EP0906511B1 - Pumpe, insbesondere hochdruckpumpe für eine kraftstoffeinspritzvorrichtung eines verbrennungsmotors - Google Patents

Pumpe, insbesondere hochdruckpumpe für eine kraftstoffeinspritzvorrichtung eines verbrennungsmotors Download PDF

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Publication number
EP0906511B1
EP0906511B1 EP97953670A EP97953670A EP0906511B1 EP 0906511 B1 EP0906511 B1 EP 0906511B1 EP 97953670 A EP97953670 A EP 97953670A EP 97953670 A EP97953670 A EP 97953670A EP 0906511 B1 EP0906511 B1 EP 0906511B1
Authority
EP
European Patent Office
Prior art keywords
pump
shaft
housing
pump shaft
internal combustion
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.)
Expired - Lifetime
Application number
EP97953670A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0906511A1 (de
Inventor
Hans-Peter Stiefel
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 EP0906511A1 publication Critical patent/EP0906511A1/de
Application granted granted Critical
Publication of EP0906511B1 publication Critical patent/EP0906511B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0448—Sealing means, e.g. for shafts or housings
    • 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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/05—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by internal-combustion engines
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S464/00—Rotary shafts, gudgeons, housings, and flexible couplings for rotary shafts
    • Y10S464/901—Rapid attachment or release

Definitions

  • the invention relates to a pump, in particular a high-pressure pump for a fuel injection device of an internal combustion engine, according to the preamble of claim 1.
  • DE 44 19 927 A1 describes a piston pump High pressure pump for fuel known in its pump housing a piston-cylinder unit comprising a working space is arranged and a pump shaft for driving the piston-cylinder unit is stored.
  • the pump shaft is in hers Center mounted and carries on its output side, flying end mounted an eccentric, over which the piston-cylinder unit is applied.
  • To drive the pump shaft is a drive gear on its end protruding from the pump housing attached.
  • This well-known pump which is used as a lubricant pump, has a relatively short overall length, but it can be not produce independently of the internal combustion engine. Besides, can the function of this known pump and its individual pump elements only after installation in the cylinder head wall of the engine being checked.
  • the pump with the characterizing features of claim 1 has that compared to the advantage that the non-rotatable mounting of Pump shaft on a shaft of the drive motor no bearings for the pump shaft in the pump housing required be, so that there is a shortened length of the pump. In addition, there is no pump shaft bearing increased service life in the pump housing.
  • the pump according to the invention can be used as a separate one Manufacture assembly and independent of the internal combustion engine check for functionality.
  • a transport bracket for the pump shaft is provided, preferably two from each other has spaced holding means.
  • the invention provided that the implementation of the pump shaft from the pump housing using an axial shaft seal is sealed, in which two flat surfaces close together be pressed. It can also be used for an eccentric Movement of the sealing surfaces against each other a flawless Ensure sealing.
  • a particularly unproblematic installation of the pump results itself if the pump shaft has a drive-side bearing journal has, which in a corresponding axial bore in the Shaft of the internal combustion engine is insertable.
  • This training also enables the particularly simple connection of a Auxiliary drive used for test operation of the pump for test purposes is required.
  • a pump according to the invention comprises a Pump housing 10 with one or more receiving areas 11 for one pump element 12 and one receiving area 13, in which a pump shaft 14 with its output end is arranged.
  • the receiving area 13 for the output side The end of the pump shaft 14 forms together with it facing sections of the receiving area or areas 11 a Inlet area 15 for a relatively low pressure standing medium to be conveyed, especially for under pressure standing fuel.
  • the inlet area 15 is over a Not shown feed line with a not shown Low pressure inlet connection is connected to the pump housing 10.
  • the pump element 12 comprises a piston as the working element 16, which is guided displaceably in a piston guide 17.
  • the piston guide 17 is inserted into a holding part 18 which the pump element 12 in the receiving area 11 of the pump housing 10 holds.
  • On the outer circumference of the holding part 18 is in the area of its inner end provided a seal 19 which the inlet area 15 seals against a conveyor area 20 in the the medium to be pumped with relatively high pressure, in particular is pumped at high pressure and the holding part 18 in the area surrounded by outlet bores 21 provided therein.
  • the Conveying area 20 is connected via a line, not shown a high-pressure outlet connection, not shown, on the pump housing 10 connected.
  • the conveying area becomes 20 on the outside through a seal 22 between the holding part 18 and the Receiving area 11 for the housing inner wall surrounding the pump element 12 sealed.
  • the piston 16 has an axial inlet channel 23, which on arranged in the piston guide 17 end of the piston 16 opens and the via a transverse inlet bore 24 in end of the piston 16 protruding from the piston guide 17 is connected to the inlet area 15.
  • the piston 16 carries an inlet valve 25 and thus delimits a working space in the piston guide 17 26 by an exhaust valve 27 against a high pressure exhaust area 28 is closable.
  • the high pressure outlet area 28 stands over the outlet bores 21 with the delivery area 20 in connection.
  • the inlet valve 25 is designed so that it during of the suction stroke of the piston 16, that is, if this comes from the Piston guide 17 moved out, opens so that during the Suction strokes to be conveyed medium from the inlet area 15 through the inlet bore 24, the inlet channel 23 and the open inlet valve 25 can flow into the work space 26.
  • the Delivery strokes i.e. when the piston 16 is in the piston guide 17 moves in, closes the inlet valve 25, so that the Working space 26 enclosed medium under pressure becomes.
  • a slide shoe 29 is attached, with which the piston 16 via one on a serving as a crank element Eccentric 31 of the pump shaft 14 rotatably mounted cam ring 30 supports so that the piston 16 can be driven by the pump shaft 14 is.
  • a spring 32 is provided which is at one end on the slide shoe 29 and with its other end on the holding part 18th supports.
  • driver lugs 36 are provided, which are diametrically opposed to each other with respect to the pump shaft axis A. opposite.
  • a circumferential retaining web 37 is provided, whose outer circumference is larger than that of the sealing collar 33.
  • an auxiliary pin 38 is attached, which is aligned coaxially with the journal 34 is.
  • the pump shaft 14 is in the pump housing 10 used that their auxiliary pin 38 with radial Play in an auxiliary bore provided in the pump housing 10 39 runs while the sealing collar 33 in the region of a passage opening 40 of the pump housing 10 is located in one of With respect to the pump shaft axis A axially extending centering collar 41 is surrounded.
  • the centering collar 41 and the auxiliary bore 39 are coaxially aligned with each other.
  • a radial shaft seal 43 is in the passage opening 40 tightly inserted, the inner diameter of which is larger than that Outer diameter of the sealing collar 33.
  • On the inner diameter of the A support surface 42 is provided for the radial shaft seal 43.
  • the Inner diameter is smaller than the outer diameter of the Sealing collar 33. Sealing lip 44 thus becomes sealing collar 33 deforms and lies sealingly against it.
  • Sealing lip 44 can also be, for example, a grooved ring or the like be used.
  • the inside diameter is expedient the sealing lip 44 chosen so that the sealing lip 44, too if in the manner described during transportation and storage is deformed, the inside of the pump against dust and Seals dirt.
  • the radial shaft seal 43 is shaped in this way and the sealing lip 44 is installed so that the pump shaft 14 comes to rest on the support surface 42 before the sealing lip 44 could be damaged by crushing.
  • the sealing collar 33 and the support surface 42 of the radial shaft seal 43 form together with the auxiliary pin 38 and Auxiliary hole 39 a transport bracket for the pump shaft 14 in the pump housing 10, which the pump shaft 14 at Motor housing 45 'attached pump essentially in its later operating position in the pump housing 10 holds.
  • the forming a first holding means Support surface 42 and that forming a second holding means Auxiliary bore 39 are axially spaced apart, so that the pump shaft 14 in the pump housing 10 cannot tilt. This can in particular prevent that the or Piston 16 too far from the associated piston guides 17 can be pulled out, what to assemble the pump Problems, especially damage to the piston 16 when Reinsert.
  • a second holding means can be used also an auxiliary pin or the like on the inner wall of the Pump housing 10 are provided. In this case it would be a corresponding auxiliary hole or the like in or on Eccentric 31 to be arranged.
  • the holding web 37 is used on the pump shaft 14 during transport and storage together with the radial shaft seal 43 as fallout protection for the pump shaft 14.
  • the bearing journal is first 34 of the pump shaft 14 in one, in particular as a fitting bore trained, axial bearing bore 47 in the shaft 46 and subsequently the centering collar 41 in a to the shaft 46 of the Internal combustion engine inserted coaxial mounting hole 48.
  • the pump shaft 14 is thus through the joining of the journal 34 of the pump shaft 14 into the bearing bore 47 of the shaft 46 radially and by meshing the Driving nose 36 with the groove 49 rotatably in the shaft 46 of the Internal combustion engine stored.
  • the radial mounting of the pump shaft 14 on the shaft 46 of the Internal combustion engine can also be reversed a journal on the shaft 46 and a bearing bore in realize the pump shaft 14. It is also possible to both the shaft 46 of the internal combustion engine as well as the pump shaft 14 to be provided with a bearing bore, and Bearing of the pump shaft 14 on the shaft 46 of the internal combustion engine to use a journal that fits into both bearing bores is used. In particular, this allows both on the not yet installed pump and on the internal combustion engine far beyond the pump housing 10 or the motor housing 45 'Avoid protruding parts, in particular can easily be damaged during transport.
  • the axial bearing of the pump shaft 14 can be in almost everyone done in any way, since only very low bearing forces are to be included.
  • the axial Bearing of the pump shaft 14 for example by support the driver lugs 36 on the shaft 46 of the internal combustion engine or by supporting the retaining web 37 on the support ring 44.
  • the receiving bore 48 there is a leakage space for from the inlet area 15 leaking through the radial shaft seal 43, medium to be conveyed, in particular fuel, is formed, the one in the outer peripheral surface of the centering collar 41 used sealing ring 52 against the external environment and by a lip seal 51 against the shaft 46 and thus against Lubricating oil from their shaft bearings is sealed.
  • This Leakage space is, for example, via a bore 48 'in the pump housing 10 disposed of when the medium to be pumped fuel is, in a manner not shown with an intake pipe of the internal combustion engine can be connected.
  • the bore 48 'in the pump housing 10 can also, as in FIG. 5 shown a bore 48 "provided in the motor housing 45 ' his.
  • the lip seal 51 which is designed to seal against lubricating oil is against harmful effects of the medium to be pumped, especially fuel, protected. This allows the Extend the life of the lip seal 51.
  • the pump shaft 14 runs during operation, that is if it is from Internal combustion engine via shaft 46, preferably the camshaft, is driven without its own radial bearing in the pump housing 10 free in this without grazing anywhere.
  • the on the wall 45 of the motor housing 45 'of the internal combustion engine attached assembly from pump housing 10, pump element 12, pump shaft 14 and radial shaft seal 43 can for example by means of screws 53, only one of which is shown is attached to the wall 45 of the internal combustion engine.
  • a pump shaft 14 ' can also be used in the journal 34 adjacent to the sealing collar 33, a transverse bore 54, in which, as in Fig. 5 in connection with shown a second embodiment of the invention, a driver pin 55 is used, which is on the outer circumference of the journal 34 protrudes so far that it is in engagement with the grooves 49 on the shaft 46 of the internal combustion engine is feasible.
  • the second embodiment includes the Pump according to the invention, a pump housing 10 in which one or a plurality of pump elements 12 and a pump shaft 14 'are arranged are.
  • the structure and arrangement of the pump element 12 corresponds the structure described with reference to FIG. 1.
  • radial shaft seal 43 instead of at 1 is provided radial shaft seal 43 however, in the pump shown in Fig. 5, an axial shaft seal 56 provided to the inlet area 15 against the Seal the receiving bore 48 in the wall 45 of the internal combustion engine.
  • the axial shaft seal 56 includes one on the sealing collar 33 pressed driver 57, in the, adjacent to the holding web 37 a spring 58 and a pressure ring 59 on the from the holding bridge 37 opposite side of the spring 58 is used. It is a sealing ring between the pressure ring 59 and the sealing collar 33 60 arranged, the pressure ring 59 for tolerance compensation in seals axially against the sealing collar 33.
  • a Slide ring 62 used, the one on its outer circumference Seal ring 63 carries.
  • a washer 64 attached to the extension 61 of the centering collar 41 z. B. attached by crimping is, the slide ring 62 together with the sealing ring 63 in Receiving area of the extension 61 of the centering collar 41.
  • the axial shaft seal 56 acts here as the first holding means the transport bracket, while the disc 64, which the Slide ring 62 in the extension 61 of the centering collar 41 holds, as fall-out protection during transport and storage serves the pump.
  • the auxiliary pin 38 is supported in the axial direction and preferably from one Low-friction material, in particular from a plain bearing material is made.
  • the use of the axial shaft seal 56 described the pump according to the invention has the advantage that a possible Radial play of the shaft 46 of the internal combustion engine, that too an eccentric rotation of the pump shaft axis A and thus leads to an eccentric circulation of the pressure ring 59, none Influence on the sealing of the pump, because the superimposed Sealing surfaces are flat and perpendicular to the nominal course the pump shaft axis A.
  • One due to radial play tilting of the shaft 46 of the internal combustion engine of the pressure ring 59 relative to the sealing collar 33 compensated by the spring 58 and the sealing ring 60.
  • the pump according to the invention for example using radial piston pumps with one pump element 12 or more, preferably with three pump elements arranged in a star shape 12 has been described, can also be used as an axial piston pump form.
  • the invention Pump in which the pump shaft 14, 14 'without self-storage in the pump housing 10 used tightly in this and in one Drive shaft is radially and non-rotatably supported, also as Gear pump or the like to perform.
  • the invention can be used with all types of pumps, in which one or more work elements via an eccentric a pump shaft are to be driven.
  • the pump according to the invention has the particular advantage that it as an independent assembly independent of other parts manufactured and as a fully pre-assembled, already sealed Assembly are checked directly at the manufacturer can.
  • the pump operation both the functionality of the individual pump elements 12, as well as their interaction with the pump shaft 14, 14 'and check the tightness completely.
  • Another The advantage is that later assembly on the final Location, i.e. on an internal combustion engine, none Dirt can get into the pump. Furthermore extends the elimination of the bearing of the pump shaft 14, 14 ' in the pump housing 10 the life of the pump.
  • the transport bracket provided in the pump according to the invention significantly simplifies the later assembly of the pump on Motor housing 45 'because the pump shaft 14, 14' and thus also the bearing pin 34 essentially in the intended operating position being held.
  • the spring 58 ensures a dimensional tolerance and wear largely independent, uniform and constant surface pressure between each other sliding surfaces of the pressure ring 59 and the sliding ring 62, that is, between the end face 65 and the sliding surface 66.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP97953670A 1997-03-27 1997-12-24 Pumpe, insbesondere hochdruckpumpe für eine kraftstoffeinspritzvorrichtung eines verbrennungsmotors Expired - Lifetime EP0906511B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19712872 1997-03-27
DE19712872A DE19712872A1 (de) 1997-03-27 1997-03-27 Pumpe, insbesonder Hochdruckpumpe für eine Kraftstoffeinspritzvorrichtung eines Verbrennungsmotors
PCT/DE1997/003011 WO1998044258A1 (de) 1997-03-27 1997-12-24 Pumpe, insbesondere hochdruckpumpe für eine kraftstoffeinspritzvorrichtung eines verbrennungsmotors

Publications (2)

Publication Number Publication Date
EP0906511A1 EP0906511A1 (de) 1999-04-07
EP0906511B1 true EP0906511B1 (de) 2001-11-14

Family

ID=7824785

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97953670A Expired - Lifetime EP0906511B1 (de) 1997-03-27 1997-12-24 Pumpe, insbesondere hochdruckpumpe für eine kraftstoffeinspritzvorrichtung eines verbrennungsmotors

Country Status (6)

Country Link
US (1) US6210129B1 (ja)
EP (1) EP0906511B1 (ja)
JP (1) JP2000514902A (ja)
DE (2) DE19712872A1 (ja)
ES (1) ES2168687T3 (ja)
WO (1) WO1998044258A1 (ja)

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US6464471B1 (en) * 1998-09-08 2002-10-15 Sta-Rite Industries, Inc. High-efficiency motor/pump system for jetted bath/spas
DE19906839A1 (de) * 1999-01-25 2000-08-03 Mannesmann Rexroth Ag Kraftstoffpumpe
DE10141887A1 (de) * 2001-08-28 2003-04-03 Bosch Gmbh Robert Hochdruckpumpen-Sensor-System
US6669453B1 (en) * 2002-05-10 2003-12-30 Robert H. Breeden Pump assembly useful in internal combustion engines
DE10229396A1 (de) * 2002-06-29 2004-01-22 Robert Bosch Gmbh Radialkolbenpumpe zur Kraftstoffhochdruckversorgung bei Einspritzsystemen von Brennkraftmaschinen mit verbessertem Wirkungsgrad
FR2883933A1 (fr) * 2005-04-04 2006-10-06 Hydro Leduc Soc Par Actions Si Perfectionnements aux pompes hydrauliques pour vehicules
DE102006028851A1 (de) 2006-06-23 2007-12-27 Schaeffler Kg Kolbenpumpe
DE102006035908A1 (de) * 2006-07-31 2008-02-07 Dr.Ing.H.C. F. Porsche Ag Kraftstoffpumpe für eine Brennkraftmaschine
DE102006048722A1 (de) * 2006-10-16 2008-04-17 Robert Bosch Gmbh Kolbenpumpe, insbesondere Kraftstoffhochdruckpumpe, mit Rollenstößel
IT1390856B1 (it) * 2008-08-01 2011-10-19 Bosch Gmbh Robert Pompa common rail di alta pressione con anello prismatico composto e impianto di alimentazione di combustibile di un motore common rail comprendente tale pompa
DE102008051192A1 (de) * 2008-10-14 2010-04-15 Continental Automotive Gmbh Anordnung aus einem Zylinderkopf und einer Radialkolbenpumpe
US8550047B2 (en) * 2009-06-09 2013-10-08 Honda Motor Co., Ltd. Valve control apparatus for internal combustion engine
DE102009054635A1 (de) * 2009-12-15 2011-06-16 Robert Bosch Gmbh Radialkolbenpumpe mit Exzenterlager, insbesondere für Fahrzeugbremssysteme
DE102011002811A1 (de) * 2011-01-18 2012-07-19 Robert Bosch Gmbh Kraftstoff-Fördereinrichtung für eine Brennkraftmaschine
DE102015213387A1 (de) * 2015-07-16 2017-01-19 Robert Bosch Gmbh Rotationskolbenpumpe
JP6341169B2 (ja) * 2015-09-11 2018-06-13 マツダ株式会社 エンジンの燃料ポンプ取付構造
JP6741199B2 (ja) * 2016-10-12 2020-08-19 日立オートモティブシステムズ株式会社 ポンプ装置及びブレーキ装置

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DE3630799A1 (de) * 1986-03-22 1987-09-24 Bosch Gmbh Robert Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
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DE19635164A1 (de) * 1996-08-30 1998-03-05 Bosch Gmbh Robert Kolbenpumpe

Also Published As

Publication number Publication date
JP2000514902A (ja) 2000-11-07
DE59705396D1 (de) 2001-12-20
DE19712872A1 (de) 1998-10-01
WO1998044258A1 (de) 1998-10-08
EP0906511A1 (de) 1999-04-07
ES2168687T3 (es) 2002-06-16
US6210129B1 (en) 2001-04-03

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