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DESIGN INNOVATIONS

Suspension Synthesis for N:1 Roll Center Motion

[+] Author and Article Information
Madhusudan Raghavan

 Powertrain Systems Research Laboratory, GM R&D Center, MC 480-106-354, 30500 Mound Road, Warren, MI 48090-9055madhu.raghavan@gm.com

J. Mech. Des 127(4), 673-678 (Jul 29, 2004) (6 pages) doi:10.1115/1.1867500 History: Received January 27, 2004; Revised July 29, 2004

A dimensional synthesis procedure to achieve prescribed roll center height variation of a vehicle’s sprung mass with respect to wheel jounce-rebound is presented. This may be used to size the relative lengths of the control arms of a short-long arm suspension mechanism in order to (i) fix the roll center with respect to ground, or (ii) fix the roll center relative to the sprung mass, or (iii) have the roll center move at a prescribed rate relative to the sprung mass, during wheel jounce-rebound. These design selections have a significant impact on the ride-handling characteristics of a vehicle. Numerical examples are provided to demonstrate the synthesis procedure.

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Copyright © 2005 by American Society of Mechanical Engineers
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Figures

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Figure 3

SLA suspension geometric parameters

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Figure 4

Condition for 1-to-1 roll center motion

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Figure 6

Roll center height versus wheel center travel

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Figure 5

SLA with tie-rod

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Figure 2

Approximating a circular arc

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