车用润滑油在线监测方法与监测系统.pdfVIP

39 6 吉林 大学 学 报 ( 工学 版) Vol. 39 No. 6 2009 11 Journal of Jilin University (Engineering and Tec nology Edition) Nov. 2009 1 2 1 3 1 刘玉梅 , 王庆年 , 曹晓宁 , 熊 伟 , 李雪海 ( 1. 吉林大学 交通学院, 长春 130022; 2. 吉林大学 汽车工程学院, 长春 130022; 3. 长春轨道客车股份有限 公司, 长春 130025) : 通过理论和试验分析的 法确定了介电常数作为润滑油品质衰变评价指标的可行性, 研发了准确检测润滑油介电常数的玻璃管型车载电容传感器及脉冲调宽式振荡检测电路, 并 以此为基础开发了润滑油综合性能在线监测系统, 从而实现了车用润滑油的按质换油, 克服了 观察换油或 按期换油的弊端 : 车辆工程; 润滑油; 介电常数; 电容式传感器; 在线监测系统 : U 473. 6 : A : 1671-5497( 2009) 06- 1441-05 Vehicle lubrication oil on-line monitoring method and monitoring system 1 2 1 3 1 LIU Yu-mei , WANG Qing-nian , CAO Xiao-ning , XION G Wei , LI Xue- ai ( 1. Collegeof Transp ortation, Jilin University , Changchun 130022, China; 2. College of Automotive Engineering, Jilin University , Changchun 130022, China; 3. Changechun Railway Vehicle C . LTD, Changchun 130025, China) Abstract: T e feasibility of using t e dielectric constant as an evaluation index to evaluate t e quality degradation of t e lubrication oil w as verified t roug t eoretical analysis and experimental approac . A glass-tube sensor to detect accurately t e dielectric constant of t e lubrication oil and a related PWM oscillation delection circuit w ere developed. A monitoring system to monitor on-line t e compre ensive properties of t e lubrication oil was made up based on t e above-mentioned components, t us realizing to c ange t e ve icle lubrication oil according to its quality instead of according to visual obserration or on sc edule. Key words: ve cile engineering; lubrication oil; dielectric constant; capacitance sensor; on-line monitoring system , [ 1]