DE102010003405A1 - Fuel injector with hydraulic coupler unit - Google Patents
Fuel injector with hydraulic coupler unit Download PDFInfo
- Publication number
- DE102010003405A1 DE102010003405A1 DE201010003405 DE102010003405A DE102010003405A1 DE 102010003405 A1 DE102010003405 A1 DE 102010003405A1 DE 201010003405 DE201010003405 DE 201010003405 DE 102010003405 A DE102010003405 A DE 102010003405A DE 102010003405 A1 DE102010003405 A1 DE 102010003405A1
- Authority
- DE
- Germany
- Prior art keywords
- coupler
- piston
- shaped
- peripheral surface
- cup
- 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- Withdrawn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
- 239000000446 fuel Substances 0.000 title claims abstract description 18
- 230000002093 peripheral effect Effects 0.000 claims abstract description 25
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000002996 emotional effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
- 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
- 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
- F02M61/167—Means for compensating clearance or thermal expansion
-
- 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
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
-
- 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
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
Es wird ein Kraftstoffinjektor mit einer hydraulischen Kopplereinheit (50) vorgeschlagen, die einen Kopplerkolben (51) und einen Ventilkolben (53) aufweist, die jeweils an einem Kopplerkörper (52) axial verschiebbar geführt sind und zwischen sich ein Kopplerspaltvolumen (25) aufweisen. Der Kopplerkolben (51) ist topfförmig und der Kopplerkörper (52) hülsenförmig mit einer äußeren Umfangsfläche (56) und einer inneren Umfangsfläche (57) ausgeführt. Der topfförmige Kopplerkolben (51) ist an der äußeren Umfangsfläche (56) des Kopplerkörpers (52) und der Ventilkolben (53) an der inneren Umfangsfläche (57) des Kopplerkörpers (52) axial verschiebbar geführt.A fuel injector is proposed with a hydraulic coupler unit (50) which has a coupler piston (51) and a valve piston (53), each of which is axially displaceable on a coupler body (52) and has a coupler gap volume (25) between them. The coupler piston (51) is pot-shaped and the coupler body (52) is sleeve-shaped with an outer peripheral surface (56) and an inner peripheral surface (57). The cup-shaped coupler piston (51) is guided axially displaceably on the outer circumferential surface (56) of the coupler body (52) and the valve piston (53) on the inner circumferential surface (57) of the coupler body (52).
Description
Die Erfindung betrifft einen Kraftstoffinjektor mit einer hydraulischen Kopplereinheit nach dem Oberbegriff des Anspruchs 1.The invention relates to a fuel injector with a hydraulic coupler unit according to the preamble of claim 1.
Stand der TechnikState of the art
Aus
Offenbarung der ErfindungDisclosure of the invention
Der Kraftstoffinjektor mit den kennzeichnenden Merkmalen des Anspruchs 1 hat den Vorteil, dass die hydraulische Kopplereinheit bei grundsätzlich der gleichen Funktion mit einer erheblich geringeren Baulänge ausgeführt werden kann. Darüber hinaus kann aufgrund der Führung des Ventilkolbens an der inneren Umfangsfläche des Kopplerkörpers und aufgrund der Führung des Kopplerkolbens an der äußeren Umfangsfläche des Kopperkörpers bei Druckbeaufschlagung des Kopplerspaltes nur noch eine Aufweitung des Führungsspiels des Kopplerkolbens auftreten. Eine Aufweitung des Führungsspiels am Ventilkolben tritt nicht auf, weil der Kopplerkörper sowohl von innen als auch von außen mit dem Druck im Führungsspalt beaufschlagt ist. Durch die geringere Aufweitung des Führungsspaltes sinkt das Leckagevolumen, welches während des Arbeitstaktes über die Führungsspalte aus dem Kopplerspaltvolumen verdrängt wird.The fuel injector with the characterizing features of claim 1 has the advantage that the hydraulic coupler unit can be performed with basically the same function with a significantly smaller overall length. Moreover, due to the guidance of the valve piston on the inner circumferential surface of the coupler body and due to the guidance of the coupler piston on the outer peripheral surface of the Kopperkörpers upon pressurization of the coupler gap only a widening of the guide clearance of the coupler piston occur. An expansion of the guide clearance on the valve piston does not occur because the coupler body is acted upon both from the inside and from the outside with the pressure in the guide gap. Due to the smaller expansion of the guide gap, the leakage volume decreases, which is displaced from the coupler gap volume during the working cycle via the guide gaps.
Weiterbildungen der Erfindung sind durch die Maßnahmen der Unteransprüche möglich.Further developments of the invention are possible by the measures of the subclaims.
Eine besonders kompakte Ausführung der Kopplereinheit wird erreicht, indem der topfförmige Kopplerkolben eine zylindrische Umfangswand mit einer daran ausgebildeten inneren Umfangsfläche und der Ventilkolben eine zylindrische Kolbenfläche aufweist, wobei der topfförmige Kopplerkolben mit der inneren Umfangsfläche an der äußeren Umfangsfläche des Kopplerkörpers und der Ventilkolben mit der äußeren Kolbenfläche an der inneren Umfangsfläche des Kopplerkörpers axial verschiebbar geführt ist.A particularly compact embodiment of the coupler unit is achieved by the cup-shaped coupler piston has a cylindrical peripheral wall with an inner peripheral surface formed thereon and the valve piston has a cylindrical piston surface, wherein the cup-shaped coupler piston with the inner peripheral surface on the outer peripheral surface of the coupler body and the valve piston with the outer Piston surface is guided axially displaceably on the inner peripheral surface of the coupler body.
Durch den direkt an den Führungsdurchmesser des Kopplerkolbens angrenzenden massiven, deckelförmigen Abschluss mit der inneren. Stirnwand wird darüber hinaus zusätzlich die Aufweitung des Führungsspiels des Kopplerkolbens an der Kopplerspaltseite reduziert, wodurch sich die Leckageverluste im Kopplerspaltvolumen zusätzlich verringern.Due to the solid, cover-shaped end directly adjacent to the guide diameter of the coupler piston with the inner. Moreover, the end wall additionally reduces the widening of the guide play of the coupler piston at the coupler gap side, which additionally reduces the leakage losses in the coupler gap volume.
Zur Abstützung der Vorspannfeder weist der topfförmige Kopplerkolben einen radial nach außen weisenden Bund und der hülsenförmige Kopplerkörper einen weiteren radial nach außen weisenden Bund auf, an denen jeweils die Vorspannfeder unter Vorspannung angreift.To support the biasing spring, the cup-shaped coupler piston has a collar pointing radially outwards and the sleeve-shaped coupler body has a further collar pointing radially outwards, against which the pretensioning spring engages in each case under prestressing.
Ausführungsbeispielembodiment
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert.An embodiment of the invention is illustrated in the drawing and explained in more detail in the following description.
Es zeigen:Show it:
Der in
Die in den
Der Kopplerkörper
Die Kopplereinheit
Bei Betätigung des Aktorelements
Der topfförmige Kopplerkolben
Der das Kopplerspaltvolumen ausbildende Druckraum
Am topfförmigen Kopplerkolben
Zwischen dem kopplerkolbenseitigen Bund
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 10322672 A1 [0002] DE 10322672 A1 [0002]
Claims (6)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201010003405 DE102010003405A1 (en) | 2010-03-29 | 2010-03-29 | Fuel injector with hydraulic coupler unit |
| EP11155165A EP2375050A1 (en) | 2010-03-29 | 2011-02-21 | Fuel injector with hydraulic coupling unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201010003405 DE102010003405A1 (en) | 2010-03-29 | 2010-03-29 | Fuel injector with hydraulic coupler unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE102010003405A1 true DE102010003405A1 (en) | 2011-09-29 |
Family
ID=44020823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE201010003405 Withdrawn DE102010003405A1 (en) | 2010-03-29 | 2010-03-29 | Fuel injector with hydraulic coupler unit |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2375050A1 (en) |
| DE (1) | DE102010003405A1 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10322672A1 (en) | 2003-05-20 | 2004-12-09 | Robert Bosch Gmbh | Valve for controlling liquids |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10145620B4 (en) * | 2001-09-15 | 2006-03-02 | Robert Bosch Gmbh | Valve for controlling fluids |
| DE10302863B3 (en) * | 2003-01-25 | 2004-09-16 | Robert Bosch Gmbh | Hydraulic coupler for piezo-injectors in motor vehicle with improved filling, has piston side wall region deformable outwards near end facing inside of housing, and inside of region connected to hollow volume |
| DE102004044811A1 (en) * | 2004-09-16 | 2006-03-23 | Robert Bosch Gmbh | Control valve for fuel injector of internal combustion engine, has actuator area, which is permanently filled with electrically insulated fluid, and sealing unit sealably connected between tappet and valve body to separate fluid and fuel |
| DE102006031373B4 (en) * | 2006-07-06 | 2013-03-07 | Continental Automotive Gmbh | Injection system and method for manufacturing an injection system |
-
2010
- 2010-03-29 DE DE201010003405 patent/DE102010003405A1/en not_active Withdrawn
-
2011
- 2011-02-21 EP EP11155165A patent/EP2375050A1/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10322672A1 (en) | 2003-05-20 | 2004-12-09 | Robert Bosch Gmbh | Valve for controlling liquids |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2375050A1 (en) | 2011-10-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee | ||
| R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20141001 |