EP2378106A1 - Valve assembly for an injection valve and injection valve - Google Patents

Valve assembly for an injection valve and injection valve Download PDF

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Publication number
EP2378106A1
EP2378106A1 EP10003908A EP10003908A EP2378106A1 EP 2378106 A1 EP2378106 A1 EP 2378106A1 EP 10003908 A EP10003908 A EP 10003908A EP 10003908 A EP10003908 A EP 10003908A EP 2378106 A1 EP2378106 A1 EP 2378106A1
Authority
EP
European Patent Office
Prior art keywords
valve
valve body
armature
outlet portion
fluid outlet
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Withdrawn
Application number
EP10003908A
Other languages
German (de)
French (fr)
Inventor
Ileana Romeo
Matteo Soriani
Francesco Lenzi
Mauro Grandi
Matteo Buonfiglioli
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
Continental Automotive 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
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Priority to EP10003908A priority Critical patent/EP2378106A1/en
Publication of EP2378106A1 publication Critical patent/EP2378106A1/en
Withdrawn legal-status Critical Current

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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
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic 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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/166—Selection of particular materials
    • 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
    • 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
    • F02M2200/02—Fuel-injection apparatus having means for reducing wear
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9038—Coatings

Definitions

  • Valve assembly for an injection valve and injection valve
  • the invention relates to a valve assembly for an injection valve and an injection valve.
  • Injection valves are in wide spread use, in particular for internal combustion engines where they may be arranged in order to dose the fluid into an intake manifold of the internal combustion engine or directly into the combustion chamber of a cylinder of the internal combustion engine.
  • injection valves are manufactured in various forms in order to satisfy the various needs for the various combustion engines. Therefore, for example, their length, their diameter and also various elements of the injection valve being responsible for the way the fluid is dosed may vary in a wide range.
  • injection valves may accommodate an actuator for actuating a needle of the injection valve, which may, for example, be an electromagnetic actuator or piezo electric actuator.
  • the respective injection valve may be suited to dose fluids under very high pressures.
  • the pressures may be in case of a gasoline engine, for example, in the range of up to 200 bar and in the case of diesel engines in the range of up to 2000 bar.
  • the object of the invention is to create a valve assembly for an injection valve and injection valve which facilitates a reliable and precise function.
  • a valve assembly for an injection valve comprising a valve body including a central longitudinal axis, the valve body comprising a cavity with a fluid inlet portion and a fluid outlet portion, a valve needle axially movable in the cavity, the valve needle preventing a fluid flow through the fluid outlet portion in a closing position and releasing the fluid flow through the fluid outlet portion in further positions, and an electro-magnetic actuator unit being designed to actuate the valve needle.
  • the electro-magnetic actuator unit comprises an armature axially movable in the cavity.
  • the valve body has a stop surface facing the fluid outlet portion and facing the armature.
  • the stop surface is designed to act as a stop for the armature in its position furthest away from the fluid outlet portion.
  • the stop surface is a plasma nitrided surface.
  • the application of the plasma nitriding process on surfaces enables a hardening oh these surfaces. Therefore, deformations and surface roughness of the stop surface of the valve body can be prevented and wearing effects between the stop surface of the valve body and the armature can be kept small. This can result in a good dynamic performance of the injection valve and the drift of the static fluid flow can be kept small. By this a very good long-term durability performance of the injection valve can be obtained.
  • the valve assembly comprises a valve shell being arranged radially outside the valve body.
  • the valve body has an outer surface facing the valve shell.
  • the outer surface of the valve body is a plasma nitrided surface. This has the advantage that due to the plasma nitrided outer surface wearing effects between the valve body and the valve shell can be kept small. A low friction coefficient in sliding areas between the valve shell and the valve body is possible. Additionally, the outer surface of the valve body facing the valve shell may be plasma nitrided in one step together with the stop surface.
  • the invention is distinguished by an injection valve with a valve assembly according to the first aspect of the invention.
  • An injection valve 10 that is in particular suitable for dosing fuel to an internal combustion engine comprises in particular a valve assembly 11.
  • the valve assembly 11 comprises a valve body 12 with a central longitudinal axis L.
  • the valve body 12 comprises a lower part 12a and an inlet tube 14.
  • the valve assembly 11 further comprises a valve shell 15 which is arranged radially outside the lower part 12a of the valve body 12 and the inlet tube 14.
  • the valve shell 15 enables a mechanical coupling between the lower part 12a of the valve body 12 and the inlet tube 14.
  • a housing 16 is partially arranged around the valve body 12.
  • a cavity 18 is arranged in the valve body 12.
  • the cavity 18 takes in a valve needle 20 and an armature 22.
  • the armature 22 is axially movable in the cavity 18.
  • the armature 22 is decoupled from the valve needle 20 in axial direction.
  • the armature 22 has an upper guide 23 formed as a collar around the valve needle 20.
  • a main spring 24 is arranged in a recess 26 provided in the inlet tube 14.
  • the main spring 24 is mechanically coupled to the upper guide 23.
  • the upper guide 23 is fixedly coupled to the valve needle 20.
  • the upper guide 23 is in contact with an inner surface of the inlet tube 14 and can guide the valve needle 20 in axial direction inside the inlet tube 14.
  • a filter element 30 is arranged in the inlet tube 14 and forms a further seat for the main spring 24.
  • the filter element 30 can be axially moved in the inlet tube 14 in order to preload the main spring 24 in a desired manner.
  • the main spring 24 exerts a force on the valve needle 20 towards an injection nozzle 34 of the injection valve 10.
  • the injection nozzle 34 may be, for example, an injection hole. However, it may also be of some other type suitable for dosing fluid.
  • the valve assembly 11 is provided with an actuator unit 36 that is preferably an electro-magnetic actuator.
  • the electromagnetic actuator unit 36 comprises a coil 38, which is preferably arranged inside the housing 16. Furthermore, the electro-magnetic actuator unit 36 comprises the armature 22.
  • the housing 16, the inlet tube 14, the lower part 12a of the valve body 12 and the armature 22 are forming an electromagnetic circuit.
  • the cavity 18 comprises a fluid outlet portion 40 which is arranged near the seat plate 32.
  • the fluid outlet portion 40 communicates with a fluid inlet portion 42 which is provided in the valve body 12, in particular in the inlet tube 14.
  • a step 44 is arranged in the valve body 12.
  • An armature spring 46 which is preferably a coil spring is fixedly coupled to the step 44 in the valve body 12.
  • the step 44 and the armature spring 46 form a stop element for the armature 22.
  • the valve body 12 has a stop surface 48 which faces the fluid outlet portion 40 and the armature 22.
  • the stop surface 48 can act as a stop for the armature 22 when the armature 22 is in a position which is furthest away from the fluid outlet portion 40.
  • the stop surface 48 is a plasma nitrided surface. The plasma nitriding of the stop surface 48 is represented by the dashed line Dl of Figure 2 .
  • valve body 12 has an outer surface 50.
  • the outer surface 50 is a cylindrical surface.
  • the outer surface 50 faces the valve shell 15.
  • the outer surface 50 of the valve body 12 is a plasma nitrided surface.
  • the plasma nitriding of the surface 50 is represented by the dashed lines D2 of Figure 2 .
  • the valve needle 20 prevents a fluid flow through the fluid outlet portion 40 in the valve body 12 in a closing position of the valve needle 20. Outside of the closing position of the valve needle 20, the valve needle 20 enables the fluid flow through the fluid outlet portion 40.
  • the actuator unit 36 may effect a electro-magnetic force on the armature 22.
  • the armature 22 is attracted by the electro-magnetic actuator unit 36 with the coil 38 and moves in axial direction away from the fluid outlet portion 40. Consequently, the armature 22 comes into contact with the stop surface 48 of the valve body 12 and the movement of the armature 22 is stopped by the stop surface 48.
  • the armature 22 takes the valve needle 20 with it so that the valve needle 20 moves in axial direction out of the closing position. Outside of the closing position of the valve needle 20 the gap between the valve body 12 and the valve needle 20 at the axial end of the injection valve 10 facing away from of the actuator unit 36 forms a fluid path and fluid can pass through the injection nozzle 34.
  • the main spring 24 can force the valve needle 20 to move in axial direction in its closing position. It is depending on the force balance between the force on the valve needle 20 caused by the actuator unit 36 with the coil 38 and the force on the valve needle 20 caused by the main spring 24 whether the valve needle 20 is in its closing position or not.
  • the movement of the armature 22 results in an impact of the armature 22 on the valve body 12.
  • the stop surface 48 of the valve body 12 forms an impact section relative for the armature 22 when the armature 22 is furthest away from the fluid outlet portion 40.

Abstract

The invention concerns a valve assembly (11) for an injection valve (10), comprising a valve body (12) including a central longitudinal axis (L), the valve body (12) comprising a cavity (18) with a fluid inlet portion (42) and a fluid outlet portion (40), a valve needle (20) axially movable in the cavity (18), the valve needle (20) preventing a fluid flow through the fluid outlet portion (40) in a closing position and releasing the fluid flow through the fluid outlet portion (40) in further positions, and an electro-magnetic actuator unit (36) being designed to actuate the valve needle (20), the electro-magnetic actuator unit (36) comprising an armature (22) axially movable in the cavity (18). The valve body (12) has a stop surface (48) facing the fluid outlet portion (40) and facing the armature (22). The stop surface (48) is designed to act as a stop for the armature (22) in its position furthest away from the fluid outlet portion (40). The stop surface (48) is a plasma nitrided surface.

Description

  • Valve assembly for an injection valve and injection valve
  • The invention relates to a valve assembly for an injection valve and an injection valve.
  • Injection valves are in wide spread use, in particular for internal combustion engines where they may be arranged in order to dose the fluid into an intake manifold of the internal combustion engine or directly into the combustion chamber of a cylinder of the internal combustion engine.
  • Injection valves are manufactured in various forms in order to satisfy the various needs for the various combustion engines. Therefore, for example, their length, their diameter and also various elements of the injection valve being responsible for the way the fluid is dosed may vary in a wide range. In addition to that, injection valves may accommodate an actuator for actuating a needle of the injection valve, which may, for example, be an electromagnetic actuator or piezo electric actuator.
  • In order to enhance the combustion process in view of the creation of unwanted emissions, the respective injection valve may be suited to dose fluids under very high pressures. The pressures may be in case of a gasoline engine, for example, in the range of up to 200 bar and in the case of diesel engines in the range of up to 2000 bar.
  • The object of the invention is to create a valve assembly for an injection valve and injection valve which facilitates a reliable and precise function.
  • These objects are achieved by the features of the independent claims. Advantageous embodiments of the invention are given in the sub-claims.
  • According to a first aspect the invention is distinguished by a valve assembly for an injection valve, comprising a valve body including a central longitudinal axis, the valve body comprising a cavity with a fluid inlet portion and a fluid outlet portion, a valve needle axially movable in the cavity, the valve needle preventing a fluid flow through the fluid outlet portion in a closing position and releasing the fluid flow through the fluid outlet portion in further positions, and an electro-magnetic actuator unit being designed to actuate the valve needle. The electro-magnetic actuator unit comprises an armature axially movable in the cavity. The valve body has a stop surface facing the fluid outlet portion and facing the armature. The stop surface is designed to act as a stop for the armature in its position furthest away from the fluid outlet portion. The stop surface is a plasma nitrided surface.
  • The application of the plasma nitriding process on surfaces enables a hardening oh these surfaces. Therefore, deformations and surface roughness of the stop surface of the valve body can be prevented and wearing effects between the stop surface of the valve body and the armature can be kept small. This can result in a good dynamic performance of the injection valve and the drift of the static fluid flow can be kept small. By this a very good long-term durability performance of the injection valve can be obtained.
  • In an advantageous embodiment the valve assembly comprises a valve shell being arranged radially outside the valve body. The valve body has an outer surface facing the valve shell. The outer surface of the valve body is a plasma nitrided surface. This has the advantage that due to the plasma nitrided outer surface wearing effects between the valve body and the valve shell can be kept small. A low friction coefficient in sliding areas between the valve shell and the valve body is possible. Additionally, the outer surface of the valve body facing the valve shell may be plasma nitrided in one step together with the stop surface.
  • According to a second aspect the invention is distinguished by an injection valve with a valve assembly according to the first aspect of the invention.
  • Exemplary embodiments of the invention are explained in the following with the aid of schematic drawings. These are as follows:
    • Figure 1, an injection valve with a valve assembly in a longitudinal section view, and
    • Figure 2, an enlarged view of a section of the valve assembly.
  • Elements of the same design and function that appear in different illustrations are identified by the same reference character.
  • An injection valve 10 that is in particular suitable for dosing fuel to an internal combustion engine comprises in particular a valve assembly 11.
  • The valve assembly 11 comprises a valve body 12 with a central longitudinal axis L. The valve body 12 comprises a lower part 12a and an inlet tube 14. The valve assembly 11 further comprises a valve shell 15 which is arranged radially outside the lower part 12a of the valve body 12 and the inlet tube 14. The valve shell 15 enables a mechanical coupling between the lower part 12a of the valve body 12 and the inlet tube 14. A housing 16 is partially arranged around the valve body 12. A cavity 18 is arranged in the valve body 12.
  • The cavity 18 takes in a valve needle 20 and an armature 22. The armature 22 is axially movable in the cavity 18. The armature 22 is decoupled from the valve needle 20 in axial direction. The armature 22 has an upper guide 23 formed as a collar around the valve needle 20. A main spring 24 is arranged in a recess 26 provided in the inlet tube 14. The main spring 24 is mechanically coupled to the upper guide 23. The upper guide 23 is fixedly coupled to the valve needle 20. The upper guide 23 is in contact with an inner surface of the inlet tube 14 and can guide the valve needle 20 in axial direction inside the inlet tube 14.
  • A filter element 30 is arranged in the inlet tube 14 and forms a further seat for the main spring 24. During the manufacturing process of the injection valve 10 the filter element 30 can be axially moved in the inlet tube 14 in order to preload the main spring 24 in a desired manner. By this the main spring 24 exerts a force on the valve needle 20 towards an injection nozzle 34 of the injection valve 10.
  • In a closing position of the valve needle 20 it sealingly rests on a seat plate 32 by this preventing a fluid flow through the at least one injection nozzle 34. The injection nozzle 34 may be, for example, an injection hole. However, it may also be of some other type suitable for dosing fluid.
  • The valve assembly 11 is provided with an actuator unit 36 that is preferably an electro-magnetic actuator. The electromagnetic actuator unit 36 comprises a coil 38, which is preferably arranged inside the housing 16. Furthermore, the electro-magnetic actuator unit 36 comprises the armature 22. The housing 16, the inlet tube 14, the lower part 12a of the valve body 12 and the armature 22 are forming an electromagnetic circuit.
  • The cavity 18 comprises a fluid outlet portion 40 which is arranged near the seat plate 32. The fluid outlet portion 40 communicates with a fluid inlet portion 42 which is provided in the valve body 12, in particular in the inlet tube 14.
  • A step 44 is arranged in the valve body 12. An armature spring 46 which is preferably a coil spring is fixedly coupled to the step 44 in the valve body 12. The step 44 and the armature spring 46 form a stop element for the armature 22.
  • The valve body 12 has a stop surface 48 which faces the fluid outlet portion 40 and the armature 22. The stop surface 48 can act as a stop for the armature 22 when the armature 22 is in a position which is furthest away from the fluid outlet portion 40. The stop surface 48 is a plasma nitrided surface. The plasma nitriding of the stop surface 48 is represented by the dashed line Dl of Figure 2.
  • Furthermore, the valve body 12 has an outer surface 50. Preferably, the outer surface 50 is a cylindrical surface. The outer surface 50 faces the valve shell 15. The outer surface 50 of the valve body 12 is a plasma nitrided surface. The plasma nitriding of the surface 50 is represented by the dashed lines D2 of Figure 2.
  • In the following, the function of the injection valve 10 is described in detail:
    • The fluid is led from the fluid inlet portion 42 towards the fluid outlet portion 40.
  • The valve needle 20 prevents a fluid flow through the fluid outlet portion 40 in the valve body 12 in a closing position of the valve needle 20. Outside of the closing position of the valve needle 20, the valve needle 20 enables the fluid flow through the fluid outlet portion 40.
  • In the case when the electro-magnetic actuator unit 36 with the coil 38 gets energized the actuator unit 36 may effect a electro-magnetic force on the armature 22. The armature 22 is attracted by the electro-magnetic actuator unit 36 with the coil 38 and moves in axial direction away from the fluid outlet portion 40. Consequently, the armature 22 comes into contact with the stop surface 48 of the valve body 12 and the movement of the armature 22 is stopped by the stop surface 48. The armature 22 takes the valve needle 20 with it so that the valve needle 20 moves in axial direction out of the closing position. Outside of the closing position of the valve needle 20 the gap between the valve body 12 and the valve needle 20 at the axial end of the injection valve 10 facing away from of the actuator unit 36 forms a fluid path and fluid can pass through the injection nozzle 34.
  • In the case when the actuator unit 36 is de-energized the main spring 24 can force the valve needle 20 to move in axial direction in its closing position. It is depending on the force balance between the force on the valve needle 20 caused by the actuator unit 36 with the coil 38 and the force on the valve needle 20 caused by the main spring 24 whether the valve needle 20 is in its closing position or not.
  • The movement of the armature 22 results in an impact of the armature 22 on the valve body 12. In particular, the stop surface 48 of the valve body 12 forms an impact section relative for the armature 22 when the armature 22 is furthest away from the fluid outlet portion 40. By plasma nitriding the stop surface 48 of the valve body 12, good wearing characteristics of the stop surface 48 of the valve body 12 can be obtained. Consequently, the wearing between the armature 22 and the valve body 12 can be kept small when the armature 22 impacts on the stop surface 48 of the valve body 12. Furthermore, due to the plasma nitriding of the outer surface 50 the friction coefficient between the valve body 12 and the valve shell 15 is very low.
  • Due to the plasma nitriding of the surfaces 48, 50 leakage failures of the injection valve 10 can be kept low and a high lifetime of the injection valve 10 is possible.

Claims (3)

  1. Valve assembly (11) for an injection valve (10), comprising
    - a valve body (12) including a central longitudinal axis (L), the valve body (12) comprising a cavity (18) with a fluid inlet portion (42) and a fluid outlet portion (40),
    - a valve needle (20) axially movable in the cavity (18), the valve needle (20) preventing a fluid flow through the fluid outlet portion (40) in a closing position and releasing the fluid flow through the fluid outlet portion (40) in further positions, and
    - an electro-magnetic actuator unit (36) being designed to actuate the valve needle (20), the electro-magnetic actuator unit (36) comprising an armature (22) axially movable in the cavity (18),
    wherein the valve body (12) has a stop surface (48) facing the fluid outlet portion (40) and facing the armature (22), the stop surface (48) being designed to act as a stop for the armature (22) in its position furthest away from the fluid outlet portion (40), and
    wherein the stop surface (48) is a plasma nitrided surface.
  2. Valve assembly (11) according to claim 1, wherein the valve assembly (11) comprises a valve shell (15) being arranged radially outside the valve body (12), the valve body (12) has an outer surface (50) facing the valve shell (15), and the outer surface (50) of the valve body (12) is a plasma nitrided surface.
  3. Injection valve (10) with a valve assembly (11) according to one of the preceding claims.
EP10003908A 2010-04-13 2010-04-13 Valve assembly for an injection valve and injection valve Withdrawn EP2378106A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10003908A EP2378106A1 (en) 2010-04-13 2010-04-13 Valve assembly for an injection valve and injection valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10003908A EP2378106A1 (en) 2010-04-13 2010-04-13 Valve assembly for an injection valve and injection valve

Publications (1)

Publication Number Publication Date
EP2378106A1 true EP2378106A1 (en) 2011-10-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP10003908A Withdrawn EP2378106A1 (en) 2010-04-13 2010-04-13 Valve assembly for an injection valve and injection valve

Country Status (1)

Country Link
EP (1) EP2378106A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2602476A1 (en) 2011-12-07 2013-06-12 Continental Automotive GmbH Valve assembly means for an injection valve and injection valve
WO2015110199A1 (en) * 2014-01-22 2015-07-30 Robert Bosch Gmbh Method for producing a magnetic valve
EP3153697A1 (en) 2015-10-09 2017-04-12 Continental Automotive GmbH Valve assembly arrangement for an injection valve and injection valve
DE102017218267A1 (en) 2017-10-12 2019-04-18 Continental Automotive Gmbh Fluid valve and method for controlling the supply of fluid

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4421947A1 (en) * 1993-12-09 1995-06-14 Bosch Gmbh Robert Electromagnetically actuated valve
JP2003328894A (en) * 2002-05-13 2003-11-19 Hitachi Unisia Automotive Ltd Fuel injection valve
DE102008000559A1 (en) * 2007-03-23 2008-09-25 Denso Corp., Kariya Fuel-injection valve has nozzle section with nozzle body and a needle, which is held in lubricating manner in nozzle body, and nozzle body has fuel-injector orifice, which is injected by fuel in combustion chamber
DE102008053310A1 (en) * 2008-10-27 2010-04-29 Vacuumschmelze Gmbh & Co. Kg Soft-magnetic workpiece with wear-resistant layer, used to make fuel injection- or solenoid valve, includes core of crystalline iron-cobalt alloy

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4421947A1 (en) * 1993-12-09 1995-06-14 Bosch Gmbh Robert Electromagnetically actuated valve
JP2003328894A (en) * 2002-05-13 2003-11-19 Hitachi Unisia Automotive Ltd Fuel injection valve
DE102008000559A1 (en) * 2007-03-23 2008-09-25 Denso Corp., Kariya Fuel-injection valve has nozzle section with nozzle body and a needle, which is held in lubricating manner in nozzle body, and nozzle body has fuel-injector orifice, which is injected by fuel in combustion chamber
DE102008053310A1 (en) * 2008-10-27 2010-04-29 Vacuumschmelze Gmbh & Co. Kg Soft-magnetic workpiece with wear-resistant layer, used to make fuel injection- or solenoid valve, includes core of crystalline iron-cobalt alloy

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2602476A1 (en) 2011-12-07 2013-06-12 Continental Automotive GmbH Valve assembly means for an injection valve and injection valve
WO2013083626A1 (en) 2011-12-07 2013-06-13 Continental Automotive Gmbh Valve assembly arrangement for an injection valve and injection valve
US10094348B2 (en) 2011-12-07 2018-10-09 Continental Automotive Gmbh Valve assembly arrangement for an injection valve and injection valve
WO2015110199A1 (en) * 2014-01-22 2015-07-30 Robert Bosch Gmbh Method for producing a magnetic valve
EP3153697A1 (en) 2015-10-09 2017-04-12 Continental Automotive GmbH Valve assembly arrangement for an injection valve and injection valve
DE102017218267A1 (en) 2017-10-12 2019-04-18 Continental Automotive Gmbh Fluid valve and method for controlling the supply of fluid
WO2019072793A1 (en) 2017-10-12 2019-04-18 Continental Automotive Gmbh Fluid valve and method for controlling the supply of fluid
DE102017218267B4 (en) 2017-10-12 2019-05-02 Continental Automotive Gmbh Fluid valve and method for controlling the supply of fluid

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