KR101291686B1

KR101291686B1 - Piston module for internal combustion engine

Info

Publication number: KR101291686B1
Application number: KR1020100101417A
Authority: KR
Inventors: 하상식
Original assignee: 하상식
Priority date: 2010-10-18
Filing date: 2010-10-18
Publication date: 2013-08-01
Also published as: KR20120039949A

Abstract

The piston module for an internal combustion engine according to the present invention includes a cylinder having an intake valve, an exhaust valve and a spark plug mounted thereon, a piston assembly reciprocating between the top dead center and the bottom dead center of a combustion chamber formed inside the cylinder, and the cylinder inner wall described above. And a piston ring assembly mounted on the outer circumferential surface of the piston assembly in close contact with the piston assembly and maintaining the airtight state of the combustion chamber, and the outer diameter increases when the piston assembly is built in the piston assembly and the pressure according to the explosion stroke is applied to the upper side of the piston assembly. According to the exhaust stroke, when the pressure applied to the upper side of the piston assembly is released, the outer diameter is reduced to include a piston ring contact, the above-mentioned piston ring contact is in communication with the above-mentioned piston ring assembly, the piston ring assembly described above Make contact with the inner circumferential surface of the combustion chamber.

Description

Piston module for internal combustion engine {PISTON MODULE FOR INTERNAL COMBUSTION ENGINE}

The present invention relates to a piston module for an internal combustion engine, and more particularly, to a piston module for an internal combustion engine that can maintain a tight airtight in a cylinder while amplifying exhaust pressure due to an explosion stroke to improve combustion efficiency and output.

An internal combustion engine generally refers to a device that converts thermal energy of a supplied fuel into mechanical work by the combustion gas generated by burning fuel directly acting on a component such as a piston or a turbine blade.

In a broad sense, gas turbines, jet engines, rocket engines, and the like can also be referred to as internal combustion engines.However, in general, internal combustion engines generate pressure by igniting a spark plug to a mixture of fuel and air in a cylinder to burn and explode. Refers to the reciprocating engine that moves the piston.

Internal combustion engines are classified into gas engines, gasoline engines, petroleum engines, and diesel engines according to the fuel used.In order to burn fuels, oil, gas, and gasoline engines are ignited by spark plugs, and diesel engines use high temperature fuel. It spontaneously ignites by spraying it under high pressure air.

The main components of the internal combustion engine include a cylinder provided with a combustion chamber and a piston moving along the inner wall of the cylinder. A piston ring is mounted on the outer peripheral surface of the upper side of the piston to interlock with the reciprocating motion between the top dead center and the bottom dead center of the piston. Move along the inner wall.

At this time, the piston ring serves to prevent leakage of the mixed gas and the exhaust gas which are a mixture of air and fuel inside the cylinder.

However, since the piston is subjected to tremendous pressure when the mixed gas is exploded, maintaining the airtightness of the piston ring is a top priority, and maintaining the airtightness of the piston ring is very difficult to maintain the airtightness in the motion of the piston reciprocating repeatedly. There is a problem in that it is necessary to perform a cumbersome operation such as mounting a plurality of piston rings in order to firmly and groove processing for mounting on the piston outer peripheral surface.

In addition, the lowering of the airtightness between the piston and the cylinder leads to a decrease in the engine output as a whole, and the discharge pressure of the exhaust gas decreases in the exhaust stroke after the explosion, which is a loss in terms of efficient management of energy.

The present invention devised to improve the above problems is to provide a piston module for an internal combustion engine that can maintain a tight airtight in the cylinder while amplifying the exhaust pressure according to the explosion stroke to improve the combustion efficiency and output.

In order to solve the above problems, the piston module for an internal combustion engine according to the present invention is configured to reciprocate between the top dead center and the bottom dead center of a cylinder having an intake valve, an exhaust valve, and a spark plug mounted thereon, and a combustion chamber formed inside the cylinder described above. The piston assembly, a piston ring assembly mounted on the outer circumferential surface of the piston assembly in close contact with the cylinder inner wall and maintaining the airtight state of the combustion chamber, and a piston assembly built in the piston assembly described above and the pressure according to the explosion stroke When the upper side is applied to the outer diameter is increased and the pressure is applied to the upper piston assembly according to the exhaust stroke, the outer diameter is reduced to include a piston ring contact, the piston ring contact is in communication with the above-mentioned piston ring assembly The piston ring assembly described above is in close contact with the inner circumferential surface of the combustion chamber. Can be applied to the structure.

The cylinder described above protrudes along the inner circumferential surface of the combustion chamber between the top dead center and the bottom dead center, has an inner diameter corresponding to the outer diameter of the piston assembly, and temporarily delays the movement to the bottom dead center side of the piston assembly according to the explosion stroke. Preferably, the exhaust stroke further includes a bottleneck ring for amplifying the exhaust pressure of the combustion gas in the combustion chamber.

The piston assembly includes a first piston case in which at least one first groove is formed in which the upper part is sealed, the lower part is opened, and at least one first groove in which the piston ring assembly is seated is mounted on the outer peripheral surface of the upper part. A plurality of second piston cases rotatably coupled to each other, in which a piston ring contact hole as described above is mounted on an upper side of the aforementioned connecting rod, and which is coupled to the first piston case, and along the forming direction of the first groove; It is possible to apply a structure including a communication slit penetrating and communicating with the aforementioned piston ring close contact.

Here, the above-mentioned piston ring assembly is coupled to each other from the outer edge of the compression ring and the compression ring is provided with end portions that are opposite to each other seated in at least one first groove provided along at least one outer peripheral surface of the piston assembly described above. And a fixed clip whose outer surface is disposed on a circular arc such as the outer edge of the compression ring described above, wherein the compression ring is adapted to apply the structure in close contact with the cylinder side by increasing the outer diameter of the piston ring contact. desirable.

At this time, the piston ring close contact is formed with a screw thread along the outer circumferential surface and the lower end of the support rod is screwed to adjust the height adjustable to the lower side of the piston assembly, both ends are fixed to the inside of the lower side of the piston assembly described above and provided in the center portion The support nut is provided from a support bracket coupled to the support rod described above, a center piece mounted between the pair of height adjustment nuts penetrating the upper side of the support rod described above and screwed to the support rod, and from the edge of the above-described center piece. On the inner circumferential surface of the piston assembly extending a plurality of radially inclined upwardly toward the inner circumferential surface of the above-described piston assembly and forming a convex arc shape toward the upper side of the above-mentioned cylinder, and extending from both ends of the aforementioned elastic piece to both sides. Including a contact piece corresponding to the arc shape correspondingly It will be able to apply the structure.

In addition, the outer edge of the above-mentioned close contact piece is in contact with the inside of the above-mentioned piston ring assembly, the diameter of the imaginary circle formed by connecting both ends of the above-mentioned close contact piece is the upper side of the piston assembly in which the pressure according to the above-described explosion stroke It is possible to apply a structure that increases when the pressure is applied to and decreases when the pressure applied to the upper side of the piston assembly according to the exhaust stroke is released.

As described above, the piston module for an internal combustion engine according to the present invention has the following advantages.

First, the piston ring assembly is mounted on the outer circumferential surface of the piston assembly to maintain airtightness with the inner wall of the cylinder, and the piston ring assembly is brought into close contact with the inner wall of the cylinder while the outer diameter varies depending on the pressure applied to the upper piston assembly in the explosion and exhaust strokes. According to the structure including the piston ring close contact, the airtightness can be significantly improved.

In addition, according to the structure as described above, the present invention does not need to install a plurality of piston rings, and it is possible to reduce cumbersome work such as additional groove processing on the outer circumferential surface of the piston assembly, thereby reducing material cost and manufacturing cost.

In addition, the present invention can temporarily delay the movement of the piston assembly to the bottom dead center in the explosion stroke by a bottleneck ring provided on the inner wall of the cylinder, and amplify the exhaust pressure of the combustion gas in the exhaust stroke, thereby improving combustion efficiency and output power. Can be.

1 is a cross-sectional conceptual view showing the overall configuration of a piston module for an internal combustion engine according to an embodiment of the present invention.
2 to 5 are conceptual views showing the respective components of the piston assembly which is the main part of the piston module for an internal combustion engine according to an embodiment of the present invention.
6 is a perspective view showing the overall structure of a piston ring assembly which is a main part of a piston module for an internal combustion engine according to an embodiment of the present invention;
7 is a plan conceptual view of a piston ring close contact which is a main part of a piston module for an internal combustion engine according to an embodiment of the present invention;
8 is a plan view showing a state in which a piston ring close contact which is a main part of a piston module for an internal combustion engine according to an embodiment of the present invention is mounted on a piston assembly;
9 to 11 is a cross-sectional conceptual view showing an operating state of the piston module for an internal combustion engine according to an embodiment of the present invention.

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

This is for the purpose of describing the present invention in detail so that those skilled in the art can easily practice the present invention, and thus, the technical spirit and scope of the present invention are not limited thereto.

In addition, the sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation, and the terms defined specifically in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user, operator And the definitions of these terms should be based on the contents throughout this specification.

1 is a cross-sectional conceptual view showing the overall configuration of a piston module for an internal combustion engine according to an embodiment of the present invention.

As shown in the present invention, it can be seen that the configuration includes a cylinder 100, a piston assembly 200, a piston ring assembly 300 and a piston ring close contact 400.

First, the 'combustion chamber' is defined as a space between the top dead center 151 and the bottom dead center 152 of the upper and lower inner peripheral surfaces of the cylinder 100 for reciprocating for convenience of description.

First, the cylinder 100 has an intake valve 110, an exhaust valve 120, and a spark plug 130 mounted on an upper side thereof, and a space in which the piston assembly 200 to be described later reciprocates, that is, a combustion chamber 150 is formed. will be.

In the drawings, reference numeral 500 denotes a connecting rod and 600 denotes a crankcase, respectively.

The cylinder 100 may be utilized for the purpose of being used in the long stroke engine which is formed between the top dead center 151 and the bottom dead center 152 longer than the cylinder of the general piston, the long stroke engine described above Also applies to two-stroke organizations without compression strokes or to three-stroke engines without compression strokes.

The length between the upper and lower dead centers 151 and 152 of the cylinder 100 is longer than that of a general cylinder in order to allow sufficient compression of the sucked fuel in the compression stroke after the suction stroke.

The intake valve 110 opens and closes the flow path for injecting a mixture of fuel and air into the combustion chamber 150 while opening and closing the flow path to the intake port 101 communicating with the combustion chamber 150. Block one flow path.

The exhaust valve 120 opens and closes the flow path to the exhaust port 102 communicating with the combustion chamber 150, and blocks the aforementioned flow path during the explosion stroke, and exhaust gas 102 is discharged from the combustion chamber 150 after the explosion stroke. When discharging through), the aforementioned flow path is opened.

The spark plug 130 ignites the fuel in the combustion chamber 150 to trigger an explosion due to combustion during the explosion stroke.

The spark plug 130 may electrically determine the timing of ignition, and more specifically, the piston assembly 200, which will be described later, may start to move from the top dead center 151 to provide a space between the top dead center 151 and the bottom dead center 152. Sparks when moving, igniting fuel.

On the other hand, the piston assembly 200 is to reciprocate between the top dead center 151 and the bottom dead center 152 of the combustion chamber 150, the space in which the piston ring assembly 300 and the piston ring close contact 400 will be described later To provide.

That is, the piston assembly 200 moves between the top dead center 151 and the bottom dead center 152 by the pressure of the fuel introduced into the combustion chamber 150 from the top dead center 151 during the intake stroke, and the bottom dead center during the explosion stroke. It moves to the point 152 and repeats the movement to the top dead center 151 at the time of an exhaust stroke.

On the other hand, the piston ring assembly 300 is mounted on the outer peripheral surface of the piston assembly 200 in close contact with the inner wall of the cylinder 100 serves to maintain the airtight state of the combustion chamber 150.

In addition, the piston ring close contact 400 is embedded in the piston assembly 200, and when the pressure according to the explosion stroke is applied to the upper side of the piston assembly 200, the outer diameter increases and gives an adhesion to the piston ring assembly 300, When the pressure applied to the upper side of the piston assembly 200 is released according to the exhaust stroke, the outer diameter is reduced.

For this purpose, the piston ring close contact 400 is preferably mounted to communicate with the piston ring assembly 300.

The present invention can be applied to the embodiments described above, and the main part of the present invention will be described in more detail for the sake of more detailed description.

As described above, the cylinder 100 is provided with a combustion chamber 150 to provide a space in which the piston assembly 200 reciprocates, and a structure in which the bottleneck ring 140 of FIG. 1 is formed may be applied.

That is, the bottleneck ring 140 protrudes along the inner circumferential surface of the combustion chamber 150 between the top dead center 151 and the bottom dead center 152 and has an inner diameter corresponding to the outer diameter of the piston assembly 200, and the piston according to the explosion stroke. It temporarily serves to amplify the exhaust pressure of the combustion gas in the combustion chamber 150 in the exhaust stroke while delaying the movement to the bottom dead center 152 side of the assembly 200.

Looking at the bottleneck ring 140 in more detail with reference to FIG. 1, the first inclined surface 142 which is inclined downward toward the bottom dead center 152 side of the combustion chamber 150 at the upper side edge of the bottleneck ring 140. The second inclined surface 144 is formed at a lower edge of the bottleneck ring 140 to incline upward toward the top dead center 151 side of the combustion chamber 150.

Accordingly, the piston assembly 200 may be temporarily delayed in movement toward the bottom dead center 152, and may be guided along the first inclined surface 142 when initially contacted with the bottleneck ring 140 and the bottleneck ring 140. After passing through the bottom dead center 152 and then to the top dead center (151) it will be guided by the second inclined surface (144).

In addition, it is preferable that the natural exhaust port 160 for naturally exhausting the combustion gas in the combustion chamber 150 passes through the cylinder 100 so as to face each other at the lower side of the bottleneck ring 140.

The natural exhaust port 160 allows the cylinder 100 to balance the pressure by allowing a part of the exhaust gas in the combustion chamber 150 to be naturally discharged during the exhaust stroke when the piston assembly 200 is located at the bottom dead center 152 after the explosion stroke. It is a means for preventing the inclination to one side.

Here, the natural exhaust port 160 is preferably connected to the discharge pipe 170 as shown so that the exhaust gas is discharged to the communication (not shown) side after the explosion stroke.

Meanwhile, the piston assembly 200 reciprocates between the top dead center 151 and the bottom dead center 152 of the combustion chamber 150 as described above, and the first piston case 210 as illustrated in FIGS. 2 to 5. It can be seen that the structure including a) and the second piston case 220 and the communication slit 230.

For reference, FIG. 2 is a side cross-sectional conceptual view showing the overall structure of the first piston case 210, FIG. 3 is a side cross-sectional conceptual view showing the overall structure of the second piston case 220, and FIG. 4 is A of FIG. FIG. 5 is a bottom conceptual view illustrating the structure of the first piston case 210 viewed from a viewpoint, and FIG. 5 is a plan conceptual view illustrating the structure of the second piston case 220 viewed from a viewpoint B of FIG. 3.

As shown in FIGS. 2 and 4, the first piston case 210 is formed with at least one first groove 211 in which an upper part is sealed, a lower part is opened, and a piston ring assembly 300 is seated on an upper outer peripheral surface thereof. It is a part constituting the upper structure of the assembly 200.

As shown in FIGS. 3 and 5, the second piston case 220 is rotatably coupled to the connecting rod 500 at an upper portion thereof (see FIG. 1 below), and a piston ring at an upper side of the connecting rod 500. The through hole 221 to which the contact hole 400 is mounted is formed at the center portion, and is coupled to the first piston case 210 to form a lower structure of the piston assembly 200.

The communication slit 230 passes through a plurality of holes along the formation direction of the first groove 212 and communicates with the piston ring contact hole 400. Preferably, the communication slits 230 are formed along the direction of formation of the first groove 212. Try to be symmetrical throughout.

The communication slit 230 may be symmetrically formed so that the adhesion force by the piston ring fitting 400 to be described later may be uniformly transmitted to the piston ring assembly 300.

As described above, the piston assembly 200 is formed by coupling the first piston case 210 and the second piston case 220 to each other to form an integrated body. The first coupling surface 212 and the second coupling surface 222 are integrally formed. ) Are in contact with each other to seal the inside of the first and second piston cases (210, 220).

The first coupling surface 212 is a portion formed stepped along the inner peripheral surface of the lower side of the first piston case 210 as shown in Figure 2, the second coupling surface 222 is the second piston case 220 as shown in FIG. Stepped along the outer peripheral surface of the upper side is to be in contact with the first coupling surface.

At this time, the first coupling surface 212 may be applied to the structure by the mutual coupling of the hook protrusion 214 and the fastening groove 224 in order to maintain a firm fastening state with the second coupling surface 222. .

That is, the hook protrusion 214 is a plurality of protruding toward the second coupling surface 222 along the lower edge of the first coupling surface 212, as shown in Figures 2 and 4, preferably formed radially facing each other. 3 and 5, the fastening groove 224 has a structure in which a lower end of the guide groove 223 formed from the upper end to the lower end of the second coupling surface 222 corresponds to the hook protrusion 214.

Accordingly, the hook protrusion 214 is guided along the guide groove 223 and is fixed to the fastening groove 224 while the inside of the first and second piston cases 210 and 220 is sealed.

On the other hand, the piston ring assembly 300 is mounted on the piston assembly 200 as described above serves to maintain the airtight between the cylinder 100, as shown in Figure 6 compression ring 310 and the fixed clip 320 It can be seen that the structure including).

Compression ring 310 is provided in the piston assembly 200, more specifically, the first groove 211 of the first piston case 210 is provided with end portions 311 and 311 'facing each other, explosion stroke When the cylinder (100, see Fig. 1 below) close to the inner circumferential surface to maintain the airtight.

That is, the compression ring 310 is in close contact with the cylinder 100 side by increasing the outer diameter of the piston ring close contact 400 to be described later.

The fixed clip 320 is coupled from the outer edge of the compression ring 310 to grip the end portions (311, 311 ') and the outer surface is disposed on the same line as the outer surface of the compression ring 310 (see dotted line in Figure 6) As the end portions 311 and 311 'are opened, the compression ring 310 is prevented from being damaged.

The fixing clip 320 wraps the stepped surfaces 312 and 312 'which are stepped on the inner and outer circumferential surfaces of the end portions 311 and 311' from each of the end portions 311 and 311 'so as to be coupled to the compression rings 310. It can be seen that the structure including the cover piece 322 and the support piece 324 and the fixing piece 326 largely.

The cover piece 322 surrounds the step surface 312 of the outer circumferential surface of the compression ring 310 and the outer surface is disposed in the same manner as the outer circumferential surface of the compression ring 310 so that the piston assembly 200 does not interfere with the reciprocation along the inner circumferential surface of the cylinder 100. It is preferable.

The support piece 324 extends from the upper and lower edges of the cover piece 322 toward the first groove 211 and surrounds the upper and lower surfaces of the compression ring 310 including the end portions 311 and 311 '. will be.

Therefore, the auxiliary groove 215 on the first groove 211 such that the support piece 324 can be accommodated on the outer circumferential surface of the first piston case 210 by the height surrounding the upper and lower surfaces of the compression ring 310 as described above. Preferably, the auxiliary groove 215 is formed to be greater than or equal to the area of the support piece 324 added to the cover piece 322 to correspond to the external shape of the fixing clip 320 as a whole.

The fixing piece 326 extends to face each other from the edge of the support piece 324 to be in close contact with the stepped surfaces 312 and 312 'of the inner circumferential surface of the compression ring 310 to maintain a firm fastening force.

The fixed clip 320 may be manufactured in a block shape as shown, as well as a variety of modifications and applications, such as being able to be used to produce a clip shape that allows elastic deformation by bending a rigid wire, of course. .

Here, the piston ring assembly 300 is an oil ring 330 seated on the lower side of the compression ring 310, more specifically, the second groove 211 'formed along the outer peripheral surface of the lower side of the first groove 211. It is preferable to provide further.

In this case, the second groove 211 ′ may apply a structure in communication with the oil reduction hole 211 ″ (see FIGS. 1 and 2) so that the oil can descend to the crank case 600 side.

On the other hand, the piston ring close contact 400 is to give a close contact force to the piston ring assembly 300 as the outer diameter increases as described above, as shown in Figures 7 and 8 with the support rod 410 And it can be seen that the structure including the support bracket 420 and the central piece 430 and the elastic piece 440 and the close contact piece 450.

The support rod 410 is threaded along the outer circumferential surface and the lower end is screwed so that the height can be adjusted to the lower side of the piston assembly 200, that is, the second piston case 220.

Both ends of the support bracket 420 are fixed to the inner bottom surface of the second piston case 220, and the support nut 422 provided at the center portion is coupled to the support rod 410 to support the support rod 410 from the bottom. The role of appropriately supporting and supporting the action force according to the elastic deformation of the elastic piece 440 is also performed.

The central piece 430 is mounted between the pair of height adjustment nuts 432 and 432 'which are penetrated through the upper side of the support bar 410 and screwed to the support bar 410, and the elastic piece 440 to be described later extends. It is a part.

The support bar 410 is preferably coupled to the limit nut 433 which determines the lower limit of the lower end of the center piece 430 between the support nut 422 and the height adjustment nuts (432, 432 ').

The elastic piece 440 extends upward from the edge of the central piece 430 toward the inner circumferential surface of the piston assembly 200, that is, the first piston case 210 while being inclined upwardly as shown in FIG. 1. To form a convex circular arc toward, but a plurality of radially extending as shown in Figs. 7 and 8, the elastic member to allow elastic deformation while returning to the original while acting elastic resilience, such as a leaf spring.

The close contact piece 450 extends from both ends of the elastic piece 440 to both sides to form an arc shape corresponding to the inner circumferential surface of the first piston case 210. The outer edge of the close contact piece 450 is the piston ring assembly 300. In more detail, the inner circumferential surface of the compression ring 310 and the communication slit 230 are in contact with each other.

Therefore, the diameter of the imaginary circle formed by connecting both ends of the contact piece 450 is increased when the pressure according to the explosion stroke is applied to the upper side of the first piston case 210, and the piston assembly 300 according to the exhaust stroke. When the pressure applied to the upper side is released, it moves along the bidirectional arrow shown in FIG. 8 so as to decrease.

An operating state of the piston module for an internal combustion engine according to the present invention having the above configuration will be described with reference to FIGS. 9 to 11.

For reference, reference numerals not shown in FIGS. 9 to 11 refer to FIGS. 1 to 8.

When the intake valve 110 opens the flow path on the side of the inlet port 101 communicating with the combustion chamber 150, an intake stroke in which fuel flows into the combustion chamber 150 along an arrow direction occurs as shown in FIG. 9, and the pressure of the fuel flows in. As a result, the piston assembly 200 descends from the top dead center 151 to the bottom dead center 152.

Thereafter, when the fuel supply is completed, the intake valve 110 is closed, and as shown in FIG. 10, when the spark plug 130 ignites the fuel in the combustion chamber 150 and an explosion stroke occurs, the pressure corresponding to the explosion of the fuel is increased in the piston assembly 200. Is applied to the upper side of the

Here, the pressure due to the explosion of the fuel is the compression ring 310 as the outer diameter of the compression ring 310 seated in the first groove 211 through the first groove 211 of the first piston case 210 together with the combustion gas ( 310 is in close contact with the inner peripheral surface of the cylinder (100). That is, as shown in Figures 1, 6 and 7, respectively, the shape of the elastic piece 44 of the piston ring close contact 400 is formed in a structure inclined upward toward the edge from the center of the piston. Under this structure, when the pressure due to the explosion of the fuel is applied to the upper side of the piston assembly 200 during the explosion stroke, the elastic piece 44 of the piston ring close contact 400 temporarily receives a large force downward The elastic piece 440 of the piston ring close contact 400 inclined upward by the action of this force is the center portion is connected to the support rod 410, so that the close contact piece 450 on the end side is to be lowered. Since the force is momentarily further increased, the close contact piece 450 naturally occurs in the direction of moving in the direction of increasing the radius. At this time, since the contact pin 450 of the contact hole 400 is located inside the pressing ring 310 seated in the first groove 211 of the first piston case 210, the contact pin 450 has an outer diameter. When the movement in the direction of increasing pushes the outer compression ring 310 in the direction of increasing the outer diameter, the compression ring 310 is in close contact with the inner peripheral surface of the cylinder (100).

At this time, the elastic piece 440 of the piston ring close contact 400, while pushing the close piece 450 toward the inner circumferential surface side of the cylinder 100 gives a more strong adhesion to the pressing ring 310, thereby the combustion gas crank To prevent leakage to the case 600 side, the piston assembly 200 moves from the top dead center 151 to the bottom dead center 152.

Thereafter, the lower edge of the piston assembly 200 is in contact with the bottleneck ring 140 protruding from the inner circumferential surface of the cylinder 100 and the lowering motion is temporarily delayed.

Subsequently, the pressure exerted on the upper side of the piston assembly 200 is amplified by the bottleneck ring 140 so as to give a stronger exhaust pressure in the exhaust stroke according to FIG. 11.

Finally, when the exhaust valve 120 opens the flow path on the side of the exhaust port 102 in communication with the combustion chamber 150, an exhaust stroke is generated in which the exhaust gas is discharged from the combustion chamber 150, and the upper side of the piston assembly 200 is applied. As the pressure is released, the outer diameter of the compression ring 310 is also restored to its original size.

At this time, the elastic piece 440 is interlocked with the compression ring 310, the elastic restoring force is generated toward the center of the piston assembly 200, while the close contact member 450 also releases the adhesion force applied to the compression ring 310, at the same time the piston assembly ( 200 moves smoothly from the position of the bottom dead center 152 indicated by the dotted line to the top dead center 151.

As described above, it can be seen that the present invention has as its basic technical idea to provide a piston module for an internal combustion engine that can maintain a tight air tightness in a cylinder and amplify exhaust pressure due to an explosion stroke, thereby improving combustion efficiency and output. have.

Although embodiments according to the present invention have been described above, this is merely illustrative, and those skilled in the art may make the cylinder 100 according to an embodiment of the present invention longer than a cylinder of a general piston, ie, It is possible to apply to a long-stroke engine so that sufficient compression is achieved by increasing the distance between the bottom dead centers, and to apply it to a two-stroke engine or a three-stroke engine without a compression stroke. I will understand the point.

Accordingly, the true scope of the present invention should be determined by the following claims.

100 cylinder ... 101 air intake
102 Exhaust vent 110 Intake valve
120 ... exhaust valve 130 ... ignition plug
140 ... Bottle Ring 142 ... First Slope
144 ... 2nd slope 150 ... combustion chamber
151 ... Top Firm 152 ... Bottom Firm
160 ... Natural exhaust vents 200 ... Piston assembly
210 ... First piston case 211 ... First groove
211 '... Second Home 211 "... Oil Reduction Ball
212 ... First engagement surface 214 ... Hook projection
220 ... 2nd piston case 222 ... 2nd engagement surface
223 ... guide groove 224 ... fastening groove
230 ... Communication slit 300 ... Piston ring assembly
310 ... Compression ring 311, 311 '...
312, 312 '... Jut surface 320 ... Fixed clip
322 Cover Part 324 Support Part
326 ... Fix 330 ... Oiling
400 ... piston ring contact 410 ... support rod
420 Support Bracket 422 Support Nut
430 ... Center 432, 432 '...
433 ... limit nut 440 ... elastic
450 ... Contact 500 ... Connecting Rod
600 ... crankcase

Claims

cylinder;
A piston assembly reciprocating between a top dead center and a bottom dead center of the combustion chamber formed inside the cylinder;
A piston ring assembly mounted on an outer circumferential surface of the piston assembly in close contact with the inner wall of the cylinder and maintaining an airtight state of the combustion chamber; And
A piston ring contact hole which is built in the piston assembly and whose outer diameter increases when a pressure according to an explosion stroke is applied to the upper side of the piston assembly, and reduces the outer diameter when the pressure applied to the upper side of the piston assembly is released according to the exhaust stroke; Include,
The piston ring close contact,
A support rod having a thread formed along an outer circumferential surface thereof, the lower end of which being screwably adjustable to a lower side of the piston assembly;
Both ends are fixed to the inside of the lower side of the piston assembly and the support nut provided in the center portion is a support bracket which is penetrated with the support rod;
A central piece penetrated through an upper side of the support rod and mounted between a pair of height adjustment nuts screwed to the support rod;
A plurality of elastic pieces extending radially obliquely upward from an edge of the central piece toward an inner circumferential surface of the piston assembly, and an elastic piece having a convex arc shape toward an upper side of the cylinder;
It includes a contact piece extending in both sides from the end of the elastic piece to form an arc shape corresponding to the inner peripheral surface of the piston assembly,
The outer edge of the close contact piece is a piston module for an internal combustion engine having a structure in contact with the inner side of the piston ring assembly.

The method of claim 1,
The cylinder
Protrudes along the inner circumferential surface of the combustion chamber between the top dead center and the bottom dead center, has an inner diameter corresponding to the outer diameter of the piston assembly, and temporarily delays the movement to the bottom dead center side of the piston assembly according to the explosion stroke; The piston module for the internal combustion engine further comprises a bottleneck ring for amplifying the exhaust pressure of the combustion gas in the combustion chamber.

The method of claim 1,
The piston assembly includes:
A first piston case in which at least one first groove is formed in which an upper part is sealed and a lower part is opened, and at least one first groove in which the piston ring assembly is seated is formed;
A second piston case in which an upper part is opened and rotatably coupled to a connecting rod at a lower part, and the piston ring contact hole is mounted on an upper side of the connecting rod and is mutually coupled to the first piston case;
A piston module for an internal combustion engine comprising a plurality of communication slits penetrating through the plurality of grooves along the forming direction of the first groove and communicating with the piston ring close contact.

The method of claim 1,
The piston ring assembly,
Compression rings are provided in each of the first groove is provided in the at least one groove provided along the outer peripheral surface of the upper side of the piston assembly, the end portions facing each other;
A fixed clip coupled from an outer edge of the compression ring to hold the end portion and having an outer surface disposed on a circular arc such as an outer edge of the compression ring,
The compression ring is a piston module for an internal combustion engine is in close contact with the cylinder side by increasing the outer diameter of the piston ring close contact.

delete

3. The method of claim 2,
A first inclined surface that is inclined downward toward the bottom dead center of the combustion chamber at an upper side edge of the bottleneck ring;
The lower side edge of the bottleneck ring piston module for an internal combustion engine is further provided with a second inclined surface inclined upward toward the top dead center side of the combustion chamber.

3. The method of claim 2,
The cylinder
Piston module for an internal combustion engine through the natural exhaust port for natural exhaust of the combustion gas in the combustion chamber on the lower side of the bottleneck ring facing each other.

The method of claim 3, wherein
The piston assembly includes:
A first engagement surface formed stepped along an inner peripheral surface of the lower side of the first piston case,
A second engaging surface formed stepped along the upper outer peripheral surface of the second piston case to be in contact with the first engaging surface;
A plurality of hook protrusions protruding toward the second coupling surface along the lower edge of the first coupling surface;
A guide groove formed from an upper end portion to a lower end portion of the second coupling surface corresponding to the hook protrusion;
It includes a fastening groove recessed to correspond to the hook projection on the lower end of the guide groove,
The hook protrusion and the fastening groove are mutually coupled to each other, the internal combustion engine piston module for the first and the second piston case is sealed.

5. The method of claim 4,
The piston ring assembly,
A stepped surface is formed to be stepped on the inner and outer circumferential surfaces of the compression ring from each of the end portions in a direction in which the compression ring is formed.
The fixed clip is a piston module for an internal combustion engine surrounding the upper and lower surfaces of the stepped surface and the compression ring.

5. The method of claim 4,
The piston ring assembly,
And an oil ring seated in a second groove provided along an outer circumferential surface of the piston assembly on a lower side of the compression ring.

The method of claim 9,
The fixing clip includes:
A cover piece in contact with the stepped surface of the compression ring outer circumferential surface and disposed on the same line as the outer circumferential surface of the compression ring;
A support piece extending from the upper and lower edges of the cover piece to be in contact with the upper and lower surfaces of the compression ring;
A piston module for an internal combustion engine including a fixing piece extending opposite to each other from the edge of the support piece in contact with the stepped surface of the inner peripheral surface of the compression ring.