| 摘要 |
PURPOSE:To efficiently remove secondary vibration, by providing each counterweight, respectively having specific moment, in the first and fourth cylinder group, second and third cylinder group and a reciprocating balancer provided in the central part between the second and third cylinders. CONSTITUTION:A reciprocating balancer 10 is provided in the central part between the second and third cylinders. And the balancer 10 provides counterweights 16 having moment in which 1/2 the moment by reciprocating mass is added to the moment by the self rotary mass. While the balancer 10 sets its phase such that the balancer 10 is placed in the bottom dead center when a piston of the first cylinder 1 is placed in the top dead center. While each counterweight 5, 8, provided in the first and fourth cylinders 1, 4, is given moment by rotary mass, further each counterweight 6, 7 of the second and third cylinders 2, 3 is given a sum of the moment by the rotary mass and the moment 1/2 the moment by thc reciprocating mass, respectively. |
