| Title: |
SIMULATION OF BASIC FACTORS AFFECTING THE EXHAUST GAS RECIRCULATION SYSTEM AS A MEANS OF EMISSION CONTROL IN A SPARK IGNITION ENGINE. |
| Authors: |
AREMU, Olaniyi Olateju; ADEYEMI, Adeyinka; OKE, Sunday Ayoola; OLA, Ibukun Adekola |
| Source: |
Scientific Journal of Silesian University of Technology. Series Transport / Zeszyty Naukowe Politechniki Slaskiej. Seria Transport; 2026, Vol. 130, p5-40, 36p |
| Subject Terms: |
EXHAUST gas recirculation; EMISSION control; AUTOMOBILE engine performance; SPARK ignition engines; AERODYNAMICS; ABATEMENT (Atmospheric chemistry); COMBUSTION; THERMODYNAMICS |
| Abstract: |
In spark ignition engines, engine performance and emission control are determined through the varying influence of exhaust gas recirculation and its aero-dynamic properties. However, few intensive studies are available in this domain. This paper simulates the combustion process in a spark ignition engine, studying the effects of exhaust gas recirculation (EGR) control mechanism on engine performance parameters and the aerodynamic properties of the EGR value, for optimum emission control. Thermodynamic engine models were used for the simulation of the combustion process. Cycle peak temperature reduction was used to assess the EGR system in the emission control of NOx. Hence, the simulation was structured to yield the volume, temperature and pressure of the engine cylinder, every degree crank angle at varying% EGR (say 0 to 20% of recycled exhaust gas). The effect of% EGR on indicated power, indicated thermal efficiency, indicated mean effective pressure, cycle peak temperature and cycle peak pressure were simulated. Aero dynamic properties of the EGR value were simulated to examine the factors that affect the EGR value in metering the required quantity of recycled exhaust gas into the engine intake. The effect of temperature, velocity, pressure and area of flow of the EGR gas through the EGR value were simulated. BASIC program was written to generate simulated data, which were plotted with Microsoft Excel. The principal results of this study include a reduction in the net work done by the engine (0.393 kJ at 0% EGR to 0.353 kJ at 20% EGR) as the recycled exhaust gas increases. Moreover, an inverse variation between the indicated power and% EGR existed (5.895 kW at% EGR to 5.290 kW at 20% EGR). Furthermore, an inverse variation between the cylinder peak pressure and% EGR was observed (5681 kPa at 0% EGR to 5228 kPa at 20% EGR). Overall, significant control of the emission of NOx was achieved through the use of the EGR, system, demonstrating the robustness of the proposed framework. [ABSTRACT FROM AUTHOR] |
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| Database: |
Complementary Index |