An oil filter and engine

Abstract

The present disclosure relates to the technical field of filter, and particularly relates to a machine oil filter and an engine. The machine oil filter has an additive supplement function, part of the machine oil flows through the slow-release assembly to realize continuous supplement of the additive and improve the service life of the machine oil. The machine oil flowing in through the oil inlet of the shell is divided into two oil paths, part of the machine oil directly flows to the filter assembly, and flows to the oil outlet cavity after being filtered by the filter assembly, and the other part of the machine oil does not pass through the filter, but directly flows into the containing cavity through the oil inlet channel, which can avoid the increase of the whole oil resistance of the machine oil filter to a certain extent, so that the pressure difference before and after the oil inlet and the oil outlet of the shell does not change greatly before and after the slow-release assembly is added. The slow-release assembly is located in the oil outlet cavity surrounded by the filter assembly, which ensures the compactness of the overall structure of the machine oil filter, and additional installation space is not needed for the slow-release assembly, so as to cause the size of the machine oil filter to become larger.

Description

Technical Field

[0001] This disclosure relates to the field of filter technology, and more particularly to an oil filter and an engine. Background Technology

[0002] Currently, automobiles are commonly equipped with oil filters to remove impurities such as dust, metal particles, carbon deposits, and soot particles from the engine oil, ensuring its cleanliness and extending its service life. Engine oil is composed of base oil and additives blended in a specific ratio. As the vehicle's mileage increases, the organic matter in the oil is gradually consumed, leading to a gradual decline in oil performance and a shorter lifespan. Regular oil changes and topping up are necessary, increasing operating costs. Therefore, ensuring continuous replenishment of additives to extend the engine oil's lifespan is crucial. Utility Model Content

[0003] To solve the above-mentioned technical problems, this disclosure provides an oil filter and an engine.

[0004] On one hand, this disclosure provides an oil filter, comprising:

[0005] The housing is hollow inside and has an oil inlet and an oil outlet for oil to flow through it.

[0006] A filter assembly is disposed within the housing. The filter assembly has an oil outlet chamber that communicates with the oil outlet. An oil inlet channel that communicates with the oil inlet is defined between the filter assembly and the housing. Part of the engine oil flowing in through the oil inlet is filtered by the filter assembly and flows into the oil outlet chamber, while the other part flows into the oil inlet channel.

[0007] A slow-release component is disposed in the oil outlet chamber. The slow-release component has a receiving chamber for containing additives. The receiving chamber has an inlet end communicating with the oil inlet channel and an outlet end communicating with the oil outlet chamber. The engine oil in the oil inlet channel enters the receiving chamber through the inlet end and then flows into the oil outlet chamber through the outlet end.

[0008] Optionally, the filter assembly includes a filter body that surrounds the oil outlet chamber; the slow-release assembly can abut against the inner peripheral wall of the filter body to radially support the filter body.

[0009] Optionally, the inlet end is positioned higher than the outlet end.

[0010] Optionally, the slow-release component has a protrusion extending upward toward the receiving cavity, a connecting channel is provided in the protrusion, the liquid inlet is disposed at one end of the protrusion near the top wall of the receiving cavity, one end of the connecting channel is connected to the liquid inlet, and the other end is connected to the oil inlet channel.

[0011] Optionally, the protrusion is spaced apart from the inner top wall of the receiving cavity.

[0012] Optionally, the liquid outlet is located on the peripheral wall of the receiving cavity, and the liquid inlet is located on the side of the protrusion opposite to the liquid outlet.

[0013] Optionally, the sustained-release component includes:

[0014] The base is connected to the housing;

[0015] A support is fastened to the top of the base, and the support has a cavity with one end open. The cavity and the base enclose the receiving cavity.

[0016] Optionally, the oil filter further includes a safety valve having a first state and a second state. The safety valve includes a valve plate and an elastic element. The valve plate has a liquid passage port communicating with the oil outlet. The elastic element is disposed between the support and the valve plate. The filter assembly includes a top plate with a pressure relief port that communicates with the oil inlet and the oil outlet.

[0017] In the first state, the elastic element pushes against the valve plate to block the pressure relief port;

[0018] In the second state, the engine oil enters the pressure relief port and pushes the valve plate downward, so that the engine oil can flow through the pressure relief port to the oil outlet.

[0019] Optionally, the support includes a base and a support body, the cavity is disposed on the base, the base protrudes in the direction of the top plate to form a stepped portion, the elastic element is sleeved on the stepped portion, and the support body is located above the base and surrounds the elastic element.

[0020] Secondly, this disclosure provides an engine that includes the aforementioned oil filter.

[0021] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0022] This oil filter features an additive replenishment function. By allowing a portion of the oil to flow through the slow-release component, the additive is continuously replenished, extending the oil's lifespan. The oil flowing in through the housing inlet is divided into two paths: one portion flows directly to the filter component, is filtered, and then flows to the outlet chamber; the other portion flows directly into the receiving chamber through the inlet channel without filtration. This design helps prevent an increase in overall oil resistance, ensuring that the pressure difference between the inlet and outlet of the housing remains relatively constant before and after the addition of the slow-release component. Furthermore, the slow-release component is entirely located within the outlet chamber surrounded by the filter component, maintaining the compactness of the overall oil filter structure and eliminating the need for additional installation space, thus preventing an increase in the overall size of the oil filter.

[0023] The engine includes the aforementioned oil filter, which has an additive replenishment function, which helps to extend the service life of the engine oil, reduce the frequency of oil changes, and lower operating costs. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0025] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the oil filter described in the embodiments of this disclosure. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the structure of the oil filter described in the embodiments of this disclosure. Figure 2 ;

[0028] Figure 3 This is a cross-sectional schematic diagram of an oil filter with concealed elastic elements according to an embodiment of this disclosure;

[0029] Figure 4 This is a cross-sectional schematic diagram of an oil filter with an elastic element according to an embodiment of this disclosure;

[0030] Figure 5 This is a partial structural schematic diagram of the oil filter described in an embodiment of the present disclosure;

[0031] Figure 6 for Figure 5 A cross-sectional schematic diagram;

[0032] Figure 7 A schematic diagram of the cross-section of an oil filter with the elastic element hidden when the valve plate moves downward;

[0033] Figure 8 This is a schematic diagram of the structure of the housing described in an embodiment of this disclosure.

[0034] in:

[0035] 1. Housing; 10. Oil inlet channel; 11. Second clip;

[0036] 2. Filter assembly; 20. Oil outlet chamber; 21. Top plate; 211. Pressure relief port; 22. Filter body; 23. Bottom plate;

[0037] 3. Slow-release component; 30. Receiving cavity; 301. Liquid inlet; 302. Liquid outlet; 31. Base; 311. Protrusion; 3110. Connecting channel;

[0038] 32. Support; 321. Seat body; 3211. Stepped portion; 322. Support body; 33. One-way valve; 34. Seal; 35. First snap-fit;

[0039] 4. Safety valve; 41. Valve plate; 411. Liquid passage port; 42. Elastic element. Detailed Implementation

[0040] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0041] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0042] The structure of the oil filter in this embodiment is as follows: Figures 1-4 As shown, it includes a housing 1, a filter assembly 2, and a slow-release assembly 3. The housing 1 is hollow and has an oil inlet (not shown) and an oil outlet (not shown) for oil flow. For ease of illustration, this embodiment only shows the lower half of the housing 1. In some embodiments, the housing 1 may consist of a split upper housing and a lower housing, which are fastened together to form a hollow housing 1. Exemplarily, a threaded split connection may be used.

[0043] The filter assembly 2 is disposed within the housing 1. The filter assembly 2 is a commonly used filter component in the field, primarily used to filter out particulate impurities from engine oil. For example... Figure 2 and Figure 3As shown, it includes a top plate 21, a filter body 22, and a bottom plate 23. The top plate 21 and bottom plate 23 are annular plates. The filter body 22 is filter paper commonly used in the field. The filter body 22 is disposed between the top plate 21 and the bottom plate 23 to form an oil outlet chamber 20 that communicates with the oil outlet of the housing 1. An oil inlet channel 10 communicating with the oil inlet is defined between the filter assembly 2 and the housing 1. Figure 3 As shown, in this embodiment, the filter assembly 2 is circumferentially spaced from the housing 1, forming a circumferentially connected oil inlet channel 10 between the housing 1 and the filter element 22 to allow some engine oil to flow in. In this embodiment, the oil inlet path is mainly divided into two paths. Figure 3 The arrows indicate the direction of oil flow. A portion of the oil flowing in through the inlet is filtered by the filter assembly 2 and flows into the outlet chamber 20, from where it further flows out to the outlet of the housing 1. The remaining oil flowing in through the inlet enters the oil inlet channel 10 formed by the filter assembly 2 and the housing 1.

[0044] Furthermore, the slow-release component 3 is disposed within the oil outlet chamber 20, and the slow-release component 3 has a receiving chamber 30 for containing the additive. The additive in this embodiment can be a commonly used additive for improving engine oil performance. For example, the additive can be neutral synthetic calcium sulfur, low-base-value synthetic calcium sulfur, medium-base-value synthetic calcium sulfur, high-base-value synthetic calcium sulfur, alkylphenol calcium sulfide, etc. Alternatively, the additive can be an ashless dispersant, such as polyisobutylene monosuccinimide, high molecular weight polyisobutylene bissuccinimide, etc. The additive is uniformly added to the receiving chamber 30. The dosage of the additive is preferably matched as closely as possible to the service life of the filter body 22, such that the remaining dosage of the additive is low when the filter body 22 reaches its service life, or the filter body 22 is nearing the end of its service life when the additive is used up. An appropriate dosage of additive is selected based on actual needs and usage scenarios, and added to the receiving chamber 30 before leaving the factory.

[0045] Specifically, please refer to Figure 3 The receiving cavity 30 has an inlet end 301 communicating with the oil inlet channel 10 and an outlet end 302 communicating with the oil outlet cavity 20. After the engine oil in the oil inlet channel 10 enters the receiving cavity 30 through the inlet end 301, it is fully dissolved with the additives in the receiving cavity 30 and then flows into the oil outlet cavity 20 through the outlet end 302, where it mixes with the engine oil in the oil outlet cavity 20 and flows together to the oil outlet of the housing 1.

[0046] The oil filter in this embodiment has an additive replenishment function. By allowing a portion of the oil to flow through the slow-release component 3, the additive is continuously replenished, extending the oil's service life. Furthermore, the oil flowing in through the inlet of the housing 1 is divided into two paths: one part flows directly to the filter component 2, is filtered, and then flows to the outlet chamber 20; the other part flows directly into the receiving chamber 30 through the inlet channel 10 without filtration. This helps to prevent an increase in the overall oil resistance of the oil filter, ensuring that the pressure difference between the inlet and outlet of the housing 1 does not change significantly before and after the addition of the slow-release component 3. Moreover, the slow-release component 3 is entirely located within the outlet chamber 20 surrounded by the filter component 2, ensuring the compactness of the overall oil filter structure. No additional installation space is needed for the slow-release component 3, thus avoiding an increase in the overall size of the oil filter.

[0047] It is worth noting that the overall oil resistance of the oil filter referred to in this embodiment is from a macroscopic perspective. In existing oil filters that do not have the function of adding additives, the oil only flows through the filter component 2, and the overall oil resistance of the oil filter is mainly caused by the filter component 2.

[0048] This embodiment adds a slow-release component 3 to minimize changes in the overall oil resistance of the oil filter. This is to prevent an increase in the overall oil resistance after adding the slow-release component 3, which could lead to a decrease in the oil flow efficiency at the oil outlet of the housing 1. In this embodiment, a portion of the unfiltered oil from the filter component 2 is directly guided to the receiving cavity 30 using a parallel oil circuit. It is understandable that if the filtered oil from the filter component 2 were further guided to the receiving cavity 30, i.e., if the filter component 2 and the receiving cavity 30 were connected in series, the overall oil resistance of the oil filter would inevitably increase significantly, resulting in a decrease in the oil flow efficiency. Therefore, this embodiment uses a parallel oil circuit to minimize the overall oil resistance of the oil filter, ensuring that the overall oil resistance of the oil filter does not increase before and after adding the slow-release component 3.

[0049] In some embodiments, once the type and dosage of the additive are selected, the flow resistance of the oil path flowing through the containment cavity 30 can be changed by altering the opening size of the inlet end 301 and / or outlet end 302 connected to the containment cavity 30, so that the flow resistance of the oil path flowing through the containment cavity 30 and the flow resistance of the filter assembly 2 are as similar as possible. In this embodiment, it is preferable to keep them as close as possible at the time of manufacture.

[0050] In some embodiments, after the oil filter is filled with oil, the slow-release component 3 can abut against the inner peripheral wall of the filter body 22 to radially support the filter body 22 and prevent the filter body 22 from collapsing and deforming. It is understood that after the oil filter is filled with oil, the filter body 22 will absorb oil and soften. In this embodiment, the outer peripheral wall of the slow-release component 3 can abut against the inner peripheral wall of the filter body 22 after the filter body 22 absorbs oil, to radially support the filter body 22 and prevent it from collapsing and deforming. The radial dimension of the slow-release component 3 is adapted to the radial dimension of the inner periphery of the filter body 22. Ideally, in the factory state, the slow-release component 3 can leave a small gap with the inner periphery of the filter body 22, and after the filter body 22 absorbs oil and softens, the slow-release component 3 can contact the peripheral wall of the filter body 22 to effectively support the filter body 22.

[0051] In some embodiments, the inlet end 301 is positioned higher than the outlet end 302 so that the oil entering through the inlet end 301 can flow from top to bottom in the receiving cavity 30 under the action of gravity, so that the oil can fully mix with the additives in the receiving cavity 30 and then flow out from the lower outlet end 302, thereby improving the mixing effect of the oil and additives in the receiving cavity 30.

[0052] Specifically, such as Figure 3 , Figure 4 and Figure 6 As shown, the slow-release component 3 has a protrusion 311 extending upward toward the receiving cavity 30. The protrusion 311 has a connecting channel 3110 communicating with the oil inlet channel 10. The liquid inlet end 301 is located at the top of the protrusion 311, that is, the liquid inlet end 301 is located at one end of the protrusion 311 near the top wall of the receiving cavity 30, so that the liquid inlet end 301 can be located at a higher position. It is preferable to form a larger height difference between the liquid inlet end 301 and the liquid outlet end 302, so as to facilitate the full mixing of the engine oil and additives in the receiving cavity 30.

[0053] Preferably, the top of the protrusion 311 is spaced from the inner top wall of the receiving cavity 30, so that the oil flowing in through the inlet end 301 can be diverted into the receiving cavity 30, improving the mixing effect with the additive. For example, as... Figure 3 As shown, in this embodiment, the inlet end 301 is disposed on the peripheral wall of the protrusion 311. A portion of the oil flows directly downward in the receiving cavity 30 under the action of gravity, while another portion of the oil flows upward and passes through the gap between the protrusion 311 and the inner top wall of the receiving cavity 30, thereby realizing the diversion of the oil inlet end 301, which facilitates the improvement of the solubility effect with the additive.

[0054] Alternatively, the inlet end 301 can be directly positioned at the top of the protrusion 311, with a certain gap between the top of the protrusion 311 and the inner top wall of the receiving cavity 30, so that the oil flowing out from the inlet end 301 can be directly diverted and flowed down evenly from the highest position, depending on the actual needs of the design.

[0055] Furthermore, such as Figure 3 and Figure 6 As shown, in this embodiment, the outlet end 302 is located on the peripheral wall of the receiving cavity 30, and the inlet end 301 is disposed on the side of the protrusion 311 opposite to the outlet end 302. That is, the inlet end 301 and the outlet end 302 are arranged opposite to each other so that the oil flowing in through the inlet end 301 can fully mix with the additive in the receiving cavity 30, further improving the mixing effect. It can be understood that if the inlet end 301 and the outlet end 302 are arranged facing each other, some oil flowing in through the inlet end 301 will flow out directly from the outlet end 302 under the action of inertia, resulting in poor mixing effect.

[0056] Optionally, the sustained-release component 3 in this embodiment has a split structure to facilitate the addition of additives to the receiving cavity 30 during production. Specifically, the sustained-release component 3 may include a base 31 and a support 32. The base 31 and the support 32 are detachably connected, with the base 31 connected to the housing 1. The support 32 is fastened to the top of the base 31, and a cavity with one open end is provided inside the support 32. The cavity and the base 31 enclose the receiving cavity 30.

[0057] In addition, the sustained-release component 3 can also be an integral structure, with an additive injection port connected to the receiving cavity 30 pre-reserved during production for adding additives. After the additive is injected through this injection port, the injection port is then sealed, depending on the actual needs. In this embodiment, the sustained-release component 3 preferably adopts a split structure design, with the protrusion 311 formed on the base 31 and the liquid outlet 302 disposed on the support 32.

[0058] Optionally, the slow-release component 3 may further include a one-way valve 33, which is located at the inlet end 301 to control the one-way flow of the inlet end 301. In this embodiment, the one-way valve 33 may be installed on the top of the protrusion 311, and the protrusion 311 may provide an installation position for the one-way valve 33.

[0059] In some embodiments, the oil filter may also include a safety valve 4. In case of an emergency such as blockage of the filter assembly 2 or poor oil passing performance, which may prevent the engine from receiving sufficient oil, the unfiltered oil entering through the oil inlet of the housing 1 is directly guided to the oil outlet to supply oil to the engine.

[0060] like Figure 4 and Figure 7 As shown, the safety valve 4 includes a valve plate 41 and an elastic element 42. The valve plate 41 has a liquid outlet 411 communicating with the oil outlet, and the elastic element 42 is located between the support 32 and the valve plate 41. (Refer to reference...) Figure 2The filter assembly 2 includes a top plate 21 with a pressure relief port 211 connected to the oil inlet and outlet of the housing 1. In the first state, i.e., when the oil filter is in normal operation, the elastic element 42 pushes against the valve plate 41 to block the pressure relief port 211, allowing normal oil flow and filtration within the housing 1. In the second state, i.e., when the oil filter assembly 2 has poor oil flow performance, such as... Figure 7 As shown ( Figure 7 The arrow shown indicates the direction of oil flow in the second state. At this time, the oil pressure inside the housing 1 is high, and the oil can enter the pressure relief port 211 and push the valve plate 41 down so that the oil can flow directly to the oil outlet through the pressure relief port 211, thereby supplying oil to the engine.

[0061] Furthermore, such as Figure 5 and Figure 6 As shown, in conjunction with the reference appendix Figure 4 The support 32 in this embodiment includes a seat body 321, a cavity is disposed in the seat body 321, the seat body 321 protrudes in the direction of the top plate 21 to form a step portion 3211, the elastic member 42 is sleeved on the step portion 3211, the step portion 3211 is used to limit the elastic member 42 to prevent the elastic member 42 from being misaligned or moved.

[0062] Furthermore, the support 32 also includes a support body 322, which is located above the seat body 321 and surrounds the elastic member 42. The support body 322 is provided with a through hole for oil to flow through. The support body 322 can effectively limit the elastic member 42 to prevent the elastic member 42 from contacting the filter body 22.

[0063] Optionally, the radial dimensions of the seat 321 and the support 322 can also be adapted to the radial dimensions of the inner circumference of the filter body 22, so that it can also achieve the effect of supporting the filter body 22.

[0064] Optionally, such as Figure 3 and Figure 5 As shown, the slow-release component 3 in this embodiment also includes a sealing element 34, which is sandwiched between the base 31 and the bottom plate 23 to improve the sealing performance of the base 31 and the bottom plate 23 and prevent some of the oil from flowing out of the oil chamber 20 through the circumferential gaps between the base 31 and the bottom plate 23.

[0065] Optionally, such as Figure 5 As shown, the sustained-release component 3 also includes a first latch 35, which is disposed at the bottom of the base 31. Correspondingly, as... Figure 8 As shown, a second buckle 11 is provided on the inner bottom surface of the housing 1. In this embodiment, the base 31 and the housing 1 are connected by a buckle, which facilitates the overall disassembly and replacement of the slow-release component 3.

[0066] In addition, this embodiment also provides an engine that includes the above-mentioned oil filter. The engine has an additive replenishment function, which helps to extend the service life of the engine oil, reduce the frequency of oil changes, and reduce operating costs.

[0067] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0068] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An oil filter, characterized in that, include: The housing (1) is hollow inside and has an oil inlet and an oil outlet for oil to flow through it. A filter assembly (2) is disposed inside the housing (1). An oil outlet chamber (20) communicating with the oil outlet is formed inside the filter assembly (2). An oil inlet channel (10) communicating with the oil inlet is defined between the filter assembly (2) and the housing (1). Part of the oil flowing in through the oil inlet is filtered by the filter assembly (2) and flows into the oil outlet chamber (20), while the other part flows into the oil inlet channel (10). The slow-release component (3) is disposed in the oil outlet chamber (20). The slow-release component (3) has a receiving chamber (30) for containing additives. The receiving chamber (30) has an inlet end (301) communicating with the oil inlet channel (10) and an outlet end (302) communicating with the oil outlet chamber (20). The engine oil in the oil inlet channel (10) enters the receiving chamber (30) through the inlet end (301) and then flows into the oil outlet chamber (20) through the outlet end (302).

2. The oil filter according to claim 1, characterized in that, The filter assembly (2) includes a filter body (22) which surrounds and forms the oil outlet chamber (20); the slow-release assembly (3) can abut against the inner peripheral wall of the filter body (22) to radially support the filter body (22).

3. The oil filter according to claim 1, characterized in that, The liquid inlet (301) is positioned higher than the liquid outlet (302).

4. The oil filter according to claim 3, characterized in that, The slow-release component (3) has a protrusion (311) extending upward toward the receiving cavity (30). A connecting channel (3110) is provided in the protrusion (311). The liquid inlet (301) is located at one end of the protrusion (311) near the top wall of the receiving cavity (30). One end of the connecting channel (3110) is connected to the liquid inlet (301), and the other end is connected to the oil inlet channel (10).

5. The oil filter according to claim 4, characterized in that, The protrusion (311) is spaced apart from the inner top wall of the receiving cavity (30).

6. The oil filter according to claim 4, characterized in that, The liquid outlet (302) is located on the peripheral wall of the receiving cavity (30), and the liquid inlet (301) is located on the side of the protrusion (311) opposite to the liquid outlet (302).

7. The oil filter according to claim 1, characterized in that, The sustained-release component (3) includes: The base (31) is connected to the housing (1); The support (32) is fastened to the base (31) above it. The support (32) has a cavity with one end open. The cavity and the base (31) enclose the cavity to form the receiving cavity (30).

8. The oil filter according to claim 7, characterized in that, The oil filter also includes a safety valve (4) having a first state and a second state. The safety valve (4) includes a valve plate (41) and an elastic element (42). The valve plate (41) is provided with a liquid passage (411) communicating with the oil outlet. The elastic element (42) is located between the support (32) and the valve plate (41). The filter assembly (2) includes a top plate (21). The top plate (21) is provided with a pressure relief port (211), which is connected to the oil inlet and the oil outlet. In the first state, the elastic element (42) pushes against the valve plate (41) to block the pressure relief port (211); In the second state, the oil enters the pressure relief port (211) and pushes the valve plate (41) downward so that the oil can flow through the pressure relief port (211) to the oil outlet.

9. The oil filter according to claim 8, characterized in that, The support (32) includes a seat (321) and a support (322). The cavity is disposed on the seat (321). The seat (321) protrudes in the direction of the top plate (21) to form a stepped portion (3211). The elastic member (42) is sleeved on the stepped portion (3211). The support (322) is located above the seat (321) and surrounds the elastic member (42).

10. An engine, characterized in that, Includes the oil filter as described in any one of claims 1-9.

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