EP2003325A1 - Soupape de distribution, en particulier pour injecteur de carburant d'un moteur à combustion interne - Google Patents
Soupape de distribution, en particulier pour injecteur de carburant d'un moteur à combustion interne Download PDFInfo
- Publication number
- EP2003325A1 EP2003325A1 EP08104044A EP08104044A EP2003325A1 EP 2003325 A1 EP2003325 A1 EP 2003325A1 EP 08104044 A EP08104044 A EP 08104044A EP 08104044 A EP08104044 A EP 08104044A EP 2003325 A1 EP2003325 A1 EP 2003325A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coupler
- actuator
- piston
- valve
- control valve
- 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- Withdrawn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
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
- 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
-
- 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
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
Definitions
- the invention relates to a control valve, in particular for a fuel injector of an internal combustion engine according to the preamble of claim 1.
- Control valves for fuel injectors which are used as servo-valves for indirectly driving a nozzle needle of a fuel injector are known, for example from DE 103 22 672 A1 .
- These servo-valves comprise a piezo-actuator, which acts via a coupler module on a valve member which blocks a fluid flow from a valve chamber to a return channel in the closed position and connects the fluid flow from a rear control chamber of the nozzle needle with the return channel by opening a valve seat.
- the coupler connected between the piezoactuator and the valve member comprises a coupler piston guided in a coupler housing and a valve piston, between which a hydraulic cushion is located as a hydraulic coupler.
- the coupler piston On the coupler piston is a setting piece for adjusting the coupler gap, wherein the contact geometry of the Einstell Gis is carried out to the coupler piston substantially plan.
- an actuator head On the piezo actuator, an actuator head is designed with a spherical bearing geometry, which dips into an arcuate, concave depression on Einstell Gi. Since the adjusting aligns stationary to the valve plate, the radial position of the actuator head must be able to align with that of the setting piece. For this reason, the piezoelectric actuator is gimbal-mounted in the holding body with a ball / cone bearing geometry.
- Object of the present invention is to perform the gimbal bearing support geometry between the actuator head and the coupler piston with the least possible stroke loss and thereby bring no lateral forces and no torques in the piston.
- the joint is to perform the previous function without compromising and at the same time represent a cheaper construction.
- the object of the invention is achieved with the characterizing features of claim 1.
- the inventive connection point between the actuator head and the coupler piston creates a support geometry which eliminates the need for a separate adjustment piece. This creates a more cost effective construction.
- the storage of the piezo actuator in the holding body can remain unchanged from the prior art.
- An expedient embodiment of the gimbal connection point is that on the actuator-side end face of the coupler piston, a recess is formed in which rests a spherical support of an intermediate piece.
- the intermediate piece has opposite to the spherical bearing a flattening, with which the intermediate piece is attached to a punch-shaped projection of the actuator head.
- the intermediate piece can serve as an adjusting piece, wherein the size of the flattening determines the setting of the coupler gap of the coupler module. It is also expedient if the actuator head and the intermediate piece is formed in one piece.
- the figure shows a section of a fuel injector in a sectional view with a control valve.
- a fuel injector used for installation in an internal combustion engine of a motor vehicle for example, in the cited in the prior art DE 103 22 672 A1 described.
- This fuel injector has an injection valve member with a nozzle needle, which is exposed to a rear control chamber, which is connected via the control valve described in more detail below with a low-pressure return system, so that acting on a pressure shoulder of the nozzle needle high pressure of a common rail lifts the nozzle needle from a nozzle needle seat and thereby fuel is injected with the pressure prevailing in the common rail.
- the fuel injector shown in the figure has an injector body 10, a nozzle body 11, a valve plate 12 and a throttle plate 13, which are hydraulically tight clamped by means of a nozzle lock nut 15.
- a receiving space 16 and a high pressure bore 17 is formed in the injector body 11.
- a piezoelectric actuator 25 with an actuator base 26 and a coupler module 30 is arranged in the receiving space 16.
- a nozzle needle pressure chamber 18 is formed, in which a nozzle needle 19 is guided axially movable.
- the nozzle needle 19 is exposed at the rear end of a control chamber 20 which is surrounded radially by a control chamber sleeve 21 which separates the control chamber 20 from the nozzle needle pressure chamber 18 hydraulically.
- In the nozzle needle pressure chamber 18 performs a guided through the throttle plate 15 high-pressure bore 22 and guided through the valve plate 13 further high-pressure bore 23, which are hydraulically in communication with the high-pressure bore 17.
- These hydraulic compounds are used to store the fuel stored in the common rail with the prevailing system pressure in the nozzle needle pressure chamber 18, which is exposed to the nozzle needle 19 with a pressure shoulder, not shown.
- the coupler module 30 comprises a coupler housing 31, a spring sleeve 32, a coupler piston 33, a valve piston 34, a valve piston spring 35 and a shim 36.
- the coupler housing 31 rests with a collar 37 on the valve plate 12. At the collar 37 also engages the spring sleeve 32, on which the shim 36 rests.
- the coupler piston 33 is supported with a Kopplerkolbenbund 38.
- Kopplerkolbenbund 38 an actuator-side end face 55 is formed.
- the coupler piston 33 and the valve piston 34 are guided in guides formed on the coupler housing 31, respectively.
- the pointing into the coupler housing 31 end faces of the coupler piston 31 and the valve piston 34 are spaced from each other, so that between the end faces of a coupler gap 39 is formed, which is filled in the guides of the coupler piston 31 and the valve piston 34 existing leakage gaps with the hydraulic medium , As a result, the coupler module 30 with the coupler gap 39 acts as a hydraulic coupler to compensate for elongations of the piezoelectric actuator 25.
- valve member 40 is arranged with a valve element 41.
- the valve element 41 is mounted in a valve chamber 42 and is held by a valve spring 43 against a valve seat 44.
- a valve piston formed on the valve piston 34 acts 45, with which the valve element 41 can be pushed off the valve seat 44.
- the valve piston 34 is biased by the valve piston spring 35 in the direction of the valve element 41.
- a gimbal connection point 50 is formed between coupler piston 33 and actuator head 26 .
- an example V-shaped recess 51 is formed on the actuator-side end face 55 of the Kopplerkolbenbundes 38.
- the actuator head 26 tapers trumpet-shaped into a cylindrical, punch-shaped shoulder 53, on which an intermediate piece 54 with a spherical support 56 is formed.
- the intermediate piece 54 has opposite to the spherical support 56 a flattening 57, with the the intermediate piece 54 is attached to the stamp-shaped projection 53 of the actuator head 26. Due to the size of the flattening 57, the intermediate piece 54 serve as a setting piece for adjusting a coupler gap 39.
- the actuator 25 rests with the spherical support 56 of the intermediate piece 54 in the recess 51 of the coupler piston 33.
- control chamber 20 is relieved of pressure and acting in the opening direction of the pressure shoulder of the nozzle needle 19 opening forces exceed the forces acting in the control chamber 20 closing forces, so that the fuel from the nozzle needle pressure chamber 18 is injected with system pressure of the common rail.
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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710026891 DE102007026891A1 (de) | 2007-06-11 | 2007-06-11 | Steuerventil, insbesondere für einen Kraftstoffinjektor einer Brennkraftmaschine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2003325A1 true EP2003325A1 (fr) | 2008-12-17 |
Family
ID=39790390
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08104044A Withdrawn EP2003325A1 (fr) | 2007-06-11 | 2008-05-21 | Soupape de distribution, en particulier pour injecteur de carburant d'un moteur à combustion interne |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2003325A1 (fr) |
JP (1) | JP2008303879A (fr) |
DE (1) | DE102007026891A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6443109B2 (ja) * | 2015-02-17 | 2018-12-26 | 株式会社Soken | 燃料噴射弁 |
JP6380323B2 (ja) | 2015-10-02 | 2018-08-29 | 株式会社デンソー | 燃料噴射装置 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0816670A1 (fr) * | 1996-07-02 | 1998-01-07 | Siemens Automotive Corporation | Injecteur commande par élément piézoélectrique avec amplification de la course |
US5875764A (en) * | 1998-05-13 | 1999-03-02 | Siemens Aktiengesellschaft | Apparatus and method for valve control |
DE19844996A1 (de) * | 1998-09-30 | 2000-04-13 | Siemens Ag | Vorrichtung und Verfahren zur Dosierung von Fluid |
DE10140201A1 (de) * | 2001-08-16 | 2003-02-27 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten mit einer Federhülse und Verfahren zur Herstellung einer Federhülse |
DE10322672A1 (de) | 2003-05-20 | 2004-12-09 | Robert Bosch Gmbh | Ventil zum Steuern von Flüssigkeiten |
EP1593841A1 (fr) * | 2004-05-04 | 2005-11-09 | Robert Bosch Gmbh | Soupape d'injection de carburant |
DE102005042786A1 (de) * | 2005-09-08 | 2007-03-22 | Siemens Ag | Kraftstoffinjektor mit hermetisch abgedichtetem Hydrauliksystem |
-
2007
- 2007-06-11 DE DE200710026891 patent/DE102007026891A1/de not_active Withdrawn
-
2008
- 2008-05-21 EP EP08104044A patent/EP2003325A1/fr not_active Withdrawn
- 2008-06-10 JP JP2008151349A patent/JP2008303879A/ja active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0816670A1 (fr) * | 1996-07-02 | 1998-01-07 | Siemens Automotive Corporation | Injecteur commande par élément piézoélectrique avec amplification de la course |
US5875764A (en) * | 1998-05-13 | 1999-03-02 | Siemens Aktiengesellschaft | Apparatus and method for valve control |
DE19844996A1 (de) * | 1998-09-30 | 2000-04-13 | Siemens Ag | Vorrichtung und Verfahren zur Dosierung von Fluid |
DE10140201A1 (de) * | 2001-08-16 | 2003-02-27 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten mit einer Federhülse und Verfahren zur Herstellung einer Federhülse |
DE10322672A1 (de) | 2003-05-20 | 2004-12-09 | Robert Bosch Gmbh | Ventil zum Steuern von Flüssigkeiten |
EP1593841A1 (fr) * | 2004-05-04 | 2005-11-09 | Robert Bosch Gmbh | Soupape d'injection de carburant |
DE102005042786A1 (de) * | 2005-09-08 | 2007-03-22 | Siemens Ag | Kraftstoffinjektor mit hermetisch abgedichtetem Hydrauliksystem |
Also Published As
Publication number | Publication date |
---|---|
DE102007026891A1 (de) | 2008-12-18 |
JP2008303879A (ja) | 2008-12-18 |
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