Apparatus, system, and method for shaping a valve orifice
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16K-005/06
F16K-005/12
F16K-031/05
F02B-039/00
F02B-037/18
F16K-037/00
F02B-037/013
출원번호
US-0044933
(2008-03-08)
등록번호
US-8997353
(2015-04-07)
발명자
/ 주소
Dale, Adrian P.
Sujan, Vivek A.
출원인 / 주소
Cummins IP, Inc.
대리인 / 주소
Foley & Lardner LLP
인용정보
피인용 횟수 :
0인용 특허 :
6
초록▼
An apparatus, system, and method are disclosed for optimizing a valve orifice shape. According to one representative embodiment, a method includes determining a specified relationship between a valve position and an output characteristic, and determining an orifice profile. The method also includes
An apparatus, system, and method are disclosed for optimizing a valve orifice shape. According to one representative embodiment, a method includes determining a specified relationship between a valve position and an output characteristic, and determining an orifice profile. The method also includes determining a relationship of an orifice area to the output characteristic. Further, the method includes shaping an orifice in a valve based on the orifice profile and the specified relationship between the valve position and the output characteristic. According to the method, the valve should approximately exhibit the specified relationship.
대표청구항▼
1. A method for optimizing the cross-sectional shape of an enclosed flow-through passage formed in a rotary valve, the enclosed flow-through passage extending from an intake orifice on one side of the rotary valve to an outlet orifice on an opposite side of the rotary valve, wherein a cross-sectiona
1. A method for optimizing the cross-sectional shape of an enclosed flow-through passage formed in a rotary valve, the enclosed flow-through passage extending from an intake orifice on one side of the rotary valve to an outlet orifice on an opposite side of the rotary valve, wherein a cross-sectional shape and size of the enclosed flow-through passage are constant along the entire enclosed flow-through passage, the cross-sectional shape being defined by an orifice profile having a leading edge, a trailing edge, and opposing sidewalls extending between the leading and trailing edges, the method comprising: determining a linear relationship between a change in a position of the rotary valve and a change in an output characteristic;determining, via a calibration valve coupled to an engine, the orifice profile configured to produce the linear relationship; andshaping the cross-sectional shape of the enclosed flow-through passage in the rotary valve based on the orifice profile such that the rotary valve exhibits approximately the linear relationship, wherein the rotary valve produces a substantially uniform change in the output characteristic for a substantially uniform change in the position of the rotary valve, and wherein the output characteristic is a torque-speed of the engine. 2. The method of claim 1, wherein the output characteristic comprises a relative coverage of at least a portion of a torque-speed map. 3. The method of claim 1, wherein an area of the orifice profile comprises one of a projected exposed area (PEA) and an effective flow area (EFA). 4. The method of claim 3, wherein the area of the orifice profile comprises a PEA, and wherein determining the orifice profile comprises determining the output characteristic for the PEA from the calibration valve. 5. The method of claim 3, wherein the orifice area comprises an EFA, and wherein determining the orifice profile comprises determining the output characteristic for the EFA from a computational fluid dynamics model. 6. The method of claim 1, wherein shaping the orifice in a valve comprises shaping a closest physically realizable orifice in a valve. 7. The method of claim 1, wherein shaping the orifice in a valve comprises a best-fit triangular approximation. 8. The method of claim 1, wherein shaping the orifice in a valve comprises a best-fit approximation of easily-machined shapes. 9. The method of claim 1, wherein the shaped orifice comprises a first orifice, the method further comprising: determining a performance curve for the first orifice, the performance curve for the first orifice comprising an exhibited relationship between the valve position and the output characteristic for the first orifice;determining an improvement index for the first orifice based on the performance curve and the specified relationship; andgenerating a second orifice profile based on the improvement index and the orifice profile such that the second orifice profile exhibits an improved performance curve for the second orifice. 10. An apparatus comprising: a rotary valve coupled to an engine; andan enclosed flow-through passage formed in the rotary valve, the enclosed flow-through passage extending from an intake orifice on one side of the rotary valve to an outlet orifice on an opposite side of the rotary valve, wherein a cross-sectional shape and size of the enclosed flow-through passage are constant along the entire enclosed flow-through passage, wherein the cross-sectional shape of the enclosed valve orifice comprising a flow-through passage is defined by an orifice profile, the orifice profile configured to produce a linear relationship between a change in a position of the rotary valve and a change in a torque-speed of the engine such that the rotary valve produces a substantially uniform change in the torque-speed of the engine for a substantially uniform change in the position of the rotary. 11. The apparatus of claim 10, wherein the rotary valve comprises a barrel valve. 12. The apparatus of claim 10, wherein the orifice profile is shaped such that for every degree radius of turn of the valve a substantially uniform change in a fluid flow through the valve is achieved. 13. The apparatus of claim 10, wherein the orifice profile is shaped such that for every degree radius of turn of the valve a substantially uniform change in a torque-speed map is achieved. 14. The apparatus of claim 10, wherein the valve orifice comprises an orifice shape configured as a best-fit approximation of easily manufactured shapes. 15. The apparatus of claim 10, wherein the valve orifice comprises a best-fit triangle.
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이 특허에 인용된 특허 (6)
Booth Walter (East Hanover NJ) Levin Alan R. (Somerville NJ), Ball valve with controlled flow variation.
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