Automobile engine cylinder body made of high silicon rare earth aluminum alloy

Abstract

The invention relates to an automobile engine cylinder body made of high silicon rare earth aluminum alloy, which overcomes the problems of complicated manufacture technology, high manufacture cost and poor lubrication effect in the course of working because a cylinder sleeve is embedded or a layer of abrasion-proof material is coated on the inner wall of the cylinder barrel of the cylinder body.The automobile engine cylinder body is characterized in that the cylinder body, the cylinder barrel and the inner wall of the cylinder barrel are an integrated structure integrally cast adopting the same high silicon rare earth aluminum alloy materials; and heat radiation wings are arranged on the periphery of the external side of the cylinder body. The cylinder body has the advantages of realizing a thin wall cylinder barrel without imbedding the cylinder sleeve and adding coating on the inner wall of the cylinder barrel, reducing total weight of the cylinder body, increasing heat radiation area, ensuring good heat radiation effect; an oil film is formed on the inner wall of the cylinder barrel in the course of working, thus abrasion resistance can be reduced, lubrication performance is improved, cylinder knocking is prevented, and production and imbedding procedures of the prior art are saved. Thus the invention has the advantages of simple manufacture technology, relatively lower manufacture cost and high reliability in the course of operation.

Description

technical field [0001] The invention belongs to the technical field of automobile engines, in particular to a high-silicon rare earth aluminum alloy automobile engine cylinder block. Background technique [0002] As mankind enters the 21st century, the automobile industry is facing more and more serious problems of energy, public hazards and safety. Governments around the world have successively formulated many regulations on energy protection, exhaust emissions, noise reduction and safety guarantees. For the automobile industry, the most effective way to save energy and reduce vehicle exhaust emissions is to reduce the quality of the vehicle itself, and the main way to reduce the quality of the vehicle is to reduce the weight of vehicle materials. According to relevant information, for every 100kg reduction in vehicle quality, fuel consumption can be reduced by about 0.7L. In order to reduce the weight of the car, lightweight materials must be used, and aluminum alloy mate...

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Problems solved by technology

[0006] The applicant disclosed "a high-silicon aluminum alloy and its preparation method" in the CN200810013125.2 patent. Using the high-silicon aluminum alloy provided by this patent can directly manufacture cylinders that do not require coatings and cylinder liners, but directly use this patent The provided high-silicon aluminum alloy material is used to make the engine block. Since the Si phase in the cast Al-Si alloy will grow into a massive or flaky brittle phase under natural growth conditions, it is easy to reduce the strength and plasticity of the high-silicon aluminum alloy. The friction coefficient between the inner wall of the cylinder body and the contact surface of the piston is relatively large during the operation of the cylinder block. In order to increase the lubrication effect, the consumption of lubricating oil during work is large. Favorable shape can improve the wear resistance of the cylinder block, which is more conducive to the production of better performance automobile engine cylinder blocks

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