KR101415203B1

KR101415203B1 - Solenoid valve for electronic brake system

Info

Publication number: KR101415203B1
Application number: KR1020100044703A
Authority: KR
Inventors: 김휘섭
Original assignee: 주식회사 만도
Priority date: 2010-05-12
Filing date: 2010-05-12
Publication date: 2014-08-06
Also published as: KR20110125138A

Abstract

A solenoid valve for an electronically controlled brake system capable of attenuating noise generated in a coil assembly upon power application. The solenoid valve includes a cylindrical bobbin having a plurality of coils wound around an outer periphery thereof, a lead wire fixed to the bobbin and connected to the coil end to guide power supply, a first cylindrical case opened to surround the bobbin, And a second case covering the opening portion of the first case in a state where the bobbin is housed in the first case, wherein the end portion of the first case is staggered vertically so as to attenuate noise generated when the coil is powered on Through holes are formed.

Description

[0001] The present invention relates to a solenoid valve for an electronic brake system,

The present invention relates to a solenoid valve for an electronically controlled brake system, and more particularly, to a solenoid valve for an electronically controlled brake system capable of reducing noise generated in a coil assembly upon power application.

In general, the electronically controlled brake system is a system for efficiently and effectively preventing the slip phenomenon of the vehicle to obtain a strong and stable braking force. Such an electronically controlled brake system includes a plurality of solenoid valves for controlling the braking hydraulic pressure transmitted to the rear brake side of the vehicle, a low pressure accumulator for temporarily storing the oil, a pump for forcibly pumping the oil temporarily stored in the low pressure accumulator, A high pressure accumulator for reducing the pressure pulsation of the oil to be pumped, and an electronic control unit (ECU) for electrically controlling the solenoid valve and the pump drive.

The solenoid valve is provided with a coil assembly that forms an electric field when the coil is wound and the power is applied, and a valve assembly that opens and closes the flow passage by an electric field formed in the coil assembly. The coil assembly is installed in the electronic control unit together with the circuit board and the valve assembly is press-fitted into the aluminum modulator block.

The coil assembly includes a cylindrical bobbin having a coil wound thereon and a case for accommodating the bobbin, wherein the coil assembly forms an electric field when an electric current is applied, thereby causing the valve assembly of the solenoid valve to open or close.

However, in the conventional solenoid valve having the above structure, humming noise may be generated when a current flows through the coil assembly.

Accordingly, it is an object of the present invention to provide a solenoid valve for an electronically controlled brake system capable of reducing noise generated when a current flows through a coil assembly.

In order to accomplish the above object, the solenoid valve for an electronically controlled brake system of the present invention includes a valve assembly having a sleeve having an armature built therein to open and close an orifice, a sleeve assembly including a sleeve, A coil assembly for operating the armature,

Wherein the coil assembly includes: a cylindrical bobbin having a plurality of coils wound around an outer periphery; a lead wire fixed to the bobbin and fixed to the bobbin, the lead wire being connected to the coil end to guide power supply; And a second case covering the opening of the first case with the bobbin being accommodated in the first case,

A through hole is formed at an end of the first case to attenuate noise generated when power is applied to the coil.

The through-hole includes first and second through-holes spaced vertically from each other at an end of the first case.

The first and second through holes are vertically shifted and have overlapping portions.

As described above, the solenoid valve for an electronically controlled brake system according to the present invention includes the first and second through holes, which are vertically shifted from each other at the end of the first case, It is possible to transmit noise to the housing and the circuit board.

1 is a cross-sectional view of an electronically controlled brake system equipped with a solenoid valve of the present invention.
2 is a perspective view showing a solenoid valve of the present invention.
3 is a cross-sectional view of the solenoid valve shown in FIG. 2. FIG.
4 is an enlarged cross-sectional view of part of FIG.

1, an electronically controlled brake system includes an electronic control unit housing 10 provided with a horizontal surface 10a and a wall surface 10b perpendicular to the upper surface and the upper surface of which is opened, A lead wire 73 for electrically connecting the circuit board 20 and the coil assembly 70 to be described later and a cover 30 covering the opening of the electronic control unit housing 10 .

In the electronically controlled brake system having such a configuration, the electronic components in the electronic control unit housing 10 perform overall control of the electronic control room brake system.

A plurality of normally open type and normally close type solenoid valves 50, a pair of pumps (not shown), a low pressure and high pressure accumulator (not shown) and the like are compactly built in the lower portion of the electronic control unit housing 10 (Not shown) to the modulator block 40. As shown in FIG.

The solenoid valve 50 includes a valve assembly 60 having a sleeve 61 in which an armature 62 is built in and out so as to open or close the orifice 63, And a coil assembly 70 for operating the armature 62 with an electromagnetic force.

At this time, the valve assembly 60 is press-fitted into the modulator block 40, and the coil assembly 70 is fixed to the electronic control unit housing 10.

The coil assembly 70 includes a cylindrical bobbin 71 having a plurality of coils 72 wound around the outer periphery thereof as shown in Figs. 2 and 3 and a cylindrical bobbin 71 fixed to an upper portion of the bobbin 71, And a case 75 which is coupled to wrap the bobbin 71. The lead wire 73 is connected to the lead wire 73 to guide power supply.

The bobbin 71 is made of a plastic material through an injection molding process. In the manufacturing process, the lead wire 73 is inserted in the longitudinal direction. A fixing boss 71a is provided on the upper portion of the bobbin 71. The fixing boss 71a is fitted to the horizontal surface 10a of the electronic control unit housing 10 so that the bobbin 71 is securely fixed and the horizontal surface 10a of the electronic control unit housing 10 The upper portion of the coil assembly 70 is seated with sufficient space.

The case 75 includes a first case 76 having a bottom opened to be coupled to the outside of the bobbin 71 so as to cover the outside of the bobbin 71. In a state where the bobbin 71 is received in the first case 76, And a second case 77 covering an opening of one case 76. [

At this time, insertion holes 76a and 77a are formed in the central portion of the upper surface of the first case 76 and the center of the second case 77, respectively, so that the sleeve 61 of the valve assembly 60 passes through. The through holes 71b are symmetrically formed on both sides of the upper surface of the first case 76 so that the fixing bosses 71a can pass therethrough.

Meanwhile, in the present invention, the coil assembly 70 has a structure capable of attenuating humming noise that may be generated when power is applied.

This humming noise attenuating structure is formed through the through hole 80 formed at the end of the first case 76 as shown in Figs. The through hole 80 at this time allows the humming noise generated in the coil assembly 70 to be transmitted to the housing 10 and the circuit board 20 of the electronic control unit.

The through hole 80 includes a first through hole 81 and a second through hole 82. The first through hole 81 and the second through hole 82 at this time are formed as a vertical hole But they are staggered so that only a part of them overlap.

Accordingly, in the present invention, it is possible to prevent the loss of the electromagnetic force of the coil assembly 70 through the first and second through holes 81 and 82 which are staggered and partially overlapped.

That is, the through holes 80 of the present invention are arranged so that the first and second through holes 81 and 82 are staggered from each other, thereby preventing the loss of electromagnetic force at the time of attenuation of the humming noise.

10: electronic control unit housing 20: circuit board
30: cover 40: modulator block
50: solenoid valve 60: valve assembly
61: Sleeve 62: Amateur
63: orifice 70: coil assembly
71: Bobbin 72: Coil
73: lead wire 75: case
76: first case 77: second case
80: Through hole 81: First through hole
82: second through hole

Claims

And a coil assembly (70) for actuating the armature (62) with electromagnetic force formed upon power application, the valve assembly (60) having an armature (62) movable forward and rearward to open and close an orifice (63) In the solenoid valve of the system,
The coil assembly 70 includes a bobbin 71 through which the valve assembly 60 is inserted and inserted through insertion holes 76a and 77a formed at the center of the coil 72 by winding a plurality of coils 72 around the bobbin And a case 75 which surrounds the outside of the insertion holes 76a and 71a and is opened to expose the insertion holes 76a and 77a,
The case 75 is formed with a through hole 80 for attenuating the noise generated when the power of the coil 72 is applied to the surface of the case 75 which is in contact with the electronic control unit housing 10 to which the coil assembly 70 is fixed ,
Wherein the through hole (80) comprises first and second through holes (81, 82) arranged alternately up and down and at least partially overlapped to communicate with each other.

The method according to claim 1,
An upper end of the case 75 is in contact with the electronic control unit housing 10,
Wherein the through hole (80) is provided between the bobbin (71) and the electronic control unit housing (10).

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