EP2252795B1 - Pompe à carburant - Google Patents

Pompe à carburant Download PDF

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Publication number
EP2252795B1
EP2252795B1 EP09723140.1A EP09723140A EP2252795B1 EP 2252795 B1 EP2252795 B1 EP 2252795B1 EP 09723140 A EP09723140 A EP 09723140A EP 2252795 B1 EP2252795 B1 EP 2252795B1
Authority
EP
European Patent Office
Prior art keywords
housing part
fuel pump
pump according
gearwheel
housing
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
EP09723140.1A
Other languages
German (de)
English (en)
Other versions
EP2252795A2 (fr
Inventor
Johann Warga
Friedrich Boecking
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 EP2252795A2 publication Critical patent/EP2252795A2/fr
Application granted granted Critical
Publication of EP2252795B1 publication Critical patent/EP2252795B1/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
    • 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
    • F04C2/18—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 with similar tooth forms
    • 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
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/086—Carter
    • 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
    • F04C2230/20—Manufacture essentially without removing material

Definitions

  • the invention relates to a fuel pump, in particular an external gear pump for fuel injection systems. Specifically, the invention relates to the field of fuel injection systems of air compressing, self-igniting internal combustion engines.
  • a pump arrangement for high-pressure fuel supply in fuel injection systems of internal combustion engines is known.
  • two spatially separate pumps are housed in a housing, wherein a low pressure pump is connected to a radial piston pump.
  • the low-pressure pump is provided on or in the pump housing of the radial piston pump on a drive side facing away from the side and driven by a drive shaft of the radial piston pump.
  • a clutch is interposed between the drive shaft of the radial piston pump and a shaft of the low-pressure pump.
  • the housing of the low pressure pump is further mounted via a centering on the pump housing of the radial piston pump.
  • the from the DE 197 36 160 A1 known pump assembly has the disadvantage that the manufacture and assembly of the pump housing is expensive. It is conceivable that the pump housing is formed of aluminum, which must be braced and additionally sealed. A seal of the pump housing is conceivable, for example, by a compaction of the pores in the casting by an adhesive. However, such concepts are complex and lead to increased costs in the manufacture and assembly of a known pump assembly.
  • a pump in the form of an external gear pump is known.
  • the pump has a housing part, wherein two gears are arranged in the region of the housing part.
  • the housing part may be made of sheet metal.
  • To support the gears separate axles or shafts are provided in the housing part. The production and installation of the pump is complicated and expensive due to the separate bearings of the gears.
  • the pump according to the invention with the features of claim 1 has the advantage that the pump is simple and inexpensive to manufacture and assemble. When deep drawing of the housing part while the bearing pin is already made with, so that it does not need to be manufactured and assembled as a separate part.
  • the fuel pump on one or more housing parts.
  • the fuel pump can also have a basic body, which is closed by a housing part.
  • the housing part can then form a cover of the housing of the fuel pump. Due to the design of the housing part of a deep-drawn sheet metal, a cost-effective production of the housing part is possible.
  • one or more receptacles may be provided on the housing part in order to receive one or more gears and optionally further elements, in particular a coupling.
  • a gear and another gear may be provided, which are formed on a receptacle and a further receptacle, which are formed on the housing part. are stored and engage each other so that they are in operative connection with each other to form a gear pump.
  • the housing part formed from the deep-drawn sheet metal is preferably not or only selectively reworked.
  • the housing part may be a selective post-processing of the housing part in the region of a bearing bolt advantageous, which is formed by deep drawing, wherein the gear is mounted on the selectively reworked bearing pin.
  • a trained by deep drawing bearing pin receives a bearing sleeve on which the gear is mounted.
  • the bearing sleeve can be pressed in an advantageous manner on the bearing pin, with a further post-processing of the bearing pin is not required.
  • the gear wheel which is mounted at least indirectly on the receptacle, on a front side, which faces the housing part, designed rounded.
  • the configured by deep drawing housing part may have a certain radius in the region of the gear, wherein the rounded gear is adjusted accordingly. This allows a further simplification of the production and a stable configuration of the housing part.
  • the housing part is connected to a further housing part or the like, wherein at least one punched fixing hole is provided on the housing part, which is reinforced by an eye.
  • a housing part designed as a housing cover the housing part can also be surrounded or ribbed by a plastic casting compound, so that it has stiffening ribs. This increases the stability of the housing part during operation and makes an optimized design of the housing part possible.
  • At least one sealing ring is provided between the housing part and a further housing part or the like, which is inserted into a formed by deep drawing bead of the housing part.
  • the bead can be designed so that it additionally stiffened the housing.
  • the deep-drawn sheet metal is formed from a steel sheet which is coated with a coating.
  • a coating may for example consist of nickel.
  • Fig. 1 shows a fuel pump 1 in a side view according to a first embodiment of the invention.
  • the fuel pump 1 can serve in particular as an external gear pump for fuel injection systems of air-compressing, self-igniting internal combustion engines.
  • a preferred use of the fuel pump 1 is for a fuel injection system with a fuel rail, a so-called common rail that stores diesel fuel under high pressure.
  • the fuel pump according to the invention is also suitable for other applications.
  • the fuel pump 1 has a multi-part housing 2.
  • the housing 2 comprises a housing part 3 designed as a housing cover and a housing part 3 in the view of FIG Fig. 1 behind the housing part 3 lying further housing part 4, which is designed as a housing body.
  • the housing parts 3, 4 and the housing 2 are connected together.
  • the fuel pump 1 also has an intake 5, via which a supply of fuel into the fuel pump 1 takes place. Further, a bore 6 is provided in the housing part 3 of the housing 2, which leads away from a lying in the interior of the housing 2 pressure chamber of a gear pump of the fuel pump 1.
  • the fuel pump 1 has a gear 7 and a further gear 8, which are arranged within the housing 2 and whose position with respect to the housing part 3 of the housing 2 in the Fig. 1 is illustrated by broken lines.
  • the gears 7, 8 are engaged, so that an operative connection between them, to form a gear pump.
  • the fuel pump 1 of the first embodiment will be described below with reference to FIGS Fig. 2 described in further detail.
  • Fig. 2 shows a partial cut through in the Fig. 1 shown fuel pump 1 along the designated II section line.
  • the housing part 3 of the housing 2 is formed from a deep-drawn sheet metal, which may be coated with a coating of nickel or the like.
  • a receptacle 10 and a further receptacle 11 are formed on the housing part 3.
  • the gear 7 is mounted on the receptacle 10.
  • the further gear 8 is mounted on the receptacle 11.
  • the receptacle 10 is selectively refinished on a bearing surface 12, while the further receptacle 11 is selectively refinished on a bearing surface 13.
  • the housing part 3 in the area of the bearing surfaces 12, 13 of the receptacles 10, 11 selectively refinished.
  • the housing part 3 is preferably not further refinished, so that a cost-effective production is possible.
  • the housing part 3 has punched fixing holes 14, 15, which serve for fastening the housing part 3 to the further housing part 4.
  • the fixing hole 15 is reinforced by means of an eye 16 in the illustrated embodiment.
  • the eye 16 is connected to an outer side 17 of the housing part 3 by welding to the housing part 3. Further, on the housing part 3 by deep drawing dents 18, 18 'are formed, which serve as Zulaufnuten.
  • the deep-drawn housing part 3, the gears 7, 8 in the area of the receptacles 10, 11 at least substantially.
  • the gears 7, 8 it is also possible for the gears 7, 8 to protrude into the further housing part 4 via an inner side 19 of the housing part 3.
  • the receptacles 10, 11 may also be formed on the inside 19 also. Further, it is possible that the receptacles 10, 11 are reset, as illustrated in FIG. 9.
  • the gears 7, 8 are in an engaging portion 20 with each other. Further openings, in particular bores, for example the bore 6, can be configured by stamping, cutting or the like in the housing part 3.
  • the receptacles 10, 11 configured as a bearing pin.
  • the design can be achieved at least essentially by deep drawing.
  • the bearing pin that is, the receptacles 10, 11, to the bearing surfaces 12, 13, an advantageous storage of the gears 7, 8 can be achieved.
  • the receptacles 10, 11, which are designed as bearing pins also serve for the indirect storage of the gears 7, 8, as it is based on the Fig. 6 is described in further detail.
  • Fig. 3 shows the in Fig. 2 labeled III section of a fuel pump 1 according to a second embodiment of the invention.
  • the punched fixing hole 14 is reinforced with a sleeve-shaped eye 16 ', which is fixed, for example by welding on the outside 17 of the housing part 3.
  • the housing part 3 of the housing 2 is surrounded by a Kunststoffvergussmasse 25, which may also extend over the further housing part 4, so that the housing 2 is at least substantially cast in plastic.
  • Fig. 4 shows the in Fig. 2 labeled IV section of a fuel pump 1 according to a third embodiment of the invention.
  • the gear 8 is configured rounded on an end face 26 which faces the housing part 3.
  • a radius 27 is predetermined for the gear 8, so that in contrast to that in the Fig. 3 shown embodiment, a significant edge rounding of the gear 8 is.
  • This has the advantage that the housing part 3 in the embodiment of the receptacle 11 in a region 28 with a certain radius 29 can be thermoformed. This is the production of the housing part 3 simplified.
  • the radius 29 is predetermined by the radius 27 of the gear 8.
  • a corresponding configuration can also be used for the receptacle 10 and the gear 7.
  • Fig. 5 shows the In Fig. 3 shown detail according to a fourth embodiment of the invention.
  • a bead 35 is formed by deep drawing, which in the illustrated section through a region 36 between the fixing hole 14 and the receptacle 10 (FIG. Fig. 2 ) runs.
  • a possible course of the bead 35 is also in the Fig. 1 illustrated.
  • the bead 35 can while doing the receptacles 10, 11 once closed.
  • the housing part 3 can bear on its inner side 19 on the further housing part 4, which in the Fig. 5 is shown in part. Between the housing part 3 and the further housing part 4, a sealing ring 37 is provided.
  • the sealing ring 37 is inserted into the bead 35, wherein the sealing ring 37 protrudes initially beyond the inside 19 of the housing part 3 - During assembly, that is, in the connection of the two housing parts 3, 4, the sealing ring 37 is pressed together, so that a tight connection between the housing parts 3, 4 with respect to the space in which the gear 7 is arranged exists.
  • Fig. 6 shows the in Fig. 2 labeled VI section of a fuel pump 1 according to a fifth embodiment of the invention.
  • the further receptacle 11 is not reworked It is pressed onto the receptacle 11, a bearing sleeve 38, on which the gear 8 is mounted.
  • Fig. 7 shows the in Fig. 3 shown section of a fuel pump 1 according to a sixth embodiment of the invention.
  • the housing part 3 is stiffened with at least one stiffening rib 39.
  • the stiffening rib 39 can in this case at several points 40, of which in the Fig. 7 To simplify the illustration, only the point 40 is marked, are connected to the housing part.
  • the stiffening ribs 39 are preferably designed and arranged such that the forces acting on the housing part 3 during operation of the fuel pump 1, in particular by the gears 7, 8, are absorbed.
  • Fig. 8 shows the in Fig. 2 shown section through a housing part 3 of a fuel pump 1 according to a seventh embodiment of the invention-
  • the receptacle 11 is configured shortened, so that it is set back from the inside 19 of the housing part 3.
  • the further receptacle 11 is thus configured as a shortened bearing pin.
  • the receptacle 11 serve to receive a coupling.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (13)

  1. Pompe à carburant, en particulier pompe à denture externe pour installations d'injection de carburant de moteurs à combustion interne à autoallumage et compression d'air, comprenant au moins une partie de boîtier (3), au moins une roue dentée (7) étant disposée dans la région de la partie de boîtier (3), caractérisée en ce que la partie de boîtier (3) est formée d'une tôle métallique emboutie profond, en ce qu'au moins un logement (10) est prévu au niveau de la partie de boîtier (3), au niveau duquel la roue dentée (7) est supportée de manière au moins indirecte et en ce qu'un boulon de palier (10) est réalisé au niveau de la partie de boîtier (3) par emboutissage profond, sur lequel boulon est supportée la roue dentée (7).
  2. Pompe à carburant selon la revendication 1, caractérisée en ce que la partie de boîtier (3) est post-usinée de manière sélective dans la région d'une surface de palier (12) du boulon de palier (10).
  3. Pompe à carburant selon la revendication 1, caractérisée en ce que le boulon de palier (10) reçoit une douille de palier (38) sur laquelle est supportée la roue dentée (7).
  4. Pompe à carburant selon la revendication 3, caractérisée en ce que la douille de palier (38) est pressée sur le boulon de palier (10).
  5. Pompe à carburant selon l'une quelconque des revendications 1 à 4, caractérisée en ce que la roue dentée (7) est configurée de manière arrondie au moins au niveau d'un côté frontal (26) qui est tourné vers la partie de boîtier (3).
  6. Pompe à carburant selon l'une quelconque des revendications 1 à 5, caractérisée en ce que la partie de boîtier (3) est configurée sous forme de couvercle de boîtier qui est connecté à une partie de boîtier supplémentaire (4) et en ce que la partie de boîtier (3) présente au moins un trou de fixation estampé (14, 15).
  7. Pompe à carburant selon la revendication 6, caractérisée en ce que le trou de fixation (14, 15) est renforcé avec un oeillet (16, 16') qui est notamment connecté par soudage à la partie de boîtier (3).
  8. Pompe à carburant selon la revendication 6 ou 7, caractérisée en ce qu'au moins la partie de boîtier (3) est entourée au moins en partie avec une masse de scellement en plastique (25).
  9. Pompe à carburant selon l'une quelconque des revendications 6 à 8, caractérisée en ce qu'entre la partie de boîtier (3) et la partie de boîtier supplémentaire (4) est prévue au moins une bague d'étanchéité (37) et en ce que la partie de boîtier (3) présente une moulure (35) réalisée par emboutissage profond, dans laquelle est insérée la bague d'étanchéité (37).
  10. Pompe à carburant selon l'une quelconque des revendications 1 à 9, caractérisée en ce que la partie de boîtier (3) est rigidifiée par au moins une nervure de rigidification (39).
  11. Pompe à carburant selon l'une quelconque des revendications 1 à 10, caractérisée en ce que dans la région de la partie de boîtier (3) est disposée une roue dentée supplémentaire (8) en liaison fonctionnelle avec la roue dentée (7) et en ce qu'un logement supplémentaire (11) est prévu au niveau de la partie de boîtier (3), au niveau duquel la roue dentée supplémentaire (8) est supportée de manière au moins indirecte.
  12. Pompe à carburant selon la revendication 11, caractérisée en ce que la tôle métallique emboutie profond est formée au moins sensiblement à partir d'une tôle d'acier.
  13. Pompe à carburant selon la revendication 12, caractérisée en ce que la tôle métallique emboutie profond est revêtue avec un revêtement qui se compose notamment de nickel.
EP09723140.1A 2008-03-17 2009-01-22 Pompe à carburant Not-in-force EP2252795B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810000701 DE102008000701A1 (de) 2008-03-17 2008-03-17 Brennstoffpumpe
PCT/EP2009/050685 WO2009115355A2 (fr) 2008-03-17 2009-01-22 Pompe à carburant

Publications (2)

Publication Number Publication Date
EP2252795A2 EP2252795A2 (fr) 2010-11-24
EP2252795B1 true EP2252795B1 (fr) 2016-07-13

Family

ID=40977248

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09723140.1A Not-in-force EP2252795B1 (fr) 2008-03-17 2009-01-22 Pompe à carburant

Country Status (3)

Country Link
EP (1) EP2252795B1 (fr)
DE (1) DE102008000701A1 (fr)
WO (1) WO2009115355A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1022681B1 (nl) 2015-01-14 2016-07-14 Atlas Copco Airpower N.V. Behuizing voor een compressor- of expanderinstallatie, vacuümpomp, generator of dergelijke
DE102016225883A1 (de) * 2016-12-21 2018-06-21 Robert Bosch Gmbh Zahnradpumpe für ein Abwärmerückgewinnungssystem
DE102017203004A1 (de) 2017-02-24 2018-08-30 Robert Bosch Gmbh Zahnradpumpe für ein Abwärmerückgewinnungssystem

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2759426A (en) * 1955-11-17 1956-08-21 Tuxco Corp Rotary pump
US4366779A (en) * 1978-01-16 1983-01-04 Knecht John E Wind driven heating system
EP0159968A3 (fr) * 1984-04-24 1987-05-13 CORINT S.r.l. Pompe pneumatique à palettes avec carter en tôle métallique estampée
DE19736160A1 (de) 1997-08-20 1999-02-25 Bosch Gmbh Robert Pumpenanordnung zur Kraftstoffhochdruckversorgung bei Kraftstoffeinspritzsystemen von Brennkraftmaschinen
DE10341841A1 (de) * 2003-09-09 2005-04-07 Siemens Ag Nach dem Gerotorprinzip arbeitende Kraftstoffpumpe
US7220111B2 (en) * 2004-08-02 2007-05-22 Production Research, Llc Hydraulic pump
US20070098586A1 (en) * 2005-10-28 2007-05-03 Autotronic Controls Corporation Fuel pump

Also Published As

Publication number Publication date
DE102008000701A1 (de) 2009-09-24
WO2009115355A3 (fr) 2009-11-19
EP2252795A2 (fr) 2010-11-24
WO2009115355A2 (fr) 2009-09-24

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