EP1658433A1 - 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

Info

Publication number
EP1658433A1
EP1658433A1 EP04738752A EP04738752A EP1658433A1 EP 1658433 A1 EP1658433 A1 EP 1658433A1 EP 04738752 A EP04738752 A EP 04738752A EP 04738752 A EP04738752 A EP 04738752A EP 1658433 A1 EP1658433 A1 EP 1658433A1
Authority
EP
European Patent Office
Prior art keywords
ring
pressure pump
coating
pump
indirectly
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
EP04738752A
Other languages
German (de)
English (en)
Other versions
EP1658433B1 (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 - Lifetime 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
    • F04B1/053—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 relates to 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 known from DE 198 44 272 AI.
  • This high-pressure pump has a rotationally driven drive shaft which has a shaft section which is formed eccentrically to its axis of rotation.
  • a polygon ring is rotatably mounted on the eccentric shaft section.
  • the high-pressure pump has at least one pump element with a pump piston which is driven at least indirectly by the drive shaft via the ring in a stroke movement.
  • the circumference of the ring has flattenings corresponding to the number of pump elements, against which the pump pistons bear at least indirectly, for example via a tappet.
  • Operation of the high pressure pump leads to high loads on the ring and the pump pistons or tappets, in particular high surface pressures.
  • the high-pressure pump according to the invention with the features according to claim 1 has the advantage that a sufficient wear resistance of the contact area between the ring and at least indirectly the at least one pump piston is ensured by the lubricating coating of the ring.
  • the combination of a nitrocarbuxed surface layer and the coating of lubricating varnish applied to it enables particularly good wear resistance.
  • the coating of lubricating varnish represents a run-in aid, so that the microtopographies of the surfaces of the ring and at least indirectly of the pump piston can adapt to one another.
  • the pressure occurring during operation of the high pressure pump between the ring and at least indirectly the pump piston lubricating lacquer components are pressed into the coarse-pore pore hem of the nitrocarburized surface layer of the ring. This creates lubricant reservoirs made of lubricating varnish components, from which the high-pressure pump runs hot at high fuel temperatures
  • Solid lubricant particles are discharged, which prevents insufficient lubrication.
  • the high-pressure pump has a housing 10 which is formed in several parts and in which a drive shaft 12 is arranged.
  • the drive shaft 12 is rotatably mounted in the housing 10 via two bearing points 14 and 16 spaced apart from one another in the direction of the axis of rotation 13 of the drive shaft 12.
  • the bearing points 14, 16 can be arranged in different parts of the housing 10.
  • the drive shaft 12 has a shaft section 26 which is formed eccentrically to its axis of rotation 13 and on which a transmission element 28 in the form of a polygon ring is rotatably mounted via a bearing point 30.
  • the high-pressure pump has at least one, preferably a plurality of pump elements 32 arranged in the housing 10, each with a pump piston 34 which is driven by the polygon ring 28 in a stroke movement in at least approximately radial direction to the axis of rotation 13 of the drive shaft 12.
  • the pump piston 34 is in a cylinder bore 36 in the housing 10 or in a.
  • Insert in the housing 10 is guided in a tightly displaceable manner and delimits a pump working space 38 in the cylinder bore 36 with its end face remote from the transmission element 28.
  • a pump working space 38 At the mouth of the fuel inlet channel 40 in the pump work space 38 an inlet valve 42 opening into the pump work chamber 38 is arranged, which has a spring-loaded valve member 43.
  • the pump working space 38 also has a connection to an outlet via a fuel drain channel 44 running in the housing 10, said outlet being connected, for example, to an accumulator.
  • 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 executes a movement perpendicular to the axis of rotation 13 of the drive shaft 12, which causes the stroke of the pump piston 34.
  • the polygon ring 28 has in its outer jacket for each pump element 32 a flat 29 on which the piston foot 50 or the plunger 52 abuts.
  • the pump working chamber 38 is filled with fuel through the fuel inlet channel 40 with the inlet valve 42 open, the outlet valve 46 being closed.
  • fuel is conveyed by the pump piston 34 under high pressure through the fuel drain channel 44 to the reservoir 110 with the outlet valve 46 open, the inlet valve 42 being closed.
  • the polygon ring 28 is mounted directly on the bearing point 30, that is to say without a bearing bush, or via a bearing bush on the shaft section 26.
  • the polygon ring 28 can also be on its inner surface facing the shaft section 26 provided a coating 54 made of a lubricating varnish.
  • the shaft section 26 can also be provided with a coating 54 made of a lubricating varnish on its outer surface facing the polygon ring 28.
  • the coating 54 has a thickness between approximately 10 and 50 ⁇ m, preferably between approximately 15 and 30 ⁇ m.
  • the coating 54 consists of a lubricating varnish with the required properties with regard to the coefficient of friction, wear resistance and temperature resistance for use at the bearing point 30.
  • the coating 54 even when the bearing point 30 is lubricated, only results in low friction and low fuel due to the fuel present in the interior of the housing 10 sufficient wear resistance of the bearing point 30 ensured. Given a predetermined size of the outer cross section of the polygon ring 28, this can be made with a relatively large wall thickness because of the small thickness of the coating 54 and the small inner diameter that is possible as a result.
  • the polygon ring 28 is provided on its outer surface facing away from the shaft section 26, at least in the area of the flats 29, with a coating 56 made of a lubricating varnish. It can also be provided that the polygon ring 28 is provided with the coating 56 of lubricating varnish on its entire surface.
  • the coating 56 made of lubricating varnish has a thickness between approximately 10 and 50 ⁇ m, preferably between approximately 15 and 30 ⁇ m.
  • the lubricating varnish for the coating 56 is applied to the polygon ring 28 in liquid or powder-like form and then cured at elevated temperature.
  • the lubricating varnish consists at least essentially of a varnish 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 on have the entire surface of the nitrocarburized surface layer 58.
  • 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 approximately 5 to 20 ⁇ m, preferably approximately 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 an alloy 16MnCrS5.
  • the polygon ring 28 is tempered, is subsequently introduced into the salt bath, where the nitrocarburized surface layer 58 is produced, and finally the coating 56 made of lubricating varnish is applied to this surface layer 58 and cured.
  • the coating 56 made of lubricating varnish represents a run-in aid at the start 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 the piston foot 50 or the plunger 52 can mutually adapt.
  • the pressure occurring during operation of the high-pressure pump between the polygon ring 28 and the piston foot 50 or the plunger 52 represents a run-in aid at the start 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 the piston foot 50 or the plunger 52 can mutually adapt.
  • Lubricant varnish components pressed into the coarse-pore pore hem, that is the outer area of the nitrocarburized surface layer 58, of the polygon ring 28. This creates lubricant reservoirs made of lubricating varnish constituents, from which the high-pressure pump runs hot at high fuel temperatures
  • Solid lubricant particles are discharged, which prevents insufficient lubrication between the polygon ring 28 and the piston foot 50 or the plunger 52.

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)

Abstract

L'invention concerne une pompe haute pression comprenant un arbre de commande (12) entraîné en rotation, présentant un tronçon d'arbre (26) configuré excentrique par rapport à son axe de rotation (13), sur lequel une bague (28) est montée tournante. La pompe haute pression comprend au moins un élément de pompe (32) présentant un piston (34) s'appliquant au moins indirectement sur la bague (28), entraîné suivant une course déterminée, par l'arbre de commande (12), au moins indirectement via la bague (28). La bague (28) est, au moins sur sa face externe opposée au tronçon d'arbre (26), munie d'un revêtement (56) formé d'une laque anti-friction, au moins dans une zone (29) dans laquelle au moins un piston de pompe (34) s'applique, au moins indirectement, sur la bague (28).
EP04738752A 2003-08-21 2004-06-22 Pompe haute pression pour dispositif d'injection de carburant d'un moteur a combustion interne Expired - Lifetime 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 true EP1658433A1 (fr) 2006-05-24
EP1658433B1 EP1658433B1 (fr) 2008-03-26

Family

ID=33547282

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04738752A Expired - Lifetime 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)

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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
DE112014006325T5 (de) 2014-02-03 2017-03-23 Cummins Inc. Nockenwellendrucksteuerung gesichert durch Antriebszahnrad
EP3797219B1 (fr) * 2018-05-23 2026-04-08 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

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Also Published As

Publication number Publication date
KR20060067961A (ko) 2006-06-20
RU2347100C2 (ru) 2009-02-20
CN1839260A (zh) 2006-09-27
US20060280620A1 (en) 2006-12-14
JP2006514722A (ja) 2006-05-11
KR101018957B1 (ko) 2011-03-02
US7284537B2 (en) 2007-10-23
DE502004006679D1 (de) 2008-05-08
DE20313014U1 (de) 2004-12-23
CN100523494C (zh) 2009-08-05
EP1658433B1 (fr) 2008-03-26
RU2005120649A (ru) 2007-09-27
WO2005026541A1 (fr) 2005-03-24

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