EP2201239B1 - Kraftstoffpumpe, insbesondere für ein kraftstoffsystem einer kolben-brennkraftmaschine - Google Patents

Kraftstoffpumpe, insbesondere für ein kraftstoffsystem einer kolben-brennkraftmaschine Download PDF

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Publication number
EP2201239B1
EP2201239B1 EP08803453.3A EP08803453A EP2201239B1 EP 2201239 B1 EP2201239 B1 EP 2201239B1 EP 08803453 A EP08803453 A EP 08803453A EP 2201239 B1 EP2201239 B1 EP 2201239B1
Authority
EP
European Patent Office
Prior art keywords
housing
region
fuel pump
coating
thermoplastic material
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.)
Not-in-force
Application number
EP08803453.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2201239A1 (de
Inventor
Christian Langenbach
Manfred Fink
Armin Merz
Josef Guentert
Jan Grebe
Robert Reitsam
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 EP2201239A1 publication Critical patent/EP2201239A1/de
Application granted granted Critical
Publication of EP2201239B1 publication Critical patent/EP2201239B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/041—Arrangements for driving gear-type pumps
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/045—Arrangements for driving rotary positive-displacement pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/90—Improving properties of machine parts
    • F04C2230/91—Coating
    • 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
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium
    • 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
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/08—Thermoplastics
    • 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
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/12—Polyetheretherketones, e.g. PEEK
    • 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
    • F05C2253/22—Reinforcements

Definitions

  • the invention relates to a fuel pump, in particular for a fuel system of a piston internal combustion engine, according to the preamble of claim 1.
  • Such a pump is through the US 4,781,552 A known. and discloses the preamble of claim 1.
  • This pump has a housing and within the housing two gears are arranged, which abut at least indirectly on a housing portion and which rotate during operation.
  • In the housing plates are arranged on both sides of the gears, against which the gears and which consist of thermoplastic material.
  • the thermoplastic material may contain metal powder to improve the thermal conductivity. Due to the massive plates, the pump requires a large amount of space and is expensive to manufacture. In addition, it must be ensured that the thermoplastic material has sufficient wear resistance.
  • the fuel pump according to the invention with the features of claim 1 has the advantage that it can be made easily and compact in size and that the coating of thermoplastic material has sufficient wear resistance.
  • a region of the coating is designed as a sealing region which cooperates with another region of the housing.
  • the plastic coating provided according to the invention fulfills a double function in such a case: In addition to the wear-reducing function, it also fulfills a sealing function.
  • a separate seal, for example by an O-ring, including the associated machining as a result of introducing corresponding O-ring grooves is not required. This also simplifies the design, facilitates assembly, reduces sources of error, etc.
  • the sealing region may comprise a peripheral sealing bead or a circumferential sealing lip.
  • Such embodiments are easy to produce with conventional plastics, in particular with thermoplastics, and ensure reliable sealing even of high pressure differences.
  • a simple production of the coating made of plastic may consist in that the coating is melted onto the housing area.
  • the housing region, to which the coating is applied comprises a comparatively thin carrier sheet, which is fastened to another housing region, preferably glued thereto. This allows for specific applications, depending on the sometimes complex geometry of the housing area and / or the area to be sealed, an individual and reliable implementation of the construction.
  • FIG. 1 It includes a fuel tank 12 from which a high-pressure fuel pump 14 delivers the fuel into a high-pressure fuel reservoir 16 ("rail"). To the rail 16, a plurality of injectors 18 are connected, which inject the fuel directly into them associated combustion chambers (not shown) of the internal combustion engine.
  • the high-pressure fuel pump 14 includes a gear pump 15 on the low-pressure side.
  • the high-pressure fuel pump may also include a vane pump or any other suitable type of pump on the low-pressure side.
  • the fuel high pressure pump 14 including the low pressure side gear pump 15 is directly and mechanically driven by the engine.
  • the low-pressure side gear pump may also have a separate drive, such as an electric motor.
  • FIG. 2 a portion of the gear pump 15 of the high-pressure fuel pump 14 is shown, but in a state in which a housing cover existing in normal operation is removed.
  • a housing 20 manufactured as a casting, which is machined at various locations and which contains the mechanical and fluidic components of the high-pressure fuel pump 14.
  • the housing 20 is made of aluminum.
  • a housing portion 22 is machined as a flat surface.
  • the housing portion 22 serves as a running surface for two gears 24 and 26, which during operation of the high-pressure fuel pump 14th and the gear pump 15 rotate in opposite directions.
  • the gears 24 and 26 are thus parts which move during operation and at least indirectly abut against the flat housing region 22.
  • FIG. 3 shows, on the housing portion 22, a coating of a plastic, namely applied from a thermoplastic.
  • This coating is in FIG. 2
  • the coating 28 is applied to the housing portion 22 on its side facing the two gears 24 and 26 side, the two gears 24 and 26 are thus applied to the coating 28.
  • a polyetheretherketone is used as the material for the coating 28.
  • the coating 28 is melted onto the housing region 22.
  • the coating is additionally reinforced by fibers, in particular carbon fibers.
  • the coating 28 outside the running surface of the two gears 24 and 26 has a circumferential sealing bead 30 which forms a sealing region which cooperates with a cover 32 designed as another area of the housing 20.
  • the cover 32 is screwed to the housing portion 22, which is compressed during assembly of the sealing bead 30 and thereby the area located radially inwardly of the sealing bead 30 is sealed to the outside.
  • FIG. 4 An alternative embodiment is in FIG. 4 shown. In doing so, those elements and regions which have equivalent functions to elements and regions which have already been described bear the same reference numerals. They will not be discussed again in detail.
  • the housing region 22, on which the coating 28 is applied comprises a comparatively thin carrier sheet 34, which is glued to a residual housing 36 of the high-pressure fuel pump 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Rotary Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP08803453.3A 2007-09-18 2008-09-01 Kraftstoffpumpe, insbesondere für ein kraftstoffsystem einer kolben-brennkraftmaschine Not-in-force EP2201239B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007044499A DE102007044499A1 (de) 2007-09-18 2007-09-18 Kraftstoffpumpe, insbesondere für ein Kraftstoffsystem einer Kolben-Brennkraftmaschine
PCT/EP2008/061470 WO2009037100A1 (de) 2007-09-18 2008-09-01 Kraftstoffpumpe, insbesondere für ein kraftstoffsystem einer kolben-brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP2201239A1 EP2201239A1 (de) 2010-06-30
EP2201239B1 true EP2201239B1 (de) 2017-04-12

Family

ID=40084320

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08803453.3A Not-in-force EP2201239B1 (de) 2007-09-18 2008-09-01 Kraftstoffpumpe, insbesondere für ein kraftstoffsystem einer kolben-brennkraftmaschine

Country Status (8)

Country Link
US (1) US8261719B2 (ja)
EP (1) EP2201239B1 (ja)
JP (1) JP5232237B2 (ja)
KR (1) KR20100058564A (ja)
CN (1) CN101802386B (ja)
DE (1) DE102007044499A1 (ja)
RU (1) RU2492348C2 (ja)
WO (1) WO2009037100A1 (ja)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008042075A1 (de) * 2008-09-15 2010-03-18 Robert Bosch Gmbh Vorrichtung zur Kraftstoffversorgung einer Verbrennungskraftmaschine
IT1396955B1 (it) * 2009-12-18 2012-12-20 Bosch Gmbh Robert Impianto di alimentazione di carburante ad un motore a combustione interna
DE102010001121A1 (de) * 2010-01-22 2011-07-28 Robert Bosch GmbH, 70469 Kraftstoffeinspritzsystem und Verfahren zum Steuern einer Kraftstoffpumpe
DE102010041213A1 (de) * 2010-09-22 2012-03-22 Robert Bosch Gmbh Hochdruckpumpe und Verfahren zum Herstellen eines Pumpengehäuses
DE102010041425A1 (de) * 2010-09-27 2012-03-29 Robert Bosch Gmbh Kraftstoffhochdruckpumpe
EP3065743B1 (en) 2013-11-07 2019-05-29 SpecGx LLC Production of 6-hydroxy morphinans without the isolation of intermediates
GB2552328A (en) * 2016-07-18 2018-01-24 Delphi Int Operations Luxembourg Sarl Transfer pump
CN111173738A (zh) * 2018-11-12 2020-05-19 罗伯特·博世有限公司 叶片泵及包括叶片泵的燃料喷射系统

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Also Published As

Publication number Publication date
DE102007044499A1 (de) 2009-03-19
US8261719B2 (en) 2012-09-11
KR20100058564A (ko) 2010-06-03
RU2492348C2 (ru) 2013-09-10
CN101802386B (zh) 2015-05-06
JP5232237B2 (ja) 2013-07-10
CN101802386A (zh) 2010-08-11
RU2010115180A (ru) 2011-10-27
JP2010539385A (ja) 2010-12-16
WO2009037100A1 (de) 2009-03-26
US20100192921A1 (en) 2010-08-05
EP2201239A1 (de) 2010-06-30

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