IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0000569
(2007-12-13)
|
등록번호 |
US-7591240
(2009-10-20)
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발명자
/ 주소 |
|
출원인 / 주소 |
- Perkins Engines Company Limited
|
대리인 / 주소 |
Finnegan, Henderson, Farabow, Garrett & Dunner
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
24 |
초록
▼
A method for providing a mixture of inlet air and exhaust gas in a cylinder of an internal combustion engine is disclosed. Fluid flow between the cylinder and a cylinder head associated therewith is controlled by at least one rotary valve accommodated in the cylinder head. The method includes rotat
A method for providing a mixture of inlet air and exhaust gas in a cylinder of an internal combustion engine is disclosed. Fluid flow between the cylinder and a cylinder head associated therewith is controlled by at least one rotary valve accommodated in the cylinder head. The method includes rotating the at least one rotary valve to allow a fluid flow between the cylinder and the cylinder head in a first direction and to allow a fluid flow between the cylinder and the cylinder head in a second direction, opposite the first direction, wherein the fluid flow in the first direction and the fluid flow in the second direction are allowed during a single combustion cycle of the engine.
대표청구항
▼
What is claimed is: 1. A method for providing a mixture of inlet air and exhaust gas in a cylinder of an internal combustion engine, in which fluid flow between the cylinder and a cylinder head associated therewith is controlled by one or more rotary valves accommodated in the cylinder head, the me
What is claimed is: 1. A method for providing a mixture of inlet air and exhaust gas in a cylinder of an internal combustion engine, in which fluid flow between the cylinder and a cylinder head associated therewith is controlled by one or more rotary valves accommodated in the cylinder head, the method comprising: rotating the one or more rotary valves to allow a fluid flow between the cylinder and the cylinder head in a first direction and to allow a fluid flow between the cylinder and the cylinder head in a second direction, opposite the first direction, wherein the fluid flow in the first direction and the fluid flow in the second direction are allowed during a single combustion cycle of the engine; and successively overlapping at least two openings of one of the one or more rotary valves with a flow passage in the cylinder head during rotation of the one rotary valve; wherein the fluid flows in the first direction and the second direction are respectively allowed by at least partially overlapping at least two different openings with respective flow openings in the cylinder head, the at least two openings being defined in a curved portion of the one rotary valve, which curved portion is rotationally symmetric with respect to an axis of rotation of the one rotary valve; and wherein the at least two openings are rotationally offset from one another and define different flow areas. 2. The method of claim 1, including varying the speed of rotation of at least one of the one or more rotary valves to be higher during at least one of a beginning and an end of an overlapping event compared to an average speed of rotation of the at least one rotary valve. 3. The method of claim 1, including blocking fluid flow through the flow passage by the at least one rotary valve between the successive overlapping events. 4. The method of claim 1, including controlling the amount of fluid flow allowed to flow in the first direction to be different from the amount of fluid flow allowed to flow in the second direction. 5. The method of claim 1, wherein the speed of rotation of at least one of the one or more rotary valves is changed during a single rotation thereof. 6. The method of claim 5, wherein the speed of rotation at the time in which the fluid flow is allowed in the first direction is different from the speed of rotation at the time the fluid flow is allowed in the second direction. 7. The method of claim 1, wherein fluid flow in the first and the second directions is allowed during at least two valve opening events, respectively, wherein the two valve opening events are separated by a valve closing event. 8. The method of claim 1, wherein fluid flow in the first and the second directions is allowed during a singular valve opening event. 9. The method of claim 1, wherein the combustion cycle is a four stroke cycle, wherein fluid flow in the first direction is allowed while an intake stroke occurs in the cylinder and fluid flow in the second direction is allowed while an exhaust stroke occurs in the cylinder. 10. The method of claim 1, including controlling the amount of fluid flowing in the first direction to be larger than the amount of fluid flowing in the second direction. 11. The method of claim 1, including controlling the amount of fluid flowing in the first direction to be smaller than the amount of fluid flowing in the second direction. 12. The method of claim 1, including controlling fluid flow between the cylinder and a cylinder head associated therewith by at least two rotary valves accommodated in the cylinder head, a first rotary valve being arranged to control fluid flow between a first part of the cylinder head, fluidly connected to an air supply, and the cylinder and a second rotary valve being arranged to control fluid flow between the cylinder and a second part of the cylinder head, fluidly connected to an exhaust, the method comprising: rotating at least one of the first rotary valve and the second rotary valve to allow a fluid flow in a first direction between the cylinder and its respective part of the cylinder head and to allow a fluid flow in a second direction, opposite the first direction, between the cylinder and its respective part in the cylinder head wherein the fluid flow in the first direction and the fluid flow in the second direction are allowed during a single combustion cycle of the engine. 13. The method of claim 12, including varying the speed of rotation of the rotary valves to be higher during at least one of a beginning and an end of an overlapping event compared to an average speed of rotation of the rotary valves. 14. The method of claim 12, wherein two or more of the at least two rotary valves are accommodated in a common valve chamber; and wherein rotary valves accommodated in the common valve chamber are of the same shape, are aligned with respect to the direction of rotation thereof, and are synchronously rotated. 15. The method of claim 12, wherein two or more of the at least two rotary valves are accommodated in a common valve chamber; and wherein rotary valves accommodated in the common valve chamber are of the same shape, are offset with respect to the direction of rotation thereof, and are synchronously rotated. 16. The method of claim 12, wherein two or more of the at least two rotary valves are accommodated in a common valve chamber; and wherein rotary valves accommodated in the common valve chamber have different shapes. 17. The method of claim 12, wherein the rotary valves are rotated with different speeds.
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