1942-01-01

Engine Smoothness and SHEAR RUBBER Protection through MOUNTINGS 420108

THE purpose of this paper is to acquaint the engineer with the factors involved in the adaptation of resilient mountings to automotive powerplants. The benefits to be gained by the proper use of shear-loaded bonded rubber mountings are shown to be vibration and noise isolation, shock protection, and provision to accommodate structural twist without straining engine parts. Serving to disprove a number of erroneous impressions, this treatment points out, for instance, that it is not necessary to tolerate instability of the powerplant in order to realize a high degree of vibration absorption.
Representing considerable on-the-job experience in this type of work, particularly with commercial-type engines, the material in this paper forms a basis on which an engineer should be able to analyze and layout his own installation. The author emphasizes the necessity for detailed consideration of such factors as disturbing frequencies of vibration, engine configuration, structural characteristics, and conditions of operation.

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