KR20090064015A - Cylinder head and exhaust system - Google Patents

Abstract

A cylinder head and an exhaust system are provided to improve performance of the engine and space utilization of the engine room. A cylinder head and an exhaust system comprises an exhaust manifold unit which is formed inside the cylinder head. The exhaust manifold unit comprises first, second, third, fourth, fifth and sixth exhaust manifolds(210~260) connected to first, second, third, fourth, fifth and sixth exhaust ports. The first and second exhaust manifolds are connected to each other and form a first connector(270). The fifth and sixth exhaust manifolds are connected to each other and form a second connection part(280). The first connector is connected to the third exhaust manifold. The second connector is connected to the fourth exhaust manifold.

Description

CYLINDER HEAD AND EXHAUST SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder head and an exhaust system, and more particularly, to a cylinder head and an exhaust system capable of constructing an exhaust system in a cylinder head to improve a cooling effect and to shorten a production process.

A typical vehicle engine is an internal combustion engine, which has a system for discharging exhaust gas combusted in a cylinder, which is called an exhaust system.

According to a conventional exhaust system, an exhaust port is formed in the cylinder head so that exhaust gas of the cylinder is discharged through the cylinder head. Exhaust gases from a plurality of exhaust ports of the multicylinder engine are collected through an exhaust manifold and supplied to a catalytic converter.

Typically, the exhaust manifold is mounted to one side of the cylinder head via a flange, and the exhaust gas discharged from each combustion chamber of the engine is collected through an exhaust pipe integrally formed with each runner connected to each port and discharged to the catalytic converter side.

Such an exhaust manifold is typically made of a member separate from the engine and coupled to the engine by bolts or the like. Exhaust manifolds that connect multiple exhaust ports to one catalytic converter occupy a large volume. In addition, when the flow path of the exhaust manifold is to be joined step by step to improve the engine performance, the appearance of the exhaust manifold becomes complicated, which makes it difficult to bolt to the engine.

That is, the runners of the cylinders each join in one exhaust pipe and are connected to the catalytic converter. However, due to the confluence, the exhaust manifold has a complicated structure, and it is difficult to fasten bolts to the mounting holes of the flange due to interference between each runner and the exhaust pipe.

In addition, the exhaust gas emitted from the cylinder is very hot. Accordingly, a water jacket is formed in the cylinder head through which the exhaust gas first passes, so that the cylinder head is not overheated.

However, since the exhaust manifold is exposed to the outside and formed of a member separate from the engine, the exhaust manifold is not cooled by a water jacket or the like but is cooled only by the flow of air.

If the exhaust system for exhaust gas from the cylinder to the catalytic converter can be mechanically and compactly formed, the engine room space can be efficiently utilized. In addition, if an exhaust system capable of improving durability without drastically dropping the temperature of the exhaust gas down to the catalytic converter is expected, it is expected that the performance and durability of the engine can be improved together.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide a cylinder head and an exhaust system of a multi-cylinder engine that can improve the performance of the engine and the space utilization of the engine room. .

In addition, the exhaust manifolds have a minimum curvature and merge with each other to prevent cracking due to thermal fatigue, and to ensure sufficient cooling with a minimum water jacket.

It is also an object of the present invention to provide a cylinder head and an exhaust system that can improve productivity with a simple configuration.

The cylinder head and the exhaust system according to the embodiment of the present invention may include a cylinder head provided in the engine, an exhaust port portion formed in the cylinder head, an exhaust manifold portion connected to the exhaust port portion and formed in the cylinder head.

Preferably, the engine is a six-cylinder engine, and the exhaust port part is formed of first, second, three, four, five, and six exhaust ports.

The exhaust manifold unit may include first, second, third, fourth, fifth, and sixth exhaust manifolds connected to the first, second, third, fourth, fifth, and sixth exhaust ports, respectively.

The first and second exhaust manifolds are connected to each other to form a first connection portion, the fifth and six exhaust manifolds are connected to each other to form a second connection portion, and the first connection portion is the third exhaust manifold. The second connector may be connected to the fourth exhaust manifold.

The first connection part and the second connection part may be spaced apart by a predetermined length to form an exhaust flange.

The set length can be 3mm to 15mm.

The first connection part and the second connection part may be formed to be bent at an angle set by the cylinder head.

It is preferable that the set angle is 30 ° to 60 °.

As described above, the cylinder head and the exhaust system according to the embodiment of the present invention provide a cylinder head and the exhaust system of a multi-cylinder engine that can improve the performance of the engine and the space utilization of the engine room.

In addition, the exhaust manifolds have a minimum curvature and coalesce with each other to prevent cracking due to thermal fatigue, and ensure sufficient cooling with a minimum water jacket.

In addition, it is possible to provide a cylinder head and an exhaust system that can improve productivity with a simple configuration.

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

1 is a view showing the configuration of the cylinder head and the exhaust manifold of the exhaust system according to an embodiment of the present invention, Figure 2 is a planar cross-sectional view showing the cylinder head and the cylinder head of the exhaust system according to an embodiment of the present invention, 3 is a partial cross-sectional side view of a cylinder head and an exhaust system according to an embodiment of the present invention.

1 to 3, the cylinder head and the exhaust system according to an embodiment of the present invention, the cylinder head 100 provided in the engine 10, the exhaust port portion formed in the cylinder head 100, the exhaust port And an exhaust manifold portion 200 formed in the cylinder head in connection with it.

The engine 10 is a six-cylinder engine, and the exhaust port portion includes the first, second, third, fourth, fifth, and sixth exhaust ports 110, 120, 130, 140, 150, and ( 160).

The exhaust manifold unit 200 is connected to the first, second, third, fourth, fifth, and sixth exhaust ports 110, 120, 130, 140, 150, and 160, respectively. First, second, third, fourth, fifth, sixth exhaust manifolds 210, 220, 230, 240, 250, and 260.

The first and second exhaust manifolds 210 and 220 are connected to each other to form a first connection part 270, and the fifth and sixth exhaust manifolds 250 and 260 are connected to each other to form a second connection. A connection part 280 is formed, the first connection part 270 is connected to the third exhaust manifold 230, and the second connection part 280 is connected to the fourth exhaust manifold 240.

The first and second exhaust manifolds 210 and 220 and the third exhaust manifold 230 may be softly connected to minimize deformation due to thermal stress.

The fifth and sixth exhaust manifolds 250 and 260 and the fourth exhaust manifold 240 may be smoothly connected to minimize deformation due to thermal stress. Design can be easy.

4 is a view showing the configuration of the flange of the cylinder head and the exhaust system according to an embodiment of the present invention.

Referring to FIG. 4, the first connection part 270 and the second connection part 280 are formed to be spaced apart by a set length to form an exhaust flange 300, and the set length is set to 3 mm to 15 mm.

As shown in the figure, the straight flange structure can increase the diameter of the exhaust manifold and improve durability.

The first connection part 270 and the second connection part 280 may be formed to be bent and extended from the cylinder head 100 at a set angle, and the set angle is set to 30 ° to 60 °.

The above structure is a structure in which the exhaust flow path of the outlet portion does not change rapidly, the structure is simple, the catalyst can be easily installed, and the weight can be reduced.

FIG. 5 is a view illustrating a mold for fabricating an exhaust manifold of a cylinder head and an exhaust system according to an embodiment of the present invention.

As shown in FIG. 5, the exhaust manifold portion of the cylinder head and the exhaust system according to the embodiment of the present invention has a simple structure, enables core fabrication in the same mold for one bank, and can be easily attached to the mold. Will have

Therefore, productivity increase and mold cost can be reduced.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and easily changed and equalized by those skilled in the art from the embodiments of the present invention. It includes all changes to the extent deemed acceptable.

1 is a view showing the configuration of an exhaust manifold portion of a cylinder head and an exhaust system according to an embodiment of the present invention.

2 is a planar cross-sectional view showing the cylinder head and the cylinder head of the exhaust system according to the embodiment of the present invention.

3 is a partial cross-sectional side view of a cylinder head and an exhaust system according to an embodiment of the present invention.

4 is a view showing the configuration of the flange of the cylinder head and the exhaust system according to an embodiment of the present invention.

FIG. 5 is a view illustrating a mold for fabricating an exhaust manifold of a cylinder head and an exhaust system according to an embodiment of the present invention.

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

10: engine 100: cylinder head

110: first exhaust port 120: second exhaust port

130: third exhaust port 140: fourth exhaust port

150: fifth exhaust port 160: sixth exhaust port

200: exhaust manifold portion 210: first exhaust manifold

220: second exhaust manifold 230: third exhaust manifold

240: fourth exhaust manifold 250: fifth exhaust manifold

260: sixth exhaust manifold 270: first connection portion

280: second connection portion 300: exhaust flange

401: exhaust manifold mold

Claims (8)

A cylinder head provided in the engine; An exhaust port portion formed in the cylinder head; An exhaust manifold portion connected to the exhaust port portion and formed in the cylinder head; Cylinder head and exhaust system comprising a. In claim 1, The engine is a six-cylinder engine, and the exhaust port portion is formed of the first, second, third, fourth, fifth, sixth exhaust ports of the cylinder head and the exhaust system. In claim 2, The exhaust manifold part includes first, second, third, fourth, fifth and sixth exhaust manifolds connected to the first, second, third, fourth, fifth, and sixth exhaust ports, respectively. In claim 3, The first and second exhaust manifolds are connected to each other to form a first connection portion, The fifth and sixth exhaust manifolds are connected to each other to form a second connection portion, The first connection part is connected to the third exhaust manifold, And the second connecting portion is connected to the fourth exhaust manifold. In claim 4, And the first connecting portion and the second connecting portion are spaced apart by a set length to form an exhaust flange. In claim 5, And said set length is from 3mm to 15mm. In claim 4, And the first connection part and the second connection part are formed to be bent and extended at a predetermined angle from the cylinder head. In claim 7, And the set angle is 30 ° to 60 °.

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