KR0128328Y1 - Oil path structure for cylinder head - Google Patents

Abstract

By venting oil bubbles during engine operation, it reduces valve noise and prevents all oil in the cylinder head oil passages from draining by siphoning when the oil is drained when the engine is stopped, thus delaying the oil supply when the engine is restarted. For the purpose of preventing oil from being carried out smoothly;

A chamber formed between the main passage and the head bolt gap to collect engine oil; An orifice having an air passage for supplying external air to the chamber to form atmospheric pressure; An oil passage formed below the chamber and in communication with the head bolt gap; It provides a cylinder head oil passage structure comprising an oil pipe in which the upper end is fitted higher than the horizontal height of the main passage to the oil passage.

Description

Oil passage structure of cylinder head

1 is a plan view of a cylinder head for explaining the oil passage structure of the cylinder head according to the present invention.

2 is a cross-sectional view taken along the line A-A of FIG.

3 is a sectional view taken along the line B-B in FIG.

4 is a cross-sectional view taken along the line C-C in FIG.

5 is a cross-sectional view of a conventional oil passage seen from the line B-B in FIG.

* Explanation of symbols for main parts of the drawings

1: cylinder head 2: cylinder block

4,8,16a, 18a, 18b: Oil passage 9a, 9b, 9c: Main passage

12,13: oil drain passage 21: oil chamber

22: air passage 23: orifice

24: oil pipe

[Industrial use]

The present invention relates to the structure of the cylinder head oil passage of the engine, and more specifically, to discharge bubbles contained in the oil during operation of the engine and at the same time, the oil in the oil passage of the cylinder head when the engine is stopped by the siphon phenomenon. It is all about the oil passage structure of the cylinder head to prevent draining to the oil pan.

[Prior art]

As the engine rotates, many frictional movements are performed, and part of the output is converted into frictional heat, which is consumed unprofitably, and also causes wear of each part.

Therefore, it is very important to lubricate each rotating part and the active part. When lubricating the engine, it is pushed into each active part and the rotating part and gamma action, cooling action, air tight action, anticorrosive action, clean action, noise reduction action. And tappet operation of each valve.

During operation of the engine, the oil pump pumps the oil from the oil pan through the strainer to supply oil to the engine parts, where the oil is sent to the filter and filtered while maintaining a constant pressure. The circulation takes place in the process of being supplied, lubricated and returned to the oil pan.

5 is a cross-sectional view showing an oil passage for oil supply and drain of a conventional cylinder head, wherein the cylinder head 1 includes an oil main passage 3 formed in a cylinder block 2, not shown, and a cylinder block. The exhaust side communicating with an oil passage 4 formed to communicate with the main passage 3 and a gap 8 between the head bolt and the cylinder head, and an oil sub passage formed through the oil passage 19 in the cylinder head. An oil main passage 9a and an intake side main passage 9b are formed, and the exhaust side main passage 9a and the exhaust side main passage 9b communicate with each other through an oil passage 9c.

The oil pumped at a constant pressure by the oil pump rises through the oil passage 4 between the gaps 8 of the head bolts and is sent to the main passages 9a and 9b through the oil passage 19, and the main passage. (9a) is supplied to the valve opening and closing mechanism through a known oil passage not shown in (9b).

After the lubrication action, the oil supplied to each friction part through the above path is returned to the oil pan through the oil jacket 11 and the oil drain passages 12 and 13 again.

[Problem to solve]

However, in the oil passage structure, bubbles are generated until they are drained to an oil pan, and these bubbles are mixed in the engine oil so that the function of the oil is not sufficiently exerted, thereby greatly causing metal friction noise.

When the engine is stopped, the oil to the cylinder head is stopped and the oil supplied to each oil passage is drained to the oil pan due to the siphon phenomenon. When the engine is restarted, the parts of the engine are operated but the oil supply is delayed. Sintering of each part leads to engine failure.

The present invention is devised to solve these problems, the object of the present invention is to form a chamber in a predetermined place of the oil passage to discharge air bubbles in the oil passing through the chamber during the engine operation, the external When the oil is drained by forming the air passage to supply air, the siphon phenomenon is prevented, so that the proper amount of oil remains in the main passage in the cylinder head, thereby improving the problem of oil supply delay when starting the engine, thereby reducing the valve tappet operation noise It is to provide an oil passage structure of the cylinder head which can eliminate the engine failure and also prevent the engine failure due to ignition.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a chamber communicating obliquely with an oil jacket on one side of a sub passage between a cylinder head bolt gap and an oil passage;

An inclined oil passage communicating with the bolt gap formed in the chamber;

An oil pipe fitted into the inclined oil passage and having an upper end thereof higher than a horizontal position of the oil main gallery;

It is characterized in that it provides a cylinder head oil passage structure including an orifice for closing the chamber hole on the upper side of the oil pipe and supplying air to the oil chamber to form a thin hole to prevent the siphon shape.

[Action]

According to the above configuration, during operation of the engine, when the oil is sent to the oil main passage through the chamber through the gap between the head bolts and is supplied to each part of the engine, air bubbles contained in the oil are discharged through the air passage of the chamber, and At the time of shutdown, the oil in the cylinder head is drained. The air is supplied through the thin hole formed in the upper part of the cylinder head, so the pressure in the oil chamber is at atmospheric pressure, which prevents the siphon phenomenon when the oil is drained and is mounted higher than the oil passage. The pipe allows oil in the oil main passage to remain undrained.

EXAMPLE

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described in more detail.

1 to 4 are views showing an embodiment of the present invention, which is a side cross-sectional view showing an oil drain prevention structure according to the present invention, wherein the same parts as those in FIG. 5 are given the same reference numerals.

An oil supply passage 26 is formed from the oil main passage 9a toward the head bolt gap 8, and a chamber 21 having a large diameter obliquely formed from the oil jacket 11 on one side of the head bolt gap 8 is formed. On the lower side thereof, an inclined oil passage 25 having a small diameter is formed to communicate with the head bolt gap 8.

In the chamber 21 communicating with the oil jacket, an orifice 23 having an air passage 22 is formed at an upper side thereof, and an oil pipe 24 is fitted in the lower inclined oil passage 25 having a small diameter. Its upper end is mounted higher than the horizontal position of the main passage (9a).

Therefore, the engine oil always remains by the horizontal height of the upper end of the oil pipe 24, and when the oil is supplied, the oil rising by the pressure of the oil pump (not shown) passes between the head bolt gaps 8 and the oil Temporarily collected in the oil chamber 21 through the pipe 24 to remove the air bubbles mixed in the oil to be discharged to the air passage 22 of the orifice 23, the exhaust side main through the oil supply passage 26 It is sent to the passage (9a), the connecting passage (9c), the intake side main passage (9b), the cam shaft through the oil passage (16a, 16b) of FIG. After being supplied to the valve tappet through the journals 20a and 20b and the oil passages 18a and 18b of FIG. 2, lubrication and tappet action are performed, and then through the oil jacket 11, the oil drain passage 12 ( 13) is returned to the oil pan.

When the engine is stopped, the oil supply is stopped and the oil in the head bolt gap 8 and the oil passage 4 in the cylinder block is drained in the opposite direction to the oil supply due to its own weight, and the air passage of the orifice 23 As air enters through 22, the pressure in the oil chamber 21 maintains atmospheric pressure.

Therefore, the oil in the oil main passages 9a, 9b, and 9c is left intact by the height of the upper end of the oil pipe 24 since the siphon phenomenon occurs when the oil is drained.

Since the oil main galleries 9a, 9b and 9c communicate with each other throughout the cylinder head 1, the structure of this structure is installed only at one of the highest points of the oil passage before going to the main passage. The pressure in (9a) (9b) 9c becomes atmospheric pressure.

[effect]

As described above, the oil passage structure of the cylinder head according to the present invention is easy to install and there is no difficulty in operation, and also discharges bubbles mixed into the oil during operation of the engine, and in the oil passage of the cylinder head when the engine is stopped. Preventing oil from draining out extends the life of the engine by preventing valve tappet noise and frictional wear and seizure caused by oil supply delays when the engine is restarted.

Claims (2)

A chamber 21 formed between the main passage 9a and the head bolt gap 8 to collect engine oil; An air passage 22 is formed in communication with an oil jacket 11 which discharges air bubbles contained in the oil in the chamber 21 during operation of the engine and supplies atmospheric air to form atmospheric pressure when the oil is drained when the engine is stopped. An orifice 23; An oil passage 25 formed below the chamber 21 to communicate with the head bolt gap 8; Cylinder head oil passage structure comprising an oil pipe (24) in which the upper end is fitted to the oil passage (25) higher than the horizontal height of the main passage (9a). The oil passage structure of claim 1, wherein the chamber (21) is formed at an acute angle with the oil supply passage (26).