Effect of Divided Exhaust Period in a High Efficiency TGDI Engine
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 fabric...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-10-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/19/6343 |
| _version_ | 1797516616312815616 |
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| author | Heechang Oh Dongwon Jung Jinwook Son Soohyung Woo David Roth Jerry Song Youngmyung Kweon Joonsik Hwang |
| author_facet | Heechang Oh Dongwon Jung Jinwook Son Soohyung Woo David Roth Jerry Song Youngmyung Kweon Joonsik Hwang |
| author_sort | Heechang Oh |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-10T07:03:22Z |
| format | Article |
| id | doaj.art-f5b7e480b7a746a5ab72f1430c125f54 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T07:03:22Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-f5b7e480b7a746a5ab72f1430c125f542023-11-22T16:02:57ZengMDPI AGEnergies1996-10732021-10-011419634310.3390/en14196343Effect of Divided Exhaust Period in a High Efficiency TGDI EngineHeechang Oh0Dongwon Jung1Jinwook Son2Soohyung Woo3David Roth4Jerry Song5Youngmyung Kweon6Joonsik Hwang7R&D Division, Hyundai Motor Company, Hwaseoung-si 18290, Gyeonggi-do, KoreaR&D Division, Hyundai Motor Company, Hwaseoung-si 18290, Gyeonggi-do, KoreaR&D Division, Hyundai Motor Company, Hwaseoung-si 18290, Gyeonggi-do, KoreaR&D Division, Hyundai Motor Company, Hwaseoung-si 18290, Gyeonggi-do, KoreaRoth Engine Science LLC, Groton, NY 13073, USANavistar Inc., Lisle, IL 60532, USABorgWarner Chungju, Chungju-si 27465, Chungcheongbuk-do, KoreaDepartment of Mechanical Engineering, Mississippi State University, Starkville, MS 39762, USAThe 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.https://www.mdpi.com/1996-1073/14/19/6343divided exhaust period (DEP)turbocharged gasoline direct injection (TGDI)exhaust gas recirculation (EGR)gasoline enginededicated hybrid engine (DHE)high efficiency |
| spellingShingle | Heechang Oh Dongwon Jung Jinwook Son Soohyung Woo David Roth Jerry Song Youngmyung Kweon Joonsik Hwang Effect of Divided Exhaust Period in a High Efficiency TGDI Engine Energies divided exhaust period (DEP) turbocharged gasoline direct injection (TGDI) exhaust gas recirculation (EGR) gasoline engine dedicated hybrid engine (DHE) high efficiency |
| title | Effect of Divided Exhaust Period in a High Efficiency TGDI Engine |
| title_full | Effect of Divided Exhaust Period in a High Efficiency TGDI Engine |
| title_fullStr | Effect of Divided Exhaust Period in a High Efficiency TGDI Engine |
| title_full_unstemmed | Effect of Divided Exhaust Period in a High Efficiency TGDI Engine |
| title_short | Effect of Divided Exhaust Period in a High Efficiency TGDI Engine |
| title_sort | effect of divided exhaust period in a high efficiency tgdi engine |
| topic | divided exhaust period (DEP) turbocharged gasoline direct injection (TGDI) exhaust gas recirculation (EGR) gasoline engine dedicated hybrid engine (DHE) high efficiency |
| url | https://www.mdpi.com/1996-1073/14/19/6343 |
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