Tag Archives: non-road steady cycle

197-204 M. Pexa, J. Mařík, K. Kubín and K. Veselá
Impact of biofuels on characteristics of the engine tractor Zetor 8641 Forterra
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Impact of biofuels on characteristics of the engine tractor Zetor 8641 Forterra

M. Pexa¹*, J. Mařík¹, K. Kubín² and K. Veselá¹

¹CULS-Czech University of Life Sciences Prague, Faculty of Engineering, Kamycka 129, 16521, Prague 6, Czech Republic; *Correspondence: pexa@tf.czu.cz
²VUZT-Research institute of Agricultural Engineering p.r.i.; Czech Republic

Abstract:

The European Union currently pays great attention to the possibilities for the use of biofuels  to  power  mobile  machinery.  The  main  reasons  for  the  promotion  of  biofuels  is  the effort of Member States to reduce dependence on oil imports, efforts to reduce emissions from internal  combustion  engines  and  also  efforts  to  support  agriculture.  As  the  best  substitute  for diesel, promoting fatty acid methyl ester, namely in the Czech conditions rapeseed methyl ester (RME). Requirements for diesel fuel are the norm ČSN EN 590 and prescribes requirements for RME standard ČSN EN 14214. At present, based on the requirements of EU directives there is a  mandatory  addition  of  methyl  ester  in  diesel  of  a  maximum  volume  fraction  of  7%.  This blended fuel complies with ČSN EN 590 and can be used without any modification to existing diesel engines. Production of methyl ester of fatty acids is energy intensive and therefore offer, with the allowance made for the structural adjustment of the combustion engine, the possibility to use a mixture of diesel fuel and oil directly. In this paper they are compared on the basis of the  complete  characteristics  of  the  engine  performance  parameters  (torque  and  engine  power) and  minimum  specific  fuel  consumption.  Based  on  standardised  test  NRSC  (non-road  steady cycle)  are  also  compared  smoke  and  fuel  consumption  of  the  internal  combustion  engine  of  a Zetor 8641 Forterra tractor (tractor has worked less than 100 hours). As the fuel is a mixture of different ratios of selected diesel with rapeseed oil, jatropha curcas oil and rapeseed oil methyl ester.

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