471 圧縮コイルばね有無を用いた自動車の懸架装置用コロイダルダンパーに関する実験的研究

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Usual car suspensions employ oil dampers mounted in parallel with compression helical springs, the latter providing the necessary restoring force to bring back the suspension to its initial position after a complete cycle of compression-extension. The energy of shock and vibration is mainly stored by the spring during compression and then transferred to and dissipated by the oil damper during extension. On the other hand, in the case of a colloidal damper, since the liquid is forced to penetrate the nanopores of lyophobic silica during compression but naturally exudes on the liquid-repellent surfaces at decompression, the restoring force is intrinsically achieved, and the helical spring can be omitted. In other words, the colloidal damper occurs as a machine element with a dual function, of absorber and spring, this allowing a compact and light design of the car suspension. Additionally, since dissipation is produced during the compression phase of the working cycle, the efficiency of suspension can be improved. In this work four types of suspensions were considered: used (100,000 km travel distance) and unused (0 km travel distance) oil dampers mounted in parallel with helical compression springs, and unused colloidal dampers with and without attached springs. Firstly, all these suspensions were dynamically tested on a classical fatigue machine and the damping coefficients were determined. Then, they were mounted on the real suspension and travel tests of the automobile on half-sinusoidal steps were performed. Ride-comfort factor and transmissibility factor of vibrations from the rough pavement to the car's drive-shaft were experimentally evaluated.
一般社団法人日本機械学会の論文
2009-08-03

471 圧縮コイルばね有無を用いた自動車の懸架装置用コロイダルダンパーに関する実験的研究

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