EP1273796A2 - Hochdruck-Kraftstoffpumpe, insbesondere für direkteinspritzende Brennkraftmaschine, sowie Kraftstoffsystem und Brennkraftmaschine - Google Patents
Hochdruck-Kraftstoffpumpe, insbesondere für direkteinspritzende Brennkraftmaschine, sowie Kraftstoffsystem und Brennkraftmaschine Download PDFInfo
- Publication number
- EP1273796A2 EP1273796A2 EP02009419A EP02009419A EP1273796A2 EP 1273796 A2 EP1273796 A2 EP 1273796A2 EP 02009419 A EP02009419 A EP 02009419A EP 02009419 A EP02009419 A EP 02009419A EP 1273796 A2 EP1273796 A2 EP 1273796A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- pump
- pressure
- fuel pump
- check valve
- 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.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
- F04B49/225—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
-
- 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
- F02M59/366—Valves being actuated electrically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0452—Distribution members, e.g. valves
Definitions
- the invention relates to a high-pressure fuel pump, especially for direct injection internal combustion engines, with a housing that has a low pressure inlet and has a high pressure outlet, with one in the housing existing pump room, which with the low pressure inlet and the high pressure outlet is connectable to one Control valve, which the pump chamber with the low pressure inlet can connect and to the low pressure inlet opens, and with a check valve with one of the Control valve separate valve element, which between Low pressure inlet and pump room is arranged and used Pump room opens.
- Such a high-pressure fuel pump is from DE 198 34 120 A1 known.
- This high pressure fuel pump is at Fuel supply systems with two in series Fuel pumps used. On the one hand branches off from the pump room a flow channel from which via a check valve leads to a low pressure inlet. On the other hand introduces another flow channel from the pump room to a control valve, which with another flow channel in the housing of the High pressure fuel pump is also connected to the Low pressure inlet leads.
- the pump chamber is on the outlet side also via a check valve with a high pressure outlet connected.
- the known high-pressure fuel pump is around a piston pump. To the high pressure outlet Being able to control the amount of fuel delivered can do that Control valve during a delivery stroke of the pump piston be opened. This makes the pump room Low pressure inlet open and no more fuel conveyed to the high pressure outlet.
- control valve could also be at the beginning of a Delivery stroke of the pump piston can be opened.
- the Control of the delivery rate by varying the However, funding has several advantages:
- control valve can be made simpler because the flow cross-section to be controlled is considerable can be made smaller. Because the pump piston mostly is driven by a drive cam, the falls Less load on the drive cam because the Delivery ended before top dead center of the pump piston (in the top dead center of the pump piston occurs due to of the small radius of curvature is the highest Hertzian pressure on). Finally, there is a cost advantage in that the control of the control valve via a Switching stage can take place.
- the object of the present invention is a high-pressure fuel pump of the type mentioned above further training that it builds overall easier and thus can be made cheaper.
- the inlet valve through which the fuel from the Low pressure inlet into the pump room during a suction stroke flows, and the control valve, which towards the end of a Delivery stroke of the pump piston opens into a common one Integrated unit.
- This unit can be assembled in advance become. Because of the better accessibility is a such assembly easier to perform, resulting in a Cost advantage, but also leads to an increase in quality.
- the housing according to the invention High pressure fuel pump only a few flow channels required because the common valve module for the Check valve and the control valve a common Has connection to the low pressure inlet. to Manufacture of the housing of the high pressure fuel pump are thus fewer processing steps required, which the Manufacturing costs for the high-pressure fuel pump according to the invention lowers.
- the elements of the Check valve and the elements of the control valve are arranged coaxially to one another in the valve module.
- a such an arrangement is particularly small. Beyond that with her the space available is particularly good exploited, so that especially for the check valve a large and therefore favorable flow cross section to achieve.
- the Control valve is located radially inside and the check valve comprises a plurality of flow channels, which are radial outside by at least a portion of the control valve in the Valve module are provided.
- the plurality of Flow channels become a comparatively large one Flow cross section created for the check valve, so that during a suction stroke of the pump piston rapid filling of the pump room is possible.
- the flow channels are preferably through connected an annulus.
- the control valve again lies at least radially with its valve element within the flow channels.
- the check valve comprises a disk-shaped valve element.
- Such one Valve element is just like the associated valve seat easy to manufacture.
- valve dynamics of the check valve are all the better the lower the mass of the valve element Check valve is. That will be the case with that training Taken into account, in which the valve element of the Check valve comprises a thin plate.
- the check valve can also be used as a double seat valve be trained. In this case there is already little Valve stroke a large flow cross-section is available.
- High-pressure fuel pump includes this Valve module towards the pump chamber at least one Support section on which a biasing element is supported, which the valve element of the check valve against the associated valve seat.
- the preload of the The biasing element is preferably just so strong that the valve element of the check valve already at one low pressure difference from the associated valve seat. If the support section, as suggested, is on Valve module arranged, the complete unit can Check valve and control valve are installed in advance, which further reduces the manufacturing costs.
- the invention also relates to a fuel system with a Fuel tank, with at least one fuel injection device, which put the fuel directly into the Injects combustion chamber of an internal combustion engine with at least one high pressure fuel pump, and one Fuel rail to which the fuel injector connected.
- Such a fuel system comes with internal combustion engines with direct fuel injection.
- the pressure in the fuel manifold, which is commonly called “Rail” is referred to by the high pressure fuel pump applied.
- the invention further relates to an internal combustion engine with at least one combustion chamber in which the fuel is injected directly.
- an internal combustion engine with at least one combustion chamber in which the fuel is injected directly.
- the high pressure fuel pump 10 comprises a housing 12, into which a stepped bore 14 is introduced. Transversal to the longitudinal axis of the Stepped bore 14 are also two in the housing 12 Flow channels 16 and 18 available.
- the upper in Fig. 1 Flow channel 16 leads to a low pressure inlet 20 for the fuel.
- the lower flow channel 18 in FIG. 1 leads to a high pressure outlet 22.
- a pump piston 26 guided axially movable.
- a valve housing 30 is used in an upper area 28 of the Stepped bore 14 in an upper area 28 of the Stepped bore 14. This is opposite the stepped bore 14 through an O-ring seal 32 sealed, which in an annular groove (without Reference numerals) inserted in the wall of the stepped bore 14 is.
- valve housing 30 In the valve housing 30 are a check valve 36 and a control valve 38 housed. On their exact Training is referred to in detail below.
- On the valve housing 30 is an actuation unit 40 placed.
- the actuator 40 is opposite Pump housing 12 sealed by an O-ring seal 42, into an annular groove (without reference number) in the top of the pump housing 12 is inserted.
- the actuation unit 40 is via screws (without reference number) on the pump housing 12 attached. Your task is detailed below explained.
- the attachment of the actuator 40 on Valve housing 30 is non-detachable via a flange 41 Actuator 40, the control valve 38, the Check valve 36 and valve housing 30 form together a valve module 44.
- the valve housing 30 has a cylindrical shape overall. It is centered in its longitudinal direction Stepped bore 46 passes through. In the stepped bore 46 is in 1 shows a rod-shaped valve element 48 from above introduced, which has a rounded end with a 1 lower region of the stepped bore 36 present Valve seat 50 works together. The valve element 48 and the valve seat 50 are part of the control valve 38.
- valve element 48 extends upward from the Valve housing 30 out into the actuation unit 40 into it.
- a cylindrical armature 52 is attached to valve element 48.
- a cover 56 closes the actuation unit 40 upwards down.
- annular magnet 86 is provided, which at a Current moves the armature 52 in Fig. 1 down, so that the valve element 48 is pressed into the valve seat 50 becomes.
- the stepped bore 46 forms below the valve seat 50 a flow channel 58 which opens into the pump chamber 34.
- the stepped bore 46 has one larger diameter than the valve element 48, so that a Valve chamber 60 is formed. This is over a majority of radially extending flow channels 62 with a circumferential groove 64 connected, which in the outer wall of the Valve housing 30 is introduced.
- the groove 64 is at the level of a expanded section 66 of the stepped bore 14 in Pump housing 12. This creates an annular space 68. From this branches to the low pressure inlet 20 Flow channel 16 already introduced above.
- the check valve 36 is constructed as follows: In the valve housing 30 extend from the circumferential groove 64 several substantially axial flow channels 70 obliquely downwards and somewhat radially inwards. In the case of FIG. 1 illustrated embodiment are a total of four in Arranged evenly distributed circumferential direction Flow channels 70 are provided, two of which are shown in FIG. 1 are visible. The flow channels 70 open into the Underside of the valve housing 30. The openings of the Flow channels 70 in the underside of valve housing 30 are surrounded by an annular valve seat 72. This consists of a coaxial to the valve housing 30 and radially inner ring web 72a and also for Valve housing 30 coaxial and radially outer ring web 72b.
- Compression spring 74 On the annular valve seat 72 on the underside of the Valve housing 30 is with little force from one Compression spring 74 is a disk-shaped valve element 76 pressed. With the disk-shaped valve element 76 it is a thin metal plate.
- the Compression spring 74 is supported on an axially extending annular support member 78 from. This is with his welded upper edge to the valve housing 30.
- the support member 78 On his in Fig. 1 lower end, the support member 78 has a on the radially inward ring web 80 on which the Compression spring 74 is present.
- On the disc-shaped Valve element 76 of the check valve 36 are over the Radial recesses 82 are distributed circumferentially. in the Support element 78 are corresponding, not in the figure visible openings provided.
- the elements of the check valve 36 that is A plurality of axial flow channels 70 and annular Valve seats 72, the compression spring 74, the disc ring-shaped Valve element 76 and the support element 78, coaxial to the Elements of the control valve 38, in particular the Stepped bore 46 in the valve housing 30, the valve element 48 and the valve seat 50.
- the circumferential groove 64 has a common connection of the check valve 36 and the control valve 38 for Low pressure inlet forms.
- a check valve 84 mentioned which in the lower Flow channel 18 between the pump chamber 34 and the High pressure outlet 22 is present.
- this Check valve 84 is a normal one spring-loaded ball valve leading to the high pressure outlet 22 opens.
- the high pressure fuel pump 10 operates as follows (see also Fig. 2-6; it should be noted that in particular in FIGS. 2-4 for reasons of illustration not all parts and reference numerals are shown; Furthermore, the control valve 38 and check valve 36 in one of FIG. 1 different orientation with respect to the longitudinal axis of the Piston 26 shown):
- the Pump piston 26 driven by a cam 88, which on a clockwise rotating shaft 90 is attached.
- the shaft 90 is directly from a crankshaft of an associated internal combustion engine driven.
- the high pressure fuel pump 10 moves Pump piston 26 down (suction stroke, see Fig. 5). This increases the pump space 34.
- the pressure in the Pump chamber 34 is in this operating state of the high-pressure fuel pump 10 lower than the pressure at the high pressure outlet 22 so that the check valve 84 is closed is.
- the magnet 86 of the control valve 38 is in this Operating state of the high pressure fuel pump 10 energized.
- the valve element 48 is against the valve seat 50 pressed; the control valve 38 is therefore closed (cf. 6, left area).
- the fuel flows on the one hand between the disc-shaped valve element 76 and the radial inner ring land 72a and the central opening (without Reference numerals) in the disk-shaped valve element 76 for Pump chamber 34.
- fuel also flows between the radially outer ring web 72b and the disc-shaped valve element 76 by the radial Recesses 82 and the corresponding recesses in Support element 78 in the pump chamber 34
- Check valve 36 thus designed as a double seat valve.
- the pressure in the pump chamber 34 thus increases trapped fuel. This continues until the pressure difference between that in the pump chamber 34 trapped fuel and the fuel on High pressure outlet 22 is so large that the check valve 84 opens. Then the fuel flows out of the pump chamber 34 through the lower flow channel 18 to the high pressure outlet 22 of the high pressure fuel pump 10 out.
- FIG. 7 is another embodiment of a High pressure fuel pump 10 shown.
- Such elements Areas and components that are functionally equivalent to Elements, areas and components of the in FIGS. 1-6 are described embodiment, wear the same reference numerals and are not again in detail explained.
- Embodiment relates to the arrangement of the Check valve 36 and the control valve 38. While at the embodiment shown in FIGS. 1-6 High pressure fuel pump 10, the check valve 36 and the control valve 38 were arranged coaxially with one another, is in the embodiment shown in Fig. 7 Control valve 38 is arranged next to the check valve 36.
- FIGS. 1-6 shows an internal combustion engine 92, into which a Fuel system 94 is installed. This includes one Fuel tank 96, from which an electrical Fuel pump 98 takes the fuel to a low pressure inlet 20 promotes a high pressure fuel pump 10.
- the High pressure fuel pump 10 is shown in FIGS. 1-6 or constructed in Fig. 7 type.
- the fuel rail has that Reference numeral 100.
- To the fuel rail 100 are several high pressure injectors, for example Injectors 102, connected. These inject the Fuel directly into corresponding combustion chambers 104.
- the Pressure in the fuel rail 100 is from one Pressure sensor 106 detected. This delivers corresponding Signals to a control and / or regulating device 108. This in turn controls the magnetic control valve (in Fig. 8 without reference numerals) of the high-pressure fuel pump 10 to the pressure in the fuel rail 100 in the sense a closed controlled system on a desired one Maintain level.
Abstract
Description
- Fig. 1:
- einen teilweisen Schnitt durch einen Bereich eines ersten Ausführungsbeispiels einer Hochdruck-Kraftstoffpumpe;
- Fig. 2 bis 4:
- eine stark vereinfachte Darstellung des Bereichs von Fig. 1 zu unterschiedlichen Zeitpunkten während des Betriebs der Hochdruck-Kraftstoffpumpe;
- Fig. 5:
- ein Diagramm, in dem das Fördervolumen der Hochdruck-Kraftstoffpumpe der Fig. 1 - 4 über der Zeit aufgetragen ist;
- Fig. 6:
- ein Diagramm, in dem der Öffnungszustand eines Steuerventils der Hochdruck-Kraftstoffpumpe der Fig. 1 - 4 über der Zeit aufgetragen ist;
- Fig. 7:
- eine schematisierte und teilweise geschnittene Darstellung eines Bereichs eines zweiten Ausführungsbeispiels einer Hochdruck-Kraftstoffpumpe; und
- Fig. 8:
- ein schematisiertes Blockschaltbild einer Brennkraftmaschine mit einem Kraftstoffsystem und einer Hochdruck-Kraftstoffpumpe gemäß Fig. 1.
Claims (11)
- Hochdruck-Kraftstoffpumpe (10), insbesondere für direkteinspritzende Brennkraftmaschinen (92), mit einem Gehäuse (12), welches einen Niederdruck-Einlass (20) und einen Hochdruck-Auslass (22) aufweist, mit einem in dem Gehäuse (12) vorhandenen Pumpraum (34), welcher mit dem Niederdruck-Einlass (20) und dem Hochdruck-Auslass (22) verbindbar ist, mit einem Steuerventil (38), welches den Pumpraum (34) mit dem Niederdruck-Einlass (20) verbinden kann und zum Niederdruck-Einlass (20) hin öffnet, und mit einem Rückschlagventil (36) mit einem vom Steuerventil (38) separaten Ventilelement (76), welches zwischen Niederdruck-Einlass (20) und Pumpraum (34) angeordnet ist und zum Pumpraum (34) hin öffnet, dadurch gekennzeichnet, dass das Rückschlagventil (36) und das Steuerventil (38) in einem gemeinsamen Ventilmodul (44) untergebracht sind, welches wenigstens bereichsweise in das Pumpengehäuse (12) eingesetzt ist und für das Steuerventil (38) und das Rückschlagventil (36) einen gemeinsamen Anschluss (64) zum Niederdruck-Einlass (20) hin aufweist.
- Hochdruck-Kraftstoffpumpe (10) nach Anspruch 1, dadurch gekennzeichnet, dass die Elemente des Rückschlagventils (36) und die Elemente des Steuerventils (38) nebeneinander in dem Ventilmodul (44) angeordnet sind.
- Hochdruck-Kraftstoffpumpe (10) nach Anspruch 1, dadurch gekennzeichnet, dass die Elemente des Rückschlagventils (36) und die Elemente des Steuerventils (38) zueinander koaxial in dem Ventilmodul (44) angeordnet sind.
- Hochdruck-Kraftstoffpumpe (10) nach Anspruch 3, dadurch gekennzeichnet, dass das Steuerventil (38) radial innen liegt und das Rückschlagventil (36) eine Mehrzahl von Strömungskanälen (70) umfasst, welche radial außen um mindestens einen Bereich des Steuerventils (38) im Ventilmodul (44) vorgesehen sind.
- Hochdruck-Kraftstoffpumpe (10) nach Anspruch 4, dadurch gekennzeichnet, dass das Rückschlagventil (36) ein scheibenringförmiges Ventilelement (76) umfasst.
- Hochdruck-Kraftstoffpumpe (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Ventilelement des Rückschlagventils (36) ein dünnes Plättchen (76) umfasst.
- Hochdruck-Kraftstoffpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Rückschlagventil (36) als Doppelsitzventil ausgebildet ist.
- Hochdruck-Kraftstoffpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Ventilmodul (44) zum Pumpraum (34) hin mindestens einen Stützabschnitt (78) umfasst, an dem sich ein Vorspannelement (74) abstützt, welches das Ventilelement (76) des Rückschlagventils (36) gegen den zugehörigen Ventilsitz (72) beaufschlagt.
- Hochdruck-Kraftstoffpumpe (10) nach Anspruch 8, dadurch gekennzeichnet, dass der Stützabschnitt (78) einstückig mit einem gemeinsamen Ventilgehäuse (30) ausgebildet ist.
- Kraftstoffsystem (94) mit einem Kraftstoffbehälter (96), mit mindestens einer Kraftstoff-Einspritzvorrichtung (102), welche den Kraftstoff direkt in den Brennraum (104) einer Brennkraftmaschine (92) einspritzt, mit mindestens einer Hochdruck-Kraftstoffpumpe (10), und mit einer Kraftstoff-Sammelleitung (100), an die die Kraftstoff-Einspritzvorrichtung (102) angeschlossen ist, dadurch gekennzeichnet, dass die Hochdruck-Kraftstoffpumpe (10) nach einem der Ansprüche 1 bis 9 ausgebildet ist.
- Brennkraftmaschine (92) mit mindestens einem Brennraum (104), in den der Kraftstoff direkt eingespritzt wird, dadurch gekennzeichnet, dass sie ein Kraftstoffsystem (94) nach Anspruch 10 aufweist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10124238A DE10124238A1 (de) | 2001-05-18 | 2001-05-18 | Hochdruck-Kraftstoffpumpe, insbesondere für direkteinspritzende Brennkraftmaschinen, sowie Kraftstoffsystem und Brennkraftmaschine |
DE10124238 | 2001-05-18 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1273796A2 true EP1273796A2 (de) | 2003-01-08 |
EP1273796A3 EP1273796A3 (de) | 2003-11-19 |
EP1273796B1 EP1273796B1 (de) | 2005-06-01 |
Family
ID=7685259
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02009419A Expired - Lifetime EP1273796B1 (de) | 2001-05-18 | 2002-04-25 | Hochdruck-Kraftstoffpumpe, insbesondere für direkteinspritzende Brennkraftmaschine, sowie Kraftstoffsystem und Brennkraftmaschine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1273796B1 (de) |
JP (1) | JP2002349391A (de) |
DE (2) | DE10124238A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008107065A1 (de) * | 2007-03-06 | 2008-09-12 | Ixetic Bad Homburg Gmbh | Pumpe mit einem magnetisch angesteuertem schaltventil zur saugdrosselung |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT504433B8 (de) * | 2006-11-07 | 2008-09-15 | Bosch Gmbh Robert | Pumpenelement für eine common-rail-hochdruckpumpe |
JP2009287733A (ja) * | 2008-05-30 | 2009-12-10 | Denso Corp | 電磁弁、電磁弁を備えた流体ポンプ、および、電磁弁を備えた流体噴射装置 |
DE102008062518B4 (de) * | 2008-12-16 | 2016-05-25 | Continental Automotive Gmbh | Hochdruckpumpe |
DE102010062451A1 (de) * | 2010-12-06 | 2012-06-06 | Robert Bosch Gmbh | Schaltventil mit einem Ventilkörper und einer diesen wenigstens zeitweise in Öffnungsrichtung beaufschlagenden Ventilnadel |
DE102011005485A1 (de) | 2011-03-14 | 2012-09-20 | Robert Bosch Gmbh | Ventileinrichtung zum Schalten oder Zumessen eines Fluids |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19834120A1 (de) | 1998-07-29 | 2000-02-03 | Bosch Gmbh Robert | Kraftstoffversorgungsanlage einer Brennkraftmaschine |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4343280A (en) * | 1980-09-24 | 1982-08-10 | The Bendix Corporation | Fuel delivery control arrangement |
DE3144361A1 (de) * | 1981-11-07 | 1983-05-19 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoffeinspritzeinrichtung fuer brennkraftmaschinen |
DE69720603T2 (de) * | 1996-07-05 | 2004-03-04 | Nippon Soken, Inc., Nishio | Hochdruckpumpe |
-
2001
- 2001-05-18 DE DE10124238A patent/DE10124238A1/de not_active Ceased
-
2002
- 2002-04-25 DE DE50203241T patent/DE50203241D1/de not_active Expired - Lifetime
- 2002-04-25 EP EP02009419A patent/EP1273796B1/de not_active Expired - Lifetime
- 2002-05-15 JP JP2002140249A patent/JP2002349391A/ja active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19834120A1 (de) | 1998-07-29 | 2000-02-03 | Bosch Gmbh Robert | Kraftstoffversorgungsanlage einer Brennkraftmaschine |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008107065A1 (de) * | 2007-03-06 | 2008-09-12 | Ixetic Bad Homburg Gmbh | Pumpe mit einem magnetisch angesteuertem schaltventil zur saugdrosselung |
US8475142B2 (en) | 2007-03-06 | 2013-07-02 | Ixetic Bad Homburg Gmbh | Pump having a magnetically actuated control valve for suction regulation |
Also Published As
Publication number | Publication date |
---|---|
EP1273796A3 (de) | 2003-11-19 |
JP2002349391A (ja) | 2002-12-04 |
DE10124238A1 (de) | 2002-11-28 |
DE50203241D1 (de) | 2005-07-07 |
EP1273796B1 (de) | 2005-06-01 |
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