Oxidation stability measurement for oil condition management
First Claim
1. A sensor apparatus, comprising:
- a testing chamber configured to receive a sample of oil to be tested;
a first embedded heater coupled to the testing chamber and configured to supply heat to the sample;
an oxygen flux chamber coupled to the testing chamber and configured to provide a substantially stable oxygen flux to the testing chamber; and
a control module coupled to the testing chamber, the first embedded heater, and the oxygen flux chamber, and configured to;
monitor the temperature of the sample;
direct the first embedded heater to supply heat to the sample;
direct the oxygen flux chamber to provide oxygen flux to the testing chamber;
measure an oxygen induction time (OIT); and
evaluate the oxidation stability of the sample based on the OIT.
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Accused Products
Abstract
A sensor apparatus is disclosed that includes a testing chamber or testing chamber arrays configured to receive a sample of oil to be tested. A first embedded heater is coupled to the testing chamber or testing chamber arrays and configured to supply heat to the sample. An oxygen flux chamber is coupled to the testing chamber or testing chamber arrays and configured to provide a substantially stable oxygen flux to the testing chamber. A control module is coupled to the testing chamber, the first embedded heater, and the oxygen flux chamber. The control module is configured to monitor the temperature of the sample, direct the first embedded heater to supply heat to the sample, direct the oxygen flux chamber to provide oxygen flux to the testing chamber, measure an oxygen induction time (OIT), and evaluate the oxidation stability of the sample based on the OIT. A method for thermal analysis of oil oxidation stability is also disclosed.
21 Citations
20 Claims
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1. A sensor apparatus, comprising:
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a testing chamber configured to receive a sample of oil to be tested; a first embedded heater coupled to the testing chamber and configured to supply heat to the sample; an oxygen flux chamber coupled to the testing chamber and configured to provide a substantially stable oxygen flux to the testing chamber; and a control module coupled to the testing chamber, the first embedded heater, and the oxygen flux chamber, and configured to; monitor the temperature of the sample; direct the first embedded heater to supply heat to the sample; direct the oxygen flux chamber to provide oxygen flux to the testing chamber; measure an oxygen induction time (OIT); and evaluate the oxidation stability of the sample based on the OIT. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for thermal analysis of oil oxidation stability, comprising:
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providing a sample of oil to be tested to a testing chamber heating the sample, by a first embedded heater, to a first temperature; maintaining the output of the first embedded heater at a level sufficient to maintain the sample at the first temperature; providing stable oxygen flux into the testing chamber beginning at a first time; measuring a temperature increase of the sample; upon a determination that the sample is at a second temperature, calculating an oxidation induction time (OIT) based on the time elapsed between the first time and the time the sample is determined to be at the second temperature; and determining the oil oxidation stability based on the OIT. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A system, comprising:
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a testing chamber configured to receive a sample of oil to be tested; a first embedded microheater coupled to the testing chamber and configured to supply heat to the sample to maintain the first sample at a predetermined first temperature; an oxygen flux chamber coupled to the testing chamber and configured to supply a substantially stable oxygen flux to the testing chamber, comprising a second embedded microheater and oxygen releasing reagents; and a control module coupled to the testing chamber and the oxygen flux chamber and configured to measure the temperature of the sample, to mark a first time at a beginning of stable oxygen flux from the oxygen flux chamber to the testing chamber, to mark a second time at a determination that the sample is at a predetermine second temperature, and to measure an oxygen induction time (OIT) based on the first time and the second time. - View Dependent Claims (20)
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Specification