Engine oil cooling system, method and engine

Abstract

The present application provides an engine oil cooling system, method and engine. The engine oil cooling system includes an oil pump, a main oil cooler, an auxiliary oil cooler, a first throttle valve and a second throttle valve; wherein the oil pump is used to pressurize and pump out the oil in the oil pan; the main oil cooler is used to cool the incoming oil and transport the cooled oil to the main oil channel of the engine; the auxiliary oil cooler is used to cool the incoming oil and transport the cooled oil to the main oil channel of the engine; the first throttle valve is used to control the oil flow rate flowing into the main oil cooler; the second throttle valve is used to control the oil flow rate flowing into the auxiliary oil cooler. The above structure enables the engine to select the main oil cooler and / or the auxiliary oil cooler to cool the oil based on the actual operation of the engine, thereby quickly reducing the temperature of the oil entering the main oil channel and ensuring the reliability and durability of the engine.

Description

Technical Field

[0001] The present application relates to the field of engine technology, and in particular to an engine oil cooling system, method and engine. Background Art

[0002] The engine is the heart of the car. Whether the engine can run normally depends largely on the engine cooling water temperature, oil pressure and temperature. The normal range of water temperature, oil temperature and oil pressure is extremely important for the reliable operation of the engine, full performance, extended engine life and reduced consumption. The role of engine oil is even more crucial. Whether the oil pressure and oil temperature are normal is directly related to whether the engine can work normally.

[0003] In the prior art, the temperature of the engine oil will gradually increase during the operation of the engine. The higher the temperature of the engine oil, the thinner it is, and the lubricating ability and oil viscosity will also decrease, resulting in difficulty in forming an oil film of sufficient thickness on the friction surface, and the oil film has poor bearing capacity and is easily damaged under load, so that the parts cannot be properly lubricated, causing excessive wear. At the same time, if the oil viscosity is too low, it will also cause poor sealing of the piston ring, causing blowby and burning of the oil in the combustion chamber, reducing engine power and causing failures. Summary of the invention

[0004] The present application provides an engine oil cooling system, method and engine to solve the problem of excessively high engine oil temperature in the prior art.

[0005] In a first aspect, the present application provides an engine oil cooling system, comprising:

[0006] An oil pump, installed in the oil pan of the engine, for pressurizing and pumping out the oil in the oil pan;

[0007] a main oil cooler, connected to the oil pump, for cooling the inflowing oil and delivering the cooled oil to the main oil channel of the engine;

[0008] an auxiliary oil cooler, connected to the oil pump, for cooling the incoming oil and delivering the cooled oil to the main oil gallery of the engine;

[0009] A first throttle valve, installed on the connecting pipeline between the oil pump and the main engine oil cooler, for controlling the oil flow rate flowing into the main engine oil cooler;

[0010] The second throttle valve is installed on the connecting pipeline between the oil pump and the auxiliary oil cooler, and is used to control the oil flow rate flowing into the auxiliary oil cooler.

[0011] In a possible implementation, the auxiliary oil cooler is an air-cooled oil cooler.

[0012] In a possible implementation, the air-cooled oil cooler is installed at the front end of the vehicle.

[0013] In a possible implementation, the main engine oil cooler is a water-cooled engine oil cooler.

[0014] In a second aspect, the present application provides an engine oil cooling method, which is applied to the engine oil cooling system as described in the first aspect above, the method comprising:

[0015] Get the current vehicle speed;

[0016] The opening and closing of the first throttle valve and the second throttle valve are controlled according to the current vehicle speed, so that the main oil cooler and / or the auxiliary oil cooler cool the oil.

[0017] In a possible implementation, controlling the opening and closing of the first throttle valve and the second throttle valve according to the current vehicle speed so that the main oil cooler and / or the auxiliary oil cooler cools the oil includes:

[0018] If the current vehicle speed is less than or equal to the first preset speed, the second throttle valve is controlled to be closed, and the first throttle valve is controlled to be opened, so that the main engine oil cooler cools the engine oil;

[0019] If the current vehicle speed is greater than the first preset speed and less than or equal to the second preset speed, the first throttle valve and the second throttle valve are controlled to open, so that the main oil cooler and the auxiliary oil cooler cool the oil together;

[0020] If the current vehicle speed is greater than the second preset speed, the first throttle valve is controlled to be closed, and the second throttle valve is controlled to be opened, so that the auxiliary oil cooler cools the oil;

[0021] The first preset speed is lower than the second preset speed.

[0022] In a possible implementation, after controlling both the first throttle valve and the second throttle valve to open if the current vehicle speed is greater than the first preset speed and less than or equal to the second preset speed, the method further includes:

[0023] The openings of the first throttle valve and the second throttle valve are adjusted according to the current vehicle speed, and the opening of the first throttle valve is negatively correlated with the current vehicle speed, and the opening of the second throttle valve is positively correlated with the current vehicle speed.

[0024] In a possible implementation, if the current vehicle speed is greater than the second preset speed, controlling the first throttle valve to close and controlling the second throttle valve to open so that the auxiliary oil cooler cools the oil includes:

[0025] If the current vehicle speed is greater than the second preset speed and the oil temperature of the main oil gallery is less than a first preset temperature threshold, the first throttle valve is controlled to be closed and the second throttle valve is controlled to be opened so that the auxiliary oil cooler cools the oil;

[0026] Accordingly, the method further comprises:

[0027] If the current vehicle speed is greater than the second preset speed and the oil temperature of the main oil channel is greater than or equal to the first preset temperature threshold, the first throttle valve and the second throttle valve are controlled to open so that the main oil cooler and the auxiliary oil cooler cool the oil together.

[0028] In a possible implementation, if the current vehicle speed is greater than the second preset speed, controlling the first throttle valve to close and controlling the second throttle valve to open so that the auxiliary oil cooler cools the oil includes:

[0029] If the current vehicle speed is greater than the second preset speed and the oil temperature of the oil pan is less than a second preset temperature threshold, the first throttle valve is controlled to be closed and the second throttle valve is controlled to be opened so that the auxiliary oil cooler cools the oil;

[0030] Accordingly, the method further comprises:

[0031] If the current vehicle speed is greater than the second preset speed and the oil temperature of the oil pan is greater than or equal to the second preset temperature threshold, the first throttle valve and the second throttle valve are controlled to open so that the main oil cooler and the auxiliary oil cooler cool the oil together.

[0032] In a third aspect, the present application provides an engine, comprising an engine oil cooling system as described in any possible implementation manner of the first aspect above.

[0033] The embodiment of the present application provides an engine oil cooling system, method and engine, wherein the engine oil cooling system includes an oil pump, a main oil cooler, an auxiliary oil cooler, a first throttle valve and a second throttle valve; wherein the oil pump is installed in the oil pan of the engine, and is used to pressurize and pump out the oil in the oil pan; the main oil cooler is connected to the oil pump, and is used to cool the inflowing oil and transport the cooled oil to the main oil channel of the engine; the auxiliary oil cooler is connected to the oil pump, and is used to cool the incoming oil and transport the cooled oil to the main oil channel of the engine; the first throttle valve is installed on the connecting pipeline between the oil pump and the main oil cooler, and is used to control the oil flow rate flowing into the main oil cooler; the second throttle valve is installed on the connecting pipeline between the oil pump and the auxiliary oil cooler, and is used to control the oil flow rate flowing into the auxiliary oil cooler. The above structure enables the engine to select the main oil cooler and / or auxiliary oil cooler to cool the oil based on the actual operating conditions, thereby quickly reducing the temperature of the oil entering the main oil channel, preventing excessive oil temperature from causing wear of components and causing malfunctions, etc., thereby ensuring the reliability and durability of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0035] Figure 1 is a structural schematic diagram of an engine oil cooling system provided in an embodiment of the present application;

[0036] Figure 2 is a schematic diagram of the specific structure of the engine oil cooling system provided in an embodiment of the present application;

[0037] Figure 3 is a flow chart of an implementation of the engine oil cooling method provided in an embodiment of the present application;

[0038] Figure 4 is a schematic structural diagram of an engine oil cooling device provided in an embodiment of the present application;

[0039] Figure 5 It is a schematic diagram of an engine controller provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0041] In order to make the purpose, technical solutions and advantages of the present application clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

[0042] Figure 1 This is a schematic diagram of the structure of the engine oil cooling system provided in the embodiment of the present application, and the structure is described in detail as follows:

[0043] An oil pump 10 is installed in the oil pan of the engine and is used to pressurize and pump out the oil in the oil pan;

[0044] A main oil cooler 20, which is in communication with the oil pump 10, is used to cool the inflowing oil and deliver the cooled oil to the main oil gallery of the engine;

[0045] an auxiliary oil cooler 30, which is in communication with the oil pump 10 and is used to cool the incoming oil and deliver the cooled oil to the main oil gallery of the engine;

[0046] A first throttle valve 40 is installed on the connecting pipeline between the oil pump 10 and the main oil cooler 20, and is used to control the oil flow rate flowing into the main oil cooler 20;

[0047] The second throttle valve 50 is installed on the connecting pipeline between the oil pump 10 and the auxiliary oil cooler 30 , and is used to control the oil flow rate flowing into the auxiliary oil cooler 30 .

[0048] Specifically, Figure 1 As shown in the figure, the oil pan and the main oil channel of the engine are both components of the lubrication system of the engine. The main oil channel of the engine is an important part of the lubrication system. It is directly cast on the engine cylinder block and cylinder head and is used to transport lubricating oil to various lubricating parts. The oil pan is the lower half of the crankcase, also known as the lower crankcase. Its function is to seal the crankcase as the outer shell of the oil storage tank to prevent impurities from entering, and to collect and store the lubricating oil flowing back from the friction surfaces of the diesel engine, dissipate some heat, and prevent the lubricating oil from oxidizing.

[0049] In the prior art, the engine oil cooling system includes an engine controller 60 (Electronic Control Unit, ECU), an oil pump 10 and a main oil cooler 20; the oil mainly plays a lubricating role. When the engine is running, the oil pump 10 provides pressure to cool the oil in the oil pan through the main oil cooler 20 and then transport it to the main oil channel of the engine, and then the oil is supplied to various places that need lubrication through the main oil channel. When the oil enters the lubricating parts, it will take away the heat of these parts, causing the oil temperature to rise. The oil after passing through the lubricating parts returns to the oil pan again, and participates in the circulation again after being cooled. Although the above oil circuit can cool the oil to a certain extent, the cooling power is limited.

[0050] like Figure 1 As shown, Figure 1 The dashed line indicates the electrical connection relationship, and the solid line indicates the oil flow path. In this embodiment, on the basis of the existing oil path "oil pan-oil pump 10-first throttle valve 40-main oil cooler 20-engine main oil channel-various lubricating surfaces-oil pan", another oil path is added, specifically: oil pan-oil pump 10-second throttle valve 50-auxiliary oil cooler 30-engine main oil channel-various lubricating surfaces-oil pan. Specifically, the engine oil cooling system controls the opening and closing of the first throttle valve 40 and the second throttle valve 50 through the engine controller 60, so that the main oil cooler 20 and / or the auxiliary oil cooler 30 cool the oil, thereby quickly reducing the temperature of the oil entering the main oil channel, and ensuring the reliability and durability of the engine.

[0051] In a possible implementation, the auxiliary oil cooler 30 is an air-cooled oil cooler.

[0052] Specifically, the core of the air-cooled oil cooler is composed of a plurality of cooling tubes and cooling plates. When the car is running, the hot oil cooler core is cooled by the oncoming wind of the car.

[0053] In a possible implementation, the air-cooled oil cooler is installed at the front end of the vehicle.

[0054] Specifically, in order to better utilize the oncoming wind of the vehicle, the air-cooled oil cooler can be installed at the front end of the vehicle, thereby maximizing the effect of the air-cooled oil cooler.

[0055] In a possible implementation, the main engine oil cooler 20 is a water-cooled engine oil cooler.

[0056] Specifically, a water-cooled oil cooler uses the temperature of cooling water to control the temperature of lubricating oil.

[0057] In a possible implementation, the engine oil cooling system further includes: an engine cooling fan;

[0058] The engine controller 60 is also used to control the operation of the engine cooling fan.

[0059] Specifically, the engine cooling fan is used to increase the air velocity and flow rate flowing through the radiator to improve the heat dissipation effect of the radiator.

[0060] In a possible implementation, the engine cooling system further includes a thermostat, a radiator, and a water pump.

[0061] Specifically, the cylinder of the engine includes multiple water channels for coolant circulation, and the multiple water channels are connected to the radiator through water pipes. The water pump is installed at the upper water outlet of the engine, and is driven by a fan belt to pump out the hot water in the water channel of the engine cylinder and pump in the cold water. The thermostat is installed next to the water pump to control the flow path of the coolant.

[0062] In one possible implementation, reference Figure 2 , the system further comprises:

[0063] The filter 90 is installed at the inlet of the oil pump 10 to filter impurities in the oil entering the oil pump 10 .

[0064] Specifically, the filter 90 is mostly of a filter screen type, which can filter out large-sized impurities in the lubricating oil, has a small flow resistance, and is installed in series before the oil inlet of the oil pump 10 .

[0065] In one possible implementation, reference Figure 2 , the system further comprises:

[0066] The oil filter 130 has an input port connected to the output port of the oil pump 10 , and an output port connected to the first throttle valve 40 and the second throttle valve 50 , respectively, for filtering impurities in the oil.

[0067] In this embodiment, the oil filter 130 is used to filter out impurities, wear debris, sludge, water and other sundries in the oil, so that the oil delivered to each lubrication part is clean.

[0068] In a possible implementation, the engine oil cooling system further includes a first temperature sensor 70 , and the first temperature sensor 70 is used to collect the temperature of the oil in the oil pan.

[0069] Specifically, the first temperature sensor 70 includes a thermistor, a thermocouple, or a non-contact temperature measuring instrument such as a radiation temperature measuring instrument.

[0070] In a possible implementation, the engine oil cooling system also includes a second temperature sensor 80, which is used to collect the oil temperature in the main oil channel. The second temperature sensor 80 may include a thermistor, a thermocouple, a radiation temperature measuring instrument, etc.

[0071] Specifically, the first temperature sensor 70 is used to monitor the oil temperature in the oil pan and send the oil temperature of the oil pan to the engine ECU. The second temperature sensor 80 is used to monitor the oil temperature in the main oil channel and send the oil temperature of the main oil channel to the engine ECU. The engine ECU controls the opening of the first throttle valve or the second throttle valve based on the oil temperature of the oil pan or the oil temperature of the main oil channel.

[0072] In a possible implementation, the engine oil cooling system further includes an engine speed sensor 140 and a throttle opening sensor 150 . The engine speed sensor 140 is used to collect the engine speed, and the throttle opening sensor 150 is used to collect the throttle opening.

[0073] The engine oil cooling system provided in the embodiment of the present application enables the engine to select the main oil cooler 20 and / or the auxiliary oil cooler 30 to cool the oil based on actual conditions, thereby quickly reducing the temperature of the oil entering the main oil channel, preventing excessive oil temperature from causing wear of components and causing malfunctions, etc., thereby ensuring the reliability and durability of the engine.

[0074] The present application provides an engine, which includes an engine oil cooling system as described in any possible implementation manner above.

[0075] The present application provides a vehicle, comprising the engine as described above.

[0076] Figure 3 The following is a schematic diagram of the implementation process of the engine oil cooling method provided in the embodiment of the present application. The method is applied to the engine oil cooling system as described above, and the process is described in detail as follows:

[0077] S101: obtaining the current vehicle speed;

[0078] S102: Controlling the opening and closing of the first throttle valve 40 and the second throttle valve 50 according to the current vehicle speed, so that the main oil cooler and / or the auxiliary oil cooler cools the oil.

[0079] The executor of this embodiment may be the engine controller 60, wherein the method for obtaining the vehicle speed may include: obtaining the engine speed through an engine speed sensor, and obtaining the throttle opening through a throttle opening sensor; determining the fuel injection amount according to the engine speed and the throttle opening, and determining the current vehicle speed according to the fuel injection amount.

[0080] In addition, this embodiment can also obtain the current speed of the car through a speed sensor.

[0081] In a possible implementation manner, the specific implementation process of S102 includes:

[0082] S201: If the current vehicle speed is less than or equal to the first preset speed, the second throttle valve 50 is controlled to be closed, and the first throttle valve 40 is controlled to be opened, so that the main oil cooler cools the engine oil.

[0083] In this embodiment, the auxiliary oil cooler is an air-cooled oil cooler, and the main oil cooler is a water-cooled oil cooler. When the current vehicle speed is less than or equal to the first preset speed, it means that the vehicle is in an idle condition or a low-speed and low-load condition. In the idle condition, the vehicle is not moving, and the headwind cannot be used to cool the oil, and the main oil cooler can only be used for cooling. The ECU controls the second throttle valve 50 to close, and the oil is closed to enter the auxiliary oil cooler channel. The ECU controls the first throttle valve to open, and the oil enters the main oil cooler. The main oil cooler is used to cool the oil to ensure the normal operation of the engine. In the low-speed and low-load condition, the vehicle speed is low, the heat generated by the engine is small, and the headwind is also small. The ECU controls the second throttle valve 50 to close, and the oil is closed to enter the auxiliary oil cooler channel. The ECU controls the first throttle valve to open, and the oil enters the main oil cooler. The main oil cooler is used to cool the oil to ensure the normal operation of the engine.

[0084] In this embodiment, in order to ensure that the main oil cooler can effectively cool the engine oil when working alone, if the current vehicle speed is less than or equal to the first preset speed, the second throttle valve 50 is controlled to be closed, and the first throttle valve is controlled to be opened to a first opening degree. The first opening degree can be a larger opening degree value, and its value range can be 90% to 100%.

[0085] S202: If the current vehicle speed is greater than the first preset speed and less than or equal to the second preset speed, control the first throttle valve and the second throttle valve to open so that the main oil cooler and the auxiliary oil cooler cool the oil together.

[0086] In this embodiment, if the current vehicle speed is greater than the first preset speed and less than or equal to the second preset speed, the vehicle is in a medium-speed and medium-load condition, the heat generated by the engine is greater than that in a low-speed and low-load condition, and the headwind is also relatively medium. In order to reduce the oil temperature and ensure normal operation of the engine, the first throttle valve and the second throttle valve are both opened, and the main oil cooler and the auxiliary oil cooler work together to cool the oil.

[0087] S203: If the current vehicle speed is greater than the second preset speed, controlling the first throttle valve to close and controlling the second throttle valve to open, so that the auxiliary oil cooler cools the oil;

[0088] The first preset speed is lower than the second preset speed.

[0089] In this embodiment, if the current vehicle speed is greater than the second preset speed, the heat generated by the engine is relatively large, and the oncoming wind volume is also relatively large, the ECU controls the first throttle valve to close, closing the oil from entering the main oil cooler channel, and the ECU controls the second throttle valve to open, and the oil enters the auxiliary oil cooler. The auxiliary oil cooler is used to cool the oil, reducing the amount of heat taken away by the engine cooling water, thereby reducing the engine cooling water temperature, preventing the engine cooling water temperature from being too high, and ensuring reliable operation of the engine.

[0090] Exemplarily, the first preset speed may be 40 km / h, and the second preset speed may be 90 km / h.

[0091] In a possible implementation, after S202, the method provided in this embodiment further includes:

[0092] The openings of the first throttle valve and the second throttle valve are adjusted according to the current vehicle speed, and the opening of the first throttle valve is negatively correlated with the current vehicle speed, and the opening of the second throttle valve is positively correlated with the current vehicle speed.

[0093] In this embodiment, if the current vehicle speed is greater than the first preset speed and less than or equal to the second preset speed, the first throttle valve is controlled to open to the first opening, and the second throttle valve is controlled to open to the second opening. Among them, the second opening is less than the first opening, and the second opening is a smaller value, and its value range can be 10% to 20%. After the first throttle valve and the second throttle valve are both opened, the ECU adjusts the opening of the second throttle valve according to the current vehicle speed. The opening of the second throttle valve is positively correlated with the vehicle speed, that is, the faster the vehicle speed, the larger the opening of the second throttle valve. At the same time, since the heat generated by the engine is moderate at this time, the oil cooling demand is not too high, and the ECU can reduce the opening of the first throttle valve as the current vehicle speed increases, so as to ensure the oil cooling effect and use less engine cooling water to take away the oil heat, and use more headwind to take away the oil heat, reduce the engine cooling water temperature, prevent the engine cooling water temperature from being too high, and ensure the reliable operation of the engine.

[0094] In a possible implementation manner, the specific implementation process of S203 includes:

[0095] If the current vehicle speed is greater than the second preset speed and the oil temperature of the main oil gallery is less than a first preset temperature threshold, the first throttle valve is controlled to be closed and the second throttle valve is controlled to be opened so that the auxiliary oil cooler cools the oil;

[0096] Accordingly, the method provided in this embodiment also includes:

[0097] If the current vehicle speed is greater than the second preset speed and the oil temperature of the main oil channel is greater than or equal to the first preset temperature threshold, the first throttle valve and the second throttle valve are controlled to open so that the main oil cooler and the auxiliary oil cooler cool the oil together.

[0098] In this embodiment, if the current vehicle speed is greater than the second preset speed, the vehicle is in a high-speed and high-load condition, and the heat generated by the engine is relatively large. At this time, if the temperature of the main oil channel is less than the first preset temperature threshold, the first throttle valve is closed, and the second throttle valve is opened to the first opening, so that the auxiliary oil cooler uses the headwind to cool the oil. If the temperature of the main oil channel is greater than or equal to the first preset temperature threshold, it means that the effect of cooling the oil by the auxiliary oil cooler alone is not good. Therefore, on the basis of the second throttle valve being opened, the first throttle valve can be opened to the second opening. The second temperature sensor collects the temperature of the main oil channel according to the preset sampling period. When the first throttle valve is in the open state, each time the main oil channel temperature is detected to be greater than or equal to the first preset temperature threshold, the opening of the first throttle valve is increased by a unit opening until the opening of the first throttle valve reaches the maximum opening, thereby increasing the oil cooling flow and quickly reducing the oil temperature.

[0099] For example, the unit opening degree may be 20%.

[0100] In a possible implementation manner, another specific implementation process of S203 includes:

[0101] If the current vehicle speed is greater than the second preset speed and the oil temperature of the oil pan is less than a second preset temperature threshold, the first throttle valve is controlled to be closed and the second throttle valve is controlled to be opened so that the auxiliary oil cooler cools the oil;

[0102] Accordingly, the method further comprises:

[0103] If the current vehicle speed is greater than the second preset speed and the oil temperature of the oil pan is greater than or equal to the second preset temperature threshold, the first throttle valve and the second throttle valve are controlled to open so that the main oil cooler and the auxiliary oil cooler cool the oil together.

[0104] Specifically, the ECU may also use the oil temperature of the oil pan to control the opening of the first throttle valve when the vehicle is in a high-speed and high-load condition.

[0105] In one possible implementation, when the oil temperature in the main oil channel is greater than a first preset temperature threshold, the engine ECU can also control the thermostat to open, allowing the coolant to flow through the radiator and thermostat valve, and then through the water pump back to the engine for a large circulation.

[0106] In a possible implementation, if the oil temperature in the main oil gallery is greater than a first preset temperature threshold, the rotation speed of the engine cooling fan is increased.

[0107] The above method can, on the basis of ensuring the oil cooling effect, use less engine cooling water to remove the oil heat and use more headwind to remove the oil heat, thereby reducing the engine cooling water temperature, preventing the engine cooling water oil temperature from being too high, and ensuring reliable operation of the engine.

[0108] The following is an embodiment of the device of the present application. For details not described in detail, please refer to the corresponding method embodiment described above.

[0109] Figure 4 The structural schematic diagram of the engine oil cooling device provided by the embodiment of the present application is shown. For the convenience of description, only the part related to the embodiment of the present application is shown, which is described in detail as follows:

[0110] like Figure 4 As shown, the engine oil cooling device 100 includes:

[0111] The vehicle speed acquisition module 110 is used to acquire the current vehicle speed;

[0112] The oil cooling module 120 is used to control the opening and closing of the first throttle valve and the second throttle valve according to the current vehicle speed, so that the main oil cooler and / or the auxiliary oil cooler cools the oil.

[0113] In a possible implementation, the oil cooling module 120 includes:

[0114] a first engine oil cooling unit, configured to control the second throttle valve to close and the first throttle valve to open if the current vehicle speed is less than or equal to a first preset speed, so that the main engine oil cooler cools the engine oil;

[0115] a second oil cooling unit, configured to control both the first throttle valve and the second throttle valve to open if the current vehicle speed is greater than the first preset speed and less than or equal to a second preset speed, so that the main oil cooler and the auxiliary oil cooler cool the oil together;

[0116] a third oil cooling unit, configured to control the first throttle valve to close and the second throttle valve to open if the current vehicle speed is greater than the second preset speed, so that the auxiliary oil cooler cools the oil;

[0117] The first preset speed is lower than the second preset speed.

[0118] In a possible implementation, the second oil cooling unit further includes an opening adjustment subunit, which is used to:

[0119] The openings of the first throttle valve and the second throttle valve are adjusted according to the current vehicle speed, and the opening of the first throttle valve is negatively correlated with the current vehicle speed, and the opening of the second throttle valve is positively correlated with the current vehicle speed.

[0120] In a possible implementation, the third oil cooling unit includes:

[0121] If the current vehicle speed is greater than the second preset speed and the oil temperature of the main oil gallery is less than a first preset temperature threshold, the first throttle valve is controlled to be closed and the second throttle valve is controlled to be opened so that the auxiliary oil cooler cools the oil;

[0122] Accordingly, the engine oil cooling device 100 further includes a fourth oil cooling unit, which is used for:

[0123] If the current vehicle speed is greater than the second preset speed and the oil temperature of the main oil channel is greater than or equal to the first preset temperature threshold, the first throttle valve and the second throttle valve are controlled to open so that the main oil cooler and the auxiliary oil cooler cool the oil together.

[0124] In a possible implementation, the third oil cooling unit includes:

[0125] If the current vehicle speed is greater than the second preset speed and the oil temperature of the oil pan is less than a second preset temperature threshold, the first throttle valve is controlled to be closed and the second throttle valve is controlled to be opened so that the auxiliary oil cooler cools the oil;

[0126] Accordingly, the engine oil cooling device 100 further includes a fifth oil cooling unit, which is used for:

[0127] If the current vehicle speed is greater than the second preset speed and the oil temperature of the oil pan is greater than or equal to the second preset temperature threshold, the first throttle valve and the second throttle valve are controlled to open so that the main oil cooler and the auxiliary oil cooler cool the oil together.

[0128] The present application also provides a computer program product having a program code, which executes the steps of any of the above engine oil cooling method embodiments when the program code is run in a corresponding processor, controller, computing device or terminal, such as Figure 3 Steps S101 to S102 shown. It will be appreciated by those skilled in the art that the method and the device proposed in the embodiment of the present application can be implemented in various forms of hardware, software, firmware, a dedicated processor or a combination thereof. The dedicated processor may include an application specific integrated circuit (ASIC), a reduced instruction set computer (RISC) and / or a field programmable gate array (FPGA). The proposed method and device are preferably implemented as a combination of hardware and software. The software is preferably installed on a program storage device as an application. It is typically based on a machine with a computer platform having hardware, such as one or more central processing units (CPUs), random access memories (RAMs) and one or more input / output (I / O) interfaces. An operating system is also typically installed on the computer platform. The various processes and functions described herein may be part of an application, or a part thereof may be executed by an operating system.

[0129] Figure 5 Schematic diagram of an engine controller provided in an embodiment of the present application. Figure 5 As shown, the engine controller 5 of this embodiment includes: a processor 50, a memory 51, and a computer program 52 stored in the memory 51 and executable on the processor 50. When the processor 50 executes the computer program 52, the steps in the above-mentioned engine oil cooling method embodiments are implemented, for example Figure 3 Alternatively, when the processor 50 executes the computer program 52, the functions of each module / unit in the above-mentioned device embodiments are realized, for example Figure 4 The functions of the modules 110 to 120 are shown.

[0130] Exemplarily, the computer program 52 may be divided into one or more modules / units, which are stored in the memory 51 and executed by the processor 50 to complete / implement the solution provided by the present application. The one or more modules / units may be a series of computer program instruction segments capable of completing specific functions, which are used to describe the execution process of the computer program 52 in the engine controller 5. For example, the computer program 52 may be divided into Figure 4 Modules 110 to 120 are shown.

[0131] The engine controller 5 may include, but is not limited to, a processor 50 and a memory 51. Those skilled in the art will appreciate that Figure 5It is only an example of the engine controller 5 and does not constitute a limitation of the engine controller 5. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the engine controller may also include input and output devices, network access devices, buses, etc.

[0132] The processor 50 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0133] The memory 51 may be an internal storage unit of the engine controller 5, such as a hard disk or memory of the engine controller 5. The memory 51 may also be an external storage device of the engine controller 5, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the engine controller 5. Further, the memory 51 may also include both an internal storage unit of the engine controller 5 and an external storage device. The memory 51 is used to store the computer program and other programs and data required by the engine controller. The memory 51 may also be used to temporarily store data that has been output or is to be output.

[0134] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0135] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0136] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0137] In the embodiments provided in the present application, it should be understood that the disclosed device / engine controller and method can be implemented in other ways. For example, the device / engine controller embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0138] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0139] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0140] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above-mentioned engine oil cooling method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device that can carry the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practices in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practices, computer-readable media does not include electrical carrier signals and telecommunication signals.

[0141] In addition, the embodiments shown in the drawings of the present application or the features of the various embodiments mentioned in this specification are not necessarily understood as independent embodiments. Instead, each feature described in one example of an embodiment can be combined with one or more other desired features from other embodiments to produce other embodiments not described in words or with reference to the drawings.

[0142] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. An engine oil cooling system, characterized in that: include: An oil pump, installed in the oil pan of the engine, for pressurizing and pumping out the oil in the oil pan; a main oil cooler, connected to the oil pump, for cooling the inflowing oil and delivering the cooled oil to the main oil channel of the engine; an auxiliary oil cooler, connected to the oil pump, for cooling the incoming oil and delivering the cooled oil to the main oil gallery of the engine; A first throttle valve, installed on the connecting pipeline between the oil pump and the main engine oil cooler, for controlling the oil flow rate flowing into the main engine oil cooler; a second throttle valve, installed on the connecting pipeline between the oil pump and the auxiliary oil cooler, and used for controlling the oil flow rate flowing into the auxiliary oil cooler; The engine oil cooling system also includes an engine controller; The engine controller is used to obtain the current vehicle speed; if the current vehicle speed is less than or equal to the first preset speed, the second throttle valve is controlled to be closed, and the first throttle valve is controlled to be opened, so that the main oil cooler cools the engine oil; If the current vehicle speed is greater than the first preset speed and less than or equal to the second preset speed, the first throttle valve and the second throttle valve are controlled to open, so that the main oil cooler and the auxiliary oil cooler cool the oil together; If the current vehicle speed is greater than the second preset speed, the first throttle valve is controlled to be closed, and the second throttle valve is controlled to be opened, so that the auxiliary oil cooler cools the oil; The first preset speed is less than the second preset speed; The auxiliary oil cooler is an air-cooled oil cooler; The air-cooled oil cooler is installed at the front end of the vehicle.

2. The engine oil cooling system according to claim 1, characterized in that: The main engine oil cooler is a water-cooled engine oil cooler.

3. An engine oil cooling method, characterized in that: Applied to the engine oil cooling system according to any one of claims 1 to 2, the method comprises: Get the current vehicle speed; Controlling the opening and closing of the first throttle valve and the second throttle valve according to the current vehicle speed, so that the main oil cooler and / or the auxiliary oil cooler cool the engine oil; The controlling the opening and closing of the first throttle valve and the second throttle valve according to the current vehicle speed so that the main oil cooler and / or the auxiliary oil cooler cools the oil includes: If the current vehicle speed is less than or equal to a first preset speed, the second throttle valve is controlled to be closed, and the first throttle valve is controlled to be opened, so that the main oil cooler cools the engine oil; If the current vehicle speed is greater than the first preset speed and less than or equal to the second preset speed, the first throttle valve and the second throttle valve are controlled to open, so that the main oil cooler and the auxiliary oil cooler cool the oil together; If the current vehicle speed is greater than the second preset speed, the first throttle valve is controlled to be closed, and the second throttle valve is controlled to be opened, so that the auxiliary oil cooler cools the oil; The first preset speed is lower than the second preset speed.

4. The engine oil cooling method according to claim 3, characterized in that: After controlling both the first throttle valve and the second throttle valve to open if the current vehicle speed is greater than the first preset speed and less than or equal to the second preset speed, the method further includes: The openings of the first throttle valve and the second throttle valve are adjusted according to the current vehicle speed, and the opening of the first throttle valve is negatively correlated with the current vehicle speed, and the opening of the second throttle valve is positively correlated with the current vehicle speed.

5. The engine oil cooling method according to claim 3, characterized in that: If the current vehicle speed is greater than the second preset speed, the first throttle valve is controlled to be closed, and the second throttle valve is controlled to be opened, so that the auxiliary oil cooler cools the oil, comprising: If the current vehicle speed is greater than the second preset speed and the oil temperature of the main oil gallery is less than a first preset temperature threshold, the first throttle valve is controlled to be closed and the second throttle valve is controlled to be opened so that the auxiliary oil cooler cools the oil; Accordingly, the method further comprises: If the current vehicle speed is greater than the second preset speed and the oil temperature of the main oil channel is greater than or equal to the first preset temperature threshold, the first throttle valve and the second throttle valve are controlled to open so that the main oil cooler and the auxiliary oil cooler cool the oil together.

6. The engine oil cooling method according to claim 3, characterized in that: If the current vehicle speed is greater than the second preset speed, the first throttle valve is controlled to be closed, and the second throttle valve is controlled to be opened, so that the auxiliary oil cooler cools the oil, comprising: If the current vehicle speed is greater than the second preset speed and the oil temperature of the oil pan is less than a second preset temperature threshold, the first throttle valve is controlled to be closed and the second throttle valve is controlled to be opened so that the auxiliary oil cooler cools the oil; Accordingly, the method further comprises: If the current vehicle speed is greater than the second preset speed and the oil temperature of the oil pan is greater than or equal to the second preset temperature threshold, the first throttle valve and the second throttle valve are controlled to open so that the main oil cooler and the auxiliary oil cooler cool the oil together.

7. An engine, characterized in that: The invention comprises an engine oil cooling system as claimed in any one of claims 1 to 2.

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