Aluminum alloy piston for internal combustion engine

An aluminum alloy, internal combustion engine technology, applied in pistons, mechanical equipment, engine components, etc., can solve the problems of poor thermal insulation, poor quality consistency, poor thermal shock resistance, etc., achieve good thermal insulation performance, avoid piston top melting, Good ablation resistance

Inactive Publication Date: 2014-11-05
GUANGXI YUCHAI MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide an aluminum alloy piston for an internal combustion engine, so as to overcome the defects of poor heat insulation, poor thermal shock resistance, and poor quality consistency of the top of the aluminum alloy piston treated by the anodic oxidation surface treatment process

Method used

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  • Aluminum alloy piston for internal combustion engine
  • Aluminum alloy piston for internal combustion engine
  • Aluminum alloy piston for internal combustion engine

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Embodiment Construction

[0019] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0020] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

[0021] like figure 1 As shown, the center of the top of the aluminum alloy piston 1 of the internal combustion engine according to the specific embodiment of the present invention is provided with a circular groove 12 for forming a part of the combustion chamber.

[0022] In order to make the aluminum alloy piston 1 have higher heat resistance, the top and groove 12 of the aluminum alloy piston 1 are surface treated by a m...

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Abstract

The invention discloses an aluminum alloy piston for an internal combustion engine. A groove for forming a part of a combustion chamber is arranged at the top of the aluminum alloy piston and ceramic films are arranged on the top face of the aluminum alloy piston and the inner wall of the groove. The ceramic film on the top of the internal combustion engine disclosed by the invention is 2-3 times as thick as an anode oxide film. The aluminum alloy piston is good in heat-insulating property, and under a same heat-insulating test condition, the heat-insulating temperature of the heat-insulating film is about 15 DEG C higher than that of the anode oxide film. The aluminum alloy piston is good in ablation resistance, can resist instantaneous high temperature at 2500 DEG C and is not melted at the high temperature for 20 seconds. The bonding strength of the ceramic film and an aluminum alloy base body reaches up to 40MPa, so that the ceramic film does not fall.

Description

technical field [0001] The invention relates to the field of engines, in particular to an aluminum alloy piston of an internal combustion engine. Background technique [0002] With the upgrading of engine emission regulations, the temperature and pressure requirements of the combustion chamber of engine aluminum alloy pistons are getting higher and higher, especially for gas engines fueled by natural gas and liquefied petroleum gas, the heat load of aluminum alloy pistons is higher, and aluminum alloy pistons Major failures such as roof melting and cracking often occur, which seriously affect the reliability of the engine. One method to solve the above problems in the prior art is to use an anodic oxidation surface treatment process to process the top of the aluminum alloy piston, so that the combustion chamber and the top surface of the aluminum alloy piston generate a layer of Al in an amorphous phase. 2 o 3 oxide layer, improving its heat resistance. [0003] However, ...

Claims

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Application Information

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IPC IPC(8): C25D11/04C25D11/18F02F3/12
Inventor 黄传刚吕昂杨维沛苏怀林赵添常岑举钟韬黄保勉
Owner GUANGXI YUCHAI MASCH CO LTD
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