Formula for piston of gasoline engine

Abstract

The formula of piston for petrol engine comprises (wt%) Si 11%-13%, Cu 0.8%-1.5%, Mg 0.8%-1.3%, Mn 0.01%-0.2%, Fe 0.01%-0.5%, Ni 1%-1.5%, Zn 0.01%-0.2%, Ti 0.01%-0.2%, Te 0.1%-0.4%, Li 0.01%-0.1%, Co0.01%-0.1% and the rest is Al. Said piston can reduce gap between piston and cylinder jacket, and its working surface layer contains special substance capable of firmly combining with engine oil, so taht its sealing and antifriction properties are good, and it can prolong the life of engine.

Description

technical field [0001] The invention relates to a formula of piston material, mainly a formula of gasoline engine piston. Background technique [0002] Most of the existing piston materials use ordinary 108 Al material or alloy. The disadvantage is that the expansion of the piston material is larger than that of the cylinder liner material at high temperature. The piston of this material determines the piston and cylinder. There must be a large gap between the sleeves, so the sealing performance is poor, the air leakage is serious, and even the cylinder is prone to knocking, which consumes the power of the engine and limits the life of the engine. Contents of the invention [0003] The technical problem to be solved by the invention is to provide a formula for gasoline engine pistons. [0004] The technical solution adopted by the present invention to solve its technical problems. The formula of this gasoline engine ...

AI Technical Summary

Problems solved by technology

[0002] Most of the existing piston materials use ordinary 108 Al material or alloy. The disadvantage is that the expansion of the piston material is larger than that of the cylinder liner material at high temperature. The piston of this material determines the piston and cylinder. There must be a large gap between the sleeves, resulting in poor sealing performance, serious air leakage, and even prone to cylinder knocking, which consumes the power of the engine and limits the life of the engine