Abstract
The condition of the motor oil in civilian cars is difficult to monitor; hence, we propose a method to evaluate the degree of degradation of motor oil using an on-board diagnostic (OBD) system. Three civilian cars and four motor oils (containing mineral oils and synthetic oils) were subjected to five groups of road tests under urban traffic and high-way conditions. The operation information, oil service time, mileage, engine operation time, idle time of the engine, and number of start-ups of the engine were obtained using the proposed OBD system. Physiochemical properties and changes in the components of motor oils during road tests were analyzed in laboratory. The theoretical model of the comprehensive indicators of driving parameters and oil properties were established. The proposed method was successfully applied to different cars, motor oils, and operating conditions in road tests. All the theoretical models had high accuracy and precision. Herein, we provide a method to monitor the oil condition with real-time driving parameters and provide a reference for end users to change their motor oil reasonably.
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The authors are grateful for the financial support from the National Natural Science Foundation of China (No. 51575402).
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Lei WEI. He obtained his bachelor degree in 2011 from Wuhan Textile University and Ph.D degree in 2018 from Wuhan Research Institute of Materials Protection. His research areas include motor oil life monitoring and oil degradation analysis. He has participated in many research projects.
Jian LI. He is a professor, obtained his master degree in 1995 from Xi’an Jiaotong University. He is the vicechief engineer of Wuhan Research Institute of Materials Protection. His research interests cover the surface coating, lubricating materials, and tribological testing technology.
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Wei, L., Duan, H., Jia, D. et al. Motor oil condition evaluation based on on-board diagnostic system. Friction 8, 95–106 (2020). https://doi.org/10.1007/s40544-018-0248-0
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DOI: https://doi.org/10.1007/s40544-018-0248-0