Aluminum casting cylinder sleeve for gasoline engine

Abstract

The invention discloses an aluminum casting cylinder sleeve for a gasoline engine. The aluminum casting cylinder sleeve comprises a sleeve body, bosses and arc-shaped grooves. The annular bosses extending in the circumferential direction of the outer periphery wall of the sleeve body are arranged on the outer periphery wall of the sleeve body at intervals, the extending direction of the bosses is perpendicular to the generatrix of the outer periphery wall of the sleeve body, and the arc-shaped grooves are formed between the adjacent bosses. According to the aluminum casting cylinder sleeve for the gasoline engine, the annular bosses are arranged on the outer periphery wall of the sleeve body, due to the fact that the arc-shaped grooves are formed between the adjacent annular bosses, the side surfaces and bottom surfaces of the arc-shaped grooves are in smooth transition; accordingly, the flow resistance of molten aluminum is small, the molten aluminum flows into the arc-shaped grooves very easily, and air in the grooves is exhausted forwards; the die-casting effect of the aluminum casting cylinder sleeve and aluminum alloy is better, and even under the condition that the preheating process of the aluminum casting cylinder sleeve is omitted, the aluminum casting cylinder sleeve and the aluminum alloy can also be combined more tightly; therefore, pores are not likely to be formed, the strength of the aluminum casting cylinder sleeve is higher, the quality is better, and energy can be saved.

Description

technical field [0001] The invention relates to a cylinder liner, in particular to a gasoline engine cast aluminum cylinder liner. Background technique [0002] Cylinder liners are generally centrifugally cast with phosphate-aluminum cast iron, and then die-cast at high temperature. The cylinder liner is tightly wrapped in the casting with aluminum alloy, and the cylinder liner and aluminum alloy are tightly combined to improve the strength of the cylinder liner. The outer surface of the existing cylinder liner is granular. Since the aluminum alloy water is relatively thick, in order to ensure the tight combination of the cylinder liner and the aluminum alloy, during die-casting production, the cylinder liner is preheated to 280°C with high-frequency equipment, and then Putting it into a mold for die-casting requires high equipment investment and energy consumption, and the combination between the cylinder liner and the aluminum alloy is not tight enough, which is prone to c...

AI Technical Summary

Problems solved by technology

The outer surface of the existing cylinder liner is granular. Since the aluminum alloy water is relatively thick, in order to ensure the tight combination of the cylinder liner and the aluminum alloy, during die-casting production, the cylinder liner is preheated to 280°C with high-frequency equipment, and then Putting it into the mold for die-casting, the equipment investment and energy consumption are high, and the combination between the cylinder liner and the aluminum alloy is not tight enough, which is prone to cracks and pores, which affects the performance of the cylinder liner

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