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

Abstract

The application provides a control method, a controller and a system of an engine oil thermal management system, and relates to the technical field of engines. The method comprises: when the oil temperature of the oil pan is lower than a first temperature threshold, controlling the heating device to start and heat the oil of the oil pan; based on the oil temperature and the operating condition of the engine, controlling the working state of the bypass device and the proportion of the oil flow of the oil flow distribution device distributed to the cooling component and the lubricating component. The method can stop the oil from entering the oil cooler for excessive heat dissipation when the engine is in a low-load operating condition and the oil temperature is relatively low, and can adjust the oil flow entering the cooling component and the lubricating component, so as to avoid the heat loss caused by the cooling of the cooling component at low temperature or low power consumption, thereby improving the cold start performance of the engine, reducing the warm-up time, and simultaneously reducing the emission and fuel consumption.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engines, and particularly relates to a control method, a controller and a system of an engine oil thermal management system. BACKGROUND

[0002] With the intensification of global energy crisis and the increasingly stringent environmental protection regulations, the thermal management technology of diesel engines has become a core breakthrough for improving energy efficiency and reducing emissions. The current industry mainstream solution generally focuses on intelligent regulation and control of the cooling liquid system, and through the synergistic effect of the electronic thermostat, the electronic water pump and the modular thermal management system, the precise control of the engine working temperature can be realized.

[0003] The structure combination of the above-mentioned electronic thermostat and electronic water pump is mainly used to realize the indirect temperature control of the cooling liquid-oil heat exchanger. In this technology, the design of the heat exchanger is limited by the space layout and the heat dissipation efficiency. In the low-temperature starting or transient working condition, the temperature difference gradient of the cooling liquid and the oil easily causes local overheating or supercooling, forcing the system to frequently start the auxiliary heating / cooling device, further aggravating the energy consumption. SUMMARY

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

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

[0006] The method comprises:

[0007] When the oil temperature of the oil sump is lower than a first temperature threshold, the heating device is controlled to start to heat the oil of the oil sump.

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

[0009] From the above embodiments, the control method of the engine oil thermal management system can flexibly adjust the flow direction and flow rate of the oil according to the operating condition of the engine and the oil temperature, can stop the oil from entering the oil cooler for excessive heat dissipation when the engine is in a low load condition and the oil temperature is relatively low, and can adjust the oil flow rate entering the cooling components and the lubricating components to reduce the heat loss caused by the cooling components still cooling at low temperature or low power consumption, thereby improving the cold start performance of the engine, reducing the warm-up time, and reducing the emissions and fuel consumption at the same time. At the same time, the oil saved by the cooling components can be distributed to the lubricating components, thereby improving the oil utilization rate or reducing the total fuel consumption on the basis of the unchanged oil flow rate distributed to each lubricating component.

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

[0011] If the oil temperature is less than a preset temperature value and the engine is in a corresponding operating condition, the bypass pipeline of the bypass device is turned on and the main pipeline is turned off.

[0012] From the above embodiments, when the oil temperature is not high and the corresponding engine load does not cause the oil temperature to rapidly rise to the upper limit of the temperature, the oil is no longer cooled by the oil cooler, thereby reasonably utilizing the heat generated by engine combustion to shorten the cold start and warm-up time and reduce the overall fuel consumption.

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

[0014] The control of the working state of the bypass device based on the oil temperature and the operating condition of the engine comprises:

[0015] If the engine is in a low load condition and the oil temperature is less than the third temperature threshold, the bypass pipeline of the bypass device is turned on and the main pipeline is turned off.

[0016] If the engine is in a medium load condition and the oil temperature is less than the fourth temperature threshold, the bypass pipeline of the bypass device is turned on and the main pipeline is turned off.

[0017] If the engine is in a high load condition and the oil temperature is less than the fifth temperature threshold, the bypass pipeline of the bypass device is turned on and the main pipeline is turned off.

[0018] 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.

[0019] From the above embodiment, the above method can reduce the time required for the engine oil to be heated by bypassing as many bypass pipelines as possible without using the engine oil cooler when the engine oil does not need to be cooled, so that the engine oil temperature is maintained at a high level, and the friction loss under cold start and warm-up conditions is reduced.

[0020] In a possible implementation, the control of the oil flow distribution device to distribute the proportion of the engine oil flow to the cooling component and the lubricating component based on the engine oil temperature and the operating condition of the engine comprises:

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

[0022] From the above embodiment, the above method can reduce the time required for the engine oil to be heated by bypassing as many bypass pipelines as possible without using the engine oil cooler when the engine oil does not need to be cooled, so that the engine oil temperature is maintained at a high level, and the friction loss under cold start and warm-up conditions is reduced.

[0023] In a possible implementation, the oil flow distribution device comprises an electromagnetic on-off valve; an input end of the electromagnetic on-off valve is in communication with an output end of the engine oil cooler, and an output end of the electromagnetic on-off valve is in communication with the cooling component; and the cooling component comprises a piston cooling nozzle.

[0024] If the engine oil temperature is less than a preset temperature value and the engine is in a corresponding operating condition, the oil flow distribution device is controlled to reduce the proportion of the engine oil flow to the cooling component and increase the proportion of the engine oil flow to the lubricating component.

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

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

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

[0028] 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.

[0029] From the above embodiment, the above method can further reduce the time required for the oil to warm up when the oil temperature is low or the engine load is small, and maintain the oil temperature at a higher level on the basis of controlling the oil cooler to be closed.

[0030] In a possible implementation, the lubricating components include a plurality of;

[0031] If the oil temperature is less than a preset temperature value and the engine is in a corresponding operating condition, the oil flow ratio of the lubricating components is increased, including:

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

[0033] If the engine is in a medium load working 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 working 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 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.

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

[0037] In a possible implementation, the oil flow distribution device includes a plurality of electromagnetic proportional valves; and the control of the oil flow distribution device to distribute the inflowing oil to each lubricating component according to the first flow distribution ratio includes:

[0038] The target opening of the electromagnetic proportional valve corresponding to each lubricating component is determined based on the first flow distribution ratio;

[0039] The electromagnetic proportional valve opening degree of each lubricating component is adjusted to the respective corresponding target opening degree.

[0040] In a possible implementation, after the control of the starting of the heating device, the method further includes:

[0041] When the oil temperature of the oil sump is higher than a second temperature threshold, the control of the stopping of the heating device is performed.

[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, and the processor implements the steps of the method according to the possible implementation of the first aspect.

[0043] In a third aspect, the present application provides an engine oil thermal management system, comprising the controller according to the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative labor.

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

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

[0047] Figure 3 is an implementation flowchart of a control method of an engine oil thermal management system provided by the embodiments of the present application;

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

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

[0050] Figure 6 is a schematic diagram of a controller provided by the embodiments of the present application. DETAILED DESCRIPTION

[0051] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0052] To make the objectives, technical solutions, and advantages of this application clearer, the following description will be provided in conjunction with the accompanying drawings and specific embodiments.

[0053] During engine operation, heat generated by friction and combustion is transferred through the engine oil. Engine oil temperature directly affects lubrication performance and system reliability. When the engine oil temperature exceeds a certain value, its oxidation rate accelerates significantly, and the viscosity index decreases, leading to a reduction in oil film carrying capacity. Conversely, at low temperatures, oil viscosity increases sharply, increasing oil pump power consumption. Studies show that for every 10°C increase in engine oil temperature, engine friction losses decrease by 7-10%, but excessive cooling leads to heat waste. Therefore, constructing an efficient and precise engine oil thermal management system is crucial for improving fuel economy and emissions performance.

[0054] Currently, engine oil thermal management typically employs indirect heat exchange technology between coolant and engine oil. This involves an electronic thermostat and an electronic water pump working together to control the coolant flow, thereby regulating the engine oil temperature. However, this approach suffers from limitations in heat exchange efficiency, lag in dynamic response, and inefficient flow distribution, resulting in low engine thermal management efficiency and excessive energy consumption.

[0055] This application addresses the aforementioned problems of low thermal management efficiency and high energy consumption in engines by proposing a control method for an engine oil thermal management system. Through a three-dimensional thermal management system of "direct heating + dynamic bypass + intelligent distribution", the thermal management efficiency of the engine can be improved, and energy consumption can be reduced.

[0056] Figure 1 This is a schematic diagram of the engine oil thermal management system provided in an embodiment of this application, as shown below. 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 lubrication component 200; the oil pan 40 is connected to the input end of the bypass device 20; the output end of the main pipe 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 pipe 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 lubrication 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 sump 40 is a sealed container located at the bottom of the engine, used to store 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 sump 40, which can use PTC ceramic heating or resistance wire heating to ensure that the oil viscosity is reduced to a flowable state in low temperature environments.

[0059] The bypass device 20 is a flow switching device based on a three-way electromagnetic valve, including 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; by switching the main and auxiliary oil circuits to achieve cooling demand adjustment, the oil flow path can be changed according to the control signal.

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

[0061] Specifically, the cooling component 50 can be a piston cooling nozzle, a piston top oil injection cooling hole, etc., and the lubrication component 200 can include a cylinder body lubrication component 202 and a cylinder head lubrication component 201.

[0062] The oil flow distribution device 30 is used to distribute the proportion of oil flow entering the lubrication component and the cooling component.

[0063] In one possible implementation, as shown in Figure 2 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 sump 40 is in communication with the inlet of the oil collector 60, the outlet of the oil collector 60 is in communication with the inlet of the oil pump 70, and the outlet of the oil pump 70 is in communication with the inlet of the bypass device. The inlet of the oil filter 90 is in communication with the outlet of the bypass pipeline of the bypass device 20 and the oil cooler 80 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. It is used to initially filter large particulate impurities in the oil, preventing them from entering the oil pump 70 and the lubrication system. It consists of a metal filter screen and an oil suction pipe; the filter screen has a relatively large pore size, primarily intercepting larger foreign objects. The oil pump 70 is the core component of the engine lubrication system, responsible for pressurizing and delivering oil from the oil pan 40 to the various friction surfaces of the engine, establishing and maintaining oil pressure to ensure that the oil reaches high-speed moving parts such as the crankshaft, camshaft, and pistons. Through continuous circulation, it provides lubrication, cooling, and cleaning for the engine. The oil filter 90 is a filter device installed in the engine lubrication system, used to remove impurities such as metal shavings, carbon deposits, and gum carried by the oil during circulation, keeping the oil clean and preventing particulate matter from wearing down internal engine parts (such as bearings and cylinder walls). It typically consists of a metal housing, filter paper (or synthetic fiber filter media), and a bypass valve. When the filter element is clogged, the bypass valve opens to ensure oil circulation.

[0066] In one embodiment, the lubrication components include a cylinder block lubrication component 201 and a cylinder head lubrication component 202. The cylinder block lubrication component 201 includes a vacuum pump, a timing system, camshaft journals, and hydraulic tappets. The cylinder head lubrication component 202 includes a high-pressure oil pump, a balance shaft, a turbocharger, connecting rod journals, and main shaft journals.

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

[0068] Specifically, a multi-way electromagnetic proportional valve can be a four-way valve, such as... Figure 2 As shown, one of the output ports is connected to the main oil pipe of the cylinder block, and the main oil pipe of the cylinder block is connected to the branch pipes of each cylinder block lubrication component 201; the other output port is connected to the main oil pipe of the cylinder head, and the main oil pipe of the cylinder head is connected to the branch pipes of each cylinder head lubrication component 202. The outlet of the lubrication pipe of each lubrication component is connected to the oil pan.

[0069] As another embodiment, the number of proportional valves in a multi-port electromagnetic 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 enabling precise control of the oil flow of each lubrication component and further improving oil utilization.

[0070] In one embodiment, the engine oil thermal management system can further comprise a controller configured to control the working state of the bypass device and to control the oil flow distribution device to distribute the engine oil to the cooling components and the lubricating components.

[0071] In particular, the controller can be an on-board controller or an off-board controller, or a combination of the on-board controller and the off-board controller. When the controller is an on-board controller, the controller can be an engine controller.

[0072] Based on the engine oil thermal management system, the application provides a control method of the engine oil thermal management system. The execution subject of the control method can be the controller of the engine oil thermal management system. The control method of the engine oil thermal management system is described below with reference to the engine oil thermal management system. Figure 2 , Figure 2 An implementation flowchart of the control method of the engine oil thermal management system is shown, and the process is described in detail as follows.

[0073] S101: When the engine oil temperature of the oil sump is lower than a first temperature threshold, the heating device is controlled to be started to heat the engine oil of the oil sump.

[0074] In this embodiment, when the engine oil temperature of the oil sump 40 is lower than the first temperature threshold, it indicates 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 heating device 10 can be started to heat the engine oil of the oil sump 40.

[0075] S102: Based on the engine oil temperature and the operating condition of the engine, the working state of the bypass device and the proportion of the engine oil flow distributed to the cooling components and the lubricating components by the oil flow distribution device are controlled.

[0076] In this embodiment, when the engine oil temperature is low or the engine load is small, for example, in a cold start, a warm-up stage, a small load, or a shutdown stage, the controller can control the main pipeline of the bypass device 20 to be closed and the bypass pipeline to be open, so that the engine oil is not cooled by the oil cooler 80, so as to reasonably utilize the heat generated by the engine combustion, reduce heat loss, shorten the time of cold start, warm-up, and shutdown, avoid waste of cold energy, and adjust the proportion of the engine oil flow flowing into the cooling components and the lubricating components. In the cold start and warm-up stages, the engine oil flow flowing into the cooling components is reduced to avoid heat loss and increase or maintain the engine oil flow flowing into the lubricating components, so as to reduce fuel consumption while ensuring the lubricating effect of the lubricating components. When the engine oil temperature of the oil sump 40 is high and the engine load is large, the bypass device 20 needs to open the main pipeline to make the engine oil enter the oil cooler 80 to be cooled, so as to reduce the engine oil temperature.

[0077] The bypass device 20 can include two electromagnetic valves, which are respectively arranged in the main pipeline and the bypass pipeline, for controlling the flow of the oil that needs to be cooled and the flow of the oil that does not need to be cooled. On this basis, the controller controls the opening degree of the electromagnetic valve in the main pipeline and the opening degree of the electromagnetic valve in the bypass pipeline in the bypass device 20 based on the oil temperature and the engine operating condition, so that the oil temperature quickly enters the preset temperature range. For example, the sum of the opening degree of the electromagnetic valve in the main pipeline and the opening degree of the electromagnetic valve in the bypass pipeline is 1. When the oil temperature is less than the preset temperature value and the engine is in a low-load operating condition, the opening degree of the electromagnetic valve in the bypass pipeline is greater than the opening degree of the electromagnetic 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 degree of the electromagnetic valve in the bypass pipeline is less than the opening degree of the electromagnetic valve in the main pipeline, so as to satisfy that the oil temperature and the flow are in the corresponding suitable range and reduce the fluctuation of the oil temperature.

[0078] From the above embodiment, it can be known that the control method of the engine oil thermal management system can flexibly adjust the flow direction and flow of the oil according to the operating condition of the engine and the oil temperature, can stop the oil from entering the oil cooler for excessive heat dissipation when the engine is in a low-load operating condition and the oil temperature is relatively low, can adjust the flow of the oil entering the cooling component and the lubricating component, and avoid heat loss, so as to improve the cold start performance of the engine, reduce the warm-up time, and simultaneously reduce the emission and fuel consumption. When the engine is in a high-load operating condition and the oil temperature is relatively high, the oil cooler is used to timely dissipate heat of the oil, so as to ensure the safe operation of the engine.

[0079] In a possible implementation manner, 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 less than the preset temperature value and the engine is in the corresponding operating condition, the bypass pipeline of the bypass device is turned on and the main pipeline is turned off.

[0081] Specifically, the working state of the bypass device includes a state in which the main pipeline is turned on and the bypass pipeline is turned off, and a state in which the main pipeline is turned off and the bypass pipeline is turned on. When the oil temperature is less than the preset temperature value, it indicates that the heat generated by the engine is not high at this time, and if the load of the engine is also not high, it indicates that the engine is in a low-power operating condition, the current oil temperature viscosity is appropriate, and the engine can work well without the oil cooler 80 cooling the oil.

[0082] For example, the present embodiment can set a corresponding relationship table of the oil temperature, the operating condition of the engine and the working state of the bypass device 20 in advance, and the controller determines the corresponding working state of the bypass device 20 under different oil temperatures and engine operating conditions by looking up the table.

[0083] In the embodiment, the low-power consumption condition can be a condition in which the engine speed is less than a preset speed value, or a condition in which the load is less than a preset load value. Since the heat dissipation efficiency of the engine oil and the engine thermal load are significantly different under different environmental conditions, different control strategies are required, and therefore the preset temperature value can be determined based on environmental information of the vehicle. The environmental information includes environmental temperature and / or altitude data.

[0084] Specifically, the controller can identify the external environmental temperature in which the vehicle is located through an environmental temperature sensor, and obtain the altitude data of the location of the vehicle through a barometric pressure sensor or GPS elevation data. Then, the corresponding preset temperature value is determined based on the external environmental temperature and / or the altitude data.

[0085] Specifically, the external environmental temperature is positively correlated with the preset temperature value. After the preset temperature value is determined based on the external environmental temperature, if the vehicle is located in a plateau area, the preset temperature value obtained based on the external environmental 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 environmental temperature is: calculating the preset temperature value based on the formula Tset=Tbase+k*(Tambient Tref), where Tset represents the preset temperature value, Tbase represents a base temperature value, Tref represents a reference environmental temperature, and Tambient represents the external environmental temperature.

[0087] As can be seen from the above embodiment, when the oil temperature is not high and the corresponding engine load does not cause the oil temperature to rapidly rise to the upper limit of the temperature, the oil is not cooled by the oil cooler, so that the heat generated by engine combustion is reasonably utilized, and the purposes of shortening the cold start and warm-up time and reducing the overall fuel consumption are achieved.

[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 operating condition, a medium-load operating condition, and a high-load operating condition; and the specific implementation process of controlling the bypass pipe of the bypass device to be conducted and the main pipe to be turned off in S102 includes:

[0089] If the engine is in the low-load operating condition and the oil temperature is less than the third temperature threshold, the bypass pipe of the bypass device is controlled to be conducted and the main pipe is turned off;

[0090] If the engine is in the medium-load operating condition and the oil temperature is less than the fourth temperature threshold, the bypass pipe of the bypass device is controlled to be conducted and the main pipe is turned off;

[0091] If the engine is in a high load working condition and the oil temperature is less than a fifth temperature threshold, a bypass pipe of the bypass device is turned on and a main pipe is turned off;

[0092] 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.

[0093] In the embodiment, the controller can determine the working condition of the engine based on the engine speed and the load, or determine the working condition of the engine based on the road type and the vehicle speed.

[0094] Specifically, when the working condition of the engine is determined based on the engine speed and the load, the smaller the load of the engine or the smaller the engine speed, the higher the oil temperature threshold at which the oil cooler 80 is not started to cool the oil, so the third temperature threshold is greater than the fourth temperature threshold, the fourth temperature threshold 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 one possible implementation, the obtaining processes of the first temperature threshold, the third temperature threshold, the fourth temperature threshold and the fifth temperature threshold are described as follows:

[0096] The obtained initial first temperature threshold, third temperature threshold, fourth temperature threshold and fifth temperature threshold are obtained; and 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 the 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 initial first temperature threshold, third temperature threshold, fourth temperature threshold and fifth temperature threshold are all added with the temperature change value to obtain the corrected first temperature threshold, third temperature threshold, fourth temperature threshold and fifth temperature threshold.

[0099] In the embodiment, the dielectric constant is a measure of the ability of a substance to polarize in an electric field, reflecting its ability to store electrical energy. Different substances or the same substance in different states (such as changes in temperature, degree of pollution) will change the dielectric constant. Specifically, after long-term use of engine oil, the base oil and additives are oxidized to form acidic substances, gum, etc., the number of polar molecules increases, resulting in an increase in the dielectric constant. In addition, engine oil pollution (such as mixing 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 the emulsification effect. Similarly, contaminants such as iron powder may also change the composition of the engine oil, causing both to change simultaneously. Therefore, when the dielectric constant increases, it represents an increase in the viscosity of the engine oil, and an increase in the viscosity of the engine oil will affect the lubrication effect, so it is necessary to further shorten the cold start, warm-up time, and make the engine oil temperature quickly rise to the normal temperature range.

[0100] The embodiment is based on the above principle, and the dielectric constant of the engine oil of the oil pan 40 is obtained through the dielectric constant sensor. If the difference between the actual value of the dielectric constant and the initial dielectric constant is greater than a preset constant threshold, the size of the temperature change value is determined based on the size of the dielectric constant, that is, the larger the dielectric constant, the larger the temperature change value, thereby increasing each temperature threshold, delaying the start time of the engine oil cooler 80 in the warm-up, cold start, low load, and shutdown working conditions, reducing the heat loss of the engine oil, shortening the warm-up time, reducing the viscosity of the engine oil, and further improving the utilization rate of the engine oil.

[0101] In one embodiment, when determining the operating condition of the engine based on the type of road and the 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, it is determined that the engine is in a low load condition;

[0103] If the vehicle is on a highway and the road roughness is less than a first slope threshold, it is determined that the engine is in a medium load condition;

[0104] If the vehicle has a load greater than a preset load threshold and the road roughness is greater than the 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] Firstly, the vehicle controller can obtain the road surface image of the to-be-traveled road surface through the vehicle-mounted camera, and identify the road surface image to determine the road surface type of the to-be-traveled road surface. The road surface type includes urban road, town road and highway. As another embodiment, the vehicle controller can also obtain the road type of the road on which the vehicle travels through navigation. After obtaining the road type, the vehicle controller sends the road type to the engine controller, and the engine controller determines the running condition based on the road type.

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

[0108] From the above embodiment, it can be seen that the above method can use as many as possible the bypass device bypass pipeline under the condition that the engine oil does not need to be cooled, thereby reducing the time required for the engine oil to be warmed up, maintaining the engine oil temperature at a high level, and reducing the friction loss under cold start and warm-up conditions.

[0109] In a possible implementation, when the running condition of the engine is determined 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 the first speed threshold, and the load of the engine is less than or equal to the first load threshold, it is determined that the engine is in a low-load condition;

[0111] If the speed of the engine is greater than the first speed threshold and less than or equal to the second speed threshold, and the load of the engine 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 speed of the engine is greater than the second speed threshold, and the load of the engine 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 less than the second load threshold; and the first speed threshold is less than the second speed threshold.

[0114] In this embodiment, Figure 4 An engine external characteristic curve diagram provided by the embodiment is shown as follows, Figure 4As shown, the graph shows the relationship between engine speed, oil temperature, and BMEP (Brake Mean Effective Pressure). BMEP represents the average effective pressure generated per unit of cylinder volume in the "braking" (i.e., power output) state of the engine. It is a key indicator of engine efficiency and power output, reflecting the ability of fuel combustion to convert energy into effective work. Therefore, the present embodiment can determine the load operating condition of the engine based on engine speed and load. Referring to 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 operating 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 operating 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 operating condition.

[0115] In the present embodiment, in order to avoid the hysteresis of load change, the present embodiment can also predict the load operating condition of the engine at the next time based on the load operating condition at the current time and the load change rate. For example, if the load operating condition at the current time is a low load operating condition, and the historical load change rate at the current time is greater than the first change rate threshold, then the operating condition at the next time is a medium load operating condition, otherwise it is still a low load operating condition. Similarly, if the load operating condition at the current time is a medium load operating condition, and the historical load change rate at the current time is greater than the first change rate threshold, then the operating condition at the next time is a high load operating condition, otherwise it is still a medium load operating condition. Conversely, if the load operating condition at the current time is a high load operating condition, and the historical load change rate at the current time is less than the second change rate threshold, then the operating condition at the next time is a medium load operating condition, otherwise it is still a high load operating condition. Similarly, if the load operating condition at the current time is a medium load operating condition, and the historical load change rate at the current time is less than the second change rate threshold, then the operating condition at the next time is a low load operating condition, otherwise it is still a medium load operating condition. Wherein the first change rate threshold is positive, and the second change rate threshold is negative.

[0116] By predicting the operating condition of the engine at the future time 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 the warm-up, cold start time, and improving oil utilization.

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

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

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

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

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

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

[0123] If the oil temperature is less 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 the embodiment, when the oil temperature is less than the preset temperature value and the engine is in the corresponding operating condition, that is, based on the current oil temperature and the operating condition of the engine, it can be determined that the oil temperature will not quickly rise to the upper temperature limit value, that is, the oil temperature will be in the normal temperature range in the last few cycles, at this time, the engine does not need to be quickly cooled for some components to be cooled (such as the piston), so the oil flow into the cooling component can be reduced, and under the condition that the engine is in the same operating condition and the amount of oil pumped by the oil pump is unchanged, the controller can also control the oil flow distribution device to increase the oil flow ratio into the lubricating component, thereby improving the oil utilization rate and the lubrication effect of the lubricating component.

[0125] On the other hand, the controller can also determine the amount of pumped oil according to the engine operating condition, the speed, the oil temperature and other parameters, so as to reduce the total amount of oil pumped by the oil pump when it is determined that the oil temperature is less than the preset temperature value and the engine is in the corresponding operating condition, and reduce the oil flow into the cooling component, and distribute the total amount of oil after reduction to each lubricating component to meet the oil flow demand of the lubricating component and achieve the effect of saving fuel consumption.

[0126] From the above embodiments, the method can reduce the flow of cooling oil into the cooling component, increase the flow of oil to the lubricating component, reduce the heat loss of the oil during the cold start and warm-up stage, reduce the energy consumption of the engine oil thermal management system, and improve the lubrication effect of the lubricating component and improve the utilization rate of the oil.

[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, a specific implementation process of controlling the oil flow distribution device to reduce the oil flow proportion of the cooling component includes:

[0128] If the engine is in a low load condition and the 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 oil temperature is less 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 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 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.

[0132] In this embodiment, if the engine is in a low load condition and the oil temperature is less than a third temperature threshold, the electromagnetic switch valve is controlled to be turned off, and the piston cooling nozzle 50 is stopped from being supplied with oil, thereby avoiding the problem that the piston cooling nozzle 50 still cools the piston in a low load and normal temperature condition, causing heat loss. When the foregoing conditions are not met, the electromagnetic switch valve is controlled to be turned on, oil flows to the piston cooling nozzle 50, the piston cooling nozzle 50 sprays cooled oil to the piston, thereby avoiding the problem that the high temperature of the piston causes device damage.

[0133] If the engine is in a medium load working condition and the oil temperature is less than a fourth temperature threshold, the electromagnetic switch valve is controlled to be turned off to stop the oil supply to the piston cooling nozzle 50, avoiding the problem that the piston cooling nozzle 50 still cools the piston in a medium load low temperature working condition, resulting in heat loss. Otherwise, the electromagnetic switch valve is controlled to be turned on. If the engine is in a high load working condition and the oil temperature is less than a fifth temperature threshold, the electromagnetic switch valve is controlled to be turned off to stop the oil supply to the piston cooling nozzle 50, avoiding the problem that the piston cooling nozzle 50 still cools the piston in a high load low temperature working condition, resulting in heat loss. Otherwise, the electromagnetic switch valve is controlled to be turned on.

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

[0135] From the above embodiment, it can be seen that the above method can further reduce the time required for oil temperature rise when the oil temperature is low or the engine load is low by controlling the oil cooler to be turned off and the piston cooling nozzle to be turned off, so as to maintain the oil temperature at a higher level.

[0136] In a possible implementation, the lubricating components include a plurality of; the specific implementation process of the above-mentioned if the oil temperature is less than a preset temperature value and the engine is in a corresponding working condition, the oil flow ratio of the lubricating components is increased, which includes:

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

[0138] If the engine is in a medium load working 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 working 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 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.

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

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

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

[0144] adjusting the opening degree of the electromagnetic proportional valve of each lubricating component to the corresponding target opening degree.

[0145] Specifically, the embodiment can adjust the opening degree of each electromagnetic proportional valve based on the flow distribution ratio, so that each electromagnetic proportional valve realizes precise control of the oil flow through the corresponding oil flow.

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

[0147] controlling the heating device to stop working when the oil temperature of the oil sump is higher than a second temperature threshold.

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

[0149] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiment of the application.

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

[0151] Figure 5 The structure of the control device of the engine oil thermal management system provided by the embodiment of the present application is shown. For ease of illustration, only the parts related to the embodiment of the present application are shown, and the details are as follows:

[0152] As Figure 5 shown in the figure, the control device 100 of the engine oil thermal management system comprises:

[0153] an oil heating module 110, configured to control the heating device to start to heat the oil in the oil sump when the oil temperature in the oil sump is lower than a first temperature threshold;

[0154] a working state adjustment module 120, configured to control the working state of the bypass device and the proportion of the oil flow of the oil flow distribution device distributed to the cooling component and the lubricating component based on the oil temperature and the operating condition of the engine.

[0155] From the above embodiment, it can be seen that the control device of the engine oil thermal management system can flexibly adjust the flow direction and flow of the oil according to the operating condition of the engine and the oil temperature, can stop the oil from entering the oil cooler for excessive heat dissipation when the engine is in a low load condition and the oil temperature is relatively low, can adjust the oil flow into the cooling component and the lubricating component at the same time to avoid heat loss, thereby improving the cold start performance of the engine, reducing the warm-up time, and achieving the simultaneous reduction of emissions and fuel consumption. When the engine is in a high load condition and the oil temperature is relatively high, the oil cooler is used to dissipate heat from the oil in time to ensure the safe operation of the engine.

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

[0157] If the oil temperature is less than a preset temperature value and the engine is in a corresponding operating condition, the bypass pipeline of the bypass device is turned on and the main pipeline is turned off.

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

[0159] If the engine is in a low load condition and the oil temperature is less than the third temperature threshold, the bypass pipeline of the bypass device is turned on and the main pipeline is turned off;

[0160] If the engine is in a medium load condition and the oil temperature is less than the fourth temperature threshold, the bypass pipeline of the bypass device is turned on and the main pipeline is turned off;

[0161] If the engine is in a high load condition and the oil temperature is less than the fifth temperature threshold, the bypass pipeline of the bypass device is turned on and the main pipeline is turned off;

[0162] 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.

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

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

[0170] In a possible implementation, the lubricating components include a plurality of; the working state adjustment module 120 further includes:

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

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

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

[0174] 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.

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

[0176] The target opening degree of the electromagnetic proportional valve corresponding to each lubricating component is determined based on the first flow distribution proportion;

[0177] The opening degree of the electromagnetic proportional valve of each lubricating component is adjusted to the corresponding target opening degree.

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

[0179] A heating stopping module is configured to control the heating device to stop working when the oil temperature of the oil sump is higher than a second temperature threshold.

[0180] The embodiments of the present application also provide a computer program product having program codes, which perform the steps in any one of the above-mentioned engine oil thermal management system control method embodiments when running in a corresponding processor, controller, computing device or controller, for example Figure 3 the steps S101 to S102. It should be understood by those skilled in the art that the method and the device proposed by the embodiments of the present application can be realized in various forms of hardware, software, firmware, special-purpose processor or combination thereof. The special-purpose processor can include application-specific integrated circuit (ASIC), reduced instruction set computer (RISC) and / or field programmable gate array (FPGA). The proposed method and device are preferably realized as a combination of hardware and software. The software is preferably installed as an application program on a program storage device. It is typically a machine based on a computer platform with hardware, such as one or more central processing units (CPU), random access memory (RAM) 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 can be part of the application program, or part thereof can be executed by the operating system.

[0181] Figure 6 is a schematic diagram of the controller provided by the embodiments of the present application. As Figure 6 shown, the controller 6 of the embodiments comprises a processor 60, a memory 61 and a computer program 62 stored in the memory 61 and executable on the processor 60. The processor 60 implements the steps in the above-mentioned various engine oil thermal management system control method embodiments when executing the computer program 62, for example Figure 3The steps S101-S102 are shown. Alternatively, the processor 60 implements the functions of the modules / units in the above-mentioned apparatus embodiments when executing the computer program 62, for example Figure 5 The functions of the modules 110-120 are shown.

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

[0183] The controller 6 can include, but is not limited to, the processor 60 and the memory 61. Those skilled in the art can understand that Figure 6 The controller 6 is merely an example and does not constitute a limitation on the controller 6, and can include more or fewer components than those shown, or combine certain components, or different components, for example, the controller can also include an input / output device, a network access device, a bus, etc.

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

[0185] The memory 61 can be an internal storage unit of the controller 6, such as a hard disk or a memory of the controller 6. The memory 61 can 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 can also include both the internal storage unit and the external storage device of the controller 6. The memory 61 is used to store the computer program and other programs and data required by the controller. The memory 61 can also be used to temporarily store data that has been output or will be output.

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

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

[0188] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional units and modules is exemplified, and in actual application, the above functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit, and the integrated unit can be realized in the form of hardware or in the form of software functional unit. In addition, the specific names of each functional unit and module are only for easy distinction, and do not limit the protection scope of the application. The specific working process of the units and modules in the system can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0189] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0190] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0191] In the embodiments provided in the present application, it should be understood that the disclosed apparatus / controller and method can be implemented in other ways. For example, the apparatus / controller embodiments described above are merely schematic, for example, the division of the modules or units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or components shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0192] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0193] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0194] The integrated module / unit, if implemented in the form of a software functional unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the above-mentioned embodiments can also be implemented by a computer program instructing related hardware, and the computer program can be stored in a computer readable storage medium. The computer program can implement the steps of the above-mentioned engine oil thermal management system control method embodiments when executed by a processor. The computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms. The computer readable medium can include any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the contents included in the computer readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.

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

[0196] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A control method of an engine oil thermal management system, characterized by, 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; output ends of the oil flow distribution device are in communication with the lubricating component and the cooling component respectively; the heating device is used for heating the oil in the oil pan; The method comprises: controlling the heating device to start and heat the oil in the oil pan when the oil temperature in the oil pan is lower than a first temperature threshold value; controlling the working state of the bypass device and the oil flow proportion of the oil flow distribution device to the cooling component and the lubricating component based on the oil temperature and the working condition of the engine; the controlling the working state of the bypass device based on the oil temperature and the working condition of the engine comprises: if the oil temperature is less than a preset temperature value and the engine is in a corresponding working condition, controlling the bypass pipeline of the bypass device to be turned on and the main pipeline to be turned off; wherein the smaller the load of the working condition of the engine is, the higher the preset temperature value is.

2. The control method of an engine oil thermal management system according to claim 1, characterized by, the preset temperature value comprises a third temperature threshold value, a fourth temperature threshold value and a fifth temperature threshold value; the working condition of the engine comprises a low load working condition, a medium load working condition and a high load working condition; the if the oil temperature is less than a preset temperature value and the engine is in a corresponding working condition, controlling the bypass pipeline of the bypass device to be turned on and the main pipeline to be turned off comprises: if the engine is in the low load working condition and the oil temperature is less than the third temperature threshold value, controlling the bypass pipeline of the bypass device to be turned on and the main pipeline to be turned off; if the engine is in the medium load working condition and the oil temperature is less than the fourth temperature threshold value, controlling the bypass pipeline of the bypass device to be turned on and the main pipeline to be turned off; if the engine is in the high load working condition and the oil temperature is less than the fifth temperature threshold value, controlling the bypass pipeline of the bypass device to be turned on and the main pipeline to be turned off; the third temperature threshold value is less than the first temperature threshold value and greater than the fourth temperature threshold value, and the fourth temperature threshold value is greater than the fifth temperature threshold value.

3. The control method of an engine oil thermal management system according to claim 1, characterized by, the controlling the oil flow proportion of the oil flow distribution device to the cooling component and the lubricating component based on the oil temperature and the working condition of the engine comprises: if the oil temperature is less than a preset temperature value and the engine is in a corresponding working condition, controlling the oil flow distribution device to reduce the oil flow proportion of the cooling component and increase the oil flow proportion of the lubricating component.

4. The control method of an engine oil thermal management system according to claim 3, characterized by, the oil flow distribution device comprises an electromagnetic switch valve; an input end of the electromagnetic switch valve is in communication with the output end of the oil cooler, and an output end of the electromagnetic switch valve is in communication with the cooling component; the cooling component comprises a piston cooling nozzle. if the engine oil temperature is less than a preset temperature value and the engine is in a corresponding operating condition, controlling the engine oil flow distribution device to reduce the engine oil flow proportion of the cooling component, comprising: if the engine is in a low load condition and the engine oil temperature is less than a third temperature threshold, controlling the electromagnetic switch valve to be turned off, otherwise controlling the electromagnetic switch valve to be turned on; if the engine is in a medium load condition and the engine oil temperature is less than a fourth temperature threshold, controlling the electromagnetic switch valve to be turned off, otherwise controlling the electromagnetic switch valve 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, controlling the electromagnetic switch valve to be turned off, otherwise controlling the electromagnetic switch valve to be turned on; 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.

5. The control method of an engine oil thermal management system according to claim 3, characterized by, the lubricating components comprise a plurality of; if the engine oil temperature is less than a preset temperature value and the engine is in a corresponding operating condition, increasing the engine oil flow proportion of the lubricating components, comprising: if the engine is in a low load condition and the engine oil temperature is less than a third temperature threshold, controlling the engine oil flow distribution device to distribute the inflowing engine oil to each lubricating component according to a first flow distribution proportion; if the engine is in a medium load condition and the engine oil temperature is less than a fourth temperature threshold, controlling the engine oil flow distribution device to distribute the inflowing engine oil to each lubricating component according to a second flow distribution proportion; if the engine is in a high load condition and the engine oil temperature is less than a fifth temperature threshold, controlling the engine oil flow distribution device to distribute the inflowing engine oil to each lubricating component according to a third flow distribution proportion; 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.

6. The control method of an engine oil thermal management system according to claim 5, characterized by, the engine oil flow distribution device comprises a multi-way electromagnetic proportional valve; and the controlling of the engine oil flow distribution device to distribute the inflowing engine oil to each lubricating component according to a first flow distribution proportion comprises: determining a target opening degree of the corresponding electromagnetic proportional valve of each lubricating component based on the first flow distribution proportion; adjusting the opening degree of the electromagnetic proportional valve of each lubricating component to the corresponding target opening degree.

7. The control method of an engine oil thermal management system according to any one of claims 1 to 6, characterized by, after the controlling of the heating device to start, the method further comprises: controlling the heating device to stop working when the engine oil temperature of the oil pan is higher than a second temperature threshold.

8. A controller comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, the processor executes the computer program to realize the steps of the control method of the engine oil thermal management system according to any one of claims 1 to 7.

9. An engine oil thermal management system characterized by, comprising: the controller according to claim 8.

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