System and method for health determination of a machine component

• US 10,371,143 B2
• Filed: 05/10/2017
• Issued: 08/06/2019
• Est. Priority Date: 06/18/2014
• Status: Active Grant

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Billing, Andrew W., Wheeler, Brian G., Campagna, Michael J., Heffron, Dereck G.
• Primary Examiner(s): Simmons, Jennifer E
• Application Number:
  US15/591,990
• Publication Number:
  US 20170241414A1
• Time in Patent Office: 818 Days
• CPC Class Codes: F02M 59/44 Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
• CPC Class Codes: F04B 2203/0209 Rotational speed
• CPC Class Codes: F04B 2205/05 Pressure after the pump outlet
• CPC Class Codes: F04B 2205/11 Outlet temperature
• CPC Class Codes: F04B 2207/70 Warnings
• CPC Class Codes: F04B 49/10 Other safety measures
• CPC Class Codes: F04B 51/00 Testing machines, pumps, or pumping installations
• CPC Class Codes: G05B 23/0232 based on qualitative trend analysis, e.g. system evolution

Abstract

A system for determining health of a component is provided. The system includes an operational parameter module associated with the component and in communication with a controller. The controller is configured to receive an operating parameter signal from the operational parameter module. The controller is configured to monitor a change of the operating parameter over a predetermined time period. The controller is configured to compare the monitored operating parameter with a first predetermined threshold. The controller is configured to determine a rate of change of the monitored operating parameter over the predetermined time period. The controller is also configured to compare the determined rate of change with a second predetermined threshold. The controller is further configured to determine the health of the component based, at least in part, on the comparisons with the first and second predetermined thresholds respectively and one or more additional parameters associated with the component.

Claims

1. A system for determining health of a fuel pump, the fuel pump having an inlet and an outlet, the system comprising:

a first temperature sensor associated with the fuel pump, the first temperature senor configured to generate first temperature signal indicative of a temperature adjacent the inlet of the fuel pump;

a second temperature sensor associated with the fuel pump, the second temperature sensor configured to generate a second temperature signal indicative of the temperature adjacent the outlet of the fuel pump; and

a controller in communication with the first and second temperature sensors, the controller configured to

receive the first temperature signal from the first temperature sensor;

receive the second temperature signal from the second temperature sensor;

monitor a difference in the temperature between the first and second temperature sensors over a predetermined time period;

compare the difference in the temperature to with a first predetermined threshold;

determine a rate of change of the difference in the temperature over the predetermined time period;

compare the determined rate of change of the difference in the temperature with a second predetermined threshold;

determine the health of the fuel pump based, at least in part, on the comparisons with the first and second predetermined thresholds respectively and one or more additional parameters associated with the fuel pump; and

generate a notification indicative of the determined health of the fuel pump.

2. The system of claim 1, wherein the controller is further configured to determine a failure of the fuel pump based on exceeding the first and second predetermined thresholds respectively.

3. The system of claim 1 further comprising:

an output device communicably coupled to the controller.

4. The system of claim 3, wherein the output device includes at least one of a monitor, a screen, a display panel and a speaker.

5. The system of claim 1, wherein the one or more additional parameters include at least one of a level of fuel in a tank, an ambient temperature and a type of fuel.

6. A method for determining health of a fuel pump, the fuel pump having an inlet and an outlet, the method comprising:

receiving a first temperature signal from a first temperature sensor indicative of a temperature adjacent the inlet of the fuel pump;

receiving a second temperature signal from a second temperature sensor indicative of a temperature adjacent the outlet of the fuel pump;

monitoring a difference in the temperature between the first and second temperature sensors over a predetermined time period;

comparing the difference in temperature with a first predetermined threshold;

determining a rate of change of the difference in temperature over the predetermined time period;

comparing the determined rate of change in the difference in temperature with a second predetermined threshold;

determining the health of the fuel pump based, at least in part, on the comparisons with the first and second predetermined thresholds respectively and one or more additional parameters associated with the fuel pump; and

generating a notification indicative of the determined health of the fuel pump.

7. The method of claim 6, wherein the one or more additional parameters include at least one of a level of fuel in a tank, an ambient temperature and a type of fuel.

8. The method of claim 6, wherein determining the health of the fuel pump further comprises:

determining a failure of the fuel pump based on exceeding the first and second predetermined thresholds respectively.

9. The method of claim 6, wherein receiving the operating parameter signal further comprises:

receiving a first operating parameter signal indicative of an operating parameter of an inlet of the fuel pump; and

receiving a second operating parameter signal indicative of an operating parameter of an outlet of the fuel pump.

10. A monitoring and notification system for a fuel pump, the system comprising:

a first sensor associated with the fuel pump configured to generate first signals indicative of an inlet temperature of the fuel pump;

a second sensor associated with the fuel pump configured to generate second signals indicative of an outlet temperature of the fuel pump, and

a controller in communication with the first sensor and the second sensor, the controller configured to;

access a first temperature difference threshold;

access a second temperature difference threshold;

receive the first signals from the first sensor;

receive the second signals from the second sensor;

determine a first temperature difference between the first sensor and the second sensor based upon the first signals and the second signals over a first predetermined time period;

compare the first temperature difference with the first temperature difference threshold;

upon the first temperature difference exceeding the first temperature difference threshold,

determine a temperature difference characteristic of the first temperature difference based upon the first signals and the second signals over a second predetermined time period;

compare the temperature difference characteristic with the second temperature difference threshold; and

generate an alert signal when the second average temperature difference characteristic exceeds the second temperature difference threshold.

11. The monitoring and notification system of claim 10, wherein the first temperature difference is a daily average temperature difference between the inlet temperature and the outlet temperature.

12. The monitoring and notification system of claim 10, wherein the second temperature difference characteristic is a plurality of consecutive days of increasing daily average temperature difference between the inlet temperature and the outlet temperature.

13. The monitoring and notification system of claim 10, wherein the second temperature difference characteristic is a slope of an average temperature difference between the inlet temperature and the outlet temperature.

14. The monitoring and notification system of claim 13, wherein the second predetermined time period is at least 25 days.

15. The monitoring and notification system of claim 10, wherein the temperature difference characteristic corresponds to a plurality of consecutive days of increasing daily average temperature difference between the inlet temperature and the outlet temperature and the controller is further configured to:

determine an additional temperature difference characteristic corresponding to a slope of an average temperature difference between the inlet, temperature and the outlet temperature;

access a third temperature difference threshold; and

generate an alert signal upon the first of;

the temperature difference characteristic exceeding the second temperature difference threshold; and

the additional temperature difference characteristic exceeding the third temperature difference threshold.