Control method, controller and system of engine oil thermal management system

Abstract

The invention provides a control method, a controller and a system of an engine oil heat management system, and relates to the technical field of engines. The method comprises the steps that when the engine oil temperature of the oil pan is lower than a first temperature threshold value, the heating device is controlled to be started, and engine oil of the oil pan is heated; and on the basis of the engine oil temperature and the operation working condition of the engine, the working state of a bypass device and the flow proportion of engine oil distributed to the cooling component and the lubricating component by the engine oil flow distribution device are controlled. According to the method, when the engine is in a low-load working condition and the engine oil temperature is relatively low, excessive heat dissipation of engine oil entering the engine oil cooler can be stopped, meanwhile, the flow of the engine oil entering the cooling component and the lubricating component can be adjusted, and heat loss caused when the cooling component is still cooled at low temperature or low power consumption is avoided; the cold start performance of an engine is improved, the warm-up time is shortened, and emission and oil consumption are reduced at the same time.

Description

Technical Field

[0001] The present application relates to the field of engine technology, and in particular to a control method, controller and system for an engine oil thermal management system. Background Art

[0002] As the global energy crisis intensifies and environmental regulations become increasingly stringent, thermal management technology for diesel engines has become a key breakthrough in improving energy efficiency and reducing emissions. The current mainstream solutions in the industry generally focus on the intelligent control of the coolant system. Through the synergy of the electronic thermostat, electronic water pump and modular thermal management system, precise control of the engine operating temperature can be achieved.

[0003] The structural combination of the above-mentioned electronic thermostat and electronic water pump is mainly used to achieve indirect temperature control of the coolant-oil heat exchanger. The design of the heat exchanger in this technology is limited by the spatial layout and heat dissipation efficiency. Under low-temperature startup or transient conditions, the temperature difference gradient between the coolant and the oil can easily cause local overheating or overcooling, forcing the system to frequently start the auxiliary heating / cooling device, further aggravating energy consumption. Summary of the invention

[0004] The present application provides a control method, a controller and a system for an engine oil thermal management system to solve the problem of high energy consumption of oil thermal management in the prior art.

[0005] In a first aspect, the present application provides a control method for an engine oil thermal management system, the engine oil thermal management system comprising an oil pan, a heating device, a bypass device, an oil cooler, an oil flow distribution device, a cooling component and a lubricating component; the oil pan is connected to an input end of the bypass device; an output end of a main pipeline of the bypass device is connected to an input end of the oil cooler; an output end of the oil cooler and a bypass pipeline of the bypass device are respectively connected to an input end of the oil flow distribution device; an output end of the oil flow distribution device is respectively connected to the lubricating component and the cooling component; the heating device is used to heat the oil in the oil pan;

[0006] The method comprises:

[0007] When the temperature of the engine oil in the oil pan is lower than a first temperature threshold, controlling the heating device to start and heat the engine oil in the oil pan;

[0008] Based on the oil temperature and the operating condition of the engine, the working state of the bypass device and the oil flow ratio distributed by the oil flow distribution device to the cooling component and the lubricating component are controlled.

[0009] It can be seen from the above embodiments that the control method of the above engine oil thermal management system can flexibly adjust the flow direction and flow rate of the oil according to the engine operating conditions and oil temperature, and can stop the oil from entering the oil cooler for excessive heat dissipation when the engine is under low load and the oil temperature is relatively low. At the same time, the oil flow rate entering the cooling components and lubricating components can be adjusted to reduce the heat loss caused by cooling the cooling components at low temperatures or low power consumption, so as to improve the cold start performance of the engine, reduce the warm-up time, and achieve simultaneous reduction of emissions and fuel consumption. At the same time, the oil saved by the cooling components can be allocated to the lubricating components, thereby improving the oil utilization rate, or reducing the total fuel consumption on the basis of keeping the oil flow rate allocated to each lubricating component unchanged.

[0010] In a possible implementation, controlling the working state of the bypass device based on the oil temperature and the operating condition of the engine includes:

[0011] If the oil temperature is lower than a preset temperature value and the engine is in a corresponding operating condition, the main pipeline of the bypass device is controlled to be connected and the bypass pipeline is controlled to be closed.

[0012] It can be seen from the above embodiments that when the oil temperature is not high and the corresponding engine load does not cause the oil temperature to rise rapidly to the upper temperature limit, the oil cooler is no longer used to cool the oil, thereby rationally utilizing the heat generated by the engine combustion, thereby achieving the purpose of shortening the cold start and warm-up time and reducing the overall fuel consumption of the engine.

[0013] In a possible implementation, the preset temperature value includes a third temperature threshold, a fourth temperature threshold and a fifth temperature threshold; the operating condition of the engine includes a low load condition, a medium load condition and a high load condition;

[0014] If the oil temperature is lower than a preset temperature value and the engine is in a corresponding operating condition, controlling the main pipeline of the bypass device to be turned on and the bypass pipeline to be turned off includes:

[0015] If the engine is in a low-load condition and the engine oil temperature is less than a third temperature threshold, the bypass pipeline of the bypass device is controlled to be connected and the main pipeline is closed;

[0016] If the engine is in a medium load condition and the engine oil temperature is less than a fourth temperature threshold, the bypass pipeline of the bypass device is controlled to be connected and the main pipeline is closed;

[0017] If the engine is in a high-load condition and the engine oil temperature is less than a fifth temperature threshold, the bypass pipeline of the bypass device is controlled to be connected and the main pipeline is closed;

[0018] The third temperature threshold is lower than the first temperature threshold and higher than the fourth temperature threshold, and the fourth temperature threshold is higher than the fifth temperature threshold.

[0019] It can be seen from the above embodiments that the above method, by setting a variety of conduction conditions for the bypass pipe of the bypass device, can avoid using the oil cooler for cooling as much as possible when the oil does not need to be cooled, thereby reducing the time required for the oil to heat up, maintaining the oil temperature at a high level, and reducing friction losses under cold start and warm-up conditions.

[0020] In a possible implementation, controlling the oil flow ratio of the oil flow distribution device to the cooling component and the lubricating component based on the oil temperature and the operating condition of the engine includes:

[0021] If the oil temperature is lower than a preset temperature value and the engine is in a corresponding operating condition, the oil flow distribution device is controlled to reduce the oil flow ratio of the cooling component and increase the oil flow ratio of the lubricating component.

[0022] It can be seen from the above embodiments that the above method can reduce the cooling oil flow entering the cooling components and increase the oil flow of the lubricating components when the oil does not need to be cooled, without using an oil cooler to cool the oil, thereby reducing the heat loss of the oil during cold start and warm-up stages, reducing the energy consumption of the engine oil thermal management system, and at the same time, by increasing the oil flow of the lubricating components, it can improve the lubrication effect of the lubricating components and improve the oil utilization rate.

[0023] In a possible implementation, the oil flow distribution device includes an electromagnetic switch valve; the input end of the electromagnetic switch valve is connected to the output end of the oil cooler, and the output end of the electromagnetic switch valve is connected to the cooling component; the cooling component includes a piston cooling nozzle;

[0024] If the oil temperature is lower than a preset temperature value and the engine is in a corresponding operating condition, the oil flow distribution device is controlled to reduce the oil flow ratio of the cooling component, including:

[0025] If the engine is in a low-load condition and the engine oil temperature is less than a third temperature threshold, the electromagnetic switch valve is controlled to be turned off; otherwise, the electromagnetic switch valve is controlled to be turned on;

[0026] If the engine is in a medium load condition and the engine oil temperature is lower than a fourth temperature threshold, the electromagnetic switch valve is controlled to be turned off; otherwise, the electromagnetic switch valve is controlled to be turned on;

[0027] If the engine is in a high-load condition and the engine oil temperature is less than a fifth temperature threshold, the electromagnetic switch valve is controlled to be turned off; otherwise, the electromagnetic switch valve is controlled to be turned on;

[0028] The third temperature threshold is lower than the first temperature threshold and higher than the fourth temperature threshold, and the fourth temperature threshold is higher than the fifth temperature threshold.

[0029] It can be seen from the above embodiments that the above method can control the oil cooler to be closed and the cooling component to be closed when the oil temperature is low or the engine load is small, thereby further reducing the time required for the oil to heat up and maintaining the oil temperature at a higher level.

[0030] In a possible implementation, the lubrication component includes a plurality of;

[0031] If the oil temperature is less than a preset temperature value and the engine is in a corresponding operating condition, increasing the oil flow rate ratio of the lubricating component includes:

[0032] If the engine is in a low-load condition and the engine oil temperature is less than a third temperature threshold, the engine oil flow distribution device is controlled to distribute the inflowing engine oil to each lubricating component according to a first flow distribution ratio;

[0033] If the engine is in a medium load condition and the oil temperature is less than a fourth temperature threshold, the oil flow distribution device is controlled to distribute the inflowing oil to each lubricating component according to a second flow distribution ratio;

[0034] If the engine is in a high-load condition and the oil temperature is less than a fifth temperature threshold, the oil flow distribution device is controlled to distribute the inflowing oil to each lubricating component according to a third flow distribution ratio;

[0035] The third temperature threshold is lower than the first temperature threshold and higher than the fourth temperature threshold, and the fourth temperature threshold is higher than the fifth temperature threshold.

[0036] The above method can distribute flow to each lubricating component as needed based on the oil temperature and engine operating conditions, thereby reducing the total flow demand of the oil pump and improving oil utilization while ensuring that the friction loss of each lubricating component is small.

[0037] In a possible implementation, the oil flow distribution device includes a multi-way electromagnetic proportional valve; controlling the oil flow distribution device to distribute the inflowing oil to each lubricating component according to a first flow distribution ratio includes:

[0038] Determine the target opening of the electromagnetic proportional valve corresponding to each lubrication component based on the first flow distribution ratio;

[0039] Adjust the opening of the electromagnetic proportional valve of each lubrication component to its corresponding target opening.

[0040] In a possible implementation, after controlling the heating device to start, the method further includes:

[0041] When the oil temperature of the oil pan is higher than a second temperature threshold, the heating device is controlled to stop working.

[0042] In a second aspect, the present application provides a controller comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the method described in the possible implementation manner of the first aspect are implemented.

[0043] In a third aspect, the present application provides an engine oil thermal management system, comprising the controller as described in the second aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0045] Figure 1 is a schematic diagram of the structure of an engine oil thermal management system provided by an embodiment of the present application;

[0046] Figure 2 is a schematic diagram of the specific structure of the engine oil thermal management system provided by the embodiment of the present application;

[0047] Figure 3 is a flow chart for implementing a control method of an engine oil thermal management system provided by an embodiment of the present application;

[0048] Figure 4 is a schematic diagram of an external characteristic curve of an engine provided in an embodiment of the present application;

[0049] Figure 5 is a structural schematic diagram of a control device for an engine oil thermal management system provided in an embodiment of the present application;

[0050] Figure 6 It is a schematic diagram of a controller provided in an embodiment of the present application. DETAILED DESCRIPTION

[0051] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0052] In order to make the purpose, technical solutions and advantages of the present application clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

[0053] During engine operation, the heat generated by friction and combustion heat is transferred through the engine oil, and the engine oil temperature directly affects the lubrication performance and system reliability. When the engine oil temperature exceeds a certain value, its oxidation rate significantly accelerates, and the viscosity index decreases, resulting in a decrease in the oil film's carrying capacity; while in a low temperature environment, the engine oil viscosity increases sharply and the oil pump power consumption increases. Studies have shown that for every 10°C increase in engine oil temperature, engine friction losses decrease by 7-10%, but overcooling will lead to heat waste. Therefore, building an efficient and accurate engine oil thermal management system is crucial to improving fuel economy and emission performance.

[0054] At present, the oil thermal management usually adopts the coolant-oil indirect heat exchange technology, and the electronic thermostat and the electronic water pump cooperate to control the coolant flow, thereby adjusting the oil temperature. This solution has problems such as limited heat exchange efficiency, delayed dynamic response, and extensive flow distribution, which leads to low engine thermal management efficiency and excessive energy consumption.

[0055] In response to the above-mentioned problems of low engine thermal management efficiency and high energy consumption, the present application proposes a control method for an engine oil thermal management system. Through the three-dimensional thermal management system of "direct heating + dynamic bypass + intelligent distribution", the thermal management efficiency of the engine can be improved and the energy consumption can be reduced.

[0056] Figure 1 is a schematic diagram of the structure of the engine oil thermal management system provided by the embodiment of the present application, such as Figure 1 As shown, the system includes: an oil pan 40, a heating device 10, a bypass device 20, an oil cooler 80, an oil flow distribution device 30, a cooling component 50 and a lubricating component 200; the oil pan 40 is connected to the input end of the bypass device 20; the output end of the main pipeline of the bypass device 20 is connected to the input end of the oil cooler 80; the output end of the oil cooler 80 and the bypass pipeline of the bypass device 20 are respectively connected to the input end of the oil flow distribution device 30; the output end of the oil flow distribution device 30 is respectively connected to the lubricating component 200 and the cooling component 50; the heating device 10 is used to heat the oil in the oil pan 40.

[0057] Specifically, the engine oil pan 40 is a sealed container located at the bottom of the engine, which is used to store engine oil and provide a stable oil source for the lubrication system.

[0058] The heating device 10 is an electric heating element installed inside or outside the engine oil pan 40, and can adopt PTC ceramic heating or resistance wire heating to ensure that the viscosity of the engine oil is reduced to a flowable state in a low temperature environment.

[0059] The bypass device 20 is a flow switching device based on a three-way solenoid valve, comprising a main pipeline and a bypass pipeline. The main pipeline is connected to the oil cooler 80, and the bypass pipeline can be directly connected to the control valve 30 of the lubrication component. The cooling demand is adjusted by switching the main and auxiliary oil circuits, and the oil flow path can be changed according to the control signal.

[0060] The oil cooler 80 is a device that lowers the temperature of the oil by exchanging coolant or air.

[0061] Specifically, the cooling component 50 may be a cooling component such as a piston cooling nozzle, an oil spray cooling hole on the top of the piston, etc., and the lubricating component 200 may include a cylinder lubricating component 202 and a cylinder head lubricating component 201 .

[0062] The oil flow distribution device 30 is used to distribute the oil flow ratio entering the lubricating component and the cooling component.

[0063] In one possible implementation, Figure 2 As shown, the engine oil thermal management system further includes an oil collector 60 , an oil pump 70 and an oil filter 90 .

[0064] The outlet of the oil pan 40 is communicated with the inlet of the oil collector 60, and the outlet of the oil collector 60 is communicated with the inlet of the oil pump 70; the outlet of the oil pump 70 is communicated with the inlet of the bypass device. The inlet of the oil filter 90 is communicated with the bypass pipe outlets of the oil cooler 80 and the bypass device 20 respectively, and the outlet of the oil filter 90 is connected to the oil flow distribution device 30.

[0065] In this embodiment, the oil collector 60 is a mesh filter device located at the bottom of the oil pan 40 and at the end of the oil suction pipe connected to the oil pump 70, which is used to initially filter large particles of impurities in the oil to prevent them from entering the oil pump 70 and the lubrication system. It is composed of a metal filter and an oil suction pipe. The filter has a large aperture and mainly intercepts large foreign matter. The oil pump 70 is a core component of the engine lubrication system. It is responsible for pressurizing and delivering the oil from the oil pan 40 to the various friction surfaces of the engine, establishing and maintaining the oil pressure, ensuring that the oil can reach the high-speed moving parts such as the crankshaft, camshaft, and piston, and providing lubrication, cooling and cleaning for the engine through continuous circulation. The oil filter 90 is a filtering device installed in the engine lubrication system, which is used to remove impurities such as metal debris, carbon deposits, and colloids carried by the oil during the circulation process, keep the oil clean, and prevent particles from wearing the internal parts of the engine (such as bearings, cylinder walls, etc.). It is usually composed of a metal shell, filter paper (or synthetic fiber filter material) and a bypass valve. When the filter element is blocked, the bypass valve will open to ensure the circulation of the oil.

[0066] In one embodiment, the lubricating components include a cylinder lubricating component 201 and a cylinder head lubricating component 202, wherein the cylinder lubricating component 201 includes a vacuum pump, a timing system, a cam journal and a hydraulic tappet, and the cylinder head lubricating component 202 includes a high-pressure oil pump, a balance shaft, a supercharger, a connecting rod journal and a main journal.

[0067] In this embodiment, the oil flow distribution device may include an electromagnetic switch valve and a multi-way electromagnetic proportional valve, wherein the input end of the electromagnetic switch valve is connected to the output end of the oil cooler, and the output end of the electromagnetic switch valve is connected to the cooling component; the inlet of the multi-way electromagnetic proportional valve is connected to the oil cooler and the bypass pipe of the bypass device, and each outlet is respectively connected to the corresponding lubrication component.

[0068] Specifically, the multi-way electromagnetic proportional valve may be a four-way valve, such as Figure 2 As shown, one of the output ports is connected to the cylinder oil main pipeline, which is connected to the branch pipelines of each cylinder lubricating component 201; the other output port is connected to the cylinder head oil main pipeline, which is connected to the branch pipelines of each cylinder head lubricating component 202, and the outlets of the lubricating pipelines of each lubricating component are connected to the oil pan.

[0069] As another embodiment, the number of proportional valves in a multi-way solenoid proportional valve can also be determined based on the number of specific lubrication components. Each proportional valve port is directly connected to the branch oil pipeline of the corresponding lubrication component, thereby being able to accurately control the oil flow of each lubrication component and further improve oil utilization.

[0070] In one embodiment, the engine oil thermal management system may further include a controller for controlling the working state of the bypass device and controlling the oil flow distribution device to distribute oil to the cooling component and the lubricating component.

[0071] Specifically, the controller may be an on-board controller or an off-board controller, or a combination of an on-board controller and an off-board controller. When it is an on-board controller, the controller may specifically be an engine controller.

[0072] Based on the above engine oil thermal management system, the present application provides a control method for the engine oil thermal management system, and the execution subject of the method may be the controller of the above engine oil thermal management system. Figure 2 , Figure 2 The following is a flowchart of the control method of the engine oil thermal management system, and the process is described in detail as follows:

[0073] S101: When the temperature of the engine oil in the oil pan is lower than a first temperature threshold, control the heating device to start heating the engine oil in the oil pan.

[0074] In this embodiment, when the oil temperature of the oil pan 40 is lower than the first temperature threshold, it means that the external environment is a low temperature environment and the engine is in a cold start or warm-up stage. At this time, the oil in the oil pan 40 can be heated by starting the heating device 10.

[0075] S102: Based on the oil temperature and the operating condition of the engine, controlling the working state of the bypass device and the oil flow ratio distributed by the oil flow distribution device to the cooling component and the lubrication component.

[0076] In this embodiment, when the oil temperature is low or the engine load is small, such as low temperature cold start, warm-up, small load or shutdown stage, the controller can control the main pipeline of the bypass device 20 to be closed, the bypass pipeline is connected, and the oil cooler 80 is no longer used to cool the oil, so as to reasonably utilize the heat generated by engine combustion, reduce heat loss, shorten the time of cold start, warm-up and shutdown, and avoid waste of cold capacity. At the same time, the oil flow ratio of the cooling component and the lubricating component can be adjusted, and the oil flow of the cooling component is reduced in the cold start and warm-up stage to avoid heat loss, increase or maintain the original oil flow entering the lubricating component, thereby reducing oil consumption on the basis of ensuring the lubrication effect of the lubricating component. When the oil temperature of the oil pan 40 is high and the engine load is large, the bypass device 20 needs to open the main pipeline to allow the oil to enter the oil cooler 80 for cooling and reduce the oil temperature.

[0077] The bypass device 20 may include two solenoid valves, which are respectively arranged in the main pipeline and the bypass pipeline, and are used to control the oil flow that needs to be cooled and the oil flow that does not need to be cooled. On this basis, the controller controls the opening of the solenoid valve in the main pipeline and the opening of the solenoid valve in the bypass pipeline in the bypass device 20 based on the oil temperature and the engine working condition, so that the oil temperature quickly enters the preset temperature range. Exemplarily, the sum of the opening of the solenoid valve in the main pipeline and the opening of the solenoid valve in the bypass pipeline is 1. When the oil temperature is less than the preset temperature value and the engine is in a relatively low load operating condition, the opening of the solenoid valve in the bypass pipeline is greater than the opening of the solenoid valve in the main pipeline. When the oil temperature is greater than the preset temperature value and the engine is in a high load operating condition, the opening of the solenoid valve in the bypass pipeline is less than the opening of the solenoid valve in the main pipeline, so as to meet the oil temperature and flow rate in the corresponding suitable range and reduce the fluctuation of the oil temperature.

[0078] It can be seen from the above embodiments that the control method of the above engine oil thermal management system flexibly adjusts the flow direction and flow rate of the oil according to the engine operating conditions and oil temperature, and can stop the oil from entering the oil cooler for excessive heat dissipation when the engine is under low load and the oil temperature is relatively low. At the same time, the oil flow rate entering the cooling components and lubricating components can be adjusted to avoid heat loss, thereby improving the engine cold start performance, reducing the warm-up time, and achieving simultaneous reductions in emissions and fuel consumption. When the engine is under high load and the oil temperature is relatively high, the oil cooler is used to dissipate the oil in a timely manner to ensure the safe operation of the engine.

[0079] In a possible implementation, the specific implementation process of controlling the working state of the bypass device based on the oil temperature and the operating condition of the engine in S102 includes:

[0080] If the oil temperature is lower than a preset temperature value and the engine is in a corresponding operating condition, the main pipeline of the bypass device is controlled to be connected and the bypass pipeline is controlled to be closed.

[0081] Specifically, the working state of the bypass device includes the state where the main pipeline is connected and the bypass pipeline is closed, and the state where the main pipeline is closed and the bypass pipeline is connected. When the oil temperature is less than the preset temperature value, it means that the heat generated by the engine is not high at this time. If the load of the engine is not high, it means that the engine is in a low power consumption state, the current oil temperature and viscosity are appropriate, and the engine can work well without the oil cooler 80 cooling the oil.

[0082] Illustratively, in this embodiment, a correspondence table of oil temperature, engine operating conditions and the working state of the bypass device 20 can be set in advance, and the controller determines the working state of the bypass device 20 corresponding to different oil temperatures and engine operating conditions by looking up the table.

[0083] In this embodiment, the low power consumption condition may be a condition where the engine speed is less than a preset speed value, or a condition where the load is less than a preset load value. Since the oil heat dissipation efficiency and the engine heat load vary significantly under different environmental conditions, differentiated control strategies are required, so the preset temperature value may be determined based on the environmental information of the vehicle. The environmental information includes ambient temperature and / or altitude data.

[0084] Specifically, the controller can identify the current external ambient temperature of the vehicle through the ambient temperature sensor, and obtain the altitude data of the vehicle through the air pressure sensor or GPS altitude data, and then determine the corresponding preset temperature value based on the external ambient temperature and / or altitude data.

[0085] Specifically, the external environment temperature is positively correlated with the preset temperature value. After the preset temperature value is determined based on the external environment temperature, if the vehicle is in a plateau area, the preset temperature value obtained based on the external environment temperature is reduced by a first temperature value to correct the preset temperature value in the plateau area. The first temperature value is a positive value.

[0086] The specific method for determining the preset temperature value based on the external ambient temperature is as follows: based on the formula Tset = Tbase + k*(Tambient - Tref) calculates a preset temperature value, wherein Tset represents the preset temperature value, Tbase represents the base temperature value, Tref represents the reference ambient temperature, and Tambient represents the external ambient temperature.

[0087] It can be seen from the above embodiments that when the oil temperature is not high and the corresponding engine load will not cause the oil temperature to rise rapidly to the upper temperature limit, the oil cooler will no longer be used to cool the oil, thereby rationally utilizing the heat generated by the engine combustion to achieve the purpose of shortening the cold start and warm-up time and reducing the overall engine fuel consumption.

[0088] In a possible implementation, the preset temperature value includes a third temperature threshold, a fourth temperature threshold and a fifth temperature threshold; the operating condition of the engine includes a low load condition, a medium load condition and a high load condition; in S102, if the oil temperature is less than the preset temperature value and the engine is in the corresponding operating condition, the specific implementation process of controlling the main pipeline of the bypass device to be turned on and the bypass pipeline to be turned off includes:

[0089] If the engine is in a low-load condition and the engine oil temperature is less than a third temperature threshold, the bypass pipeline of the bypass device is controlled to be connected and the main pipeline is closed;

[0090] If the engine is in a medium load condition and the engine oil temperature is less than a fourth temperature threshold, the bypass pipeline of the bypass device is controlled to be connected and the main pipeline is closed;

[0091] If the engine is in a high-load condition and the engine oil temperature is less than a fifth temperature threshold, the bypass pipeline of the bypass device is controlled to be connected and the main pipeline is closed;

[0092] The third temperature threshold is lower than the first temperature threshold and higher than the fourth temperature threshold, and the fourth temperature threshold is higher than the fifth temperature threshold.

[0093] In this embodiment, the controller may determine the operating condition of the engine based on the engine speed and load, and may also determine the operating condition of the engine based on the type of road the vehicle is traveling on and the vehicle speed.

[0094] Specifically, when the operating condition of the engine is determined based on the engine speed and load, the smaller the engine load or the smaller the engine speed, the higher the oil temperature threshold at which the oil cooler 80 can be turned on to cool the oil. Therefore, the third temperature threshold is greater than the fourth temperature threshold, which is greater than the fifth temperature threshold, and the third temperature threshold, the fourth temperature threshold and the fifth temperature threshold are all less than the first temperature threshold.

[0095] In a possible implementation manner, the process of obtaining the first temperature threshold, the third temperature threshold, the fourth temperature threshold, and the fifth temperature threshold is described in detail as follows:

[0096] Obtaining the saved initial first temperature threshold, third temperature threshold, fourth temperature threshold and fifth temperature threshold; wherein the third temperature threshold is less than the first temperature threshold and greater than the fourth temperature threshold, and the fourth temperature threshold is greater than the fifth temperature threshold;

[0097] The dielectric constant of the oil in the oil pan is obtained based on a dielectric constant sensor, and a temperature change value is calculated according to the dielectric constant; the dielectric constant is positively correlated with the temperature change value, and the temperature change value is a positive value;

[0098] The temperature change value is added to the initial first temperature threshold, the third temperature threshold, the fourth temperature threshold and the fifth temperature threshold to obtain the revised first temperature threshold, the third temperature threshold, the fourth temperature threshold and the fifth temperature threshold.

[0099] In the present embodiment, the dielectric constant is a measure of the polarization ability of a substance in an electric field, reflecting its ability to store electrical energy. The dielectric constant of different substances or the same substance under different conditions (such as temperature and pollution level changes) will change. Specifically, after long-term use of engine oil, the base oil and additives are oxidized to generate acidic substances, colloids, etc., and the polar molecules increase, resulting in an increase in the dielectric constant. In addition, engine oil contamination (such as mixing with water, coolant or metal particles) will affect the dielectric constant and viscosity at the same time. For example, after the coolant is mixed into the engine oil, the dielectric constant increases significantly, and the viscosity also increases due to emulsification. Similarly, pollutants such as iron powder may also change the two synchronously by changing the composition of the engine oil. Therefore, when the dielectric constant increases, it means that the viscosity of the engine oil increases, and the increase in the viscosity of the engine oil will affect the lubrication effect, so it is necessary to further shorten the cold start and warm-up time so that the engine oil temperature rises quickly to the normal temperature range.

[0100] Based on the above principle, the present embodiment obtains the dielectric constant of the oil in the oil pan 40 through a dielectric constant sensor. If the difference between the actual dielectric constant and the initial dielectric constant is greater than a preset constant threshold, the temperature change value is determined based on the dielectric constant, that is, the larger the dielectric constant, the larger the temperature change value, thereby increasing each temperature threshold and delaying the start time of the oil cooler 80 under warm-up, cold start, low load, shutdown and other working conditions to reduce oil heat loss, shorten warm-up time, reduce oil viscosity, and further improve oil utilization.

[0101] In one embodiment, when determining the operating condition of the engine based on the road type and vehicle speed of the vehicle, the specific implementation process is as follows:

[0102] If the vehicle is on an urban road and the vehicle speed is lower than a first preset vehicle speed, determining that the engine is in a low-load operating condition;

[0103] If the vehicle is on a highway and the road gradient is less than a first ramp threshold, determining that the engine is in a medium load condition;

[0104] If the vehicle is loaded with a load greater than a preset load threshold and the road roughness is greater than a first slope threshold, it is determined that the engine is in a high-load condition;

[0105] If the acceleration of the vehicle is greater than a preset acceleration, it is determined that the engine is in a high-load condition.

[0106] First, the vehicle controller can obtain a road surface image of the road to be driven on through the vehicle camera, and identify the road surface image to determine the road surface type of the road to be driven on, which includes urban roads, township roads and highways. As another embodiment, the vehicle controller can also obtain the road type of the vehicle driving road through navigation. After obtaining the road type, the vehicle controller sends the road type to the engine controller, and the engine controller determines the above operating conditions based on the road type.

[0107] Secondly, the engine controller can obtain the inclination angle (road slope) of the road where the vehicle is located through the inclination angle sensor / acceleration sensor, and determine the size relationship between the inclination angle and the first ramp threshold. When the inclination angle is greater than zero and less than the first ramp threshold, it means that the vehicle is driving on a medium slope and the engine load is medium. If the inclination angle is greater than the first preset angle threshold, it means that the vehicle is driving on a steep slope and the engine load is high. Exemplarily, the first preset angle threshold can be 10 degrees to 20 degrees.

[0108] It can be seen from the above embodiments that the above method, by setting a variety of conduction conditions for the bypass pipe of the bypass device, can avoid using the oil cooler for cooling as much as possible when the oil does not need to be cooled, thereby reducing the time required for the oil to heat up, maintaining the oil temperature at a high level, and reducing friction losses under cold start and warm-up conditions.

[0109] In a possible implementation, when determining the operating condition of the engine based on the engine speed and load, the specific implementation process is as follows:

[0110] If the speed of the engine is less than or equal to a first speed threshold, and the engine load is less than or equal to a first load threshold, it is determined that the engine is in a low-load condition;

[0111] If the engine speed is greater than the first speed threshold and less than or equal to the second speed threshold, and the engine load is less than or equal to the second load threshold, it is determined that the engine is in a medium load condition;

[0112] If the engine speed is greater than the second speed threshold, and the engine load is greater than the second load threshold, it is determined that the engine is in a high load condition;

[0113] The first load threshold is smaller than the second load threshold; the first speed threshold is smaller than the second speed threshold.

[0114] In this embodiment, Figure 4 The external characteristic curve diagram of the engine provided in this embodiment is shown as follows: Figure 4As shown in the figure, the graph shows the relationship between engine speed, oil temperature and BMEP (Brake Mean Effective Pressure); BMEP represents the mean effective pressure per unit cylinder volume generated by the engine in the "braking" (i.e. output power) state. It is a key indicator for measuring engine efficiency and power output, and reflects the ability to convert the energy generated by fuel combustion into effective work. Therefore, this embodiment can determine the load condition of the engine based on the engine speed and load. Reference Figure 4 When the engine speed is less than the first speed threshold and the engine load is less than the first load threshold, the BMEP is less than A1, and the engine is in a low-load condition. When the engine speed is greater than the first speed threshold and less than or equal to the second speed threshold, and the engine load is less than the second load threshold, the BMEP is greater than A1 and less than A3, and the engine is in a medium-load condition. When the engine speed is greater than the second speed threshold and the engine load is greater than the second load threshold, the BMEP is greater than A3, and the engine is in a high-load condition.

[0115] In this embodiment, in order to avoid the hysteresis of load change, this embodiment can also predict the load condition of the engine at the next moment based on the load condition and load change rate at the current moment. For example, if the load condition at the current moment is a low load condition, and the historical load change rate at the current moment is greater than the first change rate threshold, the operating condition at the next moment is a medium load condition, otherwise it is still a low load condition; similarly, if the load condition at the current moment is a medium load condition, and the historical load change rate at the current moment is greater than the first change rate threshold, the operating condition at the next moment is a high load condition, otherwise it is still a medium load condition. Under the opposite change path, if the load condition at the current moment is a high load condition, and the historical load change rate at the current moment is less than the second change rate threshold, the operating condition at the next moment is a medium load condition, otherwise it is still a high load condition; similarly, if the load condition at the current moment is a medium load condition, and the historical load change rate at the current moment is less than the second change rate threshold, the operating condition at the next moment is a low load condition, otherwise it is still a medium load condition. The first change rate threshold is a positive value, and the second change rate threshold is a negative value.

[0116] By predicting the engine's future operating conditions through the historical load change rate, the working state of the bypass device 20 and the working state of the oil flow distribution device 30 can be adjusted in advance, further reducing heat loss, shortening warm-up and cold start time, and improving oil utilization.

[0117] In this embodiment, another implementation process of determining the engine operating condition based on the engine speed and the engine load includes:

[0118] If the speed of the engine is less than or equal to a first speed threshold, and the engine load is less than or equal to a first load threshold, it is determined that the engine is in a low-load condition;

[0119] If the speed of the engine is less than or equal to the second speed threshold, and the engine load is greater than the first load threshold and less than or equal to the second load threshold, it is determined that the engine is in a medium load condition;

[0120] If the engine speed is greater than a second speed threshold, and the engine load is greater than a first load threshold and less than or equal to a second load threshold, it is determined that the engine is in a medium load condition;

[0121] If the engine speed is greater than the second speed threshold and the engine load is greater than the second load threshold, it is determined that the engine is in a high load condition.

[0122] In a possible implementation, the specific implementation process of controlling the oil flow ratio of the oil flow distribution device to the cooling component and the lubricating component based on the oil temperature and the operating condition of the engine in S102 includes:

[0123] If the oil temperature is lower than a preset temperature value and the engine is in a corresponding operating condition, the oil flow distribution device is controlled to reduce the oil flow ratio of the cooling component and increase the oil flow ratio of the lubricating component.

[0124] In this embodiment, when the oil temperature is lower than a preset temperature value and the engine is in a corresponding operating condition, that is, based on the current oil temperature and the engine operating condition, it can be determined that the oil temperature will not quickly rise to the upper temperature limit, that is, the oil temperature will be in a normal temperature range in the last few cycles. At this time, there is no need to quickly cool down some engine components to be cooled (such as pistons), so the flow of oil entering the cooling components can be reduced. At the same time, under the same engine operating condition, when the amount of oil pumped out by the oil pump remains unchanged, as the oil flow entering the cooling components decreases, the controller can also control the oil flow distribution device to increase the proportion of oil flow entering the lubrication components, thereby improving the oil utilization rate and the lubrication effect of the lubrication components.

[0125] On the other hand, the controller can also determine the amount of oil pumped out based on parameters such as engine operating conditions, speed, and oil temperature. When it is determined that the oil temperature is lower than the preset temperature value and the engine is in the corresponding operating condition, the total oil pumping volume of the oil pump is reduced, and the oil flow entering the cooling components is reduced. The reduced total oil volume is fully distributed to each lubrication component to meet the oil flow requirements of the lubrication components and achieve the effect of saving fuel consumption.

[0126] It can be seen from the above embodiments that the above method can reduce the cooling oil flow entering the cooling components and increase the oil flow of the lubricating components when the oil does not need to be cooled, without using an oil cooler to cool the oil, thereby reducing the heat loss of the oil during cold start and warm-up stages, reducing the energy consumption of the engine oil thermal management system, and at the same time, by increasing the oil flow of the lubricating components, it can improve the lubrication effect of the lubricating components and improve the oil utilization rate.

[0127] In a possible implementation, if the oil temperature is less than a preset temperature value and the engine is in a corresponding operating condition, the specific implementation process of controlling the oil flow distribution device to reduce the oil flow ratio of the cooling component includes:

[0128] If the engine is in a low-load condition and the engine oil temperature is less than a third temperature threshold, the electromagnetic switch valve is controlled to be turned off; otherwise, the electromagnetic switch valve is controlled to be turned on;

[0129] If the engine is in a medium load condition and the engine oil temperature is lower than a fourth temperature threshold, the electromagnetic switch valve is controlled to be turned off; otherwise, the electromagnetic switch valve is controlled to be turned on;

[0130] If the engine is in a high-load condition and the engine oil temperature is less than a fifth temperature threshold, the electromagnetic switch valve is controlled to be turned off; otherwise, the electromagnetic switch valve is controlled to be turned on;

[0131] The third temperature threshold is lower than the first temperature threshold and higher than the fourth temperature threshold, and the fourth temperature threshold is higher than the fifth temperature threshold.

[0132] In this embodiment, if the engine is in a low-load condition and the oil temperature is less than the third temperature threshold, the solenoid switch valve is controlled to be closed, and the supply of oil to the piston cooling nozzle 50 is stopped, so as to avoid the problem of heat loss caused by the piston cooling nozzle 50 still cooling the piston under low-load and normal temperature conditions. When the aforementioned conditions are not met, the solenoid switch valve is controlled to be turned on, and the oil flows to the piston cooling nozzle 50. The piston cooling nozzle 50 sprays cooled oil on the piston to cool it down, thereby avoiding damage to the device caused by excessive piston temperature.

[0133] If the engine is in a medium load condition and the oil temperature is less than the fourth temperature threshold, the electromagnetic switch valve is controlled to be closed, and the oil supply to the piston cooling nozzle 50 is stopped, so as to avoid the problem of heat loss caused by the piston cooling nozzle 50 still cooling the piston under medium load and low temperature conditions. Otherwise, the electromagnetic switch valve is controlled to be turned on; if the engine is in a high load condition and the oil temperature is less than the fifth temperature threshold, the electromagnetic switch valve is controlled to be closed, and the oil supply to the piston cooling nozzle 50 is stopped, so as to avoid the problem of heat loss caused by the piston cooling nozzle 50 still cooling the piston under high load and lower temperature conditions, otherwise, the electromagnetic switch valve is controlled to be turned on.

[0134] In this embodiment, if the engine is in a low-load condition and the oil temperature is greater than the third temperature threshold, the opening of the electromagnetic switch valve is adjusted based on the oil temperature; wherein the opening of the electromagnetic switch valve is positively correlated with the oil temperature, that is, the higher the oil temperature, the gradually increasing opening of the electromagnetic switch valve from 0% until the opening of the electromagnetic switch valve is 100%. Similarly, if the engine is in a medium-load condition and the oil temperature is greater than the fourth temperature threshold, the opening of the electromagnetic switch valve is adjusted based on the oil temperature; if the engine is in a high-load condition and the oil temperature is greater than the fifth temperature threshold, the opening of the electromagnetic switch valve is adjusted based on the oil temperature.

[0135] It can be seen from the above embodiments that the above method can control the oil cooler to be closed and the piston cooling nozzle to be closed when the oil temperature is low or the engine load is small, thereby further reducing the time required for the oil to heat up and maintaining the oil temperature at a higher level.

[0136] In a possible implementation, the lubricating components include a plurality of components; if the oil temperature is less than a preset temperature value and the engine is in a corresponding operating condition, the specific implementation process of increasing the oil flow ratio of the lubricating component includes:

[0137] If the engine is in a low-load condition and the engine oil temperature is less than a third temperature threshold, the engine oil flow distribution device is controlled to distribute the inflowing engine oil to each lubricating component according to a first flow distribution ratio;

[0138] If the engine is in a medium load condition and the oil temperature is less than a fourth temperature threshold, the oil flow distribution device is controlled to distribute the inflowing oil to each lubricating component according to a second flow distribution ratio;

[0139] If the engine is in a high-load condition and the oil temperature is less than a fifth temperature threshold, the oil flow distribution device is controlled to distribute the inflowing oil to each lubricating component according to a third flow distribution ratio;

[0140] The third temperature threshold is lower than the first temperature threshold and higher than the fourth temperature threshold, and the fourth temperature threshold is higher than the fifth temperature threshold.

[0141] The corresponding relationship between the operating conditions, oil temperature and flow distribution ratio of different engines can be determined through experiments and stored in the engine controller in advance. This method can distribute flow to each lubricating component as needed based on the oil temperature and engine operating conditions, thereby reducing the total flow demand of the oil pump 70 and improving the oil utilization rate while ensuring that the friction loss of each lubricating component is small.

[0142] In a possible implementation, the oil flow distribution device includes a multi-way electromagnetic proportional valve; the above-mentioned control of the oil flow distribution device to distribute the inflowing oil to each lubrication component according to the first flow distribution ratio includes:

[0143] Determine the target opening of the electromagnetic proportional valve corresponding to each lubrication component based on the first flow distribution ratio;

[0144] Adjust the opening of the electromagnetic proportional valve of each lubrication component to its corresponding target opening.

[0145] Specifically, the present embodiment can adjust the opening of each electromagnetic proportional valve based on the flow distribution ratio, so that each electromagnetic proportional valve passes a corresponding oil flow, thereby achieving precise control of the oil flow.

[0146] In a possible implementation, after controlling the heating device to start, the method further includes:

[0147] When the oil temperature of the oil pan is higher than a second temperature threshold, the heating device is controlled to stop working.

[0148] Specifically, the second temperature threshold is greater than the first temperature threshold. The heating device 10 is controlled to start and stop according to the oil temperature, and the algorithm is simple and reliable, thereby improving the reliability of oil thermal management.

[0149] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0150] The following is an embodiment of the device of the present application. For details not described in detail, please refer to the corresponding method embodiment described above.

[0151] Figure 5 The structure diagram of the control device of the engine oil thermal management system provided by the embodiment of the present application is shown. For the convenience of explanation, only the part related to the embodiment of the present application is shown, which is described in detail as follows:

[0152] like Figure 5 As shown, the control device 100 of the engine oil thermal management system includes:

[0153] The oil heating module 110 is used to control the heating device to start and heat the oil in the oil pan when the temperature of the oil in the oil pan is lower than a first temperature threshold;

[0154] The working state regulating module 120 is used to control the working state of the bypass device and the oil flow ratio distributed by the oil flow distribution device to the cooling component and the lubricating component based on the oil temperature and the operating condition of the engine.

[0155] It can be seen from the above embodiments that the control device of the above engine oil thermal management system flexibly adjusts the flow direction and flow rate of the oil according to the engine operating conditions and oil temperature, and can stop the oil from entering the oil cooler for excessive heat dissipation when the engine is under low load and the oil temperature is relatively low. At the same time, the oil flow rate entering the cooling components and lubricating components can be adjusted to avoid heat loss, thereby improving the engine cold start performance, reducing the warm-up time, and achieving simultaneous reductions in emissions and fuel consumption. When the engine is under high load and the oil temperature is relatively high, the oil cooler is used to dissipate the oil in a timely manner to ensure the safe operation of the engine.

[0156] In a possible implementation, the working state adjustment module 120 includes:

[0157] If the oil temperature is lower than a preset temperature value and the engine is in a corresponding operating condition, the main pipeline of the bypass device is controlled to be connected and the bypass pipeline is controlled to be closed.

[0158] In a possible implementation, the preset temperature value includes a third temperature threshold, a fourth temperature threshold and a fifth temperature threshold; the operating condition of the engine includes a low load condition, a medium load condition and a high load condition; the working state adjustment module 120 further includes:

[0159] If the engine is in a low-load condition and the engine oil temperature is less than a third temperature threshold, the bypass pipeline of the bypass device is controlled to be connected and the main pipeline is closed;

[0160] If the engine is in a medium load condition and the engine oil temperature is less than a fourth temperature threshold, the bypass pipeline of the bypass device is controlled to be connected and the main pipeline is closed;

[0161] If the engine is in a high-load condition and the engine oil temperature is less than a fifth temperature threshold, the bypass pipeline of the bypass device is controlled to be connected and the main pipeline is closed;

[0162] The third temperature threshold is lower than the first temperature threshold and higher than the fourth temperature threshold, and the fourth temperature threshold is higher than the fifth temperature threshold.

[0163] In a possible implementation, the working state adjustment module 120 further includes:

[0164] If the oil temperature is lower than a preset temperature value and the engine is in a corresponding operating condition, the oil flow distribution device is controlled to reduce the oil flow ratio of the cooling component and increase the oil flow ratio of the lubricating component.

[0165] In a possible implementation, the working state adjustment module 120 further includes:

[0166] If the engine is in a low-load condition and the engine oil temperature is less than a third temperature threshold, the electromagnetic switch valve is controlled to be turned off; otherwise, the electromagnetic switch valve is controlled to be turned on;

[0167] If the engine is in a medium load condition and the engine oil temperature is lower than a fourth temperature threshold, the electromagnetic switch valve is controlled to be turned off; otherwise, the electromagnetic switch valve is controlled to be turned on;

[0168] If the engine is in a high-load condition and the engine oil temperature is less than a fifth temperature threshold, the electromagnetic switch valve is controlled to be turned off; otherwise, the electromagnetic switch valve is controlled to be turned on;

[0169] The third temperature threshold is lower than the first temperature threshold and higher than the fourth temperature threshold, and the fourth temperature threshold is higher than the fifth temperature threshold.

[0170] In a possible implementation, the lubrication component includes multiple components; the working state adjustment module 120 further includes:

[0171] a first flow distribution unit, configured to control the oil flow distribution device to distribute the inflowing oil to each lubricating component according to a first flow distribution ratio if the engine is in a low-load condition and the oil temperature is less than a third temperature threshold;

[0172] a second flow distribution unit, configured to control the oil flow distribution device to distribute the inflowing oil to each lubricating component according to a second flow distribution ratio if the engine is in a medium load condition and the oil temperature is less than a fourth temperature threshold;

[0173] a third flow distribution unit, configured to control the oil flow distribution device to distribute the inflowing oil to each lubricating component according to a third flow distribution ratio if the engine is in a high load condition and the oil temperature is less than a fifth temperature threshold;

[0174] The third temperature threshold is lower than the first temperature threshold and higher than the fourth temperature threshold, and the fourth temperature threshold is higher than the fifth temperature threshold.

[0175] In a possible implementation, the oil flow distribution device includes a multi-way electromagnetic proportional valve; the first flow distribution unit includes:

[0176] Determine the target opening of the electromagnetic proportional valve corresponding to each lubrication component based on the first flow distribution ratio;

[0177] Adjust the opening of the electromagnetic proportional valve of each lubrication component to its corresponding target opening.

[0178] In a possible implementation, the control device of the engine oil thermal management system further includes:

[0179] The heating stop module is used to control the heating device to stop working when the oil temperature of the oil pan is higher than a second temperature threshold.

[0180] The present application also provides a computer program product having a program code, which executes the steps of any of the above-mentioned engine oil thermal management system control method embodiments when the program code is run in a corresponding processor, controller, computing device or controller, such as Figure 3 Steps S101 to S102 shown. It will be appreciated by those skilled in the art that the method and the device proposed in the embodiment of the present application can be implemented in various forms of hardware, software, firmware, a dedicated processor or a combination thereof. The dedicated processor may include an application specific integrated circuit (ASIC), a reduced instruction set computer (RISC) and / or a field programmable gate array (FPGA). The proposed method and device are preferably implemented as a combination of hardware and software. The software is preferably installed on a program storage device as an application. It is typically based on a machine with a computer platform having hardware, such as one or more central processing units (CPUs), random access memories (RAMs) and one or more input / output (I / O) interfaces. An operating system is also typically installed on the computer platform. The various processes and functions described herein may be part of an application, or a part thereof may be executed by an operating system.

[0181] Figure 6 is a schematic diagram of a controller provided in an embodiment of the present application. Figure 6 As shown, the controller 6 of this embodiment includes: a processor 60, a memory 61, and a computer program 62 stored in the memory 61 and executable on the processor 60. When the processor 60 executes the computer program 62, the steps in the above-mentioned control method of each engine oil thermal management system are implemented, such as Figure 3Alternatively, when the processor 60 executes the computer program 62, the functions of each module / unit in the above-mentioned device embodiments are realized, for example Figure 5 The functions of the modules 110 to 120 are shown.

[0182] Exemplarily, the computer program 62 may be divided into one or more modules / units, which are stored in the memory 61 and executed by the processor 60 to complete / implement the solution provided by the present application. The one or more modules / units may be a series of computer program instruction segments capable of completing specific functions, which are used to describe the execution process of the computer program 62 in the controller 6.

[0183] The controller 6 may include, but is not limited to, a processor 60 and a memory 61. Those skilled in the art will appreciate that Figure 6 It is only an example of the controller 6 and does not constitute a limitation of the controller 6. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the controller may also include input and output devices, network access devices, buses, etc.

[0184] The processor 60 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0185] The memory 61 may be an internal storage unit of the controller 6, such as a hard disk or memory of the controller 6. The memory 61 may also be an external storage device of the controller 6, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the controller 6. Further, the memory 61 may also include both an internal storage unit of the controller 6 and an external storage device. The memory 61 is used to store the computer program and other programs and data required by the controller. The memory 61 may also be used to temporarily store data that has been output or is to be output.

[0186] The present application provides an engine oil thermal management system, including the controller as described above and Figure 1 or Figure 2 The structure described.

[0187] The present application provides a vehicle, comprising: the engine oil thermal management system as described above.

[0188] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0189] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0190] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0191] In the embodiments provided in the present application, it should be understood that the disclosed devices / controllers and methods can be implemented in other ways. For example, the device / controller embodiments described above are merely schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0192] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0193] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0194] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the control method embodiments of the above-mentioned engine oil thermal management system can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device that can carry the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practices in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practices, computer-readable media does not include electrical carrier signals and telecommunication signals.

[0195] In addition, the embodiments shown in the drawings of the present application or the features of the various embodiments mentioned in this specification are not necessarily understood as independent embodiments. Instead, each feature described in one example of an embodiment can be combined with one or more other desired features from other embodiments to produce other embodiments not described in words or with reference to the drawings.

[0196] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A control method for an engine oil thermal management system, characterized in that: The engine oil thermal management system comprises an oil pan, a heating device, a bypass device, an oil cooler, an oil flow distribution device, a cooling component and a lubricating component; the oil pan is in communication with an input end of the bypass device; an output end of a main pipeline of the bypass device is in communication with an input end of the oil cooler; an output end of the oil cooler and a bypass pipeline of the bypass device are in communication with an input end of the oil flow distribution device respectively; an output end of the oil flow distribution device is in communication with the lubricating component and the cooling component respectively; the heating device is used to heat the oil in the oil pan; The method comprises: When the temperature of the engine oil in the oil pan is lower than a first temperature threshold, controlling the heating device to start and heat the engine oil in the oil pan; Based on the oil temperature and the operating condition of the engine, the working state of the bypass device and the oil flow ratio distributed by the oil flow distribution device to the cooling component and the lubricating component are controlled.

2. The control method of the engine oil thermal management system according to claim 1, characterized in that: The controlling the working state of the bypass device based on the oil temperature and the operating condition of the engine includes: If the oil temperature is lower than a preset temperature value and the engine is in a corresponding operating condition, the main pipeline of the bypass device is controlled to be connected and the bypass pipeline is controlled to be closed.

3. The control method of the engine oil thermal management system according to claim 2, characterized in that: The preset temperature values ​​include a third temperature threshold, a fourth temperature threshold and a fifth temperature threshold; the operating conditions of the engine include a low load condition, a medium load condition and a high load condition; If the oil temperature is lower than a preset temperature value and the engine is in a corresponding operating condition, controlling the main pipeline of the bypass device to be turned on and the bypass pipeline to be turned off includes: If the engine is in a low-load condition and the engine oil temperature is less than a third temperature threshold, the bypass pipeline of the bypass device is controlled to be connected and the main pipeline is closed; If the engine is in a medium load condition and the engine oil temperature is less than a fourth temperature threshold, the bypass pipeline of the bypass device is controlled to be connected and the main pipeline is closed; If the engine is in a high-load condition and the engine oil temperature is less than a fifth temperature threshold, the bypass pipeline of the bypass device is controlled to be connected and the main pipeline is closed; The third temperature threshold is lower than the first temperature threshold and higher than the fourth temperature threshold, and the fourth temperature threshold is higher than the fifth temperature threshold.

4. The control method of the engine oil thermal management system according to claim 2, characterized in that: The controlling the oil flow ratio of the oil flow distribution device to the cooling component and the lubricating component based on the oil temperature and the operating condition of the engine comprises: If the oil temperature is lower than a preset temperature value and the engine is in a corresponding operating condition, the oil flow distribution device is controlled to reduce the oil flow ratio of the cooling component and increase the oil flow ratio of the lubricating component.

5. The control method of the engine oil thermal management system according to claim 4, characterized in that: The oil flow distribution device comprises an electromagnetic switch valve; the input end of the electromagnetic switch valve is connected to the output end of the oil cooler, and the output end of the electromagnetic switch valve is connected to the cooling component; the cooling component comprises a piston cooling nozzle; If the oil temperature is lower than a preset temperature value and the engine is in a corresponding operating condition, the oil flow distribution device is controlled to reduce the oil flow ratio of the cooling component, including: If the engine is in a low-load condition and the engine oil temperature is less than a third temperature threshold, the electromagnetic switch valve is controlled to be turned off; otherwise, the electromagnetic switch valve is controlled to be turned on; If the engine is in a medium load condition and the engine oil temperature is lower than a fourth temperature threshold, the electromagnetic switch valve is controlled to be turned off; otherwise, the electromagnetic switch valve is controlled to be turned on; If the engine is in a high-load condition and the engine oil temperature is less than a fifth temperature threshold, the electromagnetic switch valve is controlled to be turned off; otherwise, the electromagnetic switch valve is controlled to be turned on; The third temperature threshold is lower than the first temperature threshold and higher than the fourth temperature threshold, and the fourth temperature threshold is higher than the fifth temperature threshold.

6. The control method of the engine oil thermal management system according to claim 4, characterized in that: The lubricating components include a plurality of; If the oil temperature is less than a preset temperature value and the engine is in a corresponding operating condition, increasing the oil flow rate ratio of the lubricating component includes: If the engine is in a low-load condition and the engine oil temperature is less than a third temperature threshold, the engine oil flow distribution device is controlled to distribute the inflowing engine oil to each lubricating component according to a first flow distribution ratio; If the engine is in a medium load condition and the oil temperature is less than a fourth temperature threshold, the oil flow distribution device is controlled to distribute the inflowing oil to each lubricating component according to a second flow distribution ratio; If the engine is in a high-load condition and the oil temperature is less than a fifth temperature threshold, the oil flow distribution device is controlled to distribute the inflowing oil to each lubricating component according to a third flow distribution ratio; The third temperature threshold is lower than the first temperature threshold and higher than the fourth temperature threshold, and the fourth temperature threshold is higher than the fifth temperature threshold.

7. The control method of the engine oil thermal management system according to claim 6, characterized in that: The oil flow distribution device includes a multi-way electromagnetic proportional valve; the control of the oil flow distribution device to distribute the inflowing oil to each lubricating component according to a first flow distribution ratio includes: Determine the target opening of the electromagnetic proportional valve corresponding to each lubrication component based on the first flow distribution ratio; Adjust the opening of the electromagnetic proportional valve of each lubrication component to its corresponding target opening.

8. The control method of the engine oil thermal management system according to any one of claims 1 to 7, characterized in that: After controlling the heating device to start, the method further includes: When the oil temperature of the oil pan is higher than a second temperature threshold, the heating device is controlled to stop working.

9. A controller comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the control method of the engine oil thermal management system as described in any one of claims 1 to 8 are implemented.

10. An engine oil thermal management system, characterized in that: include: A controller as claimed in claim 9.

Images