Integrated diesel engine lubricating system engine oil filtering and temperature control device and working method thereof

Abstract

The invention belongs to the technical field of internal combustion engine lubrication, and discloses an integrated diesel engine lubrication system engine oil filtering and temperature control device and a working method thereof, and the method comprises a temperature adjusting unit, a temperature selecting unit, a four-way valve and a filtering unit which are sequentially arranged and connected from top to bottom; a partition plate is arranged in the temperature adjusting unit and divides the temperature adjusting unit into a heating part, a normal temperature part and a cooling part, the temperature selecting unit comprises a high-temperature opening valve and a low-temperature opening valve, and four openings of the four-way valve are connected with the filtering unit, the high-temperature opening valve, the low-temperature opening valve and the temperature adjusting unit through pipelines respectively; the heating part is connected with the low-temperature opening valve, the cooling part is connected with the high-temperature opening valve, and the normal-temperature part is connected with the four-way valve; a pressure valve is arranged at the joint of the four-way valve and the normal-temperature part. The engine oil cooling, heating and filtering functions are integrated, the needed space is reduced, the installation process is simplified, and the complexity of the system is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of internal combustion engine lubrication, and in particular to an integrated diesel engine lubrication system oil filtering and temperature control device and a working method thereof. Background Art

[0002] Diesel engines play a vital role in many fields such as transportation, construction, agriculture and power generation due to their high efficiency, high torque and long life. However, diesel engines generate a lot of heat during operation, which causes the oil temperature to rise, which in turn affects its lubrication performance and increases the wear of engine components. To solve this problem, traditional diesel engines are usually equipped with independent oil coolers to reduce the oil temperature. At the same time, in order to maintain the cleanliness of the oil, it is also necessary to install an oil filter to remove impurities and particulate matter in the oil. In low temperature environments, especially during cold starts, excessive oil viscosity can also lead to poor lubrication, increase internal friction in the engine, and thus increase fuel consumption and emissions. Therefore, in some cases, the oil needs to be preheated to ensure that it has proper fluidity at start-up.

[0003] The existing split design installs the oil cooler, oil filter and possible heating device separately, which not only takes up a large space and increases the complexity and maintenance cost of the system, but also increases the flow resistance due to the long connecting pipes, thereby reducing the overall efficiency.

[0004] Chinese invention patent: Announcement number is "CN105298586B", titled "An engine oil filter and oil cooler integrated module", which discloses an engine oil filter and oil cooler integrated module, including a module body and an oil filter, an oil cooler and a water pump integrated on the module body, and the module body is provided with correspondingly connected oil channels and water channels. This technical solution simplifies the engine water and oil circuits, reduces the number of engine parts, has a compact structure, not only saves space, but also facilitates assembly and improves product quality, and has better stability. However, this technical solution can only provide a single cooling function, and cannot effectively preheat the engine oil in a low temperature environment. Summary of the invention

[0005] In order to solve the problem that the separate cooler, oil filter and heating device in the prior art occupy a large space, and the oil filter with a single function cannot effectively preheat the oil in a low temperature environment, the present invention proposes an integrated diesel engine lubrication system oil filtration and temperature control device and a working method thereof, aiming to provide a diesel engine lubrication system device that occupies a small space and can realize the three functions of oil filtration, heating and cooling.

[0006] The present invention is realized through the following technical scheme: it includes a temperature regulating unit, a temperature selecting unit, a four-way valve and a filtering unit which are arranged and connected in sequence from top to bottom; a partition plate is arranged inside the temperature regulating unit, and the partition plate divides the temperature regulating unit into three parts: heating, normal temperature and cooling; the temperature selecting unit includes a high-temperature opening valve and a low-temperature opening valve; the four openings of the four-way valve are respectively connected to the filtering unit, the high-temperature opening valve, the low-temperature opening valve and the temperature regulating unit through pipelines; the heating part is connected to the low-temperature opening valve, the cooling part is connected to the high-temperature opening valve, and the normal temperature part is connected to the four-way valve; a pressure valve is arranged at the connection between the four-way valve and the normal temperature part; the temperature regulating unit also includes an oil outlet, the filtering unit also includes a third inlet and a third outlet, the third outlet is connected to the four-way valve, the heating part has a second outlet and a second inlet which are connected through a copper tube, and the cooling part has a first outlet and a first inlet which are connected through a copper tube.

[0007] As a further preference, the high-temperature opening valve includes a valve arranged in a pipeline connected to the four-way valve and the temperature regulating unit, a temperature-sensitive material arranged inside the high-temperature opening valve away from one end of the valve, and a push rod arranged between the valve and the temperature-sensitive material. The temperature-sensitive material in the high-temperature opening valve will decrease in volume as the temperature increases; the structure of the low-temperature opening valve is the same as that of the high-temperature opening valve, except that the temperature-sensitive material in the low-temperature opening valve will increase in volume as the temperature increases.

[0008] As a further preference, the filter unit includes a top plate and an outer shell, the outer shell as a whole is a cylinder with an opening on one side, the open side is fixedly connected to the top plate, the third outlet is opened in the center of the top plate, and the third inlet is arranged on the circumferential side wall of the outer shell; the filter unit also includes a retaining frame arranged inside the outer shell and a filter element embedded in the retaining frame.

[0009] As a further preference, the filter unit further comprises a bypass valve, a groove is provided on the side of the shell away from the top plate, the bypass valve is embedded in the groove inside the shell, one side of the retaining frame cooperates with the top plate, and the other side cooperates with the bypass valve.

[0010] As a further preference, the temperature-sensitive material in the high-temperature opening valve is heat-shrinkable silicone rubber, and the temperature-sensitive material in the low-temperature opening valve is a thermal memory alloy.

[0011] As a further preference, the first inlet is arranged close to the high temperature opening valve, and the first outlet is arranged far away from the high temperature opening valve; the second inlet is arranged close to the low temperature opening valve, and the second outlet is arranged far away from the low temperature opening valve.

[0012] As a further preference, the partition plate is parallel to the axial direction of the temperature regulating unit; and the copper tubes are arranged alternately in the heating part and the cooling part respectively.

[0013] As a further preference, the normal temperature part of the temperature regulating unit is provided with a normal temperature water pipeline, one end of the normal temperature water pipeline is connected to the four-way valve through a pipeline, and the other end is connected to the oil outlet.

[0014] As a further preference, the partition plate is made of a heat-insulating material, and one-way valves are provided at the third outlet, the third inlet, both ends of the normal temperature water pipeline and the oil outlet.

[0015] The present invention also provides a working method for the integrated diesel engine lubrication system oil filtration and temperature control device of the present invention, which is characterized by comprising the following steps:

[0016] Step 1: The engine oil enters the filter unit through the third inlet, and is filtered by the filter element to remove impurities and particulate matter;

[0017] Step 2: The filtered oil flows through the four-way valve to the temperature selection unit. The temperature selection unit is adjusted according to the temperature of the oil. The adjustment method is as follows:

[0018] When the oil temperature exceeds 80°C, the high temperature opening valve opens, the oil enters the cooling part of the temperature regulating unit, and step three is executed;

[0019] When the oil temperature is lower than 10°C, the low temperature opening valve opens, the oil enters the heating part in the temperature regulating unit, and step 4 is executed;

[0020] When the oil temperature is 10℃≤≤80℃, the pressure in the four-way valve increases continuously and exceeds the pressure set by the pressure valve, the pressure valve opens, and the oil enters the normal temperature part of the temperature regulating unit, and step five is executed;

[0021] Step 3: The coolant enters the cooling part of the temperature regulating unit through the first inlet, flows in the copper tube and exchanges heat with the surrounding engine oil, and after lowering the engine oil temperature, the coolant flows out of the temperature regulating unit through the first outlet;

[0022] Step 4: The heating liquid enters the heating part of the temperature regulating unit through the second inlet, flows in the copper tube and exchanges heat with the surrounding engine oil, and after the engine oil temperature is increased, the heating liquid flows out of the temperature regulating unit through the second outlet;

[0023] Step 5: The regulated oil returns to the engine circulation system through the oil outlet.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention integrates the functions of oil cooling, heating and filtering into one, which reduces the required space, simplifies the installation process, and reduces the complexity of the system. This integrated design helps to improve overall efficiency.

[0026] 2. The present invention can achieve heating or cooling of the engine oil through the temperature regulating unit, ensuring that the engine oil can be maintained within the optimal operating temperature range under various working conditions, thereby improving the lubrication performance of the engine and reducing wear.

[0027] 3. The present invention has higher reliability and durability in long-term operation because the whole system is more compact and the structure is more reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 It is a half-section schematic diagram of the filter unit of the present invention.

[0030] Figure 3 It is a partially enlarged schematic diagram of the high-temperature opening valve or low-temperature opening valve structure of the present invention.

[0031] Figure 4 It is a transverse half-section schematic diagram of the temperature adjustment unit of the present invention.

[0032] Figure 5 It is a vertical half-section schematic diagram of the temperature adjustment unit of the present invention.

[0033] Indicated in the figure:

[0034] 10. Temperature regulating unit; 11. Oil outlet; 12. First outlet; 13. Second outlet; 14. First inlet; 15. Second inlet; 16. One-way valve; 17. Partition plate; 18. Copper tube; 19. Normal temperature water pipeline; 20. Temperature selection unit; 21. High temperature opening valve; 22. Low temperature opening valve; 23. Four-way valve; 25. Temperature sensing material; 26. Push rod; 27. Valve; 30. Filter unit; 31. Top plate; 32. Shell; 33. Third outlet; 34. Third inlet; 35. Retaining frame; 36. Filter element; 37. Bypass valve. DETAILED DESCRIPTION

[0035] Advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments thereof, which are given by way of example only with reference to the accompanying drawings.

[0036] like Figure 1As shown, the present invention provides an integrated diesel engine lubrication system oil filtration and temperature control device, including a temperature regulating unit 10, a temperature selection unit 20 and a filter unit 30. The temperature regulating unit 10, the temperature selection unit 20 and the filter unit 30 are arranged and connected in sequence from top to bottom. The filter unit 30 is arranged below the temperature selection unit 20 and is connected through a four-way valve 23; the temperature regulating unit 10 is arranged above the temperature selection unit 20 and is connected through a pipeline. Among them, the filter unit 30 is responsible for filtering impurities in the oil and maintaining the cleanliness of the oil; the temperature selection unit 20 selects the channel for the oil to flow to the temperature regulating unit 10 according to the temperature of the filtered oil; the temperature regulating unit 10 can realize the cooling or heating function of the oil to ensure that the temperature of the oil entering the engine is maintained within the working range.

[0037] like Figure 2As shown, it is a half-section schematic diagram of the filter unit 30 of the present invention. The filter unit 30 includes a top plate 31, a shell 32, a third outlet 33 and a third inlet 34. The shell 32 is a cylindrical shape with a single-side opening as a whole, and the top plate 31 is fixedly connected to one side of the opening. A third outlet 33 is provided in the center of the top plate 31, and the third outlet 33 is connected to the four-way valve 23. The third outlet 33 is the oil outlet of the filter unit 30, and the oil after filtering by the filter unit 30 flows out from the third outlet 33 and enters the temperature selection unit 20 through the four-way valve 23. The third inlet 34 is arranged on the circumferential side wall of the shell 32, for the unfiltered oil to flow in, and the unfiltered oil flows into the filter unit through the third inlet and starts filtering. The third inlet 34 is preferably arranged in the middle of the circumferential side wall of the shell 32. The shell 32 is connected to the top plate 31 by threads, and the top plate 31 is fixed on the shell 32 to form a closed structure of the filter unit 30. The filter unit 30 further includes a retainer 35, a filter element 36 and a bypass valve 37 arranged inside the housing 32. A groove is arranged on one side of the housing 32 away from the top plate 31, and the bypass valve 37 is embedded in the groove inside the housing 32. The filter element 36 is embedded in the retainer 35, and the retainer 35 is used to fix the filter element 36. One side of the retainer 35 cooperates with the top plate 31 to ensure that the filter element 36 is fixed in the correct position; the other side of the retainer 35 cooperates with the bypass valve 37 to ensure that the oil is filtered through the filter element 36. The unfiltered oil flows into the filter unit 30 through the third inlet 34, and after being filtered by the filter element 36, the clean oil enters the inside of the retainer 35, and then flows to the temperature selection unit 20 through the third outlet 33. When the filter element 36 is blocked by impurities, the resistance of the oil flowing through the filter element 36 increases, resulting in an increase in the pressure at both ends of the filter element 36. When the pressure difference exceeds the opening pressure of the bypass valve 37 , the spring in the bypass valve 37 is compressed, the bypass valve 37 opens, and the engine oil bypasses the filter element 36 and enters the interior of the filter element 36 from the bypass valve 37 , thereby entering the temperature selection unit 20 through the third outlet 33 .

[0038] like Figure 1 and Figure 3 As shown, Figure 3Schematic diagram of the internal structure of the high temperature opening valve 21 or the low temperature opening valve 22 of the present invention. The temperature selection unit 20 includes a high temperature opening valve 21 and a low temperature opening valve 22. One opening of the four-way valve 23 is connected to the third outlet 33, and the other three openings are connected to the high temperature opening valve 21, the low temperature opening valve 22 and the temperature adjustment unit 10 respectively. The other ends of the high temperature opening valve 21 and the low temperature opening valve 22 are connected to the temperature adjustment unit 10 respectively. The internal structures of the high temperature opening valve 21 and the low temperature opening valve 22 are consistent. The high temperature opening valve 21 includes a temperature sensing material 25, a push rod 26 and a valve 27. The valve 27 is arranged in a pipeline connected to the four-way valve 23 and the temperature adjustment unit 10, and the temperature sensing material 25 is arranged in the high temperature opening valve 21 at one end away from the valve 27, and a push rod 26 is arranged between the valve 27 and the temperature sensing material 25. The temperature sensing material 25 in the high temperature opening valve 21 is a heat shrinkable silicone rubber, which will decrease in volume as the temperature increases, and the volume will change significantly when the temperature exceeds 80°C. The 80°C here is the working temperature set by the temperature control device of the present invention, which can be modified according to actual conditions. The 80°C can be adjusted by parameters such as the product formula. When the engine oil flows to the high-temperature opening valve 21 through the four-way valve 23, if the engine oil temperature does not exceed 80°C, the volume of the temperature-sensitive material 25 in the high-temperature opening valve 21 remains unchanged, and under the action of the push rod 26, the valve 27 is in a closed state; if the engine oil temperature exceeds 80°C, that is, the set working temperature, the volume of the temperature-sensitive material 25 in the high-temperature opening valve 21 decreases, thereby driving the push rod 26 to generate an upward pulling force, opening the valve 27, and the engine oil in the four-way valve 23 with a temperature exceeding 80°C enters the temperature regulating unit 10 through the high-temperature opening valve 21. When the engine oil temperature drops below 80°C, the volume of the temperature-sensitive material 25 in the high-temperature opening valve 21 increases, generating a downward thrust on the push rod 26, thereby closing the valve 27. The low temperature opening valve 22 has the same structure as the high temperature opening valve 21, except that the temperature-sensitive material 25 in the low temperature opening valve 22 is a material with significant thermal expansion and contraction characteristics, such as a thermal memory alloy. When the engine oil flows to the low temperature opening valve 22 through the four-way valve 23, if the engine oil temperature is not lower than 10°C, the volume of the temperature-sensitive material 25 in the low temperature opening valve 22 remains unchanged, and under the action of the push rod 26, the valve 27 is in a closed state; if the engine oil temperature is lower than 10°C, that is, the set working temperature, the volume of the temperature-sensitive material 25 in the low temperature opening valve 22 decreases, thereby driving the push rod 26 to generate an upward pulling force, opening the valve 27, and the engine oil in the four-way valve 23 with a temperature lower than 10°C enters the temperature regulating unit 10 through the low temperature opening valve 22. When the engine oil temperature rises to 10°C, the volume of the temperature-sensitive material 25 in the low temperature opening valve 22 increases, generating a downward thrust on the push rod 26, thereby closing the valve 27.

[0039] A pressure valve is provided at the outlet of the four-way valve 23 directly connected to the temperature regulating unit 10. When the oil pressure at the pressure valve exceeds the set pressure, the pressure valve opens, and the oil enters the temperature regulating unit 10 through the pressure valve.

[0040] like Figure 1 , Figure 4 and Figure 5 As shown, the temperature regulating unit 10 includes an oil outlet 11, a first outlet 12, a second outlet 13, a first inlet 14 and a second inlet 15. The first outlet 12 is a coolant outlet, the second outlet 13 is a heating liquid outlet, the first inlet 14 is a coolant inlet, and the second inlet 15 is a heating liquid inlet. The temperature regulating unit 10 is divided into three parts by a partition plate 17, and the partition plate 17 is parallel to the axial direction of the temperature regulating unit 10. The three parts inside the temperature regulating unit 10 are a heating part, a normal temperature part and a cooling part, respectively. The heating part is connected to the low temperature opening valve 22 through a pipeline, the cooling part is connected to the high temperature opening valve 21 through a pipeline, and the normal temperature part is directly connected to the four-way valve 23 through a pipeline. The first outlet 12 and the first inlet 14 are arranged on the side wall of the cooling part, and the first inlet 14 is arranged close to the high temperature opening valve 21, and the first outlet 12 is arranged away from the high temperature opening valve 21. The second outlet 13 and the second inlet 15 are arranged on the side wall of the heating part, and the second inlet 15 is arranged close to the low-temperature opening valve 22, and the second outlet 13 is arranged away from the low-temperature opening valve 22. The temperature regulating unit 10 also includes a copper tube 18 arranged in the heating part and the cooling part. The two ends of the copper tube 18 of the heating part are respectively connected to the second outlet 13 and the second inlet 15 for passing the heating liquid; the two ends of the copper tube 18 of the cooling part are respectively connected to the first outlet 12 and the first inlet 14 for passing the cooling liquid. The copper tubes 18 are arranged alternately in the heating part and the cooling part, respectively, so that the contact area between the heating liquid or the cooling liquid and the engine oil can be increased, and the heating or cooling effect can be better. The partition plate 17 effectively divides the temperature regulating unit 10 into three functional areas to prevent heat exchange interference between different temperature areas. The temperature regulating unit 10 is provided with an oil outlet 11 at one end away from the four-way valve 23. The normal temperature part of the temperature regulating unit 10 is provided with a normal temperature water pipeline 19, one end of which is connected to the four-way valve 23 through a pipeline, and the other end is connected to the engine oil outlet 11. The normal temperature water pipeline 19 can avoid the influence of the heating part and the cooling part of the temperature regulating unit 10 on the temperature of the normal temperature part, and the partition plate 17 can also be made of heat insulating material. Check valves 16 are provided at the third outlet 33, the third inlet 34, both ends of the normal temperature water pipeline 19 and the engine oil outlet 11 to ensure that the engine oil can only flow in one direction.

[0041] When the engine oil needs to be heated, that is, the engine oil temperature is lower than the set temperature (10°C), the heating liquid enters the heating part of the temperature regulating unit 10 through the second inlet 15 and flows in the copper tube 18. The copper tube 18 exchanges heat with the surrounding engine oil and transfers heat to the engine oil, thereby increasing the temperature of the engine oil. The heating liquid after heat release is discharged through the second outlet 13. When the engine oil needs to be cooled, that is, the engine oil temperature exceeds the set temperature (80°C), the cooling liquid enters the cooling part of the temperature regulating unit 10 through the first inlet 14 and flows in the copper tube 18. The copper tube 18 exchanges heat with the surrounding engine oil and absorbs the heat of the engine oil, thereby reducing the temperature of the engine oil. The cooling liquid after heat absorption is discharged through the first outlet 12. When the engine oil does not need to be heated or cooled, that is, the engine oil is between the set temperatures (10°C ≤ engine oil temperature ≤ 80°C), the high-temperature opening valve 21 and the low-temperature opening valve 22 are both in the closed state, and the pressure at the four-way valve 23 continues to increase. When the pressure reaches the pressure set by the pressure valve, the pressure valve opens, and the engine oil can flow out directly through the normal temperature water pipeline 19 without going through the heating or cooling process.

[0042] The present invention also provides a working method for the integrated diesel engine lubrication system oil filtration and temperature control device of the present invention, comprising the following steps:

[0043] Step 1: The engine oil enters the filter unit 30 through the third inlet 34 and is filtered by the filter element 36 to remove impurities and particulate matter. If the filter element 36 is blocked and the flow resistance is too large, the bypass valve 37 is opened to allow the engine oil to bypass the filter element 36 and flow directly to the third outlet 33.

[0044] Step 2: The filtered oil flows through the four-way valve 23 to the temperature selection unit 20. The temperature selection unit 20 adjusts the temperature according to the oil temperature. The adjustment method is as follows:

[0045] When the engine oil temperature exceeds 80°C (the temperature at which the volume of the temperature-sensitive material 25 in the high-temperature opening valve 21 is significantly reduced), the high-temperature opening valve 21 opens, and the engine oil enters the cooling part in the temperature regulating unit 10, and step three is executed;

[0046] When the engine oil temperature is lower than 10°C (the temperature at which the volume of the temperature-sensitive material 25 in the low-temperature opening valve 22 is significantly reduced), the low-temperature opening valve 22 opens, and the engine oil enters the heating part in the temperature adjustment unit 10, and step 4 is executed;

[0047] When 10℃≤oil temperature≤80℃, that is, the oil temperature is within the temperature range where the volume of the temperature-sensitive material 25 in the high-temperature opening valve 21 and the low-temperature opening valve 22 changes significantly, the pressure in the four-way valve 23 increases continuously. When it exceeds the pressure set by the pressure valve, the pressure valve opens, and the oil enters the normal temperature part in the temperature regulating unit 10, and step five is executed.

[0048] Step 3: The coolant enters the cooling part of the temperature regulating unit 10 through the first inlet 14 , flows in the copper tube 18 and exchanges heat with the surrounding engine oil. After lowering the engine oil temperature, the coolant flows out of the temperature regulating unit 10 through the first outlet 12 .

[0049] Step 4: The heating liquid enters the heating part of the temperature regulating unit 10 through the second inlet 15 , flows in the copper tube 18 and exchanges heat with the surrounding engine oil. After increasing the temperature of the engine oil, the heating liquid flows out of the temperature regulating unit 10 through the second outlet 13 .

[0050] Step 5: The regulated engine oil returns to the engine circulation system through the engine oil outlet 11. Ensure that the engine operates within the optimal operating temperature range.

[0051] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope required by the present invention.

Claims

1. An integrated diesel engine lubrication system oil filtration and temperature control device, characterized in that: The invention comprises a temperature regulating unit (10), a temperature selecting unit (20), a four-way valve (23) and a filtering unit (30) which are arranged and connected in sequence from top to bottom; a partition plate (17) is arranged inside the temperature regulating unit (10), and the partition plate (17) divides the temperature regulating unit (10) into three parts: heating, normal temperature and cooling; the temperature selecting unit (20) comprises a high-temperature opening valve (21) and a low-temperature opening valve (22); four openings of the four-way valve (23) are respectively connected to the filtering unit (30), the high-temperature opening valve (21), the low-temperature opening valve (22) and the temperature regulating unit (10) through pipelines; the heating part is connected to the low-temperature opening valve (21); the low-temperature opening valve (22) is connected to the high-temperature opening valve (21); the low-temperature opening valve (22) is connected to the high-temperature opening valve (21); the high-temperature opening valve (22) is connected to the low-temperature opening valve (22); the high-temperature opening valve (21 ... The heating part (10) is connected to the high temperature opening valve (22), the cooling part is connected to the high temperature opening valve (21), and the normal temperature part is connected to the four-way valve (23); a pressure valve is provided at the connection between the four-way valve (23) and the normal temperature part; the temperature regulating unit (10) further comprises an oil outlet (11), the filtering unit (30) further comprises a third inlet (34) and a third outlet (33), the third outlet (33) is connected to the four-way valve (23), the heating part is provided with a second outlet (13) and a second inlet (15) and connected via a copper tube (18), and the cooling part is provided with a first outlet (12) and a first inlet (14) and connected via a copper tube (18).

2. The integrated diesel engine lubrication system oil filtration and temperature control device according to claim 1, characterized in that: The high-temperature opening valve (21) comprises a valve (27) arranged in a pipeline connected to a four-way valve (23) and a temperature adjustment unit (10), a temperature-sensitive material (25) arranged inside the high-temperature opening valve (21) at one end away from the valve (27), and a push rod (26) arranged between the valve (27) and the temperature-sensitive material (25). The temperature-sensitive material (25) in the high-temperature opening valve (21) will decrease in volume as the temperature increases. The low-temperature opening valve (22) has the same structure as the high-temperature opening valve (21), except that the temperature-sensitive material (25) in the low-temperature opening valve (22) will increase in volume as the temperature increases.

3. The integrated diesel engine lubrication system oil filter and temperature control device according to claim 2 is characterized in that: The filter unit (30) comprises a top plate (31) and a shell (32); the shell (32) is in the shape of a cylinder with a single-side opening, the open side being fixedly connected to the top plate (31); a third outlet (33) is provided at the center of the top plate (31), and a third inlet (34) is provided on the circumferential side wall of the shell (32); the filter unit (30) further comprises a retaining frame (35) provided inside the shell (32) and a filter element (36) embedded in the retaining frame (35).

4. The integrated diesel engine lubrication system oil filter and temperature control device according to claim 3 is characterized in that: The filter unit (30) further comprises a bypass valve (37); a groove is provided on a side of the housing (32) away from the top plate (31); the bypass valve (37) is embedded in the groove of the housing (32); one side of the retaining frame (35) cooperates with the top plate (31) and the other side cooperates with the bypass valve (37).

5. The integrated diesel engine lubrication system oil filter and temperature control device according to claim 3 is characterized in that: The temperature-sensitive material (25) in the high-temperature opening valve (21) is heat-shrinkable silicone rubber, and the temperature-sensitive material (25) in the low-temperature opening valve (22) is a heat-memory alloy.

6. The integrated diesel engine lubrication system oil filter and temperature control device according to claim 3, characterized in that: The first inlet (14) is arranged close to the high temperature opening valve (21), and the first outlet (12) is arranged away from the high temperature opening valve (21); the second inlet (15) is arranged close to the low temperature opening valve (22), and the second outlet (13) is arranged away from the low temperature opening valve (22).

7. The integrated diesel engine lubrication system oil filter and temperature control device according to claim 3, characterized in that: The partition plate (17) is parallel to the axial direction of the temperature adjustment unit (10); and the copper tubes (18) are arranged alternately in the heating part and the cooling part.

8. The integrated diesel engine lubrication system oil filter and temperature control device according to claim 3 is characterized in that: The normal temperature part of the temperature regulating unit (10) is provided with a normal temperature water pipeline (19), one end of the normal temperature water pipeline (19) is connected to a four-way valve (23) through a pipeline, and the other end is connected to an engine oil outlet (11).

9. The integrated diesel engine lubrication system oil filter and temperature control device according to claim 8, characterized in that: The partition plate (17) is made of a heat-insulating material, and one-way valves (16) are provided at the third outlet (33), the third inlet (34), both ends of the normal temperature water pipeline (19) and the engine oil outlet (11).

10. A working method applicable to the integrated diesel engine lubrication system oil filtration and temperature control device according to any one of claims 4 to 9, characterized in that: The steps include: Step 1: The engine oil enters the filter unit (30) through the third inlet (34) and is filtered by the filter element (36) to remove impurities and particulate matter; Step 2: The filtered engine oil flows through the four-way valve (23) to the temperature selection unit (20). The temperature selection unit (20) adjusts the temperature according to the temperature of the engine oil in the following manner: When the oil temperature exceeds 80° C., the high temperature opening valve (21) opens, the oil enters the cooling part in the temperature regulating unit (10), and step three is executed; When the engine oil temperature is lower than 10°C, the low temperature opening valve (22) opens, the engine oil enters the heating part in the temperature regulating unit (10), and step 4 is executed; When the oil temperature is 10°C ≤ ≤ 80°C, the pressure in the four-way valve (23) increases continuously and exceeds the pressure set by the pressure valve, the pressure valve opens, and the oil enters the normal temperature part in the temperature regulating unit (10), and step five is executed; Step 3: The coolant enters the cooling part of the temperature regulating unit (10) through the first inlet (14), flows in the copper tube (18) and exchanges heat with the surrounding engine oil. After lowering the temperature of the engine oil, the coolant flows out of the temperature regulating unit (10) through the first outlet (12); Step 4: The heating liquid enters the heating part of the temperature regulating unit (10) through the second inlet (15), flows in the copper tube (18) and exchanges heat with the surrounding engine oil. After the engine oil temperature is increased, the heating liquid flows out of the temperature regulating unit (10) through the second outlet (13); Step 5: The regulated engine oil returns to the engine circulation system through the engine oil outlet (11).

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