A variable length engine connecting rod

Abstract

The invention provides a variable-length engine connecting rod. The variable-length engine connecting rod comprises a connecting rod large end and a connecting rod small end; the connecting rod largeend comprises a connecting rod tilting fillet, a tilting fillet guide rail and an oil cavity; the connecting rod large end and the connecting rod small end are connected, the connecting rod tilting fillet is arranged in an oil cavity of the connecting rod large end, the connecting rod tilting fillet divides the oil cavity into a first oil cavity and a second oil cavity, and the connecting rod tilting fillet slides on the tilting fillet guide rail in the connecting rod large end. According to the variable-length engine connecting rod, the changing between the center distances of the connectingrod large end and the connecting rod small end can be achieved, the connecting rod tilting fillet in the connecting rod large end achieves sliding displacing through oil pressure, the structure is simple and reliable, membrane springs are integrated in a cover plate, and the effects of increasing foundation damping, wear resistance and seal lubricating oil are achieved.

Description

technical field [0001] The invention relates to the field of automobile engines, in particular to a variable-length engine connecting rod. Background technique [0002] In the field of engines, the compression ratio is an important factor affecting the performance of the engine. For example, for a gasoline engine, if the compression ratio is too high, the gas mixture pressure in the cylinder of the gasoline engine will be too high under high load, resulting in knocking, which will cause serious damage to the engine. ;For diesel engines, too high a compression ratio will cause the engine to vibrate violently and affect the service life of the engine; for an engine with a turbocharger, in order to prevent knocking, its compression ratio is lower than that of a naturally aspirated engine. At low boost pressures, the compression ratio is low and the engine burns incompletely, resulting in poor thermal efficiency and fuel economy. These characteristics determine that the compres...

AI Technical Summary

Problems solved by technology

[0002] In the field of engines, the compression ratio is an important factor affecting the performance of the engine. For example, for a gasoline engine, if the compression ratio is too high, the gas mixture pressure in the cylinder of the gasoline engine will be too high under high load, resulting in knocking, which will cause serious damage to the engine. ;For diesel engines, too high a compression ratio will cause the engine to vibrate violently and affect the service life of the engine; for an engine with a turbocharger, in order to prevent knocking, its compression ratio is lower than that of a naturally aspirated engine. When the boost pressure is low, the compression ratio is low, and the combustion of the engine is not sufficient, resulting in a decrease in thermal efficiency and fuel economy

These characteristics determine that the compression ratio of a general engine is a compromise value considering various influencing factors, so the potential of the engine cannot be fully utilized. In order to solve these problems, it is very necessary to adopt variable compression ratio technology

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