Title: Influences of the load centre of gravity on heavy vehicle acceleration

Authors: A. Navarro, A. C. Canale

Addresses: DEMAC, IGCE, UNESP, R. 10, 2527, Cx.P. 178, 13500-230 Rio Claro, EESC, USP, Sao Carlos, SP, Brasil. DEMAC, IGCE, UNESP, R. 10, 2527, Cx.P. 178, 13500-230 Rio Claro, EESC, USP, Sao Carlos, SP, Brasil

Abstract: The aim of this paper is to analyse the influence of the load centre of gravity on heavy vehicle acceleration. This analysis is done through a method in which a vehicle centre of gravity map is used. A model for the driving force is presented for bus, truck and tractor-semitrailer combinations. The proposed model takes into consideration the resistance forces (drag, rolling resistance, translation and rotation acceleration, climbing resistance) and the 4 X 2 traction system. The positions of the vehicle centre of gravity as a function of the position of the load centre of gravity are determined. The vehicle acceleration is calculated based on the position of the load centre of gravity. This study analyses the acceleration of one of the Mercedes-Benz do Brasil tractor-semitrailer vehicle. A comparison of the acceleration for different maximum adhesion coefficients and ramps are presented, showing new results. An example showing the variations of the load centre of gravity position with the acceleration time and distance is provided. The load centre of gravity position is important for vehicle safety and the efficiency and economy in the transportation of the load.

Keywords: centre of gravity; heavy vehicle modelling; heavy vehicle simulation; vehicle acceleration.

DOI: 10.1504/IJHVS.2001.001155

International Journal of Heavy Vehicle Systems, 2001 Vol.8 No.1, pp.17-47

Published online: 13 Dec 2003 *

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