EP0828936B1 - Einspritzventil - Google Patents
Einspritzventil Download PDFInfo
- Publication number
- EP0828936B1 EP0828936B1 EP96914853A EP96914853A EP0828936B1 EP 0828936 B1 EP0828936 B1 EP 0828936B1 EP 96914853 A EP96914853 A EP 96914853A EP 96914853 A EP96914853 A EP 96914853A EP 0828936 B1 EP0828936 B1 EP 0828936B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle needle
- injection valve
- accordance
- tappet
- piston
- 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
Links
- 238000002347 injection Methods 0.000 title claims description 30
- 239000007924 injection Substances 0.000 title claims description 30
- 239000000446 fuel Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 2
- 230000036316 preload Effects 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
-
- 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
- F02M47/06—Other fuel 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
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
- F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
- F02M2200/704—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with actuator and actuated element moving in different directions, e.g. in opposite directions
Definitions
- the invention relates to an injection valve according to the preamble of claim 1.
- Such an injection valve is, for example, by EP-A 0 531 533 known.
- This publication deals with one Diesel injection device with a high-pressure system (common rail system), where the fuel is a high pressure accumulator is fed via a high pressure pump. This one under high Pressurized fuel is then controlled the individual cylinders of a diesel engine via injectors fed. The injectors each controlled by a solenoid valve, for example also enable individual injection times.
- the injectors are said to improve noise, etc. can be switched quickly at high injection pressures.
- high storage pressures when using a solenoid valve a pre-injection difficult because the switching times of the Solenoid valve are too long and the full stroke of the valve must be run through so that reproducible conditions, for example the injection quantity can be achieved.
- the formation of the injection rate i.e. slow opening, however, quickest closing of the nozzle needle, the shaping the injection rate according to a map can hardly be possible.
- a piezoelectrically actuated injection valve is known from US-A-5 335 861.
- the illustration shows an injection valve in section.
- the injector shown in the figure consists of an elongated housing 5, one on its lower end Union nut 3 is screwed on. With this cap nut 3 is an intermediate washer from the lower end of the housing 5 4 and a nozzle body 1, in which a nozzle needle 2 is kept. The washer 4 and the nozzle body 1 have a center hole in which the nozzle needle 2 is guided displaceably in the axial direction.
- a stepped plunger 7 is guided in the axial direction abuts the nozzle needle 2 at one end and at the other end with a secondary piston 14 of the piezoelectric drive device connected is.
- a first pressure chamber 8 is provided, which an inlet bore 9 with a fuel inlet connection 10 connected is.
- This high pressure inlet port 10 is also via an inlet bore 6 with a second pressure chamber 11 connected, in whose area the nozzle needle 2 is stepped, whereby a control surface for controlling the nozzle needle 2 is formed.
- the tappet 7 has a secondary piston 14 in connection, which is guided in a primary piston is.
- a piezo actuator 20 acts on the primary piston is stored in a closure 21 and opposite the actuator housing 12 is sealed by means of an O-ring 22.
- the closure 21 is in the axial direction by means of a locking ring 24 secured. Electrical connections 23 are for Actuator 20 out.
- the piezo actuator 20 acts on the primary piston 19 Disc spring 13. Next is in the recess of the secondary piston a spring 15 is provided which on an inner surface of the Primary piston 19 presses.
- the injector also has several at low pressure standing bores or rooms. So there is a room 16 in the area between the plunger 7 and one end of the nozzle needle 2. This space 16 is over a leakage hole 27 and 29 with a return 25 in connection.
- the Piezo Actuator-20 is arranged in a leakage space 26, which is also in the Return flows. This space 26 continues through a relief bore 18 in connection with a room 17, in which the spring 15 is arranged.
- the work area 28 in the area the plate spring 13 is always full of fuel, the due to the play between the upper area of the plunger 7 and the housing 5 penetrates into this space.
- the effective areas for printing are closed Nozzle designed so that the ring surface on the plunger 7 somewhat is smaller than the ring area on the pressure shoulder of the Nozzle needle 2. It therefore remains even when the nozzle is closed Nozzle needle 2 always has a resulting compressive force acts above, but is such that it depends on the spring force of the spring 15 is exceeded, whereby the nozzle needle 2 safely on their seat is pressed. In this position there is no Injection.
- the mentioned effective diameter of the ram 7 and the nozzle needle 2 are designed so that the Spring 15 designed for acceptable, small forces can be. However, the spring force must be so great that the Nozzle needle 2 quickly enough at the end of the injection Seat can be pressed. It should be borne in mind that them up during the injection of the nozzle seat works. A quick closing of the nozzle needle has an effect favorably on the exhaust gas values of the internal combustion engine.
- a piezo actuator offers the possibility of faster switching operations to realize as an electromagnet. Problematic are the small ways that a piezo actuator makes and therefore have to be translated.
- the plunger 7 to the housing 5 and the secondary piston 14 to Primary piston 19 and the primary piston 19 to the actuator housing 12 are paired with fits.
- One part of the leak goes towards the nozzle needle 2 and must pass through the leakage holes 29 and 27 are fed to the return.
- the other part of the leak arrives in the work space 28 and keeps it filled.
- Leakage fuel with excess flow passes on Secondary piston 14 along the relief bore 18 in the leakage space 26 and from there to the return line 25.
- the work space 28 is therefore always full of fuel.
- the Disc spring 13 presses the primary piston 19 with a defined one Biasing force against the piezo actuator 20 without play in the Starting position.
- the plunger 7 from the spring 15 via the secondary piston 14 after pressed down (no injection in this state).
- the piezo actuator 20 expands downward and moves the primary piston 19 against the force of the plate spring 13 also down.
- the volume of liquid in the Working space 28 is displaced and guides the secondary piston 14 with the plunger upwards, causing the nozzle needle 2 due the resulting pressure force is moved upwards.
- the start of injection is triggered.
- the return 25 is relieved to low pressure.
- Piezostacks are preferred which operate with relieve relatively small voltages in the vehicle.
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)
Description
Claims (7)
- Einspritzventil für Kraftstoffeinspritzsysteme, mit:einer in einem Ventilgehäuse (1) angeordneten Düsennadel (2) und einem zugeordneten Sitz, die zumindest eine Einspritzöffnung des Einspritzventils öffnen und schließen kann,einem Kraftstoffzulauf (10), der über einen ersten Druckraum (8) mit einer ersten Steuerfläche des die Düsennadel (2) antreibenden Stößels (7) und über einen zweiten Druckraum (11) mit einer zweiten Steuerfläche der Düsennadel (2) hydraulisch in Verbindung steht,
wobei die erste Steuerfläche größer als die zweite Steuerfläche ist und die erste Steuerfläche die Düsennadel (2) mit Druck in Richtung auf den zugeordneten Sitz beaufschlagt und die zweite Steuerfläche die Düsennadel mit Druck beaufschlagt, der die Düsennadel (2) vom Sitz abhebt,einer Ansteuereinrichtung, die über einen Primär- und Sekundärkolben (14,19) hydraulisch übersetzt ist und die die Düsennadel (2) steuert,
die Ansteuereinrichtung einen Piezoaktuator (20) aufweist, daß der Piezoaktuator (20) den Primärkolben (19) direkt antreibt, und daß die Düsennadel (2) über den Stößel (7) und den Sekundärkolben (14) direkt ansteuerbar ist. - Einspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß der Sekundärkolben (14) fest mit dem Stößel (7) verbunden ist und gegebenüber dem Primärkolben (19) über eine Feder (15) vorgespannt ist.
- Einspritzventil nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Feder (15) den Sekundärkolben (14) in Richtung auf die Düsennadel (2) vorspannt.
- Einspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß die Steuerflächen durch Ringflächen gebildet sind und die eine Ringfläche des Stößels (7) etwas kleiner als die andere Ringfläche an der Druckschulter der Düsennadel (2) ist, so daß immer eine resultierende Kraft in Richtung auf die Antriebsvorrichtung verbleibt.
- Einspritzventil nach Anspruch 4, dadurch gekennzeichnet, daß die resultierende Kraft kleiner ist als die Kraft der Feder (15), so daß die Düsennadel (2) bei inaktiver Ansteuereinrichtung auf ihren Sitz gedrückt wird.
- Einspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß der zwischen Primärkolben (19) und Sekundärkolben (14) gebildete Arbeitsraum (28) über einen Leckagestrom des Einspritzventils immer gefüllt ist.
- Einspritzventil nach Anspruch 6, dadurch gekennzeichnet, daß zwischen Stößel (7) und dem Gehäuse (5) sowie zwischen Primärkolben (19) und Sekundärkolben (14) sowie zwischen Primärkolben (19) und Gehäuse (12) Spalte vorgesehen sind, die so ausgelegt sind, daß dazwischen jeweils eine geringe Leckage stattfindet, so daß der Arbeitsraum (28) immer mit Flüssigkeit gefüllt ist, und daß bei Wärmedehnungen der Piezoaktuator eine spielausgeglichene, mit Druckspannung vorgespannte und eindeutig definierte Ausgangslage vor dem Anschalten einer elektrischen Spannung hat.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19519191A DE19519191C2 (de) | 1995-05-24 | 1995-05-24 | Einspritzventil |
DE19519191 | 1995-05-24 | ||
PCT/DE1996/000818 WO1996037698A1 (de) | 1995-05-24 | 1996-05-11 | Einspritzventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0828936A1 EP0828936A1 (de) | 1998-03-18 |
EP0828936B1 true EP0828936B1 (de) | 2000-03-22 |
Family
ID=7762838
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96914853A Expired - Lifetime EP0828936B1 (de) | 1995-05-24 | 1996-05-11 | Einspritzventil |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0828936B1 (de) |
DE (2) | DE19519191C2 (de) |
ES (1) | ES2145446T3 (de) |
WO (1) | WO1996037698A1 (de) |
Families Citing this family (53)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5884848A (en) * | 1997-05-09 | 1999-03-23 | Cummins Engine Company, Inc. | Fuel injector with piezoelectric and hydraulically actuated needle valve |
US5979803A (en) * | 1997-05-09 | 1999-11-09 | Cummins Engine Company | Fuel injector with pressure balanced needle valve |
DE19726125C2 (de) * | 1997-06-20 | 1999-04-15 | Telefunken Microelectron | Verfahren zur Einspritzung von Kraftstoff |
DE19727992C2 (de) * | 1997-07-01 | 1999-05-20 | Siemens Ag | Ausgleichselement zur Kompensation temperaturbedingter Längenänderungen von elektromechanischen Stellsystemen |
DE19742943C1 (de) * | 1997-09-29 | 1999-04-22 | Siemens Ag | Vorrichtung in einem Einspritzventil zum Halten einer formschlüssigen Verbindung |
DE19817320C1 (de) * | 1998-04-18 | 1999-11-11 | Daimler Chrysler Ag | Einspritzventil für Kraftstoffeinspritzsysteme |
DE19839125C1 (de) * | 1998-08-27 | 2000-04-20 | Siemens Ag | Vorrichtung und Verfahren zur Dosierung von Fluid |
DE19843578A1 (de) * | 1998-09-23 | 2000-03-30 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE19857338C1 (de) * | 1998-12-11 | 2000-10-05 | Siemens Ag | Dosiervorrichtung |
DE19858758C1 (de) | 1998-12-18 | 2000-09-07 | Siemens Ag | Vorrichtung und Verfahren zur Hubübertragung |
DE19907931A1 (de) * | 1999-02-24 | 2000-09-14 | Siemens Ag | Dosiervorrichtung |
DE19914714C2 (de) * | 1999-03-31 | 2001-09-20 | Siemens Ag | Injektor für Speicher-Kraftstoffeinspritzsysteme |
EP1046809B1 (de) | 1999-04-20 | 2005-08-10 | Siemens Aktiengesellschaft | Fluiddosiervorrichtung |
DE19942816A1 (de) * | 1999-09-08 | 2001-03-22 | Daimler Chrysler Ag | Einspritzventil |
DE19956830C2 (de) * | 1999-11-25 | 2002-07-18 | Siemens Ag | Durchführung |
DE10007735A1 (de) * | 2000-02-19 | 2001-09-06 | Daimler Chrysler Ag | Einspritzventil |
DE10029629A1 (de) * | 2000-06-15 | 2002-01-03 | Bosch Gmbh Robert | Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen |
DE10042231B4 (de) * | 2000-08-28 | 2004-09-30 | Siemens Ag | Einspspritzventil für die Einspritzung von Kraftstoff in eine Verbrennungskraftmaschine sowie Verfahren zur Steuerung des Öffnungs-und Schließvorgangs einer Düsennadel eines Einspritzventils |
DE10133265A1 (de) * | 2001-07-09 | 2003-01-23 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE10326046A1 (de) * | 2003-06-10 | 2004-12-30 | Robert Bosch Gmbh | Einspritzdüse für Brennkraftmaschinen |
WO2005026531A1 (de) * | 2003-09-10 | 2005-03-24 | Siemens Aktiengesellschaft | Einspritzventil für die einspritzung von kraftstoff in eine verbrennungskraftmaschine |
DE10343950B4 (de) * | 2003-09-23 | 2014-12-31 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE10353045A1 (de) * | 2003-11-13 | 2005-06-23 | Siemens Ag | Kraftstoffeinspritzventil |
DE102004005456A1 (de) | 2004-02-04 | 2005-08-25 | Robert Bosch Gmbh | Kraftstoffinjektor mit direktgesteuertem Einspritzventilglied |
DE102004010668B4 (de) * | 2004-03-04 | 2008-04-10 | Sonplas Gmbh | Verfahren und Vorrichtung zum Bearbeiten eines Bauteils |
DE102004021920A1 (de) | 2004-05-04 | 2005-12-01 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE102004031308B4 (de) * | 2004-06-29 | 2013-05-23 | Robert Bosch Gmbh | Hydraulischer Koppler |
DE102004035313A1 (de) | 2004-07-21 | 2006-02-16 | Robert Bosch Gmbh | Kraftstoffinjektor mit zweistufigem Übersetzer |
DE102004037124A1 (de) * | 2004-07-30 | 2006-03-23 | Robert Bosch Gmbh | Common-Rail-Injektor |
DE102004044461A1 (de) * | 2004-09-15 | 2006-03-30 | Robert Bosch Gmbh | Einspritzdüse |
DE102004045393B4 (de) * | 2004-09-18 | 2014-12-31 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE102005015997A1 (de) * | 2004-12-23 | 2006-07-13 | Robert Bosch Gmbh | Kraftstoffinjektor mit direkter Steuerung des Einspritzventilgliedes |
DE102005026514B4 (de) * | 2005-02-18 | 2008-12-24 | Robert Bosch Gmbh | Einspritzdüse |
DE102005009148A1 (de) | 2005-03-01 | 2006-09-07 | Robert Bosch Gmbh | Kraftstoffinjektor mit direktgesteuertem Einspritzventilglied mit Doppelsitz |
DE102005015731A1 (de) * | 2005-04-06 | 2006-10-12 | Robert Bosch Gmbh | Kraftstoffinjektor mit Piezoaktor |
DE102005016796A1 (de) * | 2005-04-12 | 2006-10-19 | Robert Bosch Gmbh | Zweistufig öffnender Kraftstoffinjektor |
DE102005025141B3 (de) * | 2005-06-01 | 2006-09-14 | Siemens Ag | Ventil |
DE102005036444A1 (de) * | 2005-08-03 | 2007-02-08 | Robert Bosch Gmbh | Einspritzdüse |
DE102005054739B4 (de) * | 2005-11-17 | 2017-06-08 | Robert Bosch Gmbh | Injektor zur Einspritzung von Kraftstoff in Brennräume von Brennkraftmaschinen, insbesondere piezoaktorgesteuerter Common-Rail-Injektor |
DE102006019308A1 (de) * | 2006-04-26 | 2007-10-31 | Robert Bosch Gmbh | Injektor |
DE102006026397A1 (de) * | 2006-06-07 | 2007-12-13 | Robert Bosch Gmbh | Vorrichtung zum Einspritzen von Kraftstoff |
DE102006027327B4 (de) | 2006-06-13 | 2018-08-02 | Robert Bosch Gmbh | Kraftstoffinjektor mit direkter Nadelsteuerung |
DE102006036780A1 (de) | 2006-08-07 | 2008-02-21 | Robert Bosch Gmbh | Krafstoffinjektor mit direkter Nadelsteuerung und Servoventil-Unterstützung |
JP4333757B2 (ja) | 2007-03-13 | 2009-09-16 | 株式会社デンソー | 燃料噴射弁 |
DE102007019528B3 (de) * | 2007-04-25 | 2008-09-11 | Siemens Ag | Druckkompensierbares Einspritzventil mit hydraulischem Übersetzer |
JP2009062910A (ja) * | 2007-09-07 | 2009-03-26 | Denso Corp | 燃料噴射弁 |
EP2083158A1 (de) * | 2008-01-22 | 2009-07-29 | Delphi Technologies, Inc. | Piezoelektrisch betätigtes Kraftstoffeinspritzventil und Betriebsverfahren dafür |
DE102008002412A1 (de) | 2008-06-13 | 2009-12-17 | Robert Bosch Gmbh | Kraftstoffinjektor |
DE102008040086A1 (de) | 2008-07-02 | 2010-01-07 | Robert Bosch Gmbh | Injektor zum Einspritzen von Kraftstoff |
DE102008035087B4 (de) * | 2008-07-28 | 2015-02-12 | Continental Automotive Gmbh | Einspritzventil |
DE102010040938A1 (de) * | 2010-09-17 | 2012-03-22 | Robert Bosch Gmbh | Kraftstoffinjektor |
DE102011088282A1 (de) * | 2011-12-12 | 2013-06-13 | Continental Automotive Gmbh | Einspritzventil |
GB201515892D0 (en) * | 2015-09-08 | 2015-10-21 | Delphi Int Operations Lux Srl | Hydraulic lash adjuster arranged in a servo injector |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4841936A (en) * | 1985-06-27 | 1989-06-27 | Toyota Jidosha Kabushiki Kaisha | Fuel injection control device of an internal combustion engine |
DE3936619A1 (de) * | 1989-11-03 | 1991-05-08 | Man Nutzfahrzeuge Ag | Verfahren zum einspritzen eines brennstoffes in einen brennraum einer luftverdichtenden, selbstzuendenden brennkraftmaschine, sowie vorrichtungen zur durchfuehrung dieses verfahrens |
JPH0486367A (ja) * | 1990-07-30 | 1992-03-18 | Aisin Seiki Co Ltd | 燃料噴射弁 |
DE4119467C2 (de) * | 1991-06-13 | 1996-10-17 | Daimler Benz Ag | Nach dem Verdrängerprinzip arbeitende Vorrichtung zur Kraft- und Hubübersetzung bzw. -übertragung |
JPH05180114A (ja) * | 1991-12-27 | 1993-07-20 | Aisin Seiki Co Ltd | 燃料噴射弁 |
DE4306073C1 (de) * | 1993-02-26 | 1994-06-01 | Siemens Ag | Zumeßvorrichtung für Fluide |
-
1995
- 1995-05-24 DE DE19519191A patent/DE19519191C2/de not_active Expired - Fee Related
-
1996
- 1996-05-11 EP EP96914853A patent/EP0828936B1/de not_active Expired - Lifetime
- 1996-05-11 WO PCT/DE1996/000818 patent/WO1996037698A1/de active IP Right Grant
- 1996-05-11 ES ES96914853T patent/ES2145446T3/es not_active Expired - Lifetime
- 1996-05-11 DE DE59604782T patent/DE59604782D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
WO1996037698A1 (de) | 1996-11-28 |
EP0828936A1 (de) | 1998-03-18 |
DE19519191C2 (de) | 1997-04-10 |
DE19519191A1 (de) | 1996-12-19 |
DE59604782D1 (de) | 2000-04-27 |
ES2145446T3 (es) | 2000-07-01 |
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