US3680794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetically operated fuel injection valve
Assignee: Robert Bosch GmbH
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Filing: 1971-07-26
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Granted: 1972-08-01
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Expires: 1991-07-26
Abstract
Abstract An electromagnetically operated fuel injection valve wherein the orifice of the injection nozzle discharges fuel into an atomizing chamber having an outlet which is co-axial with the orifice and is in direct communication with the intake manifold of an internal combustion engine. The chamber is defined by a cylindrical inner sleeve having one or more tangential openings for admission of air which atomizes the fuel in the chamber prior to entry into the manifold. The quantity of air admitted by way of the opening or openings amounts to between one-third and onehalf of the quantity required by the engine during idling. The inner sleeve is surrounded by an outer sleeve which defines therewith an air-filled compartment in communication with the opening or openings of the inner sleeve.
Inventors
- 👤 Peter Romann
- 👤 Heinrich Knapp
- 👤 Paul Fussner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:02
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/04; F02M69/047; F02M51/00; F02M51/06; F02M51/061; F02M51/0625; F02M51/0664; F02M51/0671; F02M51/0675; F02M51/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
182 words
In an electromagnetically operated valve for injection of fuel into the intake manifold of an internal combustion engine, a combination comprising a body including a nozzle having a fueldischarging orifice; a valve member having a portion movable with reference to said orifice between an opening position and a sealing position; means for biasing said portion of said valve member to said sealing position; an enclosure connected with said body and defining an atomizing chamber outwardly adjacent to said orifice to receive a predetermined quantity of fuel in response to movement of said portion of said valve member to said opening position, said enclosure having an outlet for atomized fuel positioned in at least substantial axial alignment with and spaced from said orifice and at least one air-admitting opening extending substantially at right angles to the axis of and radially spaced from said orifice; and means for supplying to said opening a current of air to atomize the fuel which is admitted into said chamber by way of said orifice before the thus atomized fuel leaves said chamber by way of said outlet.
Claim 2
Dependent Claim
182 words
In an electromagnetically operated valve for injection of fuel into the intake manifold of an internal combustion engine, a combination comprising a body including a nozzle having a fueldischarging orifice; a valve member having a portion movable with reference to said orifice between an opening position and a sealing position; means for biasing said portion of said valve member to said sealing position; an enclosure connected with said body and defining an atomizing chamber outwardly adjacent to said orifice to receive a predetermined quantity of fuel in response to movement of said portion of said valve member to said opening position, said enclosure having an outlet for atomized fuel positioned in at least substantial axial alignment with and spaced from said orifice and at least one air-admitting opening extending substantially at right angles to the axis of and radially spaced from said orifice; and means for supplying to said opening a current of air to atomize the fuel which is admitted into said chamber by way of said orifice before the thus atomized fuel leaves said chamber by way of said outlet.
Claim 3
Dependent Claim
37 words
A combination as defined in claim 1, wherein said outlet communicates with the intake manifold of the engine so that said opening admits into said chamber air in response to a drop in pressure in said manifold.
Claim 4
Dependent Claim
41 words
A combination as defined in claim 2, wherein said enclosure is provided with a plurality of at least substantially equidistant air-admitting openings each of which is radially spaced from and extends substantially at right angles to the axis of said orifice.
Claim 5
Dependent Claim
39 words
A combination as defined in claim 2, wherein the cross-sectional area of said opening is such that the quantity of air admitted by way of said opening is a fraction of the quantity required by the engine during idling.
Claim 6
Dependent Claim
32 words
A combination as defined in claim 4, wherein the quantity of air admitted by way of said opening is between one-third and one-half of the quantity required by the engine during idling.
Claim 7
Dependent Claim
26 words
A combination as defined in claim 1, wherein said enclosure has a substantially cylindrical internal surface and said opening is substantially tangential to said internal surface.
Claim 8
Dependent Claim
19 words
A combination as defined in claim 6, wherein said internal surface is coaxial with said orifice and said outlet.
Claim 9
Dependent Claim
31 words
A combination as defined in claim 1, wherein said air supplying means comprises a second enclosure surrounding said first mentioned enclosure and defining therewith an air-filled compartment communicating with said opening.
Claim 10
Dependent Claim
35 words
A combination as defined in claim 1, wherein said enclosure extends directly into an opening of the intake manifold in the engine so that atomized fuel leaving said outlet enters the interior of such manifold.
Claim 11
Dependent Claim
49 words
A combination as defined in claim 1, wherein said biasing means comprises a spring bearing against said valve member and reacting against said body, and further comprising electromagnet means provided in said body and energizable to move said portion to said opening position against the action of said spring.
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |