Cylinder device and manufacturing method thereof

Abstract

The invention relates to a cylinder device manufacturing method, which comprises the steps of a) prefabricating a ceramic cylinder liner with a porous structure; b) sintering or depositing a wear-resistant alloy layer on the inner surface of the ceramic cylinder liner; c) casting molten aluminum on the outer surface of the ceramic cylinder liner to form a cylinder body. The embodiment of the invention additionally provides a cylinder device which is manufactured by adopting the cylinder device manufacturing method. The cylinder device comprises the ceramic cylinder liner with the porous structure, the wear-resistant layer which is formed on the inner surface of the ceramic cylinder liner, and the cylinder body which is formed on the outer surface of the ceramic cylinder liner and is made of cast aluminum, wherein wear-resistant alloy which seeps inwards from the inner surface of the ceramic cylinder liner and the molten aluminum which seeps inwards from the outer surface of the ceramic cylinder liner are mutually interlaced in the ceramic cylinder liner. The cylinder device provided by the embodiment of the invention can be manufactured to be very thin, the axial dimension of an engine can be reduced, the miniaturization of the engine is facilitated and the manufacturing cost is lower.

Description

technical field [0001] The invention relates to a cylinder device suitable for an automobile engine and a manufacturing method thereof. Background technique [0002] At present, automobile engines generally use aluminum alloy cylinder blocks. In order to reduce the weight of the whole machine while ensuring the wear resistance of the cylinder liner, a cylinder liner structure made of cast iron is usually pre-cast in the cylinder block. The outer surface of the existing cylinder liner is generally machined to form grooves 10 (such as figure 1 shown) or in the form of cast mushroom barbs 20 (as figure 2 shown) to ensure a tight bond between the cast iron cylinder liner and the cast aluminum cylinder block to prevent the cylinder liner from falling off the cylinder block. However, a large amount of metal will be wasted by machining grooves, and in order to ensure that the cylinder liner is not deformed during processing, the cylinder liner must be very thick, which is not c...

AI Technical Summary

Problems solved by technology

However, a large amount of metal will be wasted by machining grooves, and in order to ensure that the cylinder liner is not deformed during processing, the cylinder liner must be very thick, which is not conducive to the lightweight and miniaturization of the engine; Due to problems such as the inability to draft the cylinder liner, the traditional casting process cannot be used, and the casting is difficult and costly

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