Turbocharger and air induction system incorporating the same and method of using the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02B-033/44
F04D-031/00
F04D-029/42
F02B-037/18
F04D-025/04
F02M-026/09
F02M-026/41
F02B-029/04
F02M-035/116
F02M-026/05
F02M-026/25
출원번호
US-0580294
(2009-10-16)
등록번호
US-9759228
(2017-09-12)
발명자
/ 주소
Romblom, Edward R.
Tkac, Ronald M.
Arvan, Gary J.
출원인 / 주소
GM GLOBAL TECHNOLOGY OPERATIONS LLC
대리인 / 주소
Cantor Colburn LLP
인용정보
피인용 횟수 :
0인용 특허 :
23
초록▼
A turbocharger having a turbine housing with an integral EGR conduit is disclosed. The turbine includes a turbine wheel attached to a turbine shaft and rotatably disposed in a turbine housing having a turbine volute conduit having a turbine inlet passage fluidly coupled to a turbine volute conduit h
A turbocharger having a turbine housing with an integral EGR conduit is disclosed. The turbine includes a turbine wheel attached to a turbine shaft and rotatably disposed in a turbine housing having a turbine volute conduit having a turbine inlet passage fluidly coupled to a turbine volute conduit having a turbine volute passage and a turbine volute inlet and an EGR conduit having an EGR passage, the EGR passage having an EGR conduit inlet, the EGR conduit inlet disposed on the turbine inlet conduit. The turbine inlet conduit is configured for fluid communication of a first portion of an exhaust gas flow received from an engine to the turbine wheel. The EGR conduit is configured for fluid communication of a second portion of the exhaust gas flow to an engine intake manifold.
대표청구항▼
1. A turbocharger, comprising: a turbine, the turbine comprising a turbine wheel, a turbine shaft and a turbine housing, the turbine wheel attached to the turbine shaft, the turbine wheel and shaft rotatably disposed in the turbine housing, the turbine housing comprising:a turbine inlet conduit havi
1. A turbocharger, comprising: a turbine, the turbine comprising a turbine wheel, a turbine shaft and a turbine housing, the turbine wheel attached to the turbine shaft, the turbine wheel and shaft rotatably disposed in the turbine housing, the turbine housing comprising:a turbine inlet conduit having a turbine inlet passage that is fluidly coupled to a turbine volute conduit having a turbine volute passage and a turbine volute inlet;an EGR conduit having an EGR passage, the EGR passage having an EGR conduit inlet, the EGR conduit inlet disposed downstream of the turbine inlet conduit and located upstream of the turbine volute inlet, the turbine inlet conduit configured for fluid communication of a first portion of an exhaust gas flow received from an engine to the turbine wheel via the turbine volute passage, the EGR conduit configured for fluid communication of a second portion of the exhaust gas flow to an engine intake manifold, the first portion and the second portion being separated upstream of the turbine volute inlet via the turbine volute inlet and the EGR conduit inlet, respectively, wherein the EGR conduit is integrally formed with the turbine volute conduit, the EGR conduit and the turbine volute conduit sharing a common wall along a portion of their lengths, and wherein the cross-sectional area of the EGR conduit passage is less than or equal to the cross-sectional area of the turbine volute passage; andan EGR valve located downstream of the EGR conduit inlet and the turbine volute inlet, the EGR valve switchable between at least an open and a closed position, the open position enabling fluid communication from the EGR conduit to the engine intake manifold and defining a first operating mode, and the closed position disabling fluid communication from the EGR conduit to the engine intake manifold and defining a second operating mode, wherein the second portion of exhaust gas flow is routed through the EGR conduit as exhaust to a location other than the engine intake manifold and the turbine wheel when the EGR valve is in the closed position. 2. The turbocharger of claim 1, wherein the EGR conduit has an EGR conduit axis proximate the EGR inlet and the turbine inlet conduit has a turbine inlet conduit axis proximate the EGR inlet, and wherein the turbine inlet conduit axis is separated from the EGR conduit axis by an angle α that is 10° to less than 3 0°. 3. The turbocharger of claim 1, wherein the turbine inlet conduit comprises a plurality of inlet conduits. 4. The turbocharger of claim 1, further comprising a diesel engine having a first exhaust port and a second exhaust port, wherein the turbine inlet conduit comprises a first conduit branch and a second conduit branch. 5. The turbocharger of claim 4, wherein the diesel engine is a V-type engine having a first cylinder bank and a radially separated second cylinder bank, the first exhaust port disposed on the first cylinder bank and in fluid communication with the first conduit branch, the second exhaust port disposed on the second cylinder bank and in fluid communication with the second conduit branch. 6. The turbocharger of claim 1, wherein the turbine volute conduit and EGR conduit comprise an integral metal casting. 7. The turbine housing of claim 1, wherein the turbine volute conduit, EGR conduit and turbine inlet conduit comprise an integral metal casting. 8. A method of using an intake air system for an internal combustion engine, comprising: providing an internal combustion engine having a turbocharger in fluid communication with an intake manifold of the engine and configured to provide a forced-induction airflow thereto having a first pressure, the turbocharger comprising a turbine housing, the turbine housing comprising a turbine inlet conduit having a turbine inlet passage and an EGR conduit having an EGR passage, the EGR passage having an EGR conduit inlet, the EGR conduit inlet disposed downstream of the turbine inlet conduit and located upstream of the turbine volute inlet, the EGR conduit configured for fluid communication of an EGR flow to an EGR valve located downstream of the EGR conduit inlet and the turbine volute inlet and switchable between an open and a closed position, the open position enabling fluid communication of the EGR flow having a second pressure to the intake manifold and defining a first operating mode, and the closed position disabling fluid communication from the EGR conduit to the intake manifold and defining a second operating mode, wherein in the first mode the second pressure is greater than the first pressure and an EGR flow to the engine is promoted within the intake manifold;operating the engine to produce an exhaust gas flow into the turbine inlet conduit;flowing a first portion of the exhaust gas flow into the turbine volute conduit and an adjacent, second portion of the exhaust gas flow into a EGR conduit via the turbine volute inlet and the EGR conduit inlet, respectively, wherein the first portion and the second portion flowing through the turbine volute conduit and the EGR conduit are separated by a common wall separating the EGR conduit and the turbine volute conduit, the conduits being integrally formed;routing the second portion of exhaust gas flow through the EGR conduit as exhaust to a location other than the engine intake manifold and the turbine wheel when the EGR valve is in the closed position; andselecting the first mode or the second mode while operating the engine. 9. The method of claim 8, wherein the EGR valve is a variable EGR valve switchable between the open position, the closed position and a plurality of partially open positions therebetween that define a corresponding plurality of partially open operating modes, and wherein the method further comprises selecting one of the plurality of partially open operating modes, and wherein in the first operating mode and the plurality of partially open operating modes, the second pressure is greater than the first pressure, thereby promoting a corresponding plurality of EGR flows into the engine intake conduit.
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이 특허에 인용된 특허 (23)
Pierpont David A., Dual flow turbine housing for a turbocharger in a divided manifold exhaust system having E.G.R. flow.
Küspert, Alfred; Schmid, Wolfram; Sumser, Siegfried, Internal combustion engine having an exhaust gas turbocharger and an exhaust gas recirculation system.
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