EP2449261A1 - Pompe haute pression - Google Patents

Pompe haute pression

Info

Publication number
EP2449261A1
EP2449261A1 EP10718148A EP10718148A EP2449261A1 EP 2449261 A1 EP2449261 A1 EP 2449261A1 EP 10718148 A EP10718148 A EP 10718148A EP 10718148 A EP10718148 A EP 10718148A EP 2449261 A1 EP2449261 A1 EP 2449261A1
Authority
EP
European Patent Office
Prior art keywords
pump
pressure pump
eccentric
piston
tappet
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Withdrawn
Application number
EP10718148A
Other languages
German (de)
English (en)
Inventor
Friedrich Boecking
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
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
Publication of EP2449261A1 publication Critical patent/EP2449261A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F04B1/0408—Pistons
    • 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
    • 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
    • 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
    • F04B1/0435—Arrangements for disconnecting the pistons from the actuated cam
    • 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
    • F04B1/0448—Sealing means, e.g. for shafts or housings
    • 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
    • F04B1/053—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/042—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/045—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being eccentrics

Definitions

  • the present invention relates to a high-pressure pump for a fuel injection device of an internal combustion engine according to the preamble of claim 1.
  • radial piston pumps are used to build up the high pressure in a high-pressure accumulator of the common rail system for common rail systems.
  • the radial piston pumps may have one or more pump elements with respective pump pistons, which are indirectly displaced by a drive shaft, for example via a cam or an eccentric to perform a suction stroke, during which fuel is sucked into a pump working space of the high-pressure pump, and a pressure stroke, in which the sucked fuel is compressed and is output to the high-pressure accumulator of the common rail system.
  • a radial piston pump is known in which the fuel delivery via a radial piston which is actuated by an eccentric shaft, takes place.
  • Three radial pistons are evenly distributed on the outer circumference of the eccentric shaft.
  • Each of the radial pistons rests on the eccentric shaft via a sliding block and an eccentric ring.
  • the eccentric ring is rotatably mounted on the eccentric shaft via a sliding bearing.
  • DE 198 26 961 A1 describes a radial piston pump in which an eccentric shaft for driving a delivery unit is provided on one side in the pump housing. is superimposed and arranged on the freely projecting end portion of the shaft designed as a mechanical seal shaft seal.
  • the slip ring is located on an eccentric of the eccentric shaft, which is pressed by a pressure device and the form of the conveyor against the sliding ring.
  • the eccentric ring is cap-shaped and surrounds the freely projecting end portion of the eccentric shaft.
  • a high-pressure pump for a fuel injection device of an internal combustion engine which has a pump element with a pump piston which can be moved up and down in accordance with an eccentric stroke by an eccentric provided on a rotatably mounted drive shaft and an eccentric ring surrounding the eccentric a bucket tappet is arranged.
  • the concept of a high-pressure pump according to the invention is designed as a single-piston pump
  • the solution according to the invention offers a combination of a simple construction with simultaneous high-speed stability. By inserting the pump piston into the cup tappet, it can transmit the lateral forces acting on it particularly well. Also, the high pressure is only in the cylinder head and the housing of the high pressure pump carries only the mechanics and the low pressure circuit.
  • the bucket tappet is a single cup tappet.
  • the single-cup tappet provides a further improved transmission of the ben acting transverse forces and is particularly suitable for high speeds for transmitting the shear forces on the housing of the pump.
  • the high pressure pump is a single piston pump.
  • the eccentric is designed as a sinusoidal cam. It is also preferable if between the eccentric and the eccentric ring
  • the bearing is designed as a PEEK bearing.
  • PEEK bearing high speeds are possible.
  • the high speed resistance of the high pressure pump allows a high gear ratio and thus a smaller piston diameter, which in turn leads to improved efficiency.
  • the tappet is inserted into a ne formed in a housing of the high-pressure pump recess.
  • the bucket tappet on an outer wall, which rests against a wall of the housing.
  • the bucket tappet has an inner wall, which faces a shank portion of a cylinder head, in which the pump piston is arranged.
  • a spring is arranged between the inner wall of the tappet and the shaft portion.
  • Fig. 1 is a partial sectional view through a high-pressure pump according to the prior art
  • FIG. 2 shows a section through a high pressure pump according to one embodiment.
  • a high pressure pump 1 for a fuel injector is a
  • the high pressure pump 1 comprises a housing 2, which is formed in several parts, and in which a rotationally driven drive shaft 3 is arranged, on which a cam 4 is provided.
  • the high-pressure pump 1 has a pump element 6 arranged in a cylinder head 5 with a pump piston 7, which is indirectly driven by the cam 4 of the drive shaft 3 in a lifting movement in at least approximately radial direction to the rotation axis D of the drive shaft 3.
  • the pump piston 7 is guided in a cylinder bore 8 in the cylinder head 5 tightly displaceable and limited with its drive shaft 3 facing away from end face in the cylinder bore 8 a pump working chamber 9.
  • the cylinder head 5 is provided with a shaft portion 10 in which the cylinder bore 8 receiving the pump piston 7 is provided, and around which the spring 11 is disposed.
  • the pump working chamber 9 has a connection (not shown) in the housing 2 via a fuel inlet channel to a connection with a fuel feed, for example, a feed pump.
  • a fuel feed for example, a feed pump.
  • the pump working chamber 9 also has a connection extending in the cylinder head 5 fuel drain passage 14 with an outlet, which at- For example, with a high-pressure accumulator (not shown) of a common rail system is connected.
  • a high-pressure accumulator (not shown) of a common rail system is connected.
  • injectors (not shown) arranged on the cylinders of the internal combustion engine are connected to the high-pressure accumulator, through which fuel is injected into the cylinders of the internal combustion engine.
  • an outlet valve 15 opening out of the pump working space 9 is arranged.
  • the pump element 6 is associated with a plunger assembly with a hollow cylindrical roller tappet 16, a roller shoe 17 and a roller 18, via which the pump piston 7 is supported on the cam 4 of the drive shaft 3.
  • the plunger assembly and the pump piston 7 are pressed by the prestressed spring 1 1 to the cam 4 of the drive shaft 3 out.
  • the spring 1 1 is designed as the pump piston 7 surrounding helical compression spring.
  • the spring 1 1 is supported on the one hand on a housing wall of the cylinder head 5 and on the other hand on a spring plate 20 from.
  • the spring plate 20 is connected to the pump piston 7, so that the spring 1 1 acts both on the pump piston 7 and on the roller tappet 16 in order to press it against the cam 4 of the drive shaft 3.
  • the described high-pressure pump 1 according to the prior art does not produce high pressure within the housing 2, so that no high-pressure or strength-increasing measures for the housing 2 are required. Furthermore, it can be seen in FIG. 1 that the high-pressure pump 1 has a metering unit 23, and that a mounting flange 24 is provided on the housing 2.
  • FIG. 2 shows a sectional view through a high-pressure pump 1 according to an embodiment.
  • the components of the high pressure pump 1 are also arranged substantially in a multi-part housing 2 and the cylinder head 5.
  • an eccentric 21 is arranged, which is designed here as a sinusoidal cam.
  • a PEEK bearing 30 is provided between the eccentric ring 22 and the eccentric 21, to allow the high speeds.
  • a pump element 6 with a pump piston 7, which ends at one end in the pump working chamber 9 and is provided at the opposite end with a piston foot 20, respectively.
  • the pump piston 7 is arranged in a bucket tappet 26, which is designed as a single-cup tappet, which transmits the transverse forces to the housing 2, especially at high rotational speeds. The lateral forces are additionally reduced by a flow indicated by the reference numeral 29.
  • the tappet 26 is inserted into a recess 31 formed in the housing 2 of the high-pressure pump 1.
  • the tappet 26 has an outer wall 27, which on a
  • the cup tappet 26 has an inner wall 28, which is opposite to the shank portion 10 of the cylinder head 5, in which the pump piston 7 is arranged. Furthermore, in the embodiment between the inner wall 28 of the tappet 26 and the shaft portion 10, a spring 1 1 is arranged.
  • a schematically illustrated fuel overflow valve 25 is also provided in this embodiment.
  • the high pressure in the embodiment shown in Fig. 2 is applied only in the cylinder head 5, so that the housing 2 carries only the mechanics and the low-pressure circuit.
  • the high-pressure pump 1 according to the invention offers a particularly advantageous combination of a simple design with simultaneous high rotational speed, the high rotational speed in turn allows a high translation and thus a smaller piston diameter, which in turn leads to an improvement in the efficiency of the high-pressure pump 1.

Abstract

La présente invention concerne une pompe haute pression (1) pour système d'injection de carburant d'un moteur à combustion interne, qui comporte un élément de pompe (6) muni d'un piston (7). Le mouvement de montée et de descente du piston est produit par un excentrique (21) prévu sur un arbre d'entraînement (3) monté rotatif et par une bague d'excentrique (22) qui entoure l'excentrique (21, en fonction d'une course de l'excentrique, le piston (7) étant disposé dans un poussoir à coupelle (26).
EP10718148A 2009-06-29 2010-04-30 Pompe haute pression Withdrawn EP2449261A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910027272 DE102009027272A1 (de) 2009-06-29 2009-06-29 Hochdruckpumpe
PCT/EP2010/055887 WO2011000598A1 (fr) 2009-06-29 2010-04-30 Pompe haute pression

Publications (1)

Publication Number Publication Date
EP2449261A1 true EP2449261A1 (fr) 2012-05-09

Family

ID=42313866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10718148A Withdrawn EP2449261A1 (fr) 2009-06-29 2010-04-30 Pompe haute pression

Country Status (4)

Country Link
EP (1) EP2449261A1 (fr)
CN (1) CN102472257A (fr)
DE (1) DE102009027272A1 (fr)
WO (1) WO2011000598A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102425533A (zh) * 2011-09-23 2012-04-25 重庆工商大学 一种正弦流量发生装置
CN103047100A (zh) * 2013-01-10 2013-04-17 无锡开普机械有限公司 具有凸轮轴轴套的转子泵
CN103452789A (zh) * 2013-09-06 2013-12-18 中国第一汽车股份有限公司无锡油泵油嘴研究所 用于内燃机供油泵的凸轮机构
CN103470416B (zh) * 2013-09-26 2016-08-17 南岳电控（衡阳）工业技术股份有限公司 一种应用于高压共轨燃油喷射系统的径向柱塞供油泵
DE102022206919A1 (de) 2022-07-06 2024-01-11 Thyssenkrupp Ag Radialkolbenpumpe, insbesondere Radialkolbenverdichter

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4305791C2 (de) 1993-02-25 2001-12-13 Hydraulik Ring Gmbh Radialkolbenpumpe, insbesondere Kraftstoffpumpe für Verbrennungsmotoren
WO1998058172A1 (fr) 1997-06-17 1998-12-23 Mannesmann Rexroth Ag Pompe a pistons radiaux
WO2003014569A1 (fr) * 2001-08-08 2003-02-20 Crt Common Rail Technologies Ag Pompe d'alimentation haute pression
DE10256528A1 (de) * 2002-12-04 2004-06-24 Robert Bosch Gmbh Hochdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine
JP2006170184A (ja) * 2004-11-16 2006-06-29 Denso Corp 高圧燃料ポンプ
DE102004056940A1 (de) * 2004-11-25 2006-06-01 Schaeffler Kg Stößel für eine Hochdruckeinspritzpumpe
AT504520B1 (de) * 2007-03-26 2008-06-15 Bosch Gmbh Robert Vorrichtung zum antreiben einer kolbenpumpe
US8122811B2 (en) * 2007-11-12 2012-02-28 Denso Corporation Fuel injection pump and method for assembling the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011000598A1 *

Also Published As

Publication number Publication date
CN102472257A (zh) 2012-05-23
WO2011000598A1 (fr) 2011-01-06
DE102009027272A1 (de) 2010-12-30

Similar Documents

Publication Publication Date Title
EP2652326B1 (fr) Pompe à haute pression
EP1714030B1 (fr) Pompe haute pression, notamment pour systeme d'injection de carburant de moteur a combustion interne
DE102009000859A1 (de) Kraftstoffhochdruckpumpe
DE102009026596A1 (de) Hochdruckpumpe
WO2010055100A1 (fr) Unité pompe pour une pompe à haute pression
EP2464866A1 (fr) Pompe à haute pression
EP2449261A1 (fr) Pompe haute pression
DE10350018A1 (de) Anschlussplatte für eine Axialkolbenpumpe
EP2188525B1 (fr) Pompe, notamment pompe de carburant à haute pression
EP2699788B1 (fr) Pompe à carburant haute pression, dotée d'un palier de butée situé sur l'arbre à cames
DE19956092A1 (de) Kolbenpumpe, insbesondere Hochdruck-Radialkolbenpumpe
DE102011082642A1 (de) Pumpe, insbesondere Kraftstoffhochdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine
EP0881380A1 (fr) Pompe d'alimentation haute-pression
DE10138362A1 (de) Einstempel-Einspritzpumpe für ein Common-Rail-Kraftstoffeinspritzsystem
WO2011088958A1 (fr) Pompe à haute pression
WO2009098095A1 (fr) Came sans effort transversal pour pompes haute pression à rampe commune
EP2461032A2 (fr) Pompe à haute pression
WO2011003657A1 (fr) Pompe à carburant haute pression
DE102009003097B4 (de) Hochdruckpumpe, insbesondere Radialkolbenpumpe, mit zumindest einem Stößelkörper, einem verdrehbaren Rollenschuh, einer Laufrolle und einer axialen Anlagestelle für die Laufrolle, die beabstandet zur Drehachse der Laufrolle angeordnet ist
DE102015016314A1 (de) Kolbenpumpe
DE102015210798B4 (de) Kraftstoffhochdruckpumpe
DE102009026735A1 (de) Hochdruckpumpe
EP2526284A1 (fr) Pompe haute pression
DE102009026729A1 (de) Hochdruckpumpe
DE102010039967A1 (de) Hochdruckpumpe

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20120130

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20120828