The hydraulic equipments has a high utilization in the many works such as the excavation, planation and crane works in the construction sites. They are an essential equipments in the construction site and the loading & unloading works of the large size objects. In the many parts which are composed of the hydraulic equipments, the main control valve(MCV) is the core of the equipments. The hydraulic energy from the pump controls the direction and the rate of flow and supply the pressure energy to the some actuators by MCV. In spite of the domestically producing of the common control valves, the MCV which used to the domestic equipments is imported the whole quantity. In this study, it is to reverse-engineer the MCV as the first step in the development of the MCV. To analyze the notch of the spool and the flow path and to apply the formula technique, we try to realize the optimal modeling of the MCV.

Abstract
 1. 서론
 2. 유압장치의 주제어밸브의 모델링
  2.1 모델링의 필요성
  2.2 모델링 방법
  2.3 3차원 모델링 및 시뮬레이션
 3. 결론
 후기
 References

• 이태근(대덕대학교 정밀기계공학과) | Tae-Keun Lee
• 김태규(대덕대학교 정밀기계공학과) | Tae-Kyu Kim Corresponding Author
• 김병삼(원광대학교 공과대학 기계자동차공학부) | ·Byoung-Sam Kim