IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0095456
(2013-12-03)
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등록번호 |
US-9303596
(2016-04-05)
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우선권정보 |
KR-10-2013-0103793 (2013-08-30) |
발명자
/ 주소 |
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출원인 / 주소 |
|
대리인 / 주소 |
Morgan, Lewis & Bockius LLP
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인용정보 |
피인용 횟수 :
0 인용 특허 :
5 |
초록
▼
An EGR cooler and an EGR cooler device includes a pre-cooler which is located at a central region at which a cooling water chamber of an EGR cooler housing, in which cooling water circulates, is divided into two spaces, and in which hot exhaust gas introduced from an exhaust system is discharged as
An EGR cooler and an EGR cooler device includes a pre-cooler which is located at a central region at which a cooling water chamber of an EGR cooler housing, in which cooling water circulates, is divided into two spaces, and in which hot exhaust gas introduced from an exhaust system is discharged as primary-cooled exhaust gas via heat-exchange with the cooling water. Therefore, it may be possible to reduce costs by a decrease in number of EGR tubes via optimal primary cooling performance for the exhaust gas in the pre-cooler and particularly to relieve damage by a thermal load generated due to the hot exhaust gas by fully surrounding an inlet and an outlet of the pre-cooler with the circulating cooling water.
대표청구항
▼
1. An exhaust gas recirculation (EGR) cooler comprising: an EGR cooler housing including a cooling water chamber in which a cooling water circulates, introduced from outside of the EGR cooler housing and then discharged to the outside thereof;a pre-cooler in which a hot exhaust gas introduced from a
1. An exhaust gas recirculation (EGR) cooler comprising: an EGR cooler housing including a cooling water chamber in which a cooling water circulates, introduced from outside of the EGR cooler housing and then discharged to the outside thereof;a pre-cooler in which a hot exhaust gas introduced from an exhaust system is discharged as primary-cooled exhaust gas via heat-exchange with the cooling water, the pre-cooler including a space blocked from the cooling water, the pre-cooler being located at a central region at which the cooling water chamber is divided into two upper and lower spaces; andan EGR tube including an upper EGR tube and a lower EGR tube which are respectively located in the upper and lower spaces divided by the pre-cooler, and in which the primary-cooled exhaust gas is converted into secondary-cooled EGR gas via heat-exchange with the cooling water in each of the upper EGR tube and the lower EGR tube,wherein the EGR cooler housing further includes a pre-cooler chamber surrounded and enclosed by the cooling water and sealed from the cooling water, the pre-cooler located at the central region of the cooling water chamber so that the space of the cooling water chamber is divided into the upper space and the lower space below the pre-cooler chamber. 2. The EGR cooler of claim 1, wherein: a flow direction in which the hot exhaust gas introduced into the pre-cooler is converted into the primary-cooled exhaust gas and then discharged from the pre-cooler, is the same as a flow direction of the cooling water; anda flow direction in which the primary-cooled exhaust gas introduced into each of the upper and lower EGR tubes is converted into the secondary-cooled EGR gas, is opposite to the flow direction of the cooling water. 3. The EGR cooler of claim 1, wherein each of the upper and lower EGR tubes discharges the EGR gas, and the EGR cooler housing includes a first EGR gas outlet port through which the EGR gas emitted from the upper EGR tube is discharged and a second EGR gas outlet port through which the EGR gas emitted from the lower EGR tube is discharged. 4. The EGR cooler of claim 1, wherein the pre-cooler comprises an exhaust gas tube located and sealed at the central region at which the cooling water chamber is divided into two upper and lower spaces so as to be surrounded with the cooling water, an exhaust gas inlet port through which the hot exhaust gas is introduced into the exhaust gas tube, and an exhaust gas outlet port through which the primary-cooled exhaust gas is discharged from the exhaust gas tube. 5. The EGR cooler of claim 4, wherein the primary-cooled exhaust gas emitted from the exhaust gas outlet port is introduced into each of the upper and lower EGR tubes. 6. The EGR cooler of claim 1, wherein: the upper EGR tube includes a first population of three tubes, the primary-cooled exhaust gas flowing in each member of the first population of three tubes, first baffles which fix the first population of three tubes spaced between the first baffles and a first nozzle to collect the EGR gas emitted from each member of the first population of three tubes; andthe lower EGR tube includes a second population of three tubes, the primary-cooled exhaust gas flowing in each member of the second population of three tubes, second baffles which fix the second population of three tubes spaced between the second baffles, and a second nozzle to collect the EGR gas emitted from each member of the second population of three tubes. 7. The EGR cooler of claim 6, wherein the upper and lower EGR tubes are coupled with a valve connector fastened to the EGR cooler housing, the first nozzle of the upper EGR tube is connected to the first EGR gas outlet port of the EGR cooler housing, and the second nozzle of the lower EGR tube is connected to the second EGR gas outlet port of the EGR cooler housing. 8. The EGR cooler device of claim 1, wherein the pre-cooler chamber includes an exhaust gas tube therein and configured to receive exhaust gas in the exhaust gas tube. 9. An exhaust gas recirculation (EGR) cooler device comprising: an EGR cooler including an EGR cooler housing within which cooling water circulates, a pre-cooler located at a central region at which an inner space of the EGR cooler housing is divided into two upper and lower spaces such that hot exhaust gas introduced from an exhaust system is cooled via heat-exchange with the cooling water, and an upper EGR tube and a lower EGR tube, the primary-cooled exhaust gas flowing in each of the upper EGR tube and the lower EGR tube so as to be converted into secondary-cooled EGR gas via heat-exchange with the cooling water; andan EGR valve which connects the pre-cooler to the EGR cooler such that the cooled exhaust gas by the pre-cooler is introduced into the EGR valve and distributed to each of the upper EGR tube and the lower EGR tube,wherein the EGR cooler housing further includes a pre-cooler chamber surrounded and enclosed by the cooling water and sealed from the cooling water, the pre-cooler chamber located at the central region of the EGR cooler housing so that an inner space of the EGR cooler housing is divided into an upper space and a lower space below the pre-cooler chamber. 10. The EGR cooler device of claim 9, wherein the EGR cooler housing comprises: a first EGR gas outlet port which is connected with the upper EGR tube and through which the EGR gas is discharged; anda second EGR gas outlet port which is connected with the lower EGR tube and through which the EGR gas is discharged. 11. The EGR cooler device of claim 9, wherein the EGR valve comprises: a valve inlet port which is connected to the pre-cooler and through which the primary-cooled exhaust gas is introduced;a first valve outlet port which divides at the valve inlet port and through which the primary-cooled exhaust gas is transferred to the upper EGR tube; anda second valve outlet port which divides at the valve inlet port and through which the primary-cooled exhaust gas is transferred to the lower EGR tube. 12. The EGR cooler device of claim 9, wherein the EGR valve and the upper and lower EGR tubes are coupled with a valve connector, and the valve connector is fastened to the EGR cooler housing. 13. The EGR cooler device of claim 9, wherein the pre-cooler chamber includes an exhaust gas tube therein and configured to receive exhaust gas in the exhaust gas tube.
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