EP2981702B1 - Pompe enfichable à piston pour carburant présentant un boîtier, au moins un piston axial mobile disposé dans le boîtier et un segment d'accouplement - Google Patents

Pompe enfichable à piston pour carburant présentant un boîtier, au moins un piston axial mobile disposé dans le boîtier et un segment d'accouplement Download PDF

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Publication number
EP2981702B1
EP2981702B1 EP14713092.6A EP14713092A EP2981702B1 EP 2981702 B1 EP2981702 B1 EP 2981702B1 EP 14713092 A EP14713092 A EP 14713092A EP 2981702 B1 EP2981702 B1 EP 2981702B1
Authority
EP
European Patent Office
Prior art keywords
piston
housing
coupling section
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.)
Not-in-force
Application number
EP14713092.6A
Other languages
German (de)
English (en)
Other versions
EP2981702A1 (fr
Inventor
Siamend Flo
Tamim Latif
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 EP2981702A1 publication Critical patent/EP2981702A1/fr
Application granted granted Critical
Publication of EP2981702B1 publication Critical patent/EP2981702B1/fr
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
    • 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
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for

Definitions

  • the invention relates to a fuel piston pump according to the preamble of claim 1, as well as sets of fuel piston plug pumps according to the independent claim.
  • the invention has the advantage that a total weight of a fuel piston-type plug-in pump can be reduced, with portions of a comparatively thick-walled housing of the fuel piston plug-in pump being replaced by a comparatively thin-walled sheet-metal deep-drawing element. Costs can also be reduced, as a material usage and a chipping cost for the housing of the fuel piston pump can be reduced. Also in the production of the fuel piston plug concentricity error between a piston guide in the housing and a receiving area of a piston seal in a coupling portion (seal carrier) of the fuel piston pump can be compensated. In this case, a transmitted by means of the piston seal on a piston of the fuel piston pump lateral force can be reduced. Thereby, wear between the piston and the piston guide in the housing can be reduced. Likewise, wear of the piston seal can be reduced.
  • the invention relates to a fuel piston pump with a housing, at least one arranged in the housing axially movable piston, and a coupling portion which is inserted in operation in an installation opening of a mounting structure and carries a housing seal for sealing between the coupling portion and mounting structure.
  • the fuel piston plug pump is for example an element of a fuel system for an internal combustion engine, in particular in a motor vehicle.
  • the per se known object of the housing seal is to prevent or at least minimize leakage of liquid media (for example engine oil) from the mounting structure into other areas of the internal combustion engine.
  • said coupling section is a separate element from the housing. Due to this special design, the coupling section can be designed in various embodiments and yet comparatively simple. In this case, tolerance-related radial asymmetries with respect to the piston can be minimized.
  • the fuel piston pump is particularly easy to produce, because the coupling portion is a sheet-deep-drawing element. This can reduce the weight of the fuel piston pump and save costs.
  • the coupling section is welded or compressed fluid-tight with the housing.
  • a particularly durable fuel-tight connection between the coupling portion and the housing can be produced.
  • the compression and in a subsequent second manufacturing step the welding done.
  • the coupling section has a holding section for holding the piston seal.
  • the piston seal encloses a radially outer portion of the piston so that leakage of fuel from the fuel piston pump into the mounting structure, or vice versa, leakage of liquid media (eg engine oil) from the mounting structure into the fuel piston pump can be prevented or at least minimized ,
  • liquid media eg engine oil
  • the fuel piston pump of the coupling portion is made in two parts, with a first portion which carries the housing seal, and the holding portion as a second portion.
  • the coupling section can be produced in a particularly simple and cost-effective manner, it being possible to design each of the two parts with comparatively few diameter steps.
  • an overall length of the coupling portion can be shortened.
  • the coupling section has a guide section for guiding a piston spring.
  • the piston spring is a pressure-loaded coil spring, which axially presses the piston during operation of the fuel piston pump, the piston against a piston driving the fuel piston cam of the internal combustion engine.
  • the coupling portion is connected via an axially extending collar with the housing.
  • the coupling portion on the housing - as already partially explained above - first pressed and then welded. This allows a particularly simple and durable connection.
  • the coupling portion is connected via a radially extending flange with the housing. Because - in contrast to the above-described axially extending collar - no radial positive connection between the coupling portion and the housing is present, in the manufacture of the fuel piston pump, the coupling portion, which is initially positioned by means of the holding portion and the piston seal radially on the piston , optimally positioned radially with respect to the housing of the fuel piston pump. As a result, in particular the concentricity errors described above can be minimized.
  • the fuel piston pump is improved when the housing seal rests against a shoulder of the coupling portion and is axially secured by a cover on the coupling portion.
  • the shoulder of the coupling portion forms a first part of a radially outwardly arranged on the coupling portion annular groove and the cover an associated second part.
  • the cover By the cover, an axial extrusion of the housing seal can be prevented from the annular groove of the coupling portion. This allows a particularly safe installation or operation of the fuel piston pump.
  • the fuel piston pump is executed in several sets (embodiments, types), it may be provided according to the invention that differ the fuel piston pumps of a set of the fuel piston pumps of another set essentially only by the configuration of the coupling portion.
  • particularly versatile embodiments of the fuel piston pump are made possible if this is produced in series in various designs.
  • these embodiments can be carried out particularly inexpensively, because only the coupling portion is different.
  • FIG. 1 shows a fuel delivery device 10 for a further not shown internal combustion engine in a much simplified representation.
  • a fuel tank 12 fuel via a suction line 14, by means of a prefeed pump 16, via a low pressure line 18, and via an actuatable by an electromagnetic actuator 20 ("solenoid") quantity control valve 22 a high pressure fuel pump - hereinafter referred to as fuel piston pump 24 fed.
  • a high-pressure fuel pump - hereinafter referred to as fuel piston pump 24 fed.
  • Fuel piston pump 24 is connected via a high-pressure line 26 to a high-pressure accumulator 28 ("common rail").
  • Other elements, such as valves of the fuel piston plug pump 24, are in the FIG. 1 not drawn.
  • the electromagnetic actuator 20 is controlled by a control and / or regulating device 30.
  • the quantity control valve 22 may also be formed as a unit with the fuel piston pump 24.
  • the quantity control valve 22 may be a forcibly openable inlet valve of the fuel piston plug pump 24.
  • the prefeed pump 16 conveys fuel from the fuel tank 12 into the low-pressure line 18.
  • the quantity-control valve 22 controls the fuel quantity supplied to the working space 25 of the fuel piston-type plug-in pump 24.
  • the mass control valve 22 may be closed and opened in response to a respective demand for fuel.
  • the fuel is for example gasoline or diesel fuel.
  • FIG. 2 shows a portion of the fuel piston plug pump 24 in a sectional view.
  • the illustrated section of the fuel piston plug pump 24 is designed substantially rotationally symmetrical about a longitudinal axis 33.
  • the fuel piston plug pump 24 comprises the housing 27, which in the present case is designed as a solid housing block and has a piston guide 36, in which the piston 23 is arranged axially movable.
  • the fuel piston pump 24 comprises a - in this case one-piece - coupling section 38 in a central region of FIG. 2 ,
  • the coupling section 38 is designed as a sheet-metal deep-drawing element.
  • the fuel piston plug pump 24 is inserted with the coupling portion 38 in an installation opening 40 of a mounting structure 32, for example, a cylinder head of an internal combustion engine.
  • the installation opening 40 is essentially cylindrical and comprises two diameter steps (without reference numerals).
  • a circumferentially circumferential housing seal 42 is arranged, which is designed here as an O-ring.
  • the coupling section 38 is also designed substantially rotationally symmetrical and has approximately a T-shape in the illustrated sectional view.
  • the coupling section 38 has a holding section 44, in which a piston seal 46 is arranged.
  • the piston seal 46 is held by a presently designed as an annular disk shutter disk 47, which is arranged radially within the coupling portion 38, for example clipped with this.
  • the piston seal 46 encloses a radially outer portion of the piston 23, which in the present case is designed in a lower area in the drawing with a reduced diameter.
  • the end portion 29 of the piston 23 may rest on the cam plate 31 (see FIGS FIG. 1 ).
  • the coupling portion 38 In a middle area of the FIG. 2 is at the coupling portion 38 and the housing seal 42 a present designed as an annular disc cover 48 arranged.
  • the cover 48 supplements the coupling portion 38 to a radially circumferential groove (annular groove 49), so that the housing seal 42 is arranged positively therein and its extrusion from the annular groove 49 is thus prevented.
  • a spring plate 50 is fixedly connected thereto.
  • a helical spring piston spring 52 is arranged.
  • an axial section of the piston spring 52 encloses a radially outer region of the coupling section 38, whereby a guide section 54 for guiding the piston spring 52 is formed on the coupling section 38.
  • the coupling section 38 has an axially extending and radially encircling collar 58 at its upper end in the figure.
  • the axially extending collar 58 of the coupling portion 38 is connected to the housing 27.
  • the lower end portion of the housing 27 in the drawing a diameter stage (without reference numeral) on which the axially extending collar 58 of the coupling portion 38 is arranged.
  • a coupled to the housing 27 pump flange 56 is shown, which in the FIG. 3 will be explained in more detail.
  • connection of the collar 58 with the housing 27 is made by means of compression (axial adhesion or radial positive engagement) and welding ("material bond”), resulting in a fluid-tight connection. This is in the FIG. 2 indicated by an arrow 59.
  • the end portion 29 of the piston 23 is rotated by the rotating cam 31 (see FIG. 1 ) moved periodically axially. This allows the fuel piston pump 24 in a conventional manner promote fuel in the high-pressure accumulator 28 (see FIG. 1 ).
  • FIG. 3 shows the embodiment of the fuel piston plug pump 24 according to FIG. 2 on a different scale.
  • a radially outer edge section of the at least partially rotationally symmetrical pump flange 56 is visible, with which the pump flange 56 rests on the mounting structure 32.
  • bores 57 of the pump flange 56 are visible, by means of which the pump flange 56 and thus the fuel piston plug pump 24 can be screwed to the mounting structure 32.
  • FIG. 4 shows a second embodiment of the fuel piston plug pump 24 in one of the FIG. 2 comparable sectional view.
  • the coupling portion 38 has a radially extending flange 60 in an upper region in the drawing, by means of which it is connected to the housing 27, for example, welded. Accordingly, a lower end portion of the housing 27 in the drawing is made substantially planar. Unlike the embodiment according to FIG. 2 is in the FIG. 4 none non-positive press connection between the coupling portion 38 and the housing 27 is present.
  • FIG. 5 shows a third embodiment of the fuel piston pump 24.
  • the coupling portion 38 is made in two parts, with an upper in the drawing portion 38a and a lower second portion 38b in the drawing.
  • the second portion 38b is designed such that it performs the function of the cover 48 (see FIGS. 2 to 4 ) with takes over.
  • the housing seal 42 is predominantly arranged on the first section 38a.
  • the second portion 38b includes the holding portion 44 and the guide portion 54.
  • the arrangement of the housing seal 42 at the first portion 38a and the second portion 38b substantially corresponds to the embodiments of FIGS FIGS. 2 to 4 , Accordingly, the shaping effected by the deep drawing of the first or second section 38a or 38b to the annular groove 49 is comparable. Also, the first portion 38 a at the diameter step of the housing 27 in one of the FIG. 2 comparable way pressed and welded.
  • first portion 38a at its lower end in the drawing on a radially inwardly directed inflection (arrow 62), which limits the available space for the piston seal 46 axially in the drawing upwards.
  • the first section 38a is compressed fluid-tight with the second section 38b in the present case.
  • a welded connection between the first section 38a and the second section 38b of the coupling section 38 is possible. It can be seen that the two-part coupling section 38 has fewer diameter steps by means of the sections 38a and 38b than the one-part embodiments according to FIGS FIGS.
  • the respectively comparatively simple sections 38a and 38b can be produced particularly cost-effectively as sheet-metal deep-drawing elements.
  • the thus executed sections 38a and 38b also allow an overall axial length of the coupling section 38 in comparison to the embodiments of FIGS FIGS. 2 to 4 to diminish.

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

Claims (9)

  1. Pompe enfichable à piston pour carburant (24) comprenant un boîtier (27) et une partie d'accouplement (38) qui peut être enfichée pendant le fonctionnement dans une ouverture d'installation (40) d'une structure rapportée (32) et qui porte un joint d'étanchéité de boîtier (42) pour l'étanchéité entre la partie d'accouplement (38) et la structure rapportée (32), la partie d'accouplement (38) étant un élément séparé du boîtier (27),
    caractérisée en ce que la partie d'accouplement (38) est un élément en tôle embouti profond.
  2. Pompe enfichable à piston pour carburant (24) selon l'une quelconque des revendications précédentes, caractérisée en ce que la partie d'accouplement (38) est soudée ou pressée de manière étanche aux fluides avec le boîtier (27).
  3. Pompe enfichable à piston pour carburant (24) selon l'une quelconque des revendications précédentes, caractérisée en ce que la partie d'accouplement (38) présente une partie de retenue (44) pour retenir un joint d'étanchéité de piston (46).
  4. Pompe enfichable à piston pour carburant (24) selon la revendication 3, caractérisée en ce que la partie d'accouplement (38) est en deux parties, avec une première partie (38a) qui porte le joint d'étanchéité de boîtier (42), et la partie de retenue (44) en tant que deuxième partie (38b).
  5. Pompe enfichable à piston pour carburant (24) selon l'une quelconque des revendications précédentes, caractérisée en ce que la partie d'accouplement (38) présente une partie de guidage (54) pour guider un ressort de piston (52).
  6. Pompe enfichable à piston pour carburant (24) selon l'une quelconque des revendications précédentes, caractérisée en ce que la partie d'accouplement (38) est connectée au boîtier (27) par le biais d'un col s'étendant axialement (58).
  7. Pompe enfichable à piston pour carburant (24) selon l'une quelconque des revendications 1 à 6, caractérisée en ce que la partie d'accouplement (38) est connectée au boîtier (27) par le biais d'une bride (60) s'étendant radialement.
  8. Pompe enfichable à piston pour carburant (24) selon l'une quelconque des revendications précédentes, caractérisée en ce que le joint d'étanchéité de boîtier (42) s'applique contre un épaulement (41) de la partie d'accouplement (38) et est fixé axialement à la partie d'accouplement (38) par un élément de recouvrement (48).
  9. Jeux de pompes enfichable à piston pour carburant (24) selon l'une quelconque des revendications précédentes, caractérisés en ce que les pompes enfichables à piston pour carburant (24) d'un jeu se distinguent des pompes enfichables à piston pour carburant (24) d'un autre jeu essentiellement uniquement par la configuration de la partie d'accouplement (38).
EP14713092.6A 2013-04-04 2014-03-26 Pompe enfichable à piston pour carburant présentant un boîtier, au moins un piston axial mobile disposé dans le boîtier et un segment d'accouplement Not-in-force EP2981702B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013205909.4A DE102013205909A1 (de) 2013-04-04 2013-04-04 Kraftstoff-Kolbensteckpumpe mit einem Gehäuse, mindestens einem in dem Gehäuse angeordneten axial bewegbaren Kolben, und einem Koppelabschnitt
PCT/EP2014/056042 WO2014161754A1 (fr) 2013-04-04 2014-03-26 Pompe enfichable à piston pour carburant présentant un boîtier, au moins un piston axial mobile disposé dans le boîtier et un segment d'accouplement

Publications (2)

Publication Number Publication Date
EP2981702A1 EP2981702A1 (fr) 2016-02-10
EP2981702B1 true EP2981702B1 (fr) 2017-10-18

Family

ID=50389429

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14713092.6A Not-in-force EP2981702B1 (fr) 2013-04-04 2014-03-26 Pompe enfichable à piston pour carburant présentant un boîtier, au moins un piston axial mobile disposé dans le boîtier et un segment d'accouplement

Country Status (5)

Country Link
EP (1) EP2981702B1 (fr)
KR (1) KR20150138221A (fr)
CN (1) CN105074194B (fr)
DE (1) DE102013205909A1 (fr)
WO (1) WO2014161754A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015209539A1 (de) * 2015-05-22 2016-11-24 Robert Bosch Gmbh Kraftstoffhochdruckpumpe
DE102017211353A1 (de) * 2017-07-04 2019-01-10 Robert Bosch Gmbh Kraftstoffhochdruckpumpe
DE112019004550T5 (de) * 2018-10-19 2021-06-17 Hitachi Astemo, Ltd. Hochdruckkraftstoffpumpe
DE102020208202A1 (de) * 2020-07-01 2022-01-05 Robert Bosch Gesellschaft mit beschränkter Haftung Kraftstoff-Hochdruckpumpe

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004015440B4 (de) * 2004-03-30 2021-06-17 Robert Bosch Gmbh Schweißverbindung zwischen einem dickwandigen Bauteil und einem dünnwandigem Bauteil sowie Kraftstoffhochdruckpumpe für eine Brennkraftmaschine
DE102004063075B4 (de) * 2004-12-28 2015-11-26 Robert Bosch Gmbh Kraftstoff-Hochdruckpumpe für eine Brennkraftmaschine mit einem Stufenkolben und einem Mengensteuerventil
JP4625789B2 (ja) * 2006-07-20 2011-02-02 日立オートモティブシステムズ株式会社 高圧燃料ポンプ
JP5501272B2 (ja) * 2011-03-08 2014-05-21 日立オートモティブシステムズ株式会社 高圧燃料供給ポンプ
DE102011082740B4 (de) * 2011-09-15 2022-03-03 Robert Bosch Gmbh Verfahren zur Herstellung einer Kolbenpumpe mit einem Gehäuse und mindestens einem in einer Kolbenführung des Gehäuses angeordneten axial bewegbaren Kolben

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE102013205909A1 (de) 2014-10-09
EP2981702A1 (fr) 2016-02-10
CN105074194A (zh) 2015-11-18
KR20150138221A (ko) 2015-12-09
WO2014161754A1 (fr) 2014-10-09
CN105074194B (zh) 2018-03-13

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