EP1313945B1 - Einspritzventil für die einspritzung von kraftstoff in eine verbrennungskraftmaschine sowie verfahren zur steuerung des öffnungs- und schliessvorgangs einer düsennadel eines einspritzventils - Google Patents
Einspritzventil für die einspritzung von kraftstoff in eine verbrennungskraftmaschine sowie verfahren zur steuerung des öffnungs- und schliessvorgangs einer düsennadel eines einspritzventils Download PDFInfo
- Publication number
- EP1313945B1 EP1313945B1 EP01971616A EP01971616A EP1313945B1 EP 1313945 B1 EP1313945 B1 EP 1313945B1 EP 01971616 A EP01971616 A EP 01971616A EP 01971616 A EP01971616 A EP 01971616A EP 1313945 B1 EP1313945 B1 EP 1313945B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- control
- control valve
- injection
- valve
- 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
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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
- 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
- F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel 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
- 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
- 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
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
- F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
Definitions
- the invention relates to a method for controlling the opening and closing operation of a nozzle needle of an injection valve according to the preamble of claim 1. Furthermore The invention relates to an injection valve for implementation this procedure.
- 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.
- injection systems use a high pressure pump to fuel the fuel in a common to all cylinders of the engine Pressure accumulator promoted from which the injectors the individual cylinders are supplied with fuel.
- the Opening and closing the injection valves is done in the Usually controlled electromagnetically.
- the injectors are in such systems equipped with control valves designed as servo valves, which hydraulically open and close the nozzle needle control the injection valve, that is, in particular the Schedule the start and end of the injection process.
- the servo valve mainly affects the speed with which opens and closes the injector.
- the fuel comes with System pressure from a high pressure accumulator, not shown via a high-pressure bore 1 to the injection valve housing 2.
- a control valve 3 is arranged in the injection valve housing 2, via which the injector housing 2 is supplied Fuel via a line 4 of a nozzle pressure chamber 5 is feedable.
- the present one acts in the nozzle pressure chamber 5 Pressure the front area of an axially movable in the injector housing 2 stored and guided nozzle body 6, which is used with one arranged at the foremost end Nozzle needle 7 injection holes 8 in the injector housing 2 to open and close the combustion chamber of an internal combustion engine to lead.
- the injection bores 8 are thus when the injection valve is open with the nozzle pressure chamber 5 in connection, the in turn via line 4, control valve 3 and High pressure bore 1 is connected to the high pressure accumulator.
- the control valve 3 serves as a switching element between the operating pressure (Rail pressure) in a valve chamber 9 of the control valve 3 and the nozzle pressure chamber 5.
- the control valve 3 sits by the action of Rail pressure and the biasing force of a spring 10 sealing on a valve seat 11.
- the control valve 3 switches via a Tappet 12, the one indicated by the arrow 13 Actuator is controlled.
- the actuation of the plunger 12 leads from the in the Illustrated closed position of the control valves 3 to the fact that the control valves 3 against the rail pressure opened in the valve chamber 9 and the biasing force of the spring 10 become.
- you open the control valves 3 plants the rail pressure into an annular chamber 14 and through line 4 up into the nozzle pressure chamber 5.
- the rail pressure in the nozzle pressure chamber 5 causes a shift of the nozzle body 6 against the biasing force one in a control room 15 arranged, loading the nozzle body 6 Spring 16 so that the nozzle needle 7 the injection holes 8 releases and the injection of fuel into the combustion chamber of the internal combustion engine.
- the control valve 3 a pressure compensation chamber 17.
- the pressure compensation chamber 17 is formed in that the control valves 3 one with areas of different diameters provided step piston 18.
- the control valve 3 is closed by deactivating the Actuator, which causes the control valve 3 under the biasing force the spring 10 closes.
- the displacement of the step piston 18 causes a pressure build-up in the chamber 19 and in Control room 15. Since simultaneously with the closing of the control valve 3 the rail pressure in the nozzle pressure chamber 5 collapses, closes the nozzle needle 7 under the effect of the Nozzle body 6 acting biasing force of the spring 10 and the Pressure in the control room 15.
- the pressure build-up in the chamber 19 and in the control room 15 is additionally regulated by a valve 20.
- This configuration thus ensures that the closing the nozzle needle 7 with the participation of the additional pressure in Control room 15 is done quickly and without delay while when the nozzle needle 7 is opened, the pressure in the control chamber 15 is reduced is, so that the opening only against the biasing force of the Spring 10 takes place.
- the short switching times and the fact that the pressure in chamber 19 and in control room 15 is not permanent contact ensures that permanent leakage does not occur and switching leaks are minimized as far as possible.
- the stepped piston 18 is formed in two parts in this exemplary embodiment. As soon as fuel with rail pressure flows into line 4, fuel with rail pressure simultaneously flows via a bore 21 to the second part of the stepped piston 18 and displaces it against the biasing force of an additional spring 22.
- the control valve 3 is closed by deactivating the Actuator, which causes the control valve 3 under the biasing force the spring 10 closes.
- the displacement of the step piston 18 causes a pressure build-up in the chamber 19 and in Control room 15, since the control valve closes at the same time 3 the rail pressure in the nozzle pressure chamber 5 and above the bore 21 on the stepped piston 18 collapses.
- the Nozzle needle 7 thus closes under the effect on the nozzle body 6 acting biasing force of the spring 10 and the Pressure in the control room 15.
- This configuration also ensures that the closing the nozzle needle 7 with the participation of the additional pressure in the control room 15 takes place quickly and without delay
- the pressure in the control room 15 is broken down so that the opening only against the biasing force the spring 10 takes place.
- the short switching times and the fact that the pressure in the chamber 19 and in the control room 15th not permanently present ensure that permanent leakage does not occur occur and switching leaks are minimized as far as possible.
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
- Figur 1
- einen Längsschnitt durch eine erste Ausführungsform eines erfindungsgemäßen Einspritzventils und
- Figur 2
- einen Längsschnitt durch eine zweite Ausführungsform eines erfindungsgemäßen Einspritzventils.
Claims (6)
- Einspritzventil für die Einspritzung von Kraftstoff in eine Verbrennungskraftmaschine mit einem Steuerventil (3) zur Steuerung der Kraftstoffeinspritzung und mit einem Steuerraum (15), in dem ein axial beweglicher und über eine Feder (10) vorgespannter Düsenkörper (6) angeordnet ist, der mit einer Düsennadel (7) in Wirkverbindung steht, die bei der Bewegung des Düsenkörpers (6) Einspritzbohrungen (8) freigibt oder verschließt, wobei über das Steuerventil (3) der Druck im Steuerraum (15) beeinflußbar ist,
wobei das Steuerventil (3) und der Steuerraum (15) so miteinander gekoppelt sind, daß das Schließen des Steuerventils (3) eine Druckerhöhung im Steuerraum (15) bewirkt und das Öffnen des Steuerventils (3) eine Druckabsenkung im Steuerraum (15) bewirkt,
dadurch gekennzeichnet, daß das Steuerventil (3) zur Absenkung des Drucks im Steuerraum (15) bei geöffnetem Steuerventil (3) zumindest einen Druckausgleichsraum (17) aufweist. - Einspritzventil nach Anspruch 1,
dadurch gekennzeichnet, daß das Steuerventil (3) zur Ausbildung des Druckausgleichraums (17) einen mit Bereichen unterschiedlichen Durchmessers versehenen Stufenkolben (18) aufweist. - Einspritzventil nach Anspruch 2,
dadurch gekennzeichnet, daß der Stufenkolben (18) des Steuerventils (3) mehrteilig aufgebaut ist. - Einspritzventil für die Einspritzung von Kraftstoff in eine Verbrennungskraftmaschine mit einem Steuerventil (3) zur Steuerung der Kraftstoffeinspritzung und mit einem Steuerraum (15), in dem ein axial beweglicher und über eine Feder (10) vorgespannte Düsenkörper (6) angeordnet ist, der mit einer Düsennadel (7) in Wirkverbindung steht, die bei der Bewegung des Düsenkörpers (6) Einspritzbohrungen (8) freigibt oder verschließt, wobei über das Steuerventil (3) der Druck im Steuerraum (15) beeinflussbar ist, wobei das Steuerventil (3) und der Steuerraum (15) so miteinander gekoppelt sind, dass das Schließen des Steuerventil (3) eine Druckerhöhung im Steuerraum (15) bewirkt und das Öffnen des Steuerventils (3) eine Druckabsenkung im Steuerraum (15) bewirkt,
dadurch gekennzeichnet, dass das Steuerventil (3) zur Absenkung des Drucks im Steuerraum (15) bei geöffnetem Steuerventil (3) über eine Bohrung (21) mit einem Stufenkolben (18) in Verbindung steht. - Einspritzventil nach Anspruch 4, dadurch gekennzeichnet, dass der Stufenkolben (18) zweiteilig aufgebaut ist.
- Einspritzventil nach Anspruch 5, dadurch gekennzeichnet, dass die Bohrung (21) mit dem zweiten Teil des Stufenkolbens (18) in Verbindung steht.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10042231 | 2000-08-28 | ||
DE10042231A DE10042231B4 (de) | 2000-08-28 | 2000-08-28 | Einspspritzventil für die Einspritzung von Kraftstoff in eine Verbrennungskraftmaschine sowie Verfahren zur Steuerung des Öffnungs-und Schließvorgangs einer Düsennadel eines Einspritzventils |
PCT/DE2001/003122 WO2002018779A1 (de) | 2000-08-28 | 2001-08-16 | Einspritzventil für die einspritzung von kraftstoff in eine verbrennungskraftmaschine sowie verfahren zur steuerung des öffnungs- und schliessvorgangs einer düsennadel eines einspritzventils |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1313945A1 EP1313945A1 (de) | 2003-05-28 |
EP1313945B1 true EP1313945B1 (de) | 2004-10-27 |
Family
ID=7654062
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01971616A Expired - Lifetime EP1313945B1 (de) | 2000-08-28 | 2001-08-16 | Einspritzventil für die einspritzung von kraftstoff in eine verbrennungskraftmaschine sowie verfahren zur steuerung des öffnungs- und schliessvorgangs einer düsennadel eines einspritzventils |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1313945B1 (de) |
DE (2) | DE10042231B4 (de) |
WO (1) | WO2002018779A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10326044A1 (de) * | 2003-06-10 | 2004-12-30 | Robert Bosch Gmbh | Einspritzdüse für Brennkraftmaschinen |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2558790A1 (de) * | 1975-12-24 | 1977-07-14 | Bosch Gmbh Robert | Kraftstoffeinspritzduese fuer brennkraftmaschinen |
US5299919A (en) * | 1991-11-01 | 1994-04-05 | Paul Marius A | Fuel injector system |
US5397055A (en) * | 1991-11-01 | 1995-03-14 | Paul; Marius A. | Fuel injector system |
AT1626U1 (de) * | 1995-04-05 | 1997-08-25 | Avl Verbrennungskraft Messtech | Speichereinspritzsystem für brennkraftmaschinen |
DE19519192C1 (de) * | 1995-05-24 | 1996-06-05 | Siemens Ag | Einspritzventil |
DE19519191C2 (de) * | 1995-05-24 | 1997-04-10 | Siemens Ag | Einspritzventil |
DE19734354A1 (de) * | 1997-08-08 | 1999-02-11 | Mtu Friedrichshafen Gmbh | Kraftstoffeinspritzsystem für eine Brennkraftmaschine |
DE19748999C2 (de) * | 1997-11-06 | 2002-11-07 | Daimler Chrysler Ag | Magnetventilgesteuerter Injektor für ein Speichersystem einer mehrzylindrigen Brennkraftmaschine |
GB9905896D0 (en) * | 1999-03-16 | 1999-05-05 | Lucas Ind Plc | Fuel injector arrangement |
DE10033426B4 (de) * | 2000-07-10 | 2004-10-14 | Robert Bosch Gmbh | Injektor/Düsennadel-Kombination mit steuerraumseitiger Kopplung |
-
2000
- 2000-08-28 DE DE10042231A patent/DE10042231B4/de not_active Expired - Fee Related
-
2001
- 2001-08-16 EP EP01971616A patent/EP1313945B1/de not_active Expired - Lifetime
- 2001-08-16 DE DE50104321T patent/DE50104321D1/de not_active Expired - Fee Related
- 2001-08-16 WO PCT/DE2001/003122 patent/WO2002018779A1/de active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
DE50104321D1 (de) | 2004-12-02 |
WO2002018779A1 (de) | 2002-03-07 |
DE10042231B4 (de) | 2004-09-30 |
EP1313945A1 (de) | 2003-05-28 |
DE10042231A1 (de) | 2002-03-14 |
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