US3784330A - Fuel injection apparatus for gas turbine-type vehicle power plant - Google Patents

Fuel injection apparatus for gas turbine-type vehicle power plant Download PDF

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Publication number
US3784330A
US3784330A US00244671A US3784330DA US3784330A US 3784330 A US3784330 A US 3784330A US 00244671 A US00244671 A US 00244671A US 3784330D A US3784330D A US 3784330DA US 3784330 A US3784330 A US 3784330A
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United States
Prior art keywords
fuel
pressure
valve
section
cross
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Expired - Lifetime
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US00244671A
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English (en)
Inventor
F Eheim
R Schwartz
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C9/00—Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
    • F02C9/26—Control of fuel supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/02—Liquid fuel
    • F23K5/14—Details thereof
    • F23K5/142—Fuel pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/02—Liquid fuel
    • F23K5/14—Details thereof
    • F23K5/147—Valves

Definitions

  • This invention relates to a continuously operating fuel injection apparatus for gas turbines which are used in particular in motor vehicles.
  • the fuel injection apparatus is of the type that has a continuously operating fuel injection pump and a device for the regulation of the injected fuel quantities.
  • the device varies the position of a control plunger which meters the fuel quantities admitted to the fuel injection nozzles. At the meter ing valve containing the control plunger there is ensured a constant pressure drop by providing a differential pressure valve in the fuel path.
  • the fuel injection apparatus is of the type that is provided with means for the rpm-dependent control of the fuel quantities, means for limiting the pressure within the hydraulic system and means for protecting the fuel injection apparatus against runaway rpms and excessive temperatures.
  • the fuel injection apparatus is also provided with an electromagnetic system which varies the flow-passage section of the aforenoted fuel metering valve and which is directly connected with the control plunger and is disposed within the housing of the fuel injection apparatus.
  • the differential pressure regulated by the differential pressure valve may fluctuate in response to the different values of the fuel back pressure in the injection or pressure conduit leading to the injection nozzles. Consequently, the metered fuel quantities do no longer correspond exactly to the fuel quantities assigned to the prevailing operational conditions of the power plant.
  • the stationary valve seat of the differential pressure valve is so designed that its pressure cross section for any given opening cross section is smaller than in a conventional valve having a sole fuel flow opening.
  • the opening cross section is formed by the perimeter of the flow openings and the opening gap between the valve membrane and the frontal face of the stationary valve seat.
  • FIG. 1 is a longitudinal sectional view of the fuel injection apparatus incorporating the first embodiment of the invention
  • FIG. 2 is a sectional view on an enlarged scale of th component encircled at E in FIG. 1;
  • FIG. 3a is a view of the structure shown in FIG. 2 in the direction of arrow A;
  • FIG. 3b is a second embodiment of the invention taken in the same direction as FIG. 3a;
  • FIG. 3c is a view of a third embodiment of the invention taken in the same direction as FIG. 3a;
  • FIG. 3d is a view of a conventional valve configura tion taken in the same direction as FIG. 3a.
  • FIG. 1 there :is shown a regulator housing 1 containing a gear pump 3 which serves as a fuel injection pump and which is driven by a drive shaft 2.
  • the pump 3 delivers fuel through a bore 4 into an annular groove 5 of a sleeve 6. From the groove 5 the fuel flows through radial bores 7 into an annular chamber 8 which is bounded by a control plunger 11 and the internal wall of the sleeve bore 14.
  • the two control edges 12 of the control plunger 11 and the corresponding control slots 15 provided in the sleeve 6, form a metering valve.
  • the position of the control edges 12 with re spect to their associated control slots 15 defines a flow passage section 21 which is directly variable by means of a quantity setting device directly connected with the control plunger 11.
  • This device includes a rotary magnet 18 which is supported rotatably between two solenoids 19 which, in turn, are positioned on a core 20. In this manner a closed magnetic circuit may be established through the rotary magnet 18 and the core 20.
  • the rotary magnet 18 is secured to the control plunger 11 which is prevented from moving axially by a set screw 24 urging the control plunger 11 into engagement with an abutment 25 which, in turn, is biased by a spring 26 held in a lid 27.
  • control plunger 11 On the control plunger 11 there is also mounted a cam disc 30 which, as a function ofthe angular position of the control plunger 11, actuates a follower 31 of a position sensor 32 which may be an inductive transducer.
  • the fuel metered at the control slots 15 flows through an annular groove 16 provided in the sleeve 6 and a channel 34 into a chamber 35 of a differential pressure valve generally indicated at 36.
  • the latter is formed as a flat seat valve and is provided with a membrane 37 clamped coplanar with a stationary valve seat 39 between the regulator housing 1 and a valve housing 38.
  • the valve housing 38 supports, through an intermediate ring 40, a coil spring 41 which has a flat spring characteristic.
  • the spring 41 biases the membrane 37 through a spring seat disc 42 in the opening direction; consequently, the differential pressure valve 36 is in an open position when inoperative. From the annular groove 5 the fuel flows in an unthrottled manner through the bore 9 into a chamber 10 of the differential pressure valve 36.
  • fuel is delivered by the gear pump 3 to the metering valve l2, 15 where a metering is effected under conditions of constant pressure drop ensured by the differential pressure valve 36.
  • the flow passage section 21 is a measure for the throughgoing fuel quantities.
  • FIG. 2 there is shown, to an enlarged scale, details of the components encircled at E in FIG. 1 and FIG. 3a illustrates the stationary valve seat .39 as seen in the direction of the arrow A of FIG. 2.
  • the stationary valve seat 39 is' provided with flow openings 44, the perimeter of which, together with the opening clearance 47 between the frontal face 46 of the stationary valve seat 39 and the membrane 37, constitutes the opening cross section of the valve 36.
  • the individual cross sections of the four bores 44 form together the pressure cross section through which the fuel back pressure prevailing in the injection conduit 45 exerts a force on the membrane 37 of the differential pressure valve 36.
  • FIG. 3b there is shown a further embodiment of the invention formed of a stationary valve seat 39 having three bores 50 of identical cross section.
  • FIG. 30 there is shown a third embodiment wherein the stationary valve seat 39" is provided two rectangular openings 51 of identical cross section.
  • FIG. 3d illustrates a conventional valve configuration wherein the valve is formed by a stationary valve seat 39" having a single axial central bore 52.
  • FIGS. 3a, 3b, 3c and 3d have the same opening cross section.
  • the embodiments shown in FIGS. 3a, 3b and 30 have, however, a substantially smaller pressure cross section than that of the conventional valve configuration shown in FIG. 3d and formed by the sole bore 52.
  • the pressure cross section in the three embodiments is the sum of individual cross sections of the openings 44, 50 or 51.
  • a continuously operating fuel injection apparatus that is associated with a turbine-type vehicle power plant and is of the known type that has (a) a fuel metering valve including a displaceable control plunger which, dependent upon its position, meters fuel quantities delivered through pressure conduit means to fuel injection nozzles, (b) a device operatively connected to said c'ontrol plunger for varying the position thereof and (c) a differential pressure valve positioned in the path of the fuel and communicating with said fuel metering valve to ensure a constant pressure drop therethrough independently of the metered fuel quantities, the improvement in said differential pressure valve having a given opening cross section, comprising A. a first chamber in communication with said fuel path immediately upstream of the location of metering in said fuel metering valve,
  • a membrane separating said chambers from one another and moving in response to the pressure difference in said chambers and D. a stationary flat valve seat disposed in said pressure conduit means and cooperating with said membrane to regulate the flow of fuel from said second chamber to said pressure conduit means as a function of the pressure difference in said chambers, said flat valve seat having a plurality of throughgoing flow openings to establish communication between said second chamber and said pressure conduit means in an open position of said differential pressure valve, said flow opening being dimensioned to retain said given opening cross section and decrease the pressure cross section of said valve seat for reducing the effect of the back pressure of fuel in said pressure conduit means on said membrane.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
US00244671A 1971-04-24 1972-04-17 Fuel injection apparatus for gas turbine-type vehicle power plant Expired - Lifetime US3784330A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2120112A DE2120112C3 (de) 1971-04-24 1971-04-24 Kraftstoffeinspritzanlage für Fahrzeuggasturbinen

Publications (1)

Publication Number Publication Date
US3784330A true US3784330A (en) 1974-01-08

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ID=5805808

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Application Number Title Priority Date Filing Date
US00244671A Expired - Lifetime US3784330A (en) 1971-04-24 1972-04-17 Fuel injection apparatus for gas turbine-type vehicle power plant

Country Status (10)

Country Link
US (1) US3784330A (forum.php)
BR (1) BR7202464D0 (forum.php)
CS (1) CS164212B2 (forum.php)
DD (1) DD99837A6 (forum.php)
DE (1) DE2120112C3 (forum.php)
ES (1) ES401993A1 (forum.php)
FR (1) FR2134449B2 (forum.php)
GB (1) GB1390368A (forum.php)
IT (1) IT1045132B (forum.php)
SE (1) SE418414B (forum.php)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4364362A (en) * 1980-01-24 1982-12-21 Robert Bosch Gmbh Metering and distribution valve assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2233427B (en) * 1989-06-26 1992-12-23 Moog Inc Fluid flow control valve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2678057A (en) * 1951-01-18 1954-05-11 Lucas Ltd Joseph Liquid fuel regulating means for use with prime movers
US2846994A (en) * 1957-03-14 1958-08-12 Acf Ind Inc Fuel injection system
US3039272A (en) * 1958-11-13 1962-06-19 Union Carbide Corp Fluid actuating device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2678057A (en) * 1951-01-18 1954-05-11 Lucas Ltd Joseph Liquid fuel regulating means for use with prime movers
US2846994A (en) * 1957-03-14 1958-08-12 Acf Ind Inc Fuel injection system
US3039272A (en) * 1958-11-13 1962-06-19 Union Carbide Corp Fluid actuating device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4364362A (en) * 1980-01-24 1982-12-21 Robert Bosch Gmbh Metering and distribution valve assembly

Also Published As

Publication number Publication date
SE418414B (sv) 1981-05-25
DE2120112A1 (de) 1972-11-09
CS164212B2 (forum.php) 1975-11-07
ES401993A1 (es) 1975-03-16
SU442611A3 (ru) 1974-09-05
DD99837A6 (forum.php) 1973-08-20
IT1045132B (it) 1980-05-10
GB1390368A (en) 1975-04-09
FR2134449B2 (forum.php) 1977-12-23
DE2120112C3 (de) 1979-11-22
BR7202464D0 (pt) 1973-05-10
DE2120112B2 (de) 1979-03-29
FR2134449A2 (forum.php) 1972-12-08

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