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Study of Base Number Estimation Method for Engine Oil Deterioration Monitoring System
Published May 23, 2007 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Spring Conference
In this research project, technology for estimating the base number (BN) deterioration, used as an index for judging engine oil deterioration, was developed. A detailed investigation using a NOx bubbling unit was carried out, and as a result it was found that the speed at which the BN falls. In addition, a detailed analysis was carried out, and it was found that the reduction speed can be expressed using the differential rate law. The results of this study showed that it was possible to adequately estimate the BN. This indicated that it is possible to estimate the reduction of the BN onboard by the engine control unit.