EP1692393A1 - Injektor zur einspritzung von kraftstoff in brennr ume von b rennkraftmaschinen, insbesondere piezoaktorgesteuerter common-rail-injektor - Google Patents
Injektor zur einspritzung von kraftstoff in brennr ume von b rennkraftmaschinen, insbesondere piezoaktorgesteuerter common-rail-injektorInfo
- Publication number
- EP1692393A1 EP1692393A1 EP04786749A EP04786749A EP1692393A1 EP 1692393 A1 EP1692393 A1 EP 1692393A1 EP 04786749 A EP04786749 A EP 04786749A EP 04786749 A EP04786749 A EP 04786749A EP 1692393 A1 EP1692393 A1 EP 1692393A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- injector
- nozzle
- valve plate
- nozzle needle
- face
- 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
- 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
- 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
- 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
- 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
-
- 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
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0045—Three-way 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
- 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
- F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
- F02M2547/001—Control chambers formed by movable sleeves
Definitions
- the invention relates to an injector according to the preamble of patent claim 1.
- a CR injector of the aforementioned type has become known from DE 199 36 668 A1.
- a similar injector is also shown in DE ... (R.302723).
- a CR injector, in which the booster piston is actuated by a piezo actuator, is shown in DE 195 19 191 C2.
- injectors require a comparatively high design effort on the sealing surfaces, especially in the high pressure area.
- the object of the invention is to reduce the effort on the sealing surfaces.
- Drawing shows - in partial representation - an embodiment of a CR injector, in vertical longitudinal section.
- a sleeve-shaped translator housing 11 is arranged with a stepped central axial bore 12, in which a piezo actuator 13 and a translator piston 14 are axially displaceably received.
- a translator space 15 is formed between the piezo actuator 13 and the translator piston 14.
- the piezo actuator 13 (which is connected to an electrical power supply in the usual and therefore not shown) is pretensioned in the arrow direction 17 by a biasing spring 16 which surrounds the translator housing 11 and is designed as a tubular spring, that is to say counter to the direction of action of the piezo actuator 13.
- valve plate 18 In the axial extension of the translator housing 11, a valve plate, generally numbered 18, is formed, which receives a control valve 20 in a stepped axial bore 19.
- the valve plate 18 forms a one-piece component together with the booster housing 11, so that - on a plane designated by 21 - there is no need for a seal (with respect to the booster housing 11).
- the translator housing 11 and the valve plate 18 are received in a continuous, central axial bore 23 at 22 of a cylindrical holding body 24.
- the cylindrical holding body 24 is in turn fitted into the injector body 10.
- valve plate 18 has a release 26 on the underside.
- the resulting reduced sealing surface diameter is designated by d.
- a prestressing element 27 which surrounds the booster housing 11 and is designed as a tubular spring, is provided, which pressurizes the valve plate 18 at 28 and is supported on the rear side on the shoulder 22 of the axial bore 23 of the holding body 24.
- a high-pressure channel 29 is incorporated into the holding body 24 and is in hydraulic connection via a high-pressure connection (not shown) with a high-pressure fuel reservoir (also not shown) (so-called common rail).
- High-pressure channel 29 opens out on the lower end face of the holding body 24 and is hydraulically connected there to a bore 30 machined into the throttle disk 25.
- a nozzle body 31 with a central longitudinal recess 32 adjoins - in a sealing manner - the throttle disc 25, which narrows at its lower end (not shown in the drawing) to form a nozzle outlet.
- a nozzle needle, numbered 33 overall, is arranged in an axially movable manner in the longitudinal recess 32.
- a lower, tapered end of the nozzle needle 33 can be conical and interacts with the lower end of the longitudinal recess 32 forming a valve seat (not shown).
- the fuel under high pressure passes through the bore 30 - via an annular space 34 - into the longitudinal recess 32 of the nozzle body 31 and thus to the nozzle outlet.
- the nozzle needle 33 is surrounded at its upper end by a sleeve part 35 - leaving an annular gap 36 free - which is supported with its cutting-shaped upper end 37 on the underside of the throttle disk 25.
- a snap ring 39 inserted into an annular groove 38 of the nozzle needle 33 carries a retaining disk 40.
- a prestressed seat is located between the sleeve part 35 and the retaining disk 40
- Helical compression spring 41 which exerts a force on the nozzle needle 33 in the direction of arrow 42, ie in the direction of the closed position of the nozzle needle 33.
- the drawing also makes it clear that fuel under high pressure from the annular space 34 on the one hand - via a bore 43 - into a valve space 44 of the control valve 20, and on the other hand - via the annular gap 36 - into a control space 45.
- the control chamber 45 reaches its maximum volume in the closed position of the nozzle needle 33, the end of which closes the nozzle outlet (not shown). In the closed position, the nozzle needle 33 is held on the one hand by the liquid pressure prevailing in the control chamber 45 and on the other hand by the compression spring 41.
- a further bore 46 is machined, which on the one hand - via the bore 30 and the annular space 34 - with the high-pressure duct 29 and on the other hand - via a throttle bore 47 - with the control valve 20 in a hydraulic manner
- the throttle bore 47 acts as an inlet and outlet throttle.
- a space 48 is formed between the booster piston 14 and the control valve 20. In this area, a transverse bore 49 is machined into the translator housing 11, which serves to return the leak.
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)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10353169A DE10353169A1 (de) | 2003-11-14 | 2003-11-14 | Injektor zur Einspritzung von Kraftstoff in Brennräume von Brennkraftmaschinen, insbesondere piezogesteuerter Common-Rail-Injektor |
PCT/DE2004/002028 WO2005050003A1 (de) | 2003-11-14 | 2004-09-09 | Injektor zur einspritzung von kraftstoff in brennräume von brennkraftmaschinen, insbesondere piezoaktorgesteuerter common-rail-injektor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1692393A1 true EP1692393A1 (de) | 2006-08-23 |
EP1692393B1 EP1692393B1 (de) | 2007-07-25 |
Family
ID=34585079
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04786749A Active EP1692393B1 (de) | 2003-11-14 | 2004-09-09 | Injektor zur einspritzung von kraftstoff in brennräume von brennkraftmaschinen, insbesondere piezoaktorgesteuerter common-rail-injektor |
Country Status (9)
Country | Link |
---|---|
US (1) | US20070170286A1 (de) |
EP (1) | EP1692393B1 (de) |
JP (1) | JP2007510849A (de) |
KR (1) | KR20060120105A (de) |
CN (1) | CN1878949A (de) |
AT (1) | ATE368177T1 (de) |
BR (1) | BRPI0416579A (de) |
DE (2) | DE10353169A1 (de) |
WO (1) | WO2005050003A1 (de) |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4428357B2 (ja) * | 2006-04-03 | 2010-03-10 | 株式会社デンソー | 燃料噴射弁 |
DE102006050163A1 (de) * | 2006-10-25 | 2008-04-30 | Robert Bosch Gmbh | Injektor mit axial-druckausgeglichenem Steuerventil |
DE102006053126A1 (de) * | 2006-11-10 | 2008-05-15 | Robert Bosch Gmbh | Kraftstoff-Einspritzvorrichtung |
DE102007020966A1 (de) | 2007-05-04 | 2008-11-06 | Robert Bosch Gmbh | Piezo-Injektor |
DE102007047426A1 (de) | 2007-05-15 | 2008-11-20 | Robert Bosch Gmbh | Injektor mit Piezoaktor |
DE102007034318A1 (de) | 2007-07-24 | 2009-01-29 | Robert Bosch Gmbh | Injektor |
EP2280161A4 (de) | 2008-04-10 | 2013-07-10 | Bosch Corp | Einspritzanomalieerkennungssystem und common-rail-brennstoffeinspritzungssteuergerät |
DE102008040170A1 (de) | 2008-07-04 | 2010-01-07 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE102009002835A1 (de) | 2009-05-06 | 2010-11-11 | Robert Bosch Gmbh | Piezokeramik für einen Piezoaktor oder ein Piezoaktormodul |
DE102009026533A1 (de) | 2009-05-28 | 2010-12-02 | Robert Bosch Gmbh | Piezoaktormodul und Piezoinjektor |
DE102009029380A1 (de) | 2009-09-11 | 2011-03-24 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Herstellung eines piezokeramischen Bauelemets |
DE102009029489A1 (de) | 2009-09-16 | 2011-03-24 | Robert Bosch Gmbh | Piezoaktormodul und ein Verfahren zu dessen Herstellung |
DE102009045486A1 (de) | 2009-10-08 | 2011-04-14 | Robert Bosch Gmbh | Kraftstoff-Injektor |
DE102010001246A1 (de) | 2010-01-27 | 2011-07-28 | Robert Bosch GmbH, 70469 | Verfahren und Stoffe zur Herstellung einer Piezokeramik für einen Piezoaktor oder ein Piezoaktormodul |
DE102010008467A1 (de) | 2010-02-18 | 2011-08-18 | Continental Automotive GmbH, 30165 | Hochdruck-Kraftstoff-Einspritzventil für einen Verbrennungsmotor |
DE102010038451A1 (de) | 2010-07-27 | 2012-02-02 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE102010040874A1 (de) | 2010-09-16 | 2012-03-22 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE102010043360A1 (de) * | 2010-11-04 | 2012-05-10 | Robert Bosch Gmbh | Kraftstoffinjektor |
DE102010063540A1 (de) | 2010-12-20 | 2012-06-21 | Robert Bosch Gmbh | Brennstoffeinspitzventil |
DE102010064039A1 (de) | 2010-12-23 | 2012-06-28 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
CN102602142B (zh) * | 2011-01-18 | 2016-03-02 | 精工爱普生株式会社 | 液体喷射装置 |
DE102011002955A1 (de) | 2011-01-21 | 2012-07-26 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
WO2013045688A1 (en) | 2011-10-01 | 2013-04-04 | Robert Bosch Gmbh | An injection valve having wet actuator and simplified hydraulic transmission |
EP2602475A1 (de) | 2011-10-18 | 2013-06-12 | Robert Bosch Gmbh | Einspritzventil mit neuer Getriebegruppe |
DE102013206383A1 (de) * | 2013-04-11 | 2014-10-16 | Robert Bosch Gmbh | Kraftstoffeinspritzventil für Brennkraftmaschinen |
JP6365350B2 (ja) * | 2015-03-04 | 2018-08-01 | 株式会社デンソー | 燃料噴射弁 |
US10781777B2 (en) | 2017-08-23 | 2020-09-22 | Caterpillar Inc. | Fuel injector including valve seat plate having stress-limiting groove |
US11591995B2 (en) | 2020-09-15 | 2023-02-28 | Caterpillar Inc. | Fuel injector having valve seat orifice plate with valve seat and drain and re-pressurization orifices |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5779149A (en) * | 1996-07-02 | 1998-07-14 | Siemens Automotive Corporation | Piezoelectric controlled common rail injector with hydraulic amplification of piezoelectric stroke |
DE19936668A1 (de) * | 1999-08-04 | 2001-02-22 | Bosch Gmbh Robert | Common-Rail-Injektor |
DE10037388A1 (de) * | 2000-08-01 | 2002-02-21 | Bosch Gmbh Robert | Ventilanordnung, insbesondere für ein Kraftstoffeinspritzsystem einer Verbrennungsmaschine |
DE10111783B4 (de) * | 2001-03-12 | 2005-10-20 | Bosch Gmbh Robert | Einspritzdüse |
DE10158337C1 (de) * | 2001-11-28 | 2003-05-22 | Bosch Gmbh Robert | Kraftstoff-Einspritzvorrichtung, insbesondere Injektor für Brennkraftmaschinen mit Direkteinspritzung, sowie Kraftstoffsystem und Brennkraftmaschine |
DE10158588C1 (de) * | 2001-11-29 | 2003-05-22 | Bosch Gmbh Robert | Kraftstoff-Einspritzvorrichtung, Kraftstoffsystem sowie Brennkraftmaschine |
-
2003
- 2003-11-14 DE DE10353169A patent/DE10353169A1/de not_active Withdrawn
-
2004
- 2004-09-09 JP JP2006538640A patent/JP2007510849A/ja not_active Withdrawn
- 2004-09-09 KR KR1020067009230A patent/KR20060120105A/ko not_active Application Discontinuation
- 2004-09-09 EP EP04786749A patent/EP1692393B1/de active Active
- 2004-09-09 CN CNA2004800334007A patent/CN1878949A/zh active Pending
- 2004-09-09 WO PCT/DE2004/002028 patent/WO2005050003A1/de active IP Right Grant
- 2004-09-09 US US10/578,904 patent/US20070170286A1/en not_active Abandoned
- 2004-09-09 AT AT04786749T patent/ATE368177T1/de not_active IP Right Cessation
- 2004-09-09 BR BRPI0416579-9A patent/BRPI0416579A/pt not_active IP Right Cessation
- 2004-09-09 DE DE502004004465T patent/DE502004004465D1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2005050003A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20070170286A1 (en) | 2007-07-26 |
DE502004004465D1 (de) | 2007-09-06 |
EP1692393B1 (de) | 2007-07-25 |
CN1878949A (zh) | 2006-12-13 |
BRPI0416579A (pt) | 2007-01-30 |
JP2007510849A (ja) | 2007-04-26 |
WO2005050003A1 (de) | 2005-06-02 |
KR20060120105A (ko) | 2006-11-24 |
ATE368177T1 (de) | 2007-08-15 |
DE10353169A1 (de) | 2005-06-16 |
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