EP1045977B1 - Kraftstoffeinspritzventil für brennkraftmaschinen - Google Patents
Kraftstoffeinspritzventil für brennkraftmaschinen Download PDFInfo
- Publication number
- EP1045977B1 EP1045977B1 EP99938137A EP99938137A EP1045977B1 EP 1045977 B1 EP1045977 B1 EP 1045977B1 EP 99938137 A EP99938137 A EP 99938137A EP 99938137 A EP99938137 A EP 99938137A EP 1045977 B1 EP1045977 B1 EP 1045977B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- valve
- space
- fuel injection
- valve member
- 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
- 239000000446 fuel Substances 0.000 title claims description 32
- 238000002485 combustion reaction Methods 0.000 title claims description 23
- 238000002347 injection Methods 0.000 title claims description 15
- 239000007924 injection Substances 0.000 title claims description 15
- 238000007789 sealing Methods 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
-
- 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
- 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
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
Definitions
- the invention relates to a fuel injection valve for Internal combustion engines according to the preamble of the claim 1.
- Such an injector goes for example from the DE 43 25 904 C2 and from the unpublished DE 197 16 226.6-13.
- the fuel injector according to the invention with the Features of claim 1, however, has the Advantage that the leadership and sealing against the fuel injection valves known from the prior art is improved for internal combustion engines.
- the order the one pressure shoulder on the distant combustion chamber End of the valve body in a fluid with the pressure chamber connected compensation room, the front through completed an axially displaceable pressure sleeve has the particularly great advantage that the compensation space is always connected to the pressure chamber. hereby it is ensured that the pressure shoulder on the one hand is always pressurized, on the other ensures that pressure differences, for example when opening the fuel injector, between the Pressure chamber and the compensation room compensated directly become.
- the valve member is advantageously between the two Pressure shoulders needle-shaped and has one constant diameter.
- the pressure sleeve is preferred to avoid leaks pressed onto the valve member.
- the compensation space can be designed in any way his.
- One particularly with regard to a simple one Manufacturing advantageous embodiment sees that the compensation chamber the pressure shoulder remote from the combustion chamber surrounds in a ring.
- the high pressure fuel supply to the fuel injector preferably takes place from one for all fuel injection valves common high pressure storage space, which in turn can be filled using a high-pressure fuel pump is.
- the actuator for actuating the valve member is advantageous an electromechanical actuator. It is designed in particular as a piezo actuator or electromagnet.
- FIG. 1 An embodiment of a fuel injector for internal combustion engines, the lower, combustion chamber side Part in Fig. 1 in a schematic sectional view is shown has a valve body 10 which by means of a union nut 30 on a valve holding body 20 is axially clamped.
- the valve body 10 has an axial guide bore 40 in which a needle-shaped valve member 50 is axially displaceable which is led to his in one (not shown) combustion chamber of the fuel to be supplied Internal combustion engine protruding lower end has valve head 52 acting as a valve closing member.
- This valve head 52 protruding from the bore has one conical sealing surface 53 facing valve body 10 on by in the illustrated embodiment formed on the valve head 52 seat ring and that with a corresponding valve seat surface 11 on the end face of the valve body on the combustion chamber side 10 cooperates.
- valve member 50 Between the wall of the bore 40 and part of the Shaft of the valve member 50 is a pressure chamber 12 in the valve body 10 formed, the axially each of a Valve member 50 formed pressure shoulder 54 and 55 limited is.
- This pressure chamber 12 opens into a pressure chamber 13 enlarged volume of the pressure chamber 12 itself a supply bore 60 in a known manner.
- the one located at the end of the pressure chamber 12 remote from the combustion chamber Pressure shoulder 55 has the same pressure application area on how that formed on the valve member head 52 pressure shoulder 54 near the combustion chamber, so that the valve member 50 is pressure balanced. This prevents that the fuel injector due to the applied Common rail pressure opens automatically.
- the fuel injector has another additional one Attack surface acted upon by high-pressure fuel through which the pending at the injector High fuel pressure in the closing direction on the valve member 50 works.
- This additional pressure application area is by a lower end face 71 on the combustion chamber side a pressure sleeve 70 is formed, which a compensation space 80, the pressure shoulder 55 distant from the combustion chamber in the shape of a ring surrounds and fluidly connected to the pressure chamber 12 is on its side facing away from the combustion chamber.
- the compensation space 80 forms in this way the combustion chamber distant end of the pressure chamber 12.
- the sleeve 70 is axially displaceable in an annular body 90 led.
- valve member 56 As can also be seen from Fig. 1, follows the Valve member 56 another stem portion 57, the into a spring chamber provided in the valve holding body 20 22 protrudes.
- an electromechanical actuator for example a piezo actuator or an electromagnet, an axial displacement of the valve member 50 and thus an opening of those provided in the valve member head 52 Injection opening (not shown).
- the area between the two pressure shoulders 54 or 55 of the valve member 50 is needle-shaped with a constant Diameter formed.
- the elasticity that this enables of the valve member 50 in particular perpendicular to Valve member axis advantageously enables Compensate for an offset between the guides of the Valve member 50 through the pressure sleeve 70 and the Valve member head 52 are formed in the central region of the needle-shaped area.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
- Fig. 1
- schematisch geschnitten den unteren Bereich eines von der Erfindung Gebrauch machenden Kraftstoffeinspritzventils für Brennkraftmaschinen und
- Fig. 2
- schematisch geschnitten in vergrößerter Darstellung das brennraumferne Ende des Ventilkörpers des in Fig. 1 dargestellten Kraftstoffeinspritzventils für Brennkraftmaschinen.
Claims (6)
- Kraftstoffeinspritzventil für Brennkraftmaschinen mit einem in einer Bohrung (40) eines Ventilkörpers (10) axial verschiebbaren Ventilglied (50), das an seinem brennraumseitigen Ende einen, ein Ventilschließglied bildenden Ventilgliedkopf (52) aufweist, der auf seiner dem Ventilkörper (10) zugewandten Seite eine Dichtfläche (53) aufweist, mit der er mit einer an der brennraumseitigen Stirnseite des Ventilkörpers (10) vorgesehenen Ventilsitzfläche (11) zusammenwirkt, und mit Einspritzöffnungen im Ventilgliedkopf (52), die von einem zwischen dem Ventilglied (50) und der Wand der Bohrung (40) gebildeten Druckraum (12), abführend an der Umfangswand des Ventilgliedkopfs (52) austreten, wobei die Einspritzöffnungen bei am Ventilsitz (11) anliegendem Ventilglied (50) von der Wand der Bohrung (40) verschlossen sind und durch eine nach außen gerichtete Öffnungshubbewegung des Ventilglieds (50) aufgesteuert werden, wobei das Ventilglied von einem von außen steuerbaren Stellglied, unabhängig vom Kraftstoffhochdruck im Druckraum (12) betätigbar ist und wobei zwei den Druckraum axial begrenzende, einander zugewandte Druckschultern (54, 55) am nadelförmigen Ventilglied (50) vorgesehen sind, die im wesentlichen jeweils gleiche Druckangriffsflächen aufweisen, dadurch gekennzeichnet, daß eine der Druckschultern (55) an dem brennraumfernen Ende des Ventilkörpers (10) in einem mit dem Druckraum (12) fluidisch verbundenen Ausgleichsraum (80) angeordnet ist, der stirnseitig durch eine axial verschieblich geführte Druckhülse (70) abgeschlossen ist.
- Kraftstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß das Ventilglied (50) zwischen den beiden Druckschultern (54, 55) nadelförmig ausgebildet ist und einen konstanten Durchmesser aufweist.
- Kraftstoffeinspritzventil nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Druckhülse (70) auf das Ventilglied (50) aufgepreßt ist.
- Kraftstoffeinspritzventil nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Ausgleichsraum (80) die brennraumferne Druckschulter (55) ringförmig umgibt.
- Kraftstoffeinspritzventil nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Druckraum (12) mit einem Hochdruckspeicherraum verbindbar ist, der seinerseits über eine Kraftstoffhochdruckpumpe befüllbar ist.
- Kraftstoffeinspritzventil nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Stellglied als elektromechanisches Stellglied, vorzugsweise als Piezoaktor oder Elektromagnet ausgebildet ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19837813A DE19837813A1 (de) | 1998-08-20 | 1998-08-20 | Kraftstoffeinspritzventil für Brennkraftmaschinen |
DE19837813 | 1998-08-20 | ||
PCT/DE1999/001660 WO2000011341A1 (de) | 1998-08-20 | 1999-06-08 | Kraftstoffeinspritzventil für brennkraftmaschinen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1045977A1 EP1045977A1 (de) | 2000-10-25 |
EP1045977B1 true EP1045977B1 (de) | 2003-09-03 |
Family
ID=7878158
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99938137A Expired - Lifetime EP1045977B1 (de) | 1998-08-20 | 1999-06-08 | Kraftstoffeinspritzventil für brennkraftmaschinen |
Country Status (5)
Country | Link |
---|---|
US (1) | US6247453B1 (de) |
EP (1) | EP1045977B1 (de) |
JP (1) | JP2002523672A (de) |
DE (2) | DE19837813A1 (de) |
WO (1) | WO2000011341A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19953562A1 (de) * | 1999-11-08 | 2001-05-23 | Bosch Gmbh Robert | Kraftstoff-Einspritzdüse |
US6343587B1 (en) * | 2000-06-28 | 2002-02-05 | Siemens Automotive Corporation | Fuel injector armature permitting fluid and vapor flow |
DE10204655A1 (de) * | 2002-02-05 | 2003-08-28 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
EP1561942B1 (de) * | 2004-01-29 | 2006-12-27 | Siemens VDO Automotive S.p.A. | Flüssigkeitseinspritzventil und sein Herstellungverfahren |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3734737A1 (de) * | 1986-10-14 | 1988-04-21 | Orbital Eng Pty | Brennstoffeinspritzsystem und mit diesem ausgeruestete verbrennungsmaschine |
GB2219627B (en) * | 1988-06-10 | 1992-10-28 | Orbital Eng Pty | Improvements relating to nozzles for in-cylinder fuel injection systems |
US5024385A (en) * | 1990-01-11 | 1991-06-18 | Outboard Marine Corporation | Internal combustion engine fuel supply system |
DE4325904C2 (de) * | 1993-08-02 | 1995-07-20 | Daimler Benz Ag | Für eine Dieselbrennkraftmaschine vorgesehene Kraftstoffeinspritzanlage mit einer den Kraftstoff fördernden Hochdruckpumpe in eine gemeinsame Versorgungsleitung (Common-Rail) für alle Einspritzdüsen |
DE19504849A1 (de) * | 1995-02-15 | 1996-08-22 | Bosch Gmbh Robert | Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen |
US5752656A (en) * | 1996-07-10 | 1998-05-19 | Outboard Marine Corporation | Nozzle assembly and method of fabrication thereof |
DE19642440A1 (de) * | 1996-10-15 | 1998-04-16 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
DE19701288C2 (de) * | 1997-01-16 | 1999-10-14 | Daimler Benz Ag | Ventil zur dosierten Abgabe von Fluiden |
-
1998
- 1998-08-20 DE DE19837813A patent/DE19837813A1/de not_active Withdrawn
-
1999
- 1999-06-08 DE DE59906859T patent/DE59906859D1/de not_active Expired - Fee Related
- 1999-06-08 JP JP2000566568A patent/JP2002523672A/ja active Pending
- 1999-06-08 WO PCT/DE1999/001660 patent/WO2000011341A1/de active IP Right Grant
- 1999-06-08 EP EP99938137A patent/EP1045977B1/de not_active Expired - Lifetime
- 1999-06-08 US US09/529,324 patent/US6247453B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE59906859D1 (de) | 2003-10-09 |
DE19837813A1 (de) | 2000-02-24 |
WO2000011341A1 (de) | 2000-03-02 |
JP2002523672A (ja) | 2002-07-30 |
US6247453B1 (en) | 2001-06-19 |
EP1045977A1 (de) | 2000-10-25 |
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