Optimizing the level of exhaust gas recirculation in a diesel engine to reduce the content of nitrogen oxides with minimal loss of power

The utilization of exhaust gas recirculation (EGR) is a fundamental approach to the reduction in the nitrogen oxide emissions from engines that operate on lean fuel mixtures, particularly diesel engines. However, the return of a fraction of the exhaust gases back into the engine’s intake manifold, i...

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Bibliographic Details
Main Authors: Uzuntonev, Trifon, Belchev, Sergey, Manev, Valentin, Uzuntonev, Pavel, Dimitrov, Preslav, Mehmedov, Ismail
Format: Conference Proceeding
Language:English
Subjects:
Diesel engines
Exhaust gases
Fuel mixtures
Intake manifolds
Nitrogen oxides
Optimality criteria
Optimization
Performance degradation
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Summary:The utilization of exhaust gas recirculation (EGR) is a fundamental approach to the reduction in the nitrogen oxide emissions from engines that operate on lean fuel mixtures, particularly diesel engines. However, the return of a fraction of the exhaust gases back into the engine’s intake manifold, is likely to produce an adverse effect on the engine performance by degrading its power and economic indicators. To address this issue, therefore, the paper develops a more practical approach to optimize the diesel engine exhaust gas recirculation flow rate in order to reduce the nitrogen oxide content with minimum loss of power. A specific optimality criterion was established, and a three-input-factor experiment was successfully conducted. The optimization problem was solved allowing for the achievement of a minimum NOх content under all operating conditions in the selected mode of the engine.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0199492