Application of UV fluorescence data mining to engine coolant monitoring

Data mining has been widely used in many aspects of industrial production, agriculture and daily life. Using spectral analysis to monitor objects can obtain much more information than traditional methods. The crack in combustion chamber of internal combustion engine is an occasional fault, but once it happens, it deteriorates quickly and causes serious harm. The commonly used monitoring methods include disassembly inspection after shutdown or endoscopy after shutdown. This method is time-consuming, laborious and inefficient, and cannot meet the requirements of current equipment management. A method of UV fluorescence analysis of the coolant is proposed to quickly detect whether there is diesel fuel in the coolant and determine whether there is crack in the combustor. By irradiating the coolant with 275nm excitation light source, the spectral data of 260nm-1060nm wide spectrum can be obtained. The fluorescent characteristics of diesel fuel in cooling water indicate that there may be cracks in the combustion chamber. The fluorescent characteristics of lubricating oil in cooling water indicate the possibility of leakage of lubricating oil cooler. It provides an efficient and fast method for monitoring the incipient faults of diesel engine such as combustion chamber crack and oil cooler leakage.