Combi-Sensor for Oil Level and Oil Quality Management

摘要

For modern oil management systems in vehicles we developed an innovative combi-sensor. The sensor component is capable of measuring 6 independent oil parameters (viscosity, density, permittivity, conductance, level, temperature) continuously during normal engine operation. It comprises an ultrasonic transducer for the oil level detection as well as a Tuning Fork mechanical resonator for the oil condition measurement. Both elements have been realized as small multi-chip modules, which are combined within a mechanical flange. All data is transmitted to an external ECU by a 1-wire digital interface protocol.