Engine control system and method for initiating a diesel particulate filter regeneration
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F01N-003/00
F01N-003/023
F02D-041/02
F02D-041/08
F02D-041/00
F02D-041/14
출원번호
US-0753059
(2013-01-29)
등록번호
US-9010094
(2015-04-21)
발명자
/ 주소
O'Neil, Kevin A.
Bakken, Arick M.
Bachle, Andrew P.
Preble, Jr., John E.
출원인 / 주소
Caterpillar Inc.
대리인 / 주소
Miller, Matthias & Hull LLP
인용정보
피인용 횟수 :
0인용 특허 :
2
초록▼
An engine command override may occur when a diesel particulate filter (DPF) requires regeneration. The need for regeneration may be indicated by regeneration level. The engine may be operated in a normal mode when the DPF regeneration level is below a regeneration level threshold, wherein the engine
An engine command override may occur when a diesel particulate filter (DPF) requires regeneration. The need for regeneration may be indicated by regeneration level. The engine may be operated in a normal mode when the DPF regeneration level is below a regeneration level threshold, wherein the engine command is based on the throttle input. Additionally, the engine may be operated in an override mode when the DPF regeneration level is above a regeneration level threshold and the engine is operating in the idle state, wherein the engine command is based on a predetermined throttle regeneration setting.
대표청구항▼
1. A method of automatically controlling an engine to override a throttle input setting and operate at a predetermined throttle regeneration setting sufficient to initiate a regeneration event for a diesel particulate filter associated with a machine and operably coupled to the engine, the engine in
1. A method of automatically controlling an engine to override a throttle input setting and operate at a predetermined throttle regeneration setting sufficient to initiate a regeneration event for a diesel particulate filter associated with a machine and operably coupled to the engine, the engine including a controller configured to generate an engine command setting, the method comprising: determining a DPF regeneration level indicative of a need to regenerate the diesel particulate filter;determining whether the engine is in an idle state by determining that the throttle input setting remains below a throttle regeneration threshold, wherein the throttle regeneration threshold is 40-70% of a maximum throttle level associated with the engine;operating the engine in a normal mode when the DPF regeneration level is below a regeneration level threshold, wherein the engine command setting in the normal mode is based on a throttle input setting; andoperating the engine in an override mode when the DPF regeneration level is above a regeneration level threshold and the engine is operating in the idle state, wherein the engine command setting in the override mode is based on the predetermined throttle regeneration setting. 2. The method of claim 1, in which the DPF regeneration level is based on at least one DPF operating parameter associated with the diesel particulate filter, wherein the at least one DPF operating parameter is selected from a group of DPF operating parameters including DPF soot level, machine operating time, and machine operating load. 3. The method of claim 1, in which determining the idle state further comprises determining that the at least one idle parameter is present for a threshold idle time period. 4. The method of claim 1, in which the predetermined throttle regeneration setting is 40-70% of a maximum throttle level associated with the engine when the DPF regeneration level is indicative of an active regeneration. 5. The method of claim 1, in which the predetermined throttle regeneration setting is 0% of a maximum throttle level associated with the engine when the DPF regeneration level is indicative of a manual regeneration. 6. The method of claim 1, in which operating the engine in the override mode further comprises changing the engine command setting at a throttle ramp entry rate until the engine command setting is at the predetermined throttle regeneration setting. 7. The method of claim 6, in which the throttle ramp entry rate is 50-5000 RPM/sec. 8. The method of claim 1, in which operating the engine in the override mode further comprises activating an alert indicator associated with the machine. 9. A machine comprising: an engine having an exhaust manifold;a diesel particulate filter fluidly connected to the exhaust manifold, the diesel particulate filter having a DPF regeneration level indicative of a need for regeneration;a DPF sensor configured to determine the DPF regeneration level;a throttle input device configured to generate a throttle input setting; anda controller operably coupled to the engine, the DPF sensor, and the throttle input device, the controller being configured to: determine an engine command setting;receive the DPF regeneration level;receive the throttle input setting;determine whether the engine is in an idle state by determining that the throttle input setting remains below a throttle regeneration threshold, wherein the throttle regeneration threshold is 40-70% of a maximum throttle level associated with the engine;operate the engine in a normal mode when the DPF regeneration level is below a regeneration level threshold, wherein the engine command setting in the normal mode is based on a throttle input setting; andoperate the engine in an override mode when the DPF regeneration level is above a regeneration level threshold and the engine is operating in the idle state, wherein the engine command setting in the override mode is based on a predetermined throttle regeneration setting. 10. The machine of claim 9, in which the DPF sensor is configured to determine at least one DPF operating parameter associated with the diesel particulate filter, wherein the at least one DPF operating parameter is selected from a group of DPF operating parameters including DPF soot level, machine operating time, and machine operating load. 11. The machine of claim 9, in which the controller is further configured to determine the idle state by determining that the at least one idle parameter is present for a threshold idle time period. 12. The machine of claim 9, in which the predetermined throttle regeneration setting is 40-70% of a maximum throttle level associated with the engine when the DPF regeneration level is indicative of an active regeneration. 13. The machine of claim 9, in which the predetermined throttle regeneration setting is 0% of a maximum throttle level associated with the engine when the DPF regeneration level is indicative of an active regeneration. 14. The machine of claim 9, in which the controller, in the override mode, is further configured to change the engine command setting at a throttle ramp entry rate until the engine command setting is at the predetermined throttle regeneration setting. 15. The machine of claim 14, in which the throttle ramp entry rate is 50-5000 RPM/sec. 16. The machine of claim 9, in which the controller, in the override mode, is further configured to activate an alert indicator associated with the machine. 17. A method of automatically controlling an engine to override a throttle input setting and operate at a predetermined throttle regeneration setting sufficient to initiate a regeneration event for a diesel particulate filter associated with a machine and operably coupled to the engine, the engine including a controller configured to generate an engine command setting, the method comprising: determining a DPF regeneration level indicative of a need to regenerate the diesel particulate filter;determining whether the engine is in an idle state;operating the engine in a normal mode when the DPF regeneration level is below a regeneration level threshold, wherein the engine command setting in the normal mode is based on a throttle input setting; andoperating the engine in an override mode when the DPF regeneration level is above a regeneration level threshold and the engine is operating in the idle state, wherein the engine command setting in the override mode is based on the predetermined throttle regeneration setting, and in which the predetermined throttle regeneration setting is 40-70% of a maximum throttle level associated with the engine when the DPF regeneration level is indicative of an active regeneration.
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이 특허에 인용된 특허 (2)
Funke,Steven J.; Bloms,Jason K.; Knitt,Andrew A.; Ammineni,Chandini A. M.; Withrow,Michael P., Particulate trap regeneration system and control strategy.
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