EP2496820A1 - Einspritzventil - Google Patents
EinspritzventilInfo
- Publication number
- EP2496820A1 EP2496820A1 EP10773090A EP10773090A EP2496820A1 EP 2496820 A1 EP2496820 A1 EP 2496820A1 EP 10773090 A EP10773090 A EP 10773090A EP 10773090 A EP10773090 A EP 10773090A EP 2496820 A1 EP2496820 A1 EP 2496820A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ring
- injector body
- recess
- injection valve
- ring element
- 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
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
-
- 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
- F02M2200/03—Fuel-injection apparatus having means for reducing or avoiding stress, e.g. the stress caused by mechanical force, by fluid pressure or by temperature variations
-
- 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
- F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
-
- 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
- F02M2200/28—Details of throttles in fuel-injection apparatus
-
- 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
- F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
- F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations
Definitions
- Einsprit zventil The invention relates to an injection valve.
- An object of the invention is to provide an injection valve which is simple and inexpensive to produce and whose mechanical load is limited.
- the invention is characterized by an injection valve, which has an in ektorbaugrup ⁇ pe with an in ektor redesign, which has a extending in the direction of a longitudinal axis recess of the injector body hydraulically ⁇ lisch coupled with a high pressure circuit of a fluid, and in the recess of the injector axially movably arranged nozzle needle, which ⁇ is formed to prevent in a closed position fluid flow through at least one injection port and otherwise release the fluid flow, a arranged in the recess of the In ektor emotionss actuator unit having a tubular housing in which an actuator is arranged to ⁇ , and the tubular housing at one of the Einsprit zö réelle facing axial end has an end face which mechanically with a in the injector body trained stage is coupled, and an axially disposed between the end face and the step ring element.
- the ring element At least two opposing, radially extending passage openings are arranged.
- the passage openings are designed for hydraulic coupling between a ring interior disposed within the ring element and an outside of the ring element angeordne ⁇ th ring outer space.
- Such a trained injection valve has the advantage that a pressure equalization between the ring interior and the ring outer space is possible.
- the pressure curves in the ring interior and the ring outer space can thus be matched to each other.
- the dynamics of the pressure curve in the ring interior and the ring outer space can be kept small.
- the mechanical stress due to pressure fluctuations in the injection valve and the load of components of the injection valve can be kept small.
- At least one of the passage openings is formed as a slot or groove in the ring element.
- Such passage openings have the advantage that a simple production of the passage openings is possible.
- the ring member with the through openings high mechanical stability aufwei ⁇ sen can.
- the ring element has a plurality of passage openings, which are arranged point-symmetrically with respect to the longitudinal axis. This has the advantage that a pressure balance zwi ⁇ tween the ring interior and the ring outer space is very possible borrowed.
- the pressure curves in the ring interior and the ring outer space can be adjusted to each other very well regardless of the azimuth.
- the dynamics of the pressure curve can be kept small, in particular in the ring outer space, so that the load of components of the injection valve can be small.
- the ring element is designed as a hexagon with six sides. In each of the sides of the hexagon, one of the through holes is formed.
- a pressure equalization between the ring interior and the ring outer space is very possible.
- the pressure curves in the ring interior and the ring outer space can be adjusted very well.
- the invention is distinguished by an injection valve having an in ektorbaugrup ⁇ pe with an injector body having a located in the direction of a longitudinal axis extending recess of the injector body which is hydrau ⁇ cally coupled to a high-pressure circuit of a fluid , and an axially movable in the recess of the injector body arranged nozzle needle, which is formed ⁇ , to a fluid flow in a closed position
- arranged in the recess of the In ektor emotionss actuator unit having a tubular housing in which an actuator is arranged to ⁇ , and the tubular housing at one of the Einsprit zö réelle facing axial End has an end face which is mechanically coupled to a formed in the ektor redesign in the step, and an axially disposed between the end face and the step ring element. At least one radially extending through-hole is arranged in the step.
- the passage recess having a located in the direction of a longitudinal axis extending rece
- Such a trained injection valve has the advantage that a pressure equalization between the ring interior and the ring outer space is possible.
- the pressure curves in the ring interior and the ring outer space can be matched to each other.
- the dynamics of the pressure curve in the ring interior and the ring outer space can be kept small.
- the mechanical stress due to pressure fluctuations in the injection valve and the load on components of the injection valve can be kept small.
- the ring element can be formed without through openings and have ei ⁇ ne high mechanical stability.
- a plurality of naturalgangsauslangun- gene is arranged in the stage, which are arranged point-symmetrically with respect to the longitudinal axis. This has the advantage that a pressure equalization between the ring interior and the ring outer space is very possible. The pressure gradients in the ring The inner space and the outer ring area can be adjusted to each other very well, irrespective of the azimuth.
- At least one of the naturalgangsausEnglishun- gene as a groove, as a groove, as an annular groove or as a hole in the Stu ⁇ Fe formed.
- the ring element is formed from a wire ring with a gap.
- the gap is formed as a passage opening.
- FIG. 2 is a detail view of the injection valve in one
- Figure 3 is a detail view of a ring member of the injection ⁇ valve in a first embodiment
- Figure 4 is a detail view of the ring member of the Einspritzven ⁇ TILs in another embodiment
- FIG. 1 shows an injection valve 10.
- the injection valve 10 has an actuator assembly 14 with an actuator body 12 and an actuator unit 16 arranged in the injector body 12.
- the actuator unit 16 is designed as a piezo actuator with a stack of piezo elements. The axial extent of the actuator unit 16 changes depending on the applied electrical voltage. The electrical voltage is applied to the actuator unit 16 via a connection socket.
- the injector body 12 has a central longitudinal axis L and a recess 17.
- the injector body 12 may be made in one piece or in several pieces.
- a nozzle needle 18 is arranged in the recess 17 of the injector body 12.
- the Dü ⁇ nozzle needle 18 can be made in one or more parts.
- the actuator unit 16 is coupled to a transformer 20, which is likewise arranged in the injector body 12.
- the actuator 16 and the transformer 20 form a Stell ⁇ drive for the nozzle needle 18th
- the injector body 12 further comprises a high-pressure connection, via which the injection valve 10 is connected in the assembled state to a high-pressure circuit (not shown) of a fluid.
- valve 30 In the recess 17 of the injector body 12 a coupled to the transformer 20 valve 30 is arranged.
- the injection valve 10 further comprises a nozzle body 32, which is coupled by means of a nozzle retaining nut 36 with the injector body 12. At which the actuator unit 16 facing away End is or are arranged in the nozzle body 32, one or more injection openings 34.
- the nozzle needle 18 has an end face 38 facing the valve 30. At its end facing the actuator unit 16, the nozzle needle 18 has a nozzle needle absature 40, which is in contact with fluid which has approximately the pressure of the high-pressure circuit.
- the Düsennadelabsat z 40 is formed so that the force caused by the pressure of the fluid opening acts on the nozzle needle 18.
- a cavity 46 is further formed, which receives a nozzle spring 48, which is supported on the one hand on a shoulder of the cavity 46 and on the other hand, the nozzle needle 18 biased so that it assumes a closed position in which it passes through the fluid flow the at least one injection opening 34 prevents.
- the position of the nozzle needle 18 depends on the balance of the forces caused by the pressure of the fluid on the nozzle needle absate 40 and on the tip of the nozzle needle 18, and on the other hand, the spring force of the nozzle spring 48 and by the pressure of the fluid caused force, which is introduced via the end face 38 of the nozzle needle 18 in the closing direction of the nozzle needle 18.
- the actuator unit 16 By activating the actuator unit 16 designed as a piezoactuator, the actuator unit 16 expands, so that the valve 30 opens and fluid can flow out of the space above the end face 38 of the nozzle needle 18.
- the Düsenna ⁇ del 18 may thus in the direction of the actuator 16 move, whereby the at least one injection port 34 is released. If the injection valve 10 gene successes as fuel ⁇ einsprit zventil formed, then an injection of fuel into a combustion chamber of an internal combustion engine.
- the actuator 16 is deactivated, whereby the nozzle needle is moved away from the actuator unit 16 in axia ⁇ ler direction 18th
- the nozzle needle 18 is in a closed position
- the actuator unit 16 is shown with a tubular actuator housing 60.
- the stack of piezo elements of the piezoelectric actuator is arranged in the actuator housing 60.
- the actuator housing 60 is cylindrical and extends in the direction of the longitudinal axis L.
- the actuator housing 60 has a tube jacket 62 and a bottom plate 64.
- the bottom plate 64 is disposed at an axial end 65 of the tube shell 62 and thus of the actuator housing 60.
- the bottom plate 64 is coupled via a diaphragm 66 fle ⁇ xible with the tube jacket 62nd
- the bottom plate 64 is formed of a metal or has a metal.
- the actuator housing 60 has at the axial end facing ⁇ to 65 an end face 68 which mechanically sammenwirkt the injection port 34 with a recess formed in the In ektor Congress 12 to-70 level.
- a ring element 72 is arranged axially between the end face 68 and the step 70.
- the ring member 72 is shaped as a hexagon.
- the ring member 72 serves as ⁇ , a resulting in the axial direction Leerhub the actuator unit 16 with respect to the transformer 20, as he during the activation of the actuator unit 16 occurs to set to a predetermined value.
- a ring interior 74 is arranged within the ring member 72.
- a ring outer space 76 is arranged outside the ring member 72.
- the ring outer space 76 is sealed from the environment by means of an O-ring seal 77.
- the passage openings 78 have a typical width B_l of 0.5 mm.
- B_l the width of 0.5 mm.
- in each of the six sides 80 of the ring member 72 is disposed one of the fürgangsöff ⁇ voltages 78th
- the number of through holes 78 is generally at least two and may otherwise be arbitrarily large.
- the ring element 72 has a plurality of passage openings 78, which are arranged point-symmetrically with respect to the longitudinal axis L.
- the through holes 78 are formed as slots or grooves. By means of the through holes 78 may be of the disposed within the ring member 72.
- Ring ⁇ inner space 74 hydraulically coupled to the arranged outside the ring member 72.
- Ring exterior 76th At least two of the through holes 78 are opposite to each other, whereby a secure pressure equalization between the ring interior 74 and the ring outer space 76 via the through holes 78 is possible.
- the pressure profiles in the ring interior 74 and the ring outer space 76 can thus be adapted very easily to one another.
- the ring member 72 is formed of a wire ring.
- the ring member 72 is formed of a steel wire.
- the wire ring is shaped so that its ends have a gap 82 with a width B_2 in the ring element 72 form.
- the gap 82 is formed as one of the through holes 78 between the ring interior 74 and the ring outer space 76.
- the width B_2 is typically a maximum of 0.4 mm.
- At least one radially ers ⁇ executing forming through hole 84 is arranged.
- the passage recess 84 extends in the radial direction beyond the radial width of the ring element 72.
- each of the passage recesses 84 is assigned to one of the sides 80 of the hexagonal ring element 72.
- the passage recesses 84 are in particular bezüg ⁇ Lich the center axis L are arranged point symmetrical to each other.
- the passage recesses 84 are formed in particular as a groove, as grooves, as a ring groove or as blind holes in the injector body 12.
- the hydraulic pressure is intra ⁇ half and outside of the ring element 72 and thus also at the O-ring seal 77 is equal.
- the pressure profile in the ring interior 74 and the ring outer space 76 can be different.
- the time courses of the pressures in the ring interior 74 and the ring outer space 76 can be well matched to each other.
- the invention is not limited to the specified personssbei ⁇ games.
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
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009051677.8A DE102009051677B4 (de) | 2009-11-03 | 2009-11-03 | Einspritzventil |
| PCT/EP2010/066739 WO2011054869A1 (de) | 2009-11-03 | 2010-11-03 | Einspritzventil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2496820A1 true EP2496820A1 (de) | 2012-09-12 |
| EP2496820B1 EP2496820B1 (de) | 2015-04-01 |
Family
ID=43500286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10773090.5A Active EP2496820B1 (de) | 2009-11-03 | 2010-11-03 | Einspritzventil |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US8998104B2 (de) |
| EP (1) | EP2496820B1 (de) |
| DE (1) | DE102009051677B4 (de) |
| WO (1) | WO2011054869A1 (de) |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2190167A5 (de) * | 1972-06-23 | 1974-01-25 | Sopromi Soc Proc Modern Inject | |
| DE2542240C3 (de) * | 1975-09-23 | 1981-07-30 | Lechler Gmbh & Co Kg, 7012 Fellbach | Hohlkegeldüse zum Zerstäuben von Flüssigkeit |
| US6237570B1 (en) * | 1997-10-09 | 2001-05-29 | Denso Corporation | Accumulator fuel injection apparatus |
| DE10100422A1 (de) * | 2001-01-08 | 2002-07-11 | Bosch Gmbh Robert | Magnetventil zur Steuerung eines Einspritzventils einer Brennkraftmaschine |
| US6557776B2 (en) * | 2001-07-19 | 2003-05-06 | Cummins Inc. | Fuel injector with injection rate control |
| US20060138374A1 (en) * | 2004-04-14 | 2006-06-29 | Lucas Michael A | Solenoid actuated flow control valve including adjustable spacer |
| DE102005015409B4 (de) * | 2005-04-04 | 2019-01-03 | Continental Automotive Gmbh | Verfahren und Vorrichtung zur Vorgabe eines Abstands zwischen einem vorgegebenen ersten Bezugspunkt auf einem ersten Körper und einem vorgegebenen zweiten Bezugspunkt auf einem zweiten Körper und Körpervorrichtung |
| DE102005059437A1 (de) | 2005-12-13 | 2007-06-14 | Robert Bosch Gmbh | Kraftstoffinjektor |
| DE102006014246A1 (de) * | 2006-03-28 | 2007-10-04 | Robert Bosch Gmbh | Direktgesteuerter Kraftstoffinjektor |
| ATE456742T1 (de) * | 2006-04-11 | 2010-02-15 | Fiat Ricerche | Kraftstoffinjektor für verbrennungsmotoren mit einstellbarem dosierservoventil |
| JP4506737B2 (ja) * | 2006-09-08 | 2010-07-21 | トヨタ自動車株式会社 | 摩擦係合装置の支持構造および変速機 |
| DE102007010497A1 (de) * | 2007-03-05 | 2008-09-11 | Robert Bosch Gmbh | Injektor zum Einspritzen von Kraftstoff in Brennräume von Brennkraftmaschinen |
| DE102007038430A1 (de) * | 2007-08-14 | 2009-02-19 | Robert Bosch Gmbh | Kraftstoffeinspritzventileinrichtung |
-
2009
- 2009-11-03 DE DE102009051677.8A patent/DE102009051677B4/de not_active Expired - Fee Related
-
2010
- 2010-11-03 EP EP10773090.5A patent/EP2496820B1/de active Active
- 2010-11-03 WO PCT/EP2010/066739 patent/WO2011054869A1/de not_active Ceased
- 2010-11-03 US US13/505,662 patent/US8998104B2/en active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2011054869A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011054869A1 (de) | 2011-05-12 |
| EP2496820B1 (de) | 2015-04-01 |
| US8998104B2 (en) | 2015-04-07 |
| DE102009051677A1 (de) | 2011-08-25 |
| DE102009051677B4 (de) | 2020-03-26 |
| US20130126636A1 (en) | 2013-05-23 |
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