KR19980050624A - Anti-Skid Braking System - Google Patents
Anti-Skid Braking System Download PDFInfo
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- KR19980050624A KR19980050624A KR1019960069461A KR19960069461A KR19980050624A KR 19980050624 A KR19980050624 A KR 19980050624A KR 1019960069461 A KR1019960069461 A KR 1019960069461A KR 19960069461 A KR19960069461 A KR 19960069461A KR 19980050624 A KR19980050624 A KR 19980050624A
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- South Korea
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- pressure
- brake
- flow
- valve
- flow rate
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Classifications
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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
- 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
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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
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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
- 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
- B60T8/40—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 comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
- B60T8/4068—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 comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system the additional fluid circuit comprising means for attenuating pressure pulsations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2304/00—Optimising design; Manufacturing; Testing
- B60Y2304/07—Facilitating assembling or mounting
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- 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)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Regulating Braking Force (AREA)
Abstract
본 발명은 차량용 유압브레이크의 제동압력을 조절하여 제동시 치륜의 슬립현상을 방지하는 차량용 미끄럼방지 제동장치(Anti-lock Brake system : ABS)에 관한것으로, 특히, 구조를 단순화하여 부품 수와 크기를 줄이고, 유량조절밸브와 솔레노이드를 간단하게 일체화하여 제작과 조립 및 생산성을 향상시킬 수 있게 한것이다.The present invention relates to an anti-lock brake system (ABS) for controlling a brake pressure of a hydraulic brake for a vehicle to prevent slippage of the wheel during braking. In order to reduce the flow rate, the flow control valve and solenoid can be easily integrated to improve the manufacturing, assembly and productivity.
본 발명은, 압력을 발생시키는 마스터실린더, 상기 마스터실린더에서 나온 유량을 정해진 유량으로 조절하는 유량조절밸브와, 브레이크에 걸린 제동압력제거시 작동하는 솔레노이드와, 이 브레이크의 유량을 충진하는 저압어큐무레이터와, 이를 증압시키는 고압펌프와, 상기 펌프에서 토출된 고압력의 맥동을 감소시키는 버퍼 챔버와, 오리피스, 머스터실린더로부터 펌프 출구로의 역류를 방지하는 첵밸브와, 운전자가 페달에서 발을 떼었을 때 휠 실린더의 압력을 신속하게 해제하는 첵밸브와, 솔레노이드밸브와 유량조절밸브를 일체로 고정하는 고정판을 구비하여 되는 구성으로 됨을 특징으로 하고 있다.The present invention provides a master cylinder for generating a pressure, a flow regulating valve for regulating the flow rate from the master cylinder to a predetermined flow rate, a solenoid operated when the brake pressure applied to the brake is removed, and a low pressure accumulator for filling the flow rate of the brake. A high pressure pump to boost it, a buffer chamber to reduce high pressure pulsations discharged from the pump, a check valve to prevent backflow from the orifice and the master cylinder to the pump outlet, and the driver The valve is characterized in that it comprises a check valve for quickly releasing the pressure of the wheel cylinder, and a fixed plate for integrally fixing the solenoid valve and the flow control valve.
Description
본 발명은 차량용 유압브레이크의 제동압력을 조절하여 제동시 차륜의 슬립현상을 방지하는 차량용 미끄럼방지 제동장치(Anti-1ock Brake system : ABS)에 관한것으로, 특히, 구조를 단순화하여 부품 수와 크기를 줄이고, 유량조절밸브와 솔레노이드를 간단하게 일체화하여 제작과 조립 및 생산성을 향상시킬 수 있게 한것이다.The present invention relates to a vehicle anti-skid braking system (Anti-1ock Brake system: ABS) to prevent the slip phenomenon of the wheel during braking by adjusting the braking pressure of the hydraulic brake for the vehicle, in particular, to simplify the structure to reduce the number and size of parts In order to reduce the flow rate, the flow control valve and solenoid can be easily integrated to improve the manufacturing, assembly and productivity.
일반적으로 차량용 미끄럼방지 제등장치(ABS)는 도 1과 도 2에 도시한 마스터실린더(100)와, 솔레노이드(300) 및 유량조절밸브(400)로 되는 모듈레이터와, 피스톤 펌프(500), 브레이크(200)로 구성되고 있다.In general, an anti-slip lantern (ABS) for a vehicle includes a master cylinder (100) shown in FIGS. 1 and 2, a modulator including a solenoid (300) and a flow control valve (400), a piston pump (500), and a brake ( 200).
이러한 구성으로 된 종래의 ABS는 정상 상태, 즉, 미끄럼이 일어나지 않는 상태에서는 솔레노이드(300)가 스프링(311a)에 의해서 피스톤 펌프(500)로 통하는 유로(316)를 막고 있어, 마스터실린더(100)에서 발생한 유압은 유량조절밸브(400)내의 스풀(430)을 통하여 브레이크(200)로 직접 전달되어 제동이 이루어지고, 슬립율이 증가하여 제동압력의 감소가 필요한 경우, 콘트롤러(700)가 솔레노이드(S)에 전류를 공급하여 밸브헤드(311)를 들어 올려서 유량조절밸브(400)와 피스톤 펌프(500) 사이의 유로를 개방하여 펌프(500)를 작동하게 된다.In the conventional ABS having such a configuration, the solenoid 300 blocks the flow passage 316 through the spring 311a to the piston pump 500 in a normal state, that is, no slip occurs, and thus the master cylinder 100 The hydraulic pressure generated from the brake is directly transmitted to the brake 200 through the spool 430 in the flow regulating valve 400, and when the slip rate is increased and the braking pressure is required to be reduced, the controller 700 includes a solenoid ( S) by supplying a current to lift the valve head 311 to open the flow path between the flow control valve 400 and the piston pump 500 to operate the pump 500.
이때, 펌프(500)의 작등에 의해서 펌프로 가는 유로(316)와 연결된 압력실(320)의 압력이 감소하므로 스풀(430)은 도 2 와 같이 스프링(470)의 힘을 이기고 좌측으로 이동하여 브레이크(200)와 마스터실린더(100)를 차단시키고, 브레이크(200)와 유로(316)을 연결하게 되어 브레이크 압력은 감소하게 된다.At this time, since the pressure of the pressure chamber 320 connected to the flow path 316 going to the pump is reduced by the operation of the pump 500, the spool 430 overcomes the force of the spring 470 as shown in FIG. The brake 200 and the master cylinder 100 are blocked, and the brake 200 and the flow path 316 are connected to each other so that the brake pressure is reduced.
압력 감소가 계속되어 바퀴(W)의 슬립율이 규정된 값 이하로 떨어지면, 솔레노이드(S)에 전류 공급을 중단하여 유량조절밸브(311)가 브레이크(200)에서 펌프(500)로 연결되는 유로를 차단하여 압력실(320)의 압력을 회복시킴으로서 스풀(430)은 다시 우측으로 이동하기 시작한다.If the pressure decrease continues and the slip ratio of the wheel W falls below a prescribed value, the flow of the flow control valve 311 is connected from the brake 200 to the pump 500 by stopping supply of current to the solenoid S. By cutting off the pressure in the pressure chamber 320 to recover the spool 430 starts to move to the right again.
이때 스풀(430)은 유로(340)가 열리는 순간까지만 이동하여 오리피스(460)의 양단부의 압력과 스프링(470)의 힘이 평형을 이루는 위치에 위치하게 되고, 또한 오리피스(460)의 크기와 이 오리피스(460)를 사이에 두고 있는 두 개의 챔버에서 일정하게 유지되는 압력 차에 의해서 브레이크(200)에 공급되는 유량은 일정하므로 브레이크에서의 압력 증가율이 조질된다.At this time, the spool 430 moves only until the moment when the flow path 340 is opened and is positioned at a position where the pressure of both ends of the orifice 460 and the force of the spring 470 are balanced, and the size of the orifice 460 Since the flow rate supplied to the brake 200 is constant due to the constant pressure difference in the two chambers having the orifice 460 interposed therebetween, the rate of pressure increase in the brake is adjusted.
이 압력 증가가 계속되어 브레이크(200)의 압력이 마스터실린더(100) 압력과같게 되면, 스풀(430) 양단의 평형은 잃게 됨에 따라 스풀(430)은 다시 우측으로이동하게 되어 정상 제동 상태가 된다.If this pressure increase continues and the pressure of the brake 200 becomes equal to the pressure of the master cylinder 100, the equilibrium of both ends of the spool 430 is lost, and the spool 430 is moved to the right again, thereby becoming a normal braking state. .
압력 증가 상태 중에도 다시 압력의 감소가 필요한 경우에는 솔레노이드(S)가 작동되어 압력 감소 상태로의 복귀가 가능하므로 브레이크 압력을 적절하게 조정할 수 있게 된다.When the pressure needs to be reduced again during the increase in pressure, the solenoid S is operated to allow the return to the reduced pressure so that the brake pressure can be properly adjusted.
이와 같은 종래의 ABS는 선회 가속시나 출발 급가속시 운전자의 페달 조작없이도 브레이크의 구동력을 자동 제어하여 부드러운 출발과 주행안정성을 향상시킬 수 있는 트랙션 컨트롤 시스템을 부가시키는데 많은 어려움을 안고 있다.Such a conventional ABS has a lot of difficulties in adding a traction control system that can automatically control the driving force of the brake without turning the pedal of the driver during turning acceleration or starting acceleration, to improve the smooth start and running stability.
그리고, 유량조절밸브(400) 내부의 스풀섭동부와 스풀(430)의 구조 및 제작에어려움이 많아 가격이 고가이고, 유량조절밸브(400)에 유량조절밸브(311)가 수직으로 배치되므로서 모듈레이터가 커지는 등 문제점이 있었다.In addition, since the structure and manufacturing difficulties of the spool perturbation part and the spool 430 inside the flow control valve 400 are high, the price is high, and the flow control valve 311 is vertically disposed on the flow control valve 400. There was a problem such as a large modulator.
따라서 본 발명은 상기와 같은 종래의 문제점을 해소하기 위해서, 본발명에서는 운전자가 페달 조작 없이도 펌프의 작동과 유량조절밸브의 개폐에 따라 각 바퀴(W)에 선택적으로 제동압력을 형성시킬 수 있게 되어 선회가속시 또는 급출발시 구동력을 자동 제어하여 주행안정성을 향상시키는 트랙션 컨트롤 기능을가능하게 함을 그 목적으로 하고 있다.Therefore, in order to solve the conventional problems as described above, in the present invention, the driver can selectively form a braking pressure on each wheel (W) according to the operation of the pump and opening and closing of the flow control valve without a pedal operation. The object of the present invention is to enable a traction control function that automatically improves driving stability by controlling driving force during turning acceleration or sudden start.
또한, 본 발명의 또 다른 목적에는 부품 및 크기를 줄이고, 유량조절밸브와 유량조절밸브를 조립구조를 단순 일체화하여 제작과 조립 등이 간편하게 이루어질수 있게 하여 생산비를 낮출 수 있게 한 것이다.In addition, another object of the present invention is to reduce the production cost and to reduce the parts and size, to simplify the production and assembly of the flow control valve and the flow control valve assembly structure.
상기한 목적을 달성하기 위하여 본 발명은, 압력을 발생시키는 마스터실린더, 상기 마스터실린더에서 나온 유량을 정해진 유량으로 조절하는 유량조절밸브와, 브레이크에 걸린 제동압력 제거시 작동하는 솔레노이드와, 이 브레이크의 유량을 충진하는 저압어큐무레이터와, 이를 증압시키는 고압펌프와, 상기 펌프에서 토출된 고압력의 맥동을 감소시키는 버퍼 챔버와, 오리피스, 브레이크로부터 펌프 출구로의 여류를 방지하는 책밸브와, 운전자가 페달에서 발을 떼었을 때 휠 실린더의 압력을 신속하게 해제하는 첵밸브와, 솔레노이드밸브와 유량조절밸브을 일체로 고정하는 고정판을 구비하여 되는 구성으로 됨을 특징으로 하고 있다.In order to achieve the above object, the present invention provides a master cylinder for generating pressure, a flow regulating valve for regulating the flow rate from the master cylinder to a predetermined flow rate, a solenoid operated when removing the braking pressure applied to the brake, and A low pressure accumulator to fill the flow rate, a high pressure pump to boost it, a buffer chamber to reduce the high pressure pulsation discharged from the pump, a surge valve to prevent the flow from the orifice and the brake to the pump outlet, The valve is characterized in that it comprises a check valve for releasing the pressure of the wheel cylinder quickly when the pedal is released, and a fixed plate for integrally fixing the solenoid valve and the flow control valve.
상기 솔레노이드밸브와 고정판으로 고정되는 유량조절밸브에는 유로가 구비되는 로드와 유로가 구비되는 피스톤 사이에 스프링이 설치되어 스프링으로 지지되는 로드는 솔레노이드밸브의 플런져볼에 의해 유로가 차단되고, 피스톤은 로드볼과 당접되는 것에 의해 유로가 차단되며, 상기 피스톤에는 마스터실린더와 브레이크를 연결하는 오리피스를 내재하고, 피스톤의 양단에 압력실을 형성하고, 마스터실린더로부터의 유압은 유량조절밸브를 통하여 직접 휠로 전달되고,유량조절밸브는 펌프의 입구 및 저압어큐무레이터와 연결되는 폐회로로 구성된것을 특징으로 하고 있다.The flow regulating valve fixed by the solenoid valve and the fixed plate is provided with a spring between the rod having the flow path and the piston having the flow path, and the rod supported by the spring is blocked by the plunger ball of the solenoid valve, and the piston has a rod. The flow path is blocked by contact with the ball, and the piston has an orifice connecting the master cylinder and the brake, and a pressure chamber is formed at both ends of the piston, and hydraulic pressure from the master cylinder is transferred directly to the wheel through a flow control valve. The flow control valve is characterized in that the closed circuit is connected to the inlet of the pump and the low pressure accumulator.
이하, 본 발명의 바람직한 실시 예를 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 1,2는 증래 차량용 미끄럼방지 제등장치의 동작상태도, 도 3은 본 발명이 적용된 차량용 미끄럼방지 제등장치의 구성도, 도 4는 본 발명에 따른 유량조절밸브의 구성도, 도 5 (가),(나)는 유량조절밸브의 작동 관계를 나타낸 참고도, 도 6은 본 발명의 다른 실시 예도.Figure 1 and 2 is an operating state of the anti-slip lantern device for a future vehicle, Figure 3 is a block diagram of a non-slip lantern device for vehicles to which the present invention is applied, Figure 4 is a block diagram of a flow control valve according to the present invention, Figure 5 ), (B) is a reference diagram showing the operation of the flow control valve, Figure 6 is another embodiment of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 마스터실린더 3 : 유량조절밸브 4 : 솔레노이드밸브1: master cylinder 3: flow control valve 4: solenoid valve
2 : 브레이크 6 : 저압어큐무레이터 7 : 펌프2: brake 6: low pressure accumulator 7: pump
8 : 버퍼챔버 9 : 오리피스8: buffer chamber 9: orifice
31 : 요크 32 : 로드31: York 32: Rod
33 : 피스톤 33a : 로드볼접촉부 33b : 오리피스33: piston 33a: rod ball contact portion 33b: orifice
33c : 하단압력실 34 : 스프링 35 : 쵸코33c: lower pressure chamber 34: spring 35: chocolate
37 : 상단압력실 41 : 플런져 42 : 고정판37 upper pressure chamber 41 plunger 42 fixed plate
도 3은 본 발명의 구성을 개략적으로 나타낸 구성도 이다.3 is a configuration diagram schematically showing the configuration of the present invention.
이에 도시한 바와 같이 압력을 발생시키는 마스터실린더(1)와, 상기 마스터실린더(1)에서 나온 유량을 정해진 유량으로 조절하여 브레이크(2)에 보내 제동 작용을 하게 하는 유량조절밸브(3)와, 브레이크(2)에 걸린 제동압력 제거시(6) 작동하는 솔레노이드밸브(4)와 브레이크(2)의 유량을 충진하는 저압어큐무레이터(6) 및 증압시키는 펌프(7)와, 펌프(7)에서 토출된 고압력의 맥동을 감소시키기 위한 버퍼 챔버(8)와, 오리피스(9), 브레이크(2)로부터 펌프(7) 출구로의 역류방지를 위한 첵밸브(V1), 운전자가 메달에서 발을 떼었을 때, 휠실린더의 압력을 신속하게 해제하는 첵밸브(V2), 솔레이노이드밸브(4)와 유량조절밸브(3)를 고정하는 고정판(5) 으로 되는 구성으로 이루어지고 있다.As shown therein, a master cylinder 1 for generating pressure, a flow rate control valve 3 for regulating the flow rate from the master cylinder 1 to a predetermined flow rate and sending it to the brake 2 for braking action, The solenoid valve 4 which operates when the braking pressure applied to the brake 2 is removed (6), the low pressure accumulator 6 which fills the flow rate of the brake 2, the pump 7 for boosting, and the pump 7 Buffer chamber (8) for reducing high pressure pulsations discharged from the valve, orifice (9), check valve (V1) for preventing backflow from the brake (2) to the outlet of the pump (7), and the driver When it is detached, it consists of the structure which consists of the check valve V2 which releases the pressure of a wheel cylinder quickly, the fixed plate 5 which fixes the solenoid valve 4, and the flow regulating valve 3. As shown in FIG.
상기 솔레노이드밸브(4)와 고정판(42)으로 고정되는 유량조절밸브(3)에는 유로(32d)가 구비되는 로드(32)와 오리피스(33b)가 구비되는 피스톤(33) 사이에 스프링(34)이 설치되어 스프링(34)으로 지지되는 로드(32)는 솔레노이드밸브(4)의 플런져(41) 볼(41a)에 의해 유로(32d)가 차단되고, 피스톤(33)은 로드(32) 볼(32a)과당접되는 것에 의해 오리피스(33b)가 차단되는 구성으로 되고 있다.The flow rate control valve 3 fixed by the solenoid valve 4 and the fixed plate 42 has a spring 34 between the rod 32 having the flow path 32d and the piston 33 having the orifice 33b. The rod 32, which is installed and supported by the spring 34, is blocked by the plunger 41 ball 41a of the solenoid valve 4, and the flow path 32d is blocked, and the piston 33 is the rod 32 ball. The orifice 33b is cut off by being abutted with the 32a.
상기 플런저볼(41a)과 로드볼(32a)이 접촉하는 로드(32)와 피스톤(33)에 설치되는 유로(32d)(33d)의 볼접촉부에 유량을 조절하는 오리피스(32d)(33d)를 형성하여 유로(L3)로 유입되는 유량이 오리피스(32c), 유로(32d)를 지나 저압어큐무레이터(6) 측 유로(L4)로 흐르도록 되고 있다.Orifices 32d and 33d for adjusting the flow rate to the ball contact portions of the rod 32 and the flow path 32d and 33d provided in the piston 33 and the rod 32 in contact with the plunger ball 41a and the rod ball 32a are provided. formed by being allowed to flow into flow passage (L 3) the flow rate flowing in through the orifice (32c), passage (32d), the low pressure air kyumu concentrator (6) side channel (L 4).
상기 피스톤(33)의 양단에는 상·하 압력실(33c,37)이 형성되고, 일측에는 스프링(34)의 힘과 양단압력실(33c),(37)의 압력 차가 평형을 이루게 하는 쵸크(35)가구비되고, 마스터실린더 (1)의 유압은 유량조절밸브(3)를 통하여 직접 휠(W)로 전달되고, 유량조절밸브(3)는 펌프(7)의 입구 및 저압어큐무레이터(6)와 연결되는 폐회로를 이루는 구성으로 되고 있다.Upper and lower pressure chambers 33c and 37 are formed at both ends of the piston 33, and at one side, chokes for equilibrating the force difference between the force of the spring 34 and the pressure difference between the pressure chambers 33c and 37 at both ends ( 35, the hydraulic pressure of the master cylinder (1) is transmitted directly to the wheel (W) through the flow control valve (3), the flow control valve (3) is the inlet of the pump (7) and the low pressure accumulator ( 6) is configured to form a closed circuit connected to.
이와 같이 구성된 본 발명은 도 3,4 에 나타낸 바와 같이 운전자가 브레이크페달(F)을 밟게 되면, 마스터실린더(1)에서는 압력이 발생하고, 이 압력은 유로(Ll,L2)와 유량조절밸브(3)의 하단압력실(33c)과 유량을 조절하는 오리피스(33b)를 지나서 유로(L3)를 통해 브레이크(2)에 공급되게 된다.3 and 4, when the driver steps on the brake pedal F, pressure is generated in the master cylinder 1, and the pressure is adjusted to the flow paths L 1 and L 2 and flow rate control. The lower pressure chamber 33c of the valve 3 and the orifice 33b for adjusting the flow rate are supplied to the brake 2 through the flow path L 3 .
그러나, 슬립율이 일정한 값을 넘어 제동압력의 감소가 필요한 경우에는 일단 펌프(7)를 구동하는 모터에 전류를 공급하고 나서 솔레노이드밸브(4)에 전류를 인가시키면, 플런져(41)는 도 5 (나)와 같이 위로 올라가 플런져볼(41a)에 의해 막혀있던 유로(32d)와 유로(31a)는 연통되고, 유량은 오리피스(32c)에 의해 제한되어 유로(L4)로 흘러 저압어큐무레이터(6)에 충진되면서 감압되기 시작한다.However, when the slip rate exceeds a certain value and the braking pressure needs to be reduced, once the current is supplied to the motor driving the pump 7, the current is applied to the solenoid valve 4, the plunger 41 is shown in FIG. The flow passage 32d and the flow passage 31a, which are blocked by the plunger ball 41a, move up as shown in 5 (b), and the flow rate is limited by the orifice 32c and flows into the flow passage L 4 . As the filler 6 is filled, the pressure is reduced.
이 순간 내부에 유량을 조절하는 오리피스(33b)를 갖는 피스톤(33)이 오리피스(33b) 양단의 순간 압력차에 의해 상승하게 되어 로드볼(32a)에 로드볼접촉부(33a)가 접촉하여 유로(L3)와 유로(L2)가 차단되어 브레이크(2)의 압력 감소를 촉진시키게 된다.At this moment, the piston 33 having the orifice 33b for adjusting the flow rate therein is raised due to the instantaneous pressure difference across the orifice 33b, so that the rod ball contacting portion 33a contacts the rod ball 32a so that the flow path ( L 3 ) and the flow path L 2 are blocked to promote pressure reduction of the brake 2.
한편, 슬립율이 회복되면 솔레노이드밸브(4)의 전류 공급을 차단(OFF)하여유로(L4)와 유로(L3)의 연결을 끊어서 상단압력실(37)의 압력이 더 이상 감소되지 않도록 한다.On the other hand, when the slip ratio is restored, the current supply of the solenoid valve 4 is turned off to disconnect the flow path L 4 and the flow path L 3 so that the pressure in the upper pressure chamber 37 is no longer reduced. do.
이런 상태에서도 저압어큐무레이터(6)에 충진된 유량을 펌프(7)가 토출하기 시작하고 이 유량은 쵸크(35)를 통해 서서히 상부압력실(37)내로 돌어가서 피스톤(33)은 스프링(34)의 힘과 양단압력실(33c),(37)의 압력 차가 평형을 이루는 위치에까지 하강한다.Even in this state, the pump 7 starts to discharge the flow rate filled in the low pressure accumulator 6, and the flow rate gradually flows into the upper pressure chamber 37 through the choke 35 so that the piston 33 is spring ( The force of 34 and the pressure difference between the pressure chambers 33c and 37 at both ends are lowered to a position where an equilibrium is achieved.
이때, 양단 압력실(33c),(37)의 압력 차와 그 사이의 오리피스(33b) 직경에 의해 정해지는 유량이 유로(L3)를 통하여 브레이크(2)로 계속 공급되므로 브레이크의 압력은 서서히 상승되고, 저압어큐무레이터(6) 내의 오일이 모두 방출되면 브레이크(2)의 압력과 하단 압력실(33c)의 압력은 동일해진다. 이에 따라 정상 상태로 귀환하게 되는 것이다.At this time, since the flow rate determined by the pressure difference between the pressure chambers 33c and 37 at both ends and the diameter of the orifice 33b therebetween is continuously supplied to the brake 2 through the flow path L 3 , the pressure of the brake is gradually When the oil is raised and all the oil in the low pressure accumulator 6 is discharged, the pressure of the brake 2 and the pressure of the lower pressure chamber 33c become equal. This will return to the normal state.
그리고, 압력 회복 중에 다시 압력 감소가 필요한 경우에도 솔레노이드밸브(4)와 펌프(7)를 작동시키면 전술한 바와 같이 압력 감소 모드로 진행한다.Further, even when the pressure reduction is required again during the pressure recovery, when the solenoid valve 4 and the pump 7 are operated, the pressure reduction mode proceeds as described above.
운전자가 브레이크 페달에서 발을 떼어 마스터실린더(1)의 압력을 제거하면 브레이크(2)의 압력은 첵밸브(V2)를 통해 즉시 감소되어 제동이 해제된다.When the driver releases the pressure of the master cylinder 1 by releasing the brake pedal, the pressure of the brake 2 is immediately reduced through the check valve V 2 to release the braking.
도 6은 본 발명을 이용하여 트랙션 콘트롤 시스템을 갖춘 ABS를 구성한 다른 실시 예를 나타내고 있다.6 illustrates another embodiment of an ABS having a traction control system using the present invention.
유량조절밸브(A)에 전류가 공급되면 운전자의 페달(F) 조작 없이도 압력형성이 가능하게 되어 트랙션콘트롤 시스템으로 전환된다.When the current is supplied to the flow control valve (A) it is possible to form pressure without the operator's pedal (F) to switch to the traction control system.
이와 같이 본 발명은 유량조절밸브(3)와 솔레노이드밸브(4)가 하나의 고정판(5)에 의해 조립 고정되어지므로서 조립성이 향상되고, 유량조절밸브(3)의 부품 수가 적으므로 상대적으로 유압 모듈레이터의 크기가 작아지고, 부품의 제작및 가공이 용이하여 생산비가 대폭 절감되는 이점이 있다.As described above, the present invention is improved in assembling performance by being fixed by assembling and fixing the flow regulating valve 3 and the solenoid valve 4 by one fixing plate 5, and the number of parts of the flow regulating valve 3 is relatively small. The size of the hydraulic modulator is reduced, the production and processing of parts are easy, and there is an advantage in that the production cost is greatly reduced.
이상에서 설명한 바와 같이 본 발명은, 한 개의 유량조절밸브의 추가만으로운전자가 페달 조작 없이도 펌프의 작동과 유량조절밸브의 개폐에 따라 각바퀴(W)에 선택적으로 제동압력을 형성시킬 수 있게 되어 선회가속시 또는 급출발시 구동력을 자동 제어하여 주행 안정성을 향상시키는 트랙션 컨트롤이 가능하고, 부품수와 크기를 줄임으로서 구조가 단순화되고, 유량조절밸브와 유량조절밸브를 일체화하는 유압 모듈레이터의 제작과 조립이 용이하여 생산비가 적게 드는 등의 효과가 있게 된다.As described above, the present invention enables the driver to selectively generate a braking pressure on each wheel (W) according to the operation of the pump and the opening and closing of the flow control valve without the pedal operation by adding only one flow control valve. Traction control to improve driving stability by automatic control of driving force during acceleration or rapid start, simplified structure by reducing the number of parts and size, and manufacture and assembly of hydraulic modulator integrating flow control valve and flow control valve It is easy to produce the effect such as low production cost.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960069461A KR100230047B1 (en) | 1996-12-21 | 1996-12-21 | An anti-lock brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960069461A KR100230047B1 (en) | 1996-12-21 | 1996-12-21 | An anti-lock brake system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR19980050624A true KR19980050624A (en) | 1998-09-15 |
| KR100230047B1 KR100230047B1 (en) | 1999-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019960069461A KR100230047B1 (en) | 1996-12-21 | 1996-12-21 | An anti-lock brake system |
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| KR (1) | KR100230047B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100492735B1 (en) * | 1998-12-24 | 2005-10-26 | 주식회사 로템 | Brake System for Railway Vehicles |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101187196B1 (en) | 2010-07-28 | 2012-10-02 | 주식회사 만도 | Hydraulic break system |
-
1996
- 1996-12-21 KR KR1019960069461A patent/KR100230047B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100492735B1 (en) * | 1998-12-24 | 2005-10-26 | 주식회사 로템 | Brake System for Railway Vehicles |
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| KR100230047B1 (en) | 1999-11-15 |
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