Piston oil storage type ring bank

Abstract

An oil storage type ring land (2) of a piston (1) comprises a ring land body (2) between a first gas ring groove (24) and a second gas ring groove (25) at the head of the piston (1), the ring land body (2) is provided with an oil storage structure, the oil storage structure comprises a row of first oil storage holes (51) formed in the middle of the peripheral face of the ring land body (2) at equal intervals in the radial direction, and a row of second oil storage holes (52) formed close to the second gas ring groove (25) at equal intervals in the radial direction. The first oil storage holes (51) and the second oil storage holes (52) are arranged in a staggered mode.

Description

Technical Field

[0001] This invention relates to the field of engine piston technology, specifically a piston oil reservoir ring lander and its auxiliary piston for gas flow cooling and oil flow circulation. Background Technology

[0002] In the structure of a piston, there are usually two compression ring grooves and one oil ring groove. Compression rings are fitted into the two compression ring grooves, and oil rings are fitted into the oil ring groove. Their main function is to seal and block the combustion gases while, through the reciprocating motion of the piston, distributing oil on the working surface of the cylinder wall to meet lubrication requirements.

[0003] A good piston requires good lubrication and effective sealing of combustion gases during piston movement. However, the existing pistons use a flat-mouthed compression ring structure, which causes excessive combustion gases to leak into the crankcase through the gap at the compression ring port. These leaked high-temperature, high-pressure combustion gases cause the oil in the ring land and ring groove to vaporize and deteriorate, directly affecting the lubrication performance of the piston rings.

[0004] On the other hand, with the rapid purging of the downward-moving combustion gases, the engine oil is quickly driven downwards and leaks into the crankcase. At this time, the two piston rings on the piston head, especially the first piston ring, suffer from insufficient lubrication due to a temporary lack of oil supply, leading to abnormal wear between the outer surface of the piston ring and the cylinder wall working surface. The existing ring land structure cannot adequately buffer the engine oil and quickly provide lubrication for the first and second piston rings, thus affecting the lubrication effect of the piston rings.

[0005] Against this backdrop, piston ring land with oil storage function becomes particularly important. There is an urgent need for a piston oil-storage ring land and a method based on this structure to further assist the piston in limiting, guiding, and dissipating combustion gases during rapid reciprocating motion, while simultaneously achieving oil guidance and circulation. Summary of the Invention

[0006] This invention proposes a piston-type oil storage annular lander to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A piston oil-storage ring land includes a ring land portion between a piston head ring groove 1 and a ring groove 2. The ring land is provided with an oil storage structure, which includes a row of oil storage holes 1 arranged at the same radial spacing at the middle position of the outer circumference of the ring land, and a row of oil storage holes 2 arranged at the same radial spacing near the ring groove 2. The oil storage holes 1 and the oil storage holes 2 are arranged in an alternating position.

[0009] Preferably, the first oil storage hole is circular, the second oil storage hole is arc-shaped, the depth of the first oil storage hole does not exceed the depth of the first gas ring groove, and the depth of the second oil storage hole is 30% to 50% of the depth of the second gas ring groove, and the second oil storage hole is axially connected to the second gas ring groove.

[0010] Preferably, the piston head is provided with a first gas ring groove and a second gas ring groove from top to bottom, and a first gas ring and a second gas ring are respectively fitted into the first gas ring groove and the second gas ring groove.

[0011] When the piston enters the power and exhaust strokes, the oil reservoir one and oil reservoir two provide space for the high-temperature and high-pressure gas to expand, depressurize, buffer, and dissipate heat.

[0012] When the piston enters the intake stroke, the oil reservoir one and oil reservoir two provide buffer and buffer space for the upward-moving oil, and at the same time, they are a storage structure for quickly providing oil to the piston ring one and piston ring two.

[0013] Preferably, a metering air inlet is provided on the upper side of the air ring groove, and a metering air outlet is provided on the lower side of the air ring groove, and the metering air inlet and the metering air outlet are connected to the bottom of the air ring groove.

[0014] Preferably, if the second air ring is a fully sealed air ring, a metering air inlet hole 2 must be provided on the upper side of the second air ring groove, and a metering air outlet hole 2 must be provided on the lower side of the second air ring groove, and the metering air inlet hole 2 and the metering air outlet hole 2 are connected to the bottom of the second air ring groove.

[0015] Preferably, if the second air ring uses an existing flat-mouth air ring with an externally tangential structure, the diameter of the first quantitative air outlet of the second air ring groove must be reduced, and the second quantitative air inlet and outlet do not need to be provided on the upper and lower sides of the second air ring groove.

[0016] Preferably, after the piston is installed in the cylinder, the upper part is the combustion chamber and the lower part is the crankcase. The top of the combustion chamber is provided with a valve intake surface and a valve exhaust surface arranged in relative positions. The position of the piston top circular surface perpendicular to the middle of the valve intake surface is set at 6 o'clock, and the position of the piston top circular surface perpendicular to the middle of the valve exhaust surface is set at 0 o'clock.

[0017] Preferably, the first quantitative air inlet can be located at any position from 0 to 3 o'clock or from 9 to 0 o'clock on the upper side of the air ring groove, and the first quantitative air inlet is optimally located at the position of 0, 3, or 9 o'clock on the upper side of the air ring groove. The first quantitative air outlet should be located at the position of 0 or 6 o'clock on the lower side of the air ring groove.

[0018] Preferably, an oil ring groove is provided below the second gas ring groove, and an oil ring is fitted inside the oil ring groove. The second gas ring groove and the oil ring groove are recessed ring lands. Several oil return holes are provided at the 0 o'clock and 6 o'clock positions corresponding to the bottom of the oil ring groove.

[0019] Preferably, the first gas ring is a fully sealed gas ring; the second gas ring is a fully sealed gas ring or an existing flat-mouth gas ring; the oil ring groove and the oil ring are existing structures, and the oil ring is an existing combined oil ring or an integrated oil ring.

[0020] Preferably, when the first gas ring is a single-layer double-step joint with a lower incision structure and a fully sealed ring, its structure is as follows: the two ends of the joint are a double-step joint one and a double-step joint two, which form a double double-step complementary joint. The joint is divided into two layers, and the upper and lower layers are both stepped joints. The upper and lower steps are radially staggered, and the left and right ends are double-stepped and overlapped. The ring expands and contracts between the cylinder wall and the first gas ring groove, and is a continuous fully sealed ring. The bottom inner edge of the ring body is provided with a lower incision structure. At the right-angle turn of the short tongue end of the first double-step joint, there is an inwardly concave arc hole.

[0021] Preferably, when the second gas ring is a single-layer double-step overlap with an undercut structure and a fully sealed ring, its overlap structure is the same as that of the first gas ring, a single-layer double-step overlap with an undercut structure and a fully sealed ring. The difference is that the fully sealed gas ring used in the first gas ring only has one undercut structure along the inner edge of the bottom of the ring body, while the fully sealed gas ring used in the second gas ring only has one undercut structure along the outer edge of the bottom of the ring body.

[0022] Preferably, a method for auxiliary piston-driven combustion gas cooling and oil circulation based on the aforementioned piston-oil-storage ring lander includes a circulation path where air, mixture, or combustion gas in the combustion chamber is restricted and guided to the crankcase.

[0023] S1. Downward path from the combustion chamber to the circumference:

[0024] When the quantitative air inlet is set at the 0 o'clock position and the quantitative air outlet is set at the 0 o'clock position, the quantitative air inlet, the gap between the back of the air ring and the bottom of the air ring groove, and the quantitative air outlet form a new U-shaped path for air, mixed gas or fuel gas to descend.

[0025] When the quantitative air inlet is set at the 0 o'clock position and the quantitative air outlet is set at the 6 o'clock position, the quantitative air inlet, the gap between the back of the air ring and the bottom of the air ring groove, and the quantitative air outlet form two new arc-shaped extension paths of equal length for air, mixed gas or fuel gas to descend.

[0026] When the quantitative air inlet is set at the 3 o'clock position and the quantitative air outlet is set at the 0 o'clock position, the quantitative air inlet, the gap between the back of the air ring and the bottom of the air ring groove, and the quantitative air outlet form two new arc-shaped extension paths of one long and one short for air, mixed gas or fuel gas to descend.

[0027] When the quantitative air inlet is set at the 9 o'clock position and the quantitative air outlet is set at the 0 o'clock position, the quantitative air inlet, the gap between the back of the air ring and the bottom of the air ring groove, and the quantitative air outlet form two new arc-shaped extension paths, one short and one long, for the downward flow of air, mixed gas, or fuel gas.

[0028] When the piston enters the compression, power, and exhaust strokes, part of the air, mixture, or combustion gas enters the back of the ring from the upper side gap to establish side pressure, while the other part passes through the ring groove through a new U-shaped path or a new arc-shaped extended path. At the same time, the air, mixture, or combustion gas entering the back of the ring from the upper side gap is introduced into the ring land.

[0029] S2. Downward path from the ring bank to the concave ring bank:

[0030] When the second gas ring is selected to use a fully sealed gas ring, the air, mixture or fuel gas reaching the ring bank will descend from the 6 o'clock or 0 o'clock position through the new U-shaped path 2 formed by the second metered air inlet, the back of the second gas ring and the second metered air outlet to the recessed ring bank.

[0031] When the second gas ring chooses to use the existing flat gas ring and the second gas ring groove retains the existing structure, the air, mixed gas or fuel gas reaching the ring bank will descend from the flat gas ring port at the 6 o'clock or 0 o'clock position to the recessed ring bank according to the existing path.

[0032] When the piston enters the compression, power and exhaust strokes, the air, mixture or fuel gas that reaches the ring land, part of it enters the back of the ring from the upper side gap of the second ring to establish side pressure, and the other part passes through the new U-shaped path of the second ring groove, or through the flat end of the ring, to establish the back side pressure of the second ring. At the same time, the air, mixture or fuel gas that enters the back of the ring from the upper side gap is guided into the concave ring land.

[0033] S3. Downward path from the recessed ring bank to the crankcase:

[0034] The piston has an existing structure for its oil ring groove and oil ring. The oil ring is an existing combined oil ring or an integral oil ring. The air, mixed gas, or fuel gas that enters from the concave ring land descends along the existing path. That is, part of the fuel gas enters the oil ring groove from the upper side gap of the oil ring, and the other part enters the oil ring cavity from the upper side of the scraper port or the integral oil ring port. After being blocked and turbulent by the oil ring, it leaks into the crankcase from the oil return hole.

[0035] It also includes the following:

[0036] When the piston enters the intake stroke, the engine oil is drawn upwards, from the oil return hole → oil ring cavity → oil ring scraper port or integrated oil ring port → recessed ring land → U-shaped path two or flat-mouthed gas ring port → ring land + oil storage structure → U-shaped path one or arc-shaped extended path → combustion chamber. This is the entire space and path through which the engine oil is restricted, guided, and only quantitatively buffered upwards. The ring land and its oil storage structure are one of the important spatial structures for buffering and caching the upward movement of engine oil.

[0037] When the piston enters the compression, power, and exhaust strokes, the fully sealed structure of the first piston ring, combined with the setting of a certain number of intake holes and a certain number of exhaust holes in the piston ring groove, makes the combustion chamber → U-shaped path one or arc-shaped extended path → ring land + oil storage structure → U-shaped path two or flat piston ring port → recessed ring land → scraper port on oil ring or integrated oil ring port → oil ring cavity → oil return hole, which becomes the entire space and channel through which the combustion gas is restricted and guided, and can only flow downward in a quantitative manner, expanding, depressurizing, buffering, cooling, and driving away the oil returning to the crankcase. The middle part is the ring land and its oil storage structure, including oil storage hole one and oil storage hole two, which becomes an important spatial structure for the turbulence, expansion, depressurization, cooling, and release of oil of the combustion gas, ensuring the lubrication of piston ring one and piston ring two.

[0038] The engine oil is drawn upwards for flow restriction, buffering, and caching, ensuring the space and path for lubrication. It also serves as the space and path for the gas to flow downwards for flow restriction, expansion pressure reduction, cooling, and buffering, driving the engine oil downwards for backflow.

[0039] The fully sealed structure of the first gas ring groove and the first gas ring, along with the corresponding or staggered positions of their metered inlet and outlet ports, form a new U-shaped path or a new extended arc path. Combined with the fully sealed structure of the second gas ring groove and the second gas ring, along with the corresponding positions of their metered inlet and outlet ports, a new U-shaped path is formed. Alternatively, it can be combined with the existing structure of the second gas ring groove and the existing flat-mouth gas ring with an external tangent structure. Under the synergistic effect of the existing oil ring groove structure and the existing oil ring, the combined oil ring scraper port or integrated oil ring port, along with the new U-shaped path of the second gas ring groove, or the flow-limiting and guiding effect of the existing flat-mouth gas ring port, strengthens and enhances the oil ring cavity, the recessed ring land, and the ring land's function of buffering engine oil and gas combustion. This allows the engine oil buffered in the oil ring cavity, the recessed ring land, the ring land, and the ring land oil storage structure to be evenly coated on the cylinder wall working surface by the oil ring, the second gas ring, and the first gas ring.

[0040] When the piston enters the intake stroke, due to the negative pressure in the combustion chamber, the oil moves upward in the opposite direction along the path that the air, air-fuel mixture, or fuel gas originally traveled downward. Due to the difference between the oil and air, the low-density, highly fluid air is quickly drawn into the combustion chamber through the lower side gap of the piston ring and the metered air outlet and metered air intake. The high-density, viscous oil, on the other hand, is mostly blocked below the small metered air outlet. The oil that struggles to pass through the narrow lower side gap and metered air outlet is then buffered and retained by the back gap space of the piston ring. Only a very small amount of oil can escape through the metered air intake and enter the combustion chamber.

[0041] The increased space in the oil storage structure of the annular land increases the oil buffer capacity and improves the oil collection speed. When the piston enters the power and exhaust strokes, the oil buffered at the piston head is purged and driven downwards by the restricted and guided combustion gases. The metered downward-moving combustion gases are further slowed down by the buffering and turbulence of the annular land and oil storage structure, ensuring that after the combustion gases have purged the oil, the oil stored in the annular land remains sufficient to stably supply the outer surfaces of compression rings 1 and 2 to the cylinder wall. This stable supply is crucial for ensuring the lubrication of compression rings 2 and 1 on the cylinder wall.

[0042] For piston ring 2, if a flat-mouth piston ring is used, and the oil ring is a combination oil ring or a one-piece oil ring, this is a common structure for existing pistons and is not the only one specified here. If a combination oil ring is used, it includes an upper scraper, an inner liner, and a lower oil ring scraper. The upper and lower oil ring scrapers hold the inner liner in the middle to form the oil ring cavity.

[0043] If the second compression ring is a fully sealed compression ring, or an existing flat-mouth compression ring, the circular oil distribution frame formed by the outer circumference structure on the lower side of the ring increases the oil buffer capacity and the adhesion speed of the ring to the oil. The thinning of the outer edge of the ring reduces the friction with the cylinder wall working surface. In addition, its torsional effect improves the smoothness of the piston's upward movement and the uniformity of oil distribution, and facilitates the scraping of excess oil from the cylinder wall working surface when the piston moves downward.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] The piston-type oil-storage ring land of the present invention features an oil-storage structure on the ring land, namely, several rows of oil-storage holes arranged around the ring land, achieving several functions with a simple structure:

[0046] First, a row of oil storage holes is set at the axial center of the outer perimeter of the ring at the same radial spacing. At the same time, a row of oil storage holes is set at the same radial spacing near the second gas ring groove. Through the layered oil storage hole design, a good fit is achieved with the two gas rings and the gas groove, forming a structure that is small at both ends and large in the middle. This allows for timely collection and buffering of some engine oil, preventing insufficient lubrication of the ring surface due to rapid blowing of the gas. At the same time, the second oil storage hole is connected to the second gas ring groove, which not only ensures the amount of engine oil stored and the adhesion of the ring to a larger area, which is conducive to timely dispersion and coating, but also ensures that the gas at the bottom of the ring groove is effectively isolated and does not escape too much, greatly improving the lubrication effect of the gas ring.

[0047] Secondly, the oil reservoir increases the expansion and buffer space for the downward gas flow. Its turbulence and retention slow down the downward speed of the gas flow, thereby improving the decompression and cooling effect on the piston head.

[0048] Third, the oil storage ring design facilitates uniform oil distribution, and the setting of oil storage hole one and oil storage hole two ensures a stable and rapid supply of engine oil. Attached Figure Description

[0049] Figure 1 The following is a schematic reference diagram showing the flow direction of air, air-fuel mixture or fuel gas and engine oil (downward) in the piston head when the piston of the present invention is in compression, power stroke, or exhaust stroke.

[0050] Figure 2 This is a schematic diagram of the piston structure of the present invention;

[0051] Figure 3 This invention provides a schematic diagram of a single-layer, double-step overlap with an inwardly tangential, fully sealed ring structure.

[0052] Figure 4 For the present invention ( Figure 3 A magnified front view of the fully sealed ring joint of a single-layer double-step overlap with an inwardly tangential structure;

[0053] Figure 5 For the present invention ( Figure 3 A magnified schematic diagram of the bottom of a single-layer double-step overlap with an inwardly tangential structure and a fully sealed ring overlap.

[0054] Figure 6 The second air ring of the present invention is a schematic diagram of a single-layer double-step overlap with a lower outer tangential structure and a fully sealed ring structure;

[0055] Figure 7 For the present invention ( Figure 6 A magnified front view of the fully sealed ring joint of a single-layer double-step overlap with an outer tangent structure;

[0056] Figure 8 For the present invention ( Figure 6A magnified schematic diagram of the bottom of a single-layer double-step overlap with a lower outward-cut structure and a fully sealed ring overlap.

[0057] Figure 9 The second diagram shows the existing flat-mouth gas ring structure.

[0058] Figure 10 For gas ring two Figure 9 A magnified front view of the existing flat-mouth gas ring port area;

[0059] Figure 11 For gas ring two Figure 9 A magnified schematic diagram of the bottom of the existing flat-mouth gas ring port;

[0060] Figure 12 This is a front view of the piston at point 0 of the present invention;

[0061] Figure 13 This is another perspective view of the piston of the present invention;

[0062] 1. Piston; 2. Ring land; 21. Compression ring one; 22. Compression ring two; 23. Oil ring; 24. Compression ring groove one; 25. Compression ring groove two; 26. Oil ring groove; 3. Recessed ring land; 31. Metering inlet port one; 32. Metering outlet port one; 33. Metering inlet port two; 34. Metering outlet port two; 41. Upper scraper of oil ring; 42. Lower scraper of oil ring; 43. Oil ring cavity; 44. Oil return hole; 51. Oil reservoir one; 52. Oil reservoir two; 61. Double-step joint one; 62. Double-step joint two; 63. Concave arc hole; 8. Flat-mouth compression ring; 81. Valve inlet surface; 82. Valve exhaust surface; 91. Lower inner tangent structure; 92. Lower outer tangent structure. Detailed Implementation

[0063] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0064] Reference Figures 1-13 Example 1: A piston-type oil-storage ring land includes a ring land 2 portion between the piston head ring groove 24 and the piston ring groove 25. The ring land 2 is equipped with an oil-storage structure, namely, several rows of oil-storage holes or oil-storage grooves are axially arranged around the outer circumference of the ring land 2. Taking two rows of oil-storage holes as an example, a row of oil-storage holes 51 is arranged at the same radial spacing in the middle of the outer circumference of the ring land 2, and a row of oil-storage holes 52 is arranged at the same radial spacing near the piston ring groove 25. The oil-storage holes 51 and 52 are arranged in an alternating position.

[0065] The first oil storage hole 51 of the ring 2 is circular, and the second oil storage hole 52 is arc-shaped. The depth of the first oil storage hole 51 does not exceed the depth of the first gas ring groove 24, while the depth of the second oil storage hole 52 is 30% to 50% of the depth of the second gas ring groove 25, and the second oil storage hole 52 is axially connected to the second gas ring groove 25.

[0066] The oil storage structure can also be in the form of an oil storage tank, but the oil storage structure is not limited to one form.

[0067] The piston 1 head is provided with a first gas ring groove 24 and a second gas ring groove 25 from top to bottom, and a first gas ring 21 and a second gas ring 22 are respectively fitted into the first gas ring groove 24 and the second gas ring groove 25.

[0068] When piston 1 enters the power and exhaust strokes, the oil storage hole 1 51 and oil storage hole 2 52 provide space for the high-temperature and high-pressure gas to expand, depressurize, buffer, and dissipate heat.

[0069] When piston 1 enters the intake stroke, the oil storage hole 1 51 and oil storage hole 2 52 provide buffer and buffer space for the upward oil, and at the same time, they are a storage structure for quickly providing oil to the piston ring 1 21 and piston ring 2 22.

[0070] The upper side of the air ring groove 24 is provided with a metering air inlet hole 31, and the lower side of the air ring groove 24 is provided with a metering air outlet hole 32. The metering air inlet hole 31 and the metering air outlet hole 32 are connected to the bottom of the air ring groove 24.

[0071] If the second air ring 22 is a fully sealed air ring, a metering air inlet 23 must be provided on the upper side of the second air ring groove 25, and a metering air outlet 24 must be provided on the lower side of the second air ring groove 25. The metering air inlet 233 and the metering air outlet 24 are connected to the bottom of the second air ring groove 25.

[0072] If the existing flat-mouth air ring 8 with a lower outer tangent structure is used for the second air ring 22, the diameter of the metering air outlet 32 ​​of the first air ring groove 24 must be reduced, and the metering air inlet 33 and metering air outlet 34 do not need to be set on the upper and lower sides of the second air ring groove 25.

[0073] After the piston 1 is installed in the cylinder, the upper part is the combustion chamber and the lower part is the crankcase. The top of the combustion chamber is provided with a valve intake surface 81 and a valve exhaust surface 82 arranged in relative positions. The position of the top circular surface of the piston 1 perpendicular to the middle of the valve intake surface 81 is set at 6 o'clock, and the position of the top circular surface of the piston 1 perpendicular to the middle of the valve exhaust surface 82 is set at 0 o'clock. The metering intake port 31 can be set at any position from 0 o'clock to 3 o'clock or from 9 o'clock to 0 o'clock on the upper side of the ring groove 24, but the metering intake port 31 is preferably set at the position of 0 o'clock, 3 o'clock or 9 o'clock on the upper side of the ring groove 24. The metering exhaust port 32 should be set at the position of 0 o'clock or 6 o'clock on the lower side of the ring groove 24.

[0074] Below the second gas ring groove 25, there is an oil ring groove 26, and an oil ring 23 is fitted into the oil ring groove 26. There is a recessed ring bank 3 between the second gas ring groove 25 and the oil ring groove 26. Several oil return holes 44 are provided at the 0 o'clock and 6 o'clock positions at the bottom of the oil ring groove 26.

[0075] The first gas ring 21 is a fully sealed gas ring; the second gas ring 22 is a fully sealed gas ring or an existing flat-mouth gas ring 8 with an externally tangential structure; the oil ring groove 26 and the oil ring 23 are existing structures, and the oil ring 23 is an existing combined oil ring or an integrated oil ring.

[0076] When the aforementioned gas ring 21 is a single-layer double-step joint with a lower incision structure and a fully sealed ring, its structure is as follows: the two ends of the joint are a double-step joint 61 and a double-step joint 62, which form a double double-step complementary joint. The joint is divided into two layers, with the upper and lower layers being stepped joints. The upper and lower steps are radially staggered, and the left and right ends are double-stepped and overlapped. The ring expands and contracts between the cylinder wall and the gas ring groove 24 and is a continuous fully sealed ring. A lower incision structure 91 is provided on the inner edge of the bottom of the ring body. A concave arc hole 63 is provided at the right-angle turn of the short tongue end of the double-step joint 61.

[0077] The concave arc hole 63 facilitates the milling cutter's machining of the inner right-angle portion of the double-step joint 61. Simultaneously, when the piston 1 is pressurized by combustion gases, the arc-shaped concave arc hole 63 acts to steer and turbulent the combustion gases and buffer and reduce pressure. The bottom of the piston ring 21 has a lower incisional structure 91. This structure increases the back clearance space of the piston ring 21, which helps with the expansion and decompression of the descending high-temperature, high-pressure combustion gases, buffering and caching of the ascending engine oil, and appropriately reduces the ring's elasticity. It also generates a slight torsional effect, which is beneficial for scraping excess engine oil from the cylinder wall when the piston 1 descends.

[0078] When the second gas ring 22 is a single-layer double-step overlap with an undercut structure and a fully sealed ring, its overlap structure is the same as that of the first gas ring 21, a single-layer double-step overlap with an undercut structure and a fully sealed ring. The difference is that the fully sealed gas ring used in the first gas ring 21 only has an undercut structure 91 along the inner edge of the bottom of the ring body, while the fully sealed gas ring used in the second gas ring 22 only has an undercut structure 92 along the outer edge of the bottom of the ring body.

[0079] A method for combustion gas diversion and cooling combined with engine oil diversion and circulation based on the aforementioned piston-oil-storage ring lander auxiliary piston includes a circulation path for air, mixture, or combustion gas in the combustion chamber to be restricted and diverted to the crankcase.

[0080] S1. Downward path from the combustion chamber to circumference 2:

[0081] When the quantitative air inlet 31 is set at the 0 o'clock position and the quantitative air outlet 32 ​​is set at the 0 o'clock position, the quantitative air inlet 31, the gap between the back of the air ring 21 and the bottom of the air ring groove 24, and the quantitative air outlet 32 ​​form a new U-shaped path for air, mixed gas or fuel gas to descend.

[0082] When the quantitative air inlet 31 is set at the 0 o'clock position, and the quantitative air outlet 32 ​​is staggered and set at the 6 o'clock position, the quantitative air inlet 31, the gap between the back of the air ring 21 and the bottom of the air ring groove 24, and the quantitative air outlet 32 ​​form two new equal-length arc-shaped extension paths for air, mixed gas or fuel gas to descend.

[0083] When the quantitative air inlet 31 is set at the 3 o'clock position, and the quantitative air outlet 32 ​​is set at the 0 o'clock position, the quantitative air inlet 31, the gap between the back of the air ring 21 and the bottom of the air ring groove 24, and the quantitative air outlet 32 ​​form two new arc-shaped extension paths of one long and one short for air, mixed gas or fuel gas to descend.

[0084] When the quantitative air inlet 31 is set at the 9 o'clock position, and the quantitative air outlet 32 ​​is set at the 0 o'clock position, the quantitative air inlet 31, the gap between the back of the air ring 21 and the bottom of the air ring groove 24, and the quantitative air outlet 32 ​​form two new arc-shaped extension paths, one short and one long, for the downward flow of air, mixed gas or fuel gas.

[0085] That is, when piston 1 enters the compression, power and exhaust strokes, part of the air, mixture or fuel gas enters the back of the ring from the upper side gap of the ring-21 to establish side pressure, and the other part passes through the U-shaped path of the ring groove-24 or through the arc-shaped extended path. While establishing the back side pressure of the ring-21, the air, mixture or fuel gas entering the back of the ring from the upper side gap is introduced into the ring lander 2.

[0086] S2. Downward path from shoreline 2 to concave shoreline 3:

[0087] When the second gas ring 22 uses a fully sealed gas ring, the air, mixed gas or fuel gas reaching the ring bank 2 will descend from the 6 o'clock or 0 o'clock position through a new U-shaped path 2 formed by the metered air inlet 233, the back of the second gas ring 22 and the metered air outlet 24 to the recessed ring bank 3.

[0088] When the second gas ring 22 uses the existing flat gas ring 8 and the second gas ring groove 25 retains the existing structure, the air, mixed gas or fuel gas reaching the ring bank 2 will descend from the port of the flat gas ring 8 at the 6 o'clock or 0 o'clock position to the recessed ring bank 3 according to the existing path.

[0089] When piston 1 enters the compression, power and exhaust strokes, the air, mixture or fuel gas that reaches the ring land 2, part of it enters the back of the ring from the upper side gap of the second ring 22 to establish side pressure, and the other part passes through the new U-shaped path 2 of the second ring groove 25, or through the port of the flat-mouthed ring 8. At the same time as establishing the back side pressure of the second ring 22, the air, mixture or fuel gas that enters the back of the ring from the upper side gap is guided into the recessed ring land 3.

[0090] S3. Downward path from the recessed ring 3 to the crankcase:

[0091] The piston 1 has an existing structure for its oil ring groove 26 and oil ring 23, with the oil ring 23 being either a pre-existing combined oil ring or an integral oil ring. Air, mixed gas, or fuel gas arriving from the recessed ring land 3 descends along the existing path; that is, part of the fuel gas enters the oil ring groove 26 from the upper side gap of the oil ring 23, and the other part enters the oil ring cavity 43 from the upper side of the scraper port 41 on the combined oil ring or the port of the integral oil ring. After being blocked and turbulent by the oil ring 23, it leaks into the crankcase through the oil return hole 41.

[0092] Also includes:

[0093] When piston 1 enters the intake stroke, the oil is drawn upwards, from the oil return hole 44 → oil ring cavity 43 → oil ring scraper 41 port or integrated oil ring port → recessed ring land 3 → U-shaped path two or flat-mouthed gas ring 8 port → ring land 2 + oil storage structure → U-shaped path one or arc-shaped extended path → combustion chamber. This is the entire space and path through which the oil is restricted, guided, and only quantitatively buffered upwards. The ring land 2 and its oil storage structure are one of the important spatial structures for buffering and caching the upward movement of the oil.

[0094] When piston 1 enters the compression, power, and exhaust strokes, the fully sealed structure of piston ring 21, combined with the setting of piston ring groove 24, metered intake port 31, and metered exhaust port 32, makes the combustion chamber → U-shaped path 1 or arc-shaped extended path → ring land 2 + oil storage structure → U-shaped path 2 or flat piston ring 8 port → recessed ring land 3 → oil ring scraper 41 port or integrated oil ring port → oil ring cavity 43 → oil return hole 44, which becomes the entire space and channel for the gas to be restricted and guided, and can only flow downwards in a metered manner, expanding, depressurizing, buffering, cooling, and driving the oil back to the crankcase. The middle is the ring land 2 and its oil storage structure, including oil storage hole 1 51 and oil storage hole 2 52, which becomes an important spatial structure for the gas to turbulence, expand, depressurize, cool, release oil, and ensure the lubrication of piston ring 21 and piston ring 2 22.

[0095] The oil is drawn upwards, where it is limited, buffered, and cached to ensure lubrication. It is also the space and path for the gas to flow downwards, where it is limited, expands, depressurizes, cools, and buffers, driving the oil downwards back. The oil storage structure of the ring shore 2 is not only an important spatial structure for buffering and caching the oil as it flows upwards, but also an important spatial structure for caching and slowing down the oil as it is driven downwards by the gas.

[0096] The fully sealed structure of the gas ring groove 24 and gas ring 21, along with the corresponding or staggered positions of their metering inlet and outlet holes, forms a new U-shaped path 1 or a new extended arc-shaped path. Combined with the fully sealed structure of the gas ring groove 25 and gas ring 22, and the corresponding positions of their metering inlet and outlet holes, this forms a new U-shaped path 2. Alternatively, it can be combined with the existing gas ring groove 25 structure and the existing flat-mouth gas ring 8 with an externally tangential structure. Under the synergistic effect of the existing oil ring groove 26 structure and the existing oil ring 23, a new U-shaped path 2 can be formed. The oil ring has a scraper 41 port or an integrated oil ring port, and the second gas ring groove 25 has a new U-shaped path 2, or the second gas ring 22 has the existing flat gas ring 8 port with its flow limiting and guiding functions, so that the oil ring cavity 43, the recessed ring land 3, and the ring land 2 have their functions of buffering engine oil and buffering combustion gas, and the engine oil buffered in the oil ring cavity 43, the recessed ring land 3, the ring land 2, and the ring land oil storage structure is evenly coated on the cylinder wall working surface by the oil ring 23, the second gas ring 22, and the first gas ring 21.

[0097] The increased space in the oil storage structure of the annular lander 2 increases the oil buffer capacity and improves the oil collection speed. When the piston 1 enters the power and exhaust strokes, the oil buffered at the piston head is purged and pushed downwards by the flow-limited and guided combustion gases. The metered downward-moving combustion gases are further slowed down by the buffering and turbulence of the annular lander 2 and the oil storage structure, ensuring that after the downward-moving combustion gases have purged the oil, the oil stored in the annular lander 2 is sufficient to stably supply the outer surfaces of compression rings 21 and 22 to the cylinder wall. This stable supply is crucial for ensuring the lubrication of the cylinder wall by compression rings 22 and 21.

[0098] When piston 1 enters the intake stroke, due to the negative pressure in the combustion chamber, the oil moves upward in the opposite direction along the path that the air, air-fuel mixture, or fuel gas originally traveled downward. Due to the difference between oil and air, the low-density, highly fluid air is quickly drawn into the combustion chamber through the lower side gap of the piston ring 21, the metering outlet 32, and the metering intake 31. Meanwhile, the high-density, viscous oil is mostly blocked at the bottom of the small metering outlet 32. The oil that struggles to pass through the narrow lower side gap and the metering outlet 32 ​​is then buffered and retained by the back gap space of the piston ring 21. Only a very small amount of oil can escape through the metering intake 31 and enter the combustion chamber.

[0099] If the compression ring 22 uses a flat-mouth compression ring 8 and the oil ring 23 uses a combined oil ring or an integral oil ring, this is a common structure for existing pistons and is not the only one specified here.

[0100] If a combined oil ring is used, it includes an upper scraper 41, an inner liner, and a lower scraper 42. The upper scraper 41 and the lower scraper 42 clamp the inner liner in the middle to form an oil ring cavity 43.

[0101] If an integrated oil ring is used, it consists of an outer frame and a support spring. The internal space of the outer frame and the support spring together form the oil ring cavity 43.

[0102] If the second piston ring 22 is a fully sealed piston ring, or if the existing flat-mouth piston ring 8 is used, the circular oil distribution frame formed by the outer circumferential structure 92 on the lower side of the ring body increases the oil buffer capacity, increases the area and speed of oil adhesion on the ring body, and the thinning of the outer edge of the ring reduces the friction with the cylinder wall working surface. In addition, its torsional effect improves the smoothness of piston 1's upward movement and the uniformity of oil distribution, and facilitates the scraping of excess oil from the cylinder wall working surface when piston 1 moves downward.

[0103] Example 2 is a combined example based on the structure of Example 1.

[0104] 1. When the air ring 21 adopts a single-layer double-step overlap with a lower incision structure fully sealed ring, the overlap is as follows: Figure 4 , Figure 5 As shown, the Air 22 adopts a single-layer double-step overlap with a lower outward-cut structure and a fully sealed ring. The overlap is as follows: Figure 7 , Figure 8 As shown, the installation method and requirements are as follows:

[0105] ① If the quantitative air inlet 31 is set at the 0 o'clock position and the quantitative air outlet 32 ​​is set at the 0 o'clock position, then the single-layer double-step joint of the air ring 21 with the lower inner tangent structure of the fully sealed ring joint must be aligned with the 3 o'clock or 9 o'clock position; while the joint of the single-layer double-step joint of the air ring 22 with the lower outer tangent structure of the fully sealed ring should be aligned with the 9 o'clock or 3 o'clock position.

[0106] ② If the quantitative air inlet 31 is set at the 0 o'clock position and the quantitative air outlet 32 ​​is set at the 6 o'clock position, then the single-layer double-step joint of the air ring 21 with the lower inner tangent structure of the fully sealed ring joint must be aligned with the 3 o'clock or 9 o'clock position; while the joint of the single-layer double-step joint of the air ring 22 with the lower outer tangent structure of the fully sealed ring should be aligned with the 9 o'clock or 3 o'clock position.

[0107] ③ If the quantitative air inlet 31 is set at the 3 o'clock position and the quantitative air outlet 32 ​​is set at the 0 o'clock position, then the single-layer double-step joint of the air ring 21 with the lower inner tangent structure of the fully sealed ring joint should be aligned with the 9 o'clock position; while the joint of the single-layer double-step joint of the air ring 22 with the lower outer tangent structure of the fully sealed ring should be aligned with the 3 o'clock position.

[0108] ④ If the quantitative air inlet 31 is set at the 9 o'clock position and the quantitative air outlet 32 ​​is set at the 0 o'clock position, then the single-layer double-step joint of the air ring 21 with the lower inner tangent structure of the fully sealed ring should be aligned with the 3 o'clock position; while the joint of the single-layer double-step joint of the air ring 22 with the lower outer tangent structure of the fully sealed ring should be aligned with the 9 o'clock position.

[0109] If the oil ring 23 uses an existing combined oil ring or an integrated oil ring, the port of the upper scraper 41 of the oil ring should be aligned with the left and right sides of the 0 o'clock or 6 o'clock position opposite to the direction of the second quantitative air outlet 34; the port of the lower scraper 42 of the combined oil ring should be aligned with the left and right sides of the 6 o'clock or 0 o'clock position opposite to the direction of the port of the upper scraper 41 of the oil ring.

[0110] If the oil ring 23 uses the existing integrated oil ring, the port of the oil ring 23 should be aligned with the left and right sides of the 0 o'clock or 6 o'clock position opposite to the quantitative air outlet 34.

[0111] 2. When the air ring 21 adopts a single-layer double-step overlap with a lower incision structure fully sealed ring, the overlap is as follows: Figure 4 , Figure 5 As shown, the gas 22 uses the existing flat-mouth gas ring 8, with the joint as follows: Figure 10 , Figure 11 As shown, the installation method and requirements are as follows:

[0112] ①If the metering outlet 32 ​​of the gas ring groove 24 is set at the 0 o'clock position, then the port of the flat-mouth gas ring 8 should be aligned with the 6 o'clock position.

[0113] ②If the metering outlet 32 ​​of the gas ring groove 24 is set at the 6 o'clock position, then the port of the flat-mouth gas ring 8 should be aligned with the 0 o'clock position.

[0114] If the oil ring 23 uses the existing combined oil ring, the port of the upper scraper 41 of the oil ring should be aligned with the left and right sides of the 0 o'clock or 6 o'clock position in the opposite direction to the port of the flat gas ring 8; the port of the lower scraper 42 of the combined oil ring should be aligned with the left and right sides of the 6 o'clock or 0 o'clock position in the opposite direction to the port of the upper scraper 41 of the oil ring.

[0115] If the oil ring 23 uses an existing integrated oil ring, the port of the oil ring 23 should be aligned with the left and right sides of the 0 o'clock or 6 o'clock position opposite to the port of the flat-mouth gas ring 8.

[0116] The above structure is implemented as follows:

[0117] When the piston enters the compression, power, and exhaust strokes, the combustion chamber → U-shaped path one or arc-shaped extended path → annular land + oil reservoir structure → U-shaped path two or flat-mouthed piston ring port → recessed annular land → scraper port on the oil ring or integrated oil ring port → oil ring cavity → return oil hole, becomes the entire space and channel through which the combustion gas is restricted and guided, allowing only a quantitative downward flow for expansion, decompression, buffering, and cooling, driving and pushing the engine oil back to the crankcase. The middle part, the annular land and its oil reservoir structure, including oil reservoir one and oil reservoir two, becomes an important spatial structure for turbulent combustion gas flow, expansion, decompression, cooling, and oil release, ensuring the lubrication of piston ring one and piston ring two.

[0118] When the piston enters the intake stroke, the path that the combustion gas used to drive and push the oil downwards becomes the reverse path where the oil is restricted and guided, and can only rise in a quantitative manner. The oil storage structure around the piston is an important spatial structure for the upward buffering of the oil.

[0119] A row of oil storage holes (Type 1) is arranged at equal radial intervals along the outer perimeter of the ring. Simultaneously, a row of oil storage holes (Type 2) is arranged at equal radial intervals near the second gas ring groove. Through this layered oil storage hole design, in conjunction with U-shaped path one or an extended arc path, and U-shaped path two or the flat-mouth gas ring port of gas ring two, the structure is characterized by small ends (top being quantitative air inlet hole one and quantitative air outlet hole one, bottom being U-shaped path two or the flat-mouth gas ring port of gas ring two) and a large middle section (ring + oil storage structure), resembling the structure of a water conservancy system: "river channel + sluice gate + "throughput lake + sluice gate + ...". This effectively controls the downward flow of fuel gas and promptly collects and buffers the upward flow of engine oil. The turbulence and retention of the oil storage holes slow down the downward speed of the fuel gas and facilitates uniform oil distribution. The design and depth control of oil reservoir hole one and oil reservoir hole two ensure a stable supply of engine oil, preventing insufficient lubrication of the ring surface due to temporary lack of engine oil after rapid purging by combustion gases, as is the case with existing structures. At the same time, oil reservoir hole two is connected to combustion ring groove two and the opening depth is limited, which not only ensures the buffer amount of engine oil and adhesion to a larger area of ​​the ring body, which is conducive to timely dispersion and coating, but also ensures that the combustion gases at the bottom of the ring groove are effectively isolated and do not escape too much, thus ensuring the side pressure on the back of the ring.

[0120] The U-shaped path one or arc-shaped extended path of the first gas ring groove above the gas ring lander connects to the second U-shaped path of the second gas ring groove, or the flat-mouth gas ring port of the second gas ring. This serves as both a flow-limiting and guiding structure for the downward flow of fuel gas and oil, and the upward flow of air and oil, as well as a circulating structure for the oil. Its combination with the oil-storage gas ring lander creates a highly efficient space and channel that not only limits, guides, expands, depressurizes, buffers, and cools the downward flow of fuel gas and oil, but also limits, guides, buffers, and caches the upward flow of air and oil. By adjusting the size of the metered inlet and outlet ports, especially the opening size of the metered outlet port one, the flow rate of the downward flow of fuel gas and oil, and the upward flow of air and oil can be controlled. This ensures a long-term, stable, and fixed dynamic flow of fuel gas and oil, effectively improving the lubrication of the oil and reducing wear on the piston rings and cylinder wall working surfaces.

[0121] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0122] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A piston-type oil reservoir ring land, comprising a ring land (2) portion between a first ring groove (24) and a second ring groove (25) at the head of a piston (1), characterized in that, The ring bank (2) is provided with an oil storage structure, which includes a row of oil storage holes (51) arranged at the same radial spacing in the middle of the outer periphery of the ring bank (2), and a row of oil storage holes (52) arranged at the same radial spacing near the gas ring groove (25). Each of the oil storage holes (51) and each of the oil storage holes (52) are arranged in an alternating position.

2. The piston-type oil reservoir annular lander according to claim 1, characterized in that, The first oil storage hole (51) of the ring bank (2) is circular, and the second oil storage hole (52) is arc-shaped. The depth of the first oil storage hole (51) does not exceed the depth of the first gas ring groove (24), while the depth of the second oil storage hole (52) is 30% to 50% of the depth of the second gas ring groove (25), and the second oil storage hole (52) is axially connected to the second gas ring groove (25).

3. The piston-type oil reservoir annular lander according to claim 1, characterized in that, The piston (1) head is provided with a first gas ring groove (24) and a second gas ring groove (25) from top to bottom, and the first gas ring groove (24) and the second gas ring groove (25) are respectively fitted with a first gas ring (21) and a second gas ring (22); The upper side of the air ring groove (24) is provided with a metered air inlet hole (31), and the lower side of the air ring groove (24) is provided with a metered air outlet hole (32). The metered air inlet hole (31) and the metered air outlet hole (32) are connected to the bottom of the air ring groove (24).

4. A piston-type oil reservoir annular lander according to claim 2, characterized in that, The second air ring (22) is a fully sealed air ring. Therefore, a quantitative air inlet hole (33) must be provided on the upper side of the second air ring groove (25), and a quantitative air outlet hole (34) must be provided on the lower side of the second air ring groove (25). The quantitative air inlet hole (33) and the quantitative air outlet hole (34) are connected to the bottom of the second air ring groove (25).

5. The oil-storage piston ring land according to claim 3, characterized in that, After the piston (1) is installed in the cylinder, the upper part is the combustion chamber and the lower part is the crankcase. The top of the combustion chamber is provided with a valve intake surface (81) and a valve exhaust surface (82) arranged in relative positions. The position of the top circular surface of the piston (1) perpendicular to the middle of the valve intake surface (81) is set at 6 o'clock, and the position of the top circular surface of the piston (1) perpendicular to the middle of the valve exhaust surface (82) is set at 0 o'clock. The first quantitative intake port (31) is set at any position from 0 o'clock to 3 o'clock or from 9 o'clock to 0 o'clock on the upper side of the ring groove (24), and the first quantitative intake port (31) is preferably set at the position of 0 o'clock, 3 o'clock or 9 o'clock on the upper side of the ring groove (24). The first quantitative exhaust port (32) should be set at the position of 0 o'clock or 6 o'clock on the lower side of the ring groove (24).

6. A piston-type oil reservoir annular lander according to claim 4, characterized in that, Below the second gas ring groove (25) is an oil ring groove (26), and an oil ring (23) is fitted on the oil ring groove (26). There is a recessed ring bank (3) between the second gas ring groove (25) and the oil ring groove (26). Several oil return holes (44) are provided at the 0 o'clock and 6 o'clock positions at the bottom of the oil ring groove (26).

7. A piston-type oil reservoir annular lander according to claim 5, characterized in that, The gas ring 1 (21) is a fully sealed gas ring.

8. A method for heat dissipation and oil circulation of fuel gas using an auxiliary piston based on an oil-storage ring lander as described in any one of claims 1 to 7, characterized in that, This includes the circulation path of air, air-fuel mixture, or fuel gas in the combustion chamber, which is restricted and directed to the crankcase. S1. Downward path from the combustion chamber to the circumference (2): When the quantitative air inlet (31) is set at the 0 o'clock position, and the quantitative air outlet (32) is set at the 0 o'clock position, the quantitative air inlet (31), the gap between the back of the air ring (21) and the bottom of the air ring groove (24), and the quantitative air outlet (32) form a U-shaped path for air, mixed gas or fuel gas to descend. When the quantitative air inlet (31) is set at the 0 o'clock position, and the quantitative air outlet (32) is set at the 6 o'clock position, the quantitative air inlet (31), the gap between the back of the air ring (21) and the bottom of the air ring groove (24), and the quantitative air outlet (32) form two equal-length arc-shaped extended paths for air, mixed gas or fuel gas to descend. When the quantitative air inlet (31) is set at the 3 o'clock position, and the quantitative air outlet (32) is set at the 0 o'clock position, the quantitative air inlet (31), the gap between the back of the air ring (21) and the bottom of the air ring groove (24), and the quantitative air outlet (32) form two arc-shaped extension paths of one long and one short for air, mixed gas or fuel gas to descend. When the quantitative air inlet (31) is set at the 9 o'clock position, and the quantitative air outlet (32) is set at the 0 o'clock position, the quantitative air inlet (31), the gap between the back of the air ring (21) and the bottom of the air ring groove (24), and the quantitative air outlet (32) form two arc-shaped extended paths, one short and one long, for air, mixed gas or fuel gas to descend. When the piston (1) enters the compression, power and exhaust strokes, part of the air, mixture or gas enters the back of the ring from the upper side gap of the first ring (21) to establish side pressure, and the other part passes through the U-shaped path of the first ring groove (24) or through the arc-shaped extended path. At the same time, the air, mixture or gas entering the back of the ring from the upper side gap is introduced into the ring land (2). S2. Downward path from the ring bank (2) to the concave ring bank (3): When the second gas ring (22) is selected to use a fully sealed gas ring, the air, mixed gas or fuel gas reaching the ring bank (2) will descend from the 6 o'clock or 0 o'clock position through the U-shaped path formed by the second metered air inlet (33), the back of the second gas ring (22) and the second metered air outlet (34) to the recessed ring bank (3). When the second gas ring (22) chooses to use the existing flat gas ring (8) and the second gas ring groove (25) retains the existing structure, the air, mixed gas or fuel gas reaching the ring bank (2) will descend from the port of the flat gas ring (8) at the 6 o'clock or 0 o'clock position to the recessed ring bank (3) according to the existing path. When the piston (1) enters the compression, power and exhaust strokes, the air, mixture or gas that reaches the ring land (2) enters the back of the ring from the upper side gap of the second ring (22) to establish side pressure, and the other part passes through the U-shaped path of the second ring groove (25) or through the port of the flat ring (8) to establish the back side pressure of the second ring (22). At the same time, the air, mixture or gas that enters the back of the ring from the upper side gap is introduced into the recessed ring land (3). S3. Downward path from the recessed ring (3) to the crankcase: The piston (1) has an existing structure for its oil ring groove (26) and oil ring (23). The oil ring (23) is an existing combined oil ring or an integral oil ring. The air, mixed gas or fuel gas that arrives from the recessed ring land (3) goes down along the existing path. That is, part of the fuel gas enters the oil ring groove (26) from the upper side gap of the oil ring (23), and the other part enters the oil ring cavity (43) from the upper side of the scraper (41) port of the oil ring or the port of the integral oil ring. After being blocked and turbulent by the oil ring (23), it leaks into the crankcase from the oil return hole (44).

9. The auxiliary gas flow cooling and oil flow circulation method based on piston oil storage ring lander according to claim 8, characterized in that, It also includes the following: When the piston (1) enters the intake stroke, the oil is drawn upward and flows from the oil return hole (44) → oil ring cavity (43) → oil ring scraper (41) port or integrated oil ring port → recessed ring land (3) → U-shaped path two or flat-mouth gas ring (8) port → ring land (2) + oil storage structure → U-shaped path one or arc extended path → combustion chamber. This becomes the entire space and path through which the oil is restricted, guided, and can only be quantitatively buffered upward. The ring land (2) and its oil storage structure are one of the important spatial structures for the upward buffering of the oil. When the piston (1) enters the compression, power and exhaust strokes, the fully sealed structure of the first gas ring (21), combined with the setting of the first gas ring groove (24) and the first quantitative air inlet (31) and the first quantitative air outlet (32), makes the combustion chamber → U-shaped path one or arc extended path → ring land (2) + oil storage structure → U-shaped path two or flat gas ring (8) port → recessed ring land (3) → oil ring scraper (41) port or integrated oil ring port → oil ring cavity (43) → oil return hole (44) become the entire space and channel for the gas to be restricted and guided, and can only flow downward in a quantitative manner, expanding, depressurizing, buffering and cooling, driving and pushing the oil back to the crankcase. The middle is the ring land (2) and its oil storage structure, including the first oil storage hole (51) and the second oil storage hole (52), which become an important space structure for the gas to turbulence, expand, depressurize, cool, release oil, and ensure the lubrication of the first gas ring (21) and the second gas ring (22).

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