EP1375915A1 - Pompe a pistons radiaux à rendement amélioré pour alimentation haute pression en carburant dans des systemes d'injection de moteurs a combustion interne - Google Patents

Pompe a pistons radiaux à rendement amélioré pour alimentation haute pression en carburant dans des systemes d'injection de moteurs a combustion interne Download PDF

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Publication number
EP1375915A1
EP1375915A1 EP03003558A EP03003558A EP1375915A1 EP 1375915 A1 EP1375915 A1 EP 1375915A1 EP 03003558 A EP03003558 A EP 03003558A EP 03003558 A EP03003558 A EP 03003558A EP 1375915 A1 EP1375915 A1 EP 1375915A1
Authority
EP
European Patent Office
Prior art keywords
pump
radial piston
fuel
pressure
high pressure
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.)
Granted
Application number
EP03003558A
Other languages
German (de)
English (en)
Other versions
EP1375915B1 (fr
Inventor
Helmut Rembold
Thomas Fuerst
Ulrich Aldinger
Markus Kuhn
Bernd Hirninger
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 EP1375915A1 publication Critical patent/EP1375915A1/fr
Application granted granted Critical
Publication of EP1375915B1 publication Critical patent/EP1375915B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets
    • 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
    • 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
    • F02M59/366—Valves being actuated electrically
    • 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
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/24—Bypassing

Definitions

  • the invention relates to a radial piston pump for High pressure fuel supply at Fuel injection systems of internal combustion engines, especially with common rail injection systems, with preferably several with respect to one in one Pump housing mounted drive shaft radially arranged Pump elements, the pump elements of the Drive shaft are operated and one suction side and have a high pressure side and with high pressure channels in the Pump housing, each of which is the high pressure side of a Pump element with a high pressure connection in the Connect the pump housing.
  • Such radial piston pumps are for example High pressure generation in internal combustion engines with gasoline direct injection known.
  • the pump is not regulated operated.
  • the common rail injection systems required pressure control takes place via a Pressure control valve on the common rail. This means that in Partial load operation. significant part of that of the Radial piston pump pump work done subsequently in Pressure control valve is dissipated again, what a low efficiency of the fuel injection system Consequence. In addition, the efficiency is this Radial piston pump not yet satisfactory.
  • a radial piston pump In a radial piston pump according to the invention High pressure fuel supply at Fuel injection systems of internal combustion engines, especially with common rail injection systems, with preferably several with respect to one in one Pump housing mounted drive shaft radially arranged Pump elements, the pump elements of the Drive shaft are operated and one suction side and have a high pressure side and with high pressure channels in the Pump housing, each of which is the high pressure side of a Pump element with a high pressure connection in the Connecting the pump housing is a volume control valve provided, which is a hydraulic in the open state Connection between the high pressure ducts and the suction sides the pump elements manufactures, and are between Volume control valve and the suction sides of the pump elements a storage volume and a throttle are provided.
  • the Flow rate of the radial piston pump over a wide range be managed.
  • the regulation takes place via a suitable one Control of the fast switching flow control valve, see above that prevents unnecessary pump work and thus the Efficiency of the fuel injection system is increased.
  • the at Open the pressure control valve fully punch through to the suction side of the radial piston pump and there to impermissibly high pressure loads and unwanted dynamic disturbances.
  • each High pressure duct the high pressure sides of two pump elements that connects hydraulically with one another in the shortest possible way the number of high pressure channels is 1 less than the number of Is pump elements, and that from a high pressure duct High pressure connection branches.
  • the pump housing run in two parts and the storage volume of one first housing part and a second housing part limit. This makes it possible to dispense with the sleeve, which helps to further reduce the assembly effort.
  • each pump element a piston, a Cylinder bore and a cylinder head that the Piston oscillates in the cylinder bore and one Delivery space limits that on the suction side a first Check valve is arranged that the first Check valve is integrated in the piston, and that on a second check valve is arranged on the high pressure side is.
  • the load capacity of the radial piston pump according to the invention whose drive shaft in the pump housing of the Shaft plain bearing is further increased if the plain bearing of fuel, especially of the cool one flowing through the fuel connection Fuel that is flowed through. This is cooling and / or lubrication of the plain bearing, which is what Resilience and service life increased.
  • the cooling of the Plain bearing can be further improved if in the Drive shaft or a bearing shell of the plain bearing multiple holes are provided by fuel be flowed through. It is for the invention Effect does not matter whether the holes are directly in the Drive shaft can be attached or in a on the Drive shaft applied sleeve are arranged.
  • piston base plate is articulated on the piston, and that the lifting movement of the eccentric section of the Drive shaft via a polygon ring on the Piston base plate is transferred. It did Simulation calculations showed that this Design the mechanical stress of those involved Reduced components and reduced friction losses become.
  • Fig. 1 is a block diagram of an inventive Radial piston pump 1 shown.
  • the radial piston pump 1 has a suction side 3 and a (high) pressure side 5, which over a third check valve 7 with a common rail 9 in Connection is established.
  • the pressure control in the common rail 9 takes place via a pressure control valve 11, which excess fuel from the common rail 9 into one Fuel return 13 conducts.
  • the fuel return 13 opens into the suction side 3 of the radial piston pump 1.
  • the Suction side 3 is from a not shown here Fuel tank supplied with fuel.
  • a volume control valve 15 is provided between pressure side 5 and fuel return 13, the again hydraulically connected to the suction side 3 stands. If that Quantity control valve 15, as shown in Fig. 1, opened is on the pressure side 5 of the radial piston pump 1 Pressure build up take place because of a hydraulic connection over the fuel return 13 with the suction side-3. In this state, the radial piston pump 1 does not deliver Fuel into the common rail 9 because of the pressure in the common rail 9 much higher than the pressure on the suction side 3 the radial piston pump 1. If the volume control valve 15 is closed, is the hydraulic connection between Suction side 3 and pressure side 5 via the fuel return 13 interrupted, so that a pressure build-up in the Pump elements 17 of the radial piston pump 1 take place can.
  • the radial piston pump 1 delivers Fuel into the common rail 9 as soon as that of the Pump elements 17 pressure greater than that in Common Rail 9 is prevailing pressure.
  • Radial piston pump 1 is an embodiment of one Radial piston pump 1 according to the invention in a longitudinal section (2a) and a cross section along the section line B-B (2b).
  • the radial piston pump 1 consists of a pump housing 23, which is made in two parts.
  • the pump housing 23 thus consists of a first housing part 23a and a second housing part 23b.
  • the memory 19 forms in the second housing part 23b.
  • the throttle 21 is arranged in the second housing part 23b.
  • a drive shaft 27 is rotatable in the pump housing 23 stored.
  • the drive shaft 27 has an eccentric Section 29 with a polygon ring 31.
  • the eccentric Section 29 reaches over the polygon ring 31 freely over the circumferentially distributed pump elements 17, of which in Fig. 2a only one is visible.
  • Each pump element 17 has a piston 33, which in a cylinder bore 35 is guided and a delivery chamber 37 limited.
  • the pump elements 17 are radial from the outside inserted into the pump housing 23 and via a Fixing screw 39 clamped to the pump housing 23.
  • a first check valve 41 is provided in the piston 33, which draws fuel into the delivery space 37 allows. Via a transverse bore 41 in the piston 33 hydraulic connection between the first check valve 41 and the suction side 3 manufactured. The one from not shown fuel drawn fuel flows onto the Intake side 3 of the radial piston pump 1 and flows through then a plain bearing 45 of the drive shaft 27 before it is sucked in by the pump elements 17.
  • the high-pressure channels 51a and 51b connect the three pump elements 17 by the shortest route, ie in this case that the high-pressure channels 51a and 51b are designed in a straight line.
  • there are three pump elements 17 and two high-pressure channels 51a and 51b. Transferred to radial piston pumps with a different number m of pump elements 17 applies to the number n of high-pressure channels n m - 1.
  • the quantity control valve 15 is on the high-pressure duct 51a connected. When the quantity control valve 15 is open, As mentioned in connection with FIG. 1, one in FIG. 2b invisible hydraulic connection between the High pressure channels 51a and 51b on the one hand and the suction side 3 on the other hand.
  • a high-pressure connection 53 branches off from the high-pressure duct 51b.
  • the connection piece 55 is the third check valve 7 integrated.
  • Fig. 2b From Fig. 2b it can be seen that the piston 33 with a Place piston base plate 57 on polygon ring 31.
  • the Piston base plate 57 is connected via a ball joint 59 connected to the piston 33 so that the piston foot plate 57 optimally rests on the polygon ring 31.
  • 'Optimal' means in this context that no local Stress peaks occur and depend on the dynamic load and the lubrication condition between Piston base plate 57 and polygon ring 31 the piston base plate 57 always rests on the polygon ring 31 over a large area.
  • FIG. 3 another embodiment is one Radial piston pump 1 according to the invention in longitudinal section shown.
  • the same components are the same Provide reference numerals, and that applies to a Embodiment said for the others Embodiments accordingly.
  • the housing 23 is in one piece executed.
  • the memory 19 is a puncture 61 in the Pump housing 23 formed. This puncture is made by a Sleeve 63, which the storage volume of the storage 19 of hydraulically separates the suction side 3, seals.
  • the throttle 21 is arranged.
  • FIG. 4 and 5 show the plain bearing 45 along one Section line I-I and a section line J-J (see Fig. 2a) in Detail. From Fig. 4 it can be seen that on the Drive shaft 27 a sleeve 65 was pressed into the Longitudinal grooves 67 are incorporated. The sleeve 65 is in one Bearing shell 69, which in the first housing part 23a is pressed, rotatably mounted. The grooves 67 will be like results from Fig. 2a in connection with Fig. 4, of which cool fuel drawn from the fuel tank flows through. As a result, the sleeve 65 and the Bearing shell 69 cooled, which is particularly important when using the radial piston pump according to the invention in Internal combustion engines with petrol direct injection very much is helpful. It is without for the invention Meaning whether the fuel through grooves 67 or in the Drive shaft 27 machined holes (not shown) flows. It is essential that the cool Fuel from the fuel tank to cool the Plain bearing 45 is used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)
EP20030003558 2002-06-29 2003-02-17 Pompe a pistons radiaux à rendement amélioré pour alimentation haute pression en carburant dans des systemes d'injection de moteurs a combustion interne Expired - Lifetime EP1375915B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002129396 DE10229396A1 (de) 2002-06-29 2002-06-29 Radialkolbenpumpe zur Kraftstoffhochdruckversorgung bei Einspritzsystemen von Brennkraftmaschinen mit verbessertem Wirkungsgrad
DE10229396 2002-06-29

Publications (2)

Publication Number Publication Date
EP1375915A1 true EP1375915A1 (fr) 2004-01-02
EP1375915B1 EP1375915B1 (fr) 2007-12-26

Family

ID=29716740

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030003558 Expired - Lifetime EP1375915B1 (fr) 2002-06-29 2003-02-17 Pompe a pistons radiaux à rendement amélioré pour alimentation haute pression en carburant dans des systemes d'injection de moteurs a combustion interne

Country Status (2)

Country Link
EP (1) EP1375915B1 (fr)
DE (2) DE10229396A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007002730A1 (de) * 2007-01-18 2008-07-31 Siemens Ag Radialkolbenpumpe zur Kraftstoffföderung sowie Herstellungverfahren hierfür
WO2009115356A1 (fr) * 2008-03-17 2009-09-24 Robert Bosch Gmbh Pompe haute pression
WO2011101203A1 (fr) * 2010-02-16 2011-08-25 Robert Bosch Gmbh Culasse pour une pompe de carburant haute pression
GB2569172A (en) * 2017-12-08 2019-06-12 Delphi Tech Ip Ltd High pressure fuel pump

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19830302A1 (de) * 1998-07-07 1999-11-04 Bosch Gmbh Robert Außen abgestützte Radialkolbenpumpe
WO2000039450A1 (fr) * 1998-12-29 2000-07-06 Robert Bosch Gmbh Pompe a piston pour carburant sous haute pression
DE19924064A1 (de) * 1999-05-26 2000-11-30 Hydraulik Ring Gmbh Verdrängerpumpe
US6186120B1 (en) * 1997-12-17 2001-02-13 Robert Bosch Gmbh High pressure pump for supplying fuel in fuel injection system of internal combustion engines

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4126640B4 (de) * 1991-08-12 2005-06-16 Robert Bosch Gmbh Pumpenanordnung mit einer Vorförderpumpe und einer Radialkolbenpumpe
DE19712872A1 (de) * 1997-03-27 1998-10-01 Bosch Gmbh Robert Pumpe, insbesonder Hochdruckpumpe für eine Kraftstoffeinspritzvorrichtung eines Verbrennungsmotors
JPH1172014A (ja) * 1997-06-24 1999-03-16 Unisia Jecs Corp 燃料加圧用ポンプ
JP3505962B2 (ja) * 1997-07-11 2004-03-15 三菱電機株式会社 高圧燃料ポンプのレゾネータ装置
DE19802476A1 (de) * 1998-01-23 1999-07-29 Bosch Gmbh Robert Pumpenanordnung zur Kraftstoffhochdruckversorgung
DE19802475A1 (de) * 1998-01-23 1999-07-29 Bosch Gmbh Robert Radialkolbenpumpe zur Kraftstoffhochdruckerzeugung
JP2922488B1 (ja) * 1998-02-13 1999-07-26 三菱電機株式会社 高圧燃料ポンプのフィード圧脈動低減装置
DE19818421B4 (de) * 1998-04-24 2017-04-06 Robert Bosch Gmbh Kraftstoffversorgungsanlage einer Brennkraftmaschine
DE19943160A1 (de) * 1998-09-10 2000-03-16 Denso Corp Kraftstoffeinspritzpumpe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6186120B1 (en) * 1997-12-17 2001-02-13 Robert Bosch Gmbh High pressure pump for supplying fuel in fuel injection system of internal combustion engines
DE19830302A1 (de) * 1998-07-07 1999-11-04 Bosch Gmbh Robert Außen abgestützte Radialkolbenpumpe
WO2000039450A1 (fr) * 1998-12-29 2000-07-06 Robert Bosch Gmbh Pompe a piston pour carburant sous haute pression
DE19924064A1 (de) * 1999-05-26 2000-11-30 Hydraulik Ring Gmbh Verdrängerpumpe

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007002730A1 (de) * 2007-01-18 2008-07-31 Siemens Ag Radialkolbenpumpe zur Kraftstoffföderung sowie Herstellungverfahren hierfür
DE102007002730B4 (de) * 2007-01-18 2012-03-01 Continental Automotive Gmbh Radialkolbenpumpe zur Kraftstoffförderung sowie Herstellungsverfahren hierfür
WO2009115356A1 (fr) * 2008-03-17 2009-09-24 Robert Bosch Gmbh Pompe haute pression
WO2011101203A1 (fr) * 2010-02-16 2011-08-25 Robert Bosch Gmbh Culasse pour une pompe de carburant haute pression
CN102762859A (zh) * 2010-02-16 2012-10-31 罗伯特·博世有限公司 用于高压燃料泵的缸盖
CN102762859B (zh) * 2010-02-16 2015-11-25 罗伯特·博世有限公司 用于高压燃料泵的缸盖
GB2569172A (en) * 2017-12-08 2019-06-12 Delphi Tech Ip Ltd High pressure fuel pump
GB2569172B (en) * 2017-12-08 2020-04-22 Delphi Tech Ip Ltd High pressure fuel pump

Also Published As

Publication number Publication date
DE10229396A1 (de) 2004-01-22
DE50308878D1 (de) 2008-02-07
EP1375915B1 (fr) 2007-12-26

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