Development of a Coil-typed Oil Senor System for the Automobile Engine Oil on the Dielectric Constant

摘要

This paper is aimed to design the circuit of a coil-type oil sensor monitoring the deterioration in the driving condition and develops the device packaged to the automotive engine oil, which let a driver notify the optimized time for the exchange of engine oil. By applying the principle, which the deterioration of automotive engine oil can be expressed to the dielectric constant, the capacitance bridge circuit and the integrator circuit are designed and packaged to coil-typed engine oil. In this study, the range of operating temperature of engine oil is experimentally recommended within 55°C for the stability of a sensor designed. It is concluded that the characteristics of output voltage converted from the dielectric constant are linearly Distribute.