| 摘要 |
An engine balancing apparatus has a housing assembly mounted to a vehicle engine. The housing assembly has spaced apart endwalls and two parallel extending support shafts connected to the endwalls. A first counterweight is rotatably mounted concentrically about a first of the support shafts. The first counterweight has a first gear, a lead filled first void and a phenolic filled second void diametrically opposed from said first void. A second counterweight is rotatably mounted concentrically about a second of said support shafts. The second counterweight has a second gear, a lead filled third void and a phenolic filled fourth void diametrically opposed from the third void. The second gear in is driven engagement with the first gear for counter rotation therewith. The first support shaft is positioned relative to the crankshaft of the engine for drivingly engaging the first gear. Each of the counterweights has a center of gravity offset from an axis of rotation whereby as the counterweights counter rotate an inertial force is generated which has a canceling effect on inertial forces generated by operation of the vehicle engine.
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