EP3592988B1 - Geschaltete saugstrahlpumpe - Google Patents

Geschaltete saugstrahlpumpe Download PDF

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Publication number
EP3592988B1
EP3592988B1 EP18712808.7A EP18712808A EP3592988B1 EP 3592988 B1 EP3592988 B1 EP 3592988B1 EP 18712808 A EP18712808 A EP 18712808A EP 3592988 B1 EP3592988 B1 EP 3592988B1
Authority
EP
European Patent Office
Prior art keywords
jet pump
valve body
suction jet
suction
nozzle
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.)
Active
Application number
EP18712808.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3592988A1 (de
Inventor
Christian Berding
Christoph LESON
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.)
Polytec Plastics Germany GmbH and Co KG
Original Assignee
Polytec Plastics Germany GmbH and Co KG
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 Polytec Plastics Germany GmbH and Co KG filed Critical Polytec Plastics Germany GmbH and Co KG
Publication of EP3592988A1 publication Critical patent/EP3592988A1/de
Application granted granted Critical
Publication of EP3592988B1 publication Critical patent/EP3592988B1/de
Active 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
    • 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
    • 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
    • F04F5/461—Adjustable nozzles
    • 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
    • F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
    • F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
    • F04F5/20—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating
    • F04F5/22—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating of multi-stage type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F01M13/022—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure using engine inlet suction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F01M2013/026—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure with pumps sucking air or blow-by gases from the crankcase
    • 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
    • F04F5/466—Arrangements of nozzles with a plurality of nozzles arranged in parallel

Definitions

  • the subject matter of the invention is a switched single-stage or multi-stage suction jet pump comprising a motive nozzle, one or more suction nozzles, a diffuser and a volume flow limiting valve.
  • the suction power of a conventional suction jet pump is regulated by the pressure applied to the propulsion jet nozzle.
  • this motive pressure is branched off from the boost pressure of the engine and depends on the respective engine load point. The higher the torque generated, the greater the boost pressure.
  • a suction jet pump is used to generate negative pressure in the crankcase or to ventilate the tank, sufficient suction power is required even at low boost pressures.
  • the suction power of the ejector pump does not have to increase in parallel with the increasing boost pressure. For this reason, it makes sense that the suction jet pump is throttled above a certain boost pressure. This is to prevent the internal combustion engine from diverting an unnecessarily large amount of air for combustion and reducing the power.
  • EP 3 020 935 A2 relates to a vehicle with an internal combustion engine, which has a crankcase and a charging device, with a crankcase ventilation device, which has an inertia-based oil separation device with at least one inertia-based Oil separator, a separated oil to the crankcase returning oil return and a suction jet pump which is driven with compressed air of the charging device and which generates a negative pressure to drive blow-by gas.
  • the suction jet pump is regulated and / or controlled by a control device.
  • the pump is throttled or switched off in the area of low boost pressure. In the high pressure range it is switched on to the maximum.
  • the motive flow of the ejector pump is only throttled at higher boost pressures.
  • the setting of the drive flow is self-regulating via the boost pressure DE 10 2015 208 906 A1 discloses a further suction jet pump which has an elastic valve body in the motive nozzle for self-regulation of the motive flow.
  • the disadvantage of the known solutions is that not the maximum available at the first nozzle of the suction jet pump Pressure is applied because the throttling takes place in front of the nozzle. Part of the energy used is always consumed at the throttle valve and is to be regarded as pure energy loss. Furthermore, the known systems are very large.
  • the object of the invention is now to integrate the throttle function directly into the motive nozzle of the suction jet pump.
  • the present invention therefore consists of a single-stage or multi-stage ejector pump comprising a motive nozzle 5, one or more suction nozzles in the suction area 2 and a diffuser 7, which is characterized in that the ejector pump in or immediately in front of the motive nozzle 5 is a device for Has reduction of the nozzle cross-section and thus to limit the propellant flow.
  • the invention consists of a single-stage or multi-stage ejector pump as in the Figs. 1 and 2 shown with a driving nozzle 5, a diffuser 7 and optionally further nozzles 6.
  • the overpressure area (1) which can be, for example, the boost pressure of a turbo engine.
  • the propellant fluid is accelerated through the propellant nozzle 5, so that the maximum speed is present after the nozzle.
  • This increases the dynamic pressure in this area.
  • the static pressure drops.
  • air is sucked in from the suction area 2 and then flows with the propellant air through the diffuser 7, where the flow is decelerated.
  • This can be used, for example, to generate a negative pressure in a crankcase or in a tank.
  • the total flow 3 can then be fed back to the intake air of the internal combustion engine (for example upstream of the compressor).
  • the device for limiting the driving flow has a valve body 4 in the overpressure area of the ejector pump, which in particular comprises an opening 8, the cross-sectional area of which is smaller than the cross-sectional area of the driving nozzle 5.
  • the drive flow limitation according to the invention is preferably achieved by a (spring-loaded) valve body 4 which is mounted directly in front of the drive nozzle 5 of the suction jet pump.
  • the suspension is preferably implemented in the valve body 4 by means of spring arms.
  • the valve body 4 lies, for example, on a support surface 11 in the body of the driving nozzle 5.
  • a compression or tension spring can also be used.
  • the spring element can continue to be pretensioned. This can be achieved, for example, by a hold-down device 10.
  • Fig. 1 it is shown that in the original state the valve body 4 is at a distance from the driving nozzle 5, so that a gap 9 is created between the valve body 4 and the body of the driving nozzle 5.
  • the driving fluid flows through the valve body 4 in this state via the gap 9.
  • the fluid can optionally flow through the opening in the valve body 4.
  • the motive current increases ( Fig. 2 ).
  • the motive flow and the Venturi effect result in the formation of the total flow 3.
  • the present invention provides a mass flow control with a defined valve characteristic map with a small installation space.
  • the valve body 4 in particular a spring plate, the flow cross section of the gap 9 between the Reduced overpressure area 1 and the underpressure area and thus regulates the propellant mass flow.
  • Another advantage of the present invention is that there is only one movable component, namely the valve body 4, in particular a spring plate.
  • the valve body 4 is used to regulate the cross section through which the flow passes, preferably in the form of a spring plate.
  • the spring plate can, for example, be installed under a defined pretension in the area of the overpressure 1 in order to clear the path of the gas flow through the gap 9. If the pressure gradient increases due to a stronger propulsion jet pressure, the valve body 4 moves towards the wall of the propulsion nozzle 5 up to the point that the gap 9 is completely closed.
  • the valve body 4 generates a pressure loss depending on the motive flow. If this pressure loss exceeds the spring force of the valve body, it moves in the direction of the motive nozzle 5 and slowly closes the gap 9. As the motive pressure increases, the motive flow decreases. The same applies to the suction flow in the suction area 2. At the end of the closing process, the valve body 4 seals approximately on the body of the drive nozzle 5, so that the drive fluid can only flow into the suction jet pump via the opening of the drive nozzle 5, as in FIG Fig. 2 shown. The drive flow is limited by the smaller opening in the valve body 4. However, due to the increase in density of the fluid at higher motive pressures, there is a further, but flat, increase in the motive flow. The suction flow also continues to increase.
  • the valve body 4 is preferably to be designed in such a way that the pressure loss is low, so that as far as possible the entire driving pressure can be used to drive the ejector pump.
  • Another embodiment of the present invention consists in the use of the above-defined device for crankcase ventilation of an internal combustion engine in a housing between a crankcase of a crankcase and an intake tract or the tank ventilation.

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)
  • Supercharger (AREA)
EP18712808.7A 2017-03-09 2018-03-07 Geschaltete saugstrahlpumpe Active EP3592988B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017203877.2A DE102017203877A1 (de) 2017-03-09 2017-03-09 Geschaltete Saugstrahlpumpe
PCT/EP2018/055584 WO2018162542A1 (de) 2017-03-09 2018-03-07 Geschaltete saugstrahlpumpe

Publications (2)

Publication Number Publication Date
EP3592988A1 EP3592988A1 (de) 2020-01-15
EP3592988B1 true EP3592988B1 (de) 2021-05-05

Family

ID=61763923

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18712808.7A Active EP3592988B1 (de) 2017-03-09 2018-03-07 Geschaltete saugstrahlpumpe

Country Status (5)

Country Link
US (1) US11022149B2 (zh)
EP (1) EP3592988B1 (zh)
CN (1) CN110352302B (zh)
DE (1) DE102017203877A1 (zh)
WO (1) WO2018162542A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202018104879U1 (de) * 2018-08-24 2018-09-25 Polytec Plastics Germany Gmbh & Co. Kg Tankentlüftung
DE102020105328B4 (de) 2020-02-28 2023-06-01 Polytec Plastics Germany Gmbh & Co. Kg Mehrstufige Saugstrahlpumpe für einen turboaufgeladenen Verbrennungsmotor, Turbolader für einen Verbrennungsmotor, Zylinderkopfhaube mit Ölabscheider
DE102020118330A1 (de) 2020-07-10 2022-01-13 Norma Germany Gmbh Düsenvorrichtung für eine Strahlpumpe und Strahlpumpe

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3635601A (en) * 1970-08-10 1972-01-18 Economics Lab Fail-safe multiple product aspirator
US3875922A (en) * 1973-04-18 1975-04-08 Jr Frank Kirmss Vapor injection system
DE4303319A1 (de) * 1993-02-05 1994-08-11 Putzmeister Maschf Vakuum-Pumpeinrichtung
US5667366A (en) * 1995-12-01 1997-09-16 Vernay Laboratories, Inc. Jet pump including flexible venturi
CN1272527C (zh) * 2001-09-18 2006-08-30 洋马株式会社 发动机的通气装置
JP4032875B2 (ja) * 2001-10-04 2008-01-16 株式会社デンソー エジェクタサイクル
DE10241302B4 (de) * 2002-09-04 2005-02-10 Carl Freudenberg Kg Verfahren und Vorrichtung zum Entlüften einer Brennkraftmaschine
DE112007000188A5 (de) * 2006-02-02 2009-01-15 Avl List Gmbh Kurbelgehäuseentlüftungssystem
US7849841B2 (en) * 2007-07-26 2010-12-14 Cummins Filtration Ip, Inc. Crankcase ventilation system with engine driven pumped scavenged oil
DE102008007204B4 (de) * 2008-02-01 2018-04-19 Robert Bosch Gmbh Saugstrahlpumpe
DE102010015030A1 (de) * 2009-10-08 2011-04-14 Daimler Ag Drucksteuerventil
DE202010001191U1 (de) * 2010-01-20 2011-05-26 REINZ-Dichtungs-GmbH, 89233 Ventil zur Steuerung eines Gasstromes, Flüssigkeitsabscheider, Entlüftungssystem sowie Verbrennungsmotor mit einem derartigen Ventil
ITMO20110237A1 (it) * 2011-09-19 2013-03-20 Enzo Landi Dispositivo economizzatore per attuatore pneumatico lineare e metodo per comandare detto attuatore pneumatico lineare
US9097149B2 (en) 2012-07-13 2015-08-04 Ford Global Technologies, Llc Aspirator for crankcase ventilation and vacuum generation
US9976457B2 (en) * 2012-09-07 2018-05-22 Miniature Precision Components, Inc. Turbo PCV valve
DE102013000236B4 (de) 2013-01-10 2016-01-28 Bayerische Motoren Werke Aktiengesellschaft Tankentlüftungsvorrichtung für ein Kraftfahrzeug mit einer Saugstrahlpumpe
DE112014001711T5 (de) * 2013-03-28 2015-12-10 Cummins Filtration Ip, Inc. Luft-Ölabscheider mit strahlverstärkter Impaktion und zugehöriges Verfahren
FR3008145B1 (fr) * 2013-07-04 2015-08-07 Pfeiffer Vacuum Sas Pompe a vide primaire seche
US10107240B2 (en) * 2014-04-04 2018-10-23 Dayco Ip Holdings, Llc Check valves and Venturi devices having the same
DE102014223288A1 (de) 2014-11-14 2016-05-19 Mahle International Gmbh Kurbelgehäuseentlüftungseinrichtung
DE102014223290A1 (de) * 2014-11-14 2016-05-19 Mahle International Gmbh Kurbelgehäuseentlüftungseinrichtung
DE102015208906A1 (de) 2015-05-13 2016-11-17 Mahle International Gmbh Saugstrahlpumpe mit variabler Düsengeometrie und Kurbelgehäuseentlüftungseinrichtung
DE102015217153A1 (de) * 2015-09-08 2017-03-09 Daimler Ag Zylinderkopfhaube und Verfahren zum Herstellen einer Zylinderkopfhaube

Also Published As

Publication number Publication date
WO2018162542A1 (de) 2018-09-13
EP3592988A1 (de) 2020-01-15
CN110352302A (zh) 2019-10-18
US20210131451A1 (en) 2021-05-06
CN110352302B (zh) 2021-02-02
DE102017203877A1 (de) 2018-09-13
US11022149B2 (en) 2021-06-01

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