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Pneumatic Vehicular Suspension With a Controllable Stiffness Spring

[+] Author Affiliations
Carlo Ferraresi, Walter Franco, Giuseppe Quaglia

Politecnico di Torino, Torino, Italy

Andrea Morello, Domenico Pierucci

Texa Automotive Testing, Avigliana, TO, Italy

Paper No. ESDA2006-95400, pp. 183-192; 10 pages
doi:10.1115/ESDA2006-95400
From:
  • ASME 8th Biennial Conference on Engineering Systems Design and Analysis
  • Volume 2: Automotive Systems, Bioengineering and Biomedical Technology, Fluids Engineering, Maintenance Engineering and Non-Destructive Evaluation, and Nanotechnology
  • Torino, Italy, July 4–7, 2006
  • ISBN: 0-7918-4249-5 | eISBN: 0-7918-3779-3
  • Copyright © 2006 by ASME

abstract

This paper deals with the design of a new vehicular pneumatic suspension. It presents an innovative scheme of suspension, using a special 3-membrane deformable fluid spring. The spring is provided with three internal chambers, supplied by a compressible fluid. Each chamber presents a different volume gradient versus the stroke; a proper variation of the connection between the chambers, that may be performed in few milliseconds, determines a stiffness variation of the air spring. The spring structure and the related mathematical models are presented. Afterwards the process of adaptation of the component to a specific mid-low class car model, in order to achieve a prototypal phase, is described. Finally the results of some dynamic simulations of the car behavior are shown.

Copyright © 2006 by ASME
Topics: Springs , Stiffness

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