Int. J. of Heavy Vehicle Systems   »   2011 Vol.18, No.2

 

 

Title: An investigation of air damping for heavy goods vehicles

 

Author: R.L. Roebuck, A.R. Jones, D. Cebon

 

Addresses:
Cambridge University Engineering Department, Trumpington Street, Cambridge, CB2 1PZ, UK.
Cambridge University Engineering Department, Trumpington Street, Cambridge, CB2 1PZ, UK.
Cambridge University Engineering Department, Trumpington Street, Cambridge, CB2 1PZ, UK

 

Abstract: The addition of a secondary volume, with inlet flow restriction, to a heavy vehicle air spring was investigated. The aim of the work was to determine whether such a modification could produce a suspension unit capable of replacing the conventional parallel combination of air spring and hydraulic damper. A mathematical model of the spring, additional volume and an adjustable flow restriction was developed and a test rig constructed. Results showed that a flow restriction could be found in each case to give optimum damping. The damping ratio of the system was also studied, and was found to provide 73% of the minimum required for the EU road-friendliness test.

 

Keywords: air springs; vehicle suspension; heavy goods vehicles; heavy vehicles; dynamics; air damping; secondary volume; inlet flow restrictions; mathematical modelling.

 

DOI: 10.1504/IJHVS.2011.040498

 

Int. J. of Heavy Vehicle Systems, 2011 Vol.18, No.2, pp.115 - 134

 

Available online: 31 May 2011

 

 

Editors Full text accessAccess for SubscribersPurchase this articleComment on this article