Cooling control method and system for power equipment, power equipment and medium

Abstract

The invention discloses a cooling control method and system for power equipment, the power equipment and a medium, and relates to the technical field of engines, the cooling control system comprises a target component driven by the power equipment and a heating device, the heating device comprises a water pump and a heating function component, and the water pump is arranged in a cooling loop of the power equipment; the method comprises the steps that in response to shutdown of the power equipment and the fact that the accumulated operation duration exceeds a set duration threshold value, the water pump is controlled to operate for a target cooling duration so as to drive a cooling medium to cool a target component, and a heating functional component of the heating device is controlled to stop working. According to the method, the existing heating device water pump of the equipment is reused, the target part which runs at a high load is cooled as required after the power equipment is shut down, and the reliability of the target part is effectively improved and the energy consumption of the system is remarkably reduced on the premise that additional hardware does not need to be added and the power equipment does not need to run at an idle speed.

Description

Technical Field

[0001] This invention relates to the field of engine technology, and more specifically to a cooling control method, system, power equipment, and medium for power equipment. Background Technology

[0002] In turbocharged engines, especially those using fuels like methanol and natural gas with high exhaust temperatures, the turbocharger can experience reheating due to residual heat after a sudden engine shutdown under high-temperature conditions. This phenomenon causes a sharp rise in the temperature of the engine oil inside the turbocharger, leading to coking and carbonization, which severely affects the reliability and lifespan of the turbocharger.

[0003] To address this issue, existing technologies generally employ two solutions: first, using a turbocharger with an independent cooling water circuit, relying on a separate electric water pump to drive the coolant for cooling after the engine is shut down; second, controlling the engine to continue idling for a period of time when the engine needs to be shut down, utilizing the engine's own water pump and oil pump to provide cooling for the turbocharger. However, the solution of adding an independent electric water pump and cooling water circuit inevitably increases the system's hardware cost, weight, and structural complexity. The engine idling cooling solution essentially consumes fuel to maintain engine operation to drive the cooling system, especially in applications with frequent start-stop cycles, where the accumulated fuel consumption is considerable. In summary, existing technologies solve the problem by adding extra hardware or consuming extra energy, thus leading to increased costs or energy consumption. Summary of the Invention

[0004] The main objective of this invention is to provide a cooling control method, system, power equipment, and medium for power equipment. By reusing the existing heating device and water pump of the equipment, the target components that have undergone high-load operation are cooled on demand after the power equipment is shut down. Without adding additional hardware or requiring the power equipment to idle, the reliability of the target components is effectively improved and the system energy consumption is significantly reduced.

[0005] To achieve the above objectives, the embodiments of this application provide the following technical solutions: According to a first aspect of the present application, a cooling control method for a power equipment is provided, including a target component driven by the power equipment and a heating device, the heating device including a water pump and a heating functional component, the water pump being disposed in the cooling circuit of the power equipment and capable of controlled independent operation, the method comprising: The operating parameters of the power equipment are acquired in real time, the temperature characterization value of the target component is calculated based on the operating parameters, and the duration for which the temperature characterization value exceeds a preset first load threshold is accumulated to obtain the cumulative running time. In response to the shutdown of the power equipment and the cumulative running time exceeding a set time threshold, the target cooling time required for the target component to reach the set safe temperature is calculated based on the temperature characterization value. The water pump is controlled to run for the target cooling time to drive the cooling medium to cool the target component, and the heating function component of the heating device is controlled to stop working.

[0006] Optionally, calculating the target cooling time required for the target component to reach the set safe temperature based on the temperature characterization value includes: Based on the temperature characterization value, the preset initial temperature of the target area of ​​the target component, and the preset heat transfer coefficient, calculate the estimated peak temperature of the target area of ​​the target component in the uncooled state after shutdown. The target cooling time is calculated based on the difference between the estimated peak temperature and the set safe temperature, the real-time temperature of the cooling medium, and the preset flow rate.

[0007] Optionally, calculating the estimated peak temperature of the target region of the target component in a non-cooled state after shutdown, based on the temperature characterization value, the preset initial temperature of the target region of the target component, and the preset heat transfer coefficient, includes: A preset heat transfer function model is invoked, and the temperature characterization value is used as the body reference temperature of the target component. Combined with the preset initial temperature, the preset heat transfer coefficient, and the preset time limit, the highest temperature that the target area can reach within the preset time limit is calculated as the estimated peak temperature.

[0008] Optionally, the target component is a turbocharger, and the target area of ​​the target component is the turbocharger bearing; the heat transfer function model is used to characterize the process of heat transfer from the turbocharger housing to the turbocharger bearing when the coolant stops flowing.

[0009] Optionally, calculating the target cooling time based on the difference between the estimated peak temperature and the set safe temperature, the real-time temperature of the cooling medium, and the preset flow rate includes: The preset cooling efficiency model is invoked, and the difference between the estimated peak temperature and the set safe temperature is used as the reference value of the heat dissipation. Combined with the real-time temperature of the cooling medium, the preset flow rate, and the preset heat absorption coefficient, the heat exchange time required to eliminate the reference value of the heat dissipation is calculated as the target cooling time.

[0010] Optionally, the operating parameters include the rotational speed and load of the power equipment, and the calculation of the temperature characterization value of the target component based on the operating parameters includes: Based on the rotational speed and load of the power equipment, and according to the preset relationship between rotational speed, load and temperature, the temperature characterization value of the target component is obtained.

[0011] Optionally, the cumulative runtime is obtained by accumulating the duration for which the temperature characterization value exceeds a preset first load threshold, including: The cumulative runtime is obtained by accumulating the duration for which the temperature characterization value exceeds the preset first load threshold; when the duration for which the temperature characterization value is lower than the preset second load threshold exceeds a set reset duration threshold, the cumulative runtime is reset to zero; wherein, the preset second load threshold is lower than the first load threshold.

[0012] According to a second aspect of the present application, a cooling control system for a power equipment is provided, including a target component driven by the power equipment and a heating device. The heating device includes a water pump and a heating functional component. The water pump is disposed in the cooling circuit of the power equipment and can be controlled to operate independently. The system includes: The parameter calculation module is used to acquire the operating parameters of the power equipment in real time, calculate the temperature characterization value of the target component based on the operating parameters, and accumulate the duration for which the temperature characterization value exceeds a preset first load threshold to obtain the cumulative running time. The cooling time calculation module is used to calculate the target cooling time required for the target component to reach the set safe temperature based on the temperature characterization value in response to the shutdown of the power equipment and the cumulative running time exceeding the set time threshold. The control module is used to control the water pump to run for the target cooling time, so as to drive the cooling medium to cool the target component, and to control the heating function component of the heating device to stop working.

[0013] According to a third aspect of the present application, an electronic device is provided, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method described in the first aspect above.

[0014] According to a fourth aspect of the embodiments of this application, a computer-readable storage medium is provided having computer-readable instructions stored thereon, the computer-readable instructions being executable by a processor to implement the method described in the first aspect above.

[0015] In summary, this application provides a cooling control method, system, power equipment, and medium for power equipment, including a target component driven by the power equipment and a heating device. The heating device includes a water pump and a heating function component. The water pump is located in the cooling circuit of the power equipment and can operate independently under control. By acquiring the operating parameters of the power equipment in real time, the temperature characterization value of the target component is calculated based on the operating parameters, and the duration for which the temperature characterization value exceeds a preset first load threshold is accumulated to obtain a cumulative running time. In response to the shutdown of the power equipment and the cumulative running time exceeding a set time threshold, the target cooling time required for the target component to reach a set safe temperature is calculated based on the temperature characterization value. The water pump is controlled to run for the target cooling time to drive the cooling medium to cool the target component, and the heating function component of the heating device is controlled to stop working. By reusing the existing heating device water pump of the equipment, the target component that has been running under high load is cooled on demand after the power equipment is shut down. Without adding additional hardware or requiring the power equipment to idle, the reliability of the target component is effectively improved and the system energy consumption is significantly reduced. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0018] Figure 1 This application provides a schematic flowchart of a cooling control method for power equipment. Figure 2 This is a schematic diagram of the coolant heating device provided in the embodiments of this application; Figure 3 This is a schematic diagram of the engine cooling system circulation pipeline provided in an embodiment of this application; Figure 4 This is a schematic diagram of another engine cooling system circulation pipeline provided in an embodiment of this application; Figure 5A schematic diagram of the cooling control system for a power device provided in an embodiment of this application; Figure 6 This paper shows a structural diagram of an electronic device provided in an embodiment of this application; Figure 7 A diagram of a computer-readable storage medium provided in an embodiment of this application is shown.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0022] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0025] Figure 1 This application illustrates a cooling control method for a power equipment, comprising a target component driven by the power equipment and a heating device. The heating device includes a water pump and a heating functional component. The water pump is disposed in the cooling circuit of the power equipment and can be operated independently under control. The method includes: Step 101: Obtain the operating parameters of the power equipment in real time, calculate the temperature characterization value of the target component based on the operating parameters, and accumulate the duration for which the temperature characterization value exceeds a preset first load threshold to obtain the cumulative running time; Step 102: In response to the shutdown of the power equipment and the cumulative running time exceeding the set time threshold, calculate the target cooling time required for the target component to reach the set safe temperature based on the temperature characterization value; Step 103: Control the water pump to run for the target cooling time to drive the cooling medium to cool the target component, and control the heating function component of the heating device to stop working.

[0026] When power equipment (such as engines and generator sets) is running, target components (such as turbochargers and exhaust manifolds) accumulate heat due to operating load. After shutdown, the cooling medium (coolant / oil) usually stops flowing with the equipment, and residual heat is easily transferred to the core areas of the components (such as turbocharger bearings), causing abnormal temperature increases in the core areas and leading to risks such as deterioration of the lubricating medium and thermal deformation of components. One of the objectives of the embodiments in this application is to avoid reliability problems caused by such residual heat accumulation through targeted cooling control.

[0027] Existing solutions to the problem of residual heat after shutdown mostly involve maintaining cooling while the equipment is idling or adding a separate electric water pump and circuit. The former requires additional fuel to keep the equipment running, resulting in energy waste; the latter requires new hardware and supporting interfaces, increasing costs and layout space. The embodiments of this application aim to reuse the water pump of the original heating device of the power equipment, eliminating the need for new dedicated cooling hardware, while avoiding idling energy consumption, thus achieving the dual goals of cost reduction and energy saving.

[0028] Step 101 involves real-time monitoring of the target component's temperature characterization value and accumulating high-load duration to accurately identify cooling conditions (cooling is only initiated when the equipment is shut down and the accumulated duration exceeds a threshold). Step 102 calculates the target cooling duration based on the temperature characterization value, ensuring that the cooling intensity can reduce the target component to a set safe temperature, effectively avoiding lubrication failure and component deformation caused by residual heat, and directly improving the reliability and service life of the target component. The water pump integrated into the heating device (not a newly added independent water pump) eliminates the procurement and installation costs of a dedicated electronic water pump, supporting circuits, and control interfaces, while also reducing the space occupied by the equipment layout. Step 103 controls the water pump to run only for the target cooling duration, simultaneously stopping the operation of the heating function components, avoiding fuel consumption from idling cooling and energy waste from over-cooling, achieving the dual effect of reduced hardware costs and reduced operating energy consumption.

[0029] In one possible implementation, in step 101, the operating parameters include the rotational speed and load of the power equipment. Calculating the temperature characterization value of the target component based on the operating parameters includes: obtaining the temperature characterization value of the target component based on a preset correspondence between rotational speed, load, and temperature, according to the rotational speed and load of the power equipment.

[0030] Rotational speed and load are core parameters reflecting the operating conditions of power equipment and are strongly correlated with the temperature of target components. For example, at high speeds and high loads, the power equipment outputs high power, resulting in high heat dissipation load and increased temperature of the target components. Calculating temperature characterization values ​​based on a pre-defined rotational speed-load-temperature relationship accurately reflects the actual temperature trend of the target components. This also avoids the numerical drift or failure issues caused by high temperatures and vibrations in direct temperature measurements, improving the stability of temperature data. By using both temperature characterization values ​​and cumulative operating time as dual parameters, it is possible to distinguish between high-load shutdowns (requiring cooling) and low-load shutdowns (not requiring cooling), avoiding unnecessary cooling.

[0031] Direct temperature measurement of target components (such as turbochargers and exhaust manifolds) is often limited by installation space (compact component structure makes it difficult to place sensors) or environmental interference (high-temperature conditions can easily cause sensor failure), making it difficult to obtain stable temperature data. This application's embodiments indirectly calculate temperature characterization values ​​through rotational speed and load. One purpose is to avoid the limitations of direct temperature measurement and rely on conventionally measurable operating parameters of power equipment to achieve reliable characterization of the temperature state of target components.

[0032] In one possible implementation, step 101 involves accumulating the duration for which the temperature characterization value exceeds a preset first load threshold to obtain a cumulative running time, including: accumulating the duration for which the temperature characterization value exceeds the preset first load threshold to obtain the cumulative running time; and resetting the cumulative running time to zero when the duration for which the temperature characterization value is lower than a preset second load threshold exceeds a set reset duration threshold; wherein the preset second load threshold is lower than the first load threshold.

[0033] During the operation of power equipment, the temperature rise of target components (such as turbochargers) is not triggered instantaneously, but is the result of continuous high-load conditions. If the temperature exceeds the threshold only briefly and once, the amount of residual heat accumulated in the components is limited, and no additional cooling is required after shutdown. The embodiments of this application aim to accurately capture operating conditions where high loads are continuously applied and residual heat has accumulated significantly by accumulating the duration of the temperature characterization value exceeding the first load threshold. This avoids misjudging brief threshold exceedances as cooling scenarios and ensures that subsequent cooling control is only activated for truly demanding operating conditions.

[0034] By accumulating the duration exceeding the first load threshold, a distinction can be made between continuous high-load operation (where cooling is required as the accumulated duration increases) and short-term high-load operation (where cooling is not required as the accumulated duration is insufficient). For example, if a power equipment operates at high load for 10 minutes (accumulated duration exceeding the set threshold), cooling is required after shutdown; however, if it only operates at high load for 30 seconds (accumulated duration not exceeding the threshold), cooling is not required after shutdown, effectively avoiding energy waste caused by accidental triggering of cooling due to short-term high load. When the temperature reading is below the second load threshold and continues to exceed the reset time (e.g., 5 minutes of low-load operation), the target component has already reduced its residual heat to a low level through natural heat dissipation or conventional cooling, and the previously accumulated high-load duration is no longer relevant. At this point, resetting the accumulated time to zero ensures that subsequent accumulation only applies to the current new round of high-load conditions, avoiding the problem of accidental activation of cooling during current low-load shutdown due to unreset historical accumulated time, thus improving the timeliness and rationality of cooling control.

[0035] The two thresholds can be calibrated based on the heat resistance characteristics of the target component and actual operating data. For example, for a turbocharger, the first load threshold can be set when the temperature of the target component is close to the critical value that requires cooling (e.g., a turbocharger housing temperature of 200°C, corresponding to a level where residual heat accumulates to the point where it is easy to exceed the safe temperature after shutdown). The second load threshold is set when the temperature of the target component has dropped to a level where there is no need to worry about residual heat accumulation (e.g., 120°C, at which point even if the machine is shut down, the residual heat will not cause reliability risks). It is also necessary to ensure that the second threshold is significantly lower than the first threshold (e.g., the difference is not less than 50°C) to avoid overlapping of the two threshold ranges and causing confusion in judgment.

[0036] The reset duration threshold can be matched to the temperature drop rate of the target component under low load conditions. For example, it is found through testing that the turbocharger needs to run continuously for 8 minutes under low load conditions (temperature below the second threshold) to dissipate the accumulated residual heat to a safe level. At this time, the reset duration threshold can be set to 8 minutes to ensure that the accumulated duration is only reset when the low load lasts long enough and the residual heat has been fully dissipated. This avoids accidental reset due to a short period of low load (such as 2 minutes), which would cause the residual heat that was not dissipated in the early stage to be missed when the accumulation is restarted under subsequent high load conditions.

[0037] The cumulative duration can be achieved through the timer module of the control unit (such as ECU, VCU): when the temperature reading exceeds the first load threshold, the timer starts and begins timing (the unit can be set to seconds), updating the cumulative duration in real time; when the temperature reading is below the second load threshold, another low-load timer is started. If this timer exceeds the reset duration threshold, the cumulative duration is reset to zero; if the temperature reading exceeds the first load threshold again before the low-load timer exceeds the threshold, the low-load timer is reset to zero, and the cumulative duration continues to increase based on the previous value, ensuring that the timing logic is continuous and accurate.

[0038] In one possible implementation, in step 102, calculating the target cooling time required for the target component to reach the set safe temperature based on the temperature characterization value includes: calculating the estimated peak temperature of the target area of ​​the target component in the uncooled state after shutdown, based on the temperature characterization value, the preset initial temperature of the target area of ​​the target component, and the preset heat transfer coefficient; and calculating the target cooling time based on the difference between the estimated peak temperature and the set safe temperature, the real-time temperature of the cooling medium, and the preset flow rate.

[0039] The reliability risk of target components (such as turbochargers) mainly stems from excessively high temperatures in their core areas (such as bearings), rather than the overall temperature of the component. After shutdown, even if the overall temperature of the component decreases, the core area may continue to heat up due to residual heat accumulation (such as heat transfer from the turbocharger housing to the bearings). This application's embodiments calculate the estimated peak temperature of the core area using temperature characterization values, initial temperature, and heat transfer coefficients. The aim is to accurately capture the maximum residual heat risk value under uncooled conditions, providing a scientific basis for subsequent cooling time calculations and avoiding judgment biases caused by relying solely on component surface temperature.

[0040] Under different operating conditions, the amount of residual heat accumulated in the target component varies significantly (e.g., the residual heat is different after 1 hour of high-load operation versus 30 minutes), and a fixed cooling duration cannot accommodate this difference. Step 102 dynamically calculates the cooling duration based on temperature characterization values, rather than using a fixed duration, which can adapt to the differences in residual heat of the target component under different operating conditions, improving the flexibility and accuracy of cooling control. In this embodiment, the target cooling duration is calculated by combining the estimated difference between the peak temperature and the safe temperature with the cooling medium parameters. The purpose is to directly link the cooling duration with the actual heat that needs to be dissipated, ensuring that the core area temperature is reduced to a safe level without wasting energy.

[0041] In one possible implementation, the step of calculating the estimated peak temperature of the target area of ​​the target component in a non-cooled state after shutdown, based on the temperature characterization value, the preset initial temperature of the target area of ​​the target component, and the preset heat transfer coefficient, includes: calling a preset heat transfer function model, using the temperature characterization value as the body reference temperature of the target component, and combining the preset initial temperature, the preset heat transfer coefficient, and the preset time limit to calculate the highest temperature that the target area can reach within the preset time limit, as the estimated peak temperature.

[0042] Heat transfer within target components (such as from the turbocharger housing to the water jacket to the bearing) involves complex physical processes such as heat conduction and convection across multiple materials. Calculating the core region temperature directly using theoretical formulas is difficult and lacks real-time accuracy. This application introduces a pre-defined heat transfer function model to transform the complex heat transfer process into a model that can be quickly calculated using parameter input. Based on obtainable parameters such as the body's reference temperature, initial temperature, heat transfer coefficient, and time upper limit, it achieves accurate and efficient calculation of the predicted peak temperature of the core region after shutdown, providing a feasible quantitative basis for subsequent cooling control.

[0043] After shutdown, the temperature of the core area of ​​the target component will not rise indefinitely, but will gradually decrease after reaching its peak (natural heat dissipation). If no time boundary is set, the calculation result may exceed the actual residual heat risk period that needs to be addressed. This application's embodiment incorporates a preset time upper limit to focus on the critical period with the highest residual heat risk after shutdown (such as the first 120 seconds, when the core area temperature is likely to reach its peak). Only the highest temperature within this period is calculated to ensure that the estimated peak temperature accurately reflects the maximum residual heat risk requiring cooling intervention, avoiding invalid calculations or results that deviate from actual needs.

[0044] In one possible implementation, the target component is a turbocharger, and the target area of ​​the target component is the turbocharger bearing; the heat transfer function model is used to characterize the process of heat transfer from the turbocharger housing to the turbocharger bearing when the coolant stops flowing.

[0045] In turbochargers of power equipment (such as engines), bearings are a core component whose lifespan is shortened due to heat regeneration. After shutdown, the coolant stops flowing, and the heat accumulated in the turbocharger housing continues to be transferred to the bearings, causing the bearing temperature to rise and easily leading to failures such as lubricating oil carbonization and accelerated bearing wear. This application's embodiments clearly define the target component as the turbocharger and the target area as the bearing, locking in the core failure risk point of the turbocharger and avoiding the dispersion of cooling control in non-critical areas (such as the housing surface). This ensures that cooling resources are focused on the bearings that require the most protection, improving the targeting of cooling control. After the turbocharger stops, the cessation of coolant flow changes its internal heat transfer path (primarily solid conduction, with no convective heat transfer), significantly differing from the heat transfer pattern during operation. This application's embodiments define a heat transfer function model to characterize the heat transfer process from the housing to the bearing when the coolant stops flowing. This allows the model to closely match the actual heat transfer scenario after the turbocharger stops, avoiding temperature prediction deviations caused by using a general heat transfer model (which does not distinguish the coolant flow state), and ensuring that the calculated peak bearing temperature is consistent with the actual operating conditions.

[0046] In one possible implementation, in step 102, calculating the target cooling time based on the difference between the estimated peak temperature and the set safe temperature, the real-time temperature of the cooling medium, and the preset flow rate includes: calling a preset cooling efficiency model, using the difference between the estimated peak temperature and the set safe temperature as a reference value for the amount of heat to be dissipated, and combining the real-time temperature of the cooling medium, the preset flow rate, and the preset heat absorption coefficient to calculate the heat exchange time required to eliminate the reference value for the amount of heat to be dissipated, which is then used as the target cooling time.

[0047] The amount of heat that the target component (such as the turbocharger bearing) needs to dissipate after shutdown directly depends on the difference between the estimated peak temperature and the set safe temperature. The larger the difference, the greater the heat to be dissipated, and the longer the required cooling time. If the cooling time is set solely based on experience, insufficient cooling may occur when the difference is large, or excessive cooling may occur when the difference is small. This application introduces a preset cooling efficiency model to correlate the baseline value of the heat to be dissipated with the characteristics of the cooling medium (real-time temperature, flow rate, and heat absorption coefficient). Through quantitative calculation, a suitable cooling time is obtained to ensure that the cooling capacity is accurately matched with the heat to be dissipated. The cooling efficiency of the cooling medium is not constant: the lower the real-time temperature, the greater the temperature difference with the target component, and the stronger the heat absorption capacity; the larger the preset flow rate, the more medium flows through the heat exchange structure per unit time, and the higher the heat exchange efficiency; the heat absorption coefficient reflects the thermal conductivity of the medium itself, such as the different heat absorption coefficients of coolant and cooling oil. This application incorporates these parameters into the cooling efficiency model to avoid errors caused by using a fixed cooling time model that does not consider the medium state, and to ensure that an accurate cooling time can be calculated under different medium states.

[0048] The cooling control method described in this application can achieve hardware architecture reuse and functional adaptation based on a methanol boiler system. For example... Figure 2 The methanol boiler shown is a small coolant heating device that uses methanol as fuel. Its integrated water pump can be used as a circulation drive component of the heating device in this application. After the power equipment is shut down, it can be controlled to operate independently to drive the cooling medium (coolant) to cool the target component (such as the booster). The methanol pump, ignition device and other heating components stop working during the cooling process to avoid ineffective energy consumption.

[0049] Figure 2 The methanol boiler shown mainly consists of the following core components: a methanol inlet and a methanol pump. Methanol enters through the methanol inlet and is driven by the methanol pump to be transported to the combustion chamber. The methanol pump can be independently controlled for its start / stop and operation. A water pump provides power for the coolant circulation. The coolant flows in from the inlet, is driven by the water pump, flows through the internal heating chamber, and finally flows out from the outlet. In the cooling control scenario of this application, the water pump can be independently controlled and becomes the core power source driving the cooling medium to cool the target components. The air inlet provides combustion air to the combustion chamber, and the exhaust port is used to discharge the exhaust gas after combustion, ensuring the continuous combustion process. After the methanol is ignited in the combustion chamber, it exchanges heat with the coolant in the heating chamber to heat the coolant; the ignition device is used to ignite the methanol, and its start / stop can be independently controlled.

[0050] When the power equipment is running, the methanol boiler can be started on demand (the methanol pump delivers methanol, the ignition device ignites it, and the water pump drives the coolant to heat and output it); when the power equipment stops and the cooling trigger condition is met (the cumulative running time exceeds the threshold), the control logic of this application is activated, controlling the water pump of the methanol boiler to operate independently (target cooling time), while shutting down the methanol pump and the ignition device. The water pump drives the coolant to flow through the heat exchange structure of the target component (such as the water jacket of the booster), achieving precise cooling of the target component. This fully reuses the hardware resources of the methanol boiler and does not require additional cooling equipment.

[0051] In summary, the modular structure of the methanol boiler (each component can be controlled independently) provides hardware support for the scheme of cooling the target components after shutdown using a reclaimed water pump, while simultaneously shutting down the heating function. This allows the cooling control method of this application to be directly implemented based on existing methanol boiler systems, combining economy and practicality.

[0052] The cooling control method of this application can be implemented in the cooling system of a range extender equipped with a methanol engine and a methanol boiler. For example... Figure 3 As shown, the cooling system circulation pipeline of this methanol engine mainly consists of the following core components: Power cycle module: includes main water pump (drives coolant to circulate inside the engine) and methanol boiler water pump (the core actuator for cooling control in this application, which can independently control the coolant to cool the target component).

[0053] Heat dissipation and heating module: The radiator is used to dissipate coolant during engine operation; the methanol boiler is used to heat coolant under low temperature conditions, and its integrated water pump undertakes the cooling drive function of the target component after shutdown in this application; the heater module provides heating source for the whole vehicle.

[0054] Heat exchange component module: covering cylinder head, engine block / cylinder liner (core heat exchange components of the engine), turbocharger (a typical target component of this application, which requires cooling after shutdown), and oil cooler (for cooling engine oil).

[0055] Control and auxiliary modules: ECU (control unit, used to execute the cooling control logic of this application, such as calculating the target cooling time and controlling the start and stop of the water pump), expansion tank (to balance the volume and pressure of the coolant), thermostat (to adjust the circulation path of the coolant and ensure thermal management efficiency).

[0056] Figure 3 In the circulating pipeline of the methanol engine cooling system shown, the integrated methanol boiler water pump can serve as a circulation drive component of the heating device in this application. After the methanol engine (power equipment) is shut down, it operates independently under control to drive the coolant to cool the target components (such as the turbocharger). At the same time, the methanol heating function of the methanol boiler (methanol pump, ignition device, etc.) stops working during the cooling process to avoid unnecessary energy consumption. When the methanol engine is running, the coolant is driven by the water pump to circulate and dissipate heat between components such as the engine cylinder head, engine block / cylinder liner, turbocharger, and oil cooler. The methanol boiler can be started as needed. When the engine is shut down and the cooling trigger condition is met (cumulative running time exceeds the threshold), the control logic of this application is activated—controlling the methanol boiler water pump to operate independently (target cooling time), while simultaneously shutting down the methanol pump and ignition device of the methanol boiler. The water pump drives the coolant to flow through the heat exchange structure of the target components such as the turbocharger, achieving precise cooling of the target components after shutdown. This fully reuses the original hardware resources of the system and requires no additional cooling equipment.

[0057] In summary, the modular layout and independently controllable components of this system provide complete hardware support for the solution of using a reclaimed water pump to achieve precise cooling of the target component after shutdown, while simultaneously shutting down the heating function. This enables the cooling control method of this application to be efficiently implemented in existing range extender systems, combining technical feasibility and cost advantages.

[0058] Figure 4In the circulating pipeline shown, the water pump built into the methanol boiler is the core carrier of the circulating drive component of the heating device in this application: when the methanol engine (power equipment) is shut down and the cooling triggering conditions are met, the water pump can operate independently and under control, driving the coolant to precisely cool the target components (such as the turbocharger); at the same time, the methanol heating function of the methanol boiler (methanol pump, ignition device, etc.) stops working during the cooling process to avoid ineffective energy consumption. When the engine stops, if the cumulative running time exceeds the set threshold, the control logic of this application triggers the methanol boiler water pump to run (target cooling time) through the ECU, driving the coolant to flow along the pipeline through the heat exchange structure of the target components such as the turbocharger, so as to dissipate the residual heat of the target components after shutdown; this process completely reuses the hardware resources of the methanol boiler water pump, without the need for additional cooling equipment, and complements the original function of the water pump driving the coolant circulation during low-temperature heating of the system, which not only ensures the heating requirements for low-temperature start-up, but also solves the cooling problem after shutdown.

[0059] like Figure 4 As shown, when the engine is not running at low temperatures and the methanol boiler is heating, the coolant circulation is powered by a water pump integrated into the methanol boiler. This water pump is the same hardware as the water pump used to drive the cooling of the target components in the cooling control of this application, demonstrating a hardware reuse design where one pump serves multiple purposes. After flowing out of the methanol boiler, the coolant enters the engine cylinder head, engine block / cylinder liner, oil cooler, and other components through pipelines. After being heated, it flows back to the methanol boiler, forming a closed-loop circulation. The expansion tank is used to balance the coolant volume and pressure to ensure stable circulation.

[0060] The illustration clearly shows the function of the methanol boiler water pump under heating conditions. This application expands its application to the cooling conditions of the target components after the engine is shut down. By independently controlling the water pump, methanol pump and ignition device through the ECU, the function switching of a single hardware component in different scenarios is realized, which not only improves the hardware utilization rate, but also solves the problem of the reliability of residual heat of the target components after the power equipment is shut down.

[0061] To clearly demonstrate the logic of the cooling control method of this application in a real-world scenario, the following detailed implementation process of the method is illustrated through specific embodiments, using a typical application scenario of a range extender system equipped with a methanol engine, methanol boiler, and turbocharger.

[0062] Phase 1: Calculation of turbocharger casing temperature and operating time under medium and high loads.

[0063] This stage corresponds to the core logic of step 101, which involves real-time acquisition of operating parameters, calculation of temperature characterization values, and accumulation of operating time, combined with specific methods for calculating temperature characterization values ​​based on rotational speed and load.

[0064] Step 1: Calculate the turbocharger housing temperature; real-time acquisition of engine speed and torque (operating parameters), and obtaining the turbine inlet exhaust temperature by querying the preset turbine inlet exhaust temperature MAP. ; Retrieve data from the last 30 seconds The average value is used as the turbocharger housing temperature This refers to the temperature characterization value of the target component, which is used to reflect the thermal state of the turbocharger.

[0065] Step 2: Accumulate the duration of operation under medium and high loads; set the temperature threshold 1. (e.g., 550℃) is used as the preset first load threshold, and the cumulative load is calculated. Exceed The duration, to obtain (Cumulative runtime); and simultaneously set below Temperature threshold 2 (e.g., 500℃) is used as the preset second load threshold. Below The duration exceeds the set reset duration threshold. (e.g., 120s), then Reset to 0. If the engine is not turned off, repeat this step; if the engine is turned off, proceed to the second stage.

[0066] Phase Two: Judgment of Exceeding Limits During Medium-to-High Load Operation; This step corresponds to step 102, which responds to the trigger condition that the power equipment is shut down and the cumulative runtime exceeds a threshold. Check the results obtained in the first phase. Has the set duration threshold been exceeded? If the limit is not exceeded, it indicates that the supercharger has limited residual heat accumulation and no additional cooling is required, and the process ends; if the limit is exceeded, it indicates that there is a significant residual heat risk, and the process enters the third stage to calculate the cooling time.

[0067] Phase 3: Calculation of turbocharger cooling time (in two steps) This step corresponds to step 102, which calculates the target cooling time based on the temperature characterization value. It further refines the models and parameters for "peak temperature calculation" and "cooling time calculation".

[0068] Step 1: Calculation of the maximum temperature of the turbocharger bearing; Based on the calculation of the predicted peak temperature using a heat transfer function model and the constraints of the target component being the turbocharger and the target area being the bearing, the heat transfer path from the turbocharger housing to the water jacket to the bearing is calculated using an experimentally fitted heat transfer function model:

[0069] in, The preset heat transfer coefficient (an empirical value when the cooling water is not flowing) is used. The temperature characterization value (body reference temperature) obtained in the first stage. The initial temperature of the bearing when the engine is turned off (the preset initial temperature of the target area) is used, and t is set to a maximum of 120 seconds (the preset upper limit of time). The highest temperature of the bearing within 120 seconds is then obtained. (Estimated peak temperature).

[0070] Step 2: Cooling time calculation; Based on the logic of calculating the target cooling time using the cooling efficiency model, Bearing safety temperature The difference between the set temperature (e.g., 250℃, i.e., the "set safe temperature") and the actual heat dissipation is used as the baseline value, combined with the real-time temperature of the coolant. (Real-time temperature of cooling medium), preset flow rate The target cooling time is calculated using the measured flow rate (i.e., the "preset flow rate") and the heat absorption coefficient k (empirical value, i.e., the preset heat absorption coefficient) through a cooling efficiency model: .

[0071] Phase 4: Pump Operation Control; This step corresponds to step 103, which controls the water pump to run for the target cooling time and stops the heating function. After the engine is turned off, the vehicle control unit (VCU) controls the methanol pump and ignition device (heating function component) of the methanol boiler to stop working, while controlling its water pump (the water pump of the heating device) to continue running. The time is used to drive the coolant to flow through the turbocharger water jacket to cool the bearings, thereby reusing the heating device hardware and precisely controlling the cooling time.

[0072] In summary, this application provides a cooling control method for power equipment, including a target component driven by the power equipment and a heating device. The heating device includes a water pump and a heating function component. The water pump is located in the cooling circuit of the power equipment and can operate independently under control. By acquiring the operating parameters of the power equipment in real time, the method calculates the temperature characterization value of the target component based on the operating parameters, and accumulates the duration for which the temperature characterization value exceeds a preset first load threshold to obtain a cumulative running time. In response to the shutdown of the power equipment and the cumulative running time exceeding the set time threshold, the method calculates the target cooling time required for the target component to reach a set safe temperature based on the temperature characterization value. The method controls the water pump to run for the target cooling time to drive the cooling medium to cool the target component, and controls the heating function component of the heating device to stop working. By reusing the existing heating device water pump of the equipment, the method cools the target component that has been running under high load on demand after the power equipment is shut down. This effectively improves the reliability of the target component and significantly reduces system energy consumption without adding additional hardware or requiring the power equipment to idle.

[0073] Based on the same technical concept, embodiments of this application also provide a cooling control system for power equipment, such as... Figure 5 As shown, the system includes a target component driven by a power device and a heating device. The heating device includes a water pump and heating functional components. The water pump is located in the cooling circuit of the power device and can operate independently under control. The system includes: The parameter calculation module 501 is used to acquire the operating parameters of the power equipment in real time, calculate the temperature characterization value of the target component based on the operating parameters, and accumulate the duration for which the temperature characterization value exceeds a preset first load threshold to obtain the cumulative running time. The cooling time calculation module 502 is used to calculate the target cooling time required for the target component to reach the set safe temperature based on the temperature characterization value in response to the shutdown of the power equipment and the cumulative running time exceeding the set time threshold. The control module 503 is used to control the water pump to run for the target cooling time, so as to drive the cooling medium to cool the target component, and to control the heating function component of the heating device to stop working.

[0074] This application also provides an electronic device corresponding to the method provided in the foregoing embodiments. Please refer to... Figure 6The diagram illustrates an electronic device provided by some embodiments of this application. The electronic device 20 may include: a processor 200, a memory 201, a bus 202, and a communication interface 203, wherein the processor 200, the communication interface 203, and the memory 201 are connected via the bus 202; the memory 201 stores a computer program that can run on the processor 200, and when the processor 200 runs the computer program, it executes the method provided by any of the foregoing embodiments of this application.

[0075] The memory 201 may include high-speed random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Communication between this system network element and at least one other network element is achieved through at least one physical port (which can be wired or wireless), such as the Internet, wide area network, local area network, metropolitan area network, etc.

[0076] Bus 202 can be an ISA bus, PCI bus, or EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. The memory 201 is used to store programs. After receiving an execution instruction, the processor 200 executes the program. The method disclosed in any of the foregoing embodiments of this application can be applied to the processor 200, or implemented by the processor 200.

[0077] The processor 200 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of the processor 200 or by instructions in software form. The processor 200 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules may reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 201. The processor 200 reads the information in memory 201 and, in conjunction with its hardware, completes the steps of the above method.

[0078] The electronic devices and methods provided in the embodiments of this application are based on the same inventive concept and have the same beneficial effects as the methods they employ, operate, or implement.

[0079] This application also provides a computer-readable storage medium corresponding to the method provided in the foregoing embodiments. Please refer to... Figure 7 The computer-readable storage medium shown is an optical disc 30, on which a computer program (i.e., a program product) is stored, which, when run by a processor, executes the methods provided in any of the foregoing embodiments.

[0080] It should be noted that examples of the computer-readable storage medium may also include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other optical and magnetic storage media, which will not be elaborated here.

[0081] The computer-readable storage medium provided in the above embodiments of this application and the method provided in the embodiments of this application are based on the same inventive concept and have the same beneficial effects as the methods adopted, run or implemented by the applications stored therein.

[0082] It should be noted that the above embodiments are illustrative of this application and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. This application can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0083] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0084] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A cooling control method for power equipment, characterized in that, The method includes a target component driven by a power device and a heating device, the heating device comprising a water pump and heating functional components, the water pump being disposed in the cooling circuit of the power device and capable of controlled independent operation; the method includes: The operating parameters of the power equipment are acquired in real time, the temperature characterization value of the target component is calculated based on the operating parameters, and the duration for which the temperature characterization value exceeds a preset first load threshold is accumulated to obtain the cumulative running time. In response to the shutdown of the power equipment and the cumulative running time exceeding a set time threshold, the target cooling time required for the target component to reach the set safe temperature is calculated based on the temperature characterization value. The water pump is controlled to run for the target cooling time to drive the cooling medium to cool the target component, and the heating function component of the heating device is controlled to stop working.

2. The method as described in claim 1, characterized in that, The calculation of the target cooling time required for the target component to reach the set safe temperature based on the temperature characterization value includes: Based on the temperature characterization value, the preset initial temperature of the target area of ​​the target component, and the preset heat transfer coefficient, calculate the estimated peak temperature of the target area of ​​the target component in the uncooled state after shutdown. The target cooling time is calculated based on the difference between the estimated peak temperature and the set safe temperature, the real-time temperature of the cooling medium, and the preset flow rate.

3. The method as described in claim 2, characterized in that, The step of calculating the estimated peak temperature of the target region of the target component in a non-cooled state after shutdown, based on the temperature characterization value, the preset initial temperature of the target region of the target component, and the preset heat transfer coefficient, includes: A preset heat transfer function model is invoked, and the temperature characterization value is used as the body reference temperature of the target component. Combined with the preset initial temperature, the preset heat transfer coefficient, and the preset time limit, the highest temperature that the target area can reach within the preset time limit is calculated as the estimated peak temperature.

4. The method as described in claim 3, characterized in that, The target component is the turbocharger, and the target area of ​​the target component is the turbocharger bearing; the heat transfer function model is used to characterize the process of heat transfer from the turbocharger housing to the turbocharger bearing when the coolant stops flowing.

5. The method as described in claim 2, characterized in that, The step of calculating the target cooling time based on the difference between the estimated peak temperature and the set safe temperature, the real-time temperature of the cooling medium, and the preset flow rate includes: The preset cooling efficiency model is invoked, and the difference between the estimated peak temperature and the set safe temperature is used as the reference value of the heat dissipation. Combined with the real-time temperature of the cooling medium, the preset flow rate, and the preset heat absorption coefficient, the heat exchange time required to eliminate the reference value of the heat dissipation is calculated as the target cooling time.

6. The method as described in claim 1, characterized in that, The operating parameters include the rotational speed and load of the power equipment. Based on these operating parameters, the temperature characterization value of the target component is calculated, including: Based on the rotational speed and load of the power equipment, and according to the preset relationship between rotational speed, load and temperature, the temperature characterization value of the target component is obtained.

7. The method as described in claim 1, characterized in that, The cumulative runtime is obtained by accumulating the duration during which the temperature characterization value exceeds a preset first load threshold, including: The cumulative runtime is obtained by accumulating the duration for which the temperature characterization value exceeds the preset first load threshold; when the duration for which the temperature characterization value is lower than the preset second load threshold exceeds a set reset duration threshold, the cumulative runtime is reset to zero; wherein, the preset second load threshold is lower than the first load threshold.

8. A cooling control system for power equipment, characterized in that, The power equipment also includes a target component driven by the power equipment and a heating device. The heating device includes a water pump and heating functional components. The water pump is located in the cooling circuit of the power equipment and can be operated independently under control. The system includes: The parameter calculation module is used to acquire the operating parameters of the power equipment in real time, calculate the temperature characterization value of the target component based on the operating parameters, and accumulate the duration for which the temperature characterization value exceeds a preset first load threshold to obtain the cumulative running time. The cooling time calculation module is used to calculate the target cooling time required for the target component to reach the set safe temperature based on the temperature characterization value in response to the shutdown of the power equipment and the cumulative running time exceeding the set time threshold. The control module is used to control the water pump to run for the target cooling time, so as to drive the cooling medium to cool the target component, and to control the heating function component of the heating device to stop working.

9. An electronic device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor, when running the computer program, performs an action to implement the method as claimed in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, It stores computer-readable instructions that can be executed by a processor to implement the method as described in any one of claims 1-7.

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