Exhaust gas recirculation apparatus and control method therefor
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02M-025/00
F02M-025/07
F02D-041/00
F02M-026/16
F02M-026/05
F02M-026/06
F02M-026/15
F02M-026/25
F02M-026/24
F02D-021/08
F02B-037/00
출원번호
US-0654754
(2013-12-09)
등록번호
US-9624874
(2017-04-18)
우선권정보
KR-10-2012-0151970 (2012-12-24)
국제출원번호
PCT/KR2013/011350
(2013-12-09)
국제공개번호
WO2014/104611
(2014-07-03)
발명자
/ 주소
Lim, Ji Hoon
출원인 / 주소
Doosan Infracore Co., Ltd.
대리인 / 주소
Veldhuis-Kroeze, John D.
인용정보
피인용 횟수 :
0인용 특허 :
2
초록▼
An exhaust gas recirculation apparatus including an engine; a suction line; an exhaust line; a post-processing unit which is disposed in the exhaust line to reduce hazardous substances contained in the exhaust gas; a first circulation line which guides a part of the exhaust gas, which is guided to t
An exhaust gas recirculation apparatus including an engine; a suction line; an exhaust line; a post-processing unit which is disposed in the exhaust line to reduce hazardous substances contained in the exhaust gas; a first circulation line which guides a part of the exhaust gas, which is guided to the exhaust line, to the suction line; a second circulation line which guides a part of the exhaust gas, which is guided to a downstream side of the post-processing unit, to the suction line; and a bypass line which branches off from an upstream side of the second circulation line, and merges with a downstream side of the second circulation line, wherein ammonia slip, which is discharged from the post-processing unit, is prevented from being guided to the suction line.
대표청구항▼
1. An internal combustion diesel engine comprising: a suction line which is connected to the engine to supply suctioned air;an exhaust line which is connected to the engine to collect exhaust gas from the engine;a post-processing unit which is disposed in the exhaust line to reduce hazardous substan
1. An internal combustion diesel engine comprising: a suction line which is connected to the engine to supply suctioned air;an exhaust line which is connected to the engine to collect exhaust gas from the engine;a post-processing unit which is disposed in the exhaust line to reduce hazardous substances contained in the exhaust gas;a first circulation line, located downstream of the post-processing unit, which guides a part of the exhaust gas, to the suction line;a bypass line which branches off from an upstream side of the second circulation line, and merges with a downstream side of the second circulation line; andan ammonia oxidation catalyst device located on the bypass line,wherein ammonia slip, which is discharged from the post-processing unit, is prevented from being guided to the suction line. 2. The internal combustion diesel engine of claim 1, wherein the first circulation line is in communication with the exhaust line at the downstream side of the post-processing unit and the suction line. 3. The internal combustion diesel engine of claim 1, further comprising a second circulation line which guides a part of the exhaust gas, which is guided from the exhaust line, to the suction line, upstream of the post-processing unit. 4. The internal combustion diesel engine of claim 1, wherein an EGR cooler is further disposed at a downstream side of a portion where the bypass line and the first circulation line merge together. 5. The internal combustion diesel engine of claim 1, wherein a first branch valve is provided at a portion where the first circulation line and the exhaust line merge together. 6. The internal combustion diesel engine of claim 1, wherein a second branch valve is provided at a portion where the first circulation line and the bypass line merge together. 7. The internal combustion diesel engine of claim 1, wherein the post-processing unit is provided with a selective catalytic reduction (SCR) device. 8. An internal combustion diesel engine comprising: a suction line which is connected to the engine to supply suctioned air;an exhaust line which is connected to the engine to collect exhaust gas from the engine;a post-processing unit which is disposed in the exhaust line to reduce hazardous substances contained in the exhaust gas;a first circulation line, located downstream of the post-processing unit, which guides a part of the exhaust gas, to the suction line;a bypass line which branches off from the exhaust line between the second circulation line and the post-processing unit, and merges with the second circulation line; andan ammonia oxidation catalyst device located on the bypass line,wherein ammonia slip, which is discharged from the post-processing unit, is prevented from being guided to the suction line. 9. The internal combustion diesel engine of claim 8, wherein the second circulation line is in communication with the exhaust line at the downstream side of the post-processing unit and the suction line. 10. The internal combustion diesel engine of claim 8, further comprising a second circulation line which guides a part of the exhaust gas, which is guided from the exhaust line, to the suction line, upstream of the post-processing unit. 11. The internal combustion diesel engine of claim 8, wherein an EGR cooler is further disposed at a downstream side of a portion where the bypass line and the second circulation line merge together. 12. The internal combustion diesel engine of claim 8, wherein a first branch valve is provided at a portion where the second circulation line and the exhaust line merge together. 13. The internal combustion diesel engine of claim 8, wherein a second branch valve is provided at a portion where the bypass line and the exhaust line merge together. 14. The internal combustion diesel engine of claim 8, wherein the post-processing unit is provided with a selective catalytic reduction (SCR) device.
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