Cylinder device using optimal placement of fine protrusion for improved wear resistance

A technology of fine concavo-convex and cylinder device, applied in the direction of cylinder, cylinder head, engine components, etc., can solve the problems of increased engine oil consumption and increased wear and tear, and achieve the effect of reducing wear and improving wear resistance.

Active Publication Date: 2014-08-20
HYUNDAI DOOSAN INVIGORATE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] Therefore, due to the rocking motion at the second-order motion, the bore side walls BS, BS' are in direct contact not only with the piston ring R but also with the piston 20, so there is a problem that by direct contact caused by the rocking motion of the piston 20 And the amount of wear on the side walls BS and BS' of the cylinder bore is further increased
In response to this, recently, in order to improve engine fuel efficiency, the method of minimizing the tension of the piston ring R has been used, but there is a problem that if the tension of the piston ring R is reduced too much, the engine oil consumption will increase.

Method used

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  • Cylinder device using optimal placement of fine protrusion for improved wear resistance
  • Cylinder device using optimal placement of fine protrusion for improved wear resistance
  • Cylinder device using optimal placement of fine protrusion for improved wear resistance

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Embodiment Construction

[0059] Next, an air cylinder device having optimum fine unevenness arrangement and surface roughness according to the present invention will be described with reference to the drawings.

[0060] However, the cylinder bore side walls BS, BS' described below mean the surfaces that directly contact the piston 20 that performs linear reciprocating motion, such as figure 1 As shown, in the case of the type in which the cylinder liner 11 is not additionally inserted, the inner peripheral surface of the cylinder block 10 becomes the bore side wall BS.

[0061] On the contrary, in the case of the type in which the cylinder liner 11 is additionally inserted, the inner peripheral surface of the above-mentioned cylinder liner 11 becomes the cylinder bore side wall BS′, and various coatings ( In the case of not shown), the coating becomes the cylinder bore side wall.

[0062] Such as figure 2 As shown, the cylinder device of the present invention having the optimal micro-concave-convex...

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PUM

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Abstract

The present invention relates to a cylinder device which has an optimal placement of a fine protrusion and surface roughness. According to the present invention, the fine protrusion is processed in an optimal selection area on a cylinder bore surface so that lubrication characteristics are improved between a piston ring and the cylinder bore surface and the occurrence of wear on the cylinder bore surface and in the piston ring is reduced. The processing is performed in such a manner that the surface roughness of the cylinder bore surface is in an optimal state, and thereby engine oil consumption can be reduced.

Description

technical field [0001] The present invention relates to a cylinder device in which wear resistance is improved by optimally disposing fine unevenness by forming fine unevenness near the top dead center and near the bottom dead center of the piston in consideration of the operating environment of the internal combustion engine, thereby reducing the wear resistance caused by the wear resistance. Wear of the piston ring and the side wall of the cylinder bore caused by friction. [0002] In addition, the present invention relates to a cylinder device in which wear resistance is improved by optimal arrangement of fine unevenness, which can reduce secondary motion due to friction or the like during linear reciprocating motion of the piston, thereby reducing friction caused by direct contact with the piston. Wear from piston contact. [0003] In addition, it relates to a cylinder device having an optimal arrangement of fine asperities and surface roughness, which can be processed so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F1/00F02F1/18
CPCF02F1/20F16J10/02F02F1/004F16J10/04
Inventor 吴石柱金圣基韩圭奉
Owner HYUNDAI DOOSAN INVIGORATE CORP
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