Piston with variable lift compression ratio

Abstract

The invention discloses a piston with a variable lift compression ratio, aiming to solve the problems of complex mechanical structure, various parts and poor sealing performance of the prior art. The piston comprises an upper piston body part, an inner sleeve, a motor stator, a motor rotor, a motor base, a snap ring, a pressure spring and a lower piston body part, wherein the motor base is fixedly connected into an inner hole in the top end of the lower piston body part, and the motor stator is fixedly connected into a circular ring body at the center of the motor base; the bottom end surface of the motor stator is connected with the motor base in the circular ring body in a contacting manner, and the motor rotor is mounted in the center hole of the motor stator; the inner sleeve is mounted around the motor rotor and the motor stator in a sleeving manner, and a splined hole in the inner sleeve is matched with a spline shaft at the top end of the motor rotor; the pressure spring and the snap ring are mounted in the annular groove in the top end of the lower piston body part from bottom to top, and the upper piston body part is mounted at the top end of the lower piston body part; the upper piston body part is in threaded connection with the inner sleeve and connected with the lower piston body part in a sliding manner.

Description

technical field [0001] The invention relates to an automobile engine piston, more precisely, the invention relates to a variable lift compression ratio piston. Background technique [0002] The compression ratio of the engine refers to the ratio of the cylinder volume when the piston moves to the bottom dead center and the cylinder volume when the piston moves to the top dead center. Increasing the compression ratio can effectively improve the performance and efficiency of the engine. Because the increase in pressure can increase the density of the gas, the distance between molecules will also become smaller, so that the distance between fuel molecules and oxygen molecules will be closer, and the burning speed will be faster; the temperature can make the gas molecules move faster, and the fuel molecules It interacts more easily with oxygen molecules, which makes the mixture easier to ignite. Moreover, the smaller combustion space can complete the combustion faster, and the ...

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is to overcome the problems of complex mechanical structure, numerous parts and poor sealing performance in the prior art, and to provide a variable lift compression ratio piston

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