JPH0742526A - Structure of breather chamber of engine - Google Patents

Abstract

PURPOSE:To realize compactness of the whole engine body by lowering the height of the cylinder head cover of an engine. CONSTITUTION:A breather chamber 26 is integrally provided above an exhaust manifold 14 connected to the cylinder head 1 of an engine. And then the breather chamber 26 and the inside of the cylinder head 1 are communicated mutually. The breather chamber 26 can be provided in this way on the side part of the cylinder head 1, and a distance between an air cleaner 7 and a spark plug cap 11 can be secured even if the air cleaner 7 is lowered. Consequently, compactness of the whole engine body can be realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a breather chamber provided in a blow-by gas passage of an engine.

[0002]

2. Description of the Related Art The so-called blow-by gas leaked from a combustion chamber of an engine through a gap between a piston ring and a cylinder wall into a crankcase contains a large amount of unburned hydrocarbon having strongly acidic water. Therefore, it cannot be released into the atmosphere as it is.

Therefore, conventionally, an engine of an automobile or the like is provided with a blow-by gas passage for recirculating the blow-by gas from the crankcase to the intake passage of the engine and again guiding it to the combustion chamber.

The flow of blow-by gas will be briefly described below with reference to FIGS. 17 to 19. The blow-by gas passes from a crankcase (not shown) through a gas passage provided in a wall portion of a cylinder block (not shown), and a blow-by gas passage 2 formed in an inner wall portion of the cylinder head 1 as shown in FIG. It is guided through the cylinder head cover 3 (see FIG. 18).

Inside the cylinder head cover 3, oil and blow-by gas are separated by a breather plate 4 provided above the cylinder head cover 3, and a breather pipe 6 and a hose (not shown) are passed from the breather chamber 5. Is led to the intake side.

That is, the blow-by gas is guided from the breather pipe 6 to the intake passage of the intake manifold 8 via the air cleaner 7, or directly to the intake passage of the intake manifold 8 without the air cleaner 7, and further there. Will be led to a combustion chamber (not shown) for re-combustion.

The oil separated by the breather plate 5 is oil for lubricating the intake rocker arm 10 scattered from the rocker shaft 9 and the like. The breather plate 5 is provided at the inlet of the breather chamber 4 so that such oil does not jump into the breather chamber 4.

Further, inside the breather pipe 6, a PCV is installed.
A valve (not shown) is provided to prevent blow-by gas from flowing backward.

In the figure, reference numeral 11 is a spark plug cap, reference numeral 12 is an oil inlet, and reference numeral 13 is an oil filler cap. Reference numeral 14 indicates an exhaust manifold, reference numeral 15 indicates an exhaust manifold gasket, and reference numeral 16 indicates an intake manifold gasket.

Reference numeral 17 indicates a carburetor, reference numeral 18 indicates a camshaft, reference numeral 19 indicates an exhaust rocker arm, reference numeral 20 indicates a rocker shaft fixing bolt, and reference numeral 21 indicates a spark plug. It is a hall.

Further, in FIG. 17, reference numeral 22 is a camshaft pulley, reference numeral 23 is a camshaft thrust spring, and reference numeral 24 is a cylinder head bolt.

As an OHV engine lubricating device,
Some are disclosed in Japanese Utility Model Publication No. 60-61421. According to the disclosure of this publication, a breather chamber formed on a side portion of a cylinder barrel of a crankcase is communicated with an inside of the crankcase by an oil return hole, and a rocker chamber above the cylinder head and the breather chamber are connected to each other. , The rocker chamber and the crankcase are communicated with each other through a divided breather passage of a push rod chamber.

As a breather device for a crankcase, there is one disclosed in Japanese Utility Model Laid-Open No. 61-171809. What is disclosed in this publication is that a blow-by gas passage is formed in a breather chamber that is partitioned and provided inside a peripheral wall of a crankcase, a gas relief valve is provided in an upper portion of the breather chamber, and further, inside the breather chamber. A baffle plate is provided to form a meandering passage.

[0014]

In the above-mentioned prior art, since the breather chamber is provided in the cylinder head cover, there is a problem that the cylinder head cover becomes high. If the breather chamber is provided in the cylinder head cover in this way and the engine is made more compact, the air cleaner etc. may overlap the cylinder head cover, and the distance between the spark plug cap and the air cleaner will become shorter. There was a risk of contact.

Further, if the oil injection port is provided on the cylinder head cover, the oil filler cap attached to the cylinder head cover protrudes above the cylinder head cover, which also raises the problem of increasing the cylinder head cover.

Further, in order to improve maintainability during oil injection, it is necessary to secure a space above and around the oil injection port. For this reason, the air cleaner etc. cannot be located above the cylinder head cover,
This also hindered downsizing of the entire engine.

The OHV engine lubrication device disclosed in Japanese Utility Model Laid-Open No. 60-61421 has a breather passage in the push rod chamber, so that the amount of return of blow-by gas to the intake side is small. There is.

Further, since the breather device for the crankcase disclosed in Japanese Utility Model Laid-Open No. 61-171809 has a breather chamber inside the crankcase, the breather chamber of the engine can be installed rather than the inside of the cylinder head cover. It is easy to suppress the height, but it is difficult to absorb all blow-by gas in the crankcase.Also, the breather chamber is equipped with a relief valve that adjusts the flow rate of blow-by gas, but the direction of the relief valve is up and down. However, it is difficult to adjust the flow rate of blow-by gas for long-term use.

The present invention has been made in order to solve the above-mentioned conventional problems, and lowers the overall height of the cylinder head cover by changing the mounting positions of the breather chamber and the oil inlet.
An object of the present invention is to provide a structure of an engine breather chamber that realizes a compact engine.

[0020]

As a means for solving the above problems, the present invention provides a breather chamber integrally with an upper portion of an exhaust manifold connected to a cylinder head of an engine, and the breather chamber and the cylinder head are integrated with each other. It is characterized by communicating with the inside.

Further, the present invention is characterized in that a breather chamber is integrally provided above the intake manifold connected to the cylinder head of the engine, and the breather chamber and the inside of the cylinder head are communicated with each other. .

Further, according to the present invention, a breather chamber is integrally provided on an upper portion of a manifold connected to a cylinder head of an engine, the breather chamber and the inside of the cylinder head are communicated with each other, and the breather chamber and the cylinder head are connected to each other. A breather plate formed by extending a manifold gasket at the connecting portion is provided.

Furthermore, according to the present invention, a breather chamber is integrally provided on an upper portion of a manifold connected to a cylinder head of an engine, the breather chamber and the inside of the cylinder head are communicated with each other, and the breather chamber and the cylinder head are connected to each other. A breather plate formed by extending a manifold gasket is provided at the connection portion of, and a lead portion is provided at the breather plate.

Further, according to the present invention, a breather chamber is integrally provided on an upper portion of an exhaust manifold connected to a cylinder head of an engine, the breather chamber and the inside of the cylinder head are communicated with each other, and an oil is injected into the upper portion of the breather chamber. An inlet is provided and an oil filler cap is attached to the oil inlet.

[0025]

According to the present invention, since the breather chamber is provided above the exhaust manifold and the breather chamber and the inside of the cylinder head are communicated with each other, the breather chamber can be provided on the side portion of the cylinder head. . This makes it possible to secure a distance between the air cleaner and the spark plug cap.

Further, according to the present invention, since the breather chamber is provided above the intake manifold and the breather chamber and the inside of the cylinder head are communicated with each other, the breather chamber can be provided on the side portion of the cylinder head. become.
This makes it possible to secure a distance between the air cleaner and the spark plug cap.

Further, according to the present invention, the breather chamber is provided above the manifold connected to the cylinder head, and the breather chamber and the inside of the cylinder head are communicated with each other. Therefore, the breather chamber can be provided on the side portion of the cylinder head. It will be possible. This makes it possible to secure a distance between the air cleaner and the spark plug cap.

Further, since the breather plate formed by extending the manifold gasket is provided at the connecting portion between the breather chamber and the cylinder head, the breather gas can surely separate the blow-by gas and the oil. It becomes possible to guide only the blow-by gas to the intake side.

Furthermore, according to the present invention, the breather chamber provided in the upper portion of the manifold communicates with the inside of the cylinder head, so that the breather chamber can be provided on the side portion of the cylinder head. This makes it possible to secure a distance between the air cleaner and the spark plug cap.

Further, since the lead portion is formed on the breather plate formed by utilizing the manifold gasket, which is provided at the connecting portion between the cylinder head and the breather chamber, this lead portion functions as a valve, and the blow-by gas It is possible to prevent the backflow of.

Further, according to the present invention, the breather chamber provided in the upper portion of the exhaust manifold is communicated with the inside of the cylinder head, an oil inlet is provided in the upper portion of the breather chamber, and an oil filler cap is attached to the oil inlet. Therefore, it becomes possible to provide the oil inlet and the oil filler cap attached to the oil inlet on the side portion of the cylinder head, and the oil filler cap does not project from the upper portion of the cylinder head cover.

Further, since the oil inlet is moved from the upper portion of the cylinder head cover to the upper portion of the breather chamber provided on the side portion of the cylinder head, an air cleaner or the like can be arranged so as to overlap with the cylinder head cover near the air cleaner. become.

[0033]

An embodiment of the present invention will be described below with reference to the drawings. The same members as those in FIGS. 17 to 19 are designated by the same reference numerals, and detailed description thereof will be omitted. In FIGS. 1 to 3, the reference numeral 1 indicates a cylinder head. Exhaust manifold 14 on the side of cylinder head 1
Are fixed by bolts 25.

A breather chamber 26 is provided above the exhaust manifold 14 integrally with the exhaust manifold 14. The side of the cylinder head 1 of the breather chamber 26 is open. Also, the breather chamber of the cylinder head 1
An opening 27 is also provided on the surface facing 26 (see FIG. 4).

Therefore, the exhaust manifold 14
When the cylinder head 1 is joined to the cylinder head 1, the cam chamber 28 of the cylinder head 1 communicates with the inside of the breather chamber 26. If the breather chamber 26 is provided above the exhaust manifold 14 as described above, it is not necessary to provide the breather chamber 26 inside the cylinder head cover 3.

A breather pipe 6 that connects the inside and outside of the breather chamber 26 is provided upright on the upper wall of the breather chamber 26. A hose (not shown) that connects to the intake passage of the intake manifold 8 via the air cleaner 7 or directly to the intake passage of the intake manifold 8 without the air cleaner 7 is connected to the breather pipe 6.

As a result, the blow-by gas flows from the cylinder head 1 through the breather chamber 26 to the intake passage, that is, the intake side.

The breather chamber 26 and the cylinder head 1
Sealing of the connection portion with and is performed by disposing an exhaust manifold gasket 29 made of a thin metal plate formed by extending the conventional exhaust manifold gasket 15 (see FIG. 18).

FIG. 4 shows an end portion of the cylinder head 1 to which the exhaust manifold 14 is attached, and reference numeral 30 shows a mounting flange portion of the exhaust manifold 14. The exhaust manifold gasket 29 is not attached to the flange portion 30 in this figure.

Since the present embodiment is constructed as described above, blow-by gas leaking from the combustion chamber of the engine into the crankcase through the gap between the piston ring and the cylinder wall is discharged from the crankcase to the cylinder block. It is guided to the cam chamber 28 of the cylinder head 1 through a gas passage (not shown) and a blow-by gas passage 2 (see FIG. 2) of the cylinder head 1.

Further, it is guided from the cam chamber 28 to the breather chamber 26 and from the breather pipe 6 to an intake passage such as the intake manifold 8 via a hose (not shown).

Since the breather chamber 26 provided above the exhaust manifold 14 is provided and the breather chamber 26 is communicated with the inside of the cylinder head 1, the breather chamber 26 is provided on the side of the cylinder head 1. Will be possible.

As a result, the distance between the air cleaner 7 and the spark plug cap 11 can be secured.

In the embodiment shown in FIG. 5, the breather chamber 26 is integrally provided on the upper part of the intake manifold 8,
Moreover, the breather chamber 26 and the cam chamber 28 of the cylinder head 1 are communicated with each other.

A breather pipe 6 is erected on the ceiling of the breather chamber 26, and a breather pipe 6 and an intake passage such as an intake manifold 8 are connected by a hose (not shown).

The connection between the breather chamber 26 and the cylinder head 1 is sealed by providing an intake manifold gasket 31 formed by extending the conventional intake manifold gasket 16 (see FIG. 18). The operation of this embodiment is substantially the same as that shown in FIGS.

Furthermore, in the embodiment shown in FIG. 6, a breather chamber 26 is integrally provided on the upper portion of the exhaust manifold 14 connected to the cylinder head 1 of the engine, and the breather chamber 26 and the cam chamber 28 of the cylinder head 1 are connected to each other. And the connection between the breather chamber 26 and the cylinder head 1 is sealed by an exhaust manifold gasket 32 formed by extending a conventional gasket 15 (see FIG. 18) (see FIG. 7).

This exhaust manifold gasket
A breather plate 33 is provided at 32 (a portion surrounded by a broken line).

The blazer plate 33 is provided with a blow-by gas passage hole 34 formed by cutting out in a U-shape. Note that FIG. 7 shows the exhaust manifold gasket 32 attached to the flange portion 30 (see FIG. 4) for attaching the exhaust manifold 14 of the cylinder head 1.

With this structure, the blow-by gas that has entered the cam chamber 28 of the cylinder head 1 from the gas passage of the cylinder block separates the oil and the blow-by gas at the breather plate 33 formed in the exhaust manifold gasket 32. Then, it is guided from the breather chamber 26 through the breather pipe 6 and a hose (not shown) to the intake passage such as the intake manifold 8.

As a result, the breather chamber 26 can be provided on the side portion of the cylinder head 1, and the air cleaner 7 can be provided.
It becomes possible to secure a distance between the spark plug cap 11 and the spark plug cap 11.

In the embodiment shown in FIG. 8, a breather chamber 26 is integrally provided above the intake manifold 8 connected to the cylinder head 1 of the engine, and the breather chamber 26 and the cam chamber 28 of the cylinder head 1 are communicated with each other. In addition, the seal of the connecting portion between the breather chamber 26 and the cylinder head 1 is performed by the intake manifold gasket 35 formed by extending the conventional gasket 16 (see FIG. 9).

This intake manifold gasket 35
Is provided with a breather plate 33 (a portion surrounded by a broken line).

The blazer plate 33 is provided with a blow-by gas passage hole 34 formed by cutting out in a U-shape. FIG. 9 shows the intake manifold gasket 35 attached to the flange portion 30 for attaching the intake manifold 8 of the cylinder head 1. The operation of this embodiment is substantially the same as that shown in FIGS.

In the embodiment shown in FIG. 10, a breather chamber 26 is integrally provided above the exhaust manifold 14 connected to the cylinder head 1 of the engine, and the breather chamber 26 and the cam chamber 28 of the cylinder head 1 are communicated with each other. Moreover, the sealing of the connecting portion between the breather chamber 26 and the cylinder head 1 is performed by the exhaust manifold gasket 29 formed by extending the conventional gasket 15 (see FIG. 18).

Further, a breather plate 33 for separating oil and blow-by gas is provided inside the breather chamber 26 (see FIG. 11).

Since this embodiment is constructed in this way, the blow-by gas leaking into the crankcase passes from the crank chamber through the gas passage (not shown) of the cylinder block and the blow-by gas passage 2 of the cylinder head 1. It is guided to the cam chamber 28 of the cylinder head 1.

From the cam chamber 28, a breather plate 33 provided inside the breather chamber 26 separates oil and blow-by gas from the breather chamber 26, and then the breather pipe 6
And is guided to the intake passage such as the intake manifold 8 through the hose.

Since the breather chamber 26 provided in the upper portion of the exhaust manifold 14 and the inside of the cylinder head 1 are communicated with each other in this manner, the breather chamber 26 can be provided on the side portion of the cylinder head 1. This makes it possible to secure a distance between the air cleaner 7 and the spark plug cap 11.

In the embodiment shown in FIG. 12, a breather chamber 26 is integrally provided above the exhaust manifold 14 connected to the cylinder head 1 of the engine, and the breather chamber 26 and the cam chamber 28 of the cylinder head 1 are communicated with each other. At the same time, the exhaust manifold gasket 32 formed by extending the conventional gasket 15 is provided at the connecting portion between the breather chamber 26 and the cylinder head 1, and further, the breather plate 33 formed on the exhaust manifold gasket 32 is provided with the lead portion 36. It is a thing.

With this construction, the blow-by gas that has entered the cam chamber 28 of the cylinder head 1 from the gas passage of the cylinder block separates the oil and the blow-by gas at the breather plate 33 formed on the exhaust manifold gasket 32. Then, it is guided from the breather chamber 26 through the breather pipe 6 and a hose (not shown) to the intake passage such as the intake manifold 8.

Further, the breather plate 33 is provided with a lead portion 36.
Since the lead is formed, the lead portion 36 functions as a valve, and it becomes possible to prevent the backflow of blow-by gas.

Since the breather chamber 26 provided in the upper portion of the exhaust manifold 14 and the inside of the cylinder head 1 are communicated with each other in this manner, the breather chamber 26 can be provided on the side portion of the cylinder head 1.

As a result, the distance between the air cleaner 7 and the spark plug cap 11 can be secured.

In the embodiment shown in FIG. 13, a breather chamber 26 is integrally provided above the intake manifold 8 connected to the cylinder head 1 of the engine, and the breather chamber 26 and the cam chamber 28 of the cylinder head 1 are communicated with each other. At the same time, the intake manifold gasket 35 formed by extending the conventional gasket 16 (see FIG. 18) is provided at the connecting portion between the breather chamber 26 and the cylinder head 1, and the lead portion is provided on the breather plate 33 formed on the intake manifold gasket 35. 36 is provided. The operation of this embodiment is substantially the same as that shown in FIG.

In the embodiment shown in FIG. 14, the breather chamber 26 of the embodiment shown in FIG. 13 is not provided with the breather pipe 6, but the breather chamber 26 is directly connected to the intake manifold 8.
37 is provided. In this way, the breather pipe 6 and the hose can be omitted, and the cost can be reduced.

In the embodiment shown in FIGS. 15 and 16, a breather chamber 26 is integrally provided on the upper part of the exhaust manifold 14 connected to the cylinder head 1 of the engine, and the breather chamber 26 and the inside of the cylinder head 1 are communicated with each other. In addition, the oil inlet 12 is provided in the upper portion of the breather chamber 26, and the oil filler cap 13 is attached to the oil inlet 12.

The breather chamber 26 and the cylinder head 1
Sealing of the connection portion with and is performed by disposing an exhaust manifold gasket 29 made of a thin metal plate formed by extending the conventional exhaust manifold gasket 15 (see FIG. 18).

Since the present embodiment is configured as described above, the oil inlet 12 and the oil filler cap 13 attached to the oil inlet 12 can be provided on the side portion of the cylinder head 1, and the oil filler cap 13 can be provided. Does not project above the cylinder head cover 3.

In this way, the oil inlet 12 is moved from the upper portion of the cylinder head cover 3 to the upper portion of the breather chamber 26 provided at the side portion of the cylinder head 1.
It is possible to position the same and the like on the upper portion of the cylinder head cover 3.

[0071]

According to the present invention, since the breather chamber is provided above the exhaust manifold and the breather chamber and the inside of the cylinder head are communicated with each other, the breather chamber can be provided on the side portion of the cylinder head. , The distance between the air cleaner and the spark plug cap can be secured.

As a result, the overall height of the cylinder head can be lowered, and the engine can be made compact.

Since the breather chamber is provided in the upper part of the exhaust manifold, that is, in the side part of the cylinder head,
The breather chamber is no longer located in the direction of oil flow, and oil no longer directly jumps into the breather chamber. As a result, the breather plate can be eliminated and the cost can be reduced.

[0074] The present invention also relates to an intake manifold.
There is a breather chamber at the top of the
Since it communicates with the inside of the head, the breather chamber is
It can be installed on the side of the da head,
Can keep a distance with the spark plug cap
It

As a result, the overall height of the cylinder head can be lowered, and the engine can be made compact. In addition, the oil does not directly enter the breather chamber, the breather plate can be eliminated, and the cost can be reduced.

Further, according to the present invention, a breather chamber is provided above the manifold connected to the cylinder head, the breather chamber and the inside of the cylinder head are communicated with each other, and the manifold gasket is provided at the connecting portion between the breather chamber and the cylinder head. Since the breather plate formed by extending is provided, the breather chamber can be provided on the side portion of the cylinder head, and the distance between the air cleaner and the spark plug cap can be secured.

As a result, the overall height of the cylinder head can be lowered, and the engine can be made compact. Further, the blow-by gas and the oil can be reliably separated by the breather plate provided at the inlet of the breather chamber. This can prevent oil deterioration and reduce oil consumption.

Further, according to the present invention, the breather chamber provided in the upper portion of the manifold is communicated with the inside of the cylinder head,
A manifold gasket was provided at the connection between the cylinder head and the breather chamber, and the lead portion was formed on the breather plate of this gasket, so the breather chamber can be provided on the side of the cylinder head, and the air cleaner and spark plug cap The distance can be secured.

As a result, the overall height of the cylinder head can be lowered and the engine can be made compact. Further, since the lead portion functions as a valve, it is possible to prevent backflow of blow-by gas. As a result, the PCV valve can be omitted and the number of parts can be reduced.

Further, according to the present invention, the breather chamber provided in the upper portion of the exhaust manifold is communicated with the inside of the cylinder head, and the oil inlet is provided in the upper portion of the breather chamber, and the oil filler cap is attached to the oil inlet. Therefore, the oil inlet and the oil filler cap attached to the oil inlet can be provided on the side portion of the cylinder head, and the oil filler cap does not project from the upper portion of the cylinder head cover.

As a result, the overall height of the engine can be reduced and the engine can be made compact. Further, since the oil inlet is moved from the upper portion of the cylinder head cover to the upper portion of the breather chamber provided on the side portion of the cylinder head, an air cleaner or the like can be positioned over the upper portion of the cylinder head cover.

As a result, the degree of freedom of the installation location of the air cleaner can be increased and the engine can be made compact.

Further, a breather chamber larger than the breather chamber provided in the cylinder head cover can be provided.

When the exhaust side of the horizontally mounted engine faces the vehicle body, the serviceability is improved because the confirmation of the oil cap is improved when the engine hood is opened.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

2 is a top view of the cylinder head of FIG. 1. FIG.

FIG. 3 is a right side view of that of FIG.

FIG. 4 is a front view of an exhaust manifold mounting flange portion of a cylinder head.

FIG. 5 is a cross-sectional view showing another embodiment of the present invention.

FIG. 6 is a cross-sectional view showing a connecting portion between a breather chamber provided with a breather plate and a cylinder head.

FIG. 7 is a front view in which an exhaust manifold gasket is attached to the exhaust manifold mounting flange portion of FIG.

FIG. 8 is a sectional view showing still another embodiment of the present invention.

9 is a front view in which an intake manifold gasket is attached to a flange portion for mounting the intake manifold in FIG.

FIG. 10 is a sectional view showing still another embodiment of the present invention.

11 is a top view of the cylinder head shown in FIG.

FIG. 12 is a sectional view showing still another embodiment of the present invention.

FIG. 13 is a sectional view showing still another embodiment of the present invention.

FIG. 14 is a sectional view showing still another embodiment of the present invention.

FIG. 15 is a cross-sectional view showing an example in which an oil filler cap is provided on the upper part of the breather chamber.

16 is a right side view of that of FIG. 15. FIG.

FIG. 17 is a top view of a conventional cylinder head.

FIG. 18 is a cross-sectional view of a conventional cylinder head, a cylinder head cover, and the like.

FIG. 19 is a right side view of that of FIG. 18;

[Explanation of symbols]

 1 cylinder head 8 intake manifold 12 oil inlet 13 oil filler cap 14 exhaust manifold 26 breather chamber 29 exhaust manifold gasket 31 intake manifold gasket 32 exhaust manifold gasket 33 breather plate 35 intake manifold gasket 36 lead part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shuichi Kageda, 300, Takatsuka-cho, Hamamatsu-shi, Shizuoka Suzuki Stock Company (72) Inventor, Yoshihiko Ito, 300, Takatsuka-cho, Hamamatsu-shi, Shizuoka Suzuki Stock Company

Claims (5)

[Claims] 1. A structure of a breather chamber of an engine, characterized in that a breather chamber is integrally provided above an exhaust manifold connected to a cylinder head of the engine, and the breather chamber and the inside of the cylinder head are communicated with each other. 2. A structure of an engine breather chamber, characterized in that a breather chamber is integrally provided on an intake manifold connected to a cylinder head of the engine, and the breather chamber and the inside of the cylinder head are communicated with each other. 3. A breather chamber is integrally provided on an upper portion of a manifold connected to a cylinder head of an engine, the breather chamber and the inside of the cylinder head are communicated with each other, and the manifold is provided at a connecting portion between the breather chamber and the cylinder head. A breather chamber structure for an engine, characterized in that a breather plate formed by extending a gasket is provided. 4. A breather chamber is integrally provided on an upper portion of a manifold connected to a cylinder head of an engine, the breather chamber and the inside of the cylinder head are communicated with each other, and the manifold is provided at a connecting portion between the breather chamber and the cylinder head. A breather chamber structure of an engine, characterized in that a breather plate formed by extending a gasket is provided, and a lead portion is provided on the breather plate. 5. A breather chamber is integrally provided on an upper part of an exhaust manifold connected to a cylinder head of an engine, the breather chamber and the inside of the cylinder head are communicated with each other, and an oil inlet is provided on an upper part of the breather chamber. The structure of the breather chamber of the engine, wherein an oil filler cap is attached to the oil inlet.