Impact characteristics of post injection on exhaust temperature and hydrocarbon emissions of a diesel engine
Increasing exhaust gas temperature (EGT) and providing hydrocarbon (HC) reactants by in-cylinder post injection are effective measures to assist diesel engine exhaust aftertreatment operation for efficient pollution control. The aim of this study is to explore calibration guidance of post injection...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-11-01
|
| Series: | Energy Reports |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352484722006357 |
| _version_ | 1797902028573245440 |
|---|---|
| author | Zhengjiang Wang Lizhong Shen Jilin Lei Guozhong Yao Guiyong Wang |
| author_facet | Zhengjiang Wang Lizhong Shen Jilin Lei Guozhong Yao Guiyong Wang |
| author_sort | Zhengjiang Wang |
| collection | DOAJ |
| description | Increasing exhaust gas temperature (EGT) and providing hydrocarbon (HC) reactants by in-cylinder post injection are effective measures to assist diesel engine exhaust aftertreatment operation for efficient pollution control. The aim of this study is to explore calibration guidance of post injection for base engine performance and aftertreatment requirements. Therefore, the effect of start of post injection (SOPI) timing on engine performance and emissions, especially the relationship between the variations of the EGT and HC emissions caused by different post injection timings were experimentally studied with a 2.0 L high-pressure common-rail diesel engine at different loads. The results showed that the maximum torque contribution was produced by post injection at the earliest SOPI timing at all load levels. When the post injection timing was retarded, the engine brake torque decreased gradually, and more energy of the post injected fuel raised the EGT. The EGT decreased and the HC emissions increased significantly as the SOPI timing was further retarded. At the 20%, 50%, and 80% loads, the maximum EGTs were 357.7, 465.4, and 615.8 °C, increased by 11.6%, 8.6%, and 7%, respectively. The maximum HC emissions were 4932, 3929, and 2746 ppm, increased by 12.44, 1.8, and 5.18 times, respectively. Moreover, a tradeoff relationship between the EGT and the HC emissions was observed at different SOPI timings by a normalized analysis. However, no clear tradeoff relationship between the soot and the NOxemissions was found in the SOPI timing sweep. Consequently, the appropriate SOPI timing range should be determined based on the needs of the aftertreatment system, and multiple post injections may be required to simultaneously increase the EGT and provide the HC reactants for aftertreatment. The optimal SOPI timing also needs to be selected based on impacts on soot and NOxat different loads. |
| first_indexed | 2024-04-10T09:11:19Z |
| format | Article |
| id | doaj.art-b187b796c60548cc879357fe25d01084 |
| institution | Directory Open Access Journal |
| issn | 2352-4847 |
| language | English |
| last_indexed | 2024-04-10T09:11:19Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Reports |
| spelling | doaj.art-b187b796c60548cc879357fe25d010842023-02-21T05:10:53ZengElsevierEnergy Reports2352-48472022-11-01843324343Impact characteristics of post injection on exhaust temperature and hydrocarbon emissions of a diesel engineZhengjiang Wang0Lizhong Shen1Jilin Lei2Guozhong Yao3Guiyong Wang4Yunnan Province Key Laboratory of Internal Combustion Engines, Kunming University of Science and Technology, Kunming 650500, ChinaYunnan Province Key Laboratory of Internal Combustion Engines, Kunming University of Science and Technology, Kunming 650500, ChinaCorresponding author.; Yunnan Province Key Laboratory of Internal Combustion Engines, Kunming University of Science and Technology, Kunming 650500, ChinaYunnan Province Key Laboratory of Internal Combustion Engines, Kunming University of Science and Technology, Kunming 650500, ChinaYunnan Province Key Laboratory of Internal Combustion Engines, Kunming University of Science and Technology, Kunming 650500, ChinaIncreasing exhaust gas temperature (EGT) and providing hydrocarbon (HC) reactants by in-cylinder post injection are effective measures to assist diesel engine exhaust aftertreatment operation for efficient pollution control. The aim of this study is to explore calibration guidance of post injection for base engine performance and aftertreatment requirements. Therefore, the effect of start of post injection (SOPI) timing on engine performance and emissions, especially the relationship between the variations of the EGT and HC emissions caused by different post injection timings were experimentally studied with a 2.0 L high-pressure common-rail diesel engine at different loads. The results showed that the maximum torque contribution was produced by post injection at the earliest SOPI timing at all load levels. When the post injection timing was retarded, the engine brake torque decreased gradually, and more energy of the post injected fuel raised the EGT. The EGT decreased and the HC emissions increased significantly as the SOPI timing was further retarded. At the 20%, 50%, and 80% loads, the maximum EGTs were 357.7, 465.4, and 615.8 °C, increased by 11.6%, 8.6%, and 7%, respectively. The maximum HC emissions were 4932, 3929, and 2746 ppm, increased by 12.44, 1.8, and 5.18 times, respectively. Moreover, a tradeoff relationship between the EGT and the HC emissions was observed at different SOPI timings by a normalized analysis. However, no clear tradeoff relationship between the soot and the NOxemissions was found in the SOPI timing sweep. Consequently, the appropriate SOPI timing range should be determined based on the needs of the aftertreatment system, and multiple post injections may be required to simultaneously increase the EGT and provide the HC reactants for aftertreatment. The optimal SOPI timing also needs to be selected based on impacts on soot and NOxat different loads.http://www.sciencedirect.com/science/article/pii/S2352484722006357Diesel engineCommon railMultiple injectionPost injectionCalibration |
| spellingShingle | Zhengjiang Wang Lizhong Shen Jilin Lei Guozhong Yao Guiyong Wang Impact characteristics of post injection on exhaust temperature and hydrocarbon emissions of a diesel engine Energy Reports Diesel engine Common rail Multiple injection Post injection Calibration |
| title | Impact characteristics of post injection on exhaust temperature and hydrocarbon emissions of a diesel engine |
| title_full | Impact characteristics of post injection on exhaust temperature and hydrocarbon emissions of a diesel engine |
| title_fullStr | Impact characteristics of post injection on exhaust temperature and hydrocarbon emissions of a diesel engine |
| title_full_unstemmed | Impact characteristics of post injection on exhaust temperature and hydrocarbon emissions of a diesel engine |
| title_short | Impact characteristics of post injection on exhaust temperature and hydrocarbon emissions of a diesel engine |
| title_sort | impact characteristics of post injection on exhaust temperature and hydrocarbon emissions of a diesel engine |
| topic | Diesel engine Common rail Multiple injection Post injection Calibration |
| url | http://www.sciencedirect.com/science/article/pii/S2352484722006357 |
| work_keys_str_mv | AT zhengjiangwang impactcharacteristicsofpostinjectiononexhausttemperatureandhydrocarbonemissionsofadieselengine AT lizhongshen impactcharacteristicsofpostinjectiononexhausttemperatureandhydrocarbonemissionsofadieselengine AT jilinlei impactcharacteristicsofpostinjectiononexhausttemperatureandhydrocarbonemissionsofadieselengine AT guozhongyao impactcharacteristicsofpostinjectiononexhausttemperatureandhydrocarbonemissionsofadieselengine AT guiyongwang impactcharacteristicsofpostinjectiononexhausttemperatureandhydrocarbonemissionsofadieselengine |