EP1456526A1 - Brennstoffeinspritzventil - Google Patents
BrennstoffeinspritzventilInfo
- Publication number
- EP1456526A1 EP1456526A1 EP02787392A EP02787392A EP1456526A1 EP 1456526 A1 EP1456526 A1 EP 1456526A1 EP 02787392 A EP02787392 A EP 02787392A EP 02787392 A EP02787392 A EP 02787392A EP 1456526 A1 EP1456526 A1 EP 1456526A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- actuator
- injection valve
- fuel injection
- seal
- valve according
- 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
- 239000000446 fuel Substances 0.000 title claims abstract description 37
- 238000002347 injection Methods 0.000 title claims abstract description 17
- 239000007924 injection Substances 0.000 title claims abstract description 17
- 239000012530 fluid Substances 0.000 claims abstract description 10
- 238000002485 combustion reaction Methods 0.000 claims abstract description 7
- 229920002545 silicone oil Polymers 0.000 claims 1
- 238000007789 sealing Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
-
- 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
- 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
- F02M2200/70—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
- 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
- F02M2200/707—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with means for avoiding fuel contact with actuators, e.g. isolating actuators by using bellows or diaphragms
-
- 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
- F02M61/08—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 opening in direction of fuel flow
Definitions
- the invention relates to a fuel injector according to the preamble of the main claim.
- a hydraulic coupler for a piezoelectric actuator in which the actuator transmits a lifting force to a master piston.
- the master piston is non-positively connected to a guide cylinder for a slave piston.
- the slave piston, the guide cylinder and the master piston closing the guide cylinder form a hydraulic chamber.
- a spring is arranged in the hydraulic chamber, which presses the master piston and the slave piston apart.
- a rubber sleeve is arranged around an end section of the guide cylinder and the slave piston, by means of which a storage space for a viscous hydraulic fluid is sealed off from a fuel space. The viscosity of the hydraulic fluid is adapted to the annular gap between the slave piston and the guide cylinder.
- the slave piston mechanically transmits a stroke movement to, for example, a valve needle. If the actuator on the master piston and the guide cylinder a stroke transmits, this stroke movement is transmitted by the pressure of the hydraulic fluid in the hydraulic chamber to the slave piston, since the hydraulic fluid in the hydraulic chamber cannot be compressed and only a small proportion of the hydraulic fluid through the annular gap during the short period of a stroke in the formed by the rubber sleeve Pantry can escape.
- the slave piston In the idle phase, when the actuator does not exert any pressure on the master piston, the slave piston is pressed out of the guide cylinder by the spring and the hydraulic fluid penetrates through the annular gap into the hydraulic chamber and fills it up again. As a result, the coupler automatically adjusts to the linear expansion and pressure-related expansion of a fuel injector.
- a disadvantage of the known prior art is that the sealing by a rubber sleeve, which is usually pressed by two clamping rings against the end section of the guide cylinder and the slave piston, is only incomplete in the long run.
- the highly viscous hydraulic fluid and the fuel can mix and the coupler can fail. If fuel, for example gasoline, gets into the interior of the coupler, a malfunction can occur since, due to the low viscosity of the gasoline, this liquid can pass through the annular gap too quickly and no pressure can build up in the pressure chamber during the stroke.
- the fuel injector according to the invention with the characterizing features of the main claim has the advantage over the fact that the pressure chamber is sealed by a seal both on the master piston and on the slave piston against an actuator chamber and a fuel chamber.
- This arrangement has the advantage of completely sealing the coupler against the ingress of fuel.
- a simple construction is particularly advantageous, which does not require the use of springs to act on the transmitter and receiver pistons of the coupler.
- the seals have a corrugated tube shape and therefore also take over the resetting of the pistons in addition to their sealing function.
- the coupler is advantageously encapsulated in a two-part coupler housing, as a result of which the inflow-side corrugated pipe seal is not subjected to fuel pressure.
- the material of the seal can be chosen to be thinner, so that sufficient elasticity to compensate for the hydraulic medium is ensured.
- the coupler housing also enables easy pre-assembly.
- Another advantage is that the master piston and the slave piston are provided with different diameters and thus effective areas. This enables a path translation and the short stroke of the actuator can be translated over a larger travel range.
- An actuator spring in the form of a helical spring, which prestresses the actuator, can advantageously be arranged between the actuator and the coupler housing.
- Fig. 1 shows a schematic section through an embodiment of an inventive Fuel injector in the area of the coupler.
- Fig. 1 shows a schematic section of a fuel injector 1, wherein the region is a 'hydraulic coupler 2 shown.
- the fuel injection valve 1 is particularly suitable for injecting fuel directly into a combustion chamber of a mixture-compressing, spark-ignited internal combustion engine.
- the coupler 2 comprises a master piston 3, on which an actuating body 4 is supported.
- the actuating body 4 is widened on the inflow side to an actuator foot 5, against which a piezoelectric or agnetostrictive actuator 6 is applied.
- the actuator 6 can be constructed from a plurality of piezoelectric or magnetostrictive layers 7.
- a slave piston 8 is arranged on the downstream side of the master piston 3.
- the slave piston 8 and the encoder olben 3 are encapsulated in a two-part coupler housing 9.
- a first part 10 and a second part 11 of the coupler housing 9 are connected to one another, for example welded.
- DER master piston 3 is also connected via a first seal 12 formed corrugated tube and is welded to the master piston 3 with the second part 11 of the coupler housing '9 by means of welding and seals the coupler housing 9 from against an actuator chamber 21 in which the actuator 6 is arranged.
- a second seal 13, which is arranged on the outflow side of the second part 11 of the coupler housing 9 and is welded to it, is likewise of corrugated tube design and is connected to the slave piston 8.
- the second seal 13 seals the coupler housing 9 against a fuel chamber 17 loaded with fuel.
- the master piston 3 and the slave piston 8 can have different diameters or different effective ones Have end faces so that a translation of the actuator stroke up to a ratio of 3: 1 is made possible.
- a pressure chamber 14 is delimited by the seals 12 and 13, the second part 11 of the coupler housing 9 and the slave piston 8.
- the pressure chamber 14 is filled with a preferably highly viscous hydraulic medium.
- a highly viscous hydraulic medium has u. a the advantage that the requirements for the accuracy of the piston guide are lower than with a thin liquid medium. In addition, the tendency to cavitation can be reduced by the lower vapor pressure.
- a compensating bore 15 is formed, which enables the hydraulic medium to flow freely around the coupler 2 during slow movements of the master piston 3, for example due to temperature influences.
- the hydraulic medium can be filled into the pressure chamber 14 via a filling valve 16.
- An actuator spring 18 is clamped between the first part 10 of the coupler housing 9 and the actuator base 5, which is designed as a helical spring and biases the actuator 6.
- the arrangement of the first seal 12 between the first part 10 of the coupler housing 9, the master piston 3 and the second part 11 of the coupler housing 9 ensures that the first seal is not subjected to the pressure of the fuel flowing through the fuel injection valve 1.
- the material of the seal can be chosen to be so thin and / or elastic that the hydraulic medium can reach a sufficiently large displacement volume without escaping from the pressure chamber 14.
- the actuator 6 When the actuator 6 is supplied an electric "excitation voltage through a non-illustrated electrical lead, the layers stretch 7 of the actuator 6 from whereby the actuator foot 5 is pressed quickly in the outflow direction. The rapid movement is transmitted to the master piston 3 via the actuating body 4.
- the hydraulic medium located in a coupler gap 19 transmits the movement to the slave piston 8, with hydraulic medium being displaced via annular gaps 20.
- the slave piston 8 has a smaller effective area than the master piston 3, so that the small stroke of the actuator 6 is translated into a larger travel, for example a valve needle, which can be in operative connection with the slave piston 8. If the voltage exciting the actuator 6 is switched off, the actuator 6 contracts, thereby relieving the master piston 3.
- the invention is not limited to the exemplary embodiment shown and is also suitable, for example, for fuel injection valves 1 for mixture-compressing, self-igniting internal combustion engines.
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
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10159749A DE10159749A1 (de) | 2001-12-05 | 2001-12-05 | Brennstoffeinspritzventil |
DE10159749 | 2001-12-05 | ||
PCT/DE2002/004312 WO2003054377A1 (de) | 2001-12-05 | 2002-11-25 | Brennstoffeinspritzventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1456526A1 true EP1456526A1 (de) | 2004-09-15 |
EP1456526B1 EP1456526B1 (de) | 2005-09-14 |
Family
ID=7708137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02787392A Expired - Lifetime EP1456526B1 (de) | 2001-12-05 | 2002-11-25 | Brennstoffeinspritzventil |
Country Status (5)
Country | Link |
---|---|
US (1) | US7040550B2 (de) |
EP (1) | EP1456526B1 (de) |
JP (1) | JP2005513334A (de) |
DE (2) | DE10159749A1 (de) |
WO (1) | WO2003054377A1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10328573A1 (de) * | 2003-06-25 | 2005-01-13 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE10342772A1 (de) * | 2003-09-16 | 2005-04-21 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE10344880A1 (de) * | 2003-09-26 | 2005-04-14 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE10357454A1 (de) * | 2003-12-03 | 2005-07-07 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE10357189A1 (de) * | 2003-12-08 | 2005-07-07 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE102004024119B4 (de) * | 2004-05-14 | 2006-04-20 | Siemens Ag | Düsenbaugruppe und Einspritzventil |
DE102004031790A1 (de) | 2004-07-01 | 2006-01-26 | Robert Bosch Gmbh | Common-Rail-Injektor |
DE102007002402B4 (de) * | 2006-12-13 | 2014-12-31 | Siemens Aktiengesellschaft | Gaseinblasvorrichtung für einen Verbrennungsmotor |
JP5262764B2 (ja) * | 2009-01-29 | 2013-08-14 | 株式会社デンソー | インジェクタ |
DE102010027278B4 (de) * | 2010-07-15 | 2020-07-02 | Metismotion Gmbh | Thermisch volumenneutraler Hubübertrager sowie Dosierventil mit einem solchen Hubübertrager und Verwendung des Dosierventils |
DE102012204216A1 (de) * | 2012-03-16 | 2013-09-19 | Robert Bosch Gmbh | Baugruppe |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60139981A (ja) * | 1983-12-27 | 1985-07-24 | Saginomiya Seisakusho Inc | 圧電素子を利用した弁 |
JPH0519575Y2 (de) * | 1986-02-27 | 1993-05-24 | ||
JPS63158301A (ja) * | 1986-07-31 | 1988-07-01 | Toyota Motor Corp | 圧電アクチユエ−タ |
JPS6421263U (de) * | 1987-07-28 | 1989-02-02 | ||
JPH01144690A (ja) * | 1987-11-30 | 1989-06-06 | Ohkura Electric Co Ltd | 積層圧電アクチュエータ |
ATE192263T1 (de) | 1990-09-25 | 2000-05-15 | Siemens Ag | Anordnung für einen in hubrichtung wirkenden adaptiven, mechanischen toleranzausgleich für den wegtransformator eines piezoelektrischen aktors |
JPH07167327A (ja) * | 1993-12-17 | 1995-07-04 | Tdk Corp | アクチュエータの変位拡大機構 |
US5884695A (en) * | 1996-04-30 | 1999-03-23 | American Magotteaux Corporation | Boiler tube shield |
DE29708546U1 (de) * | 1997-05-14 | 1998-09-10 | FEV Motorentechnik GmbH & Co. KG, 52078 Aachen | Elektrischer Festkörperaktuator mit hydraulischer Übersetzung |
DE19743640A1 (de) * | 1997-10-02 | 1999-04-08 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
EP1046809B1 (de) | 1999-04-20 | 2005-08-10 | Siemens Aktiengesellschaft | Fluiddosiervorrichtung |
DE19940056A1 (de) | 1999-08-24 | 2001-03-22 | Siemens Ag | Dosiervorrichtung und Verfahren zur Dosierung |
DE19950760A1 (de) * | 1999-10-21 | 2001-04-26 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE19954537A1 (de) * | 1999-11-12 | 2001-05-17 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE19958704C2 (de) * | 1999-12-06 | 2002-10-02 | Siemens Ag | Vorrichtung zum Übertragen einer Aktorbewegung und Fluiddosierer mit einer solchen Vorrichtung |
DE19963568A1 (de) * | 1999-12-29 | 2001-07-05 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE19962177A1 (de) * | 1999-12-22 | 2001-07-12 | Siemens Ag | Hydraulische Vorrichtung zum Übertragen einer Aktorbewegung |
US6766965B2 (en) * | 2001-08-31 | 2004-07-27 | Siemens Automotive Corporation | Twin tube hydraulic compensator for a fuel injector |
-
2001
- 2001-12-05 DE DE10159749A patent/DE10159749A1/de not_active Withdrawn
-
2002
- 2002-11-25 US US10/467,211 patent/US7040550B2/en not_active Expired - Fee Related
- 2002-11-25 JP JP2003555063A patent/JP2005513334A/ja not_active Ceased
- 2002-11-25 EP EP02787392A patent/EP1456526B1/de not_active Expired - Lifetime
- 2002-11-25 DE DE50204297T patent/DE50204297D1/de not_active Expired - Lifetime
- 2002-11-25 WO PCT/DE2002/004312 patent/WO2003054377A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO03054377A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2005513334A (ja) | 2005-05-12 |
WO2003054377A1 (de) | 2003-07-03 |
EP1456526B1 (de) | 2005-09-14 |
US20040118950A1 (en) | 2004-06-24 |
DE50204297D1 (de) | 2005-10-20 |
DE10159749A1 (de) | 2003-06-12 |
US7040550B2 (en) | 2006-05-09 |
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