Variable length connecting rod with hydraulic mechanism

Abstract

The invention discloses a variable length connecting rod with a hydraulic mechanism. The inside of the connecting rod body is a cavity, the cavity leads to a connecting rod small end and has a pistonpipeline, the piston pipeline is internally equipped with a piston rod, a piston body moves in the cavity, the connecting rod small end is internally equipped with a rolling shaft, the rolling shaft has an eccentric pin inside, one roller shaft position facing the piston pipeline is equipped with an arc-shaped sliding chute body, one piston rod end facing the rolling shaft is equipped with a cylindrical pin, the cylindrical pin is located in the sliding chute body, the rolling shaft rotates to drive the piston rod to move, the connecting rod is also internally equipped with a first oil duct and a second oil duct. Compared with the prior art, the variable length connecting rod with a hydraulic mechanism provided by the invention has the characteristics of simple structure and high feasibility, realizes two-stage variable high-low compression ratio, not only can improve the partial load thermal efficiency of a gasoline engine, but also can avoid detonation under a heavy load, and effectively improves the reliability and economical efficiency of the engine.

Description

technical field [0001] The invention relates to a connecting rod, in particular to a variable-length connecting rod with a hydraulic mechanism, and belongs to the technical field of engine moving parts. Background technique [0002] Generally, existing internal combustion engines have four strokes of suction, compression, work, and exhaust. The air passes through the piston to complete the suction and compression strokes, and its volume is compressed several times to dozens of times and mixed with fuel. After the explosion, its volume will expand dozens of times on the original basis, so that the expanded gas pushes the piston to do work. Because the piston of general existing internal-combustion engine is all equal strokes in suction, work, exhaust, compression working stroke, the air pressure that its expansion gas produces can only have a part to be used for doing work, and the rest is exhausted by muffler, exhaust. The trachea, etc. are consumed, and then discharged; th...

AI Technical Summary

Problems solved by technology

Because the piston of general existing internal-combustion engine is all equal strokes in suction, work, exhaust, compression working stroke, the air pressure that its expansion gas produces can only have a part to be used for doing work, and the rest is exhausted by muffler, exhaust. The trachea is consumed and then discharged; the compression ratio of the existing gasoline engine is fixed at present, increasing the compression ratio can improve part-load thermal efficiency and reduce fuel consumption; but increasing the compression ratio has the risk of knocking in high-load areas

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