Title: An experimental evaluation of magneto-rheological front fork suspensions for motorcycle applications

Authors: Mehdi Ahmadian, Corina Sandu

Addresses: Centre for Vehicle Systems and Safety (CVeSS), Virginia Tech (MC-0901), Blacksburg, 24061 VA, USA. ' Advanced Vehicle Dynamics Laboratory, Virginia Tech (MC-0901), Blacksburg, 24061 VA, USA

Abstract: The primary purpose of this study is to evaluate the performance of semiactive Magneto-Rheological (MR) suspensions when they are adapted for the front fork of a motorcycle. MR dampers and skyhook control systems offer an alternative to conventional motorcycle suspensions, in terms of providing a better compromise between handling and rider comfort. The MR dampers are designed for high controllability and low power consumption, two vital considerations for a motorcycle application. The damper test rig results show the MR dampers have a far greater range of adjustability than the Original Equipment (OE) dampers. Acceleration measurements from a variety of staged road conditions, such as sinusoidal wave inputs, are compared to subjective test-rider field reports, in order to establish a correlation between rider fatigue and the front suspension performance. The test results show that the MR front fork can greatly decrease the acceleration and shock loading transmitted to the rider through the handlebars, while improving anti-dive under braking condition.

Keywords: motorcycles; front fork suspensions; magneto-rheological damping; magnetorheological dampers; semiactive suspensions; semi-active suspensions; motorbikes; motorcycle suspensions; rider fatigue; front suspension performance; anti-drive; acceleration; shock loading.

DOI: 10.1504/IJVSMT.2008.025405

International Journal of Vehicle Systems Modelling and Testing, 2008 Vol.3 No.4, pp.296 - 311

Published online: 21 May 2009 *

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