Calibration of engine control systems

• US 20070156363A1
• Filed: 12/29/2005
• Published: 07/05/2007
• Est. Priority Date: 12/29/2005
• Status: Active Grant

• Current Assignee: Garrett Transportation I Inc. (Garrett Motion, Inc.)
• Original Assignee: Honeywell International Inc.
• Inventors: Shahed, Syed, Kolavennu, Soumitri, Stewart, Gregory
• Granted Patent: US 7,415,389 B2
• Time in Patent Office: Days
• US Class Current: 702/113
• CPC Class Codes: G05B 11/42 for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.

Abstract

A system for automatic multivariable calibration of an engine controller. The system may take inputs which include actuator setpoints, sensor measurements, performance requirements, and so forth. There may be an algorithm to compute engine calibration parameters for the controller. Each of the actuators may be separately stepped through to experimentally obtain actuator input and sensor output data. Algorithmic processing of the experimentally obtained data may be performed to calculate parameters of a model of an engine. A model based control design algorithm may then be invoked to obtain the calibration parameters for a controller. The calibrated controller may be tested with real or simulated engine conditions. The performance related to the parameters may be analyzed and determination of the acceptability of the data be made. If not acceptable, the parameters may be reprocessed. If acceptable, the calibration parameters may be downloaded to the engine controller for application and use.

Claims

1. A calibration system comprising:

a calibration data storage module;

a control algorithm module;

at least one actuator connected to the control algorithm; and

at least one sensor connected to the algorithm module.

2. The system of claim 1, wherein:

the control algorithm module comprises a PID algorithm; and

the calibration data storage module comprises parameters K_c, K₁, K_d, and the like.

3. The system of claim 2, wherein the control algorithm mode comprises a model predictive control algorithm.

4. The system of claim 1, wherein:

a first actuator of the at least one actuator is a variable nozzle turbocharger actuator; and

a first sensor of the at least one sensor is a manifold absolute pressure sensor.

5. A calibration data design system comprising:

a model determination module;

an application trial module connected to the model determination module; and

a performance analyzer connected to the module application.

6. The system of claim 5, further comprising a requirements satisfaction indicator connected to the performance analyzer.

7. The system of claim 6, wherein the model determination module comprises:

an experiment stage;

a model identification stage connected to the experiment stage; and

a model based control design stage connected to the model identification stage and to the application module.

8. The system of claim 7, wherein the application module comprises an engine trial module connected to the performance analyzer.

9. The system of claim 7, wherein the application module comprises:

a simulation module connected to the model based control design stage; and

an engine trial module connected to the simulation module and to the performance analyzer.

10. The system of claim 9, wherein the requirements satisfaction indicator sends a start signal to the model determination module if the requirements are not satisfied, or if the requirements are satisfied, then the calibration parameters are downloaded to an engine control unit.

11. The system of claim 10, wherein the experiment module steps through each actuator of a multivariable controller.

12. A calibration system comprising:

a calibration computer;

a plurality of actuators connected to the calibration computer;

a sensor connected to the calibration computer; and

wherein the calibration computer comprises;

a model determination unit; and

an application module connected to the model determination unit.

13. The system of claim 12, wherein the model determination unit comprises an experiment module.

14. The system of claim 13, wherein the experiment module steps through at least one actuator of the plurality actuators to determine calibration parameters.

15. The system of claim 14, wherein the model determination unit outputs the calibration parameters to the application module for testing.

16. The system of claim 15, further comprising:

an evaluation module connected to the application module; and

wherein the evaluation module determines whether the calibration parameters are satisfactory.

17. The system of claim 16, wherein:

if the calibration parameters are not satisfactory, then the parameters are returned to the model determination unit for adjustment; and

if the calibration parameters are satisfactory, then the parameters are downloaded to an engine control unit.

18. The system of claim 17, wherein:

the engine control unit comprises a control algorithm module and is connected to the evaluation module; and

wherein upon a downloading of the calibration parameters, the plurality of actuators are connected to the control algorithm module.

19. The system of claim 18, further comprising a plurality of sensors connected to the control algorithm module.

20. The system of claim 19, wherein:

the evaluation module comprises a closed-loop simulator and/or an engine trial module; and

the actuators are connected to a plurality of apparatuses associated with an engine; and

the plurality of sensors is proximate to the engine.