EP1314881A2 - Injecteur de carburant avec régulation du taux d'injection pour un système d'injection du type common-rail - Google Patents

Injecteur de carburant avec régulation du taux d'injection pour un système d'injection du type common-rail Download PDF

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Publication number
EP1314881A2
EP1314881A2 EP02024236A EP02024236A EP1314881A2 EP 1314881 A2 EP1314881 A2 EP 1314881A2 EP 02024236 A EP02024236 A EP 02024236A EP 02024236 A EP02024236 A EP 02024236A EP 1314881 A2 EP1314881 A2 EP 1314881A2
Authority
EP
European Patent Office
Prior art keywords
nozzle needle
control piston
control
valve
injector
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.)
Withdrawn
Application number
EP02024236A
Other languages
German (de)
English (en)
Other versions
EP1314881A3 (fr
Inventor
Rainer Buck
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 EP1314881A2 publication Critical patent/EP1314881A2/fr
Publication of EP1314881A3 publication Critical patent/EP1314881A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
    • F02M63/0007—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using electrically actuated valves
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/12—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship providing a continuous cyclic delivery with variable pressure
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure

Definitions

  • the invention is based on an injector for a common rail fuel injection system for internal combustion engines with an injection nozzle having a nozzle needle and with one of a spool in three sections divided control room, the first section and the second section over a arranged in the control piston Inlet throttle are hydraulically connected, the second section with a high pressure connection and the third section with an inlet channel to the nozzle needle is hydraulically connected, the control piston has two grooves and the control piston between the grooves is designed as a slide and when closed Injection nozzle with a control edge of the guide bore extensive hydraulic separation from High pressure connection and inlet duct to the nozzle needle and wherein the stroke of the nozzle needle and the stroke of the Control piston are coupled together.
  • the invention has for its object this from DE 199 63 920 A1 known injector further improve in particular the design options in the course of To enlarge pre, main and possibly post-injection, see above that overall improved consumption and Emission behavior of the internal combustion engine results.
  • an injector for a common rail fuel injection system for Internal combustion engines with a nozzle needle Injector and with one of a spool in three Sections divided control room, the first Section and the second section about an im Inlet spool arranged hydraulically in Are connected, the second section with a High pressure connection and the third section with one Inlet channel to the nozzle needle is hydraulically connected wherein the control piston has two grooves and the Control piston between the grooves designed as a slide and with a closed injector Control edge of the guide hole is largely hydraulic separation of high pressure connection and Inflows channel to the nozzle needle and the stroke of Nozzle needle and the stroke of the control piston with each other are coupled, solved in that between the High pressure connection or the second section and the Inlet channel to the nozzle needle one way valve lockable hydraulic connection is provided.
  • the Control piston axially displaceable in a guide bore is arranged that the nozzle needle in a Guide bore coaxial axial bore is slidably arranged and that the coupling of Control piston and nozzle needle via a valve piston he follows. Due to the coaxial arrangement of control pistons and Nozzle needle can apply the coupling forces directly and on be transferred easily. If necessary, can with the help of a valve piston, the distance between Control piston and nozzle needle are bridged.
  • valve pistons and Control piston or nozzle needle and control piston in one piece executed so that the number of components is reduced and misalignment can be avoided.
  • the directional control valve as an electrically operated 2/2-way valve, especially as an electrically operated slide valve, is formed because of such valve Responsiveness and tightness are sufficient and are easy to manufacture.
  • the reliability of the injector is increased if that Directional control valve is closed when de-energized.
  • Another variant provides that one against the housing of the injector and the nozzle needle supporting closing spring is present, so that also at the fuel injector is always safe is closed.
  • the closing spring can also do this contribute that the nozzle needle after a single activation of the solenoid valve closes again automatically by the hydraulic closing force is increased.
  • control piston acting auxiliary spring is present or / and that the inlet channel to the nozzle needle in connection with the fuel in it serves as a pressure accumulator, so that, especially with the main injection, it is ensured that the control piston has such a large Hub executes that there is no overlap between slider and Control edge is more and thus the injector of the injector with the full pressure of the fuel is applied. This will quickly open the Injector allows and it can be in a short time large amounts of fuel are injected.
  • a high-pressure connection 1 supplies a control room 3 with in 1 and 2 fuel, not shown.
  • On the Control room 3 and an inlet channel to the nozzle needle 5 also supplies an injector 7 with fuel.
  • the control chamber 3 is radial from a guide bore 9 limited.
  • an axial displaceable control piston 11 available in the guide bore 9.
  • the control piston divides the control room 3 into three sections 13, 15 and 17.
  • the first section 13 of the control room 3 is of a first end face 18 of the control piston 11 in the axial Direction limited.
  • the first section 13 of the Control room 3 is connected to the inlet throttle 19 second section 15 of the control room 3 hydraulically connected.
  • the inlet throttle 19 can be used as a groove or as Bore.
  • Via a flow restrictor 21, the by a solenoid valve, not shown controlled ball 22 can be opened is the first Section 13 with a likewise not shown Fuel return connected.
  • the control piston 11 has two grooves 23, 25, which the second section 15 and the third section 17 of Radially limit control room 3. Between the grooves 23, 25 a slide 27 is arranged.
  • the nozzle needle 31 has a cross-sectional change 35 from a larger diameter 37 to a smaller one Diameter 39 on. With its larger diameter 37 the nozzle needle 31 in a housing 41 of the injector guided. The cross-sectional change 35 limits one Pressure chamber 43 of the injector 7.
  • the slide separates 27 the third section 17 of the control room 3 and thus also that of the third section 17 of the control room 3 budding inlet channel to the nozzle needle 5 from High pressure connection 1.
  • the overlap 45 of slide 27 and a control edge 47 of the guide bore 9 and the Fit between slide 27 and guide bore 9 are so chosen that also in this position of the slide 27th Some leakage occurs between injections and thus in the pressure chamber 43 the same pressure as in High pressure connection 1 prevails.
  • a suitable design of the injector can also be used Pre-injection with low injection pressure and lower Injection quantity can be brought about.
  • the force of the closing spring 49 and that on the first Front surface 18 acting hydraulic force may be greater than the hydraulic acting on the cross-sectional change 35 Force.
  • By throttling between slide 27 and Control edge 47 can the pressure in the pressure chamber 43 so far decrease that the above Condition occurs. With it result yourself additional options in the design of the Course of the main injection and the pre-injection.
  • Pre-injection with a single activation of the not shown solenoid valve can be achieved.
  • the hydraulic connection 55 also the high pressure connection 1 with the inlet channel Connect nozzle needle 5 (not shown).
  • the hydraulic connection 55 is an electrically operated 2/2-way valve 57 arranged. If the 2/2-way valve 57, as shown in Figs. 1 and 2, is closed hydraulic connection 55 has no influence on the behavior of the injector.
  • Another advantage of this injector is that the overlap 45 between the slide 27 and the control edge 47 when the injector is closed 7 leaks between Nozzle needle 31 and nozzle needle seat 34, for example by small chips or the like, greatly reduced. So that's one increased security against a faulty, permanent Fuel flow into the combustion chamber (internal leakage).
  • the flow restrictor 21 through the ball 22 in a manner not explained in detail locked.
  • By closing the flow restrictor 21 builds in the first section 13 of the valve control chamber 3 About the inlet throttle 19 again approximately in High pressure connection 1 prevailing pressure. That pressure exercises over the first end face 18 of the control piston 9 the valve piston 33 a hydraulic force on the Nozzle needle 31 out. Once this hydraulic force hits the the cross-sectional change 35 acting hydraulic force exceeds, the nozzle needle closes 31. Because of the im Comparison to the ring area of the cross-sectional change 35 significantly larger first end face 18 of the control piston 9 the closing movement takes place very quickly and with great force Force.
  • control quantity required in addition to the fuel quantity injected into the combustion chamber reaches the fuel return via the inlet throttle 19, the control chamber 3 and the outlet throttle 21.
  • control quantity there is also a leak at the nozzle needle guide.
  • the control and leakage quantities can be up to 50 mm 3 / stroke. They are also discharged back into the fuel return, not shown, via the outlet throttle 21.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)
EP02024236A 2001-11-27 2002-10-31 Injecteur de carburant avec régulation du taux d'injection pour un système d'injection du type common-rail Withdrawn EP1314881A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10158028 2001-11-27
DE10158028A DE10158028A1 (de) 2001-11-27 2001-11-27 Injektor für ein Common-Rail-Kraftstoffeinspritzsystem mit Einspritzverlaufsformung

Publications (2)

Publication Number Publication Date
EP1314881A2 true EP1314881A2 (fr) 2003-05-28
EP1314881A3 EP1314881A3 (fr) 2006-03-22

Family

ID=7707048

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02024236A Withdrawn EP1314881A3 (fr) 2001-11-27 2002-10-31 Injecteur de carburant avec régulation du taux d'injection pour un système d'injection du type common-rail

Country Status (4)

Country Link
US (1) US6758417B2 (fr)
EP (1) EP1314881A3 (fr)
JP (1) JP2003184705A (fr)
DE (1) DE10158028A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2177744A1 (fr) * 2007-12-05 2010-04-21 Mitsubishi Heavy Industries, Ltd. Soupape d'injection de carburant pour dispositif d'injection de carburant du type accumulation de pression
DE102010063981A1 (de) 2010-12-22 2012-06-28 Continental Automotive Gmbh Magnetodynamischer Aktor und Verfahren zur Betätigung eines Kraftstoffeinspritzventils

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10160263A1 (de) * 2001-12-07 2003-06-18 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
ATE375446T1 (de) 2004-01-13 2007-10-15 Delphi Tech Inc Kraftstoffeinspritzventil
FI119120B (fi) 2004-01-23 2008-07-31 Waertsilae Finland Oy Laitteisto ja menetelmä polttoaineen ruiskutuspaineen muokkaamiseksi
US20090118612A1 (en) 2005-05-06 2009-05-07 Sorin Grunwald Apparatus and Method for Vascular Access
EP2170162B1 (fr) 2007-06-26 2017-08-23 Vasonova, Inc. Appareil de guidage et de positionnement d'un dispositif endovasculaire à l'aide de paramètres physiologiques
JP5120293B2 (ja) * 2009-02-20 2013-01-16 株式会社デンソー 燃料噴射弁
US8628031B2 (en) * 2010-01-07 2014-01-14 Sturman Industries, Inc. Method and apparatus for controlling needle seat load in very high pressure diesel injectors

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19963920A1 (de) 1999-12-31 2001-07-12 Bosch Gmbh Robert Injektor für ein Common-Rail-Kraftstoffeinspritzsystem mit schiebergesteuertem Zulaufkanal und direkter Kopplung von Steuerkolben und Düsenkanal

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3105205A1 (de) * 1981-02-13 1982-12-30 Günter 8543 Hilpoltstein Elsbett Kolbenpumpe zum foerdern von fluessigkeiten, insbesondere kraftstoff fuer hubkolben-brennkraftmaschinen
JP2636361B2 (ja) * 1988-09-21 1997-07-30 トヨタ自動車株式会社 ユニットインジェクタ
IT1232027B (it) * 1989-03-03 1992-01-23 Weber Srl Perfezionamento ai dispositivi di iniezione del combustibile ad azio namento elettromagnetico per motori a ciclo diesel
US5397055A (en) * 1991-11-01 1995-03-14 Paul; Marius A. Fuel injector system
AT1626U1 (de) * 1995-04-05 1997-08-25 Avl Verbrennungskraft Messtech Speichereinspritzsystem für brennkraftmaschinen
GB9905896D0 (en) * 1999-03-16 1999-05-05 Lucas Ind Plc Fuel injector arrangement
DE10002704A1 (de) * 2000-01-22 2001-08-02 Bosch Gmbh Robert Einspritzeinrichtung und Verfahren zum Einspritzen von Fluid
US6685160B2 (en) * 2001-07-30 2004-02-03 Caterpillar Inc Dual solenoid latching actuator and method of using same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19963920A1 (de) 1999-12-31 2001-07-12 Bosch Gmbh Robert Injektor für ein Common-Rail-Kraftstoffeinspritzsystem mit schiebergesteuertem Zulaufkanal und direkter Kopplung von Steuerkolben und Düsenkanal

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2177744A1 (fr) * 2007-12-05 2010-04-21 Mitsubishi Heavy Industries, Ltd. Soupape d'injection de carburant pour dispositif d'injection de carburant du type accumulation de pression
EP2177744A4 (fr) * 2007-12-05 2011-04-06 Mitsubishi Heavy Ind Ltd Soupape d'injection de carburant pour dispositif d'injection de carburant du type accumulation de pression
US8602322B2 (en) 2007-12-05 2013-12-10 Mitsubishi Heavy Industries, Ltd. Fuel injection valve of accumulator injection system
DE102010063981A1 (de) 2010-12-22 2012-06-28 Continental Automotive Gmbh Magnetodynamischer Aktor und Verfahren zur Betätigung eines Kraftstoffeinspritzventils
WO2012084682A1 (fr) 2010-12-22 2012-06-28 Continental Automotive Gmbh Actionneur magnétodynamique et procédé pour actionner une soupape d'injection de carburant

Also Published As

Publication number Publication date
US6758417B2 (en) 2004-07-06
DE10158028A1 (de) 2003-06-12
EP1314881A3 (fr) 2006-03-22
JP2003184705A (ja) 2003-07-03
US20030111548A1 (en) 2003-06-19

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