WO2014206609A1 - Dispositif de pompage, notamment dispositif de pompage de carburant sous haute pression pour un système d'injection de carburant - Google Patents

Dispositif de pompage, notamment dispositif de pompage de carburant sous haute pression pour un système d'injection de carburant Download PDF

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Publication number
WO2014206609A1
WO2014206609A1 PCT/EP2014/058926 EP2014058926W WO2014206609A1 WO 2014206609 A1 WO2014206609 A1 WO 2014206609A1 EP 2014058926 W EP2014058926 W EP 2014058926W WO 2014206609 A1 WO2014206609 A1 WO 2014206609A1
Authority
WO
WIPO (PCT)
Prior art keywords
drive shaft
eccentric
cam
plunger
outer contour
Prior art date
Application number
PCT/EP2014/058926
Other languages
German (de)
English (en)
Inventor
Andreas Dutt
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 CN201480036607.3A priority Critical patent/CN105358819B/zh
Priority to EP14720621.3A priority patent/EP3014107B1/fr
Publication of WO2014206609A1 publication Critical patent/WO2014206609A1/fr

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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0001—Fuel-injection apparatus with specially arranged lubricating system, e.g. by fuel oil
    • 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
    • F02M59/04—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 special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
    • F02M59/06—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 special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps with cylinders arranged radially to driving shaft, e.g. in V or star arrangement
    • 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
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/18—Lubricating
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/02—Fuel-injection apparatus having means for reducing wear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/0265—Pumps feeding common rails

Definitions

  • the invention is based on a pumping device, in particular
  • a fuel high-pressure pumping device for a fuel injection device according to the preamble of claim 1.
  • Such a pumping device in the form of a high-pressure fuel pumping device is known from DE 102 56 528 AI.
  • This pumping device has at least one pump element, which via a plunger through a
  • Drive shaft is driven in a lifting movement.
  • the drive shaft in this case has a cam or eccentric on which the plunger is supported.
  • the drive shaft is rotatably mounted via at least one bearing, wherein the at least one bearing point is supplied lubricating medium.
  • Lubricating medium for example, lubricating oil is provided, which is supplied under pressure of at least one bearing point.
  • Lubricating oil is provided, which is supplied under pressure of at least one bearing point.
  • Lubrication is also required, which takes place in the known pumping device by due to the Drehbwegung the drive shaft fluidized or lubricating oil mist.
  • the pumping device according to the invention with the features according to claim 1 has the advantage that directed by the outer contour of the drive shaft from the bearing outlet lubricant is directed to the plunger and thus its lubrication and the lubrication of its support is ensured. For this purpose, no additional components are required.
  • the training according to claim 3 allows a directed outflow of the
  • the embodiment according to claim 7 ensures lubrication of the bearing of the roller in the plunger in a simple manner.
  • the embodiment according to claim 8 allows a directed introduction of lubricating medium between the roller and the plunger.
  • the embodiment according to claim 9 ensures lubrication of the bearing of the roller and of the bolt in the plunger in a simple manner.
  • Lubricating medium between the roller and the ram further improved.
  • FIG. 1 shows a detail of a pump device in a longitudinal section according to a first exemplary embodiment
  • FIG. 2 shows a partial view of the pump device according to a second exemplary embodiment
  • FIG. 3 shows the pump device in a cross-section along line III-III in FIG. Description of the embodiment
  • the pumping device has at least one
  • Pump element 10 which in turn has a pump piston 12 which is at least indirectly driven by a drive shaft 14 in a lifting movement.
  • the drive shaft 14 has one or more cams 16 or eccentric, via which the rotational movement of the drive shaft 14 in the
  • the pump piston 12 is supported via a plunger 18 on the cam 16 or eccentric of the drive shaft 14.
  • the pump element 10 has a housing 20 in which in a
  • Housing part 20 is referred to below as the cylinder head.
  • the pump piston 12 in the cylinder bore 22 defines a pump working space 24.
  • the pump working space 24 has an inlet valve 26, which is an inlet check valve opening into the pump working space 24, with an inlet 28 via which the Pump workspace 24 while radially inward to
  • the pump working chamber 24 also has an outlet valve 30 which, for example, opens out of the pump working chamber 24
  • Outlet check valve is, a connection to a drain 32, which can lead to a high-pressure accumulator 34 and over the radially outward of the drive means 14 directed away delivery stroke of the pump piston 12, fuel is displaced from the pump working chamber 24.
  • the plunger 18 is preferably designed as a roller tappet and has a plunger body 40, which is formed as a hollow cylinder. Within the plunger body 40, a bottom 42 is provided, on whose side facing away from the drive shaft 14, the pump piston 12 is supported at least indirectly with the piston foot. Surrounding the pump piston 12 is in the tappet body 40th also arranged a spring 44, which is for example a helical compression spring, and which is supported on the one hand at the bottom 42 and on the other hand on the cylinder head 20. By the spring 44 of the pump piston 12 and the plunger body 40 to the drive shaft 14 are acted upon.
  • a roller 46 is rotatably mounted, wherein the axis of rotation 47 of the roller 46 extends at least approximately parallel to the axis of rotation 15 of the drive shaft 14.
  • the roller 46 is arranged in the tappet body 40 on the side facing away from the pump piston 12 side of the bottom 42.
  • the roller 46 may be mounted on a bolt 48 inserted in the plunger body 40, wherein between the roller 46 and the bolt 48, a plain bearing bushing 50 may be arranged.
  • the bolt 48 is received in its end in two coaxial with each other in respect to the axis of rotation 47 of the roller 46 opposite walls 52 of the plunger body 40 provided holes 54.
  • the roller 46 may also be rotatably mounted via its outer jacket in a concavely concaved recess 56 of the tappet body 40 or a support element 57 inserted into the tappet body 40, in which case the pin 48 is omitted.
  • the gaps 56 increase starting from the bores 54 to the drive shaft 14. This can be achieved by increasing the distance between the mutually facing inner sides 53 of the walls 52 of the tappet body 40, starting from the bores 54 to the drive shaft 14.
  • the inner sides 53 of the walls 52 of the plunger body 40 may be, for example, beveled at least approximately conically. Alternatively, the inner sides 53 of the walls 52 of the plunger body 40 may also be curved.
  • the inner sides 53 of the walls 52 of the plunger body 40 extend approximately radially to the axis of rotation 47 of the roller 46 and the inner sides 53 facing end faces of the roller 46 are chamfered such that the column 58 to the drive shaft 14 increase ,
  • the drive shaft 14 is rotatably supported by at least one bearing point 60 in a housing 62, wherein the housing 62 may be a housing of the pump device or a housing of the internal combustion engine.
  • the drive shaft 14 is rotatably supported by two spaced apart in the direction of its axis of rotation 15 bearing points 60, wherein the bearing points 60 are arranged on opposite sides of the cam 16 or eccentric.
  • the bearings 60 are preferably designed as plain bearings and these may each comprise a bearing bush 64.
  • the bearings 60 respectively, as illustrated in Figures 1 and 2 by arrows liquid lubricant supplied, for example, lubricating oil from the lubricating oil circuit of
  • the lubricating medium is preferably supplied to the bearings 60 under elevated pressure so that it is pressed through the bearings 60. From the bearings 60 lubricant enters the direction of the axis of rotation 15 of the drive shaft 14 to the cam 16 or eccentric out. According to the invention, it is provided that the drive shaft 14 between at least one bearing point 60 and the cam 16 or eccentric having a shaped outer contour 66 that emerging from the bearing 60
  • Lubricant is selectively directed to the plunger 18 to ensure the lubrication of the plunger 18 or improve.
  • the outer contour 66 is designed in such a way that the diameter of the outer contour 66 increases away from the bearing point 60 and towards the cam 16 or eccentric. It can be provided that only between a bearing 60 and the cam 16 or eccentric an outer contour 66 may be provided. Preferably, between the cam 16 or eccentric and each bearing 60 each have an outer contour 66 is provided, both outer contours 66 are arranged and formed mirror images of each other.
  • the drive shaft 14 is shown with the outer contour 66 according to a first embodiment.
  • the outer contour 66 is at least approximately conical, so that its diameter increases linearly from the bearing 60 to the cam 16 or eccentric.
  • the outer contour 66 closes in the direction of the axis of rotation 15 of the drive shaft 14 seen directly or at a small distance to the bearing point 60 at.
  • the drive shaft 14, viewed in the direction of its axis of rotation 15, as viewed from the bearing point 60, starts toward the cam 16 or eccentric is first formed with a constant diameter and it is followed by the outer contour 66. The transition to the drive shaft 14 for
  • Outer contour 66 may be formed in a kink or rounded. Preferably, between the bearing 60 facing the end face of the cam 16 or eccentric and the bearing 60 facing away from the end
  • Diameter provided so that the outer contour 66 to the cam 16 or eccentric ends in an edge 70.
  • the section 68 forms a puncture on the drive shaft 14 between the cam 16 or eccentric and the edge 70 of the outer contour 66.
  • the edge 70 is arranged at least approximately in the region of the gap 56 between the roller 46 and the wall 52 of the tappet body 40.
  • the lubrication in the plunger 18 is improved or ensured, ie the bearing of the roller 46 on the pin 48 or in the recess 56 of the plunger body 40 or the support member 57 and / or the axial bearing of the roller 46 in the direction of its axis of rotation 47 in the plunger body 40th and / or the mounting of the bolt 48 in the bores 54 of the plunger body 40th
  • the drive shaft 14 is shown with the outer contour 66 according to a second embodiment, in which the outer contour 66 is concave, so that the diameter of the cam 16 or eccentric towards non-linearly increases but increases closer to the cam 16 or eccentric ,

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)

Abstract

L'invention concerne un dispositif de pompage, notamment un dispositif de pompage de carburant sous haute pression, qui possède au moins un élément de pompage (10) doté d'un piston de pompe (12) qui est entraîné dans un mouvement d'excursion par un arbre d'entraînement (14) par le biais d'un coulisseau (18). L'arbre d'entraînement (14) possède au moins une came (16) ou un excentrique sur lequel le coulisseau (18) s'appuie au moins indirectement. L'arbre d'entraînement (14) est monté pivotant par le biais d'au moins un point appui (60). Un fluide lubrifiant est acheminé audit au moins un point d'appui (60), dont il déborde vers ladite came (16) ou ledit excentrique. L'arbre d'entraînement (14) possède entre ledit point d'appui (60) et ladite came (16) ou ledit excentrique un contour extérieur (66) dont le diamètre augmente depuis ledit point appui (60) vers ladite came (16) ou ledit excentrique et qui, vu dans la direction de l'axe de rotation (15), se termine dans la zone du coulisseau (18). Le contour extérieur (66) permet d'acheminer du fluide lubrifiant au coulisseau (18) de manière ciblée.
PCT/EP2014/058926 2013-06-25 2014-04-30 Dispositif de pompage, notamment dispositif de pompage de carburant sous haute pression pour un système d'injection de carburant WO2014206609A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201480036607.3A CN105358819B (zh) 2013-06-25 2014-04-30 泵装置、尤其用于燃料喷射装置的燃料高压泵装置
EP14720621.3A EP3014107B1 (fr) 2013-06-25 2014-04-30 Dispositif de pompage, notamment dispositif de pompage de carburant sous haute pression pour un système d'injection de carburant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013212047.8 2013-06-25
DE102013212047.8A DE102013212047A1 (de) 2013-06-25 2013-06-25 Pumpvorrichtung, insbesondere Kraftstoffhochdruckpumpvorrichtung für eine Kraftstoffeinspritzeinrichtung

Publications (1)

Publication Number Publication Date
WO2014206609A1 true WO2014206609A1 (fr) 2014-12-31

Family

ID=50628833

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/058926 WO2014206609A1 (fr) 2013-06-25 2014-04-30 Dispositif de pompage, notamment dispositif de pompage de carburant sous haute pression pour un système d'injection de carburant

Country Status (4)

Country Link
EP (1) EP3014107B1 (fr)
CN (1) CN105358819B (fr)
DE (1) DE102013212047A1 (fr)
WO (1) WO2014206609A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106640457A (zh) * 2015-10-16 2017-05-10 通用汽车环球科技运作有限责任公司 用于内燃发动机的燃料单元泵的滚柱挺杆

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10677119B2 (en) 2016-03-01 2020-06-09 Cummins Inc. Systems and methods for reducing the oil volume and windage in fuel pumps
DE102016208581A1 (de) * 2016-05-19 2017-11-23 Robert Bosch Gmbh Kraftstoffhochdruckpumpe

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19804275A1 (de) * 1998-02-04 1999-08-12 Bosch Gmbh Robert Radialkolbenpumpe zur Kraftstoffhochdruckversorgung
US20030108443A1 (en) * 2001-12-12 2003-06-12 Masashi Suzuki Fuel injection pump
DE102006028851A1 (de) * 2006-06-23 2007-12-27 Schaeffler Kg Kolbenpumpe
WO2010079720A1 (fr) * 2009-01-06 2010-07-15 ヤンマー株式会社 Pompe d'injection de carburant
DE102009000766A1 (de) * 2009-02-11 2010-08-12 Robert Bosch Gmbh Kraftstoffhochdruckpumpe mit Rollenstößel
DE102011003678A1 (de) * 2011-02-07 2012-08-09 Robert Bosch Gmbh Hochdruckpumpe

Family Cites Families (7)

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JP3633314B2 (ja) * 1998-10-14 2005-03-30 三菱電機株式会社 高圧燃料ポンプ装置
DE10256528A1 (de) 2002-12-04 2004-06-24 Robert Bosch Gmbh Hochdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine
DE102007029416A1 (de) * 2007-06-26 2009-01-08 Robert Bosch Gmbh Kraftstoffhochdruckpumpenvorrichtung für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine und Brennkraftmaschine mit Kraftstoffhochdruckpumpenvorrichtung
KR101091402B1 (ko) * 2008-11-17 2011-12-07 현대자동차주식회사 자동차용 고압연료펌프장치
DE102010027792A1 (de) * 2010-04-15 2011-10-20 Robert Bosch Gmbh Hochdruckpumpe
CN101922320A (zh) * 2010-09-29 2010-12-22 奇瑞汽车股份有限公司 一种汽车发动机凸轮轴
KR20140019539A (ko) * 2012-08-06 2014-02-17 현대자동차주식회사 고압펌프용 롤러 구조

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19804275A1 (de) * 1998-02-04 1999-08-12 Bosch Gmbh Robert Radialkolbenpumpe zur Kraftstoffhochdruckversorgung
US20030108443A1 (en) * 2001-12-12 2003-06-12 Masashi Suzuki Fuel injection pump
DE102006028851A1 (de) * 2006-06-23 2007-12-27 Schaeffler Kg Kolbenpumpe
WO2010079720A1 (fr) * 2009-01-06 2010-07-15 ヤンマー株式会社 Pompe d'injection de carburant
DE102009000766A1 (de) * 2009-02-11 2010-08-12 Robert Bosch Gmbh Kraftstoffhochdruckpumpe mit Rollenstößel
DE102011003678A1 (de) * 2011-02-07 2012-08-09 Robert Bosch Gmbh Hochdruckpumpe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106640457A (zh) * 2015-10-16 2017-05-10 通用汽车环球科技运作有限责任公司 用于内燃发动机的燃料单元泵的滚柱挺杆

Also Published As

Publication number Publication date
CN105358819A (zh) 2016-02-24
CN105358819B (zh) 2019-01-01
EP3014107B1 (fr) 2017-04-12
EP3014107A1 (fr) 2016-05-04
DE102013212047A1 (de) 2015-01-08

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