EP0771946B1 - Kraftstoffanlage - Google Patents

Kraftstoffanlage Download PDF

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Publication number
EP0771946B1
EP0771946B1 EP96112865A EP96112865A EP0771946B1 EP 0771946 B1 EP0771946 B1 EP 0771946B1 EP 96112865 A EP96112865 A EP 96112865A EP 96112865 A EP96112865 A EP 96112865A EP 0771946 B1 EP0771946 B1 EP 0771946B1
Authority
EP
European Patent Office
Prior art keywords
pressure
fuel
engine
valve
fuel system
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
EP96112865A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0771946A1 (de
Inventor
Christian Treml
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0771946A1 publication Critical patent/EP0771946A1/de
Application granted granted Critical
Publication of EP0771946B1 publication Critical patent/EP0771946B1/de
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
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • F02M37/0029—Pressure regulator in the low pressure fuel 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
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
    • 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
    • F02M37/0088—Multiple separate fuel tanks or tanks being at least partially partitioned
    • F02M37/0094—Saddle tanks; Tanks having partition walls
    • 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
    • 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
    • F02M37/02—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 system for a motor vehicle according to the features the preamble of claim 1.
  • a fuel system for a motor vehicle is already known, in which a Three / two-way valve is used to regulate the fuel circuit. This valve is relatively complex, expensive and requires a relatively large one Installation space.
  • EP-A-0 678 664 a generic fuel system is known in which a check valve and a pressure regulator are integrated in one component.
  • the known fuel system has a flow line in which an elastic Element is installed as a print buffer.
  • the object of the invention is to provide a fuel system for a motor vehicle create, using simple, mechanical components and the one requires little installation space, in particular the new fuel system for the Running loss fuel circuit can be used.
  • the components used have a simple structure and can be in one be integrated into a single unit, this applies in particular to a check valve, a pressure regulator and possibly a filter. Due to the arrangement of these components close to the tank and due to the elasticity present, an impermissibly high pressure is avoided. As a backup, pressure buffers in the form of elastic elements are particularly important built into the pipes.
  • the formation of the gas bubbles prevented by a check valve in the flow line during the reheating phase.
  • the pressure in the fuel rail rises during the post-heating phase the system pressure so that there is almost no outgassing of the fuel.
  • the engine-side pressure relief valve ensures good system filling and on the other hand protection against impermissibly high pressures in the post-heating phase reached.
  • valve block or another unit reduces the space requirement. This is it is also possible to arrange the valve block or the unit close to the tank.
  • the housing of the valve block or the unit can be made of metal or Plastic. In particular, the design of the housing as an injection molded part has proven to be inexpensive.
  • the output to the engine-side return line is preferred for the injection rail trained at the highest point. This has the advantage that gas, which is located in the injection bar, completely via the return into the tank can be derived.
  • the fuel system is universal can be used, which results in a variant reduction. Raising the Pressure in the injection bar in the post-heating phase of the engine standstill, that the hot start can be controlled from the tank even without flushing with cold fuel is.
  • the fuel system according to the invention has improved operating conditions when using a suction jet pump because the temperature level is reduced in the lines and in the fuel tank, so that less There are gas components in the fuel. In this way, the suction jet pump delivers better so that the performance of the suction jet pump and the fuel pump is reducible.
  • the reduced requirements for conveying capacity and hot conveying enable the use of cost-effective single-stage pumps or flow pumps. Retrofitting of old vehicles is also possible.
  • the fuel system according to the invention operates in the supply and return lines quieter than known fuel systems at significantly lower costs. Finally the components used are less sensitive to dirt.
  • Fig. 1 shows a fuel system 1, in which from a fuel tank 2 a fuel pump 3 fuel 4 to an injection rail 5 of a not shown Motors M is funded.
  • the fuel pump 3 is usually operated electrically and is located in a surge pot 6.
  • the fuel tank shown in FIG. 1 2 has two chambers 7a and 7b. The fuel level in the the two chambers are different, as is the case with one on top Triangle is marked.
  • the fuel is supplied by a suction jet pump 8 conveyed from the left chamber 7b into the right chamber 7a.
  • the suction jet pump 8 is by the amount of fuel not required by the engine M, the flows back into the fuel tank 2, driven.
  • For a one-piece fuel tank drops the suction jet pump 8, so that the fuel flowing back flows directly into the fuel tank via a return line 9.
  • the fuel delivered by the fuel pump 3 from the fuel tank 2 flows via a flow line 10 to a filter 11.
  • the filtered fuel is applied a pressure regulator 12 and then flows through a pressure maintaining or check valve 13. Then the fuel gets into the injection bar 5.
  • the Fuel that is not required by engine M passes through return line 17 or 9 back into the fuel tank 2.
  • the engine-side pressure relief valve 15 is closed. Only when filling the system and if necessary during the reheating phase when the engine is stopped, the pressure relief valve 15 is activated.
  • the opening pressure of the additional pressure relief valve 15 is higher than that System pressure, but on the other hand lower than the opening pressure of the pump side Pressure relief valve 100.
  • the system filling is significantly faster by an overpressure acting on a vacuum connection of the pressure regulator 12 with simultaneous operation of the fuel pump 3.
  • the engine-side pressure relief valve 15 protects against impermissibly high pressures in the reheating phase. Reaches the fuel in the Injection bar 5 an impermissibly high pressure, the pressure relief valve 15 opened and the excess fuel can 14 and 9 flow back into the fuel tank 2.
  • the fuel pump 3 delivers a constant amount of fuel through the supply line 10.
  • the pressure regulator 12 the amount not required by the engine of fuel via a return line 17 to the return line 9.
  • An outlet opening 18 is at the highest on the injection bar 5 Place of the injection bar 5 is formed. This ensures that the injection bar 5 gas located completely transported back to the fuel tank 2 can be.
  • the valve block 20 has a housing 21, which can be made of metal or plastic. In the case 21, a connection opening 22 for the pressure regulator 12 is formed.
  • the housing 21 has an H shape. The direction of flow of the fuel is indicated by arrows in FIG. 2 displayed.
  • the engine-side pressure relief valve 15 is arranged in the upper left section 24 of the housing 21, which for Return line 14 leads.
  • the check valve 13 is located in the section 23 opposite thereto built-in.
  • Connecting line 17 is provided, which consists of sections 9 'and 24 Return line 25 with the existing sections 10 and 23
  • Flow line 26 of the housing 21 connects to one another.
  • ends 27 and 28 of the lines 25 and 26 of the Housing 21 are formed in cross-section conical thickenings, which in Reduce the cross-section of the axial direction outwards.
  • ends 27 and 28 can have a pine cone-shaped cross section exhibit.
  • a pipe socket 29 of the pressure regulator 12 is arranged in the connection opening 22, which is formed in the flow line 26 of the housing 21.
  • the pipe socket 29 has a cylindrical section 30 whose diameter is the inside diameter the return line 17 is adapted.
  • a seal 31 for example an O-ring, is provided on its outer circumference.
  • On the cylindrical Section 30 closes another cylindrical section 32 with a larger one Diameter. Is on the outer periphery of the cylindrical portion 32 a seal 33 is also arranged.
  • the pressure regulator 12 is a membrane, not shown, or another device provided that above a certain limit pressure, for example between 3 and 4 bar, opens so that the fuel from the supply line 26 through a through hole formed in the cylindrical portions 30 and 32 34 can flow through.
  • the fuel flowing through the passage opening 34 is represented by the essentially horizontal arrow in FIG. 2.
  • Fig. 3 shows a known embodiment of a fuel system 1 ', in which Difference from the embodiment of Figures 1 and 2, the engine-side pressure relief valve 15 is omitted. Accordingly, the engine side is also missing Return line 14 and the outlet opening 18 on the injection bar 5. Added is an elastic element 39, for example in the form of a pressure accumulator can be trained. Between the intake manifold of the engine M and the Pressure regulator 12, as in FIG. 1, a vacuum line 40 can be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
EP96112865A 1995-11-02 1996-08-09 Kraftstoffanlage Expired - Lifetime EP0771946B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19540892A DE19540892A1 (de) 1995-11-02 1995-11-02 Kraftstoffanlage
DE19540892 1995-11-02

Publications (2)

Publication Number Publication Date
EP0771946A1 EP0771946A1 (de) 1997-05-07
EP0771946B1 true EP0771946B1 (de) 2000-11-02

Family

ID=7776472

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96112865A Expired - Lifetime EP0771946B1 (de) 1995-11-02 1996-08-09 Kraftstoffanlage

Country Status (4)

Country Link
US (1) US5749345A (es)
EP (1) EP0771946B1 (es)
DE (2) DE19540892A1 (es)
ES (1) ES2152462T3 (es)

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JPH10246162A (ja) * 1997-03-03 1998-09-14 Sanshin Ind Co Ltd 筒内燃料噴射式エンジンの燃料供給装置
DE19750036C2 (de) * 1997-11-12 1999-09-02 Mannesmann Vdo Ag Kraftstoffördereinrichtung
EP0930426B1 (de) * 1998-01-13 2003-12-03 Siemens Aktiengesellschaft Verfahren zur Vorgabe des Einspritzdruck-Sollwertes bei Speichereinspritzsystemen
FR2774132B1 (fr) * 1998-01-27 2000-04-07 Semt Pielstick Dispositif pour eviter la cavitation dans les pompes a injection
JPH11241659A (ja) * 1998-02-25 1999-09-07 Mitsubishi Electric Corp 燃料供給装置
US5832900A (en) * 1998-04-23 1998-11-10 Siemens Automotove Corporation Fuel recirculation arrangement and method for direct fuel injection system
JP2000145591A (ja) * 1998-09-01 2000-05-26 Mitsubishi Electric Corp 燃料供給装置
US6098599A (en) * 1998-09-02 2000-08-08 Chrysler Corporation System for delivering fuel to a motor vehicle engine and related method
DE19849718A1 (de) * 1998-10-28 2000-05-04 Bayerische Motoren Werke Ag Kraftstoff-Fördersystem
US6148849A (en) * 1999-05-07 2000-11-21 Dynamic Safety, Inc. Safety vehicular fuel system
DE19936287C2 (de) * 1999-08-02 2003-04-30 Bosch Gmbh Robert Bedarfssteuerung für ein Kraftstoffördermodul mit variablem Systemdruck
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DE19950289A1 (de) 1999-10-19 2001-04-26 Bosch Gmbh Robert Kraftstoffversorgungseinrichtung für eine Brennkraftmaschine eines Kraftfahrzeugs
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JP2006161763A (ja) * 2004-12-10 2006-06-22 Keihin Corp インラインポンプ式燃料噴射装置における燃料流路モジュール
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DE102005017519B4 (de) 2005-04-15 2022-07-07 Vitesco Technologies GmbH Kraftstoff-Fördereinheit
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JP4803269B2 (ja) * 2009-02-24 2011-10-26 株式会社デンソー 脈動低減装置
DE102009049799B4 (de) * 2009-10-16 2018-07-12 Kautex Textron Gmbh & Co. Kg Kraftstoffbehälter für ein KFZ
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CN104838128B (zh) * 2012-10-13 2017-09-12 大众汽车有限公司 燃料供应装置
DE102014223788A1 (de) * 2014-11-21 2016-05-25 Robert Bosch Gmbh Drucksteuereinrichtung insbesondere für eine ein Fluid fördernde Hochdruckpumpe
US11434931B2 (en) 2020-09-23 2022-09-06 Delphi Technologies Ip Limited Fuel system having a valve upstream of a jet pump
US11846246B2 (en) * 2021-05-27 2023-12-19 Thermo King Llc Methods and systems for controlling engine inlet pressure via a fuel delivery system of a transport climate control system

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Also Published As

Publication number Publication date
DE59606086D1 (de) 2000-12-07
DE19540892A1 (de) 1997-05-07
US5749345A (en) 1998-05-12
ES2152462T3 (es) 2001-02-01
EP0771946A1 (de) 1997-05-07

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