A Review of the External and Internal Residual Exhaust Gas in the Internal Combustion Engine

Nguyen Xuan Khoa and Ocktaeck Lim
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Nguyen Xuan Khoa: Faculty of Automobile Technology, HaNoi University of Industry, No. 298, Cau Dien Street, Bac Tu Liem District, Hanoi 100000, Vietnam
Ocktaeck Lim: School of Mechanical Engineering, University of Ulsan, 93 Daehak-ro, Nam-gu, Ulsan 44610, Korea

Energies, 2022, vol. 15, issue 3, 1-21

Abstract: Efficiency and emission reduction are the primary targets of internal combustion engine research due the large number of vehicles in operation and the impact of emissions-related pollution on human and ecosystem health. Harmful components of engine exhaust gases include nitrous oxides (NO x ), carbon dioxide, hydrocarbons, and particulate matter. NO x emissions in particular are associated with significant health threats. The recirculation of exhaust gases can reduce NO x emissions and improve engine efficiency when combined with other advanced techniques. On the other hand, the residual exhaust gas also effects on the quality of lubricating engine oil and therefore causes an increase in engine piston ring wear. In this review paper, the effects of external and internal exhaust gas recirculation on the performance and emission characteristics of diesel, gasoline, and alternative fuel engines are summarized and discussed in detail. Because it is difficult to estimate the internal residual exhaust gas in the combustion engine by doing experiments. This review paper introduces control strategies and prediction methods for internal and external exhaust gas recirculation.

Keywords: external exhaust gas recirculation; internal exhaust gas recirculation; NO x emission; engine performance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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