KR20080054490A - Apparatus supplying oil for cooling piston - Google Patents

Abstract

An oil supply apparatus for cooling a piston is provided to raise the cooling efficiency of a piston by properly injecting lubrication oil to cool the piston when heat is excessively transferred to the piston. An oil supply apparatus for cooling a piston comprises a balance weight(200) compressed as a connecting rod is driven. A pressure-forming member forms an oil injection pressure as the balance weight is compressed. An oil injection member(330) is integrally formed with the pressure-forming member to inject oil to an oil gallery by the oil injection pressure. The pressure-forming member includes a push rod(210), a first plunger(220) integrally formed with the push rod, a first spring(230) elastically supporting the first plunger, a first cylinder(240), an oil pipe(250), a second cylinder(260), a second plunger(270) and a second spring(280). The first plunger slides in the first cylinder.

Description

Apparatus supplying oil for cooling piston

1 is an overall configuration diagram of an oil supply device for cooling a conventional piston;

2 is an overall configuration diagram of an oil supply device for cooling the piston according to the present invention;

3 is an operation start view when spraying the oil injection means of the present invention,

Figure 4 is an operation start when the oil spray means uninjected of the present invention.

<Description of the symbols for the main parts of the drawings>

200: balance weight 210: push rod

220: first plunger 230: first spring

240: first cylinder 250: oil pipe

290: inlet 300: outlet

The present invention relates to an oil supply device for cooling the piston, and in particular, oil is supplied to the oil injection means by contacting the balance weight of the crankshaft and the push rod, so that the oil injection time, the injection speed and the injection period of the piston oil injection means. It relates to an oil supply device for cooling the piston in which the optimization is made.

Generally, according to the type of fossil fuel used in automobiles, when gasoline is used, gasoline engine is used, and when diesel is used, it is divided into a diesel engine. Both engines inject fuel into a piston installed to operate up and down on a cylinder block. By exploding by ignition with a spark plug to expand at a high temperature, the exploding gas moves the piston downward to drive the vehicle through the power transmission device through the connecting rod.

At this time, the instantaneous temperature of the explosive gas pushing the piston reaches thousands of degrees, and when the high temperature heat is applied to the piston for a long time, the piston is plastically deformed, distorted by heat, and fails to move up and down properly. In the case of a diesel engine, an oil gallery in which oil may move may be formed in a diesel engine to prevent the piston from overheating.

1 is an overall configuration diagram of an oil supply device for cooling a conventional piston.

As shown in Figure 1, the configuration of the device for supplying oil to the oil gallery is supplied from the main gallery 100 formed in the block of the engine, and the oil pump 110 protruding to one side of the main gallery (100) It is composed of an oil injection means 140 for supplying oil to the oil gallery 130 formed on the bottom of the piston (120).

When the diesel engine is operated in such a configuration state, the piston 120 in the engine block is operated up and down, and the main gallery 100 is opened by the oil pump compressed from the oil pump 110 which has received this operation. Since the oil is supplied through the oil injection means 140 at a high speed, the oil is injected at a high speed so that the oil is supplied to the oil gallery 130 of the piston 120 to prevent the piston 120 from overheating. .

However, according to the conventional oil supply method, when the piston 120 moves upward at a high speed, the oil supplied at high speed to the oil injection means 140 through the main gallery 100 may be the piston 120. There is a problem that the piston 120 is overheated because the oil is not properly supplied to the oil gallery 130 of the piston 120 because it does not follow the upward operation of the.

In addition, since the oil cooling jet 140 is installed in the main gallery 100, the capacity of the oil pump 110 may not be increased to compensate for oil consumption by the oil injection means 140, and the main gallery 100 may not be increased. The amount of oil uniformly supplied from) is not easy to control the amount of oil required for efficient cooling of the piston 120 according to the stroke of the cylinder.

Therefore, the conventional oil supply device has a problem that it is impossible to increase the injection amount of oil in the compression, explosion process that requires further cooling of the piston.

Therefore, the present invention has been invented to solve the above-mentioned problems, and the push rod and the first plunger are lowered by the compression of the balance weight during oil injection, so that the compressed oil in the first cylinder moves to the second cylinder through the oil pipe. As a result, the second plunger is raised by the compressed oil in the second cylinder so that the lubricating oil on the upper part of the second plunger is supplied to the piston oil spraying means, and when the oil is not sprayed, the first and second plungers are restrained by the restoring force of the first and second springs. The purpose of the present invention is to provide an oil supply device for cooling the piston by optimizing the oil injection time, the injection speed, and the injection period of the piston oil injection means by moving the inlet through the inlet.

An oil supply device for cooling a piston, comprising: a balance weight (200) compressed by driving of a connecting rod; Pressure forming means for forming an oil injection pressure by compression of the balance weight; The oil supply device for cooling the piston, characterized in that the oil injection means 330 is formed integrally with the pressure forming means is injected into the oil gallery by the injection pressure.

In a preferred embodiment, the push rod is moved by the compression of the balance weight; A first plunger integrally formed with the push rod and moving in the same direction as the push rod; A first spring elastically supporting the first plunger at a lower end of the first plunger; A first cylinder on which a lower end of the first spring is fixed and the first plunger slides; An oil pipe penetrated to move the compressed oil outward of the first cylinder; A second cylinder formed through one end of the oil pipe; A second plunger slid by the compressed oil in the second cylinder; The second plunger is elastically supported, characterized in that consisting of a second spring fixed to the upper end of the second cylinder.

In another preferred embodiment, the second cylinder is characterized in that the inlet port is supplied with lubricating oil when the second plunger is lowered by the restoring force of the second spring on the side wall.

In another preferred embodiment, the second cylinder is characterized in that the discharge port is discharged to the lubricating oil to the oil injection means in the upper portion.

This makes it possible to easily set the appropriate injection oil amount and injection pressure for cooling the piston, and realize optimization of the oil injection timing and injection period of the piston cooling jet.

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

2 is an overall configuration diagram of an oil supply device for cooling the piston according to the present invention.

As shown in FIG. 2, the first plunger 220 lowers the elastic force of the first spring 230 by the operation of the balance weight 200, and the pressure oil 310 filled in the first cylinder 240. ) Is moved to the second cylinder 260 by the pressure of the first plunger 220 to transfer the second plunger 270, so that the lubricating oil 320 in the second cylinder 260 is discharge port 300 It is discharged to the oil injection means 330 through.

Hereinafter, the configuration of an oil supply device for piston cooling in which efficient piston cooling is performed by two cylinders will be described one by one.

The balance weight 200 is formed in a cam type and is designed to maximize the instantaneous compression speed of the oil supply piston in the vicinity of the top dead center (TDC).

Here, when the piston 350 reaches the top dead center in the cylinder (TDC), the amount of heat transfer to the piston head due to combustion increases rapidly. The injection period is controlled.

The push rod 210 is formed at the lower end of the balance weight 200 and is integrally formed with the first plunger 220.

Here, when oil injection is required in the oil injection means 330, the push rod 210 moves downward by compression of the balance weight 200, and the first spring 230 when the oil injection means 330 is not sprayed. By the restoring force of the push rod 220 is moved upward.

The first plunger 220 is integrally formed at the bottom of the push rod 210 and moves together with the push rod 210.

Here, by lowering the push rod 210, the first plunger 220 is lowered to overcome the elastic force of the first spring 230, by applying a pressure to the compressed oil 310 filled in the first cylinder (240). The compressed oil moves to the second cylinder 260 through the oil pipe 250.

One end of the first spring 230 is coupled to the bottom of the first plunger 220, and the other end is coupled to the bottom of the first cylinder 240.

Here, when the first plunger 220 is lowered, the first spring 230 is compressed, and when the balance weight 200 is not compressed, the first spring 230 is restored and the first plunger 220 is raised. do.

In the first cylinder 240, the first plunger 220 is slid inside, and the compressed air 310 is filled between the first plunger 220 and the first cylinder 240.

Here, the compression area of the first cylinder 240 is larger than the compression area of the second cylinder 260, and the compression ratio is designed so that sufficient injection pressure is applied to the oil injection means 330.

The oil pipe 250 is formed through one side of the first cylinder 240, and the compressed oil moves from the first cylinder to the second cylinder by the lowering of the first plunger 220.

The second cylinder 260 is formed through one end of the oil pipe 250, the second plunger 270 is slid in the interior, the second plunger 270 is coupled to one end of the second spring (280) do.

One end of the second spring 280 is coupled to the upper portion of the second cylinder 260, and the other end is coupled to the second plunger 270.

 Here, the compressed oil flows into the second cylinder 260 through the oil pipe 250 during the oil spraying of the oil spraying means 330, and the second plunger 270 is the elastic force of the second spring 280 by the compression. To move upward.

In addition, when the oil injection means 330 is unsprayed, the compressed oil flows into the first cylinder 240 by the rising of the first plunger 220, and the second plunger 270 is loaded by the restoring force of the second spring. Move in the direction of

The inlet 290 is formed outside the second cylinder 260, the lubricating oil 320 in the oil pan 340 by the lowering of the second plunger 270 when the oil injection means 330 is not sprayed It is sucked into the second cylinder 260 through the inlet 290.

Here, the oil surface of the oil pan 340 is formed higher than the upper end of the second cylinder 260 to facilitate the introduction of lubricating oil into the space in the second cylinder 260.

The discharge port 300 is formed on the upper end of the second cylinder 260, the lubricating oil 320 is transferred to the oil injection means 330 through the discharge port by the rise of the second plunger 270, the piston 350 By spraying into the oil gallery 370 formed in the cooling of the piston is made.

3 is an operation start diagram when the oil injection means is sprayed according to the present invention, and FIG. 4 is an operation start view when the oil injection means is not sprayed according to the present invention.

As shown in FIG. 3, when the piston 350 is located at the top dead center of the cylinder, the balance weight 200 is compressed in the direction of the push rod 210 by the connecting rod 360 and the first plunger 220. ) Overcomes the elastic force of the first spring 230 by the lowering of the push rod 210 and moves downward.

Accordingly, the compressed oil 310 filled in the first cylinder 240 moves to the second cylinder 260 along the oil pipe 250 and the compressed oil 310 flows into the second cylinder 260. Accordingly, the second plunger 270 is raised to overcome the elastic force of the second spring 280, so that the lubricating oil 320 on the upper portion of the second plunger 270 is discharged through the oil outlet 330. Sprayed into.

Here, the space between the first cylinder 240 and the second cylinder 260 is formed in a state where the compressed oil 310 is sealed, and when the oil injection means 330 is injected, the second plunger 270 is an inlet of the lubricating oil. Prevents lubrication oil from entering and closing the product.

As shown in FIG. 4, the first plunger 220 and the push rod 210 move upward by the first spring 230 when the piston oil spraying means 330 is not sprayed, and the compressed oil 310 is moved upward. The second cylinder 260 moves from the first cylinder 240 to the second cylinder 260 through the oil pipe 250 to fill the empty space inside the second cylinder 260.

Thus, the second plunger 270 is lowered to the inlet 290 by the restoring force of the second spring 280, the lubricating oil 320 from the oil pan 340 through the inlet 290 through the second cylinder 260 Inhaled).

Here, the injection time, injection speed, and injection period of oil are adjusted according to the cam shape of the balance weight 200, and the injection oil amount and injection pressure are adjusted according to the oil capacity in the cylinder and the compression ratio of the first and second plungers.

As described above, the vibration reduction device of the purge control solenoid valve according to the present invention provides the following effects.

First, the cost and power loss are reduced by reducing the capacity of the conventional oil pump,

Second, the design of the balance weight optimizes the oil injection timing, injection speed and injection period of the piston cooling jet.

Third, it is easy to set the injection oil amount and the injection pressure for cooling the piston according to the compression ratio of the first and second plungers and the oil amount in the cylinder,

Fourth, the fuel efficiency is improved by reducing the power loss, the appropriate lubricating oil is injected when the heat transfer excessively to the piston, thereby improving the cooling efficiency of the piston.

Claims (4)

In the oil supply for cooling the piston, A balance weight 200 compressed by the driving of the connecting rod; Pressure forming means for forming an oil injection pressure by compression of the balance weight; The oil supply device for the piston cooling, characterized in that the oil injection means 330 is formed integrally with the pressure forming means and the oil is injected into the oil gallery by the oil injection pressure. The method of claim 1, wherein the pressure forming means and the push rod 210 to move by compression of the balance weight (200); A first plunger (220) formed integrally with the push rod (210) and moving in the same direction as the push rod (210); A first spring 230 for elastically supporting the first plunger 220 at a lower end of the first plunger 220; A first cylinder 240 to which a lower end of the first spring 230 is fixed and the first plunger 220 slides; An oil pipe 250 formed to penetrate the compressed oil 310 to the outside of the first cylinder 240; A second cylinder 260 formed through one end of the oil pipe 250; A second plunger (270) slid by the compressed oil (310) in the second cylinder (260); The oil supply device for cooling the piston, characterized in that the elastic support for the second plunger (270), consisting of a second spring (280) fixed to the upper end of the second cylinder (260). 3. The method of claim 2, wherein the second cylinder 260 has an inlet 290 in which the lubricating oil 320 is supplied when the second plunger 270 is lowered by the restoring force of the second spring 280 on the side wall. An oil supply for cooling the piston. The oil supply apparatus for cooling the piston according to claim 2 or 3, wherein the second cylinder 260 has a discharge port 300 through which the lubricating oil 320 is discharged to the oil injection means 330. .

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