IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0571252
(2005-06-20)
|
등록번호 |
US-7596942
(2009-10-20)
|
우선권정보 |
FR-04 06854(2004-06-23) |
국제출원번호 |
PCT/FR05/050460
(2005-06-20)
|
§371/§102 date |
20061222
(20061222)
|
국제공개번호 |
WO06/005863
(2006-01-19)
|
발명자
/ 주소 |
|
출원인 / 주소 |
- Peugeot Citroen Automobiles SA
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
6 |
초록
▼
The invention concerns a system for assisting regeneration of pollution management means (1) integrated in an exhaust line (3) of a diesel engine (4), wherein the engine (4) is associated with common ramp means (7, 8) injecting fuel into the cylinders thereof, based on at least one post-injection an
The invention concerns a system for assisting regeneration of pollution management means (1) integrated in an exhaust line (3) of a diesel engine (4), wherein the engine (4) is associated with common ramp means (7, 8) injecting fuel into the cylinders thereof, based on at least one post-injection and adapted to implement, in isocouple, through modification of engine operation control parameters, at least two regeneration strategies called level 1 and level 2 strategies and a second regeneration strategy including level 1 strategies and a sequence alternating the level 2 and over-calibrated level 2 strategies, enabling different thermal levels to be achieved in the exhaust line. The invention is characterized in that it comprises means (8) for analyzing the loading state of the pollution management means and means (8) for comparing same to threshold values, to implement the first regeneration strategy for states with load lower than the threshold values or the second regeneration strategy for states with load higher than the threshold values.
대표청구항
▼
The invention claimed is: 1. System for assisting the regeneration of depollution means integrated in an exhaust line of a motor vehicle diesel engine, in which the engine is associated with common rail supply means for the injection of fuel into the cylinders thereof, according to at least one pos
The invention claimed is: 1. System for assisting the regeneration of depollution means integrated in an exhaust line of a motor vehicle diesel engine, in which the engine is associated with common rail supply means for the injection of fuel into the cylinders thereof, according to at least one post-injection, and adapted to implement, at constant torque, through modification of parameters for controlling the operation of the engine, at least two regeneration strategies, among which a first regeneration strategy comprising strategies called level 1 strategies and level 2 strategies, and a second regeneration strategy comprising level 1 strategies and a sequence alternating level 2 strategies and over-calibrated level 2 strategies, making it possible to obtain different thermal levels in the exhaust line, wherein said system comprises means for analyzing the loading state of the depollution means and means for comparing this loading state with predetermined threshold values, to implement the first regeneration strategy for loading states under the threshold values or the second strategy for loading states above the threshold values, wherein said level 2 strategies is calibrated using a maximal exhaust collector temperature of 800° C. and said over-calibrated level 2 strategies is calibrated using a maximal exhaust collector temperature of 830° C., and wherein said second regeneration strategy allows reaching a temperature at the particle filter inlet of 650° C. in 220 seconds in EUDC cycle whereas this temperature is never reached in EUDC cycle in the first regeneration strategy, and a temperature at the particle filter inlet of 600° C. in 150 seconds in City cycle whereas this temperatures is never reached in City cycle in the first regeneration strategy, so that regeneration with a higher temperature is performed, and the risk that the substrate may crack is reduced. 2. System according to claim 1, wherein the depollution means comprise a particle filter. 3. System according to claim 2, wherein the particle filter is catalyzed. 4. System according to claim 1, wherein the depollution means comprise an NOx trap. 5. System according to claim 1, wherein the fuel comprises an additive intended to be deposited, with the particles with which it is mixed, on the depollution means to facilitate their regeneration. 6. System according to claim 1, wherein the fuel comprises an additive forming NOx trap. 7. System according to claim 1, wherein the depollution means are impregnated with an SCR formulation, ensuring a CO/HC oxidation function. 8. System according to claim 1, wherein the engine is associated with a turbo-compressor. 9. System according to claim 1, wherein the loading states of the depollution means are determined from the head losses at the boundaries of the depollution means. 10. System according to claim 1, wherein the loading states are determined from the counter-pressure at the inlet of the depollution means. 11. System according to claim 1, wherein said level 2 strategies is calibrated using the following criteria: maximal exhaust collector temperature=800° C. maximal catalyst exotherm=150° C. maximal catalyst outlet temperature=710° C. maximal catalyst internal temperature=760° C. minimal oxygen content of the gases at catalyst outlet=3% and said over-calibrated level 2 strategy is calibrated using the following criteria: maximal exhaust collector temperature=830° C. maximal catalyst exotherm=200° C. maximal catalyst outlet temperature=730° C. maximal catalyst internal temperature=no maximal value minimal oxygen content of the gases at catalyst outlet=2%. 12. System according to claim 11, wherein in the second regeneration strategy, a temperature at the particle filter inlet of 650° C. is reached in 220 seconds in EUDC cycle whereas this temperature is never reached in EUDC cycle in the first regeneration strategy, and a temperature at the particle filter inlet of 600° C. is reached in 150 seconds in City cycle whereas this temperatures is never reached in City cycle in the first regeneration strategy. 13. System according to claim 1, wherein in the second regeneration strategy, a temperature at the particle filter inlet of 650° C. is reached in 220 seconds in EUDC cycle whereas this temperature is never reached in EUDC cycle in the first regeneration strategy, and a temperature at the particle filter inlet of 600° C. is reached in 150 seconds in City cycle whereas this temperatures is never reached in City cycle in the first regeneration strategy. 14. System according to claim 12, wherein in the second regeneration strategy, a temperature at the particle filter inlet of 600° C. is reached in 200 seconds in EUDC cycle whereas it is reached in 600 seconds in EUDC cycle in the first regeneration strategy, a temperature at the particle filter inlet of 500° C. is reached in 100 seconds in City cycle whereas it is reached in 150 seconds in City cycle in the first regeneration strategy, and a temperature at the particle filter inlet of 550° C. is reached in 150 seconds in City cycle whereas it is reached in 300 seconds in City cycle in the first regeneration strategy. 15. System according to claim 13, wherein in the second regeneration strategy, a temperature at the particle filter inlet of 600° C. is reached in 200 seconds in EUDC cycle whereas it is reached in 600 seconds in EUDC cycle in the first regeneration strategy, a temperature at the particle filter inlet of 500° C. is reached in 100 seconds in City cycle whereas it is reached in 150 seconds in City cycle in the first regeneration strategy, and a temperature at the particle filter inlet of 550° C. is reached in 150 seconds in City cycle whereas it is reached in 300 seconds in City cycle in the first regeneration strategy.
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