Combined piston ring
By using a composite piston ring design with staggered openings of the upper, inner, and outer rings, the sealing problem caused by the difference in thermal expansion coefficients of the piston rings is solved, thereby improving the engine's compression ratio and power performance, and reducing oil consumption and emissions.
Patent Information
- Application Number
- CN202511352009.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-22
- Publication Date
- 2025-11-21
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The difference in the coefficient of thermal expansion of different materials makes it difficult to precisely control the piston ring gap, resulting in insufficient engine compression pressure, reduced power performance and increased oil consumption, especially in turbocharged engines, which produces harmful emissions.
The piston rings adopt a combined structure, including an upper ring, an inner ring, and an outer ring. By forming a groove at the connection between the inner and outer rings and ensuring that the thickness and inner diameter of each ring are equal, the staggered opening design improves airtightness and allows for the stacking installation of the upper and lower rings, thus enhancing the sealing effect.
It increases the engine's compression ratio, reduces oil consumption, decreases harmful emissions, and improves power performance and fuel efficiency.
Smart Images
Figure CN120990767A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of machinery, and particularly relates to a combined piston ring. BACKGROUND
[0002] The engine piston ring is a metal ring embedded in the piston groove, which is one of the key components of the engine and mainly plays the roles of sealing, oil control and heat conduction. In the working process of the engine, the piston ring closely adheres to the cylinder wall, can prevent the high-temperature and high-pressure gas in the combustion chamber from leaking into the crankcase, ensures that the engine has sufficient compression pressure, simultaneously conducts the heat of the piston head to the cylinder wall to play the role of cooling the piston, and can control the consumption of engine oil to form a uniform oil film on the cylinder wall to prevent the engine oil from entering the combustion chamber.
[0003] With the continuous development of engine technology, new engines on the market are constantly innovating in material application, but the problems caused by the thermal expansion and cold contraction characteristics of metal are increasingly prominent. Due to the difference in the thermal expansion coefficients of different materials, in the process of engine operation, the opening gap of the piston ring after thermal expansion is difficult to accurately control, and the minimum air leakage cannot be achieved. This makes the compression pressure of the engine insufficient, the power performance decreases, and the optimal working state cannot be achieved. Especially for turbocharged engines, this problem is more prominent, which leads to a significant increase in engine oil consumption. A large amount of engine oil enters the combustion chamber to participate in combustion, which not only causes waste of engine oil, but also produces a large amount of harmful emissions, seriously pollutes the air environment, and poses a threat to the ecological environment and human health. SUMMARY
[0004] In order to solve the above problems, the present application provides a combined piston ring.
[0005] The technical scheme adopted by the present application is as follows: the present application provides a combined piston ring, which comprises an upper ring and a lower ring, the lower ring comprises an inner ring, an outer ring is arranged on the side wall of the inner ring, the inner ring and the outer ring are integrally made, a first opening is arranged on the upper ring, a second opening is arranged on the inner ring, and a third opening is arranged on the outer ring.
[0006] Further, a clamping groove is formed at the connection between the inner ring and the outer ring.
[0007] Further, the thickness of the inner ring and the outer ring is the same, and the thickness of the outer ring and the upper ring is the same.
[0008] Further, the inner diameter of the inner ring and the inner diameter of the outer ring are the same, the outer diameter of the outer ring is smaller than the inner diameter of the upper ring, and the outer diameter of the upper ring and the outer diameter of the inner ring are the same.
[0009] Further, the upper ring is used to be embedded in the clamping groove.
[0010] Further, the upper ring, the inner ring and the outer ring are concentrically combined and installed in a piston ring groove.
[0011] The application has the following beneficial effects by using the above structure: The upper ring and the lower ring are stacked and staggered to increase the inflation port, thereby increasing the air tightness and the compression ratio by 15-20% power. BRIEF DESCRIPTION OF DRAWINGS
[0012] In order to more clearly illustrate the technical solutions of the present application, the drawings needed to be used in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0013] Figure 1 A combined piston ring body diagram of the present application; Figure 2 A Figure 1 A partial enlarged view of A portion.
[0014] 1, upper ring, 2, lower ring, 3, clamping groove, 4, first opening, 5, inner ring, 6, second opening, 7, outer ring, 8, third opening. DETAILED DESCRIPTION
[0015] In order to make the purpose, features and advantages of the present application more obvious and easy to understand, the technical solutions in the present application will be described clearly and completely below by combining the drawings in the specific embodiments. Obviously, the following described embodiments are only some of the embodiments of the present application, but not all. Based on the embodiments in the present patent, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present patent.
[0016] As Figure 1As shown, the present application provides a combined piston ring, which comprises an upper ring 1 and a lower ring 2, the lower ring 2 comprises a inner ring 5, an outer ring 7 is arranged on the sidewall of the inner ring 5, the inner ring 5 and the outer ring 7 are integrally formed, a clamping groove 3 is formed at the connecting part of the inner ring 5 and the outer ring 7, the upper ring 1 is used for embedding in the clamping groove 3, the thickness of the inner ring 5 and the outer ring 7 is the same, the thickness of the outer ring 7 and the upper ring 1 is the same, the inner diameter of the inner ring 5 and the inner diameter of the outer ring 7 is the same, the outer diameter of the outer ring 7 is smaller than the inner diameter of the upper ring 1, the outer diameter of the upper ring 1 and the outer diameter of the inner ring 5 is the same, a first opening 4 is arranged on the upper ring 1, a second opening 6 is arranged on the inner ring 5, a third opening 8 is arranged on the outer ring 7, the upper ring 1, the inner ring 5 and the outer ring 7 are concentrically combined and installed in a piston ring groove, the upper ring 1 and the lower ring 2 are overlapped and staggered with the first opening 4, the second opening 6 and the third opening 8, the air tightness is increased, the high temperature and high pressure gas cannot be directly transmitted into the crankcase, the compression ratio is improved by 15-20%, the power is improved by 15-20%, the problem of reducing cylinder pressure of the internal combustion engine (piston sealing ring, cylinder wall wear) is solved, and the gap between the upper ring 1 and the outer ring 7 is 0.05mm-0.1mm.
[0017] In specific use, the upper ring 1 is embedded in the clamping groove 3, the upper ring 1, the inner ring 5 and the outer ring 7 are concentrically combined and installed in a piston ring groove, the installation is completed, the upper ring 1 and the lower ring 2 are overlapped and staggered with the expansion opening, the air tightness is increased, the compression ratio is improved by 15-20%, the power is improved by 15-20%, the above is the working process of the whole application, and the next use can repeat the steps.
[0018] Example one: the application is used in a 2013 ea888 engine car, 10000km annual inspection: no carbon monoxide is measured; the hydrocarbon at high and low speed is only 3, the exhaust pollution emission is reduced, the original spark plug is black carbon after driving 30km, the carbon is grayish white, the carbon is almost completely cleaned up after 900km.
[0019] Example two: the application is used in a 2010 2.0t engine car, user feedback: fuel saving, 6.5 liters per 100 kilometers, official fuel consumption of the Ministry of Industry and Information Technology is 8.3 liters, sufficient power, and exhaust emission is reduced.
[0020] Example three: the application is used in a 3.0 mechanical supercharged engine, user feedback: fuel saving, 6.5 liters per 100 kilometers, sufficient power, and exhaust emission is reduced.
[0021] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A composite piston ring, characterized in that: It includes an upper ring (1) and a lower ring (2). The lower ring (2) includes an inner ring (5). An outer ring (7) is provided on the side wall of the inner ring (5). The inner ring (5) and the outer ring (7) are integrally formed. A first opening (4) is opened on the upper ring (1), a second opening (6) is opened on the inner ring (5), and a third opening (8) is opened on the outer ring (7).
2. The combined piston ring according to claim 1, characterized in that: A groove (3) is formed at the connection between the inner ring (5) and the outer ring (7).
3. A combined piston ring according to claim 2, characterized in that: The inner ring (5) and the outer ring (7) have the same thickness, and the outer ring (7) and the upper ring (1) have the same thickness.
4. A combined piston ring according to claim 3, characterized in that: The inner diameter of the inner ring (5) is the same as the inner diameter of the outer ring (7). The outer diameter of the outer ring (7) is smaller than the inner diameter of the upper ring (1). The outer diameter of the upper ring (1) is the same as the outer diameter of the inner ring (5).
5. A combined piston ring according to claim 4, characterized in that: The upper ring (1) is used to be embedded in the card slot (3).
6. A combined piston ring according to claim 5, characterized in that: The upper ring (1), inner ring (5) and outer ring (7) are concentrically assembled in a piston ring groove.