System and method for determining a performance characteristic of a vehicle component based upon temperature, load, road grade and time

• US 6,230,554 B1
• Filed: 01/06/1999
• Issued: 05/15/2001
• Est. Priority Date: 01/06/1999
• Status: Expired due to Fees

• Current Assignee: ZF Meritor LLC (Cummins Incorporated)
• Original Assignee: Meritor Heavy Vehicle Systems, LLC (Meritor, Inc. (Nevada))
• Inventors: Kramer, Dennis A.
• Primary Examiner(s): DOMBROSKE, GEORGE M
• Application Number:
  US09/226,590
• Time in Patent Office: 860 Days
• Field of Search: 731/16, 731/172, 731/173, 731/181, 701/29, 701/35, 701/101, 701/103
• US Class Current: 73/114.01
• CPC Class Codes: F02D 41/045 Detection of accelerating or decelerating state detection thereof in general G01P
• CPC Class Codes: F02D 41/2425 Particular ways of programming the data
• CPC Class Codes: G07C 5/004 Indicating the operating range of the engine economical driving B60R16/0236, F02B77/084; measuring liquid fuel of an engine G01F9/00

Abstract

A method and system for determining the performance characteristics of at least one selected vehicle component utilizes a plurality of variables and takes into account the interrelationship of those vehicles. Specifically, a detected temperature, load and road grade condition are utilized to determine a rate of change in a performance characteristic of a selected component relative to time. The rate of change information is provided to a vehicle operator on a real-time basis and stored in memory for later use by a service technician. Determining a performance characteristic based on a plurality of variables and storing information regarding that characteristic over time provides additional useful information to a service technician enabling the technician to more quickly and effectively diagnose potential problems with the vehicle components.

Claims

1. A system for monitoring the performance of a selected vehicle component taking into account a plurality of variables, comprising:

a first sensor supported on the vehicle that detects a temperature of the selected vehicle component;

a second sensor supported on the vehicle that detects a load supported by the vehicle;

a third sensor that detects a grade of a road surface along which the vehicle is travelling; and

an electronic controller that communicates with each of the first, second and third sensors and determines a performance characteristic of the selected vehicle component based upon the detected temperature, load, and road surface grade and determines a rate of change of the characteristic relative to time and provides an output indicative of the rate of change.

2. The system of claim 1, further comprising a display positioned within the vehicle and wherein the electronic controller causes the display to provide a visible indication of the performance characteristic and the rate of change for an operator of the vehicle.

3. The system of claim 2, further comprising a communication port coupled to the electronic controller and wherein the electronic controller includes a memory module that stores data regarding the performance characteristic and the rate of change relative to time and wherein the electronic controller communicates the data from the memory module to an external computer device through the communication port.

4. The system of claim 1, wherein the third sensor comprises an analog tilt sensor supported on the vehicle.

5. The system of claim 1, wherein the third sensor comprises a global positioning device that communicates with a database which includes information regarding road surface elevations at various locations and the system utilizes a current vehicle location and information from the database to determine the road grade.

6. The system of claim 1, wherein the electronic controller determines a rate of change of the temperature of the selected vehicle component and determines if the rate of change is outside of an expected range and wherein the expected range is determined by the electronic controller dependent on the detected load and road grade.

7. The system of claim 1, wherein the second sensor comprises an axle load sensor that detects a load supported near an axle on the vehicle based upon an amount of pressure within a suspension device associated with the axle.

8. The system of claim 1, wherein the electronic controller utilizes a combination of the detected temperature, load, and road surface grade information when determining the rate of change of the performance characteristic relative to time.

9. The system of claim 1 wherein the electronic controller determines if the rate of change of the performance characteristic is outside of an expected range and wherein the expected range is determined dependent on at least two of the detected temperature, load and road grade.

10. A method of monitoring the performance of a selected vehicle component taking into account a plurality of variables, comprising the steps of:

(A) detecting a temperature of the selected component;

(B) detecting a load supported by the vehicle;

(C) detecting a road grade at a current vehicle location;

(D) determining a performance characteristic of the selected component utilizing the detected temperature, load and road grade at the current vehicle location; and

(E) determining a rate of change of the performance characteristic relative to time.

11. The method of claim 10, further comprising storing data regarding the performance characteristic and the rate of change over time.

12. The method of claim 10, further comprising providing a visual display to a driver indicative of the performance characteristic and the rate of change on a real time basis.

13. The method of claim 10, wherein step (D) is performed using an analog tilt sensor supported on a vehicle.

14. The method of claim 10, wherein step (D) is performed by determining a location of the vehicle using a global positioning device and accessing a global positioning database that includes road elevation information and determining the road grade at the current vehicle location from the database information.

15. The method of claim 10 wherein step (d) includes using a combination of the detected temperature, load and road grade.

16. The method of claim 10 including determining an expected range based upon at least two of the detected temperature, load and road grade, and determining if the rate of change of the performance characteristic is outside of the expected range.

17. The method of claim 10 including determining a rate of change of the temperature of the selected vehicle component and determining if the rate of change is outside of an expected range.

18. The method of claim 17 including determining the expected range based upon the detected load and road grade.