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EP2359002A1 - Pompe à haute pression à rampe commune - Google Patents

Pompe à haute pression à rampe commune

Info

Publication number
EP2359002A1
EP2359002A1 EP09771726A EP09771726A EP2359002A1 EP 2359002 A1 EP2359002 A1 EP 2359002A1 EP 09771726 A EP09771726 A EP 09771726A EP 09771726 A EP09771726 A EP 09771726A EP 2359002 A1 EP2359002 A1 EP 2359002A1
Authority
EP
European Patent Office
Prior art keywords
pressure pump
pump
eccentric ring
hardness
eccentric
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.)
Withdrawn
Application number
EP09771726A
Other languages
German (de)
English (en)
Inventor
Carsten Rudolph
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.)
Technify Motors GmbH
Original Assignee
Thielert Aircraft Engines Vertr D D Insolvenzverwalter Dr Bruno M Kuebler 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 Thielert Aircraft Engines Vertr D D Insolvenzverwalter Dr Bruno M Kuebler GmbH filed Critical Thielert Aircraft Engines Vertr D D Insolvenzverwalter Dr Bruno M Kuebler GmbH
Publication of EP2359002A1 publication Critical patent/EP2359002A1/fr
Withdrawn legal-status Critical Current

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
    • F04B1/0413—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
    • F02M59/02—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
    • F02M59/44—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
    • F02M59/445—Selection of particular materials
    • 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
    • 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
    • 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
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9038—Coatings
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals
    • F02M2200/9061—Special treatments for modifying the properties of metals used for fuel injection apparatus, e.g. modifying mechanical or electromagnetic properties
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9092—Sintered materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2203/00—Non-metallic inorganic materials
    • F05C2203/08—Ceramics; Oxides
    • F05C2203/0804—Non-oxide ceramics
    • F05C2203/0808—Carbon, e.g. graphite
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2251/00—Material properties
    • F05C2251/10—Hardness
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2253/00—Other material characteristics; Treatment of material
    • F05C2253/12—Coating

Definitions

  • the invention relates to a common rail high-pressure pump for an aircraft engine powered by aircraft fuel, which arranged in a housing, shaped as a polygon and driven by an eccentric shaft eccentric ring and the contact surfaces of a tappet plate in pump cylinders movable, with a footprint the plunger plate operatively connected pump piston comprises.
  • a known common rail high pressure pump for diesel fueled diesel engines includes one of the diesel engine via a diesel engine
  • Eccentric driven designed as a triangular polygon eccentric whose treads each have a - acting as a base plate - ram with a pump piston in operative connection and cause the piston movement in a pump cylinder against the pressure of a helical compression spring.
  • the eccentric shaft is located in a pump housing, in which the fuel is introduced from a prefeed pump. During the downward movement of the respective piston caused by the helical compression spring, the fuel is sucked into the respective cylinder and compressed during the upward movement and ejected into the distributor tube.
  • the lubrication of the eccentric shaft bearings, the friction surfaces between plunger and eccentric ring and between plunger and piston and the running surfaces between the pistons and cylinders takes place with the diesel engines known to be used in diesel engines. fuel.
  • the running surfaces on the eccentric ring are subjected to a considerable load at the points where the foot disks (plunger plates) of the pistons reciprocate. These treads are therefore formed with a wear protection layer.
  • a high-pressure pump for the fuel injection device of an internal combustion engine described in DE 102 56 525 A1 comprises an eccentric ring for moving the pump pistons via support elements which slide on flattened surfaces coated with amorphous carbon.
  • the invention has for its object to provide a high pressure pump for operated according to the common rail principle diesel engines, which has a long life even when using aircraft fuel.
  • the object is achieved with a trained according to the features of claim high pressure pump.
  • Advantageous embodiments of the invention are the subject of the dependent claims.
  • the core of the invention is that in a common-rail high-pressure pump for an aircraft engine with an aircraft engine, which arranged in a pump housing, designed as a polygon and driven by a Exzen- terwelle eccentric and its
  • the eccentric ring consists of a highly tempered steel with a specific
  • edge hardness of the eccentric ring is produced by gas nitriding and not less than 800HV.
  • the plunger platelets consist of a powder-metallurgical, through-hardened high-tensile steel with high toughness and design strength, the hardness of the tappet plate does not fall below 800 HVlO.
  • FIG. 1 sectional view of a portion of a high-pressure pump in the region of the essential friction partners
  • Fig. 2 is a plan view of the eccentric ring
  • Fig. 3 is a side view of the plunger plate.
  • Fig. 1 shows a partial view of a high-pressure pump in the field of power transmission from an eccentric shaft 1 via a trained as a polygon eccentric ring 2 on a plunger plate 3.
  • the plunger plate 3 is moved in accordance with the eccentric rotational movement of the eccentric shaft 1 alternately radially outward and then back inward.
  • the running surface 4 of the eccentric ring 2 (see Fig. 2) performs a reciprocating movement along the contact surface 5 of the tappet plate 3.
  • the one end of a pump piston 8 which can be moved radially to and fro in a pump cylinder 7 is arranged.
  • the end face 9 of the pump piston 8 contacts the contact surface 10 in the receiving bore 6, so that the pump piston 8 is moved against the force of a helical compression spring 11 radially outward and by the spring force back inside.
  • the eccentric ring 2 has three at an angle of 120 ° to each other arranged running surfaces 4, each with a plunger plate 3 with a pump piston 8 in Active compound stand.
  • the pump housing of the high-pressure pump is designated by the reference numeral 13.
  • the running surfaces 4 and the contact surfaces 5 are provided with a thin diamond-like carbon layer 12 (DLC: diamond like carbonite) coated.
  • the eccentric ring 2 consists of a high-tempered steel with a high basic strength and core hardness and a certain - preferably achieved by gas nitriding - edge hardness.
  • the ram plates 3 are made of a powder metallurgically produced and through-hardened high-speed steel.
  • the base material of the eccentric ring 2 and the tappet plate 3 is made ground in the area of the running surfaces 4 and the contact surface 5 of the respective tappet plate 3.
  • the contact surface 10 of the tappet plate 3 is not provided with the diamond-like acting carbon layer (DLC layer). However, it is concave in the order of about 3 to 8 .mu.m designed to reduce the pressure of the pump piston 8 on the plunger plate 3 and thus the surface pressure between the tread 4 and the contact surface 5 and beyond a punching through the receiving bore 6 due to the the end face 9 of the pump piston 8 outgoing force to prevent.
  • DLC layer diamond-like acting carbon layer

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 une pompe à haute pression à rampe commune pour moteurs diesel fonctionnant avec du carburant d'aviation, qui comprend une bague excentrique (2) de forme polygonale, disposée dans un carter de pompe (13) et entraînée par un arbre à excentrique (1), ainsi qu'un piston de pompe (8) pouvant être déplacé sur les surfaces de course (4) de ladite bague et sur la surface de contact (5) d'une plaquette à poussoir (3) dans des cylindres de pompe (7) et se trouvant en liaison fonctionnelle avec une surface d'appui (10) de la plaquette à poussoir. Une mince couche de carbone adamantin (12) est appliquée sur les surfaces de contact (5) et sur les surfaces de course (4) préalablement polies, tandis que la surface d'appui (10) non revêtue présente une courbure concave. La bague excentrique (2) et la plaquette à poussoir (3) présentent une dureté élévée prédéterminée. En raison de l'effet synergique provoqué par la dureté et le revêtement du matériau ainsi que par la concavité de la surface d'appui, les forces de frottement diminuent très nettement et la durée de fonctionnement de la pompe à haute pression fonctionnant avec du carburant d'aviation augmente très nettement.
EP09771726A 2008-11-21 2009-11-17 Pompe à haute pression à rampe commune Withdrawn EP2359002A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008043993A DE102008043993B3 (de) 2008-11-21 2008-11-21 Common-Rail-Hochdruckpumpe
PCT/EP2009/065330 WO2010057889A1 (fr) 2008-11-21 2009-11-17 Pompe à haute pression à rampe commune

Publications (1)

Publication Number Publication Date
EP2359002A1 true EP2359002A1 (fr) 2011-08-24

Family

ID=41682433

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09771726A Withdrawn EP2359002A1 (fr) 2008-11-21 2009-11-17 Pompe à haute pression à rampe commune

Country Status (6)

Country Link
US (1) US20110220065A1 (fr)
EP (1) EP2359002A1 (fr)
CN (1) CN102239331A (fr)
CA (1) CA2744293A1 (fr)
DE (1) DE102008043993B3 (fr)
WO (1) WO2010057889A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201012634D0 (en) * 2010-07-28 2010-09-15 Delphi Technologies Holding Intermediate drive assembly
FR3011045B1 (fr) * 2013-09-25 2015-10-30 Vianney Rabhi Bague d'etancheite pour distributeur de pompe hydraulique

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE58903407D1 (de) * 1989-01-19 1993-03-11 Sulzer Ag Hubkolbenkompressor.
DE19705205A1 (de) * 1997-02-12 1998-08-13 Bosch Gmbh Robert Kolbenpumpe
DE19756580A1 (de) * 1997-06-21 1998-12-24 Samsung Heavy Ind Motorstössel mit hoher Verschleißfestigkeit und Verfahren zum Herstellen desselben
DE19729789A1 (de) * 1997-07-11 1999-01-14 Bosch Gmbh Robert Radialkolbenpumpe zur Kraftstoffhochdruckversorgung
DE19814506A1 (de) * 1998-04-01 1999-10-14 Bosch Gmbh Robert Radialkolbenpumpe zur Kraftstoffhochdruckversorgung
JP2003148294A (ja) * 2001-11-12 2003-05-21 Hitachi Ltd 燃料ポンプ及び筒内噴射エンジン
JP2006504904A (ja) * 2002-10-31 2006-02-09 ローベルト　ボツシユ　ゲゼルシヤフト　ミツト　ベシユレンクテル　ハフツング 低圧入口に玉型弁を備えた燃料高圧ポンプ
DE10256525A1 (de) * 2002-12-04 2004-06-24 Robert Bosch Gmbh Hochdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine
US20040258547A1 (en) * 2003-04-02 2004-12-23 Kurt Burger Pump piston and/or elements sealing the pump piston, in particular a sealing ring of elastomeric material, and a device and method for coating an object of elastomeric material
DE10326880A1 (de) * 2003-06-14 2004-12-30 Daimlerchrysler Ag Radialkolbenpumpe zur Kraftstoffhochdruckerzeugung bei Kraftstoffeinspritzsystemen von Brennkraftmaschinen
DE20313014U1 (de) * 2003-08-21 2004-12-23 Robert Bosch Gmbh Hochdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine
US7134846B2 (en) * 2004-05-28 2006-11-14 Stanadyne Corporation Radial piston pump with eccentrically driven rolling actuation ring
JP4541941B2 (ja) * 2005-03-16 2010-09-08 川崎重工業株式会社 チタン合金製タペット等の部品とその製造方法
DE102005014015B4 (de) * 2005-03-26 2007-04-05 Audi Ag Kolbenpumpe für ein insbesondere hydraulisches Drucksystem eines Kraftfahrzeugs
DE102006041673A1 (de) * 2006-02-20 2007-08-23 Robert Bosch Gmbh Hochdruckpumpe, insbesondere für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine
US7658173B2 (en) * 2006-10-31 2010-02-09 Lycoming Engines, A Division Of Avco Corporation Tappet for an internal combustion engine

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2010057889A1 *

Also Published As

Publication number Publication date
WO2010057889A1 (fr) 2010-05-27
CA2744293A1 (fr) 2010-05-27
US20110220065A1 (en) 2011-09-15
DE102008043993B3 (de) 2010-04-29
CN102239331A (zh) 2011-11-09

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