Hydraulic oil preheating method and system, and engineering machine

Abstract

The application relates to the technical field of engineering machinery, in particular to a hydraulic oil preheating method and system and engineering machinery. The method comprises the following steps: acquiring the hydraulic oil temperature of hydraulic oil in a hydraulic system; and adjusting one or more parameters in hydraulic oil pressure, oil pump displacement and engine speed of the hydraulic system until the hydraulic oil temperature rises to a working temperature range, when the hydraulic oil temperature is lower than a preset oil temperature. When the hydraulic oil temperature is lower than the preset oil temperature, the hydraulic oil is in a poor condition and cannot work, and needs to be preheated in time. One or more parameters in the hydraulic oil pressure, oil pump displacement and engine speed are selected for adjustment and increase, so that the hydraulic oil obtains sufficient internal energy. In this aspect, an additional heater is not needed, and the internal energy in the hydraulic system is converted into heat energy to preheat the hydraulic oil, so that the preheating of the hydraulic oil is realized at a lower cost.

Description

Technical Field

[0001] This application relates to the field of engineering machinery technology, specifically to hydraulic oil preheating methods and systems, and engineering machinery. Background Technology

[0002] When starting up wheeled cranes and other types of construction machinery in low temperatures during winter, the hydraulic oil itself has poor low-temperature fluidity and evaporability, which causes wax precipitation in the hydraulic oil, resulting in slow response of the machine.

[0003] One current solution is to use different grades of hydraulic oil depending on temperature changes, i.e., using high-grade hydraulic oil in cold seasons. However, compared to low-grade hydraulic oil, high-grade hydraulic oil has lower durability and is more expensive, significantly increasing operating costs. In this solution, operators cannot respond accurately to temperature changes in a timely manner, and high- and low-grade hydraulic oils are often mixed, resulting in incomplete hydraulic oil atomization and causing many defects in active operation.

[0004] Another solution is to add an additional heating device to the hydraulic system to heat the hydraulic oil. However, this solution has low heating efficiency and increases costs.

[0005] In summary, current hydraulic oil heating solutions suffer from high cost and low efficiency. How to achieve hydraulic oil preheating in construction machinery at a lower cost and higher efficiency is a technical problem that needs to be solved in this field. Summary of the Invention

[0006] In view of this, this application provides a hydraulic oil preheating method that can achieve hydraulic oil preheating at a lower cost and with higher efficiency.

[0007] In a first aspect, this application provides a method for preheating hydraulic oil, comprising: acquiring the hydraulic oil temperature in a hydraulic system; and adjusting one or more parameters of the hydraulic oil pressure, pump displacement, and engine speed in the hydraulic system, based on the fact that the hydraulic oil temperature is lower than a preset oil temperature, until the hydraulic oil temperature rises to the operating temperature range.

[0008] In this invention, the oil pump is one or more electrically controlled pumps in the hydraulic system, used to provide flow power for the hydraulic oil in the hydraulic system. When the hydraulic oil temperature is lower than the preset oil temperature, it indicates that the hydraulic oil is in poor condition and cannot be put into operation, requiring timely preheating. One or more parameters, such as hydraulic oil pressure, oil pump displacement, and engine speed, are adjusted and increased to allow the hydraulic oil to acquire sufficient internal energy. This invention eliminates the need for an additional heater, instead converting the internal energy of the hydraulic system into heat energy to preheat the hydraulic oil, achieving hydraulic oil preheating at a lower cost.

[0009] In conjunction with the first aspect, in one possible implementation, adjusting one or more parameters of the hydraulic system—hydraulic oil pressure, pump displacement, and engine speed—based on the hydraulic oil temperature being lower than a preset oil temperature, until the hydraulic oil temperature rises to the operating temperature range includes: when the hydraulic oil temperature meets a first preset temperature range, controlling the hydraulic system's hydraulic oil pressure to increase and maintain at a preset oil pressure, controlling the pump displacement to increase and maintain at a second preset displacement, and controlling the engine speed to rise to a target speed according to three sequentially increasing speed gradients; when the hydraulic oil temperature meets a second preset temperature range, controlling the hydraulic oil pressure to maintain at the preset oil pressure, controlling the displacement to increase and maintain at the second preset displacement, and controlling the engine speed to rise to the target speed according to two sequentially increasing speed gradients; and when the hydraulic oil temperature meets a third preset temperature range, controlling the hydraulic oil pressure to maintain at the preset oil pressure, controlling the displacement to maintain at the second preset displacement, and controlling the engine speed to maintain at the target speed; wherein, the minimum value of the third preset temperature range is greater than the maximum value of the second preset temperature range, and the minimum value of the second preset temperature range is greater than the maximum value of the first preset temperature range.

[0010] In conjunction with the first aspect, in one possible implementation, the step of controlling the hydraulic system to increase and maintain the hydraulic oil pressure at a preset oil pressure, controlling the oil pump displacement to increase and maintain a second preset displacement, and controlling the engine speed to rise to the target speed according to three sequentially increasing speed gradients during a first time period includes: controlling the hydraulic oil pressure to linearly increase to the preset oil pressure, controlling the displacement to linearly increase to the first preset displacement, and controlling the engine speed to maintain a first speed value during a second time period; controlling the hydraulic oil pressure to maintain the preset oil pressure, controlling the displacement to linearly increase from the first preset displacement to the second preset displacement, and controlling the engine speed to maintain a second speed value during a third time period; and controlling the hydraulic oil pressure to maintain the preset oil pressure, controlling the displacement to maintain the second preset displacement, and controlling the engine speed to maintain a third speed value during a third time period; wherein the third speed value is greater than the second speed value, and the second speed value is greater than the first speed value.

[0011] In conjunction with the first aspect, in one possible implementation, the step of controlling the hydraulic oil pressure to remain at the preset oil pressure when the hydraulic oil temperature meets the second preset temperature range, controlling the displacement to remain at the second preset displacement after an increase, and controlling the engine speed to rise to the target speed according to two sequentially increasing speed gradients includes: during a second time period, controlling the hydraulic oil pressure to remain at the preset oil pressure, controlling the displacement to linearly increase from the first preset displacement to the second preset displacement, and controlling the engine speed to remain at a second speed value; and during a third time period, controlling the hydraulic oil pressure to remain at the preset oil pressure, controlling the displacement to remain at the second preset displacement, and controlling the engine speed to remain at a third speed value; wherein the third speed value is greater than the second speed value.

[0012] In conjunction with the first aspect, in one possible implementation, the step of controlling the hydraulic oil pressure to remain at the preset oil pressure, controlling the displacement to remain at the second preset displacement, and controlling the engine speed to remain at the target speed when the hydraulic oil temperature meets the third preset temperature range includes: controlling the hydraulic oil pressure to remain at the preset oil pressure, controlling the displacement to remain at the second preset displacement, and controlling the engine speed to remain at the third speed value within a third time period.

[0013] In conjunction with the first aspect, in one possible implementation, obtaining the hydraulic oil temperature in the hydraulic system includes: obtaining a temperature sampling value detected by a temperature sensor in the hydraulic system; and obtaining the hydraulic oil temperature based on the temperature sampling value.

[0014] In conjunction with the first aspect, in one possible implementation, after obtaining the hydraulic oil temperature in the hydraulic system, the method further includes: generating a heating reminder message when the hydraulic oil temperature meets the first preset temperature range, the second preset temperature range, or the third preset temperature range; and receiving heating confirmation information input by the user based on the heating reminder message.

[0015] In conjunction with the first aspect, one possible implementation also includes: stopping the execution of the hydraulic oil preheating method when a user inputs a heating stop message.

[0016] Secondly, this application provides a hydraulic oil preheating system, including: an oil temperature acquisition module configured to acquire the hydraulic oil temperature of the hydraulic oil in the hydraulic system; and a preheating control module communicatively connected to the oil temperature acquisition module, wherein the preheating control module is configured to adjust one or more parameters of the hydraulic oil pressure, the oil pump displacement, and the engine speed of the hydraulic system according to the hydraulic oil temperature being lower than a preset oil temperature, until the hydraulic oil temperature rises to the working temperature range.

[0017] The second aspect is the system corresponding to the first aspect, and the technical effects of the second aspect will not be elaborated here. Thirdly, this application provides an engineering machinery, including: an engineering machinery body; a hydraulic system disposed on the engineering machinery body; and the aforementioned hydraulic oil preheating system, wherein the hydraulic oil preheating system is electrically connected to the hydraulic system.

[0018] The third aspect includes the system of the second aspect, and the technical effects of the third aspect will not be elaborated here. Attached Figure Description

[0019] Figure 1 The diagram shown is a schematic representation of the steps of a hydraulic oil preheating method according to an embodiment of this application.

[0020] Figure 2 The diagram shown is a schematic representation of the steps of a hydraulic oil preheating method according to another embodiment of this application.

[0021] Figure 3 The diagram shown is a schematic representation of the steps of a hydraulic oil preheating method according to another embodiment of this application.

[0022] Figure 4 The diagram shown is a schematic representation of the steps of a hydraulic oil preheating method according to another embodiment of this application.

[0023] Figure 5 The diagram shown is a schematic representation of the steps of a hydraulic oil preheating method according to another embodiment of this application.

[0024] Figure 6 The diagram shown is a schematic representation of the steps of a hydraulic oil preheating method according to another embodiment of this application.

[0025] Figure 7 The diagram shown is a schematic representation of the steps of a hydraulic oil preheating method according to another embodiment of this application.

[0026] Figure 8 The diagram shown is a schematic representation of the steps of a hydraulic oil preheating method according to another embodiment of this application.

[0027] Figure 9 The diagram shown is a schematic diagram of a hydraulic oil preheating process according to this application.

[0028] Figure 10 The figure shown is a schematic diagram of the system structure of a hydraulic oil preheating system provided in an embodiment of this application.

[0029] Figure 11 The diagram shown is a partial system structure diagram of an engineering machinery provided in an embodiment of this application.

[0030] Figure 12The diagram shown is a structural schematic of an electronic device provided in an embodiment of this application. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0032] An exemplary method for preheating hydraulic oil is as follows:

[0033] Figure 1 The diagram shown is a schematic representation of the steps in a hydraulic oil preheating method according to an embodiment of this application. This application provides a hydraulic oil preheating method, such as... Figure 1 As shown, the hydraulic oil preheating method includes:

[0034] Step 110: Obtain the hydraulic oil temperature in the hydraulic system.

[0035] Step 120: If the hydraulic oil temperature is lower than the preset oil temperature, adjust one or more parameters of the hydraulic system, such as hydraulic oil pressure, oil pump displacement, and engine speed, until the hydraulic oil temperature rises to the working temperature range.

[0036] In this embodiment, the oil pump is one or more electrically controlled pumps in the hydraulic system, used to provide flow power for the hydraulic oil in the hydraulic system. When the hydraulic oil temperature is lower than the preset oil temperature, it indicates that the hydraulic oil is in poor condition and cannot be put into operation, requiring timely preheating. One or more parameters are selected and increased from the hydraulic oil pressure, oil pump displacement, and engine speed, thereby allowing the hydraulic oil to acquire sufficient internal energy. This embodiment does not require an additional heater; instead, it converts the internal energy of the hydraulic system into heat energy to preheat the hydraulic oil, achieving hydraulic oil preheating at a lower cost.

[0037] Figure 2 The diagram shown is a schematic representation of the steps in a hydraulic oil preheating method according to an embodiment of this application. This application provides a hydraulic oil preheating method, such as... Figure 2 As shown, step 120 includes:

[0038] Step 121: When the hydraulic oil temperature meets the first preset temperature range, control the hydraulic oil pressure of the hydraulic system to increase and maintain it at the preset oil pressure, control the oil pump displacement to increase and maintain it at the second preset displacement, and control the engine speed to increase to the target speed according to the three sequentially increasing speed gradients.

[0039] Step 122: When the hydraulic oil temperature meets the second preset temperature range, control the hydraulic oil pressure to maintain the preset oil pressure, control the displacement to maintain the second preset displacement after the displacement increases, and control the engine speed to increase to the target speed according to the two sequentially increasing speed gradients.

[0040] Step 123: When the hydraulic oil temperature meets the third preset temperature range, control the hydraulic oil pressure to maintain the preset oil pressure, control the displacement to maintain the second preset displacement, and control the engine speed to maintain the target speed.

[0041] In this embodiment, the minimum value of the third preset temperature range is greater than the maximum value of the second preset temperature range, and the minimum value of the second preset temperature range is greater than the maximum value of the first preset temperature range. The oil pump is one or more electrically controlled pumps in the hydraulic system, used to provide flow power for the hydraulic oil in the hydraulic system. When the hydraulic oil temperature is low and meets the first preset temperature range, the hydraulic oil pressure, oil pump displacement, and engine speed are gradually increased to allow the hydraulic oil to acquire sufficient internal energy. When the hydraulic oil temperature is high and meets the second preset temperature range, the oil pump displacement and engine speed are gradually increased to allow the hydraulic oil to acquire greater internal energy. When the hydraulic oil temperature is even higher and meets the third preset temperature range, less internal energy is needed; simply increasing the oil pump displacement is sufficient. This embodiment implements different preheating processes based on different hydraulic oil temperatures, and corresponding preheating measures are taken for different temperature ranges to achieve higher preheating efficiency.

[0042] Figure 3 The diagram shown illustrates the steps of a hydraulic oil preheating method according to another embodiment of this application. In one embodiment, as... Figure 3 As shown, step 121 includes:

[0043] Step 1211: During the first time period, control the hydraulic oil pressure to increase linearly to the preset oil pressure, control the displacement to increase linearly to the first preset displacement, and control the engine speed to remain at the first speed value.

[0044] In this step, the hydraulic oil pressure increases linearly from P1 to the preset oil pressure P2 over time, and the oil pump displacement increases linearly from Q1 to the first preset displacement Q2 over time.

[0045] Step 1212: During the second time period, control the hydraulic oil pressure to remain at the preset oil pressure, control the displacement to increase linearly from the first preset displacement to the second preset displacement, and control the engine speed to remain at the second speed value.

[0046] In this step, the oil pump displacement increases linearly from the first preset displacement Q2 to the second preset displacement Q3 over time.

[0047] Step 1213: During the third time period, control the hydraulic oil pressure to maintain the preset oil pressure, control the displacement to maintain the second preset displacement, and control the engine speed to maintain the third speed value.

[0048] In this embodiment, the third speed value is greater than the second speed value, and the second speed value is greater than the first speed value. This embodiment divides step 121 into three processes, performing corresponding operations within different time periods. The first, second, and third time periods can be any value between 5 and 10 minutes, and this embodiment executes them sequentially in the order of the first, second, and third time periods. The engine speed remains at different values ​​within each time period. Dividing step 121 into three separate processes allows for more convenient and accurate control of the entire preheating process.

[0049] Figure 4 The diagram shown illustrates the steps of a hydraulic oil preheating method according to another embodiment of this application. In one embodiment, as... Figure 4 As shown, step 122 includes:

[0050] Step 1221: During the second time period, control the hydraulic oil pressure to remain at the preset oil pressure, control the displacement to increase linearly from the first preset displacement to the second preset displacement, and control the engine speed to remain at the second speed value.

[0051] In this step, the oil pump displacement increases linearly from the first preset displacement Q2 to the second preset displacement Q3 over time.

[0052] Step 1222: During the third time period, control the hydraulic oil pressure to maintain the preset oil pressure, control the displacement to maintain the second preset displacement, and control the engine speed to maintain the third speed value.

[0053] In this embodiment, the third rotational speed value is greater than the second rotational speed value. This embodiment divides step 122 into two processes, performing corresponding operations within different time periods. The second and third time periods can be any value between 5 and 10 minutes, and this embodiment executes them sequentially according to the order of the second and third time periods. Dividing step 122 into two separate processes allows for more convenient and accurate control of the entire preheating process.

[0054] Figure 5 The diagram shown illustrates the steps of a hydraulic oil preheating method according to another embodiment of this application. In one embodiment, as... Figure 5 As shown, step 123 includes:

[0055] Step 1231: During the third time period, control the hydraulic oil pressure to maintain the preset oil pressure, control the displacement to maintain the second preset displacement, and control the engine speed to maintain the third speed value.

[0056] In this embodiment, since the third preset temperature is relatively high, it is sufficient to keep the hydraulic oil pressure constant at the preset oil pressure P2, the oil pump displacement constant at the second preset displacement Q3, and the engine speed constant at the third speed value, so that the temperature of the hydraulic oil is easier to control and will not rise too quickly.

[0057] Figure 6 The diagram shown is a schematic representation of the method steps for a hydraulic oil preheating method according to another embodiment of this application. In one embodiment, as... Figure 6 As shown, step 110 includes:

[0058] Step 111: Obtain the temperature sampling value detected by the temperature sensor in the hydraulic system.

[0059] Step 112: Obtain the hydraulic oil temperature based on the temperature sampling value.

[0060] In this embodiment, after the hydraulic oil temperature is calculated based on the temperature sampling value, the hydraulic oil temperature can be sent to the device display screen via the CAN bus for display, so that the user can clearly know the hydraulic oil temperature.

[0061] Figure 7 The diagram shown illustrates the steps of a hydraulic oil preheating method according to another embodiment of this application. In one embodiment, as... Figure 7 As shown, after step 110, the hydraulic oil preheating method further includes:

[0062] Step 150: When the hydraulic oil temperature meets the first preset temperature range, the second preset temperature range, or the third preset temperature range, a heating reminder message is generated.

[0063] Step 160: Receive heating confirmation information entered by the user based on the heating reminder information.

[0064] In this embodiment, the generated heating reminder information can be pushed to the user in a timely manner. After receiving the heating reminder information through the device display screen or smart terminal, the user decides whether to heat the device. If the user decides to heat the device, they enter heating confirmation information. After obtaining the heating confirmation information in step 160, steps 121, 122, and 123 are executed.

[0065] Figure 8 The diagram shown illustrates the steps of a hydraulic oil preheating method according to another embodiment of this application. In one embodiment, as... Figure 8 As shown, the hydraulic oil preheating method further includes:

[0066] Step 170: When a user inputs a heating stop message, the hydraulic oil preheating method is stopped.

[0067] In this embodiment, when the user decides not to heat anymore, the user inputs heating stop information. After obtaining the heating stop information in step 170, the entire hydraulic oil preheating method is terminated, that is, steps 110 and 120 are terminated.

[0068] Figure 9 The diagram shown is a schematic representation of a hydraulic oil preheating process according to this application. Figure 9 As shown, after this application begins execution, the user inputs heating confirmation information, and the hydraulic oil temperature is compared with a first preset temperature range, a second preset temperature range, or a third preset temperature range. If the hydraulic oil temperature meets the first preset temperature range, steps 1211, 1212, and 1213 are executed sequentially, and then the process ends. If the hydraulic oil temperature meets the second preset temperature range, steps 1212 and 1213 are executed sequentially, and then the process ends. If the hydraulic oil temperature meets the third preset temperature range, step 1213 is executed, and then the process ends.

[0069] An example hydraulic oil preheating system is as follows:

[0070] Figure 10 The diagram shown is a schematic representation of a hydraulic oil preheating system according to an embodiment of this application. This application also provides a hydraulic oil preheating system, such as... Figure 10 As shown, the system includes an oil temperature acquisition module 901 and a preheating control module 902.

[0071] The oil temperature acquisition module 901 is configured to acquire the hydraulic oil temperature in the hydraulic system.

[0072] The preheating control module 902 is communicatively connected to the oil temperature acquisition module 901. The preheating control module 902 is configured to adjust one or more parameters of the hydraulic system, such as the hydraulic oil pressure, the oil pump displacement, and the engine speed, based on the fact that the hydraulic oil temperature is lower than the preset oil temperature, until the hydraulic oil temperature rises to the working temperature range.

[0073] like Figure 10 As shown, the hydraulic oil preheating system also includes a heating confirmation module 903, which is communicatively connected to the oil temperature acquisition module 901. The heating confirmation module 903 is configured to: push heating reminder information to the user when the hydraulic oil temperature reaches the heating threshold; and receive heating confirmation information input by the user based on the heating reminder information.

[0074] Examples of construction machinery are as follows:

[0075] This application also provides a construction machinery, which includes a construction machinery body, a hydraulic system and the aforementioned hydraulic oil preheating system. The hydraulic system is installed on the construction machinery body, and the hydraulic oil preheating system is electrically connected to the hydraulic system.

[0076] Figure 11The diagram shown is a partial system structure schematic of an engineering machinery provided in one embodiment of this application. Figure 11 As shown, the construction machinery includes a display screen host computer, a hydraulic oil temperature sensor, a vehicle-mounted controller, an engine, and a pump control valve assembly. The hydraulic oil temperature sensor detects the hydraulic oil temperature. After receiving the hydraulic oil temperature data, the vehicle-mounted controller sends it to the display screen host computer, through which the user sends a heating confirmation message. The vehicle-mounted controller controls the engine speed based on the hydraulic oil temperature, maintaining it at a first, second, or third speed value. The vehicle-mounted controller also controls the pump control valve assembly based on the hydraulic oil temperature, thereby adjusting the hydraulic oil pressure and pump displacement of the hydraulic system.

[0077] Below, for reference Figure 12 This describes an electronic device according to embodiments of the present application. Figure 12 The diagram shown is a structural schematic of an electronic device provided in an embodiment of this application.

[0078] like Figure 12 As shown, the electronic device 1300 includes one or more processors 1301 and memory 1302.

[0079] The processor 1301 may be a central processing unit (CPU) or other form of processing unit with data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device 1300 to perform desired functions.

[0080] The memory 1302 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 1301 may execute the program instructions to implement the hydraulic oil preheating method of the various embodiments of this application described above or other desired functions. Various contents, such as hydraulic oil preheating error parameters, may also be stored in the computer-readable storage medium.

[0081] In one example, the electronic device 1300 may also include an input device 1303 and an output device 1304, which are interconnected via a bus system and / or other forms of connection mechanism (not shown).

[0082] The input device 1303 may include, for example, a keyboard, mouse, joystick, and touch screen.

[0083] The output device 1304 can output various information to the outside, including determined motion data. The output device 1304 may include, for example, a display, a communication network, and a remote output device connected thereto.

[0084] Of course, for the sake of simplicity, Figure 12 Only some of the components of the electronic device 1300 relevant to this application are shown in this illustration; components such as buses, input / output interfaces, etc., are omitted. In addition, the electronic device 1300 may include any other suitable components depending on the specific application.

[0085] In addition to the methods and apparatus described above, embodiments of this application may also be computer program products, which include computer program instructions that, when executed by a processor, cause the processor to perform the steps in the hydraulic oil preheating methods according to various embodiments of this application as described in this specification.

[0086] The computer program product can be written in any combination of one or more programming languages ​​to perform the operations of the embodiments of this application. The programming languages ​​include object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0087] Furthermore, embodiments of this application may also be computer-readable storage media storing computer program instructions thereon, which, when executed by a processor, cause the processor to perform the steps in the hydraulic oil preheating method according to various embodiments of this application.

[0088] The computer-readable storage medium may be any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may, for example, include, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: electrical connections having one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0089] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0090] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0091] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0092] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be carried out within the widest scope consistent with the principles and novel features of the invention herein.

[0093] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications or equivalent substitutions made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for preheating hydraulic oil, characterized in that, include: To obtain the hydraulic oil temperature in the hydraulic system; as well as If the hydraulic oil temperature is lower than the preset oil temperature, adjust one or more parameters of the hydraulic system, such as the hydraulic oil pressure, the oil pump displacement, and the engine speed, until the hydraulic oil temperature rises to the operating temperature range. These include: when the hydraulic oil temperature meets the first preset temperature range, controlling the hydraulic oil pressure of the hydraulic system to increase and then maintain it at the preset oil pressure, controlling the oil pump displacement to increase and then maintain it at the second preset displacement, and controlling the engine speed to increase to the target speed according to three sequentially increasing speed gradients; When the hydraulic oil temperature meets the second preset temperature range, the hydraulic oil pressure is controlled to remain at the preset oil pressure; the displacement is controlled to remain at the second preset displacement after increasing; and the engine speed is controlled to increase to the target speed according to two sequentially increasing speed gradients. When the hydraulic oil temperature meets the third preset temperature range, the hydraulic oil pressure is controlled to be maintained at the preset oil pressure, the displacement is controlled to be maintained at the second preset displacement, and the engine speed is controlled to be maintained at the target speed; Wherein, the minimum value of the third preset temperature range is greater than the maximum value of the second preset temperature range, and the minimum value of the second preset temperature range is greater than the maximum value of the first preset temperature range; The method, after obtaining the hydraulic oil temperature in the hydraulic system, further includes: generating a heating reminder message when the hydraulic oil temperature meets the first preset temperature range, the second preset temperature range, or the third preset temperature range; and Receive heating confirmation information input by the user based on the heating reminder information.

2. The hydraulic oil preheating method according to claim 1, characterized in that, When the hydraulic oil temperature meets the first preset temperature range, controlling the hydraulic oil pressure of the hydraulic system to increase and maintain it at the preset oil pressure, controlling the oil pump displacement to increase and maintain it at the second preset displacement, and controlling the engine speed to increase to the target speed according to three sequentially increasing speed gradients include: During the first time period, the hydraulic oil pressure is controlled to increase linearly to the preset oil pressure, the displacement is controlled to increase linearly to the first preset displacement, and the engine speed is controlled to remain at the first speed value. During the second time period, the hydraulic oil pressure is controlled to remain at the preset oil pressure, the displacement is controlled to increase linearly from the first preset displacement to the second preset displacement, and the engine speed is controlled to remain at the second speed value; and During the third time period, the hydraulic oil pressure is controlled to remain at the preset oil pressure, the displacement is controlled to remain at the second preset displacement, and the engine speed is controlled to remain at the third speed value; Wherein, the third rotational speed value is greater than the second rotational speed value, and the second rotational speed value is greater than the first rotational speed value.

3. The hydraulic oil preheating method according to claim 1, characterized in that, The steps of controlling the hydraulic oil pressure to remain at the preset oil pressure when the hydraulic oil temperature meets the second preset temperature range, controlling the displacement to remain at the second preset displacement after the displacement increases, and controlling the engine speed to rise to the target speed according to two sequentially increasing speed gradients include: During the second time period, the hydraulic oil pressure is controlled to remain at the preset oil pressure, the displacement is controlled to increase linearly from the first preset displacement to the second preset displacement, and the engine speed is controlled to remain at the second speed value; and During the third time period, the hydraulic oil pressure is controlled to remain at the preset oil pressure, the displacement is controlled to remain at the second preset displacement, and the engine speed is controlled to remain at the third speed value; The third rotational speed value is greater than the second rotational speed value.

4. The hydraulic oil preheating method according to claim 1, characterized in that, The steps of controlling the hydraulic oil pressure to remain at the preset oil pressure, controlling the displacement to remain at the second preset displacement, and controlling the engine speed to remain at the target speed when the hydraulic oil temperature meets the third preset temperature range include: During the third time period, the hydraulic oil pressure is controlled to remain at the preset oil pressure, the displacement is controlled to remain at the second preset displacement, and the engine speed is controlled to remain at the third speed value.

5. The hydraulic oil preheating method according to claim 1, characterized in that, The method of obtaining the hydraulic oil temperature in the hydraulic system includes: Obtain the temperature sampling value detected by the temperature sensor in the hydraulic system; and The hydraulic oil temperature is obtained based on the temperature sampling value.

6. A method for preheating hydraulic oil according to any one of claims 1 to 5, characterized in that, Also includes: When a user inputs a heating stop message, the hydraulic oil preheating method is stopped.

7. A hydraulic oil preheating system, characterized in that, include: The oil temperature acquisition module is configured to acquire the hydraulic oil temperature in the hydraulic system. The preheating control module is communicatively connected to the oil temperature acquisition module. The preheating control module is configured to: adjust one or more parameters of the hydraulic system, such as hydraulic oil pressure, oil pump displacement, and engine speed, based on the fact that the hydraulic oil temperature is lower than the preset oil temperature, until the hydraulic oil temperature rises to the working temperature range. This includes: when the hydraulic oil temperature meets a first preset temperature range, controlling the hydraulic oil pressure of the hydraulic system to increase and maintain a preset oil pressure, controlling the oil pump displacement to increase and maintain a second preset displacement, and controlling the engine speed to increase to a target speed according to three sequentially increasing speed gradients; when the hydraulic oil temperature meets a second preset temperature range, controlling the hydraulic oil pressure to maintain the preset oil pressure, controlling the displacement to increase and maintain the second preset displacement, and controlling the engine speed to increase to the target speed according to two sequentially increasing speed gradients; and when the hydraulic oil temperature meets a third preset temperature range, controlling the hydraulic oil pressure to maintain the preset oil pressure, controlling the displacement to maintain the second preset displacement, and controlling the engine speed to maintain the target speed; wherein the minimum value of the third preset temperature range is greater than the maximum value of the second preset temperature range, and the minimum value of the second preset temperature range is greater than the maximum value of the first preset temperature range; wherein, after obtaining the hydraulic oil temperature of the hydraulic system, the method further includes: generating a heating reminder message when the hydraulic oil temperature meets the first, second, or third preset temperature range; and receiving heating confirmation information input by the user based on the heating reminder message.

8. An engineering machinery, characterized in that, include: Construction machinery body; The hydraulic system is installed on the main body of the engineering machinery; as well as The hydraulic oil preheating system as described in claim 7 is electrically connected to the hydraulic system.

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