US5931391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid injection valve
Assignee: Denso Corp
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Filing: 1997-10-02
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Granted: 1999-08-03
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Expires: 2017-10-02
Abstract
Abstract A fluid injection valve includes a valve seat having a conical concave surface and a valve seat surface, a needle having an edge surface and an annular contact surface whose diameter is Ds, an orifice plate having a perforated surface disposed in a downstream portion at a distance h from the edge surface of the needle and at a distance H from valve seat surface. Thus, a fluid chamber is defined by the perforated surface of the orifice plate, the edge surface of the needle and the conical concave surface of the valve seat. The perforated surface has a plurality of first orifices having a diameter d on a first circle whose diameter is DH. The fluid chamber is formed to have the following relationships among the diameters Ds, DH, d and the distances h, H: 1.5<Ds/DH<6, h<1.5d, and H<4d.
Inventors
- 👤 Yasuhide Tani
- 👤 Yukio Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:08
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/04; F02M69/042; F02M69/044; F02M51/00; F02M51/06; F02M51/061; F02M51/0625; F02M51/0664; F02M51/0671; F02M61/00; F02M61/16; F02M61/18; F02M61/1853
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
171 words
A fluid injection valve including a valve seat having a conical concave surface and a valve seat surface, a needle having an edge surface and an annular contact surface whose diameter is Ds, an orifice plate having a perforated surface disposed in a downstream portion at a distance h from said edge surface of said needle and at a distance H from valve seat surface, thereby forming a fluid chamber with said perforated surface of said orifice plate, said edge surface of said needle and said conical concave surface of said valve seat, wherein: said perforated surface has a plurality of first orifices having a diameter d on a first circle whose diameter is DH, and said annular contact surface and said valve seat surface are inclined to said perforated surface to cause fluid to impinge on said perforated surface thereby forming a fuel flow alone said perforated surface to said first orifices; said diameters Ds, DH, d and said distances h, H have the following relationships: 1.5<Ds/DH<6, h<1.5d, and H<4d.
Claim 2
Dependent Claim
171 words
A fluid injection valve including a valve seat having a conical concave surface and a valve seat surface, a needle having an edge surface and an annular contact surface whose diameter is Ds, an orifice plate having a perforated surface disposed in a downstream portion at a distance h from said edge surface of said needle and at a distance H from valve seat surface, thereby forming a fluid chamber with said perforated surface of said orifice plate, said edge surface of said needle and said conical concave surface of said valve seat, wherein: said perforated surface has a plurality of first orifices having a diameter d on a first circle whose diameter is DH, and said annular contact surface and said valve seat surface are inclined to said perforated surface to cause fluid to impinge on said perforated surface thereby forming a fuel flow alone said perforated surface to said first orifices; said diameters Ds, DH, d and said distances h, H have the following relationships: 1.5<Ds/DH<6, h<1.5d, and H<4d.
Claim 3
Dependent Claim
21 words
A fluid injection valve as in claim 1, wherein: said first orifices are disposed on said first circle at equal intervals.
Claim 4
Dependent Claim
32 words
A fluid injection valve as in claim 1, wherein: each of said first orifices is inclined at an angle θ1 with respect to the center axis thereof to direct fluid radially outward.
Claim 5
Dependent Claim
169 words
A fluid injection valve including a valve seat having a conical concave surface and a valve seat surface, a needle having an edge surface and an annular contact surface whose diameter is Ds, an orifice plate having a perforated surface disposed in a downstream portion at a distance h from said edge surface of said needle and at a distance H from valve seat surface, thereby forming a fluid chamber with said perforated surface of said orifice plate, said edge surface of said needle and said conical concave surface of said valve seat, wherein: said perforated surface has a plurality of first orifices having a diameter d on a first circle whose diameter is DH, said diameters Ds, DH, d and said distances h, H have the following relationships: 1.5<Ds/DH<6, h<1.5d,and H<4d; said perforated surface further has a plurality of second orifices having a diameter d on a second circle outside said circle, and the diameter of said second circle is within the same relationships as said diameter DH.
Claim 6
Dependent Claim
169 words
A fluid injection valve including a valve seat having a conical concave surface and a valve seat surface, a needle having an edge surface and an annular contact surface whose diameter is Ds, an orifice plate having a perforated surface disposed in a downstream portion at a distance h from said edge surface of said needle and at a distance H from valve seat surface, thereby forming a fluid chamber with said perforated surface of said orifice plate, said edge surface of said needle and said conical concave surface of said valve seat, wherein: said perforated surface has a plurality of first orifices having a diameter d on a first circle whose diameter is DH, said diameters Ds, DH, d and said distances h, H have the following relationships: 1.5<Ds/DH<6, h<1.5d,and H<4d; said perforated surface further has a plurality of second orifices having a diameter d on a second circle outside said circle, and the diameter of said second circle is within the same relationships as said diameter DH.
Claim 7
Dependent Claim
25 words
A fluid injection valve as in claim 4, wherein: the number of said second orifices is the same as the number of said first orifices.
Claim 8
Dependent Claim
36 words
A fluid injection valve as in claim 5, wherein: each of said second orifices is inclined at an angle θ2 which is larger than said angle θ1 of said first orifice to direct fluid radially outward.
Claim 9
Dependent Claim
26 words
A fluid injection valve as in claim 4, wherein: the number of said second orifices is twice as many as the number of said first orifices.
Claim 10
Dependent Claim
36 words
A fluid injection valve as in claim 7, wherein: each of said second orifices is inclined at an angle θ2 which is larger than said angle θ1 of said first orifice to direct fluid radially outward.
Claim 11
Dependent Claim
31 words
A fluid injection valve as in claim 1, wherein: said edge surface of said needle and said perforated surface of said orifice plate are disposed substantially in parallel with each other.
Claim 12
Dependent Claim
31 words
A fluid injection valve as in claim 9, wherein: each of said first orifices is inclined at an angle with respect to the center axis thereof to direct fluid radially outward.
Claim 13
Dependent Claim
32 words
A fluid injection valve as in claim 1, wherein: said orifice plate has a thickness t, and said thickness t and said diameter d of said orifices have the following relationship: 0.5<t/d<1.
Claim 14
Dependent Claim
31 words
A fluid injection valve as in claim 11, wherein: each of said first orifices is inclined at an angle with respect to the center axis thereof to direct fluid radially outward.
Claim 15
Dependent Claim
15 words
A fluid injection valve as in claim 3, wherein said angle θ1 is about 15°.
Claim 16
Dependent Claim
31 words
A fluid injection valve as in claim 12, wherein: said edge surface of said needle and said perforated surface of said orifice plate are disposed substantially in parallel with each other.
Claim 17
Dependent Claim
15 words
A fluid injection valve as in claim 14, wherein: said angle θ1 is about 15°.
Claim 18
Dependent Claim
31 words
A fluid injection valve as in claim 13, wherein: said edge surface of said needle and said perforated surface of said orifice plate are disposed substantially in parallel with each other.
Claim 19
Dependent Claim
25 words
A fluid injection valve as in claim 16, wherein: said edge surface of said needle and said perforated surface of said orifice plate are flat.
Claim 20
Dependent Claim
129 words
A fluid injection valve including a valve seat having a conical concave surface and a valve seat surface, a needle having an edge surface and an annular contact surface whose diameter is Ds, an orifice plate having a perforated surface disposed in a downstream portion at a distance h from said edge surface of said needle and at a distance H from valve seat surface, thereby forming a fluid chamber with said perforated surface of said orifice plate, said edge surface of said needle and said conical concave surface of said valve seat, wherein: said perforated surface has a plurality of first orifices having a diameter d on a first circle whose diameter is DH, said diameters Ds, DH, d and said distances h, H have the following relationships:
Claim 21
Dependent Claim
129 words
A fluid injection valve including a valve seat having a conical concave surface and a valve seat surface, a needle having an edge surface and an annular contact surface whose diameter is Ds, an orifice plate having a perforated surface disposed in a downstream portion at a distance h from said edge surface of said needle and at a distance H from valve seat surface, thereby forming a fluid chamber with said perforated surface of said orifice plate, said edge surface of said needle and said conical concave surface of said valve seat, wherein: said perforated surface has a plurality of first orifices having a diameter d on a first circle whose diameter is DH, said diameters Ds, DH, d and said distances h, H have the following relationships:
Claim 22
Dependent Claim
70 words
5<Ds/DH<6, h<1.5d,and H<4d; each of said first orifices is inclined at an angle θ1 of about 15° with respect to the center axis thereof to direct fluid radially outward; said edge surface of said needle and said perforated surface of said orifice plate are disposed substantially in parallel with each other; and said edge surface of said needle is convex and said perforated surface of said orifice plate is concave.
Claim 23
Dependent Claim
70 words
5<Ds/DH<6, h<1.5d,and H<4d; each of said first orifices is inclined at an angle θ1 of about 15° with respect to the center axis thereof to direct fluid radially outward; said edge surface of said needle and said perforated surface of said orifice plate are disposed substantially in parallel with each other; and said edge surface of said needle is convex and said perforated surface of said orifice plate is concave.
Claim 24
Dependent Claim
17 words
A fluid injection valve as in claim 1, wherein: said diameter d is smaller than 0.3 mm.
Claim 25
Dependent Claim
17 words
A fluid injection valve as in claim 1, wherein: said diameter d is smaller than 0.25 mm.
Claim 26
Dependent Claim
139 words
A fluid injection valve comprising: a reciprocatable valve member which seats in one position on an annular contact surface of diameter Ds; a perforated orifice plate disposed downstream at a distance H from the annular contact surface and at a distance h from the valve member when it is in an open position; said perforated orifice plate having a plurality of orifices therethrough with a diameter d disposed on a circular locus of diameter DH; said contact surface being disposed on a valve seat surface which is inclined inwardly downstream thereof but along a path which, if fully extended, intersects said orifice plate outside said plurality of orifices so as to influence fluid flows along the orifice plate inwardly toward the orifices; and wherein said dimensions Ds, DH, d, h and H have the following relationships: 1.5<Ds/DH<6, h<1.5d,and H<4d.
Claim 27
Dependent Claim
139 words
A fluid injection valve comprising: a reciprocatable valve member which seats in one position on an annular contact surface of diameter Ds; a perforated orifice plate disposed downstream at a distance H from the annular contact surface and at a distance h from the valve member when it is in an open position; said perforated orifice plate having a plurality of orifices therethrough with a diameter d disposed on a circular locus of diameter DH; said contact surface being disposed on a valve seat surface which is inclined inwardly downstream thereof but along a path which, if fully extended, intersects said orifice plate outside said plurality of orifices so as to influence fluid flows along the orifice plate inwardly toward the orifices; and wherein said dimensions Ds, DH, d, h and H have the following relationships: 1.5<Ds/DH<6, h<1.5d,and H<4d.
Claim 28
Dependent Claim
36 words
A fluid injection valve as in claim 21 wherein said orifices have respective axes that are inclined outwardly with respect to a center axis of the valve so as to direct fuel flows therethrough radially outward.
Claim 29
Dependent Claim
70 words
A fluid injection valve as in claim 21 wherein: said perforated plate has a further plurality of orifices having a diameter d disposed on a further circular locus of diameter DH' outside that of the earlier-recited orifices but where the further circular locus of diameter DH' still satisfies the relationship 1.5<Ds/DH'<6 and is still disposed inwardly of the intersection of the orifice plate with the extended downstream valve seat surface.
Claim 30
Dependent Claim
37 words
A fluid injection valve as in claim 23 wherein all the orifices have respective axes that are inclined outwardly with respect to a center axis of the valve so as to direct fuel flows therethrough radially outward.
Claim 31
Dependent Claim
25 words
A fluid injection valve as in claim 24 wherein the angle of inclination for said further orifices is greater than that for the earlier-recited orifices.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-08-02 | 2003-02-01 | 2003-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-02 | 2007-02-01 | 2007-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-02 | 2011-02-01 | 2011-08-03 | $7700.00 | Window Closed / Lapsed |