KR20120103866A - Check valve of hydraulic break system - Google Patents

Check valve of hydraulic break system Download PDF

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Publication number
KR20120103866A
KR20120103866A KR1020110021774A KR20110021774A KR20120103866A KR 20120103866 A KR20120103866 A KR 20120103866A KR 1020110021774 A KR1020110021774 A KR 1020110021774A KR 20110021774 A KR20110021774 A KR 20110021774A KR 20120103866 A KR20120103866 A KR 20120103866A
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KR
South Korea
Prior art keywords
valve
check valve
valve housing
brake system
oil
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KR1020110021774A
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Korean (ko)
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이충재
이상철
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주식회사 만도
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Priority to KR1020110021774A priority Critical patent/KR20120103866A/en
Publication of KR20120103866A publication Critical patent/KR20120103866A/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
    • 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

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  • 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 increase the assembling reliability of a check valve by using a ball blocking the backflow in a valve housing. CONSTITUTION: A check valve(100) 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 a hydraulic block(2) and comprises an oil flow passage and a latching portion(114). The oil flow passage is composed of a small passage(112a), a valve surface(112b), and a large passage(112c). The ball is comprised in the valve housing and opens and closes an inner oil flow 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(130a), an inner diameter portion(130b), and a flange portion(130c).

Description

브레이크 시스템의 체크 밸브{Check Valve of Hydraulic break system}Check Valve of Hydraulic Break System

본 발명은 브레이크 시스템의 체크 밸브에 관한 것으로서, 더욱 상세하게는 구조를 단순화시켜 가공 및 조립이 용이하도록 한 브레이크 시스템의 체크 밸브를 제공하는 데 있다.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.

차량에는 제동을 위한 브레이크 시스템이 필수적으로 장착되는데, 최근에 보다 강력하고 안정된 제동력을 얻기 위한 여러 종류의 시스템이 제안되고 있다. 브레이크 시스템의 일례로는 제동 시 휠의 미끄러짐을 방지하는 안티록 브레이크 시스템(ABS:Anti-Lock Brake System)과, 차량의 급발진 또는 급가속시 구동륜의 슬립을 방지하는 브레이크 트랙션 제어 시스템(BTCS:Brake Traction Control System)과, 안티록브레이크 시스템과 트랙션 제어를 조합하여 브레이크 액압을 제어함으로써 차량의 주행상태를 안정적으로 유지시키는 차량자세제어 시스템(VDC:Vehicle Dynamic Control System) 등이 있다.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.

이러한 전자제어식 브레이크 시스템은 차량의 휠에 장착된 유압브레이크 측으로 전달되는 제동 유압을 제어하기 위한 다수개의 솔레노이드밸브와, 유압브레이크로부터 빠져나온 오일을 일시 저장하기 위한 한 쌍의 저압어큐뮬레이터 및 고압어큐뮬레이터와, 저압어큐뮬레이터의 오일을 강제 펌핑하기 위한 모터 및 펌프와, 오일의 역방향 흐름을 방지하기 위한 복수의 체크 밸브와, 솔레노이드밸브와 모터의 구동을 제어하기 위한 ECU를 포함하고 있으며, 이러한 구성요소들은 알루미늄으로 제작된 유압 블록에 콤팩트하게 내장되어 있다.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.

도 1은 종래의 전자제어식 브레이크 시스템에 사용되는 체크밸브를 도시한 단면도이다. 일례로 펌프의 흡입측과 저압어큐뮬레이터 사이의 유로에 설치되는 체크밸브는 마스터실린더 측의 오일이 저압어큐뮬레이터측으로 전달되지 않도록 차단함과 동시에, 모터 구동에 의한 펌프의 작동 시 휠 실린더 측의 오일이 펌프의 흡입측으로 유입되는 것을 방지하는 역할을 한다. 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.

도시한 바와 같이 체크 밸브(1)는 오일 유로(2a)가 형성된 유압 블록(2)에 압입 결합되는 밸브하우징(3)과, 이 밸브하우징(3)에 내장되어 내부 오일통로(3a)를 개폐하는 볼(4)과, 볼(4)을 오일통로(3a)측으로 탄성 지지하는 스프링(5)과, 스프링(5)을 가이드하며 밸브하우징(3)에 조립 설치되는 스프링시트(6)를 포함한다. 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.

그런데, 상술한 종래 체크 밸브(1)는 제조 시 기능성만을 고려했기 때문에 외형이 복잡하고 조립이 어려웠다. 특히 밸브하우징(2)의 경우 도시된 바와 같이 형상이 복잡하여 제품 사이즈가 크고 절삭 가공으로만 제작이 가능했기 때문에 제조 비용이 비싸다는 단점이 있었으며, 스프링시트(6)는 밸브하우징(3)에만 압입 결합되기 때문에 장시간 사용 시 조립 신뢰성이 떨어지는 문제점이 있었다.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.

본 발명은 상기 종래 기술에 착안한 것으로서, 본 발명의 목적은 구조를 단순화하여 제조 및 조립이 용이하도록 하기 위한 브레이크 시스템의 체크 밸브를 제공하는 데 있다. 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.

상기 목적을 달성하기 위한 본 발명에 다른 브레이크 시스템의 체크 밸브는 유압 블록의 단차부에 압입 결합되며 내부에 오일통로를 형성하고 있는 밸브하우징과, 밸브하우징에 내장되어 내부 오일통로를 개폐하는 볼과, 볼을 탄성 지지하는 스프링과, 스프링을 가이드하며 밸브하우징에 결합되는 밸브시트를 포함하는 브레이크 시스템의 체크 밸브에 있어서, 밸브하우징은 내부에 소경로와 밸브면과 대경로으로 이루어지는 오일통로를 구비하며 외부에 원주방향으로 돌출 마련되는 걸림부를 구비하고, 밸브시트는 중심측에 마련되는 오일공과, 오일공으로부터 절곡 연장되며 내측에서 스프링을 지지하는 제1내경부와, 제1내경부로부터 직경이 확장되며 걸림부의 내측 단턱 측벽에 압입 결합되는 제2내경부 및 내측 단턱의 바닥에 압입 결합되는 제3내경부를 포함한다.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 an oil passage consisting of a small path and a valve surface and a large path therein. And a locking portion protruding in the circumferential direction on the outside, and the valve seat has an oil hole provided at the center side, a first inner diameter portion which is bent from the oil hole and supports the spring at the inner side, and a diameter from the first inner diameter portion. A second inner diameter portion which is extended and press-fits to the inner stepped side wall of the engaging portion and a third inner press-fits to the bottom of the inner stepped portion It includes the neck.

또한, 본 발명에 다른 브레이크 시스템의 체크 밸브의 상기 유공 블록은 외부 단턱부를 더 포함하고, 상기 외부 단턱부는 내부 단차부에 압입된 밸브하우징의 걸림부 외측 단턱을 가압 변형하여 고정한다. In addition, the perforated block of the check valve of the brake system according to the present invention further includes an outer step, the outer step is fixed by fixing the outer step of the engaging portion of the valve housing pressed into the inner step.

또한, 본 발명에 다른 브레이크 시스템의 체크 밸브는 밸브하우징의 걸림부 전방과 밸브시트의 제3내경부 후방 양측이 유공 블록에 지지된다. In addition, in the check valve of the brake system according to the present invention, both the front of the locking portion of the valve housing and the rear of the third inner diameter portion of the valve seat are supported by the hole block.

본 발명에 따른 브레이크 시스템의 체크 밸브는 밸브하우징은 내부에 소경로와 밸브면과 대경로으로 이루어지는 오일통로를 구비하며 외부에 원주방향으로 돌출 마련되는 걸림부를 구비하고, 밸브시트는 중심측에 마련되는 오일공과, 오일공으로부터 절곡 연장되며 내측에서 스프링을 지지하는 제1내경부와, 제1내경부로부터 직경이 확장되며 걸림부의 내측 단턱 측벽에 압입 결합되는 제2내경부 및 내측 단턱의 바닥에 압입 결합되는 제3내경부를 포함하도록 마련됨으로써 형상을 단순화시켰기 때문에 사이즈 및 무게가 줄었으며, 통상의 프레스 가공이 가능하여 제조 비용을 낮추고 가공성을 높였다. 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 large path therein, and having a locking portion protruding in the circumferential direction to the outside, and a valve seat provided at the center side. An oil ball which is bent from the oil ball, and which extends from the oil ball to support the spring therein, and a diameter of the first inner diameter part which extends from the first inner diameter part, and which is press-fitted to the inner step wall of the locking part and the bottom of the inner step. Since the shape is simplified to include the third inner diameter portion that is press-fitted, the size and weight are reduced, and a general press work is possible, thereby lowering the manufacturing cost and increasing workability.

또한, 본 발명에 따른 브레이크 시스템의 체크 밸브는 밸브하우징의 걸림부 전방과 밸브시트의 제3내경부 후방 양측이 유공 블록에 지지됨으로써 체크 밸브의 고정 및 조립이 용이해져 체크 밸브의 조립 신뢰성을 높일 수 있다. In addition, the check valve of the brake system according to the present invention is supported by both the front of the engaging portion of the valve housing and the rear of the third inner diameter portion of the valve seat in the perforated block to facilitate the fixing and assembling of the check valve, thereby increasing the reliability of assembling the check valve. Can be.

도 1은 종래 브레이크 시스템의 체크 밸브를 도시한 도면이다.
도 2는 본 발명의 일 실시예에 따른 체크 밸브가 사용되는 브레이크 시스템을 도시한 도면이다.
도 3은 본 발명의 일 실시예에 따른 브레이크 시스템의 체크 밸브를 도시한 도면이다.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.

이하, 첨부된 도면을 참조하여 본 발명의 실시예에 대해 설명한다.Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

먼저, 본 발명의 일 실시예에 따른 브레이크 시스템의 체크 밸브를 설명하기에 앞서, 본 발명의 체크 밸브가 사용되는 브레이크 시스템에 대해 간단히 설명하기로 한다.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.

도 2는 통상의 브레이크 시스템을 도시한 도면이다. 전자제어식 브레이크 시스템은 운전자의 조작력을 받아들이는 브레이크 페달(10)과, 이 브레이크 페달(10)의 답력에 의해 진공압과 대기압간의 압력차를 이용해 답력을 배가시키는 브레이크 부스터(11)와, 이 브레이크 부스터에 의해 압력을 발생시키는 마스터실린더(20)와, 이 마스터실린더(20)의 제1 포트(21)와 두 개의 휠 브레이크(또는 휠 실린더)(30)를 연결하여 액압 전달을 제어하는 제1 유압회로(40A)와, 마스터실린더(20)의 제2 포트(22)와 나머지 두 개의 휠 브레이크(30)를 연결하여 액압 전달을 제어하는 제2 유압회로(40B)를 구비한다. 제1 유압회로(40A) 및 제 2 유압회로(40B)는 유압블럭(미도시)에 콤팩트하게 설치된다.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).

제1 유압회로(40A) 및 제2 유압회로(40B)는 각각 두 개씩의 휠 브레이크(30)측으로 전달되는 제동유압을 제어하기 위한 솔레노이드밸브(41)(42)들과, 휠 브레이크(30)측에서 빠져나온 오일 또는 마스터실린더(20)로부터 오일을 흡입하여 펌핑하는 펌프(44)와, 휠 브레이크(30)에서 빠져나오는 오일을 일시 저장하기 위한 저압어큐뮬레이터(43)와, 펌프(44)로부터 펌핑되는 액압으로부터 압력 맥동을 저감시키기 위한 오리피스(46)와, TCS 모드시 마스터실린더(20)의 오일이 펌프(44)의 입구으로 흡입되게 안내하는 보조유로(48a)를 포함하고 있다.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.

다수 개의 솔레노이드밸브(41)(42)는 휠 브레이크(30)의 상류측 및 하류측과 연계되는데, 이것은 각 휠 브레이크(30)의 상류 측에 배치되며 평상시 개방된 상태로 유지되는 노멀 오픈형 솔레노이드밸브(41)와, 각 휠 브레이크(30)의 하류 측에 배치되며 평상시 폐쇄된 상태로 유지되는 노멀 클로즈형 솔레노이드밸브(42)로 구별된다. 이러한 솔레노이드밸브(41)(42)의 개폐작동은 각 휠 측에 배치된 휠 속도센서를 통해 차량속도를 감지하는 전자제어유닛(ECU;미도시)에 의해 제어되며, 감압 제동에 따라 노멀 클로즈형 솔레노이드밸브(42)가 개방되어 휠 브레이크(30)측에서 빠져 나온 오일은 저압어큐뮬레이터(43)에 일시적으로 저장된다.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.

펌프(44)는 모터(45)에 의해 구동되어 저압어큐뮬레이터(43)에 저장된 오일을 흡입하여 오리피스(46)측으로 토출함으로써 액압을 휠 브레이크(30)측 또는 마스터실린더(20)측으로 전달한다.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.

또한, 마스터실린더(20)와 펌프(44)의 출구를 연결하는 메인유로(47a)에는 트랙션 콘트롤 제어(TCS)를 위한 노멀 오픈형 솔레노이드 밸브(47, 이하 TC밸브)가 설치된다. 이 TC밸브(47)는 평상시 개방된 상태를 유지하여, 브레이크페달(10)을 통한 일반 제동시 마스터실린더(20)에서 형성된 제동 액압이 메인유로(47)를 통해 휠 브레이크(30)측으로 전달되도록 한다.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.

또한, 보조유로(48a)는 메인유로(47)에서 분기되어 마스터실린더(20)의 오일을 펌프(44)의 입구 측으로 흡입되게 안내하는 것으로, 여기에는 오일이 펌프(44) 입구로만 흐르도록 하는 셔틀밸브(48)가 설치되어 있다. 전기적으로 작동되는 셔틀밸브(48)는 보조유로(48a)의 중도에 설치되어 평상시 폐쇄되고 TCS 모드시 개방되게 작동한다.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.

또한, 브레이크 부스터(11)에는 브레이크 부스터(11)의 진공압 및 대기압을 감지하는 압력센서(51)가 설치되며, 전륜 좌우측 바퀴(FL, FR)와 후륜 좌우측 바퀴(RL, RR)에는 인가되는 실제 제동 압력을 감지하는 휠 압력센서(51)가 마련된다. 이 압력센서(50,51)들은 전자제어유닛에 전기적으로 연결되어 제어된다. 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.

상기와 같이 구성된 본 발명에 따른 차량용 유압 브레이크 시스템의 제동 작용은 다음과 같다.The braking action of the hydraulic brake system for a vehicle according to the present invention configured as described above is as follows.

먼저, 운전자는 자동차의 주행중이거나 정지상태에서 차량을 감속하거나 정지상태유지를 위해 브레이크 패달(10)을 밟게 된다. 이에 따라 브레이크 부스터(11)에서는 입력보다 증폭된 배력이 형성되고 이 배력을 통해 마스터실린더(20)에서는 상당한 압력의 제동 유압이 발생된다. 발생된 제동 유압은 솔레노이드밸브들(41)을 통해 전륜(FR,FL)과 후륜(RR,RL)에 전달됨으로써 제동 작용이 이루어진다. 그리고, 운전자가 브레이크 패달(10)에서 조금씩 또는 완전하게 발을 떼게 되면, 각 휠 브레이크 내의 오일 압력은 솔레노이드밸브(41,42)를 통해 다시 마스터실린더(20)로 복귀되어 제동력이 감소되거나 제동작용이 완전히 해제된다.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.

도 3은 본 발명의 일 실시예에 따른 브레이크 시스템의 체크 밸브를 도시한 도면이다. 본 실시예의 체크 밸브(100)는 도 2에 있어서 저압어큐뮬레이터(43)와 펌프(44)의 흡입 측에 설치되는 것이지만, 본 발명은 이에 한정되지 않는다. 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.

도시한 바와 같이, 본 실시예의 체크 밸브(100)는 유압 블록(도 1의 2 참조)에 압입 결합되며 내부에 오일통로(112)를 형성하고 있는 밸브하우징(110)과, 밸브하우징(110)에 내장되어 내부 오일통로(112)를 개폐하는 볼(120)과, 볼(120)을 탄성 지지하는 스프링(125)과, 스프링(125)을 가이드하며 밸브하우징(110)과 조립되는 밸브시트(130)를 포함한다. 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).

먼저, 본 체크 밸브(100)가 설치되는 유압 블록(2)은 내부에 중공 보어(2a)를 구비하여 오일 유로를 형성한다. 오일 유로를 형성하는 보어(2a)는 내측으로부터 단계적으로 단차지면서 직경이 확장되며, 내부 단차부(2b)와 외부 단턱부(2c)를 구비한다. 본 실시예의 체크 밸브(100)는 내부 단차부(2b)와 외부 단턱부(2c) 사이에 설치된다.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.

밸브하우징(110)은 내부에 중공(오일통로(112))을 갖는 원통 형태로 마련된다. 오일통로(112)는 소경로(112a)와 밸브면(112b)과 대경로(112c)로 이루어진다. 밸브하우징(110)의 외부에는 원주방향으로 걸림부(114)가 돌출 마련된다. 걸림부(114)는 내측 단턱(114a)과 외측 단턱(114b)을 구비하며, 내측 단턱(114a)은 후술할 밸브시트(130)와 함께 단차부(2b)에 압입 결합된다. 이러한 밸브하우징(110)은 종래보다 형상이 단순화됨으로써 프레스나 단조 등 저렴한 비용으로 제조 가능하다.The valve housing 110 is provided in a cylindrical form having a hollow (oil passage 112) therein. The oil passage 112 includes a small path 112a, a valve surface 112b, and a large path 112c. The locking portion 114 protrudes in the circumferential direction on the outside of the valve housing 110. The locking portion 114 has an inner step 114a and an outer step 114b, and the inner step 114a is press-fitted to the step 2b together with the valve seat 130 to be described later. 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.

밸브시트(130)는 도 3에 도시한 바와 같이 단면이 원뿔대 형상으로 마련된다. 예컨대, 밸브시트(130)는 중심측에 오일공(130a)을 구비하며, 오일공(130a)으로부터 절곡 연장되며 내측에서 스프링(125)을 지지하는 제1내경부(130b)와, 제1내경부(130b)로부터 직경이 확장되며 밸브하우징(110)의 걸림부 내측 단턱(114a)의 측벽에 압입 결합되는 제2내경부(130c) 및 바닥에 압입 결합되는 제3내경부(130d)를 포함한다. The valve seat 130 is provided in a truncated cone shape as shown in FIG. 3. For example, the valve seat 130 has an oil hole 130a at the center side thereof, is bent from the oil hole 130a, and has a first inner diameter portion 130b for supporting the spring 125 therein, and a first inner portion. The diameter extends from the neck portion 130b and includes a second inner diameter portion 130c press-fitted to the side wall of the locking part inner step 114a of the valve housing 110 and a third inner diameter part 130d press-fitted to the bottom. do.

볼(120)은 밸브하우징(110)의 밸브면(112b)에 접촉 마련되며, 스프링(125)은 볼(120)을 소경로(112a) 측으로 가압하는 한편 밸브하우징(110)의 대경로(112c)와 밸브시트(130)의 제1내경부(130b)에 의해 양단이 지지된다. The ball 120 is provided in contact with the valve face 112b of the valve housing 110, and the spring 125 presses the ball 120 toward the small path 112a and the large path 112c of the valve housing 110. And both ends of the valve seat 130 are supported by the first inner diameter portion 130b of the valve seat 130.

상기와 같이 밸브하우징(110)에 볼(120)과 스프링(125)과 밸브시트(130)가 조립된 체크 밸브(100)는 유공 블록(2)의 단차부(2b)까지 밸브시트(130)의 제3내경부(130d)를 밀어 넣은 후, 도 3에 확대 도시한 바와 같이 조립톨(미도시)을 이용하여 밸브하우징(110)의 걸림부(114) 보다 외측에 위치하는 외부 단턱부(2c)가 걸림부(114)를 감싸도록 가압 변형시킴으로써 유공 블록(2)에 고정된다.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, has a valve seat 130 up to the stepped portion 2b of the hole block 2. After pushing the third inner diameter portion 130d of the outer portion, as shown in enlarged in Figure 3 by using an assembling toll (not shown) the outer step portion that is located outside the locking portion 114 of the valve housing 110 ( 2c) is fixed to the hole block 2 by pressure deformation so as to surround the locking portion 114.

따라서, 본 실시예의 체크 밸브(100)는 밸브하우징(110)과 밸브시트(130)의 형상 변경으로 제조 가공이 용이하며, 나아가 밸브하우징(110)의 걸림부(114) 전방과 밸브시트(130)의 제3내경부(130d) 후방 양측이 유공 블록(2)에 지지됨으로써 체크 밸브(100)의 고정 및 조립이 용이해진다. Therefore, the check valve 100 of the present embodiment is easy to manufacture and manufacture by changing the shape of the valve housing 110 and the valve seat 130, and further, the front of the locking portion 114 of the valve housing 110 and the valve seat 130. Both sides of the third inner diameter part 130d of the back side) are supported by the hole block 2 to facilitate fixing and assembling of the check valve 100.

2..유공 블록 2b..내부 단차부
2c..외부 단턱부 100..체크 밸브
110..밸브하우징 114..걸림부
120..볼 125..스프링
130..밸브시트 130a..오일공
130b..제1내경부 130c..제2내경부
130d..제3내경부2..Perforation block 2b .. Internal step
2c..External step 100..Check valve
110. Valve housing 114. Locking part
120. Ball 125. Spring
130..valve seat 130a.oil hole
130b..the first internal diameter 130c..the second internal diameter
130d..3rd internal diameter

Claims (3)

유압 블록(2)의 단차부(2b)에 압입 결합되며 내부에 오일통로를 형성하고 있는 밸브하우징(110)과, 밸브하우징(110)에 내장되어 내부 오일통로를 개폐하는 볼(120)과, 볼(120)을 탄성 지지하는 스프링(125)과, 스프링(125)을 가이드하며 밸브하우징(110)에 결합되는 밸브시트(130)를 포함하는 브레이크 시스템의 체크 밸브에 있어서,
상기 밸브하우징(110)은 내부에 소경로(112a)와 밸브면(112b)과 대경로(112c)로 이루어지는 오일통로(112)를 구비하며, 외부에 원주방향으로 돌출 마련되는 걸림부(114)를 구비하고,
상기 밸브시트(130)는 중심측에 마련되는 오일공(130a)과, 오일공(130a)으로부터 절곡 연장되며 내측에서 상기 스프링(125)을 지지하는 제1내경부(130b)와, 상기 제1내경부(130b)로부터 직경이 확장되며 상기 걸림부(114)의 내측 단턱(114a) 측벽에 압입 결합되는 제2내경부(130c) 및 바닥에 압입 결합되는 제3내경부(130d)를 포함하는 브레이크 시스템의 체크 밸브. A valve housing 110 press-fitted to the stepped portion 2b of the hydraulic block 2 and forming an oil passage therein; 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 including 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 formed of a small path 112a, a valve face 112b, and a large path 112c therein, and a locking part 114 protruding in the circumferential direction. And
The valve seat 130 has an oil hole 130a provided at the center side, a first inner diameter part 130b extending from the oil hole 130a and supporting the spring 125 at an inner side thereof, and the first hole. The diameter extends from the inner diameter portion 130b and includes a second inner diameter portion 130c press-fitted to the side wall of the inner stepped portion 114a of the locking portion 114 and a third inner diameter portion 130d press-fitted to the bottom. Check valve of the brake system. 제 1항에 있어서,
상기 유공 블록(2)은 외부 단턱부(2c)를 더 포함하고, 상기 외부 단턱부(2c)는 내부 단차부(2b)에 압입된 밸브하우징(110)의 걸림부 외측 단턱(114b)을 가압 변형하여 고정하는 브레이크 시스템의 체크 밸브.The method of claim 1,
The hole block 2 further includes an outer stepped part 2c, and the outer stepped part 2c pressurizes the outer part of the latching step 114b of the valve housing 110 press-fitted into the inner stepped part 2b. The check valve of the brake system to deform and fix. 제 1항 또는 제 2항에 있어서,
상기 체크 밸브는 밸브하우징(110)의 걸림부(114) 전방과 밸브시트(130)의 제3내경부(130d) 후방 양측이 유공 블록(2)에 지지되는 브레이크 시스템의 체크 밸브.3. The method according to claim 1 or 2,
The check valve is a check valve of a brake system in which both sides of the valve housing 110 and the rear of the third inner diameter 130d of the valve seat 130 are supported by the hole block 2.
KR1020110021774A 2011-03-11 2011-03-11 Check valve of hydraulic break system KR20120103866A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180130333A (en) * 2017-05-29 2018-12-07 주식회사 만도 Check valve
KR20190017861A (en) * 2019-02-14 2019-02-20 주식회사 만도 Check valve
CN109611586A (en) * 2018-12-29 2019-04-12 浙江亿日气动科技有限公司 Embedded one-way valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180130333A (en) * 2017-05-29 2018-12-07 주식회사 만도 Check valve
CN109611586A (en) * 2018-12-29 2019-04-12 浙江亿日气动科技有限公司 Embedded one-way valve
KR20190017861A (en) * 2019-02-14 2019-02-20 주식회사 만도 Check valve

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