Title: Evaluation of efficiency of a driving system on the basis of energetic and ecological characteristics of an IC engine and hydrostatic transmission for the spectrum of load

Authors: Henryk Chrostowski, Waldemar Sradomski

Addresses: Wroclaw University of Technology, Institute of Machine Design and Operation, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland. ' Wroclaw University of Technology, Institute of Machine Design and Operation, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland

Abstract: The following paper presents the general model of a driving system: IC engine - hydrostatic transmission - load of a vehicle, in the form of area with specified spectrum of variables: torque and velocity. This model allows the analysis of efficiency of hydrostatic driving system and points of work of an IC engine in the field of load characteristics. Mathematical models of the components of the driving system, for the analysed case, are the results of the experimental examination. The concepts of global efficiency and ecological indexes originally introduced are suitable to compare the quality of driving systems working in statistically the same load conditions. It allows the evaluation of the value of those parameters in the whole functioning life of a machine.

Keywords: ecological index; global efficiency index; hydrostatic transmission; IC engine control; internal combustion engines; torque; velocity; vehicle load; drive system; modelling; power transmission.

DOI: 10.1504/IJVD.2005.007288

International Journal of Vehicle Design, 2005 Vol.38 No.2/3, pp.139 - 149

Published online: 02 Jul 2005 *

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