US3797235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection apparatus for automotive vehicles using gas turbine power plants
Assignee: Robert Bosch GmbH
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Filing: 1971-08-10
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Granted: 1974-03-19
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Expires: 1991-08-10
Abstract
Abstract In a fuel injection apparatus particularly adapted to be associated with a gas turbine constituting the power plant of an automotive vehicle, there is provided an electromagnetically operated fuel metering valve, the fuel quantity control member of which is directly connected with the armature of an electromagnet supplied with electric current as a function of independent (arbitrary) and dependent operational variables.
Inventors
- 👤 F Eheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:03
CPC Classifications
F; F02; F02C; F02C9/00; F02C9/26; F02C9/38
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
210 words
A fuel injection apparatus of the type that continuously delivers metered fuel to a fuel injection nozzle associated with a combustion chamber of a turbine power plant comprising, in combination, A. a housing, B. a fuel metering valve disposed in said housing and having 1. a variable flow passage section for the fuel flowing therethrough toward said nozzle, 2. a movable control plunger for varying said flow passage section, C. an electromagnetic fuel quantity control assembly disposed in said housing and directly connected to said control plunger to move the latter as a function of signals applied to said assembly, D. a differential pressure valve connected in hydraulic series with said fuel metering valve and having 1. a first means exposed to fuel pressure prevailing downstream of the fuel metering valve, 2. a second means exposed to the fuel pressure prevailing upstream of the fuel metering valve, 3. a flow passage section variable as a function of the difference between the pressures upstream and downstream of said fuel metering valve to maintain the pressure drop across said fuel metering valve and said flow passage section constant, and E. a fuel injection pump constinuously delivering fuel to said fuel injection nozzle through said fuel metering valve and said differential pressure valve.
Claim 2
Dependent Claim
210 words
A fuel injection apparatus of the type that continuously delivers metered fuel to a fuel injection nozzle associated with a combustion chamber of a turbine power plant comprising, in combination, A. a housing, B. a fuel metering valve disposed in said housing and having 1. a variable flow passage section for the fuel flowing therethrough toward said nozzle, 2. a movable control plunger for varying said flow passage section, C. an electromagnetic fuel quantity control assembly disposed in said housing and directly connected to said control plunger to move the latter as a function of signals applied to said assembly, D. a differential pressure valve connected in hydraulic series with said fuel metering valve and having 1. a first means exposed to fuel pressure prevailing downstream of the fuel metering valve, 2. a second means exposed to the fuel pressure prevailing upstream of the fuel metering valve, 3. a flow passage section variable as a function of the difference between the pressures upstream and downstream of said fuel metering valve to maintain the pressure drop across said fuel metering valve and said flow passage section constant, and E. a fuel injection pump constinuously delivering fuel to said fuel injection nozzle through said fuel metering valve and said differential pressure valve.
Claim 3
Dependent Claim
57 words
a movable control plunger for varying said flow passage section, C. an electromagnetic fuel quantity control assembly disposed in said housing and directly connected to said control plunger to move the latter as a function of signals applied to said assembly, D. a differential pressure valve connected in hydraulic series with said fuel metering valve and having
Claim 4
Dependent Claim
57 words
a movable control plunger for varying said flow passage section, C. an electromagnetic fuel quantity control assembly disposed in said housing and directly connected to said control plunger to move the latter as a function of signals applied to said assembly, D. a differential pressure valve connected in hydraulic series with said fuel metering valve and having
Claim 5
Dependent Claim
15 words
a second means exposed to the fuel pressure prevailing upstream of the fuel metering valve,
Claim 6
Dependent Claim
15 words
a second means exposed to the fuel pressure prevailing upstream of the fuel metering valve,
Claim 7
Dependent Claim
15 words
first lateral opening means communicating with said longitudinal bore to permit admission of fuel thereinto,
Claim 8
Dependent Claim
15 words
first lateral opening means communicating with said longitudinal bore to permit admission of fuel thereinto,
Claim 9
Dependent Claim
19 words
a yoke carrying said induction coil and having at least one toothed portion disposed radially adjacent said toothed disc.
Claim 10
Dependent Claim
19 words
a yoke carrying said induction coil and having at least one toothed portion disposed radially adjacent said toothed disc.
Claim 11
Dependent Claim
12 words
preloaded spring means urging said movable valve member into said second position,
Claim 12
Dependent Claim
12 words
preloaded spring means urging said movable valve member into said second position,
Claim 13
Dependent Claim
15 words
first lateral opening means communicating with said longitudinal bore to permit admission of fuel thereinto,
Claim 14
Dependent Claim
15 words
first lateral opening means communicating with said longitudinal bore to permit admission of fuel thereinto,
Claim 15
Dependent Claim
35 words
A fuel injection apparatus as defined in claim 1, wherein said electromagnetic fuel quantity control assembly includes a rotary armature affixed to said control plunger, said fuel metering valve includes A. a guide sleeve having
Claim 16
Dependent Claim
62 words
a flow passage section variable as a function of the difference between the pressures upstream and downstream of said fuel metering valve to maintain the pressure drop across said fuel metering valve and said flow passage section constant, and E. a fuel injection pump constinuously delivering fuel to said fuel injection nozzle through said fuel metering valve and said differential pressure valve.
Claim 17
Dependent Claim
62 words
a flow passage section variable as a function of the difference between the pressures upstream and downstream of said fuel metering valve to maintain the pressure drop across said fuel metering valve and said flow passage section constant, and E. a fuel injection pump constinuously delivering fuel to said fuel injection nozzle through said fuel metering valve and said differential pressure valve.
Claim 18
Dependent Claim
66 words
A fuel injection apparatus as defined in claim 2, wherein said means for rotatably supporting said control plunger includes A. point bearings at each end of said control plunger, B. spring means axially urging one of said bearings towards the other of said bearings and C. a setting screw for axially moving the other of said bearings to effect an axial adjustment of said control plunger.
Claim 19
Dependent Claim
65 words
second lateral opening means communicating with said longitudinal bore and constituting at least one control slot, B. means for rotatably supporting said control plunger and C. at least one oblique control edge provided on said control plunger and cooperating with said control slot to define said variable flow passage section, the magnitude of which being a function of the angular position of said control plunger.
Claim 20
Dependent Claim
65 words
second lateral opening means communicating with said longitudinal bore and constituting at least one control slot, B. means for rotatably supporting said control plunger and C. at least one oblique control edge provided on said control plunger and cooperating with said control slot to define said variable flow passage section, the magnitude of which being a function of the angular position of said control plunger.
Claim 21
Dependent Claim
37 words
electromagnetic means operatively connected to said movable valve member to apply thereto, when energized, a force greater than and opposite to that of said preloaded spring means for urging said movable valve member into said first position.
Claim 22
Dependent Claim
37 words
electromagnetic means operatively connected to said movable valve member to apply thereto, when energized, a force greater than and opposite to that of said preloaded spring means for urging said movable valve member into said first position.
Claim 23
Dependent Claim
56 words
second lateral opening means communicating with said longitudinal bore and constituting at least one control slot and B. at least one control edge provided on said control plunger and cooperating with said control slot to define said variable flow passage section, the magnitude of which being a function of the axial position of said control plunger.
Claim 24
Dependent Claim
56 words
second lateral opening means communicating with said longitudinal bore and constituting at least one control slot and B. at least one control edge provided on said control plunger and cooperating with said control slot to define said variable flow passage section, the magnitude of which being a function of the axial position of said control plunger.
Claim 25
Dependent Claim
61 words
A fuel injection apparatus as defined in claim 2, wherein said fuel metering valve includes A. means for limiting the maximum angular displacement of said control plunger and B. return spring means urging said control plunGer against the force of said electromagnetic fuel quantity control assembly into a position wherein said flow passage section of said fuel metering valve is zero.
Claim 26
Dependent Claim
54 words
A fuel injection apparatus as defined in claim 4, wherein said means for limiting the maximum angular displacement of said control plunger includes A. a cam disc affixed to said control plunger and including abutment faces and B. abutment means affixed to said housing and cooperating with the abutment faces of said cam disc.
Claim 27
Dependent Claim
44 words
A fuel injection apparatus as defined in claim 5, including a transducer disposed in said housing and having a follower member in continuous engagement with said cam disc, said transducer emitting an electric signal characterizing the actual momentary angular position of said control plunger.
Claim 28
Dependent Claim
30 words
A fuel injection apparatus as defined in claim 1, including means for exposing said electromagnetic fuel quantity control assembly to a direct contact with the flowing fuel for cooling purposes.
Claim 29
Dependent Claim
32 words
A fuel injection apparatus as defined in claim 1, including a transducer operatively connected to said control plunger to emit an electric signal characterizing the actual momentary position of said control plunger.
Claim 30
Dependent Claim
105 words
A fuel injection apparatus as defined in claim 1, including a rapid shut-off valve disposed upstream of said fuel injection pump, said rapid shut-off valve comprises A. a movable valve member adapted to assume an open and a closed position to respectively allow and prevent the flow of fuel to said fuel injection pump, B. preloaded spring means urging said movable valve member into said closed position, C. electromagnetic means operatively connected to said movable valve member to apply thereto, when energized, a force greater than and opposite to that of said preloaded spring means for urging said movable valve member into said open position.
Claim 31
Dependent Claim
20 words
A fuel injection apparatus as defined in claim 9, wherein said valve member is formed as an axially reciprocating plunger.
Claim 32
Dependent Claim
64 words
A fuel injection apparatus as defined in claim 1, including A. a fuel conduit carrying metered fuel to said fuel injection nozzle, B. a fuel tank, C. a return conduit leading to said fuel tank and D. a rapid shut-off valve disposed in said fuel conduit immediately upstream of said fuel injection nozzle and connected to said return conduit, said rapid shut-off valve comprises,
Claim 33
Dependent Claim
68 words
A fuel injection apparatus as defined in claim 1, including a shaft for driving said fuel injection pump from said power plant, said improvement further includes, within said housing, an inductive rpm sensor, having A. a toothed disc affixed to said shaft, B. two signal transmitters disposed diametrically oppositely with respect to said toothed disc and forming with said toothed disc a magnetic circuit, each signal transmitter having
Claim 34
Dependent Claim
59 words
A fuel injection apparatus as defined in claim 1, wherein said differential pressurE valve includes A. a membrane constituting a movable valve member and exposed to the fuel pressures upstream and downstream of said fuel metering valve and B. a flat valve seat cooperating directly with said membrane to vary said flow passage section of said differential pressure valve.
Claim 35
Dependent Claim
54 words
A fuel injection apparatus as defined in claim 1, wherein said differential pressure valve includes A. a membrane exposed to the fuel pressures upstream and downstream of said fuel metering valve and B. a control plunger affixed to said membrane and movable thereby to vary said flow passage section of said differential pressure valve.
Claim 36
Dependent Claim
36 words
A fuel injection apparatus as defined in claim 1, wherein said electromagnetic fuel quantity control assembly includes a linearly movable armature affixed to said control plunger, said fuel metering valve includes A. a guide sleeve having
Claim 37
Dependent Claim
49 words
A fuel injection apparatus as defined in claim 15, including a transducer disposed in said housing an having an axially displaceable follower member in contact and in axial alignment with said control plunger, said transducer emitting an electric signal characterizing the actual momentary axial position of said control plunger.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |