Performance improvement of turbocharged SI engine by post-oxidation enhancement in exhaust gas in-homogeneity

TY - JOUR

T1 - Performance improvement of turbocharged SI engine by post-oxidation enhancement in exhaust gas in-homogeneity

AU - Kumar, Madan

AU - Moeeni, Salaar

AU - Kuboyama, Tatsuya

AU - Moriyoshi, Yasuo

N1 - Publisher Copyright: © IMechE 2020.

PY - 2021/9

Y1 - 2021/9

N2 - In this research, the improvement of mixing and pulsation in exhaust manifold with a design and implementation of bypass adapter at exhaust port were deeply investigated. This in-turn can improve the post-oxidation phenomena and hence emissions and engine performance could be enhanced. This research investigation includes 1-D, 3-D simulations and experimental validation on a 4-cylinder turbocharged spark ignition (SI) engine. Firstly, the 1-D and 3-D simulation models were developed and calibrated with the experimental results. Then, the simulations were used for the detailed investigation of mixing and pulsation in exhaust manifold with and without bypass adapter. Thereafter, experimental test for the post-oxidation were conducted with and without consideration of the bypass adapter and results were compared. From the simulation and experimental results, it was proven that by using bypass adapter at the exhaust port, the mixing of exhaust gas species was observed to be significantly improved to some extent. Also, the unbalance between exhaust port and turbocharger upstream gas species were reduced. This also reduced the exhaust gas pulsation. By the improvement of mixing between scavenged O2 and unburned gas species, the post-oxidation reaction was also noted to have improved and consequently the emissions and turbo-speed were found to be better that led to an improved IMEP and thermal efficiency of the engine.

AB - In this research, the improvement of mixing and pulsation in exhaust manifold with a design and implementation of bypass adapter at exhaust port were deeply investigated. This in-turn can improve the post-oxidation phenomena and hence emissions and engine performance could be enhanced. This research investigation includes 1-D, 3-D simulations and experimental validation on a 4-cylinder turbocharged spark ignition (SI) engine. Firstly, the 1-D and 3-D simulation models were developed and calibrated with the experimental results. Then, the simulations were used for the detailed investigation of mixing and pulsation in exhaust manifold with and without bypass adapter. Thereafter, experimental test for the post-oxidation were conducted with and without consideration of the bypass adapter and results were compared. From the simulation and experimental results, it was proven that by using bypass adapter at the exhaust port, the mixing of exhaust gas species was observed to be significantly improved to some extent. Also, the unbalance between exhaust port and turbocharger upstream gas species were reduced. This also reduced the exhaust gas pulsation. By the improvement of mixing between scavenged O2 and unburned gas species, the post-oxidation reaction was also noted to have improved and consequently the emissions and turbo-speed were found to be better that led to an improved IMEP and thermal efficiency of the engine.

KW - Post-oxidation

KW - bypass adapter

KW - emissions

KW - exhaust gas species in-homogeneity

KW - pulsation

KW - scavenging

KW - turbocharger

UR - http://www.scopus.com/inward/record.url?scp=85091530661&partnerID=8YFLogxK

U2 - 10.1177/1468087420960870

DO - 10.1177/1468087420960870

M3 - 文章

AN - SCOPUS:85091530661

SN - 1468-0874

VL - 22

SP - 2931

EP - 2944

JO - International Journal of Engine Research

JF - International Journal of Engine Research

IS - 9

ER -