System and method for transforming data between the time domain and the combustion pulse domain

• US 8,185,359 B2
• Filed: 07/03/2008
• Issued: 05/22/2012
• Est. Priority Date: 07/03/2008
• Status: Active Grant

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Grichnik, Anthony J., Felty, Timothy J., Mason, James R., Jayachandran, Amit, Kesse, Mary Lou, Wynkoop, Christopher L.
• Primary Examiner(s): Le, John H
• Application Number:
  US12/216,405
• Publication Number:
  US 20100004901A1
• Time in Patent Office: 1,419 Days
• Field of Search: 702/32, 702/33, 702/104, 702/105, 702/113, 702/125, 702/126, 702/189, 702/198, 702/145, 73/233.1, 731/14, 731/143.2, 735/93, 736/60, 324/173, 340/870.2, 701/108, 701/111, 701/114, 123/406.53, 123/488, 700/30
• US Class Current: 702/198
• CPC Class Codes: G01M 15/02 Details or accessories of testing apparatus

Abstract

A method for transforming machine sensor data between a time domain and a combustion pulse domain is disclosed. The method may include determining a number of pulse events per rotation of a shaft and determining a sampling rate per pulse event. The method may also include sampling one or more sensors at the sampling rate per pulse event. The method also may include transforming the samples into the combustion pulse domain.

Claims

1. A method for transforming machine sensor data between a time domain and an engine combustion pulse domain, comprising:

determining a number of engine combustion pulse events in an engine per rotation of an element associated with the engine;

determining a sampling rate per engine combustion pulse event;

sampling one or more sensors at the sampling rate per engine combustion pulse event; and

transforming, by at least one computer processor, the samples from the time domain into the engine combustion pulse domain.

2. The method according to claim 1, further including modeling a process in the engine combustion pulse domain based on the samples transformed into the engine combustion pulse domain.

3. The method according to claim 2, further including:

transforming an output of the modeled process into the time domain; and

providing the transformed output to a controller.

4. The method according to claim 3, wherein transforming the output of the modeled process into the time domain includes adjusting the output in the time domain to account for a speed at which airborne emissions travel through an exhaust system, based on the number of engine combustion pulse events per rotation of the element.

5. The method according to claim 2, wherein modeling the process includes producing an output that includes virtual sensor data.

6. The method according to claim 5, wherein the virtual sensor data include virtual sensor data on airborne emissions of the engine.

7. The method according to claim 1, wherein a sampling rate is at least ten samples per engine combustion pulse event.

8. A system for a machine including an engine with a rotary element, the system configured to transform machine sensor data between a time domain and an engine combustion pulse domain, comprising:

a sensor deployed on the machine;

an input interface configured to obtain data from the sensor deployed on the machine;

an output interface configured to provide data to a control system; and

a controller configured to;

determine a number of engine combustion pulse events in the engine per rotation of the rotary element;

determine a sampling rate per engine combustion pulse event;

sample the sensor at the sampling rate per engine combustion pulse event; and

transform the samples from the time domain into the engine combustion pulse domain by determining positions of the samples within the engine combustion pulse events.

9. The system according to claim 8, wherein the controller is further configured to model a process in the engine combustion pulse domain based on the samples transformed into the engine combustion pulse domain.

10. The system according to claim 9, wherein the controller is further configured to:

transform an output of the modeled process into the time domain; and

provide the transformed output to the controller.

11. The system according to claim 10, wherein the controller is further configured to adjust the output in the time domain to account for a speed at which airborne emissions travel through an exhaust system, based on the number of engine combustion pulse events per rotation of the rotary element.

12. The system according to claim 9, wherein an output of the modeled process includes virtual sensor data.

13. The system according to claim 12, wherein the virtual sensor data include virtual sensor data on airborne emissions of the engine.

14. The system according to claim 8, wherein a sampling rate is at least ten samples per pulse event.

15. A machine, comprising:

an engine with a rotating element configured to provide power for the machine;

an engine electronic control module (ECM) configured to control the engine;

a plurality of physical sensors configured to provide sensing data to the engine ECM;

an input interface configured to obtain data from the plurality of physical sensors deployed on the machine;

an output interface configured to provide data to a control system; and

a controller associated with the ECM and being configured to;

determine a number of engine combustion pulse events in the engine per rotation of the rotating element;

determine a sampling rate per engine combustion pulse event;

sample one or more of the physical sensors at the sampling rate per engine combustion pulse event;

transform the samples from a time domain into an engine combustion pulse domain by determining positions of the samples within the engine combustion pulse events; and

provide the transformed samples as input to a virtual sensor model.

16. The machine according to claim 15, wherein the controller is further configured to:

transform an output of the virtual sensor model into the time domain; and

provide transformed output to the ECM.

17. The machine according to claim 16, wherein the controller is further configured to adjust the output in the time domain to account for a speed at which airborne emissions travels through an exhaust system, based on the number of pulse events per rotation of the rotating element.

18. The machine according to claim 15, wherein the output of the virtual sensor model includes virtual sensor data on airborne emissions in an internal combustion engine.

19. The machine according to claim 15, wherein a sampling rate per pulse event includes at least ten samples per pulse event.