KR20110011209A - Test device and method for designing oil gallery and oil gallery inlet shape of engine piston - Google Patents

Abstract

PURPOSE: A testing device and a testing method for designing the shape of an oil gallery and an oil inlet for an engine piston are provided to enable easy test to determine the shape of an oil gallery and an oil inlet of a piston for various engines. CONSTITUTION: A testing device for designing the shape of an oil gallery and an oil inlet for an engine piston comprises a frame(10), a chuck(20), a piston(30), a stage(40), and a beaker(50). The chuck is installed on the inner top of the frame. The piston is fixed to the upper end of the chuck. An oil inlet connected to the oil gallery is formed at the lower end of the piston. The top of the oil gallery is cut, so the oil gallery is exposed. The stage is mounted on the upper surface of the transport line. The stage is connected to a pump(85) formed in an oil tank(80). The stage comprises an injection jet(41) which periodically injects oil to the oil inlet. The beaker collects oil flowing in the oil inlet through a hose connected to the connection portion between the oil inlet and the oil gallery.

Description

Test device and method for designing oil gallery and oil gallery inlet shape of engine piston}

The present invention relates to a test apparatus and a test method for designing an oil gallery and an oil inlet shape of an engine piston to improve durability by cooling the engine piston, and more particularly, to a piston for manufacturing an engine piston that operates efficiently. The present invention relates to a test apparatus and a test method used for designing and verifying the main shape of an oil gallery through comparative experiments on the shape and size of an oil gallery provided and an oil inlet communicating with the oil gallery.

In general, the gravity casting method refers to a casting method in which a molten metal is injected into a mold by gravity to make a casting. At present, pistons are made of non-ferrous alloys such as aluminum (Al), magnesium (Mg), copper (Cu), cast iron, or steel. It is widely used to manufacture sleeves, crankcases, cylinders, bearings, and the like.

The piston manufacturing apparatus used in the gravity casting method uses a ladle to inject molten metal into a mold of a casting machine, and to mold / solidify for a predetermined time, and then open the mold to cool the molded product in a water tank, and after the product is cooled Separates the hot water part and the product by using a cutter.

The vehicle engine piston generated in this manner is generally a device that receives the combustion explosive force generated in the cylinder and transfers it to the connecting rod while reciprocating the inside of the cylinder to generate rotational force on the crankshaft. In the design of the device, a hollow oil gallery is installed to cool the periphery of the combustion chamber formed at the top of the piston to prevent the piston from overheating.

Therefore, in such an oil gallery, the circulation of the oil should be easily achieved, and the oil inlet for injecting oil into the oil gallery is preferably in a shape in which oil can be efficiently injected. In particular, the piston is not only reciprocating periodically at high speed, but also because it is not easy to completely inject oil into the oil inlet of the moving piston due to the change in the injection angle of the oil jet nozzle. Determination is very important, and the size and shape of the oil gallery is also very important because the circulation of the oil injected through the oil inlet must be well enough to efficiently cool the surroundings of the combustion chamber formed at the top of the piston.

There was a comparative experiment using the engine itself manufactured by the conventional test technique, but this was difficult and costly and time-consuming because the large engine had to be installed and used as a test apparatus as a whole. In the design process of the sieve, there were disadvantages in that it was not possible to carry out a number of tests by changing the shape of the oil gallery and the oil inlet, and it was also cumbersome and difficult to perform the tests.

The present invention is to provide a test apparatus and method for recognizing the importance of the oil gallery in the engine piston to determine the shape and size of the oil inlet and the oil gallery in which the oil is injected to efficiently inject the oil in the oil gallery.

In the present invention, the use of the engine as a whole in the prior art can be used by mounting only the piston to make the test very simple to facilitate the comparative test.

In addition, by using a PC to control and record the flow rate and flow rate of the test process as a whole, and to automatically control the test time to improve the accuracy and convenience of the test.

The present invention relates to a test apparatus and test method for the oil gallery and oil inlet shape design of the engine piston,

Frame 10; A chuck 20 installed on an inner upper end of the frame 10; The upper end is fixed to the chuck 20 and has an oil inlet 32 communicating with an oil gallery 31 at a lower end thereof, and an upper part of the oil gallery 31 is cut to have an oil gallery 31. The exposed piston 30; The oil inlet 32 of the piston 30 is mounted on the upper surface of the transfer system 49 installed in the frame 10 so as to be movable, and connected to the pump 85 provided in the oil tank 80. A stage 40 having a jet jet 41 for periodically spraying oil on the substrate; And a beaker 50 in which oil flowing into the oil inlet 32 is collected by a hose connected to a portion where the oil inlet 32 communicates with the oil gallery 31. It provides a test apparatus for the oil gallery and oil inlet shape design of the engine piston comprising a, and also provides a test method using the test device.

According to the present invention, it is possible to perform a test for easily determining the oil inlet and the oil gallery shape of the piston for an engine of all specifications without having an actual engine. In addition, it is possible to perform the test in conjunction with the PC, so that the test can be performed while monitoring and controlling the main variables by the PC, thereby obtaining more accurate results than by manual work.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in this specification and claims should not be construed in a common or dictionary sense, and the inventors will be required to properly define the concepts of terms in order to best describe their invention. Based on the principle that it can, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the configuration shown in the drawings are only the most preferred embodiment of the present invention and not all of the technical idea of the present invention, at the time of the present application, various equivalents that can replace them It should be understood that there may be water and variations.

First, the test apparatus for oil gallery and oil inlet shape design of the engine piston of this invention is demonstrated.

Figure 1 is a schematic view showing a test device of the present invention, Figure 2a is a perspective view showing the appearance of the chuck used in the test device of the present invention, Figure 2b is a perspective view showing the inside of the chuck used in the test device of the present invention, Figure 3a is In the present invention, a perspective view of a piston used when calculating the inlet efficiency of the oil inlet, Figure 3b is a perspective view of a piston used when calculating the collection efficiency of the oil gallery in the present invention, Figures 4a to 4c The figure which shows the state of the stage used for the inventor's test apparatus.

The test apparatus according to the present invention is for determining the size and shape of the oil inlet (32) and the oil gallery (31). The test apparatus used is the same, but the piston mounted to the test apparatus is appropriately modified according to the test purpose. Will be used.

That is, when determining the shape of the oil inlet 32, only the shape of the oil inlet 32 should be purely variable, so the upper part of the oil gallery 31 is cut out of the piston 30 so that the oil gallery 31 is exposed. One piston 30 is used (see FIG. 3A). On the other hand, when determining the shape of the oil gallery 31, the piston 30 is used with the shape intact (see FIG. 3B). The structure will be described below.

A test apparatus for determining the shape of the oil inlet 32, the frame 10; A chuck 20 installed on the inner top of the frame 10; The upper end is fixed to the chuck 20 and has an oil inlet 32 communicating with an oil gallery 31 at a lower end thereof, and an upper part of the oil gallery 31 is cut to have an oil gallery 31. The exposed piston 30; The oil inlet 32 of the piston 30 is mounted on the upper surface of the transfer system 49 installed in the frame 10 so as to be movable, and connected to the pump 85 provided in the oil tank 80. A stage 40 having a jet jet 41 for periodically spraying oil on the substrate; And a beaker 50 in which oil flowing into the oil inlet 32 is collected by a hose connected to a portion where the oil inlet 32 communicates with the oil gallery 31. It provides a test apparatus for the oil gallery and oil inlet shape design of the engine piston comprising a.

As a test apparatus for determining the shape of the oil gallery 31, the frame 10; A chuck 20 installed on an inner upper end of the frame 10; A piston 30 having an upper end fixed to the chuck 20 and an oil inlet 32 communicating with an oil gallery 31 at a lower end thereof; The oil inlet 32 of the piston 30 is mounted on the upper surface of the transfer system 49 installed in the frame 10 so as to be movable, and connected to the pump 85 provided in the oil tank 80. A stage 40 having a jet jet 41 for periodically spraying oil on the substrate; And a beaker 50 in which oil is collected by a hose which is provided at the piston 30 and connected to an oil gallery 31 and connected to an oil outlet 33 to which the oil introduced into the oil inlet 32 flows out. ; It also provides a test apparatus for the oil gallery and oil inlet shape design of the engine piston comprising a.

That is, as described above, the test apparatus for determining the shape of the oil inlet 32 and the oil gallery 31 is different in the shape of the piston 30 used, respectively, and thus the beaker 50 for collecting oil and The hoses to be connected are slightly different, but the rest are identical.

The frame 10 corresponds to a tool for supporting a test apparatus used in the present invention, and is not particularly limited in shape. However, since the present experiment is a device for injecting oil to measure its acquisition efficiency and collection efficiency, the frame 10 preferably forms a closed space to prevent oil from splashing in all directions. That is, as shown in FIG. 1, the frame 10 is preferably vertically long and generally cylindrical or rectangular in shape, and preferably has a transparent wall such that the inside thereof is visible.

A chuck 20 is installed at an upper upper end of the frame 10. A chuck is an attachment that holds a workpiece by mounting it at the end of a spindle, typically a machine tool. In the present invention, since a device for firmly fixing the piston 30 is required, the piston 30 is fixed by installing the chuck 20 on the inner ceiling of the frame 10 for this purpose.

In particular, the diameter of the piston also changes significantly because of the variety of pistons to be tested using this tester. Therefore, it is very important to be able to easily fix and test a piston having an unspecified diameter. In the present invention, by providing a chuck, various types of pistons can be tested regardless of the diameter of the piston.

2A and 2B, the chuck 20 includes a fixing plate 21 that protrudes outward to fix the piston 30, and has a rotating plate rotating inside the center of the chuck 20. 22 and the rotary bar 23 is engaged with the rotary plate 22 and rotates according to the rotation of the rotary plate 22 to change it into an axial rotation, and is coupled to the rotary bar 23 by screwing. It is configured to include a pusher device 24 coupled with the fixing bar 21 to move in the longitudinal direction of the rotary bar 23 in accordance with the rotation of the rotary bar (23). That is, according to the rotational direction of the rotating plate 22, the clamp 21 is finally moved to the center or the outward direction of the chuck 20.

The piston 30 fixed to the chuck 20 is an object for testing purposes in the present invention. Further, as described above, the shape of the piston 30 is different depending on which of the oil inlets 32 and the oil gallery 31 is a test for determining the shape.

Determining the shape of the oil inlet 32 is to determine whether the oil is well injected into the oil gallery 31 provided in the piston 30, so that anything other than the shape of the oil inlet 32 may affect Can not be done.

That is, the piston 30 is generally provided with an oil gallery 31 having a ring-shaped hollow portion therein and having an oil inlet 32 and an oil outlet 33 communicating with the oil gallery 31 at the bottom thereof. The oil injected into the oil inlet 32 is cooled through the oil outlet 33 while cooling the piston 30 while circulating the oil gallery 31. Therefore, when the piston 30 is used by itself, the oil injected into the oil inlet 32 is clogged to the oil gallery 31, which is a very narrow passage, so that the oil inlet 32 through accurate intake efficiency measurement. It is difficult to determine the shape of).

Thus, the draft is cut so as to cut the upper portion of the oil gallery 31 in the piston 30 so that the upper portion of the oil inlet 32 communicating with the oil gallery 31 and the oil gallery 31 is exposed. This is to use the piston 30. In this way, since the oil injected through the oil inlet 32 is not caught in the narrow oil gallery 31, it is possible to purely measure the acquisition efficiency of the oil.

However, as will be described below, the hose connected to the beaker 50 for collecting the obtained oil is installed at the portion where the oil gallery 31 communicates with the oil inlet 32 and sends the obtained oil directly to the beaker 50. It becomes.

In addition, in the test for determining the shape of the oil gallery 31, the intact piston 30 is used as it is. This is because the shape of the oil gallery 31 is maintained as it is to measure the accurate collection efficiency.

However, as will be described below, a hose connected to the beaker 50 for collecting the oil obtained is mounted on the oil outlet 33 in communication with the oil gallery 31 to circulate and discharge the oil gallery 31. Will be sent directly to the beaker 50.

The oil inlet 32 of the piston 30 is mounted on the upper surface of the transfer system 49 installed in the frame 10 so as to be movable and connected to the pump 85 provided in the oil tank 80. The stage 40 having a jet jet 41 for periodically spraying oil is mounted inside the frame 10.

In principle, the engine piston performs vertical movement and sprays oil from the fixed oil jet nozzle (oil jet nozzle). However, in the present invention, the piston is fixed and the distance between the oil jet and the piston is varied. Spray oil in a fixed condition. Here, the separation distance is preferably one of three distances including the closest distance, the intermediate distance, and the longest distance between the piston and the jetting jet, but there is no limitation.

That is, the piston 30 is fixed to the inner upper end of the frame 10 by the chuck 20 as described above, the stage 40 having the jet jet 41 is the upper portion of the transfer system 49 It is fixed to the fixed spaced apart at a predetermined distance.

The transfer system 49 is preferably mounted in a rail form on the side wall of the frame 10, but the form is not limited thereto. Since the transfer system 49 should be able to move up and down in a tightly fixed state, at least two rails are preferably provided on the side wall of the frame 10.

The stage 40 is fixedly mounted on the upper surface of the transfer system 49 and connected to the pump 85 provided in the oil tank 80 to periodically spray oil to the oil inlet 32 of the piston 30. A jet jet 41 is provided.

Since the piston 30 fixed to the chuck 20 has various sizes according to the size and type of the engine in which the piston is used, the position of the oil inlet 32 is changed according to the size of the piston 30. Therefore, the position of the jet jet 41 for injecting oil into the oil inlet 32 must also be changed according to the type of the piston 30 so that the oil inlet 32 can be accurately aimed in the same manner as the engine design specification. . The stage 40 adjusts the horizontal position, the spraying angle, and the like of the jetting jet 41. Therefore, the stage 40 should be capable of horizontal movement, rotation, and angle adjustment (tilting) of the X and Y axes. The stage 40 is not limited to the method of operation thereof, but may be used as shown in Figures 4a to 4c as an example.

As shown in FIGS. 4A to 4C, the stage 40 includes a front and rear moving part 42, a left and right moving part 43, a rotating part 44, and an angle adjusting part (tilting part 45).

The front and rear movement of the front and rear movement unit 42 is a gear device that converts the axial rotation of the front and rear movement bar 42a into a horizontal movement movement, and the left and right movement of the left and right movement unit 43 is the left and right movement bar 43a. It is by gear device that converts shaft rotation into horizontal movement. In addition, the rotational movement of the rotary unit 44 is by a gear device for converting the axial rotational movement of the rotary movement bar 44a to the rotational movement of the rotary unit 44, the angle adjustment of the angle adjustment unit 45 is the The axial rotation of the angle adjustment bar (45a) by the gear device for converting the circular motion of the angle adjusting portion 45. Since such a gear device is already known, a detailed description thereof will be omitted.

The oil tank 80 supplies oil to the tank for storing oil, or the remaining oil used for the test is injected again.

The pump 85 serves to supply oil from the oil tank 80 to the jet jet 41 to inject oil in the direction of the oil inlet 32 so that the oil tank 80 may be provided.

In the present invention, the beaker 50 is provided as a means for measuring the mass by collecting the injected oil. The beaker 50 is preferably connected to one end of the hose to the outside of the frame 10, the position of the other end of the hose connected to the piston 30 is different depending on the shape of the piston (30).

That is, when the upper portion of the oil gallery 31 of the piston 30 is cut out (intake efficiency measurement test), a hose is connected to a portion where the oil inlet 32 communicates with the oil gallery 31, In the case of the piston 30 for the test for measuring the collection efficiency, the hose is connected to the oil outlet 33 and the oil introduced into the oil inlet 32 circulates through the oil gallery 31, and then the oil outlet 33. Through the beaker 50 is to be collected.

The oil collected by the beaker 50 for a predetermined time is put back into the oil tank after measuring the mass.

In addition, the present invention is characterized in that it further comprises a pressure gauge, a thermometer and a flow meter for measuring the pressure, temperature and flow rate of the oil supplied to the jet jet 41 of the stage 40.

That is, as shown in Figure 1 is mounted on the hose for supplying oil to the jet jet 41 in the oil tank 80 to measure the pressure, temperature and flow rate of the oil supplied to the jet jet (41). When testing using this test apparatus, the pressure and temperature of the oil must be constant, and the flow rate will be described in the following test method, because it is necessary in the process of calculating the availability and collection efficiency.

In addition, the test apparatus of the present invention is preferably connected to the PC 70 systemically. That is, the pressure gauge, the thermometer and the flow meter are connected to the PC 70 having the data logger systemically characterized by continuously measuring the pressure, temperature and flow rate of the oil to be displayed on the monitor. That is, a data logger is provided to continuously display data and to display the information on the monitor of the PC 70.

In addition, in order to increase the convenience of the operation of the test device and the accuracy of the test, the hose connected to the beaker 50 is provided with a distributor 60 having two discharge ports, one beaker 50 and the other oil It is connected to the tank 80, the distributor 60 is systematically connected to the PC 70 to discharge the oil to the beaker 50 during the time specified in the PC 70, the other time the It is characterized in that to discharge the oil into the oil tank (80).

The dispenser 60 sends the oil discharged to the beaker 50 only for a predetermined time, and to the oil tank 80 at other times to improve the accuracy of the test and to conveniently use the test apparatus. It is to play a role. That is, the test is to obtain the oil discharge for a predetermined time, so to install the distributor 60 to solve this automatically.

In addition, the dispenser 60 may also be systemically interlocked with the PC 70 to allow the PC 70 to adjust its operation.

In addition, the pump 85 is systemically connected to the PC 70 can be operated from the PC 70, it is characterized in that the speed of the pump 85 is adjustable.

That is, the operation of the pump 85 for supplying oil can also be made by the computer, it is also possible to adjust the pumping speed of the pump 85 as necessary.

Next, a method of performing the test using the test apparatus for oil gallery and oil inlet shape design of the engine piston of the present invention will be described.

Figure 5 is a flow chart showing a test method for estimating the acquisition efficiency of the oil inlet in the present invention, Figure 6 is a flow chart showing a test method for estimating the collection efficiency of the oil gallery in the present invention.

This test method relates to a method of performing the test using the above-described test apparatus for the oil gallery and the oil inlet shape design of the engine piston, the case of estimating the water inlet efficiency of the oil inlet 32 and of the oil gallery 31 The test method for estimating collection efficiency shall be explained in parallel.

1. Piston fixing step ( S11 , S21 )

The upper part of the oil gallery 31 is cut on the chuck 20 of the inner top of the frame 10 to fix the piston 30 or the intact piston 30 to which the oil gallery 31 is exposed. to be.

2. Jet  Position adjustment step S12 , S22 )

Adjusting the position and angle of the jet jet 41 of the stage 40 in accordance with the engine design specifications to aim the oil inlet 32 of the fixed piston (30). Since the pistons used in this test vary in size, the position of the jet jet 41 should be adjusted according to the engine design and specifications so as to correspond to the corresponding piston 30 in each test. The position of the jet jet 41 can be freely adjusted by X, Y-axis horizontal movement, rotation, tilting, etc. of the stage 40.

3. Oil spraying step ( S13 , S23 )

In reference to the actual engine design specifications, the feed meter 49 is fixed to the piston 30 at a predetermined distance, and the pump 85 provided in the oil tank 80 is operated while measuring the amount of oil injected. In the jet 41, oil is periodically sprayed on the oil inlet 32. At this time, the viscosity of the oil, injection pressure, etc. are the same with reference to the actual engine design specifications.

4. Time setting step ( S14 , S24 )

The oil inlet 32 is connected to the portion communicating with the oil gallery 31 (when using a piston cut off the top of the oil gallery) or the hose connected to the oil outlet 33 (using an intact piston Is set in the beaker 50 oil inlet time of the dispenser (60) provided in the case. In this test, since the amount of oil injected into the oil inlet 32 of the piston 30 for a predetermined time or the oil gallery 31 is circulated for a predetermined time and the amount of oil discharged to the oil outlet 33 is measured, By setting the time in the dispenser 60, the oil is discharged to the beaker 50 only during the set time.

5. Mass measurement step ( S15 , S25)

It is a step of measuring the mass of the oil collected in the beaker 50 after the time set in the time setting step (S14, S24).

6. Estimation efficiency step S16 ) Or collection efficiency calculation step ( S26 )

Using the mass measured in the mass measurement step (S15, S25) to calculate the acquisition efficiency (S16), or to calculate the collection efficiency (S26).

Equation 1 to calculate the efficiency in the acquisition efficiency calculation step (S16) is to use the following [Equation 1], and [Figure 1] is a diagram showing the basis for calculating the efficiency.

[Equation 1]

(η _t : Efficacy efficiency, Q ₁ : Quantity of oil injected from the jet (l / min), Q ₃ = (60 * m) / (1000 * ρ * t) [l / min], m: into the beaker Mass of collected oil (g), ρ: density of oil (g / cm ³ ), t: time set in the distributor (s)

[Figure 1]

As shown in [Fig. 1], the ratio of the oil Q ₃ introduced into the oil inlet 32 with respect to the oil Q ₁ injected from the jet jet 41 corresponds to the acquisition efficiency.

Equation 2 to calculate the collection efficiency in the collection efficiency calculation step (S26) is to use the following [Equation 2], and [Figure 2] shows a figure of the basis for calculating the collection efficiency.

[Equation 2]

(η _c : collection efficiency, Q ₁ : amount of oil injected from the jet (l / min), Q ₃ = (60 * m) / (1000 * ρ * t) [l / min], m: in the beaker Mass of collected oil (g), ρ: density of oil (g / cm ³ ), t: time set in the distributor (s)

[Figure 2]

As shown in [Figure 2], the ratio of the oil (Q ₃ ) discharged to the oil outlet 33 to the oil (Q ₁ ) injected from the jet jet 41 corresponds to the acquisition efficiency.

7. Comparative measurement S17 , S27)

The separation distance between the jet jet 41 and the piston 30 is varied based on the design specifications of the engine, and the steps S11 to S16 or the steps S21 to S26 are repeated while changing the shape of the oil inlet 32. It's a step. In the actual engine, the separation distance between the jetting jet 41 and the piston 30 is repeatedly moved up and down at a speed of several thousand rpm between the farthest distance and the closest distance, so that the jetting jet 41 This is because it is necessary to measure the acquisition efficiency and the collection efficiency by testing while varying the separation distance between the piston 30 and the oil inlet 32.

In addition, since the purpose of this test is to determine the shape of the oil inlet 32 through which oil is obtained most efficiently, and to find the shape and minimum diameter of the oil gallery 31 that does not interfere with the circulation of the obtained oil. The test should be carried out while varying the shape of (32) or the oil gallery (31), and the change in the intake and circulation of the oil according to the change of the shape should be identified.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

1 is a schematic diagram showing a test apparatus of the present invention.

Figure 2a is a perspective view showing the state of the chuck used in the test apparatus of the present invention,

Figure 2b is a perspective view showing the interior of the chuck used in the present testing device.

Figure 3a is a perspective view of the piston used in the case of calculating the water inlet efficiency of the oil inlet in the present invention,

Figure 3b is a perspective view of the piston used when calculating the collection efficiency of the oil gallery in the present invention.

Figures 4a to 4c is a view showing a state of the stage used in the test apparatus of the present invention.

Figure 5 is a flow chart showing a test method in the case of calculating the acquisition efficiency of the oil inlet in the present invention,

Figure 6 is a flow chart showing a test method for estimating the collection efficiency of the oil gallery in the present invention.

<Description of Symbols for Main Parts of Drawing>

10: frame

20: Chuck

21: clamp

22: rotating plate

23: rotating bar

24: jungle device

30: piston

31: Oil Gallery

32: oil inlet

33: oil outlet

40: stage

41: jet jet

42: front and rear moving part

42a: forward and backward movement bar

43: left and right moving parts

43a: left and right moving bar

44: rotating part

44a: rotation bar

45: tilting part (angle adjusting part)

45a: Angle adjustment bar

49: transfer system

50: beaker

60: divider

70: PC

80: oil tank

85: pump

Claims (13)

Frame 10; A chuck 20 installed on an inner upper end of the frame 10; The upper end is fixed to the chuck 20 and has an oil inlet 32 communicating with an oil gallery 31 at a lower end thereof, and an upper part of the oil gallery 31 is cut to have an oil gallery 31. The exposed piston 30; The oil inlet 32 of the piston 30 is mounted on the upper surface of the transfer system 49 installed in the frame 10 so as to be movable, and connected to the pump 85 provided in the oil tank 80. A stage 40 having a jet jet 41 for periodically spraying oil on the substrate; And A beaker 50 in which the oil flowing into the oil inlet 32 is collected by a hose connected to a portion where the oil inlet 32 communicates with the oil gallery 31; Test apparatus for oil gallery and oil inlet shape design of the engine piston comprising a. Frame 10; A chuck 20 installed on an inner upper end of the frame 10; A piston 30 having an upper end fixed to the chuck 20 and having an oil inlet 32 and an oil outlet 33 communicating with an oil gallery 31 at a lower end thereof; The oil inlet 32 of the piston 30 is mounted on the upper surface of the transfer system 49 installed in the frame 10 so as to be movable, and connected to the pump 85 provided in the oil tank 80. A stage 40 having a jet jet 41 for periodically spraying oil on the substrate; And A beaker 50 provided at the piston 30 and communicating with the oil gallery 31 to collect oil by a hose connected to an oil outlet 33 portion through which the oil introduced into the oil inlet 32 flows out; Test apparatus for oil gallery and oil inlet shape design of the engine piston comprising a. The method according to claim 1 or 2, The stage 40, Shape design of the oil gallery and the oil inlet of the engine piston, characterized in that the X-axis, Y-axis horizontal movement, tilt adjustment and rotation of the stage 40 is possible to adjust the injection position and the injection angle of the jet jet 41 Test equipment. The method according to claim 1 or 2, The transfer system (49) is a test apparatus for the oil gallery and oil inlet shape design of the engine piston, characterized in that mounted on the side wall of the frame 10 in the form of a rail. The method according to claim 1 or 2, Test apparatus for the oil gallery and oil inlet shape design of the engine piston further comprises a pressure gauge, a thermometer and a flow meter for measuring the pressure, temperature and flow rate of the oil supplied to the injection jet 41 of the stage 40 . The method of claim 5, The pressure gauge, the thermometer, and the flow meter are connected to the PC 70 having the data logger systematically connected to the oil gallery of the engine piston, characterized in that to continuously measure and display the pressure, temperature and flow rate of the measured oil and Test equipment for oil inlet shape design. The method of claim 6, The hose connected to the beaker 50 is provided with a distributor 60 having two discharge ports, one to be connected to the beaker 50 and the other to the oil tank 80, The distributor 60 is systematically connected to the PC 70 to discharge oil to the beaker 50 during the time designated by the PC 70, and to discharge the oil to the oil tank 80 at other times. Test apparatus for the oil gallery and oil inlet shape design of the engine piston, characterized in that to discharge. The method of claim 7, wherein The pump (85) is connected to the PC (70) is systematically connected to the oil gallery and the oil inlet shape design test apparatus of the engine piston, characterized in that the operation is possible from the PC (70). The method of claim 8, The PC 70 is a test apparatus for the oil gallery and the oil inlet shape design of the engine piston, characterized in that the speed of the pump 85 is adjustable. The present invention relates to a method for designing an oil gallery and an oil inlet shape using a test apparatus for designing an oil gallery and an oil inlet shape of an engine piston. An upper portion of the oil gallery 31 on the chuck 20 of the inner top of the frame 10 is cut and a piston fixing step S11 for fixing the piston 30 to which the oil gallery 31 is exposed; An injection jet position adjustment step (S12) of adjusting the position of the injection jet 41 of the stage 40 to an engine specification so as to aim the oil inlet 32 of the fixed piston 30; The oil inlet in the jet jet 41 is fixed to the piston 30 by a predetermined distance from the piston 30, and operates the pump 85 provided in the oil tank 80 to measure the amount of oil injected. Oil spray step (S13) for periodically spraying the oil to the 32; A time setting step (S14) of setting a beaker (50) oil inflow time of the distributor (60) provided in the hose connected to the portion in which the oil inlet (32) communicates with the oil gallery (31); A mass measurement step (S15) of measuring a mass of oil collected in the beaker (50) after a time set in the time setting step (S14); An acquisition efficiency calculation step (S16) of calculating an acquisition efficiency using the mass measured in the mass measurement step (S15); And Comparative measuring step (S17) of varying the separation distance of the jet jet 41 and the piston 30, and repeatedly testing the steps S11 to S16 while changing the shape of the oil inlet (32); Test method for the oil gallery and oil inlet shape design of the engine piston comprising a. The method of claim 10, Test method for the oil gallery and oil inlet shape design of the engine piston, characterized in that the equation for calculating the water efficiency in the water efficiency calculation step (S16) is the following Equation 1. [Equation 1]

(η _t : Efficacy efficiency, Q ₁ : Quantity of oil injected from the jet (l / min), Q ₃ = (60 * m) / (1000 * ρ * t) [l / min], m: into the beaker Mass of collected oil (g), ρ: density of oil (g / cm ³ ), t: time set in the distributor (s) The present invention relates to a method for designing an oil gallery and an oil inlet shape using a test apparatus for designing an oil gallery and an oil inlet shape of an engine piston. A piston fixing step S21 for fixing the piston 30 to the chuck 20 at the upper end of the frame 10; An injection jet position adjusting step (S22) of adjusting the position of the injection jet 41 of the stage 40 to an engine specification so as to aim the oil inlet 32 of the fixed piston 30; The oil inlet in the jet jet 41 is fixed to the piston 30 by a predetermined distance from the piston 30, and operates the pump 85 provided in the oil tank 80 to measure the amount of oil injected. Oil spray step (S23) for periodically spraying the oil to the 32; A time setting step (S24) of setting a beaker 50 oil inflow time of the distributor 60 provided in the hose connected to the oil outlet 33; A mass measurement step (S25) of measuring a mass of oil collected in the beaker (50) after a time set in the time setting step (S24); A collection efficiency calculation step (S26) of calculating a collection efficiency using the mass measured in the mass measurement step (S25); And Comparative measuring step (S27) of varying the separation distance of the jet jet 41 and the piston 30, and repeatedly testing the steps S21 to S26 while changing the shape of the oil gallery (31); Test method for the oil gallery and oil inlet shape design of the engine piston comprising a. The method of claim 12, Test method for the oil gallery and oil inlet shape design of the engine piston, characterized in that the equation for calculating the collection efficiency in the collection efficiency calculation step (S26) is [Equation 2] below. [Equation 2]

(η _c : collection efficiency, Q ₁ : amount of oil injected from the jet (l / min), Q ₃ = (60 * m) / (1000 * ρ * t) [l / min], m: in the beaker Mass of collected oil (g), ρ: density of oil (g / cm ³ ), t: time set in the distributor (s)

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