Engine oil radiator and engine oil filtering radiator assembly

By incorporating a mounting base plate, an oil replenishment layer, and a cooling module into the oil filter cooler assembly, the problem of some oil not being cooled is solved, achieving efficient heat dissipation and reducing processing difficulty and cost.

CN122014382APending Publication Date: 2026-05-12WENZHOU DEXIN AUTO PARTS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WENZHOU DEXIN AUTO PARTS CO LTD
Filing Date
2026-02-12
Publication Date
2026-05-12

AI Technical Summary

Technical Problem

In existing oil filter radiator assemblies, some oil is not cooled, resulting in high temperatures and poor heat dissipation. At the same time, the oil circuit is difficult to process and costly.

Method used

The design incorporates a mounting base, an oil supply layer, and a heat dissipation module. Oil enters through the oil supply channels and exits directly. Heat is conducted using the mounting base and the heat dissipation module, and cooling water further enhances heat dissipation efficiency. The base does not require an oil supply line.

Benefits of technology

It improves the heat dissipation effect of engine oil, reduces processing difficulty and cost, and enhances sealing performance and convenience.

✦ Generated by Eureka AI based on patent content.

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    Figure CN122014382A_ABST
Patent Text Reader

Abstract

The engine oil radiator comprises a mounting bottom plate, an engine oil supply layer and a radiating module, the engine oil supply layer is arranged between the mounting bottom plate and the radiating module, and an oil inlet hole and an oil outlet hole are formed in the mounting bottom plate; the heat dissipation module is provided with a first oil inlet and a first oil outlet; the engine oil supply layer is provided with a supply oil channel, one end of the supply oil channel is communicated with the oil inlet hole of the installation bottom plate and the first oil inlet of the heat dissipation module, and the other end of the supply oil channel is communicated with the oil outlet hole of the installation bottom plate and the first oil outlet of the heat dissipation module. The oil supply channel guarantees the engine oil flow of the oil outlet hole and guarantees engine oil supply after heat dissipation, meanwhile, the engine oil supply layer is integrated with the mounting bottom plate and the heat dissipation module, the temperature of engine oil in the oil supply channel is conducted through the mounting bottom plate and the heat dissipation module, the heat dissipation efficiency of the engine oil in the oil supply channel is improved, the temperature of the engine oil output by the oil outlet hole is reduced, and the service life of the engine oil is prolonged. And the heat dissipation effect is improved.
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Description

Technical Field

[0001] This invention relates to an improved oil cooler and oil filter cooler assembly. Background Technology

[0002] The oil filter and radiator assembly integrates filtration and heat dissipation, serving to filter and cool engine oil. Engine oil enters through the filter base, is filtered, and then a portion flows into the radiator, where it is cooled before exiting through the oil outlet. The remaining oil, without being cooled, exits through the replenishment oil passage within the filter base. This latter portion of oil is discharged from the outlet at a relatively high temperature, resulting in poor cooling performance. Furthermore, the oil passage is located within the filter base, making manufacturing more difficult and costly. Summary of the Invention

[0003] In view of the technical problems existing in the background art, the technical problem to be solved by the present invention is to provide an oil cooler and an oil filter cooler assembly with good heat dissipation effect and convenient processing.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This type of oil cooler is characterized by comprising a mounting base plate, an oil supply layer, and a heat dissipation module, wherein the oil supply layer is disposed between the mounting base plate and the heat dissipation module. The mounting base plate is provided with an oil inlet and an oil outlet; The heat dissipation module is provided with a first oil inlet and a first oil outlet; The oil supply layer is provided with an oil supply channel. One end of the oil supply channel is connected to the oil inlet of the mounting base plate and the first oil inlet of the heat dissipation module, and the other end of the oil supply channel is connected to the oil outlet of the mounting base plate and the first oil outlet of the heat dissipation module.

[0005] This invention is mounted on an oil filter housing assembly via a mounting base plate. The oil inlet and outlet are connected to the main oil inlet and main oil outlet of the oil filter housing assembly, respectively. Engine oil enters the oil cooler through the oil inlet. A portion of the oil flows through one end of the replenishment oil passage from the first oil inlet into the cooling module. After efficient cooling by the cooling module, the oil is output from the first oil outlet, and then through the other end of the replenishment oil passage from the outlet. The remaining oil flows directly from one end of the replenishment oil passage to the other end and is output from the outlet, ensuring sufficient oil flow at the outlet. Simultaneously, the oil replenishment layer is integrated with the mounting base plate and the cooling module. The oil temperature within the replenishment oil passage is conducted through the mounting base plate and the cooling module, accelerating the cooling efficiency of the oil within the replenishment oil passage, reducing the oil temperature output from the outlet, and improving the cooling effect.

[0006] Preferably, the side of the oil supply layer closest to the heat dissipation module is the upper surface, and the other side is the lower surface; The oil supply channel is a supply oil trough, which is located on the upper surface of the oil supply layer. The two ends of the supply oil trough are connected vertically, and the opening of the supply oil trough is open but sealed to the heat dissipation module. The oil in the supply oil trough is in direct contact with the heat dissipation module, accelerating heat conduction.

[0007] Preferably, the side of the oil supply layer closest to the heat dissipation module is the upper surface, and the other side is the lower surface; The oil supply channel is a vertically continuous channel, and the upper and lower surfaces of the oil supply layer are sealed to the heat dissipation module and the mounting base plate, respectively. The oil in the supply channel contacts the heat dissipation module and the mounting base plate, resulting in better heat dissipation.

[0008] Preferably, the mounting base plate is provided with a first water inlet and a first water outlet; The oil supply layer is provided with a second water inlet and a second water outlet. The heat dissipation module has a first water inlet and a first water outlet. The first water inlet, the second water inlet, and the first water outlet are vertically aligned, as are the first water outlet, the second water outlet, and the first water outlet. Cooling water passes through the mounting base plate, the oil supply layer, and the heat dissipation module, which not only improves the heat dissipation effect of the heat dissipation module but also enhances the cooling efficiency of the oil in the oil supply channels.

[0009] Preferably, the mounting base plate and the heat dissipation module clamp the oil supply layer, and the mounting base plate, the oil supply layer and the heat dissipation module are welded together as one unit.

[0010] An oil filter cooler assembly, characterized in that it includes an oil filter housing assembly and an oil cooler. The oil cooler includes a mounting base plate, an oil supply layer, and a heat dissipation module, wherein the oil supply layer is disposed between the mounting base plate and the heat dissipation module. The mounting base plate is provided with an oil inlet and an oil outlet; The heat dissipation module is provided with a first oil inlet and a first oil outlet; The oil supply layer is provided with an oil supply channel. One end of the oil supply channel is connected to the oil inlet of the mounting base plate and the oil inlet of the heat dissipation module, and the other end of the oil supply channel is connected to the oil outlet of the mounting base plate and the oil outlet of the heat dissipation module. The oil filter housing assembly includes an elongated base with an upper surface for mounting to an oil cooler. The upper surface of the base is provided with a second oil outlet and a second oil inlet. The mounting plate of the oil cooler is mounted on the upper surface of the base, and the second oil outlet communicates with the oil inlet, and the oil outlet communicates with the second oil inlet.

[0011] The radiator of the present invention has an oil supply passage, so the base does not need to be equipped with an oil supply passage, which greatly reduces the processing difficulty of the oil filter housing assembly; at the same time, it improves the oil cooling efficiency.

[0012] Preferably, one end of the base is provided with a filter housing, the filter housing having an inner cavity, the inner cavity being divided into an oil inlet cavity and an oil outlet cavity; The base has a main oil inlet and a main oil outlet at its bottom. The main oil inlet is connected to the oil inlet cavity, and the second oil outlet is connected to the oil outlet cavity. The second oil inlet is connected to the main oil outlet.

[0013] Preferably, the upper surface of the base is provided with a second water outlet and a second water inlet; The base is also provided with a main water inlet and a main water outlet at its bottom. The main water inlet is connected to the second water outlet, and the main water outlet is connected to the second water inlet.

[0014] Preferably, the base is provided with a mounting hole groove communicating with the second oil inlet, and a matching mounting sleeve and a retaining spring are sequentially installed in the mounting hole groove, and the mounting sleeve is provided with internal threads; The mounting hole groove is provided with a limiting protrusion, and the mounting sleeve is provided with a limiting groove that matches the limiting protrusion; The mounting sleeve has an annular groove on its outer side, and a sealing ring is installed inside the annular groove. The mounting sleeve and the mounting hole groove are sealed together. The mounting sleeve and the base are separate structures. When the internal thread is damaged, the mounting sleeve can be replaced, reducing maintenance costs. The mounting sleeve is easy to install and remove; simply insert the mounting sleeve and the retaining spring in sequence. The limiting protrusion restricts the circumferential rotation of the mounting sleeve, while the retaining spring restricts the axial movement of the mounting sleeve. The sealing ring is not easily displaced within the annular groove. The sealing ring not only provides a sealing function but also has high friction, making it difficult for the mounting sleeve to shift axially relative to the mounting hole groove.

[0015] Preferably, the radiator is bolted to the base; The base is provided with an oil passage that communicates with the oil outlet cavity of the filter housing, and the second oil outlet extends vertically downward and communicates with the oil passage inside the base. The oil passage is inclined, and the process port of the oil passage is located on the side of the base; The upper surface of the base is provided with a weight-reducing groove. Therefore, the base does not need to be equipped with an oil supply line, which makes it easier to set up the weight-reducing groove. The increase of the weight-reducing groove reduces the weight and material cost. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the oil filter radiator assembly of the present invention.

[0017] Figure 2 This is a schematic diagram of the heat sink of the present invention.

[0018] Figure 3 This is an exploded view of the heat sink of the present invention.

[0019] Figure 4 A schematic diagram of the oil filter housing assembly of the present invention.

[0020] Figure 5 This is an exploded view of the oil filter housing assembly of the present invention.

[0021] Figure 6 This is a bottom view of the oil filter housing assembly of the present invention.

[0022] Figure Descriptions: 1. Oil filter housing assembly; 2. Oil cooler; 3. Mounting base plate; 31. Oil inlet; 32. Oil outlet; 33. First water inlet; 34. First water outlet; 4. Oil supply layer; 41. Oil supply passage; 411. Inlet end; 412. Outlet end; 42. Second water inlet; 43. Second water outlet; 5. Cooling module; 51. First oil inlet; 52. First oil outlet; 53. First water inlet; 54. First... 6. Water outlet; 6. Base; 61. Second oil outlet; 62. Second oil inlet; 63. Second water outlet; 64. Second water inlet; 65. Upper surface of base; 66. Weight reduction groove; 67. Mounting hole groove; 68. Mounting sleeve; 681. Limiting groove; 682. Annular groove; 69. Snap ring; 7. Filter housing; 81. Main oil inlet; 82. Main oil outlet; 83. Main water inlet; 84. Main water outlet; 91. Oil passage; 92. Process port. Detailed Implementation

[0023] The following description, in conjunction with the accompanying drawings, details the embodiments and working principles of the present invention.

[0024] An oil filter cooler assembly includes an oil filter housing assembly 1 and an oil cooler 2. The oil cooler 2 includes a mounting base plate 3, an oil supply layer 4, and a cooling module 5. The oil supply layer is disposed between the mounting base plate and the cooling module, and the cooling module dissipates heat through multiple cooling layers. The mounting base plate 3 has an oil inlet 31 and an oil outlet 32; the cooling module 5 has a first oil inlet 51 and a first oil outlet 52; the oil supply layer 4 has an oil supply passage 41, one end of which communicates with the oil inlet 31 of the mounting base plate and the first oil inlet 51 of the cooling module (for ease of description, this end of the oil supply passage 41 is called the inlet end 411), and the other end of which communicates with the oil outlet 32 ​​of the mounting base plate and the first oil outlet 52 of the cooling module (this end is called the outlet end 412). Engine oil enters the oil cooler 2 through the oil inlet 31. Part of the oil enters the cooling module 5 from the inlet 411 of the oil supply channel via the first inlet 51. After efficient cooling by the cooling module, the oil is output from the first outlet 52, and then from the outlet 32 ​​through the outlet 412 of the oil supply channel. The remaining oil flows directly from the inlet 411 to the outlet 412 of the oil supply channel and is output from the outlet 32. The oil supply channel 41 ensures sufficient oil flow at the outlet, guaranteeing the supply of cooled oil. The oil supply layer 4 is integrated with the mounting base 3 and the cooling module 5. The oil in the oil supply channel undergoes heat conduction through the mounting base 3 and the cooling module 5, accelerating the cooling efficiency of the oil in the oil supply channel 41, further reducing the oil temperature output from the outlet 32, and improving the cooling effect.

[0025] The oil supply layer 4 has its upper surface on the side closest to the heat dissipation module 5, and its lower surface on the other side. The oil supply channel 41 can be a through-type design from top to bottom or a through-type design from both ends.

[0026] Example 1 (Drawings not provided). The oil supply channel is an oil supply trough, which is located on the upper surface of the oil supply layer. The two ends of the oil supply trough are vertically connected, respectively communicating with the oil inlet 31, the first oil inlet of the heat dissipation module, the oil outlet 32 ​​of the mounting base plate, and the first oil outlet of the heat dissipation module. The opening of the oil supply trough is open but sealed to the heat dissipation module 5, meaning the oil in the oil supply trough is in direct contact with the heat dissipation module. This allows the oil to conduct heat through the heat dissipation module, accelerating oil cooling.

[0027] Example 2, see appendix Figure 3 The oil supply channel 41 is a vertically connected supply channel. The upper and lower surfaces of the oil supply layer 4 are sealed to the heat dissipation module 5 and the mounting base plate 3, respectively. The oil in the supply channel is in direct contact with the heat dissipation module 5 and the mounting base plate 3. The oil undergoes heat conduction through the heat dissipation module to accelerate the cooling of the oil.

[0028] The radiator uses aluminum to accelerate heat dissipation. The mounting base plate, oil supply layer, and heat dissipation module are processed separately and independently. The mounting base plate 3 and the heat dissipation module 5 clamp the oil supply layer 4, and the three components are welded together. Separate processing is more convenient and efficient, while welding connects the mounting base plate, oil supply layer, and heat dissipation module into a single unit, resulting in strong sealing and high heat dissipation efficiency.

[0029] To further improve heat dissipation efficiency, the mounting base plate 3 is provided with a first water inlet 33 and a first water outlet 34; the oil supply layer 4 is provided with a second water inlet 42 and a second water outlet 43; the heat dissipation module 5 is provided with a first water inlet 53 and a first water outlet 54. The first water inlet 33, the second water inlet 42 and the first water outlet 53 are vertically aligned, and the first water outlet 34, the second water outlet 43 and the first water outlet 54 are vertically aligned. That is, the first water inlet 33, the second water inlet 42 and the first water inlet 53 are connected, and the first water outlet 54, the second water outlet 43 and the first water outlet 34 are connected. Cooling water enters from the first water inlet, flows through the heat dissipation module, absorbs the heat of the heat dissipation module and the oil, and is then output from the first water outlet. Cooling water passes through mounting base plate 3, oil supply layer 4, and heat dissipation module 5, which not only rapidly cools down the heat dissipation module 5 and the oil inside the heat dissipation module 5, but also accelerates the cooling of the oil in the oil supply channel 41.

[0030] The oil filter housing assembly 1 includes an elongated base 6. The base has an upper surface for mounting to the oil cooler 2. The upper surface 65 of the base is provided with a second oil outlet 61 and a second oil inlet 62. The mounting plate 3 of the oil cooler is mounted on the upper surface 65 of the base. The second oil outlet 61 corresponds vertically to and communicates with the oil inlet 31, and the oil outlet 32 ​​corresponds vertically to and communicates with the second oil inlet 62. In the figure, the mounting plate 3 is connected to the base 6 by bolts, meaning the cooler is bolted to the base 6. The cooler and the oil filter housing assembly 1 are detachable. The cooler of this invention has an oil supply passage 41, thus eliminating the need for an oil supply passage on the base 6, greatly reducing the processing difficulty of the oil filter housing assembly; it also improves oil cooling efficiency.

[0031] One end of the base 6 is provided with a filter housing 7. The filter housing has an inner cavity containing a filter element. The inner cavity is divided into an oil inlet cavity and an oil outlet cavity. The oil pumped into the oil inlet cavity is filtered by the filter element and then enters the oil outlet cavity. The oil output from the oil outlet cavity is the filtered oil. The bottom of the base is provided with a main oil inlet 81 and a main oil outlet 82. The main oil inlet 81 communicates with the oil inlet cavity, the second oil outlet 61 communicates with the oil outlet cavity, and the second oil inlet 62 communicates with the main oil outlet 82. The upper surface 65 of the base is also provided with a second water outlet 63 and a second water inlet 64; the bottom of the base 6 is also provided with a main water inlet 83 and a main water outlet 84. The main water inlet communicates with the second water outlet, and the second water outlet corresponds vertically to and communicates with the first water inlet 33; the main water outlet 84 communicates with the second water inlet 64, and the first water outlet 34 and the second water inlet 64 correspond vertically to and communicate with each other.

[0032] The base 6 is provided with an oil passage 91 that communicates with the oil outlet cavity of the filter housing. The second oil outlet 61 extends vertically downward and communicates with the oil passage 91 within the base; that is, the second oil outlet 61 communicates with the oil outlet cavity of the filter housing through the oil passage 91. The oil passage 91 is inclined, and the process port 92 of the oil passage is located on the side of the base 6. This shortens the length of the oil passage and provides more space on the side, avoiding conflict with the process port 92 of the water passage and facilitating mold design.

[0033] The base 6 is also provided with a mounting slot 67 communicating with the second oil inlet 62. At least one mounting slot is provided. A matching mounting sleeve 68 and a retaining spring 69 are sequentially installed in the mounting slot 67. The mounting sleeve 68 has internal threads, through which sensors, such as temperature sensors and pressure sensors, can be threadedly connected for detecting oil temperature and oil pressure. A limiting protrusion is provided in the mounting slot 67, and the mounting sleeve 68 has a limiting groove 681 that matches the limiting protrusion. The mounting sleeve is inserted into the mounting slot, and the limiting protrusion is inserted into the limiting groove 681. The mounting sleeve and base are separate structures. When the internal thread is damaged, the mounting sleeve 68 can be replaced, reducing maintenance costs. The mounting sleeve is easy to install and remove; simply insert the mounting sleeve 68 and retaining spring 69 sequentially. The limiting protrusion restricts the circumferential rotation of the mounting sleeve 68, while the retaining spring 69 restricts the axial movement of the mounting sleeve 68. The mounting sleeve is provided with an annular groove 682 on the outside, and a sealing ring is provided in the annular groove to seal the mounting sleeve with the mounting hole groove. The sealing ring is not easy to move in the annular groove 682. The sealing ring not only plays a sealing role, but also has a large friction force. When the mounting sleeve 68 is inserted into the mounting hole groove 67, the sealing ring plays a certain limiting role. In addition, a retaining spring 69 is added to block the mounting sleeve 68, which can firmly limit the mounting sleeve in the mounting hole groove 67.

[0034] To reduce weight and lower costs, the upper surface 65 of the base is provided with a weight-reducing groove 66. Therefore, the base 6 does not need to be equipped with an oil supply line, which makes it easier to set up the weight-reducing groove 66. The increase of the weight-reducing groove reduces weight and material costs.

[0035] The working principle of the preferred embodiment is further explained below with reference to the accompanying drawings: Engine oil enters the oil inlet cavity through the main oil inlet 81 of the base 6. After being filtered by the filter element, the engine oil exits through the oil outlet cavity and from the second oil outlet 61. It also enters through the oil inlet 31 of the radiator. After passing through the oil inlet 31, part of the engine oil enters the cooling module 5 through the first oil inlet 51 from the inlet end 411 of the replenishment oil passage. After being efficiently cooled by the cooling module 5, the engine oil exits from the first oil outlet 52 and then exits from the oil outlet 32 ​​through the outlet end 412 of the replenishment oil passage. The other part of the engine oil goes directly from the inlet end 411 of the replenishment oil passage 41 to the outlet end 412 and exits from the oil outlet 32. The engine oil exiting from the oil outlet 32 ​​collects the engine oil that has been efficiently cooled by the cooling module and the engine oil supplied through the replenishment oil passage 41. The engine oil exiting from the oil outlet enters from the second oil inlet 62 of the base 6 and finally exits from the main oil outlet 82. Coolant enters from the main inlet 83 of the base 6, exits from the second outlet 63, and enters from the first inlet 33 of the radiator. Cooling water passes through the second inlet 42 and enters the cooling module 5 from the first inlet 53. The cooling water absorbs the heat from the cooling module 5 and the engine oil and accelerates the cooling of the radiator module and the engine oil. After flowing through the cooling module 5, the cooling water is exited from the first outlet 54, and then passes through the second outlet 43, the first outlet 34, and the second inlet 64 in sequence, and finally exits from the main outlet 84. This cycle continues.

Claims

1. An oil cooler, characterized in that: It includes a mounting base plate, an oil supply layer, and a heat dissipation module, wherein the oil supply layer is disposed between the mounting base plate and the heat dissipation module. The mounting base plate is provided with an oil inlet and an oil outlet; The heat dissipation module is provided with a first oil inlet and a first oil outlet; The oil supply layer is provided with an oil supply channel. One end of the oil supply channel is connected to the oil inlet of the mounting base plate and the first oil inlet of the heat dissipation module, and the other end of the oil supply channel is connected to the oil outlet of the mounting base plate and the first oil outlet of the heat dissipation module.

2. The oil cooler according to claim 1, characterized in that: The side of the oil supply layer closest to the heat dissipation module is the upper surface, and the other side is the lower surface; The oil supply channel is a supply oil trough, which is located on the upper surface of the oil supply layer. The two ends of the supply oil trough are connected vertically, and the opening of the supply oil trough is open and sealed to the heat dissipation module.

3. The oil cooler according to claim 1, characterized in that: The side of the oil supply layer closest to the heat dissipation module is the upper surface, and the other side is the lower surface; The oil supply channel is a vertically connected supply channel, and the upper and lower surfaces of the oil supply layer are respectively sealed to the heat dissipation module and the mounting base plate.

4. The oil cooler according to claim 1, characterized in that: The mounting base plate is provided with a first water inlet hole and a first water outlet hole; The oil supply layer is provided with a second water inlet and a second water outlet. The heat dissipation module is provided with a first water inlet and a first water outlet. The first water inlet, the second water inlet and the first water outlet are vertically aligned, and the first water outlet, the second water outlet and the first water outlet are vertically aligned.

5. The oil cooler according to claim 1, characterized in that: The mounting base plate and the heat dissipation module clamp the oil supply layer, and the mounting base plate, the oil supply layer and the heat dissipation module are welded together as one unit.

6. An oil filter radiator assembly, characterized in that: Includes an oil filter housing assembly and an oil cooler as described in any one of claims 1-5. The oil filter housing assembly includes an elongated base with an upper surface for mounting to an oil cooler. The upper surface of the base is provided with a second oil outlet and a second oil inlet. The mounting plate of the oil cooler is mounted on the upper surface of the base, and the second oil outlet communicates with the oil inlet, and the oil outlet communicates with the second oil inlet.

7. The oil filter radiator assembly according to claim 6, characterized in that: One end of the base is provided with a filter housing, the filter housing having an inner cavity, the inner cavity being divided into an oil inlet inner cavity and an oil outlet inner cavity; The base has a main oil inlet and a main oil outlet at its bottom. The main oil inlet is connected to the oil inlet cavity, and the second oil outlet is connected to the oil outlet cavity. The second oil inlet is connected to the main oil outlet.

8. The oil filter radiator assembly according to claim 7, characterized in that: The upper surface of the base is provided with a second water outlet and a second water inlet; The base is also provided with a main water inlet and a main water outlet at its bottom. The main water inlet is connected to the second water outlet, and the main water outlet is connected to the second water inlet.

9. The oil filter housing assembly according to claim 7, characterized in that: The base is provided with a mounting hole groove communicating with the second oil inlet. A matching mounting sleeve and a retaining spring are sequentially installed in the mounting hole groove. The mounting sleeve is provided with internal threads. The mounting hole groove is provided with a limiting protrusion, and the mounting sleeve is provided with a limiting groove that matches the limiting protrusion; The mounting sleeve has an annular groove on its outside, and a sealing ring is provided inside the annular groove. The mounting sleeve is sealed to the mounting hole groove.

10. The oil filter housing assembly according to claim 9, characterized in that: The radiator is bolted to the base; The base is provided with an oil passage that communicates with the oil outlet cavity of the filter housing, and the second oil outlet extends vertically downward and communicates with the oil passage inside the base. The oil passage is inclined, and the process port of the oil passage is located on the side of the base; The upper surface of the base is provided with a weight-reducing groove.