| 摘要 |
PURPOSE:To enable setting of resonant rotation in low rotation area by increasing the inertia mass of web at the furthest position from the flywheel thereby decreasing the resonant rotation. CONSTITUTION:The crankshaft 10 has three pins 11 corresponding with respective cylinder where webs 12A-12C are provided to respective pin 11 while a flywheel 13 is provided at one end. Consequently, only the inertia mass of web 12C arranged at the furthermost position from the flywheel 13 will increase. As a result, resonant rotation can be reduced by approximately same degree with the case where all webs 12A-12C are enlarged thus to enable setting in low rotation area. |
