System and method of gas recirculation in an internal combustion engine
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02M-025/07
F02D-013/04
출원번호
US-0458257
(2003-06-11)
발명자
/ 주소
Yang, Zhou
Janak, Robb
Fuchs, Neil
출원인 / 주소
Diesel Engine Retarders, Inc.
대리인 / 주소
Collier Shannon Scott PLLC
인용정보
피인용 횟수 :
5인용 특허 :
3
초록▼
A gas recirculation system is disclosed for improving engine braking in an internal combustion engine having an intake valve, an exhaust valve, and a cylinder. The system includes an exhaust manifold operatively connected to the cylinder through the exhaust valve; an intake manifold operatively conn
A gas recirculation system is disclosed for improving engine braking in an internal combustion engine having an intake valve, an exhaust valve, and a cylinder. The system includes an exhaust manifold operatively connected to the cylinder through the exhaust valve; an intake manifold operatively connected to the cylinder through the intake valve; and a gas recirculation passage adapted to recirculate gas from the exhaust manifold to the intake manifold during an engine braking event.
대표청구항▼
1. A gas recirculation system for improving engine braking in an internal combustion engine having an intake valve, an exhaust valve, and a cylinder, said gas recirculation system comprising:an exhaust manifold operatively connected to the cylinder through the exhaust valve; an intake manifold opera
1. A gas recirculation system for improving engine braking in an internal combustion engine having an intake valve, an exhaust valve, and a cylinder, said gas recirculation system comprising:an exhaust manifold operatively connected to the cylinder through the exhaust valve; an intake manifold operatively connected to the cylinder through the intake valve; and a gas recirculation passage adapted to recirculate gas from said exhaust manifold to said intake manifold during an engine braking event. 2. The system of claim 1, further comprising means for controlling the flow of recirculated gas to the engine cylinder, said flow control means operatively connected to said exhaust manifold.3. The system of claim 2, wherein said flow control means comprises a turbocharger.4. The system of claim 2, wherein said turbocharger is selected from the group consisting of: a variable geometry turbocharger, a wastegated turbocharger, and a fixed geometry turbocharger.5. The system of claim 3, wherein said flow control means further comprises a flow control device located downstream of said turbocharger.6. The system of claim 5, wherein said flow control device is an exhaust brake operative between a fully open position and a fully closed position.7. The system of claim 2, further comprising a gas recirculation valve disposed in said gas recirculation passage.8. The system of claim 7, said gas recirculation valve operative between a fully open position and a fully closed position.9. The system of claim 7, said valve having a first position for selectively recirculating gas from said exhaust manifold to said intake manifold through said gas recirculation passage during the engine braking event, and a second position for directing gas through said flow control means.10. A method of improving engine braking using gas recirculation in an internal combustion engine having an intake valve, an exhaust valve, an intake manifold, an exhaust manifold, and a cylinder, said method comprising the steps of:providing a gas recirculation passage connecting the exhaust manifold to the intake manifold; and recirculating gas from the exhaust manifold to the intake manifold through the gas recirculation passage during an engine braking event. 11. The method of claim 10, further comprising the steps of:providing a valve disposed in the gas recirculation passage; and selectively operating the valve during the engine braking event. 12. The method of claim 11, wherein the step of operating the valve comprises the step of opening the valve during the engine braking event.13. The method of claim 12, further comprising the step of providing an external gas recirculation event.14. The method of claim 11, wherein the step of operating the valve comprises the step of closing the valve during the engine braking event.15. The method of claim 14, further comprising the step of providing an internal gas recirculation event.16. The method of claim 10, further comprising the step of using the recirculated gas to clean the intake manifold.17. A method of improving operation of an internal combustion engine based on at least one engine operating parameter, said method comprising the steps of:measuring the engine operating parameter; providing gas recirculation during at least two engine processes selected from the group consisting of: engine braking operation, cleaning operation, and positive power exhaust gas recirculation operation; and controlling the flow of the recirculated gas based on the value of the engine operating parameter. 18. A gas recirculation system for improving engine braking in an internal combustion engine having an intake valve, an exhaust valve, and a cylinder, said gas recirculation system comprising:an exhaust manifold operatively connected to the cylinder through the exhaust valve; an intake manifold operatively connected to the cylinder through the intake valve; a gas recirculation passage adapted to recirculate gas from said exhaust manifold to said intake manifold during an engine braking event; a turbocharger operatively connected to said exhaust manifold; and a flow control device located downstream of said turbocharger. 19. The system of claim 18, wherein said turbocharger is selected from the group consisting of: a variable geometry turbocharger, a wastegated turbocharger, and a fixed geometry turbocharger.20. The system of claim 18, wherein said flow control device comprises an exhaust brake operative between a fully open position and a fully closed position.21. The system of claim 18, further comprising a gas recirculation valve disposed in said gas recirculation passage.22. The system of claim 21, said gas recirculation valve operative between a fully open position and a fully closed position.23. The system of claim 21, said gas recirculation valve having a first position for selectively recirculating gas from said exhaust manifold to said intake manifold through said gas recirculation passage during the engine braking event, and a second position for directing gas through said turbocharger.
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이 특허에 인용된 특허 (3)
Gaertner Uwe,DEX ; Hoffman Michael,DEX, Internal combustion engine with a separately operable additional valve in the cylinder head and method of operating same.
Janak, Robb; Fuchs, Neil, Use of external exhaust gas recirculation ("EGR") to improve compression release braking and method for EGR valve and system cleaning.
Vorih, Joseph M.; Mossberg, Jeffrey; Vanderpoel, Richard; Ernest, Steven; Paterson, Guy; Schwoerer, John A.; Leitkowski, Edward T.; Brzoska, Andrew; Cosma, Gheorghe, Variable lost motion valve actuator and method.
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