Simulation of a diesel engine operating with ethanol to reduce pollutant emissions

José Ricardo Sodré*, Rodrigo Teixeira De Souza Brito, Alex De Oliveira, André Marcelino De Morais

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


In this study a computational model to simulate the operation of a diesel engine fuelled by blends of 95% diesel oil + 5 % biodiesel (B5) and anhydrous ethanol was developed. The model was developed using the Engineering Equation Solver (EES) software and calculates fuel and air properties and the thermodynamic processes of the engine cycle. Ethanol injection was investigated by two different techniques: direct injection in the combustion chamber, together with B5, and indirect injection in the intake air system, with B5 being directly injected in the combustion chamber. Fuel/air mixture equivalence ratio, compression ratio, and the injected amount of ethanol were varied to obtain the cycle temperature and pressure diagrams, fuel consumption, indicated power, and exhaust gas composition. Fuel/air mixture equivalence ratio was varied from 0.7 to 0.9, compression ratio was varied from 15:1 to 19:1, directly injected ethanol concentration was varied up to 20 % of the total fuel amount injected, and intake system injected ethanol concentration was varied up to 50 % of the total fuel amount injected. The results demonstrate that the use of ethanol can reduce carbon monoxide (CO) and oxides of nitrogen (NOX) emissions, slightly penalizing the net cycle work and increasing fuel consumption. Direct ethanol injection in the combustion chamber was shown to be more advantageous technique than indirect ethanol injection in the intake system.

Original languageEnglish
Pages (from-to)1165-1170
Number of pages6
JournalChemical Engineering Transactions
Issue numberSpecial Issue
Publication statusPublished - 20 Aug 2014
Event17th Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction, PRES 2014 - Prague, Czech Republic
Duration: 23 Aug 201427 Aug 2014

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