Abstract
KEYWORDS:
transport, diesel engine, fuelling, biofuels, emission
ABSTRACT:
Applying of alternative fuels in internal combustion engines is one of the most important factors in the future of their developments. The paper concerns the formation of different chemical components of exhaust gas in the cylinder and exhaust system of direct injection diesel engine fuelled by rape oils and rape methyl esters at different injection parameters and engine loads. The experimental results of exhaust emission were obtained on the test stand with SB-3.1 direct injection 1-cylinder diesel engine and compared with the computation results of complex simulation thermodynamic engine processes. The simulation was conducted in modified by author KIVA3V program with the additional library of thermodynamic properties of considered biofuels and kinetics reactions and also equilibrium reactions. The paper includes properties of applied fuels which influence on the injection and combustion process of fuel. The complicated engine geometry was considered in simulation process. Advanced injection time with 4-hole injector increases amount of NOx, however enables bigger cylinder pressure and also indicated pressure. The paper shows formation of CO, HC, NO and CO2 in the cylinder and exhaust emission for diesel engine SW680. The work was done in order to verification of thermodynamic properties of biofuels in simulation program and to compare exhaust emission level of biofuels with diesel oil. The future way of development of diesel engine in European Community and USA which will have to fulfil the environment requirements is also presented.