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논문 상세정보

엔진오일의 화학적 및 물리적 변화에 의한 퇴화정도와 유전상수 변화에 관한 상호관계 연구 - 가솔린엔진오일

Study on Mutual Relation between the Level of Deterioration Influenced by the Changes of Chemical and Physical Properties and the Change of Dielectric Constant for Engine Oil - Gasoline Engine Oil

Abstract

The dielectric constants of used gasoline engine oils were obtained at a few temperatures and a frequency. Through analyzing the characteristics of dielectric constant, the related correlation between the changes in dielectric constants of oil and the degree of oil deterioration is going to be found. The dielectric constant was calculated using cross capacitances measured by a sensor tube. As results of the measurement of the fresh engine oil's dielectric constant, it was found that the value of dielectric constant was set down below $60^{\circ}C$ regardless changing frequency. Further, above 6 kHz, the dielectric constant was set down even if temperature was above $100^{\circ}C$ Therefore, for the measurement of used oils, it was selected the frequency of 6 kHz,,and the temperature of $80^{\circ}C$ preventing a certain ionic-conduction effects on the measured dielectric constant and the evaporation of a certain fluid mixed with engine oil. Specially, the effects of the mixing fluid like coolant, water and fuel on the fresh engine oil's dielectric constant were studied. It was found that the oil mixed with coolant showed the highest value, next water, and the lowest fuel. As results of the measurement of the used engine oil's dielectric constant, it was found that the possible changed rate of the used engine oil's dielectric constant based on the warning limit for engine oil in service was below 4% for gasoline engine oil.

저자의 다른 논문

참고문헌 (9)

  1. Thom, R., Kollmann, K., Warneke, W. and Frend, M., 'Extended Oil Drain Intervals: Conservation of Resources or Reduction of Engine Life,' SAE Technical Paper Series No. 951035, 1995 
  2. Saloka, G. S. and Meitzler, A. H., 'A Capacitive Oil Deterioration Sensor,' SAE Technical Paper Series No. 910497, 1991 
  3. Shell Oil Co. LTD., Shell Automotive Lubricants & Lubrication 
  4. Chun, S. M., 'A Study on the Changes in Dielectric Constant of Engine Oil,' Journal of the KSTLE, Vol. 22, No. 2, April 2006, pp. 99-104 
  5. Oronite Additives, Chevron Research Company, Testing Used Engine Oils-Recommended Warning Limit for Engine Oil in Service, 1983 
  6. Hella Inc., Presentation Materials of Hella Oil Sensors 
  7. Irion, E., Land, K., Gurtler, T. and Klein, M., 'Oil-Quality Prediction and Oil-Level Detection with the TEMIC QTL-Sensor Leads to Variable Maintenance Intervals,' SAE Technical Paper Series No. 970847, SP-1220, 1997 
  8. 이래덕, 김한준, Semenov, Yu. P., '전기용량 측정에 의한 자동차 엔진오일 열화상태 분석연구,' 새물리(한국물리학회지), 제42권, 제4호, pp .216-220, 2001 
  9. 한국석유품질관리원, 내연기관용 윤활유 품질기준 (KS M 2121) 

이 논문을 인용한 문헌 (8)

  1. Chun, Sang-Myung 2008. "The Prototype Development of an Engine Oil Deterioration Sensor Installed Inside an Oil Filter" 윤활학회지 = Journal of the Korean Society of Tribologists and Lubrication Engineers, 24(2): 82~89 
  2. Chun, Sang-Myung 2008. "The Prototype Development II of an Engine Oil Deterioration Sensor Installed Inside an Oil Filter" 윤활학회지 = Journal of the Korean Society of Tribologists and Lubrication Engineers, 24(4): 170~178 
  3. Chun, Sang-Myung 2010. "A Study on the Effect of Soot on Changes in Diesel Engine Oil's Dielectric Constant" 윤활학회지 = Journal of the Korean Society of Tribologists and Lubrication Engineers, 26(2): 111~121 
  4. Chun, Sang-Myung 2011. "Development of Sensing System for an Engine Oil Deterioration Detection Sensor Integrated with an Oil Filter" Journal of sensor science and technology = 센서학회지, 20(4): 243~248 
  5. Chun, Sang-Myung 2011. "Development of an Engine Oil Quality Monitoring System" 윤활학회지 = Journal of the Korean Society of Tribologists and Lubrication Engineers, 27(3): 125~133 
  6. Kim, Ki-Hoon ; Kim, Young-Ju 2011. "Microwave Rectangular Waveguide Measurement of the Engine Oil Dielectric Constant" 윤활학회지 = Journal of the Korean Society of Tribologists and Lubrication Engineers, 27(3): 156~161 
  7. Chun, Sang Myung 2014. "Analysis of Test Results for Small Dipstick-Gage-Type Engine-Oil-Deterioration-Detection Sensor" 윤활학회지 = Journal of the Korean Society of Tribologists and Lubrication Engineers, 30(3): 156~167 
  8. Chun, Sang Myung 2014. "Development of Oil Change Warning Algorithm and Display Device" 윤활학회지 = Journal of the Korean Society of Tribologists and Lubrication Engineers, 30(3): 168~176 

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