Oil monitoring system

• US 7,928,741 B2
• Filed: 04/20/2009
• Issued: 04/19/2011
• Est. Priority Date: 02/17/2006
• Status: Expired due to Fees

• Current Assignee: Voelker Sensors, Inc
• Original Assignee: Voelker Senors Incorporated
• Inventors: Hedges, Joe D., Voelker, Paul J.
• Primary Examiner(s): NATALINI, JEFF WILLIAM
• Application Number:
  US12/426,956
• Publication Number:
  US 20090201036A1
• Time in Patent Office: 729 Days
• Field of Search: None
• US Class Current: 324/698
• CPC Class Codes: G01N 33/2888 Lubricating oil characteristics, e.g. deterioration lubricating properties G01N33/30

Abstract

An embodiment of the present invention provides for a sensing element comprising a non-conductive housing with three chambers for detecting oil conductivity, additive depletion and oxidation, and water contamination, respectively. Through the monitoring of an array of oil sensors, an early warning of oil degradation due to oxidation is provided. The monitoring system further detects excess soot, water and other contaminants in the oil. The oil sensor array and related monitoring system decrease the likelihood of catastrophic engine failure through the early detection and warning of a decrease in oil quality thereby reducing vehicle owner outlays for servicing and disposal fees while further aiding in the satisfaction of environmental protection regulations.

Claims

1. An oil quality monitoring system, comprising:

a sensing element that generates oil measurement data associated with oil quality of a monitored oil sample, the sensing element comprising;

a housing, and

a plurality of chambers within the housing, the plurality of chambers including a first chamber and a second chamber, the first chamber including a first bead that responds to a first property of the monitored oil sample, the second chamber including a second bead that responds to a second property of the monitored oil sample; and

a monitoring device coupled to the sensing element, the monitoring device comprising an application specific integrated circuit that differentially analyzes the oil measurement data from the plurality of chambers, and wherein the oil monitoring device displays an indicia of oil quality of the monitored oil sample in a user interface based on the differential analysis of the oil measurement data, the differential analysis including comparing a difference between oil measurement data from the first and second chambers.

2. The oil quality monitoring system of claim 1, wherein the first bead includes an ionically charged group.

3. The oil quality monitoring system of claim 1, wherein the first bead responds to a concentration of water, a concentration of soot, a pH, or a concentration of an additive package in the monitored oil sample.

4. The oil quality monitoring system of claim 1, wherein the plurality of chambers includes a third chamber containing a third bead, and the differential analysis includes comparing a difference between oil measurement data from two of the first, second, or third chambers.

5. The oil quality monitoring system of claim 1, wherein the first property is associated with any of a concentration of water, a concentration of soot, a pH, or a concentration of an additive package in the monitored oil sample, and the second property is associated with any other of the concentration of water, concentration of soot, pH, or concentration of the additive package in the monitored oil sample.

6. The oil quality monitoring system of claim 1, wherein the first chamber includes only the first bead, and the second chamber includes a plurality of beads.

7. The oil quality monitoring system of claim 1, wherein the oil measurement data include conductivities within at least two chambers of the plurality of chambers.

8. The oil quality monitoring system of claim 1, further comprising a thermistor coupled to the monitoring device, the thermistor disposed to measure oil temperature.

9. The oil quality monitoring system of claim 1, wherein at least one chamber from the plurality of chambers is covered by a filter that prevents suspended particles from passing into the covered chamber.

10. An oil quality monitoring system, comprising:

an array of sensing elements that generate oil measurement data

associated with oil quality of a monitored oil sample, each of the sensing

elements in the array of sensing elements comprising;

a housing, and

a plurality of chambers within the housing; and

a monitoring device coupled to the array of sensing elements, the monitoring device comprising a software module stored in memory and executable by a processor to differentially analyze the oil measurement data generated by the array of sensing elements and wherein the oil monitoring device displays an indicia of oil quality of the monitored oil sample in a user interface based on the differential analysis of the oil measurement data.

11. The oil quality monitoring system of claim 10, wherein the oil measurement data is batched and collectively analyzed by the monitoring device.

12. The oil quality monitoring system of claim 10, wherein the oil measurement data is serially analyzed by the monitoring device.

13. The oil quality monitoring system of claim 10, wherein portions of the oil measurement data are analyzed in parallel by the monitoring device.

14. The oil quality monitoring system of claim 10, wherein the oil measurement data are from at least two chambers of the plurality of chambers in each of at least two sensing elements in the array of sensing elements.