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A Low Vibration Engine with Unique Counter-Balance Shafts
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English
Abstract
Subcompact cars generally use 4-cylinder engines, because of their advantages over 6-cylinder or 8-cylinder engines in production cost, engine size, weight, combustion efficiency, emission control, etc. The 4-cylinder engine, however, has an inherent shortcoming of second order vibration in the vertical and rolling directions, originating from the reciprocating masses and explosions in the engine.
A new in-line 4-cylinder engine with its vibration reduced to a level comparable to the 6-cylinder engine or rotary engine has been recently developed while retaining the advantages mentioned above. The engine incorporates a unique balancing system, which reduces the booming to a minimum in the vehicle passenger compartment.
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Citation
Nakamura, H., "A Low Vibration Engine with Unique Counter-Balance Shafts," SAE Technical Paper 760111, 1976, https://doi.org/10.4271/760111.Also In
References
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