KR20120103863A - Check valve of hydraulic break system - Google Patents

Check valve of hydraulic break system Download PDF

Info

Publication number
KR20120103863A
KR20120103863A KR1020110021771A KR20110021771A KR20120103863A KR 20120103863 A KR20120103863 A KR 20120103863A KR 1020110021771 A KR1020110021771 A KR 1020110021771A KR 20110021771 A KR20110021771 A KR 20110021771A KR 20120103863 A KR20120103863 A KR 20120103863A
Authority
KR
South Korea
Prior art keywords
valve
check valve
valve housing
brake system
press
Prior art date
Application number
KR1020110021771A
Other languages
Korean (ko)
Inventor
이충재
Original Assignee
주식회사 만도
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 만도 filed Critical 주식회사 만도
Priority to KR1020110021771A priority Critical patent/KR20120103863A/en
Publication of KR20120103863A publication Critical patent/KR20120103863A/en

Links

Images

Classifications

    • 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
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • B60T13/14—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using accumulators or reservoirs fed by pumps
    • B60T13/142—Systems with master cylinder
    • B60T13/145—Master cylinder integrated or hydraulically coupled with booster
    • 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
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
    • 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
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
    • 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
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/04—Arrangements of piping, valves in the piping, e.g. cut-off valves, couplings or air hoses
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/04—Check valves with guided rigid valve members shaped as balls
    • F16K15/044—Check valves with guided rigid valve members shaped as balls spring-loaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0209—Check valves or pivoted valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0245—Construction of housing; Use of materials therefor of lift valves with ball-shaped valve members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/81—Braking systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Check Valves (AREA)
  • Regulating Braking Force (AREA)

Abstract

A check valve of a brake system is provided to simplify the structure and to facilitate manufacture and assembly. The check valve of the brake system according to the present invention is press-fitted to the stepped portion of the hydraulic block and the valve housing which forms an oil passage therein, a ball built into the valve housing to open and close the internal oil passage, and elastically supporting the ball. A check valve of a brake system comprising a spring and a valve seat for guiding the spring and coupled to the valve housing, wherein the valve housing has a small path therein and an oil passage having a valve face and a large path therein and circumferentially to the outside. The valve seat is provided with a protruding locking portion, and the valve seat has an oil hole provided at the center side, a first inner diameter portion that is bent from the oil hole and supports a spring therein, and an inner step of the locking portion with a diameter extending from the first inner diameter portion. It is provided to include a second inner diameter portion press-fitted to the side wall and a third inner diameter portion press-fitted to the bottom of the inner step Were the size and weight bar because they have a simple shape as a usual press-forming is possible to lower the manufacturing cost increased workability. In addition, the check valve of the brake system according to the present invention improves the assembly reliability of the check valve by supporting both the front end of the valve housing and the rear of the seat tail of the valve seat in the perforated block.

Description

Check Valve of Hydraulic Break System

The present invention relates to a check valve of a brake system, and more particularly, to provide a check valve of a brake system to simplify the structure to facilitate processing and assembly.

Vehicles are equipped with a brake system for braking. Recently, various kinds of systems have been proposed for obtaining a stronger and more stable braking force. An example of a brake system is an anti-lock brake system (ABS) that prevents wheel slippage during braking and a brake traction control system (BTCS) that prevents slippage of drive wheels during rapid start or acceleration of the vehicle. Traction Control System) and a vehicle dynamic control system (VDC) for stably maintaining driving conditions by controlling brake hydraulic pressure by combining anti-lock brake system and traction control.

The electronically controlled brake system includes a plurality of solenoid valves for controlling braking hydraulic pressure delivered to a hydraulic brake side mounted on a wheel of a vehicle, a pair of low pressure accumulators and high pressure accumulators for temporarily storing oil discharged from the hydraulic brakes, It includes a motor and pump for forcibly pumping oil in the low pressure accumulator, a plurality of check valves for preventing the reverse flow of oil, an ECU for controlling the solenoid valve and the driving of the motor, and these components are made of aluminum. It is compactly built into the manufactured hydraulic block.

1 is a cross-sectional view showing a check valve used in a conventional electronically controlled brake system. For example, the check valve installed in the flow path between the suction side of the pump and the low pressure accumulator blocks oil from the master cylinder side from being transferred to the low pressure accumulator side, and at the same time, the oil at the wheel cylinder side is pumped when the pump is driven by the motor. It serves to prevent the inflow to the suction side.

As shown in the drawing, the check valve 1 is a valve housing 3 press-fitted to the hydraulic block 2 on which the oil flow passage 2a is formed, and is built in the valve housing 3 to open and close the internal oil passage 3a. A ball 4, a spring 5 for elastically supporting the ball 4 toward the oil passage 3a, and a spring seat 6 for guiding the spring 5 and assembled to the valve housing 3; do.

By the way, the conventional check valve (1) described above was complicated in appearance and difficult to assemble because only the functionality was considered in manufacturing. In particular, in the case of the valve housing (2) has a disadvantage that the manufacturing cost is expensive because the shape is complicated, as the product size is large and can be produced only by cutting, spring seat (6) is only in the valve housing (3) Since it is press-fitted, there is a problem in that assembly reliability is lowered when used for a long time.

SUMMARY OF THE INVENTION The present invention has been made in view of the above prior art, and an object of the present invention is to provide a check valve of a brake system for simplifying the structure to facilitate manufacturing and assembly.

The check valve of the brake system according to the present invention for achieving the above object is press-fitted to the stepped portion of the hydraulic block and the valve housing to form an oil passage therein, a ball built into the valve housing to open and close the inner oil passage; A check valve of a brake system comprising a spring for elastically supporting a ball and a valve seat for guiding the spring and coupled to the valve housing, wherein the valve housing has a small path and a valve surface, and an oil consisting of a medium path and a large path. It is provided with a passage and protruding in the circumferential direction on the outside is provided with a locking portion that is press-fitted to the inner step of the hole block, the valve seat is provided in a plate shape having an oil hole in the center side is press-fitted to the large path.

In addition, the large path of the valve housing of the check valve of the brake system according to the present invention is further provided with a stepped outward step, the stepped to cock the valve seat coupled to the large path.

In addition, the hole block of the check valve of the brake system according to the present invention further comprises an outer step portion, the outer step portion is fixed by pressing the outer edge of the locking portion of the valve housing pressed into the inner step portion.

The check valve of the brake system according to the present invention has a valve housing having an oil passage consisting of a small path and a valve surface and a medium path and a large path therein and protruding in the circumferential direction to be press-fitted into the inner step of the hole block. The valve seat has a locking part, and the valve seat is formed in a plate shape having an oil hole at the center thereof to be press-fitted to a large path, thereby simplifying the shape, thereby reducing the size and weight, and making a normal press work, thereby reducing manufacturing costs. Lowered and increased processability.

In addition, the check valve of the brake system according to the present invention improves the assembly reliability of the check valve by supporting both the front end of the valve housing and the rear of the seat tail of the valve seat in the perforated block.

1 is a view illustrating a check valve of a conventional brake system.
2 is a diagram illustrating a brake system in which a check valve according to an embodiment of the present invention is used.
3 is a view illustrating a check valve of a brake system according to an embodiment of the present invention.
4 is a valve housing plan view of a check valve of a brake system according to an embodiment of the present invention.

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

First, prior to explaining the check valve of the brake system according to an embodiment of the present invention, a brief description will be given of the brake system in which the check valve of the present invention is used.

2 shows a conventional brake system. The electronically controlled brake system includes a brake pedal 10 that accepts a driver's operating force, a brake booster 11 that doubles the pedal effort by using a pressure difference between vacuum pressure and atmospheric pressure by the pedal pedal force of the brake pedal 10, and the brake. A first cylinder for connecting the master cylinder 20 to generate pressure by the booster, and the first port 21 of the master cylinder 20 and two wheel brakes (or wheel cylinders) 30 to control hydraulic pressure transmission. A second hydraulic circuit 40B for connecting the hydraulic circuit 40A, the second port 22 of the master cylinder 20, and the remaining two wheel brakes 30 to control hydraulic pressure transmission is provided. The first hydraulic circuit 40A and the second hydraulic circuit 40B are compactly installed in the hydraulic block (not shown).

The first hydraulic circuit 40A and the second hydraulic circuit 40B are solenoid valves 41 and 42 for controlling braking hydraulic pressure transmitted to two wheel brakes 30, respectively, and the wheel brake 30. A pump 44 for sucking and pumping oil from the oil or master cylinder 20 discharged from the side, a low pressure accumulator 43 for temporarily storing the oil exiting the wheel brake 30, and the pump 44 Orifice 46 for reducing pressure pulsation from the hydraulic pressure being pumped, and auxiliary flow path (48a) for guiding the oil of the master cylinder 20 to be sucked into the inlet of the pump 44 in the TCS mode.

A plurality of solenoid valves 41 and 42 are associated with upstream and downstream sides of the wheel brakes 30, which are normally open solenoid valves disposed upstream of each wheel brake 30 and kept open in a normal state. 41 and a normal closed solenoid valve 42 disposed downstream of each wheel brake 30 and kept in a normally closed state. The opening and closing operation of the solenoid valves 41 and 42 is controlled by an electronic control unit (ECU; not shown) that detects the vehicle speed through a wheel speed sensor disposed at each wheel side, and is normally closed according to decompression braking. The solenoid valve 42 is opened and the oil exiting from the wheel brake 30 side is temporarily stored in the low pressure accumulator 43.

The pump 44 is driven by a motor 45 and sucks the oil stored in the low pressure accumulator 43 and discharges the oil to the side of the orifice 46 to transfer the hydraulic pressure to the wheel brake 30 side or the master cylinder 20 side.

In addition, a normal open solenoid valve 47 (hereinafter referred to as TC valve) for traction control control (TCS) is installed in the main flow passage 47a connecting the outlet of the master cylinder 20 and the pump 44. The TC valve 47 is normally kept open so that the braking hydraulic pressure generated in the master cylinder 20 during normal braking through the brake pedal 10 is transmitted to the wheel brake 30 through the main flow passage 47. do.

In addition, the auxiliary flow passage 48a is branched from the main flow passage 47 to guide the oil of the master cylinder 20 to be sucked to the inlet side of the pump 44, where the oil flows only to the inlet of the pump 44. The shuttle valve 48 is provided. The electrically operated shuttle valve 48 is installed in the middle of the auxiliary flow path 48a and normally closes and operates to open in the TCS mode.

In addition, the brake booster 11 is provided with a pressure sensor 51 for detecting the vacuum and atmospheric pressure of the brake booster 11, and is applied to the front wheel left and right wheels FL, FR and the rear wheel left and right wheels RL and RR. A wheel pressure sensor 51 for detecting the actual braking pressure is provided. These pressure sensors 50 and 51 are electrically connected to and controlled by the electronic control unit.

The braking action of the hydraulic brake system for a vehicle according to the present invention configured as described above is as follows.

First, the driver depresses the brake pedal 10 to decelerate the vehicle while the vehicle is running or in a stopped state, or to maintain the stopped state. Accordingly, the boosting force amplified than the input is formed in the brake booster 11, and the braking hydraulic pressure of considerable pressure is generated in the master cylinder 20 through the backing force. The generated braking hydraulic pressure is transmitted to the front wheels FR and FL and the rear wheels RR and RL through the solenoid valves 41 to perform a braking action. Then, when the driver releases little or completely from the brake pedal 10, the oil pressure in each wheel brake is returned to the master cylinder 20 through the solenoid valves 41 and 42 to reduce the braking force or to apply the braking action. This is completely released.

3 and 4 illustrate a check valve of a brake system according to an embodiment of the present invention. Although the check valve 100 of this embodiment is provided in the suction side of the low pressure accumulator 43 and the pump 44 in FIG. 2, this invention is not limited to this.

As shown in the drawing, the check valve 100 of the present embodiment is press-fitted to the hydraulic block (see 2 in FIG. 1) and has a valve housing 110 and an oil passage 112a to 112c formed therein, and a valve housing ( Ball 120, which is built in 110 to open and close the inner oil passage (112a ~ 112c), spring 125 for elastically supporting the ball 120, guides the spring 125 and assembled with the valve housing 110 The valve seat 130 is included.

First, the hydraulic block 2 in which the check valve 100 is installed has a hollow bore 2a therein to form an oil flow path. The bore 2a forming the oil flow path is expanded in diameter while being stepped stepwise from the inside, and has an inner stepped portion 2b and an outer stepped portion 2c. The check valve 100 of this embodiment is provided between the inner stepped portion 2b and the outer stepped portion 2c.

The valve housing 110 has a hollow (oil passage 112) therein and is provided in a cylindrical shape. The oil passage 112 includes a small path 112a, a valve surface 112b, a medium path 112c, and a large path 112d. The ball 120 is disposed on the inclined valve surface 112b, the spring 125 is disposed along the longitudinal direction of the medium path 112c, and the valve seat 130 is coupled to the large path 112d. The locking portion 114 protrudes in the circumferential direction on the outside of the valve housing 110. The inner edge of the locking portion 114 is press-fitted to the inner stepped portion 2b of the hole block 2, and the outer edge is coupled to the outer stepped portion 2c of the hole block 2. The valve housing 110 can be manufactured at a low cost such as pressing or forging by simplifying the shape of the valve housing 110.

The valve seat 130 has a plate shape having an oil hole 130a at the center side as shown in the drawing, and is press-fitted to the large path 112d of the valve housing 110. 4 is a plan view of the valve housing 110, the stepped portion 112e which is located outside the large path 112d to secure the coupling between both ends of the valve seat 130 and the large path 112d of the valve housing 110. ) To the end of the valve seat 130 using an assembly tool (not shown). Caulking (or pressure molding) is preferably manufactured to be spaced apart appropriately at intervals of about 120 degrees, as shown rather than the entire step (112e). The cocked part (caulking part 112f) slightly protrudes toward the large path 112d.

Ball 120 is provided in contact with the valve face 112b of the valve housing 110 as described above, the spring 125 is the valve housing 110 to press the ball 120 to the small path (112a) side It is supported by the middle portion 112c and the valve seat 130 of.

As described above, the check valve 100, in which the ball 120, the spring 125, and the valve seat 130 are assembled in the valve housing 110, may be connected to the valve housing 110 to the inner stepped portion 2b of the hole block 2. After pushing the locking portion 114 of the), as shown in FIG. 3, an external stepped portion 2c positioned outside the locking portion 114 of the valve housing 110 using an assembling toll (not shown). Is pressurized and deformed so as to surround the locking portion 114, it is stably fixed to the hole block (2).

Therefore, the check valve 100 of the present embodiment simplifies the manufacturing process by simplifying the shape of the valve housing 110 and the valve seat 130, and further the front and rear of the engaging portion 114 of the valve housing 110. Supporting from both sides facilitates fixing and assembling of the check valve 100. In addition, the valve seat 130 is coupled to the valve housing 110 by pressing and caulking in parallel to improve the assembly reliability.

2..Perforation block 2b .. Internal step
2c..outer step 100..check valve
110. Valve housing 112a.
112c..Middle and Gyeongbu 112d ..
112e .. Step 112f .. Caulking part
114..Hanging 120..Ball
125. Spring 130. Valve seat
130a..Oil ball

Claims (3)

A valve housing 110 press-fitted to the internal step 2b of the hydraulic block 2 and forming an oil passage therein, and a ball 120 embedded in the valve housing 110 to open and close the internal oil passage; In the check valve of the brake system comprising a spring 125 for elastically supporting the ball 120, and a valve seat 130 for guiding the spring 125 and coupled to the valve housing 110,
The valve housing 110 has an oil passage 112 consisting of a small path 112a, a valve face 112b, a medium path 112c, and a large path 112d therein, and protrudes in the circumferential direction. It has a locking portion 114 is press-fitted to the inner stepped portion 2b of the hole block 2,
The valve seat 130 is provided in a plate shape having an oil hole (130a) in the center side, check valve of the brake system is press-fitted to the large path (112d). The method of claim 1,
The large path 112d of the valve housing 110 further includes a step 112e outward, and the step 112e checks a brake system for cocking the valve seat 130 coupled to the large path 112d. valve. 3. The method according to claim 1 or 2,
The hole block 2 further includes an outer stepped portion 2c, and the outer stepped portion 2c pressurizes an outer edge of the engaging portion 114 of the valve housing 110 press-fitted into the inner stepped portion 2b. The check valve of the brake system to deform and fix.
KR1020110021771A 2011-03-11 2011-03-11 Check valve of hydraulic break system KR20120103863A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110021771A KR20120103863A (en) 2011-03-11 2011-03-11 Check valve of hydraulic break system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110021771A KR20120103863A (en) 2011-03-11 2011-03-11 Check valve of hydraulic break system

Publications (1)

Publication Number Publication Date
KR20120103863A true KR20120103863A (en) 2012-09-20

Family

ID=47111652

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020110021771A KR20120103863A (en) 2011-03-11 2011-03-11 Check valve of hydraulic break system

Country Status (1)

Country Link
KR (1) KR20120103863A (en)

Similar Documents

Publication Publication Date Title
KR101197467B1 (en) Hydraulic break system
KR101187196B1 (en) Hydraulic break system
KR101196892B1 (en) Hydraulic break system
US9139184B2 (en) Brake system
JP5608230B2 (en) Automotive hydraulic unit pump housing having at least one main cylinder connection opening
KR20150125274A (en) Hydraulic break system
US20120227837A1 (en) Check valve of hydraulic brake system
US8684029B2 (en) Check valve of hydraulic brake system
US8998350B2 (en) Pressure damping device for brake system
JP2004075052A (en) Hydraulic unit for vehicle brake device
KR20130089368A (en) Check valve of hydraulic break system
KR20120103866A (en) Check valve of hydraulic break system
KR101250760B1 (en) Check Valve of Hydraulic break system
KR101237320B1 (en) Check Valve of Hydraulic break system
KR20120103862A (en) Check valve of hydraulic break system
KR20120103863A (en) Check valve of hydraulic break system
KR20120108143A (en) Check valve of hydraulic break system
KR102613628B1 (en) Check Valve of Hydraulic Brake System
US20150145322A1 (en) Pressure damping device for brake system
KR101365020B1 (en) Check valve of hydraulic break system
KR101323570B1 (en) Check valve of hydraulic break system
KR20120103865A (en) Check valve of hydraulic break system

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application