EP1347172A2 - Kolbenpumpe - Google Patents
Kolbenpumpe Download PDFInfo
- Publication number
- EP1347172A2 EP1347172A2 EP03004570A EP03004570A EP1347172A2 EP 1347172 A2 EP1347172 A2 EP 1347172A2 EP 03004570 A EP03004570 A EP 03004570A EP 03004570 A EP03004570 A EP 03004570A EP 1347172 A2 EP1347172 A2 EP 1347172A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- connecting rod
- pump according
- contact surface
- piston pump
- 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.)
- Withdrawn
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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
- 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
- F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
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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
- Y10T74/00—Machine element or mechanism
- Y10T74/18—Mechanical movements
- Y10T74/18056—Rotary to or from reciprocating or oscillating
- Y10T74/18296—Cam and slide
-
- 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
- Y10T74/00—Machine element or mechanism
- Y10T74/18—Mechanical movements
- Y10T74/18056—Rotary to or from reciprocating or oscillating
- Y10T74/18296—Cam and slide
- Y10T74/18336—Wabbler type
-
- 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
- Y10T74/00—Machine element or mechanism
- Y10T74/21—Elements
- Y10T74/2101—Cams
- Y10T74/2107—Follower
Definitions
- the invention relates to a piston pump in the preamble of Claim 1 specified genus.
- the fuel should be atomized as finely as possible be injected into the combustion chamber.
- piston pumps in particular compactly constructed radial piston pumps used.
- a radial piston pump with several pump piston produce high, relatively constant pressure.
- radial piston pumps are in a pump housing usually three pump pistons in the radial direction of a camshaft arranged. On the camshaft an eccentric cam is arranged, whose central axis upon rotation of the camshaft to the Camshaft axis is moved.
- a concentric to the eccentric cam arranged polygon ring leads by the rotation of the Camshaft movement in the direction of the longitudinal axis of the Pump piston and a transverse movement.
- the pump piston is pressed by a spring towards the polygon ring. over a Kolbenfußusion is the lifting movement of the polygon ring transferred to the pump piston.
- the transverse movement leads to a relative movement of the polygon ring relative to the Kolbenfußieri. This transverse movement leads to the due to the high pressures occurring large forces between Kolbenfußusion and polygon ring to increased wear.
- the high Frictional forces also worsen the efficiency of known Piston pumps.
- the invention is based on the object, a piston pump of generic type to create a low wear in operation.
- the eccentric cam facing bearing surface advantageously surrounds the eccentric cam facing bearing surface this over an angle of less than 180 °.
- expedient several pump pistons are provided, and the connecting rod elements are independent of at least one angular range other connecting rod elements rotatable about the eccentric center axis.
- the connecting rod element is at a contact surface with the contact surface of the pump piston in contact, wherein at least one of the contact surfaces is convex.
- one of the contact surfaces may be concave is, where the amount of radius of the concave contact surface greater than the amount of the radius of the convex contact surface is.
- the concave and the convex contact surface roll on each other from.
- to minimize the occurring Surface pressure is the difference between the magnitudes of the radii of curvature as low as possible.
- both contact surfaces are convex.
- Appropriately is a Contact surface, in particular the contact surface of the pump piston, just.
- the flat contact surface is expediently vertical arranged to the longitudinal axis of the pump piston.
- the plane Contact surface of the pump piston with respect to the longitudinal axis of the Pump piston is inclined.
- the contact surface of the connecting rod is concentric curved to the central axis of the eccentric cam.
- the concentric Formation of the contact surface causes the introduced Forces directly on the center of the eccentric cam act and no torque acting on the connecting rod element arises around the axis of the eccentric cam.
- at least one contact surface is curved spherically is.
- at least one contact surface is cylindrical curved, in particular, the contact surface with the radius with the smaller amount spherical and the contact surface with the radius with the larger amount cylindrically curved.
- the contact surface of the connecting rod element is convex, wherein the area of the contact surface, the is in contact with the pump piston in the downstroke, a reduced Curvature radius has.
- the reduced radius of curvature in particular smaller than the distance of the contact surface to the center axis of the eccentric cam is leading to a torque on the connecting rod against the dynamic Mass forces acts.
- each connecting element in the circumferential direction Fingers protrude, which is the adjacent one Connecting rod on the outside at a small radial distance spread.
- fingers of each connecting rod element are in Circumferential direction provided on both sides. Because only each is a connecting rod element in the downstroke, the adjacent Connecting elements, in the upward stroke of the pump piston against the Eccentric cam pressed, which is in the downward stroke Fix the connecting rod element.
- the pump piston by means of a spring against the connecting rod element is pressed.
- additional fingers be provided in the event of a spring break as a safety device serve.
- the pump piston positive fit, in particular by means of a clip on the connecting rod element is held. With positive connection of Pump piston and connecting rod element no spring must be provided his.
- At least a guide provided to the relative movement between the connecting rod and the pump piston in the circumferential direction of the eccentric cam.
- Appropriate is the leadership approximately at the height of the contact surfaces and in the circumferential direction arranged approximately in the middle of the Abicalz Kunststoffs, since in this Range the relative movement in the radial direction between Connecting rod element and pump piston is minimal.
- at least one guide arranged on the connecting rod element It can Be advantageous that at least one guide on the pump piston is arranged. In particular, are on both sides in the circumferential direction arranged the contact surfaces guides.
- the guides run especially in the positions in which the pump piston half the upstroke or half the downstroke has traveled, approximately parallel to the piston longitudinal axis. It However, it may also be appropriate that a guide on the pump housing is arranged.
- the Conrod element is designed in several parts, with the individual Segments are arranged in the direction of the piston longitudinal axis and are movable against each other at contact surfaces and in particular the amount of radii of curvature of the contact surfaces in radial direction increases to the outside. As a result, each rolls a convexly curved contact surface on a concavely curved Contact surface off.
- the relevant for the Hertzian pressure effective radius becomes larger here, the smaller the difference of the radii is.
- on the connecting rod element between the connecting rod element and eccentric cam Cup shell is arranged, in particular PTFE-coated is.
- the bearing shell segment is on the Soldered connecting rod element, in particular with soft solder or with low-melting, silver-containing solder.
- that is Bearing shell segment positively, advantageously by bending and / or clipping attached.
- FIGs. 1 and 2 is schematically the coupling of a pump piston 4 to an eccentric cam 3 shown.
- the pump piston 4 is approximately radially to the camshaft axis in a pump housing 1 7 of the camshaft 2 stored.
- the pump piston 4 is via the compression spring 11 in the direction of the camshaft axis 7 tense.
- the compression spring 11 is based on the one Side on the housing 1 and on the other side on an am Pump piston 4 fixed spring plate 17 from.
- an eccentric cam 3 is arranged, whose central axis 10 is radially spaced from the camshaft axis 7.
- the connecting rod element 6 Between eccentric cam 3 and pump piston 4 is a connecting rod element 6 arranged.
- the connecting rod element 6 lies on the am Scope of the eccentric cam 3 arranged bearing sleeve 50 and is movable about the central axis 10 of the eccentric cam 3.
- the bearing surface 54 of the connecting rod element 6 encloses the Eccentric cam less than 180 °.
- At the contact surface 8 is the connecting rod 6 with the contact surface 9 of the pump piston 4 in contact.
- the connecting rod element performs a sinusoidal movement in radial Direction and a transverse sinusoidal movement out.
- the movement in the radial direction is on the Transfer pump piston 4, which performs a lifting movement 5, resulting from a downstroke 5 'and an upstroke 5' ' composed.
- the touch Contact surfaces 8 and 9 at the contact point 20, depending on the training the contact surfaces 8, 9 may also be linear.
- the pump piston 4 is by the spring 11 against the connecting rod 6 and therefore follows the eccentric cam 3 at Downhill 5 '.
- the upstroke 5 '' shown in FIG. 2 is the pump piston 4 via the connecting rod 6 from the eccentric cam 3 pressed against the force of the spring 11 radially outward.
- the contact surfaces 8 roll, 9 from each other.
- Fig. 3 shows a piston pump with three radially about the camshaft axis 7 arranged pump piston 4.
- the eccentric cam 3 On the camshaft 2, the eccentric cam 3 is arranged.
- the connecting elements 6 At the circumference of the eccentric cam 3 distributed three connecting elements 6 are arranged, the each have a bearing shell segment 25, with which they on the eccentric cam 3 can slide.
- the connecting elements 6 are movable against each other.
- the connecting rod elements 6 have a contact surface 8, formed for example of bearing steel or ceramic can be.
- the contact surface 9 of the pump piston 4 is flat formed and perpendicular to the longitudinal axis 12 of the pump piston 4 arranged.
- the contact surface 8 of the connecting rod 6 is curved concentric to the eccentric cam 3. The contact surface 8 is limited in the circumferential direction of guides 13.
- a bead 45 formed on which the spring plate 17 axially in the direction is held on the camshaft 2. It may, however, be beneficial be that the spring plate 17 of a in a groove of the pump piston 4 arranged retaining ring is held.
- the Spring 11 is supported radially inwardly against the spring plate 11 and radially outwardly against an insert 47 from the is fixed to the housing and has a bore 52, in which the pump piston 4 is guided.
- Radial outside of Pump piston 4, the pump chamber 44 is formed in the fuel via a valve 24, in particular as a check valve is formed, can flow.
- An unrepresented Check valve in the drain prevents the during the upstroke 5 '' promoted in the high-pressure vessel Fuel can flow back into the pump chamber 44.
- the eccentric cam 3 When rotating the camshaft 2, the eccentric cam 3 operates via the connecting rod elements 6 successively the pump piston 4. Im Downward stroke 5 'is via the inlet 22 and the valve 24 fuel sucked into the pump chamber 44. The valve in the drain is closed. The pump piston 4 is from the spring 11th pressed against the connecting rod 6. On the upstroke 5 '' pushes the connecting rod element, the piston 4 against the force of Spring 11 and the hydraulic pressure radially outward, causing the arranged in the pump chamber 44 fuel through the on the upstroke 5 '' self-opening check valve is pressed in the process in the high-pressure vessel. During the lifting movement 5 roll the connecting rod 6 and the Pump piston 4 at the contact surfaces 8 and 9 from each other.
- FIGS. 4 and 5 schematically show the acting forces.
- Fig. 4 shows a piston 4 in the upward stroke 5 ''. Due to the sinusoidal movement in the horizontal direction act on the connecting rod 6 dynamic mass forces ⁇ ⁇ ⁇ . The mass forces counteracts the frictional force R between Connecting rod 6 and pump piston 4 acts. In the upstroke 5 '' is the force F and thus the friction force R very large, so that despite the inertial forces ⁇ ⁇ ⁇ no sliding between the connecting rod element 6 and pump piston 4 may occur. Because the contact surface 8 of the connecting rod 6 in the current contact point 20th formed concentric to the central axis 10 of the eccentric cam is the force F acts directly on the central axis 10th The force F corresponds approximately to the pressure of the fuel in the Fig. 3 illustrated pump space 44 multiplied by the Surface of the pump piston 4.
- the force F is also lower due to the lower pressure in the pump chamber 44.
- the dynamic mass force ⁇ * The friction force R also counteracts here. Due to the lower force F but also the friction force R is much lower.
- the contact surface 8 of the connecting rod element 6 has, in the instantaneous contact point 20, a radius which is smaller than the distance between the contact surface 8 and the central axis 10 of the eccentric cam 3. As a result, the force F does not act on the central axis 10, but at a distance 1 to this. As a result, a torque about the central axis 10 is generated, the dynamic mass force ⁇ * counteracts and thus prevents slipping.
- Figs. 6 and 7 is schematically a pump piston 4 in the downward stroke 5 'and in the upward stroke 5' 'shown.
- On the Pump piston 4 are the Abdicalz Schemee in the contact surface. 9 shown.
- the longitudinal axis 12 of the piston 4 faces the camshaft axis 7 a distance a.
- 6 shows the piston 4 in the position in which the pump piston 4 half the down stroke 5 'has covered.
- the distance a between the camshaft axis 7 and piston longitudinal axis 12 leads to a reduction the contact surface in the downstroke 5 '. Because the surface pressures Depending on the contact surface, these are thereby increased. However, since in the downstroke 5 'only small forces on the Pump piston 4 act, this does not lead to unacceptably high Surface pressures.
- a variant is shown schematically.
- the pump piston 14 is guided, whose the connecting rod element 16 facing contact surface 19 with the contact surface 18 of the connecting rod 16 cooperates.
- the Connecting rod 16 is about a bearing cup segment 25 on a Eccentric cam 3 is arranged and is by this as already described operated.
- the spring 11 is in the axial direction fixed by the spring plate 27, which is fixed to the pump piston 14 is.
- guides 23 are arranged, extending from the area the contact surfaces 18 and 19 both in the direction of the Pump piston 14 and in the direction of the connecting rod 16th extend.
- the contact surface 19 of the pump piston 14 is flat and vertical formed to the longitudinal axis 12 of the pump piston 14.
- the Contact surface 18 of the connecting rod 16 is concentric with the Center axis 10 of the eccentric cam 3 curved.
- the at the connecting rod element 16 arranged guide pin 49 engages between the on the spring plate 27 arranged guides 23. In the positions, in which the pump piston 4 half the down stroke 5 'or has traveled half the upstroke 5 '', run the Side walls of the guide pin 49 parallel to the side walls the guides 23.
- the guides 23 is a Relative movement between the connecting rod 16 and the pump piston 14 prevented in the circumferential direction.
- FIG. 9 shows an exemplary embodiment of a connecting rod element 26 shown, which is formed in several parts.
- the connecting rod element 26 has three cup-shaped segments in the radial direction to the eccentric cam 3 are arranged one above the other.
- the inner segment 35 has a contact surface 25, with which it is rotatably mounted on the eccentric cam.
- the segment 35 has a contact surface 42, which is convex and the circumferentially guides 56 has.
- the segment 34 whose outer diameter is approximately the Inner diameter at the contact surface 42 corresponds, is arranged radially outward on the segment 35.
- the segment 35 facing contact surface 41 of the segment 34 is concave arched, wherein the amount of the radius of the contact surface 41st is greater than the amount of the radius of the contact surface 42.
- a contact surface 40 which is convexly curved, this Camber radius and the radius of curvature of the contact surface 41 den have the same center.
- the segment 34 also points in the circumferential direction Guides 57 on. Radially outside the segment 34, the segment 32 is arranged, facing the segment 34 Contact surface 39 is convex and convex on the contact surface 40 rolls while the radially outward facing Contact surface 28 with the pump piston 4 via the contact surface 9 is in contact.
- the segment 32 points in the circumferential direction Guides 33 on.
- the piston pump shown in Fig. 10 corresponds in its Function and its structure largely the piston pump of FIG. 3.
- the connecting elements 36 act via contact surfaces 38 on pump piston 4.
- the movement in the circumferential direction between the connecting rod element 36 and pump piston 4 is by guides 43, the both sides in the circumferential direction of the Contact surfaces 38 are arranged limited.
- the connecting rod elements 36 have circumferentially on both sides of the adjacent arranged connecting rod elements 36 facing noses 37th on, wherein the lugs 37, the respective adjacent connecting rod element 36 overlap at a small radial distance.
- a further embodiment is shown in section.
- the eccentric cam 3 In the radial direction of the eccentric cam 3 are three Pleuel institute 46 arranged over the bearing shell segments 25th are stored on this.
- the radially outwardly facing contact surfaces 48 of the connecting elements 46 are concentric with Center axis 10 of the eccentric cam 3 curved and roll on the contact surfaces 9 of the pump piston 4 from.
- the two To a relative movement between pump piston 4 and connecting rod 46 to prevent a stop 51 is arranged on the housing, the two has lateral guides 53. To these guides 53 can in the circumferential direction, the adjacent connecting elements 46 and this in turn the middle connecting rod 46 in its extreme positions abut, so that a sliding of the contact surfaces 9 and 48 avoided each other.
- the connecting rods are advantageous from inexpensive Material produced by machining, molding or casting. in the Area of the contact surfaces have the connecting elements advantageous an insert made of hard and wear-resistant material on. This can be advantageous rolling bearing steel or ceramic.
- the bearing shell segments between the connecting rod element and eccentric cam 3 are arranged, are expedient with a Layer with good emergency running properties, for example PTFE, coated.
- the bearing shell segments can in particular with low-melting solder, for example soft solder or silver-containing Lot with a melting point of about 220 C °, on the Soldered connecting rod elements.
- the circumference of the eccentric cam a Bearing sleeve is applied, in particular, shrunk may be and be coated with PTFE, for example can.
- the connecting rods are in the direction of the central axis 10 of the eccentric cam 3 conveniently through the walls of the pump housing 1 stored. However, it may also be appropriate, the connecting rod elements via the pump piston 4 by appropriate connection to store.
- the contact surfaces can be in the direction of the central axis 10 be formed so that flat or give cylindrical contact surfaces. However, it can also be beneficial be that the contact surfaces in the direction of the central axis 10 are curved, resulting in particular spherical result in curved contact surfaces.
- the contact surface is advantageous Spherical with the smaller radius amount and the with the larger radius amount cylindrically curved.
Abstract
Description
- Fig. 1
- eine schematische Darstellung einer Kolbenpumpe mit zwischen Pumpenkolben und Exzenternocken angeordnetem Pleuelelement im Abwärtshub,
- Fig. 2
- eine schematische Darstellung der Kolbenpumpe aus Fig. 3 im Aufwärtshub,
- Fig. 3
- einen Schnitt durch eine Kolbenpumpe mit drei radial angeordneten Pumpenkolben,
- Fig. 4
- in Schnittdarstellung einen Ausschnitt einer Kolbenpumpe im Aufwärtshub,
- Fig. 5
- der Ausschnitt aus Fig. 4 mit dem Pumpenkolben im Abwärt shub,
- Fig. 6
- eine schematische Darstellung von Pumpenkolben, Pleuelelement und Exzenternocken mit Achsversatz zwischen Pumpenkolben und Nockenwellenachse im Abwärtshub,
- Fig. 7
- eine schematische Darstellung der Anordnung aus Fig. 6 im Aufwärtshub,
- Fig. 8
- eine schematische Darstellung einer Ausführungsvariante von Pumpenkolben, Federteller mit Führung für das Pleuelelement und Pleuelelement,
- Fig. 9
- eine schematische Darstellung einer weiteren Ausführungsvariante des Pleuelelements,
- Fig. 10
- eine Schnittdarstellung einer weiteren Ausführungsvariante eines Pleuelelements,
- Fig. 11
- eine Schnittdarstellung einer weiteren Ausführungsvariante der Pleuelelemente und der Führungen.
Claims (32)
- Kolbenpumpe, insbesondere Reihen- oder Radialkolbenpumpe zur Kraftstoffhochdruckerzeugung bei Common-Rail-Einspritzsystemen mit einer in einem Pumpengehäuse (1) drehbar gelagerten Nockenwelle (2), die mindestens einen Exzenternocken (3) aufweist, wobei dem Exzenternocken (3) mindestens ein Pumpenkolben (4, 14) zugeordnet ist, der vom Exzenternocken (3) betätigt ist und der in etwa radialer Richtung zur Nockenwelle (2) eine Hubbewegung (5) ausführen kann, die einen zur Nockenwelle (2) gerichteten Abwärtshub (5') und einen entgegengesetzt gerichteten Aufwärtshub (5'') umfaßt,
dadurch gekennzeichnet, daß zwischen jedem Pumpenkolben (4, 14) und dem Exzenternocken (3) ein Pleuelelement (6, 16, 26, 36, 46) angeordnet ist, welches durch Abwälzen die Hubbewegung (5) und die Kraft auf den Pumpenkolben (4, 14) überträgt. - Kolbenpumpe nach Anspruch 1,
dadurch gekennzeichnet, daß die dem Exzenternocken (3) zugeordnete Lagerfläche (54) des Pleuelelements (6, 16, 26, 36, 46) den Exzenternocken (3) über einen Winkel von weniger als 180° umgreift. - Kolbenpumpe nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß mehrere Pumpenkolben (4, 14) vorgesehen sind und jedes Pleuelelement (6, 16, 26, 36, 46) mindestens in einem Winkelbereich unabhängig von anderen Pleuelelementen (6, 16, 26, 36, 46) um die Mittelachse (10) des Exzenternockens (3) drehbar ist. - Kolbenpumpe nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß das Pleuelelement (6, 16, 26, 36, 46) an einer Kontaktfläche (8, 18, 28, 38, 48) mit der Kontaktfläche (9, 19) des Pumpenkolbens (4, 14) in Kontakt ist, wobei mindestens eine der Kontaktflächen (8, 18, 28, 38, 48; 9, 19) konvex ausgebildet ist. - Kolbenpumpe nach Anspruch 4,
dadurch gekennzeichnet, daß eine der Kontaktflächen (8, 18, 28, 38, 48; 9, 19) konkav ist, wobei der Betrag des Radius der konkaven Kontaktfläche größer als der Betrag des Radius der konvexen Kontaktfläche ist. - Kolbenpumpe nach Anspruch 4,
dadurch gekennzeichnet, daß beide Kontaktflächen (8, 18, 28, 38, 48; 9, 19) konvex sind. - Kolbenpumpe nach Anspruch 4,
dadurch gekennzeichnet, daß eine Kontaktfläche, insbesondere die Kontaktfläche (9, 19) des Pumpenkolbens (4, 14), eben ist. - Kolbenpumpe nach Anspruch 7,
dadurch gekennzeichnet, daß die Kontaktfläche (9, 19) des Pumpenkolbens (4, 14) eben und senkrecht zur Längsachse (12) des Pumpenkolbens (4, 14) ausgebildet ist. - Kolbenpumpe nach Anspruch 7,
dadurch gekennzeichnet, daß die Kontaktfläche (9, 19) des Pumpenkolbens (4, 14) eben und gegenüber der Längsachse (12) des Pumpenkolbens (4, 14) geneigt ist. - Kolbenpumpe nach einem der Ansprüche 4 bis 9,
dadurch gekennzeichnet, daß die Kontaktfläche (8, 18, 28, 38, 48) des Pleuelelements (6, 16, 26, 36, 46) konzentrisch zur Mittelachse (10) des Exzenternockens (3) gekrümmt ist. - Kolbenpumpe nach einem der Ansprüche 4 bis 10,
dadurch gekennzeichnet, daß mindestens eine Kontaktfläche (8, 18, 28, 38, 48; 9, 19) sphärisch gekrümmt ist. - Kolbenpumpe nach einem der Ansprüche 4 bis 11,
dadurch gekennzeichnet, daß mindestens eine Kontaktfläche (8, 18, 28, 38, 48; 9, 19) zylindrisch gekrümmt ist. - Kolbenpumpe nach einem der Ansprüche 4 bis 12,
dadurch gekennzeichnet, daß die Kontaktfläche mit dem Radius mit dem kleineren Betrag sphärisch und die Kontaktfläche mit dem Radius mit dem größeren Betrag zylindrisch gekrümmt ist. - Kolbenpumpe nach einem der Ansprüche 4 bis 13,
dadurch gekennzeichnet, daß die Kontaktfläche (8, 18, 28, 38, 48) des Pleuelelements (6, 16, 26, 36, 46) konvex ist, wobei der Bereich der Kontaktfläche (8, 18, 28, 38, 48), der mit dem Pumpenkolben (4, 14) im Abwärtshub (5') in Kontakt ist, einen verkleinerten Krümmungsradius aufweist. - Kolbenpumpe nach einem der Ansprüche 1 bis 14,
dadurch gekennzeichnet, daß mehrere Pleuelelemente (6, 16, 26, 36, 46) am Umfang des Exzenternockens (3) verteilt angeordnet sind. - Kolbenpumpe nach Anspruch 15,
dadurch gekennzeichnet, daß von jedem Pleuelelement (36) in Umfangsrichtung Finger (37) ragen, die das jeweilige benachbarte Pleuelelement (36) an der Außenseite in geringem radialen Abstand übergreifen. - Kolbenpumpe nach einem der Ansprüche 1 bis 16,
dadurch gekennzeichnet, daß der Pumpenkolben (4, 14) mittels einer Feder (11) gegen das Pleuelelement (6, 16, 26, 36, 46) gedrückt ist. - Kolbenpumpe nach einem der Ansprüche 1 bis 17,
dadurch gekennzeichnet, daß der Pumpenkolben (4, 14) formschlüssig, insbesondere mittels eines Clip, am Pleuelelement gehalten ist. - Kolbenpumpe nach einem der Ansprüche 1 bis 18,
dadurch gekennzeichnet, daß die Längsachse (12) des Pumpenkolbens (4) zur Nockenwellenachse (7) einen Abstand (a) aufweist. - Kolbenpumpe nach einem der Ansprüche 1 bis 19,
dadurch gekennzeichnet, daß mindestens eine Führung (13, 23, 33, 43, 53) vorgesehen ist, die die Relativbewegung zwischen Pleuelelement (6, 16, 26, 36, 46) und Pumpenkolben (4, 14) in Umfangsrichtung des Exzenternockens (3) begrenzt. - Kolbenpumpe nach Anspruch 20,
dadurch gekennzeichnet, daß die Führung (13) etwa auf der Höhe der Kontaktflächen (8, 18, 28, 38, 48; 9, 19) angeordnet ist. - Kolbenpumpe nach Anspruch 20 oder 21,
dadurch gekennzeichnet, daß mindestens eine Führung (13, 33, 43) am Pleuelelement (6, 26, 36) angeordnet ist. - Kolbenpumpe nach einem der Ansprüche 20 bis 223,
dadurch gekennzeichnet, daß mindestens eine Führung (23) am Pumpenkolben (4, 14) angeordnet ist. - Kolbenpumpe nach einem der Ansprüche 20 bis 23,
dadurch gekennzeichnet, daß in Umfangsrichtung beidseitig der Kontaktflächen (8, 18, 28, 38, 48; 9, 19) Führungen (13, 23, 33, 43) angeordnet sind. - Kolbenpumpe nach einem der Ansprüche 20 bis 24,
dadurch gekennzeichnet, daß in den Stellungen, in denen der Pumpenkolben (4) den halben Aufwärtshub (5'') oder den halben Abwärtshub (5') zurückgelegt hat, die Führungen (13, 33, 43) annähernd parallel zur Längsachse (12) verlaufen. - Kolbenpumpe nach Anspruch 20,
dadurch gekennzeichnet, daß eine Führung (53) am Pumpengehäuse (1) angeordnet ist. - Kolbenpumpe nach einem der Ansprüche 1 bis 26,
dadurch gekennzeichnet, daß das Pleuelelement (26) mehrteilig ausgebildet ist, wobei die einzelnen Segmente (32, 34, 35) in Richtung der Kolbenlängsachse (12) angeordnet sind und gegeneinander an Kontaktflächen (39, 40, 41, 42) beweglich sind und wobei insbesondere der Betrag der Krümmungsradien der Kontaktflächen (39, 40, 41, 42) in radialer Richtung nach außen zunimmt. - Kolbenpumpe nach einem der Ansprüche 1 bis 27,
dadurch gekennzeichnet, daß das Pleuelelement (6, 16, 26, 36, 46) im Bereich der Kontaktfläche (8, 18, 28, 38, 48) einen Einsatz aus verschleißfestem Material, insbesondere aus Wälzlagerstahl oder aus Keramik, besitzt. - Kolbenpumpe nach einem der Ansprüche 1 bis 28,
dadurch gekennzeichnet, daß am Pleuelelement (6, 16, 26, 36, 46) zwischen Pleuelelement (6, 16, 26, 36, 46) und Exzenternocken (3) ein Lagerschalensegment (25) angeordnet ist, daß insbesondere PTFE-beschichtet ist. - Kolbenpumpe nach Anspruch 29,
dadurch gekennzeichnet, daß das Lagerschalensegment (25) auf das Pleuelelement (6, 16, 26, 36, 46) aufgelötet ist, insbesondere mit Weichlot oder mit niedrigschmelzendem, silberhaltigem Lot. - Kolbenpumpe nach Anspruch 29,
dadurch gekennzeichnet, daß das Lagerschalensegment (25) auf dem Pleuelelement (6, 16, 26, 36, 46) formschlüssig, insbesondere durch Umbiegen und/oder Aufclipsen, befestigt ist. - Kolbenpumpe nach einem der Ansprüche 1 bis 31,
dadurch gekennzeichnet, daß am Umfang des Exzenternockens (3) eine Lagerhülse (50) angeordnet ist, die insbesondere mit PTFE beschichtet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10212492 | 2002-03-21 | ||
DE10212492A DE10212492B4 (de) | 2002-03-21 | 2002-03-21 | Kolbenpumpe |
Publications (2)
Publication Number | Publication Date |
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EP1347172A2 true EP1347172A2 (de) | 2003-09-24 |
EP1347172A3 EP1347172A3 (de) | 2004-12-08 |
Family
ID=27771460
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03004570A Withdrawn EP1347172A3 (de) | 2002-03-21 | 2003-02-28 | Kolbenpumpe |
Country Status (3)
Country | Link |
---|---|
US (1) | US6991438B2 (de) |
EP (1) | EP1347172A3 (de) |
DE (1) | DE10212492B4 (de) |
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WO2007141058A1 (de) * | 2006-06-06 | 2007-12-13 | Continental Automotive Gmbh | Fluidpumpe mit kurbeltrieb |
EP1985853A1 (de) * | 2007-04-17 | 2008-10-29 | Golle Motor AG | Radialkolbenpumpe, insbesondere für Common Rail (CR)-Einspritzsysteme |
WO2013117485A1 (en) * | 2012-02-09 | 2013-08-15 | Delphi Technologies Holding S.À.R.L. | Improvements relating to fuel pumps |
EP2910769A1 (de) * | 2014-02-25 | 2015-08-26 | Delphi International Operations Luxembourg S.à r.l. | Brennstoffpumpmechanismus |
WO2016058877A1 (de) * | 2014-10-15 | 2016-04-21 | Continental Automotive Gmbh | Antriebsvorrichtung zum antreiben einer kraftstoffhochdruckpumpe sowie kraftstoffhochdruckpumpe |
CN106062354A (zh) * | 2014-10-14 | 2016-10-26 | 大陆汽车有限公司 | 燃料泵 |
US10174731B2 (en) | 2014-10-15 | 2019-01-08 | Continental Automotive Gmbh | High pressure pump for a fuel injection system of an internal combustion engine |
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DE20313014U1 (de) * | 2003-08-21 | 2004-12-23 | Robert Bosch Gmbh | Hochdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine |
US7134846B2 (en) * | 2004-05-28 | 2006-11-14 | Stanadyne Corporation | Radial piston pump with eccentrically driven rolling actuation ring |
US7503291B2 (en) * | 2005-03-09 | 2009-03-17 | Kiss Engineering, Inc. | Reciprocating device with dual chambered cylinders |
CA2511254C (en) * | 2005-08-04 | 2007-04-24 | Westport Research Inc. | High-pressure gas compressor and method of operating a high-pressure gas compressor |
US20100119393A1 (en) * | 2008-11-12 | 2010-05-13 | Delphi Technologies, Inc. | Hydraulic pump assembly |
US20130084198A1 (en) * | 2011-10-04 | 2013-04-04 | Woodward, Inc. | Pump with centralized spring forces |
EP2628942B1 (de) * | 2012-02-14 | 2014-10-01 | Continental Automotive GmbH | Pumpe und Common-Rail-Kraftstoffeinspritzsystem |
JP6293994B2 (ja) * | 2012-10-31 | 2018-03-14 | 日立オートモティブシステムズ株式会社 | 高圧燃料供給ポンプ |
DE102013200548A1 (de) * | 2013-01-16 | 2014-07-17 | Continental Teves Ag & Co. Ohg | Kolbenpumpe |
DE102015200310A1 (de) * | 2015-01-13 | 2016-07-14 | Robert Bosch Gmbh | Kolbeneinheit und hydrostatische Radialkolbenmaschine |
DE102015203276A1 (de) * | 2015-02-24 | 2016-08-25 | Continental Teves Ag & Co. Ohg | Kolbenpumpe |
GB201517504D0 (en) * | 2015-10-05 | 2015-11-18 | Delphi Internat Operations Luxembourg S À R L | Pumping assembly |
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WO2007141058A1 (de) * | 2006-06-06 | 2007-12-13 | Continental Automotive Gmbh | Fluidpumpe mit kurbeltrieb |
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WO2013117485A1 (en) * | 2012-02-09 | 2013-08-15 | Delphi Technologies Holding S.À.R.L. | Improvements relating to fuel pumps |
EP2910769A1 (de) * | 2014-02-25 | 2015-08-26 | Delphi International Operations Luxembourg S.à r.l. | Brennstoffpumpmechanismus |
WO2015128133A1 (en) * | 2014-02-25 | 2015-09-03 | Delphi International Operations Luxembourg S.À R.L. | Fuel pumping mechanism |
KR102156134B1 (ko) | 2014-02-25 | 2020-09-16 | 델피 테크놀로지스 아이피 리미티드 | 연료 펌핑 메커니즘 |
CN106103969B (zh) * | 2014-02-25 | 2018-09-18 | 德尔福国际业务卢森堡公司 | 燃料泵送机构 |
KR20160123313A (ko) * | 2014-02-25 | 2016-10-25 | 델피 인터내셔널 오퍼레이션즈 룩셈부르크 에스.에이 알.엘. | 연료 펌핑 메커니즘 |
CN106103969A (zh) * | 2014-02-25 | 2016-11-09 | 德尔福国际业务卢森堡公司 | 燃料泵送机构 |
CN106062354A (zh) * | 2014-10-14 | 2016-10-26 | 大陆汽车有限公司 | 燃料泵 |
CN106062354B (zh) * | 2014-10-14 | 2018-02-06 | 大陆汽车有限公司 | 燃料泵 |
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CN105992869A (zh) * | 2014-10-15 | 2016-10-05 | 大陆汽车有限公司 | 用于驱动高压燃料泵的驱动装置以及高压燃料泵 |
US10174731B2 (en) | 2014-10-15 | 2019-01-08 | Continental Automotive Gmbh | High pressure pump for a fuel injection system of an internal combustion engine |
US10208725B2 (en) | 2014-10-15 | 2019-02-19 | Continental Automotive Gmbh | High pressure fuel pump and associated drive device |
WO2016058877A1 (de) * | 2014-10-15 | 2016-04-21 | Continental Automotive Gmbh | Antriebsvorrichtung zum antreiben einer kraftstoffhochdruckpumpe sowie kraftstoffhochdruckpumpe |
Also Published As
Publication number | Publication date |
---|---|
DE10212492B4 (de) | 2012-02-02 |
US20030180159A1 (en) | 2003-09-25 |
EP1347172A3 (de) | 2004-12-08 |
DE10212492A1 (de) | 2003-10-02 |
US6991438B2 (en) | 2006-01-31 |
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