Variable-compression-ratio piston with driving mechanism

Abstract

The invention discloses a variable-compression-ratio piston with a driving mechanism. The problems that in the prior art, the compactness and the reliability are poor are overcome. The variable-compression-ratio piston is composed of a piston head upper body, a piston head lower body, a first transmission shaft, a second transmission shaft, a motor shaft and a motor, wherein the piston head upperbody and the piston head lower body are in separated type and are connected with each other through trapezoidal threads; the first transmission shaft is connected with the second transmission shaft through a straight-teeth bevel gear; the first transmission shaft is connected with the motor shaft through a planetary gear mechanism; a piston pin of the motor serves as a shell; the inner side of thepiston head upper body is connected with the outer side of the piston head lower body in a tightened mode through lifting threads; the piston head lower body, the piston pin and a piston pin hole arean integrated part from top to bottom; turning and synchronous rotating of the two transmission shafts are achieved through the straight-teeth bevel gear; torque which are output by the motor shaft is transmitted to the first transmission shaft through the planetary gear mechanism in a slow-down mode; the motor adopts the piston pin as the shell; and a rotor on the right side of the motor and theshaft are supported into a supporting hole in a piston pin clamping ring of the right end of the piston pin.

Description

technical field [0001] The present invention relates to a variable compression ratio piston of an internal combustion engine, more precisely, a variable compression ratio piston with a planetary gear drive mechanism. Background technique [0002] At this stage, the development of traditional engines increasingly hopes to achieve many variable degrees. The greater the variable degree, the better the performance adaptability, and the maximum torque and power can be displayed. The variable compression ratio technology is a very important research content among many variable technologies. The compression ratio indicates the degree to which the mixed combustion gas entering the cylinder can be compressed. In theory, if the compressed volume of the combustible gas entering the cylinder is smaller, The correspondingly generated cylinder pressure will be greater, and the power output that can be provided will also increase accordingly. But also, different working conditions, temper...

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a variable compression ratio piston with a drive mechanism to solve the technical problems of complex structure, poor compactness, low adaptability and high cost in the prior art.

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