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US20090290994A1 - Suction Jet Pump - Google Patents

Suction Jet Pump Download PDF

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Publication number
US20090290994A1
US20090290994A1 US12/296,412 US29641207A US2009290994A1 US 20090290994 A1 US20090290994 A1 US 20090290994A1 US 29641207 A US29641207 A US 29641207A US 2009290994 A1 US2009290994 A1 US 2009290994A1
Authority
US
United States
Prior art keywords
suction
jet pump
mixing tube
eductor
point
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.)
Abandoned
Application number
US12/296,412
Other languages
English (en)
Inventor
Klemens Kieninger
Ralph Schröder
Michael Tittmann
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive 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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Assigned to CONTINENTAL AUTOMOTIVE GMBH reassignment CONTINENTAL AUTOMOTIVE GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TITTMANN, MICHAEL, SCHRODER, RALPH, KIENINGER, KLEMENS
Publication of US20090290994A1 publication Critical patent/US20090290994A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/46—Arrangements of nozzles
    • F04F5/467—Arrangements of nozzles with a plurality of nozzles arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/46—Arrangements of nozzles
    • F04F5/463—Arrangements of nozzles with provisions for mixing

Definitions

  • the invention relates to an eductor-jet pump, comprising a housing having a connection of a motive fluid line, an eductor jet nozzle, an adjoining mixing tube and a suction point located upstream of the mixing tube.
  • eductor-jet pumps are used in fuel tanks of motor vehicle, in order to deliver fuel from different areas of the fuel tank to a fuel pump located in the fuel tank.
  • Eductor-jet pumps of the aforementioned type are used in multiple-chamber tank systems, in which the fuel tank has at least two chambers, so as to be able to drain all chambers as efficiently as possible, especially in the event of a low filling level in the fuel tank.
  • the first type draws in fuel more or less directly through a suction point.
  • the eductor-jet pump is located at the point from which the fuel is pumped.
  • the second type of eductor-jet pumps are suction eductor-jet pumps, the suction point of which is connected to a suction line. The suction line is carried into the area from which the fuel is to be pumped.
  • this type of eductor-jet pump has the advantage of being independent of the site from which fuel is to be pumped.
  • a disadvantage of both types of eductor-jet pump is that the number of eductor-jet pumps needed is equal to the number of chambers to be drained. Despite their relatively simple construction, the cost of parts and assembly is considerable.
  • the object of the invention is to reduce the cost of draining a fuel tank having multiple chambers or areas to be drained.
  • the object is achieved in that the eductor-jet pump has a second suction point.
  • Providing a second suction point creates an eductor-jet pump with passive secondary suction, which does not need an additional drive in the form of a further motive jet.
  • the efficiency of the overall fuel delivery system is furthermore improved, since obviating the need for a motive jet for the second suction point means that the fuel pump needs to provide less hydraulic power for driving the eductor-jet pump.
  • the hydraulic power saved can either be delivered to the internal combustion engine of the motor vehicle as additional fuel delivery, or the fuel pump can be of smaller dimensions.
  • the eductor-jet pump with passive secondary suction is particularly effective in the case of small fuel delivery quantities.
  • the second suction point is especially easy to configure if the suction point opens into the mixing tube of the eductor-jet pump.
  • the design arrangement of the second suction point on the eductor-jet pump, particularly on the mixing tube, is relatively easy to configure if it has a smaller cross section than the first suction point. Assuming a first suction point cross section in the order of 100 mm 2 -200 mm 2 , the second suction point may be up to 100 times smaller in cross section.
  • a suction line can be fitted to the second suction point with little effort if the second suction point opens into a diffuser of the mixing tube, the diffuser being arranged on the side of the mixing tube remote from the eductor jet nozzle.
  • the arrangement of the second suction point can sometimes prove difficult. It has therefore proved advantageous to have the second suction point opening out in a section, preferably a cylindrical section, of the mixing tube situated upstream of the diffuser. This section has a sufficient axial length, which allows the second suction point to be located without any problems.
  • the second suction point is arranged in the area of the first suction point relative to the axial extent of the eductor-jet pump, preferably in the housing of the eductor-jet pump.
  • the mixing tube remains unaltered, making it possible to use existing forms of mixing tube.
  • the second suction point is located on the periphery of the eductor-jet pump at an angle of 20° to 180°, preferably between 90° and 180°, to the first suction point.
  • a small angle is advantageous when the areas from which the eductor-jet pump is to draw fuel lie in one direction relative to the eductor-jet pump, or both suction lines have to be laid in one direction owing to the space available in the fuel tank.
  • a reduction in the overall radial extent is achieved in another development with an eductor-jet pump in which the second suction point is arranged with its axial extent at an angle to the axial extent of the eductor-jet pump that deviates from the perpendicular.
  • the second suction point can be produced especially cost-effectively if it is integrally formed with the eductor-jet pump.
  • a housing or an eductor-jet pump formed in this way is particularly cost-effective to manufacture owing to the good mold release facility, especially where the second suction point is arranged at an angle of 180° to the first suction point.
  • the second suction point is embodied as a connection, to which a line in the form of a suction line can be connected.
  • the second suction point is embodied as a bore, into which a line in the form of a suction line can be inserted.
  • connection of the motive fluid line is arranged radially or axially in relation to the axial extent of the eductor-jet pump, according to the installation conditions.
  • an embodiment of the eductor-jet pump in which the second suction point has the same radial orientation as the connection has proved advantageous.
  • such an eductor-jet pump takes up little overall space in a radial direction.
  • such an eductor-jet pump can be cost-effectively manufactured by injection molding, the dies being of especially simple design, due to the fact that the connection and the second suction point both have the same radial orientation and the demolding direction associated therewith is shared.
  • a wider scope for adapting the eductor-jet pump according to the invention to various installation conditions is achieved by means of a separate diffuser, which is designed for connection to the mixing tube.
  • the radial position of the second suction point is fixed and therefore adapted to the actual installation situation according to the radial orientation of the diffuser in the assembly with the remainder of the mixing tube.
  • Such an eductor-jet pump is therefore versatile in use.
  • the connection of the diffuser to the remainder of the mixing tube is especially easy to make as a snap socket connection. It is also feasible, however, to connect the diffuser to the remainder of the mixing tube by means of a welded or adhesively bonded connection.
  • FIG. 1 shows the arrangement of an eductor-jet pump in a fuel tank
  • FIG. 2 shows a section through an eductor-jet pump according to the invention
  • FIGS. 3-6 show further embodiments of the eductor-jet pump according to FIG. 2 .
  • the fuel tank 1 represented in FIG. 1 comprises two chambers 2 , 3 , which are connected together via a saddle 4 .
  • a fuel supply unit 5 which is fitted into the fuel tank 1 via an opening 7 closed by a flange 6 , is arranged in the chamber 2 .
  • the fuel supply unit 5 comprises a swirl pot 8 , in which a fuel pump 9 is arranged. Fuel drawn out of the swirl pot 8 by the fuel pump 9 via a pump pre-filter 10 is delivered via a feed line 11 though the flange 6 to an internal combustion engine (not shown).
  • an eductor-jet pump 12 For filling the swirl pot 8 , an eductor-jet pump 12 , which draws fuel from the fuel tank 1 via a first suction point 13 and delivers it into the swirl pot 1 , is arranged in the base area of the swirl pot.
  • the eductor-jet pump 12 is driven by a motive fluid line 14 with fuel delivered by the fuel pump 9 . Whilst in the representation shown the motive fluid line 14 branches off from the feed line 11 , it is also feasible to feed the motive fluid line 14 directly from the pump stage of the fuel pump 9 .
  • the eductor-jet pump 12 In the area of the mixing tube 15 the eductor-jet pump 12 has a second suction point 16 , which is connected to a suction line 17 .
  • the suction line 17 is carried into the base area of the chamber 3 , so that in operation of the eductor-jet pump 12 fuel is delivered from the chamber 3 into the swirl pot 8 .
  • FIG. 2 shows the eductor-jet pump 12 from FIG. 1 .
  • the eductor-jet pump 12 has a common housing 18 , which links the various areas of the eductor-jet pump 12 together to form an integral structure.
  • An eductor jet nozzle 19 with a nozzle opening 20 which is oriented axially to the mixing tube 15 , is arranged in the housing 18 .
  • the mixing tube 15 comprises an inlet area 21 , and a cylindrical section 22 , adjoining which is a downstream diffuser 23 .
  • a first suction point 13 as primary suction is arranged upstream of the mixing tube 15 in the direction of flow. In the horizontal installation position of the eductor-jet pump 12 shown, the first suction point 13 is oriented vertically downwards.
  • the eductor jet nozzle 19 is integrally connected to a connection branch 24 , which at its end remote from the eductor jet nozzle 19 is provided with a pine-tree profile for connection of the motive fluid line 14 (not shown).
  • the connection branch 24 is arranged on the periphery of the eductor-jet pump 12 perpendicular to the axial extent of the eductor-jet pump 12 and at an angle of 180° to the first suction point 13 .
  • An opening in the eductor jet nozzle 19 made opposite the nozzle opening 20 for production reasons, is closed by means of an impressed ball 25 .
  • the cylindrical section 22 has a connection 26 , which in a similar way to the branch connection 24 is arranged on the periphery of the eductor-jet pump 12 perpendicular to the axial extent of the eductor-jet pump 12 and at an angle of 180° to the first suction point 13 .
  • Connected to the connection 26 is the suction line 17 (not shown), the connection 26 forming the second suction point 16 .
  • the suction line 17 may be designed with a pine-tree profile like the branch connection 24 .
  • the eductor-jet pump 12 in FIG. 3 differs from the eductor-jet pump in FIG. 2 in that the connection branch 24 is arranged coaxially with the horizontal extent of the eductor-jet pump 12 .
  • the connection 26 of the second suction point 16 is arranged in the area of the first suction point 13 , relative to the axial extent.
  • the connection 26 is in turn arranged on the periphery of the eductor-jet pump 12 perpendicular to the axial extent of the eductor-jet pump 12 and at an angle of 180° to the first suction point 13 .
  • FIG. 4 shows a sectional top view of an eductor-jet pump 12 , the basic construction corresponding substantially to the eductor-jet pump according to FIG. 3 .
  • the eductor-jet pump 12 has a horizontal connection branch 24 , which merges into the housing 18 .
  • the first suction point 13 is again situated on the underside of the eductor-jet pump 12 , so that it is hidden by the eductor jet nozzle 19 .
  • the connection 26 of the second suction point 16 is arranged on the periphery of the eductor-jet pump 12 at an angle of 90° to the first suction point 13 and therefore in the plane of projection.
  • the eductor-jet pump 12 thereby has an especially low overall height in a vertical direction.
  • the connection 26 is arranged at an angle deviating from the perpendicular in relation to the axial extent of the eductor-jet pump 12 , the angle a between the axial extent of the eductor-jet pump 12 and the axial extent of the connection 26 being 55°.
  • FIG. 5 shows an eductor-jet pump 12 having a basic construction according to FIG. 3 .
  • the second suction point 16 is arranged in the area of the diffuser 23 and takes the form of a bore 27 , in which the suction line (not shown) is fixed by insertion.
  • the eductor-jet pump 12 in FIG. 6 shows a further embodiment of the eductor-jet pump according to FIG. 5 .
  • the diffuser 23 has a connection 26 as second suction point 16 , the diffuser 23 being designed as a separate component.
  • the diffuser 23 On its side facing the mixing tube 15 the diffuser 23 has a radial circumferential groove on its inside diameter. This interacts with a bead 28 running radially around the outside diameter of the mixing tube 15 .
  • the clip connection thus formed allows the diffuser 23 to be fixed to the mixing tube 15 .
  • the radially circumferential design of the groove and the bead 28 allows the connection 26 to be oriented radially at any angle perpendicular to the axial extent of the eductor-jet pump 12 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)
US12/296,412 2006-04-07 2007-03-26 Suction Jet Pump Abandoned US20090290994A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006016515A DE102006016515A1 (de) 2006-04-07 2006-04-07 Saugstrahlpumpe
DE102006016515.2 2006-04-07
PCT/EP2007/052844 WO2007115925A1 (fr) 2006-04-07 2007-03-26 Pompe a jet aspirant

Publications (1)

Publication Number Publication Date
US20090290994A1 true US20090290994A1 (en) 2009-11-26

Family

ID=38104218

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/296,412 Abandoned US20090290994A1 (en) 2006-04-07 2007-03-26 Suction Jet Pump

Country Status (4)

Country Link
US (1) US20090290994A1 (fr)
EP (1) EP2007988A1 (fr)
DE (1) DE102006016515A1 (fr)
WO (1) WO2007115925A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100202898A1 (en) * 2009-02-09 2010-08-12 Robert Bosch Gmbh Jet pump assembly
US20110131789A1 (en) * 2008-09-01 2011-06-09 Inergy Automotive Systems Research (Societe Anonyme) Process for manufacturing a plastic fuel tank equipped with a pump
US20130047966A1 (en) * 2011-08-24 2013-02-28 Robert Bosch Gmbh Fuel supply system and anti-siphon jet pump
US20160102683A1 (en) * 2014-10-13 2016-04-14 Denso Corporation Jet pump, manufacturing method of jet pump, and fuel supply device having jet pump
JP2020094512A (ja) * 2018-12-11 2020-06-18 富士電機株式会社 エジェクタ
US11067044B2 (en) * 2016-09-16 2021-07-20 Vitesco Technologies GmbH Fluid conveying device
US11280353B2 (en) 2016-07-14 2022-03-22 Vitesco Technologies GmbH Suction jet pump with sealing of the injection mold installation opening by a metal ball fixed with plastic deformation
US11408383B2 (en) * 2018-11-20 2022-08-09 Walbro Llc Fuel pump assembly with electric motor fuel pump and fluid driven fuel pump
US20230013738A1 (en) * 2021-07-14 2023-01-19 Hyundai Motor Company Dual Purge System for Vehicle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3038667B1 (fr) * 2015-07-10 2017-08-11 Aisan Ind France Sa Pompe a jet, module jauge-pompe equipe d'une telle pompe a jet, et procede de fabrication associe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US86030A (en) * 1869-01-19 Alexander morton
US1784222A (en) * 1928-05-05 1930-12-09 Tridex Corp Suction atomizer
US5478209A (en) * 1994-07-11 1995-12-26 Pcf Group, Inc. Jet barrel and hose fitting insert for a jet pump
US5927338A (en) * 1996-04-18 1999-07-27 S.C. Johnson Commercial Markets, Inc. Mixing eductor

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE855656C (de) * 1941-04-13 1952-11-13 Johann Hans Siebenhuener Heinl Verfahren und Vorrichtung zum Foerdern von heissen Fluessigkeiten
DE3838798A1 (de) * 1988-11-17 1990-05-23 Ingelheim Peter Graf Von Injektor zur kombinierten nutzung
DE4238040A1 (de) * 1992-11-11 1994-05-19 Vdo Schindling Saugstrahlpumpe zum Fördern von Kraftstoff
DE4301762C2 (de) * 1993-01-23 1995-05-04 Daimler Benz Ag Tanksystem
DE4432968C2 (de) * 1994-09-16 2000-05-25 Mannesmann Vdo Ag Kraftstoff-Fördereinrichtung
DE19651652A1 (de) * 1996-12-12 1998-06-18 Bosch Gmbh Robert Kraftstoffbehälter
DE19830504B4 (de) * 1998-07-08 2005-12-22 Siemens Ag Für den Einsatz in einem Kraftstoffbehälter eines Kraftfahrzeuges vorgesehener Schwalltopf
DE19835157C1 (de) * 1998-08-04 2000-03-02 Daimler Chrysler Ag Saugstrahlpumpe
US6505644B2 (en) * 2000-06-09 2003-01-14 Delphi Technologies, Inc. Dual barrel jet fuel pump assembly for a fuel tank

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US86030A (en) * 1869-01-19 Alexander morton
US1784222A (en) * 1928-05-05 1930-12-09 Tridex Corp Suction atomizer
US5478209A (en) * 1994-07-11 1995-12-26 Pcf Group, Inc. Jet barrel and hose fitting insert for a jet pump
US5927338A (en) * 1996-04-18 1999-07-27 S.C. Johnson Commercial Markets, Inc. Mixing eductor

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110131789A1 (en) * 2008-09-01 2011-06-09 Inergy Automotive Systems Research (Societe Anonyme) Process for manufacturing a plastic fuel tank equipped with a pump
US8631556B2 (en) * 2008-09-01 2014-01-21 Inergy Automotive Systems Research (Société Anonyme) Process for manufacturing a plastic fuel tank equipped with a pump
US20100202898A1 (en) * 2009-02-09 2010-08-12 Robert Bosch Gmbh Jet pump assembly
US8459960B2 (en) * 2009-02-09 2013-06-11 Robert Bosch Gmbh Jet pump assembly
US20130047966A1 (en) * 2011-08-24 2013-02-28 Robert Bosch Gmbh Fuel supply system and anti-siphon jet pump
US8726886B2 (en) * 2011-08-24 2014-05-20 Robert Bosch Gmbh Fuel supply system and anti-siphon jet pump
US20160102683A1 (en) * 2014-10-13 2016-04-14 Denso Corporation Jet pump, manufacturing method of jet pump, and fuel supply device having jet pump
US10138906B2 (en) * 2014-10-13 2018-11-27 Denso Corporation Jet pump, manufacturing method of jet pump, and fuel supply device having jet pump
US11280353B2 (en) 2016-07-14 2022-03-22 Vitesco Technologies GmbH Suction jet pump with sealing of the injection mold installation opening by a metal ball fixed with plastic deformation
US11067044B2 (en) * 2016-09-16 2021-07-20 Vitesco Technologies GmbH Fluid conveying device
US11408383B2 (en) * 2018-11-20 2022-08-09 Walbro Llc Fuel pump assembly with electric motor fuel pump and fluid driven fuel pump
JP2020094512A (ja) * 2018-12-11 2020-06-18 富士電機株式会社 エジェクタ
US20230013738A1 (en) * 2021-07-14 2023-01-19 Hyundai Motor Company Dual Purge System for Vehicle
US11649789B2 (en) * 2021-07-14 2023-05-16 Hyundai Motor Company Dual purge system for vehicle

Also Published As

Publication number Publication date
EP2007988A1 (fr) 2008-12-31
WO2007115925A1 (fr) 2007-10-18
DE102006016515A1 (de) 2007-10-11

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Legal Events

Date Code Title Description
AS Assignment

Owner name: CONTINENTAL AUTOMOTIVE GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIENINGER, KLEMENS;SCHRODER, RALPH;TITTMANN, MICHAEL;REEL/FRAME:021644/0295;SIGNING DATES FROM 20080901 TO 20080915

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION