EP1651859A1 - Hydraulischer koppler und kraftstoffeinspritzventil - Google Patents
Hydraulischer koppler und kraftstoffeinspritzventilInfo
- Publication number
- EP1651859A1 EP1651859A1 EP04738650A EP04738650A EP1651859A1 EP 1651859 A1 EP1651859 A1 EP 1651859A1 EP 04738650 A EP04738650 A EP 04738650A EP 04738650 A EP04738650 A EP 04738650A EP 1651859 A1 EP1651859 A1 EP 1651859A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- booster
- piston
- coupler according
- booster piston
- coupler
- 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 15
- 238000002347 injection Methods 0.000 title claims abstract description 14
- 239000007924 injection Substances 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 abstract 2
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001960 triggered effect Effects 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
- 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
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
-
- 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
- F02M2200/705—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with means for filling or emptying hydraulic chamber, e.g. for compensating clearance or thermal expansion
- F02M2200/706—Valves for filling or emptying hydraulic chamber
-
- 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 hydraulic coupler for a fuel injection valve, with a booster piston that can be coupled to an actuator, in particular a piezo actuator, and with a further booster piston that can be coupled with a nozzle needle, a lifetime filling of a hydraulic medium being arranged between the two booster pistons to hydraulically couple the two booster pistons together.
- the invention also relates to a fuel injection valve.
- Hydraulic couplers are used to compensate for temperature differences between the actuator and the nozzle needle.
- service life filling is intended to clarify that the coupler is filled with hydraulic medium before commissioning and that this filling is no longer replaced or supplemented during the entire service life.
- high demands must be placed on tightness.
- Conventional couplers are often of complex construction and / or can only be filled with great effort.
- the object of the invention is therefore to provide a hydraulic coupler and a fuel injection valve of the type described at the outset, which are simple in construction and can be produced cost-effectively. representation Furthermore, the coupler to be created should be able to be filled with little effort.
- the task is in a hydraulic coupler for a fuel injection valve, with a booster piston that can be coupled to an actuator, in particular with a piezo actuator, and with a further booster piston that can be coupled with a nozzle needle, a lifetime filling of a hydraulic medium between the two booster pistons is arranged in order to hydraulically couple the two booster pistons to one another, solved in that one end of one of the booster pistons is guided in one end of the other booster piston, and in that a booster chamber formed between the end faces of the one booster piston and the other booster piston also an additional receiving space for hydraulic medium is connected, which is sealed by a spring sealing element.
- the spring sealing element serves on the one hand to seal the additional receiving space for hydraulic medium.
- the preload for the filling pressure can be provided by the spring sealing element.
- a preferred exemplary embodiment of the coupler is characterized in that a connecting channel is formed in the one booster piston, which connects the booster space to the additional receiving space for hydraulic medium. This considerably simplifies the construction of the coupler.
- Another preferred exemplary embodiment of the coupler is characterized in that the connecting channel is equipped with a throttle.
- the throttle enables the booster chamber to be filled after an injection and at the same time prevents a large volume flow of the hydraulic medium from escaping from the booster chamber in an uncontrolled manner.
- Another preferred exemplary embodiment of the coupler is characterized in that the throttle is rounded on one side in the filling direction. This further simplifies filling the translator room.
- the connecting channel comprises a through hole which runs in the longitudinal direction of the one booster piston. Through the through hole, the coupler can be filled easily before the first start-up.
- Another preferred exemplary embodiment of the coupler is characterized in that the through hole on the side of the one booster piston facing away from the booster chamber is closed by a sealing element.
- the sealing element can, for example, be a ball that is pressed against an associated seat by a screw.
- Another preferred exemplary embodiment of the coupler is characterized in that the additional receiving space for hydraulic medium from. an annular space is formed, which is arranged radially outside the one piston.
- the annular space is preferably connected to the transmission space via a through hole running in the radial direction in the one piston.
- Another preferred exemplary embodiment of the coupler is characterized in that the annular space is partially delimited in the axial direction by the other piston and by a fixed housing. This arrangement is particularly easy to implement in terms of production technology.
- Another preferred embodiment of the coupler is characterized in that between the other piston and the fixed housing part, a spring element is clamped.
- the spring element forms a return spring for the other booster piston.
- Another preferred exemplary embodiment of the coupler is characterized in that the additional receiving space for hydraulic medium is delimited radially on the outside by a corrugated bellows.
- the corrugated bellows acts both as a sealing element and as a spring element.
- Another preferred exemplary embodiment of the coupler is characterized in that the corrugated bellows is radial. Direction is deformable. As a result, the bellows can provide the pre-tension of the filling pressure.
- Figure 1 shows a part of a fuel injector with a hydraulic coupler in longitudinal section
- Figure 2 shows a bellows from Figure 1 in an enlarged view
- Figure 3 shows a throttle from Figure 1 in an enlarged view. Description of the embodiment
- a part of a fuel injector is shown in longitudinal section in FIG.
- fuel injection valves are used to inject the fuel, in particular gasoline, into the combustion chamber.
- the fuel injection valve comprises a valve housing 1, of which only an essentially circular body with a rectangular cross section is shown in FIG. 1 for reasons of clarity.
- the injection is triggered by a piezo actuator 4, which acts on a first booster piston 6.
- the first booster piston 6 is hydraulically coupled to a second booster piston 7.
- an essentially circular end face 8 is formed, against which the piezo actuator 4 rests.
- a central blind hole 9 is formed, which has a substantially circular cylindrical shape.
- One end of the second booster piston 7 is guided in the blind hole 9 in a sealing manner.
- the guide enables the two booster pistons 6 and 7 to move relative to one another in the axial direction.
- the end face 12 of the second booster piston 7 facing the first booster piston 6 delimits a booster chamber 14 in the blind hole 9.
- the booster room 14 is filled with a hydraulic medium, such as silicone oil, in order to enable hydraulic coupling between the two booster pistons 6 and 7.
- the booster chamber 14 is connected to an additional receiving space 15, which is arranged radially outside the second booster piston 7 between the valve housing 1 and the first booster piston 6.
- the additional receiving space 15 forms an annular space which is radially on the inside through the second translator column. ben 7, in the axial direction by the first booster piston 6 and the valve housing 1, and radially on the outside by a bellows 17.
- the corrugated bellows 17 is fastened to the first booster piston 6 in a sealing manner with the aid of a weld seam 20. On the other hand is the bellows 17 with the help of a
- a return spring 24 for example a helical compression spring, is biased in the axial direction between the first booster piston 6 and the valve housing 1.
- the return spring 24 serves to reset the first booster piston 6 after actuation of the piezo actuator 4.
- a central through hole 28 is provided in the second booster piston 7 and runs in the direction of the longitudinal axis of the piston.
- a throttle 29 with a narrowed cross section is formed at the end of the through hole 28 facing the translation chamber 14. At the other end of the through hole 28 is one
- Diameter extension 30 arranged with an internal thread.
- a transverse bore 32 extends from the through hole 28 and opens into the additional receiving space 15.
- the central through hole 28 is closed by a spherical sealing element 34 which is pressed against an associated seat by means of a screw 36 which is screwed into the internal thread of the diameter extension 30.
- the translation chamber 14 and the additional receiving space 15 are filled with a hydraulic medium, such as silicone oil, via the through hole 28 and the transverse bore 32.
- a hydraulic medium such as silicone oil
- the through hole 28 is closed by the spherical sealing element 34 and the screw 36.
- the over Setter space 14 communicates with the additional receiving space 15 via the through hole 28 and the transverse bore 32.
- the corrugated bellows 17 can be deformed in the radial direction in the direction of an arrow 40 when the additional holding space 15 is filled. Such a radial deformation of the bellows 17 is indicated at 17 '.
- the deformation of the corrugated bellows 17 to 17 ′ enables the filling pressure to be preloaded in the additional receiving space 15. This preload also acts in the transmission chamber 14 via the transverse bore 32, the through hole 28 and the throttle 29.
- the booster chamber 14 is sealed by the guide between the two booster pistons 6 and 7.
- the throttle 29 is used to quickly fill the booster chamber 14 after an injection.
- the prestress for the pressure drop required to fill the booster chamber 14 is provided by the corrugated bellows 17, which exerts both a sealing effect and a spring effect.
- the corrugated bellows 17 is designed such that it can expand not only in the axial direction but also in the radial direction.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Glass Compositions (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10332874A DE10332874A1 (de) | 2003-07-19 | 2003-07-19 | Hydraulischer Koppler und Kraftstoffeinspritzventil |
PCT/DE2004/001198 WO2005010343A1 (de) | 2003-07-19 | 2004-06-09 | Hydraulischer koppler und kraftstoffeinspritzventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1651859A1 true EP1651859A1 (de) | 2006-05-03 |
EP1651859B1 EP1651859B1 (de) | 2010-11-03 |
Family
ID=34041961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04738650A Expired - Lifetime EP1651859B1 (de) | 2003-07-19 | 2004-06-09 | Hydraulischer koppler und kraftstoffeinspritzventil |
Country Status (8)
Country | Link |
---|---|
US (1) | US20060214021A1 (de) |
EP (1) | EP1651859B1 (de) |
JP (1) | JP4478681B2 (de) |
KR (1) | KR20060060659A (de) |
AT (1) | ATE487051T1 (de) |
DE (2) | DE10332874A1 (de) |
TW (1) | TW200504282A (de) |
WO (1) | WO2005010343A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004005456A1 (de) | 2004-02-04 | 2005-08-25 | Robert Bosch Gmbh | Kraftstoffinjektor mit direktgesteuertem Einspritzventilglied |
EP2273099B1 (de) * | 2009-06-17 | 2012-02-22 | Delphi Technologies, Inc. | Kraftstoffeinspritzer und Spielausgleich |
DE102010029123A1 (de) * | 2010-05-19 | 2011-11-24 | Robert Bosch Gmbh | Kraftstoffinjektor mit hydraulischer Kopplereinheit |
US9562497B2 (en) | 2014-06-18 | 2017-02-07 | Caterpillar Inc. | Engine system having piezo actuated gas injector |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0656162B2 (ja) * | 1987-03-03 | 1994-07-27 | トヨタ自動車株式会社 | ストロ−ク可変装置 |
DE4306072C2 (de) * | 1993-02-26 | 1994-12-08 | Siemens Ag | Vorrichtung zum Öffnen und Verschließen einer in einem Gehäuse vorhandenen Durchtrittsöffnung |
DE29708546U1 (de) * | 1997-05-14 | 1998-09-10 | FEV Motorentechnik GmbH & Co. KG, 52078 Aachen | Elektrischer Festkörperaktuator mit hydraulischer Übersetzung |
DE19838862A1 (de) * | 1998-08-26 | 2000-03-09 | Siemens Ag | Dosiervorrichtung |
DE19854506C1 (de) * | 1998-11-25 | 2000-04-20 | Siemens Ag | Dosiervorrichtung |
DE19946828C1 (de) * | 1999-09-30 | 2001-07-12 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
DE19946831C1 (de) * | 1999-09-30 | 2001-07-12 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
DE19958704C2 (de) * | 1999-12-06 | 2002-10-02 | Siemens Ag | Vorrichtung zum Übertragen einer Aktorbewegung und Fluiddosierer mit einer solchen Vorrichtung |
DE19962177A1 (de) * | 1999-12-22 | 2001-07-12 | Siemens Ag | Hydraulische Vorrichtung zum Übertragen einer Aktorbewegung |
DE10148594A1 (de) * | 2001-10-02 | 2003-04-10 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
JP2005140223A (ja) * | 2003-11-06 | 2005-06-02 | Nippon M K S Kk | 制御弁 |
-
2003
- 2003-07-19 DE DE10332874A patent/DE10332874A1/de not_active Withdrawn
-
2004
- 2004-06-09 KR KR1020067001167A patent/KR20060060659A/ko not_active Application Discontinuation
- 2004-06-09 WO PCT/DE2004/001198 patent/WO2005010343A1/de active Application Filing
- 2004-06-09 JP JP2006520654A patent/JP4478681B2/ja not_active Expired - Lifetime
- 2004-06-09 AT AT04738650T patent/ATE487051T1/de active
- 2004-06-09 DE DE502004011854T patent/DE502004011854D1/de not_active Expired - Lifetime
- 2004-06-09 EP EP04738650A patent/EP1651859B1/de not_active Expired - Lifetime
- 2004-06-09 US US10/565,072 patent/US20060214021A1/en not_active Abandoned
- 2004-06-15 TW TW093117151A patent/TW200504282A/zh unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2005010343A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP4478681B2 (ja) | 2010-06-09 |
ATE487051T1 (de) | 2010-11-15 |
DE502004011854D1 (de) | 2010-12-16 |
JP2006528295A (ja) | 2006-12-14 |
WO2005010343A1 (de) | 2005-02-03 |
EP1651859B1 (de) | 2010-11-03 |
KR20060060659A (ko) | 2006-06-05 |
TW200504282A (en) | 2005-02-01 |
US20060214021A1 (en) | 2006-09-28 |
DE10332874A1 (de) | 2005-02-10 |
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