KR101196891B1 - Solenoid valve for brake system - Google Patents

Solenoid valve for brake system Download PDF

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Publication number
KR101196891B1
KR101196891B1 KR1020080037637A KR20080037637A KR101196891B1 KR 101196891 B1 KR101196891 B1 KR 101196891B1 KR 1020080037637 A KR1020080037637 A KR 1020080037637A KR 20080037637 A KR20080037637 A KR 20080037637A KR 101196891 B1 KR101196891 B1 KR 101196891B1
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KR
South Korea
Prior art keywords
sleeve
armature
valve
plunger
solenoid valve
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Application number
KR1020080037637A
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Korean (ko)
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KR20090111995A (en
Inventor
황용석
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주식회사 만도
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Priority to KR1020080037637A priority Critical patent/KR101196891B1/en
Publication of KR20090111995A publication Critical patent/KR20090111995A/en
Application granted granted Critical
Publication of KR101196891B1 publication Critical patent/KR101196891B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
    • B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
    • B60T8/363—Electromagnetic valves specially adapted for anti-lock brake and traction control systems in hydraulic systems

Abstract

A solenoid valve for a brake system is disclosed that makes the change of magnetic force with respect to the current appear linear, making it easier to control, minimizing the performance change due to assembly tolerances, and improving the mountability by reducing the length of the valve. do. The disclosed solenoid valve includes a valve housing having a through hole penetrating in the longitudinal direction; A valve seat installed in the valve housing and having an orifice; A plunger installed to retract in the valve housing for opening and closing of the orifice; A cylindrical sleeve coupled to an outer surface of the valve housing and closed at an opposite side thereof; An arm mounted to retract in the sleeve for pressurizing the plunger; First and second magnetic bodies respectively fixed to the inner surface of the sleeve around the armature and spaced apart from each other by a predetermined distance in the direction of movement of the armature; A restoring spring installed in the sleeve to press the armature toward the plunger; And an excitation coil assembly installed outside the sleeve.

Description

Solenoid Valve for Brake System {SOLENOID VALVE FOR BRAKE SYSTEM}

The present invention relates to a solenoid valve for a brake system, and more particularly, to a solenoid valve for a brake system which can be manufactured more easily than before and can reduce manufacturing costs.

A general vehicle anti-lock brake system senses the slip of the wheel and controls the braking pressure applied to the wheel to prevent the wheel from locking up during braking. This ensures safe braking by ensuring that the wheels do not slip during braking.

The brake system includes a plurality of solenoid valves for opening and closing the flow path of the brake hydraulic line for controlling the braking pressure. The solenoid valves include a normally open solenoid valve that normally maintains an open state, and a normally closed solenoid valve that normally maintains a closed state.

Figure 1 shows a conventional normal closed solenoid valve. The valve is press-fitted into the bore 14 of the modulator block 13 in which the flow paths of the brake system are formed, and a hollow valve housing 1 having an inlet 3 and an outlet 4 for the flow of fluid is formed. Compared.

At one end of the valve housing 1 a cylindrical sleeve 6 is engaged so that the armature 5 installed therein can retract, and the open end of the sleeve 6 is closed at the open end of the sleeve 6. And a valve core 7 for advancing and retracting the armature 5. The amateur 5 opens and closes the orifice 8a of the valve seat 8 through the forward and backward movement. For this purpose, the armature 5 has an opening and closing portion 5a extending toward the valve seat 8 through the hollow portion 2 of the valve housing 1.

Between the armature 5 and the valve core 7 is provided a restoring spring 9 for pressurizing the armature 5 so that the armature 5 can normally close the orifice 8a. The sleeve 6 and the valve core are provided. On the outside of (7), a female coil assembly 10 for advancing and retracting the amateur 5 is provided.

The excitation coil assembly 10 is coupled to a cylindrical coil case 10a, a bobbin 10b installed in the coil case 10a, an excitation coil 10c wound on the bobbin 10b, and a lower portion of the coil case 10a. And a flux ring 10d. The magnetic field generated when power is applied to the excitation coil 10c is formed through the coil case 10a, the valve core 7, the amateur 5, and the flux ring 10d.

When the magnetic field is thus formed, the armature 5 moves toward the valve core 7 to open the orifice 8a of the valve seat 8. Since no magnetic field is formed when no power is applied to the excitation coil 10c, the armature 5 operates to close the orifice 8a by the elasticity of the restoring spring 9.

The solenoid valve described above has a non-linear change in magnetic force due to a change in current applied to the excitation coil because the gap between the armature and the valve core changes when the amateur operates. That is, the gap between the armature and the valve core has a large influence on the magnetic force change. The solenoid valve described above has a nonlinear problem in the change of the magnetic force with respect to the current, as shown in FIG. . In addition, the magnetic force change was large according to the position of the amateur. Since the magnetic force is sensitive to the gap change, the assembly tolerances of the valve core and the amateur are very limited, thus making it difficult to manufacture and increasing the manufacturing cost.

In addition, the aforementioned solenoid valve has a long length of the valve because the amateur and the valve core is arranged in series. As such, if the valve is long, there is a disadvantage in that the volume of the hydraulic control module employing the valve becomes large.

The present invention is to solve such a problem, an object of the present invention is to make the change in the magnetic force with respect to the current linearly easier to control than the conventional brake system to minimize the change in performance due to assembly tolerances To provide a solenoid valve.

Another object of the present invention is to provide a solenoid valve for a brake system which can reduce the length of the valve and improve the mounting performance.

A solenoid valve for a brake system according to the present invention for achieving the above object is a valve housing having a through hole penetrating in the longitudinal direction; A valve seat installed in the valve housing and having an orifice; A plunger installed to retract in the valve housing for opening and closing of the orifice; A cylindrical sleeve coupled to an outer surface of the valve housing and closed at an opposite side thereof; An arm mounted to retract in said sleeve for pressurizing said plunger; First and second magnetic bodies respectively fixed to the inner surface of the sleeve around the armature and spaced apart from each other by a predetermined distance in the direction of movement of the armature; A restoring spring installed in the sleeve to press the armature toward the plunger; And an excitation coil assembly installed outside the sleeve.

The solenoid valve further includes a non-magnetic spacer member interposed therebetween to maintain the gap between the first magnetic body and the second magnetic body.

The first magnetic body, the second magnetic body, and the spacer member have a cylindrical shape having the same inner diameter, and their inner diameter is larger than the outer diameter of the amateur.

The restoration spring has one end supported by the closed end of the sleeve and the other end supported by the armature.

The sleeve includes a protrusion that projects from the closed end side toward the amateur to define the advance and retraction distance of the amateur, and the restoring spring is coupled to the protrusion outer surface.

In the solenoid valve according to the present invention, even when the armature operates, the gap between the armature and the first and second magnetic bodies does not change significantly, so that the magnetic force changes linearly with the change of the current applied to the excitation coil. Therefore, it is easier to control the valve than in the prior art, and the change in the magnetic force due to the change in the position of the amateur is also smaller than the conventional one, thereby ensuring a stable performance.

In addition, the solenoid valve of the present invention has the effect of reducing the overall length of the valve because the first and second magnetic body is disposed around the amateur. Therefore, it is possible to reduce the volume of the hydraulic control module employing it.

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

As shown in FIG. 3, the solenoid valve for the brake system according to the present invention includes a valve housing 20, a valve seat 30, a filter member 40, a plunger 50, an armature 60, and a sleeve 70. And a female coil assembly 80.

The valve housing 20 has a cylindrical shape having a through hole 21 penetrating in the longitudinal direction at the center thereof. The outer surface of the valve housing 20 is provided with a flange portion 22 for fixing the valve housing 20 to the bore 101 inlet side of the modulator block 100. The flange portion 22 is fixed by the deformation of the modulator block 100 when installing the valve.

The valve seat 30 is press-fitted into the through hole 21 of the valve housing 20. The valve seat 30 includes an inner flow passage 31 penetrating in the longitudinal direction and an outer flow passage 32 formed in a groove shape on its outer surface. In addition, a first orifice 33 for opening and closing the flow path is formed on the inner flow path 31.

The filter member 40 surrounds the outer surface and the lower end of the valve housing 20 entering the bore 101 of the modulator block 100. The filter member 40 has a radial side passage 41 in communication with the inflow passage 102 of the modulator block 100, the inner passage 31 of the valve seat 30, and the discharge passage of the modulator block 100 ( It has a central linkage passage 42 in connection with 103. The side flow passage 41 of the filter member 40 is associated with the outer flow passage 32 of the valve seat 30. In the linkage passage 42, an orifice member 43 having a second orifice 43a for rectifying the flow of oil is mounted. In addition, the filter member 40 filters the foreign matter of the oil flowing into the discharge passage 103 through the first filtration unit 44 and the associated passage 42 to filter foreign matters of the oil flowing into the side passage 41. The second filter 45 is included.

The plunger 50 has an outer diameter corresponding to the through hole 21 of the valve housing 20 and is installed to move up and down in the through hole 21. An opening and closing part 51 for opening and closing the first orifice 33 is provided at the lower end of the plunger 50, and a groove-shaped flow path 52 is formed on the outer surface of the plunger 50 so that oil can flow up and down.

The sleeve 70 is cylindrical in shape with the top closed. The sleeve 70 is press-fitted to an outer surface of the valve housing 20 with an open lower portion. The sleeve 70 may be fixed to the valve housing 20 by welding or the like.

The armature 60 is installed in the sleeve 70 so as to pressurize the upper portion of the plunger 50 by the retraction operation. The amateur 60 is made of a magnetic material. In addition, the oil flow path 61 is formed on the outer surface of the amateur 60 so that oil can flow up and down. Between the armature 60 and the upper end of the plunger 50, an intermediate member 62 may be installed to transmit the operation of the armature 60 to the plunger 50. The intermediate member 62 is fixed by being pushed into the through hole 63 in the center of the armature 60, the first connecting portion 62a of the upper portion, the coupling portion of the upper portion of the plunger 50 53) is pressed in and fixed. Although the example of FIG. 3 illustrates an intermediate member 62 connecting the plunger 50 and the amateur 60, this intermediate member 62 is not essential. The top of the plunger 50 may be connected directly to the armature 60.

On the inner surface of the sleeve 70 around the armature 60, cylindrical first magnetic bodies 91 and second magnetic bodies 92 are spaced apart from each other by predetermined intervals. The first magnetic body 91 and the second magnetic body 92 are spaced apart from each other in the moving direction of the amateur (60). And the spacer member 93 made of a non-magnetic material is provided between the first magnetic body 91 and the second magnetic body 92 for such a space. That is, the first magnetic body 91, the second magnetic body 92, and the spacer 93 are all cylindrical in the same inner diameter, and the inner diameter thereof is smaller than the armature 60 to guide the retreat of the armature 60. . The upper end of the first magnetic body 91 is supported toward the closed end 71 of the sleeve 70, and the lower end of the second magnetic body 92 is supported to the upper end of the valve housing 20. Here, the present embodiment shows a case in which the spacer 93 is installed between the first magnetic body 91 and the second magnetic body 92, but the first magnetic body 91 and the second magnetic body 92 are spaced apart from each other ( 93 may be fixed to the upper and lower portions of the inner surface of the sleeve 70, respectively.

Between the closed end 71 of the sleeve 70 and the upper end of the armature 60 is provided a restoring spring 65 for pressing the armature 60 toward the plunger 50. Restoring spring 65 is supported at one end of the closed end 71 of the sleeve 70 and the other end is supported on the top of the armature (60). In addition, the closed end 71 of the sleeve 70 is provided with a projection 72 protruding from the closed end 71 toward the amateur 60 in order to limit the advance and retreat distance of the amateur 60. And the restoring spring 65 is coupled to the outer surface of the projection (72). This is because the restoring spring 65 normally presses the armature 60 toward the plunger 50 so that the opening and closing portion 51 of the plunger 50 can close the first orifice 33.

The retraction distance of the armature 60 in such a valve corresponds to the gap between the protrusion 72 and the top of the armature 60. On the other hand, in the state in which the first orifice 33 is closed by the plunger 50 (initial state), the upper end of the amateur 60 is preferably the same height as the lower end of the first magnetic material 91 or slightly higher than this. This is to ensure a smooth operation of the amateur (60) when the magnetic field is formed by the excitation coil assembly (80).

Excitation coil assembly 80 is provided in a cylindrical shape, is coupled to the outer surface of the sleeve (70). The excitation coil assembly 80 has a cylindrical coil case 81, a bobbin 82 accommodated in the coil case 81, an excitation coil 83 wound around the outer surface of the bobbin 82, and an excitation coil 83 below. And a flux ring 84.

This configuration is such that a magnetic field is formed through the coil case 81, the first magnetic body 91, the amateur 60, the second magnetic body 92, and the valve housing 20 when power is applied to the excitation coil 83. It is. And through this, the amateur 60 is to be raised to open the first orifice 33. That is, the magnetic field through the first magnetic body 91, the armature 60, and the second magnetic body 92 raises the armature 60 so that the plunger 50 rises together with the armature 60 and the first orifice 33. It is to open. When the first orifice 33 is opened in this way, oil flows from the inflow passage 102 toward the discharge passage 103.

When such an operation is made, the solenoid valve according to the present invention has the first and second magnetic bodies 91 and 92 disposed around the armature 60, so even when the armature 60 rises, The spacing between the first and second magnetic bodies 91 and 92 does not change significantly. Therefore, as shown in FIG. 4, the change of the magnetic force according to the change of the current applied to the excitation coil 83 appears linearly. When the change in the magnetic force is linear in this way, the control of the valve becomes easier than in the prior art. In addition, since the change in the magnetic force due to the position of the armature 60 is also smaller than before, it is possible to secure stable performance.

In the solenoid valve of the present invention, since the first and second magnetic bodies 91 and 92 are arranged around the armature 60, the total length of the valve can be reduced. Therefore, it is possible to reduce the volume of the hydraulic control module employing it.

1 is a cross-sectional view of a conventional solenoid valve.

Figure 2 is a graph showing a change in magnetic force according to the current change of the conventional solenoid valve.

3 is a cross-sectional view of the solenoid valve according to the present invention.

4 is a graph showing a change in magnetic force according to the current change of the solenoid valve according to the present invention.

Explanation of symbols on the main parts of the drawings

20: valve housing 30: valve seat

33: first orifice 40: filter member

50: plunger 51: opening and closing part

60: Amateur 65: Restoration Spring

70: sleeve 72: protrusion

80: female coil assembly 91: first magnetic body

92: second magnetic material 93: spacer member

Claims (5)

A valve housing having a through hole penetrating in the longitudinal direction; A valve seat installed in the valve housing and having an orifice; A plunger installed to retract in the valve housing for opening and closing of the orifice; A cylindrical sleeve coupled to an outer surface of the valve housing and closed at an opposite side thereof; An arm mounted to retract in said sleeve for pressurizing said plunger; First and second magnetic bodies respectively fixed to the inner surface of the sleeve around the armature and spaced apart from each other by a predetermined distance in the direction of movement of the armature; A restoring spring installed in the sleeve to press the armature toward the plunger; A female coil assembly installed outside the sleeve, The resilient spring is a solenoid valve for a brake system, characterized in that one end is supported to the closed end of the sleeve and the other end is supported by the amateur. The method of claim 1, Solenoid valve for a brake system, characterized in that it comprises a non-magnetic spacer member interposed therebetween for maintaining the gap between the first magnetic material and the second magnetic material. 3. The method of claim 2, The first magnetic body, the second magnetic body, the spacer member is a cylindrical shape having the same inner diameter each other, their inner diameter is larger than the outer diameter of the amateur solenoid valve for the brake system. delete The method of claim 1, The sleeve includes a protrusion projecting from the closed end side toward the amateur to define an advance of the amateur, The restoring spring is a solenoid valve for a brake system, characterized in that coupled to the outer surface of the projection.
KR1020080037637A 2008-04-23 2008-04-23 Solenoid valve for brake system KR101196891B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080037637A KR101196891B1 (en) 2008-04-23 2008-04-23 Solenoid valve for brake system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080037637A KR101196891B1 (en) 2008-04-23 2008-04-23 Solenoid valve for brake system

Publications (2)

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KR20090111995A KR20090111995A (en) 2009-10-28
KR101196891B1 true KR101196891B1 (en) 2012-11-01

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120088903A (en) * 2011-02-01 2012-08-09 주식회사 만도 Solenoid valve for brake system
KR101988513B1 (en) * 2017-09-11 2019-09-30 주식회사 만도 Solenoid valve for brake control system
KR102005902B1 (en) * 2017-12-28 2019-08-02 주식회사 만도 Solenoid valve for brake system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60215177A (en) 1984-04-09 1985-10-28 Matsushita Electric Ind Co Ltd Self-sustaining type gas shut-off valve
JPH10169822A (en) * 1996-12-06 1998-06-26 Toyota Motor Corp Solenoid valve
JP2004360748A (en) 2003-06-03 2004-12-24 Nissin Kogyo Co Ltd Normally open type solenoid valve
KR100677853B1 (en) * 2005-11-09 2007-02-02 주식회사 만도 Solenoid valve for brake control system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60215177A (en) 1984-04-09 1985-10-28 Matsushita Electric Ind Co Ltd Self-sustaining type gas shut-off valve
JPH10169822A (en) * 1996-12-06 1998-06-26 Toyota Motor Corp Solenoid valve
JP2004360748A (en) 2003-06-03 2004-12-24 Nissin Kogyo Co Ltd Normally open type solenoid valve
KR100677853B1 (en) * 2005-11-09 2007-02-02 주식회사 만도 Solenoid valve for brake control system

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