Agricultural Engineering, Volume 45, Number 1

The Impact Of Bioethanol Fuel On Agricultural Tractor Engine’s Exhaust Gas

Risto Ilves, Antanas Sakalauskas, Jüri Olt
Estonian University of Life Sciences; Aleksandras Stulginskis University; Estonian University of Life Sciences


The objective of the study was to develop an ethanol mixture with the lowest possible
concentration and to use that mixture as additional fuel. The purpose was to motivate
the farmers to produce local alternative fuels without using any rectification or blending
processes. The study also dealt with potential methods for adjusting, at minimal cost, a
common agricultural small tractor in order to use ethanol fuels. The article describes and
analyzes the experimentally obtained characteristics of a diesel engine exhaust gases,
when it is used simultaneously with two fuels, diesel and bioethanol from different concentrations.
The purpose of this study was to find minimum concentration of bioethanol mixture,
which allows satisfactory engine operation in the overload area of test plan. Ethanol fuels
EF 90; EF 80; EF 70 and EF 60 were used for performing by engine testing. The analysis of
combustion process in the engine indicates that introduction of different fuels in combustion
process by qualitative and quantitative method is acceptable in technical terms.
As far as the selection of ethanol fuel is concerned, 60% fuel does not cause significant
deterioration of engine operation or increase the amount of other hazardous compounds
in exhaust gases. It is recommended to use a 60% ethanol fuel as minimum concentration
in addition to regular diesel fuel so that the ethanol fuel would comprise up to 60%
of the entire fuel amount used by medium load of engine.


Article is in english language

Keyword(s): Fuel mixture, dual-fuel method, exhaust gas characteristics.

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Agricultural Engineering ISSN 1392-1134 / eISSN 2345-0371

This journal is published under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License. Responsible editor: Dr A. Žunda.