WO2017167499A1 - Dispositif d'amortissement de pression pour une pompe à fluide, en particulier pour une pompe haute pression d'un système d'injection de carburant - Google Patents

Dispositif d'amortissement de pression pour une pompe à fluide, en particulier pour une pompe haute pression d'un système d'injection de carburant Download PDF

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Publication number
WO2017167499A1
WO2017167499A1 PCT/EP2017/053386 EP2017053386W WO2017167499A1 WO 2017167499 A1 WO2017167499 A1 WO 2017167499A1 EP 2017053386 W EP2017053386 W EP 2017053386W WO 2017167499 A1 WO2017167499 A1 WO 2017167499A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
pressure
damping device
pump
fluid
Prior art date
Application number
PCT/EP2017/053386
Other languages
German (de)
English (en)
Inventor
Muzaffar Fatdachow
Marco Lamm
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 WO2017167499A1 publication Critical patent/WO2017167499A1/fr

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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets
    • 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
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0041—Means for damping pressure pulsations
    • 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
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • 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
    • F04B53/001—Noise damping
    • F04B53/004—Noise damping by mechanical resonators
    • 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
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections

Definitions

  • Pressure damping device for a fluid pump, in particular for a high pressure pump of a fuel injection system
  • the invention relates to a pressure damping device for a fluid pump, in particular for a high pressure pump of a fuel injection system of an internal combustion engine according to the preamble of claim 1.
  • high pressure pumps are used as fluid pumps that compress fuel to a high pressure and deliver it to a high pressure accumulator.
  • the pressure in the high-pressure accumulator serves as injection pressure, with which the fuel into a combustion chamber of a
  • diaphragm dampers or diaphragm cans are used as pressure damping devices.
  • the diaphragm dampers form separate components that are attached to the high-pressure pump.
  • a membrane damper mounted on the high-pressure pump is known, for example, from the document DE 10345725 A1.
  • the diaphragm damper is accommodated in a fluid space, which forms between a flat end face of the housing of the high-pressure pump and a housing cover. Through the fluid space, the fuel is passed on the low-pressure side to the intake valve of the high-pressure pump, so that the pressure pulsations emanating from the high-pressure pump are damped in the direction of the low-pressure circuit.
  • the present invention has the object, a pressure damping device for a fluid pump, in particular for a high-pressure pump of a
  • a pressure damping device with the characterizing features of claim 1 is proposed.
  • Component can be attached outside the housing of the fluid pump.
  • the separate housing body can be found on the housing of the fluid pump a suitable place to allow a space-saving design.
  • the separate housing body comprises two housing parts.
  • the two housing parts are preferably each plate-shaped and each have a recess with a peripheral edge for receiving the at least one damping element.
  • the second housing part has a peripheral edge with undercuts, wherein between the undercuts
  • Support segments are formed and the gaps between the support segments form the flow openings.
  • the second housing part rests with a substantially flat bearing surface on a first end face of the fluid pump.
  • the attachment of the separate housing body to the fluid pump without modification of the housing of the fluid pump is possible.
  • a connecting piece for a supply line is formed on the first housing part.
  • the second housing part is designed as a cylindrical bottom part, which is hydraulically sealed in the first cylindrical recess of the first housing part.
  • the cylindrical bottom part preferably has a closed contact surface, with which the bottom part rests against a second substantially planar end face of the housing, wherein the second planar end face is formed substantially perpendicular to the first planar end face on the housing of the fluid pump.
  • the first housing part is equipped with at least two projections, with which the housing body on the first
  • End face of the housing of the fluid pump is screwed.
  • a first connection piece for a supply line is formed.
  • a lateral connection for the supply line and by a preferably further lateral connection for the inlet channel takes place a lateral pressurization of the at least one damping element, whereby the pressure load can be equally distributed over the active surfaces of the damping element.
  • Figure 1 is a partial perspective view of a fluid pump with a
  • Figure 2 is an enlarged perspective sectional view of
  • Figure 3 is a partial perspective view of a fluid pump with a
  • FIG. 4 shows a perspective sectional illustration of the pressure damping device in FIG. 3, FIG.
  • Figure 5 is a second perspective sectional view of
  • FIG. 6 is a perspective view of the pressure damping device in FIG.
  • FIG. 1 to 6 is a pressure damping device 20 for a
  • the fluid pump 10 is in each case a high-pressure pump
  • the high-pressure pump 10 has a housing 11 with a first planar end face 12.
  • an inlet channel 13 is formed, via which the fuel is arranged in the housing 11 and not shown pump working space, for example, via an inlet valve is supplied.
  • the fuel is compressed by means of a pump piston, also not shown.
  • compressed fuel is pumped via an outlet, not shown, into a high-pressure accumulator of the fuel injection system.
  • the housing 11 can be screwed to an engine block, not shown, of the internal combustion engine.
  • the pressure damping device 20 has at least one damping element 30, which is arranged in a fluid space 15.
  • the fluid space 15 is hydraulically connected to a low-pressure-side supply line 19 of the fuel injection system indicated by an arrow connected. Through the fluid space 15, the fuel is the low pressure side via the inlet channel 13 and the intake valve, not shown
  • the fluid space 15 is in an outside of the housing 11 of the high-pressure pump
  • the at least one damping element 30 is held with a biasing device.
  • the housing 10 of the high-pressure pump 10 has the first planar end face 12 with a sufficiently large area which allows the flat housing body 21 to be connected to the housing 11 with a flat broad side on the end face 12 can be.
  • the housing body 21 has two plate-shaped housing parts, namely a first, outer housing part 21.1 and a second, housing-side housing part 21.2.
  • the two housing parts 21.1, 21.2 which are made for example of plastic, preferably made of thermoset, limit the fluid space 15, so that the separate housing body 21 receives the at least one damping element 30 for damping hydraulic pressure pulsations.
  • the first housing part 21.1 according to Figure 2 with a first, preferably cylindrical recess 22 with a
  • the first recess 22 is surrounded by a first circumferential edge 24 with a first, preferably annular end face 25.
  • a first housing part 21.1 is according to Figure 1, a first
  • Connecting piece 41 formed for connecting the supply line 19. Of the Connecting piece 41 leads with an opening, not shown on the
  • the second housing part 21. 2 has a second, preferably cylindrical recess 26 with a bottom surface 27. Furthermore, the second housing part 21.2 has a housing-side flat support surface 28, with which the second housing part 21.2 rests flat on the flat end face 12 of the housing 11 and is fastened by means of fastening screws 16. In the bottom surface 27, an opening is present, which communicates with the inlet channel 13 and which is sealed between the end face 12 and the support surface 28 to the inlet channel 13 with a sealing ring. On the second housing part 21.2 another connection piece 42 is formed for example, a return line.
  • Recess 26 enclosing second edge 32 is formed, which is surrounded by an outer circumferential annular surface 29.
  • a sealing ring is embedded.
  • the second circumferential edge 32 forms, with a step 31 pointing into the fluid space 15 and with undercuts 34 distributed over the circumference, support segments 35 distributed over the circumference of the second edge 32 with support surfaces 33.
  • the damping element 30 is in the form of a membrane box with an edge 36.
  • Housing body 21 held or clamped.
  • the undercuts 34 form at the second circumferential edge 32 between the support segments 35
  • the high-pressure pump 10 is equipped, for example, with a metering unit 40 which is positioned on the first end face 12.
  • a metering unit 40 which is positioned on the first end face 12.
  • the housing 11 of the high-pressure pump 10 has a second plane end face 17, which runs preferably at right angles to the first end face 12 on the housing 11.
  • Housing body 21 is assigned to the housing 11, a further third end face 18.
  • the further end face 18 also runs on the housing 11 preferably at right angles to the second end face 17.
  • the housing body 21 has a second embodiment
  • Fuel injection system is formed laterally on a first narrow side 44 on the first housing part 21.1.
  • a further connecting piece 46 is integrally formed, which is hydraulically sealed with a sealing ring in the inlet channel 13 formed in the housing 11.
  • the lateral connection of the feed line 19 and the inlet channel 13, a better lateral flow through the fluid space 15, whereby the at least one damping element 30 is flowed around radially with fuel. This achieves a better damping of the pulsation waves.
  • the flow direction here is not the flow direction of the fuel, but the direction of the pressure pulsations, which start from the pump working chamber of the high-pressure pump and act back into the fluid space 15.
  • a temperature sensor can be provided.
  • the pressure damping device 20 for example, two damping elements 30.1 and 30.2 each in the form of a membrane can.
  • the two damping elements 30.1, 30.2 are by means of a coil spring 53 as
  • first support segments 48 each having a first support surface 49 are arranged in a circle on the top surface 23 of the first recess.
  • first damping element 30.1 is located with an edge 36.1.
  • the second housing part 21.2 was sunk into the first recess 22 of the first housing part 21.1 for reasons of space.
  • the second housing part 21.2 is designed as a cylindrical bottom part 50 with a further peripheral edge 51, wherein the outer diameter of the peripheral edge 51 is adapted to the inner diameter of the first cylindrical recess 22 of the first housing part 21.1.
  • the bottom part 50 further has a flat, for example, closed outer bearing surface 58. With the support surface 58, the housing body 21 is aligned with the second end face 17 of the housing 11.
  • the outer peripheral surface of the peripheral edge 51 is provided with a groove for receiving a sealing ring, so that the second peripheral edge 51 of the cylindrical bottom portion 50 is received hydraulically sealed with the peripheral surface in the first recess 22. This results in the required fluid space 15 within the housing body 22.
  • the second circumferential edge 51 of the bottom part 50 in the first cylindrical recess 22 facing second support segments 54 each with second end-side support surfaces 55.
  • the housing-side second damping element 30.2 is located with an edge 36.2.
  • the second support segments 54, like the first support segments 48, are spaced apart from each other so that there are gaps therebetween that form second flow openings 56.
  • the spiral spring 53 serving to clamp the two damping elements 30.1, 30.2 is arranged between the two damping elements 30.1, 30.2.
  • one end of the coil spring 53 is supported on the edge 36.1 of the first damping element 30.1 and the other end of the coil spring 53 on the edge 36.2 of the second damping element 30.2 from.
  • the housing body 21 is equipped with two projections 43, for example, as shown in FIGS. 3 and 4, which are fastened to the first end face 12 of the housing 11 by the fastening screws 16.
  • damping device 20 is not based on the application described for a high pressure pump 10 of a
  • Damping device 20 can also be applied to other functional elements of the fuel injection system, in which a flatter
  • Housing body 21 can be attached to a housing 11 of the functional unit.

Landscapes

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

Abstract

L'invention concerne un dispositif d'amortissement de pression (10) pour une pompe à fluide (10), en particulier pour une pompe haute pression d'un système d'injection de carburant, ce dispositif comprenant au moins un élément d'amortissement (30) qui est agencé dans un espace pour fluide (15). La pompe à fluide (10) présente un carter (11). Il est prévu un corps de carter séparé (21) dans lequel est ménagé l'espace pour fluide (15) pour recevoir l'élément d'amortissement (30). Ce corps de carter séparé (21) est fixé sur le carter (11) de la pompe à fluide (10).
PCT/EP2017/053386 2016-04-01 2017-02-15 Dispositif d'amortissement de pression pour une pompe à fluide, en particulier pour une pompe haute pression d'un système d'injection de carburant WO2017167499A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016205428.7A DE102016205428A1 (de) 2016-04-01 2016-04-01 Druckdämpfungseinrichtung für eine Fluidpumpe, insbesondere für eine Hochdruckpumpe eines Kraftstoffeinspritzsystems
DE102016205428.7 2016-04-01

Publications (1)

Publication Number Publication Date
WO2017167499A1 true WO2017167499A1 (fr) 2017-10-05

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PCT/EP2017/053386 WO2017167499A1 (fr) 2016-04-01 2017-02-15 Dispositif d'amortissement de pression pour une pompe à fluide, en particulier pour une pompe haute pression d'un système d'injection de carburant

Country Status (2)

Country Link
DE (1) DE102016205428A1 (fr)
WO (1) WO2017167499A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11242832B2 (en) 2018-05-18 2022-02-08 Eagle Industry Co., Ltd. Structure for attaching metal diaphragm damper
US11261835B2 (en) * 2018-05-18 2022-03-01 Eagle Industry Co., Ltd. Damper device
US11293391B2 (en) 2018-05-18 2022-04-05 Eagle Industry Co., Ltd. Damper device
US11326568B2 (en) 2018-05-25 2022-05-10 Eagle Industry Co., Ltd. Damper device
US11346312B2 (en) 2018-05-18 2022-05-31 Eagle Industry Co., Ltd. Damper unit

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017213891B3 (de) 2017-08-09 2019-02-14 Continental Automotive Gmbh Kraftstoffhochdruckpumpe für ein Kraftstoffeinspritzsystem
DE102019200796A1 (de) * 2019-01-23 2020-07-23 Robert Bosch Gmbh Dämpfermodul
US20220268265A1 (en) * 2021-02-23 2022-08-25 Delphi Technologies Ip Limited Fuel pump and damper cup thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10327408A1 (de) * 2002-10-19 2004-04-29 Robert Bosch Gmbh Vorrichtung zum Dämpfen von Druckpulsationen in einem Fluidsystem, insbesondere in einem Kraftstoffsystem einer Brennkraftmaschine
DE10345725A1 (de) 2003-10-01 2005-04-21 Bosch Gmbh Robert Fluidpumpe, insbesondere Kraftstoff-Hochdruckpumpe
JP2007218264A (ja) * 2007-04-16 2007-08-30 Hitachi Ltd ダンパ機構及び高圧燃料供給ポンプ
EP2317119A1 (fr) * 2009-11-03 2011-05-04 Magneti Marelli S.p.A. Pompe à combustible dotée d'un dispositif d'amortissement pour un système à injection directe
DE102012222178A1 (de) * 2012-12-04 2014-06-05 Robert Bosch Gmbh Kraftstoffhochdruckpumpe für eine Brennkraftmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10327408A1 (de) * 2002-10-19 2004-04-29 Robert Bosch Gmbh Vorrichtung zum Dämpfen von Druckpulsationen in einem Fluidsystem, insbesondere in einem Kraftstoffsystem einer Brennkraftmaschine
DE10345725A1 (de) 2003-10-01 2005-04-21 Bosch Gmbh Robert Fluidpumpe, insbesondere Kraftstoff-Hochdruckpumpe
JP2007218264A (ja) * 2007-04-16 2007-08-30 Hitachi Ltd ダンパ機構及び高圧燃料供給ポンプ
EP2317119A1 (fr) * 2009-11-03 2011-05-04 Magneti Marelli S.p.A. Pompe à combustible dotée d'un dispositif d'amortissement pour un système à injection directe
DE102012222178A1 (de) * 2012-12-04 2014-06-05 Robert Bosch Gmbh Kraftstoffhochdruckpumpe für eine Brennkraftmaschine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11242832B2 (en) 2018-05-18 2022-02-08 Eagle Industry Co., Ltd. Structure for attaching metal diaphragm damper
US11261835B2 (en) * 2018-05-18 2022-03-01 Eagle Industry Co., Ltd. Damper device
US11293391B2 (en) 2018-05-18 2022-04-05 Eagle Industry Co., Ltd. Damper device
US11346312B2 (en) 2018-05-18 2022-05-31 Eagle Industry Co., Ltd. Damper unit
US11326568B2 (en) 2018-05-25 2022-05-10 Eagle Industry Co., Ltd. Damper device

Also Published As

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