KR20030021475A - Compression ring of piston for vehicle - Google Patents

Abstract

PURPOSE: A compression ring of a piston for a vehicle is provided to reduce an amount of blow-by gas by attaching a sealing member which is magnetic at each end of a compression ring to prevent combustion gas from being leaked through a gap formed between end parts of the compression ring. CONSTITUTION: Compression rings(21,22) are inserted into ring slots formed in a piston head of a piston. The piston has the piston head formed with a reinforcement rib, a plurality of ring slots formed at an upper peripheral portion of the piston head, a skirt section, a boss section for installing the piston, and a heat dam for preventing heat from being transferred from the piston head to the skirt section. An oil ring is inserted into the ring slot formed at lower portions of the compression rings(21,22). The compression rings(21,22) have a tension force maintaining member(30) integrally formed at both ends of the compression rings(21,22) and a sealing member(40) inserted into the tension force maintaining member(30).

Description

Compression ring of piston for vehicle

The present invention relates to a compression ring of a piston for an automobile, and in particular, even if the engine is driven at high speed, the overall tension is improved and kept constant, thereby improving the airtight performance with the inner wall of the cylinder, and preventing the occurrence of gaps between the two ends. The present invention relates to a compression ring of an automobile piston that can prevent the leakage of combustion gas as much as possible.

In general, an automobile is a combustion engine that burns gasoline or diesel and liquefied natural gas to obtain a driving force by rotating the crankshaft by using the explosive force, and an internal combustion engine having a cylinder that compresses and mixes a fuel and air mixture (hereinafter referred to as an engine). Equipped with).

Here, the engine has a cylinder block forming a plurality of cylinders, a cylinder head provided on an upper portion of the cylinder block to provide a combustion chamber, and an expansion process caused by an explosion while reciprocating to raise and lower the cylinder mounted in the cylinder. The piston is provided to perform the role of receiving the gas pressure of the high temperature and high pressure generated from the transfer to the crankshaft through the connecting rod.

As shown in FIG. 1, the piston 10 includes a piston head 11 having a reinforcing rib 11a formed on an inner surface thereof as a part of the combustion chamber, and a constant portion on the outer peripheral surface of the upper end of the piston head 11. A plurality of ring grooves 12 formed at intervals, a skirt portion 13 receiving side pressure during reciprocating motion, a boss portion 14 on which a piston pin is installed, and a row of portions of the piston head 11 are skirt portions 13. Hit Dam (not shown), etc., are provided to prevent transmission to the tank.

Compression rings 21 and 22 are inserted into the ring grooves 12 to maintain the airtightness with the cylinder wall surface, respectively, and the ring grooves 12 formed under the compression rings 21 and 22 are provided with excess oil. The oil ring 23, which is adapted to adjust the oil film of the cylinder wall while scraping down, is fitted in the structure.

Here, the compression rings (21, 22) is a first compression ring 21 is coupled to the ring groove 12 formed in the position closest to the piston head 11 and the ring groove formed in the lower portion of the first compression ring 21 The second compression ring 22 is fitted to (12) to be coupled.

Meanwhile, in order to insert the compression rings 21 and 22 into the ring grooves 12 and 13, the compression rings 21 and 22 need to be cut in a predetermined section. Thus, the compression rings 21 and 22 are cut in the predetermined sections. Both ends are provided, and both ends of the compression rings 21 and 22 are called end portions of the compression rings 21 and 22, respectively.

However, the conventional compression rings 21 and 22 as described above have a gap d between the compression stroke of the piston 10 and the end portion of the compression rings 21 and 22, as shown in FIG. Due to the leak through, there is a problem that the performance of the engine is reduced while increasing the amount of blow-by gas (blow-by gas).

In addition, the engine oil is excessively introduced into the combustion chamber through the gap (d) between the end portions of the compression rings (21, 22) during the lifting and lowering movement of the piston (10), thereby reducing the power (power) of the engine to the atmosphere There was also a problem that the amount of exhaust gas discharged to

In addition, when the engine is operated at a high speed, it is difficult for the conventional compression rings 21 and 22 to maintain a proper tension due to the gap d between the end portions, thereby reducing the airtight performance with the cylinder inner wall. .

Meanwhile, the arrow M shown in FIG. 2 shows the combustion gas leaking through the gap d between the end portions.

Accordingly, the present invention has been made to solve all the problems described above, by connecting the tension holding means through the airtight holding means using the elasticity, while respectively combining the tension holding means using magnetic to both ends of the compression ring, The combustion gas generated during the compression stroke and the expansion stroke is prevented from leaking through the gap between the end portions of the compression ring, thereby improving the performance of the engine while reducing the amount of blow-by gas. The gap between the end portions during the down movement prevents engine oil from excessively entering the combustion chamber, reducing the amount of exhaust gas discharged to the atmosphere, and maintaining the overall tension of the compression ring even when the engine is running at high speed. The piston of the car that can improve the airtight performance with the inner wall To provide an chukring it is an object.

The present invention for achieving the above object, the tension holding means to maintain a constant overall tension using a magnet having a repulsive force against each other while being integrally coupled to each end, both ends to connect the tension holding means It is characterized in that it comprises a hermetic holding means that is fitted to each of the tension holding means () while maintaining the airtight performance with the cylinder wall surface using the elastic force.

1 is a perspective view for explaining a general piston,

Figure 2 is a perspective view for explaining a conventional compression ring,

3 and 4 is a schematic front view and a partial longitudinal cross-sectional view for explaining a compression ring provided with a tension holding means and an airtight holding means in accordance with the present invention.

<Description of Symbols for Main Parts of Drawings>

10-Piston 11-Piston Head

12-Ring Groove 21,22-Compression Ring

30-tension retaining means 31-first magnetic member

31a, 32a-fitting groove 32-2nd magnetic member

40-confidentiality means 41-first coupling member

42-second coupling member 43-elastic member

44-corrugated pipe member

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

3 and 4 are schematic front and partial longitudinal cross-sectional views for explaining a compression ring provided with a tension holding means and an airtight holding means according to the present invention, will be described with the same reference numerals to the same parts as the conventional structure. .

Compression rings 21 and 22 according to the present invention are configured to be fitted into the ring groove 12 of the piston head 11 provided in the piston 10, respectively.

That is, as described above with reference to FIG. 1, the piston 10 includes a piston head 11 having a reinforcing rib 11a formed on an inner surface thereof as a part of the combustion chamber, and an upper end of the piston head 11. A plurality of ring grooves 12 formed on the outer circumferential surface at regular intervals, a skirt portion 13 receiving side pressure during reciprocating motion, a boss portion 14 on which a piston pin is installed, and a row of the piston head 11 skirts A heat dam (not shown) is provided to prevent delivery to the unit 13.

Compression rings 21 and 22 for holding the airtight with the cylinder wall surface are fitted into the ring groove 12, respectively, and the ring groove 12 formed under the compression rings 21 and 22 is provided with excess oil. The oil ring 23, which is adapted to adjust the oil film of the cylinder wall while scraping down, is fitted in the structure.

Here, the compression rings (21, 22) is a first compression ring 21 is coupled to the ring groove 12 formed in the position closest to the piston head 11 and the ring groove formed in the lower portion of the first compression ring 21 The second compression ring 22 is fitted to (12) to be coupled.

In addition, in order to insert the compression rings 21 and 22 into the ring grooves 12 and 13, the compression rings 21 and 22 should be cut in a predetermined section. As a result, the compression rings 21 and 22 are cut in the compression rings 21 and 22. Both ends are provided, and both ends of the compression rings 21 and 22 are called end portions of the compression rings 21 and 22, respectively.

Meanwhile, as shown in FIGS. 3 and 4, the compression rings 21 and 22 according to the present invention are magnetically coupled to both ends (end portions) of the compression rings 21 and 22 while having repulsive force with respect to each other. Tension holding means 30 to maintain a constant overall tension by using, and both ends are coupled to each of the tension holding means 30 so as to connect the tension holding means 30 with the cylinder wall surface using an elastic force It is configured to include a hermetic holding means 40 to maintain the hermetic performance.

Here, the tension holding means 30 and the first magnetic member 31 which is integrally coupled to one end of the compression ring (21, 22) having one of the pole (N) or the pole (S) of the polarity; The second magnetic member 32 has the same polarity as the first magnetic member 31 and is integrally coupled to face the first magnetic member 31 at the other ends of the compression rings 21 and 22. .

In addition, the airtight holding means 40, the first coupling member 41 is coupled to the front end toward the second magnetic member 32 while being fitted into the fitting groove 31a formed in the first magnetic member 31. ), A second coupling member 42 which is inserted into the fitting groove 32a formed in the second magnetic member 32 so that the front end thereof faces toward the first magnetic member 31, and the first and second ones. Both ends are coupled to the ends of the coupling members 41 and 42, respectively, and the elastic member 43 having a tensile force in a direction of narrowing the interval between the first and second coupling members 41 and 42, and the elastic member 43 Wrapped and protected, and both ends are coupled to the front ends of the first and second coupling members 41 and 42, respectively, to be composed of a corrugated pipe member 44 whose length of the overall length is changed in accordance with the change in the length of the elastic member 43.

Meanwhile, the fitting grooves 31a and 32a formed in the first and second magnetic members 31 and 32 are opened to face each other at both end surfaces of the first and second magnetic members 31 and 32, and the grooves toward the inner side thereof. It has a structure formed in the shape of a longitudinal section (also called a wing of a butterfly) that gradually increases its cross-sectional area.

In addition, the fitting grooves 31a and 32a have the same longitudinal cross-sectional shape on both side surfaces of the first and second magnetic members 31 and 32 as well as on the side surfaces of the first and second magnetic members 31 and 32. It is formed so as to open.

In addition, the first and second coupling members 41 and 42 of the airtight holding means 40 are also formed to have the same longitudinal cross-sectional shape as the fitting grooves 31a and 32a. The 41 and 42 are formed to have a size slightly smaller than the fitting grooves 31a and 32a so that the fitting grooves 31a and 32a can be easily fitted into the fitting grooves 31a and 32a.

Accordingly, the first and second coupling members 41 and 42 of the airtight holding means 40 are not coupled to each other by being fitted from the openings at both end faces of the first and second magnetic members 31 and 32. The first and second magnetic members 31 and 32 have a structure that is fitted by being fitted from the side openings.

As such, when the first magnetic member 31 and the second magnetic member 32 having the same polarity are coupled to both ends (end portions) of the compression rings 21 and 22 according to the present invention, the compression rings 21 and Both ends of the 22 end portions have tensions to be separated from each other by the magnets of the first and second magnetic members 31 and 32, so that the compression rings 21 and 22 and the cylinder are operated even when the engine is operated at a high speed. Since the gap between the inner wall is always properly maintained, the overall airtight performance of the piston 10 is improved accordingly.

In addition, according to the present invention, when both ends of the airtight holding means 40 having a tensile force by the elastic member 43 are fitted to the first and second magnetic members 31 and 32, respectively, the first and second magnetic members Since the gap between the members 31 and 32 is eliminated by the airtight holding means 40 according to the present invention, it is possible to prevent the leakage of the combustion gas generated during the compression stroke and the expansion stroke of the piston 10 to the maximum, This can reduce the amount of blow-by gas as much as possible and improve the performance of the engine.

In addition, when the gap between the first and second magnetic members 31 and 32 is removed by the airtight holding means 40 according to the present invention, the engine oil is excessively transferred to the combustion chamber during the lifting and lowering movement of the piston 10. It is possible to prevent the inflow of water, thereby improving the power of the engine, and also reducing the amount of exhaust gas discharged to the atmosphere, thereby helping to reduce environmental pollution.

As described above, according to the present invention, the first magnetic member and the second magnetic member having the same polarity are coupled to both ends (end portions) of the compression ring, respectively, and both ends of the airtight holding means having tensile force to the first and second magnetic members. These are combined, respectively, even when the engine is running at high speed, the gap between the compression ring and the cylinder inner wall is always properly maintained to improve the overall airtight performance of the piston, the gap between the first and second magnetic members is airtight By being eliminated by to prevent the leakage of the combustion gas generated during the compression stroke and the expansion stroke of the piston to the maximum, and also to prevent excessive inflow of engine oil into the combustion chamber during the lifting and lowering movement of the piston, thereby As the power of the engine improves, it also reduces the amount of exhaust gas emitted to the atmosphere. It is good.

Claims (3)

Tension holding means 30 which is coupled to both ends integrally with each other to maintain a constant overall tension by using a magnet having a repulsive force against each other, and both tension holding means so as to connect the tension holding means 30 Compression ring of an automobile piston comprising a hermetic holding means (40) which is fitted to the 30 and coupled to maintain the hermetic performance with the cylinder wall surface using an elastic force. The first magnetic member (31) of claim 1, wherein the tension maintaining means (30) is coupled to one end of the compression rings (21, 22) while having the polarity of either the negative pole (N) or the south pole (S). And a second magnetic member 32 having the same polarity as the first magnetic member 31 and coupled to face the first magnetic member 31 at the other ends of the compression rings 21 and 22. Compression ring of piston for automobile. The first coupling according to claim 1, wherein the airtight holding means (40) is fitted into the fitting groove (31a) formed in the first magnetic member (31) so that the tip thereof is directed toward the second magnetic member (32). A second coupling member 42 coupled to the member 41 and a fitting groove 32a formed in the second magnetic member 32 such that a tip thereof is directed toward the first magnetic member 31; Both ends are coupled to the ends of the first and second coupling members 41 and 42, respectively, and the elastic member 43 having a tensile force in a direction of narrowing the interval between the first and second coupling members 41 and 42, and the elastic member ( 43 is formed of a corrugated pipe member 44 which is wrapped and protected and has both ends coupled to the front ends of the first and second coupling members 41 and 42, respectively, and the length of the overall length is changed according to the length change of the elastic member 43. Compression ring of an automobile piston, characterized in that the.