WO2009049999A1 - Installation d'alimentation en carburant et soupape de délestage pour installation d'alimentation en carburant - Google Patents

Installation d'alimentation en carburant et soupape de délestage pour installation d'alimentation en carburant Download PDF

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Publication number
WO2009049999A1
WO2009049999A1 PCT/EP2008/062665 EP2008062665W WO2009049999A1 WO 2009049999 A1 WO2009049999 A1 WO 2009049999A1 EP 2008062665 W EP2008062665 W EP 2008062665W WO 2009049999 A1 WO2009049999 A1 WO 2009049999A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
pressure
valve
relief valve
fuel supply
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.)
Ceased
Application number
PCT/EP2008/062665
Other languages
German (de)
English (en)
Inventor
Peter Schelhas
Andreas Posselt
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
Priority to EP08804585A priority Critical patent/EP2209662A1/fr
Publication of WO2009049999A1 publication Critical patent/WO2009049999A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/20—Excess-flow valves
    • F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
    • F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
    • F16K17/26—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in either direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/077—Fuel tanks with means modifying or controlling distribution or motion of fuel, e.g. to prevent noise, surge, splash or fuel starvation
    • 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
    • F02M37/0058—Returnless fuel systems, i.e. the fuel return lines are not entering the fuel tank

Definitions

  • a fuel pump delivers fuel from a reservoir via a fuel line to an injection valve or to a plurality of injection valves.
  • a fuel pump delivers fuel from a reservoir via a fuel line to an injection valve or to a plurality of injection valves.
  • the fuel passes directly or indirectly into a combustion chamber of the internal combustion engine.
  • a high-pressure pump raises the funded by the fuel pump fuel in the fuel line to a high pressure before the fuel reaches the injectors.
  • a connected to the fuel line pressure valve or pressure control valve ensures that during operation of the internal combustion engine, the pressure in the fuel line is at a constant value. So that no gas bubbles can form in the fuel line, when the internal combustion engine is turned off with heated fuel, the pressure control valve must be in the parked state of the
  • the fuel supply system according to the invention and the relief valve according to the invention have the advantage that when the internal combustion engine and a pressure in the fuel line below a threshold pressure, the pressure in the fuel line, even at changing temperatures can not rise, and still during operation of the engine and after a Stopping the engine a rules or holding the pressure at the anticipated level continues to be unlimited.
  • the elastic element which acts on the closing body of the relief valve in the opening direction offers the advantage that, independently of an installation position of the relief valve, the relief valve reliably opens at a pressure on the inlet side below the limiting pressure.
  • a pressure valve is provided for regulating and maintaining the operating pressure in the fuel supply system during operation of the internal combustion engine. Integrating the relief valve into the Valve closure element of the pressure valve has the advantage that the relief valve does not require an additional connection.
  • FIG. 1 shows a fuel supply system with a relief valve
  • Figure 2 shows a relief valve
  • Figure 3 shows a modified relief valve
  • Figure 4 shows a modified fuel supply system with a relief valve and a separately arranged therefrom pressure valve
  • Figure 5 shows another embodiment of the relief valve.
  • a fuel supply system 1 with a fuel tank 2, a fuel pump 4, a fuel filter 8, a relief valve 10, a pressure control valve, also referred to as a pressure valve 12, a fuel line 14, a high-pressure pump 16, an internal combustion engine 18, a high-pressure line 20 and at least one injection valve 22.
  • the relief valve 10 and the pressure valve 12 are located within a common valve housing.
  • the fuel pump 4 is driven by a pump motor 6.
  • the fuel pump 4 sucks fuel from the fuel tank 2 and promotes it through the fuel filter 8 in a fuel line 14.
  • the fuel passes through the injection valve 22 into a suction pipe or directly into a combustion chamber of the internal combustion engine 18.
  • the pressure of the fuel is controlled mechanically either via the pressure valve 12, or controlled as needed, with a pressure sensor, not shown, in closed loop, regulated or without pressure sensor, via a stored in an electronic control unit map in a so-called open loop.
  • FIG. 2 shows a longitudinal section through the relief valve 10 of the fuel supply system 1 integrated in the pressure valve 12.
  • the relief valve 10 essentially comprises a relief valve housing 24, a closing body 26, a valve seat 28, an elastic element 30 and a closing body guide 32.
  • the relief valve 10 has an inlet side 34 and a downstream side 36.
  • the valve seat 28 consists, for example, of a ring of elastomeric or rubber-like material inserted or vulcanized into the relief valve housing 24.
  • the closing body 26 is for example a ball made of metal or plastic.
  • the closing body guide 32 is, for example, a bush pressed into the relief valve housing 24 and, if required, has longitudinal ribs for guiding the closing body 26 and thus fuel between the closing body 26 and the closing body guide 32.
  • the elastic element 30 is realized for example in the form of a small helical compression spring. The elastic element 30 acts on the closing body 26 in the opening direction away from the valve seat 28.
  • the relief valve housing 24 also serves as a valve closing member 40 of the pressure valve 12. Or in other words, the relief valve 10 is completely integrated into the valve closing element 40 of the pressure valve 12, with, inter alia, the advantage that the relief valve 10 no additional connection to the fuel line 14 is required.
  • the pressure valve 12 comprises a valve housing 42 with a provided on the valve housing 42 the regulator valve seat 44.
  • the valve housing 42 of the pressure valve 12 has an inlet port 46, a tank return 48 and a regulator spring 50.
  • At the inlet port 46 may optionally a Vorsieb 52 and / or a Vordrossel 54 may be provided.
  • On the valve closing element 40 there is a sealing element 56, which preferably consists of an elastomeric material.
  • the regulator spring 50 is clamped between the valve closing element 40 and the adjusting screw 58.
  • the regulator spring 50 presses the sealing element 56 of the valve closing element 40 against the regulator valve seat 44.
  • the regulator spring 50 determines the inlet-side opening pressure of the pressure valve 12. With the aid of the adjusting screw 58, the opening pressure of the pressure valve 12 can be adjusted, when the valve closing element 40 is exceeded
  • Sealing element 56 lifts off from the valve seat 44.
  • fuel can no longer flow from the fuel line 14 between the regulator valve seat 44 and the valve closing element 40 from the inlet port 46 to the tank return 48.
  • the pressure valve 40 ensures that during operation of the internal combustion engine 18 and for a certain time after switching off the internal combustion engine 18, the operating pressure of the fuel in the fuel line 14 is maintained at the intended height.
  • valve closing element 40 When the opening pressure in the fuel line 14 is exceeded, the valve closing element 40 lifts from the regulator valve seat 44 so that excess fuel can flow from the fuel line 14, through the pressure valve 12 and through the tank return 48 into the fuel reservoir 2.
  • the pressure prevailing in the fuel line 14 prevails virtually unchanged on the inlet side 34 of the relief valve 10.
  • the pressure on the inlet side 34 acts on the closing body 26 in the closing direction against the force of the elastic element 30 and against the valve seat 28th
  • the closure member 26 is pressed against the valve seat 28 of the relief valve 10, so that no fuel from the inlet side 34 through the relief valve 10 to the downstream side 36 of the relief valve 10th can flow. If the pressure on the inlet side 34 is lower than the limiting pressure, then the closing body 26 has lifted at least as far from the valve seat 28 that fuel from the inlet side 34 along the closing body guide 32 between the closing body 26 and the relief valve housing 24 to the downstream side 36 of the relief valve 10 can.
  • the elastic member 30 assists opening.
  • the limit pressure below which the relief valve 10 is open, and above which the relief valve 10 is closed, is substantially lower than the opening pressure at which exceeding the pressure valve 12 opens, so that during operation of the internal combustion engine 18 excess funded fuel from the fuel line 14th only pass between the regulator valve seat 44 and the sealing element 56 through the pressure valve 12 to the tank return 48, but not through the relief valve 10th
  • the fuel pump 4 In the normal operating state of the internal combustion engine 18, the fuel pump 4 usually delivers more fuel than required by the engine 18 and the excess fuel flows from the fuel line 14 through the pressure valve 12 to the tank return 48.
  • the valve closing element 40 lifts just so far from the regulator valve seat 44, that in the fuel line 14, the desired operating pressure prevails.
  • the Vordrossel 54 can be omitted.
  • the Vordrossel 54 is provided when the pressure control, as described above, takes place as needed.
  • the regulator spring 50 of the pressure valve 12 presses the valve closing element 40 against the regulator valve seat 44.
  • the pressure valve 12 and the discharge valve 10 are closed.
  • the fuel is trapped in the fuel line 14, so that for as long as possible after stopping the internal combustion engine 18, the pressure in the fuel line 14 is maintained at the highest possible level. If the fuel expands due to heating while the pressure is at a high level, then the pressure valve 12 opens and limits the maximum pressure occurring to the previously set by the regulator spring 50 value.
  • the pressure of the fuel in the fuel line 14 may fall below the limit pressure set at the relief valve 10. Then, the relief valve 10 opens. If then due to temperature change, for example, by temperature change due to different solar radiation, the fuel in the fuel line 14 heats and expands, fuel can flow virtually depressurized from the fuel line 14 through the relief valve 10 back into the fuel tank 2. This ensures that also due to temperature changes, the pressure of the fuel in the fuel line 14 can not rise. This ensures that no Fuel passes through an eventual leakage at the injection valve 22 into the internal combustion engine 18.
  • FIG. 3 shows a further, preferably selected, particularly advantageous exemplary embodiment.
  • FIG. 3 shows a broken longitudinal section through the pressure valve 12 with the integrated relief valve 10, wherein the parts not shown in Figure 3, for example, as shown in Figure 2 may be performed.
  • the elastic member 30 ensures that the closing body 26 is adjusted so far in the opening direction that arise between the closing body 26 and the valve seat 28 circumferentially at least partial passages, so that fuel from the inlet side 34 on the continue page 36 can pass.
  • the closing body 26 is acted upon by the pressure acting on the inlet side 34 in the closing direction against the valve seat 28 so strong that the unevenness of the valve seat 28, which act as an elastic element 30, be pressed flat so that no fuel from the inlet side 34 on the between the closing body 26 and the valve seat 28
  • the unevenness can also be provided on the closing body 26, for example in the form of corrugations, so that the closing body 26 is pressed against the valve seat 28 so strongly only above the limit pressure that the relief valve 10 is sealed.
  • FIG. 4 shows a further possible embodiment of a fuel supply system 1 with the relief valve 10.
  • the relief valve 10 and the pressure valve 12 are housed in separate housings.
  • the pressure valve 12 may be carried out as usual in fuel supply systems so far, which is why the pressure valve 12 need not be discussed in more detail.
  • FIG. 5 shows a longitudinal section through the relief valve 10 of the fuel supply system 1 shown in FIG.
  • the relief valve 10 In the operating position, the relief valve 10 is aligned so that the closing body 26 is moved away from the valve seat 28 due to its weight in the opening direction when the pressure on the inlet side 34 is lower than the limit pressure.
  • the elastic element 30 contained in the embodiments shown in FIGS. 2 and 3 can be dispensed with.
  • the inlet side 34 is directly connected to the fuel line 14. If the pressure in the fuel line 14 and on the inlet side 34 is lower than the limit pressure, then the closing body has lifted off the valve seat 28 due to its weight and fuel can pass virtually without pressure from the inlet side 34 to the downstream side 36 and then into the fuel tank 2 ,
  • the closure member 26 is immediately actuated by the fuel against the valve seat 28 in the closing direction, so that the relief valve 10 during operation of the internal combustion engine 18 and for some time after stopping the engine 18 remains permanently closed, as long as the Pressure of the fuel in the fuel line 14 is above the limit pressure.
  • the relief valve 10 opens only when after prolonged shutdown of the internal combustion engine, the pressure of the fuel in the fuel line 14 has fallen below the limit pressure.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Safety Valves (AREA)

Abstract

Sur des installations d'alimentation en carburant, on a constaté jusqu'ici le problème qu'après un temps d'arrêt assez long du moteur à combustion interne et suite à des variations de température, la pression augmente de manière indésirable dans les conduits. Dans une installation (1) d'alimentation en carburant équipée d'une soupape de délestage (10) selon l'invention, la soupape de délestage (10) garantit que lorsque le moteur à combustion interne (18) a été arrêté, dès que la pression du carburant est descendue en dessous d'une pression limite dans le conduit de carburant (14), le carburant peut passer pratiquement sans obstacle depuis le conduit de carburant (14) jusque dans le réservoir de carburant (2), avec l'avantage que l'on empêche une augmentation indésirable de pression dans le conduit de carburant (14). La soupape de délestage peut être utilisée sur tous les types d'installations d'alimentation en carburant mais de préférence sur des installations d'alimentation en carburant de véhicules automobiles.
PCT/EP2008/062665 2007-10-12 2008-09-23 Installation d'alimentation en carburant et soupape de délestage pour installation d'alimentation en carburant Ceased WO2009049999A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08804585A EP2209662A1 (fr) 2007-10-12 2008-09-23 Installation d'alimentation en carburant et soupape de délestage pour installation d'alimentation en carburant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710049144 DE102007049144A1 (de) 2007-10-12 2007-10-12 Kraftstoffversorgungsanlage und Entlastungsventil für eine Kraftstoffversorgungsanlage
DE102007049144.3 2007-10-12

Publications (1)

Publication Number Publication Date
WO2009049999A1 true WO2009049999A1 (fr) 2009-04-23

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Family Applications (1)

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PCT/EP2008/062665 Ceased WO2009049999A1 (fr) 2007-10-12 2008-09-23 Installation d'alimentation en carburant et soupape de délestage pour installation d'alimentation en carburant

Country Status (3)

Country Link
EP (1) EP2209662A1 (fr)
DE (1) DE102007049144A1 (fr)
WO (1) WO2009049999A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103419624A (zh) * 2012-05-24 2013-12-04 上海强控设备工程有限公司 无压受油控制方法和装置
WO2014139813A1 (fr) * 2013-03-12 2014-09-18 Robert Bosch Gmbh Filtre à carburant sans pression en cas de remisage, pourvu d'une ventilation par l'intermédiaire d'une pompe à jet aspirant ou d'une soupape d'évacuation d'air

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3359960A (en) * 1964-12-21 1967-12-26 Gen Motors Corp Crankcase ventilation
US3439703A (en) * 1966-06-11 1969-04-22 Toyota Motor Co Ltd Flow control valve for blow-by gas
US3599667A (en) * 1969-02-18 1971-08-17 Filter Dynamics International Ventilation control valve
GB2014238A (en) * 1978-02-10 1979-08-22 Audi Ag Fuel Injection System for a Mixture Compressing I.C. Engine
GB2042074A (en) * 1979-02-09 1980-09-17 Audi Ag Fuel injection apparatus having means to prevent vapour lock
US4958657A (en) * 1989-05-11 1990-09-25 Umac Incorporated Gas supply safety device
US5551476A (en) * 1995-01-05 1996-09-03 Umac Incorporated Balanced-flow gas safety valve
US5613518A (en) * 1995-02-21 1997-03-25 Dresser Industries, Inc. Device for restricting excess flow
EP0864458A1 (fr) * 1997-03-10 1998-09-16 Robert Bosch Gmbh Dispositif d'alimentation de carburant pour un monteur à combustion
WO2002012761A1 (fr) * 2000-08-09 2002-02-14 Brightvalve, Llc Soupape anti-fuite
EP1750007A1 (fr) * 2005-08-02 2007-02-07 Robert Bosch Gmbh Système d'alimentation de carburant

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3359960A (en) * 1964-12-21 1967-12-26 Gen Motors Corp Crankcase ventilation
US3439703A (en) * 1966-06-11 1969-04-22 Toyota Motor Co Ltd Flow control valve for blow-by gas
US3599667A (en) * 1969-02-18 1971-08-17 Filter Dynamics International Ventilation control valve
GB2014238A (en) * 1978-02-10 1979-08-22 Audi Ag Fuel Injection System for a Mixture Compressing I.C. Engine
GB2042074A (en) * 1979-02-09 1980-09-17 Audi Ag Fuel injection apparatus having means to prevent vapour lock
US4958657A (en) * 1989-05-11 1990-09-25 Umac Incorporated Gas supply safety device
US5551476A (en) * 1995-01-05 1996-09-03 Umac Incorporated Balanced-flow gas safety valve
US5613518A (en) * 1995-02-21 1997-03-25 Dresser Industries, Inc. Device for restricting excess flow
EP0864458A1 (fr) * 1997-03-10 1998-09-16 Robert Bosch Gmbh Dispositif d'alimentation de carburant pour un monteur à combustion
WO2002012761A1 (fr) * 2000-08-09 2002-02-14 Brightvalve, Llc Soupape anti-fuite
EP1750007A1 (fr) * 2005-08-02 2007-02-07 Robert Bosch Gmbh Système d'alimentation de carburant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103419624A (zh) * 2012-05-24 2013-12-04 上海强控设备工程有限公司 无压受油控制方法和装置
WO2014139813A1 (fr) * 2013-03-12 2014-09-18 Robert Bosch Gmbh Filtre à carburant sans pression en cas de remisage, pourvu d'une ventilation par l'intermédiaire d'une pompe à jet aspirant ou d'une soupape d'évacuation d'air

Also Published As

Publication number Publication date
DE102007049144A1 (de) 2009-04-16
EP2209662A1 (fr) 2010-07-28

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