| 摘要 |
PURPOSE:To cancell rolling moment by disposing a pair of balance shafts outside an engine body, and controlling the balance shafts through a rotary driving device according to a crank angular velocity and a crank angle. CONSTITUTION:A pair of balance shafts 13, 14 on both right and left sides outside an engine body 11. A control device 21 is adapted to control the rotating speed of motors 17, 18 according to electric signals input from detecting portions 22, 23 for detecting an angular velocity and a crank angle of a crank shaft 12. Accordingly, rolling moment of an engine can be cancelled effectively. |
