US3567135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetically operated fuel injection valve
Assignee: Robert Bosch GmbH
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Filing: 1969-01-24
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Granted: 1971-03-02
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Expires: 1989-01-24
Abstract
Abstract An electromagnetically operated fuel injection valve wherein the armature has an annular sealing surface surrounded by an annular chamber and is normally biased against the rear side of a nozzle. The chamber receives fuel by way of one or more channels which extend from the peripheral surface of the armature toward the bottom surface of the channel so that their projections into the plane of the sealing surface are tangential to the chamber. This causes fuel which enters the chamber to circulate therein whereby the magnitude of the axial component of movement of the fuel determines the rate at which the fuel enters the orifice of the nozzle when the electromagnet is energized to retract the armature from the nozzle.
Inventors
- 👤 Horst Gebert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:56
CPC Classifications
F; F02; F02M; F02M61/00; F02M61/16; F02M61/162; F02M61/163; F02M51/00; F02M51/06; F02M51/061; F02M51/0625; F02M51/0664; F02M51/0667; F02M51/08; F02M2200/00; F02M2200/50; F02M2200/505
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
170 words
A valve, particularly for injection of fuel into the intake manifold of an internal combustion engine, comprising electromagnet means including a core and coil means surrounding said core; a nozzle located in front of and spaced from said core and having a planar rear face and a fluid-discharging orifice extending forwardly from said rear face; an armature installed between said core and said nozzle and having an annular planar sealing surface normally abutting against said planar rear face of said nozzle to seal said orifice from an annular chamber provided in said armature and surrounding said sealing surface, said chamber being in communication with said orifice in response to movement of said armature away from said nozzle on energization of said electromagnet means; and means for admitting fluid to said chamber, including at least one channel provided in said armature and being inclined inwardly toward and communicating with said chamber, the projection of said channel into the plane of said sealing surface being at least substantially tangential to said chamber.
Claim 2
Dependent Claim
170 words
A valve, particularly for injection of fuel into the intake manifold of an internal combustion engine, comprising electromagnet means including a core and coil means surrounding said core; a nozzle located in front of and spaced from said core and having a planar rear face and a fluid-discharging orifice extending forwardly from said rear face; an armature installed between said core and said nozzle and having an annular planar sealing surface normally abutting against said planar rear face of said nozzle to seal said orifice from an annular chamber provided in said armature and surrounding said sealing surface, said chamber being in communication with said orifice in response to movement of said armature away from said nozzle on energization of said electromagnet means; and means for admitting fluid to said chamber, including at least one channel provided in said armature and being inclined inwardly toward and communicating with said chamber, the projection of said channel into the plane of said sealing surface being at least substantially tangential to said chamber.
Claim 3
Dependent Claim
25 words
A valve as defined in claim 1, wherein said armature has a peripheral surface and said channel has a receiving end in said peripheral surface.
Claim 4
Dependent Claim
36 words
A valve as defined in claim 1, wherein said armature is reciprocable substantially without friction between said core and said nozzle, and further comprising guide means for guiding said armature during movement relative to said nozzle.
Claim 5
Dependent Claim
33 words
A valve as defined in claim 3, further comprising a housing for said electromagnet means and said armature, said guide means comprising a slitted leaf spring connected between said housing and said armature.
Claim 6
Dependent Claim
27 words
A valve as define in claim 4, further comprising flexible diaphragm means sealingly connected with said armature and said housing at one side of said leaf spring.
Claim 7
Dependent Claim
18 words
A valve as defined in claim 1, further comprising means for permanently biasing said armature against said nozzle.
Claim 8
Dependent Claim
31 words
A valve as defined in claim 6, wherein said biasing means comprises a helical spring operating between a centrally located portion Said armature and an adjusting member installed in said core.
Claim 9
Dependent Claim
28 words
A valve as defined in claim 1, further comprising a cap located in front of said nozzle and having a centrally located aperture in registry with said orifice.
Claim 10
Dependent Claim
19 words
A valve as defined in claim 8, wherein the diameter of said aperture exceeds the diameter of said orifice.
Claim 11
Dependent Claim
70 words
A valve as defined in claim 1, wherein the fluid admitted into said chamber by way of said channel is caused to circulate in said chamber and has a first component of movement in the circumferential direction and a second component of movement in the axial direction of said armature, said second component determining the rate at which fluid enters said orifice in response to energization of said electromagnet means.
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |