KR100328228B1 - Anti-lock brake system for vehicle - Google Patents

Anti-lock brake system for vehicle Download PDF

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Publication number
KR100328228B1
KR100328228B1 KR1019970075530A KR19970075530A KR100328228B1 KR 100328228 B1 KR100328228 B1 KR 100328228B1 KR 1019970075530 A KR1019970075530 A KR 1019970075530A KR 19970075530 A KR19970075530 A KR 19970075530A KR 100328228 B1 KR100328228 B1 KR 100328228B1
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South Korea
Prior art keywords
solenoid valves
braking
brake system
brakes
lock brake
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KR1019970075530A
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Korean (ko)
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KR19990055578A (en
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경 일 박
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밍 루
주식회사 만도
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Priority to KR1019970075530A priority Critical patent/KR100328228B1/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
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • B60T13/683—Electrical control in fluid-pressure brake systems by electrically-controlled valves in pneumatic 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
    • B60T13/10—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
    • 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
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/10—ABS control systems
    • 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)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)

Abstract

PURPOSE: An anti-lock brake system for a vehicle is provided to perform ABS(Anti-lock Brake System) control by using an electronic control booster without a pump and an accumulator. CONSTITUTION: An anti-lock brake system for a vehicle comprises a servo(20); a master cylinder(30) having an oil storage tank(31) forming damping hydraulic pressure by the strength transmitted from the servo; brakes(60,61,62,63) receiving the damping hydraulic pressure and making damping force, with installed to front wheels and rear wheels; normal open solenoid valves(50,51,52,53) and normal close solenoid valves(40,41,42,43) for controlling the flowing of hydraulic pressure, with disposed at the inlet and outlet sides of the brakes; and an electronic control unit for controlling the opening and shutting motions of the normal open and closed solenoid valves. A pneumatic valve(21) opened and shut by the electronic control unit so that power distribution is formed at the servo. Therefore, the number of parts is reduced and the size of a modulator is reduced.

Description

차량용 안티록 브레이크 시스템Automotive Antilock Brake System

본 발명은 차량용 안티록 브레이크 시스템에 관한 것으로, 더욱 상세하게는 펌프와 어큐뮤레이터의 필요없이 전자제어부스터를 이용 ABS제어를 수행하는 안티록 브레이크 시스템의 부스터에 관한 것이다.The present invention relates to a vehicle antilock brake system, and more particularly, to a booster of an antilock brake system for performing ABS control using an electronic control booster without the need for a pump and an accumulator.

차량에는 제동을 위한 브레이크 시스템이 필수적으로 장착되는데, 최근에 보다 강력하고 안정된 제동력을 얻기 위한 여러 종류의 시스템이 제안되고 있다. 이 중에서 안티록 브레이크 시스템이 가장 진보적인 효과를 발휘하고 있는데, 도 1은 이러한 안티록 브레이크 시스템의 일반적인 구성을 보인 계통도이다.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. Among them, the anti-lock brake system exhibits the most advanced effect. FIG. 1 is a schematic diagram showing a general configuration of such an anti-lock brake system.

종래 안티록 브레이크 시스템은 이에 도시한 바와 같이, 전륜(FL,FR)과 후륜(RL,RR)에 각각 유압에 의해 제동력을 발생하는 드럼 또는 캘리퍼식의 유압 브레이크(9a,9b,9c,9d)가 설치되며, 제동유압을 형성하여 브레이크(9a,9b,9c,9d)로 전달하는 배력장치(2)와 오일저장탱크(3a)가 마련된 마스터실린더(3)로 크게 이루어져 있다.The conventional anti-lock brake system is a drum or caliper hydraulic brakes 9a, 9b, 9c, and 9d that generate braking force by hydraulic pressure to the front wheels FL, FR and the rear wheels RL and RR, respectively, as shown therein. It is installed and consists of a master cylinder (3) provided with a hydraulic power storage device (2) and the oil storage tank (3a) for forming a braking hydraulic pressure to deliver to the brakes (9a, 9b, 9c, 9d).

배력장치(2)는 진공과 대기와의 압력차이를 이용하여 작은 힘으로 큰 제동력을 발생시키는 장치로서, 운전석에 마련된 브레이크패달(1)과 연계되어 이에 의해 작동된다. 마스터실린더(3)는 배력장치(2)로부터 증폭된 힘을 전달받아 제동유압을 형성하는 것으로, 각 브레이크(9a,9b,9c,9d)와는 유압라인을 통해 연결되어 있다.The power booster 2 is a device that generates a large braking force with a small force by using a pressure difference between the vacuum and the atmosphere, and is operated by being connected to the brake pedal 1 provided in the driver's seat. The master cylinder 3 receives the amplified force from the power booster 2 to form a braking hydraulic pressure, and is connected to the brakes 9a, 9b, 9c, and 9d through a hydraulic line.

한편, 각 브레이크(9a,9b,9c,9d)의 입구측과 출구측에는 솔레노이드밸브가 설치되어 있어서 각 브레이크(9a,9b,9c,9d)로 전달되는 유압을 제어한다. 이것은 입구측에 배치되는 노말오픈형 솔레노이드밸브(5a,5b,5c,5d)와 출구측에 배치되는 노말클로즈형 솔레노이드밸브(4a,4b,4c,4d)로 구별되며, 전기제어장치(E.C.U,미도시)에 의해 제어됨으로써 강력하고 안정된 제동력을 발휘하게 된다. 이 때, 전기제어장치(미도시)는 전륜(FR,FL)과 후륜(RR,RL)에 마련된 휠센서(미도시)를 통해 차속을 감지하고, 이들을 제어한다.On the other hand, solenoid valves are provided on the inlet and outlet sides of the brakes 9a, 9b, 9c, and 9d to control the hydraulic pressure transmitted to the brakes 9a, 9b, 9c, and 9d. This is divided into normal-open solenoid valves 5a, 5b, 5c, and 5d arranged at the inlet side and normal-closed solenoid valves 4a, 4b, 4c and 4d arranged at the outlet side, and the electric control unit (ECU) It is controlled by si), and it shows strong and stable braking force. At this time, the electric controller (not shown) detects the vehicle speed through the wheel sensors (not shown) provided in the front wheel (FR, FL) and the rear wheel (RR, RL), and controls them.

그리고 전륜(FR,FL)측과 후륜(RR,RL)측의 노말클로즈형 솔레노이드밸브(4a,4b,4c,4d)의 하류에는 제1,2저압어큐뮤레이터(6a,6b)가 설치되어 감압모드시 브레이크(9a,9b,9c,9d)에서 토출된 오일이 일시 저장한다. 또한 제1,2저압어큐뮤레이터(6a,6b)의 후방에 제1,제2고압어큐뮤레이터(8a,8b)가 설치되며, 이들 사이에 한쌍의 제1,제2펌프(7a,7b)가 구성되어 제1,제2저압어큐뮤레이터(6a,6b)에 있는 저압의 오일을 가압하여 제1,제2고압어큐뮤레이터(8a,8b)로 펌핑한다. 미설명부호 7은 제1,제2펌프(7a,7b)를 구동시키는 모터이다.First and second low pressure accumulators 6a and 6b are provided downstream of the normal closed solenoid valves 4a, 4b, 4c and 4d on the front wheels FR and FL and the rear wheels RR and RL. In the decompression mode, the oil discharged from the brakes 9a, 9b, 9c, and 9d is temporarily stored. In addition, the first and second high pressure accumulators 8a and 8b are disposed behind the first and second low pressure accumulators 6a and 6b, and a pair of first and second pumps 7a and 7b are disposed therebetween. ) Is configured to pressurize the low pressure oil in the first and second low pressure accumulators 6a and 6b to pump the first and second high pressure accumulators 8a and 8b. Reference numeral 7 denotes a motor for driving the first and second pumps 7a and 7b.

이와 같이 구성된 종래의 안티록 브레이크 시스템은 주행 중에 운전자가 브레이크패달(1)을 밟으면 배력장치(1a)에서 기압차에 의해 배력이 발생되고, 계속하여 마스터실린더(3)에서는 증폭된 힘을 전달받아 유압을 형성한다. 이러한 유압은 노말오픈형 솔레노이드밸브(5a,5b,5c,5d)를 통해 전륜(FR,FL)과 후륜(RR,RL)에 마련된 각각의 브레이크(9a,9b,9c,9d)로 전달되어 제동작용을 하게 된다.In the conventional anti-lock brake system configured as described above, when the driver presses the brake pedal 1 while driving, the back force is generated by the pressure difference in the power supply device 1a, and the master cylinder 3 receives the amplified force. To form hydraulic pressure. This hydraulic pressure is transmitted to the respective brakes 9a, 9b, 9c, and 9d provided at the front wheels FR and FL and the rear wheels RR and RL through the normally open solenoid valves 5a, 5b, 5c, and 5d. Will be

한편, 노면조건보다 과도한 제동압력이 전달되면 차량의 타이어는 회전을 멈추고 미끌어져 가는 일종의 슬립현상이 발생되는데, 이러한 현상을 차량의 전륜(FR,FL)과 후륜(RR,RL)에 장착된 휠센서(미도시)가 감지하고 이를 안티록 브레이크 시스템의 전기제어장치(미도시)에 전달한다. 이에 따라 전기제어장치(미도시)에서는 노말클로즈형 솔레노이드밸브(4a,4b,4c,4d)가 개방되도록 작동시켜 브레이크(9a,9b,9c,9d) 내의 오일을 제거함으로써 제동압력을 낮춘다. 그리고 노말클로즈형 솔레노이드밸브(4a,4b,4c,4d)를 통해 토출된 오일은 제1,제2저압어큐뮤레이터(6a,6b)로 이동하여 잠시 저장되고, 모터(7)가 구동됨에 따라 제1,제2펌프(7a,7b)를 거쳐 다시 압력이 상승하여 제1,제2고압어큐뮤레이터(8a,8b)와 마스터실린더(3) 또는 노말오픈형 솔레노이드밸브(5a,5b,5c,5d)로 다시 순환하게 된다.On the other hand, when excessive braking pressure is transmitted than the road condition, a kind of slip phenomenon occurs that the tire of the vehicle stops rotating and slides. This phenomenon is applied to the wheels mounted on the front wheels FR and FL and the rear wheels RR and RL. A sensor (not shown) senses and delivers it to an electrical control device (not shown) of the antilock brake system. Accordingly, in the electric control device (not shown), the normal closed solenoid valves 4a, 4b, 4c, and 4d are operated to open, thereby lowering the braking pressure by removing oil in the brakes 9a, 9b, 9c, and 9d. The oil discharged through the normally closed solenoid valves 4a, 4b, 4c, and 4d is moved to the first and second low pressure accumulators 6a and 6b and stored for a while, and the motor 7 is driven. The pressure rises again through the first and second pumps 7a and 7b, so that the first and second high pressure accumulators 8a and 8b and the master cylinder 3 or the normally open solenoid valves 5a, 5b and 5c Cycles back to 5d).

이러한 종래 안티록 브레이크 시스템은 제동압력 감압과정시 각 브레이크(9a,9b,9c,9d)로부터 빠져나오는 오일이 제1,제2저압어큐뮤레이터(6a,6b)에 일시 저장되고, 제1,제2펌프(7a,7b)구동에 의해 다시 토출되어 마스터실린더(3)로 가게 된다. 이 때, 하나의 모터(7)에 의해 두 개의 제1,제2펌프(7a,7b)가 180도 위상차를 가지면서 구동되므로 전륜(FR,FL)측 브레이크(9a,9b)로부터 빠져나와 제1저압어큐뮤레이터(6a)에 저장된 오일과 제2저압어큐뮤레이터(6b)에 저장된 오일이 180도의 위상차를 가지면서 번갈아가며 펌핑된다. 또한 ABS의 감압모드는 전륜(FR,FL)과 후륜(RR,RL)을 동시에 수행하는 것이 아니기 때문에 제1저압어큐뮤레이터(6a)에 오일이 유입될 때, 제2저압어큐뮤레이터(6b)에는 오일이 유입되지 않는 경우도 발생된다. 이러한 상태에서 제1,제2펌프(7a,7b)가 구동하게 되면 제1저압어큐뮤레이터(6a)와 제2저압어큐뮤레이터(6b)로부터 토출되는 유속차이로 인해 소음이 발생된다. 즉, 제1저압어큐뮤레이터(6a)와 제2저압어큐뮤레이터(6b)로의 오일유입이 번갈아가면서 이루어지기 때문에 여기에 일시 저장되는 오일량도 교번적으로 차이가 발생된다. 이에 따라 제1저압어큐뮤레이터(6a)에서 제1펌프(7a)로 펌핑되는 오일유속과 제2저압어큐뮤레이터(6b)에서 토출되는 오일유속에서 차이가 발생되어 안티록 브레이크 시스템의 제동작용 중에 상당한 소음이 발생된다.In the conventional anti-lock brake system, oil coming out of each of the brakes 9a, 9b, 9c, and 9d during the braking pressure decompression process is temporarily stored in the first and second low pressure accumulators 6a and 6b. It is discharged again by the drive of the 2nd pump 7a, 7b, and goes to the master cylinder 3. As shown in FIG. At this time, since the two first and second pumps 7a and 7b are driven with a phase difference of 180 degrees by one motor 7, the first and second pumps 7a and 7b are driven out of the front wheels FR and FL side brakes 9a and 9b. The oil stored in the first low pressure accumulator 6a and the oil stored in the second low pressure accumulator 6b are alternately pumped with a phase difference of 180 degrees. In addition, since the decompression mode of ABS does not simultaneously perform the front wheels FR and FL and the rear wheels RR and RL, when the oil flows into the first low pressure accumulator 6a, the second low pressure accumulator 6b is used. ) Also occurs when oil does not flow. In this state, when the first and second pumps 7a and 7b are driven, noise is generated due to a flow rate difference discharged from the first low pressure accumulator 6a and the second low pressure accumulator 6b. That is, since the oil inflow into the first low pressure accumulator 6a and the second low pressure accumulator 6b is made alternately, the amount of oil temporarily stored therein also alternately occurs. As a result, a difference occurs between the oil flow rate pumped from the first low pressure accumulator 6a to the first pump 7a and the oil flow rate discharged from the second low pressure accumulator 6b, thereby causing a braking action of the antilock brake system. Significant noise is generated during the process.

또한 이러한 제1,제2저압어큐뮤레이터(6a,6b)와 제1,제2펌프(7a,7b) 및 제1,제2고압어큐뮤레이터(8a,8b) 등은 모두 모듈레이터(MODULATOR,미도시)의 몸체(미도시)에 모두 마련되는데, 이러한 내장품들로 인해 모듈레이터(미도시)를 컴팩트화하는 것에 그 한계가 있다.In addition, the first and second low pressure accumulators 6a and 6b, the first and second pumps 7a and 7b, and the first and second high pressure accumulators 8a and 8b are all modulators. All are provided in the body (not shown) of the not shown, there is a limit to the compactness of the modulator (not shown) due to these interiors.

본 발명은 이러한 문제점을 해결하기 위한 것으로, 본 발명의 목적은 전기제어장치에 의해 제어되는 공압밸브를 부스터에 설치함으로써, 증압 모드시 공압밸브의 개방작동에 따라 상대적으로 강한 배력이 발생되고, 이러한 힘을 전달받아 마스터실린더에서 제동유압이 강하게 형성 브레이크로 전달됨으로써, ABS제어의 증압제동작용을 수행하는 안티록 브레이크 시스템을 제공하는 것이다.The present invention is to solve this problem, the object of the present invention is to install a pneumatic valve controlled by the electric control device in the booster, a relatively strong power is generated according to the opening operation of the pneumatic valve in the boosting mode, The braking hydraulic pressure is strongly transmitted from the master cylinder to the forming brake by receiving the force, thereby providing an anti-lock brake system that performs the boosting braking action of the ABS control.

도 1은 종래 안티록 브레이크 시스템을 개략적으로 보인 계통도이다.1 is a schematic diagram of a conventional anti-lock brake system.

도 2는 본 발명에 따른 안티록 브레이크 시스템을 개략적으로 보인 계통도이다.2 is a schematic diagram of an antilock brake system according to the present invention.

도 3은 본 발명에 따른 전기제어장치의 전기적인 구성만을 도시한 제어블럭도이다.3 is a control block diagram showing only an electrical configuration of the electric control apparatus according to the present invention.

*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

10..브레이크패달 20..전기제어장치 30..마스터실린더10. Brake pedal 20. Electric control device 30. Master cylinder

40..노말클로즈형 솔레노이드밸브 50..노말오픈형 솔레노이드밸브40. Normally closed solenoid valve 50. Normally open solenoid valve

70..복귀유압라인 80..전기제어장치 81..휠센서70. Return hydraulic line 80. Electrical control 81. Wheel sensor

이러한 목적을 달성하기 위한 본 발명은, 브레이크패달의 작동에 따라 외부공기가 유입되어 기압차에 의해 배력이 형성되는 배력장치, 배력장치로부터 전달되는 힘에 의해 제동유압을 형성하는 오일저장탱크가 마련된 마스터실린더, 차량의 전륜과 후륜에 각각 마련되며 제동유압을 전달받아 제동력을 발휘하는 브레이크, 브레이크의 입구측과 출구측에 각각 마련되어 유압의 흐름을 제어하는 노말오픈형 솔레노이드밸브와 노말클로즈형 솔레노이드밸브, 노말오픈형 솔레노이드밸브와 노말오픈형 솔레노이드밸브의 개폐작동을 제어하는 전기제어장치를 갖춘 안티록 브레이크 시스템에 있어서,In order to achieve the above object, the present invention provides an oil storage tank for forming braking hydraulic pressure by a force transmitted from an external air flow in which external air is introduced by the operation of a brake pedal and a pressure is formed by a pressure difference device. A master cylinder, a brake provided at the front wheel and the rear wheel of the vehicle, respectively, to provide braking force by receiving braking hydraulic pressure, and a normally open solenoid valve and a normal closed solenoid valve that are provided at the inlet and outlet sides of the brake to control hydraulic flow. In the anti-lock brake system having an electric control device for controlling the opening and closing operation of the normally open solenoid valve and the normal open solenoid valve,

배력장치에는 부압원과 연결되며 배력장치에서 배력이 형성되도록 전기제어장치에 의해 개폐작동되는 공압밸브가 마련되는 것을 특징으로 한다.The booster is connected to a negative pressure source and is characterized in that the pneumatic valve is opened and closed by the electric control device so that the booster is formed in the booster.

이하, 본 발명에 따른 하나의 바람직한 실시예를 첨부도면을 참조하여 상세히 설명한다. 도 2는 본 발명에 따른 안티록 브레이크 시스템을 개략적으로 보인 계통도이고, 도 3은 본 발명에 따른 전기제어장치의 전기적인 구성만을 도시한 제어블럭도이다.Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings. Figure 2 is a schematic diagram showing an anti-lock brake system according to the present invention, Figure 3 is a control block diagram showing only the electrical configuration of the electrical control apparatus according to the present invention.

본 발명에 따른 안티록 브레이크 시스템은 이들에 도시한 바와 같이, 전륜(FR,FL)과 후륜(RR,RL)에 각각 설치된 브레이크(60,61,62,63)와 운전석 일측에 마련된 브레이크패달(10), 패달(10)의 작동에 의해 배력을 형성하며 이에 의해 제동유압이 발생되도록 배력장치(20)와 오일저장탱크(31)가 마련된 마스터실린더(30)가 구성되어 있다. 각 브레이크(60,61,62,63)의 입구측과 출구측에는 각각 유압의 흐름을 제어하도록 솔레노이드밸브가 설치되는데, 이것은 입구측에 설치된 노말오픈형 솔레노이드밸브(50,51,52,53)와 출구측에 마련된 노말클로즈형 솔레노이드밸브(40,41,42,43)로 구별된다.As shown in the antilock brake system according to the present invention, the brakes (60, 61, 62, 63) provided on the front wheel (FR, FL) and the rear wheel (RR, RL) and the brake pedal provided on one side of the driver's seat ( 10), the master cylinder 30 is provided with the booster device 20 and the oil storage tank 31 is provided to form a boost force by the operation of the pedal 10, thereby generating a braking hydraulic pressure. Solenoid valves are installed at the inlet and outlet sides of the brakes 60, 61, 62, and 63, respectively, to control the flow of hydraulic pressure, which is normally open solenoid valves 50, 51, 52, 53 installed at the inlet side and the outlet. Normally closed solenoid valves (40, 41, 42, 43) provided on the side.

그리고 전륜(FR,FL)측과 후륜(RR,RL)측의 노말클로즈형 솔레노이드밸브(40,41,42,43)의 토출구측과 오일저장탱크(31)를 연결하는 복귀유압라인(70)이 마련되어 있다. 따라서 감압제동에 따른 노말클로즈형 솔레노이드밸브(40,41,42,43)의 개방작동시 전륜(FR,FL)측과 후륜(RR,RL)측 브레이크(60,61,62,63)로부터 토출되는 오일은 복귀유압라인(70)을 통해 오일저장탱크(31)에 일시 저장된다.And a return hydraulic line 70 connecting the discharge port side of the normal closed solenoid valves 40, 41, 42, and 43 on the front wheel FR, FL side and the rear wheel RR, RL side to the oil storage tank 31. This is provided. Therefore, when the normal closed solenoid valve (40, 41, 42, 43) is opened during the decompression braking, it is discharged from the front (FR, FL) and rear (RR, RL) brakes (60, 61, 62, 63). The oil is temporarily stored in the oil storage tank 31 through the return hydraulic line (70).

한편, 배력장치(20)에는 부압원과 연결되며 후술하는 전기제어장치(80)에 의해 개폐작동되는 공압밸브(21)가 마련되어 있다. 이로 인해 공압밸브(21)의 개방작동시 배력장치(20)에서는 브레이크패달(10)에 의해 유입되는 외부공기와의 차압에 의해 발생되는 배력외에 공압밸브(21) 작동에 의해 발생되는 배력이 추가됨으로써, 마스터실린더(30)에서는 상당한 제동유압이 형성된다.On the other hand, the power supply device 20 is provided with a pneumatic valve 21 is connected to the negative pressure source and opened and closed by the electric control device 80 to be described later. As a result, in the power supply device 20 during the opening operation of the pneumatic valve 21, the power generated by the operation of the pneumatic valve 21 is added in addition to the power generated by the differential pressure with the external air introduced by the brake pedal 10. As a result, a significant braking hydraulic pressure is formed in the master cylinder 30.

한편, 각 솔레노이드밸브와 공압밸브(21)의 모든 개폐작동은 전기제어장치(80)에 의해 이루어지는데, 이러한 전기제어장치(80)의 구성을 도 3을 참조하여 좀 더 자세히 설명하면 다음과 같다.On the other hand, all the opening and closing operations of each solenoid valve and the pneumatic valve 21 is made by the electric control device 80, the configuration of the electric control device 80 will be described in more detail with reference to FIG. .

먼저, 전기제어장치(80)의 입력측에는 전륜(FR,FL)과 후륜(RR,RL)에 설치된 휠센서(81)가 전기적으로 접속되어 있으며, 이의 출력측에는 휠센서(81)에서 입력되는 신호에 의거하여 개폐작동되는 노말오픈형 솔레노이드밸브(50,51,52,53)와 노말클로즈형 솔레노이드밸브(40,41,42,43) 및 공압밸브(21)가 접속되어 있다. 따라서 휠센서(81)에서 입력되는 신호를 근거로 전륜(FR,FL)과 후륜(RR,RL)의 회전수를 감지하여 제동압력과 상승속도를 제어한다.First, the wheel sensor 81 provided at the front wheel FR, FL and the rear wheel RR, RL is electrically connected to an input side of the electric control device 80, and a signal input from the wheel sensor 81 at its output side. Normally open solenoid valves (50, 51, 52, 53), normal closed solenoid valves (40, 41, 42, 43) and pneumatic valves (21) connected to each other are connected. Therefore, the braking pressure and the rising speed are controlled by detecting the rotation speeds of the front wheels FR and FL and the rear wheels RR and RL based on the signal input from the wheel sensor 81.

다음에는 이와 같이 구성된 본 발명에 따른 차량용 안티록 브레이크 시스템의 일반적은 제동작동을 설명한다.Next, a general braking operation of the vehicle antilock brake system according to the present invention configured as described above will be described.

운전자는 자동차의 주행중이거나 정지상태에서 차량을 감속하거나 정지상태 유지를 위해 브레이크패달(10)을 밟게 된다. 이에 따라 배력장치(20)에서는 기압차에 의해 입력보다 증폭된 배력이 형성되고 이힘에 의해 마스터실린더(30)에서는 상당한 압력의 제동유압이 발생된다. 이러한 제동유압은 노말오픈형 솔레노이드밸브(50,51,52,53)를 통해 전륜(FR,FL)과 후륜(RR,RL)에 마련된 각 브레이크(60,61,62,63)로 전달됨으로써, 제동작용이 이루어진다. 그리고 운전자가 브레이크패달(10)에서 조금씩 또는 완전하게 발을 떼게 되면, 각 브레이크(60,61,62,63) 내의 오일압력은 노말오픈형 솔레노이드밸브(50,51,52,53)를 통해 다시 마스터실린더(30)로 복귀되어 제동력이 감소되거나 제동작용이 완전히 해제된다.The driver steps on the brake pedal 10 to decelerate the vehicle or maintain the stopped state while driving or stopping the vehicle. Accordingly, in the power supply apparatus 20, the power boosted by the pressure difference is amplified, and the braking hydraulic pressure of considerable pressure is generated in the master cylinder 30 by this force. The braking hydraulic pressure is transmitted to the brakes 60, 61, 62, and 63 provided on the front wheels FR, FL and the rear wheels RR, RL through the normally open solenoid valves 50, 51, 52, and 53, thereby braking. Work is done. When the driver releases the brake pedal 10 little or completely, the oil pressure in each brake 60, 61, 62, 63 is mastered again through the normally open solenoid valves 50, 51, 52, 53. The return to the cylinder 30 is reduced or the braking action is completely released.

한편, 차량 주행중에 감속 또는 정지를 목적으로 제동력 증가 / 유지상태로 제어하는 중에 운전자가 제동압력을 노면상태보다 크게 하거나 노면조건이 변화되어 제동압력으로 발생하는 브레이크(60,61,62,63)에서의 마찰력이 차량의 타이어나 노면에서 발생하는 제동력보다 크게 되면 차량의 바퀴는 노면에서 미끄러져가는 현상이 발생한다. 이에 따라 차량은 조향력을 상실하고 제동거리가 증가함은 물론이며, 차량이 회전하는 현상이 발생되므로 ABS제어가 필요하다. 이러한 ABS는 증압, 감압, 유지 등 3가지 모드로 제어되며, 각각의 제어상태는 차량의 바퀴 4개에 모두 같은 상태로 조절되는 것이 아니고 노면조건과 ABS 제어상태에 따라 별개로 제어, 즉 3가지 모드가 섞여서 제어된다.Meanwhile, the brakes 60, 61, 62, 63 generated by the braking pressure when the driver makes the braking pressure larger than the road surface state or the road surface conditions are changed while controlling the braking force increase / hold state for the purpose of deceleration or stop while driving the vehicle. When the frictional force of Ess is greater than the braking force generated from the tire or the road surface of the vehicle, the wheels of the vehicle slide on the road surface. Accordingly, the vehicle loses steering power and increases the braking distance, and also requires ABS control because the vehicle rotates. The ABS is controlled in three modes, such as boost, depressurization, and maintenance, and each control state is not controlled to the same state on all four wheels of the vehicle, but is separately controlled according to the road condition and the ABS control state. The modes are mixed and controlled.

먼저, 본 발명에 따른 차량용 안티록 브레이크 시스템의 압력감압작동을 설명한다. 제동이 수행되고 있는 상태에서 브레이크(60,61,62,63) 내의 제동압력을 노면조건보다 크면 적정압력으로 낮추어야 한다. 이에 따라 전기제어장치(80)에서는 노말클로즈형 솔레노이드밸브(40,41,42,43)를 개방 작동시킴으로써, 전륜(FR,FL)측과 후륜(RR,RL)측의 브레이크(60,61,62,63)로부터 토출되는 오일은 복귀유압라인(70)을 통해 오일저장탱크(31)로 유입 일시적으로 저장된다. 이 때, 각각의 노말클로즈형 솔레노이드밸브(40,41,42,43)의 개방작동은 동시 또는 각각 수행된다. 이러한 과정을 통해 전륜(FR,FL)과 후륜(RR,RL)측에 장착된 브레이크(60,61,62,63)의 압력이 낮아져서 노면에서 미끄러지는 현상이 방지된다.First, the pressure reduction operation of the vehicle anti-lock brake system according to the present invention will be described. If the braking pressure in the brakes (60, 61, 62, 63) is greater than the road surface conditions in the state that braking is being performed, it should be lowered to the appropriate pressure. Accordingly, in the electric control device 80, the normal closed solenoid valves 40, 41, 42, 43 are opened to operate, so that the brakes 60, 61, on the front wheel FR, FL side and the rear wheel RR, RL side are opened. The oil discharged from 62 and 63 is temporarily stored in the oil storage tank 31 through the return hydraulic line 70. At this time, the opening operation of each normal closed solenoid valve 40, 41, 42, 43 is performed simultaneously or separately. Through this process, the pressures of the brakes 60, 61, 62, and 63 mounted on the front wheels FR and FL and the rear wheels RR and RL are lowered, thereby preventing the sliding of the road surface.

그리고 본 발명에 따른 차량용 안티록 브레이크 시스템의 압력증압작동은 다음과 같다. ABS 제어중 ABS 감압상태가 오래 지속되거나 차량이 진행되어 노면의 마찰계수가 높은 곳으로 이동하면 브레이크(60,61,62,63) 내에 있는 제동압력으로 제동을 할 수 있는 것보다 차량 타이어와 노면에서 발생시킬 수 있는 마찰력이 증가되어 차량 제동효율이 떨어진다. 이러한 경우에는 각 휠센서(81)로부터 입력되는 신호를 근거로 전기제어장치(80)에서 상황을 판단, 브레이크(60,61,62,63) 내의 제동압력을 증가시키기 위해 공압밸브(21)를 개방작동시킨다. 이에 따라 배력장치(20)에서는 브레이크패달(10)의 작동에 의해 발생되는 배력보다 더한 힘이 배력으로 발생되고, 이러한 힘에 의해 마스터실린더(30)에서는 강한 제동유압이 형성된다. 이러한 제동유압은 개방작동된 노말오픈형 솔레노이드밸브(50,51,52,53)를 통해 브레이크(60,61,62,63)로 전달됨으로써, 제동유압을 증가시키게 된다.And the pressure-increasing operation of the vehicle anti-lock brake system according to the present invention is as follows. If the ABS depressurization state lasts for a long time during ABS control or the vehicle moves to a place where the friction coefficient of the road surface is high, the vehicle tires and the road surface may be braked with the braking pressure in the brakes 60, 61, 62, and 63 The friction force that can be generated in the car increases, which reduces the braking efficiency of the vehicle. In this case, the electric controller 80 determines the situation based on the signals input from the wheel sensors 81, and the pneumatic valve 21 is increased to increase the braking pressure in the brakes 60, 61, 62, and 63. Open operation Accordingly, in the power supply apparatus 20, a force greater than the power generated by the operation of the brake pedal 10 is generated as the back force, and a strong braking hydraulic pressure is formed in the master cylinder 30 by this force. The braking hydraulic pressure is transmitted to the brakes 60, 61, 62, and 63 through the normally operated solenoid valves 50, 51, 52, and 53 that are opened, thereby increasing the braking hydraulic pressure.

그리고 ABS 제어 중에서 브레이크(60,61,62,63) 내의 압력이 최적의 제동력을 발생시키는 최적의 압력에 이르거나, ABS 제어중에서 파생되는 차량의 공진현상을 방지하기 위해서는 압력을 일정상태로 유지하는 작동상태가 필요한데, 본 발명에 따른 안티록 브레이크 시스템의 압력유지작동은 다음과 같다. 차량의 전륜(FR,FL)과 후륜(RR,RL)에 장착된 브레이크(60,61,62,63) 내의 압력변화를 없게 하는 압력유지상태는 노말오픈형 솔레노이드밸브(50,51,52,53) 중에서 압력을 유지하고자 하는 브레이크(60,61,62,63) 측의 노말오픈형 솔레노이드밸브(50,51,52,53)를 폐쇄 작동시켜 유압이 전달되는 것을 차단한다.In the ABS control, the pressure in the brakes 60, 61, 62 and 63 reaches the optimum pressure for generating the optimum braking force, or the pressure is kept constant to prevent the resonance of the vehicle derived from the ABS control. An operating condition is required, the pressure holding operation of the anti-lock brake system according to the present invention is as follows. Normally open solenoid valves (50, 51, 52, 53) are used to maintain the pressure change in the brakes (60, 61, 62, 63) mounted on the front wheels (FR, FL) and rear wheels (RR, RL) of the vehicle. ) Closes the normally open solenoid valve (50, 51, 52, 53) of the brake (60, 61, 62, 63) to maintain the pressure to block the transmission of hydraulic pressure.

따라서 이러한 본 발명에 따른 안티록 브레이크 시스템의 제동작동중 ABS 증압제동작용은 배력장치(20)에 마련된 공압밸브(21)의 개폐작동에 의해 수행되며, 감압제동작용시 노말클로즈형 솔레노이드밸브(40,41,42,43)가 개방작동되어 브레이크(60,61,62,63)측에서 빠져나온 오일은 복귀유압라인(70)을 통해 오일저장탱크(31)에 저장된다. 결국, 모듈레이터의 몸체(미도시)에는 종래 제1,제2저압어큐뮤레이터와 제1,제2저압어큐뮤레이터 및 제1,제2펌프 등이 필요 없기 때문에, 전체적인 사이즈를 줄일 수 있다.Therefore, the ABS pressure-increasing braking action during the braking operation of the anti-lock brake system according to the present invention is performed by the opening and closing operation of the pneumatic valve 21 provided in the power supply device 20, and the normal closed solenoid valve during the decompression braking action ( 40, 41, 42, 43 is opened and the oil exiting from the brake (60, 61, 62, 63) side is stored in the oil storage tank 31 through the return hydraulic line (70). As a result, since the body of the modulator (not shown) does not need the first and second low pressure accumulators, the first and second low pressure accumulators, and the first and second pumps, the overall size can be reduced.

이상에서 상세히 설명한 바와 같이, 본 발명에 따른 안티록 브레이크 시스템은 전기제어장치에 의해 제어되는 공압밸브를 부스터에 설치함으로써, 증압 모드시 공압밸브의 개방작동에 따라 상대적으로 강한 배력이 발생되며 이러한 힘을 전달받아 마스터실린더에서 제동유압이 강하게 형성 브레이크로 전달되어 ABS제어의 증압제동작용이 수행된다. 이에 따라 종래 저압어큐뮤레이터와 고압어큐뮤레이터 및 펌프 등이 필요없게 되어 부품수가 줄고, 또한 모듈레이터의 몸체 크기를 줄여 콤팩트화 할 수 있는 이점이 있다.As described in detail above, the anti-lock brake system according to the present invention, by installing a pneumatic valve controlled by the electric control device in the booster, a relatively strong power is generated in accordance with the opening operation of the pneumatic valve in the boosting mode, such a force The braking hydraulic pressure is strongly transmitted from the master cylinder to the brake, and the pressure-induced braking action of the ABS control is performed. As a result, the conventional low pressure accumulator, the high pressure accumulator, and the pump are not required, thereby reducing the number of parts and further reducing the body size of the modulator.

Claims (2)

브레이크패달(10)의 작동에 따라 외부공기가 유입되어 기압차에 의해 배력이 형성되는 배력장치(20), 상기 배력장치(20)로부터 전달되는 힘에 의해 제동유압을 형성하는 오일저장탱크(31)가 마련된 마스터실린더(30), 차량의 전륜(FR,FL)과 후륜(RR,RL)에 각각 마련되며 제동유압을 전달받아 제동력을 발휘하는 브레이크(60,61,62,63), 상기 브레이크(60,61,62,63)의 입구측과 출구측에 각각 마련되어 유압의 흐름을 제어하는 노말오픈형 솔레노이드밸브(50,51,52,53)와 노말클로즈형 솔레노이드밸브(40,41,42,43), 상기 노말오픈형 솔레노이드밸브(50,51,52,53)와 상기 노말오픈형 솔레노이드밸브(40,41,42,43)의 개폐작동을 제어하는 전기제어장치(80)를 갖춘 안티록 브레이크 시스템에 있어서,An external air flows in accordance with the operation of the brake pedal 10 and the power storage device 20 is formed by the pressure difference, and an oil storage tank 31 which forms a braking hydraulic pressure by the force transmitted from the power supply device 20. ) Is provided in the master cylinder 30, the front wheels (FR, FL) and the rear wheels (RR, RL) of the vehicle, respectively, the brakes (60, 61, 62, 63) to exert braking force by receiving braking hydraulic pressure, the brake Normally open solenoid valves (50, 51, 52, 53) and normal closed solenoid valves (40, 41, 42) are provided at the inlet and outlet sides of (60, 61, 62, 63) to control hydraulic flow. 43), an anti-lock brake system having an electric control device (80) for controlling the opening and closing operations of the normally open solenoid valves (50, 51, 52, 53) and the normal open solenoid valves (40, 41, 42, 43). To 상기 배력장치(20)에는 부압원과 연결되며 상기 배력장치(20)에서 배력이 형성되도록 상기 전기제어장치(80)에 의해 개폐작동되는 공압밸브(21)가 마련되는 것을 특징으로 하는 안티록 브레이크 시스템.The anti-lock brake is connected to the negative pressure source and is provided with a pneumatic valve 21 which is opened and closed by the electric control device 80 so that the boosting force is formed in the boosting device 20. system. 제 1항에 있어서,The method of claim 1, 일단부는 상기 노말클로즈형 솔레노이드밸브(40,41,42,43)의 출구측과 연결되며 타단부는 상기 오일저장탱크(31)와 연결되는 복귀유압라인(70)이 마련되어 감압제동작용시 상기 노말클로즈형 솔레노이드밸브(40,41,42,43)의 개방작동에 따라 상기 브레이크(60,61,62,63)에서 빠져나오는 오일이 상기 복귀유압라인(70)을 통해 상기 오일저장탱크(31)로 유입되는 것을 특징으로 하는 안티록 브레이크 시스템.One end is connected to the outlet side of the normal closed solenoid valves (40, 41, 42, 43) and the other end is provided with a return hydraulic line (70) connected to the oil storage tank (31) during the decompression braking operation Oil coming out of the brakes (60, 61, 62, 63) in accordance with the opening operation of the closed solenoid valve (40, 41, 42, 43) through the return hydraulic line (70) the oil storage tank (31) Anti-lock brake system, characterized in that the flow into.
KR1019970075530A 1997-12-27 1997-12-27 Anti-lock brake system for vehicle KR100328228B1 (en)

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