KR101820829B1 - Solenoid valve for high pressure having guide structure - Google Patents

Solenoid valve for high pressure having guide structure Download PDF

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Publication number
KR101820829B1
KR101820829B1 KR1020150173444A KR20150173444A KR101820829B1 KR 101820829 B1 KR101820829 B1 KR 101820829B1 KR 1020150173444 A KR1020150173444 A KR 1020150173444A KR 20150173444 A KR20150173444 A KR 20150173444A KR 101820829 B1 KR101820829 B1 KR 101820829B1
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KR
South Korea
Prior art keywords
guide
ball
valve seat
armature
diameter portion
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KR1020150173444A
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Korean (ko)
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KR20170067051A (en
Inventor
박중원
박정환
송재천
신문성
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주식회사 현대케피코
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Priority to KR1020150173444A priority Critical patent/KR101820829B1/en
Publication of KR20170067051A publication Critical patent/KR20170067051A/en
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Publication of KR101820829B1 publication Critical patent/KR101820829B1/en

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    • 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
    • F02M51/0671—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
    • F02M51/0675—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 the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
    • 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
    • F02M61/04—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
    • F02M61/04—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
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F02M61/1813—Discharge orifices having different orientations with respect to valve member direction of movement, e.g. orientations being such that fuel jets emerging from discharge orifices collide with 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
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F02M61/1833—Discharge orifices having changing cross sections, e.g. being divergent
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/188—Spherical or partly spherical shaped valve member ends
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1886—Details of valve seats not covered by groups F02M61/1866 - F02M61/188

Abstract

A second guide portion which is composed of a housing, a solenoid coil portion, a core, a needle assembly and the like and into which the first guide portion of the needle assembly can be inserted, and a ball guide portion into which the ball can be inserted, Pressure solenoid valve that can smoothly move even in a high-pressure fuel and accurately open and close a valve according to a control power signal to accurately inject fuel.

Description

SOLENOID VALVE FOR HIGH PRESSURE HAVING GUIDE STRUCTURE "

This technique relates to a solenoid valve. In particular, the present invention is directed to a solenoid valve that includes a needle assembly and a guide structure for guiding the needle assembly even under a high pressure fuel state, so that the needle assembly can accurately move up and down according to a control power source .

The injector (hereinafter referred to as "solenoid valve") is a fuel injection nozzle, which injects fuel into the cylinder when it is injected into the cylinder.

Recently, GDI (direct injection of gasoline) method, which directly injects gasoline into an engine cylinder, is used to satisfy exhaust gas pollution control of automobile, increase of output of automobile, and improvement of fuel efficiency of automobile.

This GDI method injects fuel at a higher pressure than MPI (Gasoline Multi Point Fuel Injection), which requires a pressure of 200 bar or more.

When the injector is supplied with current, the needle of the injector is sucked upward, and the ball formed at the lower portion of the needle is sucked together to open the injection nozzle (hereinafter referred to as "injection hole") Fuel is injected.

Therefore, for accurate control of the fuel injection, it is important that the solenoid valve injects the correct fuel only at the precisely calculated time according to the control signal.

However, since each component of the solenoid valve (especially the needle shaft) is located in the high-pressure fuel, the movement of the needle is hampered by the high-pressure fuel, and this disturbance develops as a problem that precludes accurate control of fuel injection.

Therefore, in order to control a high-pressure solenoid valve, there is a patent publication such as a high-pressure injector control device for a gasoline vehicle such as an application No. "10-1996-0047298 " There are patents such as fuel injectors.

It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as an admission that the prior art is known to those skilled in the art.

The solenoid valve comprises an armature and a needle shaft movably connected with the armature, and a ball movably connected with the needle shaft.

Each of these configurations is located in the high-pressure fuel.

When power is applied to the solenoid valve, the armature is sucked and moved upward, and the needle shaft and the ball are movably connected to the armature. When the armature moves, the needle shaft and the ball move to the upper portion. Thereby opening the injection hole.

However, when the armature is sucked, the needle shaft and ball are hampered by a linear upward movement due to the high pressure fuels present around them.

In addition, when the power to the solenoid valve is cut off, the needle shaft and the ball move linearly downward together with the armature to cut off the injection hole. However, even in this shut-off operation, the linear movement of the lower portion due to the high-

Due to the obstruction of the high-pressure fuel, the solenoid valve is accurately opened at a precise time, which makes it difficult to control the solenoid valve which injects an accurate amount of fuel.

In addition, when the needle shaft is moved as the armature moves, the needle shaft is moved in the high-pressure fuel, and can not move linearly due to the high-pressure fuel, and is shaken to the left or right. The linear motion disturbance of the needle shaft causes a problem that the ball connected to the lower portion of the needle shaft can not be controlled, resulting in malfunction of the valve.

Therefore, there is a need for a new solenoid valve in which the needle shaft and ball move smoothly even in high-pressure fuel, thereby improving the malfunction of the valve.

According to an aspect of the present invention, there is provided a high-pressure solenoid valve including a housing, a solenoid coil part, a core, a needle assembly, and a second guide.

Here, the housing constitutes the outer surface of the solenoid valve, and a space is formed therein, and the components are installed therein.

Here, the housing comprises a carrier.

Here, the carrier has a hollow space in the longitudinal direction, and the first guide, the second guide, and the needle shaft are located in the hollow space.

The armature is positioned between a first guide (which is referred to as a "first guide" hereinafter) and a core end, and the armature and the needle shaft are movably connected.

Here, the hollow of the carrier is composed of a large diameter portion having the largest diameter, a middle diameter portion having a diameter smaller than that of the large diameter portion, and a small diameter portion having the smallest diameter and the longest diameter connected to inclined surfaces inclined in the axial direction.

The solenoid coil portion is composed of a bobbin and a coil wound on the bobbin.

Here, one side of the coil may be connected to the connector to supply power.

The needle assembly is composed of an armature, a first guide, a needle shaft, and the like.

Here, the armature is formed with a passage penetrating through one side in a straight line, and a groove is formed in the upper center. The groove is provided with a damper spring.

The needle assembly has a first guide connected to the armature and a center lower portion of the armature, and the needle shaft is connected through the center portion of the armature and the first guide.

Here, the ball is connected to the lower portion of the needle shaft. Therefore, when the needle shaft moves up and down together, it moves upward and downward to open and close the valve.

The needle shaft can be moved by the movement of the armature when the armature is sucked.

Here, the first guide may be inserted into the hollow portion formed in the second guide, the first guide may have a first surface that is in contact with the inner surface of the second guide and guided by the upward and downward movement of the straight line, And a second surface that is inclined in the axial direction and formed to have a small width.

The second guide guides the upward and downward movement of the straight line of the needle assembly by inserting the first guide.

Here, the second guide is press-fitted and inserted into the small-diameter portion of the carrier so that the respective edges formed on the second guide are in contact with each other.

The valve seat may be press-fitted and fixed in the lower portion of the carrier.

Here, the valve seat is seated with the ball, and the injection hole formed at the lower portion is opened and closed by the upward and downward movement of the ball.

Here, an inclined surface formed at the lower central portion of the valve seat and inclined downward in the axial direction is formed.

The injection hole is formed in the inclined surface through the valve seat. The injection hole is formed in the inclined surface. The injection hole is inclined in the radial direction toward the lower part.

Here, at least one or more ejection holes are formed.

A ball guide is provided on the inner surface of the valve seat to form a hollow into which the ball can be inserted and guide the ball to move up and down in a straight line.

At least one of the valve seat and the ball guide is provided with a stepped portion.

Further, the ball guide is formed with a passage through which the ball guide is linearly passed from one side.

The solenoid valve of the present invention, which is formed to include the needle assembly including the first guide and the second guide inserted and guided by the first guide, is capable of smooth linear up and down movement even in high pressure fuel.

In addition, a ball guide formed at the lower part of the needle shaft and a hollow ball guide having a hollow therein are installed to guide the ball into the hollow so that the ball moves linearly upward and downward. Thus, even in high-pressure fuel, This is possible.

Also, since the solenoid valve is assembled with the solenoid valve body after the needle assembly is formed first, it is easy to manufacture.

The solenoid valve has a spray hole formed through the valve seat. Since the spray hole is formed to be inclined radially toward the bottom, fuel can be sprayed over a wide range when injecting fuel.

Further, the upper and lower portions of the needle assembly can be guided by using the second guide and the ball guide, thereby smoothly moving the needle assembly in the high-pressure fluid.

1 is a cross-sectional view of a solenoid valve according to an embodiment of the present technique.
FIG. 2 is a view illustrating a solenoid valve body and a needle assembly according to an embodiment of the present invention. Referring to FIG.
FIG. 3A is an enlarged view of a top surface to which a carrier, a second guide, a first guide, and a needle shaft are coupled according to an embodiment of the present invention. FIG. 3B is a cross- Fig.

Hereinafter, one embodiment of the present technology will be described in detail with reference to exemplary drawings. However, this is not intended to limit the scope of the present technology.

It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In addition, the size and shape of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, terms specifically defined in consideration of the structure and operation of the present technology are intended to illustrate embodiments of the present technology, and do not limit the scope of the present technology.

1 is a cross-sectional view of a solenoid valve according to an embodiment of the present technique.

The housing comprises an upper housing 210, a middle housing 220 and a lower housing (hereinafter "carrier 230").

A yoke 70 is disposed at a lower portion of the upper housing 210 and constitutes an upper surface of the upper portion of the solenoid valve 3.

An O-ring is provided on the upper side of the upper housing 210. The O-ring is positioned to surround the outer side of the upper housing 210 and presses one side of the upper housing 210. Thus, the O-ring serves to seal the upper housing 210.

The upper housing 210 is hollow and the hollow is formed to pass through the upper housing 210. The hollow may be provided with a fuel supply unit 40 through which fuel is supplied.

The central housing 220 is formed outside the solenoid coil part 20 to surround the solenoid coil part 20. [ The center housing 220 has a cross section formed in the shape of "C ", and also has a space in which the respective components of the solenoid valve 3 can be located.

The carrier 230 is formed long in the longitudinal direction in a hollow form. The hollow portion formed in the carrier 230 is composed of a large-diameter portion 231, a large-diameter portion 232, and a small-diameter portion 234 without a constant width.

The large-diameter portion 231 is a hollow portion formed between protruding surfaces formed by protruding one side of the carrier 230 as a portion having the largest width. The large diameter portion 231 is smaller than the width of the armature 110.

The large-diameter portion 231 ensures a sufficient space for the first guide 130 to move up and down. However, the diameter of the second guide 150 is increased to be inserted. The diameter of the large-diameter portion 231 is kept constant at a certain length.

The large diameter portion 232 has a width smaller than that of the large diameter portion 231 and is formed larger than the small diameter portion 234. The middle diameter portion 232 is formed at a position where the inner surface of the carrier 230 is stepped.

The small diameter portion 234 is formed with a constant diameter in the longitudinal direction and is connected to the large diameter portion 232 through an inclined surface 233 inclined in the axial direction. In other words, it is connected through the inclined surface 233 which tilts in the axial direction while maintaining a constant angle from the middle part 232 toward the lower part.

The second guide 150 can be press-fitted into the small diameter portion 234. For example, when the corner 151 of the second guide 150 formed in a square shape is press-fitted into the circular hollow portion, Lt; / RTI >

That is, the second guide 150 is installed to be fixed inside the carrier 230. The second guide 150 guides a movement of the first guide 130 by providing a hollow space into which the first guide 130, which will be described later, can be inserted. That is, the second guide 150 is fixedly installed in the carrier 230 and is fixedly installed to guide the first guide 130 to linearly move. This is effective to guide the movement of the needle shaft 140 . The needle shaft 140 is linearly moved by the first guide 130 and the second guide 150, so that the needle shaft 140 linearly moves even when the needle shaft 140 moves in the high-pressure fuel. This is realized as an effect of preventing the malfunction of the solenoid valve 3 eventually.

Further, the carrier 230 is formed with a yoke contact surface 235 which is in contact with the yoke 70 in the longitudinal direction. Here, the cross section of the yoke contact surface 235 is in the form of "b ". Therefore, the yoke contact surface 235 (a) formed in the axial direction may be in contact with the inner surface of the yoke 70, and the yoke contact surface 235 (b) formed in the transverse direction may be in contact with the lower surface of the yoke 70.

The connector 10 is formed on one side of the solenoid valve 3. The connector 10 serves to supply power to the solenoid valve 3 in accordance with a controlled power supply.

The solenoid coil portion 20 is connected to the connector 10 and arranged in the longitudinal direction. The solenoid coil portion 20 is composed of a bobbin and a coil wound on the bobbin.

A current is applied to the coil according to the power supply of the connector 10, and a magnetic force is generated when a current is applied.

Here, the connector 10 and the solenoid coil portion 20 may be integrally formed by insert injection molding.

The yoke 70 is formed in a cylindrical shape and is formed to surround the inside of the solenoid coil portion 20. The yoke 70 forms a space for accommodating the components of the solenoid valve 3 therein and does not block the magnetic force of the solenoid coil part 20 formed on the outside.

A core 30, a fuel transfer passage 50, a return spring 60, and a needle assembly 2 may be disposed in the inner space of the yoke 70.

In addition, the connector 10, the solenoid coil portion 20, and the yoke 70 may be integrally formed by injection injection molding.

The core 30 is disposed in the longitudinal direction in the inner space of the yoke 70.

The core 30 receives a magnetic force formed in the solenoid coil part 20 and acts as an electromagnet so as to attract the armature 110 to move the armature 110 upward.

A space is formed in the central portion of the core 30. [ In this space, there is formed a fuel transfer passage 50 through which the high-pressure fuel supplied from the fuel supply section 40 can move, and a return spring 60 is provided below the fuel transfer passage 50.

The space in which the return spring 60 is installed is formed to be constant in width in the longitudinal direction and is formed to have a larger width as it goes downward. The width of the stopper 120 is larger than the width of the stopper 120, but the width of the stopper 120 is smaller than the width of the stopper upper surface 121.

The needle assembly 2 is formed by a stopper 120, an armature 110, a first guide (or a position ring, hereinafter referred to as a "first guide"), Is not closed so as not to interfere with the movement of the fuel.

In addition, a groove is formed in a center portion of the armature 110, and a damper spring 112 is formed in the groove. The presence of the damper spring 112 has the effect of alleviating the impact applied to the needle assembly 2 when the needle assembly 2 moves up and down.

Furthermore, the above structure is a structure formed considering the debouncing effect when the solenoid valve 3 is powered or shut off.

The length in which the armature 110 moves up and down is shorter than the distance between the upper surface 131 of the first guide 130 and the upper surface of the second guide 150 so that even when the armature 110 moves up and down, Only the first surface 132 of the guide 130 moves in a state of being inserted into the hollow portion of the second guide 150 and the upper surface 131 of the first guide 130 does not collide with the second guide 150 .

The lower surface of the stopper 120 is formed so as to be able to sufficiently face the armature 110, and a groove is formed in the lower center portion.

The first guide 130 is installed below the armature 110. The first guide 130 may be movably connected to the needle shaft 140. Therefore, the first guide 130 can move together when the needle shaft 140 moves. The upper surface 131 of the first guide 130 is formed to have the largest width so that when the first guide 130 is installed on the armature 110,

The first guide 130 includes a first surface 132 and a second surface 133.

The first surface 132 is formed to have a constant width in the longitudinal direction. The first surface 132 is in contact with the inner surface of the second guide 150. When the first surface 132 is moved up and down, So that only the upward and downward movement of the straight line is possible even under the high-pressure fuel condition.

The second surface 133 is connected by an inclined surface that is smaller in width than the first surface 132 and is inclined axially on the second surface 133.

Or a shape in which the overall shape of the first surface 132 and the inclined surface is formed to be smaller in width on the second surface 133 and rounded.

The first guide 130 is inserted into the second guide 150 described above.

The second guide 150 is fixed to the small diameter portion 230 and has a space in which the first guide 130 is inserted. The space of the second guide 150 is formed such that the first guide 130 is movable but linearly movable.

Since the first guide 130 is movably connected to the needle shaft 140, the first guide 130 moves according to the movement of the needle shaft 140. Here, the first guide 130 is linearly moved by the bar second guide 150 inserted in the space in the second guide 150.

That is, the needle shaft 140 is guided linearly by the second guide 150 and the first guide 130 in the high-pressure fuel, thereby improving the reliability of operation in which the valve opening / closing operation of the solenoid valve 3 is assured And the malfunction of the solenoid valve 3 can be improved.

The needle shaft 140 is elongated in the longitudinal direction and penetrates the central portion of the stopper 120, the armature 110, and the first guide 130.

The needle shaft 140 is formed in a bar shape and a ball 160 is installed at a lower end thereof.

The needle shaft 140 and the ball 160 perform a linear upward and downward motion to open the injection hole 313 of the solenoid valve 3.

Here, when the solenoid valve 3 injects the fuel, the return spring 60 normally applies a force toward the lower side of the solenoid valve 3, that is, toward the lower side. Accordingly, the solenoid valve 3, which is being urged downward by the return spring 60, also moves downward and closes the injection hole 313 formed at the lower portion of the ball 160. Then, when power is applied from the connector 10, a magnetic force is formed in the solenoid coil part 20, and the core 30 induces the direction of the magnetic force to act as an electromagnet. Therefore, the armature 110 of the needle assembly 2 is moved upward to overcome the force acting on the return spring 60 as a lower part.

When the armature 110 moves upward, the needle shaft 140 movably connected to the armature 110 and the ball 160 connected to the lower portion of the needle shaft 140 move upward. Accordingly, the injection hole 313 in which the ball 160 is closed is opened, and the fuel is injected through the injection hole 313.

In this case, the core 30 also terminates the function of the electromagnet. Thus, the force of the return spring 60 causes the armature 110 to move to the solenoid coil portion 20, And the ball 160 of the needle assembly 2 is again in the form of closing the injection hole 313 again. The second guide 150 has a space in which a first surface 132 of the first guide 130 can be inserted into a hollow space and is formed in a shape having an edge, for example, a square shape .

The second guide 150 is installed so that each edge 151 is press-fitted into the small-diameter portion 234 formed on the carrier 230. For example, each corner 151 of the second guide 150 formed in a square shape may be press-fitted into a small-diameter portion 234 formed in a circular shape. Therefore, the second guide 150 is fixedly coupled to the small diameter portion 234, and only the respective corners 151 are press-fitted into the circular shape. Between the surfaces connecting the corners 151 and the carrier 230, A space is formed and a passage through which high-pressure fuel can move is formed.

In addition, the second guide 150 is formed to extend to one side of the small-diameter portion 234 through the inclined surface 233 in the longitudinal direction. Accordingly, even when the needle assembly 2 moves upward or downward, the first surface 132 is in contact with the second guide 150, and is guided by the upward and downward movements of the straight line.

The valve seat 310 may be formed to be press-fitted in the lower portion of the carrier 230. That is, the outer surface of the carrier 230 may be fixed in contact with the inner surface of the valve seat 310. Or the valve seat 310 may be integrally formed at the lower portion of the carrier 230. [

The valve seat 310 is seated with a ball 160 connected to the needle shaft 140. When the ball 160 is seated, the injection hole 313 formed in the lower portion of the valve seat 310 may be closed.

The inner bottom surface of the valve seat 310 may be formed with an inclined portion 312 which is inclined in the axial direction toward the center. That is, the lower portion of the valve seat 310 is formed in a conical shape in the presence of the inclined portion 312.

 A spray hole 313 may be formed in the inclined portion 312. The injection hole 313 is formed to be inclined radially toward the bottom. For example, when two injection holes 313 are formed, the angle between the injection holes 313 may become larger toward the bottom.

Here, the ball 160 and the valve seat 310 are positioned on the valve seat 310 to close the injection hole 313, so that the ball 160 and the valve seat 310, So that the center of the ball formed by the ball 160 is separated from the center of the valve seat 310 without being in contact with the center of the valve seat 310, And contacts the inclined portion 312 of the sheet 310 to close the injection hole 313. [

That is, the injection hole 313 is formed in the inclined portion 312 of the valve seat 310, and is formed at a place where the inclined portion 312 is in contact with the ball 160.

At least one or more of the injection holes 313 are formed. This is because the injection hole 313 is formed in the inclined portion 312 under the valve seat 310 and is inclined in the radial direction so that a space for forming the plurality of injection holes 313 is provided.

The diameter of the injection hole 313 is formed by the first diameter 313 (a) and the second diameter 313 (b).

The first diameter 313 (a) is formed smaller than the second diameter 313 (b). That is, the injection hole 313 has the first diameter 313 (a) as it goes from the upper part to the lower part, and the second part 313 (b) has the second diameter 313 (b).

A ball guide 320 is inserted into the inner surface of the valve seat 310. That is, the ball guide 320 can be press-fitted into the inner surface of the valve seat 310 and fixed.

Here, the ball guide 320 may be located at a step 311 formed on the inner surface of the valve seat 310, or may be formed by a projecting surface protruding downward from the outermost portion of the ball guide 320, 311 may be formed.

The ball guide 320 can be strongly coupled with the valve seat 310 because the outer surface thereof is in contact with the valve seat 310 and the outermost circumference of the lower surface is supported by the step 311 of the valve seat 310 have.

The ball guide 320 may be hollow to accommodate the spherical balls 160.

A flow path 321 passing through the ball guide 320 is formed in a straight line between the hollow portion and a place where the step portion 311 of the valve seat 310 is in contact.

Since the flow path 321 is formed between the hollow portion and the step portion 311, it has a space capable of moving the fuel without any interference.

The inner surface of the hollow portion of the ball guide 320 is shaped to be in contact with the outer surface of the ball 160.

In addition, the valve seat 310 is formed to have a constant thickness so that the ball 160 can not move out of the hollow portion even if the ball 160 moves up and down.

The solenoid valve 3 according to the embodiment is configured such that the first guide 130 is inserted into the second guide 150 so that the needle assembly 2 is guided by the linear motion up and down, The guide 320 guides the ball 160 up and down so that it can move smoothly even in high-pressure fuel.

2 is a view showing the body 1 and the needle assembly 2 of the solenoid valve 3 according to the embodiment of the present invention separated.

According to one embodiment, the solenoid valve 3 is formed by the body 1 and the needle assembly 2. [

That is, since the body 1 of the solenoid valve 3 (this is a configuration excluding the needle assembly 2 in the configuration of the solenoid valve 3) and the needle assembly 2 are separately formed and assembled into one, .

3A is an enlarged view of a top surface to which the carrier 230, the second guide 150, the first guide 130, and the needle shaft 140 are coupled according to the embodiment of the present invention. FIG. And the valve seat 310 and the ball 160 guide are engaged with each other.

3A, it can be seen that the four corners 151 formed on the second guide 150 are press-fitted into the circular hollow portion of the small-diameter portion 234 of the carrier 230 A first surface 132 of the first guide 130 is inserted into the hollow portion of the second guide 150 and a needle shaft 140 formed through the first guide 130 at its center It can be seen that it is located.

3B, it can be seen that the ball 160 is inserted into the hollow portion of the ball guide 320 which is press-fitted into the valve seat 310 separately.

The upper portion of the needle shaft 140 is guided by the second guide 150 in the upper and lower linear motions so that the ball 160 of the splay blade 2 is guided by the ball guide 320 The upper and lower linear motion are guided.

In other words, both the upper and lower portions of the needle assembly 2 receive linear guides, so that upward and downward movements of the straight line can be performed even in the high-pressure fluid, and the fuel of the solenoid valve 3 The injection time and the injection amount can be adjusted.

While the present invention has been particularly shown and described with reference to particular embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit of the invention, It will be apparent to those of ordinary skill in the art.

1: Body 2: Needle assembly
3: Solenoid valve 10: Connector
20: Solenoid coil part 30: Core
40: fuel supply unit 50: fuel passage
60: return spring 70: yoke
110: Amateur 111: Amateur's Euro
112: damper spring 120: stopper
121: stopper upper surface 130: first guide or position ring
131: first guide upper surface 132: first surface
133: Second side 140: Needle shaft
150: second guide or guide 151: second guide edge
160: ball 210: upper housing
220: Central housing 230: Carrier
231: large-diameter part 232:
233: slope 234: small diameter portion
235: yoke contact surface 235 (a): longitudinal yoke contact surface
235 (b): lateral yoke contact surface 310: valve seat
311: stepped portion 312: inclined portion
313: injection hole 313 (a): first diameter of the injection hole
313 (b): second diameter of the ejection hole 320: ball guide
321: Euro of the ball guide.

Claims (12)

Wherein the hollow of the carrier comprises a large diameter portion having a large diameter, a small diameter portion having a small diameter, and a middle diameter portion having a diameter between the large diameter portion and the small diameter portion;
A solenoid coil part disposed at one side of the housing and including a coil for generating a magnetic field when power is applied;
At least a portion of which is installed in the solenoid coil part;
A first guide disposed at a lower portion of the armature, a needle shaft passing through the armature and the first guide in a bar shape and movably connected to the armature and the first guide, A needle assembly moving up and down depending on whether power is applied to the coil part; And
A ball formed below the needle shaft to open and close the valve; And
Wherein the needle assembly includes at least two edges that are inserted into the inner wall of the small diameter portion and are press-fitted into the small diameter portion of the small diameter guide, And a second guide formed so as to be spaced apart from the inner wall of the small-diameter portion so as to form a passage through which fuel flows,
And a solenoid valve. delete delete delete The method according to claim 1,
Wherein a groove is formed in a center portion of the armature and a spring is provided in the groove to alleviate an impact applied to the needle assembly. The method according to claim 1,
Wherein a valve seat on which the ball is seated is formed on a lower portion of the carrier, or the valve seat is inserted and fixed to a lower portion of the carrier. The method according to claim 6,
On the inner surface of the valve seat,
And a ball guide for guiding the upward and downward movement of the ball is installed. 8. The method of claim 7,
Wherein at least one of the inner surface of the valve seat and the outermost surface of the ball guide is formed with a stepped portion to define a predetermined gap with the inner surface of the lower portion of the valve seat. 9. The method of claim 8,
And a flow path passing through the ball guide is formed on one side of the ball guide. The method according to claim 6,
Wherein at least one injection hole passing through the valve seat is formed in the inclined portion and the injection hole is formed so as to be inclined radially as it goes downward Features include solenoid valve. delete delete
KR1020150173444A 2015-12-07 2015-12-07 Solenoid valve for high pressure having guide structure KR101820829B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220055147A (en) 2020-10-26 2022-05-03 주식회사 현대케피코 Stopper member for an injector and the injector
KR20220067149A (en) 2020-11-17 2022-05-24 주식회사 현대케피코 Injector for Inducing Rotation of Needlebar and Position Ring for Injector

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102424668B1 (en) * 2020-11-18 2022-07-25 주식회사 현대케피코 Solenoid valve
CN114738155B (en) * 2022-04-27 2023-07-14 一汽解放汽车有限公司 Fuel injection valve assembly, engine and vehicle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4080329B2 (en) * 2000-10-23 2008-04-23 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Fuel injection valve
WO2015172978A1 (en) * 2014-05-13 2015-11-19 Delphi International Operations Luxembourg S.À R.L. Fuel injector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4080329B2 (en) * 2000-10-23 2008-04-23 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Fuel injection valve
WO2015172978A1 (en) * 2014-05-13 2015-11-19 Delphi International Operations Luxembourg S.À R.L. Fuel injector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220055147A (en) 2020-10-26 2022-05-03 주식회사 현대케피코 Stopper member for an injector and the injector
KR20220067149A (en) 2020-11-17 2022-05-24 주식회사 현대케피코 Injector for Inducing Rotation of Needlebar and Position Ring for Injector

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