Application of an EGR system in a direct injection diesel engine to reduce NOx emissions

7th European Thermal-Sciences Conference

De Serio, D.^1 ; De Oliveira, A.^2 ; Sodré, J.R.^2

Energy Department, Polytechnic University of Turin, Corso Duca degli Abruzzi 24, Torino

10129, Italy^1

Mechanical Department, Pontifical Catholic University of Minas Gerais, Av. Dom José Gaspar 500, Belo Horizonte

30535-901, Brazil^2

关键词: Combustion pro-cess;    Direct injection diesel engines;    Engine performance;    Exhaust gas recirculation systems;    NOx emissions;    Oxides of nitrogen;    Thermal efficiency;    Total hydrocarbons;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/745/3/032001/pdf
DOI  :  10.1088/1742-6596/745/3/032001

来源: IOP

【 摘 要 】

This work presents the application of an exhaust gas recirculation (EGR) system in a direct injection diesel engine operating with diesel oil containing 7% biodiesel (B7). EGR rates of up to 10% were applied with the primary aim to reduce oxides of nitrogen (NOx) emissions. The experiments were conducted in a 44 kW diesel power generator to evaluate engine performance and emissions for different load settings. The use of EGR caused a peak pressure reduction during the combustion process and a decrease in thermal efficiency, mainly at high engine loads. A reduction of NOx emissions of up to 26% was achieved, though penalizing carbon monoxide (CO) and total hydrocarbons (THC) emissions.