| 摘要 |
PURPOSE:To reduce a remaining unbalanced inertial force including a high-order remaining unbalanced inertial force to the minimum value by adjusting the over- balance factor of a crank shaft and the crank pin relative angle. CONSTITUTION:In a V-type internal-combustion engine having a capiper angle of less than 60 deg. between one cylinder train and the other cylinder train, a remaining unbalanced inertial force can be reduced to the minimum value by adjusting DELTAdelta and DELTAbeta to limit the over-balance factor and the crank pin relative angle beta expressed in equations beta=2alpha+180 deg.+DELTAbeta, delta=0.5+DELTAdelta, (DELTAbeta>0, DELTAdelta>0), where DELTAdelta is the deviation of the over-balance factor of a crank shaft when only the primary unbalanced inertial force is 0, DELTAbeta is the deviation of the crank pin relative angle, and alpha is a caliper angle. |
