulic system comprises a plurality of paths, and before the hydraulic system is controlled to stop running according to the first leakage control strategy, the method further comprises: for any path, determining a leakage state of the path; determining a second leakage control strategy according to the leakage state, the second leakage control strategy comprising outputting a leakage position of the hydraulic system; the controlling of the hydraulic system to stop running according to the first leakage control strategy comprises: controlling the hydraulic system to stop running according to the first leakage control strategy and the second leakage control strategy.

4. The method of claim 3, wherein, The second leakage control strategy further comprises, in a case where the leakage state is leakage, controlling the hydraulic system to perform at least any one of the following: sound control alarm, display alarm information, generate and store fault code, and display fault code.

5. The method of claim 1, wherein, The hydraulic system comprises an oil storage tank for storing hydraulic oil, and before the leakage type of the hydraulic system is determined according to the leakage amount of the hydraulic oil, the method further comprises: determining the leakage amount of the hydraulic oil according to a change in the amount of oil output by a scale and / or a liquid level sensor in the oil storage tank.

6. A control device of a hydraulic system characterized by comprising: The method comprises: a memory for storing computer instructions, and a processor for calling the computer instructions from the memory to execute the method of any one of claims 1 to 5.

7. A hydraulic system characterized by, The method comprises: a first control circuit, a second control circuit, and a control device, the control device is electrically connected with the first control circuit and the second control circuit respectively, and is configured to execute the method of any one of claims 1 to 5. The first control circuit or the second control circuit comprises an oil storage tank, an oil pump, a hydraulic actuating element and a hydraulic valve, and the oil storage tank, the oil pump, the hydraulic actuating element and the hydraulic valve divide the first control circuit or the second control circuit into multiple sections. The total length of the sections of the second control circuit is less than the total length of the sections of the first control circuit.

8. A vehicle characterized by comprising: The system as claimed in claim 7.

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