WO2004111437A1 - Dispositif pour regler une section d'ecoulement variable - Google Patents

Dispositif pour regler une section d'ecoulement variable Download PDF

Info

Publication number
WO2004111437A1
WO2004111437A1 PCT/DE2004/000685 DE2004000685W WO2004111437A1 WO 2004111437 A1 WO2004111437 A1 WO 2004111437A1 DE 2004000685 W DE2004000685 W DE 2004000685W WO 2004111437 A1 WO2004111437 A1 WO 2004111437A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve member
fuel
valve
flow cross
section
Prior art date
Application number
PCT/DE2004/000685
Other languages
German (de)
English (en)
Inventor
Sascha Ambrock
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 DE502004004245T priority Critical patent/DE502004004245D1/de
Priority to EP04725275A priority patent/EP1631741B1/fr
Publication of WO2004111437A1 publication Critical patent/WO2004111437A1/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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/0275—Arrangement of common rails
    • F02M63/028—Returnless common rail 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/02—Fuel-injection apparatus having means for reducing wear

Definitions

  • the invention relates to a device for setting a variable flow cross-section according to the preamble of claim 1.
  • Such a device is known from DE 198 53 103 Al.
  • This device is used to set a variable flow cross section in a fuel connection of a fuel injection device of an internal combustion engine.
  • the device has an electrical actuator in the form of an electromagnet and a control valve actuated by it.
  • the control valve has a hollow valve member which is guided in a cylinder bore of a valve housing and which can be displaced by the actuator against a restoring force.
  • the valve member controls a flow cross-section in cooperation with at least one opening opening on the jacket of the cylinder bore.
  • Fuel under pressure flows into the interior of the valve member and fuel flows out of the control valve through at least one opening in the jacket of the valve member and the at least one opening in the jacket of the cylinder bore.
  • the device is arranged between a feed pump and a high-pressure pump in order to ensure a variable flow cross-section between the feed pump and the high-pressure pump and thus variable intake quantities of fuel in the
  • the high-pressure pump delivers fuel to a store from which fuel is taken for injection at the internal combustion engine.
  • a relatively high friction occurs between the valve member and the cylinder bore, which leads to a strong hysteresis in the movement of the valve member and corresponding hysteresis in the setting of the
  • the device according to the invention with the features according to claim 1 has the advantage that the at least one groove on the valve member enables lubrication between the valve member and the cylinder bore, since the groove is supplied with fuel under pressure from the interior of the valve member. This reduces the friction between the valve member and the cylinder bore, thereby improving the function of the device and reducing wear.
  • Fuel injection device for an internal combustion engine in a schematic representation, Figure 2 in an enlarged view, a device for setting a variable flow cross-section of the
  • FIG. 1 shows a fuel injection device for an internal combustion engine, for example of a motor vehicle.
  • the internal combustion engine is preferably a self-igniting internal combustion engine and has one or more cylinders.
  • the motor vehicle has one
  • the fuel injection device has a feed pump 12, through which fuel is fed from the fuel tank 10 to at least one high-pressure pump 14.
  • the high-pressure pump 14 pumps fuel into a reservoir 16, which can be tubular, for example, or in any other form.
  • Lines 18 lead from the store 16 to injectors 20 arranged on the cylinders of the internal combustion engine.
  • An electrical control valve 22 is arranged on each of the injectors 20, through which an opening of the injectors is controlled, in order to thus effect fuel injection by the respective injector 20 or to prevent fuel injection.
  • the control valves 22 are controlled by an electronic one
  • Control device 23 is controlled by which the time and duration of the fuel injection by the injectors 20 is determined as a function of operating parameters of the internal combustion engine, such as speed, load, temperature and others. - A -
  • the high pressure pump 14 is mechanically driven by the internal combustion engine and thus proportional to the speed of the internal combustion engine.
  • the feed pump 12 can also be driven mechanically by the internal combustion engine, wherein a common drive shaft can be provided for the high pressure pump 14 and the feed pump 12.
  • the feed pump 12 may alternatively also have an electric motor drive, for example.
  • the high-pressure pump 14 can be designed as a radial piston pump and has at least one or more pump elements.
  • a device 44 is arranged between the feed pump 12 and the high-pressure pump 14, by means of which a variable flow cross section can be set and which forms a fuel metering device here.
  • the fuel metering device 44 has a control valve 46 actuated by an electrical actuator 45, for example an electromagnet or a piezo actuator, by means of which the flow cross-section from the feed pump 12 to the high-pressure pump 14 is continuously adjustable.
  • the fuel metering device 44 is also controlled by the control device 23 in such a way that a fuel quantity is supplied to the high-pressure pump 14 by the feed pump 12, which in turn is then supplied by the
  • High-pressure pump 14 is conveyed under high pressure into the accumulator 16 in order to maintain a predetermined pressure in the accumulator 16 which is dependent on the operating parameters of the internal combustion engine.
  • a pressure sensor 17 is arranged on the accumulator 16, which is connected to the control device 23 and which supplies a signal for the actual pressure in the accumulator 16.
  • the fuel metering device 44 is shown enlarged in accordance with an exemplary embodiment.
  • the fuel metering device 44 is part of the Control valve 46 a valve housing 50, in which a valve member 54 formed as a hollow piston is slidably guided in a cylinder bore 52.
  • the valve member 54 can be pot-shaped and have a bottom with at least one opening at one end.
  • Valve housing 50 can form a magnetic core of actuator 45 designed as an electromagnet. At least one opening 56 opens at the jacket of the cylinder bore 52 and forms a connection to the high-pressure pump 14. A circumferential annular groove 58 is formed in the cylinder bore 52, into which the at least one opening 56 opens.
  • the cylinder bore 52 is designed as a blind bore in the valve housing 50 and is closed at its open end with a cover 60 inserted into it, for example pressed or screwed in.
  • the cover 60 has an opening 62 which forms a connection to the feed pump 12. The fuel delivered by the feed pump 12 thus flows into the cylinder bore 52 and into the interior of the hollow valve member 54 through the opening 62 in the cover 60.
  • the valve member 54 has in its jacket at least one, preferably a plurality of openings 64 arranged distributed over its circumference.
  • the openings 64 are designed, for example, in such a way that they become narrower in the axial direction towards the end region of the valve member 54 facing away from the cover 60.
  • the openings 64 can also have any other shape.
  • a prestressed spring 66 is clamped between the cover 60 and the valve member 54, by means of which the valve member 54 is pressed away from the cover 60.
  • the actuator 45 acts on the bottom thereof at least indirectly, for example via a rod 68. If the actuator 45 is not actuated, that is to say is de-energized, the valve member 54 is pressed away from the cover 60 by the spring 66, the openings 64 in the valve member 54 with the annular groove 58 then being the same Largely cover cylinder bore 52, so that a large flow cross section for the fuel from feed pump 12 to high-pressure pump 14 is released.
  • the valve member 54 When the actuator 45 is actuated, that is to say energized, the valve member 54 is displaced towards the cover 60 against the force of the spring 66. When the valve member 54 is displaced, the openings 64 of the valve member 54 overlap less and less with the annular groove 48 of the cylinder bore 52, so that an increasingly smaller flow cross section for the fuel is released from the feed pump 12 to the high-pressure pump 14.
  • the released flow cross section is proportional to the position of the valve member 54, which in turn is proportional to the actuation, in particular the current strength, of the actuator 45.
  • the shape of the openings 64 in the valve member 54 can influence the change in the size of the released flow cross-section when the valve member 54 is shifted, and thus a desired characteristic curve of the device can be achieved. With the narrowing openings 64, a non-linear characteristic curve of the device is achieved, the
  • Flow cross section is disproportionately reduced with increasing displacement of the valve member 54 to the cover 60.
  • the valve member 54 is moved so far towards the cover 60 that its openings 64 no longer overlap with the annular groove 58 of the cylinder bore 52 and the flow cross section is at least approximately completely closed.
  • the openings 64 in the valve member 54 can also be omitted, the size of the flow cross-section then being controlled by the end of the jacket of the valve member 54 due to its different overlap with the annular groove 58 of the valve housing 50.
  • the valve member 54 has in its jacket at least one groove 70 which extends at least over part of its circumference.
  • the groove 70 is as Forms annular groove extending over the entire circumference of the valve member 54.
  • At least two grooves 70 are preferably provided, each of which is arranged near an axial end region of the valve member 54.
  • the groove 70 arranged near the end region of the valve member 54 facing the cover 60 is arranged at an axial distance from the openings 64 and does not overlap them.
  • the grooves 70 are each connected to the interior of the valve member 54 via at least one bore 72.
  • the pressure generated by the feed pump 12 prevails in the interior of the valve member 54, so that fuel under pressure is constantly supplied to the grooves 70 of the valve member 54 from the interior of the valve member 54. This ensures good lubrication between the valve member 54 and the cylinder bore 52 and thus low friction and wear.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un dispositif servant à régler une section d'écoulement variable dans une liaison de carburant d'un dispositif d'injection de carburant pour un moteur à combustion interne. Le dispositif selon l'invention comprend un actionneur électrique (45) et une soupape de régulation (46) qui est actionnée par cet actionneur électrique et qui présente un élément de soupape creux (54) guidé dans un alésage de cylindre (52) d'un carter de soupape (50) et pouvant être déplacé par l'actionneur (45) à l'encontre d'une force de rappel (66). L'élément de soupape (54) commande une section d'écoulement à l'aide d'au moins une ouverture (64) réalisée dans son enveloppe, en coopération avec au moins une ouverture (56) débouchant au niveau de l'enveloppe de l'alésage de cylindre (52). Le dispositif selon l'invention est caractérisé en ce que du carburant sous pression est amené à la soupape de régulation (46) dans l'alésage de cylindre (52) et dans l'intérieur de l'élément de soupape (54) et en ce que ce carburant s'écoule hors de la soupape de régulation (46) à travers l'ouverture (64) dans l'élément de soupape (54) et l'ouverture (56) débouchant sur l'enveloppe de l'alésage de cylindre (52). L'élément de soupape (54) présente, sur son enveloppe, au moins une rainure (70) s'étendant sur au moins une partie de sa circonférence et reliée à l'espace intérieur de l'élément de soupape (54).
PCT/DE2004/000685 2003-05-27 2004-04-02 Dispositif pour regler une section d'ecoulement variable WO2004111437A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE502004004245T DE502004004245D1 (de) 2003-05-27 2004-04-02 Einrichtung zur einstellung eines veränderlichen durchflussq uerschnitts
EP04725275A EP1631741B1 (fr) 2003-05-27 2004-04-02 Dispositif pour regler une section d'ecoulement variable

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10324010.1 2003-05-27
DE10324010A DE10324010A1 (de) 2003-05-27 2003-05-27 Einrichtung zur Einstellung eines veränderlichen Durchflussquerschnitts

Publications (1)

Publication Number Publication Date
WO2004111437A1 true WO2004111437A1 (fr) 2004-12-23

Family

ID=33441358

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2004/000685 WO2004111437A1 (fr) 2003-05-27 2004-04-02 Dispositif pour regler une section d'ecoulement variable

Country Status (3)

Country Link
EP (1) EP1631741B1 (fr)
DE (2) DE10324010A1 (fr)
WO (1) WO2004111437A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012155162A1 (fr) * 2011-05-18 2012-11-22 Robert Bosch Gmbh Ensemble pompe à haute pression destinée à pomper du carburant depuis un réservoir dans un récipient à haute pression
WO2015110242A1 (fr) * 2014-01-27 2015-07-30 Robert Bosch Gmbh Vanne à commande électromagnétique pour pompe à haute pression ainsi que pompe à haute pression

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007000077B4 (de) 2006-02-08 2018-06-28 Denso Corporation Kraftstoffeinspritzsystem für einen Verbrennungsmotor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5092299A (en) * 1990-11-30 1992-03-03 Cummins Engine Company, Inc. Air fuel control for a PT fuel system
US5639066A (en) * 1995-06-15 1997-06-17 Applied Power Inc. Bidirectional flow control valve
US6446606B1 (en) * 1998-11-18 2002-09-10 Robert Bosch Gmbh Metering unit for a fuel injection system for internal combustion engines
JP2003120468A (ja) * 2001-10-15 2003-04-23 Bosch Automotive Systems Corp 燃料液流量調節弁、及び該燃料液流量調節弁を備えた内燃機関の燃料噴射システム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5092299A (en) * 1990-11-30 1992-03-03 Cummins Engine Company, Inc. Air fuel control for a PT fuel system
US5639066A (en) * 1995-06-15 1997-06-17 Applied Power Inc. Bidirectional flow control valve
US6446606B1 (en) * 1998-11-18 2002-09-10 Robert Bosch Gmbh Metering unit for a fuel injection system for internal combustion engines
JP2003120468A (ja) * 2001-10-15 2003-04-23 Bosch Automotive Systems Corp 燃料液流量調節弁、及び該燃料液流量調節弁を備えた内燃機関の燃料噴射システム

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 08 6 August 2003 (2003-08-06) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012155162A1 (fr) * 2011-05-18 2012-11-22 Robert Bosch Gmbh Ensemble pompe à haute pression destinée à pomper du carburant depuis un réservoir dans un récipient à haute pression
WO2015110242A1 (fr) * 2014-01-27 2015-07-30 Robert Bosch Gmbh Vanne à commande électromagnétique pour pompe à haute pression ainsi que pompe à haute pression

Also Published As

Publication number Publication date
EP1631741B1 (fr) 2007-07-04
DE10324010A1 (de) 2004-12-16
DE502004004245D1 (de) 2007-08-16
EP1631741A1 (fr) 2006-03-08

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