A power system comprising an engine that produces exhaust, a fuel system that injects a fuel into the engine, an aftertreatment system that treats the exhaust, and is controller. The aftertreatment system includes an oxidation catalyst that converts NO from the engine into NO2, a particulate filter
A power system comprising an engine that produces exhaust, a fuel system that injects a fuel into the engine, an aftertreatment system that treats the exhaust, and is controller. The aftertreatment system includes an oxidation catalyst that converts NO from the engine into NO2, a particulate filter that traps soot from the engine, and a sensor that provides an indication of the amount of soot in the particulate filter. The controller increases an engine fuel injection pressure when the amount of soot in the particulate filter is above a threshold.
대표청구항▼
1. A power system comprising: an engine configured to produce exhaust; a particulate filter configured to trap soot from the engine; anda controller configured to:switch the power system from a first operation mode to a second operation mode configured to regenerate the particulate filter,transition
1. A power system comprising: an engine configured to produce exhaust; a particulate filter configured to trap soot from the engine; anda controller configured to:switch the power system from a first operation mode to a second operation mode configured to regenerate the particulate filter,transition the power system from the first operation mode to the second operation mode over a first period of time in response to an amount of soot in the particulate filter changing relative to a threshold,transition the power system from the first operation mode to the second operation mode over a second period of time less than the first period of time in response to a lond on the power system changing. 2. The power system of claim 1, wherein the second operation mode includes actuating a regeneration valve, and the regeneration valve actuates at a slower rate when the amount of soot in the particulate filter changes relative to the threshold than when the load on the engine increases. 3. The power system of claim 1, wherein a transition from the second operation mode back to the first operation mode occurs at the slower rate when the amount of soot in the particulate filter falls below the threshold than when the load on the engine increases. 4. The power system of claim 3, wherein the second operation mode includes a closing of a regeneration valve, and the regeneration valve opens at the slower rate when the amount of soot in the particulate filter falls below the threshold than when the load on the engine increases. 5. The power system of claim 4, wherein the regeneration valve is a backpressure valve disposed in an exhaust conduit routing the exhaust. 6. The power system of claim 5, wherein the backpressure valve opens in greater than one second when the amount of soot in the particulate filter falls below the threshold, and the backpressure valve opens in less than one second when the load on the engine increases. 7. The power system of claim 6, wherein the backpressure valve opens in greater than two seconds when the amount of soot in the particulate filter falls below the threshold, and the backpressure valve opens in less than one second when the load on the engine increases. 8. The power system of claim 5, wherein the controller delays operation of the backpressure valve after an engine mode changes. 9. The power system of claim 8, wherein the operation of the backpressure valve is delayed for a period of time greater than ten seconds. 10. The power system of claim 9, wherein the operation of the backpressure valve is delayed for a period of time that decreases as the amount of soot in the particulate filter rises beyond the threshold. 11. The power system of claim 10, wherein the operation of the backpressure valve is delayed for a period of time greater than 10 seconds when the amount of soot in the particulate filter is within 5% of the threshold, and a period of time less than ten seconds when the amount of the soot in particulate filter is more than 10% above the threshold. 12. A method of controlling an engine power system to assist regeneration of a particulate filter, the method comprising: operating the power system in a first operation mode;operating the power system in a second operation mode to assist regeneration of a particulate filter;transitioning the power system from the second operation mode to the first operation mode over a first period of time in response to an amount of soot in the particulate filter falling below a threshold; andtransitioning the power system from the second operation mode to the first operation mode over a second period of time less than the first period of time in response to a load on the power system increasing more than a threshold amount, the second operation mode including actuating a regeneration valve over a period of time greater than one second in response to the amount of soot in the particulate filter falling below a threshold, and actuating the regeneration valve over a period of time less than one second in response to the load on the power system increasing more than a threshold amount. 13. The method of claim 12, wherein the second operation mode includes closing a regeneration valve, and the regeneration valve opens over a period of time greater than one second in response to the amount of soot in the particulate filter falling below a threshold, and opens over a period of time of less of one second in response to a load on the power system increasing more than the threshold amount. 14. The method of claim 13, wherein the regeneration valve is a backpressure valve disposed in an exhaust conduit of the engine. 15. The method of claim 14, wherein the backpressure valve opens over a period of time greater than one second in response to the amount of soot in the particulate filter falling below a threshold, and opens over a period of time of less than one second in response to the load on the power system increasing more than a threshold amount. 16. The method of claim 12, wherein the system operates under the second operation mode after an amount of soot in the particulate filter is above a threshold and the load on the power system is below a threshold amount for a current engine speed.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (17)
Weber,James R.; Leman,Scott A.; Coleman,Gerald N.; Duffy,Kevin P.; Fluga,Eric C.; Kilkenny,Jonathan P.; Afjeh,Homa, Air and fuel supply system for a combustion engine.
Trotta Paul M. (Columbus IN) Ebaugh Paul J. (Columbus IN) Barnett Donald T. (Columbus IN), Air intake heating method and device for internal combustion engines.
Stiglic Paul M. (Torrance CA) Gabelman Brian C. (Los Angeles CA) Hardy James A. (Playa Del Rey CA), Control system for diesel particulate trap regeneration system.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.