EP1137880B1 - Verfahren zum zumessen von brennstoff mit einem brennstoffeinspritzventil - Google Patents

Verfahren zum zumessen von brennstoff mit einem brennstoffeinspritzventil Download PDF

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Publication number
EP1137880B1
EP1137880B1 EP00979404A EP00979404A EP1137880B1 EP 1137880 B1 EP1137880 B1 EP 1137880B1 EP 00979404 A EP00979404 A EP 00979404A EP 00979404 A EP00979404 A EP 00979404A EP 1137880 B1 EP1137880 B1 EP 1137880B1
Authority
EP
European Patent Office
Prior art keywords
fuel
valve
swirl
opening rate
fuel injection
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
EP00979404A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1137880A1 (de
Inventor
Martin Maier
Guenther Hohl
Norbert Keim
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 EP1137880A1 publication Critical patent/EP1137880A1/de
Application granted granted Critical
Publication of EP1137880B1 publication Critical patent/EP1137880B1/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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices
    • F02M61/163—Means being injection-valves with helically or spirally shaped grooves
    • 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
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices

Definitions

  • the invention is based on a method for metering Fuel with a fuel injection valve after the Genus of the main claim.
  • a disadvantage of the known from DE 196 26 576 A1 Fuel injector is that the jet characteristics the sprayed fuel jet are structurally predetermined, so that only the metered amount of fuel, not but fuel distribution of fuel in one Combustion chamber into which the fuel is injected change.
  • Another disadvantage is that a change in the Beam field of the sprayed fuel an intervention in the manufacturing process of the fuel injection valve required, so that different Limited customer requirements.
  • the inventive method for metering fuel with a fuel injector with the characterizing Features of the main claim has the advantage over that the jet properties and thus the spray pattern of sprayed fuel without structural changes of Fuel injector vary so that the Fuel distribution of the fuel injection valve discharged fuel during operation of the Injector can change. It also covers that Fuel injector a wider scope resulting in improved engine performance.
  • the valve lift takes place with a low opening speed, so that the transition from the at least approximately swirl-free pre-flow to the Swirl flow is essentially continuous and the sprayed fuel in a spray area nearby a discharge end of the fuel injection valve is distributed at least approximately evenly.
  • the fuel has a low Speed, whereby the fuel is essentially in an ejection area in the vicinity of a discharge side End of the fuel injection valve is distributed.
  • the fuel can e.g. in the area of one Spark plug accumulated and distributed evenly there, so that an advantageous ignition of the fuel itself takes place at a low fuel quantity.
  • This procedure is especially suitable for small combustion chambers, in which a strong beam penetration is undesirable to the Wetting an inner wall of a combustion chamber of Internal combustion engine or a piston of the internal combustion engine to prevent.
  • valve lift with a high Opening speed occurs, so that the approx Swirl-free Vorströmung a slender, tubular Vorstrahl generated, the transition from the at least approximately swirl-free Vorströmung to the swirl flow substantially abruptly takes place and the swirl flow at the slim, tubular pre-jet adjoining, Conical, wide main beam generated.
  • This will be the sprayed off fuel spread over a large volume, wherein the fuel jet generated by the pre-flow a high directional injection velocity and the fuel flow generated by the swirl flow a high oriented perpendicular to the Abspritzraum Speed component has.
  • the opening speed at a substantially constant valve lift over a Variation of an opening time varies. It is the Opening time the time the operation of opening the Fuel injector needed. This is how it works the application of the method particularly simple.
  • the fuel in a combustion chamber a spark-ignited internal combustion engine injected directly and that the opening speed of a Operating mode of the internal combustion engine is affected.
  • a targeted control of the fuel injection valve can thereby during operation of the internal combustion engine for the respective operating point desired spray pattern for an optimal operating behavior of the internal combustion engine be set.
  • valve lift with a low Opening speed occurs and that at a Homogenous operation of the internal combustion engine, the valve lift with a high opening speed occurs.
  • the fuel mainly accumulated in the area of a spark plug, resulting in an advantageous ignition of the fuel make possible.
  • a homogeneous operation of Internal combustion engine becomes the fuel in the entire combustion chamber distributed, resulting in optimal mixing of the Fuel with the available in the Can reach internal combustion engine sucked air, so that Optimal combustion results.
  • Fig. 1 shows in an excerpt, axial Sectional view of a fuel injector 1.
  • the Fuel injector 1 is used in particular for direct Injecting fuel, especially gasoline, in a combustion chamber of a mixture-compressing, spark-ignited Internal combustion engine as so-called Gasoline direct injection valve.
  • the fuel injection valve 1 is in this embodiment as interior opening Fuel injection valve 1 executed.
  • fuel injector 1 is also suitable for other applications.
  • the fuel injection valve 1 has a valve housing 2, a valve seat body connected to this discharge side 3 and a closure plate 4, which at the the ejection-side end facing away from the valve housing 2 is connected.
  • the valve seat body 3 has a Valve seat surface 5, which with a valve closing body. 6 cooperates to a sealing seat.
  • the valve closing body 6 is actuated by a valve needle 7, which in the illustrated embodiment with the Valve-closing body 6 is integrally formed.
  • the fuel injection valve 1 is provided with a Fuel pump 8 connected, the fuel in one Fuel chamber 9 promotes inside the valve housing 2 and subjected to a fuel pressure. This takes place the connection of the fuel pump 8 with the valve housing. 2 the fuel injection valve 1 via a fuel line 10, with a connecting element 11 with the Fuel pump 8 and with a connecting element 12, the in the valve housing 2 of the fuel injection valve. 1 z. B. is screwed, with the fuel injection valve. 1 connected is.
  • the fuel injection valve 1 with a control circuit 13 for generating an electrical Signal connected to drive an actuator 14, wherein the Connection an electrical line 15, connecting elements 16, 17 and an electrical lead 18 includes.
  • the actuator 14 is piezoelectric or magnetostrictive executed.
  • the actor 14 is also executable as an electromagnet.
  • the actuator 14 has a central recess through which the Valve needle 7 extends.
  • the valve needle 7 with a pressure plate 19 is connected to which the actuator 14 is applied.
  • An actuator chamber 20 is against the fuel chamber 9 by a Guide member 21 sealed, which also serves to guide the Valve needle 7 upon actuation of the valve closing body 6 serves.
  • the actuator 14 is located on the one hand on the Guide element 21 and on the other hand on the pressure plate 19th at.
  • Fuel injection valve 1 in a cylinder head 24 a Internal combustion engine used.
  • the actuator 14 With a electrical control signal of the control circuit 13 which expands and one Ventilnadelhub the valve needle 7 generated opposite to the Abspritzraum 25 is directed, whereby the Valve closing body 6 of the valve seat surface 5 of the Valve seat body 3 lifts off and fuel from the Fuel chamber 9 via the between the valve closing body 6 and the valve seat 5 resulting gap in a Abspritzkanal 26 flows and from the spray channel 26 in a combustion chamber 28 of the cylinder 24 of the internal combustion engine is hosed.
  • the valve closing body 6 has at least a swirl groove 27, which forms a swirl element, so that when spraying fuel from the Fuel injection valve 1 is generated a swirl flow, which allows a better treatment of the fuel.
  • a swirl element 41 may also according to an alternative embodiment upstream of the Be arranged sealing seat, z. B. as a disk-shaped Swirl element 41 with tangentially extending swirl channels 42.
  • the extent of the actuator 14 is given, which is an opening speed of the valve closing body 6 can be influenced.
  • the opening speed is here by the time derivative of the valve lift the Valve needle 7, which is synonymous with a stroke of the Valve closing body 6, given.
  • the Fuel injection valve 1 is one of which by the Twist groove 27 given swirl generated swirl flow not constant and depends on the opening movement of the Valve needle 7 from. Therefore, by a variation of the Opening speed a spray pattern of the sprayed Fuel affects.
  • Figs. 2A to 2C and in Figs. 3A and 3B is the Spray pattern of one of the fuel injection valve. 1 Heated fuel exemplifies a high Opening speed and a low Opening speed shown.
  • Figs. 2A to 2C show the jet image of one of Fuel injection valve 1 sprayed fuel at a caused by the actuator 14 valve lift with a high Opening speed.
  • Fig. 2A shows the spray pattern of a sprayed Fuel after a time .DELTA.t after the start of opening.
  • This embodiment is the fuel injection valve 1 at this time already fully open. conditioned by the high fuel pressure of fuel in the Brennstoffkammmer 9, the fuel with a high Speed substantially in Abspritzcardi 25 hosed down the fuel injector 1, wherein the Swirl element 27 of the fuel injection valve 1 the Fuel flow initially not affected, so that a at least approximately swirl-free Vorströmung results, the one slender, tubular Vorstrahl 35 generated.
  • Fig. 2B shows the jet image of one of Fuel injector 1 sprayed fuel after a time 2 .DELTA.t after opening the fuel injection valve 1.
  • the slender, tubular Vorstrahl 35 has due to its high, directed in Abspritztechnisch 25 Speed is further moved in the injection direction 25, wherein he is due to a trained in Vorstrahl 35 different speed distribution in Abspritzraum 25 has extended.
  • the transition from the at least approximately swirl-free Vorströmung, the Vorstrahl 35 has generated, to one of the swirl elements 27th generated swirl flow is essentially jump-like, whereby a uniform, conical main jet 36th is generated, which adhere to the slim tubular Vorstrahl 35 connects abruptly.
  • the conical shape of the Main beam 36 with maximum width is due to that the swirl flow of the fuel is perpendicular to the Spray direction 25 oriented velocity component receives, wherein the swirl flow through the swirl elements 27th something is also throttled.
  • Fig. 2C shows the jet image of one of Fuel injector 1 sprayed fuel after a time 5 .DELTA.t after opening of the fuel injection valve 1.
  • Fuel with a fuel injection valve 1 can by Choosing a high opening speed a big one Spatial extent of the fuel injection valve. 1 Heated fuel can be achieved as it is in the Fig. 2A to 2C is shown.
  • Figs. 3A and 3B is a second embodiment of the method according to the invention, in which the Valve lift the valve needle 7 with a low Opening speed occurs.
  • Fig. 3A shows the jet image of the of Fuel injector 1 hosed fuel after a period of 2 ⁇ t after opening the Fuel injection valve 1.
  • Fuel injection valve 1 fully open. Since that Opening the fuel injection valve 1 in this Embodiment about half as fast as in the first embodiment (FIGS. 2A to 2C) results a different flow.
  • the slow opening is the between the exit of the swirl channels 27 and the Closing seat dormant fluid in the sealing seat severely throttled.
  • the overlap with the itself arises swirling flow forming a mixed flow, the is less twisted than in a pure swirl flow (see Figs. 2A-2C). This will spray in Spray direction 25 less stretched and spreads in area 38 less radially than in the cases according to Fig. 2B, 2C.
  • Fig. 3B shows the jet image of one of Fuel injector 1 hosed fuel after a period of time 5 ⁇ t after opening the Fuel Injector 1.
  • the Vorstrahl 35 has due its inner speed a smaller space area as the pre-beam 35 of the first embodiment (Fig. 2C).
  • the transition from the Vorstrahl 35 to the main beam 36 continuously, the Blast image in this embodiment in the area 38th is formed unevenly.
  • the spray pattern in Area 38 has a smaller diameter than the spray pattern of the first embodiment (FIG. 2C) in region 37.
  • the spray pattern of the sprayed fuel in particular its extension, by a variation of the Opening speed set.
  • the control circuit 13 generated control signal can in ongoing operation of the fuel injection valve 1 for the desired operating point desired spray pattern be set.
  • a variable fuel distribution e.g. in the Fig. 2C and 3B is shown, depending on a Operating mode of the fuel injection valve 1 by a Variation of the opening speed set.
  • the invention is not limited to those described Embodiments limited.
  • the Invention even with magnetically actuated Fuel injection valves find use, where by a appropriate power supply the respectively necessary Power structure can be accomplished.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
EP00979404A 1999-10-07 2000-10-05 Verfahren zum zumessen von brennstoff mit einem brennstoffeinspritzventil Expired - Lifetime EP1137880B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19948237 1999-10-07
DE19948237A DE19948237A1 (de) 1999-10-07 1999-10-07 Verfahren zum Zumessen von Brennstoff mit einem Brennstoffeinspritzventil
PCT/DE2000/003495 WO2001025619A1 (de) 1999-10-07 2000-10-05 Verfahren zum zumessen von brennstoff mit einem brennstoffeinspritzventil

Publications (2)

Publication Number Publication Date
EP1137880A1 EP1137880A1 (de) 2001-10-04
EP1137880B1 true EP1137880B1 (de) 2005-11-16

Family

ID=7924766

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00979404A Expired - Lifetime EP1137880B1 (de) 1999-10-07 2000-10-05 Verfahren zum zumessen von brennstoff mit einem brennstoffeinspritzventil

Country Status (6)

Country Link
US (1) US6543407B1 (cs)
EP (1) EP1137880B1 (cs)
JP (1) JP2003511608A (cs)
CZ (1) CZ20011994A3 (cs)
DE (2) DE19948237A1 (cs)
WO (1) WO2001025619A1 (cs)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10152416A1 (de) 2001-10-24 2003-06-18 Bosch Gmbh Robert Brennstoffeinspritzventil
DE102005054387A1 (de) * 2005-11-15 2007-05-16 Bosch Gmbh Robert Regeneration eines Partikelfilters durch Nacheinspritzung in Intervallen
FR2894631A1 (fr) * 2005-12-13 2007-06-15 Renault Sas Injecteur a vitesse de levee de soupape a aiguille variable et moteur comprenant un tel injecteur
US20130068200A1 (en) * 2011-09-15 2013-03-21 Paul Reynolds Injector Valve with Miniscule Actuator Displacement
JP6098613B2 (ja) 2014-10-30 2017-03-22 トヨタ自動車株式会社 内燃機関
DE102015205929A1 (de) * 2015-04-01 2016-10-06 Continental Automotive Gmbh Steuerungsverfahren für einen direktangetriebenen Piezo-Injektor

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3003411C2 (de) * 1980-01-31 1983-07-28 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg Selbstzündende Hubkolben-Brennkraftmaschine
US5392745A (en) * 1987-02-20 1995-02-28 Servojet Electric Systems, Ltd. Expanding cloud fuel injecting system
JP2819702B2 (ja) * 1989-12-12 1998-11-05 株式会社デンソー 燃料噴射弁
US5299919A (en) 1991-11-01 1994-04-05 Paul Marius A Fuel injector system
JP3544257B2 (ja) * 1995-11-07 2004-07-21 ヤマハ発動機株式会社 高圧縮比筒内噴射内燃機関
DE19626576A1 (de) 1996-07-02 1998-01-08 Bosch Gmbh Robert Brennstoffeinspritzventil
JPH10281039A (ja) 1997-04-02 1998-10-20 Hitachi Ltd 燃料噴射装置とその制御方法
JP3508537B2 (ja) 1998-03-12 2004-03-22 トヨタ自動車株式会社 内燃機関の燃料噴射装置
US6257197B1 (en) * 1998-09-29 2001-07-10 Mazda Motor Corporation Control system for a direct injection-spark ignition engine
US6269790B1 (en) * 1999-11-05 2001-08-07 Ford Global Technologies, Inc. Combustion chamber for DISI engines with exhaust side piston bowl

Also Published As

Publication number Publication date
CZ20011994A3 (cs) 2002-03-13
DE19948237A1 (de) 2001-04-12
DE50011635D1 (de) 2005-12-22
US6543407B1 (en) 2003-04-08
EP1137880A1 (de) 2001-10-04
WO2001025619A1 (de) 2001-04-12
JP2003511608A (ja) 2003-03-25

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