EP1177374B1 - Kraftstoffeinspritzventil - Google Patents
Kraftstoffeinspritzventil Download PDFInfo
- Publication number
- EP1177374B1 EP1177374B1 EP01913577A EP01913577A EP1177374B1 EP 1177374 B1 EP1177374 B1 EP 1177374B1 EP 01913577 A EP01913577 A EP 01913577A EP 01913577 A EP01913577 A EP 01913577A EP 1177374 B1 EP1177374 B1 EP 1177374B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle needle
- control pressure
- control
- injection valve
- 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
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
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/161—Means for adjusting injection-valve lift
-
- 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
- F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
-
- 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
- F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
- F02M45/12—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship providing a continuous cyclic delivery with variable 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
-
- 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
- F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
- F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic means
Definitions
- the invention relates to a fuel injection valve with a valve body, a formed therein control pressure chamber, which on one side of an actuating part is closed for a nozzle needle.
- controlled by the operating part is displaceable between a closed position and an open position, a Inlet to the control pressure chamber and with a drain from the control pressure chamber, which is controlled by a control valve.
- Such a control valve is known for example from DE 197 27 896 A1 and serves to cause the opening of a nozzle needle of the injection valve, to inject fuel into a cylinder of an internal combustion engine.
- the nozzle needle is permanently subjected to an opening pressure, which is the Seeks to lift nozzle needle from the associated valve seat.
- This opening force counteracts a closing force in the control pressure chamber on the actuating part is exercised.
- the closing force generated there is higher than that on the nozzle needle acting opening force, so that the actuating member in the closed position and consequently the nozzle needle remains closed. If, however, the Pressure in the control pressure chamber and consequently also the closing force generated there sinks, manages the opening force, the operating part in the open position shift, whereby the nozzle needle can lift off the valve seat. It can now Fuel to be injected.
- the pressure in the control pressure space is controlled by the control valve by the Process closed or opened. If by closing the process the the control pressure chamber supplied medium, usually fuel dammed is, is generated in the control pressure chamber, a high pressure. the nozzle needle in a closed state holds. If, on the other hand, the control valve is the drain opens, the pressure in the control pressure chamber decreases, so that the nozzle needle open can.
- the object of the invention is a fuel injection valve of the above gozuentwickeln type mentioned in that the injection quantity at a Partial opening stroke of the nozzle needle can be controlled more precisely.
- the control valve according to the invention with the features of the characterizing Part of claim 1 has the advantage that at the end of sectionö Stamms the nozzle needle results in a significant increase in resistance, the one counteracts further opening of the nozzle needle. Therefore, a striking results Threshold between a lower opening force. the only for a sectionö Stamm the nozzle needle leads, and a higher opening force, which leads to a complete opening stroke of the nozzle needle leads, resulting in a precise partially open Condition of the nozzle needle allows.
- the Throttling piston is arranged in the drain from the control pressure chamber and with a Throttle bore is provided, wherein the transition of the throttle piston of the is defined in the second position characterized in that the throttle piston at a Stop comes into contact.
- the throttle piston during the sectionö Stammshubes of the effluent from the control pressure chamber Fluid adjusted.
- the throttle piston does not touch the stop, is the outflow of fluid from the control pressure chamber only a comparatively low resistance opposite; only after the throttle piston abuts against the stop. is the fluid. that leaves the control pressure chamber, forced to flow through the throttle bore. This will be another Opening stroke of the nozzle needle a higher resistance opposite.
- the size the Generalö Stammshubes the nozzle needle can in this embodiment with little effort by appropriate selection of the cross section of the throttle piston and the possible stroke are set to the stop.
- the Throttling piston is arranged between the actuating part and the nozzle needle and provided with a groove which cooperates with a control edge, wherein the transition of the throttle piston from the first to the second position thereby is defined that the control edge comes into overlap with the groove.
- the throttle piston forms a slide, which by closing the groove closes a drain from a room into which the nozzle needle protrudes and from which it must displace fluid in a further opening. The Size of Sectionö Stammshubes can thus be determined directly by the with closed nozzle needle present distance between the end of the Groove and the control edge.
- the fuel injection valve has a valve body 10, in which a nozzle needle 12 is slidably mounted.
- the nozzle needle 12 controls the injection of fuel into a cylinder of a (not shown) Internal combustion engine.
- the supplied fuel exerts on the nozzle needle 12th an opening force, which the nozzle needle and an actuating part 14, on the nozzle needle 12 is supported, to adjust to a control pressure chamber 16 out examined.
- the control pressure chamber 16 is also supplied fuel, due to the in Control pressure chamber 16 prevailing pressure a closing force on the actuating part 14 exercises.
- the fuel is provided via an inlet 18, and from Control pressure chamber 16 is a flow 20 from which to a control chamber 22 of a Control valve 24 leads.
- the sequence 20 is again the Feed, and there is a drain 26 is provided, through which the fuel from the Control pressure chamber 16 and the control chamber 22 can flow.
- the control valve 24 has in the control chamber 22, a valve needle 28 which with a valve seat 30 cooperates.
- the control valve 24 is closed, so that via the inlet 18 of the Control pressure chamber 16 supplied fuel is dammed in this.
- the on this High pressure generated in this way exerts a closing force on the actuating part 14, which is larger than the force acting on the nozzle needle 12 opening force.
- the actuating part 14 is thus in the closed position, and the fuel injection valve is closed.
- the valve needle 28 from the valve seat 30th is lifted, the fuel from the control pressure chamber 16 via the control chamber Drain 22 and the drain 26, so that the pressure in the control pressure chamber decreases.
- the then reduced closing force allows the operating part, itself to adjust from the closed position to the open position, so that the nozzle needle opens. Now fuel is injected.
- a fuel injection valve according to a first embodiment of the invention described.
- the fuel injection valve according to the first embodiment is in the course of the control pressure chamber 16th a throttle piston 32 is arranged, which is provided with a throttle bore 34.
- the throttle piston is moved by a spring 36 into the starting position shown in the figure acted upon in the direction of the actuating part 14.
- the throttle piston 32 is in the drain 20 against the action of the spring 36 by a distance s displaceable; after a shift by the stroke s of the throttle piston arrives 32 to a stop 38 in Appendix.
- the injection valve described operates in the following manner: When the (in Figure 3, not shown) valve needle is lifted from the valve seat 30. can the fluid provided via the inlet 18 flow out of the control pressure chamber 16.
- the throttle piston 32 From its first shown in Figure 3 Position against the action of the spring 36 taken. because of the flow can initially be neglected by the throttle bore 34. That from the Control pressure chamber 16 effluent fluid allows the actuating member 14, itself with respect to Figure 3 to move upwards, so that the nozzle needle opens.
- the outflow of the fluid from the control pressure chamber 16 acts as long as a comparatively low resistance counter until the throttle piston 32, the stroke s has traveled so that it rests against the stop 38 and in his second Position is. If now continue fluid from the control pressure chamber 16 should flow, so that the operating member 14 can be opened further, this is only possible if the effluent from the control pressure space fluid under overcoming the corresponding flow resistance, the throttle bore 34th flows through. This is only within the desired short opening time possible if a correspondingly large opening force acts on the nozzle needle.
- An advantageous side effect of the described design is that the vibration behavior of the operating part and thus influences the wear behavior Can be improved by operating part and nozzle needle.
- Throttle bore a gap between the outer wall of the throttle piston 32nd and to use the inner wall of the drain 20 having the corresponding flow resistance provides for the effluent from the control pressure chamber 16 fluid.
- the throttle piston 32 is slidable in a guide sleeve 44 arranged in the valve body 10 between the actuating part 14 and the nozzle needle 12 is pressed.
- the throttle piston 32 is located with his with reference to Figure 4 lower end directly to the nozzle needle 12 at. while 4 is supported at its upper end with respect to FIG 4, the actuating member.
- At the throttle piston 32 also supports a nozzle spring 42 from which the. nozzle needle 12 acted upon in its closed position. As the actuating part not directly supported on the nozzle needle, no lateral forces from the actuating part be transferred to the nozzle needle.
- the throttle piston 32 is provided with a groove 44 which is ground as a ground Surface is formed on the outer wall of the throttle piston 32.
- the groove 44 cooperates with a control edge 46, by the nozzle needle 12th facing edge of the guide sleeve 40 is formed.
- a leakage collecting space 48 is arranged, into which the throttle piston protrudes.
- the injector described works in the following way: When the in Control pressure chamber on the actuating part 14 exerted closing force decreases, the opening force acting on the nozzle needle 12 lifts it from its nozzle seat so that they up with respect to Figure 4 against the effect the nozzle spring 42 adjusted. In this case, in the leakage collecting space 48th existing fluid, as long as the lower end of the groove 44 below the control edge is located, escape through the groove 44. Once the throttle piston 32 to the stroke s is shifted, the control edge 46 closes the groove 44, so that in the leakage collecting space 48 existing fluid only through the game between the Throttle piston 32 and the guide sleeve 40 can escape.
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 eine schematische Ansicht eines Kraftstoffeinspritzventils gemäß dem Stand der Technik;
- Figur 2 in einer vergrößerten Ansicht einen Teil des Kraffstoffeinspritzventils von Figur 1;
- Figur 3 in einer Ansicht entsprechend derjenigen von Figur 2 einen Ausschnitt eines Kraftstoffeinspritzventils gemäß einer ersten Ausführungsform der Erfindung; und
- Figur 4 in einer vergrößerten Ansicht entsprechend dem Ausschnitt IV von Figur 1 einen Ausschnitt eines Kraftstoffeinspritzventils gemäß einer zweiten Ausführungsform der Erfindung.
Claims (5)
- Kraftstoffeinspritzventil mit einem Ventilkörper (10), einem darin ausgebildeten Steuerdruckraum (16), der an einer Seite von einem Betätigungsteil (14) für eine Düsennadel (12) verschlossen ist, die von dem Betätigungsteil gesteuert zwischen einer Schließstellung und einer Öffnungsstellung verschiebbar ist, einem Zulauf (18) zum Steuerdruckraum und mit einem Ablauf (20) aus dem Steuerdruckraum, der von einem Steuerventil (24) gesteuert wird, dadurch gekennzeichnet, daß ein verschiebbarer Drosselkolben (32) vorgesehen ist, der in einer ersten Stellung einen Teilöffnungshub der Düsennadel aus der Schließstellung entgegen einem geringen Widerstand ermöglicht und in einer zweiten Stellung einen sich an den Teilöffnungshub anschließenden restlichen Öffnungshub der Düsennadel (12) in die Öffnungsstellung nur entgegen einem höheren Widerstand ermöglicht.
- Einspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß der Drosselkolben im Ablauf (20) vom Steuerdruckraum (16) angeordnet ist und mit einer Drosselbohrung (34) versehen ist, wobei der Übergang des Drosselkolbens von der ersten in die zweite Stellung dadurch definiert ist, daß der Drosselkolben an einem Anschlag (38) in Anlage gelangt.
- Einspritzventil nach Anspruch 2, dadurch gekennzeichnet, daß eine Feder (36) vorgesehen ist, die den Drosselkolben zum Betätigungsteil hin beaufschlagt.
- Einspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß der Drosselkolben (32) zwischen dem Betätigungsteil (14) und der Düsennadel (12) angeordnet ist und mit einer Nut (44) versehen ist, die mit einer Steuerkante (46) zusammenwirkt, wobei der Übergang des Drosselkolbens von der ersten in die zweite Stellung dadurch definiert ist, daß die Steuerkante (46) mit der Nut (44) in Überlappung gelangt.
- Einspritzventil nach Anspruch 4, dadurch gekennzeichnet, daß die Nut (44) durch eine ebene Fläche gebildet ist, die in die Wandung des Drosselkolbens (32) eingeschliffen ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10006111 | 2000-02-11 | ||
DE10006111A DE10006111A1 (de) | 2000-02-11 | 2000-02-11 | Kraftstoffeinspritzventil |
PCT/DE2001/000449 WO2001059289A2 (de) | 2000-02-11 | 2001-02-06 | Kraftstoffeinspritzventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1177374A1 EP1177374A1 (de) | 2002-02-06 |
EP1177374B1 true EP1177374B1 (de) | 2005-04-27 |
Family
ID=7630600
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01913577A Expired - Lifetime EP1177374B1 (de) | 2000-02-11 | 2001-02-06 | Kraftstoffeinspritzventil |
Country Status (7)
Country | Link |
---|---|
US (1) | US20020134852A1 (de) |
EP (1) | EP1177374B1 (de) |
JP (1) | JP2003522881A (de) |
BR (1) | BR0104462A (de) |
CZ (1) | CZ20013656A3 (de) |
DE (2) | DE10006111A1 (de) |
WO (1) | WO2001059289A2 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10132450B4 (de) * | 2001-07-04 | 2010-02-11 | Robert Bosch Gmbh | Kraftstoffeinspritzventil für Brennkraftmaschinen |
DE10160264A1 (de) * | 2001-12-07 | 2003-06-18 | Bosch Gmbh Robert | Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine |
DE102006008648A1 (de) * | 2006-02-24 | 2007-08-30 | Robert Bosch Gmbh | Kraftstoffeinspritzvorrichtung für eine Brennkraftmaschine |
DE102007035739A1 (de) | 2007-07-30 | 2009-02-05 | Robert Bosch Gmbh | Kraftstoffeinspritzventileinrichtung |
DE102009007095A1 (de) * | 2009-02-02 | 2010-08-05 | Continental Automotive Gmbh | Einspritzventil |
DE102011051861A1 (de) | 2011-07-15 | 2012-12-27 | L'orange Gmbh | Kraftstoff-Einspritzinjektor |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3952711A (en) * | 1975-03-04 | 1976-04-27 | Ambac Industries, Inc. | Diesel injection nozzle with independent opening and closing control |
DE3220398A1 (de) * | 1982-01-26 | 1983-07-28 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoff-einspritzduese fuer brennkraftmaschinen |
DE3221442A1 (de) * | 1982-06-07 | 1983-12-08 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoff-einssritzduese fuer brennkraftmaschinen |
DE3318887A1 (de) * | 1983-05-25 | 1984-11-29 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoff-einspritzduese fuer brennkraftmaschinen |
DE3405161A1 (de) * | 1984-02-14 | 1985-08-22 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoff-einspritzduese fuer brennkraftmaschinen |
US4986472A (en) * | 1989-09-05 | 1991-01-22 | Cummins Engine Company, Inc. | High pressure unit fuel injector with timing chamber pressure control |
US5779149A (en) * | 1996-07-02 | 1998-07-14 | Siemens Automotive Corporation | Piezoelectric controlled common rail injector with hydraulic amplification of piezoelectric stroke |
DE19727896A1 (de) * | 1997-07-01 | 1999-01-07 | Bosch Gmbh Robert | Kraftstoffeinspritzventil |
-
2000
- 2000-02-11 DE DE10006111A patent/DE10006111A1/de not_active Ceased
-
2001
- 2001-02-06 DE DE50106008T patent/DE50106008D1/de not_active Expired - Fee Related
- 2001-02-06 BR BR0104462-1A patent/BR0104462A/pt not_active Application Discontinuation
- 2001-02-06 US US09/958,695 patent/US20020134852A1/en not_active Abandoned
- 2001-02-06 JP JP2001558601A patent/JP2003522881A/ja active Pending
- 2001-02-06 WO PCT/DE2001/000449 patent/WO2001059289A2/de active IP Right Grant
- 2001-02-06 CZ CZ20013656A patent/CZ20013656A3/cs unknown
- 2001-02-06 EP EP01913577A patent/EP1177374B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
WO2001059289A2 (de) | 2001-08-16 |
CZ20013656A3 (cs) | 2003-02-12 |
JP2003522881A (ja) | 2003-07-29 |
EP1177374A1 (de) | 2002-02-06 |
WO2001059289A3 (de) | 2001-12-06 |
DE50106008D1 (de) | 2005-06-02 |
DE10006111A1 (de) | 2001-08-30 |
US20020134852A1 (en) | 2002-09-26 |
BR0104462A (pt) | 2002-01-08 |
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