Numerical Analytic Study on Internal Flow Characteristics of a PCV valve

PCV 밸브 내부 유동특성에 관한 수치해석적 연구

  • 이종훈 (부경대학교 일반대학원 기계공학부) ;
  • 이연원 (부경대학교 기계공학부) ;
  • 김재환 ((주)이원정공 기술연구소)
  • Published : 2005.12.01


An automobile engine has the Positive Crankcase Ventilation system (PCV system) for preventing air pollution as the environmental problem is important In this system, a PCV valve is the most important component to control the flow rate of Blowby gas which is generated by various engine powers. But, in the working place, the design of a PCV valve is very difficult because of interaction between fluid and solid motions. In this study, we investigated fluid flow characteristics using re-meshing method of a CFD technique to simulate spool behavior. As the results, a spool is periodically oscillated with time and is largely oscillated in proportion to the differential pressure between inlet and outlet. And, although the velocity at the orifice increases with the differential pressure, the flow rate of the outlet decreases. This research may give PCV designers visual flow information to help them