EP0188702A1 - Elektromagnetisch betätigbares Kraftstoffeinspritzventil - Google Patents
Elektromagnetisch betätigbares Kraftstoffeinspritzventil Download PDFInfo
- Publication number
- EP0188702A1 EP0188702A1 EP85115127A EP85115127A EP0188702A1 EP 0188702 A1 EP0188702 A1 EP 0188702A1 EP 85115127 A EP85115127 A EP 85115127A EP 85115127 A EP85115127 A EP 85115127A EP 0188702 A1 EP0188702 A1 EP 0188702A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- plug
- outlet opening
- spacer ring
- valve housing
- 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.)
- Granted
Links
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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
- 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
- F02M61/06—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 being furnished at seated ends with pintle or plug shaped extensions
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- 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
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
- F02M51/0639—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature acting as a valve
-
- 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
- F02M51/08—Injectors peculiar thereto with means directly operating the valve needle specially for low-pressure fuel-injection
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- 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
Definitions
- the invention relates to an electromagnetically actuated fuel injection valve for injection systems of internal combustion engines, with a valve housing, a pin arranged as a metering element in a valve bore of the valve housing, a soft iron core arranged within the valve housing and carrying a fixed magnetic winding, and an opposing axis and forming an air gap Anchor, which is firmly connected to a closing member controlling the flow.
- a valve housing with a pin arranged as a metering element in a valve bore of the valve housing, a soft iron core arranged within the valve housing and carrying a fixed magnetic winding, and an opposing axis and forming an air gap Anchor, which is firmly connected to a closing member controlling the flow.
- the injection quantity must be dimensioned very precisely in internal combustion engines. This makes it necessary to test each fuel injector after assembly for its flow rate and, if necessary, to increase the flow rate by regrinding either the hardened pin or the valve bore. This work is time consuming and therefore costly.
- the invention has for its object to provide a fuel injector according to the preamble with high flow accuracy, which is simple and inexpensive to manufacture.
- the pin is held by an axially adjustable holding body which is arranged in the valve bore and is independent of the closing member and projects with a conical region into an outlet opening.
- This inventive design of the fuel injection valve eliminates the reworking at the metering point that was previously necessary.
- the correct flow rate is achieved only by axially displacing the holding body and thus also the pin in the outlet opening.
- An advantageous embodiment of the invention consists in that the position of the holding body is determined by a spacer ring which bears against an outlet-side stop and which has the outlet opening.
- the flow rate can be changed simply by using spacer rings of different thicknesses.
- the invention permits numerous embodiments. One of them is shown schematically in the drawing and is described below.
- the drawing shows in longitudinal section a portion of a valve housing 1 with a valve bore 2, in which a holding body 3 is pressed.
- the holding body 3 forms a unit with a pin 4, which is an atomizing and metering element for the fuel injector.
- the end wall 5 forms a front stop 7 for the spacer ring 6.
- the valve bore 2 ends on the side facing away from the pin 4 with a valve seat 8, against which a plate valve 9 is held by means of a compression spring 10.
- This plate valve 9 is able to move against the force of the compression spring 10 against an armature 11 as soon as a solenoid coil, not shown, surrounding the armature is energized.
- the fuel to be sprayed then flows through the opened valve seat 8, then through a passage 12 in the holding body 3 and then between the pin 4 and the spacer ring 6 through an outlet opening 14 to the outside.
- the pin 4 has a conical outer surface 15 in the area of the outlet opening 14. If it tapers towards the holding body 3, for example, the free cross section of the outlet opening 14 increases when a thinner spacer ring 6 is selected and the pin 4 thus protrudes further from the outlet opening 14.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
- Die Erfindung bezieht sich auf ein elektromagnetisch betätigbares Kraftstoffeinspritzventil für Einspritzanlagen von Brennkraftmaschinen, mit einem Ventilgehäuse, einem in einer Ventilbohrung des Ventilgehäuses angeordneten Zapfen als Zumeßelement, einem innerhalb des Ventilgehäuses angeordneten, eine feststehende Magnetwicklung tragenden Weicheisenkern und einem diesem gleichachsig und unter Bildung eines Luftspaltes gegenüberstehenden Anker, welcher fest mit einem den Durchfluß steuernden Schließglied verbunden ist. Solche Einspritzventile sind in heutigen Einspritzmotoren gebräuchlich und daher allgemein bekannt.
- Die Einspritzmenge muß bei Brennkraftmaschinen sehr genau bemessen sein. Das macht es erforderlich, jedes Kraftstoffeinspritzventil nach der Montage hinsichtlich seiner Durchflußmenge zu testen und erforderlichenfalls die Durchflußmenge zu erhöhen, indem entweder der gehärtete Zapfen oder die Ventilbohrung nachgeschliffen werden. Diese Arbeiten sind zeitaufwendig und deshalb kostenintensiv.
- Der Erfindung liegt die Aufgabe zugrunde, ein Kraftstoffeinspritzventil nach dem Oberbegriff mit hoher Durchflußgenauigkeit zu schaffen, welches auf einfache und kostengünstige Weise herstellbar ist.
- Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Zapfen von einem in der Ventilbohrung angeordneten, vom Schließglied unabhängigen, axial verstellbaren Haltekörper gehalten ist und mit einem konischen Bereich in eine Austrittsöffnung ragt.
- Durch diese erfindungsgemäße Gestaltung des Kraftstoffeinspritzventils entfällt das bisher notwendige Nacharbeiten an der Zumeßstelle. Die richtige Durchflußmenge wird ausschließlich durch axiales Verschieben des Haltekörpers und damit auch des Zapfens in der Austrittsöffnung erreicht.
- Eine vorteilhafte Ausgestaltung der Erfindung besteht darin, daß die Lage des Haltekörpers durch einen gegen einen austrittsseitigen Anschlag anliegenden Distanzring festgelegt ist, welcher die Austrittsöffnung aufweist. Bei dieser Ausführungsform kann die Durchflußmenge einfach durch Verwendung unterschiedlich dicker Distanzringe verändert werden.
- Die Erfindung läßt zahlreiche Ausführungsformen zu. Eine davon ist schematisch in der Zeichnung dargestellt und wird nachfolgend beschrieben.
- Die Zeichnung zeigt im Längsschnitt einen Teilbereich eines Ventilgehäuses 1 mit einer Ventilbohrung 2, in der ein Haltekörper 3 eingepreßt ist. Der Haltekörper 3 bildet eine Einheit mit einem Zapfen 4, der ein Zerstäubungs- und Zumeßelement für das Kraftstoffeinspritzventil darstellt. Zwischen dem Haltekörper 3 und einer vorderen Abschlußwand 5, die demontierbar ist, befindet sich ein Distanzring 6. Die Abschlußwand 5 bildet einen vorderen Anschlag 7 für den Distanzring 6.
- Die Ventilbohrung 2 endet an der dem Zapfen 4 abgewandten Seite mit einem Ventilsitz 8, gegen den ein Plattenventil 9 mittels einer Druckfeder 10 gehalten ist. Dieses Plattenventil 9 vermag sich gegen die Kraft der Druckfeder 10 bis gegen einen Anker 11 zu verschieben, sobald eine nicht dargestellte, den Anker umgebende Magnetspule bestromt wird. Der zu verspritzende Kraftstoff strömt dann durch den geöffneten Ventilsitz 8, anschließend durch einen Durchlaß 12 im Haltekörper 3 und danach zwischen dem Zapfen 4 und dem Distanzring 6 durch eine Austrittsöffnung 14 nach außen.
- Wichtig für die vorliegende Erfindung ist, daß der Zapfen 4 im Bereich der Austrittsöffnung 14 eine konische Mantelfläche 15 hat. Verjüngt sich diese beispielsweise zum Haltekörper 3 hin, so vergrößert sich der freie Querschnitt der Austrittsöffnung 14, wenn man einen dünneren Distanzring 6 wählt und der Zapfen 4 dadurch weiter aus der Austrittsöffnung 14 ragt.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT85115127T ATE47618T1 (de) | 1985-01-23 | 1985-11-28 | Elektromagnetisch betaetigbares kraftstoffeinspritzventil. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3502087 | 1985-01-23 | ||
DE19853502087 DE3502087A1 (de) | 1985-01-23 | 1985-01-23 | Elektromagnetisch betaetigbares kraftstoffeinspritzventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0188702A1 true EP0188702A1 (de) | 1986-07-30 |
EP0188702B1 EP0188702B1 (de) | 1989-10-25 |
Family
ID=6260507
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85115127A Expired EP0188702B1 (de) | 1985-01-23 | 1985-11-28 | Elektromagnetisch betätigbares Kraftstoffeinspritzventil |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0188702B1 (de) |
AT (1) | ATE47618T1 (de) |
DE (2) | DE3502087A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0223018A2 (de) * | 1985-11-04 | 1987-05-27 | VDO Adolf Schindling AG | Elektromagnetisch betätigbares Kraftstoffeinspritzventil |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3811003A1 (de) * | 1988-03-31 | 1989-10-12 | Pierburg Gmbh | Elektromagnetisches einspritzventil fuer brennkraftmaschinen |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2756107A (en) * | 1952-05-16 | 1956-07-24 | Eugene J Korda | Fuel injection valve |
DE3023757A1 (de) * | 1980-06-25 | 1982-01-21 | Robert Bosch Gmbh, 7000 Stuttgart | Einspritzventil |
DE3308430A1 (de) * | 1982-03-15 | 1983-09-15 | Aisan Kogyo K.K., Obu, Aichi | Elektromagnetischer brennstoffinjektor |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE894789C (de) * | 1949-12-11 | 1953-10-29 | Daimler Benz Ag | Fluessigkeitsgesteuerte Einspritzduese mit konischem Zapfen fuer Brennkraftmaschinen |
JPS5862359A (ja) * | 1981-10-12 | 1983-04-13 | Nippon Denso Co Ltd | 電磁式燃料噴射弁 |
-
1985
- 1985-01-23 DE DE19853502087 patent/DE3502087A1/de not_active Withdrawn
- 1985-11-28 EP EP85115127A patent/EP0188702B1/de not_active Expired
- 1985-11-28 AT AT85115127T patent/ATE47618T1/de not_active IP Right Cessation
- 1985-11-28 DE DE8585115127T patent/DE3573944D1/de not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2756107A (en) * | 1952-05-16 | 1956-07-24 | Eugene J Korda | Fuel injection valve |
DE3023757A1 (de) * | 1980-06-25 | 1982-01-21 | Robert Bosch Gmbh, 7000 Stuttgart | Einspritzventil |
DE3308430A1 (de) * | 1982-03-15 | 1983-09-15 | Aisan Kogyo K.K., Obu, Aichi | Elektromagnetischer brennstoffinjektor |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0223018A2 (de) * | 1985-11-04 | 1987-05-27 | VDO Adolf Schindling AG | Elektromagnetisch betätigbares Kraftstoffeinspritzventil |
EP0223018A3 (en) * | 1985-11-04 | 1987-11-11 | Vdo Adolf Schindling Ag | Electromagnetically actuated fuel injection valve |
Also Published As
Publication number | Publication date |
---|---|
DE3573944D1 (en) | 1989-11-30 |
ATE47618T1 (de) | 1989-11-15 |
DE3502087A1 (de) | 1986-07-24 |
EP0188702B1 (de) | 1989-10-25 |
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