Influence of physical & chemical properties of natural and plant fuels on fuel spray process in compression ignition engine

Abstract

Tests results of the fuel injection process and measurement in engine PERKINS 1104C-44 working per external velocity characteristic and feeding natural fuel and plant fuel were presented in this article. Analysis of the obtained results allowed to find differences in the course of the injection process and its combustion in engine fuelled with the above-mentioned fuels. Using fuels of different physical & chemical properties to compression-ignition engines requires high accuracy of selected parameters measurements in order to learn differences in processes of injection and combustion. Necessity of fulfilling more and more strict standards concerning emission of toxic components of exhaust gases forces users of diesel engines to possess quick and precision methods of their technical state assessment and particularly of a combustion process and of injection equipment technical state. Analysis of the fuel pressure in the injection pipe and injection nozzle lift allows for determining fuel outflow rate from the atomizer and fuel spray disintegration into droplets. Experimentally obtained indicator diagrams of cylinder pressure were also applied. The aim of the work is to evaluate, on the basis of a simple mathematical model, the parameters of a stream of atomized fuel, including plant fuels. In the calculations, the experimentally measured opening pressure of the sprayers and the lift of the sprayer needle were used.