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WO2018177753A1 - Pompe à carburant à haute pression - Google Patents

Pompe à carburant à haute pression Download PDF

Info

Publication number
WO2018177753A1
WO2018177753A1 PCT/EP2018/056430 EP2018056430W WO2018177753A1 WO 2018177753 A1 WO2018177753 A1 WO 2018177753A1 EP 2018056430 W EP2018056430 W EP 2018056430W WO 2018177753 A1 WO2018177753 A1 WO 2018177753A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel pump
fluid channel
pressure fuel
section
filter device
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.)
Ceased
Application number
PCT/EP2018/056430
Other languages
German (de)
English (en)
Inventor
Guido Bredenfeld
Stephan Wehr
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 WO2018177753A1 publication Critical patent/WO2018177753A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • F02M59/48—Assembling; Disassembling; Replacing
    • 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
    • F02M2200/27—Fuel-injection apparatus with filters
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8061—Fuel injection apparatus manufacture, repair or assembly involving press-fit, i.e. interference or friction fit
    • 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
    • F02M2200/9015—Elastomeric or plastic 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals
    • F02M2200/9076—Non-ferrous metals

Definitions

  • the invention relates to a high-pressure fuel pump according to the preamble of claim 1.
  • DE 10 2014 225 319 A1 describes a high-pressure fuel pump with a housing, an inlet, a delivery section, and an outlet.
  • the high-pressure fuel pump is designed as a piston pump, according to the delivery section comprises a pump piston.
  • a fuel filter device is not explicitly mentioned in DE 10 2014 225 319 A1, such is usually present to be present in the fuel
  • the filter device is designed in the manner of a cylindrical pot, wherein the filter section is flowed through from the outside to the inside and the fuel through the annular base portion of the
  • Filter device improved and / or allows a larger flow rate. Furthermore, it is prevented that the filter section, in particular when it is loaded with dirt or other contaminants, at least partially bulges inward and thus forms a throttling constriction or even collapses inwards. This in turn reduces the risk of vapor bubbles forming at higher flow rates.
  • radially is to be understood very broadly and in no way refers to a flow directed only at an angle of 90 ° to a longitudinal axis of the fluid channel and / or the filter device " leave.
  • cylindrical is to be understood very broadly and in no way designates a filter section which basically has an axially straight section and a circular cross section.Very different cross sections of the filter section are present under the term “cylindrical”, for example triangular or polygonal or elliptical Cross sections, and in the axial direction variable cross sections or those that are conical or at least partially conical.
  • Base portion is pressed into a fluid channel. This is a simple and inexpensive way of fixing.
  • the filter device is arranged in a fluid channel, which opens directly into a damper chamber, in which a pressure damper is arranged.
  • a damper chamber is easily accessible from the outside, so that the fluid channel opening into the damper chamber is also good is accessible.
  • the filter device can be easily inserted into the fluid channel. In comparison to an arrangement of the filter device, for example in an inlet connection, this further reduces the risk of icing. If the filter device were arranged in the inlet nozzle, its temperature would sometimes reach its very low temperature
  • the extension of the fluid channel to the damper chamber is dimensioned so that the strength of a housing portion in which the fluid channel is present (even) is not unduly reduced.
  • the fluid channel is step-shaped. This is very easy to produce by machine.
  • the production of the fluid channel it is possible for it to be produced by drilling, milling, a chemical removal method, or by a generative production method, in particular a 3-D printing method. Especially by milling, a chemical removal process or a generative
  • any axial profiles and cross-sectional shapes of the fluid channel, in particular the extended area, can be realized.
  • Throttle losses can be reduced. This is especially true if the fluid channel at least partially has a non-circular cross-section or a non-cylindrical shape.
  • the annular base portion of the fuel filter device is made of metal, in particular of brass. This is relatively inexpensive and offers particular advantages when the filter device is pressed into the fluid channel.
  • the filter device is at least partially made of plastic. It is conceivable, for example, that the entire
  • Filter device is made as a plastic injection molded part, or that the filter device is made as a multi-component injection molded part with a base portion made of metal and a filter section made of plastic. This also leads to cost advantages.
  • FIG. 1 shows a first longitudinal section through a high-pressure fuel pump according to the invention
  • a high-pressure fuel pump carries in Figures 1 and 2 in total the reference numeral 10. It comprises a pump housing 12, which in the
  • an inlet 14 is formed by an inlet connection 16, which is welded to the pump housing 12. From the inlet 14 extends in the pump housing 12, a first fluid channel section 18 in the radial direction inwards. It goes over into a second fluid channel section 20, which extends in the axial direction in the pump housing 12 up to a pressure damper device 22.
  • This is a diaphragm damper, which will not be further described here.
  • the pressure damper device 22 is accommodated in a damper chamber 24, which between an upper end face 26 of the pump housing 12 and one on the Pump housing 12 welded housing cover 28 is formed.
  • the fluid channel section 20 opens into the damper chamber 24.
  • a third fluid channel section 30 extends from the upper end side 26, that is to say away from the damper space 24, up to one
  • Inlet valve 32 which is designed as a quantity control valve. This means that the inlet valve 32 can be forcibly held in an open position in a manner not described here in detail.
  • the inlet valve 32 is designed as a check valve, which opens to a delivery chamber 34.
  • the delivery chamber 34 is essentially limited by a
  • Wall of an axially in the pump housing 12 extending blind bore (without reference numeral) and a pump piston 36.
  • the pump piston 36 is guided in a piston sleeve (without reference numerals) in the sliding seat and in the axial direction movable.
  • the delivery chamber 34 and the pump piston 36 together form a delivery section 38.
  • a fourth fluid channel section 40 branches off in the radial direction, which leads via an outlet valve 42 designed as a check valve to an outlet connection 44, which forms an outlet 46.
  • the outlet port 44 is welded to the side wall of the pump housing 12. A between the exhaust valve 42 and the outlet port 44 located space (without reference numeral) is connected via a pressure relief valve 48 with the delivery chamber 34.
  • the high pressure fuel pump 10 is part of a not shown
  • Fuel system of an internal combustion engine To the inlet 14, fuel is delivered at a relatively low pressure by a prefeed pump. From the outlet 46 fuel is conveyed under relatively high pressure to a fuel rail, to which injectors are connected, which inject the fuel into combustion chambers of the internal combustion engine. The fuel passes through the inlet
  • Fluid channel section 18 and in the second fluid channel section 20 is indicated in Figure 1 by an arrow 49.
  • a fuel filter device 50 is arranged in the first fluid channel section 18.
  • This is a total pot-shaped and comprises an annular base portion 52 which is made in this case made of brass and which is held via a press fit in the first fluid channel section 18, that is pressed into the first fluid channel section 18.
  • annular base portion 52 extends in the axial direction of the
  • the filter section 54 is in the present case made of PPS plastic. It comprises a total of three webs 56, which protrude in the axial direction of the base portion 52 from the base portion 52. Between two adjacent webs 56 is in each case a flat, so in itself not curved sieve-like filter means 58 is present.
  • the upper projecting ends of the webs 56 in FIG. 3 are connected to one another by an annular cap which is closed at the top and which is likewise made of PPS plastic.
  • the filter device 50 could also be made entirely of plastic.
  • the cap 60 could not be closed but also a sieve-like filter means should be designed to be comprehensive.
  • the filter section 54 viewed from the base section 52, extends approximately in the direction of flow (arrows 49) of the fuel.
  • the fuel flows axially into the annular base section 52 and flows out radially (for example in FIG. 1 obliquely upward) out of the filter section 54 in accordance with the upper arrow 49 in FIG.
  • the second fluid channel section 20 widens toward the damper chamber 24. This is realized in the embodiment shown in that the fluid channel section 20 is stepped as a
  • Stepped bore is executed with a in Figure 1 upper and immediately opening into the damper chamber 24 section 62 with a larger diameter and a lower in Figure 1 and directly connected to the first fluid channel section 18 section 64 with a smaller diameter.
  • the second fluid channel section 20 is produced by drilling.
  • the pump housing 12 would be advantageously produced by such a method.
  • the abovementioned chemical removal method and the aforementioned generative production method have the advantage that, as a result, such fluid channels or fluid channel sections (in this case in particular the second fluid channel section 20) can also be produced, which have a non-circular cross-section in some areas.

Landscapes

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

Abstract

L'invention concerne une pompe à carburant à haute pression (10) qui comprend un carter de pompe (12), une entrée (14), un dispositif de filtration (50) de carburant, une section de refoulement (38) et une sortie (46). Le dispositif de filtration (50) de carburant comporte une section de base (52) annulaire et une section de filtration (54) globalement à peu près cylindrique s'étendant depuis la section de base. L'invention propose que le dispositif de filtration (50) soit disposé de telle manière que le carburant afflue axialement dans la section de base (52) annulaire et sort au moins également vers l'extérieur radialement de la section de filtration (54).
PCT/EP2018/056430 2017-03-27 2018-03-14 Pompe à carburant à haute pression Ceased WO2018177753A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017205124.8A DE102017205124A1 (de) 2017-03-27 2017-03-27 Kraftstoff-Hochdruckpumpe
DE102017205124.8 2017-03-27

Publications (1)

Publication Number Publication Date
WO2018177753A1 true WO2018177753A1 (fr) 2018-10-04

Family

ID=61691964

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/056430 Ceased WO2018177753A1 (fr) 2017-03-27 2018-03-14 Pompe à carburant à haute pression

Country Status (2)

Country Link
DE (1) DE102017205124A1 (fr)
WO (1) WO2018177753A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11739749B2 (en) 2021-06-25 2023-08-29 Collins Engine Nozzles, Inc. Additively manufactured fluid pumps and portions thereof
US11846300B2 (en) 2021-06-25 2023-12-19 Collins Engine Nozzles, Inc. Fluid pumps
US12012971B2 (en) 2021-06-25 2024-06-18 Collins Engine Nozzles, Inc. Fluid pumps

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018217990A1 (de) * 2018-10-22 2020-04-23 Robert Bosch Gmbh Hochdruckpumpenanordnung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007049963A1 (de) * 2007-10-18 2009-04-23 Robert Bosch Gmbh Brennstoffeinspritzventil
DE202008009931U1 (de) * 2008-07-23 2009-12-10 Voss Automotive Gmbh Verbinder für Fluid-Leitungen
JP2010156256A (ja) * 2008-12-26 2010-07-15 Denso Corp 高圧ポンプ
JP2011080391A (ja) * 2009-10-06 2011-04-21 Hitachi Automotive Systems Ltd 高圧燃料供給ポンプの吐出弁機構
JP2012154243A (ja) * 2011-01-26 2012-08-16 Nippon Soken Inc 高圧ポンプ
DE102014225319A1 (de) 2014-12-09 2016-06-09 Robert Bosch Gmbh Kraftstoff-Hochdruckpumpe mit einem Kolben

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007049963A1 (de) * 2007-10-18 2009-04-23 Robert Bosch Gmbh Brennstoffeinspritzventil
DE202008009931U1 (de) * 2008-07-23 2009-12-10 Voss Automotive Gmbh Verbinder für Fluid-Leitungen
JP2010156256A (ja) * 2008-12-26 2010-07-15 Denso Corp 高圧ポンプ
JP2011080391A (ja) * 2009-10-06 2011-04-21 Hitachi Automotive Systems Ltd 高圧燃料供給ポンプの吐出弁機構
JP2012154243A (ja) * 2011-01-26 2012-08-16 Nippon Soken Inc 高圧ポンプ
DE102014225319A1 (de) 2014-12-09 2016-06-09 Robert Bosch Gmbh Kraftstoff-Hochdruckpumpe mit einem Kolben

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11739749B2 (en) 2021-06-25 2023-08-29 Collins Engine Nozzles, Inc. Additively manufactured fluid pumps and portions thereof
US11846300B2 (en) 2021-06-25 2023-12-19 Collins Engine Nozzles, Inc. Fluid pumps
US12012971B2 (en) 2021-06-25 2024-06-18 Collins Engine Nozzles, Inc. Fluid pumps
US12404871B2 (en) 2021-06-25 2025-09-02 Collins Engine Nozzles, Inc. Fluid pumps

Also Published As

Publication number Publication date
DE102017205124A1 (de) 2018-09-27

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