KR20120103865A - Check valve of hydraulic break system - Google Patents

Check valve of hydraulic break system Download PDF

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Publication number
KR20120103865A
KR20120103865A KR1020110021773A KR20110021773A KR20120103865A KR 20120103865 A KR20120103865 A KR 20120103865A KR 1020110021773 A KR1020110021773 A KR 1020110021773A KR 20110021773 A KR20110021773 A KR 20110021773A KR 20120103865 A KR20120103865 A KR 20120103865A
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KR
South Korea
Prior art keywords
valve
valve housing
check valve
ball
brake system
Prior art date
Application number
KR1020110021773A
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 KR1020110021773A priority Critical patent/KR20120103865A/en
Priority to DE201210005392 priority patent/DE102012005392B4/en
Priority to US13/416,634 priority patent/US8684029B2/en
Priority to CN2012100639232A priority patent/CN102700540A/en
Publication of KR20120103865A publication Critical patent/KR20120103865A/en

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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

PURPOSE: A check valve of a brake system is provided to secure assembly reliability and reduce weight and size by simplifying shape and manufacturing costs through common pressing process and increase the reliability for assembling. CONSTITUTION: A check valve of a brake system comprises a valve housing(110), a ball(120), a spring(125), and a valve seat(130). The valve housing is coupled with the stepped portion(2b) of a hydraulic block(2) and comprises an oil flow passage(112). The valve housing accommodates a front end(110a), a middle end(110b), a rear end(110c), and a flange(110d). The front end is tapered and the diameter of the front end is smaller than that of the middle end. The middle end is formed to accommodate the ball and the spring. The rear end is tapered and the diameter of the front end is larger than that of the middle end. The diameter of the flange is bent for the expansion of the diameter. The ball is coupled with the hydraulic block and opens and closes the inner oil passage. The spring supports the ball elastically. The valve seat guides the spring and assembled with the valve housing. The valve seat comprises an oil hole passing through the center portion.

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 is smaller in diameter than the suspension and is tapered at the tip and extends from the tip. The valve seat includes a suspension having a cylindrical shape and having a predetermined length so that a ball and a spring can be embedded therein, a rear end extending in diameter while stepped out of the suspension, and a flange bent so as to extend in a circumferential direction from the rear end. It has an outer diameter that matches the inner diameter of the rear end of the valve housing to press-fit the rear end of the valve housing. It has an oil hole penetrating the inside.

In addition, the perforated block of the check valve of the brake system according to the present invention further comprises an outer step, the outer step is fixed by pressing and deforming the flange of the valve housing pressed into the inner step.

Further, in the check valve of the check valve of the brake system according to the present invention, both the flange front of the valve housing and the rear of the valve seat are supported by the perforated block.

The check valve of the brake system according to the present invention has a valve housing having a diameter smaller than that of the suspension and having a tapered tip, a suspension extending from the tip, having a cylindrical shape, and having a predetermined length so that a ball and a spring may be embedded therein, A rear end of which the diameter is extended from the rear end, and a flange that is bent to extend the diameter in the circumferential direction from the rear end, and the valve seat has an outer diameter that matches the inner diameter of the rear end of the valve housing so as to be press-fitted to the rear end of the valve housing. Since the shape is simplified to have an oil hole penetrating through, the size and weight are reduced, and a general press working is possible, thereby lowering the manufacturing cost and increasing workability.

In addition, in the check valve of the brake system according to the present invention, both the front of the flange of the valve housing and the rear of the valve seat are supported by the perforated block, so that the check valve can be easily fixed and assembled, thereby increasing assembly reliability.

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.

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 released completely.

3 is a view illustrating 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 112 formed therein, and a valve housing 110. The valve seat is built in the ball 120 for opening and closing the inner oil passage 112, the spring 125 for elastically supporting the ball 120, and the valve seat for guiding the spring 125 and assembled with the valve housing 110 ( 130).

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 which forms the oil flow path is stepped stepwise from the inner side and is expanded in diameter, 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 is provided in a cylindrical shape such as a bullet. For example, the valve housing 110 is relatively smaller in diameter than the other part (intermediate end) and has a tapered tip 110a and an extension from the tip 110a to have a cylindrical shape and a ball 120 and a spring 125 therein. Suspension 110b having a predetermined length to be embedded therein, and a rear end 110c having a diameter stepped from the suspension 110b and a flange 110d bent to extend in diameter in a circumferential direction from the rear end 110c. do. 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 oil passage 112 is formed by penetrating the front end 110a, the middle stop 110b, the rear end 110c, and the flange 110d in the longitudinal direction.

The valve seat 130 is manufactured by cold forging, and is provided to be coupled to the rear end 110a of the valve housing 110 and simultaneously supported to the stepped portion 2b of the hole block 2. To this end, the valve seat 130 is provided with a cylindrical seat body having an outer diameter that matches the inner diameter of the rear end (110c) to be press-installed in the rear end (110c) of the valve housing (110). The valve seat 130 has an oil hole 130a therein.

The ball 120 installed inside the valve housing 110 opens and closes the through hole of the valve housing tip 110a, and the spring 125 is interposed between the ball 120 and the front end of the valve seat 130. .

After the ball valve 120, the spring 125, and the valve seat 130 are assembled to the valve housing 110 as described above, the check valve 100 is pushed to the stepped portion 2b of the hole block 2. As shown in an enlarged view of FIG. 3, the rear end 110c of the valve housing 110 may be moved to the outer step portion 2c positioned outside the flange 110d of the valve housing 110 using an assembling toll (not shown). It is fixed to the hole block 2 by pressure deformation so that it may wrap.

Therefore, the check valve 100 of the present embodiment is to facilitate the manufacturing process by changing the shape of the valve housing 110 and the valve seat 130, and further the flange 110d of the valve housing 110 and the valve seat 130 ) And both sides of the back) are supported by the hole block 2, so that the check valve 100 can be easily fixed and assembled.

2..Perforation block 2b .. Internal step
2c..External step 100..Check valve
110.Valve housing 110d. Flange
120. Ball 125. Spring
130..valve seat 130a.oil hole

Claims (3)

A valve housing 110 press-fitted to the stepped portion 2b of the hydraulic block 2 and having an oil passage 112 formed therein, and built into the valve housing 110 to open and close the internal oil passage 112. In the check valve of the brake system comprising a ball 120, 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 a diameter smaller than that of the stop 110b and has a tapered tip 110a and a cylindrical shape extending from the tip 110a and having a ball 120 and a spring 125 therein. A stop 110b having a predetermined length, a rear end 110c extending in diameter while stepped from the stop 110b, and a flange 110d bent to extend in a circumferential direction from the rear end 110c,
The valve seat 130 is a check valve of a brake system having an outer diameter that matches the inner diameter of the rear end (110c) to be press-installed in the rear end (110c) of the valve housing 110 and has an oil hole penetrating the inside. The method of claim 1,
The hole block 2 further includes an outer stepped portion 2c, and the outer stepped portion 2c fixes and fixes the flange 110d of the valve housing 110 press-fitted into the stepped portion 2b. Check valve of the brake system. 3. The method according to claim 1 or 2,
The check valve is a check valve of a brake system in which both the front of the flange (110d) of the valve housing (110) and the rear of the valve seat (130) are supported by the hole block (2).
KR1020110021773A 2011-03-11 2011-03-11 Check valve of hydraulic break system KR20120103865A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020110021773A KR20120103865A (en) 2011-03-11 2011-03-11 Check valve of hydraulic break system
DE201210005392 DE102012005392B4 (en) 2011-03-11 2012-03-09 Shut-off valve for hydraulic brake system
US13/416,634 US8684029B2 (en) 2011-03-11 2012-03-09 Check valve of hydraulic brake system
CN2012100639232A CN102700540A (en) 2011-03-11 2012-03-12 Check valve of hydraulic brake system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110021773A KR20120103865A (en) 2011-03-11 2011-03-11 Check valve of hydraulic break system

Publications (1)

Publication Number Publication Date
KR20120103865A true KR20120103865A (en) 2012-09-20

Family

ID=47111654

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020110021773A KR20120103865A (en) 2011-03-11 2011-03-11 Check valve of hydraulic break system

Country Status (1)

Country Link
KR (1) KR20120103865A (en)

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