WO2013092968A2 - Pompe, en particulier pompe carburant haute pression pour un dispositif d'injection de carburant - Google Patents

Pompe, en particulier pompe carburant haute pression pour un dispositif d'injection de carburant Download PDF

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Publication number
WO2013092968A2
WO2013092968A2 PCT/EP2012/076580 EP2012076580W WO2013092968A2 WO 2013092968 A2 WO2013092968 A2 WO 2013092968A2 EP 2012076580 W EP2012076580 W EP 2012076580W WO 2013092968 A2 WO2013092968 A2 WO 2013092968A2
Authority
WO
WIPO (PCT)
Prior art keywords
pump
valve
housing
inlet valve
inlet
Prior art date
Application number
PCT/EP2012/076580
Other languages
German (de)
English (en)
Other versions
WO2013092968A3 (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
Publication of WO2013092968A2 publication Critical patent/WO2013092968A2/fr
Publication of WO2013092968A3 publication Critical patent/WO2013092968A3/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
    • 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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/361—Valves being actuated mechanically
    • 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
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/48—Assembling; Disassembling; Replacing
    • F02M59/485—Means for fixing delivery valve casing and barrel to each other or to pump casing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0421—Cylinders
    • 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
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • 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
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/855—Mounting of fuel injection apparatus using clamp elements or fastening means, e.g. bolts or screws
    • 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
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/462—Delivery valves
    • 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
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/464—Inlet valves of the check valve type

Definitions

  • the invention is based on a pump, in particular
  • High-pressure fuel pump for a fuel injection device according to the preamble of claim 1.
  • Such a pump in the form of a high-pressure fuel pump is known from DE 197 29 790 AI.
  • This pump has at least one pump element which, in turn, has a pump piston driven in a lifting movement, which is guided in a cylinder bore of a pump housing part and delimits a pump working space therein.
  • the pump working chamber is filled with medium during the suction stroke of the pump piston via an inlet valve and during the delivery stroke of the pump piston medium is conveyed via an outlet valve to an outlet from the pump working space.
  • a valve housing is provided, wherein the valve housing are arranged in a receptacle of a pump housing part.
  • Pump housing part in which the valve housing are arranged, is fastened together with the pump housing part, in which the cylinder bore is formed, to a base housing of the pump, to which usually several
  • Screws are provided. The many housing parts and screws require a large manufacturing and assembly costs of the pump. In addition, the outlet valve outlet returns to the pump main body
  • the base housing must be made of high pressure resistant material and the connection piece is may not be optimally located to connect to a high pressure accumulator leading line to this.
  • the pump according to the invention with the features according to claim 1 has the advantage that it is easy to produce and for the
  • valve housing no great installation effort is required.
  • the embodiment according to claim 5 allows a favorable arrangement of a connection piece and a simple connection of a hydraulic line to the pump.
  • the embodiment of claim 7 allows a simple way of connecting the exhaust valve to the
  • the embodiment of claim 9 allows a simple way of forming a valve seat for the exhaust valve.
  • the training according to claim 10 allows a simple way of connecting the
  • Inlet valve to the inlet The embodiment of claim 11 allows a simple way of sealing the pump working space.
  • a pump is shown, in particular a
  • the pump has at least one pump element 10, which in turn has a pump piston 12, which is driven at least indirectly by a drive shaft 14 in a lifting movement in at least approximately radial direction with respect to the axis of rotation 15 of the drive shaft 14.
  • the drive shaft 14 may be part of the pump or alternatively may also be provided that the pump does not have its own drive shaft and the drive shaft 14 is part of the internal combustion engine. The drive shaft 14 can thereby
  • the drive shaft 14 may have a cam 16 or eccentric for driving the pump piston 12.
  • the pump has a multi-part pump housing.
  • the pump piston 12 is tightly guided in a cylinder bore 20 of a first housing part 22 of the pump wherein the first housing part 22 is referred to below as the cylinder head. With its end facing away from the drive shaft 14 of limited
  • Pumping chamber 12 in the cylinder bore 20 has a pump working chamber 24.
  • the pump working chamber 24 has an inlet valve 26, which is for example an inlet check valve opening into the pump working chamber 24, a connection to an inlet 28 leading, for example, from a feed pump, via which the pump working space 24 radially inward to the axis of rotation 15 of the drive shaft 14 directed suction stroke of the pump piston 12 is filled with fuel.
  • the pump working chamber 24 also has an outlet valve 30, which is for example an outlet check valve opening out of the pump working chamber 24, a connection to a drain 32, which leads, for example, to a high-pressure fuel accumulator 34 and via the radially outward from the axis of rotation 15 of the drive shaft 14 directed delivery stroke of the pump piston 12 fuel from the
  • Pump workspace 24 is displaced.
  • the pump piston 12 is supported indirectly via a roller tappet 36 on the cam 16 of the drive shaft 14.
  • a roller 37 is rotatably mounted, which runs on the cam 16.
  • the pump piston 12 is connected to the roller tappet 36 in a manner not shown.
  • the roller tappet 36 and with this the pump piston 12 is acted upon by a spring 38 to the cam 16 of the drive shaft 14, so that the roller 37 constantly, so even during the suction stroke of the pump piston 12, remains in contact with the cam 16.
  • the housing of the pump has a second housing part 40, in which the drive shaft 14 can be rotatably supported via one or more bearings.
  • the inlet 28 can run through the housing part 40, in particular through an inner space 42 of the housing part 40, in which the cam 16 of the drive shaft 14 is arranged, and through holes or channels in the housing part 40th
  • the cylinder head 22 projects with an end region, in which the cylinder bore 20 is formed, in which the pump piston 12 is arranged, through an opening 44 of the second housing part 40 in the interior 42 thereof.
  • the adjoining the cylinder bore 20 portion of the cylinder head 22 is disposed outside of the second housing part 40 and has a flange 46 with a larger diameter than the opening 44.
  • the cylinder head 22 is located with its flange 46 at the opening 44 surrounding the outside of the
  • Housing part 40 and is connected for example by means of one or more screws 48 to the housing part 40. Between the flange 46 of the
  • a seal 50 may be provided.
  • the adjoining the flange 46 on the side facing away from the cylinder bore 20 side end portion 52 of the cylinder head 22 is at least in
  • a hollow cylindrical receptacle 54 is formed, in which the intake valve 26 and exhaust valve 30 described in more detail below are arranged.
  • the receptacle 54 is then arranged in the cylinder head 22 to the cylinder bore 20 in the direction of the longitudinal axis 21 and at least approximately coaxial with the cylinder bore 20.
  • the receptacle 54 has towards the cylinder bore 20 towards a portion 54a of smaller diameter and then a portion 54b with a larger diameter.
  • a plate-shaped valve housing 56 is provided, which is at least approximately circular cylindrical and whose
  • Diameter is only slightly smaller than the diameter of the portion 54 a of the receptacle 54.
  • the inlet valve housing 56 is thus with his to
  • Cylinder bore 20 facing end region with little clearance in the portion 54a of the receptacle 54 arranged.
  • the region of the inlet valve housing 56 facing away from the cylinder bore 20 is arranged in the section 54b of the receptacle 54, so that an annular space 58 is formed between the outer circumference of the inlet valve housing 56 and the section 54b of the receptacle 54.
  • the inlet valve 26 has a piston-shaped valve member 60 which is displaceably guided in a central bore 61 in the inlet valve housing 56 in the direction of the longitudinal axis 21 of the cylinder bore 20.
  • the bore 61 has, toward the cylinder bore 20, a section which is larger in diameter than the guide of the valve member 60, into which opening at least one, preferably a plurality of radial bores 62, which lead to the outer jacket of the
  • Cylinder head 22 a bore 63 is provided, which opens on the one hand in the annular space 58 and the other is connected to the extending, for example in the form of a bore through the housing part 40 inlet 28.
  • Cylinder bore 20 facing end portion of the bore 61 is a
  • Inlet valve housing 56 is formed.
  • the valve member 60 has a guided in the bore 61 cylindrical shaft 65 and a to this
  • Sealing surface 68 is formed, which cooperates with the valve seat 64 and is also correspondingly also at least approximately conical.
  • the inlet valve housing 56 On its side facing away from the cylinder bore 20, the inlet valve housing 56 has a recess or bore 69 which adjoins the bore 61 and has a diameter greater than the bore 61.
  • a locking spring 70 acting on the shaft 65 is arranged in the recess 69.
  • a cylinder bore 20 surrounding protruding sealing edge 71 is formed at the bottom of the receptacle 54, at which the
  • Inlet valve housing 56 comes with its the pump chamber 24 facing end face to the plant.
  • Inlet valve housing 56 may be formed, wherein the bottom of the receptacle 54 is then formed at least substantially planar.
  • Inlet valve housing 56 extends a bore 72 through which the outlet valve 30 communicates with the pump working space 24.
  • the bore 72 extends inclined to the longitudinal axis 21 of the cylinder bore 20 and opens on the
  • the pump working chamber 24 facing surface of the inlet valve housing 56 to which the bore 72 opens, is preferably arranged inclined so that it extends at least approximately perpendicular to the longitudinal axis 73 of the bore 72.
  • At the mouth of the bore 72 on the pump working chamber 24 side facing away from a valve seat 74 is formed for a valve member 76 of the exhaust valve 30, which will be described in more detail below.
  • the outlet valve 30 also has a plate-shaped valve housing 78, which, however, has a larger diameter than the inlet valve housing 56.
  • the outlet valve housing 78 is with little radial play in the receptacle 54 on the pump working chamber 24 opposite side of the
  • a sealing element 79 may be arranged in the form of an elastic sealing ring.
  • the sealing element 79 may be arranged in an annular groove in the outlet valve housing 78 or in the receptacle 54.
  • the exhaust valve housing 78 has a diameter-stepped bore 80, the larger diameter portion of the inlet valve housing 56 faces and in which the valve member 76 is slidably guided.
  • the bore 80 extends at least approximately parallel to the longitudinal axis 21 of the cylinder bore 20 but offset in the radial direction to this.
  • connection piece 82 is provided, in which the smaller diameter portion of the bore 80 opens.
  • the connecting piece 82 may be provided with an external thread, via which a hydraulic line can be connected, which leads to the memory 34.
  • the connecting piece 82 extends at least approximately parallel to the cylinder bore 20, but offset in the radial direction to this.
  • the exhaust valve housing 78 may on its the
  • Inlet valve housing 56 facing side have a recess into which the valve member 60 of the inlet valve 26 protrudes or immersed in the opening stroke.
  • valve member 76 of the outlet valve 30 is piston-shaped and cooperates with a sealing surface 84 formed thereon with valve seat 74 formed on the inlet valve housing 56.
  • Exhaust valve housing 78 is inclined to the bore 72 in
  • valve seat 74 is formed at the mouth of the bore 72 so that it is at least approximately coaxial with the bore 80.
  • the valve member 76 is closed by a closing spring 85 in FIG.
  • the receptacle 54 surrounding end portion 52 of the cylinder head 22 is provided with an external thread and the valve housing 56 and 78 are by means of an end portion 52 overstretching and on the external thread

Landscapes

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

Abstract

L'invention concerne une pompe comprenant au moins un élément (10) de pompe qui présente un piston (12) de pompe entraîné dans un mouvement de course, lequel est guidé de manière déplaçable dans un alésage cylindrique (20) d'une partie de carter (22) de la pompe et délimite un espace de travail (24) dans l'alésage cylindrique (20), l'espace de travail (24) pouvant être relié à un conduit d'amenée (28) par l'intermédiaire d'une soupape d'entrée (26) et à un conduit d'évacuation (32) par l'intermédiaire d'une soupape de sortie (30). La soupape d'entrée (26) et la soupape de sortie (30) présentent chacune un carter (56, 78) de soupape qui est disposé dans un logement (54) de la partie de carter (22) de la pompe. Le logement (54) est disposé au moins de manière approximativement coaxiale à l'alésage cylindrique (20) dans une région terminale (52) s'y raccordant de la partie de carter (22) de pompe, région dans laquelle l'alésage cylindrique (20) est formé, et les carters (56, 78) de la soupape d'entrée (26) et de la soupape de sortie (30) sont maintenus dans la partie de carter (22) de la pompe au moyen d'un élément de fixation (86) recouvrant la partie de carter (22) de la pompe sur son côté extérieur entourant le logement (54).
PCT/EP2012/076580 2011-12-23 2012-12-21 Pompe, en particulier pompe carburant haute pression pour un dispositif d'injection de carburant WO2013092968A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011089857.3 2011-12-23
DE201110089857 DE102011089857A1 (de) 2011-12-23 2011-12-23 Pumpe, insbesondere Kraftstoffhochdruckpumpe für eine Kraftstoffeinspritzeinrichtung

Publications (2)

Publication Number Publication Date
WO2013092968A2 true WO2013092968A2 (fr) 2013-06-27
WO2013092968A3 WO2013092968A3 (fr) 2013-08-15

Family

ID=47559423

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/076580 WO2013092968A2 (fr) 2011-12-23 2012-12-21 Pompe, en particulier pompe carburant haute pression pour un dispositif d'injection de carburant

Country Status (2)

Country Link
DE (1) DE102011089857A1 (fr)
WO (1) WO2013092968A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013220768A1 (de) * 2013-10-15 2015-04-16 Continental Automotive Gmbh Ventilanordnung
DE102014201372A1 (de) * 2014-01-27 2015-07-30 Robert Bosch Gmbh Hochdruckpumpe für ein Kraftstoffeinspritzsystem
GB201410823D0 (en) * 2014-06-18 2014-07-30 Delphi International Operations Luxembourg S.�.R.L. High pressure fuel pump
GB2553484A (en) * 2016-04-26 2018-03-14 Delphi Int Operations Luxembourg Sarl High pressure diesel pump
GB2581488A (en) * 2019-02-15 2020-08-26 Delphi Tech Ip Ltd Sealing assembly
US10907600B1 (en) * 2019-12-16 2021-02-02 Delphi Technologies Ip Limited Fuel pump and outlet valve seat thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19729790A1 (de) 1997-07-11 1999-01-14 Bosch Gmbh Robert Radialkolbenpumpe zur Kraftstoffhochdruckversorgung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS191051B1 (en) * 1975-03-27 1979-06-29 Jaromir Indra Injection unit of the injection pump for the combustion engines
JP2004183552A (ja) * 2002-12-03 2004-07-02 Denso Corp 燃料高圧供給用ポンプ
WO2009152659A1 (fr) * 2008-06-19 2009-12-23 Bosch Automotive Diesel Systems Co., Ltd. Ensemble pompe haute pression pour système de rampe commune
DE102008041594A1 (de) * 2008-08-27 2010-03-04 Robert Bosch Gmbh Kraftstoff-Hochdruckpumpe für eine Brennkraftmaschine
DE102010030231A1 (de) * 2010-06-17 2011-12-22 Robert Bosch Gmbh In einem Pumpenzylinderkopf vereintes Rückschlagventil und Saugventil
DE102010043963A1 (de) * 2010-11-16 2012-05-16 Robert Bosch Gmbh Pumpenelement für eine Kraftstoffhochdruckpumpe, Kraftstoffhochdruckpumpe

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19729790A1 (de) 1997-07-11 1999-01-14 Bosch Gmbh Robert Radialkolbenpumpe zur Kraftstoffhochdruckversorgung

Also Published As

Publication number Publication date
WO2013092968A3 (fr) 2013-08-15
DE102011089857A1 (de) 2013-06-27

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