Unlock instant, AI-driven research and patent intelligence for your innovation.

Cooling structure for internal combustion engine

A cooling structure and internal combustion engine technology, applied in the direction of engine cooling, liquid cooling, mechanical equipment, etc., can solve the problems of increased thermal stress at the outlet peripheral part of the cooling hole, difficulty in reducing wall thickness and light weight, etc., and achieve the goal of reducing wall thickness Effect

Inactive Publication Date: 2015-05-06
MITSUBISHI HEAVY IND LTD +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the cylinder liner disclosed in the above-mentioned Patent Document 1, the plan view shape of the outlet (wood cross-section) of the cooling hole (drilled hole: drill hole) located on the uppermost outer peripheral surface is as in the above-mentioned Patent Document 1. Figure 4 and Figure 7 The shape shown is elliptical, and the thermal stress on the outlet peripheral part of the cooling hole increases
Therefore, in the cylinder liner disclosed in the aforementioned Patent Document 1, it is difficult to reduce the wall thickness and achieve weight reduction.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cooling structure for internal combustion engine
  • Cooling structure for internal combustion engine
  • Cooling structure for internal combustion engine

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach 〕

[0054] Below, refer to Figure 1 to Figure 5 , the cylinder liner, the cylinder head, and the reinforcing metal parts according to the first embodiment of the present invention will be described.

[0055] figure 1 is a perspective view of the cylinder liner of the present embodiment, figure 2 is a cross-sectional view showing main parts of the cooling structure of the internal combustion engine of the present embodiment, image 3 Yes figure 2 III-III direction view, Figure 4 will be figure 2 The main part of the enlarged representation of the figure, Figure 5 Yes Figure 4 V-V direction view.

[0056] The cylinder liner, cylinder head and reinforcing metal parts of the present invention are suitable for internal combustion engines such as marine diesel engines, and a piston (not shown) is arranged inside, and the piston slides along its inner peripheral surface.

[0057] like Figure 1 to Figure 5 As shown in at least one figure of , the reinforcing metal device...

no. 2 approach 〕

[0090] refer to Image 6 , to describe a cylinder liner, a cylinder head, and reinforcing metal parts according to a second embodiment of the present invention.

[0091] Image 6 It is a view of the inner peripheral surface of the lower half of the reinforcing metal device of the present embodiment viewed from the center side of the reinforcing metal device, and is the same as Figure 5 same graph.

[0092] The reinforcing metal fitting 50 of this embodiment differs from the structure of the above-mentioned first embodiment in that a vertical groove (slanted groove) 51 is provided instead of the vertical groove 13 . The other structural elements are the same as those of the above-mentioned first embodiment, and therefore descriptions of these structural elements are omitted here.

[0093] In addition, the same code|symbol is attached|subjected to the same member as 1st Embodiment mentioned above.

[0094] The longitudinal groove 51 is a groove engraved (digged) from the in...

no. 3 approach 〕

[0098] refer to Figure 7 to Figure 11 , the cylinder liner, the cylinder head, and the reinforcing metal parts according to the third embodiment of the present invention will be described.

[0099] Figure 7 It is a cross-sectional view showing the main part of the cooling structure of the internal combustion engine of this embodiment, and is the same as figure 2 same picture, Figure 8 Yes Figure 7 The VIII-VIII view, Figure 9 will be Figure 7 The main part of the enlarged representation of the figure, Figure 10 Yes Figure 9 X-X direction view, Figure 11 Yes Figure 9 XI-XI direction view.

[0100] The reinforcing metal fitting 60 of this embodiment differs from the above-mentioned first embodiment in that a communication hole 61 is provided instead of the vertical groove 13 . The other structural elements are the same as those of the above-mentioned first embodiment, and therefore descriptions of these structural elements are omitted here.

[0101] In addi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A cooling structure for an internal combustion engine comprises: a cylinder liner (20) provided with first cooling bores (30) formed so as to extend obliquely upward from the outer peripheral surface toward the inside of the wall; and a cylinder cover (40) provided with second cooling bores (42) formed so as to extend obliquely upward from the outer peripheral surface toward the inside of the wall, the cylinder cover (40) being disposed on the upper part of the cylinder liner (20) and closing the opening located in the upper part of the cylinder liner (20). The cooling structure for an internal combustion engine also comprises a ring-shaped metallic reinforcing member (10) which is located at the joint between the cylinder liner (20) and the cylinder cover (40) so as to straddle both the cylinder liner (20) and the cylinder cover (40) and so as to be fitted over the outer peripheral surfaces of the cylinder liner (20) and the cylinder cover (40), the metallic reinforcing member (10) forming a cooling water path (11) between the metallic reinforcing member (10) and the outer peripheral surfaces of the cylinder liner (20) and the cylinder cover (40), the metallic reinforcing member (10) preventing the cylinder liner (20) from expanding outward in the radial direction during the operation of the internal combustion engine.

Description

technical field [0001] The present invention relates to a cooling structure of an internal combustion engine applied to an internal combustion engine such as a marine diesel engine. Background technique [0002] As a cooling structure of an internal combustion engine applied to an internal combustion engine such as a marine diesel engine, there is known a cylinder liner in which cooling holes (hereinafter referred to as "cooling holes") inclined with respect to a plane perpendicular to the cylinder axis are provided inside (inside the wall). hole") (for example, refer to Patent Document 1). [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Application Laid-Open No. 5-214933 [0006] Summary of the invention [0007] The problem to be solved by the invention [0008] However, in the cylinder liner disclosed in the above-mentioned Patent Document 1, such as Figure 13 As shown, the compressive stress becomes maximum on the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F02F1/10F01P3/02F02F1/16
CPCF01P3/02F01P2003/021F02F1/14F02F1/10F02F1/16
Inventor 音羽贵史石黑达男门胁刚国弘信幸川口夏辉
Owner MITSUBISHI HEAVY IND LTD