Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
권호 표지
DOI QR코드

DOI QR Code

Process Improvement of Land System Engine for Visualization and Increasing Identification of Engine Oil Leakage

엔진오일 누유 가시화 및 식별력 증대를 위한 기동화력장비 엔진 공정개선

  • Seo, Suk Ho (Defense Agency for Technology and Quality) ;
  • Kim, Ji Hoon (Defense Agency for Technology and Quality) ;
  • Oh, Dae San (Defense Agency for Technology and Quality)
  • Received : 2019.11.18
  • Accepted : 2020.03.06
  • Published : 2020.03.31
Download PDF
⟨ Previous Next ⟩

Abstract

Engine oil leaks comprise the largest percentage of the major quality problems that have occurred during the engine production process for military land system equipment over the last two years. To minimize this, it is essential to understand the root cause of the engine oil leakage and perceive the more common leakage area, as well as reduce the quality costs of pre-identification for leaks in the engine assembly process and single items. Therefore, in this study, the mass production quality of engines installed and operated in power equipment was improved by visualizing the engine oil leakage injected with the fluorescent dye and increasing the identification of the engine oil leak phenomenon. For this reason, the possibility of substituting the engine oil was considered and the engine oil was injected with the fluorescent dye. The maintenance was improved by reforming the engine oil injection process and leakage inspection process. Finally, these results suggest that the quality costs between mass production processes can be minimized by ensuring the reliability of military engines by reducing the user's complaints and improving the quality control capabilities of engine manufacturers.

최근 2년간 군 기동화력장비의 엔진 생산 공정 중에 발생한 주요 품질문제 중에는 엔진오일 누유가 가장 많은 비중을 차지하고 있다. 이를 최소화하기 위해서는 엔진오일 누유에 대한 근본적인 원인 파악과 다빈도로 발생되는 누유 부위에 대한 파악이 필요할 뿐만 아니라 더 나아가 품질비용 감소를 위해서는 엔진 조립 및 검사공정에서 누유에 대한 사전식별이 필요하다. 본 연구에서는 형광염료가 주입된 엔진오일을 통하여 누유를 가시화하고 엔진오일 누유 현상에 대한 식별성을 증대시켜 군 기동화력장비 엔진의 생산품질을 향상시키고자 하였다. 이를 위하여 기존에 사용하는 엔진오일과 형광염료가 주입된 엔진오일의 특성분석을 통하여 대체 가능성에 대해 검토하였으며 엔진오일 주입 공정과 누유검사 공정을 개선하여 엔진오일 누유에 의하여 발생할 수 있는 정비기간 및 시간을 최소화 시키고자 하였다. 최종적으로 본 연구결과를 토대로 군 기동화력장비 엔진의 신뢰도 확보 및 엔진 생산업체의 품질관리 능력 향상을 통하여 엔진 생산 공정간 발생할 수 있는 품질비용을 최소화 시킬 수 있다고 사료된다.

Keywords

References

  1. G. Pitcher, Dr. G. Wigley, and M. Saffman, "Velocity and drop size measurements in fuel sprays in a direct injection diesel engine", Particle Systems Characterization, Vol 7, No. 1, pp. 160-168, Feb. 1990. DOI: http://doi.org/0176-2265/90/0309-00160 https://doi.org/10.1002/ppsc.19900070129
  2. R. B. Joly, S. O. T. Ogaji, R. Singh, and S. D. Probert, "Gas-turbine diagnostics using artificial neural-networks for a high bypass ratio military turbofan engine" Journal of Applied Engine, Vol. 78, No. 4, pp. 397-418, Aug. 2004. DOI: https://doi.org/10.1016/j.apenergy.2003.10.002
  3. L. Wong, E. Jefferis, and N. Montgomery, "Proportional hazards modeling of engine failures in military vehicles", Journal of Quality in Maintenance Engineering, Vol. 16, No. 2, pp. 144-155. Jun. 2010. DOI: https://doi.org/10.1108/13552511011048896
  4. E. J. Ekanem, J. A. Lori, and S. A. Thomas, "The determination of wear metals in used lubricating oils by flame atomic absorption spectrometry using sulphanilic acid as ashing agent", Talanta, Vol. 44, No. 11, pp. 2103-2108, Nov. 1997. DOI: https://doi.org/10.1016/S0039-9140(97)00086-6
  5. G. K. Sharma and O. P. Chawla, "Modelling of lubricant oil alkalinity in diesel engines", Tribology International, Vol. 21, No. 5, pp. 269-274, Oct. 1988. DOI: https://doi.org/10.1016/0301-679X(88)90004-7
  6. Y. Uehara, M. Wakuda, Y. Yamauchi, S. Kanzaki, and S. Sakaguchi, "Tribological properties of dimpled silicon nitride under oil lubrication", Journal of the European Ceramic Society, Vol. 24, No. 2, 2004. DOI: https://doi.org/10.1016/S0955-2219(03)00220-6
  7. J. G. Choi, "Future trends of gasoline engine oil", Journal of the Korean Society of Automotive Engineers, Vol. 20, No. 4, pp. 29-39, Aug. 1998.
  8. I. G. Lee and Y. S. Jeon "Case study on Functions of Engine oils and oil related failures", Journal of the Korean Society of Automotive Engineers, Vol. 20, No. 4, pp. 51-59, Aug. 1998.
  9. J. Park, B. Partridge, and S. Whitacre, "Rapid in-Situ Measurement of Fuel Dilution of Oil in a Diesel Engine using Laser-Induced Fluorescence Spectroscopy," 42 pages, October 29, 2007 by SAE International, 42 pages. DOI: https://doi.org/10.4271/2007-01-4108
  10. C. R. Cho., "Leakage Detcting system of Disel Engine Injector and Algorithm of Controlling System", Korean Intellectual Priority Office, 10-2003-0030938, 2003.
  11. Korea Standard, KS M 2121, "Internal Combustion Engine Oils", Dec. 2015.