A power shift tractor thermal management control method, system, device, and medium

Abstract

The application discloses a power shift tractor thermal management control method, system, device and medium, and the method comprises the following steps: acquiring the hydraulic oil temperature and the coolant temperature of the power shift tractor; when the hydraulic oil temperature is lower than a first preset threshold, controlling the first wind curtain on the air inlet side of the hydraulic oil radiator to be fully opened; when the hydraulic oil temperature is higher than a second preset threshold, controlling the first wind curtain to be fully closed; when the coolant temperature is higher than a third preset threshold, controlling the second wind curtain on the air inlet side of the coolant radiator to be fully closed; when the hydraulic oil temperature is between the first preset threshold and the second preset threshold, and the coolant temperature is lower than the third preset threshold, the fixed total cooling air volume provided by the fan connected with the engine is proportionally distributed to the hydraulic oil radiator and the coolant radiator according to the opening degrees of the first wind curtain and the second wind curtain. The application can realize differentiated and accurate thermal management of the coolant and the hydraulic oil of the power shift tractor.

Description

Technical Field

[0001] This invention relates to the field of thermal management technology for agricultural machinery, and in particular to a thermal management control method, system, device, and medium for a power shift tractor. Background Technology

[0002] Currently, power shift tractors require increased hydraulic oil temperature to improve transmission efficiency at low temperatures. However, existing thermal management systems typically employ independently arranged side-by-side coolant and hydraulic oil radiators, forming a cooling package, which is then cooled by a fan rigidly connected to the engine with a fixed speed ratio. The cooling airflow of this thermal management system only varies with engine speed and cannot be independently controlled, leading to the following challenges in thermal management: 1) The thermal management system mainly includes the engine, independent and side-by-side coolant radiators and hydraulic oil radiators, a fan that is rigidly connected to the engine and has no speed adjustment, and a thermostat in the coolant circuit. The windward side of both radiators is fully exposed.

[0003] 2) During the low-temperature start-up phase, as the engine speed increases, the rigid fan speed also increases synchronously, generating a powerful and unadjustable cooling airflow that continuously blows on the two radiators. This airflow causes excessive cooling of the hydraulic oil, which is already at a low temperature, causing the limited heat generated by the hydraulic oil itself to be carried away instantly, resulting in an extremely slow preheating process or even failure to start.

[0004] 3) Under high-temperature conditions, when the engine is running at low speed and under heavy load (such as heavy-load climbing), the fan speed will decrease accordingly and the air volume will be insufficient. Even if the heat dissipation surfaces of the two radiators are fully exposed, they cannot provide sufficient heat dissipation capacity, which can easily cause the hydraulic oil and coolant to overheat.

[0005] 4) The thermal management system lacks effective means to actively adjust the heat dissipation intensity and is completely subject to engine speed and external environment, making it impossible to carry out differentiated and refined thermal management of coolant and hydraulic oil.

[0006] In summary, the main shortcomings of existing thermal management systems for power shift tractors are: excessive heat dissipation capacity during low-temperature start-up and warm-up phases, with fixed fully open cooling surfaces and uncontrollable large airflow severely hindering temperature rise; insufficient heat dissipation capacity under high-speed and heavy-load conditions, with fixed fan speed ratios unable to provide sufficient airflow at low engine speeds; and the inability to actively and intelligently adjust the heat dissipation intensity throughout the entire operation process, resulting in uncontrolled thermal management.

[0007] Therefore, there is an urgent need to provide a technical solution to address the above problems. Summary of the Invention

[0008] To address the aforementioned technical problems, this invention provides a thermal management control method, system, device, and medium for power shift tractors.

[0009] In a first aspect, the present invention provides a thermal management control method for a power shift tractor, the technical solution of which is as follows: Obtain the current hydraulic oil temperature and current coolant temperature of the power shift tractor; When the current hydraulic oil temperature is lower than the first preset threshold, the first windproof curtain located on the air intake side of the hydraulic oil radiator of the power shift tractor is fully opened. When the current hydraulic oil temperature is higher than the second preset threshold, the first windshield is controlled to be completely closed; when the current coolant temperature is higher than the third preset threshold, the second windshield located on the air intake side of the coolant radiator of the power shift tractor is controlled to be completely closed. When the current hydraulic oil temperature is between the first preset threshold and the second preset threshold, and the current coolant temperature is lower than the third preset threshold, based on the current hydraulic oil temperature and the current coolant temperature, by controlling the opening of the first windproof curtain and the second windproof curtain respectively, the fixed total cooling air volume provided by the fan connected to the engine of the power shift tractor is distributed to the hydraulic oil radiator and the coolant radiator according to the required proportion.

[0010] The beneficial effects of the thermal management control method for a power shift tractor of the present invention are as follows: The method of this invention monitors the temperature of hydraulic oil and coolant in real time and dynamically distributes the fixed total cooling airflow of the engine fan using a windproof curtain. At low temperatures, it reduces the heat dissipation of hydraulic oil to avoid excessive cooling, and at high temperatures, it increases the heat dissipation to prevent overheating. This solves the problem of excessive heat dissipation at low temperatures and insufficient heat dissipation at high temperatures caused by the coupling of fan speed and engine in traditional systems, and achieves differentiated and precise thermal management of coolant and hydraulic oil in power shift tractors.

[0011] Based on the above solution, the thermal management control method for a power shift tractor of the present invention can be further improved as follows.

[0012] In one alternative approach, the step of obtaining the current hydraulic oil temperature and the current coolant temperature of the power shift tractor includes: The current hydraulic oil temperature is obtained in real time by a hydraulic oil temperature sensor installed in the hydraulic circuit of the power shift tractor. The current coolant temperature is obtained in real time by a coolant temperature sensor installed in the coolant circuit of the power shift tractor.

[0013] The advantages of adopting the above-mentioned optional methods are: by further setting temperature sensors in the hydraulic circuit and coolant circuit to obtain temperature data in real time, the accuracy and response speed of temperature monitoring are improved, providing a reliable foundation for subsequent precise control.

[0014] In one alternative approach, the step of fully opening the first windshield, which is controlled on the air intake side of the hydraulic oil radiator of the power shift tractor, includes: A first control command is generated, and a first drive mechanism connected to the first windproof curtain is driven according to the first control command to move the first windproof curtain to a fully open position.

[0015] The beneficial effects of adopting the above-mentioned optional method are as follows: by generating a first control command and driving the first drive mechanism, the air inlet side curtain of the hydraulic oil radiator can be fully opened and controlled, ensuring that the cooling airflow is effectively blocked during the low temperature preheating stage.

[0016] In one alternative approach, the step of controlling the first windproof curtain to close completely includes: A second control command is generated, and the first drive mechanism is driven according to the second control command to move the first windshield to a fully closed position through the first drive mechanism; The step of completely closing the second windshield, which is controlled by the cooling radiator air intake side of the power shift tractor, includes: A third control command is generated, and a second drive mechanism connected to the second windshield is driven according to the third control command to move the second windshield to a fully closed position.

[0017] The advantages of adopting the above-mentioned optional method are as follows: by generating second and third control commands, the first and second drive mechanisms are driven respectively, so as to realize the independent closing control of the two windproof curtains and meet the differentiated needs of high temperature heat dissipation and low temperature preheating.

[0018] In an alternative embodiment, the step of distributing a fixed total cooling airflow provided by a fan connected to the engine of the power shift tractor to the hydraulic oil radiator and the coolant radiator in a demand proportion by controlling the opening of the first and second windshields respectively, based on the current hydraulic oil temperature and the current coolant temperature, includes: Under the condition of fixed total cooling air volume, the first target opening degree of the first windshield is determined according to the current hydraulic oil temperature, and the second target opening degree of the second windshield is determined according to the current coolant temperature; A first target control command is generated based on the first target opening degree and sent to the first drive mechanism. A second target control command is generated based on the second target opening degree and sent to the second drive mechanism. The first drive mechanism moves the first windshield to the first target opening degree, and the second drive mechanism moves the second windshield to the second target opening degree, thereby completing the proportional distribution of the fixed total cooling air volume between the hydraulic oil radiator and the coolant radiator.

[0019] The advantages of adopting the above-mentioned optional method are: under the condition of fixed total cooling air volume, the target opening degree of the windproof curtain is determined according to the real-time temperature and a corresponding control command is generated, so as to realize the precise distribution of cooling air volume between the two radiators on demand.

[0020] In an alternative approach, the step of determining a first target opening of the first windshield based on the current hydraulic oil temperature and a second target opening of the second windshield based on the current coolant temperature, under the condition of a fixed total cooling airflow, includes: Under the condition of fixed total cooling air volume, a first mapping relationship is established between the first temperature difference between the hydraulic oil temperature and the second preset threshold and the opening degree of the first windshield; wherein, the first mapping relationship maps the first temperature difference to multiple discrete opening degree levels of the first windshield through a first fuzzy control algorithm. Under the condition of fixed total cooling air volume, a second mapping relationship is established between the second temperature difference between the coolant temperature and the third preset threshold and the opening degree of the second windshield; wherein, the second mapping relationship is used by a second fuzzy control algorithm to map the second temperature difference into multiple discrete opening degree levels of the second windshield; The first opening level obtained based on the current hydraulic oil temperature and the first mapping relationship is mapped to the first target opening level, and the second opening level obtained based on the current coolant temperature and the second mapping relationship is mapped to the second target opening level; The first fuzzy control algorithm is configured such that when the first temperature difference is positive, a reduced first opening level is mapped, and when the first temperature difference is negative, an increased first opening level is mapped. The second fuzzy control algorithm is configured such that when the second temperature difference is positive, a reduced second opening level is mapped, and when the second temperature difference is negative, an increased second opening level is mapped.

[0021] The advantages of adopting the above-mentioned optional method are: further using fuzzy control algorithm to establish the mapping relationship between temperature difference and windshield opening, converting continuous temperature signal into discrete opening level, and improving the intelligence and stability of the control process.

[0022] In one alternative approach, it also includes: When the current hydraulic oil temperature is higher than the second preset threshold and the current coolant temperature is higher than the third preset threshold, an engine speed increase command is generated; The engine is controlled to increase its speed according to the engine speed increase command, or a prompt message is output to prompt the user to increase the engine speed according to the engine speed increase command.

[0023] The beneficial effects of adopting the above optional method are: to further generate an engine speed increase command when both hydraulic oil and coolant temperatures exceed the standard, and to enhance the heat dissipation capacity under extreme operating conditions by actively increasing the fan speed or prompting the user to operate.

[0024] Secondly, the present invention provides a thermal management control system for a power shift tractor, the technical solution of which is as follows: The temperature acquisition module is used to obtain the current hydraulic oil temperature and the current coolant temperature of the power shift tractor. The low-temperature preheating module is used to control the first windshield curtain located on the air intake side of the hydraulic oil radiator of the power shift tractor to fully open when the current hydraulic oil temperature is lower than the first preset threshold. A high-temperature heat dissipation module is used to control the first windshield to be completely closed when the current hydraulic oil temperature is higher than a second preset threshold; and to control the second windshield, which is located on the air intake side of the coolant radiator of the power shift tractor, to be completely closed when the current coolant temperature is higher than a third preset threshold. The airflow distribution module is used to distribute the fixed total cooling airflow provided by the fan connected to the engine of the power shift tractor to the hydraulic oil radiator and the coolant radiator according to the required proportion when the current hydraulic oil temperature is between the first preset threshold and the second preset threshold, and the current coolant temperature is lower than the third preset threshold, based on the current hydraulic oil temperature and the current coolant temperature, by controlling the opening of the first windproof curtain and the second windproof curtain respectively.

[0025] The beneficial effects of the power shift tractor thermal management control system of the present invention are as follows: The system of this invention monitors the temperature of hydraulic oil and coolant in real time and dynamically distributes the fixed total cooling airflow of the engine fan using a windproof curtain. At low temperatures, it reduces the heat dissipation of hydraulic oil to avoid overcooling, and at high temperatures, it increases the heat dissipation to prevent overheating. This solves the problem of excessive heat dissipation at low temperatures and insufficient heat dissipation at high temperatures caused by the coupling of fan speed and engine in traditional systems, and achieves differentiated and precise thermal management of coolant and hydraulic oil in power shift tractors.

[0026] Thirdly, the technical solution of an electronic device according to the present invention is as follows: The device includes a processor coupled to a memory storing at least one computer program, which is loaded and executed by the processor to enable the electronic device to implement the power shift tractor thermal management control method of the present invention.

[0027] Fourthly, the technical solution of a computer-readable storage medium provided by the present invention is as follows: The computer-readable storage medium stores at least one computer program, which, when executed by a processor, implements the power shift tractor thermal management control method of the present invention.

[0028] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0029] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a flowchart illustrating an embodiment of the thermal management control method for a power shift tractor according to the present invention. Figure 2 A schematic diagram illustrating the overall architecture and working principle of thermal management control for power shift tractors; Figure 3 A schematic diagram of the overall process of thermal management control for a power shift tractor; Figure 4 This is a schematic diagram of an embodiment of a power shift tractor thermal management control system according to the present invention; Figure 5 This is a schematic diagram of an embodiment of an electronic device according to the present invention. Detailed Implementation

[0030] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0031] Figure 1This diagram illustrates a flowchart of an embodiment of a thermal management control method for a power shift tractor provided by the present invention. This method can be executed by electronic devices such as terminal devices or servers. The terminal device can be any fixed or mobile terminal, such as user equipment (UE), mobile device, user terminal, terminal, cellular phone, cordless phone, personal digital assistant (PDA), handheld device, computing device, vehicle-mounted device, or wearable device. The server can be a single server or a server cluster consisting of multiple servers. Any electronic device can implement the thermal management control method for the power shift tractor by having its processor call computer-readable instructions stored in its memory. Figure 1 As shown, it includes the following steps: S1. Obtain the current hydraulic oil temperature and current coolant temperature of the power shift tractor.

[0032] Among them, a power-shift tractor refers to an agricultural tractor equipped with a power-shift transmission system, capable of smoothly switching between different gears. For example, a tractor used for farmland operations needs to improve transmission efficiency by increasing the hydraulic oil temperature in low-temperature environments. The current hydraulic oil temperature refers to the temperature value of the hydraulic oil in the hydraulic circuit as monitored in real time by a sensor; for example, the hydraulic oil temperature sensor detects a hydraulic oil temperature of 5°C. The current coolant temperature refers to the temperature value of the coolant in the coolant circuit as monitored in real time by a sensor; for example, the coolant temperature sensor detects a coolant temperature of 85°C.

[0033] S2. When the current hydraulic oil temperature is lower than the first preset threshold, the first windproof curtain located on the air intake side of the hydraulic oil radiator of the power shift tractor is fully opened.

[0034] The first preset threshold refers to a lower limit threshold for hydraulic oil temperature, used to trigger a low-temperature preheating mode; for example, if the first preset threshold is set to 40℃, the first windshield will be fully opened when the hydraulic oil temperature is below 40℃. The hydraulic oil radiator refers to a heat exchange device used to cool hydraulic oil, removing heat through airflow; for example, a hydraulic oil radiator placed independently side-by-side in a tractor's cooling system. The air inlet side of the hydraulic oil radiator refers to the side of the hydraulic oil radiator facing the direction of the fan's airflow; for example, the cooling airflow generated by the fan first blows towards the air inlet side of the hydraulic oil radiator. The first windshield refers to a controllable windshielding device installed on the air inlet side of the hydraulic oil radiator, used to regulate the airflow through the hydraulic oil radiator; for example, when the first windshield is fully open, it blocks most of the cooling airflow to reduce hydraulic oil heat dissipation.

[0035] S3. When the current hydraulic oil temperature is higher than the second preset threshold, control the first windshield to be completely closed; when the current coolant temperature is higher than the third preset threshold, control the second windshield, which is located on the air intake side of the coolant radiator of the power shift tractor, to be completely closed.

[0036] The second preset threshold refers to an upper limit threshold for hydraulic oil temperature, used to trigger the high-temperature heat dissipation mode; for example, if the second preset threshold is set to 95℃, the first windshield will be completely closed when the hydraulic oil temperature exceeds 95℃. The third preset threshold refers to an upper limit threshold for coolant temperature, used to trigger the high-temperature heat dissipation mode; for example, if the third preset threshold is set to 100℃, the second windshield will be completely closed when the coolant temperature exceeds 100℃. The coolant radiator refers to a heat exchange device used to cool engine coolant; for example, a coolant radiator independently placed side-by-side in a tractor's cooling pack. The coolant radiator's air intake side refers to the side of the coolant radiator facing the direction of the fan's airflow; for example, the cooling airflow generated by the fan blows towards the coolant radiator's air intake side. The second windshield refers to a controllable windshielding device installed on the coolant radiator's air intake side, used to regulate the airflow through the coolant radiator; for example, when the second windshield is completely closed, maximum airflow is allowed to enhance coolant heat dissipation.

[0037] S4. When the current hydraulic oil temperature is between the first preset threshold and the second preset threshold, and the current coolant temperature is lower than the third preset threshold, based on the current hydraulic oil temperature and the current coolant temperature, by controlling the opening of the first windproof curtain and the second windproof curtain respectively, the fixed total cooling air volume provided by the fan connected to the engine of the power shift tractor is distributed to the hydraulic oil radiator and the coolant radiator according to the required proportion.

[0038] Here, "engine" refers to the power source of a power-shift tractor, driving the fan and hydraulic system; for example, a diesel engine outputs power through the crankshaft, driving a rigidly connected fan to rotate. "Fan" refers to a device rigidly connected to the engine, used to generate cooling airflow; for example, a fan with a fixed speed ratio changes its speed according to the engine speed, providing forced air cooling. "Fixed total cooling airflow" refers to the total airflow provided by the fan at a specific engine speed that cannot be independently adjusted; for example, at an engine speed of 1500 rpm, the fan produces a fixed total cooling airflow. "Demand ratio" refers to the airflow distribution ratio dynamically calculated based on the current hydraulic oil temperature and the current coolant temperature; for example, when the hydraulic oil temperature is high, more airflow is allocated to the hydraulic oil radiator.

[0039] The technical solution of this embodiment monitors the temperature of hydraulic oil and coolant in real time and dynamically distributes the fixed total cooling air volume of the engine fan using a windproof curtain. At low temperatures, it reduces the heat dissipation of hydraulic oil to avoid excessive cooling, and at high temperatures, it increases the heat dissipation to prevent overheating. This solves the problem of excessive heat dissipation at low temperatures and insufficient heat dissipation at high temperatures caused by the coupling of fan speed and engine in traditional systems, and realizes differentiated and precise thermal management of coolant and hydraulic oil in power shift tractors.

[0040] In one alternative approach, S1 specifically includes: The current hydraulic oil temperature is obtained in real time by a hydraulic oil temperature sensor installed in the hydraulic circuit of the power shift tractor.

[0041] Hydraulic circuit refers to the pipeline system through which hydraulic oil circulates; for example, a closed circuit including a hydraulic pump, hydraulic cylinder, and hydraulic oil cooler. Hydraulic oil temperature sensor refers to a sensor installed in the hydraulic circuit to detect the temperature of the hydraulic oil; for example, a temperature sensor installed in the hydraulic oil return line to collect the hydraulic oil temperature in real time.

[0042] The current coolant temperature is obtained in real time by a coolant temperature sensor installed in the coolant circuit of the power shift tractor.

[0043] The coolant circuit refers to the piping system through which coolant circulates; for example, it includes the circulation loop of the engine water jacket, water pump, and coolant radiator. The coolant temperature sensor refers to a sensor installed in the coolant circuit to detect the coolant temperature; for example, a temperature sensor located at the engine outlet to collect coolant temperature data in real time.

[0044] In the above-mentioned optional methods, temperature sensors can be installed in the hydraulic circuit and coolant circuit to acquire temperature data in real time, thereby improving the accuracy and response speed of temperature monitoring and providing a reliable foundation for subsequent precise control.

[0045] In one alternative approach, the step of fully opening the first windshield, which is controlled on the air intake side of the hydraulic oil radiator of the power shift tractor, includes: A first control command is generated, and a first drive mechanism connected to the first windproof curtain is driven according to the first control command to move the first windproof curtain to a fully open position.

[0046] The first control command refers to a signal generated by the controller to fully open the first windshield; for example, when the hydraulic oil temperature is below 40°C, the controller generates a first control command to drive the first drive mechanism. The first drive mechanism refers to a mechanical device connected to the first windshield for moving it; for example, an electric push rod receives the first control command and pulls the first windshield to the fully open position. The fully open position refers to the maximum opening of the first windshield, where airflow is most obstructed; for example, the first windshield rotates to a 90-degree angle, completely covering the air inlet side of the hydraulic oil radiator.

[0047] In the above-mentioned optional methods, by generating a first control command and driving the first drive mechanism, the air inlet side curtain of the hydraulic oil radiator can be fully opened to ensure that the cooling airflow is effectively blocked during the low-temperature preheating stage.

[0048] In one alternative approach, the step of controlling the first windproof curtain to close completely includes: A second control command is generated, and the first drive mechanism is driven according to the second control command to move the first windshield to a fully closed position.

[0049] The second control command refers to a signal generated by the controller to control the first air curtain to close completely; for example, when the hydraulic oil temperature is higher than 95°C, the controller generates a second control command to drive the first drive mechanism. The fully closed position refers to the minimum opening position of the first air curtain, at which point the obstruction to airflow is minimal; for example, the first air curtain rotates to a 0-degree angle, fully exposing the air inlet side of the hydraulic oil radiator.

[0050] The step of completely closing the second windshield, which is controlled by the cooling radiator air intake side of the power shift tractor, includes: A third control command is generated, and a second drive mechanism connected to the second windshield is driven according to the third control command to move the second windshield to a fully closed position.

[0051] The third control command refers to a signal generated by the controller to control the second windshield to close completely; for example, when the coolant temperature is higher than 100°C, the controller generates a third control command to drive the second drive mechanism. The second drive mechanism refers to a mechanical device connected to the second windshield for moving the windshield; for example, an electric push rod pushes the second windshield to the fully closed position after receiving the third control command.

[0052] In the above-mentioned optional methods, by generating second and third control commands, the first and second drive mechanisms are driven respectively to realize the independent closing control of the two windproof curtains, so as to meet the differentiated needs of high temperature heat dissipation and low temperature preheating.

[0053] In an alternative embodiment, the step of distributing a fixed total cooling airflow provided by a fan connected to the engine of the power shift tractor to the hydraulic oil radiator and the coolant radiator in a demand proportion by controlling the opening of the first and second windshields respectively, based on the current hydraulic oil temperature and the current coolant temperature, includes: Under the condition of fixed total cooling air volume, the first target opening degree of the first windshield is determined according to the current hydraulic oil temperature, and the second target opening degree of the second windshield is determined according to the current coolant temperature.

[0054] The first target opening degree refers to the ideal opening value of the first windshield calculated based on the current hydraulic oil temperature; for example, a fuzzy control algorithm determines the first target opening degree to be 50%, indicating that the first windshield is half-open. The second target opening degree refers to the ideal opening value of the second windshield calculated based on the current coolant temperature; for example, a fuzzy control algorithm determines the second target opening degree to be 30%, indicating that the second windshield is partially open.

[0055] A first target control command is generated based on the first target opening degree and sent to the first drive mechanism. A second target control command is generated based on the second target opening degree and sent to the second drive mechanism. The first drive mechanism moves the first windshield to the first target opening degree, and the second drive mechanism moves the second windshield to the second target opening degree, thereby completing the proportional distribution of the fixed total cooling air volume between the hydraulic oil radiator and the coolant radiator.

[0056] The proportional allocation refers to dynamically allocating the fixed total cooling air volume to the hydraulic oil radiator and the coolant radiator according to the calculated demand ratio. For example, a combination of a first air curtain opening of 50% and a second air curtain opening of 30% allocates 60% of the air volume to the hydraulic oil radiator and 40% to the coolant radiator.

[0057] In the above-mentioned optional methods, under the condition of fixed total cooling air volume, the target opening degree of the windproof curtain is determined according to the real-time temperature and a corresponding control command is generated to realize the precise on-demand distribution of cooling air volume between the two radiators.

[0058] In an alternative approach, the step of determining a first target opening of the first windshield based on the current hydraulic oil temperature and a second target opening of the second windshield based on the current coolant temperature, under the condition of a fixed total cooling airflow, includes: Under the condition of fixed total cooling air volume, a first mapping relationship is established between the first temperature difference between the hydraulic oil temperature and the second preset threshold and the opening degree of the first windshield; wherein, the first mapping relationship maps the first temperature difference to multiple discrete opening degree levels of the first windshield through a first fuzzy control algorithm.

[0059] The first temperature difference refers to the difference between the current hydraulic oil temperature and the second preset threshold; for example, if the current hydraulic oil temperature is 97℃ and the second preset threshold is 95℃, the first temperature difference is +2℃. The first mapping relationship refers to the correspondence between the first temperature difference and the first opening level of the windshield; for example, through the first fuzzy control algorithm, the first temperature difference of +2℃ is mapped to the first opening level 2. The first fuzzy control algorithm is a control algorithm used to fuzzily infer the first opening level based on the first temperature difference; for example, when the first temperature difference is positive, the output is a reduced first opening level. Discrete opening levels refer to dividing the windshield opening into a finite number of levels; for example, the opening levels are divided into 1 to 5, with level 1 corresponding to fully open and level 5 corresponding to fully closed.

[0060] Under the condition of fixed total cooling air volume, a second mapping relationship is established between the second temperature difference between the coolant temperature and the third preset threshold and the opening degree of the second windshield; wherein, the second mapping relationship maps the second temperature difference to multiple discrete opening degree levels of the second windshield through a second fuzzy control algorithm.

[0061] The second temperature difference refers to the difference between the current coolant temperature and the third preset threshold; for example, if the current coolant temperature is 102℃ and the third preset threshold is 100℃, the second temperature difference is +2℃. The second mapping relationship refers to the correspondence between the second temperature difference and the second vent opening level; for example, through the second fuzzy control algorithm, the second temperature difference of +2℃ is mapped to the second opening level 2. The second fuzzy control algorithm is a control algorithm used to fuzzily infer the second opening level based on the second temperature difference; for example, when the second temperature difference is positive, a decreased second opening level is output.

[0062] The first opening level obtained based on the current hydraulic oil temperature and the first mapping relationship is mapped to the first target opening level, and the second opening level obtained based on the current coolant temperature and the second mapping relationship is mapped to the second target opening level.

[0063] The first opening level refers to the opening level of the first windproof curtain obtained through the first mapping relationship; for example, the first opening level 3 corresponds to the first target opening level of 60%. The second opening level refers to the opening level of the second windproof curtain obtained through the second mapping relationship; for example, the second opening level 4 corresponds to the second target opening level of 40%.

[0064] The first fuzzy control algorithm is configured such that when the first temperature difference is positive, a reduced first opening level is mapped, and when the first temperature difference is negative, an increased first opening level is mapped. The second fuzzy control algorithm is configured such that when the second temperature difference is positive, a reduced second opening level is mapped, and when the second temperature difference is negative, an increased second opening level is mapped.

[0065] Among the above-mentioned optional methods, a fuzzy control algorithm is further adopted to establish a mapping relationship between temperature difference and the opening degree of the windshield curtain, converting the continuous temperature signal into discrete opening degree levels, thereby improving the intelligence and stability of the control process.

[0066] In one alternative approach, it also includes: When the current hydraulic oil temperature is higher than the second preset threshold and the current coolant temperature is higher than the third preset threshold, an engine speed increase command is generated.

[0067] Among them, the engine speed increase command refers to the signal generated by the controller to increase the engine speed; for example, when the hydraulic oil temperature is higher than 95°C and the coolant temperature is higher than 100°C, the engine speed increase command is generated to increase the engine speed from 1500 rpm to 2000 rpm.

[0068] The engine is controlled to increase its speed according to the engine speed increase command, or a prompt message is output to prompt the user to increase the engine speed according to the engine speed increase command.

[0069] The prompt message refers to a message sent to the user to increase the engine speed; for example, displaying the text message "Please increase the engine speed to enhance heat dissipation" on the cab display screen.

[0070] In the above-mentioned optional methods, an engine speed increase command is further generated when both hydraulic oil and coolant temperatures exceed the standard. This enhances the heat dissipation capacity under extreme operating conditions by actively increasing the fan speed or prompting the user to operate.

[0071] like Figure 2As shown, the thermal management control architecture of the power shift tractor illustrates the connection relationships and working principles of its various physical components. A coolant temperature sensor is installed in the coolant circuit to monitor the coolant temperature in real time; a hydraulic oil temperature sensor is installed in the hydraulic circuit to monitor the hydraulic oil temperature in real time. Both sensors transmit the collected temperature signals to the controller. The controller compares the received temperature data with preset thresholds: when the hydraulic oil temperature is below the first preset threshold, the controller generates a first control command, moving the first windshield to the fully open position via the first drive mechanism; when the hydraulic oil temperature is above the second preset threshold, the controller generates a second control command, moving the first windshield to the fully closed position via the first drive mechanism; when the coolant temperature is above the third preset threshold, the controller generates a third control command, moving the second windshield to the fully closed position via the second drive mechanism. Under normal operating conditions, the controller calculates the first target opening degree of the first windshield based on real-time temperature data using a first fuzzy control algorithm and the second target opening degree of the second windshield using a second fuzzy control algorithm. It then drives the first and second drive mechanisms respectively to adjust the windshield opening, thereby achieving precise distribution of the fixed total cooling airflow provided by the rigidly connected engine fan between the hydraulic oil radiator and the coolant radiator. Under extreme operating conditions, the controller can also generate an engine speed increase command to increase the fan speed or output a prompt message to the driver.

[0072] like Figure 3 As shown, the logic flow of the thermal management control of the power shift tractor details the controller's decision-making process. The controller continuously receives coolant temperature signals from the coolant temperature sensor and hydraulic oil temperature signals from the hydraulic oil temperature sensor. The control logic first determines whether the hydraulic oil temperature is below a first preset threshold: if so, it executes low-temperature preheating control, controlling the first windshield to move to the fully open position. If not, it further determines whether the hydraulic oil temperature is above a second preset threshold or whether the coolant temperature is above a third preset threshold: if so, it executes high-temperature heat dissipation control, controlling the corresponding windshield to move to the fully closed position. If neither of the above conditions is met, i.e., the hydraulic oil temperature is between the first and second preset thresholds and the coolant temperature is below the third preset threshold, the controller enters intelligent airflow distribution mode, dynamically calculating the target opening degree of the first and second windshields based on real-time temperature data using a fuzzy control algorithm, and independently adjusting the opening state of the two windshields. In addition, the controller continuously monitors whether the conditions of the hydraulic oil temperature being above the second preset threshold and the coolant temperature being above the third preset threshold are simultaneously met: if so, it generates an engine speed adjustment command, enhancing heat dissipation capacity by increasing engine speed or outputting driver prompts. The complete control logic described above achieves precise control of the thermal management system of the power shift tractor through multi-level condition judgments and corresponding control actions.

[0073] Figure 4 A schematic diagram of an embodiment of a thermal management control system for a power shift tractor provided by the present invention is shown. Figure 4 As shown, the thermal management control system 200 for the power shift tractor includes: Temperature acquisition module 201 is used to acquire the current hydraulic oil temperature and current coolant temperature of the power shift tractor; The low-temperature preheating module 202 is used to control the first windproof curtain on the air intake side of the hydraulic oil radiator of the power shift tractor to be fully opened when the current hydraulic oil temperature is lower than the first preset threshold. The high-temperature heat dissipation module 203 is used to control the first windshield to be completely closed when the current hydraulic oil temperature is higher than the second preset threshold; and to control the second windshield, which is located on the air intake side of the coolant radiator of the power shift tractor, to be completely closed when the current coolant temperature is higher than the third preset threshold. The air volume distribution module 204 is used to distribute the fixed total cooling air volume provided by the fan connected to the engine of the power shift tractor to the hydraulic oil radiator and the coolant radiator according to the required proportion when the current hydraulic oil temperature is between the first preset threshold and the second preset threshold, and the current coolant temperature is lower than the third preset threshold, based on the current hydraulic oil temperature and the current coolant temperature, by controlling the opening degree of the first windproof curtain and the second windproof curtain respectively.

[0074] In one alternative embodiment, the temperature acquisition module 201 is specifically used for: The current hydraulic oil temperature is obtained in real time by a hydraulic oil temperature sensor installed in the hydraulic circuit of the power shift tractor. The current coolant temperature is obtained in real time by a coolant temperature sensor installed in the coolant circuit of the power shift tractor.

[0075] In one alternative embodiment, the low-temperature preheating module 202 is specifically used for: A first control command is generated, and a first drive mechanism connected to the first windproof curtain is driven according to the first control command to move the first windproof curtain to a fully open position.

[0076] In one alternative embodiment, the high-temperature heat dissipation module 203 is specifically used for: A second control command is generated, and the first drive mechanism is driven according to the second control command to move the first windshield to a fully closed position through the first drive mechanism; The high-temperature heat dissipation module 203 is specifically used for: A third control command is generated, and a second drive mechanism connected to the second windshield is driven according to the third control command to move the second windshield to a fully closed position.

[0077] In one alternative embodiment, the air volume distribution module 204 is specifically used for: Under the condition of fixed total cooling air volume, the first target opening degree of the first windshield is determined according to the current hydraulic oil temperature, and the second target opening degree of the second windshield is determined according to the current coolant temperature; A first target control command is generated based on the first target opening degree and sent to the first drive mechanism. A second target control command is generated based on the second target opening degree and sent to the second drive mechanism. The first drive mechanism moves the first windshield to the first target opening degree, and the second drive mechanism moves the second windshield to the second target opening degree, thereby completing the proportional distribution of the fixed total cooling air volume between the hydraulic oil radiator and the coolant radiator.

[0078] In one alternative embodiment, the air volume distribution module 204 is specifically used for: Under the condition of fixed total cooling air volume, a first mapping relationship is established between the first temperature difference between the hydraulic oil temperature and the second preset threshold and the opening degree of the first windshield; wherein, the first mapping relationship maps the first temperature difference to multiple discrete opening degree levels of the first windshield through a first fuzzy control algorithm. Under the condition of fixed total cooling air volume, a second mapping relationship is established between the second temperature difference between the coolant temperature and the third preset threshold and the opening degree of the second windshield; wherein, the second mapping relationship is used by a second fuzzy control algorithm to map the second temperature difference into multiple discrete opening degree levels of the second windshield; The first opening level obtained based on the current hydraulic oil temperature and the first mapping relationship is mapped to the first target opening level, and the second opening level obtained based on the current coolant temperature and the second mapping relationship is mapped to the second target opening level; The first fuzzy control algorithm is configured such that when the first temperature difference is positive, a reduced first opening level is mapped, and when the first temperature difference is negative, an increased first opening level is mapped. The second fuzzy control algorithm is configured such that when the second temperature difference is positive, a reduced second opening level is mapped, and when the second temperature difference is negative, an increased second opening level is mapped.

[0079] In one alternative embodiment, the system further includes a speed control module; the speed control module is used for: When the current hydraulic oil temperature is higher than the second preset threshold and the current coolant temperature is higher than the third preset threshold, an engine speed increase command is generated; The engine is controlled to increase its speed according to the engine speed increase command, or a prompt message is output to prompt the user to increase the engine speed according to the engine speed increase command.

[0080] It should be noted that the beneficial effects of the power shift tractor thermal management control system 200 provided in the above embodiments are the same as those of the power shift tractor thermal management control method described above, and will not be repeated here. Furthermore, the system provided in the above embodiments is only illustrated by the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the system can be divided into different functional modules according to the actual situation to complete all or part of the functions described above. In addition, the system and method embodiments provided in the above embodiments belong to the same concept, and their specific implementation process is detailed in the method embodiments, and will not be repeated here.

[0081] The power shift tractor thermal management control system 200 of the present invention can be a computer program (including program code) running on a computer device. For example, the power shift tractor thermal management control system 200 of the present invention is an application software that can be used to execute the corresponding steps in the power shift tractor thermal management control method of the present invention.

[0082] In some embodiments, the power shift tractor thermal management control system 200 of the present invention can be implemented in a combination of hardware and software. As an example, the power shift tractor thermal management control system 200 of the present invention can be a processor in the form of a hardware decoding processor, which is programmed to execute the power shift tractor thermal management control method of the present invention. For example, the processor in the form of a hardware decoding processor can be one or more application specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), field-programmable gate arrays (FPGAs), or other electronic components.

[0083] The modules described in the embodiments of this invention can be implemented in software or hardware. The names of the modules are not, in some cases, limiting the scope of the module itself.

[0084] An electronic device according to an embodiment of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements any of the above-described power shift tractor thermal management control methods. That is, an electronic device according to an embodiment of the present invention may include, but is not limited to: a processor and a memory; the memory is used to store the computer program; the processor is used to execute the power shift tractor thermal management control method shown in any embodiment of the present invention by calling the computer program.

[0085] In one alternative embodiment, an electronic device is provided, such as Figure 5 As shown, Figure 5 The illustrated electronic device 4000 includes a processor 4001 and a memory 4003. The processor 4001 and the memory 4003 are connected, for example, via a bus 4002. Optionally, the electronic device 4000 may further include a transceiver 4004, which can be used for data interaction between the electronic device and other electronic devices, such as sending and / or receiving data. It should be noted that in practical applications, the transceiver 4004 is not limited to one type, and the structure of the electronic device 4000 does not constitute a limitation on the embodiments of the present invention.

[0086] Processor 4001 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this invention. Processor 4001 may also be a combination that implements computational functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

[0087] Bus 4002 may include a path for transmitting information between the aforementioned components. Bus 4002 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. Bus 4002 can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 5The bus 4002 is represented by only one thick line, but this does not mean that there is only one bus or one type of bus.

[0088] The memory 4003 may be ROM (Read Only Memory) or other types of static storage devices capable of storing static information and instructions, RAM (Random Access Memory) or other types of dynamic storage devices capable of storing information and instructions, or EEPROM (Electrically Erasable Programmable Read Only Memory), CD-ROM (Compact Disc Read Only Memory) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto.

[0089] The memory 4003 stores application code (computer program) for executing the present invention, and its execution is controlled by the processor 4001. The processor 4001 executes the application code stored in the memory 4003 to implement the content shown in the foregoing method embodiments.

[0090] Among them, electronic devices can also be terminal devices. A terminal device can be any terminal device that can install applications and access web pages through applications, including at least one of smartphones, tablets, laptops, desktop computers, smart speakers, smartwatches, smart TVs, and smart in-vehicle devices.

[0091] It should be noted that, Figure 5 The electronic device shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of the present invention.

[0092] An embodiment of the present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements any of the above-described power shift tractor thermal management control methods.

[0093] Alternatively, the computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a compact disc read-only memory (CD-ROM), magnetic tape, a floppy disk, and an optical data storage device, etc.

[0094] In an exemplary embodiment, a computer program product or computer program is also provided, which includes computer instructions stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the electronic device to perform the aforementioned power-shift tractor thermal management control method.

[0095] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0096] It should be understood that the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of methods and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0097] The computer-readable storage medium provided in this invention can be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this invention, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0098] The aforementioned computer-readable storage medium carries one or more programs, which, when executed by the electronic device, cause the electronic device to perform the method shown in the above embodiments.

[0099] The above description is merely a preferred embodiment of the present invention and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure in this invention is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-disclosed concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this invention.

[0100] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and represent a limitation on a specific order or sequence. Where appropriate, the order of use for similar objects can be interchanged so that the embodiments of this application described herein can be implemented in an order other than that shown or described.

[0101] Those skilled in the art will recognize that this invention can be implemented as a system, method, or computer program product. Therefore, this invention can be specifically implemented in the following forms: it can be entirely hardware, entirely software (including firmware, resident software, microcode, etc.), or a combination of hardware and software, generally referred to herein as a "circuit," "module," or "system." Furthermore, in some embodiments, this invention can also be implemented as a computer program product contained in one or more computer-readable media, which includes computer-readable program code.

[0102] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A thermal management control method for a power shift tractor, characterized in that, include: The current hydraulic oil temperature is obtained in real time by a hydraulic oil temperature sensor installed in the hydraulic circuit of the power shift tractor, and the current coolant temperature is obtained in real time by a coolant temperature sensor installed in the coolant circuit of the power shift tractor. When the current hydraulic oil temperature is lower than a first preset threshold, a first control command is generated, and a first drive mechanism connected to the first windproof curtain is driven according to the first control command, so as to move the first windproof curtain to a fully open position through the first drive mechanism; wherein, the first windproof curtain is disposed on the air inlet side of the hydraulic oil radiator; When the current hydraulic oil temperature is higher than a second preset threshold, a second control command is generated, and the first drive mechanism is driven according to the second control command to move the first windshield to a fully closed position; when the current coolant temperature is higher than a third preset threshold, a third control command is generated, and the second drive mechanism connected to the second windshield is driven according to the third control command to move the second windshield to a fully closed position; wherein, the second windshield is disposed on the air inlet side of the coolant radiator; When the current hydraulic oil temperature is between the first preset threshold and the second preset threshold, and the current coolant temperature is lower than the third preset threshold, under the condition of a fixed total cooling airflow, a first mapping relationship is established between the first temperature difference between the hydraulic oil temperature and the second preset threshold and the opening degree of the first windshield, and a second mapping relationship is established between the second temperature difference between the coolant temperature and the third preset threshold and the opening degree of the second windshield; wherein, the first mapping relationship maps the first temperature difference to multiple discrete opening degree levels of the first windshield through a first fuzzy control algorithm; the second mapping relationship maps the second temperature difference to multiple discrete opening degree levels of the second windshield through a second fuzzy control algorithm; the first fuzzy control algorithm is configured such that: when the first temperature difference is positive, a decreased first opening degree level is mapped, and when the first temperature difference is negative, an increased first opening degree level is mapped; the second fuzzy control algorithm is configured such that: when the second temperature difference is positive, a decreased second opening degree level is mapped, and when the second temperature difference is negative, an increased second opening degree level is mapped; The first opening level obtained based on the current hydraulic oil temperature and the first mapping relationship is mapped to the first target opening level, and the second opening level obtained based on the current coolant temperature and the second mapping relationship is mapped to the second target opening level; A first target control command is generated based on the first target opening degree and sent to the first drive mechanism. A second target control command is generated based on the second target opening degree and sent to the second drive mechanism. The first windshield is moved to the first target opening degree by the first drive mechanism and the second windshield is moved to the second target opening degree by the second drive mechanism, thereby completing the proportional distribution of the fixed total cooling air volume between the hydraulic oil radiator and the coolant radiator. When the current hydraulic oil temperature is higher than the second preset threshold and the current coolant temperature is higher than the third preset threshold, an engine speed increase command is generated; the engine is controlled to increase its speed according to the engine speed increase command, or a prompt message is output to prompt the user to increase the engine speed according to the engine speed increase command.

2. A thermal management control system for a power shift tractor, characterized in that, The thermal management control method for power-shift tractors as described in claim 1, the system comprising: The temperature acquisition module is used to obtain the current hydraulic oil temperature and the current coolant temperature of the power shift tractor. The low-temperature preheating module is used to control the first windshield curtain located on the air intake side of the hydraulic oil radiator of the power shift tractor to fully open when the current hydraulic oil temperature is lower than the first preset threshold. A high-temperature heat dissipation module is used to control the first windshield to be completely closed when the current hydraulic oil temperature is higher than a second preset threshold; and to control the second windshield, which is located on the air intake side of the coolant radiator of the power shift tractor, to be completely closed when the current coolant temperature is higher than a third preset threshold. The airflow distribution module is used to distribute the fixed total cooling airflow provided by the fan connected to the engine of the power shift tractor to the hydraulic oil radiator and the coolant radiator according to the required proportion when the current hydraulic oil temperature is between the first preset threshold and the second preset threshold, and the current coolant temperature is lower than the third preset threshold, based on the current hydraulic oil temperature and the current coolant temperature, by controlling the opening of the first windproof curtain and the second windproof curtain respectively.

3. An electronic device, characterized in that, The electronic device includes a processor coupled to a memory, the memory storing at least one computer program, which is loaded and executed by the processor to enable the electronic device to implement the power shift tractor thermal management control method as described in claim 1.

4. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one computer program, which, when executed by a processor, implements the thermal management control method for a power shift tractor as described in claim 1.

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