EP1445480B1 - Metering device with dynamic sealing - Google Patents
Metering device with dynamic sealing Download PDFInfo
- Publication number
- EP1445480B1 EP1445480B1 EP20030002402 EP03002402A EP1445480B1 EP 1445480 B1 EP1445480 B1 EP 1445480B1 EP 20030002402 EP20030002402 EP 20030002402 EP 03002402 A EP03002402 A EP 03002402A EP 1445480 B1 EP1445480 B1 EP 1445480B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve needle
- fluid chamber
- valve
- end position
- chamber
- 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 - Lifetime
Links
- 238000007789 sealing Methods 0.000 title claims description 24
- 239000012530 fluid Substances 0.000 claims description 31
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 239000000446 fuel Substances 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 239000012858 resilient material Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000003763 resistance to breakage Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- 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
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
- F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
-
- 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
- F02M61/04—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
-
- 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
-
- 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
- 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
Definitions
- the present invention relates to a metering device for dosing pressurized fluids, in particular an injection valve for a fuel injection system in an internal combustion engine, comprising a valve body with a fluid chamber for the pressurized fluid to be dosed, the fluid chamber terminating with a metering opening, an axially moveable valve needle passing through the fluid chamber, the valve needle having a first end that controls the opening and closing of the metering opening, and a second end that cooperates with an actuator assembly arranged in an actuator chamber and controlling the axial movement of the valve needle to be in a first end position in which the metering opening is closed and in a second end position in which the metering opening is open, and a sealing element hydraulically isolating the actuator chamber and the fluid chamber.
- the valve body 1 comprises an actuator chamber 9 and a fluid chamber 2 terminating with a metering opening 3, between which chambers the sealing element 101 - 10n is arranged.
- the axially moveable valve needle 4 passes through the fluid chamber 2.
- the valve needle 4 has a first end 5 that controls the opening and closing of the metering opening 3, and a second end 6 that cooperates with the actuator assembly 7, 8 arranged in the actuator chamber 9 and controlling the axial movement of the valve needle 4.
- the actuator assembly comprises a piezo stack 7 and a bottom cap 8.
- the bottom cap 8 of the actuator assembly is in Hertzian contact with the second end 6 of the valve needle 4, since the second end 6 of the valve needle 4 is biased against the bottom cap 8 by a helical spring 12, which is axially compressed arranged between a spring seat 14 of the valve body 1 and an abutting washer 13 fastened to the valve needle 4.
- the sealing element 101 - 10n is formed by a metal bellows 101, an element able to be axially deformed and to guarantee the required separation between the two described volumes, e.g. gasoline in the fluid chamber 2 and the piezo stack 7 as part of the actuator assembly outside, i.e. in the actuator chamber 9.
- the top collar of the metal bellows 101 is attached to a washer 10m that is attached on the valve needle 4 and the bottom collar of the metal bellows 101 is attached to a ring element 10n attached to the inner cylindrical surface 11 of the valve body 1.
- the metal bellows 101 offers a high mechanical elasticity in the direction of movement of the valve needle 4, a sufficient resistance to fuel pressures of up to 500 bar, and a high reliability with respect to leakage throughout the required temperature range of -40 °C to +150 °C.
- an injector with such a metal bellows with these dimensions has disadvantages of high component and manufacturing costs, as well as a complex assembly, requiring two hermetic welds to attach the metal bellows to the washer 10m and to the ring element 10n, as well as two hermetic welds to attach the washer 10m to the valve needle 4 and the ring element 10n to the inner cylindrical surface 11 of the valve body 1.
- US 3,703,184 discloses a sealing means for fuel injection valves comprising a cylindrical guide sleeve that guides a valve needle in fluid-tight manner and that has a spherical head cooperating with a support in the valve body for centring the valve needle.
- a shoulder of the valve body supports a first metal ring, that has a radial clearance with respect to the guide sleeve, on which a second metal ring, that is in contact with the guide sleeve with its inner face and has a radial clearance with respect to the valve body, is arranged to allow a sliding movement of the guide sleeve with respect to the valve body in radial direction.
- An elastic packing ring is arranged slightly compressed between the valve body, the second metal ring, the cylindrical part of the guide sleeve and a shoulder of the spherical head of the guide sleeve and thus provides a sealing between the valve body and the guide sleeve in axial and radial direction.
- the sealing element is formed by a sleeve that comprises a hollow cylinder section in hermetic rigid contact with the valve needle and a flange section hermetically connected to the hollow cylinder section, and a first elastic ring that is arranged axially compressed between a sealing seat of the valve body and the flange section to hermetically seal the actuator chamber and the fluid chamber in the first end position of the valve needle, in the second end position of the valve needle and in all positions of the valve needle between these end positions.
- the hollow cylinder section of the sleeve is hermetically sealed to the valve needle by a second elastic ring.
- the first and/or second elastic rings are made of a resilient material, such as rubber.
- the material itself provides the elastic properties to the sealing according to the present invention.
- the first and/or second elastic rings preferably have a circular cross section in an uncompressed state.
- Elastic rings with circular cross sections are available in different sizes and shapes so that employing such elastic rings with circular cross sections is particularly cost effective.
- the sleeve is preferably made of metal. Thereby, the required rigidity of the sealing is provided.
- the sleeve is welded to the valve needle, preferably hermetically.
- the hermetic sealing between the fluid chamber 2 and the actuator chamber 9 is performed by a metallic sleeve and an elastic element.
- the metallic sleeve comprises a hollow cylinder section 10a in hermetic rigid contact with the valve needle 4 and a flange section 10b hermetically connected to the hollow cylinder section 10a.
- the elastic element is a first elastic ring 10c that is axially so compressed arranged between a sealing seat 15 of the valve body 1 and the flange section 10b that a sealing is provided in all positions of the valve needle 4.
- the hollow cylinder section 10a of the sleeve is hermetically sealed to the valve needle 4 by a second elastic ring 10d.
- the hollow cylinder section might be rigidly and hermetically welded to the valve needle 4.
- a metering device for dosing pressurized fluids in particular an injection valve for a fuel injection system in an internal combustion engine, is disclosed in which the hermetic sealing between the fluid chamber for the pressurized fluid to be dosed and the actuator chamber is provided by an elastic element.
- the elastic element is arranged in a compressed manner between a sealing seat of the valve body and a flange section of a metallic sleeve that additionally comprises a hollow cylinder section in hermetic rigid contact with the valve needle.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
- The present invention relates to a metering device for dosing pressurized fluids, in particular an injection valve for a fuel injection system in an internal combustion engine, comprising a valve body with a fluid chamber for the pressurized fluid to be dosed, the fluid chamber terminating with a metering opening, an axially moveable valve needle passing through the fluid chamber, the valve needle having a first end that controls the opening and closing of the metering opening, and a second end that cooperates with an actuator assembly arranged in an actuator chamber and controlling the axial movement of the valve needle to be in a first end position in which the metering opening is closed and in a second end position in which the metering opening is open, and a sealing element hydraulically isolating the actuator chamber and the fluid chamber.
- Such a metering device is disclosed for example in the European
Patent application EP 1 046 809 A2. - In the manufacture of piezoelectric actuator-controlled valves for high-pressure direct injection for gasoline engines, it is essential to provide a hydraulic sealing capable of isolating the space through which the pressurized gasoline travels, i.e. a fluid chamber, from that where the actuator is arranged, i.e. an actuator chamber.
- Fundamental requirements for this sealing element are
- the ability to operate at high pressures of the fluid, exceeding 200 bar, and at its related peaks of pressure and hydraulic ram induced by the opening and closing of the injector needle,
- the guarantee of effectiveness during the whole expected lifetime of the injector, including resistance to breakage, creep, fatigue loading, and the like,
- satisfactory service life of the component in its operating environment, including chemical tolerance to gasoline, resistance to terminal stresses, and the like,
- a minimum number of mechanical parts and a total reliability of the element, and
- minimal material, manufacturing and assembly times and costs.
- In the metering devices described in
EP 1 046 809 A2, one of which is exemplary shown in Fig. 2, thevalve body 1 comprises anactuator chamber 9 and afluid chamber 2 terminating with ametering opening 3, between which chambers the sealing element 101 - 10n is arranged. The axiallymoveable valve needle 4 passes through thefluid chamber 2. Thevalve needle 4 has a first end 5 that controls the opening and closing of themetering opening 3, and asecond end 6 that cooperates with theactuator assembly 7, 8 arranged in theactuator chamber 9 and controlling the axial movement of thevalve needle 4. The actuator assembly comprises apiezo stack 7 and a bottom cap 8. The bottom cap 8 of the actuator assembly is in Hertzian contact with thesecond end 6 of thevalve needle 4, since thesecond end 6 of thevalve needle 4 is biased against the bottom cap 8 by ahelical spring 12, which is axially compressed arranged between aspring seat 14 of thevalve body 1 and anabutting washer 13 fastened to thevalve needle 4. - The sealing element 101 - 10n is formed by a metal bellows 101, an element able to be axially deformed and to guarantee the required separation between the two described volumes, e.g. gasoline in the
fluid chamber 2 and thepiezo stack 7 as part of the actuator assembly outside, i.e. in theactuator chamber 9. The top collar of the metal bellows 101 is attached to awasher 10m that is attached on thevalve needle 4 and the bottom collar of the metal bellows 101 is attached to aring element 10n attached to the innercylindrical surface 11 of thevalve body 1. The metal bellows 101 offers a high mechanical elasticity in the direction of movement of thevalve needle 4, a sufficient resistance to fuel pressures of up to 500 bar, and a high reliability with respect to leakage throughout the required temperature range of -40 °C to +150 °C. However, an injector with such a metal bellows with these dimensions has disadvantages of high component and manufacturing costs, as well as a complex assembly, requiring two hermetic welds to attach the metal bellows to thewasher 10m and to thering element 10n, as well as two hermetic welds to attach thewasher 10m to thevalve needle 4 and thering element 10n to the innercylindrical surface 11 of thevalve body 1. - US 3,703,184 discloses a sealing means for fuel injection valves comprising a cylindrical guide sleeve that guides a valve needle in fluid-tight manner and that has a spherical head cooperating with a support in the valve body for centring the valve needle. A shoulder of the valve body supports a first metal ring, that has a radial clearance with respect to the guide sleeve, on which a second metal ring, that is in contact with the guide sleeve with its inner face and has a radial clearance with respect to the valve body, is arranged to allow a sliding movement of the guide sleeve with respect to the valve body in radial direction. An elastic packing ring is arranged slightly compressed between the valve body, the second metal ring, the cylindrical part of the guide sleeve and a shoulder of the spherical head of the guide sleeve and thus provides a sealing between the valve body and the guide sleeve in axial and radial direction.
- In view of the foregoing, it is the object underlying the present invention to provide a metering device of the above-mentioned type which is easier and more economic to manufacture, while still fulfilling the requirements specified above.
- This object is achieved by a metering device with the features of appended
claims - Advantageous embodiments of the metering device according to the present invention are disclosed in the respective following dependent claims.
- According to a first aspect of the invention, in a metering device with the features of the preamble of
claim 1, the sealing element is formed by a sleeve that comprises a hollow cylinder section in hermetic rigid contact with the valve needle and a flange section hermetically connected to the hollow cylinder section, and a first elastic ring that is arranged axially compressed between a sealing seat of the valve body and the flange section to hermetically seal the actuator chamber and the fluid chamber in the first end position of the valve needle, in the second end position of the valve needle and in all positions of the valve needle between these end positions. The hollow cylinder section of the sleeve is hermetically sealed to the valve needle by a second elastic ring. Thereby, a secure sealing is provided. Thus, a different sealing from the metal bellows sealing according to prior art is employed, thereby providing additional liberty in the design of the device so that different requirements may be individually fulfilled. - In the metering device according to the present invention, alternatively or additionally preferably the first and/or second elastic rings are made of a resilient material, such as rubber. Thus, the material itself provides the elastic properties to the sealing according to the present invention.
- The first and/or second elastic rings preferably have a circular cross section in an uncompressed state. Elastic rings with circular cross sections are available in different sizes and shapes so that employing such elastic rings with circular cross sections is particularly cost effective.
- The sleeve is preferably made of metal. Thereby, the required rigidity of the sealing is provided.
- In a second aspect of the invention, in a metering device with the features of the preamble of
claim 2, the sleeve is welded to the valve needle, preferably hermetically. - The invention, both its construction and its method of operation together with additional objects and advantages thereof, will be best understood from the following description of a specific exemplary embodiment thereof taken in conjunction with the accompanying drawings, wherein
- Fig. 1
- is a schematic axial cross section of a part of an injection valve according to the present invention; and
- Fig. 2
- is a schematic axial cross section of an injection valve according to the prior art.
- In the following description of an exemplary embodiment according to the present invention the same reference signs as those shown in Fig. 2 denote the same or equal parts that have basically the same functionality. These parts might have a slightly different arrangement in respect to each other than that shown in Fig. 2, but nevertheless have the same functionality as is apparent to the skilled person. Therefore, a detailed description of those parts is omitted here and only the differences of the metering device according to the present invention are described in detail.
- According to the present invention, as shown in Fig. 1, the hermetic sealing between the
fluid chamber 2 and theactuator chamber 9 is performed by a metallic sleeve and an elastic element. The metallic sleeve comprises ahollow cylinder section 10a in hermetic rigid contact with thevalve needle 4 and aflange section 10b hermetically connected to thehollow cylinder section 10a. The elastic element is a firstelastic ring 10c that is axially so compressed arranged between a sealingseat 15 of thevalve body 1 and theflange section 10b that a sealing is provided in all positions of thevalve needle 4. Such an embodiment easily resists against peaks of pressure until 20% of the nominal value of the fluid pressure of 200 bar. Thehollow cylinder section 10a of the sleeve is hermetically sealed to thevalve needle 4 by a secondelastic ring 10d. Alternatively, the hollow cylinder section might be rigidly and hermetically welded to thevalve needle 4. - A metering device for dosing pressurized fluids, in particular an injection valve for a fuel injection system in an internal combustion engine, is disclosed in which the hermetic sealing between the fluid chamber for the pressurized fluid to be dosed and the actuator chamber is provided by an elastic element. The elastic element is arranged in a compressed manner between a sealing seat of the valve body and a flange section of a metallic sleeve that additionally comprises a hollow cylinder section in hermetic rigid contact with the valve needle.
- The features disclosed in the foregoing description, in the drawings, and in the claims may alone as well as in any possible combination be important for the realisation of the invention.
Claims (5)
- A metering device for dosing pressurized fluids, in particular an injection valve for a fuel injection system in an internal combustion engine, comprising- a valve body (1, 14) comprising a fluid chamber (2) for the pressurized fluid to be dosed, the fluid chamber (2) terminating with a metering opening (3),- an axially moveable valve needle (4) passing through the fluid chamber (2), the valve needle (4) having a first end (5) that controls the opening and closing of the metering opening (3), and a second end (6) that cooperates with an actuator assembly (7, 8) arranged in an actuator chamber (9) and controlling the axial movement of the valve needle (4) to be in a first end position in which the metering opening (3) is closed and in a second end position in which the metering opening (3) is open, and- a sealing element (10a - 10d) that hydraulically isolates the actuator chamber (9) and the fluid chamber (2) and that is formed bycharacterized in that- a sleeve (10a, 10b) that comprises a hollow cylinder section (10a) in hermetic rigid contact with the valve needle (4) and a flange section (10b) hermetically connected to the hollow cylinder section (10a), and- a first elastic ring (10c) that is arranged axially compressed between a sealing seat (15) of the valve body (1) and the flange section (10b) to hermetically seal the actuator chamber (9) and the fluid chamber (2) in the first end position of the valve needle (4), in the second end position of the valve needle (4) and in all positions of the valve needle (4) between these end positions,
the hollow cylinder section (10a) of the sleeve (10a, 10b) is hermetically sealed to the valve needle by a second elastic ring (10d). - A metering device for dosing pressurized fluids, in particular an injection valve for a fuel injection system in an internal combustion engine, comprising- a valve body (1, 14) comprising a fluid chamber (2) for the pressurized fluid to be dosed, the fluid chamber (2) terminating with a metering opening (3),- an axially moveable valve needle (4) passing through the fluid chamber (2), the valve needle (4) having a first end (5) that controls the opening and closing of the metering opening (3), and a second end (6) that cooperates with an actuator assembly (7, 8) arranged in an actuator chamber (9) and controlling the axial movement of the valve needle (4) to be in a first end position in which the metering opening (3) is closed and in a second end position in which the metering opening (3) is open, and- a sealing element (10a - 10d) that hydraulically isolates the actuator chamber (9) and the fluid chamber (2) and that is formed bycharacterized in that- a sleeve (10a, 10b) that comprises a hollow cylinder section (10a) in hermetic rigid contact with the valve needle (4) and a flange section (10b) hermetically connected to the hollow cylinder section (10a), and- a first elastic ring (10c) that is arranged axially compressed between a sealing seat (15) of the valve body (1) and the flange section (10b) to hermetically seal the actuator chamber (9) and the fluid chamber (2) in the first end position of the valve needle (4), in the second end position of the valve needle (4) and in all positions of the valve needle (4) between these end positions,
the sleeve (10a, 10b) is welded to the valve needle (4). - The metering device according to claim 1 or 2,
characterized in that
the first and/or second elastic rings (10c, 10d) are made of a resilient material, such as rubber. - The metering device according to anyone of claims 1 to 3,
characterized in that
the first and/or second elastic rings (10c, 10d) have a circular cross section in an uncompressed state. - The metering device according to anyone of claims 1 to 4,
characterized in that
the sleeve (10a, 10b) is made of metal.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003604816 DE60304816T2 (en) | 2003-02-04 | 2003-02-04 | Dosing device with dynamic seal |
EP20030002402 EP1445480B1 (en) | 2003-02-04 | 2003-02-04 | Metering device with dynamic sealing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20030002402 EP1445480B1 (en) | 2003-02-04 | 2003-02-04 | Metering device with dynamic sealing |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1445480A1 EP1445480A1 (en) | 2004-08-11 |
EP1445480B1 true EP1445480B1 (en) | 2006-04-26 |
Family
ID=32605315
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20030002402 Expired - Lifetime EP1445480B1 (en) | 2003-02-04 | 2003-02-04 | Metering device with dynamic sealing |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1445480B1 (en) |
DE (1) | DE60304816T2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1808596A1 (en) * | 2006-01-12 | 2007-07-18 | Siemens Aktiengesellschaft | Valve assembly for an injection valve and injection valve |
DE102006050165A1 (en) * | 2006-10-25 | 2008-04-30 | Robert Bosch Gmbh | Actuator with fluid insulation |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2032005A1 (en) * | 1970-06-29 | 1972-01-05 | Robert Bosch Gmbh, 7000 Stuttgart | Fuel injector |
DE3009461C2 (en) * | 1980-03-12 | 1994-02-10 | Daimler Benz Ag | Fuel injection nozzle for an internal combustion engine |
DE50010902D1 (en) | 1999-04-20 | 2005-09-15 | Siemens Ag | fluid metering |
DE19956830C2 (en) * | 1999-11-25 | 2002-07-18 | Siemens Ag | execution |
-
2003
- 2003-02-04 DE DE2003604816 patent/DE60304816T2/en not_active Expired - Lifetime
- 2003-02-04 EP EP20030002402 patent/EP1445480B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP1445480A1 (en) | 2004-08-11 |
DE60304816T2 (en) | 2006-11-02 |
DE60304816D1 (en) | 2006-06-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5185979B2 (en) | Valve stem seal | |
US20090008592A1 (en) | Fuel injection valve | |
US7044407B2 (en) | Fluid dosing device with a throttle point | |
US6779496B2 (en) | Pressure reservoir for exerting pressure on a hydraulic system, with which preferably a gas exchange valve of an internal combustion engine is actuated | |
US6948667B2 (en) | Fuel injector | |
KR20050021538A (en) | Piezoelectirc actuator module and method for assembling a piezoelectric actuator module | |
JP4568772B2 (en) | Fluid operated valve assembly | |
US7195182B2 (en) | Dosing device for fluids, especially a motor vehicle injection valve | |
CN1211575C (en) | Fuel injection valve | |
EP1445480B1 (en) | Metering device with dynamic sealing | |
CN105275668B (en) | Injector, in particular for the injection of gaseous fuels | |
EP1445473B1 (en) | Metering device with dynamic sealing | |
US6637677B1 (en) | Fuel injector | |
JP4163962B2 (en) | Piezoelectric actuator module | |
US6425376B1 (en) | Fuel injector | |
KR100935810B1 (en) | Fuel injection valve | |
EP1391609B1 (en) | Metering device with hydraulic bushing element | |
EP1445472B1 (en) | Metering device with dynamic sealing | |
US7422006B2 (en) | Fuel injector | |
US20040046060A1 (en) | Fuel injection valve | |
EP1445478B1 (en) | Sealing element and valve needle for use in a metering device | |
EP1391608B1 (en) | Metering device with thermal compensator unit | |
EP3816431B1 (en) | Fluid injector for an internal combustion engine comprising a pressure compensator element | |
EP2067981B1 (en) | Valve assembly for an injection valve and injection valve | |
US20060214021A1 (en) | Hydraulic coupler and fuel injection valve |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
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 IT LI LU MC NL PT SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO |
|
17P | Request for examination filed |
Effective date: 20050210 |
|
AKX | Designation fees paid |
Designated state(s): DE FR IT |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR IT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20060426 |
|
REF | Corresponds to: |
Ref document number: 60304816 Country of ref document: DE Date of ref document: 20060601 Kind code of ref document: P |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20070129 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: CD |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20120227 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20120229 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20120221 Year of fee payment: 10 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20131031 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 60304816 Country of ref document: DE Effective date: 20130903 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130204 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130903 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130228 |