| 제목 |
NUMERICAL AND EXPERIMENTAL STUDY ON KNOCK SOURCES IN SPARK IGNITION ENGINE WITH ELECTROMAGNETIC VALVE TRAIN |
| 분야 |
Engine and Emissions |
| 언어 |
English |
| 저자 |
Jiangtao Xu(Nanjing Institute of Industry Technology), Yong Feng(Nanjing Institute of Industry Technology), Siqin Chang(Nanjing University of Science and Technology), Tongjun Guo(Nanjing University of Science and Technology) |
| Key Words |
High compression ratio, Knock, Exhaust gas recirculation, Electromagnetic valve train, Miller cycle |
| 초록 |
As one of the most common engine types in nowadays, the thermal efficiency of spark-Ignition (SI) engine is limited due to the lower compression ratio. Various technical solutions have been proposed to suppress knock and improve compression ratio of SI engines. In this paper, an new technical solution based on electromagnetic valve train (EMVT) was proposed to suppress knock of spark ignition engines, so that high compression ratio (HCR) engine (13:5) was obtained. Moreover, experimental and numerical analyses were carried out to optimize the proposed EMVT strategy. The result showed that the proposed EMVT strategies could well suppress the engine knock by reducing end-gas temperature and pressure and improving the spark-flame rate, resulting in significantly enhanced power, economic, and emission characteristics of SI engines. This study provides theoretical basis and technical approach for the development of internal combustion engines with high efficiency and high compression ratio. |
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