Piston of alcohol fuel internal combustion engine

Abstract

The invention relates to a piston of an alcohol fuel internal combustion engine. At present, conventional gasoline engine pistons are corroded by alcohol fuel and combustion products thereof in the alcohol internal combustion engine, meanwhile, the compression ratio of the alcohol internal combustion engine is high, the burst pressure is large, the instantaneous temperature is high, the top of thegasoline engine piston and the head of a piston are easy to ablate at high temperature, and the heat isolation and heat resistance are poor. The piston of the alcohol fuel internal combustion enginecomprises a piston top (1), a piston head (2), a piston skirt (6) and a piston pin seat (8), wherein the piston top is a forming top, the section of the protruding portion is approximately in an ovaloid shape, and the remaining part of the piston top is of a flat top structure; the piston top is provided with a valve avoiding pit; the piston head is mainly composed of a rectangular fire bank, twogas ring annular grooves (3) and an oil ring annular groove (4); the two air ring annular grooves are filled with air rings for sealing and heat conduction; and the oil ring annular groove is placed into a combined oil ring for oil scraping, oil distribution and gas sealing assistance. The piston is applied to the alcohol fuel internal combustion engine.

Description

Technical field: [0001] The invention relates to a piston of an alcohol fuel internal combustion engine. Background technique: [0002] With the increasingly serious energy crisis and air pollution, the internal combustion engine industry is actively exploring clean alternative fuels. Alcohols are considered to be one of the most promising clean alternative fuels for internal combustion engines, because alcohols have similar physical and chemical properties to gasoline, and can be extracted from plants, which are renewable energy sources; alcohols have high octane numbers, good antiknock properties, and combustion products No pollution; the use of alcohol fuels can alleviate energy conflicts and reduce pollution, so alcohol fuels are currently being valued by various countries. [0003] Due to the high octane number of alcohols and good anti-knock performance, the internal combustion engine can adopt a higher compression ratio to increase the power and torque of the interna...

AI Technical Summary

Problems solved by technology

[0005] (1) At present, there are basically traditional gasoline and diesel internal combustion engine pistons in China, and the technology of alcohol fuel internal combustion engine pistons is basically blank

[0006] (2) Traditional gasoline engine pistons will be corroded by alcohol fuel and its combustion products in alcohol internal combustion engines

[0007] (3) Alcohol internal combustion engines have high compression ratio, high explosion pressure, and high instantaneous temperature. The piston top and piston head of traditional gasoline engines are easily ablated at high temperatures, and have poor temperature insulation and heat resistance

[0008] (4) Alcohol fuel and its combustion products will dilute and deteriorate the lubricating oil in the cylinder bore, and the lubricity and cooling performance of the traditional piston in the cylinder will decrease, which will easily cause failures such as cylinder scuffing

[0009] (5) The traditional gasoline engine piston has a large relative mass, low mechanical strength, and can withstand low burst pressure

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