Piston for large sized internal combustion engine

A technology for internal combustion diesel engines and pistons, applied to pistons, mechanical equipment, engine components, etc., can solve unwanted problems

Active Publication Date: 2014-12-10
COMPONENTA FINLAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the reliability of these large engines must also be improved, i.e. any failure in operation is particularly undesirable

Method used

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  • Piston for large sized internal combustion engine
  • Piston for large sized internal combustion engine
  • Piston for large sized internal combustion engine

Examples

Experimental program
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Embodiment Construction

[0041] exist figure 1 In, a piston 1 for an internal combustion diesel engine is shown, the piston 1 has a piston diameter D of 180 to 650 mm, the piston 1 comprises a top part 2 and a body part 3 connected to each other,

[0042] - the top part 2, when mounted in the engine cylinder, defines the piston side of the combustion chamber; and

[0043] - The main body part 3, which has an orifice 30 for the piston pin 4 (not shown, only the position is shown), a boss 32 for distributing the force between the piston 1 and the piston pin when in use, the main part 3 has an interior 33 , an exterior surface 34 and an operable connection surface 35 . For illustration purposes, the piston 1 is shown here in partial cross-section so that the different parts can be seen more easily.

[0044] exist figure 2 In , the body part 3 of the piston 1 is shown so that the interior of the body part can be seen. The interior 33 of the body part 3 comprises an inner wall 330 (or surface) having ...

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Abstract

A piston (1) for internal combustion diesel engine having a piston diameter (D) of 180 to 650 mm, the piston (1) comprising a top part (2) and a body part (3) connectable to each others, - the top part (2) defining, when installed in a cylinder of the engine, the piston (1) side of a combustion chamber, and - the body part (3) having an aperture (30) for a gudgeon pin (4), bosses (32) for distributing forces, when in use, between the piston (1) and the gudgeon pin (4), the body part (3) having an interior (33), an outer surface (34) and operable connecting surfaces (35). The interior (33) of the body part (3) comprises an interior wall (or surface) (330) having a macro geometry of wavy (331) surface, where a length (L) of a wave (331) is 3 to 25 mm and a height (h) of a wave (331) is 0,3 to 3 mm, the wavy surface having a micro geometry measurable as a surface roughness of 5 to 9 mum.

Description

technical field [0001] The invention relates to a piston for an internal combustion diesel engine, the piston having a piston diameter of 180 to 650 mm, the piston comprising a top part and a body part connectable to each other, [0002] - the top portion defines a piston side of a combustion chamber when mounted in a cylinder of an engine; and [0003] - The main body part has an orifice for a gudgeon pin, a boss for distributing force between the piston and the gudgeon pin in use, the main body part has an inner, an outer surface and an operable connection surface. Background technique [0004] Large internal combustion engines are widely used in demanding power supply tasks in power plants, as power sources for ship propulsion systems, etc. [0005] In large internal combustion engines there is an increasing need to generate more power from the engine with the same cylinder displacement. The aim is to increase the power rate and at the same time reduce the emissions due...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F3/00
CPCF02F3/0023B23P15/10F05C2201/021F02F3/0069
Inventor S.皮斯雷T.雷恩斯科格
Owner COMPONENTA FINLAND
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