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이 논문의 연구 히스토리 (2)

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As a method of variable valve train(VVT), Electromagnetic valve(EMV) has been studied.
Compared with conventional VVT system, the EMV system has a relatively simple structure.
The system has two electromagnets, springs and an armature. The system can be operated by reciprocal action between armature and two electromagnets. And, the operating event can be controlled by electrical signal from controller. Therefore, reduction of emission and fuel consumption can be achieved through valve event control at each engine operating condition.
In this study, characteristics of EMV system were investigated by simulations and experiments. The results of simulation and experiment show that the core shape and material characteristics are dominant parameters on magnetic force and delay time. In order to apply the system to commercial engine, it has a compact size and high stiffness springs(50N/mm) to increase the valve speed. Because of high valve seating velocity, loud noise and high impact force generated, which can lead to reduction of actuator durability. Therefore, further research is required to reduce valve seating velocity

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1.서론

2.본론

3.실험장치 및 실험방법

4.결과 및 고찰

4.결론

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UCI(KEPA) : I410-ECN-0101-2009-556-014001861