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Cylinder head

A cylinder head and cylinder technology, applied in the direction of cylinder head, cylinder, exhaust device, etc., can solve the problems of insufficient cooling of the partition wall, easy temperature rise, insufficient cooling performance of the cylinder head, etc. The effect of temperature rise and effective cooling

Pending Publication Date: 2021-07-30
MITSUBISHI MOTORS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In addition, even with such a structure in which the upper passage and the lower passage are independent, the cooling performance of the cylinder head is not sufficient, and further improvement is required.
[0010] For example, when a partition wall for suppressing exhaust interference between adjacent exhaust ports is provided on the cylinder head, the temperature of the partition wall is affected by the exhaust gas flowing through the plurality of exhaust ports. easier to rise
Therefore, even if the upper channel is independent from the lower channel, the dividing wall may not be sufficiently cooled

Method used

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Examples

Experimental program
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Embodiment Construction

[0059] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0060] Figure 1A It is a diagram showing the upper surface of the cylinder head (the surface opposite to the cylinder block mounting surface), Figure 1B It is a figure showing the side surface of the front side of a cylinder head. figure 2 It is a sectional view of the cylinder head along line A-A'. in addition, image 3 It is a perspective view showing the shape of the water cooling jacket as the shape of the sand core. Figure 4 is the upper surface diagram showing the shape of the water cooling jacket, Figure 5 It is a bottom view showing the shape of the water cooling jacket. in addition, Figure 6A , Figure 6B as well as Figure 7 It is a figure explaining the passage part in the wall, Figure 6A is the sectional view of the cylinder head along the line B-B', Figure 6B It is an enlarged cross-sectional view near the channel part in the wa...

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Abstract

The present invention relates to a cylinder head. A cooling water passage of the cylinder head of a multi-cylinder engine includes an upper passage disposed above a gathering exhaust port; and a lower channel which is arranged below the gathering exhaust port in a manner of being opposite to the upper channel. One of the upper channel and the lower channel has a first in-wall channel portion that is provided within the partition wall and extends toward the other of the upper channel and the lower channel. According to the cylinder head, exhaust interference is suppressed by the partition wall, and cooling water is circulated in the cooling water channel, thereby improving cooling performance.

Description

technical field [0001] The present disclosure relates to a cylinder head of a multi-cylinder engine, in particular, to a structure of a cooling water channel (water cooling jacket) provided inside the cylinder head. Background technique [0002] Conventionally, in a cylinder head of a multi-cylinder engine, a plurality of exhaust ports corresponding to each cylinder are formed. An exhaust manifold is connected to the cylinder head. The exhaust manifold has a plurality of exhaust passages connected to the respective exhaust ports, and the exhaust passages are merged in the exhaust manifold. [0003] In addition, in the cylinder head, a multi-cylinder engine has been developed by forming an exhaust collection portion that gathers a plurality of exhaust ports corresponding to each cylinder, and the multi-cylinder engine is configured by connecting a single exhaust pipe to the cylinder head . [0004] Such a cylinder head becomes high temperature due to the influence of exhaus...

Claims

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Application Information

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IPC IPC(8): F02F1/36F02F1/38F02F1/42F01N13/10F01P3/02
CPCF02F1/42F01P3/02F02F1/36F01N13/10F02F1/38
Inventor 松本浩一吉原昭佐野孝幸
Owner MITSUBISHI MOTORS CORP
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