Modular exhaust gas recirculation cooling for internal combustion engines
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02B-033/44
F02B-029/04
F02M-025/07
출원번호
US-0062210
(2008-04-03)
등록번호
US-8132407
(2012-03-13)
발명자
/ 주소
Li, Xiaobin (Sharon)
El Tahry, Sherif H.
Redon, Fabien G.
출원인 / 주소
GM Global Technology Operations LLC
대리인 / 주소
Harness, Dickey & Pierce, P.L.C.
인용정보
피인용 횟수 :
4인용 특허 :
10
초록▼
An EGR system compensates for differing EGR flows and/or exhaust temperatures and can maintain the cooler exit temperature above the critical temperature, thereby reducing the possibility of EGR cooler fouling. A plurality of exhaust gas recirculation cooler modules is disposed between an exhaust ga
An EGR system compensates for differing EGR flows and/or exhaust temperatures and can maintain the cooler exit temperature above the critical temperature, thereby reducing the possibility of EGR cooler fouling. A plurality of exhaust gas recirculation cooler modules is disposed between an exhaust gas passage and an air passage. The cooler modules receive exhaust gas from the exhaust gas passage and supply the received exhaust gas to the air passage for recirculation into an intake manifold. Each of the cooler modules includes a cooler portion, a bypass portion, and a flow control device. The cooler portion and the bypass portion are arranged such that fluid flowing through the cooler portion and the bypass portion flows therethrough without flowing through the other of the cooler portion and the bypass portion. The cooler portion reduces a temperature of the fluid flowing through the cooler portion.
대표청구항▼
1. A method of cooling an exhaust recirculation gas flow with a plurality of exhaust cooler modules each having a cooler portion and a bypass portion, the method comprising: routing a portion of an exhaust gas flow in a region of an engine exhaust gas passage being located in an engine exhaust gas f
1. A method of cooling an exhaust recirculation gas flow with a plurality of exhaust cooler modules each having a cooler portion and a bypass portion, the method comprising: routing a portion of an exhaust gas flow in a region of an engine exhaust gas passage being located in an engine exhaust gas flow path between an engine exhaust manifold and an exhaust side of a turbocharger into an exhaust gas recirculation passage;routing some of the exhaust gas in the gas recirculation passage through each one of the plurality of exhaust gas cooler modules, the plurality of cooler modules being disposed in the exhaust gas recirculation passage and arranged in series in the exhaust gas recirculation passage such that all fluid flowing through the exhaust gas recirculation passage flows through every cooler module inlets of the plurality of exhaust gas cooler modules being in communication with the first region of the engine exhaust selectively removing heat from the exhaust gas flow flowing through the exhaust gas recirculation passage with at least two of the plurality of exhaust gas cooler modules disposed in the exhaust gas recirculation passage and through which the exhaust gas flows; andselectively supplying exhaust gas from the exhaust recirculation passage to an air intake passage. 2. The method of claim 1, wherein selectively removing heat includes routing the exhaust gas flow through either the bypass portion or the cooler portion in each of the cooler modules. 3. The method of claim 2, wherein selectively removing heat includes actively adjusting the cooler modules to change whether the exhaust gas flowing therethrough flows through the bypass portion or the cooler portion. 4. The method of claim 3, further comprising monitoring an air intake temperature, an exhaust gas temperature upstream of the cooler modules, and an exhaust gas temperature downstream of the cooler modules and wherein actively adjusting the cooler modules includes actively adjusting the cooler modules based on one or more of the monitored temperatures. 5. A modular exhaust gas recirculation system comprising: an exhaust gas passage receiving exhaust gases discharged by an engine;an air passage adapted to communicate with and supply air to an intake manifold;an exhaust gas recirculation passage extending between the exhaust gas passage and the air passage; anda plurality of exhaust gas recirculation cooler modules disposed between the exhaust gas passage and the air passage, the cooler modules receiving exhaust gas from the exhaust gas passage and supplying received exhaust gas to the air passage, the plurality of cooler modules being disposed in the exhaust gas recirculation passage and arranged in series in the exhaust gas recirculation passage such that all fluid flowing through the exhaust gas recirculation passage flows through every cooler module,wherein each of the cooler modules includes an inlet in communication with a region of the engine exhaust gas passage being located in an engine exhaust gas flow path between an engine exhaust manifold and an exhaust side of a turbocharger, an outlet, a cooler portion, a bypass portion, and a flow control device, the cooler portion and the bypass portion each communicating with the inlet and outlet and arranged such that fluid flowing through the cooler portion and the bypass portion flows therethough without flowing through the other of the cooler portion and the bypass portion, and the cooler portion reducing a temperature of fluid flowing through the cooler portion. 6. The modular exhaust gas recirculation system of claim 1, further comprising a flow control device in the exhaust gas recirculation passage operable to selectively allow flow through the exhaust gas recirculation passage. 7. The modular exhaust gas recirculation system of claim 1, further comprising a control module selectively operating the flow control devices in the cooler modules to direct fluid flowing therethrough into either the associated bypass portion or the associated cooler portion. 8. The modular exhaust gas recirculation system of claim 7, further comprising a plurality of sensors providing signals to the control module indicative of operating conditions and wherein the control module adjusts the flow control devices based on the signals. 9. The modular exhaust gas recirculation system of claim 8, wherein the sensors provide signals indicative of an intake air temperature, an exhaust gas temperature, and a temperature of fluid flowing through the exhaust gas recirculation passage downstream of at least one of the cooler modules. 10. An engine system comprising: an engine having cylinders therein operable to combust air and a fuel;an air intake manifold communicating with the engine cylinders;an exhaust manifold communicating with the engine cylinders;an exhaust gas passage communicating with the exhaust manifold and receiving exhaust gases discharged by the cylinders;an air passage communicating with the intake manifold and supplying air to the intake manifold;an exhaust gas recirculation passage extending between the exhaust gas passage and the air passage; anda plurality of exhaust gas recirculation cooler modules disposed between the exhaust gas passage and the air passage, the cooler modules receiving exhaust gas from the exhaust gas passage and supplying received exhaust gas to the air passage for recirculation into the intake manifold, the plurality of cooler modules being disposed in the exhaust gas recirculation passage and arranged in series in the exhaust gas recirculation passage such that all fluid flowing through the exhaust gas recirculation passage flows through every cooler module, wherein each of the cooler modules includes an inlet in communication with a region of the engine exhaust gas passage being located in an engine exhaust gas flow path between the engine exhaust manifold and an exhaust side of a turbocharger, an outlet, a cooler portion, a bypass portion, and a flow control device, the cooler portion and the bypass portion each communicating with the inlet and outlet and arranged such that fluid flowing through the cooler portion and the bypass portion flows therethrough without flowing through the other of the cooler portion and the bypass portion, the cooler portion reducing a temperature of fluid flowing through the cooler portion. 11. The engine system of claim 10, further comprising a control module selectively operating the flow control devices in the cooler modules to direct fluid flowing therethrough into either the associated bypass portion or the associated cooler portion. 12. The engine system of claim 11, further comprising a plurality of sensors providing signals to the control module indicative of operating conditionsof the engine system and wherein the control module adjusts the flow control devices based on the signals. 13. The engine system of claim 12, wherein the sensors provide signals indicative of an intake air temperature, an exhaust gas temperature, and a temperature of fluid flowing through the exhaust gas recirculation passage downstream of at least one of the cooler modules. 14. The engine system of claim 10, further comprising a cooling system having a coolant flowing therethrough, the coolant flowing through the engine and through the cooler portions of the cooler modules and removing heat from fluid flowing through the cooler portions.
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