Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Reexamination Certificate
2005-06-28
2005-06-28
Le, N. (Department: 2858)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
C327S439000, C327S441000, C327S603000, C073S053050, C702S050000
Reexamination Certificate
active
06911830
ABSTRACT:
A method by which contaminant (soot) content in Diesel engine oil is determined using electrical conductivity measurements of the Diesel oil at a high frequency, or by which contaminant (soot and/or water and/or anitfreeze) content is determined using the ratio of electrical conductivity measurements of the Diesel oil at a high frequency to the electrical conductivity measurements of the Diesel oil at a low frequency. Both the conductivity ratio and the high frequency conductivity are essentially independent of the brand of oil. High frequency is defined to be above 2 MHz whereas low frequency is defined to be D.C. to about 1 kHz.
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Heremans Joseph Pierre
Nagy Louis L.
Schroeder Thaddeus
Wang Su-Chee Simon
Delphi Technologies Inc.
Funke Jimmy L.
Le N.
Nguyen Vincent Q
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