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Oil-Quality Prediction and Oil-Level Detection with the TEMIC QLT-Sensor Leads to Variable Maintenance Intervals
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Abstract
The Quality-Level-Temperature-Sensor (QLT-Sensor) provides the dielectric number, level and temperature of fluids used in passenger car engines e.g. engine oils. The diellectric number can be used to indicate changes in oil-quality. Level detection can be used to determine oil corrsumption, minimum oil level or critical overfilling. The oil-temperature can be used in combination with the dielectric number for precisely predicting the oil drain time. The design-principles and functions including compensation of aging and temperature effects are described. It is shown, what engine constructors and developers must consider when regarding mechanical and electrical interfaces.
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Irion, E., Land, K., Gürtler, T., and Klein, M., "Oil-Quality Prediction and Oil-Level Detection with the TEMIC QLT-Sensor Leads to Variable Maintenance Intervals," SAE Technical Paper 970847, 1997, https://doi.org/10.4271/970847.Also In
References
- Thom R. Kollmann K. Warneke W. Frend M. „Extended Oil Drain Intervals: Conservation of Resources or Reduction of Engine Life” SAE Technical Paper Series No. 951035 1995
- Saloka G. S. Meitzler A. H. „A Capacitive Oil Deterioration Sensor” SAE Technical Paper Series No. 910497 1991
- Beyer T. 1996