EP2399030A1 - Dispositif de limitation de débit d'une pompe et ensemble pompe muni d'un tel dispositif - Google Patents

Dispositif de limitation de débit d'une pompe et ensemble pompe muni d'un tel dispositif

Info

Publication number
EP2399030A1
EP2399030A1 EP10702676A EP10702676A EP2399030A1 EP 2399030 A1 EP2399030 A1 EP 2399030A1 EP 10702676 A EP10702676 A EP 10702676A EP 10702676 A EP10702676 A EP 10702676A EP 2399030 A1 EP2399030 A1 EP 2399030A1
Authority
EP
European Patent Office
Prior art keywords
pump
throttle
inlet channel
flow
flow rate
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.)
Granted
Application number
EP10702676A
Other languages
German (de)
English (en)
Other versions
EP2399030B1 (fr
Inventor
Christian Langenbach
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 EP2399030A1 publication Critical patent/EP2399030A1/fr
Application granted granted Critical
Publication of EP2399030B1 publication Critical patent/EP2399030B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
    • F04F5/10—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids
    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/08—Combinations of two or more pumps the pumps being of different types
    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/08—Combinations of two or more pumps the pumps being of different types
    • F04B23/14—Combinations of two or more pumps the pumps being of different types at least one pump being of the non-positive-displacement type
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/24—Bypassing

Definitions

  • the invention relates to a device for
  • the invention relates to the field of fuel injection systems of air compressing, self-igniting internal combustion engines.
  • a high-pressure pump for a fuel injection device of an internal combustion engine has at least one pump element, which has a driven in a lifting movement, in a cylinder bore of a pump housing part slidably guided pump piston which limits a pump working space in the cylinder bore.
  • the pump working space can be filled with fuel via a suction valve during the suction stroke of the pump piston.
  • the pump working chamber is connected via a running in the pump housing fuel inlet channel with a feed pump.
  • Flow rate limitation with the features of claim 1 and the pump assembly according to the invention with the features of claim 11 have the advantage that an adapted to the needs flow rate limitation is ensured. Specifically, excessive pressure rise at the outlet of the pump can be prevented or at least reduced.
  • the throttle is oriented at least approximately on an axis of the inlet channel, along which the inlet channel extends at least between the outlet point and its outlet side. Furthermore, it is advantageous that an inlet of the throttle is arranged at least substantially in the region of the outlet point in the inlet channel. Due to the orientation of the throttle on the axis of the inlet channel, an optimal flow of the Throttle be enabled by the inlet channel. Via the diversion channel, which opens laterally into the inlet channel, a transverse flow can be generated, whereby a deliberate deterioration of the throttle coefficient of the throttle can be achieved. In this case, a flow separation within the throttle can be achieved due to the cross flow.
  • the flow separation can increase advantageously with increasing Abberichtmenge which is introduced via the Ab jurykanal at the confluence point in the inlet channel.
  • Due to the arrangement of the throttle in the region of the discharge point a particularly effective influencing of the throttle coefficient via the crossflow from the discharge channel is possible.
  • a desired deterioration of the throttle coefficient can be achieved in a particularly effective manner.
  • the throttle may be arranged at a suitable distance close to the discharge point of the diversion channel.
  • a flow direction of the diversion channel at the outlet point is different from a flow direction of the inlet channel at the throttle.
  • the flow direction of the Abgreskanals at the confluence is also advantageous.
  • Flow direction of the inlet channel at the throttle at least approximately includes an angle, said angle is in a range of about 40 ° to about 90 °.
  • the overflow valve is designed as a pressure control valve. It is further advantageous that the pressure control valve controls a Ab bruisemenge through the Ab tenuous in response to a pressure difference between the input side of the Ab tenuitzals and the output side of the Ab tenuous in response to a pressure difference between the input side of the Ab tenuitzals and the output side of the Ab tenuous in response to a pressure difference between the input side of the Ab tenukanals and the output side of the Ab tenukanals.
  • the diversion channel at its inlet and outlet sides and / or the inlet channel at the outlet point are designed such that hydraulic losses at the outlet point are avoided.
  • the throttle is designed so that an increasing flow separation occurs within the throttle with increasing Ab horrmenge, which flows through the Ab horrkanal in the inlet channel as a cross-flow.
  • the throttle may be configured in an advantageous manner as a cylindrical bore. The throttle can be integrated or installed in a suitable manner in the inlet channel, for example by drilling or pressing.
  • FIG. 1 shows a pump arrangement with a device for flow rate limitation in a schematic representation according to an embodiment of the invention in a state with a relatively low Ab Georgge and
  • the 1 shows a pump arrangement 1 with a device 2 for restricting the flow rate to a pump 3.
  • the pump 3 is part of the pump arrangement 1, but no part of the device 2.
  • Flow rate limitation and the pump assembly 1 with this device 2 can be used in particular for a fuel injection system of air-compressing, self-igniting internal combustion engines.
  • the pump 3 is configured as a suction-throttled feed pump.
  • a preferred use of the pump assembly 1 and the device 2 is for a feed pump for supplying fuel to a high-pressure pump of a fuel injection system with a common rail that stores diesel fuel under high pressure.
  • the inventive device 2 for However, flow rate limitation and the pump arrangement 1 according to the invention are also suitable for other applications.
  • the device 2 has an inlet channel 4 on the suction side of the pump 3, which has a throttle 5, and a discharge channel 6 also on the suction side of the pump 3, in which an overflow valve 7 is arranged, which is designed as a pressure control valve 7.
  • the inlet channel 4 is connected at its output side 8 to an inlet 9 of the pump 3.
  • the diversion channel 6 is connected at its input side 10 by means of a fuel line 11 to an outlet 12 of the pump 3.
  • the Abêtkanal 6 branches off from the fuel line, which leads, for example, to a high pressure pump of a fuel injection system.
  • the discharge channel 6 opens at its outlet side 13 at an outlet point 14 laterally into the inlet channel 4.
  • the throttle 5 is arranged between the discharge point 14 and the output side 8 of the inlet channel 4 in the inlet channel 4.
  • the inlet channel 4 has an axis 20.
  • the inlet channel 4 extends along the axis 20.
  • the inlet channel 4 extends between the outlet point 14 and its outlet side 8 along the axis 20.
  • the throttle 5 is aligned with the axis 20 of the inlet channel 4.
  • the throttle 5 is configured by a cylindrical bore.
  • a flow direction 21 of the inlet channel 4 on the throttle 5 is parallel to the axis 20 of the inlet channel 4.
  • the diversion channel 6 has an axis 22 on its output side 13.
  • a flow direction 23 of the diversion channel 6 at the point of discharge 14 is parallel to the axis 22 oriented.
  • the axis 22 of the Abgreskanals 6 includes with the axis 20 of the inlet channel 4 at the discharge point 14 an angle 24 of about 90 °.
  • the flow direction 23 of the diversion channel 6 at the point of discharge 14 is different from the flow direction 21 of the inlet channel 4 at the throttle 5.
  • An inlet 25 of the throttle 5 is located in the region of the discharge point 14 in the inlet channel. 4
  • a situation is shown in Fig. 1, in which no or only a relatively small Abêtmenge occurs.
  • Fig. 2 shows the pump assembly 1 shown in Fig. 1 with the means 2 for limiting the flow rate at the pump
  • the pressure control valve 7 controls the Abersonmenge through the Ab tenukanal 6 in response to a pressure difference between the input side 10 of the Abersonkanals 6 and the Output side 13 of the Ab tenukanals 6.
  • the pressure difference at the pressure control valve 7 is relatively large. This can be caused by a consumer downstream of the pump arrangement 1, in particular a high-pressure pump, polling a relatively small quantity of fuel. This results in the output 12 of the pump 3 to a relatively large pressure, which thus also prevails on the input side 10 of the Abersonkanals 6 and acts on the pressure control valve 7.
  • this causes the Abgresung a relatively large Abberichtmenge via the Ab tenukanal 6, which flows on the output side 13 as a cross-flow in the inlet channel 4.
  • This transverse flow is illustrated schematically in FIG. 2 by a flow pattern 27.
  • the diversion channel 6, in particular the outlet side 13 of the diversion channel 6, and the inlet channel 4, in particular the region of the inlet channel 4 at the outlet point 14, are designed so that hydraulic losses at the point of discharge 14 are avoided.
  • the crossflow added via the outlet channel 6 of the main flow in the inlet channel 4 can thereby flow into the inlet channel 4 substantially without any loss. Due to the superimposition of the cross flow to the main flow, there is a flow separation in the throttle 5.
  • the throttle 5 is designed so that with increasing cross flow, that is, with increasing Abêtmenge that flows through the discharge channel 6 in the inlet channel 4, an increasing
  • the pump assembly 1 can be used for a high-pressure pump of a fuel injection system with a common rail, the pump 3 as a mechanical prefeed pump, such as external gear pump used.
  • the pump 3 preferably operates largely in the suction-throttled operation in order to limit the delivery rate and thus the pressure which is established via the pressure regulating valve 7.
  • fuel can be conveyed out of a tank via the inlet channel 4, wherein the amount of diversion via the outlet channel 6 is likewise added to the inlet channel 4.
  • the throttle coefficient of the throttle 5 serving as intake throttle is changed such that the throttle 5 represents a greater resistance, whereby the pressure increase upstream of the pressure control valve 7 on the pump 3 less fails.
  • the flow direction 23 of the diversion channel 6 differs from the flow direction 21 of the inlet channel 4.
  • the two flow directions 21, 23 may enclose an angle from a range of about 40 ° to about 90 °.
  • the inlet via the inlet channel 4 is optimally carried out, since the throttle 5 is located on the axis 20 of the inlet channel 4 and is aligned with the axis 20.
  • the inlet from the diversion channel 6, takes place under a flow direction 23 swung out of the flow direction 21.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un dispositif (2) de limitation de débit d'une pompe (3), en particulier d'une pompe d'alimentation à étranglement côté aspiration pour des systèmes d'injection de combustible de moteurs à combustion interne, à auto-allumage et à compression d'air. Le dispositif présente un canal d'amenée (4) sur le côté aspiration de la pompe (3), relié, sur un côté de sortie (8), à une entrée (9) de pompe (3), un canal de décharge (6), pouvant être relié par son côté d'entrée (10) au moins indirectement à une sortie (12) de la pompe (3) et débouchant par son côté de sortie (13) en un point d'embouchure (14) latéralement dans le canal d'amenée (4), ainsi qu'une soupape régulatrice de pression (7) agencée dans le canal de décharge (6). En outre, un élément d'étranglement (5) est agencé dans le canal d'amenée (4) entre le point d'embouchure (14) et le côté de sortie (8) du canal d'amenée (4). Un débit de décharge du canal de décharge (6) provoque un écoulement transversal au point d'embouchure (14), surmonté d'un écoulement principal à travers le canal d'amenée (4). On obtient ainsi un écoulement latéral dans l'élément d'étranglement (5), ce qui permet de réduire le diamètre d'étranglement effectif. Une différence de pression donnée au niveau de la pompe (3) peut ainsi être réduite. En outre, l'invention concerne un ensemble pompe (1) muni de la pompe (3) et du dispositif (2) de limitation de débit.
EP10702676.7A 2009-02-18 2010-02-04 Dispositif de limitation de débit d'une pompe et ensemble pompe muni d'un tel dispositif Active EP2399030B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009000943A DE102009000943A1 (de) 2009-02-18 2009-02-18 Einrichtung zur Durchflussmengenbegrenzung an einer Pumpe und Pumpenanordnung mit solch einer Einrichtung
PCT/EP2010/051359 WO2010094574A1 (fr) 2009-02-18 2010-02-04 Dispositif de limitation de débit d'une pompe et ensemble pompe muni d'un tel dispositif

Publications (2)

Publication Number Publication Date
EP2399030A1 true EP2399030A1 (fr) 2011-12-28
EP2399030B1 EP2399030B1 (fr) 2019-06-05

Family

ID=42102225

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10702676.7A Active EP2399030B1 (fr) 2009-02-18 2010-02-04 Dispositif de limitation de débit d'une pompe et ensemble pompe muni d'un tel dispositif

Country Status (4)

Country Link
EP (1) EP2399030B1 (fr)
CN (1) CN102325996B (fr)
DE (1) DE102009000943A1 (fr)
WO (1) WO2010094574A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011010329A1 (de) 2011-02-04 2012-08-09 Inotec Glienke & Glienke Gbr (Vertretungsberechtigte Gesellschafter: Peter O. Glienke, 10557 Berlin; Isolde M. Glienke, 10557 Berlin) Wasser speicherndes und abgebendes organisch basiertes Kompositmaterial sowie dessen Herstellung und Anwendung
US20230358174A1 (en) * 2022-05-06 2023-11-09 Hamilton Sundstrand Corporation Aircraft fuel pumping system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1350095A (en) * 1918-03-11 1920-08-17 Surface Comb Co Inc Method of and apparatus for unloading pumps
GB1203377A (en) * 1967-11-13 1970-08-26 Bendix Corp Fluid by-pass valve mechanism including jet fluid pump means
GB1410981A (en) * 1972-01-06 1975-10-22 Plessey Co Ltd Systems for the metered supply of liquids
FR2551495B1 (fr) * 1983-09-07 1985-11-08 Snecma Procede et dispositif pour reduire l'auto-echauffement d'un circuit de carburant de turbomachine
DE3418384A1 (de) * 1984-05-17 1985-11-21 Peter Graf von 8000 München Ingelheim Vorrichtungen zur drehzahlunabhaengigen foerderstromregulierung mit energierueckgewinn bei konstantpumpen - insbesondere bei schmieroelpumpen
US20030136371A1 (en) * 2001-08-09 2003-07-24 David Killion Energy efficient fluid pump system
DE102004028999A1 (de) 2004-06-16 2006-01-05 Robert Bosch Gmbh Hochdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine
US20080273992A1 (en) * 2007-05-03 2008-11-06 Metaldyne Company Llc. Cavitation-deterring energy-efficient fluid pump system and method of operation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010094574A1 *

Also Published As

Publication number Publication date
EP2399030B1 (fr) 2019-06-05
CN102325996B (zh) 2016-02-03
WO2010094574A1 (fr) 2010-08-26
DE102009000943A1 (de) 2010-08-19
CN102325996A (zh) 2012-01-18

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