Oil saving piston of internal-combustion engine

Abstract

An oil-saving piston of internal combustion engine consists of piston skirt section, piston skirt wall and piston ring. It is featured as forming multiple groove and multiple trough hole as well as multiple nonthrough hole at said skirt section of piston then using said groove to provide stored lubrication oil and said through hole to provide supplied lubrication oil as well as said nonthrough hole to provide stored lubrication oil.

Description

Technical field: [0001] The invention relates to a piston of an internal combustion engine. In particular, it relates to a method and a step for reducing the friction between a piston and a cylinder wall of an internal combustion engine and a fuel-saving piston of an internal combustion engine for realizing the method and the step. Background technique: [0002] The piston is the "heart" of the internal combustion engine, which bears alternating mechanical loads and thermal loads, and is one of the key components with the worst working conditions in the internal combustion engine. The function of the piston is to withstand the gas pressure and transmit it to the connecting rod through the piston pin to drive the crankshaft to rotate. The piston works under the conditions of high temperature, high pressure and high speed. Therefore, it is severely heated, and due to the inherent characteristics of the structure, the heat dissipation conditions are poor. When the piston works...

AI Technical Summary

Problems solved by technology

The disadvantage is that part of the peripheral surface of the above-mentioned piston is close to the inner surface of the cylinder. As the closest position is moved along the circumferential direction, the gap between the piston and the cylinder becomes larger, and the oil held in the groove of the piston skirt is pushed to both sides of the groove. , reducing the amount of lubricating oil held in the groove

The disadvantage is that the area of ​​the piston skirt is small, which cannot guarantee the stability of the piston movement and increases the vibration and noise of the engine.

Its disadvantage is that the lubricating oil cannot reach the piston skirt quickly, but splashes to the cylinder wall through the high-speed operation of the engine.

When the piston descends, the sharp edge of the lower edge of the piston skirt will remove most of the lubricating oil existing on the cylinder wall, resulting in a decrease in the oil film area between the piston skirt and the cylinder wall, resulting in poor lubrication

So, there is room for improvement

Images