EP1056946B1 - Kraftstoffeinspritzventil - Google Patents
Kraftstoffeinspritzventil Download PDFInfo
- Publication number
- EP1056946B1 EP1056946B1 EP99966843A EP99966843A EP1056946B1 EP 1056946 B1 EP1056946 B1 EP 1056946B1 EP 99966843 A EP99966843 A EP 99966843A EP 99966843 A EP99966843 A EP 99966843A EP 1056946 B1 EP1056946 B1 EP 1056946B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- throttle hole
- fuel injection
- fuel
- injection valve
- control space
- 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
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
- 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
-
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/008—Arrangement of fuel passages inside of injectors
Definitions
- the present invention relates to a fuel injection valve in particular for High-pressure injection of fuel into combustion chambers of internal combustion engines.
- To open and close the injectors is at Common Rail injection systems, among others, resorted to the servo principle.
- the injection nozzle is part of a servo valve.
- a switching valve which is electrically controlled, a volume flow is switched.
- a pressure divider which is formed by two Naturalflußwideretcn causes an opened switching valve an opening movement of the servo valve.
- a closed one Switching valve causes a closing movement of the servo valve.
- the present invention is therefore based on the object, a fuel injection valve with a combination of switching valve and servohydraulic valve to create at a well-defined flow resistance of the switching valve in a wide range of different fuel pressures available is.
- This flow resistance must also have the property that only a few geometry parameters affect its size. The exact one defined flow resistance of the switching valve thus sets the opening speed of the servo valve.
- the fuel injection valve according to the invention with the features of claim 1 has the advantage that the effective flow cross section of the.
- the Switching valve produced opening the formation of a cavitating throttle flow supported. Due to the eccentric position of the inlet throttle bore is causes a rotation of the fuel flow in the control room. This rotation, due to the momentum conservation of the fuel flow after opening the Switching valve accelerates when flowing through the outlet throttle bore leads to a lowering of the static pressure in the liquid and thus amplifies the Cavitation tendency of the fluid flowing through the outlet throttle bore. Due to the swirling flow within the outlet throttle bore is the cavitation tendency is extended to a wide pressure range.
- the inlet throttle bore is tangential aligned with the control room. This ensures that all areas the flow in the control room are set in rotation.
- Control room does not obstruct the rotation of the flow by edges or corners.
- the inlet throttle bore and the outlet throttle bore are vertical aligned with each other.
- the axis of rotation of the generated Flow parallel to the inflow direction of the fuel into the outlet throttle bore.
- Fig. 1 is a sectional view through a switching valve 40 with a connection to a control chamber 20 shown, in which a piston 50 arranged movable is.
- the piston 50 is fixed to the valve needle of the actual injection valve connected.
- the fuel flows from one central high-pressure supply 1 to the control room 20.
- an opening 22 which is to a Outflow throttle bore 30 leads. This results in a preferred rectangular Alignment of the axes of the inlet throttle bore 10 and the outlet throttle bore 30 to each other.
- the switching valve 40 On the side remote from the control chamber 20 side of the outlet throttle bore 30 is arranged the switching valve 40, which - depending on the switching position - the output of Drain throttle bore 30 opens or closes. From the switching valve 40 flows Fuel back to the low pressure area of the fuel system.
- control piston 50 On the front side 21 opposite side of the control chamber 20 is located the control piston 50, which is connected to the nozzle needle of the actual injection valve connected is. Movements of the control piston 50 correspond to movements of the Valve needle of the actual injector, which the combustion chamber from the high pressure area 1 of the fuel injection system separates. Movements of this control piston 50 (indicated by the double arrow in Fig. 1) lead to an opening or closing the fuel supply in the combustion chamber.
- the switching valve 40 is electrically controlled.
- the inlet throttle bore 10 is eccentric with respect to arranged on the control room 20.
- the control chamber 20 preferably has one cylindrical shape, i. the cross section shown in Fig. 2 along the dot-dash line Line A-A of Fig. 1 is circular.
- the orientation corresponds the longitudinal axis of the inlet throttle bore 10 of a tangent to the circle, which is formed by the cross section of the control chamber 20.
- Vortex flow 60 includes in the preferred tangential arrangement of the inlet bore 10, the entire cross-sectional area of the control chamber 20th
- the movement speed of the piston 50 directly depends on the outflowing volume flow, resulting from the Increasing the cavitation tendency of the flow in the outlet throttle bore 30 an increase in the accuracy of the movement speed of the piston 50. Since the moving speed of the piston 50 is the moving speed corresponds to the valve needle of the injector, thus increasing the Accuracy of the movement of the injector and thus the accuracy of injected fuel quantity. That means the movement speed the valve needle of the injection valve, which should be as uniform as possible, on the dimensioning or shape of the outlet throttle bore 30 targeted can be adjusted or optimized with respect to the injection conditions.
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)
Abstract
Description
- Fig. 1:
- eine Schnittansicht eines Schaltventils in Verbindung mit einer Zulaufdrosselbohrung, einem Steuerrraum und einer Ablaufdrosselbohrung; und
- Fig. 2:
- eine Schnittansicht entlang der Linie A-A in Fig. 1, die schematisch die Rotation der Strömung im Steuerrraum zeigt.
Claims (5)
- Kraftstoffeinspritzventil mit einer Zulaufdrosselbohrung (10), einer Ablaufdrosselbohrung (30), einem Steuerraum (20) und einem Schaltventil (40) für eine Hochdruckeinspritzung von Kraftstoff aus einem zentralen Hochdruckspeicher (1) in Brennräume einer Verbrennungskraftmaschine, wobei der Hochdruckspeicher (1) über die Zulaufdrosselbohrung (10) mit dem Steuerraum (20) in Wirkverbindung steht, welcher das Öffnen und Verschließen der Einspritzdüse steuert, wobei der Steuerraum (20) über die Ablaufdrosselbohrung (30) mit dem Schaltventil (40) kommuniziert, dadurch gekennzeichnet, dass die Zulaufdrosselbohrung (10) gegenüber dem Steuerraum (20) exzentrisch ausgerichtet ist.
- Kraftstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß die Zulaufdrosselbohrung (10) gegenüber dem Steuerraum (20) tangential ausgerichtet ist.
- Kraftstoffeinspritzventil nach Anspruch 2, dadurch gekennzeichnet, daß die Zulaufdrosselbohrung (10) und die Ablaufdrosselbohrung (30) senkrecht zueinander angeordnet sind.
- Kraftstoffeinspritzventil nach Anspruch 3, dadurch gekennzeichnet, daß der Steuerraum (20) eine zylindrische Gestalt aufweist.
- Kraftstoffeinspritzventil nach Anspruch 4, dadurch gekennzeichnet, daß die Ablaufdrosselbohrung (30) so dimensioniert ist, daß beim Betätigen des Schaltventiles (40) Kavitationseffekte in der Ablaufdrosselbohrung (30) auftreten.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19859592 | 1998-12-22 | ||
DE19859592A DE19859592C1 (de) | 1998-12-22 | 1998-12-22 | Kraftstoffeinspritzventil |
PCT/DE1999/003914 WO2000037794A1 (de) | 1998-12-22 | 1999-12-08 | Kraftstoffeinspritzventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1056946A1 EP1056946A1 (de) | 2000-12-06 |
EP1056946B1 true EP1056946B1 (de) | 2004-03-17 |
Family
ID=7892335
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99966843A Expired - Lifetime EP1056946B1 (de) | 1998-12-22 | 1999-12-08 | Kraftstoffeinspritzventil |
Country Status (5)
Country | Link |
---|---|
US (1) | US6382185B1 (de) |
EP (1) | EP1056946B1 (de) |
JP (1) | JP2002533608A (de) |
DE (2) | DE19859592C1 (de) |
WO (1) | WO2000037794A1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10055267B4 (de) * | 2000-11-08 | 2004-07-29 | Robert Bosch Gmbh | Druckgesteuerter Injektor für Hocheinspritzung mit Schieberdrosseln |
DE10101797A1 (de) * | 2001-01-17 | 2002-07-18 | Bosch Gmbh Robert | Einspritzventil |
DE10131640A1 (de) * | 2001-06-29 | 2003-01-16 | Bosch Gmbh Robert | Kraftstoffinjektor mit Einspritzverlaufsformung durch schaltbare Drosselelemente |
DE10146743A1 (de) * | 2001-09-22 | 2003-04-17 | Bosch Gmbh Robert | Einspritzventil für eine Brennkraftmaschine |
US7178975B2 (en) * | 2004-04-23 | 2007-02-20 | Five Star Technologies, Inc. | Device and method for creating vortex cavitation in fluids |
DE102006032779A1 (de) * | 2006-07-14 | 2008-01-17 | Siemens Ag | Injektor mit einem Steuerventil zur Steuerung einer Einspritznadel |
DE102008042293A1 (de) | 2008-09-23 | 2010-03-25 | Robert Bosch Gmbh | Injektor zur Einspritzung von mit Hochdruck beaufschlagtem Kraftstoff in den Brennraum einer Brennkraftmaschine |
JP5051279B2 (ja) * | 2009-12-21 | 2012-10-17 | 株式会社デンソー | 定残圧弁 |
WO2013119197A1 (en) * | 2012-02-06 | 2013-08-15 | International Engine Intellectual Property Company, Llc | Control valve |
DE102014215749A1 (de) * | 2014-08-08 | 2016-02-11 | Continental Automotive Gmbh | Drosseleinrichtung zum Steuern einer einer Kraftstoff-Einspritzdüse zuzuführenden Kraftstoffmenge sowie Einspritzeinrichtung |
WO2016075089A1 (en) * | 2014-11-11 | 2016-05-19 | Robert Bosch Gmbh | An injection valve having control chamber |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
DE3844430A1 (de) * | 1988-12-31 | 1990-07-05 | Bosch Gmbh Robert | Kraftstoffeinspritzpumpe fuer brennkraftmaschinen |
IT1257958B (it) * | 1992-12-29 | 1996-02-19 | Mario Ricco | Dispositivo di registrazione di una valvola di dosaggio a comando elettromagnetico, per un iniettore di combustibile |
US5467757A (en) * | 1993-08-20 | 1995-11-21 | Toyota Jidosha Kabushiki Kaisha | Compression-ignition type engine and combustion method of same |
IT1261149B (it) * | 1993-12-30 | 1996-05-09 | Elasis Sistema Ricerca Fiat | Valvola di dosaggio per il comando dell'otturatore di un iniettore di combustibile |
GB9520243D0 (en) * | 1995-10-04 | 1995-12-06 | Lucas Ind Plc | Injector |
JP3687758B2 (ja) * | 1995-11-14 | 2005-08-24 | 株式会社デンソー | 燃料噴射装置 |
FI101739B1 (fi) * | 1996-08-16 | 1998-08-14 | Waertsila Nsd Oy Ab | Ruiskutusventtiilijärjestely |
JP3653882B2 (ja) * | 1996-08-31 | 2005-06-02 | いすゞ自動車株式会社 | エンジンの燃料噴射装置 |
DE69719461T2 (de) * | 1996-11-21 | 2004-01-15 | Denso Corp | Speicherkraftstoffeinspritzvorrichtung für Verbrennungsmotor |
-
1998
- 1998-12-22 DE DE19859592A patent/DE19859592C1/de not_active Expired - Fee Related
-
1999
- 1999-12-08 US US09/622,677 patent/US6382185B1/en not_active Expired - Fee Related
- 1999-12-08 WO PCT/DE1999/003914 patent/WO2000037794A1/de active IP Right Grant
- 1999-12-08 JP JP2000589827A patent/JP2002533608A/ja active Pending
- 1999-12-08 DE DE59908888T patent/DE59908888D1/de not_active Expired - Lifetime
- 1999-12-08 EP EP99966843A patent/EP1056946B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE19859592C1 (de) | 2000-05-04 |
WO2000037794A1 (de) | 2000-06-29 |
EP1056946A1 (de) | 2000-12-06 |
US6382185B1 (en) | 2002-05-07 |
DE59908888D1 (de) | 2004-04-22 |
JP2002533608A (ja) | 2002-10-08 |
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