Piston ring land structure for an internal combustion engine

Abstract

The utility model discloses an internal -combustion engine piston ring bank structure belongs to the technical field of piston, including piston body, and piston body includes head and apron, is seted up with a plurality of piston ring grooves on the head, forms the ring bank between two adjacent piston ring grooves, and is seted up with at least one annular oil storage groove of rectangular section at every ring bank department. The utility model discloses an internal -combustion engine piston ring bank structure, through the annular oil storage groove of setting, let lubricating oil soak into the whole tank with the surface tension inherent of liquid, is not easy to flow out, when the up and down movement of piston body, can take lubricating oil to greater range, give piston body and ring bank better lubrication, and this small and have depth's annular oil storage groove let lubricating oil soak into the whole tank with the surface tension inherent of liquid, is not easy to flow out, when the up and down movement of piston, can take lubricating oil to greater range, give piston and ring better lubrication.

Description

Technical Field

[0001] This utility model relates to the field of piston technology, and in particular to a piston ring land structure for an internal combustion engine. Background Technology

[0002] In order to meet increasingly stringent emission regulations, major manufacturers of modern internal combustion engines are conducting a series of studies on reducing fuel consumption and improving thermal efficiency. In an internal combustion engine, fuel is combusted in the cylinder. Some of the energy drives the piston to do work and output kinetic energy, some is lost as heat in the exhaust, and another part is lost in the friction of the friction pairs. Among them, the friction pairs of piston, ring, and cylinder liner lose the largest proportion of energy. This patent has a chamfered annular oil reservoir at the bottom of the rectangular cross-section cut on the piston ring land. During the piston movement, it can provide a better oil film between the piston ring assembly and the cylinder liner, reduce friction, and improve the service life of the powertrain (including piston, piston ring, and cylinder liner).

[0003] To address the aforementioned problems, a piston skirt lubrication structure has emerged. For example, Chinese Utility Model Patent CN206816379U discloses a piston skirt lubrication structure comprising a piston body with a head and a skirt. The skirt is characterized by having a spiral-shaped lubricating oil groove on its outer circumferential surface, with a depth of 0.003-0.01 mm and a width of 0.2-0.3 mm. This utility model not only has a simple structure and reliable operation but also effectively solves the problem of wear marks caused by friction between the piston skirt and the cylinder. However, the depth of the aforementioned lubricating oil groove is 0.003-0.01 mm, and the width of the lubricating oil groove is 0.2-0.3 mm. Alternatively, some oil storage patterns can be woven on the piston surface using lasers. These ripples and patterns are relatively shallow and wide. After the engine stops, due to the surface tension of the liquid, the lubricating oil can still easily flow out of the lubricating oil groove. When the engine is cold-started, the starting speed is slow, which can easily damage the engine. Therefore, an internal combustion engine piston ring land structure is proposed to solve the above problems. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a piston ring land structure for an internal combustion engine.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: This utility model discloses a piston ring land structure for an internal combustion engine, including a piston body, the piston body including a head and a skirt, the head having multiple piston ring grooves, and a ring land being formed between two adjacent piston ring grooves, with at least one annular oil reservoir at each ring land.

[0006] As a preferred embodiment of this utility model, the annular oil storage tank has a rectangular cross-section with a width of 0.1-1.0 mm and a depth of 0.2-2 mm. The bottom of the annular oil storage tank is rounded with a radius of 0.1-0.5 mm.

[0007] As a preferred technical solution of this utility model, the cross-section of the annular oil storage tank is rectangular, semi-circular, or semi-circular.

[0008] As a preferred embodiment of this utility model, the depth-to-width ratio of the annular oil storage tank is 0.3-10 times.

[0009] As a preferred embodiment of this utility model, the number of annular oil storage tanks is 1-20.

[0010] As a preferred technical solution of this utility model, the annular oil storage tank is formed by cutting or laser forming.

[0011] As a preferred technical solution of this utility model, the annular oil storage tank is located on the uppermost annular bank and on the outer circular surface of each of the lower annular banks.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention relates to a piston ring land structure for an internal combustion engine. The annular oil reservoir allows lubricating oil to permeate the entire reservoir due to the inherent surface tension of the liquid, preventing it from flowing out. During the piston's up-and-down movement, the lubricating oil is carried over a wider area, providing better lubrication to the piston and ring lands. This small and deep annular oil reservoir allows the lubricating oil to permeate the entire reservoir due to the inherent surface tension of the liquid, preventing it from flowing out. During the piston's up-and-down movement, the lubricating oil is carried over over a wider area, providing better lubrication to the piston and rings. Even after the engine is stopped, the lubricating oil remains in the reservoir due to the surface tension of the liquid and does not flow out. During a cold start, it can instantly provide a lubricating film to the piston and rings, making the start-up faster and protecting the engine. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an overall sectional view of the present invention; Figure 3 This is one of the enlarged cross-sectional views of the annular oil storage tank of this utility model; Figure 4 This is the second enlarged view of the cross-section of the annular oil storage tank of this utility model; Figure 5 This is the third enlarged view of the cross-section of the annular oil storage tank of this utility model; In the diagram: 1. Piston body; 11. Head; 12. Skirt; 3. Around the shore; 4. Annular oil storage tank. Detailed Implementation

[0014] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0015] Example 1: Figure 1-3 This utility model provides a piston ring land structure for an internal combustion engine, including a piston body 1. The piston body 1 includes a head 11 and a skirt 12. Multiple piston ring grooves are formed on the head 11, and a ring land 3 is formed between two adjacent piston ring grooves. At least one annular oil reservoir 4 is formed at each ring land 3.

[0016] In this embodiment, the annular oil reservoir 4 allows the lubricating oil to permeate the entire reservoir by means of the inherent surface tension of the liquid, making it difficult for it to flow out. When the piston body 1 moves up and down, the lubricating oil can be carried to a larger area, providing better lubrication for the piston body 1 and the ring land 3.

[0017] Example 2: Preferably, as another embodiment of this utility model, in Figure 1 Based on the embodiment shown, the annular oil storage tank 4 has a rectangular cross-section with a width of 0.1-1.0 mm and a depth of 0.2-2 mm. The bottom of the annular oil storage tank 4 has rounded corners with a radius of 0.1-0.5 mm.

[0018] In this embodiment, as one implementation method, the small and deep annular oil reservoir 4 allows the lubricating oil to permeate the entire reservoir due to the inherent surface tension of the liquid, making it difficult for it to flow out. When the piston moves up and down, it can carry the lubricating oil to a larger area, providing better lubrication for the piston and rings. After the engine stops, the lubricating oil will remain in the reservoir due to the surface tension of the liquid and will not flow out. When the engine is cold-started, it can instantly provide a lubricating oil film to the piston and rings, making the start-up faster and protecting the engine.

[0019] Preferably, such as Figure 4 and Figure 5 As shown, the cross-section of the annular oil storage tank 4 is rectangular, semi-circular, or semi-circular.

[0020] Preferably, the depth-to-width ratio of the annular oil storage tank 4 is 0.3-10.

[0021] Preferably, the number of annular oil storage tanks 4 is 1-20.

[0022] Preferably, the annular oil storage tank 4 is formed by cutting or laser forming.

[0023] Preferably, the annular oil storage tank 4 is located on the uppermost annular bank 3 and on the outer circular surface of each of the lower annular banks 3.

[0024] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A piston ring land structure for an internal combustion engine, comprising a piston body (1), the piston body (1) including a head (11) and a skirt (12), characterized in that, The head (11) is provided with multiple piston ring grooves, and a ring bank (3) is formed between two adjacent piston ring grooves. At least one annular oil storage groove (4) is provided at each ring bank (3).

2. The piston ring land structure for an internal combustion engine according to claim 1, characterized in that, The annular oil storage tank (4) has a rectangular cross-section with a width of 0.1-1.0 mm and a depth of 0.2-2 mm. The bottom of the annular oil storage tank (4) is rounded with a radius of 0.1-0.5 mm.

3. The piston ring land structure for an internal combustion engine according to claim 2, characterized in that, The cross-section of the annular oil storage tank (4) is rectangular, semi-circular, or semi-circular.

4. The piston ring land structure for an internal combustion engine according to claim 2, characterized in that, The depth-to-width ratio of the annular oil storage tank (4) is 0.3-10 times.

5. A piston ring land structure for an internal combustion engine according to any one of claims 1-4, characterized in that, The number of the annular oil storage tanks (4) is 1-20.

6. A piston ring land structure for an internal combustion engine according to any one of claims 1-4, characterized in that, The annular oil storage tank (4) is formed by cutting or laser forming.

7. A piston ring land structure for an internal combustion engine according to any one of claims 1-4, characterized in that, The annular oil storage tank (4) is located on the uppermost annular bank (3) and on the outer circular surface of each of the annular banks (3) below it.

Images