Engine lubricating and cooling control system and control method thereof

Abstract

The invention relates to an engine lubricating and cooling control system and a control method thereof.The engine lubricating and cooling control system comprises an engine oil pump, an oil supply channel, a flow adjusting part, a control part and a plurality of cooling nozzles; one end of the oil supply channel communicates with the oil pump; the cooling nozzle is arranged at the inner bottom of the cylinder; the flow adjusting part is connected with the other end of the oil supply channel and the cooling nozzle, and the flow adjusting part is used for controlling the oil outlet amount of the cooling nozzle; the control part is connected with the oil pump and the flow adjusting part and used for obtaining the current operation parameters of the engine and the current state parameters of the oil in real time so as to control the flow adjusting part and the oil pump to adjust the oil outlet amount of the cooling nozzle according to the current operation parameters of the engine and the current state parameters of the oil. According to the engine lubricating and cooling control system, the oil outlet amount of the cooling nozzle can be adjusted according to the current operation parameters of the engine and the current state parameters of the engine oil, so that the invalid oil amount is reduced, and the cooling performance of the air cylinder is improved.

Description

Technical Field

[0001] The present application relates to the technical field of engines, and in particular to an engine lubrication and cooling control system and a control method thereof. Background Art

[0002] The automobile engine is an internal combustion engine. The core component of the engine is the cylinder. The main function of the cylinder is to perform a four-stroke cycle to convert the energy generated by the combustion of the mixture of fuel (gasoline or diesel) and air into mechanical energy, which drives the piston to move and thus propels the vehicle forward. However, the cylinder generates a lot of heat during operation. If it is not cooled in time, it will affect the stability and safety of the engine operation.

[0003] In the related art, the main focus is on enhancing cooling and lubrication performance, so a plurality of nozzles that can spray engine oil are usually arranged in the cylinder, so that during the operation of the engine, that is, during the operation of the cylinder, the inner wall of the cylinder and the bottom of the piston are periodically sprayed for cooling, so as to improve the cooling and lubrication capacity of the engine, thereby ensuring the normal operation of the engine. However, due to the large difference in the heat generated by the cylinder at different stages of the operation process, the above-mentioned method of periodically spraying the inner wall of the cylinder and the bottom of the piston through the nozzle is prone to the problem of increased invalid oil, resulting in poor cooling performance.

[0004] In other words, the existing technologies mainly focus on enhancing cooling and lubrication performance, and some patents also have multi-cooling nozzle solutions, but they only improve the cooling and lubrication capabilities of the engine wall.

[0005] Therefore, the present application provides an engine lubrication and cooling control system, which controls the flow regulating component and the oil pump to adjust the oil output of the cooling nozzle according to the current operating parameters of the engine and the current state parameters of the oil through the control component. Purpose 1: To achieve no oil spraying in the second half of the compression stroke of the engine and the first half of the power stroke, and stop cooling any wall surface. At this time, the temperature of the cylinder liner wall increases, and the working fluid in the cylinder reduces heat transfer to it, thereby increasing thermal efficiency; Purpose 2: To achieve the second half of the working stroke, the solenoid valve is opened, and all cooling nozzles start working to cool the piston and the wall surface. The amount of oil is concentrated, and the amount is larger than that of a conventional engine, so that the piston and the wall surface are cooled rapidly; the solenoid valve is continuously opened during the entire exhaust stroke, the intake stroke, and the first half of the compression stroke, so as to reduce the temperature in the engine cylinder, ensure the engine charging efficiency, improve the thermal efficiency, and also ensure the engine lubrication effect. Summary of the invention

[0006] Based on this, it is necessary to provide an engine lubrication cooling control system and a control method thereof to address the above-mentioned technical problems, aiming to control the flow regulating component and the oil pump to adjust the oil output of the cooling nozzle according to the current operating parameters of the engine and the current state parameters of the engine oil through the control component, so as to achieve no oil spraying in the second half of the engine compression stroke and the first half of the power stroke, and stop cooling any wall surface. At this time, the temperature of the cylinder liner wall increases, and the working fluid in the cylinder reduces heat transfer to it, thereby increasing thermal efficiency; in addition, it can also achieve the second half of the working stroke, the solenoid valve opens, all cooling nozzles start working, cooling the piston and wall surface, the amount of oil is concentrated, the amount is larger than that of conventional engines, and the piston and wall surface are cooled rapidly; the solenoid valve is continuously opened during the entire exhaust stroke, the intake stroke and the first half of the compression stroke, thereby achieving the goal of reducing the temperature in the engine cylinder, ensuring the engine charging efficiency, improving the thermal efficiency, and at the same time ensuring the engine lubrication effect.

[0007] In a first aspect, the present application provides an engine lubrication and cooling control system, which is applicable to a cylinder. The engine lubrication and cooling control system comprises:

[0008] Oil pump;

[0009] An oil supply passage, one end of which is connected to the oil pump;

[0010] A plurality of cooling nozzles are arranged at the inner bottom of the cylinder;

[0011] A flow regulating member connected to the other end of the oil supply channel and the cooling nozzle, the flow regulating member being used to control the oil output of the cooling nozzle;

[0012] The control component is connected to the oil pump and the flow regulating component, and is used to obtain the current operating parameters of the engine and the current state parameters of the oil in real time, so as to control the flow regulating component and the oil pump to adjust the oil output of the cooling nozzle according to the current operating parameters of the engine and the current state parameters of the oil.

[0013] In one embodiment, the flow regulating member includes a solenoid valve connected to the oil supply passage.

[0014] In one embodiment, the oil supply passage includes a main oil passage and a branch oil passage that are connected to each other, the main oil passage is connected to the oil pump, and the branch oil passage is connected to the solenoid valve.

[0015] In one embodiment, the diameter of the branch oil passage is smaller than the diameter of the main oil passage.

[0016] In one embodiment, the controller includes an engine control unit connected to both the oil pump and the solenoid valve.

[0017] In one embodiment, the cooling nozzles are divided into multiple groups, each group has at least one cooling nozzle, wherein at least one group of cooling nozzles is used to spray the inner wall of the cylinder, and at least one group of cooling nozzles is used to spray the bottom of the piston.

[0018] In one embodiment, the engine lubrication and cooling control system also includes an intake duct and an exhaust duct connected to the top of the cylinder. A first valve and a second valve are also provided at the top of the cylinder. The first valve is used to control the opening and closing of the intake duct, and the second valve is used to control the opening and closing of the exhaust duct.

[0019] In a second aspect, the present application provides a control method, which is applied to any engine lubrication and cooling control system provided in the first aspect, and the control method comprises the following steps:

[0020] After the engine is started, the control unit obtains the current operating parameters of the engine and the current state parameters of the engine oil in real time;

[0021] According to the current operating parameters of the engine and the current state parameters of the engine oil, the flow regulating element and the engine oil pump are controlled to adjust the current oil output of the cooling nozzle.

[0022] In some embodiments, according to the current operating parameters of the engine and the current state parameters of the engine oil, controlling the flow regulating element and the oil pump to adjust the current oil output of the cooling nozzle includes:

[0023] Determine whether the preset system low-heat cooling condition is met according to the current operating parameters of the engine and the current state parameters of the engine oil;

[0024] Under the condition of low-heat cooling of the system, according to the preset mapping relationship table of engine operating parameters, oil state parameters and cooling strategies, a target cooling strategy corresponding to the current operating parameters of the engine and the current state parameters of the oil is determined, the target cooling strategy includes the opening time, opening duration and oil flow rate of the flow regulating component, and the flow regulating component and the oil pump are controlled to adjust the current oil output of the cooling nozzle according to the target cooling strategy;

[0025] When the system low-heat cooling conditions are not met, the flow adjustment component is controlled to be normally open, and the oil pump speed is controlled to reach a preset speed threshold.

[0026] In some embodiments, the current operating parameters of the engine include the engine speed, the engine load and the cooling water temperature; the current state parameters of the engine oil include the engine oil temperature and the engine oil pressure.

[0027] The above-mentioned engine lubrication and cooling control system is suitable for a cylinder, and the engine lubrication and cooling control system includes an oil pump, an oil supply channel, a flow regulating component, a control component and multiple cooling nozzles; one end of the oil supply channel is connected to the oil pump; the cooling nozzle is arranged at the inner bottom of the cylinder; the flow regulating component is connected to the other end of the oil supply channel and the cooling nozzle, and the flow regulating component is used to control the oil output of the cooling nozzle; the control component is connected to the oil pump and the flow regulating component, and the control component is used to obtain the current operating parameters of the engine and the current state parameters of the oil in real time, so as to control the flow regulating component and the oil pump to adjust the oil output of the cooling nozzle according to the current operating parameters of the engine and the current state parameters of the oil. The engine lubrication and cooling control system in the present application controls the flow regulating part and the oil pump to adjust the oil output of the cooling nozzle according to the current operating parameters of the engine and the current state parameters of the oil through the control part, thereby reducing the invalid oil volume, reducing the invalid oil pump power, and thus improving the cooling performance of the cylinder; at the same time, according to the current operating parameters of the engine and the current state parameters of the oil, the stroke process of the engine can be determined, so that the oil is not sprayed in the second half of the compression stroke of the engine and the first half of the power stroke, and the wall surface in the cylinder liner of any cylinder is stopped. At this time, the wall surface temperature in the cylinder liner of the cylinder increases, and the working medium in the cylinder reduces heat transfer to it, thereby increasing thermal efficiency; in addition, it can also be achieved that in the second half of the power stroke, the solenoid valve is opened, all cooling nozzles start to work, cooling the piston and the wall surface, the oil volume is concentrated, the volume is larger than that of conventional engines, and the piston and the wall surface are quickly cooled; the solenoid valve is continuously opened during the entire exhaust stroke, the intake stroke and the first half of the compression stroke, thereby reducing the temperature in the engine cylinder, ensuring the engine charging efficiency, and improving the thermal efficiency; in addition, the engine lubrication effect can also be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are 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 creative work.

[0029] FIG1 is a schematic diagram of the structure of an engine lubrication and cooling control system in some embodiments of the present application;

[0030] FIG. 2 is a flow chart of a control method applicable to an engine lubrication and cooling control system in some embodiments of the present application.

[0031] Description of Figure Numbers:

[0032] 100, cylinder; 110, intake pipe; 120, exhaust pipe; 130, first valve; 140, second valve; 200, oil pump; 300, oil supply channel; 310, main oil channel; 320, branch oil channel; 400, cooling nozzle; 500, solenoid valve; 600, engine control unit; 700, piston. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "vertical", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there can be a intermediate element at the same time.

[0037] The engine stroke includes intake, compression, power and exhaust strokes. The crankshaft angle of each stroke is about 180°CA. A large amount of heat transfer loss will be generated in the power stroke and exhaust stroke of the engine operation process. At the same time, the wall temperature of the piston, cylinder liner and other parts is relatively high, which will heat the intake air during the intake process and cause the charging efficiency to decrease. If the wall temperature can be reduced during the intake stroke, it will help improve the charging efficiency, increase the intake volume, improve the combustion and thermal process, and improve the thermal efficiency.

[0038] In the related technologies, the main focus is on enhancing cooling and lubrication performance, so a plurality of nozzles that can spray engine oil are usually arranged in the cylinder, so that during the operation of the engine, that is, during the operation of the cylinder, the inner wall of the cylinder and the bottom of the piston are periodically sprayed for cooling, so as to improve the cooling and lubrication capacity of the engine, thereby ensuring the normal operation of the engine. However, due to the large difference in the heat generated by the cylinder at different stages of the operation process, the above-mentioned method of periodically spraying the inner wall of the cylinder and the bottom of the piston through the nozzle is prone to the problem of increased invalid oil, resulting in poor cooling performance; in addition, the existing technologies mainly focus on enhancing cooling and lubrication performance, and some patents are also multi-cooling nozzle solutions, but only for improving the cooling and lubrication capacity of the engine wall.

[0039] In order to solve the above technical problems, in the first aspect, referring to Figure 1, an embodiment of the present application provides an engine lubrication and cooling control system, which is suitable for a cylinder 100, and the engine lubrication and cooling control system includes an oil pump 200, an oil supply channel 300, a flow regulating member, a control member and a plurality of cooling nozzles 400; one end of the oil supply channel 300 is connected to the oil pump 200; the cooling nozzle 400 is arranged at the inner bottom of the cylinder 100; the flow regulating member is connected to the other end of the oil supply channel 300 and the cooling nozzle 400, and the flow regulating member is used to control the oil output of the cooling nozzle 400; the control member is connected to the oil pump 200 and the flow regulating member, and the control member is used to obtain the current operating parameters of the engine and the current state parameters of the oil in real time, so as to control the flow regulating member and the oil pump 200 to adjust the oil output of the cooling nozzle 400 according to the current operating parameters of the engine and the current state parameters of the oil.

[0040] Among them, the oil pump 200 plays a vital role in the engine lubrication and cooling control system. Its main function is to transport, pressurize and regulate the oil flow to provide necessary lubrication and cooling for various engine components. By ensuring the circulation of oil, the oil pump 200 can reduce wear between components, lower engine temperature, clean the inside of the engine, ensure the sealing of the combustion chamber, thereby improving the reliability and life of the engine.

[0041] The current operating parameters of the engine refer to the real-time working status data of the engine at a certain moment. These parameters are mainly used to monitor and control the working performance of the engine. For example, the current operating parameters of the engine include the engine speed, engine load and cooling water temperature. The engine speed is the number of rotations of the engine crankshaft per minute, which is used to reflect the running speed of the engine; the engine load is the workload borne by the engine at a certain speed, usually expressed as a percentage, which is used to reflect the output power demand of the engine and is used to adjust the fuel injection amount and ignition advance angle, etc.; the cooling water temperature is the temperature of the engine coolant (usually a mixture of coolant and antifreeze), which is used to reflect the temperature state of the engine and is used to control the operation of cooling systems such as fans and thermostats to prevent the engine from overheating.

[0042] The current state parameters of the engine oil refer to the real-time state data of the engine oil at a certain moment. These parameters are mainly used to monitor the health and performance of the engine oil. The current state parameters of the engine oil include the engine oil temperature and the engine oil pressure. The engine oil temperature refers to the temperature of the engine oil inside the engine, which is used to control the flow of the engine oil pump 200 and the operation of the engine lubrication and cooling control system to prevent the engine oil from overheating or overcooling; the engine oil pressure refers to the pressure of the engine oil in the engine lubrication and cooling control system, which is used to monitor whether the engine lubrication and cooling control system is working properly to prevent parts from wearing out due to insufficient lubrication.

[0043] Specifically, the control component obtains the engine speed, engine load and cooling water temperature, oil temperature and oil pressure in real time, and based on these acquired data, combined with a preset control strategy, controls the flow regulating component and the oil pump 200 to adjust the oil output of the cooling nozzle 400.

[0044] The engine lubrication and cooling control system in this embodiment controls the flow regulating component and the oil pump 200 to adjust the oil output of the cooling nozzle 400 according to the current operating parameters of the engine and the current state parameters of the oil through the control component, thereby reducing the amount of invalid oil, reducing the invalid oil pump power, and thus improving the cooling performance of the cylinder 100; at the same time, according to the current operating parameters of the engine and the current state parameters of the oil, the stroke process of the engine can be determined, so that the oil is not sprayed in the second half of the compression stroke of the engine and the first half of the power stroke, and the wall surface in the cylinder liner of any cylinder is stopped from being cooled. At this time, the wall surface temperature in the cylinder liner of the cylinder increases, and the working medium in the cylinder reduces heat transfer to it, thereby increasing thermal efficiency; in addition, the solenoid valve can be opened in the second half of the power stroke, and all cooling nozzles start to work to cool the piston and the wall surface, the oil volume is concentrated, the volume is larger than that of a conventional engine, and the piston and the wall surface are quickly cooled; the solenoid valve is continuously opened during the entire exhaust stroke, the intake stroke, and the first half of the compression stroke, thereby reducing the temperature in the engine cylinder, ensuring the engine charging efficiency, and improving the thermal efficiency; in addition, the engine lubrication effect can also be ensured.

[0045] 1 , in some embodiments, the flow regulating member includes a solenoid valve 500 , and the solenoid valve 500 is connected to the oil supply passage 300 .

[0046] Among them, when the solenoid valve 500 is opened, the cooling nozzle starts to work; when the solenoid valve 500 is closed, the cooling nozzle stops working, the injection pressure of the cooling nozzle 400 is controlled by the oil pump 200, and the injection oil amount of the cooling nozzle 400 is jointly controlled by the oil pump 200 and the solenoid valve 500.

[0047] Specifically, the flow rate and injection timing of the engine oil can be controlled by the solenoid valve 500. In addition, the solenoid valve 500 has the characteristics of fast response and high-precision control, and can complete the opening and closing actions within milliseconds to achieve precise regulation of the engine oil flow rate, thereby helping to further improve the accuracy and reliability of the cooling effect.

[0048] 1 , in some embodiments, the oil supply passage 300 includes a main oil passage 310 and a branch oil passage 320 that are connected to each other. The main oil passage 310 is connected to the oil pump 200 , and the branch oil passage 320 is connected to the solenoid valve 500 .

[0049] Among them, the main oil channel 310 is responsible for conveying oil from the oil pump 200, and the branch oil channel 320 is connected to the solenoid valve 500 to achieve fine distribution of oil. The oil pump 200 provides oil and operating pressure to the main oil channel 310, that is, the pressure of the main oil channel 310 is established by the operation of the oil pump 200 and is affected by the speed of the oil pump 200; the main oil channel 310 supplies oil to the branch oil channel 320, and the opening and closing of the branch oil channel 320 is controlled by the solenoid valve 500. The solenoid valve 500 receives the signal of the control component to adjust its own opening time and duration, that is, the opening duration, and the branch oil channel 320 starts to provide oil and pressure to the cooling nozzle 400, and cannot provide oil and pressure when it is closed.

[0050] Specifically, through the structural design of the main oil channel 310 and the oil distribution channel 320, the system can efficiently transport the engine oil to the area that needs cooling, and at the same time, through the cooperation of the oil distribution channel 320 and the solenoid valve 500, the engine oil flow rate can be precisely controlled.

[0051] 1 , in some embodiments, the diameter of the oil channel 320 is smaller than the diameter of the main oil channel 310 .

[0052] Specifically, setting the diameter of the oil distribution channel 320 to be smaller than the diameter of the main oil channel 310 helps ensure that the pressure of the oil flow in the oil distribution channel 320 remains high, thereby providing more precise oil injection, ensuring cooling effects while avoiding oil waste.

[0053] 1 , in some embodiments, the controller includes an engine control unit 600 , and the engine control unit 600 is connected to both the oil pump 200 and the solenoid valve 500 .

[0054] The engine control unit 600 is also called the ECU control unit, which is responsible for obtaining the operating parameters of the engine and the state parameters of the engine oil in real time, and controlling the engine oil pump 200 and the solenoid valve 500 .

[0055] Specifically, the ECU control unit has powerful data processing capabilities and real-time control functions, and can make intelligent adjustments based on complex operating conditions to ensure system stability and performance optimization.

[0056] 1 , in some embodiments, the cooling nozzles 400 are divided into a plurality of groups, each group having at least one cooling nozzle 400 , wherein at least one group of cooling nozzles 400 is used to spray the inner wall of the cylinder 100 , and at least one group of cooling nozzles 400 is used to spray the bottom of the piston 700 .

[0057] Among them, each cooling nozzle 400 is connected to the oil distribution channel 320 and the solenoid valve 500, and the cooling nozzles 400 are divided into multiple groups, and spray the inner wall of the cylinder 100 and the bottom of the piston 700 respectively to achieve precise cooling of different high-temperature areas.

[0058] Specifically, the design of multiple groups of cooling nozzles 400 can accurately cool different high-temperature areas inside the engine, improve the coverage and effectiveness of the cooling effect, reduce local thermal stress, and extend the life of the engine.

[0059] Referring to Figure 1, in some embodiments, the engine lubrication and cooling control system also includes an intake pipe 110 and an outlet pipe 120 connected to the top of the cylinder 100. A first valve 130 and a second valve 140 are also provided at the top of the cylinder 100. The first valve 130 is used to control the opening and closing of the intake pipe 110, and the second valve 140 is used to control the opening and closing of the outlet pipe 120.

[0060] Among them, the first valve 130 and the second valve 140 control the opening and closing of the intake and exhaust respectively, ensuring the optimal air / fuel ratio in the combustion process, and can accurately control the amount of air intake and exhaust gas discharge, optimize combustion efficiency, and improve the power output and fuel economy of the engine.

[0061] Specifically, the movement of the first valve 130 controls the opening and closing of the intake pipe 110, and the movement of the second valve 140 controls the opening and closing of the outlet pipe 120, thereby ensuring the intake of fresh air and the discharge of exhaust gas during the operation of the engine.

[0062] The engine lubrication and cooling control system in the present application controls the flow regulating component and the oil pump 200 to adjust the oil output of the cooling nozzle 400 according to the current operating parameters of the engine and the current state parameters of the engine oil through the control component, thereby reducing the invalid oil volume, reducing the invalid oil pump power, and thus improving the cooling performance of the cylinder 100; in addition, through the on-off of the solenoid valve 500 and the control of the oil pump 200, the high temperature moment and the low temperature moment of the wall temperature of the engine combustion chamber are synchronized, and the surface temperature of the cylinder 100 wall and the top surface of the piston 700 are periodically changed, thereby achieving the effect of reducing heat transfer, taking into account the charging efficiency, and improving the thermal efficiency.

[0063] In a second aspect, an embodiment of the present application provides a control method, which is applied to any engine lubrication and cooling control system provided in the first aspect above, and the control method comprises the following steps:

[0064] After the engine is started, the control unit obtains the current operating parameters of the engine and the current state parameters of the engine oil in real time;

[0065] According to the current operating parameters of the engine and the current state parameters of the engine oil, the flow regulating element and the oil pump 200 are controlled to adjust the current oil output of the cooling nozzle 400.

[0066] Specifically, according to the above content, the current operating parameters of the engine refer to the real-time working status data of the engine at a certain moment. These parameters are mainly used to monitor and control the working performance of the engine. The current operating parameters of the engine include the engine speed, engine load and cooling water temperature. The current state parameters of the engine oil refer to the real-time state data of the engine oil at a certain moment. These parameters are mainly used to monitor the health and performance of the engine oil. The current state parameters of the engine oil include the engine oil temperature and the engine oil pressure.

[0067] Specifically, the control component obtains the engine speed, engine load and cooling water temperature, oil temperature and oil pressure in real time, and based on these acquired data, combined with a preset control strategy, controls the flow regulating component and the oil pump 200 to adjust the oil output of the cooling nozzle 400.

[0068] In some embodiments, according to the current operating parameters of the engine and the current state parameters of the engine oil, controlling the flow regulator and the oil pump 200 to adjust the current oil output of the cooling nozzle 400 includes:

[0069] Determine whether the preset system low-heat cooling condition is met according to the current operating parameters of the engine and the current state parameters of the engine oil;

[0070] Under the condition of low-heat cooling of the system, according to the preset mapping relationship table of engine operating parameters, oil state parameters and cooling strategies, a target cooling strategy corresponding to the current operating parameters of the engine and the current state parameters of the oil is determined, that is, the above-mentioned preset control strategy, the target cooling strategy includes the opening time, opening duration and oil flow rate of the flow regulating member, and controls the flow regulating member and the oil pump 200 to adjust the current oil output of the cooling nozzle 400 according to the target cooling strategy;

[0071] When the system low-heat cooling conditions are not met, the flow regulating element is controlled to be normally open, and the speed of the oil pump 200 is controlled to reach a preset speed threshold.

[0072] The flow regulating component is the solenoid valve 500 mentioned above, and the control component is the engine control unit 600, which can be an engine control chip. The preset system low-heat cooling condition is a condition set for the cooling demand of the control system when the internal temperature is not very high, and under this condition, a mapping relationship table of engine operating parameters, oil state parameters and cooling strategies is preset, in which the corresponding target cooling strategy can be determined according to the current operating parameters of the engine and the current state parameters of the oil, that is, the cooling strategy that the engine control unit 600 needs to execute next.

[0073] According to the above content, the stroke of the engine includes intake, compression, power and exhaust strokes. In the power stroke and exhaust stroke of the engine operation process, a large amount of heat transfer loss will be generated. At the same time, the wall temperature of the piston 700, cylinder liner, etc. is relatively high, which will heat the intake air during the intake process and cause the charging efficiency to decrease. If the wall temperature can be reduced during the intake stroke, it will be beneficial to improve the charging efficiency, increase the intake volume, improve the combustion and thermal process, and improve the thermal efficiency. In this embodiment, the current stroke of the engine can also be determined based on the operating parameters of the engine and the oil state parameters. The cooling strategy includes the opening time, opening duration and oil flow rate of the solenoid valve 500.

[0074] In the intake stroke and the first half of the compression stroke of the engine, the solenoid valve 500 is in the open state, and in the second half of the compression stroke and the first half of the power stroke of the engine, the solenoid valve 500 is in the closed state. In the second half of the compression stroke of the engine and the first half of the power stroke, no oil is sprayed, and cooling of any wall surface is stopped. At this time, the temperature of the cylinder liner wall of the cylinder 100 increases, and the working medium in the cylinder reduces heat transfer to it, thereby increasing thermal efficiency. In the second half of the power stroke, the solenoid valve 500 is opened, and all cooling nozzles 400 start to work, cooling the piston 700 and the wall surface. The amount of oil is concentrated, and the amount is larger than that of conventional engines, so that the piston 700 and the wall surface are quickly cooled; the solenoid valve 500 is continuously opened during the entire exhaust stroke, the intake stroke, and the first half of the compression stroke, thereby reducing the temperature in the engine cylinder, ensuring the engine charging efficiency, improving the thermal efficiency, and also ensuring the lubrication of the engine.

[0075] Specifically, referring to the flowchart shown in Figure 2, after the engine is started, the engine control unit 600 receives engine parameter data, including but not limited to the engine speed, load, cooling water temperature, and oil temperature and oil pressure, to determine whether the preset system low-heat cooling conditions are met. When the preset system low-heat cooling conditions are met, the corresponding target cooling strategy is searched in the preset mapping relationship table of engine operating parameters, oil state parameters and cooling strategies according to the parameter data received by the engine control unit 600, and the engine control unit 600 controls the oil pump 200 and the solenoid valve 500 to execute the target cooling strategy, that is, the engine control unit 600 will output corresponding control signals to the oil pump 200 and the solenoid valve 500 respectively, and the control signal carries data such as the oil output of the oil pump 200, the flow rate of the oil pump 200, the opening time of the solenoid valve 500, the opening duration and the flow rate of the solenoid valve 500.

[0076] When the current state of the cylinder 100 does not meet the preset system low-heat cooling conditions, it means that the current state of the cylinder 100 is in a high-heat state. At this time, the solenoid valve 500 needs to be normally open, and the speed of the oil pump 200 needs to reach the preset speed threshold, which is a preset maximum speed value.

[0077] The control method in the present application determines whether the preset system low-heat cooling condition is reached according to the current operating parameters of the engine and the current state parameters of the oil. When the preset system low-heat cooling condition is reached, the corresponding target cooling strategy is determined according to the mapping relationship table of the preset engine operating parameters, oil state parameters and cooling strategies, and the engine control unit 600 controls the oil pump 200 and the solenoid valve 500 to execute the target cooling strategy, that is, the engine control unit 600 will output corresponding control signals to the oil pump 200 and the solenoid valve 500 respectively, and the control signal carries data such as the oil output of the oil pump 200, the flow rate of the oil pump 200, the opening time and opening duration of the solenoid valve 500, and the flow rate of the solenoid valve 500, thereby reducing the consumption of invalid oil. While ensuring the cooling effect, it can also minimize the waste of cooling oil, which helps to save resources; in addition, it can also achieve the synchronization of the engine combustion wall temperature with the high temperature moment and the low temperature moment in the engine cylinder, and realize the periodic change of the surface temperature of the cylinder 100 wall and the piston 700 top surface, thereby achieving the effect of reducing heat transfer, taking into account the charging efficiency, and improving the thermal efficiency.

[0078] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0079] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An engine lubrication and cooling control system, suitable for a cylinder, characterized in that: The engine lubrication and cooling control system comprises: Oil pump; an oil supply passage, one end of which is in communication with the oil pump; A plurality of cooling nozzles are arranged at the inner bottom of the cylinder; A flow regulating member connected to the other end of the oil supply channel and the cooling nozzle, the flow regulating member being used to control the oil output of the cooling nozzle; A control component is connected to the oil pump and the flow regulating component, and the control component is used to obtain the current operating parameters of the engine and the current state parameters of the oil in real time, so as to control the flow regulating component and the oil pump to adjust the oil output of the cooling nozzle according to the current operating parameters of the engine and the current state parameters of the oil.

2. The engine lubrication and cooling control system according to claim 1, characterized in that: The flow regulating member comprises a solenoid valve, and the solenoid valve is connected to the oil supply passage.

3. The engine lubrication and cooling control system according to claim 2, characterized in that: The oil supply passage comprises a main oil passage and a branch oil passage which are connected to each other. The main oil passage is connected to the oil pump, and the branch oil passage is connected to the solenoid valve.

4. The engine lubrication and cooling control system according to claim 3, characterized in that: The diameter of the oil distribution channel is smaller than the diameter of the main oil channel.

5. The engine lubrication and cooling control system according to claim 2, characterized in that: The controller includes an engine control unit, and the engine control unit is connected to both the oil pump and the solenoid valve.

6. The engine lubrication and cooling control system according to claim 1, characterized in that: The cooling nozzles are divided into multiple groups, each group has at least one cooling nozzle, wherein at least one group of cooling nozzles is used to spray the inner wall of the cylinder, and at least one group of cooling nozzles is used to spray the bottom of the piston.

7. The engine lubrication and cooling control system according to claim 1, characterized in that: It also includes an air intake pipe and an air outlet pipe connected to the top of the cylinder. The top of the cylinder is also provided with a first valve and a second valve. The first valve is used to control the opening and closing of the air intake pipe, and the second valve is used to control the opening and closing of the air outlet pipe.

8. A control method, characterized in that: Applicable to the engine lubrication and cooling control system according to any one of claims 1 to 6, the control method comprising the following steps: After the engine is started, the control unit obtains the current operating parameters of the engine and the current state parameters of the engine oil in real time; According to the current operating parameters of the engine and the current state parameters of the engine oil, the flow regulating component and the engine oil pump are controlled to adjust the current oil output of the cooling nozzle.

9. The control method according to claim 8, characterized in that: The controlling the flow regulating element and the oil pump to adjust the current oil output of the cooling nozzle according to the current operating parameters of the engine and the current state parameters of the oil comprises: Determining whether a preset system low-heat cooling condition is met according to the current operating parameters of the engine and the current state parameters of the engine oil; Under the condition that the low-heat cooling condition of the system is met, a target cooling strategy corresponding to the current operating parameters of the engine and the current state parameters of the oil is determined according to a preset mapping relationship table of engine operating parameters, oil state parameters and cooling strategies, wherein the target cooling strategy includes the opening time, opening duration and oil flow rate of the flow regulating member, and the flow regulating member and the oil pump are controlled to adjust the current oil output of the cooling nozzle according to the target cooling strategy; When the low-heat cooling condition of the system is not met, the flow regulating element is controlled to be normally open, and the speed of the oil pump is controlled to reach a preset speed threshold.

10. The control method according to claim 9, characterized in that: The current operating parameters of the engine include the engine speed, the engine load and the cooling water temperature; the current state parameters of the engine oil include the engine oil temperature and the engine oil pressure.

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