Development of a Low-vibration New Structure Engine by Using the XY-separate Crank Mechanism

Abstract

The XY separation crank mechanism is a new linear motion mechanism devised by the authors. It eliminates the conrodʼs swinging and makes the piston displacement sinusoidal, so that no higher-order vibrations occur. The authors succeeded in eliminating 1st order vibration by incorporating this mechanism into the engine as arranging the mechanism and cylinder in a mirror image, and minimizing 2nd order and 3rd order vibrations by the effect of the mechanism itself. In this report, we report the ultra-low vibration characteristics of this new engine, the two-cylinder engine with XY separation crank mechanism arranged in mirror-image, and suggest its applicability to drones.