EP1658433B1 - Pompe haute pression pour dispositif d'injection de carburant d'un moteur a combustion interne - Google Patents

Pompe haute pression pour dispositif d'injection de carburant d'un moteur a combustion interne Download PDF

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Publication number
EP1658433B1
EP1658433B1 EP04738752A EP04738752A EP1658433B1 EP 1658433 B1 EP1658433 B1 EP 1658433B1 EP 04738752 A EP04738752 A EP 04738752A EP 04738752 A EP04738752 A EP 04738752A EP 1658433 B1 EP1658433 B1 EP 1658433B1
Authority
EP
European Patent Office
Prior art keywords
ring
pressure pump
coating
pump
fuel
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 - Fee Related
Application number
EP04738752A
Other languages
German (de)
English (en)
Other versions
EP1658433A1 (fr
Inventor
Thomas Kleinbeck
Markus Koch
Wolfram Rittmannsberger
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 EP1658433A1 publication Critical patent/EP1658433A1/fr
Application granted granted Critical
Publication of EP1658433B1 publication Critical patent/EP1658433B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F04B1/053—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
    • 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
    • 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
    • F04B53/02—Packing the free space between cylinders and 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
    • 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
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/11—Kind or type liquid, i.e. incompressible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/90—Coating; Surface treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2280/00—Materials; Properties thereof
    • F05B2280/10—Inorganic materials, e.g. metals
    • F05B2280/107—Alloys
    • 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
    • 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
    • Y10S417/00—Pumps

Definitions

  • the invention is based on a high-pressure pump for a fuel injection device of an internal combustion engine according to the preamble of claim 1.
  • Such a high-pressure pump is through the DE 198 44 272 A1 known.
  • This high-pressure pump has a rotationally driven drive shaft, which has an eccentric to its axis of rotation formed shaft portion. On the eccentric shaft portion a polygon ring is rotatably mounted.
  • the high-pressure pump has at least one pump element with a pump piston driven at least indirectly by the drive shaft via the ring in a lifting movement.
  • the ring has on its circumference corresponding to the number of pump elements on flats on which the pump piston at least indirectly, for example via a plunger abut.
  • a high-pressure pump which has a rotationally driven drive shaft with an eccentric to its axis of rotation shaft portion on which a ring is rotatably mounted.
  • the high-pressure pump has at least one pump element which has a pump piston driven at least indirectly by the drive shaft via the ring in a stroke movement.
  • the ring is generally hardened to improve the wear resistance.
  • the sliding properties between the ring and the pump piston supporting it are not improved by the hardening of the ring.
  • the high pressure pump according to the invention with the features of claim 1 has the advantage that the sliding properties of the ring sliding properties are improved and sufficient wear resistance of the contact area between the ring and at least indirectly the at least one pump piston is ensured.
  • FIG. 1 a fuel injection device of an internal combustion engine with a high-pressure pump and FIG. 2 the high pressure pump in a cross section along line II-II in FIG. 1 ,
  • FIGS. 1 and 2 a high pressure pump for a fuel injector of an internal combustion engine is shown.
  • the high-pressure pump has a housing 10, which is designed in several parts and in which a drive shaft 12 is arranged.
  • the drive shaft 12 is rotatably supported in the housing 10 via two spaced apart in the direction of the axis of rotation 13 of the drive shaft 12 bearings 14 and 16.
  • the bearings 14,16 can be arranged in different parts of the housing 10.
  • the drive shaft 12 has an eccentric to its axis of rotation 13 formed shaft portion 26 on which a transmission element 28 is rotatably mounted via a bearing 30 in the form of a polygon ring.
  • the high-pressure pump has at least one, preferably a plurality of pump elements 32 arranged in the housing 10, each having a pump piston 34 which is driven by the polygon ring 28 in a lifting movement in at least approximately radial direction to the axis of rotation 13 of the drive shaft 12.
  • the pump piston 34 is guided in a cylinder bore 36 in the housing 10 or an insert in the housing 10 and slidably limited with its the transmission element 28 facing away from the end face in the cylinder bore 36 a pump working chamber 38.
  • the pump chamber 38 has a running in the housing 10 fuel inlet channel 40 a Connection with a fuel inlet, such as a feed pump.
  • a fuel inlet such as a feed pump.
  • an inlet valve 42 opening into the pump working space 38 is arranged, which has a spring-loaded valve member 43.
  • the pump working chamber 38 also has, via a fuel drain passage 44 running in the housing 10, a connection to an outlet, which is connected, for example, to a reservoir.
  • an outlet valve 46 which opens out of the pump working chamber 38 is arranged, which likewise has a spring-loaded valve member 47.
  • the pump piston 34 is held by a prestressed spring 48 with its piston foot 50 directly or via a plunger 52 in contact with the polygon ring 28.
  • the polygon ring 28 has in its outer jacket for each pump element 32 a flattening 29, against which the piston foot 50 or the plunger 52 is applied.
  • the polygon ring 28 is mounted on the Lager scholar 30 directly, that is without a bushing, or on a bearing bushing on the shaft portion 26.
  • the polygon ring 28 may on its the shaft portion 26 facing inner surface with a coating 54 made of a lubricating varnish.
  • the shaft section 26 may be provided on its outer surface facing the polygon ring 28 with a coating 54 of a bonded coating.
  • the coating 54 has a thickness between about 10 and 50 microns, preferably between about 15 and 30 microns.
  • the coating 54 consists of a bonded coating with the required properties in terms of coefficient of friction, wear resistance and temperature resistance for use at the bearing 30.
  • the coating 54 is even with lubrication of the bearing 30 only by the present in the interior of the housing 10 fuel low friction and a sufficient wear resistance of the bearing 30 ensured.
  • this can be performed with a relatively large wall thickness because of the small thickness of the coating 54 and the thus possible small inner diameter.
  • the polygon ring 28 is provided on its side facing away from the shaft portion 26 outer surface at least in the region of the flats 29 with a coating 56 of a bonded coating. It can also be provided that the polygon ring 28 is provided on its entire surface with the coating 56 of lubricating varnish.
  • the coating 56 of anti-friction varnish has a thickness of between about 10 and 50 ⁇ m, preferably between about 15 and 30 ⁇ m.
  • the bonded coating for the coating 56 is applied in liquid or powder form to the polygon ring 28 and then cured at elevated temperature.
  • the bonded coating consists at least substantially of a paint with embedded particles of solid lubricant.
  • the polygon ring 28 is preferably provided with a nitrocarburized surface layer 58 at least in the region of the flats 29.
  • the ring 28 can also open have the nitrocarburized surface layer 58 over its entire surface.
  • This surface layer 58 is produced by introducing the polygon ring 28 into a salt bath.
  • the nitrocarburized surface layer 58 has a thickness of about 5 to 20 ⁇ m, preferably about 10 ⁇ m.
  • the surface layer 58 has an outer area with pores and an inner, non-porous area, with a thickness of at least 5 ⁇ m.
  • the polygon ring 28 is made of steel, preferably of a 16MnCrS5 alloy.
  • the polygon ring 28 is tempered, then introduced into the salt bath where the nitrocarburized surface layer 58 is formed, and finally the coating 56 of lubricating varnish is applied to this surface layer 58 and cured.
  • the coating 56 of anti-friction varnish constitutes an enema aid at the beginning of the operation of the high-pressure pump, so that the microtopographies of the abutting surfaces of the flats 29 of the polygon ring 28 and of the piston foot 50 or the tappet 52 can mutually adapt.
  • Gleitlack by the pressure occurring in operation of the high-pressure pump between the polygon ring 28 and the piston base 50 and the plunger 52 Gleitlack surelyer in the coarsely porous pore space, that is the outer region of the nitrocarburized surface layer 58, the polygon ring 28 is pressed.
  • lubricant reservoirs of Gleitlack ensure that from which during high-pressure pump running at high fuel temperatures continuously solid lubricant particles are discharged through which a lack of lubrication between the polygon ring 28 and the piston 50 and the plunger 52 is prevented.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)

Claims (6)

  1. Pompe haute pression pour une installation d'injection de carburant d'un moteur à combustion interne comportant un arbre (12) d'entraînement en rotation, ayant un segment d'arbre (26) excentré par rapport à son axe de rotation (13), et portant en rotation un anneau (28) et ayant au moins un élément de pompe (32) comportant un piston de pompe (34) entraîné dans son mouvement de translation au moins indirectement à partir de l'arbre d'entraînement (12) par l'intermédiaire de l'anneau (28), ce piston s'appliquant au moins indirectement contre l'anneau (28),
    caractérisée en ce que
    l'anneau (28) s'applique au moins par sa surface extérieure opposée au segment d'arbre (28), au moins dans une zone dans laquelle au moins ce piston de pompe (34) est appliqué au moins indirectement contre l'anneau (28), en étant muni d'un revêtement (56) en un vernis lisse, qui se compose au moins principalement d'un vernis intégrant des particules solides d'agent lubrifiant.
  2. Pompe haute pression selon la revendication 1,
    caractérisée en ce que
    l'anneau (28) présente à sa périphérie au moins un aplat (29) contre lequel s'appuie au moins indirectement le piston de pompe (34) et cet aplat est muni d'un revêtement (56) en vernis lisse.
  3. Pompe haute pression selon la revendication 1 ou 2,
    caractérisée en ce qu'
    au moins dans la zone dans laquelle le revêtement (56) en vernis lisse est appliqué, l'anneau (28) présente une couche de surface supérieure (58) nitrocarburée, recevant le revêtement (56) en vernis lisse.
  4. Pompe haute pression selon la revendication 3,
    caractérisée en ce que
    la surface supérieure nitrocarburée (58) a une épaisseur de l'ordre de 5 à 20 µm, et de préférence d'environ 10 µm.
  5. Pompe à haute pression selon les revendications 1 à 4,
    caractérisée en ce que
    le revêtement (56) est en un vernis lisse d'une épaisseur de l'ordre de 10 à 50 µm et de préférence d'environ 15 à 30 µm.
  6. Pompe à haute pression selon l'une des revendications précédentes,
    caractérisée en ce que
    l'anneau (28) est en un alliage 16MnCrS5.
EP04738752A 2003-08-21 2004-06-22 Pompe haute pression pour dispositif d'injection de carburant d'un moteur a combustion interne Expired - Fee Related EP1658433B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20313014U DE20313014U1 (de) 2003-08-21 2003-08-21 Hochdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine
PCT/DE2004/001303 WO2005026541A1 (fr) 2003-08-21 2004-06-22 Pompe haute pression pour dispositif d'injection de carburant d'un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1658433A1 EP1658433A1 (fr) 2006-05-24
EP1658433B1 true EP1658433B1 (fr) 2008-03-26

Family

ID=33547282

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04738752A Expired - Fee Related EP1658433B1 (fr) 2003-08-21 2004-06-22 Pompe haute pression pour dispositif d'injection de carburant d'un moteur a combustion interne

Country Status (8)

Country Link
US (1) US7284537B2 (fr)
EP (1) EP1658433B1 (fr)
JP (1) JP2006514722A (fr)
KR (1) KR101018957B1 (fr)
CN (1) CN100523494C (fr)
DE (2) DE20313014U1 (fr)
RU (1) RU2347100C2 (fr)
WO (1) WO2005026541A1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005035082A1 (de) * 2005-07-21 2007-02-01 Ks Gleitlager Gmbh Hubring für eine Einspritzpumpe
DE102006034768A1 (de) * 2006-07-27 2008-01-31 Siemens Ag Radialkolbenpumpeneinheit zur Kraftstoff-Hochdruckversorgung bei Kraftstoff-Einspritzsystemen
US8122811B2 (en) * 2007-11-12 2012-02-28 Denso Corporation Fuel injection pump and method for assembling the same
DE102007060772A1 (de) * 2007-12-17 2009-06-18 Robert Bosch Gmbh Pumpe, insbesondere Kraftstoffhochdruckpumpe
JP4941337B2 (ja) * 2008-02-01 2012-05-30 株式会社デンソー 燃料供給ポンプ
DE102008000824A1 (de) * 2008-03-26 2009-10-01 Robert Bosch Gmbh Pumpe, insbesondere Kraftstoffhochdruckpumpe
IT1392791B1 (it) * 2008-07-17 2012-03-23 Bosch Gmbh Robert Pompa di alta pressione per alimentare combustibile ad un motore a combustione interna
ITMI20081470A1 (it) * 2008-08-05 2010-02-06 Bosch Gmbh Robert Pompa di alta pressione per alimentare combustibile a un motore a combustione interna
DE102008041751A1 (de) * 2008-09-02 2010-03-04 Robert Bosch Gmbh Hochdruck-Radialkolbenpumpe
DE102008043993B3 (de) * 2008-11-21 2010-04-29 Thielert Aircraft Engines Gmbh Common-Rail-Hochdruckpumpe
DE102010020578A1 (de) * 2010-05-14 2011-11-17 Bayerische Motoren Werke Aktiengesellschaft Vorrichtung zum Antrieb eines Nebenaggregates
JP5633387B2 (ja) * 2011-01-24 2014-12-03 株式会社デンソー 燃料供給ポンプ
DE102013210036A1 (de) * 2013-05-29 2014-12-04 Robert Bosch Gmbh Hochdruckpumpe für ein Kraftstoffeinspritzsystem
CN103470416B (zh) * 2013-09-26 2016-08-17 南岳电控（衡阳）工业技术股份有限公司 一种应用于高压共轨燃油喷射系统的径向柱塞供油泵
US10487810B2 (en) 2014-02-03 2019-11-26 Cummins Inc. Camshaft thrust control secured by drive gear
WO2019224787A2 (fr) * 2018-05-23 2019-11-28 Cummins Inc. Système et procédé associés à un pignon captif dans un moteur
KR102610182B1 (ko) * 2023-06-28 2023-12-06 한일마이크로텍(주) 석탄 분쇄장치용 레이디얼 피스톤 펌프

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5642988A (en) * 1991-02-15 1997-07-01 Ina Walzlager Schaeffler Kg Radial piston pump
JPH06280740A (ja) * 1993-03-26 1994-10-04 Zexel Corp 低粘性燃料油用ラジアルピストンポンプ
US5462362A (en) * 1993-04-30 1995-10-31 Nsk Ltd. Wear resisting slide member
DE19635164A1 (de) * 1996-08-30 1998-03-05 Bosch Gmbh Robert Kolbenpumpe
EP0984161A4 (fr) 1998-03-19 2006-01-25 Sumitomo Electric Industries Combinaison de cale et de came
JP2000257555A (ja) 1999-03-08 2000-09-19 Toyota Autom Loom Works Ltd 圧縮機
JP3337071B2 (ja) 1999-11-26 2002-10-21 大豊工業株式会社 半球状シュー
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
DE10212492B4 (de) * 2002-03-21 2012-02-02 Daimler Ag Kolbenpumpe
DE10256528A1 (de) * 2002-12-04 2004-06-24 Robert Bosch Gmbh Hochdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine

Also Published As

Publication number Publication date
KR101018957B1 (ko) 2011-03-02
CN1839260A (zh) 2006-09-27
KR20060067961A (ko) 2006-06-20
US7284537B2 (en) 2007-10-23
JP2006514722A (ja) 2006-05-11
US20060280620A1 (en) 2006-12-14
DE20313014U1 (de) 2004-12-23
CN100523494C (zh) 2009-08-05
EP1658433A1 (fr) 2006-05-24
DE502004006679D1 (de) 2008-05-08
RU2347100C2 (ru) 2009-02-20
RU2005120649A (ru) 2007-09-27
WO2005026541A1 (fr) 2005-03-24

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