Calibration systems and methods for model predictive controllers

• US 9,797,318 B2
• Filed: 09/20/2013
• Issued: 10/24/2017
• Est. Priority Date: 08/02/2013
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Storch, Sharon L., Shore, James A., Wong, Kevin C., Jin, Ning
• Primary Examiner(s): HAMAOUI, DAVID E
• Application Number:
  US14/032,508
• Publication Number:
  US 20150039206A1
• Time in Patent Office: 1,495 Days
• CPC Class Codes: F02D 11/10 of the electric type
• CPC Class Codes: F02D 13/0219 by shifting the phase, i.e. the opening periods of the valves are constant
• CPC Class Codes: F02D 2041/1412 using a predictive controller
• CPC Class Codes: F02D 2041/1433 using a model or simulation of the system
• CPC Class Codes: F02D 28/00 Programme-control of engines
• CPC Class Codes: F02D 41/1402 Adaptive control
• CPC Class Codes: F02D 41/2464 Characteristics of actuators
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

A tangible computer readable medium of a vehicle includes object code referencing a plurality of variables, the object code for: identifying sets of possible target values based on air and exhaust setpoints for an engine; generating predicted parameters based on a model of the engine and the sets of possible target values, respectively; selecting one of the sets of possible target values based on the predicted parameters; setting target values based on the selected one of the sets of possible target values, respectively; and controlling opening of a throttle valve based on a first one of the target values. The tangible computer readable medium also includes calibration data stored separately and that includes predetermined values for the variables referenced in the object code, respectively. At least one processor executes the object code using the predetermined values to perform the identifying, the generating, the selecting, the setting, and the controlling.

Claims

1. A system, comprising:

an engine control module (ECM) of a vehicle, comprising;

a tangible computer readable medium including;

object code referencing a plurality of variables stored in a calibration data file, the object code for;

identifying sets of possible target values based on air and exhaust setpoints for an engine;

generating predicted parameters based on a model of the engine and the sets of possible target values, respectively;

selecting one of the sets of possible target values based on the predicted parameters;

setting target values based on the selected one of the sets of possible target values, respectively; and

controlling opening of a throttle valve based on a first one of the target values; and

the calibration data file, wherein the calibration data file is stored separately from the object code and includes the predetermined values for the variables referenced in the object code, respectively; and

at least one processor that executes the object code using the predetermined values to perform the identifying, the generating, the selecting, the setting, and the controlling; and

a model predictive control (MPC) design device that generates a source code file and a header file based on user input, the header file including the predetermined values for the variables referenced in the object code, that identifies the predetermined values within the header file, that generates the calibration data file that includes the predetermined values from the header file, that compiles the source code file and the header file to produce the object code, that stores the object code in the tangible computer readable medium of the ECM, and that stores the calibration data file in the tangible computer readable medium of the ECM separately from the object code.

2. The system of claim 1 wherein the tangible computer readable medium further includes:

data indicative of a first identifier of the object code; and

data indicative of a second identifier of the calibration data file.

3. The system of claim 1 further comprising:

a calibration device that is separate from the ECM and the MPC design device, that includes a display, and that displays the predetermined values for the variables referenced in the object code on the display.

4. The system of claim 3 wherein the calibration device further:

includes a second calibration data file including a second set of predetermined values for the variables referenced in the object code; and

replaces the calibration data file with the second calibration data file in response to user input.

5. The system of claim 4 wherein:

the tangible computer readable medium further includes;

data indicative of a first identifier of the object code; and

data indicative of a second identifier of the calibration data file; and

the calibration device further replaces the data indicative of the second identifier with data indicative of a third identifier of the second calibration data file after replacing the calibration data file with the second calibration data file.

6. The system of claim 1 wherein the object code further includes object code for:

controlling opening of a wastegate based on a second one of the target values;

controlling opening of an exhaust gas recirculation (EGR) valve based on a third one of the target values; and

controlling intake and exhaust valve phasing based on fourth and fifth ones of the target values, respectively.

7. The system of claim 1 wherein the object code further includes object code for selecting the one of the sets of possible target values further based on the air and exhaust setpoints.

8. The system of claim 7 wherein the object code further includes object code for selecting the one of the sets of possible target values based on comparisons of the air and exhaust setpoints with the predicted parameters, respectively.

9. A method comprising:

using at least one processor of a vehicle, selectively executing object code using a calibration data file that is stored separately from the object code in a tangible computer readable medium of the vehicle,

wherein the calibration data file includes predetermined values for variables referenced in the object code, respectively; and

the object code includes object code for;

identifying sets of possible target values based on air and exhaust setpoints for an engine;

generating predicted parameters based on a model of the engine and the sets of possible target values, respectively;

selecting one of the sets of possible target values based on the predicted parameters;

setting target values based on the selected one of the sets of possible target values, respectively; and

controlling opening of a throttle valve based on a first one of the target values; and

using model predictive control (MPC) design device that is separate from the vehicle and the at least one processor;

generating a source code file and a header file based on user input, the header file including the predetermined values for the variables referenced in the object code;

identifying the predetermined values within the header file;

generating the calibration data file that includes the predetermined values from the header file;

compiling the source code file and the header file to produce the object code;

storing the object code in the tangible computer readable medium; and

storing the calibration data file in the tangible computer readable medium, separately from the object code.

10. The method of claim 9 wherein the tangible computer readable medium further includes:

data indicative of a first identifier of the object code; and

data indicative of a second identifier of the calibration data file.

11. The method of claim 9 further comprising:

using a calibration device that is separate from the vehicle and the MPC design device, displaying the predetermined values for the variables referenced in the object code on a display of the calibration device.

12. The method of claim 11 further comprising:

using the calibration device, replacing the calibration data file with a second set of calibration data file in response to user input,

wherein the second calibration data file includes a second set of predetermined values for the variables referenced in the object code.

13. The method of claim 12 wherein:

the tangible computer readable medium further includes;

data indicative of a first identifier of the object code; and

data indicative of a second identifier of the calibration data file; and

the method further comprises;

using the calibration device, further replacing the data indicative of the second identifier with data indicative of a third identifier of the second calibration data file after replacing the calibration data file with the second sot of calibration data file.

14. The method of claim 9 wherein the object code further includes object code for:

controlling opening of a wastegate based on a second one of the target values;

controlling opening of an exhaust gas recirculation (EGR) valve based on a third one of the target values; and

controlling intake and exhaust valve phasing based on fourth and fifth ones of the target values, respectively.

15. The method of claim 9 wherein the object code further includes object code for selecting the one of the sets of possible target values further based on the air and exhaust setpoints.

16. The method of claim 15 wherein the object code further includes object code for selecting the one of the sets of possible target values based on comparisons of the air and exhaust setpoints with the predicted parameters, respectively.