Lubricating system, lubricating control method, controller and vehicle

Abstract

The invention provides a lubricating system, a lubricating control method, a controller and a vehicle. Relates to the technical field of engineering vehicles and comprises a controller, and a lubricating pump, a first pressure sensor and a second pressure sensor which are respectively connected with the controller. Wherein the lubricating pump is used for pumping a lubricating agent from the storage device into the at least one oil injector through the main pipeline; the first pressure sensor is arranged on the main pipeline, located between the lubricating pump and the at least one oil injector and used for detecting the outlet pressure of the lubricating pump. The second pressure sensor is arranged at the tail end of the main pipeline and used for detecting the tail end pressure of the main pipeline; and the controller is used for determining whether the working cycle of the lubricating pump is ended or not according to the pressure detected by the second pressure sensor. The system is used for automatic lubrication control of the engineering vehicle, the end time of the working cycle of the lubrication pump can be accurately judged by detecting the pressure at the tail end of the main pipeline, it is ensured that a lubricant accurately covers all lubrication points, mechanical abrasion is reduced, and the lubrication effect is improved.

Description

Technical Field

[0001] This application relates to the field of engineering vehicle technology, and in particular to a lubrication system, lubrication control method, controller, and vehicle. Background Technology

[0002] In construction vehicles (such as excavators, bulldozers, and loaders), a single-line lubrication system is typically used. In the working cycle of a single-line lubrication system, the lubrication pump delivers lubricant to the main pipeline, which then delivers the lubricant to the lubricator, which in turn supplies lubricant to each lubrication point. In this operating mode, accurately determining when to end the working cycle—that is, when the lubrication pump stops operating—is crucial to ensuring that all lubrication points receive adequate lubrication.

[0003] However, in the above method, due to the high viscosity of the lubricant, the pressure loss generated by the lubricant flowing in the main pipeline cannot be predicted, which results in the lubrication pump outlet pressure not accurately representing the working pressure required by the injector, and thus the accuracy of the lubrication pump working cycle is poor. Summary of the Invention

[0004] This application provides a lubrication system, lubrication control method, controller, and vehicle for more accurately determining the working cycle of the lubrication pump.

[0005] In a first aspect, this application provides a lubrication system, including: a controller, and a lubrication pump, a first pressure sensor, and a second pressure sensor respectively connected to the controller;

[0006] The lubrication pump is used to pump lubricant from a storage device into at least one injector via a main pipeline;

[0007] The first pressure sensor is disposed on the main pipeline and located between the lubrication pump and at least one oil injector, for detecting the outlet pressure of the lubrication pump;

[0008] The second pressure sensor is disposed at the end of the main pipeline and is used to detect the pressure at the end of the main pipeline;

[0009] The controller is used to determine whether to end the working cycle of the lubrication pump based on the pressure detected by the second pressure sensor.

[0010] In one possible implementation, the lubrication system further includes a temperature sensor connected to the controller for detecting ambient temperature;

[0011] The controller is also used to control the operating status of the lubrication pump according to the ambient temperature.

[0012] Secondly, this application provides a lubrication control method, applied to a controller in a lubrication system according to any one of the first aspects, the lubrication control method comprising:

[0013] During the operation of the lubrication pump, a first pressure at the outlet of the lubrication pump and a second pressure at the end of the main pipeline that delivers lubricant to at least one injector are obtained;

[0014] The working cycle of the lubrication pump is controlled based on the first pressure and the second pressure.

[0015] In one possible implementation, controlling the working cycle of the lubrication pump based on the first pressure and the second pressure includes:

[0016] If the first pressure reaches the second preset pressure before the second pressure reaches the first preset pressure, the lubrication pump is controlled to stop working, and the new first pressure at the outlet of the lubrication pump is obtained in real time.

[0017] If the new first pressure drops to the third preset pressure, the lubrication pump is controlled to start working;

[0018] Repeat the above steps until the second pressure reaches the first preset pressure, then control the lubrication pump to stop working;

[0019] Wherein, the second preset pressure is greater than the third preset pressure, and the third preset pressure is greater than the first preset pressure.

[0020] In one possible implementation, the lubrication control method further includes:

[0021] If a pressure sensor malfunction is detected, the running time of the lubrication pump is obtained. The pressure sensor includes a first pressure sensor installed at the outlet of the lubrication pump and a second pressure sensor installed at the end of the main pipeline.

[0022] Get the current ambient temperature;

[0023] Based on the pre-set mapping relationship between ambient temperature and lubrication pump running time, the expected running time corresponding to the current ambient temperature is determined;

[0024] Based on the expected runtime and the runtime already completed, the lubrication pump is controlled to stop operating.

[0025] In one possible implementation, controlling the lubrication pump to stop operating based on the expected runtime and the already run time includes:

[0026] The difference between the expected runtime and the runtime already completed is determined as the target runtime.

[0027] After the target running time has elapsed, the lubrication pump is controlled to continue operating, and then stopped.

[0028] In one possible implementation, the lubrication control method further includes:

[0029] During the operation of the lubrication system, the running time of the lubrication pump when the pressure at the end of the main pipeline reaches the first preset pressure is obtained under different ambient temperatures;

[0030] The mapping relationship is established based on multiple ambient temperatures and the running time of the lubrication pump corresponding to each ambient temperature.

[0031] In one possible implementation, the lubrication control method further includes:

[0032] When a pressure sensor malfunction is detected, a malfunction alarm message is sent through the alarm device;

[0033] And / or,

[0034] The current ambient temperature and the operating time of the lubrication pump are displayed in the visualization interface.

[0035] Thirdly, this application provides a controller, including: a memory, a processor, and an interaction interface;

[0036] The memory is used to store computer-executed instructions;

[0037] The processor executes computer execution instructions stored in the memory, causing the processor to perform the lubrication control method according to any of the second aspects.

[0038] Fourthly, this application provides an engineering vehicle, including an engineering vehicle body; and a lubrication system as described in any of the first aspects, or a controller as described in the third aspect.

[0039] Fifthly, this application provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the lubrication control method as described in any of the second aspects above.

[0040] In a sixth aspect, this application provides a computer program product, including a computer program that, when executed by a processor, is used to implement the lubrication control method as described in any of the second aspects above.

[0041] This application provides a lubrication system, a lubrication control method, a controller, and a vehicle. The lubrication system includes a controller, a lubrication pump, a first pressure sensor, and a second pressure sensor connected thereto. The lubrication pump functions to deliver lubricant from a storage device to at least one injector via a main pipeline. The first pressure sensor is mounted on the main pipeline between the lubrication pump and the at least one injector, and is used to detect the outlet pressure of the lubrication pump. The second pressure sensor is located at the end of the main pipeline and is used to monitor the pressure at that location. The controller determines whether to terminate the lubrication pump's operating cycle based on the pressure detected by the second pressure sensor. In this lubrication system, the controller can accurately determine whether to terminate the lubrication pump's operating cycle based on the pressure detected by the second pressure sensor. This function ensures that the lubricant effectively covers all lubrication points, avoiding mechanical wear caused by insufficient lubrication, while also preventing heat generation or energy loss due to excessive operation of the lubrication pump, thereby improving the reliability of the lubrication system. Attached Figure Description

[0042] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0043] Figure 1 This is a schematic diagram of an existing lubrication system;

[0044] Figure 2 This is a schematic diagram of the structure of the lubrication system provided in the embodiments of this application;

[0045] Figure 3 A schematic flowchart of Embodiment 1 of the lubrication control method provided in this application;

[0046] Figure 4 This application provides a schematic diagram of the working cycle of a lubrication pump.

[0047] Figure 5 A schematic flowchart of Embodiment 2 of the lubrication control method provided in this application;

[0048] Figure 6 This is a schematic diagram of another lubrication pump working cycle provided in an embodiment of this application;

[0049] Figure 7 A schematic flowchart of Embodiment 3 of the lubrication control method provided in this application;

[0050] Figure 8 A flowchart illustrating an example of a lubrication control method provided in this application;

[0051] Figure 9 This is a schematic diagram of the controller provided in an embodiment of this application.

[0052] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0053] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0054] On construction vehicles such as excavators, bulldozers, and loaders, lubrication solutions generally employ a single-line lubrication system, which is relatively simple in structure and cost-effective. In this system's operating cycle, a lubrication pump acts as the power source, delivering lubricant to the main pipeline. The pressurized lubricant flows through the main pipeline, driving at least one lubricator. Ultimately, these lubricators precisely distribute and deliver the lubricant to each lubrication point on the construction vehicle.

[0055] In this operating mode, accurately determining when to end the lubrication system's working cycle, i.e., when to stop the lubrication pump, becomes crucial for the lubrication system's operation. Ending the working cycle too early may result in lubricant not reaching all lubrication points, causing mechanical parts to wear more rapidly due to insufficient lubrication; conversely, delaying the end of the working cycle can easily lead to excessive waste of lubricant, increasing operating costs.

[0056] In related technologies, in single-line lubrication systems, the lubrication pump outlet pressure is typically detected by a pressure sensor located at the pump outlet to determine whether to terminate the lubrication pump's working cycle. However, due to the high viscosity of the lubricant, the pressure loss generated by the lubricant flowing in the main pipeline cannot be estimated, resulting in a significant difference between the lubrication pump outlet pressure and the pressure at the end of the main pipeline. Often, when the lubrication pump outlet pressure reaches the lubricator's working pressure, the pressure at the end of the main pipeline is still insufficient. This means that the lubrication pump outlet pressure cannot accurately represent the working pressure required by the lubricator, leading to poor accuracy in determining whether to terminate the lubrication pump's working cycle based on the lubrication pump outlet pressure.

[0057] To address the aforementioned issues, the inventors have proposed a lubrication system in which a pressure sensor is installed at the end of the main lubrication line to detect the pressure at the end of the main line in real time and feed the pressure data back to the controller. Based on the pressure data provided by the pressure sensor, the controller can more accurately determine when to stop the working cycle of the lubrication pump, thereby improving the accuracy of the end of the working cycle of the lubrication pump.

[0058] In addition, the aforementioned pressure sensor is used to detect the pressure at the end of the main pipeline. By detecting this pressure, the required operating pressure of the lubricator can be accurately characterized. This detection method enables a more accurate assessment of the actual operating condition of the lubrication system, ensuring that the lubricant reaches each lubrication point fully and without waste.

[0059] Figure 1 This is a schematic diagram of an existing lubrication system. Please refer to [link / reference]. Figure 1 The existing lubrication system 10 includes a controller 11, a storage device 12, a lubrication pump 13, a main pipeline 14, a first pressure sensor 15, and an oil injector 16. The lubrication pump 13 is equipped with an electric motor 17.

[0060] The first pressure sensor 15 is disposed on the main pipeline 14 and located between the lubrication pump 13 and at least one lubricator 16, for detecting the outlet pressure of the lubrication pump 13; the controller 11 is used to output a control signal to control the motor 17 based on the pressure detected by the first pressure sensor 14, and to determine whether to terminate the working cycle of the lubrication pump 13. The lubricant flowing through the lubricator 16 can flow to various lubrication points in the engineering vehicle, and the storage device 12 is used to store the lubricant. The first pressure sensor 14 is also referred to as the pump-end pressure sensor.

[0061] The technical solution of this application and how it solves the above-mentioned technical problems will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0062] Figure 2 This is a schematic diagram of the lubrication system provided in an embodiment of this application. Please refer to... Figure 2 The lubrication system 20 includes a controller 21, a storage device 22, a lubrication pump 23, a main pipeline 24, a first pressure sensor 25, an oil injector 26, and a second pressure sensor 27. The lubrication pump 23 is equipped with an electric motor 28.

[0063] The lubrication pump 23 is used to pump lubricant from the storage device 22 into at least one oiler 26 via the main pipeline 24;

[0064] Lubricants generally refer to substances used to reduce friction and protect the surface of mechanical parts, including liquid (lubricating oil) and semi-solid (lubricating grease) forms.

[0065] The first pressure sensor 25 is disposed on the main pipeline 24 and located between the lubrication pump 23 and at least one oiler 26, for detecting the outlet pressure of the lubrication pump 23;

[0066] The second pressure sensor 27 is located at the end of the main pipeline 24 and is used to detect the pressure at the end of the main pipeline;

[0067] The first pressure sensor 14 is also called the pump end pressure sensor, and the second pressure sensor is also called the main pipeline end pressure sensor; for example, the pressure acquisition point of the second pressure sensor can be the inlet pressure of the oiler furthest from the lubrication pump.

[0068] The controller 21 is used to determine whether to end the working cycle of the lubrication pump 23 based on the pressure detected by the second pressure sensor 27.

[0069] In one specific implementation, the controller 21 can output a control signal to stop the motor 28 when the pressure detected by the second pressure sensor 27 reaches a preset value, thereby determining the end of the working cycle of the lubrication pump 23.

[0070] It should be noted that, Figure 2 An electrically driven scheme for the lubrication pump is shown; alternatively, a hydraulically driven scheme can also be used. The controller controls the operation of the hydraulic pump by controlling the on / off state of the solenoid valve, and the hydraulic pump drives the lubrication pump.

[0071] The lubrication system provided in this application includes a controller, a lubrication pump connected to the controller, a first pressure sensor, and a second pressure sensor. The lubrication pump delivers lubricant from a storage device to at least one injector via a main pipeline. The first pressure sensor is installed on the main pipeline, between the lubrication pump and the at least one injector, and is used to detect the outlet pressure of the lubrication pump. The second pressure sensor is installed at the end of the main pipeline and is used to detect the pressure at the end of the main pipeline. The controller determines whether to terminate the working cycle of the lubrication pump based on the pressure detected by the second pressure sensor. By adding a second pressure sensor at the end of the main pipeline, the controller can directly measure the pressure at the end of the main pipeline, overcoming the pressure loss problem caused by the high viscosity of the lubricant, thereby accurately reflecting the working pressure required by the injector.

[0072] Furthermore, this direct measurement method improves the accuracy of the controller in determining when the lubrication pump's working cycle ends, effectively preventing insufficient lubrication at the lubrication points due to insufficient pressure at the end of the main pipeline, while also avoiding overheating or energy loss caused by the lubrication pump running for too long.

[0073] In one possible design, such as Figure 2 As shown, the lubrication system 20 also includes a temperature sensor 29 connected to the controller 21 for detecting ambient temperature;

[0074] The controller 21 is also used to control the operating status of the lubrication pump 23 according to the ambient temperature.

[0075] In one optional implementation, if a pressure sensor malfunction is detected during the operation of the lubrication pump 23, the elapsed running time of the lubrication pump 23 can be obtained, and the current ambient temperature can be obtained through the temperature sensor 29. Based on a pre-set mapping relationship between ambient temperature and lubrication pump running time, the expected running time corresponding to the current ambient temperature is determined; based on the expected running time and the elapsed running time, the lubrication pump 23 is controlled to stop operating. The pressure sensors include a first pressure sensor 25 located at the lubrication pump outlet and a second pressure sensor 27 located at the end of the main pipeline.

[0076] In the above implementation, a temperature sensor connected to the controller is added to the lubrication system to detect the ambient temperature. When the pressure sensor fails, the controller in the lubrication system can control the operating status of the lubrication pump based on the ambient temperature. This design allows the lubrication system to continue operating and performing its lubrication function even in the event of a pressure sensor failure, thereby ensuring the normal operation of the engineering vehicle.

[0077] Figure 3 This is a schematic flowchart illustrating an embodiment of the lubrication control method provided in this application. Please refer to [link / reference]. Figure 3 This lubrication control method is applied to Figure 2 The controller in the lubrication system shown includes:

[0078] S301. During the operation of the lubrication pump, obtain the first pressure at the outlet of the lubrication pump and the second pressure at the end of the main pipeline that delivers lubricant to at least one injector;

[0079] In this step, the controller can obtain the first pressure at the outlet of the lubrication pump by means of a first pressure sensor located on the main pipeline and between the lubrication pump and at least one injector; and obtain the second pressure at the end of the main pipeline where the lubrication pump delivers lubricant to at least one injector by means of a second pressure sensor located at the end of the main pipeline.

[0080] S302. Control the working cycle of the lubrication pump according to the first pressure and the second pressure.

[0081] In this step, the controller can control the working cycle of the lubrication pump based on the acquired first and second pressures. Specifically, if the first pressure reaches the second preset pressure before the second pressure reaches it, the lubrication pump can be stopped, and the new first pressure at the lubrication pump outlet can be acquired in real time through the first pressure sensor; if the new first pressure drops to the third preset pressure, the lubrication pump can be started; the above steps are repeated until the second pressure reaches the first preset pressure, at which point the lubrication pump stops.

[0082] Among them, the second preset pressure is greater than the third preset pressure, and the third preset pressure is greater than the first preset pressure.

[0083] Specifically, the first preset pressure, the second preset pressure, and the third preset pressure can be preset according to the working requirements of the lubrication system to ensure that the lubricant can be effectively transmitted and distributed to each lubrication point in the lubrication system, thereby maintaining the normal operation of the engineering vehicle.

[0084] Figure 4 This is a schematic diagram of the working cycle of a lubrication pump provided in an embodiment of this application. Please refer to... Figure 4 The controller can send working commands to the lubrication pump to start it and enter the working stage. When the pressure at the end of the main pipeline (second pressure) reaches the first preset pressure P1 (the pressure required by the lubricator), the controller cuts off the power to the lubrication pump, stops the lubrication pump, and enters the waiting stage; at the same time, the controller can record the working time of the lubrication pump at the corresponding temperature.

[0085] In one optional implementation, during the process of the pressure at the end of the main pipeline reaching the first preset pressure P1, the lubrication pump outlet pressure (first pressure) can be monitored by a first pressure sensor (pump end pressure sensor). If the pressure reaches the maximum pressure P0 that the main pipeline can withstand, the lubrication pump is controlled to stop urgently. Monitoring whether the lubrication pump outlet pressure reaches the maximum pressure P0 that the main pipeline can withstand can refer to the safety protection measures taken during the operation process of appropriately increasing the lubrication pump outlet pressure in order to quickly bring the pressure at the end of the main pipeline to the first preset pressure P1.

[0086] In another optional implementation, a second preset pressure P2 and a third preset pressure P3 can be set between P1 and P0, where P2 is greater than P3. Before the pressure at the end of the main pipeline reaches P1, the lubrication pump is cyclically started and stopped. When the pressure at the pump outlet reaches P2, the lubrication pump operation is paused; when the pressure drops to P3, the lubrication pump is restarted. Until the pressure at the end of the main pipeline reaches P1, the power supply to the lubrication pump is cut off, completely stopping the lubrication pump operation and entering a waiting phase.

[0087] In this embodiment, the controller can acquire a first pressure at the lubrication pump outlet via a first pressure sensor and a second pressure at the end of the main pipeline supplying lubricant to at least one lubricator via a second pressure sensor during the operation of the lubrication pump. Based on the first and second pressures, the controller controls the working cycle of the lubrication pump. In this process, the controller uses the arrival of a preset value at the second pressure at the end of the main pipeline as the termination time for the lubrication pump's working cycle, ensuring that the lubricant reaches all lubrication points under appropriate pressure, thus improving the lubrication effect.

[0088] Figure 5 This is a schematic flowchart illustrating Embodiment 2 of the lubrication control method provided in this application. Please refer to... Figure 5 ,exist Figure 3 Based on the illustrated embodiment, the lubrication control method may further include:

[0089] S501. If a pressure sensor malfunction is detected, obtain the running time of the lubrication pump.

[0090] In this step, the controller can perform fault detection on the pressure sensors during the operation of the lubrication pump. If a pressure sensor fault is detected, the operating time of the lubrication pump can be obtained. The pressure sensors include a first pressure sensor located at the lubrication pump outlet and a second pressure sensor located at the end of the main pipeline.

[0091] Specifically, the running time refers to the duration the lubrication pump has been operating before the pressure sensor malfunctions.

[0092] A pressure sensor malfunction could refer to the controller detecting abnormal pressure data, such as the pressure data provided by the first pressure sensor and / or the second pressure sensor exceeding the preset normal range; or the first pressure sensor and / or the second pressure sensor failing to provide pressure data within the expected time.

[0093] For example, if the controller detects that the pressure data provided by the second pressure sensor exceeds the preset normal range during the operation of the lubrication pump, it can obtain the running time of the lubrication pump. The running time of the lubrication pump can be T1.

[0094] S502, Obtain the current ambient temperature.

[0095] In this step, the controller can obtain the current ambient temperature by accessing a temperature sensor pre-set in the lubrication system. For example, the controller can obtain the current ambient temperature as θ℃ by accessing a temperature sensor pre-set in the lubrication system.

[0096] In one alternative implementation, the engine intake air temperature or the air conditioning outside air temperature can also be used as the current ambient temperature.

[0097] S503. Based on the pre-set mapping relationship between ambient temperature and lubrication pump running time, determine the expected running time corresponding to the current ambient temperature.

[0098] In this step, after the controller determines that the pressure sensor is faulty and obtains the current ambient temperature, it can determine the expected running time corresponding to the current ambient temperature based on the pre-set mapping relationship between the ambient temperature and the running time of the lubrication pump.

[0099] Optionally, the mapping relationship between ambient temperature and lubrication pump running time can be obtained through the following steps ①②.

[0100] Step ①: During the operation of the lubrication system, obtain the running time of the lubrication pump when the pressure at the end of the main pipeline reaches the first preset pressure under different ambient temperatures.

[0101] Step 2: Establish a mapping relationship based on multiple ambient temperatures and the running time of the lubrication pump corresponding to each ambient temperature.

[0102] In one specific implementation, the controller can establish a mapping relationship using integer bits of the ambient temperature, thereby simplifying the operating logic and improving the response speed.

[0103] For example, after the controller determines that the pressure sensor is faulty and obtains the current ambient temperature as θ℃, it can determine the expected running time of the lubrication pump at the current ambient temperature θ℃ as T based on the pre-set mapping relationship between the ambient temperature and the running time of the lubrication pump.

[0104] S504. Based on the expected running time and the running time already completed, control the lubrication pump to stop working.

[0105] In this step, the controller can stop the lubrication pump based on the expected runtime and the runtime already completed. Specifically, the difference between the expected runtime and the runtime already completed can be determined as the target runtime. The lubrication pump can then continue operating for the target runtime before stopping.

[0106] For example, if the expected running time corresponding to the current ambient temperature θ℃ is determined to be T based on the mapping relationship, then the difference T2 between the expected running time T and the running time T1 can be determined as the target running time. After the lubrication pump continues to work for the target running time T2, the lubrication pump is controlled to stop working.

[0107] Figure 6 This is a schematic diagram of another lubrication pump's working cycle provided in an embodiment of this application. Please refer to... Figure 6The controller can send working commands to the lubrication pump to start it and initiate its working phase. If the first pressure sensor (pump-end pressure sensor) at the lubrication pump outlet malfunctions and cannot detect the outlet pressure, the lubrication pump can be operated in stages to ensure that the outlet pressure does not exceed the maximum pressure P0 that the main pipeline can withstand. If the second pressure sensor (main pipeline end pressure sensor) at the end of the main pipeline malfunctions and cannot detect the end pressure, the expected running time of the lubrication pump (i.e., the total running time) can be controlled to ensure that the end pressure of the main pipeline meets the requirements of the lubricator. The total running time of the lubrication pump can be obtained by accessing the historical operating records of the lubrication pump under the current ambient temperature.

[0108] For example, after the controller sends a working command to the lubrication pump, it detects a fault in the pressure sensor at the end of the main pipeline. In order to prevent overpressure in the lubrication system, the controller can control the lubrication pump to run in three stages, including: (1) running the lubrication pump for half of the total running time; (2) pausing for 3 seconds; (3) running the lubrication pump for one-quarter of the total running time; (4) pausing for 3 seconds; and (5) running the lubrication pump for the remaining one-quarter of the total running time.

[0109] Optionally, the mapping relationship can also be implemented using a calibration database, which reflects the correspondence between ambient temperature and lubrication pump operating time. In practice, the calibration program and the execution program can run synchronously, with the controller automatically recording the lubrication pump's operating time and the corresponding ambient temperature. The calibration program runs automatically once a day, recording the lubrication pump's operating time and ambient temperature, and storing this data in the calibration database.

[0110] Furthermore, if a pressure sensor malfunction is detected during the operation of the lubrication pump, the pump's elapsed runtime can be obtained. Next, the expected runtime of the lubrication pump at the current ambient temperature is retrieved from the calibration database. Then, based on the expected runtime and the elapsed runtime, the lubrication pump is controlled to continue operating for a certain period before stopping.

[0111] In one specific implementation, if the controller detects a pressure sensor malfunction when starting the lubrication pump, it can determine that the lubrication pump's running time is zero. Subsequently, the controller can directly control the operation of the lubrication pump based on the expected running time corresponding to the current ambient temperature, and control the lubrication pump to stop operating after the lubrication pump's running time reaches the expected running time.

[0112] In this embodiment, if a pressure sensor malfunction is detected during the normal operation of the lubrication pump, the controller can obtain the current ambient temperature. Based on a pre-set mapping relationship between ambient temperature and lubrication pump runtime, it determines the expected runtime corresponding to the current ambient temperature. Then, based on the expected runtime and the already run time, it controls the lubrication pump to stop operating. In this process, the runtime of the lubrication pump can be dynamically adjusted using the current ambient temperature when a pressure sensor malfunctions, improving the reliability of the lubrication system.

[0113] Figure 7 This is a schematic flowchart illustrating Embodiment 3 of the lubrication control method provided in this application. Please refer to... Figure 7 ,exist Figure 5 Based on the illustrated embodiment, the lubrication control method may further include:

[0114] S701. When a pressure sensor malfunction is detected, a malfunction alarm message is sent through the alarm device.

[0115] Specifically, the alarm device can be a display in the cab of the engineering vehicle, or an alarm light.

[0116] For example, the controller can control the alarm light to flash when a pressure sensor malfunction is detected, so as to remind the user (such as the driver) that the pressure sensor has malfunctioned and should be dealt with in a timely manner.

[0117] For example, when a pressure sensor malfunction is detected, the controller can display a fault alarm message on the monitor in the cab of the engineering vehicle, indicating that the pressure sensor has malfunctioned and should be repaired promptly.

[0118] In one optional implementation, when the controller detects a pressure sensor malfunction, it can send a fault alarm message to the user dispatch center through the host's communication unit. This timely notification helps the dispatch center to take appropriate measures, coordinate maintenance resources, and arrange for technicians to carry out repairs, thereby minimizing the downtime of engineering vehicles and the impact of the malfunction.

[0119] Furthermore, when a pressure sensor malfunction is detected, the controller can send detailed fault information to the manufacturer via the host communication unit. This detailed information may include, but is not limited to, the fault type, the time of occurrence, and the symptoms. By transmitting this detailed fault information to the manufacturer, the manufacturer can more quickly analyze the problem, provide technical support, or dispatch maintenance personnel for on-site repair. This information-sharing mechanism not only helps to quickly resolve current problems but also allows the manufacturer to accumulate data to improve the design of engineering vehicles, thereby enhancing their reliability.

[0120] For example, when the controller detects a pressure sensor malfunction, it can send detailed fault information to the manufacturer via the host's communication unit, including:

[0121] Fault type: First pressure sensor malfunction;

[0122] Time of failure: 14:30 on October 15, 2020;

[0123] Fault symptoms: Power supply voltage 25.6 volts (V), sensor output current: 0.3 milliamps (mA).

[0124] S702. Displays the current ambient temperature and the operating time of the lubrication pump in a visual interface.

[0125] Optionally, the visualization interface may include a monitor or dashboard in the cab. By displaying the current ambient temperature on the visualization interface, users can understand the working conditions of the engineering vehicle. By displaying the working time of the lubrication pump on the visualization interface, users can clearly grasp the working progress and status of the lubrication pump.

[0126] For example, the cab of an engineering vehicle is equipped with a display. The display can show the current ambient temperature as θ℃ and the operating time of the lubrication pump as T1.

[0127] In one optional implementation, the visualization interface can also display the pressure data detected in real time by the first pressure sensor and the second pressure sensor, as well as the cumulative operating time of the lubrication pump; by comparing the pressure data of the first pressure sensor and the second pressure sensor, the pressure loss of the lubrication system can be determined, thereby assessing the health status of the lubrication system; by using the cumulative operating time of the lubrication pump, maintenance and upkeep cycles can be reasonably arranged to ensure the normal operation of the lubrication pump.

[0128] In this embodiment, when the controller detects a pressure sensor malfunction, it can send a fault alarm message through an alarm device to notify the user that the pressure sensor has malfunctioned, thereby improving the user's response speed to pressure sensor malfunctions. In addition, the controller can also display the current ambient temperature and the working time of the lubrication pump in real time through a visual interface. The intuitive data display can help users quickly understand the working environment of the engineering vehicle and the operating status of the lubrication pump, improve the user's operating experience, and provide important reference for the maintenance of the engineering vehicle.

[0129] Figure 8 This is a schematic flowchart illustrating an example of the lubrication control method provided in this application. Please refer to... Figure 8 The method includes:

[0130] S801, Control the lubrication pump to start running and record the ambient temperature.

[0131] S802, the timer starts working and records the working time of the lubrication pump.

[0132] Specifically, when the controller starts the lubrication pump, the operating time of the lubrication pump can be timed using an internal timer.

[0133] S803, Read pressure sensor data.

[0134] The pressure sensor data includes the lubrication pump outlet pressure (first pressure) detected by the first pressure sensor, and the main pipeline end pressure (second pressure) detected by the second pressure sensor.

[0135] S804. Determine if the pressure sensor data is abnormal.

[0136] Specifically, if the controller determines that the pressure sensor data is normal, it can proceed to step S805; conversely, if the controller determines that the pressure sensor data is abnormal, it can proceed to step S807.

[0137] Normal pressure sensor data includes both the lubrication pump outlet pressure and the main pipeline end pressure being within the preset normal operating pressure range. Abnormal pressure sensor data can refer to any one or both of the lubrication pump outlet pressure and the main pipeline end pressure being outside the preset normal operating pressure range.

[0138] S805. Determine whether the pressure at the end of the main pipeline has reached the first preset pressure.

[0139] Specifically, step S806 can be executed if the pressure at the end of the main pipeline is greater than or equal to the first preset pressure; conversely, step S803 can be executed if the pressure at the end of the main pipeline is less than the first preset pressure.

[0140] S806. Control the lubrication pump to stop running, record the running data and store it.

[0141] The operational data includes the running time of the lubrication pump recorded by the timer, as well as the ambient temperature.

[0142] In one possible design, multiple operational data can be stored in a database, each of which may include an ambient temperature and the duration of the lubrication pump's working cycle at that ambient temperature.

[0143] Furthermore, the host computer's communication unit can send a database containing multiple operational data sets to the manufacturer for big data analysis. In one specific implementation, this operational data can be written into the memory of newly manufactured engineering vehicles as pre-stored data at the factory, so that in the event of a pressure sensor failure, there is complete data to support operation, independent of the data accumulated by a single machine.

[0144] S807, Read the running time of the lubrication pump.

[0145] S808. Based on the pre-set mapping relationship between ambient temperature and lubrication pump running time, determine the expected running time corresponding to the current ambient temperature.

[0146] S809. Based on the expected running time and the running time already completed, determine the target running time. While the timer continues to record the target running time of the lubrication pump, control the lubrication pump to stop working.

[0147] The target runtime is the duration of operation required for the lubrication pump to complete its working cycle.

[0148] S810, pause, awaiting the next work cycle.

[0149] Specifically, the lubrication pump can automatically enter a rest state after the end of this working cycle, ready for the next working cycle.

[0150] In one specific implementation, the lubrication system operates in Mode 1 when functioning normally. Once the controller detects a pressure sensor malfunction, it automatically switches to Mode 2 and issues a fault alarm. Mode 1 is the normal mode, relying on real-time pressure sensor data to control the start and stop of the lubrication pump using dynamic pressure thresholds, with the pressure at the end of the main pipeline reaching the target pressure as the termination condition for the work cycle. Mode 2 is the abnormal mode; when a pressure sensor malfunction is detected, its control logic relies on a pre-stored mapping relationship between ambient temperature and the expected operating time of the lubrication pump. By calculating the target operating time, it controls the lubrication pump to continue running for that target time before stopping, thus terminating the work cycle.

[0151] The lubrication control method examples provided in this application are similar in their implementation process to the technical solutions shown in the above method embodiments, and their implementation principles and beneficial effects are similar, so they will not be repeated here.

[0152] Figure 9 This is a schematic diagram of the controller provided in an embodiment of this application. Please refer to... Figure 9 The controller 90 may include a processor 91, a memory 92, and an interface 93.

[0153] The memory 92 is used to store computer-executed instructions;

[0154] The processor 91 executes the computer execution instructions stored in the memory 92, causing the processor 91 to perform the lubrication control method as shown in the above method embodiment.

[0155] The interactive interface 93 is used for communication and data exchange with other devices. For example, a first pressure sensor and a second pressure sensor can be connected through the interactive interface. The interactive interface can also be referred to as an input / output interface or an I / O interface.

[0156] In the controller 90 described above, the processor 91, memory 92, and interaction interface 93 are electrically connected directly or indirectly to enable data transmission or interaction. For example, these components can be electrically connected to each other via one or more communication buses or signal lines, such as via bus 94.

[0157] It should be noted that the aforementioned memory can be system memory used to store computer-executed instructions, including read-only memory (ROM), random access memory (RAM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), etc.; optionally, the controller 90 may also include user memory for storing operating data, and the user memory may include random access memory, non-volatile memory (NVM), etc.

[0158] This application also provides an engineering vehicle, including an engineering vehicle body; and Figure 2 The lubrication system shown, or, Figure 9 The controller shown is used to implement the lubrication control method described in the above embodiments.

[0159] The engineering vehicles provided in this application include, but are not limited to, the following types of work vehicles: excavators, bulldozers, loaders, road rollers, and concrete pump trucks.

[0160] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the lubrication control method described in the above method embodiments.

[0161] This application also provides a computer program product, including a computer program that, when executed by a processor, is used to implement the lubrication control method described in the above-described method embodiments.

[0162] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0163] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0164] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0165] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A lubrication system, characterized in that, include: A controller, and a lubrication pump, a first pressure sensor, and a second pressure sensor respectively connected to the controller; The lubrication pump is used to pump lubricant from a storage device into at least one injector via a main pipeline; The first pressure sensor is disposed on the main pipeline and located between the lubrication pump and at least one oil injector, for detecting the outlet pressure of the lubrication pump; The second pressure sensor is disposed at the end of the main pipeline and is used to detect the pressure at the end of the main pipeline; The controller is used to determine whether to end the working cycle of the lubrication pump based on the pressure detected by the second pressure sensor.

2. The lubrication system according to claim 1, characterized in that, The lubrication system further includes a temperature sensor connected to the controller for detecting ambient temperature; The controller is also used to control the operating status of the lubrication pump according to the ambient temperature.

3. A lubrication control method, characterized in that, The method, applied to a controller in the lubrication system of claim 1 or 2, comprises: During the operation of the lubrication pump, a first pressure at the outlet of the lubrication pump and a second pressure at the end of the main pipeline that delivers lubricant to at least one injector are obtained; The working cycle of the lubrication pump is controlled based on the first pressure and the second pressure.

4. The lubrication control method according to claim 3, characterized in that, The step of controlling the working cycle of the lubrication pump based on the first pressure and the second pressure includes: If the first pressure reaches the second preset pressure before the second pressure reaches the first preset pressure, the lubrication pump is controlled to stop working, and the new first pressure at the outlet of the lubrication pump is obtained in real time. If the new first pressure drops to the third preset pressure, the lubrication pump is controlled to start working; Repeat the above steps until the second pressure reaches the first preset pressure, then control the lubrication pump to stop working; Wherein, the second preset pressure is greater than the third preset pressure, and the third preset pressure is greater than the first preset pressure.

5. The lubrication control method according to claim 3 or 4, characterized in that, The method further includes: If a pressure sensor malfunction is detected, the running time of the lubrication pump is obtained. The pressure sensor includes a first pressure sensor installed at the outlet of the lubrication pump and a second pressure sensor installed at the end of the main pipeline. Get the current ambient temperature; Based on the pre-set mapping relationship between ambient temperature and lubrication pump running time, the expected running time corresponding to the current ambient temperature is determined; Based on the expected runtime and the runtime already completed, the lubrication pump is controlled to stop operating.

6. The lubrication control method according to claim 5, characterized in that, The step of controlling the lubrication pump to stop working based on the expected running time and the already run time includes: The difference between the expected runtime and the runtime already completed is determined as the target runtime. After the target running time has elapsed, the lubrication pump is controlled to continue operating, and then stopped.

7. The lubrication control method according to claim 5, characterized in that, The method further includes: During the operation of the lubrication system, the running time of the lubrication pump when the pressure at the end of the main pipeline reaches the first preset pressure is obtained under different ambient temperatures; The mapping relationship is established based on multiple ambient temperatures and the running time of the lubrication pump corresponding to each ambient temperature.

8. The lubrication control method according to claim 6 or 7, characterized in that, The method further includes: When a pressure sensor malfunction is detected, a malfunction alarm message is sent through the alarm device; And / or, The current ambient temperature and the operating time of the lubrication pump are displayed in the visualization interface.

9. A controller, characterized in that, include: Memory, processor, and interface; The memory is used to store computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the processor to perform the lubrication control method as described in any one of claims 3-8.

10. An engineering vehicle, characterized in that, include: Main body of the engineering vehicle; And, the lubrication system as claimed in claim 1 or 2, or the controller as claimed in claim 9.

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