WO1997030277A1

WO1997030277A1 - A piston assembly with self-adjusting and self-lubricating device

Info

Publication number: WO1997030277A1
Application number: PCT/CN1996/000031
Authority: WO
Inventors: Baodong Wang; Ping Cai; Chuansi Xue; Xiaoshan Cai
Original assignee: Baodong Wang; Ping Cai; Chuansi Xue; Xiaoshan Cai
Priority date: 1996-02-14
Filing date: 1996-05-03
Publication date: 1997-08-21
Also published as: AU5495396A; CN2260173Y

Abstract

The present invention relates to a piston assembly with self-adjusting and self-lubricating device. This piston assembly has two piston rings, i.e. one is a combination compression ring, the other is a combination oil control ring. The combination compression ring is composed of a main ring element and an auxiliary ring element. The two ring elements engage with each other on their flat sides, and there is a notch for accommodating lubrication oil provided in the engaging portion. Similarly, the combination oil control ring is composed of a secondary compression ring and a main oil control ring. The construction of the combination oil control ring is substantially as same as that of the combination compression ring. Because the piston assembly has only two rings, its weights, friction forces and inertial forces can thus be reduced, and its sealability, output power can be increased, therefore, the fuel consumption, noise and emission of an engine can be reduced.

Description

Explanation book

With automatic lubrication and

TECHNICAL FIELD

The invention relates to a piston assembly part on an internal combustion engine and an air compressor, and more particularly to a piston assembly with an automatic lubrication and clearance adjustment device. Background technique

The present invention is an "automatic air gap adjusting ring on an internal combustion engine piston" (application number 91200733. 8), which I applied on January 19, 1992, and an "automatic lubricating gap adjusting piston ring", which I applied on September 27, 1995 ( Application number: 95222416.x) for re-application, although in my first application, the chattering breech, open air leakage and backlash leakage between the piston ring and the cylinder wall and between the piston body and the piston ring were solved Gas, etc., but the lubrication performance is not good, the friction resistance is large, and the persuasion rate is large. In my second application, although the lubrication problem in the first application was solved, the service life of the piston and piston ring was greatly extended, but it still did not break through the traditional concept. It is still two to two on each piston component. Three air rings and one oil ring (a total of three to four rings). Since there are two to three air rings and one oil ring on each piston assembly, there are actually three to three between the piston ring and the cylinder wall. Four friction pairs (each ring is a friction pair). This will inevitably increase the frictional resistance of the piston during persuasion. Because there are many piston rings, the weight of the piston assembly also increases, and the inertial resistance I of the piston in the cylinder increases. Large, resulting in large engine power consumption, reducing the total output of the engine. Summary of the Invention

The purpose of the present invention is to solve the problems of large friction resistance and large inertia resistance existing in the existing piston assembly, and to provide a piston assembly with only one air ring and one oil ring. The piston assembly with an automatic lubrication clearance adjustment device can reduce the persuasion caused by the frictional resistance and inertial resistance of the piston, improve the output of the engine, and reduce exhaust pollution and noise.

The technical solution of the present invention is composed of a piston body (1), an air ring (3), (4), (5) and an oil ring (2), which is characterized in that there are only two pistons on the piston body (1) A ring groove is provided in the piston ring groove of the piston neck portion with a combined air ring composed of a positive ring (4) and an auxiliary ring (5), and a piston groove in the lower portion of the piston is provided with an auxiliary air ring (3) and The combined oil ring of the main oil ring (2), the positive ring U) and the auxiliary ring (5) in the air ring groove of the piston, and the auxiliary air ring (3) and the main oil ring in the oil ring groove of the piston (2) The smooth bevels are matched with each other and can slide relative to each other. The cross-sectional shape of each piston ring assembled on the piston body (1) can be a trapezoidal, rectangular or polygonal shape. The notched edge portion of the ring constitutes an oil ring groove (6) for storing f & lubricating oil.

Since the piston assembly of the present invention has only two piston rings, that is, a combined air ring and a combined oil ring, this reduces at least one to two piston rings compared with the existing engine piston assembly, thereby reducing two frictional charges. This greatly reduces the amount of friction percussion, and also reduces the piston ring, which reduces the weight of the piston assembly, reduces the inertial resistance of the piston's reciprocating motion, improves the efficiency of the engine, and reduces emissions and noise. Due to the use of automatic lubrication and adjustment of the combined gas ring and combined oil ring, although there are only two rings on the entire piston assembly, but after testing the cylinder pressure and performing the engine running bench test, the air tightness of the piston is greater than the existing The airtightness of the four-way ring is doubled, and the fuel consumption of the engine is reduced, and the service life of the piston ring is greatly extended.

The following is a brief description of the drawings

FIG. 1 is a block diagram of a piston assembly with an automatic lubrication and clearance adjustment device according to the present invention. FIG. 2 is a diagram of a combined air ring knot on a piston assembly of the present invention.

Fig. 3 is a cross-sectional view taken along A-A in Fig. 2.

FIG. 4 is a diagram of a combined oil ring in a piston assembly according to the present invention.

Fig. 5 is a sectional view taken along the line B-B in Fig. 4.

6a, b, and c are sectional shapes of the combined air ring, which are U-shaped, V-shaped, and γ-shaped, respectively. A cross-sectional view of a storage oil reservoir.

Figures 7a, b, and c are cross-sectional views of the sectional shape of the combined gas ring, which is rectangular and polygonal, and the outer contour is curved.

Figures 8a, b, and c are sectional views of a combined oil ring with trapezoidal, polygonal, and curved outer contours, respectively. Best Mode of the Invention

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIG. 1, a piston assembly designed by using the present invention on a 1105 type internal combustion engine in China is composed of a piston body (1), an air ring (3), (4), (5), and an oil ring (2). The piston assembly of the present invention has only two rings. First, the upper part of the piston is a combined air ring, which is composed of a positive ring (4) and an auxiliary ring (5). The positive ring (4) and the auxiliary ring (5) use a smooth inclined surface to automatically adjust the clearance. To increase the air-tightness of the combined air ring, a notch ring groove is provided at the contact portion of the main ring (4) and the auxiliary ring (5) with the cylinder liner, thereby forming a ring groove (6) for storing the lubricant, which acts as a self-lubricating ring. Slippery effect. Second, the lower part of the piston is a combined oil ring, which is formed by the auxiliary air ring (3) and the main oil ring (2). The auxiliary air ring and the main oil ring also use a smooth inclined surface and have a notched ring groove ( 6) The function of automatic clearance adjustment and lubrication is formed. The shape of the ring groove (6) for storing the lubricating oil in the combined air ring and combined oil ring can be U-shaped, V-shaped, or Y-shaped (as shown in Figures 6, 7, and 8), and can be based on different engines. Optional. Similarly, the cross-sectional shape of each ring can be designed as a trapezoid, rectangle or polygon with a lack of angle, and its outer contour can be designed as a curve.

By adopting the piston assembly designed by the present invention, since the piston assembly is equipped with a combined gas and oil ring capable of achieving automatic clearance adjustment and lubrication, the entire piston assembly can achieve air tightness than the existing piston assembly with only two rings. Better results. As the piston ring is reduced, the overall weight is reduced, and its frictional resistance and inertial resistance are reduced, which makes the entire engine better than existing products in terms of power and economic fuel consumption, and also reduces engine emissions pollution. And working noise.

In summary, it is entirely possible for those skilled in the art to make various improvements without departing from the scope of protection of the present specification and claims.

Claims

Claim

1. A piston assembly with an automatic lubrication and clearance adjustment device, comprising a piston body (1), an air ring (3), (4), (5) and an oil ring (2), characterized in that The piston body (1) has only two piston ring grooves. A combined air ring composed of a positive ring (4) and an auxiliary ring (5) is arranged in the piston ring groove of the piston neck portion, and a piston ring groove in the lower part of the piston A combined oil ring with an auxiliary air ring (3) and a main oil ring (2), a positive ring (4) and an auxiliary ring (5) in the piston air ring groove, and an auxiliary in the oil ring groove are arranged inside. The air ring (3) and the main oil ring (2) are fitted with smooth bevels and can slide relative to each other. The cross-sectional shape of each piston ring assembled on the piston body (1) can be a trapezoidal or rectangular or The polygonal shape forms an oil storage ring groove (6) for storing lubricating oil at the corner edge portion of the two piston rings that cooperate with each other.

2. A piston assembly with an automatic lubrication clearance adjustment device according to claim 1,

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The shape can be U-shaped or V-shaped or γ-shaped.