Internal combustion engine piston and internal combustion engine

Abstract

The internal combustion engine piston comprises a piston body, an oil ring groove and a Tesla valve, the oil ring groove is formed in the outer wall of the piston body in a concave mode and used for installing an oil ring, and a plurality of oil return holes are formed in the oil ring groove; the Tesla valve is arranged on the outer wall of the piston body and located below the oil ring groove, the conduction direction of the Tesla valve points to the top of the piston from the lower end of the piston body, one end of the Tesla valve is communicated with the oil ring groove, and the other end of the Tesla valve extends to the lower end of the piston body. The piston of the internal combustion engine is provided with the Tesla valve, when the piston moves downwards, the Tesla valve is triggered to conduct the speed increasing characteristic in the forward direction, the flow speed of lubricating oil is increased, the lubricating oil flows into an oil return hole faster, and return oil is improved; when the piston moves upwards, the Tesla valve is triggered to have the reverse conduction blocking characteristic, the flow speed of the lubricating oil is reduced, and the lubricating oil is better reserved in the channel, so that the lubricating oil is evenly spread and attached to the inner wall of the cylinder barrel, and early-stage preparation is provided for next-time lubricating oil film establishment.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile equipment, in particular to an internal combustion engine piston and an internal combustion engine. Background Art

[0002] The piston is an essential component of an internal combustion engine. Because it moves at high speeds within the cylinder, a sliding clearance is designed between the piston and the cylinder wall. The oil film generated within this extremely small gap provides support and lubrication during movement. The wide operating range of engine speeds, poor lubrication conditions, high temperatures, gradual degradation of lubricant performance, and contamination can lead to increased friction and, in extreme cases, even piston-cylinder adhesion, ultimately causing mechanical damage and destruction.

[0003] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0004] The purpose of the utility model is to provide an improved internal combustion engine piston for solving the lubrication problem.

[0005] In order to achieve the above-mentioned purpose, a specific embodiment of the present utility model provides an internal combustion engine piston, including a piston body, an oil ring groove and a Tesla valve, wherein the oil ring groove is recessed on the outer wall of the piston body and is used to install an oil ring, and a plurality of oil return holes are opened in the oil ring groove; the Tesla valve is arranged on the outer wall of the piston body and is located below the oil ring groove, and the conduction direction of the Tesla valve is from the lower end of the piston body to the top of the piston, one end of the Tesla valve is connected to the oil ring groove, and the other end extends to the lower end of the piston body.

[0006] In one or more embodiments of the present invention, a plurality of Tesla valves are provided on the outer wall of the piston body.

[0007] In one or more embodiments of the present invention, a mounting hole for mounting a piston pin is provided on the piston body, and a plurality of Tesla valves are distributed on both sides of the mounting hole and are close to the mounting hole.

[0008] In one or more embodiments of the present invention, each of the Tesla valves is connected to one of the oil return holes.

[0009] In one or more embodiments of the present invention, each Tesla valve includes a main channel and a plurality of flow channel units connected to the main channel.

[0010] In one or more embodiments of the present invention, the flow channel units are sequentially arranged on both sides of the main flow channel.

[0011] In one or more embodiments of the present invention, the flow channel width of the flow channel unit is smaller than the width of the main flow channel.

[0012] In one or more embodiments of the present invention, the oil ring groove is arranged between the gas ring groove and the Tesla valve.

[0013] In one or more embodiments of the present invention, the piston body has a flat or non-flat top surface.

[0014] The utility model also provides an internal combustion engine, comprising the internal combustion engine piston as described above.

[0015] Compared with the prior art, the internal combustion engine piston of the present invention is provided with a Tesla valve. When the piston moves downward, the lubricating oil moves upward, triggering the forward conduction speed-increasing characteristic of the Tesla valve, increasing the flow rate of the lubricating oil, and flowing into the oil return hole faster, thereby improving the return oil; and when the piston moves upward, the lubricating oil moves downward, triggering the reverse conduction blocking characteristic of the Tesla valve, reducing the flow rate of the lubricating oil, and allowing the lubricating oil to remain better in the channel, so that the lubricating oil is evenly spread on the inner wall of the cylinder, providing preliminary preparation for the establishment of the lubricating oil film next time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic diagram of a piston of an internal combustion engine in one embodiment of the present utility model;

[0018] Figure 2 This is a front view of a piston of an internal combustion engine in one embodiment of the present utility model;

[0019] Figure 3 It is a side view of the piston of an internal combustion engine in one embodiment of the present utility model.

[0020] Description of main reference numerals:

[0021] 100-internal combustion engine piston, 10-piston body, 11-mounting hole, 12-main force area, 20-oil ring groove, 21-oil return hole, 30-Tesla valve, 31-main flow channel, 32-flow channel unit, 40-gas ring groove. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0023] like Figure 1-3 As shown, an internal combustion engine piston 100 in one embodiment of the present invention comprises a piston body 10, an oil ring groove 20, and a Tesla valve 30. The oil ring groove 20 is circumferentially recessed in the outer wall of the piston body 10 for mounting an oil ring. The Tesla valve 30 is axially recessed in the outer wall of the piston body 10 and positioned below the oil ring groove 20. One end of the Tesla valve communicates with the oil ring groove 20, and the other end extends to the lower end of the piston body 10. The Tesla valve is a unidirectional conducting structure, and in this embodiment, its conducting direction is from the lower end to the top of the piston body 10.

[0024] When the internal combustion engine piston 100 moves downward, the lubricating oil moves upward, triggering the forward conduction acceleration characteristic of the Tesla valve 30. This increases the lubricating oil flow rate, allowing it to flow more quickly into the oil return hole within the oil ring groove 20, thus improving oil return. When the internal combustion engine piston 100 moves upward, the lubricating oil moves downward, triggering the reverse conduction blocking characteristic of the Tesla valve 30. This reduces the lubricating oil flow rate, allowing the lubricating oil to remain better within the channel, allowing it to be evenly distributed on the inner wall of the cylinder, thus preparing for the next lubricating oil film to be established. Therefore, the Tesla valve 30 on the piston body 10 can help the internal combustion engine piston 100 to better apply and scrape oil within the cylinder, improving lubrication efficiency and preventing mechanical damage or destruction.

[0025] Specifically, each Tesla valve 30 includes a main channel 31 and multiple channel units 32 connected to the main channel 31. The main channel 31 is zigzagging and has multiple corners, with the channel units 32 distributed at different corners. Furthermore, the multiple channel units 32 are sequentially arranged on both sides of the main channel 31.

[0026] When the lubricating oil flows in the conducting direction, it splits into two paths at the flow channel unit 32 and then re-converges, then splits into two paths again at the next flow channel unit 32 and then re-converges, and so on. At this time, the two paths of lubricating oil converge in the same direction and the flow rate is accelerated.

[0027] When the lubricating oil flows in the opposite direction, it splits into two paths at the flow channel unit 32 and then rejoins. However, the two paths now flow in opposite directions, and the returning path creates resistance, slowing the flow rate. The multiple flow channel unit 32 blocks the lubricating oil, making it difficult for it to flow.

[0028] Since the lubricating oil in the Tesla valve 30 mainly flows in the main channel 31, only a portion of the lubricating oil flows in the flow channel of the flow channel unit 32 to accelerate the lubricating oil in the main channel 31. Therefore, preferably, the width of the main channel 31 is greater than the width of the flow channel in the flow channel unit 32.

[0029] Preferably, a plurality of Tesla valves 30 are provided on the outer wall of the piston body 10. For example Figure 1 In the illustrated embodiment, four Tesla valves 30 are provided on the outer wall of the piston body 10, and a mounting hole 11 for mounting a piston pin is provided on the piston body 10. The areas of the piston body 10 on both sides of the mounting hole 11 serve as the primary load-bearing areas 12. Two primary load-bearing areas 12 are formed on the piston body 10, each of which is provided with two Tesla valves 30. The Tesla valves 30 are located at either end of the primary load-bearing area 12, i.e., near the mounting holes 11 at either end. This design allows for the release of some of the pressure and temperature when the oil film pressure and temperature in the primary load-bearing area 12 are excessive, providing a corresponding automatic unloading capability.

[0030] like Figure 1-3 As shown, a pair of oil return holes 21 are provided within the oil ring groove 20, evenly distributed at the bottom of the groove 20 and connected to the other side of the internal combustion engine piston 100. As the internal combustion engine piston 100 moves downward, scraped lubricating oil flows through the oil return holes 21 into the interior of the internal combustion engine piston 100, then falls under the action of gravity. Each Tesla valve 30 is connected to a specific oil return hole 21, ensuring that the lubricating oil within the Tesla valve 30 flows into the oil return hole 21 as quickly as possible during downward movement.

[0031] It is easy to imagine that an annular gas ring groove 40 is also provided on the piston body 10 for placing a gas ring (not shown). The gas ring is used to prevent the gas in the combustion chamber above the internal combustion engine piston 100 from flowing downward and acts as an oil pump when moving upward.

[0032] In one embodiment, the top of the piston body 10 can be a flat top surface. Of course, in accordance with the position of the intake valve and the exhaust valve, the top surface of the piston body 10 can be designed to be uneven, that is, grooves are designed at the positions corresponding to the intake valve and the exhaust valve, which is more conducive to gas mixing and combustion in the combustion chamber.

[0033] The present invention also provides an internal combustion engine, which uses the above-mentioned internal combustion engine piston 100 to enable lubricating oil to flow fully in the cylinder, thereby improving the lubrication effect and preventing mechanical damage.

[0034] 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 present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0035] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A piston for an internal combustion engine, characterized in that: include: Piston body; An oil ring groove is recessed on the outer wall of the piston body and is used to install an oil ring. A plurality of oil return holes are opened in the oil ring groove; The Tesla valve is arranged on the outer wall of the piston body and located below the oil ring groove. The conduction direction of the Tesla valve is from the lower end of the piston body to the top of the piston. One end of the Tesla valve is connected to the oil ring groove, and the other end extends to the lower end of the piston body.

2. The internal combustion engine piston according to claim 1, characterized in that A plurality of Tesla valves are arranged on the outer wall of the piston body.

3. The internal combustion engine piston according to claim 2, characterized in that The piston body is provided with a mounting hole for mounting a piston pin, and the plurality of Tesla valves are distributed on both sides of the mounting hole and are close to the mounting hole.

4. The internal combustion engine piston according to claim 2, characterized in that Each of the Tesla valves is connected to one of the oil return holes.

5. The internal combustion engine piston according to claim 1, characterized in that Each of the Tesla valves includes a main channel and a plurality of flow channel units communicating with the main channel.

6. The internal combustion engine piston according to claim 5, characterized in that The flow channel units are sequentially arranged on both sides of the main flow channel.

7. The internal combustion engine piston according to claim 5, characterized in that The flow channel width of the flow channel unit is smaller than the width of the main flow channel.

8. The internal combustion engine piston according to claim 1, characterized in that It also includes an air ring groove, and the oil ring groove is arranged between the air ring groove and the Tesla valve.

9. The internal combustion engine piston according to claim 1, characterized in that The piston body has a flat or non-flat top surface.

10. An internal combustion engine, characterized in that: The invention comprises the internal combustion engine piston according to any one of claims 1 to 9.

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