A New Type of Variable Compression Ratio Device for Internal Combustion Engine

Abstract

The invention belongs to internal combustion engine transformation equipment, and particularly relates to a novel internal combustion engine variable compression device which can improve the heat efficiency of an internal combustion engine. The device comprises a space adjusting motor, a stroke adjusting motor, space adjusting shafts, stroke adjusting shafts, a rocker shifting fork, stroke adjusting eccentric sliding sleeves, a space adjusting eccentric sliding sleeve, an air inlet adjusting sliding block and an exhaust adjusting sliding block, wherein the space adjusting eccentric sliding sleeves are mounted on the two sides of the positions, corresponding to cams of an air inlet camshaft and cams of an exhaust camshaft, of the inner sides of the space adjusting shafts; the air inlet adjusting sliding block is mounted in a sliding groove hole in the side where an air inlet manifold is mounted; the exhaust adjusting sliding block is mounted in a sliding groove hole in the side where an exhaust manifold is mounted; the space adjusting eccentric sliding sleeve is hinged to the upper portion of a sliding block adjusting connecting rod; and a cylindrical boss of a sliding block adjusting gland is connected with the lower portion of the sliding block adjusting connecting rod in a hinged mode. The position and stroke of an air valve are changed through an eccentric shaft device, so that the compression ratio of the internal combustion engine is adjusted, and the novel internal combustion engine variable compression device has the characteristics of being simple and reliable in structure, small in occupied space, high in practicability, capable of saving energy and the like.

Description

technical field [0001] The patent of the present invention belongs to internal combustion engine reconstruction equipment, and specifically relates to a new type of variable compression ratio device for internal combustion engines, which is a device for improving the thermal efficiency of internal combustion engines. Background technique [0002] As the main power source of today's automobiles, the internal combustion engine has been relatively mature after years of development, and its maximum thermal efficiency can reach more than 40%. Operating under design conditions, coupled with today's increasingly serious traffic congestion, has led to vehicles driving at low speeds in many cases, resulting in a sharp reduction in thermal efficiency, increased fuel consumption, and increased vehicle carbon dioxide and pollutant emissions. The fundamental reason for the decrease in thermal efficiency of the car at low speed is that the compression ratio (the ratio of the maximum volum...

AI Technical Summary

Problems solved by technology

This leads to the fact that the efficiency of traditional gasoline engines is relatively high under design conditions, but the compression ratio is relatively not high enough under low conditions, resulting in a decrease in efficiency and an increase in fuel consumption

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