Development of an Engine Oil Quality Monitoring System
엔진오일 유전상수 변화량 측정에 의한 엔진오일 품질 모니터링 시스템 개발

Sang-Myung Chun
2011 Journal of the Korean Society of Tribologists and Lubrication Engineers  
The purpose of this study is to develop an engine oil quality monitoring system to warn the abnormal condition of engine oil. To do this, first of all, it is needed a personal controller development to measure the capacitance of a pre-developed engine oil deterioration detection sensor integrated with an oil filter. To measure the capacitance of engine oil in the sensor, it is used the way measuring the electric charging time in a capacitor by impressing DC volt. This method has merits on cost
more » ... nd signal stability. The measured capacitance is compensated by comparing with the one measured by an impedance analyzer. Also, using the dielectric constant gained by an impedance analyzer, the calculating equation of the dielectric constant of engine oil related with the currently developed sensor is decided. Then, the deterioration degree of engine oil is estimated according to the change rate of dielectric constant between green oil and used oil. Finally, using this dielectric constant information together with engine oil temperature and pressure, the currently developed engine oil quality monitoring system is to tell the abnormal state of engine oil.
doi:10.9725/kstle.2011.27.3.125 fatcat:zdlvpgjf5nff3fm2nrrzpje2xq