Engine systems and methods for operating an engine
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02B-033/44
F02M-025/07
F02C-006/12
F01D-009/02
F02M-026/43
F02B-037/02
F01N-013/10
출원번호
US-0717566
(2015-05-20)
등록번호
US-9752537
(2017-09-05)
우선권정보
GB-1409677.0 (2014-05-30)
발명자
/ 주소
Dale, Adrian P.
Dolton, Michael D.
Geckler, Samuel C.
McEwen, James Alexander
Sharp, Nicholas Kenneth
Garrett, Stephen Edward
Perfetto, Anthony Kyle
출원인 / 주소
Cummins Inc.
대리인 / 주소
Taft, Stettinius & Hollister LLP
인용정보
피인용 횟수 :
0인용 특허 :
15
초록▼
A unique engine system has an engine with a dedicated exhaust gas recirculation cylinder, an EGR system that receives exhaust gas from the dedicated cylinder, and a turbocharger having turbine inlet ports in fluid communication with other engine cylinders via a plurality of exhaust passages. At leas
A unique engine system has an engine with a dedicated exhaust gas recirculation cylinder, an EGR system that receives exhaust gas from the dedicated cylinder, and a turbocharger having turbine inlet ports in fluid communication with other engine cylinders via a plurality of exhaust passages. At least two of the exhaust passages are substantially isolated from each other. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for engines and engine systems.
대표청구항▼
1. An engine system, comprising: an internal combustion piston engine having a plurality of combustion cylinders, at least a first cylinder of which is a dedicated exhaust gas recirculation (EGR) cylinder;an EGR system operative to receive exhaust gas from the engine and direct at least a portion of
1. An engine system, comprising: an internal combustion piston engine having a plurality of combustion cylinders, at least a first cylinder of which is a dedicated exhaust gas recirculation (EGR) cylinder;an EGR system operative to receive exhaust gas from the engine and direct at least a portion of the exhaust gas to the plurality of combustion cylinders for intake during engine operation;a turbocharger having a turbine with a plurality of inlet ports to the turbine, wherein the inlet ports are adjacent to the turbine and are spaced apart from each along the turbine;a plurality of exhaust passages, including:a first exhaust passage fluidly coupling the dedicated EGR cylinder with the EGR system and operative to supply exhaust gases from the dedicated EGR cylinder to the EGR system;a second exhaust passage fluidly coupling, a second cylinder of the plurality of combustion cylinders to a first, inlet port of the plurality of inlet ports of the turbine;a third exhaust passage fluidly coupling a third cylinder of the plurality of combustion cylinders to a second inlet port of the plurality of inlet ports of the turbine, wherein the third exhaust passage is fluidly isolated from the second exhaust passage, the first exhaust passage is fluidly isolated from the turbine, and the first exhaust passage is fluidly isolated from the second and third exhaust passages; anda fourth exhaust passage fluidly coupling a fourth cylinder of the plurality of combustion cylinders to a third inlet port of the plurality of inlet ports of the turbine, wherein the fourth exhaust passage is fluidly isolated from the first, second, and third exhaust passages. 2. The engine system of claim 1, wherein the second and third exhaust passages are structured to separate pressure events originating in the second cylinder from pressure events originating in the third cylinder. 3. The engine system of claim 1, further comprising at least one passage including a valve, and with the valve open, the at least one passage is configured and operative to direct exhaust gases from the first exhaust passage to the turbocharger. 4. The engine system of claim 1, wherein the inlet ports are spaced apart from each other along the turbine in an axial direction. 5. The engine system of claim 1, wherein the inlet ports are spaced apart from each other along the turbine in a circumferential direction. 6. The engine system of claim 1, further comprising a wastegate valve operative to bleed exhaust gases from at least one of the second exhaust passage and the third exhaust passage. 7. An engine system, comprising: an EGR system;a turbocharger having a turbine; andan internal combustion piston engine having a first cylinder in fluid communication with the EGR system through a first exhaust passage; a second cylinder in direct fluid communication with the turbine through a second exhaust passage; and a third cylinder in fluid communication with the turbine through a third exhaust passage, wherein the first exhaust passage, the second exhaust passage, and the third exhaust passage are in fluid isolation from each other and the first exhaust passage is in fluid isolation from the turbine, and further comprising a fourth cylinder and a fourth exhaust passage and the fourth cylinder is in fluid communication with the turbine through the fourth exhaust passage, wherein the first, second, third and fourth exhaust passages are in fluid isolation from each other and each of the second, third and fourth exhaust passages is connected to the turbine with respective ones of first, second and third inlet ports to the turbine, and each of the first, second and third inlet ports includes a wastegate. 8. A method of operating an engine, comprising: delivering exhaust gases from a first cylinder of an internal combustion engine as dedicated EGR cylinder to an EGR system through a first exhaust passage;delivering exhaust gases from a second cylinder of the internal combustion engine to a first inlet port of a turbine of a turbocharger through a second exhaust passage;delivering exhaust gases from a third cylinder of the internal combustion engine to a second inlet port of the turbine through a third exhaust passage;delivering exhaust gases from a fourth cylinder of the internal combustion engine to a third inlet port of the turbine through a fourth exhaust passage; andfluidly isolating the exhaust gases in the second exhaust passage from the exhaust gases in the third exhaust passage prior to entry into the turbine, fluidly isolating the exhaust gases in the first exhaust passage from the turbine, and fluidly isolating the exhaust gases in the first exhaust passage from the exhaust gases in the second and third exhaust passages, wherein the exhaust gases in the fourth exhaust passage are fluidly isolated from the exhaust gases in the first, second and third exhaust passages.
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이 특허에 인용된 특허 (15)
Pierpont David A., Dual flow turbine housing for a turbocharger in a divided manifold exhaust system having E.G.R. flow.
Evans Duane E. (Peoria IL) Brown ; Jr. William L. (Peoria IL) Johnson Roger W. (Chillicothe IL), Exhaust gas recirculation system for turbo charged engines.
Serres, Nicolas; Ladonnet, Michael, Turbine assembly for a turbocharger, having two asymmetric volutes that are sequentially activated, and associated method.
Hittle, Craig Phillip; Kilkenny, Jonathan P.; Pierpont, David Andrew; Roozenboom, Stephan Donald, Turbocharger having balance valve, wastegate, and common actuator.
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