Engine oil filtering and cooling system and method

Abstract

The invention discloses an engine oil filtering and cooling system and method, and belongs to the technical field of mechanical equipment lubricating and cooling, the engine oil filtering and cooling system comprises an engine oil filter element and an engine oil radiator which are sequentially connected in series in the engine oil flowing direction, the two ends of the engine oil filter element are connected with first external bypass valves in parallel, and the two ends of the engine oil radiator are connected with second external bypass valves in parallel; the first external bypass valve and the second external bypass valve are both provided with warning units in an integrated mode. Engine oil can be filtered before entering the engine oil radiator, so that impurities in the engine oil are prevented from blocking the engine oil radiator.

Description

Technical Field

[0001] The present invention belongs to the technical field of lubrication and cooling of mechanical equipment, and in particular relates to an oil filtering and cooling system and method. Background Art

[0002] The lubrication system is a crucial component of mechanical equipment, such as engines. It not only lubricates moving parts like bearings, bushings, gears, and chains, reducing wear on these components during operation, but also removes impurities generated during operation, preventing them from entering the moving parts and damaging the lubricant film. It also cools high-temperature components like pistons, dissipating heat generated during operation and improving component reliability.

[0003] Currently, in common engine lubrication systems, the oil radiator is usually placed before the oil filter. The oil in the engine oil pan enters the oil pump through the oil suction pipe. The oil pressurized by the oil pump enters the oil radiator to cool down, and then is filtered through the oil filter to remove impurities. The filtered clean oil then enters the engine to lubricate and cool components such as bearings, bushings, and pistons, and removes impurities and heat generated by friction and wear between components, thus fulfilling the function of the engine lubrication system. When the engine is used for a long time or the oil filled is of poor quality, in the above-mentioned engine lubrication system workflow, the oil without impurities removed directly enters the oil radiator. Impurities in the oil will remain in the oil chamber of the oil radiator. Long-term use will cause the impurities in the radiator to gradually increase, the cooling performance of the oil radiator will decrease, and even blockage and failure will occur, ultimately leading to serious damage to the engine such as shaft seizure, bearing burning, and cylinder scuffing. Summary of the Invention

[0004] To address the problem of unremoved oil directly entering the oil radiator, leading to radiator blockage, in conventional engine lubrication systems when the engine is used for a long time or when the oil is of poor quality, the present invention provides an oil filtration and cooling system and method that filters the oil before it enters the oil radiator, thereby preventing impurities in the oil from clogging the radiator.

[0005] The technical solution adopted by the oil filtering and cooling system and method of the present invention is:

[0006] An oil filtration and cooling system includes an oil filter element and an oil radiator connected in series along the direction of oil flow, a first external bypass valve is connected in parallel at both ends of the oil filter element, and a second external bypass valve is connected in parallel at both ends of the oil radiator; wherein, the first external bypass valve and the second external bypass valve are both integrated with a warning unit.

[0007] A further improvement of the above technical solution of the present invention is that: the oil filter element includes internal filter paper and a built-in bypass valve, and at the same time, the oil inlet of the first external bypass valve is connected to the input end of the oil filter element, and the oil outlet of the first external bypass valve is connected to the output end of the oil filter element.

[0008] A further improvement of the above technical solution of the present invention is that the opening pressure of the first external bypass valve is higher than the opening pressure of the internal bypass valve of the oil filter element.

[0009] A further improvement of the above technical solution of the present invention is that: the oil inlet of the second external bypass valve is connected to the input end of the oil radiator, and the oil outlet of the second external bypass valve is connected to the output end of the oil radiator; at the same time, the coolant channel and the oil channel of the oil radiator are isolated and heat-exchanged by a metal partition.

[0010] A further improvement of the above technical solution of the present invention is that the opening pressure of the second external bypass valve is higher than the opening pressure of the first external bypass valve.

[0011] A further improvement of the above technical solution of the present invention is that: the warning unit is a warning marking line arranged in the transparent window of the bypass valve.

[0012] A further improvement of the above technical solution of the present invention is that the warning unit includes a displacement sensor arranged inside the valve body, which generates an electrical signal when the bypass valve is opened and outputs it to the alarm module.

[0013] A further improvement of the above technical solution of the present invention is that: the electrical signal is transmitted to the engine ECU via the CAN bus, and the ECU controls the instrument panel to light up the fault indicator light and limit the engine speed to no more than 70% of the rated value.

[0014] An oil filtration cooling method, using the cooling system described above, comprises the following steps:

[0015] S1. The oil output from the oil pump is first fed into the oil filter element for filtration, and then sent to the oil radiator for cooling;

[0016] S2. When the oil filter or oil radiator is blocked, the corresponding bypass valve opens.

[0017] A further improvement of the above technical solution of the present invention is that: the step S2 includes the following situations:

[0018] 1) The oil filter is clogged, and the built-in bypass valve of the oil filter cannot be opened. The first external bypass valve connected in parallel with the oil filter is opened;

[0019] 2) When the oil radiator is blocked, the second external bypass valve connected in parallel with the oil radiator opens;

[0020] 3) The oil filter and the oil radiator are blocked at the same time, and the built-in bypass valve of the oil filter cannot be opened. The first external bypass valve and the second external bypass valve are opened at the same time.

[0021] Due to the adoption of the above technical solution, the technical advancements achieved by the present invention include:

[0022] The present invention changes the oil processing flow from the traditional "heat dissipation first", i.e. oil pump → oil radiator → oil filter element, to "filtration first", i.e. oil pump → oil filter element → oil radiator; the oil of the present invention is first filtered by the oil filter element before entering the oil radiator, completely eliminating the industry problem of unfiltered impurities clogging the radiator oil channel; at the same time, the present invention can also prevent metal debris, carbon deposits and other hard particles from scouring the inner wall of the oil radiator, avoid excessive impurities inside the oil radiator leading to a decrease in heat dissipation efficiency, and reduce the heat dissipation efficiency attenuation rate of the oil radiator from the industry average of 35% to below 10%, thereby increasing the service life of the oil radiator. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the connection structure of an oil filtering and cooling system of the present invention.

[0024] In the attached figure: 1. Oil filter element; 11. Internal filter paper; 12. Built-in bypass valve;

[0025] 2. Oil radiator; 3. First external bypass valve; 4. Second external bypass valve. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments. In the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concept of the present invention.

[0027] The present invention provides an oil filtering and cooling system, such as Figure 1 As shown, the system includes an oil filter 1 and an oil radiator 2 connected in series. Specifically, the input end of the oil filter 1 is connected to the output end of the oil pump, the output end of the oil filter 1 is connected to the input end of the oil radiator 2, and the output end of the oil radiator 2 is connected to the interior of the engine. The coolant channel and the oil channel of the oil radiator 2 are separated and heat-exchanged by a metal partition.

[0028] The oil filter element 1 is mainly used to filter impurities in the oil to prevent the impurities in the oil from entering between the moving parts of the engine, causing abnormal friction and wear failures in the moving parts.

[0029] The oil filter element 1 typically consists of an internal filter paper 11 and a built-in bypass valve 12. The internal filter paper 11 is primarily used to filter impurities from the oil, removing impurities from the oil pumped in and storing them in the gaps between the filter paper to prevent them from circulating. The built-in bypass valve 12 is primarily used to bypass the oil, allowing it to bypass the clogged internal filter paper 11 and enter the engine's lubrication system directly. This bypass valve can, to a certain extent, protect the engine from abnormal friction and wear caused by insufficient oil supply to the lubrication system.

[0030] When the present invention is used on different devices, the oil filter element 1 can also be replaced by other filtering devices, and the internal filter paper 11 and the built-in bypass valve 12 can also be replaced by other types of structures. In some application scenarios, the built-in bypass valve 12 may not exist.

[0031] The oil radiator 2 of the present invention comprises a cooling water circuit and an oil circuit, which are disconnected and isolated from each other. The oil radiator 2 primarily serves to reduce the temperature of the engine oil and cool it. During use, a coolant or other cooling medium flows through the cooling water circuit of the oil radiator 2. The oil flows through the radiator's oil circuit, where the coolant removes heat from the oil itself through heat transfer, cooling the oil. This ensures that the engine oil within the engine does not overheat and degrade its lubrication properties, effectively preventing high-temperature deterioration of the oil.

[0032] In the present invention, a first external bypass valve 3 is connected in parallel to the outside of the oil filter 1. The oil inlet of this first external bypass valve 3 is connected in parallel to the input end of the oil filter 1, and the oil outlet of this first external bypass valve 3 is connected in parallel to the output end of the oil filter 1. A second external bypass valve 4 is connected in parallel to the outside of the oil radiator 2. The oil inlet of this second external bypass valve 4 is connected in parallel to the input end of the oil radiator 2, and the oil outlet of this second external bypass valve 4 is connected in parallel to the output end of the oil radiator 2. Furthermore, both the first external bypass valve 3 and the second external bypass valve 4 are integrated with warning units, which, when they are opened, alert the user that the corresponding bypass valve is open and requires prompt maintenance.

[0033] In the present invention, the opening pressures of the internal bypass valve 12, the first external bypass valve 3, and the second external bypass valve 4 in the oil filter 1 can be designed in a tiered manner according to user needs. Specifically, the opening pressure of the first external bypass valve 3 is higher than that of the internal bypass valve 12 in the oil filter 1, and the opening pressure of the second external bypass valve 4 is higher than that of the first external bypass valve 3.

[0034] The first external bypass valve 3 and the second external bypass valve 4 may be purely mechanical bypass valves commonly used in the prior art.

[0035] The present invention also provides an oil filtering and cooling method, comprising the following steps:

[0036] S1. The oil output by the oil pump is first input into the oil filter element 1 for filtration, and then sent to the oil radiator 2 for cooling.

[0037] S2. When the oil filter 1 or the oil radiator 2 is blocked, the corresponding bypass valve opens.

[0038] The above step S2 includes the following three situations:

[0039] 1) The oil filter 1 is clogged, and the built-in bypass valve 12 of the oil filter 1 cannot be opened, and the first external bypass valve 3 connected in parallel with the oil filter 1 is opened;

[0040] 2) When the oil radiator 2 is blocked, the second external bypass valve 4 connected in parallel with the oil radiator 2 is opened;

[0041] 3) The oil filter 1 and the oil radiator 2 are blocked at the same time, and the built-in bypass valve 12 of the oil filter 1 cannot be opened, and the first external bypass valve 3 and the second external bypass valve 4 are opened at the same time.

[0042] Example 1

[0043] In this embodiment, the opening pressure of the internal bypass valve 12 of the oil filter element 1 is 0.08 MPa, the opening pressure of the first external bypass valve 3 is 0.1 MPa, and the opening pressure of the second external bypass valve 4 is 0.2 MPa.

[0044] At the same time, in this embodiment, the warning units of the first external bypass valve 3 and the second external bypass valve 4 are warning marking lines set in the transparent windows of the bypass valves. When the bypass valves are opened, the corresponding warning marking lines move with the valve cores to the visible area.

[0045] Example 2

[0046] In this embodiment, the opening pressure of the internal bypass valve 12 of the oil filter element 1 is 0.1 MPa, the opening pressure of the first external bypass valve 3 is 0.15 MPa, and the opening pressure of the second external bypass valve 4 is 0.25 MPa.

[0047] Furthermore, in this embodiment, the warning units for the first and second external bypass valves 3 and 4 include displacement sensors installed within the corresponding bypass valves. When the bypass valves open, the displacement sensors generate an electrical signal that is output to the alarm module. This signal is then transmitted via the CAN bus to the engine ECU, which then illuminates the instrument panel's fault indicator and limits the engine speed to 70% of the rated value. This effectively enhances the engine's self-protection capabilities, improves overall reliability, prevents major engine damage, reduces repair costs, and improves engine efficiency.

[0048] In the above embodiment, the present invention provides an oil filtering and cooling system and method. The present invention changes the oil processing process from the traditional "heat dissipation priority", i.e., oil pump → oil radiator → oil filter element, to "filtration priority", i.e., oil pump → oil filter element → oil radiator; the oil of the present invention is first filtered by the oil filter element before entering the oil radiator, completely eliminating the industry problem of unfiltered impurities clogging the radiator oil channel; at the same time, the present invention can also prevent hard particles such as metal debris and carbon deposits from scouring the inner wall of the oil radiator, avoid excessive impurities inside the oil radiator leading to a decrease in heat dissipation efficiency, and reduce the heat dissipation efficiency attenuation rate of the oil radiator from the industry average of 35% to below 10%, thereby improving the service life of the oil radiator.

[0049] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Any modifications and improvements made to the technical solution of the present invention by a person of ordinary skill in the art without departing from the design concept of the present invention shall fall within the scope of protection of the present invention. The technical content for which protection is sought in the present invention is fully set forth in the claims.

Claims

1. An oil filtration and cooling system, characterized in that: The invention comprises an oil filter element (1) and an oil radiator (2) which are sequentially connected in series along the oil flow direction, a first external bypass valve (3) being connected in parallel at both ends of the oil filter element (1), and a second external bypass valve (4) being connected in parallel at both ends of the oil radiator (2); wherein both the first external bypass valve (3) and the second external bypass valve (4) are integrated with a warning unit.

2. The oil filtering and cooling system according to claim 1, characterized in that: The oil filter element (1) comprises an internal filter paper (11) and a built-in bypass valve (12), and the oil inlet of the first external bypass valve (3) is connected to the input end of the oil filter element (1), and the oil outlet of the first external bypass valve (3) is connected to the output end of the oil filter element (1).

3. The oil filtering and cooling system according to claim 2, characterized in that: The opening pressure of the first external bypass valve (3) is higher than the opening pressure of the internal bypass valve (12) of the oil filter element (1).

4. The oil filtering and cooling system according to claim 1, characterized in that: The oil inlet of the second external bypass valve (4) is connected to the input end of the oil radiator (2), and the oil outlet of the second external bypass valve (4) is connected to the output end of the oil radiator (2); at the same time, the coolant channel and the oil channel of the oil radiator (2) are isolated and heat-exchanged by a metal partition.

5. The oil filtering and cooling system according to claim 4, characterized in that: The opening pressure of the second external bypass valve (4) is higher than the opening pressure of the first external bypass valve (3).

6. The oil filtering and cooling system according to claim 1, characterized in that: The warning unit is a warning marking line arranged in the transparent window of the bypass valve.

7. The oil filtering and cooling system according to claim 1, characterized in that: The warning unit includes a displacement sensor arranged inside the valve body, which generates an electrical signal when the bypass valve is opened and outputs it to the alarm module.

8. The oil filtering and cooling system according to claim 7, characterized in that: The electrical signal is transmitted to the engine ECU via the CAN bus, and the ECU controls the instrument panel to light up the fault indicator light and limit the engine speed to no more than 70% of the rated value.

9. A method for filtering and cooling engine oil, characterized in that: Using the cooling system according to any one of claims 1 to 8 above, comprising the following steps: S1, the oil output by the oil pump is first input into the oil filter element (1) for filtration, and then sent to the oil radiator (2) for cooling; S2. When the oil filter (1) or the oil radiator (2) is blocked, the corresponding bypass valve opens.

10. The oil filtering and cooling method according to claim 9, characterized in that: The step S2 includes the following situations: 1) The oil filter element (1) is clogged, and the internal bypass valve (12) of the oil filter element (1) cannot be opened, and the first external bypass valve (3) connected in parallel with the oil filter element (1) is opened; 2) When the oil radiator (2) is blocked, the second external bypass valve (4) connected in parallel with the oil radiator (2) is opened; 3) The oil filter (1) and the oil radiator (2) are blocked at the same time, and the built-in bypass valve (12) of the oil filter (1) cannot be opened, and the first external bypass valve (3) and the second external bypass valve (4) are opened at the same time.

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