The Properties and Parameters Needed of the Magnetorheological Fluid for Use in the Intelligent Damper of the Vehicle Suspension System

Document Type : Review Article

Authors

School of Chemical Engineering, Iran University of Science and Technology, Tehran, I.R. IRAN

Abstract

Industries are severely needed to the promising capabilities of magnetorheological fluids. In most systems that need to regulate the motion by the viscosity change, there is always a solution based on Magnetorheology, resulting in improved performance and cost. The unique properties such as fast response, simple relationship between electrical power and output mechanical power, controllability, and easy and smart performance, have made these fluids a desirable technology for use in vehicle suspension systems. A suitable magnetorheological fluid for use in a vehicle suspension system should have features such as low viscosity in the absence of a magnetic field, promising rheological properties, and fast response in the range of a few milliseconds, good stability against temperature changes and settling and non-abrasive. Also, one of the most important characteristics of a suitable magnetorheological fluid for use in the smart damper is it’s durability against in-use thickening (IUT). It means that in some of the industrial magnetorheological fluids in successive cycles of operation, some parts of the magnetizable particles and also the formed oxide layer on the surface of particles settle and form a hard cake that greatly reduces the effectiveness of the fluid. With a proper selection of materials and synthesis methods, the durability of the fluid in successive cycles can greatly improve. Materials and production methods of magnetorheological fluid should be selected in such a way that the above-mentioned properties are present in the sample for industrial applications.

Keywords

Main Subjects


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