Gas ring structure and internal combustion engine with same

Abstract

The gas ring structure is suitable for the internal combustion engine, the internal combustion engine comprises a piston structure and a combustion chamber, the piston structure is provided with a gas ring groove, the piston structure is movably arranged at an oil inlet of the combustion chamber, the gas ring groove is communicated with the oil inlet, and the gas ring structure comprises a gas ring body. The gas ring body is movably arranged on the piston structure in a sleeving manner, and at least part of the gas ring body is arranged in the gas ring groove; wherein the gas ring body is provided with an oil storage cavity and an oil inlet opening, the oil inlet opening is communicated with the oil storage cavity, and the oil inlet opening is arranged towards one side far away from the combustion chamber. When the piston structure moves, one part of a combustion medium is driven to bypass the gas ring body through the gas ring groove to enter the combustion chamber, and the other part of the combustion medium enters the oil storage cavity through the oil inlet opening, so that the combustion medium entering the combustion chamber is reduced; therefore, the problem of excessive engine oil entering the combustion chamber through the piston ring in the internal combustion engine in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of internal combustion engines, and in particular to an air ring structure and an internal combustion engine having the same. Background Art

[0002] Hydrogen internal combustion engines use hydrogen as fuel, and hydrogen is active and easily ignited. In the prior art, when the internal combustion engine is working, the oil enters the combustion chamber through the piston ring and becomes a hot spot for igniting hydrogen.

[0003] However, due to excessive oil entering the combustion chamber through the piston ring, the oil, which acts as a hot spot, will randomly ignite the hydrogen in the combustion chamber, causing abnormal combustion of hydrogen in the internal combustion engine cylinder, thereby causing the performance of the entire machine to deteriorate. Utility Model Content

[0004] The main purpose of the utility model is to provide an air ring structure and an internal combustion engine having the same, so as to solve the problem of excessive engine oil entering into the combustion chamber through the piston ring in the internal combustion engine in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, there is provided an air ring structure, which is suitable for an internal combustion engine. The internal combustion engine includes a piston structure and a combustion chamber. The piston structure has an air ring groove. The piston structure can be movably arranged at the oil inlet of the combustion chamber. The air ring groove is connected with the oil inlet. The air ring structure includes: an air ring body, which can be movably mounted on the piston structure, and at least part of the air ring body is arranged in the air ring groove; wherein, an oil storage cavity and an oil inlet opening are arranged on the air ring body, and the oil inlet opening is connected with the oil storage cavity. The oil inlet opening is arranged toward a side away from the combustion chamber, so that when the piston structure moves, a part of the combustion medium is driven to bypass the air ring body through the air ring groove and enter the combustion chamber, and another part of the combustion medium enters the oil storage cavity through the oil inlet opening.

[0006] Furthermore, along the direction in which the combustion medium enters the oil inlet opening, the flow cross section of the oil storage chamber gradually increases; or along the direction in which the combustion medium enters the oil inlet opening, the flow cross section of the oil storage chamber remains unchanged.

[0007] Furthermore, the gas ring body includes: an insertion section and a blocking section connected to each other, the insertion section is arranged in the gas ring groove, and the oil storage cavity is arranged on the blocking section to block the combustion medium through the blocking section and introduce the combustion medium into the gas ring groove through the insertion section.

[0008] Furthermore, the end wall of the insertion section away from the blocking section is an inner wall of the gas ring; wherein the outer surface of the inner wall of the gas ring is a partial surface of the sphere to guide the combustion medium.

[0009] Furthermore, the internal combustion engine also includes a cylinder liner, which is arranged on the outside of the air ring structure, and a combustion medium channel is provided between the inner wall of the cylinder liner and the outer wall of the piston structure; wherein the blocking section is arranged in the combustion medium channel, and the direction of the oil inlet opening is opposite to the combustion medium flow direction of the combustion medium channel, so that a part of the combustion medium entering from the combustion medium channel enters the oil storage chamber through the oil inlet opening.

[0010] Furthermore, the end wall of the blocking section away from the insertion section is an outer wall of the gas ring; wherein the outer surface of the outer wall of the gas ring is a plane so as to fit with the inner wall of the cylinder liner.

[0011] Furthermore, the inner diameter of the cylinder liner is D1, the outer diameter of the gas ring body is D2, and D2>D1; wherein a first opening is provided on the gas ring body, and under the action of tension at opposite ends of the first opening, the outer wall of the gas ring fits with the inner wall of the cylinder liner.

[0012] Furthermore, the air ring groove has a first side wall, a second side wall and a third side wall which are connected to each other, the first side wall and the third side wall are arranged opposite to each other, the distance between the second side wall and the inner wall of the cylinder liner is S1, and the maximum width dimension of the air ring body in the radial direction is S2, S1>S2, so that an oil gap is formed between the insertion section and the inner wall of the air ring groove.

[0013] Furthermore, the air ring groove has a first side wall, a second side wall and a third side wall which are connected to each other, the first side wall and the third side wall are arranged opposite to each other, the distance between the first side wall and the third side wall is L1, the maximum thickness dimension of the air ring body along the axial direction is L2, L1>L2; wherein, along the direction in which the combustion medium enters the oil inlet opening, the piston structure reciprocates, so that when the first air ring side wall of the air ring body is in contact with the first side wall, at least part of the combustion medium enters the air ring groove; and when the second air ring side wall of the air ring body is in contact with the third side wall, the combustion medium in the air ring groove enters the combustion chamber.

[0014] According to another aspect of the utility model, an internal combustion engine is provided, including a piston structure, a combustion chamber and a cylinder liner. The internal combustion engine also includes: the above-mentioned gas ring structure, the gas ring body of the gas ring structure is sleeved on the piston structure, and the cylinder liner is sleeved on the outside of the gas ring body; hydrogen is arranged in the combustion chamber.

[0015] The utility model uses the technical solution of the utility model, and provides an air ring structure, which is suitable for an internal combustion engine. The internal combustion engine includes a piston structure and a combustion chamber, the piston structure has an air ring groove, the piston structure can be movably arranged at the oil inlet of the combustion chamber, the air ring groove is connected with the oil inlet, the air ring structure includes an air ring body, the air ring body can be movably sleeved on the piston structure, and at least part of the air ring body is arranged in the air ring groove; wherein, an oil storage cavity and an oil inlet opening are arranged on the air ring body, the oil inlet opening is connected with the oil storage cavity, and the oil inlet opening is arranged toward a side away from the combustion chamber. By arranging the air ring body, when the piston structure moves, a part of the combustion medium is driven to bypass the air ring body through the air ring groove and enter the combustion chamber, and another part of the combustion medium enters the oil storage cavity through the oil inlet opening, thereby reducing the combustion medium entering the combustion chamber, preventing abnormal combustion of hydrogen in the internal combustion engine, and thus solving the problem of excessive oil entering the combustion chamber through the piston ring in the internal combustion engine in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 A first structural schematic diagram of an embodiment of an internal combustion engine according to the utility model is shown;

[0018] Figure 2 A schematic structural diagram of a first viewing angle of an embodiment of an air ring structure according to the utility model is shown;

[0019] Figure 3 A second perspective structural schematic diagram of an embodiment of the air ring structure according to the utility model is shown;

[0020] Figure 4 A second structural schematic diagram of an embodiment of the gas ring structure according to the utility model is shown;

[0021] Figure 5 A third structural schematic diagram of an embodiment of the gas ring structure according to the utility model is shown.

[0022] The above drawings include the following reference numerals:

[0023] 1. Piston structure; 11. Air ring groove; 111. First side wall; 112. Second side wall; 113. Third side wall; 2. Combustion chamber; 21. Oil inlet; 3. Air ring body; 31. Oil storage cavity; 32. Oil inlet opening; 33. Insertion section; 34. Blocking section; 35. Air ring inner wall; 36. Air ring outer wall; 37. First air ring side wall; 38. Second air ring side wall; 39. First opening; 4. Cylinder liner; 5. Combustion medium channel; 6. Oil-passing gap. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] Please refer to Figures 1 to 5 The utility model provides an air ring structure suitable for an internal combustion engine. The internal combustion engine includes a piston structure 1 and a combustion chamber 2. The piston structure 1 has an air ring groove 11. The piston structure 1 can be movably arranged at an oil inlet 21 of the combustion chamber 2. The air ring groove 11 is connected to the oil inlet 21. The air ring structure includes an air ring body 3. The air ring body 3 can be movably mounted on the piston structure 1. At least a part of the air ring body 3 is arranged in the air ring groove 11.

[0026] Among them, an oil storage chamber 31 and an oil inlet opening 32 are provided on the gas ring body 3. The oil inlet opening 32 is connected to the oil storage chamber 31. The oil inlet opening 32 is arranged toward the side away from the combustion chamber 2, so that when the piston structure 1 moves, a part of the combustion medium is driven to bypass the gas ring body 3 through the gas ring groove 11 and enter the combustion chamber 2, and another part of the combustion medium enters the oil storage chamber 31 through the oil inlet opening 32.

[0027] The utility model provides an air ring structure, which is suitable for an internal combustion engine. The internal combustion engine comprises a piston structure 1 and a combustion chamber 2. The air ring structure comprises an air ring body 3. The air ring body 3 is arranged so that when the piston structure 1 moves, a part of the combustion medium is driven to bypass the air ring body 3 through the air ring groove 11 and enter the combustion chamber 2, and another part of the combustion medium enters the oil storage cavity 31 through the oil inlet opening 32, thereby reducing the combustion medium entering the combustion chamber 2, preventing abnormal combustion of hydrogen in the internal combustion engine, and further solving the problem of excessive engine oil entering the combustion chamber through the piston ring in the internal combustion engine in the prior art.

[0028] Specifically, the oil inlet opening 32 is arranged on one end of the air ring body 3 away from the air ring groove 11. During the movement of the piston structure 1, the oil inlet opening 32 does not contact the side wall of the air ring groove 11 to prevent the side wall of the air ring groove 11 from blocking the oil inlet opening 32, thereby preventing the combustion medium from accumulating in the oil storage chamber 31; the specific structure of the oil storage chamber 31 is an inner cavity of any shape, so that part of the combustion medium enters the oil storage chamber 31 through the oil inlet opening 32.

[0029] Optionally, the specific implementation structure of the oil storage chamber 31 is:

[0030] The first specific implementation structure: Figure 3 As shown, along the direction in which the combustion medium enters the oil inlet opening 32, the flow cross-section of the oil storage chamber 31 gradually increases, so that the cross-sectional shape of the oil storage chamber 31 along the axial direction of the gas ring body 3 is an inverted trapezoid. This arrangement allows the side walls of the oil storage chamber 31 to play a guiding role, so that the combustion medium entering the oil storage chamber 31 can easily flow out under the guiding effect of the side walls, thereby preventing the combustion medium from accumulating in the oil storage chamber 31.

[0031] The second specific implementation structure: along the direction in which the combustion medium enters the oil inlet opening 32, the flow cross-section of the oil storage chamber 31 remains unchanged, so that the cross-sectional shape of the oil storage chamber 31 along the axial direction of the air ring body 3 is a rectangle. This arrangement makes it easy for the combustion medium entering the oil storage chamber 31 to flow out under the action of gravity, preventing the combustion medium from hanging on the side wall of the oil storage chamber 31.

[0032] Furthermore, if Figure 1 In order to guide the combustion medium so that the combustion medium enters the combustion chamber 2 through the air ring groove 11, the air ring body 3 includes an insertion section 33 and a blocking section 34 that are connected to each other. The insertion section 33 is arranged in the air ring groove 11, and the oil storage cavity 31 is arranged on the blocking section 34 to block the combustion medium through the blocking section 34 and introduce the combustion medium into the air ring groove 11 through the insertion section 33.

[0033] Generally, the end wall of the insertion section 33 away from the blocking section 34 is the air ring inner wall 35; wherein the outer surface of the air ring inner wall 35 is a partial surface of a sphere to guide the combustion medium. By setting the outer surface of the air ring inner wall 35 to an arc-shaped surface, the combustion medium is guided to prevent the combustion medium from being retained on the air ring inner wall 35, thereby preventing the combustion medium from accumulating between the air ring inner wall 35 and the inner wall of the air ring groove 11.

[0034] In addition, the internal combustion engine further comprises a cylinder liner 4, which is sleeved on the outer side of the gas ring structure, and a combustion medium channel 5 is provided between the inner wall of the cylinder liner 4 and the outer wall of the piston structure 1. Figure 1 As shown, the gas ring structure is arranged between the cylinder liner 4 and the piston structure 1, and a combustion medium channel 5 is provided between the cylinder liner 4 and the piston structure 1 for the combustion medium to pass through.

[0035] Among them, the blocking section 34 is arranged in the combustion medium channel 5, and the oil inlet opening 32 is arranged opposite to the combustion medium channel 5 so that the oil storage cavity 31 is connected with the combustion medium channel 5; the direction of the oil inlet opening 32 is opposite to the flow direction of the combustion medium in the combustion medium channel 5, so that a part of the combustion medium entering from the combustion medium channel 5 enters the oil storage cavity 31 through the oil inlet opening 32, thereby reducing the combustion medium entering the air ring groove 11, and further reducing the combustion medium entering the combustion chamber 2.

[0036] Generally, the end wall of the blocking section 34 away from the insertion section 33 is the gas ring outer wall 36; wherein, the outer surface of the gas ring outer wall 36 is a plane so as to fit with the inner wall of the cylinder liner 4. By setting the outer surface of the gas ring outer wall 36 to a plane so as to fit with the inner wall of the cylinder liner 4, a gap is prevented from being generated between the gas ring outer wall 36 and the cylinder liner 4 during the movement of the piston structure 1, thereby preventing the combustion medium from entering the combustion chamber 2 through the gap between the gas ring outer wall 36 and the cylinder liner 4.

[0037] Furthermore, in order to make the air ring outer wall 36 fit tightly with the inner wall of the cylinder liner 4, the inner diameter of the cylinder liner 4 is D1, and the outer diameter of the air ring body 3 is D2, D2>D1, so that the air ring body 3 and the cylinder liner 4 are interference fit, so as to prevent the generation of a gap between the air ring outer wall 36 and the cylinder liner 4 during the movement of the piston structure 1.

[0038] Among them, in order to facilitate the cylinder sleeve 4 to be sleeved on the outer side of the gas ring body 3, a first opening 39 is provided on the gas ring body 3, so that when the cylinder sleeve 4 is installed on the outer side of the gas ring body 3, the distance between the opposite ends of the first opening 39 is shortened by the extrusion force, thereby reducing the outer diameter of the gas ring body 3, so as to facilitate the cylinder sleeve 4 to be sleeved on the outer side of the gas ring body 3; when the cylinder sleeve 4 is sleeved on the outer side of the gas ring body 3, under the tension effect of the opposite ends of the first opening 39 and the rebound effect of the gas ring body 3, the gas ring outer wall 36 is closely fitted with the inner wall of the cylinder sleeve 4, thereby preventing the generation of a gap between the gas ring outer wall 36 and the cylinder sleeve 4 in the process of the piston structure 1 moving and driving the gas ring body 3 to move.

[0039] Specifically, Figure 4 and Figure 5 As shown, the air ring groove 11 has a first side wall 111, a second side wall 112 and a third side wall 113 that are interconnected. The first side wall 111 and the third side wall 113 are arranged opposite to each other. The distance between the second side wall 112 and the inner wall of the cylinder liner 4 is S1. The maximum radial width dimension of the air ring body 3 is S2, and S1>S2, so that an oil gap 6 is formed between the insertion section 33 and the inner wall of the air ring groove 11, so that at least part of the combustion medium passes through the combustion medium channel 5 under the guidance of the air ring body 3 and passes through the oil gap 6 into the combustion chamber 2 for combustion.

[0040] Furthermore, the air ring groove 11 has a first side wall 111, a second side wall 112 and a third side wall 113 which are connected to each other. The first side wall 111 and the third side wall 113 are arranged opposite to each other. The distance between the first side wall 111 and the third side wall 113 is L1. The maximum thickness dimension of the air ring body 3 along the axial direction is L2. L1>L2, so that the air ring body 3 can be movably arranged in the air ring groove 11 along the axial direction of the air ring body 3, so that when the first air ring side wall 37 is in contact with the first side wall 111, a first oil passage is formed between the second air ring side wall 38 and the third side wall 113, and the first oil passage is connected to the combustion medium channel 5; when the second air ring side wall 38 is in contact with the third side wall 113, a second oil passage is formed between the first air ring side wall 37 and the first side wall 111, and the second oil passage is connected to the oil inlet 21 of the combustion chamber 2.

[0041] The piston structure 1 performs reciprocating motion along the direction in which the combustion medium enters the oil inlet opening 32. Figure 4 As shown, when the first gas ring side wall 37 of the gas ring body 3 is in contact with the first side wall 111, at least part of the combustion medium enters the gas ring groove 11; Figure 5 As shown, when the second gas ring side wall 38 of the gas ring body 3 is in contact with the third side wall 113 , the combustion medium in the gas ring groove 11 enters the combustion chamber 2 .

[0042] The utility model also provides an internal combustion engine, which includes a piston structure 1, a combustion chamber 2 and a cylinder liner 4. The internal combustion engine also includes the above-mentioned gas ring structure, wherein the gas ring body 3 of the gas ring structure is sleeved on the piston structure 1, and the cylinder liner 4 is sleeved on the outer side of the gas ring body 3.

[0043] Preferably, hydrogen is provided in the combustion chamber 2 in the embodiment of the present application, and the combustion medium of the internal combustion engine is engine oil.

[0044] Specifically, the movement process of the combustion medium in the internal combustion engine in the embodiment of the present application is:

[0045] S1: Figure 4 As shown, the piston structure 1 moves in the first direction, driving the gas ring body 3 to move in the first direction, so that the first gas ring side wall 37 fits with the first side wall 111, and a first oil passage is formed between the second gas ring side wall 38 and the third side wall 113. At this time, the combustion medium enters the combustion medium passage 5 along the second direction;

[0046] S3: a portion of the combustion medium enters the oil storage chamber 31 through the oil inlet opening 32; another portion of the combustion medium enters the oil passing gap 6 of the gas ring groove 11 through the first oil passing channel;

[0047] S5: Figure 5As shown, the piston structure 1 moves in the second direction, driving the gas ring body 3 to move in the second direction, so that the second gas ring side wall 38 fits with the third side wall 113, and a second oil passage is formed between the first gas ring side wall 37 and the first side wall 111;

[0048] S7: The combustion medium in the oil storage cavity 31 flows back to the combustion medium channel 5 through the oil inlet opening 32 along the first direction; the combustion medium in the oil-passing gap 6 enters the combustion chamber 2 through the second oil-passing channel for combustion.

[0049] The first direction is opposite to the second direction.

[0050] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0051] The utility model provides an air ring structure, which is suitable for an internal combustion engine. The internal combustion engine comprises a piston structure 1 and a combustion chamber 2. The piston structure 1 has an air ring groove 11. The piston structure 1 can be movably arranged at an oil inlet 21 of the combustion chamber 2. The air ring groove 11 is connected with the oil inlet 21. The air ring structure comprises an air ring body 3. The air ring body 3 can be movably sleeved on the piston structure 1. At least part of the air ring body 3 is arranged in the air ring groove 11. The air ring body 3 is provided with an oil storage cavity 31 and an oil inlet opening 32. The oil inlet opening 32 is connected with the oil storage cavity 31. The oil inlet opening 32 is arranged toward a side away from the combustion chamber 2. By setting the gas ring body 3, when the piston structure 1 moves, a part of the combustion medium is driven to bypass the gas ring body 3 through the gas ring groove 11 and enter the combustion chamber 2, and another part of the combustion medium enters the oil storage cavity 31 through the oil inlet opening 32, thereby reducing the combustion medium entering the combustion chamber 2, preventing abnormal combustion of hydrogen in the internal combustion engine, and thus solving the problem of excessive oil entering the combustion chamber through the piston ring in the internal combustion engine in the prior art. The structure is simple, easy to produce and process, and reduces production costs.

[0052] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An air ring structure, suitable for an internal combustion engine, the internal combustion engine comprising a piston structure (1) and a combustion chamber (2), the piston structure (1) having an air ring groove (11), the piston structure (1) being movably arranged at an oil inlet (21) of the combustion chamber (2), the air ring groove (11) being in communication with the oil inlet (21), characterized in that: The air ring structure comprises: An air ring body (3), the air ring body (3) being movably sleeved on the piston structure (1), and at least a portion of the air ring body (3) being disposed in the air ring groove (11); The gas ring body (3) is provided with an oil storage cavity (31) and an oil inlet opening (32), the oil inlet opening (32) being connected to the oil storage cavity (31), and the oil inlet opening (32) being arranged toward a side away from the combustion chamber (2), so that when the piston structure (1) moves, a part of the combustion medium is driven to pass through the gas ring groove (11) and bypass the gas ring body (3) to enter the combustion chamber (2), and another part of the combustion medium is driven to enter the oil storage cavity (31) through the oil inlet opening (32).

2. The gas ring structure according to claim 1, characterized in that: Along the direction in which the combustion medium enters the oil inlet opening (32), the flow cross section of the oil storage chamber (31) gradually increases; or Along the direction in which the combustion medium enters the oil inlet opening (32), the flow cross section of the oil storage chamber (31) remains unchanged.

3. The gas ring structure according to claim 1, characterized in that: The gas ring body (3) comprises: An insertion section (33) and a blocking section (34) are connected to each other, wherein the insertion section (33) is arranged in the gas ring groove (11), and the oil storage chamber (31) is arranged on the blocking section (34) so ​​as to block the combustion medium through the blocking section (34) and guide the combustion medium into the gas ring groove (11) through the insertion section (33).

4. The gas ring structure according to claim 3, characterized in that: The end wall of the insertion section (33) away from the blocking section (34) is an inner wall of the gas ring (35); The outer surface of the gas ring inner wall (35) is a partial surface of a sphere, so as to guide the combustion medium.

5. The gas ring structure according to claim 3, characterized in that: The internal combustion engine further comprises a cylinder liner (4), wherein the cylinder liner (4) is sleeved on the outer side of the gas ring structure, and a combustion medium channel (5) is provided between the inner wall of the cylinder liner (4) and the outer wall of the piston structure (1); The blocking section (34) is arranged in the combustion medium channel (5), and the direction of the oil inlet opening (32) is opposite to the combustion medium flow direction of the combustion medium channel (5), so that a part of the combustion medium entering from the combustion medium channel (5) enters the oil storage chamber (31) through the oil inlet opening (32).

6. The gas ring structure according to claim 5, characterized in that: The end wall of the blocking section (34) away from the insertion section (33) is an air ring outer wall (36); The outer surface of the air ring outer wall (36) is a plane so as to fit with the inner wall of the cylinder liner (4).

7. The gas ring structure according to claim 6, characterized in that: The inner diameter of the cylinder sleeve (4) is D1, the outer diameter of the gas ring body (3) is D2, and D2>D1; The gas ring body (3) is provided with a first opening (39), and under the action of tension at opposite ends of the first opening (39), the outer wall (36) of the gas ring is fitted with the inner wall of the cylinder sleeve (4).

8. The gas ring structure according to claim 5, characterized in that: The gas ring groove (11) comprises a first side wall (111), a second side wall (112) and a third side wall (113) which are connected to each other. The first side wall (111) and the third side wall (113) are arranged opposite to each other. The distance between the second side wall (112) and the inner wall of the cylinder liner (4) is S1. The maximum radial width of the gas ring body (3) is S2, and S1>S2, so that an oil gap (6) is formed between the insertion section (33) and the inner wall of the gas ring groove (11).

9. The gas ring structure according to claim 1, characterized in that: The air ring groove (11) comprises a first side wall (111), a second side wall (112) and a third side wall (113) which are connected to each other, the first side wall (111) and the third side wall (113) are arranged opposite to each other, the distance between the first side wall (111) and the third side wall (113) is L1, and the maximum thickness dimension of the air ring body (3) along the axial direction is L2, L1>L2; The piston structure (1) reciprocates along the direction in which the combustion medium enters the oil inlet opening (32), so that when the first air ring side wall (37) of the air ring body (3) is in contact with the first side wall (111), at least part of the combustion medium enters the air ring groove (11); and when the second air ring side wall (38) of the air ring body (3) is in contact with the third side wall (113), the combustion medium in the air ring groove (11) enters the combustion chamber (2).

10. An internal combustion engine, comprising a piston structure (1), a combustion chamber (2) and a cylinder liner (4), characterized in that: The internal combustion engine further comprises: The gas ring structure according to any one of claims 1 to 8, wherein the gas ring body (3) of the gas ring structure is sleeved on the piston structure (1), and the cylinder liner (4) is sleeved on the outer side of the gas ring body (3); hydrogen is arranged in the combustion chamber (2).

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