Detection of fuel contamination in lubricating oil
First Claim
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1. A method for measuring oil quality, the method comprising:
- measuring a first set of properties of the oil;
measuring a second set of properties of the oil, wherein the second set of properties of the oil includes the same properties as the first set of properties of the oil plus at least one additional property of the oil not contained in the measurements of the first set of properties of the oil;
performing a differential analysis comparing the measured first set of properties relative to the measured second set of properties of the oil; and
displaying an indication of oil quality on a human readable display, wherein the one or more first set of properties of the oil or the one or more second set of properties of the oil are measured using a sensing element having one or more beads within a chamber.
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Abstract
A method for measuring fuel contamination in oil that uses a material in contact with oil whereby fuel intrusion into the oil will change the electrical, mechanical, and/or chemical properties of the material as compared to the same electrical, mechanical, and/or chemical properties of the material when in contact only with mineral or synthetic oil only.
71 Citations
18 Claims
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1. A method for measuring oil quality, the method comprising:
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measuring a first set of properties of the oil; measuring a second set of properties of the oil, wherein the second set of properties of the oil includes the same properties as the first set of properties of the oil plus at least one additional property of the oil not contained in the measurements of the first set of properties of the oil; performing a differential analysis comparing the measured first set of properties relative to the measured second set of properties of the oil; and displaying an indication of oil quality on a human readable display, wherein the one or more first set of properties of the oil or the one or more second set of properties of the oil are measured using a sensing element having one or more beads within a chamber. - View Dependent Claims (2, 3, 4, 5)
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6. A method for measuring oil quality, the method comprising:
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measuring one or more properties of the oil; filtering a portion of the oil with a fine filter; measuring the one or more properties of the finely filtered portion of oil; performing a differential analysis comparing the measured the one or more properties of the oil relative to the measured the one or more properties of the finely filtered portion of oil; and displaying an indication of oil quality on a human readable display, wherein the one or more properties of the oil are measured using a sensing element having one or more beads within a chamber. - View Dependent Claims (7, 8, 9)
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10. A method for measuring oil quality, the method comprising:
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measuring one or more properties of the oil with a first set of one or more sensors sensitive to a particular contaminate; measuring the one or more properties of the oil with a second set of one or more sensors, wherein the second set of one or more sensors is less sensitive to the particular contaminate than the first set of one or more sensors; and performing a differential analysis comparing the measured the one or more properties of the oil measured by the first set of one or more sensors relative to the one or more properties of the oil measured by the second set of one or more sensors; and displaying an indication of oil quality on a human readable display. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method for measuring fuel contamination in oil, the method comprising:
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measuring an electrical, mechanical, or chemical property of a material in contact with oil; comparing the measured property of the material in contact with the oil against a previously measured electrical, mechanical, or chemical property of the same material; and identifying a change in the measured electrical, mechanical, or chemical property against the previously measured electrical, mechanical, or chemical property, wherein the change indicates fuel intrusion into and contamination of the oil, wherein measuring the property of the material includes measuring the property of the material inside a sensing element, wherein the property of the material includes soot contamination. - View Dependent Claims (17, 18)
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Specification