An automotive suspension strut using compressible magnetorheological fluids

Sung-Ryong Hong; Gang Wang; Wei Hu; Norman M. Wereley; Jack Niemczuk

doi:10.1117/12.600878

16 May 2005 An automotive suspension strut using compressible magnetorheological fluids

Sung-Ryong Hong, Gang Wang, Wei Hu, Norman M. Wereley, Jack Niemczuk

Proceedings Volume 5760, Smart Structures and Materials 2005: Damping and Isolation; (2005) https://doi.org/10.1117/12.600878
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2005, San Diego, California, United States

Abstract

An automotive suspension strut is proposed that utilizes compressible magnetorheological (CMR) fluid. A CMR strut consists of a double ended rod in a hydraulic cylinder and a bypass comprising tubing and an MR valve. The diameter on each side of the piston rods are set to be different in order to develop spring force by compromising the MR fluid hydrostatically. The MR bypass valve is adopted to develop controllable damping force. A hydro-mechanical model of the CMR strut is derived, and the spring force due to fluid compressibility and the pressure drop in the MR bypass valve are analytically investigated on the basis of the model. Finally, a CMR strut, filled with silicone oil based MR fluid, is fabricated and tested. The spring force and variable damping force of the CMR strut are clearly observed in the measured data, and compares favorably with the analytical model.

Citation Download Citation

Sung-Ryong Hong, Gang Wang, Wei Hu, Norman M. Wereley, and Jack Niemczuk "An automotive suspension strut using compressible magnetorheological fluids", Proc. SPIE 5760, Smart Structures and Materials 2005: Damping and Isolation, (16 May 2005); https://doi.org/10.1117/12.600878

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