DE10348922A1 - Injection valve of common rail fuel injection system for diesel engine has second nozzle needle guided in first nozzle needle in such way that opening of first nozzle needle effects opening of second nozzle needle - Google Patents
Injection valve of common rail fuel injection system for diesel engine has second nozzle needle guided in first nozzle needle in such way that opening of first nozzle needle effects opening of second nozzle needle Download PDFInfo
- Publication number
- DE10348922A1 DE10348922A1 DE2003148922 DE10348922A DE10348922A1 DE 10348922 A1 DE10348922 A1 DE 10348922A1 DE 2003148922 DE2003148922 DE 2003148922 DE 10348922 A DE10348922 A DE 10348922A DE 10348922 A1 DE10348922 A1 DE 10348922A1
- Authority
- DE
- Germany
- Prior art keywords
- nozzle needle
- opening
- valve
- injection
- 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.)
- Withdrawn
Links
- 238000002347 injection Methods 0.000 title claims abstract description 51
- 239000007924 injection Substances 0.000 title claims abstract description 51
- 239000000446 fuel Substances 0.000 title description 15
- 238000007789 sealing Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 description 22
- 238000010586 diagram Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010417 needlework Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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
- F02M63/001—Fuel-injection apparatus having injection valves held closed mechanically, e.g. by springs, and opened by a cyclically-operated mechanism for a time
-
- 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
- F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
- F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
- F02M45/08—Injectors peculiar thereto
- F02M45/086—Having more than one injection-valve controlling discharge orifices
-
- 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
- F02M47/027—Electrically actuated valves draining the chamber to release the 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
- F02M49/00—Fuel-injection apparatus in which injection pumps are driven or injectors are actuated, by the pressure in engine working cylinders, or by impact of engine working piston
- F02M49/02—Fuel-injection apparatus in which injection pumps are driven or injectors are actuated, by the pressure in engine working cylinders, or by impact of engine working piston using the cylinder pressure, e.g. compression end 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
-
- 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
- F02M2200/46—Valves, e.g. injectors, with concentric valve bodies
-
- 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
-
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/46—Valves
-
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/46—Valves
- F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
- F02M59/468—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means using piezoelectric 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
- 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
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
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
Die Erfindung geht von einem Einspritzventil gemäß der im Oberbegriff des Patentanspruches 1 näher definierten Art aus.The Invention is based on an injection valve according to the preamble of claim 1 closer defined type.
Ein
derartiges Einspritzventil ist aus der
Das
aus der
Die innere Düsennadel ist bei diesem bekannten Einspritzventil in der äußeren Düsennadel geführt und koaxial zu dieser angeordnet. Auf die innere Düsennadel wirkt ein Steuerkolben, dessen freie Stirnseite an einen weiteren Steuerraum grenzt. Dieser Steuerraum ist über eine außerhalb des Ventilkörpers angeordnete Druckquelle mit einem Fluiddruck beaufschlagt. Bei einer Druckentlastung des Steuerraums kann die innere Düsennadel bei geöffneter äußeren Düsennadel öffnen, so dass über mit der inneren Düsennadel zusammenwirkende, zweite Einspritzöffnungen ebenfalls Kraftstoff in den Brennraum der Brennkraftmaschine eingespritzt werden kann.The inner nozzle needle is performed in this known injection valve in the outer nozzle needle and arranged coaxially to this. On the inner nozzle needle acts a control piston, whose free end borders on another control room. This Control room is over an outside of the valve body arranged pressure source with a fluid pressure applied. At a Pressure relief of the control chamber can be the inner nozzle needle open with open outer nozzle needle, so that over with the inner nozzle needle cooperating, second injection ports also fuel can be injected into the combustion chamber of the internal combustion engine.
Nachteilig ist bei diesem bekannten Einspritzventil, dass insbesondere die Ansteuerung der inneren Düsennadel mit einem hohen technischen Aufwand verbunden ist.adversely is in this known injection valve that in particular the Control of the inner nozzle needle associated with a high technical effort.
Vorteile der ErfindungAdvantages of invention
Das erfindungsgemäße Einspritzventil mit den Merkmalen nach dem Oberbegriff des Patentanspruches 1, bei dem die zweite Düsennadel derart in der ersten Düsennadel geführt ist, dass ein Öffnen der ersten Düsennadel ein Öffnen der zweiten Düsennadel bewirkt, hat den Vorteil, dass das Öffnen der inneren Düsennadel allein durch das Öffnen der äußeren Düsennadel ausgelöst wird und somit keine weiteren externen Mittel zum Öffnen der inneren Düsennadel erforderlich sind.The injection valve according to the invention with the features according to the preamble of claim 1, at the second nozzle needle such in the first nozzle needle guided is that opening the first nozzle needle an opening the second nozzle needle has the advantage of opening the inner nozzle needle only by opening the outer nozzle needle triggered and thus no further external means for opening the inner nozzle needle required are.
Das Einspritzventil nach der Erfindung kann insbesondere Bestandteil eines Common-Rail-Einspritzsystems sein und zur Kraftstoffeinspritzung in einen Brennraum einer Dieselbrennkraftmaschine eines Kraftfahrzeuges dienen.The Injection valve according to the invention can in particular part a common-rail injection system and for fuel injection in a combustion chamber of a diesel internal combustion engine of a motor vehicle serve.
Eine konstruktiv besonders einfach herzustellende Ausführungsform des Einspritzventils gemäß der Erfindung besteht darin, dass die erste Düsennadel und die zweite Düsennadel über einen Mitnehmer zusammenwirken. In diesem Fall greift also die erste Düsennadel ab einem bestimmten Öffnungsgrad an der zweiten Düsennadel an, so dass diese ebenfalls in Öffnungsstellung verfahren wird. Insbesondere in diesem Fall kann die innere Düsennadel auch ohne Druckschulter ausgelegt sein.A structurally particularly easy to manufacture embodiment the injection valve according to the invention is that the first nozzle needle and the second nozzle needle via a Interacting with the driver. In this case, so the first nozzle needle engages from a certain opening degree at the second nozzle needle so that these also in the open position is moved. In particular, in this case, the inner nozzle needle be designed without pressure shoulder.
Zur Unterstützung des Öffnens der zweiten Düsennadel wirkt aus dem angrenzenden Brennraum der Brennkraftmaschine über die mit der zweiten Düsennadel zusammenwirkende, zweite Einspritzöffnung ein sogenannter Gasgegendruck auf eine der zweiten Einspritzöffnung zugewandte Stirnseite der zweiten Düsennadel. Der Gasgegendruck wird in dem Brennraum der Brennkraftmaschine erzeugt.to support of opening the second nozzle needle acts from the adjacent combustion chamber of the internal combustion engine via the with the second nozzle needle cooperating, second injection port a so-called gas back pressure on one of the second injection port facing end face of the second nozzle needle. The gas back pressure is generated in the combustion chamber of the internal combustion engine.
Eine spezielle Ausführungsform des Einspritzventils nach der Erfindung kann so ausgelegt sein, dass das Öffnen der zweiten Düsennadel allein durch den in dem Brennraum der Brennkraftmaschine erzeugten Gasgegendruck erfolgt.A special embodiment of the injection valve according to the invention can be designed that opening the second nozzle needle solely by the generated in the combustion chamber of the internal combustion engine Gas back pressure occurs.
Die zweite Düsennadel, die vorzugsweise in einer stirnseitigen, sacklochartigen Ausnehmung der ersten Düsennadel angeordnet ist, ist bei einer vorteilhaften Ausführung mittels einer Dichtfeder in Schließrichtung vorgespannt. Damit kann gewährleistet werden, dass die zweite Düsennadel in Schließstellung dichtend auf ihrem zugeordneten Sitz aufliegt und kein Kraftstoff zu der bzw. den zugeordneten Einspritzöffnungen gelangt.The second nozzle needle, preferably in a frontal, blind hole-like recess the first nozzle needle is arranged, is in an advantageous embodiment by means of a sealing spring in the closing direction biased. This can be guaranteed be that second nozzle needle in closed position sealingly resting on its associated seat and no fuel reaches the or the associated injection openings.
Um ein definiertes Schließen der zweiten Düsennadel zu gewährleisten, ist die Dichtfeder zweckmäßigerweise derart eingespannt, dass ein Schließen der ersten Düsennadel ein Schließen der zweiten Düsennadel bewirkt. Die Vorspannung der Dichtfeder wird also bei Schließen der ersten Düsennadel so angehoben, dass die zweite Düsennadel bei geschlossener erster Düsennadel oder auch während des Schließens der ersten Düsennadel gegen den Gasgegendruck schließt, der aus dem Brennraum der Brennkraftmaschine über die mindestens eine zweite Einspritzöffnung auf die zweite Düsennadel wirkt.In order to ensure a defined closing of the second nozzle needle, the sealing spring is suitably clamped such that a closing Shen the first nozzle needle causes a closing of the second nozzle needle. The bias of the sealing spring is thus raised upon closing of the first nozzle needle so that the second nozzle needle closes when the first nozzle needle or even during closing of the first nozzle needle against the gas back pressure from the combustion chamber of the internal combustion engine via the at least one second injection port to the second Nozzle needle works.
Weitere Vorteile und vorteilhafte Ausgestaltungen des Gegenstandes nach der Erfindung sind der Beschreibung, der Zeichnung und den Patentansprüchen entnehmbar.Further Advantages and advantageous embodiments of the subject to The invention are the description, the drawings and the claims removed.
Zeichnungdrawing
Ein Ausführungsbeispiel des Einspritzventils nach der Erfindung ist in der Zeichnung schematisch vereinfacht dargestellt und wird in der nachfolgenden Beschreibung näher erläutert. Es zeigenOne embodiment the injection valve according to the invention is schematically simplified in the drawing and will be explained in more detail in the following description. It demonstrate
Beschreibung des Ausführungsbeispielsdescription of the embodiment
In
Das
Düsenmodul
Die äußere Düsennadel
Zur
Steuerung ragt die äußere Düsennadel
Des
Weiteren ist die äußere Düsennadel
In
dem Bereich des Druckraums
Die
innere Düsennadel
Die
innere Düsennadel
Der
Ventilsteuerraum
In
dem Ventilraum
Zur
Betätigung
des Ventilschließglieds
Das
in
Wenn
das Ventilschließglied
Wenn
das Ventilschließglied
In
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003148922 DE10348922A1 (en) | 2003-10-18 | 2003-10-18 | Injection valve of common rail fuel injection system for diesel engine has second nozzle needle guided in first nozzle needle in such way that opening of first nozzle needle effects opening of second nozzle needle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003148922 DE10348922A1 (en) | 2003-10-18 | 2003-10-18 | Injection valve of common rail fuel injection system for diesel engine has second nozzle needle guided in first nozzle needle in such way that opening of first nozzle needle effects opening of second nozzle needle |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10348922A1 true DE10348922A1 (en) | 2005-05-19 |
Family
ID=34442153
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2003148922 Withdrawn DE10348922A1 (en) | 2003-10-18 | 2003-10-18 | Injection valve of common rail fuel injection system for diesel engine has second nozzle needle guided in first nozzle needle in such way that opening of first nozzle needle effects opening of second nozzle needle |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE10348922A1 (en) |
-
2003
- 2003-10-18 DE DE2003148922 patent/DE10348922A1/en not_active Withdrawn
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8139 | Disposal/non-payment of the annual fee |