KR100240388B1 - Oil pressure apparatus - Google Patents

Abstract

The present invention relates to a device for maintaining a uniform oil pressure of a vehicle, and in the related art, a valve is pushed directly by a spring, and thus, it cannot cope with a fluctuation in pressure.

As illustrated in FIG. 4, an oil strainer 4, an oil cleaner 5, and an oil cooler 6 are installed in connection with an oil pump 3 for circulating the engine oil 2 in the oil pan 1. The upper chamber 12 and the lower chamber 13 are formed between the supply passage 7 and the main oil passage 8 of the oil strainer 4, and the diaphragm 14 is provided therebetween, The oil (17) in the chamber (12) and the nitrogen gas (15) or air in the lower chamber (13) are sealed to a constant pressure, and the upper end of the upper chamber (12) is provided with a ball valve (16). .

Description

Uniform oil pressure maintaining device of vehicle

The present invention relates to a device for maintaining a uniform oil pressure of a vehicle, and more particularly, to a device for maintaining a uniform oil pressure using nitrogen gas or air for maintaining a constant pressure in a lubrication device.

Many parts rub against each other during the rotation of the engine, and many of them rub at high speed while being subjected to a considerable load.

The forces used in these frictional parts are all resistances and losses to the forces obtained from the expansion stroke of the cylinder.

In addition, friction between parts naturally causes wear of the parts, which shortens the life and causes the overall performance of the engine to decrease.

The purpose of lubrication is to prevent the above two points, and the lubricating oil used for this purpose has effects such as gamma action (cooling reduction), cooling action, sealing action, buffer action, rust prevention action, and clean action depending on the place of use. Will be.

Lubrication device for the rotation of the lubricating oil is an oil pump for pumping the oil pan (1), the engine oil (2) corresponding to the backing plate of the engine oil at the bottom of the engine as shown in Figure 1 to the crankshaft bearing or camshaft bearing (3), an oil strainer 4, an oil cleaner 5 for removing impurities contained in the engine oil, an oil cooler 6 for cooling the engine oil, and the like.

The amount of engine oil discharged from the oil pump is up to 30-40 liters per minute, and the feeding pressure is up to about 5kg / ㎠.

When the engine is cooled, the pressure is higher because the viscosity of the engine oil is high.

However, this high pressure is not necessary for the lubrication of each part of the engine, so an oil strainer (oil pressure regulator) is installed to maintain a constant pressure of the engine oil discharged from the oil pump, and the discharge pressure of the oil is 4 kg / ㎠ If it exceeds, it operates to reduce surplus pressure.

2 is an enlarged cross-sectional view of a conventional oil strainer 4, the engine oil 2 coming from the pump is transferred to the main oil passage 8 through the supply passage 7, the supply passage 7 and the main oil A hydraulic control valve 10 supported by a spring 9 is provided between the passages 8.

Therefore, if the pressure of the engine oil conveyed toward the main oil passage 8 becomes too large, the hydraulic control valve 10 is lowered while compressing the spring 9 by the pressure, and a part of the engine oil conveyed to the main oil passage 8 is It is conveyed toward the oil pan 1 through the return passage (11).

This is provided for the purpose of protecting the oil cooler 6 so as not to overload the drive system due to an abnormal rise in pressure immediately after cold start.

However, the oil strainer as described above has a drawback in that the discharge amount due to the pressure fluctuation is large due to the characteristics of the gear pump (R.P.M.).

In order to solve the drawbacks of the conventional oil strainer, the present invention injects nitrogen gas or air into a closed space and installs a diaphragm on the upper surface to minimize the variation in discharge amount due to pressure fluctuation. It is an object to provide a retaining device.

The present invention for realizing the above object is to provide a uniform oil pressure maintaining device between the supply passage and the main oil passage in which the engine oil is transferred in the lubrication apparatus for circulating the engine oil in the oil pan to the oil cooler, oil cleaner, etc. Injecting nitrogen gas or air into the lower chamber at a constant pressure and injecting oil into the upper chamber, a diaphragm is installed between them, and a ball valve is installed at the top of the upper chamber.

1 is a schematic diagram of a lubricator installed with a conventional oil strainer.

2 is a cross-sectional view of a conventional oil strainer.

3 is a schematic diagram of a lubricator installed with an oil pressure maintaining device according to the present invention.

4 is a cross-sectional view of the oil pressure maintaining device according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Oil pan 2: Engine oil

3: oil pump 4: oil strainer

5: oil cleaner 6: oil cooler

7: Supply passage 8: Main oil passage

9: spring 10: hydraulic control valve

11: Return passage 12: Upper chamber

13: lower chamber 14: diaphragm

15: nitrogen gas 16: ball valve

17: oil

The present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to an oil strainer (4), an oil cleaner (5), and an oil cooler (6) connected to an oil pump (3) for circulating the engine oil (2) in the oil pan (1). An upper chamber 12 and a lower chamber 13 are formed between the supply passage 7 and the main oil passage 8 of (4), and a diaphragm 14 is provided therebetween, and in the upper chamber 12 In the oil 17, the lower chamber 13, the nitrogen gas 15 or air is sealed to a certain pressure, and the upper end of the upper chamber 12 is provided with a ball valve 16.

4 is an oil circulation cross-sectional view showing an improved oil pressure maintaining apparatus according to the present invention, wherein a diaphragm 14 is formed between the supply passage 7 and the main oil passage 8 downwardly. ) Is installed in the transverse direction and divided into the upper chamber 12 and the lower chamber 13, and the nitrogen gas or air is injected into the lower chamber 13 to maintain a constant pressure, and the oil in the upper chamber 12 Injecting the upper end of the ball valve 16 is to be lowered.

The ball valve 16 is not to be lowered below a predetermined position according to the upper end of the upper chamber 12 is formed.

Therefore, the height of the ball valve 16 is maintained at almost the same height as the upper inlet height of the upper chamber 12 in accordance with the air pressure or nitrogen gas pressure in the lower chamber 13 and the pressure of the engine oil in the supply passage (7) When the pressure rises, the oil 17 in the upper chamber 12 is pushed down and the diaphragm 14 is also pressed in order to compress the nitrogen gas 18 in the lower chamber 13, on the contrary, the supply passage 7 When the pressure of the engine oil passing through the lower) decreases the ball valve 16 by the restoring force of the diaphragm 14 to narrow the passage between the supply passage 7 and the main oil passage (8).

In the present invention, the engine oil (2) in the oil pan (1) is circulated to the oil pump (3), the upper and lower parts between the supply passage 7 and the main oil passage (8) of the oil strainer (4) By forming chambers 12 and 13 and installing a diaphragm 14 therebetween, by filling nitrogen gas 15 and oil 17 into the chamber, the ball valve 16 is elevated by pressure. It can prevent the overload of the drive system due to abnormal pressure rise and minimize the performance change caused by pressure fluctuations. It does not require a separate safety valve.

Claims (1)

In the structure in which the oil strainer 4, the oil cleaner 5, and the oil cooler 6 are installed in connection with the oil pump 3 for circulating the engine oil 2 in the oil pan 1, the oil described above. An upper chamber 12 and a lower chamber 13 are formed between the supply passage 7 and the main oil passage 8 of the strainer 4, and a diaphragm 14 is installed therebetween, and the upper chamber 12 The oil (17) is sealed in the inside, and the nitrogen gas (15) or air is sealed in the lower chamber (13) so as to have a constant pressure, and the ball valve (16) is provided at the upper end of the upper chamber (12). The vehicle, characterized in that for adjusting the amount of oil by narrowing or widening the passage between the supply passage 7 and the main oil passage 8 by raising or lowering the ball valve 16 according to the pressure of the engine oil. Oil pressure maintaining device.