APPARATUS, SYSTEM, AND METHOD FOR ADAPTIVE ENGINE SYSTEM CONTROL WITH INTEGRATED GLOBAL POSITION SENSING

• US 20120167555A1
• Filed: 08/13/2010
• Published: 07/05/2012
• Est. Priority Date: 08/13/2009
• Status: Active Grant

• Current Assignee: Cummins Incorporated
• Original Assignee: Cummins Incorporated
• Inventors: Frazier, Timothy R.
• Granted Patent: US 8,881,505 B2
• Time in Patent Office: Days
• US Class Current: 60/274
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 2510/0657 Engine torque
• CPC Class Codes: B60W 2552/20 Road profile, i.e. the change in elevation or curvature of a plurality of continuous road segments
• CPC Class Codes: B60W 2556/10 Historical data
• CPC Class Codes: B60W 2556/50 of positioning data, e.g. GPS [Global Positioning System] data
• CPC Class Codes: B60W 40/12 related to parameters of the vehicle itself , e.g. tyre models
• CPC Class Codes: B60W 50/0097 Predicting future conditions
• CPC Class Codes: B60Y 2300/476 Regeneration of particle filters
• CPC Class Codes: F01N 2900/102 Travelling distance
• CPC Class Codes: F01N 9/002 of filter regeneration, e.g. detection of clogging
• CPC Class Codes: F02D 2200/701 Information about vehicle position, e.g. from navigation system or GPS signal
• CPC Class Codes: Y02A 50/20 Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

According to one embodiment, an apparatus includes an electronic controller (15) for an internal combustion engine (12) of a motor vehicle. The electronic controller includes a location detection module (32) configured to identify a location of the motor vehicle by a global positioning system (GPS) device (18). Also, the electronic controller includes a driving condition prediction module (34) configured to determine a direction of travel and access geographic information data for a path to be traveled by the motor vehicle. The electronic controller also has a simulation module (36) configured to simulate engine performance including effects from parasitic loads. Still further, the electronic controller includes a parasitic load control module (38) configured to adjust the timing for one or more of a regeneration process for an exhaust filter and at least one other parasitic load in order to maintain engine performance at or above a predetermined threshold.

Claims

1. A system for timing an after-treatment process in an exhaust gas after-treatment system of a motor vehicle coupled to an internal combustion engine, the system comprising:

a controller operatively connected to the internal combustion engine, the controller configured to control the internal combustion engine and exhaust after-treatment system processes;

a geographical locator operably connected to the controller and configured to provide data to the controller for detecting a location of the motor vehicle in which the locator is housed; and

a database accessibly connected to the controller, the database storing geographic information;

wherein the controller is configured to;

determine a current load of the engine and predict a future load of the engine at a future driving location, the future driving location being based on the detected location and geographic information;

initiate an exhaust after-treatment process if a difference between the predicted future engine load and a desired engine load for an exhaust after-treatment process is greater than a predetermined threshold representing a current state of the exhaust gas after-treatment system; and

delay a requested exhaust after-treatment process until the vehicle arrives at the future location if the difference between the predicted future engine load and the desired engine load for the exhaust after-treatment process is less than the predetermined threshold.

2. The system of claim 1, wherein the future driving location also is based on at least one of a direction of travel of the motor vehicle, a current vehicle speed, and a current vehicle acceleration.

3. The system of claim 2, wherein the controller is configured to automatically receive a signal representing the location of the vehicle at predetermined intervals such that a difference in locations from one interval to another establishes the direction of travel of the motor vehicle, the current vehicle speed, and the current vehicle acceleration.

4. The system of claim 1, wherein the controller comprises a simulation module configured to simulate engine performance corresponding with predicted future driving conditions based on at least one of the future driving location, direction of travel of the vehicle, vehicle speed, vehicle acceleration, and geographic information.

5. The system of claim 4, wherein the simulation module is further configured to simulate engine performance during the exhaust after-treatment process if initiated and simulate engine performance during the exhaust after-treatment process if delayed, the simulated engine performance being based on at least one of a current speed and a predicted future speed of the vehicle at the future location.

6. The system of claim 4, wherein the controller further comprises a parasitic load control module configured to selectively control a combination of parasitic loads based on feedback from the simulation module, and wherein the current and predicted engine loads are based on the parasitic loads.

7. The system of claim 5, wherein the controller initiates the exhaust after-treatment process if the simulated engine performance associated with initiating the exhaust after-treatment process is less than a predetermined threshold, and the controller delays the exhaust aftertreament process until the vehicle arrives at the future location if the simulated engine performance associated with delaying the exhaust after-treatment process is more than a predetermined threshold.

8. The system of claim 1, wherein the exhaust after-treatment process comprises a filter regeneration event, and wherein the controller promptly initiates the filter regeneration event if the predicted engine load is less than the current engine load, and the controller delays the exhaust after-treatment process until the vehicle arrives at the future location if the predicted engine load at the future location is greater than the current engine load.

9. The system of claim 1, wherein the exhaust after-treatment process comprises a reductant dosing event for a selective catalytic reduction system.

10. The system of claim 1, wherein the controller comprises a delay module configured to determine a maximum delay based on a condition of an exhaust after-treatment system component affected by the exhaust after-treatment system process, and wherein when the difference between the predicted engine load at the future location and the desired engine load for the exhaust after-treatment process is less than the difference between the current engine load and the desired engine load, the controller delays the exhaust after-treatment process no more than approximately the maximum delay.

11. The system of claim 10, wherein when the difference between the predicted engine load at the future location and the desired engine load for the exhaust after-treatment process is less than the difference between the current engine load and the desired engine load, the controller initiates the exhaust after-treatment process prior to the vehicle reaching the future location if a predicted amount of time for reaching the future location is greater than the maximum delay.

12. The system of claim 1, wherein the predicted future driving condition at the future location is based at least partially on a time history of engine performance.

13. The system of claim 1, wherein:

the exhaust after-treatment process comprises a particulate filter regeneration event;

when the predicted future driving condition comprises an uphill climb associated with a predetermined grade increase relative to a current driving condition, the controller delays the particulate filter regeneration event until the vehicle begins the uphill climb;

when the predicted future driving condition comprises a downhill descent associated with a grade decrease relative to the current driving condition, the controller promptly initiates the particulate filter regeneration event; and

when the predicted future driving condition is substantially the same as a current driving condition, the controller promptly initiates the particulate filter regeneration event.

14. The system of claim 1, wherein:

the exhaust after-treatment process comprises a reductant dosing event for a selective catalytic reduction system;

when the predicted future driving condition comprises a first uphill climb associated with a grade increase greater than a predetermined grade increase or a first downhill descent associated with a grade decrease greater than a predetermined grade decrease relative to a current driving condition, the controller promptly initiates the reductant dosing event; and

when the predicted future driving condition comprises a second uphill climb associated with a grade increase less than the predetermined grade increase or a second downhill descent associated with a predetermined grade decrease less than the predetermined grade decrease relative to the current driving condition, and the second uphill climb or second downhill descent promotes exhaust conditions for the reductant dosing event relative to current exhaust conditions, the controller delays the reductant dosing event until the vehicle begins the second uphill climb or second downhill descent.

15. The system of claim 1, wherein the controller is configured to promptly initiate the exhaust after-treatment process or delay the exhaust after-treatment process based on a desired fuel efficiency.

16. The system of claim 1, wherein the predetermined threshold is based on a comparison between a current capability of the exhaust gas after-treatment system and a desired capability of the exhaust after-treatment system.

17. An electronic controller for an internal combustion engine of a motor vehicle, the electronic controller comprising:

a location detection module configured to identify a location of the motor vehicle using a geographical locator device;

a driving condition prediction module configured to determine a direction of travel and access geographic information data to determine a predicted path to be traveled by the motor vehicle;

a simulation module configured to simulate engine performance including effects from parasitic loads; and

a parasitic load control module configured to adjust a timing for at least one of a regeneration process for an exhaust filter, a selective catalytic reduction process, and a parasitic load process in order to maintain at least one of engine performance and efficiency at or above a predetermined threshold during the at least one process.

18. The electronic controller of claim 17, further comprising a user input module configured to enable a user to enter at least one of a predetermined performance parameter and a predetermined efficiency parameter.

19. The electronic controller of claim 18, wherein the user input module further comprises a user interface, wherein the user interface enables a user to enter the predetermined threshold, the threshold comprising at least one of a minimum vehicle speed, and a minimum engine RPM.

20. The electronic controller of claim 17, wherein the simulation module models a load on the engine under present and future driving conditions and the parasitic load control module selectively determines when to initiate at least one after-treatment process based on a model of the simulation module.

21. A method of timing a regeneration process on an internal combustion engine of a motor vehicle, the method comprising:

receiving a location and other geographic information from a geographical locator device;

determining a direction and a route of a motor vehicle;

predicting future engine performance of an internal combustion engine of the motor vehicle based on the geographic information and the route;

initiating a regeneration process if the future engine performance is below a threshold; and

delaying a requested regeneration process if a current engine performance is below the threshold and the future engine performance is above the threshold.

22. The method of claim 21, further comprising:

receiving an after-treatment system process request;

modeling present and future loads, efficiency, and performance of the engine; and

selectively delaying initiation of the after-treatment process based on a simulation model in order to maintain at least one of efficiency and performance of the engine.

23. The method of claim 22, wherein modeling present and future loads comprises simulating at least one after-treatment system process including a period of duration of the after-treatment system process.

24. The method of claim 21, wherein predicting future engine performance comprises simulating present and future driving conditions.

25. The method of claim 21, further comprising selecting the threshold value and inputting that value into a controller operably connected to the engine.

26. The method of claim 21, further comprising a driving condition prediction module determining a direction of travel and accessing geographic information data for a path to be traveled by the motor vehicle.

27. An article of manufacture comprising a computer program storage medium readable by a processor and embodying one or more instructions executable by a processor to perform a method for determining timing of an exhaust after-treatment system process, the method comprising:

detecting at least one of a time elapsed and a condition triggering a regeneration event on an exhaust after-treatment system component;

identifying a location of a motor vehicle based on data received from a geographical locator device;

predicting a future path to be traveled by the motor vehicle based on the identified location of the motor vehicle, a determined direction of travel of the motor vehicle, and geographical information; and

adjusting a timing of the regeneration event based at least partially on the predicted path to be traveled, the timing of the regeneration event being adjusted to maintain engine performance at or above a predetermined threshold.

28. The article of manufacture of claim 27, wherein the method further comprises simulating engine performance during at least one predicted active parasitic load.

29. The article of manufacture of claim 27, wherein the method further comprises enabling a user to enter a predetermined performance parameter.

30. The article of manufacture of claim 27, wherein the method further comprises adjusting processes that cause parasitic loads on the engine to maintain engine performance at or above the predetermined threshold.