| 제목 |
The effects of variable valve timing on exhaust residual gas, effective release energy and engine power of a motorcycle engine in various engine speed bands |
| 분야 |
연료 및 윤활유/연비 |
| 언어 |
English |
| 저자 |
웬수언코아(울산대학교), 임옥택(울산대학교), 장성욱(세종공업), 박성규(KR모터스), 신용호(KR모터스) |
| Key Words |
Valve over lap, residual gas, engine torque, effective release energy |
| 초록 |
The purpose of this research is to study how positive valve overlap affects the exhaust residual gas, effective release energy and performance of motorcycle engines. To achieve this goal, an experimental system is installed with a dynamo testing system, and a simulation model is established using AVL-Boost software. The simulation model is used to determine the residual gas ratio, effective release energy, and engine performance in variable valve timing and engine speed bands. In this research, the valve overlap is increased from a 10 degree to 90 degree crank angles. The engine testing speed band is from 2000 rpm – 10000 rpm. The effect of valve over lap in three cases IVEO, EVLO and IVEO & EVLO on engine performance with low engine speed (2000 rpm), midle engine speed (5000 rpm) and high engine speed (8000 rpm) also were studied. The results show that positive valve overlap has a significant effect on residual gas ratio, effective release energy and engine performance. When valve overlap angle changes, the residual gas ratio and effective release energy change in various trends of engine speed. |
| 원문(PDF) |
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