KR102192463B1 - Exhaust cotrol valve of electronic control air suspension system - Google Patents

Abstract

The present invention relates to an exhaust control valve of an electronically controlled air suspension system, wherein a solenoid valve (conventional exhaust control valve) that exhausts compressed air under normal operating pressure and a relief valve that exhausts compressed air when excessive pressure occurs. It is integrated into. As the number of valves is reduced, it is easy to assemble and respond to failures, and the structure of the exhaust channel of the system is simplified.

Description

Exhaust control valve of electronically controlled air suspension system {EXHAUST COTROL VALVE OF ELECTRONIC CONTROL AIR SUSPENSION SYSTEM}

The present invention relates to an exhaust control valve of an electronically controlled air suspension system, and more particularly, to an exhaust control valve for controlling an internal pressure of an electronically controlled air suspension system for a vehicle.

The electronically controlled air suspension system of a vehicle is a suspension system that controls the amount of air in the air spring to control the attitude of the garage and the vehicle, and absorb vibrations and shocks during driving.

To this end, the electronically controlled air suspension system is provided with an air compressor for generating compressed air and an exhaust control valve for controlling the internal pressure of the system by controlling air exhaust.

In addition, when an excess pressure exceeding the range of use occurs in the air compressor, it is immediately discharged to the atmosphere and a relief valve is provided to prevent the internal pressure of the system from rising above the working pressure.

The exhaust control valve is a solenoid valve that can be controlled by an electronic control unit (ECU), and the relief valve is a mechanical valve that opens and closes in response to an excessive pressure of an air compressor.

On the other hand, the exhaust control valve and the relief valve were each composed of separate parts.

Therefore, since the two valves had to be inspected and assembled separately, not only the inspection and assembly man-hours increased, the flow path structure between them was complicated, and the cause diagnosis and replacement became difficult when a failure of the air suspension system occurred.

Republic of Korea Patent Publication No. 10-2012-0124670 (2012.11.14.)

Accordingly, the present invention was conceived to solve the above problems, reducing the number of inspection and assembly man-hours for the exhaust control valve and the relief valve, simplifying the flow path structure, and making it easier to diagnose the cause and replace the valve when a failure occurs. An object thereof is to provide an exhaust control valve for an electronically controlled air suspension system.

The present invention for achieving the above object is a solenoid unit having a coil, an armature operated when power is supplied to the coil, and a valve member interlocked with the armature, and the valve member coupled to the lower portion of the solenoid unit and inside A flow path that is opened and closed by the flow path is formed to discharge compressed air having a pressure within the normal use range through the flow path, and a separate flow path different from a flow path installed inside the flow path part and opened and closed by the valve member It includes a relief valve for discharging compressed air having a pressure exceeding the normal use range through.

The flow path opened and closed by the valve member operated by the solenoid part includes a plurality of first inflow holes formed on the upper side of the flow path part, a chamber communicating with the first inflow hole, and an exhaust flow path inlet hole formed downward from the center of the chamber. And, a horizontal passage hole connected to the lower end of the exhaust passage inlet hole, and a pair of vertical passage holes extending vertically downward from both sides of the horizontal passage hole and opening to the outside of the lower surface of the passage portion.

The exhaust passage inlet hole has an edge portion protruding upward, and a valve member operated by the solenoid portion is in close contact with and spaced apart from the protruding end thereof to be opened and closed.

The relief valve is inserted into the relief valve installation hole formed between the pair of vertical flow path holes.

The relief valve installation hole is formed in a direction orthogonal to the horizontal flow path hole.

The relief valve includes a spring that contracts in response to a pressure exceeding the normal use range, a movable spring support member elastically supported by the spring, a valve member mounted on the movable spring support member, and an inlet of the relief valve installation hole It includes an inlet member installed on the side and formed through a second inlet hole, and the second inlet hole is opened and closed by a valve member mounted on the movable spring support member.

A relief hole is formed through the relief valve installation hole from a position corresponding to the inner end of the inlet member to the outside of the lower surface of the flow path.

Both the first inlet hole and the second inlet hole are located inside the inlet passage connecting the installation hole of the exhaust control valve and the inner passage of the air suspension system, and both the vertical passage hole and the relief hole connect the installation hole and the atmosphere. It is located inside the connecting exhaust channel.

The solenoid part and the flow path part have a cylindrical shape, and the relief valve does not protrude outside the outer peripheral surface of the flow path part.

According to the present invention as described above, since the exhaust control valve and the relief valve are integrated into one valve, there is an effect that the inspection and assembly man-hours of these valves are reduced.

In addition, since only one integrated exhaust control valve can be inserted or removed into the installation hole of the valve mounting portion, assembly and replacement work can be facilitated.

In addition, since the exhaust control valve and the relief valve share one flow path, the flow path structure is simplified.

In addition, there is an effect of facilitating diagnosis of the cause in case of malfunction of the suspension system.

1 is a perspective view of an exhaust control valve of an electronically controlled air suspension system according to the present invention.
2 is a perspective view of the exhaust control valve viewed from below.
3 is a cross-sectional view taken along line AA of FIG. 2, a front cross-sectional view of the exhaust control valve.
4 is a cross-sectional view taken along line BB of FIG. 2, a side cross-sectional view of the exhaust control valve, and a cross-sectional view having a rotation angle difference of 90° with respect to FIG. 3.
5 is a diagram illustrating an installation state of the exhaust control valve.
6 is an exhaust operation state diagram when the system internal pressure is in the normal working pressure range.
7 is a view showing the relationship between the relief valve and the flow path installed inside the exhaust control valve.
8 is a diagram illustrating an operating state of the relief valve.

In the present invention, various modifications may be made and various embodiments may be provided, and specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to a specific embodiment, it is to be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention. The thickness of the lines or the size of components shown in the accompanying drawings may be exaggerated for clarity and convenience of description.

In addition, terms to be described later are terms defined in consideration of functions in the present invention and may vary according to the intentions or precedents of users and operators. Therefore, definitions of these terms should be made based on the contents throughout the present specification.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figs. 1 and 2, the exhaust control valve of the electronically controlled air suspension system according to the present invention largely includes a solenoid part 10 in the upper part and a flow path part 20 in the lower part, and as a whole, one cylinder It consists of a shape so that it can be easily inserted and removed in the installation hole.

A cover 30 and a connector 31 integrally formed on the solenoid unit 10 are mounted. A pair of mounting flanges 30a with bolt holes are formed in the cover 30, and the exhaust control valve is inserted into the installation hole, and then bolted to the valve mounting portion (for example, the housing of the air compressor) in which the installation hole is formed. It can be fixed with. The connector 31 is connected to another connector provided at an end of an electric wire that supplies operating power to the coil 11 (see FIG. 3) installed inside the solenoid unit 10.

In the solenoid unit 10, components that form magnetic force to drive the valve are built in, and a flow path for air exhaust is formed in the flow path unit 20 and a relief valve 40 is installed. Regarding the cylindrical shape of the exhaust control valve according to the present invention described above, the relief valve 40 is completely embedded in the flow path part 20 so that there is no external, that is, a part protruding to the outside of the cylindrical valve body. Accordingly, it is easy to insert or remove the exhaust control valve into a simple circular installation hole.

The flow path part 20 has a first inlet hole 21 formed on the outer circumferential surface thereof. A plurality of first inflow holes 21 are formed at the same height and at the same interval along the outer peripheral surface of the flow path part 20. A relief valve installation hole 22 is formed below the outer circumferential surface of the flow path part 20, and the relief valve 40 is inserted into the relief valve installation hole 22. A lattice-shaped rib 23 is formed on the outer circumferential surface of the flow path 20 for reducing the amount of material and weight and reinforcing strength.

Looking at the bottom (bottom) of the flow path part 20, an exhaust hole through which air is discharged during a normal exhaust operation (that is, the vertical flow path hole 27 in FIG. 3) and the relief valve 40 are released to release excess pressure. It can be seen that the exhaust hole (that is, the relief hole 29 of FIG. 4) is formed.

As shown in Figure 3, the inside of the solenoid unit 10, the coil 11 for generating a magnetic field, and the coil 11 is installed in the hollow inside the wound bobbin and operated in the axial direction by magnetic force ( 3) an armature 12, a spring 13 that elastically supports the armature 12 in the opposite direction of the operation direction, and a rod 14 coupled to one end of the armature 12 and operated integrally. , A valve member 15 installed at an end of the rod 14 to open and close the exhaust passage inlet hole 25 and a core 16 for concentrating magnetic flux are installed to support one end of the spring 13.

Therefore, when current is supplied to the coil 11, the armature 12 moves upward while compressing the spring 13, and the rod 14 moves upward together with the armature 12, and thus the exhaust flow path The valve member 15 is separated from the inlet hole 25 to open the exhaust passage inlet hole 25.

Conversely, when the current supply to the coil 11 is stopped, the spring 13 is restored to its original state and pushes the armature 12 downward, so that the valve member 15 moves to the original position and blocks the exhaust passage inlet hole 25 Is done.

The flow path part 20 is coupled and mounted to the lower part of the solenoid part 10 in an airtight state. The airtight coupling structure, as shown in FIG. 3, may be a structure in which an edge portion of the upper end of the flow path part 20 is inserted into the coupling groove at the lower end of the solenoid part 10, and seals are installed between both coupling surfaces.

A chamber 24, which is a downwardly concave space, is formed in the upper portion of the flow path 20, and the first inflow holes 21 are formed in a portion of the wall surrounding the chamber 24.

The exhaust passage inlet hole 25 is formed through downward from the center of the bottom surface of the chamber 24, and the rim portion protrudes upward in the shape of a circular boss, so that the valve member 15 is in close contact with and spaced apart from the end thereof. It is opened and closed.

A horizontal flow path hole 26 horizontally crossing the center of the flat section (radial center) of the flow path part 20 is formed below the exhaust flow path inlet hole 25. The horizontal channel hole 26 is formed in a direction from the outside of the outer circumferential surface of one side of the channel part 20 to the inside, the inner end is blocked by the wall surface of the channel part 20, and the outer end is blocked by inserting and mounting a cap 28 .

The exhaust passage inlet hole 25 and the horizontal passage hole 26 communicate with each other.

Vertical flow path holes 27 are formed downward in each portion of the horizontal flow path hole 26 at the same distance in both directions from the central portion thereof. The pair of vertical flow path holes 27 are parallel to each other, the upper end communicates with the horizontal flow path hole 26, and the lower end is opened to the outside of the flow path part 20 through the lower surface of the flow path part 20.

Meanwhile, the relief valve installation hole 22 is formed horizontally between the pair of vertical flow path holes 27, and when viewed from a plan view of the flow path part 20, the horizontal flow path hole 26 and the relief valve installation hole ( 22) has a rotation angle difference of 90° (intersected at right angles to each other).

The relief valve 40 inserted into the relief valve installation hole 22 includes a fixed spring support member 41, a spring 42, a movable spring support member 43, a valve member 44, and an inlet member 45. Include.

The fixed spring support member 41 and the movable spring support member 43 have a cylindrical cup shape and receive and support one end of the spring 42, respectively.

The fixed spring support member 41 is supported on the wall surface at one end side of the relief valve installation hole 22 to maintain a fixed state while supporting one end of the spring 42.

The spring 42 is inserted between the fixed spring support member 41 and the movable spring support member 43 and supported at both ends thereof. At this time, the fixed spring support member 41 is omitted as shown in FIGS. 7 and 8, and the support of the spring 42 is a relief valve installation hole 22 that is reduced to a diameter of a size capable of holding the spring 42 without flow. The inner end of the may be substituted.

The valve member 44 is mounted on one side of the movable spring support member 43.

A cylindrical inlet member 45 serving as a valve seat is inserted into the inlet portion of the relief valve installation hole 22, and a second inlet hole 46 is formed through the inlet member 45. In addition, the inlet member 45 does not protrude outside the outer circumferential surface of the flow path part 20.

In a normal state in which no abnormal pressure above the working pressure is generated in the air compressor, the movable spring support member 43 is pushed toward the inlet member 45 by the elastic force of the spring 42, and is placed between the fixed spring support member 41 A flow gap of a predetermined distance is formed, and at this time, the valve member 44 installed on the movable spring support member 43 is in close contact with the inner end of the inlet member 45 to maintain a state in which the second inlet hole 46 is blocked. .

In addition, the relief valve installation hole 22 and the flow path part are located in the lower part of the channel part 20 at the inner end of the inlet member 45, that is, at a position where the valve member 44 is in close contact to block the second inflow hole 46. The relief hole 29 for communicating the outer space of the lower surface of (20) is formed.

FIG. 5 is a schematic diagram of an exhaust flow path of an air suspension system as an installation state diagram of the exhaust control valve.

The exhaust control valve is inserted and installed in the installation hole 51 formed in the valve mounting part 50. The valve mounting part 50 may be, for example, a housing of an air compressor.

An inflow passage 52 communicating with one side of the installation hole 51 and an exhaust passage 53 communicating with the lower side of the installation hole 51 are formed inside the valve mounting part 50. The inflow passage 52 is connected to an internal passage of the air suspension system, and the exhaust passage 53 is connected to the atmosphere.

Each of the seals 60 and 61 are installed on the upper and lower edges of the exhaust control valve, and are in close contact with the upper and lower walls of the installation hole 51, so that the inlet flow path ( 52) and the exhaust passage 53 are kept tight.

The entire flow path part 20 of the exhaust control valve is located in the space of the inflow path 52 so that the first inflow hole 21 and the second inflow hole 46 share the inflow path 52. That is, the compressed air inside the inflow passage 52 always flows into the passage part 20 of the exhaust control valve through both the first inlet hole 21 and the second inlet hole 46.

When the normal working pressure is acting on the internal flow path of the air suspension system, the compressed air is exhausted only by the operation of the solenoid part 10 of the exhaust control valve. That is, the spring 42 of the relief valve 40 is designed to have an elastic strength capable of contracting in response to the occurrence of an abnormal overpressure in the air compressor.

Therefore, normally, when current is supplied to the coil 11 under the control of the ECU, the armature 12 and the rod 14 rise, and the valve member 15 is moved from the exhaust passage inlet hole 25 as shown in FIG. By being separated from each other, the compressed air in the inflow passage 52 passes through the first inlet hole 21, the chamber 24, the exhaust passage inlet hole 25, the horizontal passage hole 26, and the vertical passage hole 27. 53) (see Fig. 3 at the same time), and finally discharged into the atmosphere through the exhaust passage 53. By repeating this process, the internal pressure of the air suspension system can be normally adjusted within the operating pressure range.

On the other hand, when abnormal excessive pressure occurs in the air compressor and the internal pressure of the system exceeds the normal working pressure range, the pressure acts on the relief valve 40 through the second inlet hole 46.

7 and 8, compressed air acts on the valve member 44 through the second inlet hole 46 of the inlet member 45, and the spring 42 exceeds the normal working pressure range. Since it has the strength to contract when pressure is applied, the valve member 44 and the movable spring support member 43 move while compressing the spring 42 to open the second inlet hole 46.

Therefore, the compressed air is discharged to the exhaust passage 53 below the passage part 20 through the relief hole 29, and is discharged to the atmosphere along the exhaust passage 53, so that abnormal excess pressure formed in the system can be resolved. do.

As described above, in the exhaust control valve of the electronically controlled air suspension system according to the present invention, the relief valve is installed in the flow path part 20 of the exhaust control valve to form one valve, thereby reducing the number of valve inspection and assembly man-hours. have.

In addition, the exhaust control valve according to the present invention not only incorporates the existing exhaust control valve and the relief valve into one valve, but also externally resembles the shape of the existing exhaust control valve of a simple cylindrical shape without a protrusion to the outside of the outer peripheral surface. By holding it, it is easy to insert or remove into the installation hole 51 provided in the air compressor, and assembling and replacement work is facilitated.

In addition, in the exhaust control valve according to the present invention, the first inlet hole 21 for conventional exhaust control and the second inlet hole 46 for discharging the abnormal excessive pressure share the same inlet passage 52, The vertical flow path hole 27 for conventional exhaust control and the relief hole 29 for discharging the abnormal excess pressure share the same exhaust flow path 53, thereby simplifying the exhaust flow path structure of the air suspension system. In other words, unlike the prior art, it is not necessary to separately form the flow path of the relief valve, so that the structure of the exhaust flow path of the air suspension system is simplified.

In addition, the exhaust control valve according to the present invention is caused by one valve (exhaust control valve according to the present invention) having a cause in the case of malfunction of the air suspension system, general exhaust control operation failure, and relief operation failure. Diagnosis and maintenance becomes easy.

On the other hand, in order to secure the space for installing the relief valve 40 in the flow path part 20, the relief valve installation hole 22 is formed in the center of the flow path part 20, that is, crossing the center point on the plane of the flow path part 20. It is advantageous to be formed in position. However, due to the structural characteristics of the solenoid part 10 located above the flow path part 20, the exhaust flow path inlet hole 25 must be formed in the center of the plane of the flow path part 20 (the solenoid part 10 is basically This is because it has a cylindrical structure surrounded by the coil 11, and movable parts such as armature 12, rod 14, and valve member 15 are arranged on the central axis of the cylindrical structure).

Therefore, when the exhaust flow path inlet hole 25 is extended downward as it is, interference with the relief valve 40 occurs, and thus it cannot be opened to the lower surface of the flow path part 20.

Accordingly, the present invention forms a horizontal flow path hole 26 having a length outside the diameter range of the relief valve installation hole 22 in plan view between the exhaust flow path inlet hole 25 and the relief valve installation hole 22. , Both side portions of the horizontal passage hole 26 were communicated to the outer space under the lower surface of the passage portion 20 via a pair of vertical passage holes 27.

Therefore, by forming the relief valve installation hole 22 in a direction having a 90° rotation angle difference with respect to the horizontal flow path hole 26 between a pair of vertical flow path holes 27, it is possible to secure the installation space of the relief valve 40. The exhaust control valve according to the present invention overcomes the above limiting conditions and communicates the exhaust passage inlet hole 25 formed in the radial center of the passage part 20 to the outer space below the passage part 20. You can make it.

In addition, the exhaust flow path in the flow path part 20 as described above consists of a pair of the latter part of the flow path, that is, two flow paths (vertical flow path holes 27), and the total cross-sectional area is increased, thereby reducing the exhaust resistance, thereby reducing the exhaust function. As well as being made more smoothly, there is an effect of reducing exhaust noise.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, but this is only exemplary, and various modifications and equivalent other embodiments are provided from those of ordinary skill in the field to which the technology belongs. You will understand that it is possible. Therefore, the true technical protection scope of the present invention should be determined by the following claims.

10: solenoid part 11: coil
12: amateur 13: spring
14: rod 15: valve member
16: core 20: euro part
21: first inlet hole 22: relief valve installation hole
23: lattice rib 24: chamber
25: exhaust passage inlet hole 26: horizontal passage hole
27: vertical flow hole 28: cap
29: relief hole 30: cover
30a: mounting flange 31: connector
40: relief valve 41: fixed spring support member
42: spring 43: movable spring support member
44: valve member 45: inlet member
46: second inlet hole 50: valve mounting portion
51: installation hole 52: inflow passage
53: exhaust flow path 60, 61: sealing

Claims (9)

A solenoid unit including a coil, an armature operated when power is supplied to the coil, and a valve member interlocked with the armature;
A flow path part coupled to a lower portion of the solenoid part, a flow path formed therein by the valve member to discharge compressed air having a pressure within a normal use range through the flow path;
It is installed inside the flow path part, operates independently regardless of the operation of the solenoid part, and discharges compressed air having a pressure exceeding the normal use range through a separate flow path different from the flow path opened and closed by the solenoid part. Relief valve;
Exhaust control valve of the electronically controlled air suspension system comprising a. The method according to claim 1,
The flow path opened and closed by the valve member operated by the solenoid part includes a plurality of first inflow holes formed on the upper side of the flow path part, a chamber communicating with the first inflow hole, and an exhaust flow path inlet hole formed downward from the center of the chamber. And, a horizontal passage hole connected to the lower end of the exhaust passage inlet hole, and a pair of vertical passage holes extending vertically downward from both sides of the horizontal passage hole and opening to the outside of the lower surface of the passage portion. Exhaust control valve. The method according to claim 2,
The exhaust flow path inlet hole is an exhaust control valve of an electronically controlled air suspension system, characterized in that an edge portion is formed to protrude upward, and a valve member operated by the solenoid unit is in close contact with and spaced apart from the protruding end thereof to open and close. The method according to claim 2,
The relief valve is an exhaust control valve of an electronically controlled air suspension system, wherein the relief valve is inserted into a relief valve installation hole formed between the pair of vertical flow path holes. The method of claim 4,
The relief valve installation hole is an exhaust control valve of an electronically controlled air suspension system, characterized in that formed in a direction orthogonal to the horizontal flow path hole. The method of claim 4,
The relief valve includes a spring that contracts in response to a pressure exceeding the normal use range, a movable spring support member elastically supported by the spring, a valve member mounted on the movable spring support member, and an inlet of the relief valve installation hole It is installed on the side and includes an inlet member through which a second inlet hole is formed,
The second inlet hole is an exhaust control valve of the electronically controlled air suspension system, characterized in that the opening and closing by a valve member mounted on the movable spring support member. The method of claim 6,
An exhaust control valve of an electronically controlled air suspension system, wherein a relief hole is formed through the relief valve installation hole from a position corresponding to an inner end of the inlet member to an outer lower surface of the flow path. The method of claim 7,
Both the first inlet hole and the second inlet hole are located inside the inlet passage connecting the installation hole of the exhaust control valve and the inner passage of the air suspension system, and both the vertical passage hole and the relief hole connect the installation hole and the atmosphere. An exhaust control valve of an electronically controlled air suspension system, characterized in that located inside an exhaust passage to be connected. The method according to claim 1,
The exhaust control valve of an electronically controlled air suspension system, wherein the solenoid part and the flow path part have a cylindrical shape, and the relief valve does not protrude outside the outer peripheral surface of the flow path part.

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