Optics: measuring and testing – Oil testing
Reexamination Certificate
2008-06-12
2010-11-23
Toatley, Gregory J (Department: 2877)
Optics: measuring and testing
Oil testing
Reexamination Certificate
active
07839492
ABSTRACT:
Apparatus for detecting fuel in oil includes an excitation light source in optical communication with an oil sample for exposing the oil sample to excitation light in order to excite the oil sample from a non-excited state to an excited state and a spectrally selective device in optical communication with the oil sample for detecting light emitted from the oil sample as the oil sample returns from the excited state to a non-excited state to produce spectral indicia that can be analyzed to determine the presence of fuel in the oil sample. A method of detecting fuel in oil includes the steps of exposing a oil sample to excitation light in order to excite the oil sample from a non-excited state to an excited state, as the oil sample returns from the excited state to a non-excited state, detecting light emitted from the oil sample to produce spectral indicia; and analyzing the spectral indicia to determine the presence of fuel in the oil sample.
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Jim Parks, et al., “Rapid In Situ Measurement of Fuel Dilution of Oil in a Diesel Engine using Laser-Induced Fluorescence Spectroscopy,” SAE International, Oct. 1, 2007.
Brian West, et al., Assessing Reductant Chemistry During In-Cylinder Regeneration of Diesel Lean NOx Traps, SAE International, 2004.
Jim Parks, et. al., “In Situ Measurement of Fuel Absorption into the Cylinder Wall Oil Film During Engine Cold Start,” SAE Internationa, 1998.
J.E. Parks, II, et al., “In Situ Measurement of Fuel in the Cylinder Wall Oil Film of a Combustion Engine by LIF Spectroscopy,” Applied Spectroscopy, 1998, pp. 112-118, vol. 52, No. 1.
Parks, II James E.
Partridge, Jr. William P.
Klarquist & Sparkman, LLP
Merlino Amanda H
Toatley Gregory J
UT-Battelle LLC
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