EP1876349A1 - Dispositif d'injection pour un injecteur - Google Patents

Dispositif d'injection pour un injecteur Download PDF

Info

Publication number: EP1876349A1
Authority: EP; European Patent Office
Prior art keywords: injector; tube; double; cover; fluid pipe
Prior art date: 2006-07-07
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

Application number

EP06014132A

Other languages

German (de)

English (en)

Other versions

EP1876349B1 (fr

Inventor

Marco Siringo

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Continental Automotive GmbH

Original Assignee

Siemens AG

Continental Automotive GmbH

Siemens Corp

Priority date (The priority date 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 date listed.)

2006-07-07

Filing date

2006-07-07

Publication date

2008-01-09

2006-07-07 Application filed by Siemens AG, Continental Automotive GmbH, Siemens Corp filed Critical Siemens AG

2006-07-07 Priority to EP06014132.2A priority Critical patent/EP1876349B1/fr

2008-01-09 Publication of EP1876349A1 publication Critical patent/EP1876349A1/fr

2016-05-18 Application granted granted Critical

2016-05-18 Publication of EP1876349B1 publication Critical patent/EP1876349B1/fr

Status Ceased legal-status Critical Current

2026-07-07 Anticipated expiration legal-status Critical

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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on 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
- 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

Definitions

the invention relates to an injector assembly for an injector.
the injector assembly comprises a double-tube-shaped fluid pipe and an injector cover.
Modern internal combustion engines often are designed very compact. In such internal combustion engines there is not much space for components, for example an injection valve, of the internal combustion engine. So, the injection valve has to be designed very compact. However, the injection valve has to be connected to a fuel connection and an electrical or hydraulic circuit for driving an actor of the injection valve. Further, such an injection valve has to be calibrated. In general, the two connections and means for calibrating the injection valve are very space consuming.
An injector assembly for an injector comprises a double-tube-shaped fluid pipe and an injector cover.
the injector cover has a fluid connection of the injector and a fluid line of the injector cover.
the fluid line of the injector cover communicates with the fluid connection of the injector.
the injector cover is at least partly arranged in the double-tube-shaped fluid pipe.
the injector cover and the double-tube-shaped fluid pipe are formed and arranged such that the relative axial position of the injector cover to the double-tube-shaped fluid pipe influences a fluid injection characteristic of the injector.
the injector assembly enables to create the injector fairly compact because the injector cover fulfills three different tasks: sealing up the inside of the injector, embodying the fluid connection, and enabling the calibration of the injector through its axial position relative to the double-tube-shaped fluid pipe.
the fluid injection characteristic may comprise, for example, a spray shape of the injected fluid, an average drop size, an amount of injected fluid in a given time etc.
the injector cover has at least a first and a second axial section.
the first axial section has a larger diameter than the second axial section of the injector cover.
the fluid connection of the injector is formed at the first axial section of the injector cover facing away from the second axial section of the injector cover. This contributes to that the injector cover fulfills the three tasks in a simple way.
the double-tube-shaped fluid pipe comprises an electrical connection path which penetrates the double-tube-shaped fluid pipe at least partly radially. This contributes very effectively to the compactness of the injector.
the double-tube-shaped fluid pipe has an outer tube and an inner tube for guiding the fluid between the outer and the inner tube of the double-tube-shaped fluid pipe.
the outer tube of the double-tube-shaped fluid pipe is radially coupled to the first axial section of the injector cover.
the inner tube of the double-tube-shaped fluid pipe is radially coupled to the second axial section of the injector cover.
the double-tube-shaped fluid pipe communicates with the fluid line of the injector cover.
the coupling of the first axial section with the outer tube enables the sealing of the inside of the injector against the environment.
the coupling of the second axial section to the inner tube enables the sealing of the inside of the inner tube against the fluid.
An injector 2 (figure 1) has a valve body 4 and a needle 6.
the needle 6 is arranged in a recess 8 of the valve body 4.
the needle 6 is movable in axial direction.
a first spring 10 forces the needle 6 via a spring washer 12 towards an actor 14 of the injector 2.
the actor 14 comprises a ground plate 16 and a top plate 18.
the actor 14 is a piezoelectric actuator.
the actor 14 is axially coupled to a hydraulic compensation device 20 at the top plate 18 of the actor 14.
the hydraulic compensation device may be arranged between the spring washer 12 and the ground plate 16 of the actor 14.
the injector 2 comprises an injector assembly (figure 2).
the injector assembly comprises a double-tube-shaped fluid pipe 21 and an injector cover 24.
the double-tube-shaped fluid pipe 21 comprises an inner tube 22 and an outer tube 23.
a fluid, preferably fuel, is guided to an injection nozzle in a free volume between the inner tube 22 and the outer tube 23 of the double-tube-shaped fluid pipe 21.
the injection nozzle is formed by the valve body 4 and the needle 6, if the needle 6 is outside of its closing position. In the closing position of the needle 6 the needle 6 and the valve body 4 prevent a fluid flow by closing the injection nozzle.
the injector cover 24 sealingly covers the injector.
the injector cover 24 preferably comprises a first axial section 26 and a second axial section 28.
the diameter of the first axial section 26 is larger than the diameter of the second axial section 28.
the first axial section 26 is radially coupled to the outer tube 23.
the second axial section 28 is radially coupled to the inner tube 22.
a fluid connection 30 of the injector is arranged at the first axial section 26 facing away from the second axial section 28.
a fluid line 32 of the injector cover 24 communicates with the fluid connection 30 and with the double-tube-shaped fluid pipe 21.
the fluid connection 30 is arranged for connecting the injector 2, for example, to an external fluid line.
the injector cover 24 preferably is welded at the first axial section 26 to the outer tube 23.
the fluid connection 30 of the injector and the fluid line 32 of the injector cover 24 preferably are produced by drilling two simple holes into the injector cover 24.
an O-ring 34 is arranged between the second axial section 28 and the inner tube 22, for sealing up the inside of the double-tube-shaped fluid pipe 21 against the fluid,
the actor 14 is connected to an electric circuit. If the actor 14 gets energized, the injector 14 increases its axial length in some microseconds. If the actor 14 increases its length in such a fast way, the hydraulic compensation device 20 reacts like a stiff body. So, the ground plate 16 of the injector 14 forces the needle 6 away from the compensation device 20. If the force of the actor 14 on the needle 6 is the same or bigger than the force of the first spring 10 on the needle 6, the needle 6 moves away from its closing position and away from the hydraulic compensation device 20. Then, the injection nozzle is formed at the tips of the valve body 4 and the needle 6. In this way, the fluid flow through the injection nozzle is enabled. If the injector 2 gets deenergized again, the actor 14 decreases its length in some microseconds and the needle 6 closes the injection nozzle. So, the fluid flow through the injection nozzle is prevented.
the hydraulic compensation device 20 compensates that thermal expansion.
the injector 2 has to be calibrated.
the injector cover 24 is at least partially arranged in the double-tube-shaped fluid pipe 21.
the hydraulic compensation device 20 is coupled to the actor 14 and the actor 14 is coupled to the spring washer 12 and the needle 6.
the injector cover 24 gets pressed towards the actor 14 with a given force.
fluid is injected through the injector 2 and the force on the injector cover 24, and in particular the relative axial position of the injector cover 24 to the double-tube-shaped fluid pipe is varied until the fluid injection characteristic of the injector 2 corresponds to a given fluid injection characteristic.
the force is held and the injector cover 24 is welded to the outer tube 23.
the injector 2 may be calibrated by forming a threat on the injector cover 24 and a corresponding threat on the double-tube-shaped fluid pipe 21. Then, the injector cover 24 may be screwed onto the double-tube-shaped fluid pipe 21. Then, while screwing the injector cover 24 to the double-tube-shaped fluid pipe 21, fluid is injected by the injector 2. If the fluid injection characteristic corresponds to the given fluid injection characteristic, the screwing is stopped.
the fluid injection characteristic may comprise a spray shape of the injected fluid, an amount of injected fluid in a given time and/or with a given fluid pressure, an average drop size, an average drop range etc.
the injector cover 24 fulfills three different tasks: sealingly covering up the injector 2, forming the fluid connection of the injector 2, and enabling the calibration of the injector 2. This is very space saving because instead of the injector cover 24, normally, there would have to be three different components for fulfilling the three different tasks.
the injector assembly comprises an electrical connection path 36 (figure 3).
the electrical connection path 36 penetrates the double-tube-shaped fluid pipe 21.
the electrical connection path 36 extends at least partly radially.
the electrical connection path 36 is arranged for the electrical contact of the actor 14 to the electrical circuit.
the electrical connection path 36 is sealed against the double-tube-shaped fluid pipe 21.
the injector cover 24 may comprise more axial sections.
the fluid connection 30 may be not arranged parallel to an axis of the injector 2 and/or not in an overlapping area with the axis of the injector 2. Further, there may be arranged further O-rings for sealing up the injector 2.

Landscapes

Engineering & Computer Science (AREA)
Chemical & Material Sciences (AREA)
Combustion & Propulsion (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)
Fuel-Injection Apparatus (AREA)

EP06014132.2A 2006-07-07 2006-07-07 Procédé permettant de calibrer un injectuer Ceased EP1876349B1 (fr)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
EP06014132.2A EP1876349B1 (fr)	2006-07-07	2006-07-07	Procédé permettant de calibrer un injectuer

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
EP06014132.2A EP1876349B1 (fr)	2006-07-07	2006-07-07	Procédé permettant de calibrer un injectuer

Publications (2)

Publication Number	Publication Date
EP1876349A1 true EP1876349A1 (fr)	2008-01-09
EP1876349B1 EP1876349B1 (fr)	2016-05-18

Family

ID=37453047

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP06014132.2A Ceased EP1876349B1 (fr)	2006-07-07	2006-07-07	Procédé permettant de calibrer un injectuer

Country Status (1)

Country	Link
EP (1)	EP1876349B1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE19932760A1 (de) *	1999-07-14	2001-01-18	Bosch Gmbh Robert	Brennstoffeinspritzventil
WO2005026558A1 (fr) *	2003-09-12	2005-03-24	Siemens Aktiengesellschaft	Systeme hydraulique a reservoir de compensation
EP1548854A1 (fr) *	2003-12-22	2005-06-29	Siemens VDO Automotive S.p.A.	Unité de actionneur et procédé de sa fabrication

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS57136859U (fr) *	1981-02-18	1982-08-26
DE102004021921A1 (de) *	2004-05-04	2005-12-01	Robert Bosch Gmbh	Brennstoffeinspritzventil

2006
- 2006-07-07 EP EP06014132.2A patent/EP1876349B1/fr not_active Ceased

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE19932760A1 (de) *	1999-07-14	2001-01-18	Bosch Gmbh Robert	Brennstoffeinspritzventil
WO2005026558A1 (fr) *	2003-09-12	2005-03-24	Siemens Aktiengesellschaft	Systeme hydraulique a reservoir de compensation
EP1548854A1 (fr) *	2003-12-22	2005-06-29	Siemens VDO Automotive S.p.A.	Unité de actionneur et procédé de sa fabrication

Also Published As

Publication number	Publication date
EP1876349B1 (fr)	2016-05-18

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EP2058511B1 (fr)	2011-02-16	Injecteur de carburant doté d'un capteur de pression de carburant
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CN100385108C (zh)	2008-04-30	压电致动器模件及其装配方法
US8069841B2 (en)	2011-12-06	Coupling arrangement and fuel injector
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EP1876349A1 (fr)	2008-01-09	Dispositif d'injection pour un injecteur
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US8757512B2 (en)	2014-06-24	Injector for a fluid
US9080538B2 (en)	2015-07-14	Injector assembly for an injection valve
JP4532557B2 (ja)	2010-08-25	内燃機関において燃料を噴射するためのインジェクタ
EP2700805B1 (fr)	2016-06-29	Pièce d'extension, soupape d'injection et ensemble de distribution de carburant
US7913929B2 (en)	2011-03-29	Modular outward opening piezo direct fuel injector
EP1918571B1 (fr)	2010-08-18	Injecteur de dosage de fluide
EP2075857B1 (fr)	2011-03-23	Agencement d'actionneur et soupape à injection
EP1413743B1 (fr)	2007-09-12	Buse d'injection de carburant
EP1826395A1 (fr)	2007-08-29	Dispositif d'accouplement pour relier un injecteur à un approvisionnement liquide
EP2067981B1 (fr)	2011-02-16	Ensemble de vanne pour soupape d'injection, et soupape d'injection
EP2080895B1 (fr)	2011-10-19	Agencement de compensation thermique et soupape d'injection
JP2011122464A (ja)	2011-06-23	燃料噴射弁
US20100090035A1 (en)	2010-04-15	Injection valve and method for its manufacturing

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