Investigation of post-oxidation mechanism on emissions and turbo performance in a DISI engine

TY - JOUR

T1 - Investigation of post-oxidation mechanism on emissions and turbo performance in a DISI engine

AU - Kumar, Madan

AU - Moeeni, Salaar

AU - Kuboyama, Tatsuya

AU - Moriyoshi, Yasuo

N1 - Publisher Copyright: © 2020 Elsevier Ltd

PY - 2021/2/15

Y1 - 2021/2/15

N2 - A detailed investigation of ignition and injection timing influence on post-oxidation phenomenon which in-turn can improve turbo-performance along with the emissions of a turbocharged (SI) engine. In this research a novel methodology by adopting the scavenging-based post-oxidation phenomenon was investigated. Firstly, 1-D simulation model was developed, and the model was validated with the experimental results. Then, the simulation was used for the investigation of ignition and injection timing influence on post-oxidation. Thereafter, experimental tests for the post-oxidation were conducted. From the results, it can be stated that the retard of ignition timing shifts the combustion phase towards late which increased the exhaust pressure and temperature. This could increase the chances of the actuation of the post-oxidation reaction in the exhaust manifold. Moreover, it was also found that the injection of fuel during the overlap phase and after overlap had significant influence on the post-oxidation process. Fuel injection during the overlap can increase the possibility of scavenging a fraction of fuel and promote post-oxidation reaction. In both cases, it was found that the emissions and turbo-performance become better at late spark and early injection timing due to oxidation reaction. However, thermal efficiency was affected which will be optimized in the future.

AB - A detailed investigation of ignition and injection timing influence on post-oxidation phenomenon which in-turn can improve turbo-performance along with the emissions of a turbocharged (SI) engine. In this research a novel methodology by adopting the scavenging-based post-oxidation phenomenon was investigated. Firstly, 1-D simulation model was developed, and the model was validated with the experimental results. Then, the simulation was used for the investigation of ignition and injection timing influence on post-oxidation. Thereafter, experimental tests for the post-oxidation were conducted. From the results, it can be stated that the retard of ignition timing shifts the combustion phase towards late which increased the exhaust pressure and temperature. This could increase the chances of the actuation of the post-oxidation reaction in the exhaust manifold. Moreover, it was also found that the injection of fuel during the overlap phase and after overlap had significant influence on the post-oxidation process. Fuel injection during the overlap can increase the possibility of scavenging a fraction of fuel and promote post-oxidation reaction. In both cases, it was found that the emissions and turbo-performance become better at late spark and early injection timing due to oxidation reaction. However, thermal efficiency was affected which will be optimized in the future.

KW - Emissions

KW - Injection timing

KW - Post-oxidation

KW - Scavenging

KW - Turbo-performance

KW - Valve overlap

UR - http://www.scopus.com/inward/record.url?scp=85097234660&partnerID=8YFLogxK

U2 - 10.1016/j.energy.2020.119465

DO - 10.1016/j.energy.2020.119465

M3 - 文章

AN - SCOPUS:85097234660

SN - 0360-5442

VL - 217

JO - Energy

JF - Energy

M1 - 119465

ER -