KR101198747B1 - Valve for brake system - Google Patents

Abstract

The brake system valve according to the present invention is installed in a modulator block having a master cylinder flow path and a wheel cylinder flow path to control oil flow between the master cylinder flow path and the wheel cylinder flow path, and the oil of the wheel cylinder flows into the master cylinder flow path. A bypass flow path connecting the master cylinder flow path and the wheel cylinder flow path so that it can be operated, and a check valve that opens the bypass flow path only when the oil flows from the wheel cylinder to the master cylinder flow path. A valve body spaced apart from or close to the valve seat provided at the cylinder flow path to open and close the bypass flow passage, a connection portion extending from the valve body to pass through the bypass flow passage, and provided at the wheel cylinder flow path side of the bypass flow passage. With a wing portion provided at the end of the connection portion to be caught in the locking portion The features. The valve for the brake system according to the present invention is a check valve for opening and closing the bypass flow passage is made of a structure that is easy to handle by the operator, the assembly can be made smoothly and the assembly time can be shortened.

Brake System, Valve, Bypass Euro, Check Valve

Description

Valve for brake system

The present invention relates to a valve for a brake system, and more particularly, to a valve for a brake system that is installed in the modulator block to control the flow of oil between the master cylinder and the wheel cylinder.

In general, the electronically controlled brake system is to effectively prevent wheel slippage that may occur during vehicle braking, rapid start, or rapid acceleration, and includes a plurality of valves for controlling braking hydraulic pressure transmitted from the master cylinder to the wheel cylinder. An accumulator for temporarily storing oil discharged from the wheel cylinder, an oil pump for recovering oil discharged from the wheel cylinder to the master cylinder, and an electronic control unit (ECU) for controlling the operation of the valve and the oil pump. . The valve, the accumulator and the oil pump are installed in an aluminum modulator block having a flow path for forming a hydraulic circuit.

The valve, which is connected to the modulator block and controls the flow of oil, shuts down the flow path and opens a flow path when a current is applied, and a normal closes the flow path when the current is applied, while closing the flow path. There are two types of open (NO).

An example of a normal open valve is disclosed in US Patent No. 6,347,844 (registered on Feb. 19, 2002).

The brake system valve disclosed in the above publication includes a lower valve housing press-fitted to the modulator block so as to be interposed between the master cylinder flow passage and the wheel cylinder flow passage, an upper valve housing coupled to an upper portion of the lower valve housing, and an upper valve housing. It includes a sleeve coupled to the upper portion, the armature is installed to move up and down inside the sleeve, and the flow path opening and closing device is installed in the lower valve housing to control the flow of oil between the master cylinder flow path and the wheel cylinder flow path. The flow path opening and closing device includes components such as a valve seat having an orifice, a valve member for opening and closing the orifice, and a spring for elastically supporting the valve member.

In addition, one side of the lower housing is provided with a bypass flow path connecting the master cylinder flow path and the wheel cylinder to bypass the oil of the master cylinder flow path to the wheel cylinder flow path, and the bypass flow path is opened and closed by a ball type check valve. do. The ball type check valve is in close contact with the valve seat provided in the bypass flow path when oil flows from the master cylinder to the wheel cylinder, and seals the bypass flow path. On the contrary, when the oil flows from the wheel cylinder to the master cylinder, the valve seat Open the bypass passage away from the unit. When the bypass flow path is opened, the wheel cylinder flow path and the master cylinder flow path are connected so that the oil of the wheel cylinder flows smoothly to the master cylinder.

However, in the conventional brake system valve as described above, in order to smoothly flow the oil of the wheel cylinder toward the master cylinder, the check valve for opening and closing the bypass flow passage connecting the master cylinder flow passage and the wheel cylinder flow passage is made of a ball type. Hard to assemble That is, the ball-type check valve is difficult to hold by the operator and can be easily rolled and moved, requiring great caution when assembling the valve and increasing assembly time.

In addition, the conventional ball-type check valve has a problem that it is difficult to seal the bypass flow path stably because the contact force with the valve seat portion is small.

The present invention is to solve the problems as described above, to provide a brake system valve having a check valve that is easy to handle the operator to facilitate the assembly work, and tightly close to the valve seat so as to seal the flow path stably. There is a purpose.

The brake system valve according to the present invention for achieving the above object is installed in a modulator block having a master cylinder flow path and a wheel cylinder flow path to control the flow of oil between the master cylinder flow path and the wheel cylinder flow path, the wheel cylinder A bypass flow path connecting the master cylinder flow path and the wheel cylinder flow path so that the oil may flow into the master cylinder flow path, and the check to open the bypass flow path only when oil flows from the wheel cylinder to the master cylinder flow path. And a check valve includes a valve body which opens and closes the bypass flow path to be spaced apart from or close to a valve seat provided on the master cylinder flow path side of the bypass flow path, and the bypass flow path from the valve body. A connecting portion extending to penetrate through the bypass passage; To take a locking part provided in the machine wheel cylinder side passage it is characterized by comprising a blade provided in the connecting end.

Here, the wing portion may be elastically deformed to allow the wing portion to pass through the bypass passage when the check valve is assembled.

And, the end of the wing is provided with a handle that can be grasped by the user, the handle can be separated from the wing after completion of assembly.

In addition, a sealing member may be provided on the outside of the valve body in close contact with the valve seat to seal the bypass passage.

In addition, the wing portion may be provided so that a plurality of the spaced apart from each other so that the oil of the wheel cylinder flow path smoothly flows into the bypass flow path even when caught by the locking portion.

The valve for the brake system according to the present invention has a check valve for opening and closing the bypass flow path between the master cylinder flow path and the wheel cylinder flow path is made of a structure that is easy for the operator to handle, the assembly can be made smoothly and the assembly time can be shortened. Can be.

In addition, the valve for the brake system according to the present invention has a structure in which the check valve is in close contact with the valve seat portion, so that the sealing efficiency to the bypass flow path is good.

Hereinafter, with reference to the accompanying drawings will be described a valve for a brake system according to an embodiment of the present invention.

1 is a side cross-sectional view illustrating a state in which a valve for a brake system according to an embodiment of the present invention is coupled to a modulator block.

As shown in FIG. 1, the brake system valve 21 according to an embodiment of the present invention includes a wheel connected to a master cylinder passage 12 and a wheel cylinder (not shown) connected to a master cylinder (not shown). A first valve housing 22 press-fitted to the modulator block 11 so as to be disposed between the cylinder flow passages 13, and a first valve housing 22 coupled to the first valve housing 22 to cover an upper portion of the first valve housing 22. A valve seat 31 provided in the second valve housing 25 and having an orifice 32 for communicating the valve housing 25 with the master cylinder flow passage 12 and the wheel cylinder flow passage 13; A valve member 33 installed on the second valve housing 25 so as to be movable up and down to open and close the 32, first and second plungers 34 and 35 for moving the valve member 33, and The armature 38 and the master cylinder flow path 12 for smoothly recovering the oil of the wheel cylinder to the master cylinder. And a bypass passage 41 for connecting the cylinder passage 13, a check valve 51 for opening and closing the bypass passage 41.

The first valve housing 22 has an open upper portion and communicates with the master cylinder passage 12. The oil may flow only from the wheel cylinder passage 13 toward the master cylinder passage 12. The bypass passage 41 for communicating the master cylinder passage 12 and the wheel cylinder passage 13 to each other is provided. The first main flow passage 23 extends to the open upper portion of the first valve housing 22. A first filter 24 is disposed between the first main flow path 23 and the master cylinder flow path 12 to filter foreign matter contained in the oil. The second valve housing 25 is coupled to the open upper portion of the first valve housing 22.

The second valve housing 25 covers the upper portion of the first valve housing 22, and a portion of the upper portion protrudes out of the modulator block 11. The second valve housing 25 includes a second main passage 26 connected to the wheel cylinder passage 13 and a first valve chamber 27 for communicating the first main passage 23 and the second main passage 26. ). Therefore, the oil introduced into the first main passage 23 from the master cylinder passage 12 may flow into the second main passage 26 through the first valve chamber 27. A second filter 28 is disposed between the second main flow passage 26 and the wheel cylinder flow passage 23 to filter foreign matter. The first valve chamber 27 is provided with a valve seat 31 having an orifice 32 and a valve member 33 for opening and closing the orifice 32.

The valve seat 31 is installed inside the first valve chamber 27, and the orifice 32 provided in the valve seat 31 communicates the first valve chamber 27 with the first main flow path 23. . The orifice 32 is opened and closed by a valve member 33 installed in the first valve chamber 27 so as to be movable up and down. The valve member 33 has a ball shape and is installed below the first plunger 34.

The first plunger 34 receives an external force from the second plunger 35, and the second plunger 35 receives an external force from the armature 38 that is movably installed on the upper portion of the second valve housing 25. Between the first plunger 34 and the valve seat 31, a first return spring 36 for returning the first plunger 34 upward is provided, and the first plunger 34 and the second plunger ( Between the 35, a second return spring 37 for returning the second plunger 35 in the upward direction is provided.

The armature 38 is actuated by an electromagnetic force to exert an external force on the second plunger 35. The armature 38 is installed inside the sleeve 39 that is coupled to the top of the first valve housing 22. Although not shown, a coil for generating an electromagnetic field is installed around the sleeve 39. When power is applied to the coil, the armature 38 descends by the electromagnetic force and exerts an external force on the second plunger 35, whereby the valve member 33 moves the orifice 32 while the first plunger 34 descends. Seal it.

The check valve 51 is installed in the second valve chamber 42 provided in the lower portion of the first valve housing 22 so as to be able to open and close the bypass flow passage 41. The second valve chamber 42 is provided at one lower side of the first valve housing 22 to communicate the master cylinder passage 12 and the bypass passage 41. The check valve 51 contacts the valve seat portion 43 provided on the master cylinder flow passage 12 side of the bypass flow passage 41 to seal the bypass flow passage 41 and when the check valve 51 falls from the valve seat portion 43. The pass passage 41 is opened. A locking portion 44 is provided on the wheel cylinder passage 13 side of the bypass passage 41. In addition, a third valve chamber 45 communicating with the bypass flow passage 41 is provided between the first valve housing 22 and the second valve housing 25 adjacent to the locking portion 44. The valve chamber 45 and the wheel cylinder passage 13 communicate with each other through a clearance passage 46 provided between the first valve housing 22 and the second valve housing 25. Therefore, the oil of the wheel cylinder passage 13 flows to the master cylinder passage 12 through the clearance passage 46, the third valve chamber 45, the bypass passage 41, and the second valve chamber 42. Can be.

As shown in FIGS. 2 and 3, the check valve 51 includes a valve body 52 having a width larger than that of the bypass flow passage 41 so as to seal the bypass flow passage 41, and the valve body. A connecting portion 53 extending from the 52, a plurality of wing portions 54 provided at the end of the connecting portion 53, a handle portion 55 provided at the end portion of the wing portion 54, and a valve body ( It includes a sealing member 56 surrounding the outside of the 52. Here, the valve body 52, the connecting portion 53, the wing portion 54 and the handle portion 55 may be integrally injection molded, the sealing member 56 through the separate assembly process valve body 52 Is coupled to the outside. Sealing member 56 is made of a material such as rubber or resin capable of elastic deformation.

4A and 4B illustrate a process of assembling the check valve 51.

As shown in FIG. 4A, the check valve 51 is inserted into the bypass passage 41 on the side of the second valve chamber 42 so that the handle portion 55 faces the bypass passage 41. The plurality of vanes 54 may be inserted into the third valve chamber 45 through the bypass passage 41 because the plurality of vanes 54 is larger than the width of the bypass passage 41 but is elastically deformable.

After the vane 54 is inserted into the third valve chamber 45, the handle 55 may be detached from the vane 54, as shown in FIG. 4B. Between the wing portion 54 and the handle portion 55 is provided with a bottleneck portion 57 having a reduced width, the handle portion 55 can be easily separated. In this way, the check valve 51 is provided with a removable handle portion 55, the operator is easy to handle the check valve 51 during assembly work. And, since the handle portion 55 is separated after assembly, the problem that the space of the third valve chamber 45 is reduced does not occur.

Hereinafter, an operation of a valve for a brake system according to an embodiment of the present invention will be described with reference to FIGS. 1 and 5.

As shown in FIG. 1, when the master cylinder is operated, oil of the master cylinder flows into the first main passage 23 through the master cylinder passage 12. The oil introduced into the first main flow passage 23 flows into the first cylinder chamber 27 through the open orifice 32 and then flows through the second main flow passage 26 to the wheel cylinder flow passage 13.

Thus, while the oil of the master cylinder passage 12 flows to the wheel cylinder passage 13 through the first main passage 23 and the second main passage 26, the second valve chamber ( The oil flows into 42 and the pressure of the second valve chamber 42 increases. At this time, the check valve 51 is in close contact with the valve seat 43 to seal the bypass passage 41. Thus, no flow of oil through the bypass passage 41 occurs.

Meanwhile, although not shown, when power is applied to the coil installed outside the sleeve 39, the armature 38 descends by the electromagnetic force and presses the second plunger 35 and the first plunger 34. At this time, the valve member 33 blocks the orifice 32 to block the flow of oil through the orifice 32. Even while the flow of oil through the orifice 32 is blocked, the check valve 51 is in close contact with the valve seat 43 so that the flow of oil through the bypass flow passage 41 is not generated.

When the power applied to the coil is cut off and the pressure of the master cylinder flow path 12 drops, the first plunger 34 moves upward by the elastic force of the first return spring 36. At this time, as shown in FIG. 5, the oil in the wheel cylinder passage 13 flows into the first valve chamber 27 through the second main passage 26 and the pressure in the first valve chamber 27 increases. Thus, the valve member 33 is separated from the valve seat 31. When the orifice 32 is opened in this way, the oil of the wheel cylinder passage 13 is transferred to the master cylinder passage through the second main passage 26, the first valve chamber 27, the orifice 32, and the first main passage 23. Recovered to (12).

In addition, when the pressure of the master cylinder flow path 12 drops, the pressure of the second valve chamber 42 also drops, so that the check valve 51 drops from the valve seat portion 43. At this time, the oil of the wheel cylinder passage 13 flows into the third valve chamber 45 through the clearance passage 46 and then passes between the plurality of wing portions 54 and enters the bypass passage 41. The oil flowing into the bypass passage 41 is recovered to the master cylinder passage 12 through the second valve chamber 42. In this way, the oil of the wheel cylinder passage 13 flows into the master cylinder passage 12 through the bypass passage 41 as well as the first and second main passages 26, so that oil is recovered smoothly and quickly.

The brake system valve 21 according to the present invention described above has a structure in which the check valve 51 for opening and closing the bypass passage 41 has a structure that is easy for the operator to operate. It is easier to assemble than the valve 21 for the system, and the assembly time can be shortened.

In addition, the check valve 51 has a structure that can be in close contact with the valve seat portion 43, the sealing efficiency of the bypass passage 41 is improved compared to the conventional.

1 is a side cross-sectional view illustrating a state in which a valve for a brake system according to an embodiment of the present invention is coupled to a modulator block.

2 and 3 are a side view and a plan view schematically showing the check valve of the valve for the brake system shown in FIG.

4A and 4B are side cross-sectional views illustrating a process of assembling a check valve of a valve for a brake system according to an embodiment of the present invention.

5 is an enlarged side sectional view showing a part of a valve for a brake system according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

11 ... Modulator block 12 ... Master cylinder euro

13 ... wheel cylinder euro 21 ... valve for brake system

22,25 ... 1,2 valve housings 23,26 ... 1,2 main euros

27, 42, 45 ... 1,2,3 valve chamber 31.Valve seat

32 orifice 33 valve element

34,35 ... 1,2 plungers 36,37 ... 1,2 return springs

38 ... amateur 39 ... sleeve

41 ... bypass passage 43 ... valve seat

44. engaging part 51 ... check valve

52 Valve body 53 Connection

54 Wings 55 Handle part

56 ... sealing member 57 ... handle

Claims (5)

A brake system valve mounted on a modulator block having a master cylinder flow path and a wheel cylinder flow path, the valve for brake system controlling oil flow between the master cylinder flow path and the wheel cylinder flow path, A bypass flow path connecting the master cylinder flow path and the wheel cylinder flow path so that the oil of the wheel cylinder flow path flows into the master cylinder flow path, and the bypass only when oil flows from the wheel cylinder flow path to the master cylinder flow path. And a check valve for opening a flow path, wherein the check valve includes: a valve body for opening and closing the bypass flow path to be spaced apart from or close to a valve seat provided at the master cylinder flow path side of the bypass flow path; A connecting portion extending to penetrate the bypass passage, and a wing portion provided at an end portion of the connecting portion so as to be caught by a locking portion provided at the wheel cylinder passage side of the bypass passage. The wing portion is a valve for a brake system, characterized in that the plurality of spaced apart from each other so that the oil in the wheel cylinder flow path smoothly flows into the bypass flow path even when caught by the engaging portion. The method of claim 1, And the wing portion is elastically deformable so that the wing portion can pass through the bypass passage when the check valve is assembled. The method of claim 1, The end of the wing is provided with a handle that can be gripped by the user, the handle is a brake system valve, characterized in that the assembly can be separated from the wing. The method of claim 1, A valve for a brake system, characterized in that the outer surface of the valve body is provided with a sealing member in close contact with the valve seat to seal the bypass flow path. delete

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