KR20010047684A - Lubrication device of internal combustion engine - Google Patents

Abstract

PURPOSE: A device for lubricating an internal combustion engine is provided to prevent the lubrication oil for reducing the friction resistance of friction portions due to the reciprocation motion of pistons from being introduced into a crank chamber. CONSTITUTION: A device for lubricating an internal combustion engine includes a crank case(100) formed with a first lubrication oil injection path(102) and a first lubrication discharge path(104) respectively penetrating a main bearing(120), a first supply flow channel(202) and a first discharge flow channel(204) respectively penetrating a crank arm(220) having a crank journal(210) and a balance weight(230) and a crank pin(240) to be communicated to the lubrication oil injection path and the first lubrication discharge path, a connecting rod(300) formed with a second supply flow channel(302) and a second discharge flow channel(304) respectively penetrating large and small diameter parts(310,330) to be communicated with the first supply and the first discharge flow channels, a piston(400) formed with a third supply flow channel(402) and a third discharge flow channel(404) respectively communicated with the second supply and discharge flow channels at a side of the piston and adjacent to an inner wall of a cylinder case(600) at the other side of the piston, and a piston formed with a circulation groove(502) on an outer periphery to be communicated with the third supply and discharge flow channels, wherein the journal lubrication grooves(212,214) and pin lubrication grooves(242,244) are formed on outer peripheral surfaces of the crank journal and the crank pin to be penetrated by the first supply and discharge flow channels.

Description

Lubricator of internal combustion engine {.}

The present invention relates to a lubrication device of an internal combustion engine that supplies lubricating oil to reduce frictional resistance to frictional portions generated by reciprocating motion of a piston. In particular, the lubricating oil supplied to the frictional portion is not collected inside the crank chamber. The present invention relates to a lubrication device of an internal combustion engine flowing through a crankcase exterior.

In general, an internal combustion engine converts thermal energy generated by a reciprocating motion of a piston into kinetic energy to perform mechanical work.

This internal combustion engine supplies lubricating oil to the frictional part acting as a resistance element for the efficiency of the force obtained in the expansion stroke of the cylinder.

In other words, the cylinder, the piston, the crankshaft, the connecting rod, etc. form a friction surface in the cycle of generating power as the piston moves up and down, and the friction surface includes gamma, cooling, sealing, buffering, antirust, and creation. Lubricant is supplied for

However, in the lubrication apparatus of the conventional internal combustion engine, the lubricating oil supplied to each frictional part such as lubrication between the cylinder and the piston and lubrication between the crankshaft is collected in the oil pan, which is a collecting means installed in the lower part of the crank chamber through the side wall of the crankcase. Accordingly, the problem of lowering combustion performance is reduced by supplying a lubricating oil, which is reduced to the intake manifold and re-burned by the pressure difference between the crank chamber and the supercharged mixer or air, which flows down the crank chamber or flows down through the crank chamber sidewall, to the sealer cylinder. there was.

The present invention has been made in order to solve the above problems, and an object of the present invention is to provide a lubricating oil return path through the outside of the crank chamber in order to reduce frictional resistance to frictional portions generated by the reciprocating motion of the piston. It is to provide a lubrication device of the internal combustion engine to prevent the mixing of lubricating oil in the crank chamber by having a flow path structure that is resupply after the possible.

1 is a sectional view showing the main parts of a structure of an internal combustion engine to which a lubricating device of the present invention is applied;

Figure 2 is a side view showing the main part of the configuration of the crankshaft system applied to the internal combustion engine lubricator of the present invention,

3 and 4 are a side view and a perspective view of a separated state showing a detailed configuration of the crankshaft system of FIG.

5 and 6 are diagrams of the use state showing the arrangement of the flow path of the crankshaft system and the connecting rod applied to the internal combustion engine of the present invention,

5 is a view showing a flow path arrangement in a state where the piston is located at the top dead center;

6 is a view showing a flow path arrangement in a state where the piston is located at the bottom dead center;

7 is a plan sectional view of the cylinder case showing the piston lubrication path of the present invention;

8 is a cross-sectional view of a main portion of a lower structure of the crankcase of the present invention;

Explanation of symbols on the main parts of the drawings

100: crankcase 102: lubricating oil injection furnace 104: lubricating oil discharge furnace

10: crankcase 120: main bearing 130: collection ball

200: crankshaft 202: first supply passage 204: first discharge passage

210,215: Crank journal 212: Journal lubrication groove 216: Journal foreign material removal groove

220: crank arm 240: crank pin 242,244: pin lubrication groove

246,248: pin foreign material removal groove 250: blocking cover 260; Guide cover

300: connecting rod 302: second supply passage 304: second discharge passage

400: piston pin 402: third supply passage 404: third discharge passage

500: piston 502: circulation groove

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 1 to 8.

In the drawings, the present invention is divided into upper and lower parts having a cylinder case 600 in the upper portion of the crank chamber 110, and the main bearing 120 is fitted to both sides forming the crank chamber 110. The crankcase 220 having a crank journal 210 and a balance weight 230 supported by the crankcase 100 penetrating the crankcase 100 and the main bearing 120 fitted to both sides of the crankcase 100 is centered on the crank pin 240. Small diameter portion having a large diameter portion 310 and a piston bearing 340 having a crank shaft 200 integrally provided on both sides, a crank bearing 320 for supporting the crank pin 240 of the crank shaft 200 ( Piston pin 400 for connecting the connecting rod 300 to the piston 500 while being supported by the connecting rod 300 having the 330, the connecting rod 300, the piston bearing 340 of the small diameter portion 330 Including, the piston 500 and the crankshaft in the airtight state is maintained during the movement of the members ( It provides a configuration of the path to the supply and discharge of lubricant to the system.

The path for supplying and discharging the lubricating oil to the piston 500 forms a lubricating oil injection passage 102 and a lubricating oil discharge passage 104 which penetrate the main bearing 120 through both sides of the crankcase 100. A first supply passage 202 passing through the crank arm 220 and the crank pin 240 having the balance weight 230 and the crank pin 240 and communicating with the lubricating oil injection path 102 about the crank pin 240; A first discharge passage 204 is formed in communication with the lubricant discharge passage 104. In addition, the second supply passage 302 and the second supply passage 302 communicating with the first supply passage 202 through the large diameter portion 310 and the small diameter portion 330 of the connecting rod 300, including the bearings 320 and 340. A second discharge passage 304 is formed in communication with the first discharge passage 204. In addition, the third supply passage 402, one side of the piston pin 400 communicates with the second supply passage 302 and the second discharge passage 304 and the other side penetrates adjacent to the inner wall of the cylinder case 600. And a circulation groove 502 which forms a third discharge passage 404 and connects the third supply passage 402 and the third discharge passage 404 in series with each other by surrounding the outer circumferential surface of the piston 500 as shown in FIG. 7. ).

The lubricating oil supply and discharge of the piston 500 is continuously made at the same time as the lubrication of the crankshaft 200, the crank journal 210 and the outer circumferential surface of the crank journal 210 including a path for making and supplying the lubricating oil of the piston 500. Journal lubrication grooves 212 and 214 and pin lubrication grooves 242 and 244 through which the first supply passage 202 and the first discharge passage 204 pass are formed on the outer circumferential surface of the fin 240.

In this configuration, the crankcase 100 is provided with a protruding inlet 170 and outlet 180 in communication with the lubricating oil inlet 102 and the lubricating oil outlet 104 on the outer surface, the inlet 170 and outlet 180 is connected to the circulation path to the storage source of the lubricating oil (not shown), the pressure pump is installed to the injection port 170 side to the circulation path and the filter filter is installed on the outlet 180 side. In addition, as shown in FIG. 8 in the inner wall of the crankcase 100 to prevent the lubricating oil from scattering due to the collision with the crank journal 210, the inner diameter is protruded with respect to the outer diameter adjacent to the outer diameter of the crank journal 210. The opening forms a shatterproof groove 190.

And the foreign matter of the pin intersecting each of the pin lubrication grooves 242, 244 to the crank pin 240, as shown in detail in Figures 5 and 6 to facilitate the flow of lubricating oil including the foreign matter supplied to the crank pin 240 The removal grooves 246 and 248 are formed, and the connection grooves 322 connecting the pin foreign matter removal grooves 246 and 248 to the crank bearing 320 are formed.

In addition, the journal foreign material removal groove 216 leading to the branched state from the journal lubrication grooves 212 and 214 is formed in the crank journal 210 to facilitate the flow of lubricating oil including foreign substances supplied to the crank journal 210.

In addition, as shown in FIG. 2 to FIG. 4, the lubricating oil leaked during the lubrication process of the crank pin 240 and the piston 500 is discharged to the outside of the crankcase 100 in a state where scattering is prevented. Forming the receiving groove 254 to accommodate the outer diameter at a predetermined interval to form a partition cover blocking plate 250 fastened to the crank arm 220, the blocking cover 250 and the balance weight 230 and the crank arm 220 Guide plate 260 is fastened to be in close contact with the inner wall of the crankcase 100 while accommodating the entire outer diameter, and has a collecting port 130 connected to the check valve 140 under the crankcase 100. In addition, a through hole 254 is formed in the blocking cover 250 to form an open discharge hole 256 facing the inner wall of the guide cover 260, and the discharge hole 256 in the inner wall of the guide cover 260. While forming the guide groove 264 facing the guide groove 264 in the lower portion to penetrate through the guide groove 264 The inner hole 266 is formed.

In this case, the blocking cover 250 is coupled to the blocking cover 250 and the crank arm 220 by forming the screw holes 222 and 252 to be fastened with the screws 20, and the coupling of the guide cover 260 is performed. The boss 262 is formed on the outer circumferential surface and is screwed to the support surface.

In addition, the check valve 140 is connected to the collecting tank 160 through the collecting pipe 150. The main collecting pipe 150 is connected to the intake manifold by branched branch pipes 152.

And the blocking cover 250 is made of a relatively light weight body relative to the balance weight 230, including the balance weight 230 so as to reduce the rotational resistance of the crankshaft 200 to form an overall circular shape, but in such a shape It is not limited.

On the other hand, the oil seal 10 is fitted to the main bearing 120 and the piston bearing 340 for airtightness on both sides, and two gas sealing rings on the upper surface of the piston 500 are centered on the circulation groove 502. The oil sealing ring 520 is fitted to the lower portion, that is, adjacent to the skirt, while the 510 is fitted.

Referring to the operation of the present invention by the above configuration as follows.

First, the present invention is a crankshaft 200 supported by the main bearing 120 fitted to both sides of the crankcase 100 is connected to the connecting rod 300 to connect the linear power by the lifting and lowering of the piston obtained by the expansion stroke (connecting rod ( Through 300) is converted into rotational force, and the lubricant is supplied to the friction part generated in this process.

The supply of lubricating oil flows into the journal lubrication groove 212 of the crank journal 210 through the lubricating oil injection path 102 and the lubricating oil pushed through the injection port 170 from the lubricating oil storage source and the rotating crank journal 210. While lubricating the main bearing 120, it is pumped to the pin lubrication groove 242 of the crank pin 240 through the first supply passage 202 to lubricate the crank pin 240 and the crank bearing 320 which are the rotating bodies. .

Thereafter, the lubricating oil is pressurized to the outer circumferential surface of the piston 500 along the second supply passage 302 of the connecting rod 300 and the third supply passage 402 of the crank pin 240 to communicate with the circulation groove 502. The lubrication of the piston 500 while flowing into the third discharge passage 404 of the piston pin 400.

The lubricating oil introduced into the third discharge passage 404 flows into the pin lubrication groove 244 of the crank pin 240 through the second discharge passage 304 of the connecting rod 300 and then the first discharge passage 204. The crank journal 210 is pressed into the journal lubrication groove 214 of the crank journal 210 to lubricate the crank journal 210 and the main bearing 120 in the discharge path.

Since the lubricating oil is discharged to the outside of the crankcase 100 through the lubricating oil discharge path 104 and collected into the lubricating oil storage source through the outlet 108, the foreign matter is removed by the filter.

On the other hand, the discharge of the foreign matter contained in the lubricant supplied to the crank journal 210, which is the friction part, the journal foreign matter removal groove 216 is the first discharge passage 204 the journal foreign matter removal groove 216 during the rotation of the crank journal 210 is rotated. And the journal lubrication grooves 212 and 214 in communication with the first discharge passage 204.

And the discharge of the foreign matter contained in the lubricating oil supplied to the crank pin 240, which is a friction portion, pins formed in the connection groove 322 and the crank pin 240 formed in the crank bearing 320 is a fixed body as shown in FIG. In the state where the foreign matter removing grooves 246 and 248 are not in communication, the connection groove 322 and the pin foreign matter removing grooves 246 and 248 are stagnated, and as shown in FIG. When 322 and the pin foreign matter removal grooves 246, 248 are in communication with each other it is possible to be discharged to the first discharge passage (204).

Meanwhile, the lubricating oil leaking during the lubrication process of the crank pin 240 is accommodated in the receiving groove 254 of the blocking cover 250 and is discharged through the discharge hole 256 formed in the receiving groove 254 by centrifugal force, and then fixed. After flowing down along the guide grooves 264 of the chain guide cover 260, the oil is dropped into the lower part of the crankcase 100 along the guide hole 266. The dropped lubricant includes the mixed gas through the collecting hole 130. The check valve 140, which is prevented from backflow, is collected to the collecting tank 160 along the collecting pipe 150. At this time, in the process of collecting oil into the collecting tank, the mixed gas is introduced into the intake manifold through the branch pipe 152.

In addition, the lubricating oil adjacent to the crank journal 210 of the lubricating oil flowing along the inner surface of the crank chamber 110 rides on the outer circumferential surface of the guide cover 260 to the lower part of the crankcase 100 while being blocked by the guide cover 260. Flow down.

In this case, a gap is generated between the guide cover 260 and the crankcase 100, and the lubricating oil flowing therethrough is led to the lower part of the crankcase 100 along the shatterproof groove 190.

Therefore, in the present invention, lubricating oil is supplied to the frictional portion generated in the process of converting the linear power caused by the lifting and lowering of the piston obtained by the expansion stroke of the cylinder into the rotational force through the connecting rod. This prevents the mixing of the lubricating oil in the charging process of the mixed gas and atmospheric air through the crank chamber, there is an effect that the charging effect is increased.

In addition, the oil pan, which is a conventional means for collecting lubricating oil by the circulation path through the crankcase outside, is excluded, and thus, there is an advantage in that the internal combustion engine is lighter in size and lighter in structure.

Claims (6)

The crankshaft supported by the main bearings fitted on both sides of the crankcase is connected to the connecting rod to supply lubricant to the frictional part generated by converting the linear power of the piston obtained by the expansion stroke of the cylinder into the rotating force through the connecting rod. In the lubricator, The crankcase 100 formed to communicate with the outside of the lubricant injection passage 102 communicating with the inner surface of the main bearing 120 on one side and the lubricant discharge passage 104 communicating with the inner surface of the main bearing 120 on the other side, The crank pin 240 penetrates through the crank arm 220 and the crank pin 240 having the crank journal 210 and the balance weight 230 supported by the main bearing 120 fitted to both sides of the crankcase 100. Crank shaft 200 having a first supply passage 202 communicating with the lubricating oil injection passage 102 and a first discharge passage 204 communicating with the lubricating oil discharge passage 104, Including a large diameter portion 310 having a crank bearing 320 and a small diameter portion 330 having a piston bearing 340 and bearings 320 and 340 supporting the crank pins 240 of the crank shaft 200. A connecting rod 300 penetrating and forming a second supply passage 302 communicating with the first supply passage 202 and a second discharge passage 304 communicating with the first discharge passage 204; One side is in communication with the second supply passage 302 and the second discharge passage 304 while being supported by the piston bearing 340 of the small diameter portion 330 of the connecting rod 300 and the other side of the cylinder case 600. A piston pin 400 having a third supply passage 402 and a third discharge passage 404 penetrating adjacent to an inner wall thereof, The lubricating oil discharged through the third supply passage 402 of the piston pin 400 flows through the third supply passage 402 and the third discharge passage 404 in a circumferential surface so as to flow into the third discharge passage 404. Equipped with a piston 500 having a circulation groove 502 to discharge the lubricating oil after lubrication of the piston 500 is discharged to the outside of the crankcase 100, The first supply passage 202 and the first supply passage 202 and the outer circumferential surface of the crank pin 240 so that the lubricating oil supply and discharge of the piston 500 is continuously made simultaneously with the lubrication of the crankshaft 200. A lubrication apparatus for an internal combustion engine, characterized in that the discharge passage 204 is formed through the journal lubrication grooves (212) (214) and the pin lubrication grooves (242, 244). The method of claim 1, Receiving groove for accommodating the outer diameter of the crank pin 240 at regular intervals so that the lubricating oil leaked during the lubrication process of the crank pin 240 and the piston 500 is discharged to the outside of the crankcase 100 in a state of preventing scattering ( 254 to form a blocking cover 250 which is a split body which is fastened to the crank arm 220, the blocking cover 250 and the crankcase in a state accommodating the outer diameter of the entire balance weight 230 and the crank arm 220 ( 100 is provided with a guide cover 260 which is fastened to be in close contact with the inner wall, and a collecting port 130 connected to the check valve 140 in the lower part of the crankcase 100, the receiving cover (250) A discharge hole 256 is formed to penetrate through 254 to face the inner wall of the guide cover 260, and a guide groove 264 is formed on the inner wall of the guide cover 260 to face the discharge hole 256. Internal combustion characterized in that the guide hole 266 formed in the lower portion so as to penetrate the guide groove 264 together with The lubricating device. The method of claim 2, Blocking cover 250 is made of a relatively light weight body relative to the balance weight 230, including the balance weight 230 so that the rotational resistance of the crankshaft 200 to form a circular shape as a whole characterized in that the configuration Lubrication of the engine. The method according to claim 1 or 2, Scattering prevention grooves 190 having an inner diameter protruding to the outer diameter of the crankcase 210 adjacent to the outer diameter of the crankcase 100 on the inner wall of the crankcase 100 so as to prevent scattering of the lubricant due to the collision with the crank journal 210. Lubrication device of an internal combustion engine characterized in that the configuration). The method of claim 1, Fin foreign matter removal grooves 246 and 248 intersecting each of the pin lubrication grooves 242 and 244 are formed in the crank pin 240 to facilitate the flow of lubricating oil including foreign substances supplied to the crank pin 240. , Crank bearing 32, the lubrication apparatus of the internal combustion engine, characterized in that the formation of the connection groove 322 connecting the pin foreign matter removal grooves (246, 248). The method of claim 1, In order to facilitate the flow of lubricating oil including foreign substances supplied to the crank journal 210, the journal foreign material removal groove 216 is formed in the crank journal 210 to be branched from the journal lubrication grooves 212 and 214. Lubrication device of an internal combustion engine characterized in that.