Resumo

PEREZ-GALVEZ, R.; FUENTES-VEGA, J. R.; COGOLLOS-MARTINEZ, J. B.  e  TOLEDO-BORREGO, A.. Evaluation of the heavy duty trucks energy efficiency in the modified drive cycle. Ingeniería Mecánica [online]. 2010, vol.13, n.1, pp. 49-58. ISSN 1815-5944.

In this paper, the new formulation of a theoretical drive cycle is presented. It is integrated by stages of a real drive cycle with the prefix settings of movement and operation. In the cycle modification the following approaches are taken account: minimal rotation frequency in stable movement; the transmission efficiency is variable with the speed, the weight, and the gear ratio; a new rotation frequency for gear shifting; a motor braking stage and; a group of new equations for the fuel consumption. New mathematical models were obtained for the fuel consumption indicators of the heavy duty trucks with manual transmission. Furthermore, the indicator Automobile Work Effectiveness Coefficient is presented. It describes the energy efficiency in the acceleration stage involving the fuel energy during the impulsion of payload until it reaches a certain speed.

Palavras-chave : drive cycle; fuel consumption; mathematical models; vehicle evaluation.

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