Loading...
Please wait, while we are loading the content...
Effect of Divided Exhaust Period in a High Efficiency TGDI Engine
| Content Provider | MDPI |
|---|---|
| Author | Oh, Heechang Jung, Dongwon Son, Jinwook Woo, Soohyung Roth, David Song, Jerry Kweon, Youngmyung Hwang, Joonsik |
| Copyright Year | 2021 |
| Description | The divided exhaust period (DEP) concept was applied to a high-efficiency gasoline engine and its impact on various engine performance aspects were investigated. To this end, key design parameters of DEP components were optimized through 1-D engine simulation. The designed DEP components were fabricated and experimental verification was performed through an engine dynamometer test. The developed DEP engine shows suitable performance for electrified vehicles, with a maximum thermal efficiency of 42.5% as well as a wide sweet spot area of efficiency over 40%. The improvement in thermal efficiency was mainly due to a reduction in pumping loss. Notably, the reduction in pumping loss was achieved under high exhaust gas recirculation (EGR) flow conditions, where further improvements in fuel consumption could be achieved through a synergistic combination of DEP implementation and high dilution combustion. Furthermore, a significantly improved catalyst light-off time, uncharacteristic in turbocharged engines, was confirmed through a simulated cold-start catalyst heating engine test. |
| Starting Page | 6343 |
| e-ISSN | 19961073 |
| DOI | 10.3390/en14196343 |
| Journal | Energies |
| Issue Number | 19 |
| Volume Number | 14 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-10-04 |
| Access Restriction | Open |
| Subject Keyword | Energies Aerospace Engineering Divided Exhaust Period (dep) Turbocharged Gasoline Direct Injection (tgdi) Exhaust Gas Recirculation (egr) Gasoline Engine Dedicated Hybrid Engine (dhe) High Efficiency |
| Content Type | Text |
| Resource Type | Article |
