WO2012059315A1 - Pump, in particular high-pressure fuel pump - Google Patents

Pump, in particular high-pressure fuel pump Download PDF

Info

Publication number
WO2012059315A1
WO2012059315A1 PCT/EP2011/068097 EP2011068097W WO2012059315A1 WO 2012059315 A1 WO2012059315 A1 WO 2012059315A1 EP 2011068097 W EP2011068097 W EP 2011068097W WO 2012059315 A1 WO2012059315 A1 WO 2012059315A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
drive shaft
support element
roller
pump piston
Prior art date
Application number
PCT/EP2011/068097
Other languages
German (de)
French (fr)
Inventor
Matthias Greiner
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to CN201180052756.5A priority Critical patent/CN103201499B/en
Priority to EP11770768.7A priority patent/EP2635797B1/en
Publication of WO2012059315A1 publication Critical patent/WO2012059315A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • 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
    • F04B1/0413—Cams
    • F04B1/0417—Cams consisting of two or more cylindrical elements, e.g. rollers
    • 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
    • F04B1/043—Hydraulic arrangements
    • 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
    • F04B1/0439—Supporting or guiding means for the pistons

Definitions

  • the invention relates to a pump, in particular high-pressure fuel pump, according to the preamble of claim 1.
  • a pump in the form of a high-pressure fuel pump is through the
  • This pump has a pump element with a pump piston, which is guided in a cylinder bore of a housing part and which is driven by a drive shaft in a lifting movement.
  • the drive shaft has for this purpose a cam or eccentric.
  • the pump piston is supported via a support element in the form of a roller shoe and a roller rotatably mounted in this on the drive shaft.
  • the pump piston and the support element are acted upon by a helical compression spring to the drive shaft.
  • the pump piston and the support member are inserted into a ram tube which is slidably guided in a bore of a housing part with little play in the direction of the stroke movement of the pump piston.
  • the support member with the roller and the ram tube together form a roller tappet, by which the rotational movement of the drive shaft is converted into a stroke movement of the pump piston.
  • the helical compression spring is held at its end facing the drive shaft on the support element and at its end facing away from the drive shaft on a housing part about its longitudinal axis held non-rotatably.
  • roller tappet By the roller tappet are arranged in the bore of the housing part above and below the roller tappet spaces separated. In the support element therefore continuous openings are required to between these spaces the lifting movement of the roller tappet to allow a volume or pressure compensation. Through these openings of the support element, the production is also complicated and the strength of the support element is possibly reduced.
  • the pump according to the invention with the features of claim 1 has the advantage that their production is simplified because no ram tube and no hole in a housing part are required. In addition, no through openings in the support element for pressure and volume compensation are required because no tight guide between the support member and a housing part is present.
  • FIG. 2 shows a section of the pump, designated by I I in FIG. 1, in an enlarged view
  • Figure 3 shows the pump fragmentary in a cross section along line
  • Figure 4 shows the pump fragmentary in a view in the direction of arrow IV in
  • FIG. 2 is a diagrammatic representation of FIG. 1
  • Figure 5 shows the pump fragmentary in a section along line V-V in
  • Figure 6 shows the pump fragmentary in a view in the direction of arrow VI in
  • FIG. 1 A first figure.
  • FIGS. 1 to 6 show a pump which is in particular a high-pressure fuel pump for a fuel injection device of an internal combustion engine.
  • the pump has a housing 10, which may be designed in several parts and in which a rotationally driven drive shaft 14 is rotatably mounted about an axis of rotation 15.
  • the drive shaft 14 has at least one cam 16, which may also be a multiple cam.
  • the pump has at least one or more pump elements 18, each having a pump piston 20 which is at least indirectly driven by the cam 16 of the drive shaft 14 in a lifting movement in at least approximately radial direction to the axis of rotation 15 of the drive shaft 14 and in the direction of the longitudinal axis 21 of the pump piston 20 becomes.
  • the pump does not have its own drive shaft 14 and the pump piston 20 of the pump element 18 is driven by a shaft of the internal combustion engine having a cam 16 or eccentric.
  • the pump piston 20 is tightly guided in a cylinder bore 22 of a housing part 24 of the pump.
  • the housing part 24 has a flange-like region 25 and a cylindrical projection 26 protruding therefrom towards the drive shaft 14, in which the cylinder bore 22 extends. With its end facing away from the drive shaft 14, the pump piston 20 in the cylinder bore 22 defines a pump working space 28.
  • the pump working space 28 has an inlet check valve 30 opening into this connection with an inlet 32 leading, for example, from a feed pump, via which the pump working space 28 radially inward to the axis of rotation 15 of the drive shaft 14 directed suction stroke of the pump piston 20 is filled with fuel.
  • the pump working chamber 28 also has an outlet check valve 34 which opens out of this connection with a drain 36, which for example leads to a high-pressure fuel accumulator 38 and fuel via the delivery stroke of the pump piston 20 directed radially outward from the rotation axis 15 of the drive shaft 14 the pump working space 28 is displaced.
  • the pump piston 20 is supported indirectly via a support element in the form of a roller shoe 42 on the cam 16 of the drive shaft 14.
  • the roller shoe 42 has on its side facing the drive shaft 14 a concave curved
  • Recess 44 in which an at least approximately circular cylindrical roller 46 is rotatably mounted, wherein the axis of rotation of the roller 46 is denoted by 48.
  • the roller 46 extends on the cam 16 of the drive shaft 14 from.
  • the housing 10 of the high-pressure fuel pump is filled with fuel and the fuel is lubricated between the roller 46 and the recess 44 of the roller shoe
  • roller shoe 42 The roller shoe 42 and the associated pump piston 20 are acted upon by a prestressed spring in the form of a cylindrical helical compression spring 50 to the drive shaft 14, so that the roller 46 is held in contact with the cam 16.
  • the helical compression spring 50 surrounds the projection 26 of the housing part 24 and the longitudinal axis is at least approximately identical to the longitudinal axis 21 of the pump piston 20. From the flange portion 25 of the housing part 24 is inwardly, the neck 26 coaxially surrounding a collar 52 protruding. The collar 52 has, as shown in FIG. axis 21 of the pump piston 20 extending groove 54. The end of the spring 50 protrudes into the annulus formed between the boss 26 and the collar 52 and the end portion 56 of the last turn of the spring 50 is bent radially outward from the longitudinal axis 21 and projects into the groove 54. The spring 50 is thus non-rotatably connected to the housing part 24 via the end region 56 of its last turn about the longitudinal axis 21.
  • the roller shoe 42 is approximately cylindrical in shape with a round cross-section, the recess 44 being provided on its side facing the drive shaft 14. On the side facing away from the drive shaft 14 of the roller shoe
  • the pump piston 20 is firmly connected to the roller shoe 42, in particular by the end region of the pump piston 20 being pressed into the bore 58 of the roller shoe 42.
  • Roller shoe 42 is a reduced in diameter relative to the roller shoe 42 collar 60 which projects into the drive shaft 14 facing the end of the spring 50.
  • a groove 62 extending in the direction of the longitudinal axis 21 is formed on the circumference of the collar 60, and the end region 64 of the last turn of the spring 50 is bent inwards radially to the longitudinal axis 21 and protrudes into the groove 62.
  • the spring 50 is thus non-rotatably connected to the roller shoe 42 about the end portion 64 of its last turn about the longitudinal axis 21.
  • the recess 44 in the roller shoe 42 is for example formed so that it as shown in Figure 3, the roller 46 on the circumference of an angle ⁇ of at most 180 ° surrounds.
  • the recess 44 surrounds the roller 46 for less than 180 °, in particular about 140 °.
  • a holding element 66 is provided, which is arranged on the drive shaft 14 facing side of the roller shoe 42 and on
  • Roller shoe 42 is attached.
  • the roller shoe 42 has, on its side facing the drive shaft 14, a recess 68 which is circular in cross-section, for example.
  • the holding element 66 is disc-shaped with the recess 68 corresponding cross-section and inserted into the recess 68, in particular pressed into the recess 68.
  • the holding element 66 has, as shown in Figures 3 and 5, a slot-shaped opening 70, through which the roller 46 projects toward the drive shaft 14, wherein the width of the slot 70 in the radial direction with respect to the axis of rotation 48 of the roller 46 is smaller than the diameter the roller 46, so that the roller 46 can not pass through the slot 70.
  • the holding member 66 comes in its final assembled end position at the bottom 69 of the recess 68 of the roller shoe 42 for conditioning without the holding member 66 presses against the roller 46.
  • the lateral edges 71 of the slot 70 may be bevelled as shown in Figure 3, wherein the width of the slot 70 increases toward the roller 46 out.
  • the bevel of the edges 71 of the slot 70 sharp edges are avoided during start-up of the roller 46.
  • the lateral edges 71 of the slot 70 may also be rounded.
  • the length of the slot 70 in the direction of the axis of rotation 48 of the roller 46 is only slightly larger than the length of the roller 46.
  • the holding member 66 holds the roller 46 in the recess 44 of the roller shoe 42 and forms a support for the roller 46, on which Roller 46 can come to rest in the direction of its axis of rotation 48.
  • the holding element 66 is preferably made of a material with high wear resistance, for example hard metal or ceramic.
  • the pointing in the direction of its axis of rotation 48 axial ends 47 of the roller 46, with which they can start on the support member 66 may be formed convex rounded.
  • the support member 42 is guided only via the pump piston 20 in the direction of the lifting movement of the pump piston 20 and has no guide in a housing part. A sufficiently large distance is present between the support element 42 and the surrounding housing part, so that fuel can flow between the underside of the drive shaft 14 and the top side of the support element 42 facing away from the drive shaft 14.
  • the support member 42 and the support member 66 need therefore have no through openings, which allow a flow through the support member 42 and the support member 66 between the bottom and top. If necessary, the support member 42 and the retainer 66 may still be provided with apertures 74 to facilitate flow therethrough.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

The pump has at least one pump element (18), having a pump piston (20) which is guided in a cylinder bore (22) of a housing part (24) and is driven indirectly by a drive shaft (14) in a reciprocating movement. The pump piston (20) is supported on the drive shaft (14) via a supporting element (42) and a roller (46) which is mounted rotatably in the supporting element (42), wherein the supporting element (42) is guided at least indirectly in the direction of the reciprocating movement of the pump piston (20). The supporting element (42) and the pump piston (20) are loaded towards the drive shaft (14) by a spring (50), wherein, at its end which faces the drive shaft (14), the spring (50) is connected to the supporting element (42) such that it cannot be rotated about its longitudinal axis (21) and, at its end which faces away from the drive shaft (14), is connected to a housing part (24) such that it cannot be rotated about its longitudinal axis (21). The pump piston (20) is connected fixedly to the supporting element (42), and the supporting element (42) is guided only via the pump piston (20) in the direction of the reciprocating movement of the pump piston (20).

Description

Beschreibung  description
Titel title
Pumpe, insbesondere Kraftstoffhochdruckpumpe Stand der Technik  Pump, in particular high-pressure fuel pump prior art
Die Erfindung geht aus von einer Pumpe, insbesondere Kraftstoffhochdruckpumpe, nach der Gattung des Anspruchs 1. Eine solche Pumpe in Form einer Kraftstoffhochdruckpumpe ist durch dieThe invention relates to a pump, in particular high-pressure fuel pump, according to the preamble of claim 1. Such a pump in the form of a high-pressure fuel pump is through the
DE 10 2008 000 699 AI bekannt. Diese Pumpe weist ein Pumpenelement mit einem Pumpenkolben auf, der in einer Zylinderbohrung eines Gehäuseteils geführt ist und der durch eine Antriebswelle in einer Hubbewegung angetrieben wird. Die Antriebswelle weist hierzu einen Nocken oder Exzenter auf. Der Pumpenkolben stützt sich über ein Stützelement in Form eines Rollenschuhs und eine in diesem drehbar gelagerte Rolle an der Antriebswelle ab. Der Pumpenkolben und das Stützelement sind durch eine Schraubendruckfeder zur Antriebswelle hin beaufschlagt. Der Pumpenkolben und das Stützelement sind in ein Stößelrohr eingesetzt, das in einer Bohrung eines Gehäuseteils mit geringem Spiel in Richtung der Hubbewegung des Pumpenkolbens verschiebbar geführt ist. Das Stützelement mit der Rolle und das Stößelrohr bilden zusammen einen Rollenstößel, durch den die Drehbewegung der Antriebswelle in eine Hubbewegung des Pumpenkolbens umgesetzt wird. Die Schraubendruckfeder ist an ihrem der Antriebswelle zugewandten Ende am Stützelement und an ihrem der Antriebswelle abge- wandten Ende an einem Gehäuseteil um ihre Längsachse unverdrehbar gehalten. Hierdurch wird ein Verdrehen des Stützelements um die Längsachse des Pumpenkolbens und der Schraubendruckfeder verhindert und sichergestellt, dass die Drehachse der Rolle parallel zur Drehachse der Antriebswelle verläuft. Durch das zusätzliche Stößelrohr und die im Gehäuseteil zu dessen Führung erforderli- che Bohrung ist die Fertigung der Pumpe aufwendig und teuer. Durch den Rollenstößel werden in der Bohrung des Gehäuseteils oberhalb und unterhalb des Rollenstößels angeordnete Räume voneinander getrennt. Im Stützelement sind daher durchgehende Öffnungen erforderlich, um zwischen diesen Räumen bei der Hubbewegung des Rollenstößels einen Volumen- bzw. Druckausgleich zu ermöglichen. Durch diese Öffnungen des Stützelement ist die Fertigung ebenfalls aufwendig und die Festigkeit des Stützelements wird unter Umständen verringert. DE 10 2008 000 699 AI known. This pump has a pump element with a pump piston, which is guided in a cylinder bore of a housing part and which is driven by a drive shaft in a lifting movement. The drive shaft has for this purpose a cam or eccentric. The pump piston is supported via a support element in the form of a roller shoe and a roller rotatably mounted in this on the drive shaft. The pump piston and the support element are acted upon by a helical compression spring to the drive shaft. The pump piston and the support member are inserted into a ram tube which is slidably guided in a bore of a housing part with little play in the direction of the stroke movement of the pump piston. The support member with the roller and the ram tube together form a roller tappet, by which the rotational movement of the drive shaft is converted into a stroke movement of the pump piston. The helical compression spring is held at its end facing the drive shaft on the support element and at its end facing away from the drive shaft on a housing part about its longitudinal axis held non-rotatably. As a result, rotation of the support element about the longitudinal axis of the pump piston and the helical compression spring is prevented and ensured that the axis of rotation of the roller is parallel to the axis of rotation of the drive shaft. Due to the additional ram tube and the bore required in the housing part for its guidance, the production of the pump is complicated and expensive. By the roller tappet are arranged in the bore of the housing part above and below the roller tappet spaces separated. In the support element therefore continuous openings are required to between these spaces the lifting movement of the roller tappet to allow a volume or pressure compensation. Through these openings of the support element, the production is also complicated and the strength of the support element is possibly reduced.
Offenbarung der Erfindung Disclosure of the invention
Vorteile der Erfindung Advantages of the invention
Die erfindungsgemäße Pumpe mit den Merkmalen gemäß Anspruch 1 hat demgegenüber den Vorteil, dass deren Fertigung vereinfacht ist, da kein Stößelrohr und keine Bohrung in einem Gehäuseteil erforderlich sind. Darüber hinaus sind keine durchgehenden Öffnungen im Stützelement zum Druck- und Volumenausgleich erforderlich, da keine enge Führung zwischen dem Stützelement und einem Gehäuseteil vorhanden ist. The pump according to the invention with the features of claim 1 has the advantage that their production is simplified because no ram tube and no hole in a housing part are required. In addition, no through openings in the support element for pressure and volume compensation are required because no tight guide between the support member and a housing part is present.
In den abhängigen Ansprüchen sind vorteilhafte Ausgestaltungen und Weiterbildungen der erfindungsgemäßen Pumpe angegeben. Durch die Ausbildung gemäß Anspruch 2 ist eine einfache und sichere Verbindung des Pumpenkolbens mit dem Stützelement ermöglicht. Durch die Ausbildung gemäß Anspruch 3 ist die Rolle auf einfache Weise im Stützelement gehalten. Durch die Ausbildung gemäß Anspruch 4 ist sichergestellt, dass die Rolle in der Vertiefung des Stützelements nicht verkantet. Die Ausbildung gemäß Anspruch 5 ermöglicht eine einfache Befestigung des Halteelements am Stützelement. Durch die Ausbildung gemäß Anspruch 6 ist eine Abstützung der Rolle in axialer Richtung auf einfache Weise erreicht, die mit der Weiterbildung gemäß Anspruch 7 eine hohe Verschleißfestigkeit aufweist. Durch die Ausbildung gemäß Anspruch 8 ist eine verdrehfeste Verbindung der Feder auf einfache Weise erreicht. Die Ausbildung gemäß Anspruch 9 ermöglicht eine kostengünstige Herstellung des Stützelements und des Halteelements. In the dependent claims advantageous refinements and developments of the pump according to the invention are given. Due to the design according to claim 2, a simple and secure connection of the pump piston with the support element is made possible. Due to the design according to claim 3, the roller is held in a simple manner in the support element. The embodiment according to claim 4 ensures that the roller is not tilted in the recess of the support member. The embodiment according to claim 5 allows easy attachment of the retaining element on the support element. Due to the construction according to claim 6, a support of the roller in the axial direction is achieved in a simple manner, which has a high wear resistance with the development according to claim 7. Due to the construction according to claim 8 a rotationally fixed connection of the spring is achieved in a simple manner. The embodiment of claim 9 enables a cost-effective production of the support member and the holding member.
Zeichnung drawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen: Figur 1 eine Pumpe in einem Längsschnitt, An embodiment of the invention is illustrated in the drawing and explained in more detail in the following description. Show it: 1 shows a pump in a longitudinal section,
Figur 2 einen in Figur 1 mit I I bezeichneten Ausschnitt der Pumpe in vergrößerter Darstellung, FIG. 2 shows a section of the pump, designated by I I in FIG. 1, in an enlarged view,
Figur 3 die Pumpe ausschnittsweise in einem Querschnitt entlang Linie Figure 3 shows the pump fragmentary in a cross section along line
I I I-I I I in Figur 2,  I I-I I I in Figure 2,
Figur 4 die Pumpe ausschnittsweise in einer Ansicht in Pfeilrichtung IV in Figure 4 shows the pump fragmentary in a view in the direction of arrow IV in
Figur 2,  FIG. 2,
Figur 5 die Pumpe ausschnittsweise in einem Schnitt entlang Linie V-V in Figure 5 shows the pump fragmentary in a section along line V-V in
Figur 2 und  Figure 2 and
Figur 6 die Pumpe ausschnittsweise in einer Ansicht in Pfeilrichtung VI in Figure 6 shows the pump fragmentary in a view in the direction of arrow VI in
Figur 1.  FIG. 1
Beschreibung des Ausführungsbeispiels Description of the embodiment
In den Figuren 1 bis 6 ist eine Pumpe dargestellt, die insbesondere eine Kraft- stoffhochdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine ist. Die Pumpe weist ein Gehäuse 10 auf, das mehrteilig ausgebildet sein kann und in dem eine rotierend angetriebene Antriebswelle 14 um eine Drehachse 15 drehbar gelagert ist. Die Antriebswelle 14 weist wenigstens einen Nocken 16 auf, der auch ein Mehrfachnocken sein kann. Die Pumpe weist wenigstens ein oder mehrere Pumpenelemente 18 mit jeweils einem Pumpenkolben 20 auf, der durch den Nocken 16 der Antriebswelle 14 zumindest mittelbar in einer Hubbewegung in zumindest annähernd radialer Richtung zur Drehachse 15 der Antriebswelle 14 und in Richtung der Längsachse 21 des Pumpenkolbens 20 angetrieben wird. Es kann auch vorgesehen sein, dass die Pumpe keine eigene Antriebswelle 14 aufweist und der Pumpenkolben 20 des Pumpenelements 18 durch eine Welle der Brennkraftmaschine angetrieben wird, die einen Nocken 16 oder Exzenter aufweist. Der Pumpenkolben 20 ist in einer Zylinderbohrung 22 eines Gehäuseteils 24 der Pumpe dicht geführt. Das Gehäuseteil 24 weist einen flanschartigen Bereich 25 und einen von diesem zur Antriebswelle 14 hin abstehenden zylindrischen Ansatz 26 auf, in dem die Zylinderbohrung 22 verläuft. Mit seinem der Antriebswelle 14 abgewandten Ende begrenzt der Pumpenkolben 20 in der Zylinderbohrung 22 einen Pumpenarbeitsraum 28. Der Pumpenarbeitsraum 28 weist über ein in diesen hinein öffnendes Einlassrückschlagventil 30 eine Verbindung mit einem beispielsweise von einer Förderpumpe herführenden Zulauf 32 auf, über den der Pumpenarbeitsraum 28 beim radial nach innen zur Drehachse 15 der Antriebs- welle 14 gerichteten Saughub des Pumpenkolbens 20 mit Kraftstoff befüllt wird.FIGS. 1 to 6 show a pump which is in particular a high-pressure fuel pump for a fuel injection device of an internal combustion engine. The pump has a housing 10, which may be designed in several parts and in which a rotationally driven drive shaft 14 is rotatably mounted about an axis of rotation 15. The drive shaft 14 has at least one cam 16, which may also be a multiple cam. The pump has at least one or more pump elements 18, each having a pump piston 20 which is at least indirectly driven by the cam 16 of the drive shaft 14 in a lifting movement in at least approximately radial direction to the axis of rotation 15 of the drive shaft 14 and in the direction of the longitudinal axis 21 of the pump piston 20 becomes. It can also be provided that the pump does not have its own drive shaft 14 and the pump piston 20 of the pump element 18 is driven by a shaft of the internal combustion engine having a cam 16 or eccentric. The pump piston 20 is tightly guided in a cylinder bore 22 of a housing part 24 of the pump. The housing part 24 has a flange-like region 25 and a cylindrical projection 26 protruding therefrom towards the drive shaft 14, in which the cylinder bore 22 extends. With its end facing away from the drive shaft 14, the pump piston 20 in the cylinder bore 22 defines a pump working space 28. The pump working space 28 has an inlet check valve 30 opening into this connection with an inlet 32 leading, for example, from a feed pump, via which the pump working space 28 radially inward to the axis of rotation 15 of the drive shaft 14 directed suction stroke of the pump piston 20 is filled with fuel.
Der Pumpenarbeitsraum 28 weist außerdem über ein aus diesem heraus öffnendes Auslassrückschlagventil 34 eine Verbindung mit einem Ablauf 36 auf, der beispielsweise zu einem Kraftstoffhochdruckspeicher 38 führt und über den beim radial nach außen von der Drehachse 15 der Antriebswelle 14 weg gerichteten Förderhub des Pumpenkolbens 20 Kraftstoff aus dem Pumpenarbeitsraum 28 verdrängt wird. The pump working chamber 28 also has an outlet check valve 34 which opens out of this connection with a drain 36, which for example leads to a high-pressure fuel accumulator 38 and fuel via the delivery stroke of the pump piston 20 directed radially outward from the rotation axis 15 of the drive shaft 14 the pump working space 28 is displaced.
Der Pumpenkolben 20 stützt sich mittelbar über ein Stützelement in Form eines Rollenschuhs 42 am Nocken 16 der Antriebswelle 14 ab. Der Rollenschuh 42 weist auf seiner der Antriebswelle 14 zugewandten Seite eine konkav gekrümmteThe pump piston 20 is supported indirectly via a support element in the form of a roller shoe 42 on the cam 16 of the drive shaft 14. The roller shoe 42 has on its side facing the drive shaft 14 a concave curved
Vertiefung 44 auf, in der eine zumindest annähernd kreiszylinderförmige Rolle 46 drehbar gelagert ist, wobei die Drehachse der Rolle 46 mit 48 bezeichnet ist. Die Rolle 46 läuft auf dem Nocken 16 der Antriebswelle 14 ab. Das Gehäuse 10 der Kraftstoffhochdruckpumpe ist mit Kraftstoff gefüllt und durch den Kraftstoff erfolgt eine Schmierung zwischen der Rolle 46 und der Vertiefung 44 des RollenschuhsRecess 44, in which an at least approximately circular cylindrical roller 46 is rotatably mounted, wherein the axis of rotation of the roller 46 is denoted by 48. The roller 46 extends on the cam 16 of the drive shaft 14 from. The housing 10 of the high-pressure fuel pump is filled with fuel and the fuel is lubricated between the roller 46 and the recess 44 of the roller shoe
42. Der Rollenschuh 42 und der mit diesem verbundene Pumpenkolben 20 werden durch eine vorgespannte Feder in Form einer zylindrischen Schraubendruckfeder 50 zur Antriebswelle 14 hin beaufschlagt, so dass die Rolle 46 in Anlage am Nocken 16 gehalten wird. 42. The roller shoe 42 and the associated pump piston 20 are acted upon by a prestressed spring in the form of a cylindrical helical compression spring 50 to the drive shaft 14, so that the roller 46 is held in contact with the cam 16.
Die Schraubendruckfeder 50 umgibt den Ansatz 26 des Gehäuseteils 24 und deren Längsachse ist zumindest annähernd identisch mit der Längsachse 21 des Pumpenkolbens 20. Vom flanschartigen Bereich 25 des Gehäuseteils 24 steht nach innen, den Ansatz 26 koaxial umgebend ein Kragen 52 hervor. Der Kragen 52 weist wie in Figur 6 dargestellt in seinem Umfang eine in Richtung der Längs- achse 21 des Pumpenkolbens 20 verlaufende Nut 54 auf. Das Ende der Feder 50 ragt in den zwischen dem Ansatz 26 und dem Kragen 52 gebildeten Ringraum hinein und der Endbereich 56 der letzten Windung der Feder 50 ist radial zur Längsachse 21 nach außen gebogen und ragt in die Nut 54 hinein. Die Feder 50 ist somit über den Endbereich 56 ihrer letzten Windung um die Längsachse 21 unverdrehbar mit dem Gehäuseteil 24 verbunden. The helical compression spring 50 surrounds the projection 26 of the housing part 24 and the longitudinal axis is at least approximately identical to the longitudinal axis 21 of the pump piston 20. From the flange portion 25 of the housing part 24 is inwardly, the neck 26 coaxially surrounding a collar 52 protruding. The collar 52 has, as shown in FIG. axis 21 of the pump piston 20 extending groove 54. The end of the spring 50 protrudes into the annulus formed between the boss 26 and the collar 52 and the end portion 56 of the last turn of the spring 50 is bent radially outward from the longitudinal axis 21 and projects into the groove 54. The spring 50 is thus non-rotatably connected to the housing part 24 via the end region 56 of its last turn about the longitudinal axis 21.
Der Rollenschuh 42 ist etwa zylinderförmig ausgebildet mit rundem Querschnitt, wobei auf dessen der Antriebswelle 14 zugewandter Seite die Vertiefung 44 vor- gesehen ist. Auf der der Antriebswelle 14 abgewandten Seite des RollenschuhsThe roller shoe 42 is approximately cylindrical in shape with a round cross-section, the recess 44 being provided on its side facing the drive shaft 14. On the side facing away from the drive shaft 14 of the roller shoe
42 ist eine Öffnung in Form einer Bohrung 58 vorgesehen in die der aus der Zylinderbohrung 22 herausragende Endbereich des Pumpenkolbens 20 hineinragt. Der Pumpenkolben 20 ist mit dem Rollenschuh 42 fest verbunden, insbesondere indem der Endbereich des Pumpenkolbens 20 in die Bohrung 58 des Rollen- schuhs 42 eingepresst ist. Auf der der Antriebswelle 14 abgewandten Seite des42 is an opening in the form of a bore 58 is provided in which protrudes from the cylinder bore 22 protruding end portion of the pump piston 20. The pump piston 20 is firmly connected to the roller shoe 42, in particular by the end region of the pump piston 20 being pressed into the bore 58 of the roller shoe 42. On the side facing away from the drive shaft 14 of the
Rollenschuhs 42 ist ein im Durchmesser gegenüber dem Rollenschuh 42 reduzierter Bund 60 ausgebildet, der in das der Antriebswelle 14 zugewandte Ende der Feder 50 hineinragt. Am Umfang des Bunds 60 ist wie in den Figuren 2 und 4 dargestellt eine in Richtung der Längsachse 21 verlaufende Nut 62 ausgebildet und der Endbereich 64 der letzten Windung der Feder 50 ist radial zur Längsachse 21 nach innen gebogen und ragt in die Nut 62 hinein. Die Feder 50 ist somit über den Endbereich 64 ihrer letzten Windung um die Längsachse 21 unverdrehbar mit dem Rollenschuh 42 verbunden. Die Vertiefung 44 im Rollenschuh 42 ist beispielsweise so ausgebildet, dass diese wie in Figur 3 dargestellt die Rolle 46 auf deren Umfang über einen Winkel α von maximal 180° umgibt. Vorzugsweise umgibt die Vertiefung 44 die Rolle 46 über weniger als 180°, insbesondere über etwa 140°. Um die Rolle 46 im Rollenschuh 42 zu halten ist ein Halteelement 66 vorgesehen, das auf der der An- triebswelle 14 zugewandten Seite des Rollenschuhs 42 angeordnet ist und amRoller shoe 42 is a reduced in diameter relative to the roller shoe 42 collar 60 which projects into the drive shaft 14 facing the end of the spring 50. As shown in FIGS. 2 and 4, a groove 62 extending in the direction of the longitudinal axis 21 is formed on the circumference of the collar 60, and the end region 64 of the last turn of the spring 50 is bent inwards radially to the longitudinal axis 21 and protrudes into the groove 62. The spring 50 is thus non-rotatably connected to the roller shoe 42 about the end portion 64 of its last turn about the longitudinal axis 21. The recess 44 in the roller shoe 42 is for example formed so that it as shown in Figure 3, the roller 46 on the circumference of an angle α of at most 180 ° surrounds. Preferably, the recess 44 surrounds the roller 46 for less than 180 °, in particular about 140 °. In order to hold the roller 46 in the roller shoe 42, a holding element 66 is provided, which is arranged on the drive shaft 14 facing side of the roller shoe 42 and on
Rollenschuh 42 befestigt ist. Der Rollenschuh 42 weist auf seiner der Antriebswelle 14 zugewandten Seite eine im Querschnitt beispielsweise kreisförmige Ausnehmung 68 auf. Das Halteelement 66 ist scheibenförmig mit der Ausnehmung 68 entsprechendem Querschnitt ausgebildet und in die Ausnehmung 68 eingefügt, insbesondere in die Ausnehmung 68 eingepresst. Das Halteelement 66 weist wie in den Figuren 3 und 5 dargestellt eine schlitzförmige Öffnung 70 auf, durch die die Rolle 46 zur Antriebswelle 14 hin hindurchragt, wobei die Breite des Schlitzes 70 in radialer Richtung bezüglich der Drehachse 48 der Rolle 46 kleiner ist als der Durchmesser der Rolle 46, so dass die Rolle 46 nicht durch den Schlitz 70 hindurchtreten kann. Das Halteelement 66 kommt in seiner fertig montierten Endposition am Boden 69 der Ausnehmung 68 des Rollenschuhs 42 zur Anlage ohne dass das Halteelement 66 gegen die Rolle 46 drückt. Die seitlichen Ränder 71 des Schlitzes 70 können wie in Figur 3 dargestellt angeschrägt sein, wobei sich die Breite des Schlitzes 70 zur Rolle 46 hin vergrößert. Durch die Anschrägung der Ränder 71 des Schlitzes 70 werden scharfe Kanten beim Anlauf der Rolle 46 vermieden. Alternativ können die seitlichen Ränder 71 des Schlitzes 70 auch gerundet ausgebildet sein. Roller shoe 42 is attached. The roller shoe 42 has, on its side facing the drive shaft 14, a recess 68 which is circular in cross-section, for example. The holding element 66 is disc-shaped with the recess 68 corresponding cross-section and inserted into the recess 68, in particular pressed into the recess 68. The holding element 66 has, as shown in Figures 3 and 5, a slot-shaped opening 70, through which the roller 46 projects toward the drive shaft 14, wherein the width of the slot 70 in the radial direction with respect to the axis of rotation 48 of the roller 46 is smaller than the diameter the roller 46, so that the roller 46 can not pass through the slot 70. The holding member 66 comes in its final assembled end position at the bottom 69 of the recess 68 of the roller shoe 42 for conditioning without the holding member 66 presses against the roller 46. The lateral edges 71 of the slot 70 may be bevelled as shown in Figure 3, wherein the width of the slot 70 increases toward the roller 46 out. The bevel of the edges 71 of the slot 70 sharp edges are avoided during start-up of the roller 46. Alternatively, the lateral edges 71 of the slot 70 may also be rounded.
Die Länge des Schlitzes 70 in Richtung der Drehachse 48 der Rolle 46 ist nur wenig größer als die Länge der Rolle 46. Das Halteelement 66 hält die Rolle 46 in der Vertiefung 44 des Rollenschuhs 42 und bildet eine Abstützung für die Rolle 46, an der die Rolle 46 in Richtung ihrer Drehachse 48 zur Anlage kommen kann. Das Halteelement 66 ist vorzugsweise aus einem Material mit hoher Verschleißfestigkeit hergestellt, beispielsweise Hartmetall oder Keramik. Die in Richtung ihrer Drehachse 48 weisenden axialen Enden 47 der Rolle 46, mit denen diese am Halteelement 66 anlaufen kann, können konvex gerundet ausgebildet sein. The length of the slot 70 in the direction of the axis of rotation 48 of the roller 46 is only slightly larger than the length of the roller 46. The holding member 66 holds the roller 46 in the recess 44 of the roller shoe 42 and forms a support for the roller 46, on which Roller 46 can come to rest in the direction of its axis of rotation 48. The holding element 66 is preferably made of a material with high wear resistance, for example hard metal or ceramic. The pointing in the direction of its axis of rotation 48 axial ends 47 of the roller 46, with which they can start on the support member 66 may be formed convex rounded.
Das Stützelement 42 ist nur über den Pumpenkolben 20 in Richtung der Hubbewegung des Pumpenkolbens 20 geführt und weist keine Führung in einem Gehäuseteil auf. Zwischen dem Stützelement 42 und dem dieses umgebenden Gehäuseteil ist dabei ein ausreichend großer Abstand vorhanden, so dass Kraftstoff zwischen der der Antriebswelle 14 zugewandten Unterseite und der der Antriebswelle 14 abgewandten Oberseite des Stützelements 42 strömen kann. Das Stützelement 42 und das Halteelement 66 brauchen daher keine durchgehenden Öffnungen aufzuweisen, die eine Durchströmung des Stützelements 42 und des Halteelements 66 zwischen deren Unter- und Oberseite ermöglichen. Falls erforderlich können zur Ermöglichung einer Durchströmung das Stützelement 42 und das Halteelement 66 dennoch mit Öffnungen 74 versehen sein. The support member 42 is guided only via the pump piston 20 in the direction of the lifting movement of the pump piston 20 and has no guide in a housing part. A sufficiently large distance is present between the support element 42 and the surrounding housing part, so that fuel can flow between the underside of the drive shaft 14 and the top side of the support element 42 facing away from the drive shaft 14. The support member 42 and the support member 66 need therefore have no through openings, which allow a flow through the support member 42 and the support member 66 between the bottom and top. If necessary, the support member 42 and the retainer 66 may still be provided with apertures 74 to facilitate flow therethrough.

Claims

Ansprüche claims
1. Pumpe, insbesondere Kraftstoffhochdruckpumpe, mit wenigstens einem Pumpenelement (18), das einen in einer Zylinderbohrung (22) eines Gehäuseteils (24) geführten Pumpenkolben (20) aufweist, der durch eine Antriebswelle (14) mittelbar in einer Hubbewegung angetrieben wird, wobei sich der Pumpenkolben (20) über ein Stützelement (42) und eine im Stützelement (42) drehbar gelagerte Rolle (46) an der Antriebswelle (14) abstützt, wobei das Stützelement (42) zumindest mittelbar in Richtung der Hubbewegung des Pumpenkolbens (20) geführt ist, wobei das Stützelement (42) und der Pumpenkolben (20) durch eine Feder (50) zur Antriebswelle (14) hin beaufschlagt sind, wobei die Feder (50) an ihrem der Antriebswelle (14) zugewandten Ende um ihre Längsachse (21) unverdrehbar mit dem Stützelement (42) verbunden ist und an ihrem der Antriebswelle (14) abgewandten Ende um ihre Längsachse (21) unverdrehbar mit einem Gehäuseteil (24) verbunden ist, dadurch gekenn- zeichnet, dass der Pumpenkolben (20) fest mit dem Stützelement (42) verbunden ist und dass das Stützelement (42) nur über den Pumpenkolben (20) in Richtung der Hubbewegung des Pumpenkolbens (20) geführt ist. 1. Pump, in particular high-pressure fuel pump, with at least one pump element (18) having a in a cylinder bore (22) of a housing part (24) guided pump piston (20) which is driven by a drive shaft (14) indirectly in a lifting movement, wherein the pump piston (20) is supported on the drive shaft (14) via a support element (42) and a roller (46) rotatably mounted in the support element (42), the support element (42) being at least indirectly in the direction of the stroke movement of the pump piston (20). is guided, wherein the support element (42) and the pump piston (20) by a spring (50) to the drive shaft (14) are acted upon, the spring (50) at its the drive shaft (14) facing the end about its longitudinal axis (21 ) is non-rotatably connected to the support element (42) and at its the drive shaft (14) facing away from its longitudinal axis (21) is non-rotatably connected to a housing part (24), characterized in that the Pumpenkol ben (20) is fixedly connected to the support element (42) and that the support element (42) only over the pump piston (20) in the direction of the lifting movement of the pump piston (20) is guided.
2. Pumpe nach Anspruch 1, dadurch gekennzeichnet, dass das Stützelement (42) auf seiner der Antriebswelle (14) abgewandten Seite eine Öffnung (58) aufweist, in der das aus der Zylinderbohrung (22) ragende Ende des Pumpenkolbens (20) gehalten, insbesondere eingepresst ist. 2. Pump according to claim 1, characterized in that the support element (42) on its side facing away from the drive shaft (14) has an opening (58) in which from the cylinder bore (22) projecting end of the pump piston (20) held, in particular is pressed.
3. Pumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Stütz- element (42) auf seiner der Antriebswelle (14) zugewandten Seite eine konkave Vertiefung (44) aufweist, in der die Rolle (46) drehbar gelagert ist, und dass auf der der Antriebswelle (14) zugewandten Seite des Stützelements (42) ein Halteelement (66) für die Rolle (46) befestigt ist, durch das die Rolle (46) im Stützelement (42) gehalten wird. Pumpe nach Anspruch 3, dadurch gekennzeichnet, dass die Vertiefung (44) die Rolle (46) auf deren Umfang über einen Winkel (a) von höchstens 180°, vorzugsweise weniger als 180° umschließt. 3. Pump according to claim 1 or 2, characterized in that the support element (42) on its the drive shaft (14) facing side has a concave recess (44) in which the roller (46) is rotatably mounted, and that on the drive shaft (14) facing side of the support member (42) has a holding element (66) for the roller (46) is fixed, by which the roller (46) is held in the support element (42). A pump according to claim 3, characterized in that the recess (44) surrounds the roller (46) on its circumference over an angle (a) of at most 180 °, preferably less than 180 °.
Pumpe nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass das Stützelement (42) auf seiner der Antriebswelle (14) zugewandten Seite eine die Vertiefung (44) umgebende Ausnehmung (68) aufweist, in der das Halteelement (66) befestigt, insbesondere eingepresst ist. Pump according to claim 3 or 4, characterized in that the support element (42) on its the drive shaft (14) side facing a recess (44) surrounding the recess (68) in which the holding element (66) attached, in particular is pressed ,
Pumpe nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass das Halteelement (66) eine Abstützung für die Rolle (46) in Richtung von deren Drehachse (48) bildet. Pump according to one of claims 3 to 5, characterized in that the holding element (66) forms a support for the roller (46) in the direction of its axis of rotation (48).
Pumpe nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, dass das Halteelement (66) aus einem Material mit hoher Verschleißfestigkeit hergestellt ist, insbesondere aus Hartmetall. Pump according to one of claims 3 to 6, characterized in that the holding element (66) is made of a material having high wear resistance, in particular of hard metal.
Pumpe nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Feder (50) eine Schraubendruckfeder ist deren Windungsenden (56,64) in radialer Richtung bezüglich der Längsachse (21) der Feder (50) verlaufen und die in entsprechende Aufnahmen (54,62) des Gehäuseteils (24) und des Stützelements (42) eingreifen. Pump according to one of the preceding claims, characterized in that the spring (50) is a helical compression spring whose winding ends (56,64) extend in the radial direction with respect to the longitudinal axis (21) of the spring (50) and in corresponding receptacles (54,62 ) of the housing part (24) and the support element (42) engage.
Pumpe nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Stützelement (42) und das Halteelement (66) frei sind von durchgehenden Öffnungen zwischen deren der Antriebswelle (14) zugewandten Seiten und deren der Antriebswelle (14) abgewandten Seiten. Pump according to one of the preceding claims, characterized in that the support element (42) and the holding element (66) are free of through openings between the drive shaft (14) facing sides and their drive shaft (14) facing away from sides.
PCT/EP2011/068097 2010-11-05 2011-10-17 Pump, in particular high-pressure fuel pump WO2012059315A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201180052756.5A CN103201499B (en) 2010-11-05 2011-10-17 Pump
EP11770768.7A EP2635797B1 (en) 2010-11-05 2011-10-17 Pump, in particular high-pressure fuel pump

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010043512.0 2010-11-05
DE201010043512 DE102010043512A1 (en) 2010-11-05 2010-11-05 Pump, in particular high-pressure fuel pump

Publications (1)

Publication Number Publication Date
WO2012059315A1 true WO2012059315A1 (en) 2012-05-10

Family

ID=44925499

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/068097 WO2012059315A1 (en) 2010-11-05 2011-10-17 Pump, in particular high-pressure fuel pump

Country Status (4)

Country Link
EP (1) EP2635797B1 (en)
CN (1) CN103201499B (en)
DE (1) DE102010043512A1 (en)
WO (1) WO2012059315A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2915994A1 (en) * 2014-03-06 2015-09-09 Continental Automotive GmbH Tappet arrangement and pump

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2064700A (en) * 1979-09-13 1981-06-17 Leco Hydraulics Ltd Ball piston
WO1998014722A1 (en) * 1996-10-02 1998-04-09 Jurij Manfreda A piston assembly of a hydraulic radial piston-type machine
WO2005088125A1 (en) * 2004-03-09 2005-09-22 Robert Bosch Gmbh High pressure pump, particularly for a fuel injection device of an internal combustion engine
WO2009098095A1 (en) * 2008-02-04 2009-08-13 Robert Bosch Gmbh Cam free of transverse force for common-rail high-pressure pumps
DE102008000699A1 (en) 2008-03-17 2009-09-24 Robert Bosch Gmbh Fuel high-pressure pump for fuel injection system of internal-combustion engine, has pump housing and pump element, which has piston, where piston is driven by cam, where cam is operated with roller

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2440949Y (en) * 2000-09-08 2001-08-01 无锡威孚集团有限公司 Oil jetting pump
CN2663678Y (en) * 2003-07-28 2004-12-15 上海东维燃油喷射有限公司 High power type oil spout pump assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2064700A (en) * 1979-09-13 1981-06-17 Leco Hydraulics Ltd Ball piston
WO1998014722A1 (en) * 1996-10-02 1998-04-09 Jurij Manfreda A piston assembly of a hydraulic radial piston-type machine
WO2005088125A1 (en) * 2004-03-09 2005-09-22 Robert Bosch Gmbh High pressure pump, particularly for a fuel injection device of an internal combustion engine
WO2009098095A1 (en) * 2008-02-04 2009-08-13 Robert Bosch Gmbh Cam free of transverse force for common-rail high-pressure pumps
DE102008000699A1 (en) 2008-03-17 2009-09-24 Robert Bosch Gmbh Fuel high-pressure pump for fuel injection system of internal-combustion engine, has pump housing and pump element, which has piston, where piston is driven by cam, where cam is operated with roller

Also Published As

Publication number Publication date
EP2635797A1 (en) 2013-09-11
DE102010043512A1 (en) 2012-05-10
CN103201499B (en) 2016-10-05
CN103201499A (en) 2013-07-10
EP2635797B1 (en) 2015-10-07

Similar Documents

Publication Publication Date Title
EP2585707B1 (en) Pump, in particular a high-pressure fuel pump
WO2008037524A1 (en) Tappet assembly for a high-pressure pump and high-pressure pump comprising at least one tappet assembly
WO2005111405A1 (en) High-pressure pump for a fuel injection device pertaining to an internal combustion engine
EP2798191B1 (en) Fuel overflow valve for a fuel injection device, and fuel injection device comprising fuel overflow valve
EP2235368B1 (en) Pump, particularly high-pressure fuel pump
EP2271838B1 (en) Pump, particularly a high-pressure fuel pump
WO2005031151A1 (en) Tappet for a high-pressure pump and high-pressure pump comprising at least one tappet
EP2188525B1 (en) Pump, particularly high-pressure fuel pump
WO2005031150A1 (en) Tappet assembly for a high-pressure pump and high-pressure pump comprising at least one tappet assembly
DE102004011284A1 (en) High-pressure pump, in particular for a fuel injection device of an internal combustion engine
DE102008017824A1 (en) Tappet assembly for high-pressure pump of internal-combustion engine in motor vehicle, has retaining ring and formed such that movement of roller is controlled in roller shoe in direction of roller longitudinal axis
EP2635797B1 (en) Pump, in particular high-pressure fuel pump
EP2625418B1 (en) Bearing element having a roller rotatably mounted therein, in particular in the drive of a pump piston of a high-pressure fuel pump
DE102010041178A1 (en) Pump i.e. high-pressure fuel pump, for fuel injector of internal combustion engine, has roller comprising central portion and edge areas in direction of axis of shaft, where portion and areas are longitudinally formed away from track
EP2134966B1 (en) Pump, in particular high-pressure fuel pump
DE102008008438A1 (en) High-pressure pump has tappet, which serves for indirect support of piston with longitudinal axis at drive shaft over roller, which is pivotally coupled with tappet
EP3014107A1 (en) Pumping device, in particular high pressure fuel pumping device for a fuel injection device
WO2005052356A1 (en) Fuel-injection device for an internal combustion engine
DE10313745A1 (en) High pressure pump for IC engine fuel injection device e.g. for automobile, with hydrodynamic lubrication of bearings for ring segments operating pistons of pump elements
WO2005090784A1 (en) High-pressure pump, in particular for a fuel-injection device of an internal combustion engine
DE10355028A1 (en) High pressure pump especially for vehicle has the piston rod and cam follower made in one piece and spring loaded to press onto the drive cam
DE102012221765A1 (en) Pump, particularly high-pressure fuel pump for fuel injection system, has support element with opening between recess and side on which pump piston is supported, where opening extends approximately along recess
DE102008017823B4 (en) High-pressure pump with a pump piston, a plunger and a roller shoe consisting of at least two plate-shaped roller shoe segments
WO2016142072A1 (en) High-pressure fuel pump, in particular for a fuel injection device of an internal combustion engine
DE102016210842A1 (en) piston pump

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11770768

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2011770768

Country of ref document: EP