| 摘要 |
A balancer mass is reciprocated linearly in the plane of the piston/cylinders of a four cylinder in-line engine by a pair of cams mounted on the crankshaft for rotation therewith. The second order vibrations can be substantially eliminated either by mounting a single balancer of the invention at the center of the crankshaft or by using a pair of balancers mounted one each at opposite ends of the crankshaft. The vibrations can also be substantially reduced by mounting a single balancer at the "free end" of the crankshaft opposite the clutch and flywheel.
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