1989-02-01

Noise and Vibration Reduction Technology for Rotary Engine 890325

This paper describes the rotary engine noise and vibration characteristics and some relevant new technologies. Available techniques for vibration minimization which are covered include: (a) identification of vibrational modes of an idealized rotary engine shaft model with the application of Holzer's successive method; (b) analysis of rotor vibration characteristics attendant with its unique movement and its design optimization; and (c) development of AIPI (Air Injection Port Insert) for the reduction of residual gas-caused combustion fluctuations at low load. In addition, how MCPI (Multi-Chamber Port Insert), from which AIPI was developed, reduces exhaust noise is detailed.

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