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Comparative analysis of selected combustion parameters in the diesel engine powered with biodiesel - ethanol blends

Górski K., Smigins R., Longwic R.

Logistyka

2014

nr 3

2096--2103

The present work is focused on a comparative experimental study for determining the effect of fuel properties of oxygenated fuels on selected work parameters of direct injection (DI) diesel engine. The engine was operated on fossil diesel oil (DO), biodiesel (BD also known as FAME) and biodiesel with 10% and 20% ethanol addition, accordingly (ET10) and (ET20). Each of the fuels were tested at steady state running conditions. In such conditions the high-speed parameters of the engine work were recorded. In particular the variation of in-cylinder pressure as well as the fuel injector needle lift signals were analyzed. It allowed to calculate and compare the values of selected combustion parameters of the AD3.152 engine fuelled with biodiesel-ethanol blends. The experimental work was done with an AD3.152 diesel engine installed in the laboratory of the Vehicle Technical Exploitation Department at Technical University of Radom (Poland).

Niniejsza praca jest skupiona na eksperymentalnych badaniach umożliwiających określenie wpływu właściwości paliw zawierających tlen na wybrane parametry pracy silnika diesla z bezpośrednim system wtrysku. Silnik zasilano standardowym olejem napędowym, biodieslem (FAME – fatty acid methyl esters) oraz jego mieszaniną z dodatkiem 10 i 20 % (objętościowo) etanolu. Takie mieszaniny oznaczono odpowiednio ET10 i ET20. Każde z tych paliw było badanych w ustalonych warunkach pracy silnika. W takich warunkach rejestrowano przebiegi szybkozmienne procesów roboczych silnika. W szczególności analizowano przebiegi zmian ciśnienia w cylindrze oraz wzniosu iglicy rozpylacza paliwa. Pozwoliło to obliczyć i porównać wartości wybranych parametrów procesu spalania w silniku AD3.152 zasilanym mieszaninami FAME i etanolu. Prace eksperymentalne były wykonywane na silniku AD3.152 zainstalowanym w laboratorium Instytutu Eksploatacji Pojazdów i Maszyn UTH Radom.

The effect of diesel/ethanol blends on variations of selected combustion parameter

Lotko W., Smigins R., Górski K.

Journal of KONES

2009

Vol. 16, No. 2

279-284

This paper presents and discusses selected research results of the diesel engine fuelled with blends of: diesel oil (DO), synthetic ethanol (ET) as oxygenated additive and small quantity of fatty acid methyl esters (FAME) used as emulsifier. Content of ethanol in diesel oil was changed in wide range (up to 50%). Addition of 5% by vol. Of FAME was constant for each tested mixture. Preliminary tests were focused on influence of fuels blends composition on its combustion process. The main analyzed parameter was mean indicated pressure and its unrepeatability index. Research suggests that diesel oil blended with up to 20% of ethanol can be successfully used for diesel engines feeding. Higher ethanol content in mixture with diesel oil is unfavourable because misfire phenomenon occurs immediately. In this case tested engine works unstable with extremely high toxic gases emission. Some physical properties of tested fuels, measurement system configuration, Values of mean indicated pressure vs. cycle number for AD3.152 engine fuelled with: pure diesel oil, ETIO, ET20, ET30, ET 40, ET50, Variations of unrepeatability index of mean indicated pressure in relationship to kind of tested fuels are presented In the paper. Research shows that tested engine is not possible to operate with using above 40% of ethanol content in diesel oil, as the fuel simply will not ignite.