Top-reinforced piston for light engine
A technology for engines and pistons, which is applied in the direction of engine components, machines/engines, pistons, etc., can solve problems such as insufficient mechanical properties of aluminum alloy materials, and achieve the effect of enhancing strength and rigidity
Pending Publication Date: 2020-05-22
AVL LIST TECHN CENT SHANGHAI
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Problems solved by technology
[0003] Aluminum alloy materials have the advantages of low density, light weight, and good heat transfer, but the mechanical properties of aluminum alloy materials are slightly insufficient under higher mechanical loads, especially the tensile strength and compressive strength
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Embodiment Construction
[0016] refer to figure 1 Shown: figure 1 It is a top-reinforced piston for a light-duty engine according to the present invention, including: the outer body 10 of the piston structure, the outer body 10 of the piston structure is aluminum alloy, the outer body 10 of the piston structure is embedded with a titanium alloy or cast iron reinforcement structure 20, the piston structure The outer body 10 is located below the piston combustion chamber. During casting, the reinforcement structure 20 is firstly heated and then placed in the mold. The aluminum alloy material is poured externally, and the combination of the two materials is realized after cooling.
[0017] Further improved, the shape of the top of the reinforcement structure 20 matches the shape of the piston combustion chamber; the shape of the piston combustion chamber is three types: flat top, pit, and convex top, and the corresponding design of the top shape of the reinforcement structure 20 can be flat top and conca...
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The invention discloses an aluminum alloy piston with a top-reinforced structure. The piston comprises an inner part and an outer part, an outer main body is made of aluminum alloy, a titanium alloy or cast iron reinforcing structure is embedded in the lower part of a combustion chamber. In order to achieve higher heat efficiency, a modern engine tends to use a larger and larger compression ratio,the larger compression ratio can bring larger explosion pressure, the piston top needs to bear higher mechanical loads and thermal loads, in order to bear higher and higher mechanical loads, the aluminum alloy material of the piston top needs to be thicker and thicker, and the titanium alloy or cast iron reinforcing structure is embedded in the piston, so that the overall rigidity and strength ofthe piston top can be enhanced, the maximum stress of the piston top under the extreme working condition is reduced, the thickness of the piston top material is reduced, and piston deformation is reduced.
Description
【Technical field】 [0001] The invention relates to a top reinforced piston for a light engine, which relates to the technical field of engine pistons. 【Background technique】 [0002] In order to achieve higher thermal efficiency and lower fuel consumption indicators, newly developed engines tend to adopt higher and higher compression ratios. Higher compression ratios bring higher thermal efficiency to gasoline engines, but also bring greater pressure to pistons. Greater gas burst pressure, which subjects the piston to higher mechanical loads and thermal deformations. At present, the pistons of light engines are all made of aluminum alloy. In order to adapt to higher and higher loads, the strength and rigidity of the piston crown can only be increased by thickening the material. [0003] Aluminum alloy materials have the advantages of low density, light weight, and good heat transfer, but the mechanical properties of aluminum alloy materials are slightly insufficient under hi...
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IPC IPC(8): F02F3/00F02F3/26F02F3/28
CPCF02F3/0084F02F3/26F02F3/28F02F2003/0007
Inventor 李伟苏飞飞
Owner AVL LIST TECHN CENT SHANGHAI