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EP1283348B1 - Dispositif de fractionnement de carburant - Google Patents

Dispositif de fractionnement de carburant Download PDF

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Publication number
EP1283348B1
EP1283348B1 EP02015908A EP02015908A EP1283348B1 EP 1283348 B1 EP1283348 B1 EP 1283348B1 EP 02015908 A EP02015908 A EP 02015908A EP 02015908 A EP02015908 A EP 02015908A EP 1283348 B1 EP1283348 B1 EP 1283348B1
Authority
EP
European Patent Office
Prior art keywords
fuel
pump
housing
fractionating device
precipitator
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.)
Expired - Lifetime
Application number
EP02015908A
Other languages
German (de)
English (en)
Other versions
EP1283348A3 (fr
EP1283348A2 (fr
Inventor
Ralf Brünemann
Eberhard Holder
Roland Kemmler
Martin Matt
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.)
Mercedes Benz Group AG
Original Assignee
Daimler AG
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 Daimler AG filed Critical Daimler AG
Publication of EP1283348A2 publication Critical patent/EP1283348A2/fr
Publication of EP1283348A3 publication Critical patent/EP1283348A3/fr
Application granted granted Critical
Publication of EP1283348B1 publication Critical patent/EP1283348B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M33/00—Other apparatus for treating combustion-air, fuel or fuel-air mixture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • F02M1/16—Other means for enriching fuel-air mixture during starting; Priming cups; using different fuels for starting and normal operation
    • F02M1/165—Vaporizing light fractions from the fuel and condensing them for use during starting

Definitions

  • the invention relates to a fuel fractionating device for separating a low-boiling fuel fraction from a liquid fuel of an internal combustion engine according to the features specified in the preamble of claim 1.
  • Such a fuel fractionating device is known from DE 199 27 177 C1 known.
  • This fuel fractionator has an associated with the fuel tank exposed piping system with a pump, a heat exchanger, a separator and a memory, the pump sucks from a gas collection chamber in the fuel tank via a suction line, an air-fuel fraction mixture and the heat exchanger having a pressure line to the Separator feeds.
  • the fuel fractionator requires a considerable amount of space.
  • the invention has for its object to form a fuel fractionator of the type mentioned in that it requires a much smaller footprint and also shows a reduced noise behavior in the working mode.
  • a fuel fractionating device 1 consists essentially of a pump 2 and a pump drive 3 formed by an electric motor, a separator 4 and a storage 5 for low-boiling fuel.
  • the four functional elements have a cylindrical shape, are arranged coaxially with one another and, together with a housing 6 surrounding the pump 2 and the electric motor 3 at a distance and forming a sleeve, form a structural unit.
  • the separator 4 and the accumulator 5 fixedly connected to the electric motor protrude out of the housing 6.
  • the housing 6 results with the outer separator 4 and memory 5 an elongated slim design.
  • a mounting flange 7 In the upper end region of the housing 6 is a mounting flange 7, via which the assembly is attached to a fuel tank 8 in this perpendicular protruding.
  • This fuel tank 8 corresponds to the usual fuel tank of an internal combustion engine.
  • annular gap 9 is formed, in which in the lower region near the separator 6 of the housing 6, an annular fuel distributor 10 and an offset to this air distributor 11 are provided.
  • the electric motor 3 is surrounded directly by the fuel distributor 10, while the air distributor 11 rests on the housing 6 on the inside.
  • Fuel rail 10 and air manifold 11 are provided with small openings for the separate supply of fuel and air. Small air bubbles are formed which, together with the fuel, flow past a heat exchanger 12 arranged in the intermediate space 9 and heat up on the surface of the heat exchanger 12. The fuel-air mixture continues to flow past cooling fins 13, which protrude from the air pump 2. The fuel-air mixture is further heated. Here, the air bubbles accumulate with low-boiling fuel components.
  • the housing 6 has at its sleeve part 6a openings 15 which are arranged at the same height above the maximum fuel level in the fuel tank 8 to allow liquid residual fuel to flow to the outside can.
  • a mist eliminator 16 which is formed by circumferential ribs 17 in the intermediate space 9, on the one hand to a lying above the air pump 2 and a cavity 18 having cylindrical end portion 19 and on the other hand on the housing 6 are internally mounted, in the drainage direction mutually. By this labyrinth separation remaining residual air drops are retained.
  • the mixture flows through a line connection 20, the heat exchanger 12 and is thereby cooled, wherein the fuel vapor condenses.
  • the air transports the condensate via a line 21 into the separator 4 for the separation of air and condensate.
  • the air exits the separator 4 into a line 22 connecting the separator to the air distributor and containing a pressure valve 23.
  • the air passes through this pressure valve 23, relaxes to ambient pressure and then returns to the air manifold 11 in the intermediate space.
  • a compensation line 24 connects the upper part of the gap 9 with the vapor space 25 in the fuel tank 8. This ensures that the air pump 2 sucks no liquid fuel at the beginning of fractionation even when fully filled fuel tank 8.
  • the amount of fuel transported to the fuel fractionator is preferably diverted from the fuel return of the main fuel supply of the vehicle and may be regulated depending on the temperature of the fuel return.
  • the compression pressure of the air pump 2 can be controlled in response to the fuel temperature via the pressure valve 23.
  • the air-fuel mixture above the heat exchanger 12 can be additionally heated by an electric heater 26, which is fixed to the housing 6 and protrudes into the intermediate space 9.
  • the low-boiling fuel fraction is fed to the start and warm-up of the internal combustion engine.
  • the required injection pressure can in the form of a pressure pad by the Air pump 2 are generated or by means of an additional fuel pump.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Feeding And Controlling Fuel (AREA)

Claims (8)

  1. Dispositif de fractionnement de carburant (1) pour séparer une fraction de carburant à bas point d'ébullition d'un carburant liquide d'un moteur à combustion interne, comportant un réservoir de carburant (8) contenant le carburant liquide ainsi qu'un séparateur (4) pouvant délivrer un mélange de fraction de carburant aspiré et un accumulateur (5) pouvant délivrer la fraction de carburant, comportant en outre une pompe (2) aspirant les vapeurs de carburant et l'air comportant un entraînement de pompe (3),
    caractérisé en ce que
    la pompe (2) et l'entraînement de pompe (3) sont disposés fixement dans un boîtier (6) et sont disposés de façon à pouvoir être extraits dans le réservoir de carburant (8) formant conjointement avec le séparateur (4) et l'accumulateur (5) un module.
  2. Dispositif de fractionnement de carburant selon la revendication 1, caractérisé en ce que le boîtier (6) et au moins la pompe (2) coaxiale par rapport à celui-ci ainsi que l'entraînement de pompe (3) présentent une forme cylindrique, où le boîtier (6) entoure la pompe (2) et l'entraînement de pompe se trouvant dessous (3) pour former un espace de forme annulaire (9).
  3. Dispositif de fractionnement de carburant selon la revendication 2, caractérisé en ce que l'espace (9) présente dans sa zone sous-jacente à proximité du séparateur un distributeur de carburant annulaire (10) et un distributeur d'air annulaire (11) décalé par rapport à celui-ci avec respectivement de petites ouvertures.
  4. Dispositif de fractionnement de carburant selon au moins l'une des revendications précédentes, caractérisé en ce que la pompe (2) est munie à sa périphérie d'ailettes de refroidissement (13) faisant saillie dans l'espace (9) et en ce qu'un échangeur de chaleur (12) est disposé dans cet espace (9) entre le boîtier (6) et l'entraînement de pompe (3).
  5. Dispositif de fractionnement de carburant selon au moins l'une des revendications précédentes, caractérisé en ce qu'une séparation en forme de labyrinthe (16) formée par les ailettes (17) est prévue dans l'espace (9) entre la pompe (2) et la zone opposée au séparateur se trouvant au-dessus du boîtier (6).
  6. Dispositif de fractionnement de carburant selon au moins l'une des revendications, caractérisé en ce que les ailettes (17) sont montées en tant qu'ailettes de circulation dans la direction d'égouttage alternativement sur la paroi interne dans le boîtier (6) et sur la paroi extérieure dans la partie terminale (19) se trouvant au-dessus de la pompe (2).
  7. Dispositif de fractionnement de carburant selon au moins l'une des revendications précédentes, caractérisé en ce que le boîtier (6) est muni d'ouvertures à niveau (15) se trouvant dans le réservoir de carburant (8) au-dessus de l'état de remplissage de carburant maximal.
  8. Dispositif de fractionnement de carburant selon au moins l'une des revendications précédentes, caractérisé en ce que le boîtier (6) présente à son extrémité opposée au séparateur (4) une collerette de fixation (7), par l'intermédiaire de laquelle le boîtier (6) avec le séparateur (4) et l'accumulateur (5) est fixé dans le réservoir de carburant (8) faisant saillie perpendiculairement dans celui-ci.
EP02015908A 2001-08-10 2002-07-17 Dispositif de fractionnement de carburant Expired - Lifetime EP1283348B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10139527 2001-08-10
DE10139527A DE10139527A1 (de) 2001-08-10 2001-08-10 Kraftstofffraktioniereinrichtung

Publications (3)

Publication Number Publication Date
EP1283348A2 EP1283348A2 (fr) 2003-02-12
EP1283348A3 EP1283348A3 (fr) 2007-06-13
EP1283348B1 true EP1283348B1 (fr) 2008-06-04

Family

ID=7695154

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02015908A Expired - Lifetime EP1283348B1 (fr) 2001-08-10 2002-07-17 Dispositif de fractionnement de carburant

Country Status (4)

Country Link
US (1) US6691684B1 (fr)
EP (1) EP1283348B1 (fr)
JP (1) JP4180858B2 (fr)
DE (2) DE10139527A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9611780B2 (en) * 2015-07-21 2017-04-04 GM Global Technology Operations LLC Systems and methods for removing fuel from engine oil
JP6486798B2 (ja) * 2015-08-28 2019-03-20 本田技研工業株式会社 燃料貯留装置
US9776624B1 (en) * 2016-05-04 2017-10-03 Ford Global Technologies, Llc Method and system for engine control

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2865355A (en) * 1955-12-14 1958-12-23 California Research Corp Internal combustion engine fuel system
US3794000A (en) * 1971-09-17 1974-02-26 Ethyl Corp Fuel system for separating volatile fuel from gasoline
US4876989A (en) * 1988-05-10 1989-10-31 Technology Development Associates, Inc. Enhanced performance of alcohol fueled engine during cold conditions
US5019120A (en) * 1989-02-02 1991-05-28 Lewis Alfred M Vapor-accelerated combustion fuel system
US5546908A (en) * 1994-01-07 1996-08-20 Stokes; Richard A. Plural fuel system for internal combustion engine
DE19927177C1 (de) * 1999-06-15 2000-07-13 Daimler Chrysler Ag Kraftstofffraktioniereinrichtung
DE19927176C1 (de) * 1999-06-15 2000-11-02 Daimler Chrysler Ag Kraftstoffversorgungsanlage

Also Published As

Publication number Publication date
DE10139527A1 (de) 2003-02-20
US20040025806A1 (en) 2004-02-12
DE50212343D1 (de) 2008-07-17
EP1283348A3 (fr) 2007-06-13
US6691684B1 (en) 2004-02-17
EP1283348A2 (fr) 2003-02-12
JP2003074437A (ja) 2003-03-12
JP4180858B2 (ja) 2008-11-12

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