EP3592988A1 - Pompe à jet aspirant commutée - Google Patents

Pompe à jet aspirant commutée

Info

Publication number
EP3592988A1
EP3592988A1 EP18712808.7A EP18712808A EP3592988A1 EP 3592988 A1 EP3592988 A1 EP 3592988A1 EP 18712808 A EP18712808 A EP 18712808A EP 3592988 A1 EP3592988 A1 EP 3592988A1
Authority
EP
European Patent Office
Prior art keywords
jet pump
suction
suction jet
valve body
cross
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
EP18712808.7A
Other languages
German (de)
English (en)
Other versions
EP3592988B1 (fr
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/fr
Application granted granted Critical
Publication of EP3592988B1 publication Critical patent/EP3592988B1/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
    • 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
    • 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
    • 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 invention relates to a switched single-stage or multi-stage suction jet pump comprising a motive nozzle, one or more suction nozzles, a diffuser and a flow control valve.
  • the suction power of a conventional suction jet pump is regulated by the pressure applied to the jet nozzle.
  • this driving pressure is diverted 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 for tank ventilation, sufficient suction power is required even at low boost pressures.
  • the suction power of the suction jet pump usually does not have to increase in parallel to the increasing boost pressure. For this reason, it makes sense that the suction jet pump is throttled from a certain boost pressure. This is to prevent the engine from unnecessarily diverting much air for combustion and reducing the power.
  • EP 3 020 935 A2 relates to a vehicle having an internal combustion engine having a crankcase and a supercharger, with a crankcase ventilation device comprising an inertia-based oil separator having at least one inertia-based one Oil separator, a separated oil to the crankcase recirculating oil return and a suction jet pump which is driven with compressed air of the supercharger and which generates a negative pressure to drive blow-by gas. It is essential here that the suction jet pump is controlled and / or controlled by a control device. Here, the pump is throttled or switched off in the low boost pressure range. In the area of high pressure it is switched on maximally.
  • the disadvantage of the known solutions is that at the first nozzle of the ejector not the maximum available 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 can be considered as pure energy loss. Furthermore, the known systems build up very large.
  • the object of the invention now consists in the integration of the throttle function directly into the motive nozzle of the ejector.
  • the present invention consists of a single-stage or multi-stage suction jet pump comprising a motive nozzle 5, one or more suction nozzles in the intake 2 and a diffuser 7, which is characterized in that the suction jet pump in or immediately in front of the motive nozzle 5, a device for Reduction of the nozzle cross section and thus has to limit the drive current.
  • Fig. 1 shows the invention with a self-springing valve body in unthrottled switching position.
  • Fig. 2 shows the invention with a self-resilient valve body in a throttled switching position.
  • Fig. 3 shows a possible curve of the driving and suction flow in response to the applied driving pressure.
  • the invention consists of a single-stage or multi-stage suction jet pump as shown in FIGS. 1 and 2 with a motive nozzle 5, a diffuser 7 and optionally further nozzles 6.
  • the overpressure area (1) which, for example, the boost pressure of a Turbomotors can be. Due to the overpressure, the driving fluid is accelerated by the driving nozzle 5, so that after the nozzle, the maximum speed is present. This increases the dynamic pressure in this area. For reasons of energy conservation, the static pressure drops. As a result, air is sucked in from the suction region 2 and then flows with the blowing air through the diffuser 7, where the flow is decelerated. This can be used, for example, to generate a vacuum 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, before the compressor).
  • the device for limiting the blowing current (volume flow limiting valve) in the overpressure region of the suction jet pump has a valve body 4, which in particular comprises an opening 8 whose cross-sectional area is smaller than the cross-sectional area of the motive nozzle 5.
  • the drive current limiting according to the invention is preferably achieved by a (sprung) valve body 4, which is mounted directly in front of the drive nozzle 5 of the suction jet pump.
  • the suspension is preferably realized in the valve body 4 by spring arms.
  • the valve body 4 is for example on a support surface 11 in the body of the motive nozzle 5.
  • a compression or tension spring can be used.
  • the spring element can be further biased. This can be realized for example by a hold-down 10.
  • Fig. 1 it is shown that in the original state, the valve body 4 has a distance from the motive nozzle 5, so that a gap 9 between the valve body 4 and the body of the motive nozzle 5 is formed.
  • the driving fluid flows through the valve body 4 in this state via the gap 9. Furthermore, the fluid may optionally flow through the opening in the valve body 4.
  • the driving current increases (FIG. 2).
  • the drive current and the Venturi effect lead to the formation of the total current 3.
  • a mass flow control with a defined valve map is made available in a small space.
  • the valve body 4 in particular a spring plate of the flow-through cross-section of the gap 9 between the Reduced pressure range 1 and the negative pressure range and thus regulated the motive mass flow.
  • Another advantage of the present invention is that only one movable component, namely the valve body 4, in particular a spring plate is present.
  • the valve body 4 serves to regulate the flow-through cross-section, preferably in the form of a spring plate.
  • the spring plate can be installed, for example in the region of the overpressure 1 under a defined bias to release the path of the gas flow through the gap 9. If the pressure gradient increases due to a stronger propulsion jet pressure, then the valve body 4 moves toward the wall of the motive nozzle 5 up to the point that the gap 9 is completely closed.
  • the valve body 4 generates a pressure loss depending on the drive current. If this pressure loss exceeds the spring force of the valve body, then it moves in the direction of the motive nozzle 5 and slowly closes the gap 9. As the motive pressure increases, the motive current decreases. The same applies to the suction flow in the intake 2. At the end of the closing of the valve body 4 seals on the body of the motive nozzle 5 approximately, so that the driving fluid can flow only through the opening of the motive nozzle 5 in the ejector, as in Fig. 2nd represented. Due to the smaller opening in the valve body 4, the drive current is limited. However, due to the increase in density of the fluid at higher driving pressures, there is a further, but shallow, increase in the driving current. The suction flow also continues to increase.
  • the valve body 4 is preferably to be designed so that the pressure loss is low, so that as far as possible the complete driving pressure can be used to drive the suction jet pump.
  • a further embodiment of the present invention is 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)

Abstract

La présente invention concerne une pompe à jet aspirant à un ou à plusieurs étages, comprenant : une tuyère d'injection (5) ; une ou plusieurs tuyères d'aspiration (2) ; un diffuseur (7) ; et une soupape de limitation de débit dans ou immédiatement devant ladite tuyère d'injection. La soupape de limitation de débit comporte un corps de soupape (4), dans la zone de surpression (1) de la pompe à jet aspirant, qui comporte une ouverture (8) dont la section transversale est inférieure à la section transversale de la tuyère d'injection (5). Le corps de soupape recouvre au moins une autre ouverture allongée (9), qui, lors d'une différence de pression croissante entre la zone de surpression (1) et la zone d'aspiration (2), libère initialement la section transversale de l'ouverture allongée (9), puis, lors d'une chute de pression défini, commute ladite section transversale de l'ouverture allongée (9) et le corps de soupape (4) réduit ou ferme ladite section transversale de l'ouverture allongée (9) de telle sorte que, même lors d'une différence de pression toujours croissante, le débit volumique à travers l'ouverture (8) est limité à un niveau défini.
EP18712808.7A 2017-03-09 2018-03-07 Pompe à jet aspirant commutée Active EP3592988B1 (fr)

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 (fr) 2017-03-09 2018-03-07 Pompe à jet aspirant commutée

Publications (2)

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

Family

ID=61763923

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18712808.7A Active EP3592988B1 (fr) 2017-03-09 2018-03-07 Pompe à jet aspirant commutée

Country Status (5)

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

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
WO2003025354A1 (fr) * 2001-09-18 2003-03-27 Yanmar Co.,Ltd. Aerateur de moteur
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
WO2007087663A2 (fr) * 2006-02-02 2007-08-09 Avl List Gmbh Système de ventilation de boîtier de vilebrequin
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
WO2014160870A1 (fr) * 2013-03-28 2014-10-02 Cummins Filtration Ip, Inc. Séparateur air-huile avec un impact amélioré par projection et procédé associé
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
DE102014223290A1 (de) * 2014-11-14 2016-05-19 Mahle International Gmbh Kurbelgehäuseentlüftungseinrichtung
DE102014223288A1 (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 (fr) 2018-09-13
CN110352302A (zh) 2019-10-18
US20210131451A1 (en) 2021-05-06
US11022149B2 (en) 2021-06-01
CN110352302B (zh) 2021-02-02
EP3592988B1 (fr) 2021-05-05
DE102017203877A1 (de) 2018-09-13

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