EP1049869B1 - Dispositif pour produire un debit variable dans une alimentation en carburant - Google Patents

Dispositif pour produire un debit variable dans une alimentation en carburant Download PDF

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Publication number
EP1049869B1
EP1049869B1 EP99960884A EP99960884A EP1049869B1 EP 1049869 B1 EP1049869 B1 EP 1049869B1 EP 99960884 A EP99960884 A EP 99960884A EP 99960884 A EP99960884 A EP 99960884A EP 1049869 B1 EP1049869 B1 EP 1049869B1
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EP
European Patent Office
Prior art keywords
shaft
inlet
groove
grooves
aperture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99960884A
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German (de)
English (en)
Other versions
EP1049869A1 (fr
Inventor
Hinrich KRÜGER
Martin Werner
Eckbert Zander
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1049869A1 publication Critical patent/EP1049869A1/fr
Application granted granted Critical
Publication of EP1049869B1 publication Critical patent/EP1049869B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/361—Valves being actuated mechanically
    • F02M59/362—Rotary valves
    • F02M59/363—Rotary valves arrangements for adjusting the rotary valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/02—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements
    • F02M41/06—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements the distributor rotating
    • F02M41/063—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements the distributor rotating the distributor and rotary valve controlling fuel passages to pumping elements being combined
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/205—Quantity of fuel admitted to pumping elements being metered by an auxiliary metering device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/361—Valves being actuated mechanically
    • F02M59/362—Rotary valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails

Definitions

  • the invention relates to a device for generating a variable volume flow with a fuel supply, in particular for use in common rail injection systems.
  • Common rail injection systems require that Convey and compress fuel from a tank compressed fuel in a rail Provide pressure accumulator for injection by injectors. The pressure in the rail and that of the rail by injection The amount of fuel withdrawn varies with the operating conditions of the motor.
  • Throttling is one way of limiting the inflow of the total volume flow supplied to the pump or the volume flow supplied to each individual displacement element.
  • Adjustable throttle valves are used which is proportional due to a change in the throttle cross section Allow change in volume flow.
  • the maximum Cross-section of the throttle valve is for the maximum volume flow designed at full load and rated speed.
  • Throttle valve for a maximum volume flow of 1500 ml / min.
  • a speed of 300 rpm and the resulting maximum volume flow 150 ml / min are used to regulate between zero and full load only 10% of the control range of the throttle valve is used.
  • the object of the invention is a device for generating a variable volume flow with a fuel supply to be specified at which the flow is limited by a Inlet at everyone between idle speed and nominal speed speed to all required between zero and full load Volume flow is adjustable.
  • the advantage of the invention is that one for all pump speeds Constantly large adjustment range to influence the variable Volume flow is guaranteed. In addition, through ensuring an even distribution of the whole A small inflow to the individual displacement elements and even flow pulsation achieved. Finally is advantageous that the high pressure pump with a very low Form can be operated.
  • the invention particularly provides for each pump revolution a meterable, pre-measured volume of the conveyor elements to the high pressure pump. With the resulting variable degree of filling of the displacement elements results thus a variably adjustable between zero and full load Volume flow.
  • the setting of the filling level is decoupled from the speed of the high pressure pump. This has the consequence that the adjustment range for influencing the degree of filling for all speeds has the same size.
  • the dosage is done by varying the angle between Opening and closing the inlets on the individual cylinders angularly synchronous to the shaft and thus depending on the Position of the pistons of the high pressure pump. It is preferred the inlet to the cylinder of the high pressure pump is always in the area the top dead center of the piston open and at any Piston positions down to the area of bottom dead center closed.
  • the cylinders fill up with a defined, volume determining the degree of filling.
  • the shaft for example, has cams or eccentric also drives the pistons, a continuous inside Volume flow supplied by a pre-feed pump.
  • the volume flow is distributed through channels and external grooves.
  • a perforated sleeve is axially adjustable on the shaft arranged.
  • the shape of the grooves on the shaft and the breakthroughs in the sleeve are designed so that in Depending on the axial position of the sleeve different Opening and / or closing angle result.
  • the shape of the breakthroughs and grooves can also be interchanged his.
  • the shaft and sleeve are in a housing with others Channels for deriving the volume flow to the individual Cylinders.
  • inlet and outlet can also in any combination in the housing and / or the Be introduced wave, that is, both inlet and Drain are housed in the shaft or in the housing or that one of the two is in the housing and the other in the Shaft is located.
  • the axial displacement of the sleeve represents the Representation range that is the same for all speeds. For all speeds there can be between zero funding (no overlap of the grooves and breakthroughs during a complete Rotation of 360 °) and full funding (maximum phase length of the Coverage of 180 °, i.e. in the entire time in which the piston moves from top dead center to bottom dead center) work with the same adjustment range.
  • To change of the angle can be in relation to the shaft the closing time fixed and the opening time variable or opening time fixed and the closing time variable or both can be chosen variably.
  • the inlet can be closed the cylinder or cylinders at top dead center of the respective piston opened and at any piston position be closed until bottom dead center.
  • control slot instead of a single "control slot” in the same Also several “control slots” in the form of grooves, openings etc. on a sleeve, disc or cone or several Sleeves, disks or cones each with a “control slot” can be used to operate several pistons in parallel.
  • sliding sleeve and housing can be a combination in the same way made of sliding shaft and housing or a combination of shaft and sliding housing can be used.
  • shafts and / or sleeves and / or Housings also conical, disc-shaped or in other, suitably shaped body can be used.
  • Zuund can also in all embodiments Process can be interchanged. Otherwise meet the statements applicable to the sliding sleeves also for the other embodiments accordingly.
  • Another advantage of the metering of the feed according to the invention for each individual cylinder versus throttling of the total pump feed consists in the improvement of the even distribution of the inlet to the individual cylinders.
  • the even distribution over the individual cylinders is only from the agreement of the geometry and the arrangement dependent on the grooves and openings.
  • the necessary for this Geometric tolerances are significantly easier to maintain than, for example, the tolerances of the spring characteristics for identical inlet valves.
  • a high pressure pump 21 provided, the shaft of which via an eccentric 21d Piston 21a drives. In the same way can also several eccentrics or one or more cams are provided become.
  • the cylinder 21b also has intake and exhaust valves, respectively 21c.
  • the shaft 1 is from the high pressure pump 21 led out and comprises in its interior a channel 4, the communicates with a groove 5.
  • the groove 5 breaks through the axially extending lateral surface of the shaft 1.
  • Channel 4 is connected to the outlet of a prefeed pump 18 connected, the inlet via a filter 20 to a fuel tank 19 is connected.
  • the discharge of the high pressure pump 21 is connected to a rail 22 which is used to store the pressurized fuel is used and from there not shown injectors with the pressurized Fuel are supplied.
  • the inlet of the high pressure pump is connected to a channel 7, which is introduced into a housing 3 and is connected to a groove 8.
  • the housing 3 has a bore that the shaft 1 and a sleeve 2 enclosing the shaft 1. They don't co-rotating sleeve 2 is axially displaceable on the shaft arranged.
  • the groove 8 accommodated in the housing 3 and the groove 5 located in shaft 1 are arranged in such a way that they face each other. Between the two Grooves 5 and 8 are sleeves 2. Groove 8 can also extend over the entire circumference of the housing 3 extend. Alternatively, the groove 5 could over the extend the entire circumference of the shaft 1.
  • the breakthrough 6 in the sleeve 2 is designed so that depending opening and different from the axial position of the sleeve 2 Result in closing angle.
  • the exemplary embodiments relate relate to a high-pressure pump with three cylinders, so that the shaft 1 three grooves 5a, 5b, 5c and Sleeve 2 has three openings 6a, 6b, 6c.
  • the grooves 5a, 5b, 5c and the openings 6a, 6b, 6c are elongated Slots made.
  • the grooves 5a, 5b, 5c are step-shaped extending on the lateral surface of the shaft 1 in the axial direction arranged, d.
  • the grooves 5a, 5b, 5c are both both in the axial direction and in the circumferential direction a certain distance apart. Are against the openings 6a, 6b, 6c of the sleeve 2 in a particular Oriented angle between the circumferential direction and the axial direction and parallel to each other in the axial direction shifted and by a certain distance in the circumferential direction added.
  • the movement of the grooves 5a, 5b, 5c results from the rotation of the shaft in the circumferential direction and that of the Breakthroughs 6a, 6b, 6c from the adjustment of the sleeve in the axial Direction.
  • the angle (phase length) of the overlap of the groove 5a and the opening 6a changes.
  • the axial displacement of the sleeve 2 represents the adjustment range, which is the same for all speeds.
  • the use of straight grooves and slots results in a non-linear relationship between the axial displacement of the sleeve and the degree of filling of the displacement elements. The relationship is the same for all speeds between a minimum speed n min and a maximum speed n max .
  • the embodiments according to Figures 4 and 5 go from the Embodiments according to Figure 2 or 3 characterized by that the angle between the respective slit-shaped Groove 5g to 51 and the respective slot-shaped opening 6g to 61 is no longer positive but negative. apart corresponds to the positive or negative angle the embodiment of Figure 4 that of Figure 2 and the embodiment of Figure 5 of that of Figure 3.
  • In the directions of movement and adjustment shown in Figures 2 and 3 as well as orientations results in a more fixed Opening angle and a variable between 180 ° and 0 ° Closing angle.
  • the embodiments according to the figures 4 and 5 results in a variable opening angle and a fixed closing angle.
  • the grooves and openings formed as parallel slots.
  • an edge 10b of a groove or an opening is rotated as long until they are parallel to an edge 9a of an associated one Breakthrough or an associated groove lies. This only enlarges the one that is not throttling anyway Covering cross-section, but not the length of the Cover phase (angle).
  • Any form of breakthrough or the groove within the respective dashed lines shown triangle is possible.
  • the rear edge 9b of the groove or of the breakthrough around the bottom right corner be rotated until it is parallel to edge 10a.
  • any other form is conceivable here as long as it is within the associated dashed triangle.
  • FIG. 7 shows this a possible variant.
  • a groove or an opening 11 is doing so at a positive angle between 0 ° and 90 ° to one Breakthrough or a groove 12 arranged.
  • the opening or the groove 12 is a straight line Is slot, the groove or the opening 11th a serpentine shape. This can be used for this, for example to establish a linear relationship between the Adjustment path of the respective sleeve, not shown, and the To reach the filling level of the associated cylinder.
  • one positive angle between groove and breakthrough can also a negative angle and instead of the snake shape or the Slot shape any other shape used to to achieve a favorable connection in terms of control technology.
  • FIG. 8 Another embodiment of a metering device with a Dosage controlled via the phase length results if In addition to the outlet to the cylinders, the inlet from the Pre-feed pump fixed in the metering device housing becomes.
  • FIG. 8 On a shaft 13 there is one with the shaft 13 rotating, axially displaceable sleeve 17 in a housing. The inlet 14 from the pre-feed pump 18 and the outlet 15 to High-pressure pump 21 are introduced in a housing as fixed channels.
  • On the displaceable sleeve 17 there is one Groove 16 with at least one inclined edge 23.
  • the sleeve 17 can the angle between opening and Close and thus the phase length of the passage from the inlet 14 can be varied for the process 15.
  • the inclined edge 23 For location and orientation and the shape of the inclined edge 23 apply analogously to those made above Versions. For a better understanding is in Figure 8 the case omitted.
  • FIG Sleeve 17 can be omitted if the shaft is facing the housing is axially displaceable and the groove 16 with edge 23 in the shaft 13 is introduced.
  • a shaft 24 an approximately triangular groove 25 with an oblique edge 26.
  • a housing 27 for receiving the shaft 24 are an inlet 28 and an outlet 29 as radial in the end region on the shaft 24 directed channels introduced.
  • the shaft 24 is relative axially displaceable to the housing 27. The mode of operation corresponds doing so due to the same relative movement and Shape of the embodiment shown in Figure 8.
  • control slots described so far in the cylindrical Shafts or sleeves can also be in axial contact Discs, nested cones or other shapes Body incorporated.
  • one is open a shaft 30 attached or molded disc 31 with a the disk 31 in the direction parallel to the shaft axis penetrating breakthrough 32 is provided.
  • a parallel to Disc level forms a channel that can be moved in the radial direction the inlet 33 and is arranged such that it depending on its axial position meets the opening 32 or not.
  • a channel located parallel to the shaft axis as outlet 34 is stationary on the side opposite inlet 33 the disc 31 arranged such that for a given opening shape between drain 34 and breakthrough 32 the maximum possible overlap reached during one revolution of the shaft 30 becomes.
  • the inlet 33 is housed in a slide 35, which in turn is just like the shaft 30 which Disc 31 and the drain 34 are in a housing 36.
  • the breakthrough in the present embodiment is a shape enclosing the wave in a semicircle, the breakthrough increases with increasing disc angle radial direction expands.
  • any other suitable form can be used.
  • radial displacement of the slide 35 and thus the inlet 33 can in turn be the phase length of the overlap of inflow 33, drain 34 and disc 31 and thus the phase length of the open inlet to the conveyor elements can be varied.
  • the inlet and outlet can be accommodated together in the slide be, then instead of a breakthrough appropriately shaped groove is incorporated in the disc.
  • Figure 11 shows an embodiment with one on one Shaft 37 applied or molded on a conical base body, which is hereinafter referred to as cone 38.
  • Cone 38 is on the outer surface one with an oblique edge 40 provided groove 39 introduced with a to the base of the cone-leading channel 41 is connected.
  • the Mouth opening of the channel 41 in the area of the cone base has approximately the shape in the present embodiment with a semicircular opening around the shaft for example of constant width, the opening being designed in this way is that between a parallel to the shaft, fixed drain 42 and the opening the maximum overlap occurs.
  • An inlet 43 is integrated in a slide 44, the direction between the cone tip and the base is slidable along the lateral surface.
  • a housing 45 for receiving the shaft 37, the Cone 38, the outlet 42 and the slide 44 are provided.
  • the sequence can also be integrated into the slider and instead of a groove is provided for the opening.
  • Inlet and outlet can be interchanged. Also apply the statements made for the sliding sleeves for the remaining exemplary embodiments analog. Although in the embodiments of Figures 10 and 11 only a "control slot” is shown, several can in the same way “Control slots” in the form of grooves, openings, etc. on one Sleeve, disc or cone or several sleeves, discs or cones with one "control slot” each.
  • a characteristic curve to illustrate an exemplary relationship between the manipulated variable (for example displacement of the sleeve relative to the shaft) and volume flow V ⁇ is shown in FIG.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Claims (10)

  1. Dispositif pour créer un débit variable dans une alimentation en carburant, qui comprend:
    une pompe à haute pression (21) qui présente au moins une admission, au moins un cylindre (21 b), au moins un piston (21 a) qui peut s'y déplacer et un arbre (1) qui entraíne le piston (21a) ou les pistons, et
    un dispositif de dosage (2 à 8) qui est disposé dans l'admission ou dans les admissions de la pompe à haute pression (21), qui est synchronisé par rapport à l'arbre (1) et qui, lors de chaque rotation de l'arbre (1), admet un volume dosable de manière variable dans le cylindre (21 b) ou les cylindres, le dosage s'effectuant par modification de l'angle entre l'ouverture et la fermeture de l'admission ou des admissions.
  2. Dispositif selon la revendication 1, dans lequel le dispositif de dosage (2 à 8) présente des rainures (5a à 5l) de type en coulisseau rotatif et décalées les unes par rapport aux autres et/ou des perforations (6a à 6l) et dans lequel la modification de l'angle entre l'ouverture et la fermeture de l'admission ou des admissions s'effectue par modification de l'angle de superposition des rainures (5a à 5l) et/ou des perforations (6a à 6l) et/ou de la rainure et de la perforation.
  3. Dispositif selon la revendication 1 ou 2, dans lequel l'arbre (1) comprend :
    au moins un canal intérieur creux (4) auquel ou auxquels est apporté un débit continu de carburant,
    au moins une rainure (5) est installée dans l'arbre et est reliée au canal (4),
    un manchon (2) apte à coulisser axialement et doté d'au moins une perforation (6) étant disposé sur l'arbre (1),
    l'arbre (1) et le manchon (2) étant installés au moins en partie dans un boítier (3) et
    le boítier (3) présentant au moins un autre canal (7) de sortie du débit,
    la rainure ou les rainures ménagées dans l'arbre et la perforation ou les perforations ménagées dans le manchon étant configurées de telle sorte que la position axiale du manchon définit différents angles d'ouverture et de fermeture.
  4. Dispositif selon l'une des revendications 1 à 3, dans lequel les rainures (5a à 5l) et les perforations (6a à 6l) ont la forme de fentes rectilignes et dans lequel entre l'orientation de la rainure ou des rainures (5a à 5l) et l'orientation de la perforation ou des perforations, il existe une différence angulaire prédéterminée et différente de zéro.
  5. Dispositif selon l'une des revendications 1 à 3, dans lequel les rainures (5a à 5l) et les perforations (6a à 6l) sont configurées en fentes incurvées.
  6. Dispositif selon la revendication 1, dans lequel un corps de base (31) en forme de disque est relié à l'arbre (30), est installé dans un boítier (36) configuré de façon appropriée et présente au moins une rainure et/ou une perforation (32), un écoulement (33) et/ou une sortie (34) pouvant coulisser par rapport aux rainures et/ou à la perforation (32), la modification de l'angle entre l'ouverture et la fermeture de l'admission ou de la sortie s'effectuant par modification de l'angle de superposition de la rainure ou de la perforation (32) et de l'admission (33) et/ou de la sortie (34).
  7. Dispositif selon la revendication 1, dans lequel un corps de base (38) de forme conique est relié à l'arbre (37), lequel est installé dans un boítier (45) de forme appropriée et présente au moins une rainure et/ou une perforation (39), une admission (43) et/ou une sortie (42) pouvant coulisser par rapport à la rainure et/ou à la perforation (39) et la modification de l'angle entre l'ouverture et la fermeture de l'admission ou de la sortie s'effectuant par modification de l'angle de superposition de la rainure ou de la perforation (39) et de l'admission (43) et/ou de la sortie (42).
  8. Dispositif selon l'une des revendications précédentes, dans lequel l'admission et la sortie sont réalisés sous la forme de canaux fixes (14, 15) dans le boítier, le manchon (17) présentant au moins une rainure (16) dotée d'au moins un bord oblique (23).
  9. Dispositif selon l'une des revendications précédentes, dans lequel, pour modifier l'angle, le point d'ouverture est fixe et le point de fermeture est variable par rapport à l'arbre (1).
  10. Dispositif selon l'une des revendications précédentes, dans lequel l'admission au cylindre (21b) ou aux cylindres est ouverte dans la zone de chaque point mort haut du piston (21a) concerné et est fermée dans toute position quelconque du piston jusqu'à la zone du point mort bas.
EP99960884A 1998-11-25 1999-11-10 Dispositif pour produire un debit variable dans une alimentation en carburant Expired - Lifetime EP1049869B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19854509A DE19854509C2 (de) 1998-11-25 1998-11-25 Vorrichtung zum Erzeugen eines variablen Volumenstromes bei einer Kraftstoffzuführung
DE19854509 1998-11-25
PCT/DE1999/003581 WO2000031409A1 (fr) 1998-11-25 1999-11-10 Dispositif pour produire un debit variable dans une alimentation en carburant

Publications (2)

Publication Number Publication Date
EP1049869A1 EP1049869A1 (fr) 2000-11-08
EP1049869B1 true EP1049869B1 (fr) 2004-02-25

Family

ID=7889059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99960884A Expired - Lifetime EP1049869B1 (fr) 1998-11-25 1999-11-10 Dispositif pour produire un debit variable dans une alimentation en carburant

Country Status (4)

Country Link
US (2) US6293250B1 (fr)
EP (1) EP1049869B1 (fr)
DE (2) DE19854509C2 (fr)
WO (1) WO2000031409A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19952000C2 (de) * 1999-10-28 2001-08-16 Siemens Ag Vorrichtung zum Erzeugen eines variablen Volumenstroms für eine Pumpe
DE19951999B4 (de) * 1999-10-28 2004-11-18 Siemens Ag Einspritzanlage für eine Brennkraftmaschine
DE10029420B4 (de) * 2000-06-15 2006-05-04 Siemens Ag Vorrichtung zum Zuführen von Fluid zu einer Pumpe
US6596617B1 (en) 2000-06-22 2003-07-22 Progressant Technologies, Inc. CMOS compatible process for making a tunable negative differential resistance (NDR) device

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1429936A (en) * 1972-06-10 1976-03-31 Simms Group Research Dev Ltd Liquid fuel injection pumping apparatus
WO1980002183A1 (fr) * 1979-04-10 1980-10-16 A Takacs Dispositif de commande d'injection de combustible
US5058553A (en) * 1988-11-24 1991-10-22 Nippondenso Co., Ltd. Variable-discharge high pressure pump
DE3844363A1 (de) * 1988-12-30 1990-07-05 Bosch Gmbh Robert Elektrisch gesteuerte kraftstoffeinspritzpumpe
DE3927742A1 (de) * 1989-08-23 1991-02-28 Bosch Gmbh Robert Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
US5099814A (en) * 1989-11-20 1992-03-31 General Motors Corporation Fuel distributing and injector pump with electronic control
US5123393A (en) * 1991-09-04 1992-06-23 Stanadyne Automotive Corp. Timing control system for fuel injection pump
DE4141699A1 (de) * 1991-12-18 1993-07-01 Bosch Gmbh Robert Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
EP0643220B1 (fr) * 1993-09-14 1998-04-22 Lucas Industries Public Limited Company Système de carburant
GB9509609D0 (en) * 1995-05-12 1995-07-05 Lucas Ind Plc Fuel supply apparatus

Also Published As

Publication number Publication date
DE19854509C2 (de) 2000-11-23
EP1049869A1 (fr) 2000-11-08
US6293250B1 (en) 2001-09-25
WO2000031409A1 (fr) 2000-06-02
DE59908649D1 (de) 2004-04-01
DE19854509A1 (de) 2000-06-08
USRE38192E1 (en) 2003-07-22

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