International Journal of Automotive Technology

  • 제8권2호
  • /
  • Pages.219-224
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  • 2007
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  • 1229-9138(pISSN)
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  • 1976-3832(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
권호 표지

EFFECT OF THE DIFFERENTIAL PRESSURE BY THE BLOW-BY GAS FLOW ON THE PCV VALVE WITH A CRACK

  • Song, S.M. (Graduate School, Department of Safety Engineering, Pukyong National University) ;
  • Kwon, O.H. (Division of Safety Engineering, Pukyong National University) ;
  • Lee, Y.W. (Division of Mechanical Engineering, Pukyong National University)
  • 발행 : 2007.04.30
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초록

Recently, atmospheric contaminations has become worse due to the increased number of automobile. The PCV (Positive Crankcase Ventilation) valve acts as a flow control to allow re-combustion of blow-by gas by having it flow from a crankcase to an inlet manifold suction tube. Also, during the fabrication of the PCV valve, micro cracks may occur in the valve body and be extended under operation. The excessive stress distribution and crack initiation on the PCV valve body would bring an unstable blow-by gas flow rate control and would cause valve failure. The purpose of this study is to examine the crack affects on the stress and strain variations on the PCV valve according to the inlet and outlet manifold under differential pressures. From the results, we can explain the behavior of the crack extension for a safe condition of PCV valve.

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참고문헌

  1. Anderson, T. L. (1995). Fracture Mechanics. CRC. Florida. ANSYS User's Manual III (2005)
  2. Asami, K., Sugiyama, Y. and Nakayama, S. (1994). A simple evaluation method of fracture toughness of metals by using tensile properties. JSME, Materials and Mechanics Div., A, 940-37, 174-176
  3. ASM Internationals (1990). Metals Handbook, 1, Properties and Selection. Materials Park. Ohio
  4. Cheng, N. Y. and Park, S. I. (2004). Detection of interfacial crack length by using ultrasonic attenuation coefficients on adhesively bonded jonits. Int. J. Automotive Technology 5, 4, 303-309
  5. Creager, M. (1966). Stress Corrosion Models and Some Associated Boundary Value Problems. M. S. Thesis. Lehigh University. 37
  6. Dhariwal, H. C. (1997). Control of blowby emissions and lubricating oil consumption in I.C. Energys. Energy Convers. Mgmt, 38, 10-13, 1267-1274
  7. Hoekstra, R. L., Ollier, K., Mulligan, N. and Chew, L. (1995). Experimental study of a clean burning vehicle fuel. Int. J. Hydrogen Energy 20, 9, 737-745 https://doi.org/10.1016/0360-3199(95)00008-2
  8. Lee, J. H., Choi, Y. H. and Lee, Y. W. (2005). Computational analysis of flow characteristics of a PCV valve. Trans. Korean Society of Automotive Engineers 13, 4, 66-73
  9. Lee, Y. W. (2004). A study on flow characteristics of PCV valve. Proc. ISAME, 171-176
  10. Shudo, T., Nagano, T. and Kobayashi, M. (2003). Combution characteristics of waste pyrolysis gases in an internal combustion engine. Int. J. Automotive Technology 4, 1, 1-8