EP1593837B1 - Fuel injection valve - Google Patents

Fuel injection valve Download PDF

Info

Publication number
EP1593837B1
EP1593837B1 EP20050101635 EP05101635A EP1593837B1 EP 1593837 B1 EP1593837 B1 EP 1593837B1 EP 20050101635 EP20050101635 EP 20050101635 EP 05101635 A EP05101635 A EP 05101635A EP 1593837 B1 EP1593837 B1 EP 1593837B1
Authority
EP
European Patent Office
Prior art keywords
actuator
valve
fuel injection
hydraulic coupler
electrically
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.)
Expired - Fee Related
Application number
EP20050101635
Other languages
German (de)
French (fr)
Other versions
EP1593837A1 (en
Inventor
Uwe Liskow
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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.)
Filing date
Publication date
Priority to DE102004021920 priority Critical
Priority to DE200410021920 priority patent/DE102004021920A1/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1593837A1 publication Critical patent/EP1593837A1/en
Application granted granted Critical
Publication of EP1593837B1 publication Critical patent/EP1593837B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603Injectors peculiar thereto with means directly operating the valve needle using piezo-electric or magnetostrictive operating means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/167Means for compensating clearance or thermal expansion

Description

    State of the art
  • The invention relates to a fuel injection valve according to the preamble of the main claim.
    There is already a fuel injector in the German patent application 103 60 449 has been proposed with a valve housing in which a piezoelectric actuator and a hydraulic coupler are arranged, wherein the piezoelectric actuator having a positive pole and a ground terminal and wherein the valve housing, an electrical connector is provided with a positive terminal and a ground terminal for contacting with a voltage source. The positive terminal of the piezoelectric actuator is connected to the positive terminal of the plug and the Massepol of the piezoelectric actuator to the ground terminal of the plug via a respective cable. Since the hydraulic coupler is disposed between the valve housing and the actuator in a portion of the fuel injector facing the plug, the cables must be routed from the plug around the coupler to the actuator. Since the hydraulic coupler performs thermally induced compensatory movements, the cables can not be tight, but must be relieved of strain by providing an additional length. The cables must not touch any neighboring parts as otherwise they could be worn through the many compensating movements over time. The disadvantage is that the cables are mechanically heavily loaded by the compensatory movements, so that after a predetermined life of the fuel injection valve cable break occurs due to fatigue or tear the soldering or welding of the cable. This leads to failure of the fuel injection valve
  • The DE 195 19 191 A1 discloses an injection valve with a valve housing in which an actuator and a hydraulic coupler are provided, wherein the electrical connections of the actuator protrude from the valve housing and thus are wirelessly contacted.
  • Advantages of the invention
  • The fuel injection valve according to the invention with the characterizing features of the main claim has the advantage that in a simple manner an improvement is achieved in that the service life of the fuel injector is increased by the Massepol the actuator with the ground terminal of the plug and the positive pole of the actuator the positive terminal are electrically connected wirelessly. In this way, the cable rupture failure of the fuel injection valve is prevented. By eliminating the two cables space is saved, so that the fuel injection valve can be made smaller.
  • The measures listed in the dependent claims advantageous refinements and improvements of the main claim fuel injector are possible.
  • It is particularly advantageous if the ground terminal of the actuator is electrically connected to the ground terminal of the plug via the valve housing and / or an actuator housing, since in this way an electrically conductive connection already existing in the fuel injection valve is used. In addition, the electromagnetic interference emission of the actuator is reduced by the ground contact of the actuator.
  • It is also advantageous if the positive pole of the actuator is electrically connected to the positive terminal via the hydraulic coupler, since in this way the power supply to the actuator takes place via an existing electrically conductive connection.
  • According to an advantageous embodiment, it is provided that the actuator is biased in an actuator sleeve between an actuator head and an actuator base to pressure and the ground of the actuator is electrically contacted with the actuator head, wherein the actuator head is electrically connected via the actuator sleeve with the actuator base. The actuator base is electrically connected via a valve needle, a shoulder of the valve needle and a return spring cooperating with the valve needle with the valve housing and / or the actuator housing.
  • Furthermore, it is advantageous if the positive terminal of the plug is electrically connected to a head part of the hydraulic coupler and the positive pole of the actuator to a foot part of the hydraulic coupler, wherein the head part and the foot part of the hydraulic coupler are in turn electrically conductively connected to each other via an elastic sealing element , In this way, the power supply via the hydraulic coupler is made possible.
  • It is advantageous if a first electrical insulation is provided between the hydraulic coupler and the actuator and a second electrical insulation between the hydraulic coupler and the valve housing, since in this way a short circuit is prevented.
  • drawing
  • An embodiment of the invention is shown in simplified form in the drawing and explained in more detail in the following description.
  • Description of the embodiment
  • The drawing shows schematically a fuel injection valve according to the invention.
  • The fuel injection valve is used for example in the so-called direct injection and serves to inject fuel, such as gasoline or diesel, in a combustion chamber of an internal combustion engine.
  • The fuel injection valve has a valve housing 1 with an input channel 2 for the fuel. The valve housing has, for example, a cup-shaped housing part 1.1 and a cup-shaped housing part 1.1 closing housing cover 1.2. The input channel 2 is provided for example in the housing cover 1.2.
  • In the valve housing 1 is a schematically illustrated actuator 3, for example, a piezoelectric or magnetostrictive actuator, arranged for the axial adjustment of a valve needle 4.
  • The valve needle 4 is provided axially movable in the valve housing 1 and has, for example, a needle shaft 7 facing the actuator 3 and a valve closing body 8 facing away from the actuator 3. The actuator 3 transmits its movement to the needle shaft 7 of the valve needle 4, whereby the valve closing body 8 cooperating with a valve seat 9 opens or closes the fuel injection valve. The fuel injection valve is for example a so-called outward-opening valve, the valve needle 4 executing a stroke in the direction of a combustion chamber 10. When the fuel injection valve is closed, the valve closing body 8 lies tight against the valve seat 9 with line or surface contact over its entire circumference and forms a sealing seat 11.
  • The piezoelectric actuator 3 consists of a plurality of piezoceramic layers, which perform an expansion in the axial direction by applying an electrical voltage. In this case, the so-called inverse piezoelectric effect is utilized in which electrical energy is converted into mechanical energy. The elongation of the piezoceramic layers generated by the application of the electrical voltage is transmitted to the valve needle 4, wherein the valve needle 4, for example, executes a stroke of 40 to 50 microns. After the valve opening, the actuator 3 is shortened by switching off the electrical voltage and the valve needle 4 is moved back by means of a return spring 14 in the direction of the valve seat 9 and closes the fuel injection valve.
  • The piezoelectric actuator 3 is arranged to protect against tensile and bending stresses, for example in an actuator sleeve 12 between an actuator head 16 and an actuator base 17, wherein the actuator sleeve 12, for example, designed as a so-called Bourdon tube and made of a metal, such as steel.
  • The actuator head 16 is arranged on an end face, the valve needle 4 remote from the end of the actuator sleeve 12 and connected to the actuator sleeve 12 cohesively and / or non-positively, for example by welding. The actuator foot 17 is arranged on an end-side, the valve needle 4 facing the end of the actuator sleeve 12 and also cohesively and / or non-positively connected to the actuator sleeve 12, for example by welding.
  • The actuator 3 is biased between the actuator head 16 and the actuator base 17 by means of the actuator sleeve 12 to pressure.
  • The needle shaft 7 of the valve needle 4 has a shoulder 18 against which the return spring 14 abuts with one end in order to press the needle shaft 7 of the valve needle 4 to the actuator base 17 of the actuator sleeve 12 and the valve closing body 8 in the direction of the valve seat 9.
  • Since the actuator 3 and the other components of the fuel injection valve, such as the valve housing 1, expand differently due to different thermal expansion coefficients with temperature change, a hydraulic coupler 15 is provided which compensates for the differences in the different linear expansion, to ensure that the fuel injection valve performs the same stroke with the valve needle 4, regardless of the respective temperature of the fuel injection valve. There must be no lifting losses, in which the stroke of the actuator 3 is not completely transmitted to the valve needle 4, so that the stroke of the valve needle 4 is smaller than the stroke of the actuator. 3
  • The hydraulic coupler 15 is arranged, for example, between the housing cover 1.2 and the actuator head 16 of the actuator sleeve 12.
  • The hydraulic coupler 15 has, for example, a pot-shaped cylinder 21 and an axially movable in the pot-shaped cylinder 21 piston 22. Between the pot-shaped cylinder 21 and the piston 22, a so-called coupler gap 23 is provided. Starting from the pot-shaped cylinder 21, an elastic sealing element 24, which is formed for example as a corrugated bellows and is made of metal, extends as far as the piston 22. The elastic sealing element 24 includes a coupler volume 25 which is flow-connected via a throttle element 28 to the coupler gap 23 is. The coupler volume 25 and the coupler gap 23 are filled with a liquid, for example fuel or a second medium, such as silicone oil. The pressure in the liquid of the coupler volume 25 is increased, for example by means of a spring element 26 by the spring element 26 exerts a compressive force from the outside on the elastic sealing element 24 or is provided within the elastic sealing element 24, for example in the piston 22, and a pressure force on the liquid of the coupler volume 25. For example, the piston 22 has a cavity, which via the throttle element 28 is connected to the coupler gap 23 and via a flow opening with the circumference of the piston 22.
  • When temporally fast acting on the hydraulic coupler 15 movement processes, such as the expansion of the actuator 3 when connected to an electrical voltage, the hydraulic coupler 15 behaves as an extremely rigid component, since in the short time almost no liquid from the coupler gap 23 through the Throttling element 28 can flow into the coupler volume 25. Thus, since the coupler gap 23 remains constant in this situation, the stroke of the actuator 3 is completely transferred to the valve needle 4.
  • With slow motion acting on the hydraulic coupler 15, such as stretching due to temperature changes, the coupler gap 23 decreases or increases because the liquid has enough time to flow out of the coupler gap 23 via the restrictor 28 or into the coupler gap 23 ,
  • The cylinder 21 of the hydraulic coupler 15 is, for example, the actuator 3 and the piston 22 of the hydraulic coupler 15 facing the housing cover 1.1 or vice versa. The housing lid 1.1 facing part of the hydraulic coupler 15 forms a head portion 29 and the actuator 3 facing part of a foot portion 30 of the hydraulic coupler 15th
  • The hydraulic coupler 15, the actuator 3 with the actuator sleeve 12 and the valve needle 4 are, for example, arranged concentrically to a valve axis 27.
  • The actuator sleeve 12 and the hydraulic coupler 15 are, for example, centered and fixed to one another, for example by means of an encapsulation 36, which extends from the actuator head 16 to the foot part 30 of the hydraulic coupler 15.
  • To encapsulate the actuator 3 and the hydraulic coupler 15 with respect to the fuel, an actuator housing 31 is provided in the valve housing 1, which hermetically encloses the actuator 3 and the hydraulic coupler 15 and seals against the fuel. The actuator housing 31 is designed, for example, cylindrical and divides the interior of the valve housing 1 into a fuel-laden and with the input channel. 2 flow-connected pressure chamber 32 and the actuator 3 and the hydraulic coupler 21 having actuator chamber 33. The actuator housing 31 is, for example, arranged concentrically in the valve housing 1 and supported at the front ends of the valve housing 1. For example, the actuator housing 31 is connected on the housing cover 1.2 facing end side cohesively and / or non-positively with the housing cover 1.2, for example, welded. The needle shaft 7 of the valve needle 4 extends in the actuator chamber 33 starting from the actuator base 17 in the direction away from the actuator 3 and passes through the actuator housing 31 through an opening 34 into the pressure chamber 32, wherein the opening 34 is sealed by an elastic seal 35, so that no Fuel from the pressure chamber 32 into the actuator chamber 33 passes. The seal 35 is formed, for example, as an elastic bellows, which is made for example of metal, and extends from the needle shaft 7, starting annularly to the actuator housing 31st
  • The return spring 14 rests with its one end against the shoulder 18 of the valve needle 4 and with the other end against the actuator housing 31.
  • The actuator 3 has a positive pole 38 and a grounding pole 39 which is the negative electrical pole. On the valve housing 1, for example on the housing cover 1.2, an example two-pole electrical connector 40 with a positive terminal 41 and a ground terminal 42 for contacting with an external voltage source 43 is provided. Depending on the position of a high-power switch 44, either a high voltage of the voltage source 43 or no voltage is applied to the plug 40. The high-power switch 44 is connected to a positive pole of the voltage source 43. The voltage source 43 is, for example, a transformer which, for example, increases a 12V on-board voltage of a vehicle to a high voltage.
  • According to the ground pole 39 of the actuator 3 to the ground terminal 42 of the plug 40 and the positive pole 38 of the actuator 3 to the positive terminal 41 of the plug 40 are each electrically connected wirelessly. The wireless connection avoids cable breaks that would cause the fuel injector to fail.
  • According to an advantageous embodiment of the ground terminal 39 of the actuator 3 via the actuator housing 31 and / or the valve housing 1 to the ground terminal 42 of the plug 40 is electrically connected. In this way, the electromagnetic interference emission of the actuator 3 is reduced.
  • The positive terminal 38 of the actuator 3 is electrically contacted, for example via the hydraulic coupler 15 to the positive terminal 41. According to this circuit, the current from the plug 40 is passed via the hydraulic coupler 15 to the actuator 3.
  • For example, the grounding pole 39 of the actuator 3 is electrically contacted with the actuator head 16, the actuator head 16 being connected to the actuator foot 17 via the actuator sleeve 12. The actuator base 17 in turn is electrically connected to the actuator housing 31 via the needle shaft 7 of the valve needle 4, the shoulder 18 of the valve needle 4 and the restoring spring 14 resting against the shoulder 18.
  • The positive connection 41 of the plug 30 is electrically connected, for example, to the head part 29 of the hydraulic coupler 15 and the positive pole 38 of the actuator 3 to a foot part 30 of the hydraulic coupler 15.
  • The head part 29 and the foot part 30 of the hydraulic coupler 15 are electrically conductively connected to each other via the elastic sealing element 24.
  • Between the hydraulic coupler 15 and the actuator 3, a first electrical insulation 46 and between the hydraulic coupler 15 and the valve housing 1, a second electrical insulation 47 is provided to a short circuit between the positive terminal 38 and the grounding pole 39 of the actuator 3 and between the positive terminal 41 and the ground terminal 42 of the plug 40 to prevent. The insulation 46,47 are, for example, disc-shaped and made of ceramic or other electrically insulating material.
  • The positive pole 38 of the actuator 3 extends, for example, through a passage opening 50 in the actuator head 16 and extends through the first electrical insulation 46 through a first opening 48 in order to achieve contact with the foot part 30 of the hydraulic coupler 15. The positive terminal 41 of the plug 40 extends through a connection channel 51 in the housing cover 1.2 and extends through the second electrical insulation 47, for example, through a second opening 49 in order to achieve a contact with the head part 29 of the hydraulic coupler 15.
  • The second insulation 47 can also be designed as a piezoceramic to evaluate the force curve of the actuator 3 and to use for controlling the injection.
  • The fuel is passed in the valve housing 1, starting from the inlet channel 2 in the pressure chamber 32 to the valve closing body 8 upstream of the sealing seat 11. When the fuel injection valve is opened, the valve closing body 8 lifts off from the sealing seat 11, whereby a connection to the combustion chamber 10 of the internal combustion engine is opened so that fuel flows out into the combustion chamber 10 via an annular outlet gap 52 formed between the valve closing body 8 and the valve seat 9. The larger the stroke of the valve needle 4 in the opening direction, the larger the output gap 52 and the more fuel is injected into the combustion chamber 10 per unit time.

Claims (7)

  1. Fuel injection valve having a valve housing, in which an actuator and a hydraulic coupler are arranged, the actuator having a positive pole and a ground pole and an electrical plug having a positive connection and a ground connection being provided on the valve housing for making contact with a voltage source, characterized in that the ground pole (39) of the actuator (3) is connected electrically without cables to the ground connection (42) of the plug (40) and the positive pole (38) of the actuator (3) is connected electrically without cables to the positive connection (41), in such a way that the ground pole (39) of the actuator (3) is electrically connected to the ground connection (42) of the plug (40) via the valve housing (1) and/or an actuator housing (31), and that the positive pole (38) of the actuator (3) is electrically connected to the positive connection (41) via the hydraulic coupler (15).
  2. Fuel injection valve according to Claim 1, characterized in that the actuator (3) is prestressed towards compression in an actuator sleeve (12) between an actuator head (16) and an actuator base (17), and the ground pole (39) of the actuator (3) is in electrical contact with the actuator head (16), the actuator head (16) being electrically connected to the actuator base (17) via the actuator sleeve (12).
  3. Fuel injection valve according to Claim 2, characterized in that the actuator base (17) is electrically connected to the valve housing (1) and/or the actuator housing (31) via a valve needle (4) and a restoring spring (14) which interacts with the valve needle (4).
  4. Fuel injection valve according to Claim 1, characterized in that the positive connection (41) of the plug (40) is electrically connected to a head part (29) of the hydraulic coupler (15) and the positive pole (38) of the actuator (3) is electrically connected to a base part (30) of the hydraulic coupler (15).
  5. Fuel injection valve according to Claim 4, characterized in that the head part (29) and the base part (30) of the hydraulic coupler (15) are connected to one another in an electrically conducting manner via an elastic sealing element (24).
  6. Fuel injection valve according to Claim 1, characterized in that a first electrical insulation (46) is provided between the hydraulic coupler (15) and the actuator (3) and a second electrical insulation (47) is provided between the hydraulic coupler (15) and the valve housing (1).
  7. Fuel injection valve according to Claim 1, characterized in that the hydraulic coupler (15) is arranged between the valve housing (1) and the actuator (3) in a section of the fuel injection valve which faces the plug (40).
EP20050101635 2004-05-04 2005-03-03 Fuel injection valve Expired - Fee Related EP1593837B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102004021920 2004-05-04
DE200410021920 DE102004021920A1 (en) 2004-05-04 2004-05-04 Fuel injector

Publications (2)

Publication Number Publication Date
EP1593837A1 EP1593837A1 (en) 2005-11-09
EP1593837B1 true EP1593837B1 (en) 2007-09-19

Family

ID=34938872

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050101635 Expired - Fee Related EP1593837B1 (en) 2004-05-04 2005-03-03 Fuel injection valve

Country Status (3)

Country Link
US (1) US7267111B2 (en)
EP (1) EP1593837B1 (en)
DE (2) DE102004021920A1 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1511932B1 (en) * 2002-04-04 2006-11-29 Siemens Aktiengesellschaft Injection valve
DE112004000356D2 (en) * 2003-03-27 2006-02-23 Siemens Ag Direct injection valve in a cylinder head
DE10357189A1 (en) * 2003-12-08 2005-07-07 Robert Bosch Gmbh Fuel injector
DE102005024049A1 (en) * 2005-05-25 2006-11-30 Robert Bosch Gmbh Fuel injection device, in particular for an internal combustion engine with direct fuel injection
FR2918123A1 (en) * 2007-06-27 2009-01-02 Renault Sas Fluid injection device.
US8100346B2 (en) * 2007-11-30 2012-01-24 Caterpillar Inc. Piezoelectric actuator with multi-function spring and device using same
US8074625B2 (en) 2008-01-07 2011-12-13 Mcalister Technologies, Llc Fuel injector actuator assemblies and associated methods of use and manufacture
US7950596B2 (en) * 2008-06-27 2011-05-31 Caterpillar Inc. Distributed stiffness biasing spring for actuator system and fuel injector using same
DE102009015738B4 (en) * 2009-03-31 2016-02-11 Siemens Aktiengesellschaft Hydraulic Stroke Translator and Injector for Dossing of Fluids
DE102010040612A1 (en) * 2010-09-13 2012-03-15 Siemens Aktiengesellschaft Hydraulic temperature compensator and hydraulic lift transmitter
DE102012204216A1 (en) * 2012-03-16 2013-09-19 Robert Bosch Gmbh module
US9091238B2 (en) * 2012-11-12 2015-07-28 Advanced Green Technologies, Llc Systems and methods for providing motion amplification and compensation by fluid displacement
US9309846B2 (en) 2012-11-12 2016-04-12 Mcalister Technologies, Llc Motion modifiers for fuel injection systems
DE102013012444A1 (en) * 2013-07-29 2015-01-29 Astrium Gmbh Valve assembly for switching and / or regulating a media flow of a spacecraft and spacecraft
DE102013219225A1 (en) * 2013-09-25 2015-03-26 Continental Automotive Gmbh Piezo injector for direct fuel injection
DE102013224771A1 (en) * 2013-12-03 2015-06-03 Robert Bosch Gmbh Piezoelectric actuator and its use
KR20160045889A (en) * 2014-02-24 2016-04-27 가부시키가이샤 후지킨 Piezoelectric linear actuator, piezoelectrically driven valve, and flow rate control device
DE102015207239A1 (en) * 2015-04-21 2016-10-27 Robert Bosch Gmbh Gas valve

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2721100A (en) * 1951-11-13 1955-10-18 Jr Albert G Bodine High frequency injector valve
US3418980A (en) * 1965-09-01 1968-12-31 Physics Internat Company Fuel injector-ignitor system for internal combustion engines
US3391680A (en) * 1965-09-01 1968-07-09 Physics Internat Company Fuel injector-ignitor system for internal combustion engines
US3500799A (en) * 1967-09-27 1970-03-17 Physics Int Co Electromechanical control system
US3598506A (en) * 1969-04-23 1971-08-10 Physics Int Co Electrostrictive actuator
US4471256A (en) * 1982-06-14 1984-09-11 Nippon Soken, Inc. Piezoelectric actuator, and valve apparatus having actuator
US4649886A (en) * 1982-11-10 1987-03-17 Nippon Soken, Inc. Fuel injection system for an internal combustion engine
DE3533085A1 (en) * 1985-09-17 1987-03-26 Bosch Gmbh Robert Metering valve for dosing liquids or gases
DE19519191C2 (en) * 1995-05-24 1997-04-10 Siemens Ag Injector
DE19650900A1 (en) * 1996-12-07 1998-06-10 Bosch Gmbh Robert Piezoelectric actuator
DE19901711A1 (en) * 1999-01-18 2000-07-20 Bosch Gmbh Robert Fuel injector and method for operating a fuel injector
DE60043181D1 (en) * 2000-04-01 2009-12-03 Bosch Gmbh Robert Method and device for controlling voltages and voltage gradients for driving a piezoelectric element
ITBO20010279A1 (en) * 2001-05-08 2002-11-08 Magneti Marelli Spa Fuel injector with piezoelectric actuator housed in a sealed chamber
ITBO20010280A1 (en) * 2001-05-08 2002-11-08 Magneti Marelli Spa Fuel injector with piezoelectric actuator
DE10149915A1 (en) * 2001-10-10 2003-04-24 Bosch Gmbh Robert Fuel injection valve for IC engine fuel injection system has piezoelectric or magnetistrictive actuator enclosed by thermal expansion compensation sleeve
JP4032729B2 (en) * 2001-12-19 2008-01-16 松下電器産業株式会社 Fluid application method
EP1511932B1 (en) * 2002-04-04 2006-11-29 Siemens Aktiengesellschaft Injection valve
DE10360451B4 (en) 2003-02-27 2014-01-09 Robert Bosch Gmbh Fuel injector

Also Published As

Publication number Publication date
US7267111B2 (en) 2007-09-11
US20050247803A1 (en) 2005-11-10
EP1593837A1 (en) 2005-11-09
DE502005001511D1 (en) 2007-10-31
DE102004021920A1 (en) 2005-12-01

Similar Documents

Publication Publication Date Title
EP1030969B1 (en) Fuel injection valve and pressure sensor combination
US6929192B2 (en) Valve for controlling fluids and method for measuring pressures
JP4126014B2 (en) Fuel injection valve
US6585171B1 (en) Fuel injection valve
CN1175179C (en) Fuel injection valve
US7185621B2 (en) Glow plug with combustion pressure detecting function
US6274967B1 (en) Piezoelectric actuator for a servo drive, servo drive with a piezoelectric actuator and method of producing a piezoelectric actuator
US6948667B2 (en) Fuel injector
DE10251225B4 (en) Piezoactuator contact for injector
US7624620B2 (en) Combustion pressure sensor
US20110005308A1 (en) Pressure Measuring Device
JP4272996B2 (en) Fuel injection valve
JP5230924B2 (en) Pressure pickup glow device
US6889913B2 (en) Fuel injector
JP2004278934A (en) Glow plug with combustion pressure detection function
KR100853645B1 (en) Fuel injection valve
DE19919313B4 (en) Fuel injector
CN100466315C (en) Tube spring for an actuator, and method for mounting said tube spring
EP1756415B1 (en) Fuel injector with variable actuator transmission
JP2005517119A (en) Fuel injection valve
EP1370765B1 (en) Fuel injection valve
KR20000015898A (en) Fuel injection valve with a piezo-electric or magnetostrictive actuator
EP1497553B1 (en) Dosing device for fluids, especially a motor vehicle injection valve
US6969009B2 (en) Injector, especially fuel injection valve, with a piezoelectric actor
KR20010113652A (en) Fuel injection valve and method for operating a fuel injection valve

Legal Events

Date Code Title Description
AX Request for extension of the european patent to

Extension state: AL BA HR LV MK YU

AK Designated contracting states:

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

17P Request for examination filed

Effective date: 20060509

AKX Payment of designation fees

Designated state(s): DE FR GB IT

17Q First examination report

Effective date: 20061129

AK Designated contracting states:

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 502005001511

Country of ref document: DE

Date of ref document: 20071031

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20080103

ET Fr: translation filed
26N No opposition filed

Effective date: 20080620

REG Reference to a national code

Ref country code: DE

Ref legal event code: R084

Ref document number: 502005001511

Country of ref document: DE

Effective date: 20111025

PGFP Postgrant: annual fees paid to national office

Ref country code: IT

Payment date: 20120326

Year of fee payment: 8

PGFP Postgrant: annual fees paid to national office

Ref country code: GB

Payment date: 20130318

Year of fee payment: 9

Ref country code: FR

Payment date: 20130329

Year of fee payment: 9

PGFP Postgrant: annual fees paid to national office

Ref country code: DE

Payment date: 20130523

Year of fee payment: 9

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502005001511

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20140303

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20141128

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502005001511

Country of ref document: DE

Effective date: 20141001

PG25 Lapsed in a contracting state announced via postgrant inform. from nat. office to epo

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141001

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140303

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140331

PG25 Lapsed in a contracting state announced via postgrant inform. from nat. office to epo

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140303