EP0925446B1 - Radialkolbenpumpe zur kraftstoffhochdruckversorgung - Google Patents
Radialkolbenpumpe zur kraftstoffhochdruckversorgung Download PDFInfo
- Publication number
- EP0925446B1 EP0925446B1 EP98941252A EP98941252A EP0925446B1 EP 0925446 B1 EP0925446 B1 EP 0925446B1 EP 98941252 A EP98941252 A EP 98941252A EP 98941252 A EP98941252 A EP 98941252A EP 0925446 B1 EP0925446 B1 EP 0925446B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston pump
- pump according
- radial piston
- valve
- orifice
- 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
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Classifications
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- 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
- F04B1/0421—Cylinders
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- 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
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- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/102—Disc valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7504—Removable valve head and seat unit
- Y10T137/7559—Pump type
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7904—Reciprocating valves
- Y10T137/7922—Spring biased
- Y10T137/7929—Spring coaxial with valve
- Y10T137/7931—Spring in inlet
Definitions
- the invention relates to a radial piston pump for High-pressure fuel supply in fuel injection systems of internal combustion engines, especially in a common rail injection system, with one in a pump housing (2) Drive shaft which is eccentric or in Has a plurality of cam-like elevations circumferential direction, and with preferably several radially in relation to the drive shaft a respective cylinder space arranged pistons, which at Turn the drive shaft back and forth in the cylinder space are movable, and with a suction side and a check valve on the high pressure side and with one component a through hole forming the cylinder space, in the radially outer end of a closure element is used, wherein the closure element in the longitudinal direction of the cylinder space forming through opening closed pressure-tight to the outside is and the fuel supply to the intake side Check valve via a to the longitudinal direction essentially radial fuel supply opening takes place in the component with an element forming a valve seat, which has a central Has opening through which a tappet of a valve body extends through, the valve body one on the tap
- DE-A 2 338 489 describes a valve-controlled high-pressure pump known, in which the valve seat of the intake side Check valve is arranged in the housing. Above this Check valve is an intake chamber by one Closure element is sealed to the outside.
- a piston pump is a hydraulic one Brake system for a motor vehicle known in one of two Intake valves is arranged in a closure element.
- the present invention has the object based on a more compact design of the radial piston pump specify.
- This task is the beginning of a radial piston pump mentioned type according to the invention solved in that the Abutment is formed by a flange bushing element, and that the suction side check valve in the closure element is integrated.
- the fact that the intake-side check valve in the Closing element is integrated, can be (for Drive shaft) radially outer intake space and the corresponding required additional outer housing wall can be dispensed with.
- the inventive design of the abutment as Flanged bushing element has manufacturing advantages and leads thereby to an improved operating behavior of the Radial piston pump.
- valve body of the suction-side check valve entirely in a cup-shaped Provided recess of the closure element and sealing against the mouth area of a in the bottom of the cup-shaped recess trained and communicating with the fuel supply Opening biased in the closing direction.
- the opening mentioned can again, as mentioned at the beginning, with an oblique bore in the closure element and one between the closure element and to communicate with the component.
- the valve body could in any way against the Bottom of the cup-shaped recess are biased. It has but is advantageous in terms of construction and assembly technology proven when on the open towards the pump piston Side of the cup-shaped recess a support for the Valve body prestressing spring in the closing direction is then between the support and the piston facing Side of the valve body is arranged. To form the Any radial projections in the support could itself Pot-shaped recess may be provided. It has in contrast, however, with a view to simple assembly as proven advantageous if the support of a kind Cover element with a flow opening for the material to be conveyed Fuel is formed.
- the cover element could with a Be provided with an internal thread and a corresponding Flange section of the closure element can be screwed on or it could be screwed in at several points instead of one be caulked to the flange portion.
- the closure element can be a simple one mountable screw plug acting in one on the radial provided internal thread of the outer end of the component is screwed in.
- the through opening in the component is stepped or stepped and that Closure element with a, in particular ring collar Sealing flange sealing against a step of the through opening is pressed and the suction valve centrally within the Sealing flange is arranged.
- a sealant used for example in the form of an elastomeric sealing ring during the sealing to the cylinder chamber by pressing of the sealing flange against the step.
- One of the annular space can be inclined to the longitudinal direction of the Through opening in the interior of the closure element to the check valve on the intake-side check valve be provided to the suction side of the check valve with to connect the annular space in terms of flow.
- the closure element can on its side facing the piston Side have a cup-shaped recess in which the intake-side check valve is added.
- the intake-side check valve the preferably constructed in the manner described below can be detached from the cylinder space forming component outside of the pump housing on the Mount the locking element.
- the valve body has a valve disk attached to the tappet, the sealing against the end face surrounding the tappet opening, ie the side of the element facing the piston can be applied.
- valve seat and the valve body interacting with it have conical or tapered sealing surfaces, so the valve plate centers when the valve is closed Check valve by itself.
- the valve is preferably constructed so that on the Pump piston facing away from the side in the cup-shaped recess used element a the valve body in the closing direction biasing spring is provided.
- the spring can turn one against the element and at the other against one on the pestle support the attached abutment so that the plunger is in Closing direction, i.e. towards the bottom of the pot-shaped Recess is biased, and against the at the piston-facing side of the element formed sealing seat is created sealing.
- the abutment on the tappet could in any way in itself be trained.
- a Collar bushing element is formed, which with its Push the socket section onto the ram and there in basically any way, but preferably positively, in particular by a flaring operation, or by laser welding, to which the ram is attached.
- the assembly described above is then in the Sealing the cup-shaped recess of the closure element used.
- the element can advantageously in the cup-shaped recess is screwed in and at the same time be glued in. This way, a safe and good one tight fit can be achieved.
- annulus training there is also no certain rotational position of the element or assembly with respect of the closure element. According to another variant, it can Element be inserted sealingly under peeling riveting.
- this includes Closure element a valve plate, which faces the piston Forms end face of the closure element and a central Has opening through which a tappet of a valve body extends through. So according to this embodiment instead of the element inserted into the cup-shaped recess a valve plate perpendicular to the longitudinal direction of the cylinder space against the face of a closure element base body assembled.
- the valve plate can be sealed in any way Front side of the closure element are releasably attached; it the choice of metallic seals has proven itself for this.
- the Valve plate is therefore preferably concentric running biting edge on the base body of the closure element tightened pressure-tight. Such a bite edge is a kind of bead-like metallic elevation of the Sealing surface.
- the fuel supply to the intake side of the check valve preferably takes place in that in the valve plate at least one in the longitudinal direction of the cylinder space in the essential radial opening is provided which with the Fuel supply opening in the cylinder space Component communicates.
- the closure element or the closure element base body has a cup-shaped recess into which a part of the Extend the valve body, since in such a case the valve plate mentioned above a relatively small Can have thickness.
- the above-mentioned radial opening in the valve plate could be about an oblique hole in the pot-shaped Opening. However, it proves to be manufacturing technology than easier if this radial opening in the Tappet passage opening of the valve plate on the intake side of the valve seat opens.
- the check valve is also preferably designed such that the valve body has one attached to the tappet Has valve plate, which seals to one Tappet surrounding sealing seat on the front of the Valve plate can be put on.
- the plunger can open the opening reach through with play in the valve plate.
- the valve seat the sealing plate and the valve body interacting therewith preferably have conical or tapered Sealing surfaces.
- the abutment is in one fixed on the plunger in such a way that a desired preselected opening pressure of the check valve results in the abutment with the valve body resting against the sealing seat so far is pushed against the plunger against the spring force until the desired counterforce defining the opening pressure adjusts and the abutment in this position on the ram is fixed.
- Figures 1 and 2 show a radial piston pump High-pressure fuel supply in fuel injection systems of internal combustion engines.
- the radial piston pump is with a integrated demand control.
- As a control concept the principle of the suction throttle control is followed.
- the Fuel is not supplied and dimensioned via a metering unit shown.
- the radial piston pump comprises one in a pump housing 2 mounted drive shaft 4 with an eccentrically designed Shaft section 6.
- On the eccentric shaft section 6 is an intermediate socket 8 is provided, opposite the Shaft section 6 is rotatable.
- the intermediate bush 8 comprises three in each case offset by 120 ° flats 10 against each have a piston 12 with a block-like System section 14 supports.
- the pistons 12 are each in one formed by a solid metallic component 16 Cylinder chamber 18 to the drive shaft 4 in the radial direction slidably added.
- a passage opening 20 is provided in the component 16.
- the Through opening 20 is stepped and has a smaller diameter forming the actual cylinder space 18 Section 22 and a larger diameter section 24.
- a closure element 26 used pressure-tight.
- the closure element 26 is one Locking screw 28, with the interposition of an O-ring seal 30 in the larger diameter section 24 of the Through opening 20 is screwed.
- Reference numeral 34 denotes the intake-side check valve integrated.
- the screw plug 28 or the check valve 34, the smaller diameter portion 22 of the through opening 20 and the compressor-side end face 36 of the pump piston 12 define a compressor or high pressure space 38. If the drive shaft 4 from the position shown in Figure 1 rotated up to 180 °, the meantime in Figure 1 above shown pistons under the action of a compression spring 40 moved out of the cylinder chamber 18. During this suction phase increases the volume of the pressure chamber 38 and the intake side Check valve 34 opens in a to be described in more detail Wise. If after further rotation of the drive shaft 4 the Piston 12 is moved in the compression direction, so it will Check valve 34 closed and one shown in Figure 2 Check valve 42 on the high-pressure side opens. The one in the print room 38 fuel under high pressure can then via a Cylinder chamber 18 outgoing branch passage 44 via the check valve 42 on the high-pressure side and a connection 46 flow into an engine piston or a high-pressure storage chamber.
- the Screw plug 28 in the area of the axial step 32 Through opening 20 a little in its radial direction reset outer diameter and limited together with the inside of the larger diameter portion 24 of the Through opening 20 an annular space 48.
- a radial fuel feed opening 50 opens into the component 16. Then several of the annular space 48 go to the longitudinal direction the through opening 20 from oblique bores 52, and open into a central pot-shaped recess 54 in the Locking screw 28.
- the suction-side check valve 34 is as follows in FIG Cup-shaped recess 54 of the screw plug 28 integrated: In the free end of the cup-shaped recess facing the piston 54 is an element 58 defining a valve seat 56 screwed in pressure-tight with glue. Element 58 has one central through opening 60 for a plunger 62 a Valve body 64 on. The valve body 64 points to the piston side of the element 58 a valve plate 66 on, which can be sealed against the valve seat 56.
- a spring 68 On the side of the element 58 facing away from the pump piston 12 inside the cup-shaped recess 54 is provided with a spring 68, which the plunger 62 of the valve body 64 in the direction of the Bottom of the cup-shaped recess 54 so that the Valve plate 66 is sealingly placed against the valve seat 56.
- the spring 68 is supported at one end against the element 58 and at the other end against one formed by a collar bushing element 70 Abutment 72 from.
- the flange sleeve element 70 is in one Position crimped in the plunger 62 that a predetermined Opening pressure of the check valve 34 is set.
- the Check valve 34 is outside of the screw 28 with the desired opening pressure and then through Screwing the element 58 into the cup-shaped recess 54 in the screw plug 28 integrated.
- FIG 4 differs of that shown in Figure 3 in that the element 58 ' not into the pot-shaped recess 54 'by means of adhesive is screwed in, but cannot be removed by peeling riveting is fixed, see reference number 74.
- this includes intake-side check valve 80 a valve body 82, the completely in a cup-shaped recess 84 of the screw plug 86 is included.
- the valve body 82 is via a spring 88 towards the bottom 90 of the cup-shaped recess 84 biased, the spring 88 against the inside of a Supported cover element 92, which also in cross section is cup-shaped and a flange portion 94 of the Grips screw 86 and this with several Is caulked, see reference numeral 96.
- An annular space also provided in this embodiment 98 leads an oblique bore 100 to one from the bottom 90 of the Pot-shaped recess 84 from the introduced central Blind hole 102.
- FIGS. 6 and 7 show a further embodiment of the Radial piston pump according to the invention.
- Locking screw 110 comprises a locking element a valve plate 112 forming the end facing the piston, which sealing against a closure element base body 114 is dressed.
- the valve plate 112 includes a central opening 118 through which a plunger 120 a valve body 122 of the suction-side check valve 124 round picks.
- the plunger 120 engages in a cup-shaped Recess 126 in the closure element base body 114 and has a valve disk at its free end facing the piston 128 on, against one formed by the valve plate 112
- Sealing seat 130 can be sealingly applied.
- Valve disc 128 and Sealing seat 130 have conical sealing surfaces.
- the valve plate 112 is somewhat on its radially outer circumference reset and limited there together with the Component 134 forming cylinder space 131 of piston 132 forms a Annulus 136, which has a radial fuel supply opening 138 communicates with the fuel supply in component 134.
- the annular space 136 extends a plurality of radial feed bores 140 in the valve plate 112 and open into the Ram through opening 118 of the valve plate 112. Die Ram through opening 118 is radial in the region of the mouth somewhat widened, see reference numeral 142, so that when the Check valve 124 fuel past the plunger 120 in the Compressor room of the pump can enter.
- the check valve 124 is also in this embodiment initially outside of component 134 and the Closure element main body 114 on the valve plate 112 assembled.
- the flange bushing element 146 was in one such position on the plunger 120 that a Desired opening pressure of the check valve results.
- the pre-assembled unit was then in the larger diameter Section 148 of the cylinder space 131 defining Through opening used in component 134 and screwed.
- the closure element base body 114 sealing against the valve disk 112 via the bite edges 116 tightened and the valve disc 112 is sealed to an axial Stage 150 of component 134 pressed.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
- Details Of Reciprocating Pumps (AREA)
Description
- Figur 1
- eine Schnittansicht einer ersten Ausführungsform einer erfindungsgemäßen Radialkolbenpumpe, wobei der Schnitt senkrecht zur Antriebswellenachse verläuft;
- Figur 2
- eine Schnittansicht entlang der Ebene der Pfeile II-II in Figur 1;
- Figur 3
- eine vergrößerte Detailansicht eines Ausschnitts aus Figur 2;
- Figur 4
- eine der Figur 3 entsprechende Detailansicht einer Radialkolbenpumpe mit abweichend gestaltetem Verschlusselement;
- Figur 5
- eine der Figur 3 entsprechende Detailansicht einer weiteren Ausführungsform des Verschlusselements;
- Figur 6
- eine der Figur 1 entsprechende Schnittansicht einer weiteren Ausführungsform der erfindungsgemäßen Radialkolbenpumpe; und
- Figur 7
- eine Detailansicht des Verschlusselements nach Figur 6.
Claims (31)
- Radialkolbenpumpe zur Kraftstoffhochdruckversorgung bei Kraftstoffeinspritzsystemen von Brennkraftmaschinen, insbesondere bei einem Common-Rail-Einspritzsystem, mit einer in einem Pumpengehäuse (2) gelagerten Antriebswelle (4), die exzentrisch ausgebildet ist oder in Umfangsrichtung mehrere nockenartige Erhebungen aufweist, und mit vorzugsweise mehreren bezüglich der Antriebswelle (4) radial in einem jeweiligen Zylinderraum (18, 131) angeordneten Kolben (12, 132), die bei Umdrehen der Antriebswelle (4) in dem Zylinderraum hin- und her bewegbar sind, und mit einem ansaugseitigen und einem hochdruckseitigen Rückschlagventil (34, 42, 124) und mit einem Bauteil (16, 134) mit einer den Zylinderraum (18, 131) bildenden Durchgangsöffnung (20), in deren radial äußeres Ende ein Verschlußelement (26, 110) eingesetzt ist, wobei das Verschlußelement (26, 110) in Längsrichtung der den Zylinderraum bildenden Durchgangsöffnung (20) nach außen druckdicht geschlossen ist und die Kraftstoffzuführung zu dem ansaugseitigen Rückschlagventil (34, 42, 124) über eine zur Längsrichtung im wesentlichen radiale Kraftstoffzuführöffnung (50, 138) in dem Bauteil (16, 134) erfolgt, mit einem einen Ventilsitz (56) bildenden Element (58, 58'), das eine zentrische Öffnung (60) aufweist, durch die sich ein Stößel (62) eines Ventilkörpers (64) hindurcherstreckt, wobei der Ventilkörper (64) einen an den Stößel (62) angefügten Ventilteller (66) aufweist, welcher dichtend an die die Stößelöffnung (60) umgebende Stirnseite des Elements (58, 58') anlegbar ist, wobei auf der vom Kolben (12) abgewandten Seite des den Ventilsitz bildenden Elements (58, 58') eine den Ventilkörper (64), in Schließrichtung vorspannende Feder (68) vorgesehen ist, und wobei sich die Feder (68) einenends gegen das Element (58, 58') und anderenends gegen ein am Stößel (62) befestigtes Widerlager (72) abstützt, dadurch gekennzeichnet, dass das Widerlager (72) von einem Bundbuchsenelement (70) gebildet ist, und dass das ansaugseitige Rückschlagventil (34, 42, 124) in das Verschlußelement (26, 110) integriert ist.
- Radialkolbenpumpe zur Kraftstoffhochdruckversorgung bei Kraftstoffeinspritzsystemen von Brennkraftmaschinen, insbesondere bei einem Common-Rail-Einspritzsystem, mit einer in einem Pumpengehäuse (2) gelagerten Antriebswelle (4), die exzentrisch ausgebildet ist oder in Umfangsrichtung mehrere nockenartige Erhebungen aufweist, und mit vorzugsweise mehreren bezüglich der Antriebswelle (4) radial in einem jeweiligen Zylinderraum (18, 131) angeordneten Kolben (12, 132), die bei Umdrehen der Antriebswelle (4) in dem Zylinderraum hin- und her bewegbar sind, und mit einem ansaugseitigen und einem hochdruckseitigen Rückschlagventil (34, 42, 124) und mit einem Bauteil (16, 134) mit einer den Zylinderraum (18, 131) bildenden Durchgangsöffnung (20), in deren radial äußeres Ende ein Verschlußelement (26, 110) eingesetzt ist, wobei das Verschlußelement (26, 110) in Längsrichtung der den Zylinderraum bildenden Durchgangsöffnung (20) nach außen druckdicht geschlossen ist und die Kraftstoffzuführung zu dem ansaugseitigen Rückschlagventil (34, 42, 124) über eine zur Längsrichtung im wesentlichen radiale Kraftstoffzuführöffnung (50, 138) in dem Bauteil (16, 134) erfolgt, dadurch gekennzeichnet, dass das ansaugseitige Rückschlagventil (34, 42, 124) in das Verschlußelement (26, 110) integriert ist, dass der Ventilkörper (82) des ansaugseitigen Rückschlagventils (80) in einer topfförmigen Ausnehmung (84) des Verschlusselements (86) vorgesehen und dichtend gegen den Mündungsbereich einer im Boden (90) der topfförmigen Ausnehmung (84) ausgebildeten und mit der Kraftstoffzufuhr kommunizierenden Öffnung (102) in Schließrichtung vorgespannt ist.
- Radialkolbenpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Verschlußelement (26, 110) eine Verschlußschraube (28) ist, die in ein an dem radial äußeren Ende des Bauteils (16, 134) vorgesehenes Innengewinde eingeschraubt ist.
- Radialkolbenpumpe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Durchgangsöffnung (20) abgesetzt oder gestuft ausgebildet ist und dass das Verschlusselement (26, 110) mit einem, insbesondere ringbundartigen Dichtflansch (30) gegen eine Stufe (32, 150) der Durchgangsöffnung dichtend angepresst ist und das Rückschlagventil (34) zentral innerhalb des Dichtflanschs (30) angeordnet ist.
- Radialkolbenpumpe nach Anspruch 4, dadurch gekennzeichnet, dass gegenüber dem Dichtflansch (30) radial außen ein Ringraum (48, 98, 136) zwischen dem Verschlusselement (26, 86, 110) und der die Durchgangsöffnung (20) begrenzenden Wandung des Bauteils (16, 134) vorgesehen ist, in welchen die Kraftstoffzufuhröffnung (50, 138) mündet.
- Radialkolbenpumpe nach Anspruch 5, dadurch gekennzeichnet, dass von dem Ringraum (48, 98) eine sich schräg zur Längsrichtung der Durchgangsöffnung (20) in das Innere des Verschlusselements (26, 86) zu dem ansaugseitigen Rückschlagventil (34, 80) erstreckende Schrägbohrung (52, 100) vorgesehen ist.
- Radialkolbenpumpe nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Verschlusselement (26, 86, 110) auf seiner dem Kolben (12, 132) zugewandten Seite eine topfförmige Ausnehmung (54, 54', 102, 126) aufweist, in der das ansaugseitige Rückschlagventil (34, 80, 124) aufgenommen ist.
- Radialkolbenpumpe nach Anspruch 7, dadurch gekennzeichnet, dass in die topfförmige Ausnehmung (54, 54') das den Ventilsitz bildende Element (58, 58') eingesetzt ist.
- Radialkolbenpumpe nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass der Stößel (62) die Öffnung (60) des den Ventilsitz (56) bildenden Elements (58, 58') spielbehaftet durchgreift.
- Radialkolbenpumpe nach Anspruch 7, 8 oder 9, dadurch gekennzeichnet, dass der Ventilsitz (56) und der damit zusammenwirkende Ventilkörper (64) konisch oder kegelig verlaufende Dichtflächen aufweisen.
- Radialkolbenpumpe einem der Ansprüche 1 sowie 3 bis 10, dadurch gekennzeichnet, dass das Widerlager (72) formschlüssig, insbesondere durch einen Bördelarbeitsgang, an den Stößel (62) angefügt ist.
- Radialkolbenpumpe einem der Ansprüche 1 sowie 3 bis 11, dadurch gekennzeichnet, dass das Widerlager (72) in einer solchen Position am Stößel (62) fixiert ist, dass sich ein vorgewählter Öffnungsdruck des Rückschlagventils (34) ergibt. A15
- Radialkolbenpumpe nach einem der Ansprüche 1 sowie 3 bis 12, dadurch gekennzeichnet, dass das Element (58) in die topfförmige Ausnehmung (54) eingeschraubt und eingeklebt ist. A16
- Radialkolbenpumpe nach einem der Ansprüche 1 sowie 3 bis 12, dadurch gekennzeichnet, dass das Element (58') in die topfförmige Ausnehmung (54') unter Schälnietung dichtend eingefügt ist.
- Radialkolbenpumpe nach Anspruch 2, dadurch gekennzeichnet, dass auf der dem Kolben zugewandten offenen Seite der topfförmigen Ausnehmung (84) eine Abstützung für eine den Ventilkörper (82) in Schließrichtung vorspannende Feder (88) vorgesehen ist.
- Radialkolbenpumpe nach Anspruch 15, dadurch gekennzeichnet, dass die Abstützung von einem Deckelelement (92) mit einer Durchströmöffnung gebildet ist.
- Radialkolbenpumpe nach Anspruch 16, dadurch gekennzeichnet, dass das Deckelelement (92) im Querschnitt topfförmig ist und einen Flanschabschnitt (94) des Verschlusselements (86) übergreift.
- Radialkolbenpumpe nach Anspruch 16 oder 17, dadurch gekennzeichnet, dass das Deckelelement (92) an mehreren Punkten mit dem Verschlusselement (86) verstemmt ist.
- Radialkolbenpumpe nach einem der Ansprüche 1 sowie 2 bis 7, dadurch gekennzeichnet, dass das Verschlusselement (110) eine Ventilplatte (112) umfasst, die die kolbenzugewandte Stirnseite des Verschlußelements mit einem Ventilsitz (130) bildet und eine zentrische Öffnung (118) aufweist, durch die sich ein Stößel (120) eines Ventilkörpers (122) hindurcherstreckt.
- Radialkolbenpumpe nach Anspruch 19, dadurch gekennzeichnet, dass die Ventilplatte (112) über eine vorzugsweise konzentrisch verlaufende Beisskante (116) an einen Grundkörper (114) des Verschlusselements (110) druckdicht angezogen ist.
- Radialkolbenpumpe nach Anspruch 19 oder 20, dadurch gekennzeichnet, dass in der Ventilplatte (112) wenigstens eine zur Längsrichtung des Zylinderraums (131) im wesentlichen radiale Öffnung (140) vorgesehen ist, die mit der Kraftstoffzuführöffnung (138) in dem Bauteil (134) kommuniziert.
- Radialkolbenpumpe nach Anspruch 21, dadurch gekennzeichnet, dass die radiale Öffnung (140) in der Stößeldurchgangsöffnung (118) der Ventilplatte (112) mündet.
- Radialkolbenpumpe nach einem der Ansprüche 19 bis 22, dadurch gekennzeichnet, dass der Grundkörper (114) des Verschlusselements (110) auf seiner dem Kolben (132) zugewandten Seite eine topfförmige Ausnehmung (126) aufweist, in die der Stößel (120) des Rückschlagventils (124) hineinragt.
- Radialkolbenpumpe nach Anspruch 23, dadurch gekennzeichnet, dass der Ventilkörper (122) einen an den Stößel (120) angefügten Ventilteller (128) aufweist, welcher dichtend an einen die Stößelöffnung (118) umgebenden Dichtsitz (130) an der Stirnseite der Ventilplatte (112) anlegbar ist.
- Radialkolbenpumpe nach Anspruch 23, dadurch gekennzeichnet, dass der Stößel (120) die Öffnung (118) in der Ventilplatte (112) spielbehaftet durchgreift.
- Radialkolbenpumpe nach Anspruch 25, dadurch gekennzeichnet, dass der Ventilsitz (130) der Ventilplatte (112) und der damit zusammenwirkende Ventilkörper (122) konisch oder kegelig verlaufende Dichtflächen aufweisen.
- Radialkolbenpumpe nach einem der Ansprüche 23 bis 26, dadurch gekennzeichnet, dass auf der vom Kolben (132) abgewandten Seite der Ventilplatte (112) eine den Ventilkörper (122) in Schließrichtung vorspannende Feder (144) vorgesehen ist.
- Radialkolbenpumpe nach Anspruch 27, dadurch gekennzeichnet, dass sich die Feder (144) einenends gegen die Ventilplatte (112) und anderenends gegen ein am Stößel (120) vorgesehenes Widerlager abstützt.
- Radialkolbenpumpe nach Anspruch 28, dadurch gekennzeichnet, dass das Widerlager von einem Bundbuchsenelement (146) gebildet ist.
- Radialkolbenpumpe nach Anspruch 28 oder 29, dadurch gekennzeichnet, dass das Widerlager im Presssitz oder formschlüssig, insbesondere durch einen Bördelarbeitsgang, an den Stößel (122) angefügt ist.
- Radialkolbenpumpe nach Anspruch 28, 29 oder 30, dadurch gekennzeichnet, dass das Widerlager in einer solchen Position am Stößel (122) fixiert ist, dass sich ein vorgewählter Öffnungsdruck des Rückschlagventils (124) ergibt.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19729791A DE19729791A1 (de) | 1997-07-11 | 1997-07-11 | Radialkolbenpumpe zur Kraftstoffhochdruckversorgung |
DE19729791 | 1997-07-11 | ||
PCT/DE1998/001789 WO1999002858A1 (de) | 1997-07-11 | 1998-06-30 | Radialkolbenpumpe zur kraftstoffhochdruckversorgung |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0925446A1 EP0925446A1 (de) | 1999-06-30 |
EP0925446B1 true EP0925446B1 (de) | 2003-09-03 |
EP0925446B2 EP0925446B2 (de) | 2010-10-20 |
Family
ID=7835426
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98941252A Expired - Lifetime EP0925446B2 (de) | 1997-07-11 | 1998-06-30 | Radialkolbenpumpe zur kraftstoffhochdruckversorgung |
Country Status (5)
Country | Link |
---|---|
US (1) | US6224350B1 (de) |
EP (1) | EP0925446B2 (de) |
JP (1) | JP4053094B2 (de) |
DE (2) | DE19729791A1 (de) |
WO (1) | WO1999002858A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004028073B3 (de) * | 2004-06-09 | 2005-08-04 | Siemens Ag | Rückschlagventil |
DE102005023323A1 (de) * | 2005-05-20 | 2006-11-23 | Siemens Ag | Rückschlagventil |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
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IT1310755B1 (it) * | 1999-11-30 | 2002-02-22 | Elasis Sistema Ricerca Fiat | Pompa idraulica ad alta pressione, in particolare pompa a pistoniradiali per il carburante di un motore a combustione interna. |
DE10057683B4 (de) * | 2000-11-21 | 2005-10-06 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung |
DE10117600C1 (de) * | 2001-04-07 | 2002-08-22 | Bosch Gmbh Robert | Hochdruck-Kraftstoffpumpe für ein Kraftstoffsystem einer direkteinspritzenden Brennkraftmaschine, Kraftstoffsystem sowie Brennkraftmaschine |
DE10147981A1 (de) * | 2001-09-28 | 2003-04-24 | Siemens Ag | Verbindungselement zur Verbindung eines Kolbens mit einem Rückstellelement |
ITTO20011039A1 (it) * | 2001-10-30 | 2003-04-30 | Ct Studi Componenti Per Veicol | Valvola di aspirazione per una pompa ad alta pressione, in particolare per combustibile di un motore endotermico. |
US7179060B2 (en) | 2002-12-09 | 2007-02-20 | Caterpillar Inc | Variable discharge pump with two pumping plungers and shared shuttle member |
EP1636488B1 (de) * | 2003-05-22 | 2008-01-23 | Robert Bosch Gmbh | Rückschlagventil, insbesondere für eine hochdruckpumpe einer kraftstoffeinspritzeinrichtung für eine brennkraftmaschine |
KR100892527B1 (ko) | 2003-12-31 | 2009-04-10 | 현대자동차주식회사 | 차량용 브레이크시스템 |
US7517200B2 (en) * | 2004-06-24 | 2009-04-14 | Caterpillar Inc. | Variable discharge fuel pump |
US7470117B2 (en) * | 2004-11-30 | 2008-12-30 | Caterpillar Inc. | Variable discharge fuel pump |
DE102005033634A1 (de) | 2005-07-19 | 2007-01-25 | Robert Bosch Gmbh | Hochdruck-Kraftstoffpumpe für ein Kraftstoff-Einspritzsystem einer Brennkraftmaschine |
DE102006017037B4 (de) * | 2006-04-11 | 2015-09-17 | Continental Automotive Gmbh | Radialkolbenpumpe zur Kraftstoffhochdruckversorgung bei einer Brennkraftmaschine |
AT504433B8 (de) * | 2006-11-07 | 2008-09-15 | Bosch Gmbh Robert | Pumpenelement für eine common-rail-hochdruckpumpe |
US8864478B2 (en) * | 2007-06-04 | 2014-10-21 | Caterpillar Inc. | System and method for preloading a high stress area of a component |
US7451741B1 (en) * | 2007-10-31 | 2008-11-18 | Caterpillar Inc. | High-pressure pump |
DE102008048450B4 (de) * | 2008-09-23 | 2014-10-30 | Continental Automotive Gmbh | Saugventil für einen Zylinder der Kraftstoff-Hochdruckpumpe eines Common-Rail-Einspritzsystems |
DE102010040459A1 (de) | 2010-09-09 | 2012-03-15 | Robert Bosch Gmbh | Rückschlagventil, insbesondere für eine Kraftstoffhochdruckpumpe |
DE102013220768A1 (de) * | 2013-10-15 | 2015-04-16 | Continental Automotive Gmbh | Ventilanordnung |
JP6533290B2 (ja) * | 2014-12-24 | 2019-06-19 | ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツングRobert Bosch Gmbh | 燃料、好ましくはディーゼル燃料を内燃機関に供給するためのポンプユニット |
US9856844B2 (en) | 2015-04-28 | 2018-01-02 | MAGNETI MARELLI S.p.A. | Fuel pump for a direct injection system with a better hydraulic sealing of the intake valve |
DE102015008520A1 (de) * | 2015-06-30 | 2017-01-05 | Armaturenfabrik Franz Schneider GmbH + Co. KG | Absperrventil |
EP3228864B1 (de) * | 2016-04-08 | 2018-08-01 | J.P. Sauer & Sohn Maschinenbau GmbH | Ventileinheit für einen kolbenkompressor und kolbenkompressor |
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US255400A (en) * | 1882-03-21 | Air-compressor | ||
US393980A (en) * | 1888-12-04 | Valve for air-compressors | ||
US990604A (en) * | 1909-07-16 | 1911-04-25 | Elbridge W Stevens | Process and apparatus for scavenging internal-combustion engines. |
US3084709A (en) * | 1960-05-19 | 1963-04-09 | Flick Reedy Corp | Removable check unit |
DE2623496A1 (de) * | 1976-05-26 | 1977-12-15 | Bosch Gmbh Robert | Zuendspule fuer zuendanlagen von otto-motoren |
DE3046753C2 (de) * | 1980-12-12 | 1986-02-27 | Mannesmann Rexroth GmbH, 8770 Lohr | Hydrostatische Radialkolbenpumpe |
DE3404520C2 (de) * | 1984-02-09 | 1997-01-09 | Uraca Pumpen | Pumpe oder Hydraulikanlage |
US4878815A (en) * | 1988-05-18 | 1989-11-07 | Stachowiak J Edward | High pressure reciprocating pump apparatus |
DE3928375C2 (de) † | 1989-08-28 | 1998-02-26 | Teves Gmbh Alfred | Kolbenpumpe |
DE8916183U1 (de) * | 1989-08-31 | 1994-09-22 | J. Wagner Gmbh, 88048 Friedrichshafen | Membranpumpe |
DE4204631A1 (de) † | 1992-02-15 | 1992-10-15 | Schaeffler Waelzlager Kg | Radialkolbenpumpe |
DE4213798C2 (de) * | 1992-04-27 | 2002-10-24 | Bosch Gmbh Robert | Radialkolbenpumpe, insbesondere Kraftstoffpumpe für Verbrennungsmotoren |
US5358383A (en) * | 1992-04-27 | 1994-10-25 | Elasis Sistema Ricerca Fiat Nel Mezzogiorno | Radial-piston pump for internal combustion engine fuel |
DE4241825A1 (de) † | 1992-12-11 | 1994-06-16 | Teves Gmbh Alfred | Geräuschreduzierte Hochdruckpumpe, insbesondere für geregelte Bremsanlagen |
DE4301521A1 (de) * | 1993-01-21 | 1994-07-28 | Bosch Gmbh Robert | Druckventil |
US5354183A (en) * | 1993-02-11 | 1994-10-11 | Elasis Sistema Ricerca Fiat Nel Mezzogiorno Societa Consortile Per Azioni | Pumping device with a main pumping stage and a supply pump |
JPH06323241A (ja) * | 1993-05-14 | 1994-11-22 | Sumitomo Electric Ind Ltd | プランジャポンプ |
DE4316986A1 (de) * | 1993-05-21 | 1994-11-24 | Teves Gmbh Alfred | Kolbenpumpe |
DE4324689A1 (de) * | 1993-07-23 | 1995-01-26 | Teves Gmbh Alfred | Hydraulische Bremsanlage mit Bremsschlupf- und Antriebsschlupfregelung |
-
1997
- 1997-07-11 DE DE19729791A patent/DE19729791A1/de not_active Ceased
-
1998
- 1998-06-30 EP EP98941252A patent/EP0925446B2/de not_active Expired - Lifetime
- 1998-06-30 WO PCT/DE1998/001789 patent/WO1999002858A1/de active IP Right Grant
- 1998-06-30 JP JP50797799A patent/JP4053094B2/ja not_active Expired - Fee Related
- 1998-06-30 DE DE59809483T patent/DE59809483D1/de not_active Expired - Lifetime
- 1998-06-30 US US09/254,655 patent/US6224350B1/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004028073B3 (de) * | 2004-06-09 | 2005-08-04 | Siemens Ag | Rückschlagventil |
DE102005023323A1 (de) * | 2005-05-20 | 2006-11-23 | Siemens Ag | Rückschlagventil |
Also Published As
Publication number | Publication date |
---|---|
EP0925446A1 (de) | 1999-06-30 |
EP0925446B2 (de) | 2010-10-20 |
WO1999002858A1 (de) | 1999-01-21 |
US6224350B1 (en) | 2001-05-01 |
JP2001500220A (ja) | 2001-01-09 |
DE19729791A1 (de) | 1999-01-14 |
JP4053094B2 (ja) | 2008-02-27 |
DE59809483D1 (de) | 2003-10-09 |
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