CN112282994A - Valve for metering fluids - Google Patents

Valve for metering fluids Download PDF

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Publication number
CN112282994A
CN112282994A CN202010715923.0A CN202010715923A CN112282994A CN 112282994 A CN112282994 A CN 112282994A CN 202010715923 A CN202010715923 A CN 202010715923A CN 112282994 A CN112282994 A CN 112282994A
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CN
China
Prior art keywords
armature
valve
stop element
valve needle
spring
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.)
Pending
Application number
CN202010715923.0A
Other languages
Chinese (zh)
Inventor
J·格拉纳
K·加尔滕
M·米勒
S·塞尔尼
J·珀尔曼
P·劳申贝格尔
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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of CN112282994A publication Critical patent/CN112282994A/en
Pending 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
    • 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
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • 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
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0685—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature and the valve being allowed to move relatively to each other or not being attached to each other
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/008—Arrangement of fuel passages inside of injectors
    • 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
    • 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
    • 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Magnetically Actuated Valves (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The invention relates to a valve for metering fluids, in particular a fuel injection valve for an internal combustion engine, having an armature of an electromagnetic actuator and a valve needle which can be actuated by the armature and which serves for actuating a valve closing body which, together with a valve seat surface, forms a sealing seat, wherein the armature is guided movably on the valve needle, wherein at least one stop element which is arranged in a stationary manner on the valve needle is provided and which limits a relative movement between the armature and the valve needle in connection with the actuation of the valve needle, wherein at least one armature free-travel spring is provided which is supported at one side at least indirectly on the armature and at the other side at least indirectly on the stop element and which surrounds the valve needle. It is proposed that the stop element has a spring receptacle into which the armature free travel spring is at least partially inserted.

Description

Valve for metering fluids
Technical Field
The invention relates to a valve for metering a fluid, in particular a fuel injection valve for an internal combustion engine. The invention relates in particular to the field of injectors for fuel injection systems of motor vehicles, in which fuel is preferably injected directly into the combustion chamber of an internal combustion engine.
Background
DE 102016225776 a1 discloses a fuel injection valve for a fuel injection system of an internal combustion engine. A known fuel injection valve comprises a valve needle, which interacts with a valve seat surface to form a sealing seat, and an armature arranged on the valve needle, which is acted upon by a return spring in the closing direction and interacts with an electromagnetic coil. The armature is mounted on the valve needle so as to be movable between two stop elements. The armature has a spring receptacle which is open toward one of the stop elements and into which the armature free-stroke spring is inserted. The armature free travel spring is supported on one side on a spring support surface of the armature, which spring support surface forms the base of the spring receptacle, and on the other side on a stop surface of the armature. The kidney-shaped through opening of the armature intersects the spring receptacle, so that fuel can flow through both the spring receptacle and the through opening.
Disclosure of Invention
According to the invention, a valve for metering fluids, in particular a fuel injection valve for an internal combustion engine, having an armature of an electromagnetic actuator and a valve needle which can be actuated by the armature and which serves for actuating a valve closing body which, in cooperation with a valve seat surface, forms a sealing seat, wherein the armature is guided movably on the valve needle, wherein at least one stop element which is arranged in a stationary manner on the valve needle is provided and which limits a relative movement between the armature and the valve needle in dependence on the actuation of the valve needle, wherein at least one armature free-travel spring is provided which is supported at least indirectly on the armature on one side and at least indirectly on the stop element on the other side and which surrounds the valve needle, wherein the stop element has a spring receptacle, the armature free travel spring is at least partially inserted into the spring receptacle.
The valve for dosing a fluid according to the invention has the following advantages: improved configuration and operation can be achieved. Furthermore, the manufacturing can be simplified and a lower cost manufacturing can be achieved.
In valves for metering fluids, the armature (magnet armature) is not fixedly connected to the valve needle, but rather is mounted so as to be movable between stop elements. The stop element can be realized as a stop sleeve, a stop ring or the like. The stop element can optionally also be molded on the valve needle. The armature is adjusted in the rest state by at least one armature free travel spring to a stop fixed in relation to the valve needle position, so that the armature rests there. When the valve is actuated, the entire free travel of the armature is available as an acceleration path.
In addition, the following advantages are obtained with respect to the fixed connection of the armature to the valve needle or with respect to the one-piece needle in the case of a movable arrangement of the armature on the valve needle: the pulse generated by the armature, even with the same magnetic force during opening, can reliably open the valve needle at higher pressures, in particular fuel pressures, which can be referred to as dynamic mechanical intensification, and decoupling of the participating masses is achieved, as a result of which the blocking force caused at the valve seat surface is divided into two pulses.
However, special problems arise in connection with the armature being movably supported on the valve needle. In particular, increased production costs arise in relation to the armature and the armature freewheeling spring or the spring receptacle for the armature freewheeling spring. In conventional designs, the spring receptacle is therefore realized in the form of a groove in the armature, which makes the production of the armature complicated. In particular, when the fuel passing through the armature chamber is guided through the through-opening of the armature which intersects the spring receptacle, the machining of the armature is complicated and costly, since, for example, the intersection needs to be deburred.
The complexity of the armature manufacture is reduced in the proposed configuration compared to the prior art. If necessary, the complex geometry adaptation can involve at least substantially only a stop element into which the armature free-travel spring is inserted. Depending on the configuration of the valve, the disadvantages mentioned can be avoided. In this case, the design of the free-travel spring of the armature can be implemented or predetermined in such a way that important parameters, such as the working travel and the contact pressure, are predetermined in a corresponding manner, so that no additional structural changes are required or can be limited to a minimum. This does not exclude that other adaptations are performed as well. For example, other configurations of the armature free-travel spring and/or armature free-travel springs having modified parameters may also be used.
The complex and costly spring receptacle for receiving the armature free-travel spring can therefore be dispensed with in the armature. Furthermore, the free flow cross section through the armature can be adjusted in a defined manner if necessary.
In particular, an advantageous configuration of the stop element with respect to the spring receptacle can be achieved by the following advantageous further development. The spring receiving portion abuts the valve needle. At least one notch which is open with respect to the surroundings is provided on the stop element and intersects the spring receptacle. The slots are open at least radially and/or at least counter to the flow direction of the fluid. The stop element is guided in a guide bore of an inner pole of the actuator, through which the fluid is guided into the armature chamber during operation and through which a fluid flow can be achieved at least partially via a slot of the stop element. This makes it possible, for example, for the spring receptacle to contain no dead volume. Thereby avoiding undesirable side effects. In particular, it is avoided that the fluid is locally retained in the dead volume of the spring receptacle and deteriorates, which can lead to resinification, for example, in the fuel.
The stop element has a stepped bore, which, as viewed along the longitudinal axis, has a first section which forms the spring receptacle and a second section at which the stop element is connected to the valve needle. On the second section of the stepped bore, a press fit is formed between the stop element and the valve needle. The advantageous embodiment has the following advantages: an advantageous geometric realization of the stop element and an advantageous connection to the valve needle can be achieved.
The armature has an end face facing the stop element, the armature free travel spring is supported on an armature support face of the armature and the armature support face is arranged at the same height as the end face or at least substantially at the height of the end face, as viewed with respect to the longitudinal axis. The armature can thereby be realized particularly simply and therefore cost-effectively.
A stop surface for the armature is formed on the stop element, and the spring receptacle is configured in such a way that the armature free travel spring is radially surrounded by the stop element at least on the stop surface. In this way, a large contact surface between the armature and the stop element can be achieved at the stop.
The manufacturing complexity of the armature can thus be advantageously transferred to the stop element, which is designed as a metal powder injection molded part or as a press-sintered part, which makes possible a low-cost production. If necessary, the stop element can also be produced from a material that is easy to cut. In particular, one of these possibilities makes it possible to avoid the complex geometry of the stop element, which is required if necessary, resulting in significant additional costs due to the internally arranged free-travel spring of the armature.
Drawings
Preferred embodiments of the present invention are explained in detail in the following description with reference to the drawings, in which corresponding elements are provided with consistent reference numerals. The figures show:
FIG. 1 is a valve corresponding to an embodiment of the invention in a partially schematic cross-sectional view, an
Fig. 2 is a schematic perspective view of a part of the valve shown in fig. 1, which corresponds to this exemplary embodiment.
Detailed Description
Fig. 1 shows a valve 1 for metering a fluid, corresponding to an exemplary embodiment of the present invention, of a fuel injection system in a partially schematic sectional view. The valve 1 can be designed in particular as a fuel injection valve 1. A preferred application is a fuel injection system, wherein such a fuel injection valve 1 is designed as a high-pressure injection valve 1 and is used for injecting fuel directly into an associated combustion chamber of an internal combustion engine. Here, liquid fuel is preferably used as the fuel. However, injection or injection of gaseous fuel is also conceivable.
The valve 1 has an actuator 2 comprising a solenoid 3 and an armature 4. By energizing the electromagnetic coil 3, a magnetic field is generated via the inner pole 5, the armature 4 and the at least partially magnetically conductive housing 6. The inner pole 5 is fixedly connected with the shell 6. The valve 1 has a valve needle 8 which is adjustable in the housing 6 along a longitudinal axis 7 and on which a valve closing body 9 is arranged. The valve closing body 9 cooperates with the valve seat surface 10 to form a sealing seat. The valve closing body 9 can also be formed in one piece with the valve needle 8.
The stop elements 11, 12 are arranged on the valve needle 8 and are fixedly connected to the valve needle 8. The armature 4 is movable along the longitudinal axis 7 between the stop elements 11, 12, wherein the armature is guided on an outer circumferential surface 13 of the valve needle 8. In this exemplary embodiment, valve needle 8 is acted upon by a return spring 16 via a stop element 11, which acts upon valve closing body 9 against valve seat surface 10 by means of valve needle 8. Thereby, the holding valve 1 is closed in a stationary state.
In a variant, at least one of the stop elements 11, 12 can also be formed on the valve needle 8. However, the stop element designed in the proposed manner, i.e. the stop element 11 in this exemplary embodiment, is preferably designed as a separate component, which is connected to the valve needle 8. Thereby, lower manufacturing costs can be achieved. The proposed stop element 11 is a stop element 11 which, when actuated, limits the movement of the armature 4 relative to the valve needle 8 in the opening direction 17.
To actuate the valve 1, the solenoid 3 is energized, as a result of which the armature 4 is accelerated in the opening direction 17 along the longitudinal axis 7 against the force of the armature free travel spring 18. In this case, the return spring 16 initially holds the valve needle 8 in its initial position shown in fig. 1. When the armature 4 strikes the stop element 11, i.e. after the armature free travel 19, both the magnetic force and the impact force are transmitted to the valve needle 8, which causes the valve needle 8 to open. A stop surface 20 facing the armature 4 is formed on the stop element 11, on which the armature 4 is stopped with its first end side 22.
Then, the valve needle 8 is also accelerated further together with the armature 4. After the armature 4 has stopped with its first end side 22 on the inner pole 5, the valve needle 8 continues its movement in the opening direction 17 due to its inertia, wherein a movement deflection occurs due to the force of the restoring spring 16. Subsequently, when the valve needle 8 moves in a closing direction, which is opposite to the opening direction 17, the valve needle 8 or the stop 11 again strikes the armature 4, which ideally does not rest on the inner pole 5 until this point in time. When the solenoid 3 is de-energized, the armature 4 again returns to the initial position shown in fig. 1, in which it rests with its second end side 23 on the stop element 12.
The configuration of the valve 1 is further explained below, also with reference to fig. 2. Fig. 2 shows a schematic perspective view of a part of the valve 1 shown in fig. 1 according to an exemplary embodiment.
In order to simplify this illustration, the inner pole 5 and the return spring 16 as well as the housing 6 of the valve 1 are not shown in particular here.
The stop element 11 has a spring receptacle 25 into which the armature free travel spring 18 is at least partially inserted. The armature free travel spring 18 is designed in such a way that it surrounds the valve needle 8 in the circumferential direction with respect to the longitudinal axis 7. The configuration of the armature free travel spring 18 is shown schematically in the drawings as a wire spring having a plurality of coils. However, the armature free-travel spring 18 may also be implemented in other ways. Furthermore, a series connection and/or a parallel connection of the spring elements is also conceivable.
The spring receptacle 25 is configured in such a way that the armature free travel spring 18 can be received in an advantageous manner when the armature 4 comes to rest on the stop surface 20 of the stop element 11. Furthermore, the spring receptacle 25 is preferably designed such that a good manufacturability of the stop element 11 is achieved. Furthermore, the spring receptacle 25 is preferably designed such that, when the armature 4 comes to rest on the stop element 11, a large contact surface is preferably produced between the first end side 22 of the armature 4 and the stop surface 20 of the stop element 11. Advantageous measures for achieving this are also described in detail below.
In this embodiment, the spring receiving portion 25 abuts on the valve needle 8. In particular, in this exemplary embodiment, the stop element 11 has a stepped bore 26, wherein, as viewed along the longitudinal axis 7, the stepped bore 26 has a first section 27, which forms the spring receptacle 25, and a second section 28, at which the stop element 11 is connected to the valve needle 8. In particular, the bore 29 of the stepped bore 26 realized in the second section 28 can be designed with a smaller inner diameter than the diameter 30 of the valve needle 8, so that a press fit 31 is produced between the stop element 11 and the valve needle 8.
An armature contact surface 35 is provided on the armature 4, on which the armature free travel spring 18 is supported. The armature contact surface 35 is at a height 36, as viewed relative to the longitudinal axis 7. Furthermore, the first end side 22 of the armature 4 is at a height 37, as viewed along the longitudinal axis 7. The height 36 of the armature bearing surface 35 is now equal or at least substantially equal to the height 37 of the first end side 22. In this way, an annular groove is eliminated in the armature 4, as is the case with conventional armatures, in order to insert the armature free travel spring 18 into said annular groove. In particular, a simplified manufacturability of the armature 4 results. However, this does not exclude that, if the first end face 22 is not configured completely flat, for example, the armature contact surface 35 is offset, in particular slightly set back, in height 36 on the first end face 22, for example, relative to an outer region 38 on the first end face 22 of the armature 4. However, the end faces 22, 23 of the armature 4 can also be completely flat, either individually or both.
Furthermore, the spring receptacle 25 of the stop element 11 is configured in such a way that the armature free-travel spring 18 is radially surrounded by the stop element 11 on the stop surface 20. This results in a large contact surface when the armature 4 comes to rest against the stop element 11.
In order to avoid dead volumes in the spring receptacle 25, a certain connection to the fluid guided through the guide bore 39 of the inner pole 5 or a certain throughflow of the spring receptacle 25 is achieved. In this exemplary embodiment, a plurality of notches 40A to 40C are provided on the stop element 11, which notches each open both in the radial direction and in the opening direction 17, i.e. counter to the flow direction 41 of the fluid through the guide bore 39. In particular, four such notches 40A to 40C can be provided, wherein the notches 40A to 40C are shown and designated in fig. 1 and 2. The notches 40A to 40C intersect the spring receiving portion 25. A thorough flushing of the spring receptacle 25 is thereby achieved.
Furthermore, the stop element 11 can be guided in the guide bore 39 of the inner pole 5 along the longitudinal axis 7. The fluid can be guided from the guide bore 39 into the armature chamber 42 in a suitable manner, wherein this can also take place at least partially via the notches 40A to 40C and/or the cutouts provided on the inner pole 5. On the armature 4 side, the fluid can be guided, if necessary, through an annular gap 43 between the armature 4 and the housing 6. In addition or alternatively, the armature 4 may also preferably have through openings 44, 45 that are formed coaxially to the longitudinal axis 7, wherein the through openings 44, 45 are indicated by way of example.
Suitable variants can also be considered, depending on the application. For example, instead of press fit 31, a snug guidance of stop element 11 on valve needle 8 can also be achieved. In addition or alternatively, a connection between the stop element 11 and the valve needle 8 can also be realized, which connection is based on another connection principle, in particular a material-locking connection.
The invention is not limited to the illustrated embodiments.

Claims (10)

1. A valve (1) for metering a fluid, in particular a fuel injection valve for an internal combustion engine, having an armature (4) of an electromagnetic actuator (2) and a valve needle (8) which can be actuated by the armature (4) and which serves for actuating a valve closing body (9) which, in cooperation with a valve seat surface (10), forms a sealing seat, wherein the armature (4) is movably guided on the valve needle (8), wherein at least one stop element (11) is provided which is arranged in a positionally fixed manner on the valve needle (8) and which limits a relative movement between the armature (4) and the valve needle (8) in connection with an actuation of the valve needle (8), wherein at least one armature free travel spring (18) is provided which is supported on one side at least indirectly on the armature (4), and on the other side at least indirectly on the stop element (11), and the armature free-travel spring surrounds the valve needle (8),
it is characterized in that the preparation method is characterized in that,
the stop element (11) has a spring receptacle (25) into which the armature free travel spring (18) is at least partially inserted.
2. The valve as set forth in claim 1, wherein,
it is characterized in that the preparation method is characterized in that,
the spring receptacle (25) adjoins the valve needle (8).
3. The valve according to claim 1 or 2,
it is characterized in that the preparation method is characterized in that,
at least one notch (40A-40C) which is open with respect to the surroundings is provided on the stop element (11), and the notch (40A-40C) intersects the spring receptacle (25).
4. The valve as set forth in claim 3,
it is characterized in that the preparation method is characterized in that,
the slots (40A-40C) are open at least radially and/or at least counter to the flow direction (41) of the fluid.
5. The valve according to claim 3 or 4,
it is characterized in that the preparation method is characterized in that,
the stop element (11) is guided in a guide bore (24) of an inner pole (5) of the actuator (2), wherein during operation fluid is guided into an armature chamber (42) through the guide bore (24) and a through-flow of fluid can be achieved at least partially via notches (40A-40C) of the stop element (11).
6. The valve according to any one of claims 1 to 5,
it is characterized in that the preparation method is characterized in that,
the stop element (11) has a stepped bore (26), the stepped bore (26), viewed along the longitudinal axis (7), having a first section (27) which forms the spring receptacle (25) and a second section (28) at which the stop element (11) is connected to the valve needle (8).
7. The valve as set forth in claim 6,
it is characterized in that the preparation method is characterized in that,
a press fit (31) is formed between the stop element (11) and the valve needle (8) on the second section (28) of the stepped bore (28).
8. The valve according to any one of claims 1 to 7,
it is characterized in that the preparation method is characterized in that,
the armature (4) has an end face (22) facing the stop element (11), the armature free travel spring (18) is supported on an armature support face (35) of the armature (4), and the armature support face (35) is arranged at the same height (36) as the end face (22), or at least substantially at the height (37) of the end face (22), as viewed relative to the longitudinal axis (7).
9. The valve according to any one of claims 1 to 8,
it is characterized in that the preparation method is characterized in that,
a stop surface (20) for the armature (4) is formed on the stop element (11), and the spring receptacle (25) is designed in such a way that the armature free travel spring (18) is radially enclosed by the stop element (11) at least on the stop surface (20).
10. The valve according to any one of claims 1 to 9,
it is characterized in that the preparation method is characterized in that,
the stop element (11) is designed as a metal powder injection molded part or a press-sintered part.
CN202010715923.0A 2019-07-23 2020-07-23 Valve for metering fluids Pending CN112282994A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019210906.3A DE102019210906A1 (en) 2019-07-23 2019-07-23 Valve for metering a fluid
DE102019210906.3 2019-07-23

Publications (1)

Publication Number Publication Date
CN112282994A true CN112282994A (en) 2021-01-29

Family

ID=74098801

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010715923.0A Pending CN112282994A (en) 2019-07-23 2020-07-23 Valve for metering fluids

Country Status (3)

Country Link
KR (1) KR20210011885A (en)
CN (1) CN112282994A (en)
DE (1) DE102019210906A1 (en)

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Publication number Publication date
DE102019210906A1 (en) 2021-01-28
KR20210011885A (en) 2021-02-02

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