EP0959243B1 - Steuerventil für Kraftstoffeinspritzventil - Google Patents

Steuerventil für Kraftstoffeinspritzventil Download PDF

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Publication number
EP0959243B1
EP0959243B1 EP99109650A EP99109650A EP0959243B1 EP 0959243 B1 EP0959243 B1 EP 0959243B1 EP 99109650 A EP99109650 A EP 99109650A EP 99109650 A EP99109650 A EP 99109650A EP 0959243 B1 EP0959243 B1 EP 0959243B1
Authority
EP
European Patent Office
Prior art keywords
valve
valve body
control
control chamber
chamber
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
EP99109650A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0959243A1 (de
Inventor
Heinz Lixl
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP0959243A1 publication Critical patent/EP0959243A1/de
Application granted granted Critical
Publication of EP0959243B1 publication Critical patent/EP0959243B1/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
    • 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
    • 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
    • F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements

Definitions

  • the invention relates to an injection valve for injection containing fuel in an internal combustion engine a control valve mentioned in the preamble of claim 1 Art.
  • Such an injector is from EP-A-0 826 876 known.
  • injection systems are increasingly used, where with very high injection pressures.
  • Such injection systems are common rail systems (for diesel engines) and HPDI injection systems (for gasoline engines).
  • HPDI injection systems for gasoline engines.
  • These injection systems are characterized in that the Fuel with a high pressure pump in all cylinders the engine's common pressure reservoir is promoted by the from the injectors on the individual cylinders become.
  • the opening and closing of the injection valves is done in usually controlled electromagnetically, possibly with the help of piezo elements.
  • the control valve in the injection valve turns hydraulic opening and closing the actual fuel injector causes, in particular the beginning and the end of the injection process is precisely timed.
  • the injection valve should e.g. open in a controlled manner and at the end close the injection process quickly.
  • the injection should also smallest fuel quantities for pre-injection (pilot injection) possible before the actual injection with which the combustion process can be optimized.
  • EP-A-0 826 876 and EP-A-0 778 411 becomes a 2/2-way valve as a control valve for a common rail system used.
  • FIG. 1 of the drawing the known is shown schematically Injection valve with a 2/2-way valve explained as a control valve.
  • a common rail system the system pressure fuel from a high pressure accumulator (not shown) via a high pressure bore 1 and an inlet bore 2 with an inlet throttle 3 to a control chamber 4 out in the injection valve body 5.
  • the pressure there acts on the rear end of a movable nozzle body 6 with a nozzle needle 13 on the front End that has 6 injection holes when moving the nozzle body 7 in the injector body 5 opens and closes lead to the combustion chamber of the internal combustion engine.
  • a nozzle chamber 8 which is at the front end of the nozzle body 6 is formed in the injector body 5.
  • a bore 9 leads from the control chamber 4 in the injection valve body 5 with a discharge throttle 10 to one in the injection valve body 5 integrated control valve 12 in the form of a 2/2-way valve. From the control valve 12 there is no pressure Fuel return 14 to the fuel tank.
  • the control valve 12 is via a plunger 16 from an electromagnetic and / or piezoelectric actuator 18 controlled and actuated.
  • the control valve 12 controls the pressure in the control chamber 4 is exerted on the movable nozzle body 6. is the control valve 12 is closed, is in the control chamber 4th essentially the full system pressure so that the nozzle needle 13 at the front end of the nozzle body 6, the injection holes 7 closes, which lead into the combustion chamber. Becomes the actuator 18 electrically controlled, the plunger 16 exerts a force on the spring-loaded control valve 12. As a consequence of this the control valve 12 opens. With the control valve 12 open stands between high pressure accumulator, control chamber 4, control valve 12 and return 14 a steady flow. This flow leads to the individual throttles, the inlet throttle 3 and the outlet throttle 10, to a defined Pressure drop.
  • the pressure drop at the inlet throttle 3 and Flow restrictor 10 are each dimensioned so that the pressure reduced in the control chamber 4. This takes the in Control chamber 4 force acting on the nozzle body 6 while the pressure in the nozzle chamber 8 is equal to the system pressure remains, so that the injection valve hydraulically through the force exerted on the nozzle body 6 in the nozzle chamber 8 opens. This connects the nozzle chamber 8 with the Injection holes 7 made and the fuel in the Injected combustion chamber.
  • EP-A-0 778 411 proposed the control valve with a pressure compensation chamber and to provide a pressure compensation piston.
  • the control valve is still a hole in the injector body with a flow restrictor with the control chamber in Connection.
  • a further development of this arrangement is the drain hole in a movable, spring-loaded throttle piston attached, between the control chamber and control valve. The arrangement for controlling the nozzle body the injector is extremely expensive.
  • the invention is based, so the control valve to design that the tax forces to be applied with simple Structure of the valve are small.
  • the invention accordingly places in the injection valve body Integrated 2/2-way valve.
  • the control valve according to the invention is very simple, completely in the injector body integrates and requires little control force.
  • the special construction of the invention Control valve enables a minimization of the valve space volume. Form the control valve, throttles and injector body a compact unit. There are no springs or on the control valve Similar devices for the generation of prestressing are necessary.
  • the control valve according to the invention can be used for the smallest stroke movements lay out with a stroke of only 20 to 40 ⁇ m.
  • 2 is an injection valve with an inventive 2/2-way valve shown as a control valve.
  • the control chamber 4 of the injection valve via a high pressure bore 1 and an inlet bore 2 with an inlet throttle 3 in the injection valve body 5 with the High-pressure accumulator in connection, which is at system pressure.
  • the high pressure bore 1 continues to a nozzle chamber at the front end of the movable nozzle body 6, with its protrudes rear end into the control chamber 4 or one side the control chamber 4 forms.
  • FIG. 2 In the embodiment of FIG. 2 according to the invention that is Control valve 12 immediately adjacent to the control chamber 4 arranged. There is a recess in the injection valve body 5 for this purpose 30 is formed, which is opposite the nozzle body 6 or the bore intended for receiving the nozzle body 6 in the longitudinal direction of the injection valve body 5 from the Control chamber 4 extends away. In the recess 30 is a Valve body 20 used. Similar to the nozzle body 6 also the valve body 20 of the control valve 12 in the longitudinal direction of the injector body 5 movable, but sealing fitted into the recess 30.
  • the recess 30 is open to the control chamber 4 so that the valve body 20 inserted into the recess 30 projects into the control chamber 4 with a surface A 1 (its bottom surface) or forms a side of the control chamber 4 with this surface A 1 . As a rule, this side lies opposite the side of the control chamber 4 which is formed by the nozzle body 6.
  • a bore 40 is provided through which the plunger 16 of the electromagnetic and / or piezoelectric actuator (in 2 not shown).
  • the diameter of the Ram 16 is smaller than that of bore 40, and the bore 40 forms part of the unpressurized return through which the fuel from the control chamber 4 when the control valve is open 12 flows back into the fuel tank.
  • the bore 40 in turn has a smaller diameter than the recess 30.
  • the transition from the bore 40 in the Recess 30 is a valve seat 24 for the control valve 12 formed, on which when the control valve 12 is closed Sealing surface 22 on the top of the valve body 20, the on the side facing away from the control chamber 4 Valve body 20, comes to seal.
  • valve body 20 Subsequent to the sealing surface corresponding to the valve seat 24 22 has the valve body 20 on its outer circumference radial shoulder or a radial constriction 25.
  • the Constriction 25 widens in steps at a distance from the top of the valve body 20 and from the sealing surface 22 on the outer diameter of the valve body 20, the Corresponds to the inner diameter of the recess 30.
  • the constriction 25 together with a radial shoulder 32 on upper end of the recess 30 at the upper end of the control valve 12 a valve chamber 26 arise.
  • the constriction 25 has an annular active surface A 2 which lies opposite the active surface A 1 on the underside of the valve body 20 and which is smaller than this active surface A 1 .
  • the conditions are thus similar to that of the nozzle body 6, which moves up and down in consideration of the various active surfaces at its upper or lower end depending on the pressures in the control chamber 4 and the nozzle chamber 8.
  • a drain hole 27 with a Flow restrictor 28 integrated in the valve body 20.
  • the drain hole 27 with the drain throttle 28 extends from the control chamber 4 to the valve chamber 26, that is to say from that adjoining the control chamber 4 or in this projecting side of the valve body 20 the constriction 25.
  • valve body 20 of the control valve 12 is pressed against the valve seat 24 by the pressure in the control chamber 4, which practically corresponds to the system pressure, so that between the valve chamber 26 and the bore 40, the part of the unpressurized return to the fuel tank, there is no connection.
  • the pressure in the control chamber 4 which practically corresponds to the system pressure, so that between the valve chamber 26 and the bore 40, the part of the unpressurized return to the fuel tank, there is no connection.
  • the area A 1 over which the pressure acts on the valve body 20 from the side of the control chamber 4 is greater than the area A 2 over which the pressure in the valve chamber 26 acts in the opposite direction, the resulting force is directed towards the valve seat.
  • the system pressure in the control chamber 4 is also on the nozzle body 6 so that the nozzle needle at the front end of the nozzle body 6 is pressed into its seat and the connection to the injection holes 7 is interrupted. Consequently, none Fuel injected into the combustion chamber.
  • the stroke of the valve body 20 when lifting off the valve seat 24 and the movement of the nozzle body opposite to this movement 6 can be adjusted so that the underside of the valve body 20 on the top of the nozzle body 6 to the system comes. Since both are flat surfaces, the Bottom of the valve body 20 outlet bore 27 locked. As a result, essentially none flows More fuel through the return flow. Increased at the same time the pressure in the control chamber 4.
  • This measure has the advantage that the leakage current of the Injector and thus the unnecessarily delivered fuel quantity reduced. However, it does not have to be provided in every case become.
  • valve body 20 by the pressure in the control chamber 4, which is always is greater than the pressure in the unpressurized return connected valve chamber 26 to the valve seat 24 pressed. So that the connection to the bore 40 and unpressurized return flow interrupted, so that in the control chamber 4 can build up the full pressure again.
  • the pressure in the control chamber 4 leads to a force on the nozzle body 6 Direction to the seat of the nozzle needle, which is the nozzle needle again presses into their seat and ends the injection process.
  • the drain hole 27 runs with the drain throttle 28 from the bottom of the valve body 20, which to the Control chamber 4 adjacent, obliquely through the valve body 20 and opens directly into the constriction 25 below the sealing surface 22nd
  • valve body 20 shows an alternative embodiment of the valve body 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP99109650A 1998-05-19 1999-05-12 Steuerventil für Kraftstoffeinspritzventil Expired - Lifetime EP0959243B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19822503A DE19822503C1 (de) 1998-05-19 1998-05-19 Steuerventil für Kraftstoffeinspritzventil
DE19822503 1998-05-19

Publications (2)

Publication Number Publication Date
EP0959243A1 EP0959243A1 (de) 1999-11-24
EP0959243B1 true EP0959243B1 (de) 2003-11-12

Family

ID=7868319

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99109650A Expired - Lifetime EP0959243B1 (de) 1998-05-19 1999-05-12 Steuerventil für Kraftstoffeinspritzventil

Country Status (4)

Country Link
US (1) US6145492A (ja)
EP (1) EP0959243B1 (ja)
JP (1) JP2000008988A (ja)
DE (2) DE19822503C1 (ja)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19859537A1 (de) * 1998-12-22 2000-07-06 Bosch Gmbh Robert Kraftstoffeinspritzventil
DE19901057A1 (de) * 1999-01-14 2000-07-27 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19930530B4 (de) * 1999-07-01 2005-08-18 Siemens Ag Vorrichtung und Verfahren zum Regeln der Einspritzung von Kraftstoff durch einen Kraftstoffinjektor in einer Brennkraftmaschine
DE19940292B4 (de) * 1999-08-25 2008-03-06 Robert Bosch Gmbh Steuerventil für ein Kraftstoffeinspritzventil
DE10002705A1 (de) * 2000-01-22 2001-08-02 Bosch Gmbh Robert Vorrichtung und Verfahren zum Bereitstellen eines Systemdrucks in einer Einspritzeinrichtung
CN1091217C (zh) * 2000-02-17 2002-09-18 上海交通大学 仅控制喷油开始时刻的柴油机电控燃油喷射装置
DE10024662B4 (de) * 2000-05-18 2005-12-15 Siemens Ag Verfahren zum Betreiben eines Einspritzventils
DE10148874C2 (de) * 2001-10-04 2003-12-24 Siemens Ag Düseneinrichtung, insbesondere zur Kraftstoffeinspritzung
DE10149286C2 (de) * 2001-10-05 2003-12-11 Siemens Ag Düseneinrichtung, insbesondere zur Kraftstoffeinspritzung
JP2005508475A (ja) * 2001-11-09 2005-03-31 シーメンス　アクチエンゲゼルシヤフト 蓄圧式噴射システムのインジェクタのための制御モジュール
US6837221B2 (en) * 2001-12-11 2005-01-04 Cummins Inc. Fuel injector with feedback control
DE10218219A1 (de) * 2002-04-24 2003-11-06 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
WO2004005699A1 (de) * 2002-07-02 2004-01-15 Siemens Aktiengesellschaft Injektor für ein einspritzsystem
DE10355411B3 (de) * 2003-11-27 2005-07-14 Siemens Ag Einspritzanlage und Einspritzverfahren für eine Brennkraftmaschine
DE102004024527A1 (de) * 2004-05-18 2005-12-15 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung
JP2006090176A (ja) * 2004-09-22 2006-04-06 Denso Corp インジェクタ
DE102005024870A1 (de) * 2005-05-31 2006-12-07 Siemens Ag Injektor für eine Brennkraftmaschine
DE102005025139A1 (de) * 2005-06-01 2006-12-07 Siemens Ag Injektor für eine Brennkraftmaschine
DE102005026967B4 (de) * 2005-06-10 2014-09-25 Siemens Aktiengesellschaft Ventil, insbesondere Servoventil
US7464697B2 (en) * 2005-08-19 2008-12-16 The United States Of America, As Represented By The Administrator Of The U.S. Environmental Protection Agency High-pressure fuel intensifier system
FR2897396B1 (fr) * 2006-02-16 2008-03-21 Renault Sas Vanne de commande pour chambre de commande d'un injecteur a aiguille pour moteur a combustion interne
US7415969B2 (en) * 2006-02-28 2008-08-26 Caterpillar Inc. Fuel injector having recessed check top
DE102007035739A1 (de) * 2007-07-30 2009-02-05 Robert Bosch Gmbh Kraftstoffeinspritzventileinrichtung
DE102014215749A1 (de) * 2014-08-08 2016-02-11 Continental Automotive Gmbh Drosseleinrichtung zum Steuern einer einer Kraftstoff-Einspritzdüse zuzuführenden Kraftstoffmenge sowie Einspritzeinrichtung
CN104612873A (zh) * 2014-12-29 2015-05-13 沪东重机有限公司 船用低速机双电磁阀控制的重油高压共轨燃油喷射系统
JP6962039B2 (ja) * 2017-07-12 2021-11-05 株式会社デンソー 燃料噴射装置
US11933257B2 (en) * 2022-03-18 2024-03-19 Caterpillar Inc. Fuel injector lift control

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4899935A (en) * 1988-03-14 1990-02-13 Yamaha Hatsudoki Kabushiki Kaisha Valve support for accumulator type fuel injection nozzle
US5301875A (en) * 1990-06-19 1994-04-12 Cummins Engine Company, Inc. Force balanced electronically controlled fuel injector
US5647536A (en) * 1995-01-23 1997-07-15 Cummins Engine Company, Inc. Injection rate shaping nozzle assembly for a fuel injector
JP3446432B2 (ja) * 1995-12-05 2003-09-16 株式会社デンソー 燃料噴射装置
DE19624001A1 (de) * 1996-06-15 1997-12-18 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
JP3823391B2 (ja) * 1996-08-31 2006-09-20 いすゞ自動車株式会社 エンジンの燃料噴射装置
JPH1089190A (ja) * 1996-09-17 1998-04-07 Nippon Soken Inc 蓄圧式燃料噴射装置
US5860597A (en) * 1997-03-24 1999-01-19 Cummins Engine Company, Inc. Injection rate shaping nozzle assembly for a fuel injector
DE29708369U1 (de) * 1997-05-09 1997-07-10 FEV Motorentechnik GmbH & Co. KG, 52078 Aachen Steuerbares Einspritzventil für die Kraftstoffeinspritzung an Brennkraftmaschinen

Also Published As

Publication number Publication date
DE19822503C1 (de) 1999-11-25
JP2000008988A (ja) 2000-01-11
US6145492A (en) 2000-11-14
DE59907682D1 (de) 2003-12-18
EP0959243A1 (de) 1999-11-24

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