DE3118485C2 - Fuel injector for internal combustion engines - Google Patents
Fuel injector for internal combustion enginesInfo
- Publication number
- DE3118485C2 DE3118485C2 DE19813118485 DE3118485A DE3118485C2 DE 3118485 C2 DE3118485 C2 DE 3118485C2 DE 19813118485 DE19813118485 DE 19813118485 DE 3118485 A DE3118485 A DE 3118485A DE 3118485 C2 DE3118485 C2 DE 3118485C2
- Authority
- DE
- Germany
- Prior art keywords
- injection
- throttle
- throttling
- nozzle
- pin part
- 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
Links
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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Die Erfindung betrifft eine Kraftstoffeinspritzdüse für Brennkraftmaschinen mit einer entgegen des Kraftstoffes öffnenden Düsennadel mit Drosselzapfen, dessen drosselnder Zapfen teil bei Schließstellung der Düsennadel gemeinsam mit dem Austrittskanal einen Drosselspalt bildet, dessen Spalthöhe höchstens dem Radius des Austrittskanals entspricht, wobei der drosselnde Zapfenteil aus dem Austrittskanal herausragt. Auf diese Weise wird ein für eine große Voreinspritzmenge erforderlicher langer Drosselhub erreicht.The invention relates to a fuel injection nozzle for internal combustion engines with a nozzle needle with a throttle pin opening against the fuel, the throttling pin part of which forms a throttle gap when the nozzle needle is in the closed position, the gap height of which corresponds at most to the radius of the outlet channel, the throttling pin part protruding from the outlet channel . In this way, a long throttle stroke required for a large pilot injection quantity is achieved.
Description
33
'$: spritzbrennkraftmaschinen mit Nebenkammereinsprit-'i;- zung ist jeweils ein Düsenkörper mit 2, eine in diesem fj ausgebildete Ventilsitzfläche mit 3, ein Kraftstoffzuführfi kanal mit 4. ein zylindrisch ausgebildetes Spritzloch mit 'p, 5 und eine entgegen der Strömungsrichtung des zügep' führten Kraftstoffes öffnende Düsennadel mit 6 be- |< zeichnet Der mit der Ventilsitzfläche 3 zusammenwirfc kende Nadelsitz der Ventilnadel 6 ist mit 12 bezeichnet •j * Die Kxaftstoffeinspritzdüse 1 ist als Drosselzapfendü- '$: Injection internal combustion engines with Nebenkammereinsprit-'i, - wetting is in each case a nozzle body 2, an opening formed in this fj valve seat 3, a Kraftstoffzuführ fi channel 4. a cylindrically shaped perforated spray with' p, 5, and a counter to the flow direction of the The fuel-opening nozzle needle is designated by 6. The needle seat of the valve needle 6 that interacts with the valve seat surface 3 is designated by 12.
■.■' se ausgebildet, deren Düsennadel 6 im Anschluß an den &}. Nadelsitzberwch mit einem Drosselzapfen 7 versehen |?' ist der aus einem drosselnden Zapfenteil 9 und einem H diesen mit dem Nadelsitebereich verbindenden radial rückspringenden, nicht drosselnden Zapfenteil 8 mit geringem Durchmesser besteht von denen der drosselnde Zapfenteil 9 aus dem Spritzloch S herausragt und gemeinsam mit dem Spritzloch einen Drosselspalt 10 bildet welcher bei Schließtage der Düsennadel 6 in der unteren Hälfte des Spritzlochs 5 liegt ■. ■ ' se formed, the nozzle needle 6 following the &}. Needle seat surface provided with a throttle pin 7 | ? 'is composed of a throttling pin part 9 and an H, which connects this with the needle side area, radially recessed, non-throttling pin part 8 with a small diameter, of which the throttling pin part 9 protrudes from the injection hole S and together with the injection hole forms a throttle gap 10 which on closing days the nozzle needle 6 lies in the lower half of the injection hole 5
Bei dem in F i g. 1 gezeigten Drosselzapten 7 weist der drosselnde Zapfenteil 9 zunächst einen dem nicht drosselnden Zapfenteil 8 mit geringerem Durchmesser zugewandten, zylindrisch geformten Abschnitt und einen in Spritzrichtung daran anschließenden und sich in dieser Richtung unter einem Winkel von z. B. 2° leicht konisch verjüngenden Zapfenabschnitt auf. Der die Spaltlänge des Drosselspaltes 10 bestimmende drosselnde Zapfenteil 9 Oberdeckt in Schließlage der Düsennadel 6 das Spritzloch 5 in axialer Richtung etwa bis zur Hälfte.In the case of the FIG. 1 has throttle pin 7 shown the throttling pin part 9 initially a non-throttling pin part 8 with a smaller diameter facing, cylindrically shaped section and an adjoining it in the spray direction and in this direction at an angle of z. B. 2 ° slightly conically tapered pin section. The who Gap length of the throttle gap 10 determining throttling pin part 9 covers in the closed position of the nozzle needle 6, the spray hole 5 in the axial direction approximately up to Half.
In F i g. 2 fehlt der zylindrische Abschnitt des drosselnden Zapfenteils 9. Der Zapfenteil 9 beginnt erst ab einer Stelle 11 im Spritzloch 5 und ist in Spritzrichtung sich insgesamt leicht konisch verjüngend ausgebildet Der Abschnitt des Spritzloches 5 von der Stelle 11 bis zur unteren Kante des Spritzlochs entspricht etwa einem Viertel der Spritzlochlänge. Auch bei dieser Ausführung ist ein langer Drosselhub für die erforderlich große Voreinspritzmenge sichergestellt.In Fig. 2, the cylindrical section of the throttling pin part 9 is missing. The pin part 9 is only beginning a point 11 in the spray hole 5 and is in the spray direction overall slightly conically tapered. The section of the spray hole 5 from the point 11 to to the lower edge of the spray hole corresponds to about a quarter of the spray hole length. A long throttle stroke is also required for this version large pre-injection quantity ensured.
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Claims (3)
Zur Lösung der Aufgabe dienen die im kennzeichnen-Throttle stroke of the nozzle needle results.
To solve the task, the identifying
Brennkraftmaschinen mit einer in einem Düsenkörper Durch die besondere Anordnung des drosselndenThe invention relates to a fuel injection nozzle for the features specified in the part of claim 1.
Internal combustion engines with a nozzle body due to the special arrangement of the throttling
Brennraum abgespritzt, denn bei Direkteinspritzern Vorteilhafte Weiterbildungen der Erfindung lassenMachines with direct injection are provided, there is a quantity in the combustion chamber, which causes a smooth combustion which is known due to the short throttle strokes of the 55. At the same time, there is an improved noise nozzle needle only small pre-injection quantities in the behavior of the internal combustion engine.
Combustion chamber sprayed, because with direct injectors, advantageous developments of the invention can be
das Rußverhalten und den Kraftstoffverbrauch auswir- Der Gegenstand der Erfindung wird nachfolgend an-larger pre-injection quantities would be disadvantageously derived from the subclaims,
the soot behavior and the fuel consumption.
ist folglich eine Beeinträchtigung des einwandfreien Be- F i g. 1 und 2 im Schnitt den unteren, einspritzseitigenken. Due to the short throttle strokes, there is also a risk of coking in the throttle gap, as illustrated in the drawing, and some examples are described in more detail. It show the
is consequently an impairment of proper operation. 1 and 2 in section the lower, injection-side
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19813118485 DE3118485C2 (en) | 1981-05-09 | 1981-05-09 | Fuel injector for internal combustion engines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19813118485 DE3118485C2 (en) | 1981-05-09 | 1981-05-09 | Fuel injector for internal combustion engines |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3118485A1 DE3118485A1 (en) | 1982-11-18 |
DE3118485C2 true DE3118485C2 (en) | 1986-12-04 |
Family
ID=6131915
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19813118485 Expired DE3118485C2 (en) | 1981-05-09 | 1981-05-09 | Fuel injector for internal combustion engines |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3118485C2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3725618A1 (en) * | 1987-08-03 | 1989-02-23 | Bosch Gmbh Robert | Fuel injection jet for vehicle engine - has double spring system holding spindle against needle tip to control throttling gap during idling |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3444452A1 (en) * | 1984-12-06 | 1986-06-12 | Vdo Adolf Schindling Ag, 6000 Frankfurt | ELECTROMAGNETICALLY ACTUABLE FUEL INJECTION VALVE |
JPH0354358A (en) * | 1989-07-21 | 1991-03-08 | Yamaha Motor Co Ltd | High pressure fuel injection device of engine |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2709917A1 (en) * | 1977-03-08 | 1978-09-14 | Bosch Gmbh Robert | FUEL INJECTOR |
DE2836095C2 (en) * | 1978-08-17 | 1986-04-03 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg | Fuel injection nozzle for air-compressing internal combustion engines |
DE2847058A1 (en) * | 1978-10-28 | 1980-05-08 | Maschf Augsburg Nuernberg Ag | FUEL INJECTION NOZZLE |
-
1981
- 1981-05-09 DE DE19813118485 patent/DE3118485C2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3725618A1 (en) * | 1987-08-03 | 1989-02-23 | Bosch Gmbh Robert | Fuel injection jet for vehicle engine - has double spring system holding spindle against needle tip to control throttling gap during idling |
DE3725618C2 (en) * | 1987-08-03 | 2002-11-07 | Bosch Gmbh Robert | Fuel injection nozzle for internal combustion engines |
Also Published As
Publication number | Publication date |
---|---|
DE3118485A1 (en) | 1982-11-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
D2 | Grant after examination | ||
8363 | Opposition against the patent | ||
8365 | Fully valid after opposition proceedings | ||
8330 | Complete disclaimer |