WO2012079831A1 - Pompe haute pression - Google Patents

Pompe haute pression Download PDF

Info

Publication number
WO2012079831A1
WO2012079831A1 PCT/EP2011/069115 EP2011069115W WO2012079831A1 WO 2012079831 A1 WO2012079831 A1 WO 2012079831A1 EP 2011069115 W EP2011069115 W EP 2011069115W WO 2012079831 A1 WO2012079831 A1 WO 2012079831A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure pump
drive shaft
pump
rotation
roller
Prior art date
Application number
PCT/EP2011/069115
Other languages
German (de)
English (en)
Inventor
Alfons Schoetz
Markus Schetter
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 ES11778860.4T priority Critical patent/ES2527666T3/es
Priority to EP11778860.4A priority patent/EP2652326B1/fr
Priority to CN201180060143.6A priority patent/CN103261684B/zh
Publication of WO2012079831A1 publication Critical patent/WO2012079831A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F04B1/0408—Pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0413—Cams
    • F04B1/0417—Cams consisting of two or more cylindrical elements, e.g. rollers
    • 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
    • F04B1/0439—Supporting or guiding means for the pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/053—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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00—Valve arrangements comprising rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2307/00—Preventing the rotation of tappets

Definitions

  • the present invention relates to a high-pressure pump for a fuel injection device of an internal combustion engine according to the preamble of claim 1.
  • high pressure pumps For pressurizing the fuel at high pressure in a fuel injection system, such as in a common rail system, among other high pressure pumps with one or more pump pistons are used, which indirectly from a drive shaft, for example via a cam or an eccentric, which with a roller of a plunger assembly is in contact, be placed in a stroke movement to perform a suction stroke and a pressure stroke.
  • a suction stroke fuel is sucked into a pump working space of the high pressure pump, and during the pressure stroke, the sucked fuel is compressed and output to the high pressure accumulator of the common rail system.
  • Such high-pressure pumps can be designed as a plug-in pump.
  • DE 10 2008 041 383 A1 describes a plug-in pump for feeding highly compressed fuel into a high-pressure accumulator for supplying a combustion chamber of an internal combustion engine, wherein the plug-in pump comprises a housing having a pump chamber by a suction line with a suction valve and by a high-pressure line with a High pressure valve is connected.
  • a plug-pump high-pressure pump is described in DE 10 2008 001 018 A1.
  • the high-pressure pump has a pump housing and a pump piston, which is displaceably guided in a pump cylinder head and can be moved via a camshaft of the internal combustion engine for intake 5 and compression of fuel.
  • the pump piston is on an am
  • a rod seal 10 is disposed between the plunger body and the pump housing and placed between plunger body and roller shoe, an O-ring.
  • a high-pressure pump for a fuel injection system of an internal combustion engine, wherein the high-pressure pump has at least one pump piston, which is generated by the rotation of a drive shaft
  • the plunger assembly comprises a plunger body and a roller, wherein the stable alignment
  • the anti-rotation device is formed by a projection provided on the tappet body, which projection bears in a form-fitting manner on a recess formed in the cam or eccentric arranged on the drive shaft.
  • This configuration of the anti-twist device is structurally easy to implement. An elaborate machining of the plunger bore in the engine block or in the pump housing is not necessary. Also, the guide diameter of the plunger body is not reduced or weakened thereby.
  • the projection is formed as a guide tongue on the plunger body. The guide tongue can also be designed in several parts depending on the design and manufacturing conditions of the plunger body.
  • the recess is formed as a running groove.
  • the formation of the running groove in the cam or eccentric is a particularly cost-effective solution, since the running groove in the drive shaft during turning can be made cost-neutral.
  • the guide tongue is formed integrally with the plunger body.
  • the guide tongue projects beyond the raceway of the drive shaft.
  • a game or a minimum clearance is provided between the track of the drive shaft and the guide tongue.
  • the guide tongue has a contact surface which is opposite to the running groove, wherein the contact surface is convex or arched, in particular substantially convex.
  • the roller is rotatably mounted via a bolt and a socket arranged on the bolt.
  • the guide tongue is through the
  • parts of the high-pressure pump in particular a cylinder head and / or a drive, are designed as a plug-in pump unit.
  • the plug-in pump unit for example, the plunger assembly allows easy installation in the engine block or in the pump housing.
  • FIG. 1 shows a section through a high pressure pump according to an embodiment.
  • FIG. 2 is a partial sectional view of a plunger assembly according to an embodiment
  • FIG. 3 is a sectional view of a plunger assembly and a drive shaft according to one embodiment
  • Fig. 4 is a schematic representation for calculating the game.
  • FIG. 1 shows a section through a high-pressure pump 1 designed as a plug-in pump for a fuel injection system.
  • the high-pressure pump 1 shown here is used in a common-ail system.
  • the high-pressure pump 1 has a pump housing 2 with a cylinder head 3, in which a pump element with a pump piston 4, which by a not shown here rotatably driven drive shaft (see FIG. 3) is driven indirectly in a lifting movement in at least approximately radial direction to a rotational axis of the drive shaft.
  • the pump piston 4 is guided in a cylinder bore 5 in a shank portion 6 of the cylinder head 3 tightly displaceable and limited with its end facing away from the drive shaft in the cylinder bore 5 a pump working space 7.
  • a spring 8 is arranged to the shaft portion 6 around.
  • the pump working chamber 7 is supplied via a fuel inlet 9 from a fuel tank, not shown, of the high-pressure injection system fuel. At the mouth of the fuel inlet 9 in the pump working chamber 7, an opening into the pump working chamber 7 inlet valve 10 is arranged.
  • the pump working chamber 7 also has a fuel outlet 1 1 extending in the cylinder head 3, in which an outlet valve 12 is arranged, a connection to the high-pressure accumulator (not shown) of the fuel injection system.
  • the pump element is associated with a plunger assembly 13, via which the pump piston 4 is supported on the cam of the drive shaft, not shown here.
  • the plunger assembly 13 comprises a plunger body 14 having a substantially hollow cylindrical portion 15 and a roller receiving portion 16, in which a roller 17 is rotatably mounted on a pin 18 and arranged thereon socket 19.
  • the plunger body is provided with an anti-rotation device, which will be described in detail in connection with FIGS. 2 and 3.
  • the plunger body 14 is an outside, in the engine block or in the pump housing guided plunger body. On the outer diameter through holes are provided, which ensure further lubrication of the drive shaft with further holes in the inside.
  • the pump piston 4 is taken over a retaining plate 21 during the downward movement. The retaining plate is held down by the spring 8.
  • FIG. 2 is a partial sectional view of a plunger assembly 13 according to an embodiment.
  • the roller 17 is arranged in the roller receiving portion 15, which is rotatably mounted on the pin 18 having the bushing 19.
  • a locking ring 20 ensures the axial fixation of the roller 17.
  • the rotation is pestle assembly side by a provided on the plunger body 14 projection 22, as Guide tongue 23 is formed realized.
  • the guide tongue 23 is integrated directly on the plunger body 14 and projects from this downwards.
  • FIG. 3 is a sectional view of a plunger assembly 13 according to an embodiment, the roller 17 on a drive shaft 24 and at one on the
  • the guide tongue 23 is slightly above the track of the drive shaft 24 via.
  • the rotation is effectively prevented via a positive connection of the guide tongue 23 to the groove 27.
  • the guide tongue 23 may not start.
  • a game 28 between the guide tongue 23 and the groove 27 is provided, which must be chosen so that the axial play and guide tolerances of the drive line are taken into account.
  • the possible free torsional backlash of the plunger body 14 is thereby adjusted, as will be explained in connection with FIG. 4.
  • Fig. 4 is a schematic representation for determining the minimum clearance 28 between the guide tongue 23 and the groove 27
  • the free angular play ß results from trigonometric functions in dependence of the guide tab clearance s, the guide tongue width l b and the center distance /.
  • the starting can be performed as in the embodiment shown in Fig. 4 on one side or on two sides.
  • a contact surface 31 which is opposite to the running groove 27, convex or convex, in order to reduce wear and increase the robustness.

Landscapes

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

Abstract

L'invention concerne une pompe haute pression destinée au système d'injection de carburant d'un moteur à combustion interne, ladite pompe haute pression présentant au moins un piston de pompe qui est entraîné par la rotation d'un arbre d'entraînement autour d'un axe de rotation par l'intermédiaire d'au moins une came ou un d'excentrique agencé sur l'arbre d'entraînement et par un ensemble poussoir agencé sur le piston de pompe dans un mouvement alternatif dans une direction sensiblement radiale par rapport à l'axe de rotation de l'arbre d'entraînement, l'ensemble poussoir présentant un corps de poussoir et un galet de roulement. Ladite pompe présentant également une sécurité anti-rotation assurant une orientation stable du galet de roulement sur l'arbre d'entraînement.
PCT/EP2011/069115 2010-12-17 2011-10-31 Pompe haute pression WO2012079831A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES11778860.4T ES2527666T3 (es) 2010-12-17 2011-10-31 Bomba de alta presión
EP11778860.4A EP2652326B1 (fr) 2010-12-17 2011-10-31 Pompe à haute pression
CN201180060143.6A CN103261684B (zh) 2010-12-17 2011-10-31 高压泵

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010063363A DE102010063363A1 (de) 2010-12-17 2010-12-17 Hochdruckpumpe
DE102010063363.1 2010-12-17

Publications (1)

Publication Number Publication Date
WO2012079831A1 true WO2012079831A1 (fr) 2012-06-21

Family

ID=44906099

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/069115 WO2012079831A1 (fr) 2010-12-17 2011-10-31 Pompe haute pression

Country Status (5)

Country Link
EP (1) EP2652326B1 (fr)
CN (1) CN103261684B (fr)
DE (1) DE102010063363A1 (fr)
ES (1) ES2527666T3 (fr)
WO (1) WO2012079831A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014053291A1 (fr) * 2012-10-04 2014-04-10 Robert Bosch Gmbh Carter pour une pompe haute pression
EP2821646A1 (fr) * 2013-07-01 2015-01-07 Delphi International Operations Luxembourg S.à r.l. Pompe haute pression
US20150176690A1 (en) * 2013-12-23 2015-06-25 Aktiebolaget Skf Cam follower roller device
JP2017527734A (ja) * 2014-09-15 2017-09-21 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング ピストンポンプ
US10487785B2 (en) 2015-04-28 2019-11-26 Cummins Inc. Pinless tappet in a common rail high pressure fuel pump
US10859050B2 (en) 2019-03-07 2020-12-08 Denso Corporation Fuel injection pump

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012218078A1 (de) 2012-10-04 2014-04-10 Robert Bosch Gmbh Hochdruckpumpe, insbesondere Kraftstoffhochdruckpumpe, für eine Brennkraftmaschine
DE102012218086A1 (de) 2012-10-04 2014-04-10 Robert Bosch Gmbh Hochdruckpumpe, insbesondere Kraftstoffhochdruckpumpe, einer Brennkraftmaschine
DE102012218075A1 (de) 2012-10-04 2014-04-10 Robert Bosch Gmbh Hochdruckpumpe, insbesondere Kraftstoffhochdruckpumpe
DE102012222450A1 (de) 2012-12-06 2014-06-12 Robert Bosch Gmbh Gehäuse für ein Hochdruckpumpenelement
DE102013212237A1 (de) 2013-06-26 2014-12-31 Robert Bosch Gmbh Hochdruckpumpe
DE102014223795A1 (de) * 2014-11-21 2016-05-25 Robert Bosch Gmbh Pumpe, insbesondere eine Kraftstoffhochdruckpumpe
DE102014225794A1 (de) * 2014-12-15 2016-06-16 Robert Bosch Gmbh Hochdruckpumpe sowie Verfahren zur Herstellung einer Hochdruckpumpe
DE102016203768B4 (de) * 2015-11-12 2017-10-26 Robert Bosch Gmbh Pumpe, insbesondere Hochdruckpumpe eines Kraftstoffeinspritzsystems, mit einem Montageverbund von Stößel-Baugruppe und Pumpenzylinderkopf, insbesondere durch eine Rastverbindung zwischen Federteller und Stößelkörper
EP3176421B1 (fr) 2015-12-03 2018-07-04 Aktiebolaget SKF Dispositif de galet à contre-came avec corps de poussoir renforcé
ITUA20164365A1 (it) * 2016-06-14 2017-12-14 Bosch Gmbh Robert Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4152953A (en) * 1977-12-15 1979-05-08 General Motors Corporation Roller cam follower with anti-rotation device
DE102004048711A1 (de) * 2004-10-06 2006-04-13 Siemens Ag Radialkolbenpumpe mit Rollenstößel
DE102006052484A1 (de) * 2006-11-07 2008-05-08 Robert Bosch Gmbh Nockenwellentrieb mit einer geometrischen Laufrollenstabilisierung
EP2079923A1 (fr) * 2006-10-16 2009-07-22 Robert Bosch GmbH Pompe à piston, notamment pompe de carburant haute pression, avec poussoir à galet
DE102008007406A1 (de) * 2008-02-04 2009-08-06 Continental Automotive Gmbh Hochdruckpumpe
WO2009115353A1 (fr) * 2008-03-17 2009-09-24 Robert Bosch Gmbh Pompe haute pression
DE102008015548A1 (de) * 2008-03-25 2009-10-01 Robert Bosch Gmbh Hochdruckpumpe
DE102008001018A1 (de) 2008-04-07 2009-10-08 Robert Bosch Gmbh Hochdruckkraftstoffpumpe als Steckpumpe
DE102008040242A1 (de) * 2008-07-08 2010-01-14 Robert Bosch Gmbh Einspritzpumpe
DE102008041383A1 (de) 2008-08-20 2010-02-25 Robert Bosch Gmbh Steckpumpe

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4152953A (en) * 1977-12-15 1979-05-08 General Motors Corporation Roller cam follower with anti-rotation device
DE102004048711A1 (de) * 2004-10-06 2006-04-13 Siemens Ag Radialkolbenpumpe mit Rollenstößel
EP2079923A1 (fr) * 2006-10-16 2009-07-22 Robert Bosch GmbH Pompe à piston, notamment pompe de carburant haute pression, avec poussoir à galet
DE102006052484A1 (de) * 2006-11-07 2008-05-08 Robert Bosch Gmbh Nockenwellentrieb mit einer geometrischen Laufrollenstabilisierung
DE102008007406A1 (de) * 2008-02-04 2009-08-06 Continental Automotive Gmbh Hochdruckpumpe
WO2009115353A1 (fr) * 2008-03-17 2009-09-24 Robert Bosch Gmbh Pompe haute pression
DE102008015548A1 (de) * 2008-03-25 2009-10-01 Robert Bosch Gmbh Hochdruckpumpe
DE102008001018A1 (de) 2008-04-07 2009-10-08 Robert Bosch Gmbh Hochdruckkraftstoffpumpe als Steckpumpe
DE102008040242A1 (de) * 2008-07-08 2010-01-14 Robert Bosch Gmbh Einspritzpumpe
DE102008041383A1 (de) 2008-08-20 2010-02-25 Robert Bosch Gmbh Steckpumpe

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014053291A1 (fr) * 2012-10-04 2014-04-10 Robert Bosch Gmbh Carter pour une pompe haute pression
EP2821646A1 (fr) * 2013-07-01 2015-01-07 Delphi International Operations Luxembourg S.à r.l. Pompe haute pression
WO2015000654A1 (fr) * 2013-07-01 2015-01-08 Delphi International Operations Luxembourg S.À R.L. Pompe haute pression
CN105658958A (zh) * 2013-07-01 2016-06-08 德尔福国际运营卢森堡有限公司 高压泵
JP2016526632A (ja) * 2013-07-01 2016-09-05 デルファイ・インターナショナル・オペレーションズ・ルクセンブルク・エス・アー・エール・エル 高圧ポンプ
US20150176690A1 (en) * 2013-12-23 2015-06-25 Aktiebolaget Skf Cam follower roller device
US9752669B2 (en) * 2013-12-23 2017-09-05 Aktiebolaget Skf Cam follower roller device
JP2017527734A (ja) * 2014-09-15 2017-09-21 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング ピストンポンプ
US10487785B2 (en) 2015-04-28 2019-11-26 Cummins Inc. Pinless tappet in a common rail high pressure fuel pump
US10859050B2 (en) 2019-03-07 2020-12-08 Denso Corporation Fuel injection pump

Also Published As

Publication number Publication date
EP2652326A1 (fr) 2013-10-23
CN103261684A (zh) 2013-08-21
EP2652326B1 (fr) 2014-12-24
DE102010063363A1 (de) 2012-06-21
ES2527666T3 (es) 2015-01-28
CN103261684B (zh) 2016-05-11

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