WO1997022797A1 - Dispositif d'alimentation en carburant d'un moteur a combustion interne - Google Patents

Dispositif d'alimentation en carburant d'un moteur a combustion interne Download PDF

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Publication number
WO1997022797A1
WO1997022797A1 PCT/EP1996/005556 EP9605556W WO9722797A1 WO 1997022797 A1 WO1997022797 A1 WO 1997022797A1 EP 9605556 W EP9605556 W EP 9605556W WO 9722797 A1 WO9722797 A1 WO 9722797A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
fuel tank
switch
float
internal combustion
Prior art date
Application number
PCT/EP1996/005556
Other languages
German (de)
English (en)
Inventor
Johann Haderer
Ernst-Olav Pagel
Johann Attenni
Original Assignee
Audi 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 Audi Ag filed Critical Audi Ag
Publication of WO1997022797A1 publication Critical patent/WO1997022797A1/fr

Links

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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0076—Details of the fuel feeding system related to the fuel tank
    • F02M37/0082—Devices inside the fuel tank other than fuel pumps or filters
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/20—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines characterised by means for preventing vapour lock
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D33/00—Controlling delivery of fuel or combustion-air, not otherwise provided for
    • F02D33/003—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge
    • F02D33/006—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge depending on engine operating conditions, e.g. start, stop or ambient conditions
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel

Definitions

  • the invention relates to a device for supplying a gasoline engine with fuel, in particular in a motor vehicle, according to the preamble of claim 1
  • stowage containers arranged in the fuel tank are used, into which fuel is pumped via a preliminary pump or jet pumps and from which a main pump supplies the fuel to the internal combustion engine.
  • the main pump can also be arranged on the engine side. It is a fuel pump that draws in from several container sections also known (cf. Japanese patent abstract 62-83222), in the secondary line branching from the main suction line, to provide a float valve in the mouth region in the distant container section which closes when the container section is empty and thus prevents air from being sucked in from this container section
  • the object of the invention is to propose a device of the generic type which, to an even greater extent, excludes malfunctions in the fuel metering system of the internal combustion engine. This object is achieved according to the invention with the characterizing features of patent claim 1. Advantageous and expedient further developments of the invention can be found in the further patent claims
  • means are proposed which prevent further emptying when the fuel tank is emptied.
  • this avoids that, for example, due to carelessness of the operator of the motor vehicle when the fuel tank is almost completely emptied, air-permeated fuel or only Air is introduced into the fuel pump, into the fuel feed line and, if necessary, into the fuel metering system. It is consciously accepted that a small, defined amount of fuel remains in the fuel tank, this remaining amount being used in the fuel tank
  • the supply system is coordinated in such a way that a bubble-free fuel demand occurs under all operating conditions
  • the means for preventing complete emptying of the fuel tank can comprise an electrical switch which, in the case of the defined emptying or at a defined fill level in the fuel tank, controls a control unit for stopping the internal combustion engine or the fuel pump.
  • the switch can preferably be a float switch , in particular a float-controlled reed switch, by means of which a defined emptying of the fuel tank can be reliably recognized and the prevention of further emptying can be controlled.
  • the switch can also be an electromagnetic valve in a fuel supply line, for example the suction line or the flow line control from the fuel pump to the fuel metering system of the internal combustion engine
  • a structurally particularly simple embodiment can consist of providing one or more float valves which, when the drain is defined, close a fuel supply line, in particular the intake lines connected to the fuel pump. It is particularly expedient if an additional device is used to avoid unsteady valve states device is provided which, when the float valve or valves are closed for the first time, keep them in the closed state, for example in order to avoid constant opening and closing of the float valves in the event of larger fuel fluctuations
  • the additional device can be, in a particularly simple manner, a holding magnet acting on the movable valve element or an additional locking device, which is controlled by a second float, which releases this locking device again when the fuel level is above the defined residual amount
  • warning device which, by means of a preferred acoustic signal, indicates to the operator that the motor vehicle should be parked within a distance of, for example, one kilometer due to lack of fuel and imminent engine downtime
  • This warning device should be activated shortly before the fuel request is stopped, irrespective of a customary full level indicator and any visual request for refueling
  • the return line should furthermore be introduced into the upper region and preferably tangentially into the storage tank.
  • the fuel which may be relatively strongly heated, is then removed from the return line from the open top Storage holder reeled out and thus ensured that cooler fuel is sucked in from the fuel tank or from the bottom area of the storage holder.
  • the returning fuel is available for supplying fuel to the internal combustion engine
  • the primary refueling of the stowage container ensures that after emptying the fuel tank and refueling only a small amount of fuel (eg from a reserve canister), a reliable fuel supply is immediately available
  • 1 shows a fuel tank for a motor vehicle with a device for supplying an internal combustion engine with fuel and means which prevent further emptying of the fuel tank in the case of a defined emptying
  • 2 shows the construction of a float valve as a means of preventing the fuel tank from being completely emptied
  • FIG. 3 shows a further construction of a lever-controlled float valve with a locking device
  • Fig. 1 denotes a fuel tank for a motor vehicle, on the bottom 12 of which is attached an upwardly open storage container 14.
  • a first fuel pump 16 is inserted, which draws fuel from the bottom of the storage holder 14 via a suction line 18 and requests this via a feed line 20 to a fuel metering system, not shown, of the internal combustion engine of the motor vehicle.
  • the fuel pump 16 could, however, also on the internal combustion engine or be arranged outside the fuel tank
  • a fuel supply pump 22 is fastened outside the storage tank 14 or in a second chamber attached to it, which draws fuel from the bottom 12 of the fuel tank 10 via a suction line 24 and feeds it from above into the storage tank 14 and via a feed line 26 Branch line 27 in the bottom area thereof
  • a suction jet pump 30 is arranged at the mouth area of the branch line 27, via which both the required fuel and a suction point 32 open to the fuel tank 10 are fed from the fuel tank 10 into the storage container 14
  • a return line 28 flows tangentially into the upper region of the cylindrical, upwardly open storage container 14
  • a float-controlled reed switch 34 is arranged in the storage holder 14, which emits a first electrical signal when the fuel level drops to a first level I and, when it drops further to an underlying level II, sends a second signal to an electronic control device 36
  • the reed Switch 34 has, in a known manner, a hermetically sealed switch part 38 with the electrical contacts (not shown), around which an annular float 40 with a magnetic ring (not shown) is arranged, so that when the Fuel level resulting displacement of the float 40, the switch part 38 generates corresponding signals
  • the first fuel pump 16 and the preliminary pump 22 are controlled via an electrical line 42 via the control device 36.
  • the electronic control device 36 is connected via a further line 44 to an engine control unit (not shown), via a line 46 An acoustic warning 48 and connected via line 50 to an electromagnetic shut-off valve 52 arranged in the fuel feed line 20.
  • the electrical signals of the reed switch 34 are transmitted via a further line 54
  • the fuel pump 16 (which can also be arranged on the engine side) requests the fuel from the storage container 14 via suction line 18 and the feed line 20 with the shut-off valve 52 open to the fuel metering system of the internal combustion engine
  • Storage holder 14 is filled up to its upper edge on the one hand due to the fuel demanded by the pre-pump 22, the fuel, which may have been heated, emerging from the return line 28 being flushed upward
  • the pre-pump 22 can no longer request fuel into the storage container 14. Accordingly, the fuel level in the storage container 14 begins to drop, with the fuel escaping from the return line 18 initially When the fuel level drops further and level I is reached, a first signal of the reed switch 34 is triggered. This signal transmitted via line 54 is evaluated by control unit 36 and triggers the acoustic warning device 48.
  • the warning device can be operated, for example, with an optical one "Fuel tank empty - please stop" display can be combined
  • the reed switch 34 If the fuel level in the storage container 14 drops further to level II, the reed switch 34 generates a second signal which, in the control unit 36, processes the fuel pump 16 and shuts down the pre-pump 22
  • the internal combustion engine can also be stopped via line 44 by intervention in the engine control unit (not shown) or the electromagnetic shut-off valve can be closed via line 50, so that the supply line 20 is interrupted.
  • a timing element can also be provided in the control unit 36, which briefly suppresses signals from the reed switch 34 until the stowage container 14 is adequately filled via the preliminary pump 22.
  • the closure lid 17 or the filler neck 15 can be positioned directly above the storage container 14 or, as shown in FIG. 1, there is, for example, a cross section in the fuel container 10 as a guiding means semicircular trough 19 is provided which primarily directs the fuel supplied via the filler neck 15 to the storage container 14.
  • a tube could also be used.
  • a float valve 62 could be arranged on the bottom 12 of the fuel tank 10 on one or more suction lines 60 upstream of the fuel pump 16, as shown in FIG. 2, which flows through an opening 64 in the housing 66 with the force ⁇ container 10 is connected.
  • a float 68 which carries a metal ring 70 as a movable valve element, is arranged in the housing 66.
  • the metal ring 70 is opposite an annular holding magnet 72 which is arranged fixed to the housing and holds the float 68 in its closed position with a defined holding force. However, the buoyancy force when the fuel tank 10 is full is greater than the magnetic holding force of the holding magnet 72.
  • the float 68 sinks and closes the suction line 60 due to its valve action.
  • the holding magnet 72 ensures that fuel Fluctuations around the Nineau 56 can not lead to a constant opening and closing of the float valve 62, rather this remains stably closed. Accordingly, the fuel pump 16 can no longer suction when this defined drainage is reached, whereby the internal combustion engine comes to a standstill the float valve 62 air bubbles get into the fuel metering system
  • FIG. 3 shows a modified float valve 82, which is likewise arranged on the suction line 60 upstream of the fuel pump 16.
  • the float valve 82 in turn has a housing 84 in which a movable valve element 86 interacts with a valve seat 88 on the house side via an opening 90, the housing 84 is connected to the fuel tank 10
  • the movable valve element 86 is connected via a valve pin 92 to a lever 96 which is pivotably mounted on the housing 84 via an axis 94 and carries a float 98
  • a second lever 102 is pivotally mounted via a further axis 100, which has a float 104 at one end and a pawl 106 at the other end.
  • the pawl 106 acts with a detent 110 incorporated in a bearing bracket 108 of the housing 84 to lock the Lever 96 together with the float 98 with the float valve 82 closed
  • the movable valve element 86 is pressed onto the valve seat 88 with the lever 96 due to the swiveling down of the float 98, or the float valve 82 is closed in this position the resiliently pretensioned pawl 106 engages with the catch 110, the lever 102 sinking downward with the float 104.
  • the float valve 82 remains closed even with fluctuations in the fuel level 56 via the lock formed by the catch 110 and the pawl 106
  • the invention is not limited to the exemplary embodiments shown. Any combination or individual application of the described means for preventing a complete emptying of the fuel tank 10 is conceivable and can be indicated in the special embodiment.
  • the arrangement of a storage container is certainly advantageous if a large area Fuel tank 10 is used, in which strong fluctuations in the fuel level are possible. In the case of fuel tanks with a geodetically lower container section and a geotatically high container section, such a storage container can also be obsolete.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

L'invention concerne un dispositif d'alimentation en carburant d'un moteur à combustion interne, notamment dans un véhicule automobile, le carburant contenu dans un réservoir (10) étant aspiré au moyen d'une pompe de carburant (16) et acheminé vers le système de dosage du carburant du moteur à combustion interne au moyen d'une conduite montante (20). Pour prévenir tout dysfonctionnement, des moyens permettent d'éviter que le réservoir de carburant (10) continue à se vider une fois qu'il a atteint un niveau défini. Ces moyens peuvent être au moins un commutateur (34) qui détecte le niveau de remplissage du réservoir et qui, lorsque le niveau atteint un seuil déterminé, déclenche une unité de commande (36) qui arrête le moteur à combustion interne ou coupe la pompe de carburant (16). Les moyens en question peuvent également être des soupapes à flotteur (62, 82) qui ferment la conduite d'admission de la pompe de carburant (16) lorsqu'en se vidant, le réservoir de carburant atteint un niveau déterminé.
PCT/EP1996/005556 1995-12-16 1996-12-12 Dispositif d'alimentation en carburant d'un moteur a combustion interne WO1997022797A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19547097A DE19547097A1 (de) 1995-12-16 1995-12-16 Vorrichtung zur Versorgung einer Brennkraftmaschine mit Kraftstoff
DE19547097.4 1995-12-16

Publications (1)

Publication Number Publication Date
WO1997022797A1 true WO1997022797A1 (fr) 1997-06-26

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ID=7780362

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Application Number Title Priority Date Filing Date
PCT/EP1996/005556 WO1997022797A1 (fr) 1995-12-16 1996-12-12 Dispositif d'alimentation en carburant d'un moteur a combustion interne

Country Status (2)

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DE (1) DE19547097A1 (fr)
WO (1) WO1997022797A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2759436B1 (fr) 2013-01-25 2015-05-13 Veritas Ag Ventilateur
CN113260782A (zh) * 2018-12-20 2021-08-13 雷诺股份公司 燃料供应装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19827944A1 (de) * 1998-06-25 2000-03-09 Kautex Textron Gmbh & Co Kg Verfahren und Einrichtung zur Bestimmung der Kraftstoff-Restmenge in einem Kraftstoffsystem eines Kraftwagens
DE19833932C2 (de) * 1998-07-28 2001-08-16 Siemens Ag Kraftstoffversorgungssystem für eine Brennkraftmaschine
DE10019375A1 (de) * 2000-04-18 2001-11-29 Mannesmann Vdo Ag Verschlußvorrichtung für einen Kraftstoffbehälter
DE10208824A1 (de) 2002-03-01 2003-09-11 Siemens Ag Kraftstoff-Fördereinheit
US8944268B2 (en) * 2009-02-05 2015-02-03 Honda Motor Co., Ltd. Fuel tank

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DE358270C (de) * 1917-07-04 1922-09-08 Maschb Vorm Trauzl & Co Vorrichtung zur Verhinderung des Eindringens von Luft und Gasen in die Brennstoffleitung von Verbrennungskraftmaschinen
GB621579A (en) * 1946-08-12 1949-04-12 Glenn L Martin Co Improvements in or relating to a liquid storage and dispensing system
DE1066442B (de) * 1958-04-18 1959-10-01 Daimler Benz Ag Einrichtung im Kraftstoffbehaelter fuer Brennkraftmaschinen zum Aufstauen des Kraftstoffes
GB905703A (en) * 1960-02-22 1962-09-12 Charles Denis Bliss Williams Improvements relating to fuel injection systems
GB1524957A (en) * 1975-10-31 1978-09-13 Bridgemore Eng Ltd Air bleeding device for unse in apressurised liquid syste
US4342328A (en) * 1977-06-16 1982-08-03 The United States Of America As Represented By The Secretary Of The Army Two stage float valve
JPS58119960A (ja) * 1982-01-08 1983-07-16 Mazda Motor Corp 燃料タンク
EP0152042A1 (fr) * 1984-02-06 1985-08-21 James Larry Adkins Dispositif pour éviter la pénétration d'air dans le système d'injection de carburant d'un moteur
US5168891A (en) * 1992-02-06 1992-12-08 Gt Development Corporation Float valve and utilization system
US5201298A (en) * 1991-12-27 1993-04-13 Paccar Inc. Combination sending unit and fuel draw automatic shutoff valve
DE4227120A1 (de) * 1992-08-17 1994-02-24 Kloeckner Humboldt Deutz Ag Tankanlage
JPH0655944A (ja) * 1992-08-12 1994-03-01 Toyota Motor Corp 車両用燃料タンク

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DE3635174A1 (de) * 1986-10-16 1988-04-21 Robere Oehl Moped und motorradtankdeckel mit intigrierter fuellstandsanzeige ueber leuchtdiodenkette, durch benzindichte folienschalter mit eingeschweisster luftblase sowie entlueftung
DE3635241A1 (de) * 1986-10-16 1988-04-28 Daimler Benz Ag Einrichtung zur ueberwachung des pegels einer fluessigkeit in einem behaelter
DE3840912C2 (de) * 1987-12-18 2000-04-06 Volkswagen Ag Kraftstoffversorgung für eine Kraftfahrzeug-Brennkraftmaschine mit einer Sicherheitseinrichtung für den Crashfall
IT1240118B (it) * 1990-02-23 1993-11-27 Veglia Borletti Srl Dispositivo rilevatore del livello del carburante in un serbatoio di un autoveicolo.
DE4214768C2 (de) * 1992-05-04 2000-04-27 Rainer Berthold Anordnung zur Regelung des Ölstandes in einem Kurbelgehäuse
US5301113A (en) * 1993-01-07 1994-04-05 Ford Motor Company Electronic system and method for calculating distance to empty for motorized vehicles

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE358270C (de) * 1917-07-04 1922-09-08 Maschb Vorm Trauzl & Co Vorrichtung zur Verhinderung des Eindringens von Luft und Gasen in die Brennstoffleitung von Verbrennungskraftmaschinen
GB621579A (en) * 1946-08-12 1949-04-12 Glenn L Martin Co Improvements in or relating to a liquid storage and dispensing system
DE1066442B (de) * 1958-04-18 1959-10-01 Daimler Benz Ag Einrichtung im Kraftstoffbehaelter fuer Brennkraftmaschinen zum Aufstauen des Kraftstoffes
GB905703A (en) * 1960-02-22 1962-09-12 Charles Denis Bliss Williams Improvements relating to fuel injection systems
GB1524957A (en) * 1975-10-31 1978-09-13 Bridgemore Eng Ltd Air bleeding device for unse in apressurised liquid syste
US4342328A (en) * 1977-06-16 1982-08-03 The United States Of America As Represented By The Secretary Of The Army Two stage float valve
JPS58119960A (ja) * 1982-01-08 1983-07-16 Mazda Motor Corp 燃料タンク
EP0152042A1 (fr) * 1984-02-06 1985-08-21 James Larry Adkins Dispositif pour éviter la pénétration d'air dans le système d'injection de carburant d'un moteur
US5201298A (en) * 1991-12-27 1993-04-13 Paccar Inc. Combination sending unit and fuel draw automatic shutoff valve
US5168891A (en) * 1992-02-06 1992-12-08 Gt Development Corporation Float valve and utilization system
JPH0655944A (ja) * 1992-08-12 1994-03-01 Toyota Motor Corp 車両用燃料タンク
DE4227120A1 (de) * 1992-08-17 1994-02-24 Kloeckner Humboldt Deutz Ag Tankanlage

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PATENT ABSTRACTS OF JAPAN vol. 18, no. 292 (M - 1615) 3 June 1994 (1994-06-03) *
PATENT ABSTRACTS OF JAPAN vol. 7, no. 227 (M - 248)<1372> 7 October 1983 (1983-10-07) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2759436B1 (fr) 2013-01-25 2015-05-13 Veritas Ag Ventilateur
EP2759436B2 (fr) † 2013-01-25 2018-06-20 Veritas Ag Ventilateur
CN113260782A (zh) * 2018-12-20 2021-08-13 雷诺股份公司 燃料供应装置

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