US5244154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perforated plate and fuel injection valve having a performated plate
Assignee: Robert Bosch GmbH
•
Filing: 1992-01-15
•
Granted: 1993-09-14
•
Expires: 2012-01-15
Abstract
Abstract A fuel injection valve including a perforated silicon plate disposed downstream of a valve seat and having an atomization opening that widens in the flow direction. The perforated silicon plate has at least one elongated recess on an upper end face oriented toward the valve seat face; this recess at least partly overlaps a metering opening extending as far as a lower face end of the perforated plate. The perforated plate makes it possible to form flat streams, so that very fine atomization of the injected fuel is attained. Forming the elongated recesses and atomization openings by etching makes high-precision manufacture possible at low production cost. The perforated plate and fuel injection valve are especially suitable for injection systems of mixture-compressing internal combustion engines with externally supplied ignition.
Inventors
- 👤 Juergen Buchholz
- 👤 Martin Maier
- 👤 Jiri Marek
- 👤 Hans-Peter Trah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:45
CPC Classifications
B; B05; B05B; B05B1/00; B05B1/02; B05B1/04; B05B1/048; B05B1/042; F; F02; F02M; F02M61/00; F02M61/16; F02M61/166; F02M61/18; F02M61/1853; Y; Y10; Y10S; Y10S239/00; Y10S239/19
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
147 words
A perforated plate of monocrystalline silicon including an upper face surface (35) and a lower face surface (31) with at least one elongated atomization opening, the perforated plate (23) has at least one elongated recess (39) formed in said upper face surface by etching, said at least one elongated recess forms an elongated cross section in a plane parallel with said upper surface of said perforated plate, said at least one elongated atomization opening (41) is formed in said lower face surface concentrically with said elongated recess (39) by etching with said at least one elongated recess overlapping said at least one elongated atomization opening (41), said at least one atomization opening extending from said lower face surface (31) of the perforated plate (23) toward said at least one elongated recess with the at least one elongated atomization opening perpendicular with said at least one elongated recess.
Claim 2
Dependent Claim
147 words
A perforated plate of monocrystalline silicon including an upper face surface (35) and a lower face surface (31) with at least one elongated atomization opening, the perforated plate (23) has at least one elongated recess (39) formed in said upper face surface by etching, said at least one elongated recess forms an elongated cross section in a plane parallel with said upper surface of said perforated plate, said at least one elongated atomization opening (41) is formed in said lower face surface concentrically with said elongated recess (39) by etching with said at least one elongated recess overlapping said at least one elongated atomization opening (41), said at least one atomization opening extending from said lower face surface (31) of the perforated plate (23) toward said at least one elongated recess with the at least one elongated atomization opening perpendicular with said at least one elongated recess.
Claim 3
Dependent Claim
51 words
A perforated plate as defined by claim 1, in which the at least one elongated recess (39), beginning at the upper face surface (35), and the at least one atomization opening (41), beginning at the lower face surface (31) of the perforated plate (23), are formed out by two-sided anisotropic etching.
Claim 4
Dependent Claim
26 words
A perforated plate as defined by claim 2, in which the at least one elongated recess (39) tapers in a direction toward the atomization opening (41).
Claim 5
Dependent Claim
26 words
A perforated plate as defined by claim 1, in which the at least one elongated recess (39) tapers in a direction toward the atomization opening (41).
Claim 6
Dependent Claim
29 words
A perforated plate as defined by claim 1, in which the at least one atomization opening (41) widens toward the lower face surface (31) of the perforated plate (23).
Claim 7
Dependent Claim
31 words
A perforated plate as defined by claim 1, in which the perforated plate (23) has two elongated recesses (39), disposed side by side, with one atomization opening (41) for each recess.
Claim 8
Dependent Claim
26 words
A perforated plate as defined by claim 1, in which the elongated recess (39) and the atomization opening (41) are embodied as concentric with one another.
Claim 9
Dependent Claim
25 words
A perforated plate as defined by claim 1, in which the elongated recess (39) and the atomization opening (41) are embodied asymmetrically to one another.
Claim 10
Dependent Claim
179 words
A perforated plate of monocrystalline silicon having at least one atomization opening, the perforated plate (23) from an upper face surface (35) of said perforated plate has at least one elongated recess (39) formed by etching, said at least one elongated recess partly overlaps a respective at least one atomization opening (41) formed out by etching and extending as far as a lower face surface (31) of the perforated plate (23), said at least one elongated recess (39) has two opposed long sides (45) extending in a direction of the atomization opening (41), said long sides include long edges (49) formed along the upper face surface (35) of the perforated plate (23), said long edges extend parallel to one another and parallel to a longitudinal axis (53) of the recess (39); said at least one atomization opening (41) is embodied as quadrilateral; and that the longitudinal axis (53) of the elongated recess (39) extends parallel to a diagonal line (67) of the quadrilateral atomization opening (41) that joins two opposed corners of the atomization opening (41) to one another.
Claim 11
Dependent Claim
179 words
A perforated plate of monocrystalline silicon having at least one atomization opening, the perforated plate (23) from an upper face surface (35) of said perforated plate has at least one elongated recess (39) formed by etching, said at least one elongated recess partly overlaps a respective at least one atomization opening (41) formed out by etching and extending as far as a lower face surface (31) of the perforated plate (23), said at least one elongated recess (39) has two opposed long sides (45) extending in a direction of the atomization opening (41), said long sides include long edges (49) formed along the upper face surface (35) of the perforated plate (23), said long edges extend parallel to one another and parallel to a longitudinal axis (53) of the recess (39); said at least one atomization opening (41) is embodied as quadrilateral; and that the longitudinal axis (53) of the elongated recess (39) extends parallel to a diagonal line (67) of the quadrilateral atomization opening (41) that joins two opposed corners of the atomization opening (41) to one another.
Claim 12
Dependent Claim
39 words
A perforated plate as defined by claim 9, in which the two opposed long sides (45) of the elongated recess (39) extend parallel to one another and perpendicular to the upper face surface (35) of the perforated plate (23).
Claim 13
Dependent Claim
46 words
A perforated plate as defined by claim 10, in which the long edges (49) of the long sides (45) have the greatest length of all the edges of the elongated recess (39) that are formed with the upper face surface (35) of the perforated plate (23).
Claim 14
Dependent Claim
26 words
A perforated plate as defined by claim 10, in which the at least one elongated recess (39) tapers in a direction toward the atomization opening (41).
Claim 15
Dependent Claim
45 words
A perforated plate as defined by claim 9, in which the long edges (49) of the long sides (45) have the greatest length of all the edges of the elongated recess (39) that are formed with the upper face (35) of the perforated plate (23).
Claim 16
Dependent Claim
26 words
A perforated plate as defined by claim 13, in which the at least one elongated recess (39) tapers in a direction toward the atomization opening (41).
Claim 17
Dependent Claim
26 words
A perforated plate as defined by claim 9, in which the at least one elongated recess (39) tapers in a direction toward the atomization opening (41).
Claim 18
Dependent Claim
133 words
A fuel injection valve for fuel injection systems of internal combustion engines, having a perforated plate that is disposed downstream of a valve seat face of a nozzle body of the fuel injection valve, said perforated plate has at least one quadrilateral atomization opening and is embodied of monocrystalline silicon, said perforated plate (23) has at least one elongated recess (39) formed by etching from an upper face surface (35) oriented toward the valve seat face (13), said at least one elongated recess partly overlaps a respective at least one quadrilateral atomization opening (41) formed out by etching and extending as far as a lower face surface (31) of the perforated plate (23), and said at least one recess forms an elongated cross section in a plane parallel to the upper face surface.
Claim 19
Dependent Claim
133 words
A fuel injection valve for fuel injection systems of internal combustion engines, having a perforated plate that is disposed downstream of a valve seat face of a nozzle body of the fuel injection valve, said perforated plate has at least one quadrilateral atomization opening and is embodied of monocrystalline silicon, said perforated plate (23) has at least one elongated recess (39) formed by etching from an upper face surface (35) oriented toward the valve seat face (13), said at least one elongated recess partly overlaps a respective at least one quadrilateral atomization opening (41) formed out by etching and extending as far as a lower face surface (31) of the perforated plate (23), and said at least one recess forms an elongated cross section in a plane parallel to the upper face surface.
Claim 20
Dependent Claim
30 words
A valve as defined by claim 16, in which the perforated plate (23) has two elongated recesses (39), disposed side by side, with one atomization opening (41) for each recess.
Claim 21
Dependent Claim
25 words
A valve as defined by claim 17, in which the elongated recess (39) and the atomization opening (41) are embodied as concentric with one another.
Claim 22
Dependent Claim
25 words
A valve as defined by claim 16, in which the elongated recess (39) and the atomization opening (41) are embodied as concentric with one another.
Claim 23
Dependent Claim
25 words
A perforated plate as defined by claim 16, in which the elongated recess (39) and the atomization opening (41) are embodied asymmetrically to one another.
Claim 24
Dependent Claim
220 words
A fuel injection valve for fuel injection systems of internal combustion engines, having a perforated plate that is disposed downstream of a valve seat face of a nozzle body of the fuel injection valve, said perforated plate has at least one atomization opening and is embodied of monocrystalline silicon, said perforated plate (23) has at least one elongated recess (39) formed by etching on one upper face surface (35) oriented toward the valve seat face (13), said at least one elongated recess partly overlaps at least one respective atomization opening (41) formed by etching and extending as far as a lower face surface (31) of the perforated plate (23), said at least one elongated recess (39) has two opposed long sides (45) extending in a direction of the at least one atomization opening (41), said long sides include long edges (49) formed along the upper face surface (35) of the perforated plate (23), the long edges extend parallel to one another and parallel to a longitudinal axis (53) of the recess (39); said at least one atomization opening (41) is embodied as quadrilateral; and that the longitudinal axis (53) of the elongated recess (39) extends parallel to a diagonal line (67) of the quadrilateral atomization opening (41) that joins two opposed corners of the atomization opening (41) to one another.
Claim 25
Dependent Claim
220 words
A fuel injection valve for fuel injection systems of internal combustion engines, having a perforated plate that is disposed downstream of a valve seat face of a nozzle body of the fuel injection valve, said perforated plate has at least one atomization opening and is embodied of monocrystalline silicon, said perforated plate (23) has at least one elongated recess (39) formed by etching on one upper face surface (35) oriented toward the valve seat face (13), said at least one elongated recess partly overlaps at least one respective atomization opening (41) formed by etching and extending as far as a lower face surface (31) of the perforated plate (23), said at least one elongated recess (39) has two opposed long sides (45) extending in a direction of the at least one atomization opening (41), said long sides include long edges (49) formed along the upper face surface (35) of the perforated plate (23), the long edges extend parallel to one another and parallel to a longitudinal axis (53) of the recess (39); said at least one atomization opening (41) is embodied as quadrilateral; and that the longitudinal axis (53) of the elongated recess (39) extends parallel to a diagonal line (67) of the quadrilateral atomization opening (41) that joins two opposed corners of the atomization opening (41) to one another.
Claim 26
Dependent Claim
38 words
A valve as defined by claim 21, in which the two opposed long sides (45) of the elongated recess (39) extend parallel to one another and perpendicular to the upper face surface (35) of the perforated plate (23).
Claim 27
Dependent Claim
45 words
A valve as defined by claim 22, in which the long edges (49) of the long sides (45) have the greatest length of all the edges of the elongated recess (39) that are formed with the upper face surface (35) of the perforated plate (23).
Claim 28
Dependent Claim
30 words
A valve as defined by claim 22, in which the perforated plate (23) has two elongated recesses (39), disposed side by side, with one atomization opening (41) for each recess.
Claim 29
Dependent Claim
25 words
A valve as defined by claim 22, in which the elongated recess (39) and the atomization opening (41) are embodied as concentric with one another.
Claim 30
Dependent Claim
25 words
A perforated plate as defined by claim 22, in Which the elongated recess (39) and the atomization opening (41) are embodied asymmetrically to one another.
Claim 31
Dependent Claim
45 words
A valve as defined by claim 21, in which the long edges (49) of the long sides (45) have the greatest length of all the edges of the elongated recess (39) that are formed with the upper face surface (35) of the perforated plate (23).
Claim 32
Dependent Claim
30 words
A valve as defined by claim 21, in which the perforated plate (23) has two elongated recesses (39), disposed side by side, with one atomization opening (41) for each recess.
Claim 33
Dependent Claim
25 words
A valve as defined by claim 21, in which the elongated recess (39) and the atomization opening (41) are embodied as concentric with one another.
Claim 34
Dependent Claim
25 words
A perforated plate as defined by claim 21, in which the elongated recess (39) and the atomization opening (41) are embodied asymmetrically to one another.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-09-13 | 1997-03-15 | 1997-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-13 | 2001-03-15 | 2001-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-13 | 2005-03-15 | 2005-09-14 | $7700.00 | Window Closed / Lapsed |