EP1126157B1 - Dispositif d'alimentation en carburant pour un moteur à combustion interne d'un véhicule - Google Patents

Dispositif d'alimentation en carburant pour un moteur à combustion interne d'un véhicule Download PDF

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Publication number
EP1126157B1
EP1126157B1 EP00127411A EP00127411A EP1126157B1 EP 1126157 B1 EP1126157 B1 EP 1126157B1 EP 00127411 A EP00127411 A EP 00127411A EP 00127411 A EP00127411 A EP 00127411A EP 1126157 B1 EP1126157 B1 EP 1126157B1
Authority
EP
European Patent Office
Prior art keywords
fuel
pressure
internal combustion
combustion engine
valve
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
EP00127411A
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German (de)
English (en)
Other versions
EP1126157A2 (fr
EP1126157A3 (fr
Inventor
Klaus Joos
Jens Wolber
Thomas Frenz
Markus Amler
Hansjoerg Bochum
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 EP1126157A2 publication Critical patent/EP1126157A2/fr
Publication of EP1126157A3 publication Critical patent/EP1126157A3/fr
Application granted granted Critical
Publication of EP1126157B1 publication Critical patent/EP1126157B1/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
    • 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
    • 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
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • F02M37/106—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir the pump being installed in a sub-tank
    • 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
    • F02M37/02—Feeding by means of suction apparatus, e.g. by air flow through carburettors
    • F02M37/025—Feeding by means of a liquid fuel-driven jet pump

Definitions

  • the invention relates to a fuel supply device for an internal combustion engine of a motor vehicle according to the preamble of claim 1.
  • Such a fuel supply device is known from DE 28 08 731 C2.
  • This fuel supply device has an electric motor-driven delivery unit, is conveyed by the fuel from a reservoir to an injection system of the internal combustion engine.
  • a pressure sensor is provided, through which the fuel pressure is detected downstream of the delivery unit.
  • the pressure sensor is connected to a control device, by which the operation of the electric motor of the delivery unit is controlled such that the fuel pressure downstream of the delivery unit is at least approximately equal to a predetermined target pressure.
  • a throttled sequence is present, so that during operation of the delivery unit, a subset of the subsidized by this fuel is derived.
  • This allows operation of the delivery unit even if the fuel demand of the internal combustion engine is very low.
  • the delivery unit does not yet provide the full capacity, wherein a subset of funded by the pumping unit fuel is discharged through the throttled flow, so that under certain circumstances, the internal combustion engine supplied fuel amount is not sufficient.
  • fuel can flow out through the throttled sequence when the internal combustion engine is switched off, so that the fuel pressure in the injection system of the internal combustion engine drops.
  • US 4,559,968 discloses a fuel supply device with a pressure relief valve.
  • the pressure relief valve has a valve seat cooperating with a valve member which is moved in the direction of the valve seat after the switching off of the internal combustion engine, wherein it is immersed in an outlet opening shortly before placing on the valve seat. Characterized a throttling of the flow during the closing operation of the pressure limiting valve is effected, so that it closes with a time delay.
  • From DE 44 43 836 A1 discloses a device for supplying fuel is known in which a pressure regulator and a downstream valve is provided in the process, wherein a throttle is arranged parallel to the valve.
  • US 5,197,444 shows a fuel delivery device with a control valve in the drain.
  • the fuel supply device with the features of claim 1 has the advantage that the throttled flow is opened only by the valve means when the fuel pressure has at least approximately reached the predetermined target pressure, so that in particular for and after the start of the entire funded by the delivery unit amount of fuel is promoted to the internal combustion engine.
  • the valve means ensured by the valve means that when the internal combustion engine of the throttled flow is closed and the fuel pressure in the injection system is at least approximately maintained at the predetermined target pressure. If, when the internal combustion engine is switched off, as a result of heating of the fuel, a pressure increase occurs, then this can be relieved by the valve device.
  • the training according to claim 3 offers the advantage that by the Pressure sensor, the actual fuel pressure is detected in the injection system, which may be lower than the fuel pressure upstream of the fuel filter, for example, due to contamination of the fuel filter.
  • FIG. 1 shows a fuel supply device for an internal combustion engine of a motor vehicle in a schematic representation.
  • a fuel supply device for an internal combustion engine 10 of a motor vehicle is shown.
  • the internal combustion engine 10 has an injection system through which fuel is injected into the cylinders of the internal combustion engine.
  • the motor vehicle has a fuel tank 12, in which the fuel supply device is arranged substantially.
  • the fuel supply device has a delivery unit 14, which has an electric motor 16 as a drive, through which a pump part 18 is driven.
  • the electric motor 14 and the pump part 18 are arranged in a common housing 20.
  • a check valve 22 is integrated, which is arranged for example in a discharge from the housing 20 pressure port 24.
  • the check valve 22 opens in the conveying direction of the delivery unit 14 to the engine 10 and closes in the opposite direction, so that no fuel can flow back into the delivery unit 14 of the internal combustion engine 10.
  • a pressure relief valve 26 is also integrated, which is located upstream of the check valve 22.
  • the pressure relief valve 26 is set to an opening pressure that is substantially higher than the fuel pressure that normally occurs when the components of the fuel supply device are functioning correctly downstream of the delivery unit 14. If disturbances such as clogging or kinking of lines, the fuel pressure rises sharply, so opens the pressure relief valve 26 and can be funded by the pumping unit 14 fuel flow back into the reservoir 12 so that damage to the pumping unit 14 or the line 30 is avoided.
  • the pressure relief valve 26 may be set, for example, to an opening pressure between about 6 and 8 bar.
  • the delivery unit 14 is preferably arranged in a storage container 28, which is inserted into the storage container 12 and opposite to the reservoir 12 has a much smaller volume.
  • fuel is preferably conveyed from the reservoir 12 by means of a suction jet pump.
  • the reservoir 12 may have a plurality of separate chambers, wherein fuel is conveyed from one or more chambers of the reservoir 12 into the chamber in which the delivery unit 14 is arranged.
  • a pressure sensor 34 is arranged downstream of the fuel filter 32 in the conduit 30, through which the fuel pressure in the conduit 30 downstream of the fuel filter 32 is detected.
  • the pressure sensor 34 is connected to an electronic control device 36, in which the signals of the pressure sensor 34 in the manner explained in more detail below are processed.
  • the fuel pressure in the line 30 is evaluated and compared with a predetermined target pressure.
  • the setpoint pressure can be constant or variable depending, for example, on operating parameters of the internal combustion engine.
  • the control device 36 also controls the operation of the electric motor 16 of the delivery unit 14 such that a quantity of fuel is conveyed by the delivery unit 14, which is required to generate in the line 30 downstream of the fuel filter 32 a detected by the pressure sensor 34 fuel pressure, at least approximately is equal to the predetermined target pressure.
  • the control device 36 is preferably the voltage and / or power supply of the electric motor 16 of the delivery unit 14 clocked, including a clock module 38 is provided.
  • the clock module 38 can be changed by a variation of the duty cycle of the effective value of the voltage applied to the electric motor 16 voltage and / or the current supplied to the electric motor 16, so that by the delivery unit 14 required to achieve the target pressure delivery rate is provided.
  • the frequency with which the electric motor 16 is operated in a clocked manner is preferably above an audible range of approximately 20 kHz.
  • a valve device 40 Downstream of the pressure sensor 34, a valve device 40 is arranged, through which a throttled drain 42 is controlled.
  • the valve device 40 may also be arranged upstream of the pressure sensor 34.
  • the Valve means 40 is a pressure limiting valve that controls the operation depending on the fuel pressure in the conduit 30 downstream of the pressure sensor 34.
  • the valve device 40 is set so that it opens at a fuel pressure in the conduit 30, which is slightly less than the target pressure, which is adjusted via the control device 36 by appropriately controlled operation of the delivery unit 14.
  • the opening pressure of the valve device 40 may be, for example, about 80% to 95% of the target pressure. For example, if the target pressure is about 3 bar, the opening pressure of the valve device 40 may be about 2.8 bar.
  • the target pressure is variable, the opening pressure of the valve device 40 is set to be slightly below the lowest intended target pressure.
  • the delivery unit 14 depending on the voltage of the electrical system of the motor vehicle may not yet reached the full capacity.
  • the electric motor 16 of the delivery unit 14 is operated by the control device 36 with the full voltage.
  • the throttled sequence 42 is kept closed by the valve device 40, so that the entire quantity of fuel delivered by the delivery unit 14 reaches the internal combustion engine. Only when the fuel pressure has reached approximately the predetermined target pressure, the throttled drain 42 is opened by the valve means 40. When the fuel pressure has reached the target pressure during operation of the delivery unit 14, the drain 42 is continuously opened by the valve device 40, so that fuel flows through the drain 42.
  • the throttled drain 42 is designed so that a sufficiently large amount of fuel flows through it.
  • the suction jet pump 29 is connected to the outlet 42, so that the amount of fuel flowing through the outlet 42 is the amount of fuel for the suction jet pump 29.
  • the suction jet pump 29 is connected via a line 44 to the outlet 42 and has in known manner a nozzle 45 through which the propulsion jet emerges, and a nozzle 45 downstream opening 46, enters through the additional fuel from the reservoir 12 and in the Storage tank 28 is promoted.
  • the sequence 42 is designed such that the amount of propulsion of the suction jet pump 29 is sufficient to ensure a filling of the storage container 28.
  • Two or more suction jet pumps 29 may also be connected to the outlet 42.
  • valve device 40 By the valve device 40 is also ensured that when the engine 10 and non-operated delivery unit 14, the process is closed, so that in the injection system of the internal combustion engine 10, a sufficient fuel pressure is maintained.
  • the valve device 40 fulfills a safety function in that the fuel pressure in the injection system of the internal combustion engine 10 is limited, since the process is opened when the opening pressure of the valve device 40 is exceeded. An increase in the fuel pressure can occur, for example, in overrun operation of the internal combustion engine, in which no fuel is consumed, or when the fuel is heated after switching off the internal combustion engine 10.
  • the storage container 28 with the delivery unit 14 arranged therein, the fuel filter 32, the pressure sensor 34, the valve device 40 with the sequence 42 and the clock module 38 are preferably combined to form a structural unit, which is assembled outside of the reservoir 12 and used as a structural unit in the reservoir 12.
  • the assembly may also have a level indicator 48 for the level of the reservoir 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Claims (5)

  1. Dispositif d'alimentation en carburant pour un moteur à combustion interne d'un véhicule automobile, comportant :
    - un module d'alimentation (14) commandé de manière électromotrice, pour amener du carburant d'un réservoir de stockage (12) jusqu'à une installation d'injection du moteur à combustion interne (10)
    - une sortie étranglée (42) en aval du module d'alimentation (14) commandée en fonction de la pression du carburant par un dispositif de soupapes (40), le dispositif de soupapes (40) ouvrant la sortie (42) lors d'un dépassement d'une pression du carburant inférieure à une pression de consigne, et
    - un clapet anti-retour (22) intégré au module d'alimentation (14),
    caractérisé en ce qu'
    un capteur de pression (34), saisit la pression du carburant en aval du module d'alimentation (14), et une unité de commande (36) reliée au capteur de pression (34) commande fonctionnement du module d'alimentation (14) pour que la pression du carburant soit au moins approximativement égale à une pression de consigne, la sortie étranglée (42) présentant une section transversale d'étranglement constante et alimentant au moins une pompe à jet aspirant (29).
  2. Dispositif d'alimentation en carburant selon la revendication 1,
    caractérisé en ce que
    le dispositif de soupapes (40) ouvre la sortie (42) lors du dépassement d'environ 80 % à 95 % de la pression de consigne.
  3. Dispositif d'alimentation en carburant selon la revendication 1 ou 2,
    caractérisé en ce qu'
    un filtre à carburant (32) est installé entre le module d'alimentation (14) et le capteur de pression (34), qui saisit donc la pression du carburant (32) en aval du filtre à carburant (32).
  4. Dispositif d'alimentation en carburant selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce qu'
    une soupape de limitation de pression (26) est intégrée au module d'alimentation (14) en amont du clapet anti-retour (22).
  5. Dispositif d'alimentation en carburant selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le carburant est transporté par la pompe à jet aspirant (29) entre différentes chambres du réservoir de stockage (12) et/ou depuis le réservoir de stockage (12) dans un réservoir d'alimentation (28), à partir duquel le module d'alimentation (14) aspire le carburant.
EP00127411A 2000-02-15 2000-12-14 Dispositif d'alimentation en carburant pour un moteur à combustion interne d'un véhicule Expired - Lifetime EP1126157B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10006622A DE10006622A1 (de) 2000-02-15 2000-02-15 Kraftstoffversorgungseinrichtung für eine Brennkraftmaschine eines Kraftfahrzeugs
DE10006622 2000-02-15

Publications (3)

Publication Number Publication Date
EP1126157A2 EP1126157A2 (fr) 2001-08-22
EP1126157A3 EP1126157A3 (fr) 2002-03-20
EP1126157B1 true EP1126157B1 (fr) 2006-08-09

Family

ID=7630933

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00127411A Expired - Lifetime EP1126157B1 (fr) 2000-02-15 2000-12-14 Dispositif d'alimentation en carburant pour un moteur à combustion interne d'un véhicule

Country Status (5)

Country Link
US (1) US6474310B2 (fr)
EP (1) EP1126157B1 (fr)
JP (1) JP2001254655A (fr)
KR (1) KR20010082019A (fr)
DE (2) DE10006622A1 (fr)

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US6622707B2 (en) 2000-06-28 2003-09-23 Delphi Technologies, Inc. Electronic returnless fuel system
US6532941B2 (en) * 2000-08-29 2003-03-18 Delphi Technologies, Inc. Electronic returnless fuel system
US7318414B2 (en) * 2002-05-10 2008-01-15 Tmc Company Constant-speed multi-pressure fuel injection system for improved dynamic range in internal combustion engine
US6705298B2 (en) * 2002-05-20 2004-03-16 Denso International America, Inc. Fuel pump module
EP1576272B1 (fr) * 2002-12-07 2006-12-13 Robert Bosch Gmbh Systeme d'alimentation en carburant sans reflux
DE10329268A1 (de) * 2003-06-30 2005-01-20 Robert Bosch Gmbh Vorrichtung zum Fördern von Kraftstoff aus einem Vorratsbehälter zu einer Brennkraftmaschine
DE102004007878A1 (de) * 2004-02-18 2005-09-15 Ti Automotive (Neuss) Gmbh Kraftstoffversorgungssystem und Verfahren zur Regelung der Kraftstoffversorgung
US7168414B2 (en) * 2004-09-03 2007-01-30 Federal Mogul World Wide, Inc. Marine vapor separator with bypass line
DE102004049286A1 (de) 2004-10-09 2006-04-20 Robert Bosch Gmbh Vorrichtung zum Fördern von Kraftstoff
DE102004052439A1 (de) 2004-10-28 2006-05-04 Siemens Ag Kraftstoffpumpe und Kraftstoffversorgungsanlage für eine Brennkraftmaschine eines Kraftfahrzeuges mit einer Kraftstoffpumpe
DE102005003592A1 (de) * 2005-01-26 2006-08-03 Daimlerchrysler Ag Kraftstoffversorgungseinrichtung
JP4450211B2 (ja) * 2005-01-28 2010-04-14 株式会社デンソー 燃料供給装置
JP4670450B2 (ja) * 2005-04-15 2011-04-13 トヨタ自動車株式会社 内燃機関の燃料供給装置
EP1893864B1 (fr) * 2005-06-21 2009-03-11 Daimler AG Dispositif d'alimentation en carburant
DE102006001878A1 (de) * 2006-01-13 2007-07-19 Siemens Ag Kraftstofffördereinrichtung
WO2007115102A2 (fr) 2006-03-29 2007-10-11 Robert Bosch Gmbh Systeme de carburant avec regulation de pression et decharge
DE102006051590A1 (de) * 2006-11-02 2008-05-08 Robert Bosch Gmbh Vorrichtung zum Fördern von Kraftstoff
DE102007028398A1 (de) 2007-06-15 2008-12-24 Ti Automotive (Neuss) Gmbh Kraftstoffpumpe mit elektronisch kommutiertem Motor
US8151767B2 (en) * 2007-08-08 2012-04-10 Ford Global Technologies, Llc Fuel control for direct injection fuel system
US7448361B1 (en) 2007-10-23 2008-11-11 Ford Global Technologies, Llc Direct injection fuel system utilizing water hammer effect
US7966984B2 (en) * 2007-10-26 2011-06-28 Ford Global Technologies, Llc Direct injection fuel system with reservoir
DE102010062121A1 (de) 2010-11-29 2012-05-31 Robert Bosch Gmbh Vorrichtung zum Fördern von Kraftstoff
US9097217B2 (en) * 2011-08-31 2015-08-04 Gm Global Technology Operations. Llc Propulsion systems and modules for vehicles
DE102013212267A1 (de) * 2013-06-26 2014-12-31 Robert Bosch Gmbh Kraftstoff-Fördersystem mit Teildruckentlastungsventil an Treibleitung einer Saugstrahlpumpe
SE540028C2 (sv) * 2014-07-08 2018-02-27 Scania Cv Ab Bränslesystem för förbränningsmotor, förbränningsmotor med ett sådant bränslesystem, fordon med ett sådant bränslesystemoch ett förfarande för att dämpa tryckfluktuationer hos en bränslefilteranordning i ett bränslesystem
US9909468B2 (en) * 2015-08-25 2018-03-06 Caterpillar Inc. Fluid conditioning system with recirculation loop and method for operating same
CN106870224A (zh) * 2017-02-07 2017-06-20 无锡开普机械有限公司 柴油发动机用低压油路系统
CN108533427A (zh) * 2018-03-22 2018-09-14 安徽江淮汽车集团股份有限公司 一种汽车燃油系统

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Also Published As

Publication number Publication date
EP1126157A2 (fr) 2001-08-22
US20010018908A1 (en) 2001-09-06
DE10006622A1 (de) 2001-08-16
DE50013301D1 (de) 2006-09-21
JP2001254655A (ja) 2001-09-21
US6474310B2 (en) 2002-11-05
KR20010082019A (ko) 2001-08-29
EP1126157A3 (fr) 2002-03-20

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