KR100331657B1 - Anti-lock brake system for vehicle - Google Patents

Anti-lock brake system for vehicle Download PDF

Info

Publication number
KR100331657B1
KR100331657B1 KR1019970075527A KR19970075527A KR100331657B1 KR 100331657 B1 KR100331657 B1 KR 100331657B1 KR 1019970075527 A KR1019970075527 A KR 1019970075527A KR 19970075527 A KR19970075527 A KR 19970075527A KR 100331657 B1 KR100331657 B1 KR 100331657B1
Authority
KR
South Korea
Prior art keywords
storage tank
oil
oil storage
brake system
hydraulic line
Prior art date
Application number
KR1019970075527A
Other languages
Korean (ko)
Other versions
KR19990055575A (en
Inventor
경 일 박
Original Assignee
밍 루
주식회사 만도
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 밍 루, 주식회사 만도 filed Critical 밍 루
Priority to KR1019970075527A priority Critical patent/KR100331657B1/en
Publication of KR19990055575A publication Critical patent/KR19990055575A/en
Application granted granted Critical
Publication of KR100331657B1 publication Critical patent/KR100331657B1/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • B60T13/14—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using accumulators or reservoirs fed by pumps
    • 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
    • B60Y2400/40—Actuators for moving a controlled member
    • B60Y2400/404—Electro-magnetic actuators, e.g. with an electromagnet not rotating for moving a clutching member
    • B60Y2400/4045—Electro-magnetic valves, i.e. solenoids
    • 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

Abstract

PURPOSE: An anti-lock brake system for a vehicle is provided to guide oil coming out from a brake side in a decompression mode by installing a restoring hydraulic line directly connecting a discharge outlet of a normal close shape-solenoid valve and an oil storage tank. CONSTITUTION: An anti-lock brake system for a vehicle comprises a master cylinder(30) equipped with an oil storage tank(31) forming braking hydraulic pressure according to the operation of a brake pedal(10); brakes(90,91,92,93) performing damping force through braking hydraulic pressure, with disposed to the front wheels and rear wheels of a vehicle; and normal open solenoid valves(50,51,52) and normal close solenoid valves(40,41,42) for controlling the flowing of hydraulic pressure, with disposed at the inlet and outlet sides of the brakes. An end of a restoring hydraulic line(60) connected with a discharge outlet side of the normal close solenoid valves and the other end is connected with the oil storage tank. If the normal close solenoid valves are opened according to decompression-damping actions, oil discharged from the brakes flows into the oil storage tank along the restoring hydraulic line.

Description

차량용 안티록 브레이크 시스템Automotive Antilock Brake System

본 발명은 차량용 안티록 브레이크 시스템에 관한 것으로, 더욱 상세하게는 감압모드시 노말클로즈형 솔레노이드밸브가 개방작동되어 각 브레이크로부터 빠져나온 오일이 오일저장탱크에 일시 저장되도록 안내하는 복귀유압라인에 관한 것이다.The present invention relates to an anti-lock brake system for a vehicle, and more particularly, to a return hydraulic line for guiding oil closed from each brake to be temporarily stored in an oil storage tank when the normal-closed solenoid valve is opened in the decompression mode. .

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(1a)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 (1a) and an oil storage tank (3a) for forming a braking hydraulic pressure to deliver to the brakes (9a, 9b, 9c, 9d).

배력장치(1a)는 진공과 대기와의 압력차이를 이용하여 작은 힘으로 큰 제동력을 발생시키는 장치로서, 운전석에 마련된 브레이크패달(1)과 연계되어 이에 의해 작동된다. 마스터실린더(3)는 배력장치(1a)로부터 증폭된 힘을 전달받아 제동유압을 형성하는 것으로, 각 브레이크(9a,9b,9c,9d)와는 유압라인을 통해 연결되어 있다.The power booster 1a 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 linked with the brake pedal 1 provided in the driver's seat. The master cylinder 3 receives the amplified force from the power booster 1a to form a braking hydraulic pressure, and is connected to each of 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)와 출구측에 배치되는 노말클로즈형 솔레노이드밸브(4a,4b,4c)로 구별되며, 전기제어장치(E.C.U,2)에 의해 제어됨으로써 강력하고 안정된 제동력을 발휘하게 된다. 이 때, 전기제어장치(2)는 전륜(FR,FL)과 후륜(RR,RL)에 마련된 휠센서(2a)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 and 5c disposed at the inlet side and normal-closed solenoid valves 4a, 4b and 4c disposed at the outlet side and controlled by the electric control unit ECU 2 This results in a strong and stable braking force. At this time, the electric controller 2 detects the vehicle speed through the wheel sensors 2a provided on the front wheels FR and FL and the rear wheels RR and RL, and controls them.

그리고 전륜(FR,FL)측과 후륜(RR,RL)측의 노말클로즈형 솔레노이드밸브(4a,4b,4c)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 and 4c on the front wheels FR and FL and the rear wheels RR and RL. 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)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. The hydraulic pressure is transmitted to the respective brakes 9a, 9b, 9c, and 9d provided on the front wheels FR and FL and the rear wheels RR and RL through the normally open solenoid valves 5a, 5b, and 5c to perform a braking action. do.

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(2a)가 감지하고 이를 안티록 브레이크 시스템의 전기제어장치(2)에 전달한다. 이에 따라 전기제어장치(2)에서는 노말클로즈형 솔레노이드밸브(4a,4b,4c)가 개방되도록 작동시켜 브레이크(9a,9b,9c,9d) 내의 오일을 제거함으로써 제동압력을 낮춘다. 그리고 노말클로즈형 솔레노이드밸브(4a,4b,4c)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)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. The sensor 2a detects and transmits it to the electric control device 2 of the antilock brake system. Accordingly, the electric control device 2 operates to open the normal closed solenoid valves 4a, 4b, and 4c to remove the oil in the brakes 9a, 9b, 9c, and 9d, thereby lowering the braking pressure. The oil discharged through the normal closed solenoid valves 4a, 4b, and 4c is moved to the first and second low pressure accumulators 6a and 6b, and is temporarily stored. As the motor 7 is driven, the oil is discharged. The pressure rises again through the second pumps 7a and 7b to 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. It will cycle.

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 마련되는데, 저압어큐뮬레이터(6a,6b)가 2개로 각각 구성되기 때문에 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. Although not provided), the low pressure accumulators 6a and 6b are provided in two, respectively, so that there is a limit to the compactness of the modulator (not shown).

본 발명은 이러한 문제점을 해결하기 위한 것으로, 본 발명의 목적은 복귀유압라인의 일단부를 각 브레이크의 노말클로즈형 솔레노이드밸브측 유압라인과 연결하고, 이의 타단부는 마스터실린더 상부에 마련된 오일저장탱크와 연결함으로써, 감압모드시 각 브레이크측에서 빠져나오는 오일이 복귀유압라인을 통해 곧바로 오일저장탱크로 유입되어 압력 맥동이 줄어들어 저압어큐뮤레이터가 필요없는 안티록 브레이크 시스템을 제공하는 것이다.The present invention has been made to solve this problem, and an object of the present invention is to connect one end of the return hydraulic line with the normal closed solenoid valve side hydraulic line of each brake, and the other end thereof with the oil storage tank provided at the upper part of the master cylinder. By connecting, the oil coming out of each brake side in the decompression mode flows directly into the oil storage tank through the return hydraulic line to reduce the pressure pulsation, thereby providing an anti-lock brake system without the need for a low pressure accumulator.

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.

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

10..브레이크패달 20..전자제어장치 30..마스터실린더10. Brake pedal 20. Electronic control device 30. Master cylinder

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

60..복귀유압라인 70..모터 71,72..펌프60. Return hydraulic line 70. Motor 71, 72 Pump

80,81..고압어큐뮤레이터High Pressure Accumulator

이러한 목적을 달성하기 위한 본 발명은, 브레이크패달의 작동에 따라 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 솔레노이드밸브를 갖춘 안티록 브레이크 시스템에 있어서,The present invention for achieving the above object is, the master cylinder is provided with an oil storage tank for forming the braking hydraulic pressure in accordance with the operation of the brake pedal, respectively provided on the front and rear wheels of the vehicle brake and brake to deliver the braking force by receiving the braking hydraulic pressure In the anti-lock brake system having a normal open solenoid valve and a normal closed solenoid valve provided on the inlet side and the outlet side of the valve to control hydraulic flow,

일단부는 노말클로즈형 솔레노이드밸브의 토출구측과 연결되며 타단부는 오일저장탱크와 연결되는 복귀유압라인이 마련되어 감압제동작용에 따라 노말클로즈형 솔레노이드밸브가 개방작동되면 브레이크에서 빠져나오는 오일이 복귀유압라인을 따라 오일저장탱크로 유입되어 저장되는 것을 특징으로 한다.One end is connected to the discharge port side of the normal-closed solenoid valve, and the other end is provided with a return hydraulic line connected to the oil storage tank. It is characterized by being introduced into the oil storage tank is stored along.

이하, 본 발명에 따른 하나의 바람직한 실시예를 첨부도면을 참조하여 상세히 설명한다. 도 2는 본 발명에 따른 안티록 브레이크 시스템을 개략적으로 보인 계통도이다.Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings. 2 is a schematic diagram of an antilock brake system according to the present invention.

본 발명에 따른 안티록 브레이크 시스템은 이에 도시한 바와 같이, 전륜(FR,FL)과 후륜(RR,RL)에 각각 설치된 브레이크(90,91,92,93)와 운전석 일측에 마련된 브레이크패달(10), 패달(10)의 작동에 의해 배력을 형성하며 이에 의해 제동유압이 발생되도록 배력장치(11)와 오일저장탱크(31)가 마련된 마스터실린더(30)가 구성되어 있다. 각 브레이크(90,91,92,93)의 입구측과 출구측에는 각각 유압의 흐름을 제어하도록 솔레노이드밸브가 설치되는데, 이것은 입구측에 설치된 노말오픈형 솔레노이드밸브(50,51,52)와 출구측에 마련된 노말클로즈형 솔레노이드밸브(40,41,42)로 구별된다.The anti-lock brake system according to the present invention, as shown therein, brakes 90, 91, 92, 93 provided on the front wheels FR, FL and the rear wheels RR, RL and brake pedals 10 provided on one side of the driver's seat, respectively. ), The master cylinder 30 is provided with the boosting device 11 and the oil storage tank 31 so that the braking hydraulic pressure is generated by the operation of the pedal 10. Solenoid valves are installed on the inlet and outlet sides of the brakes 90, 91, 92, and 93, respectively, to control the flow of hydraulic pressure, which is provided on the inlet side of the normally open solenoid valves 50, 51, 52 and the outlet side. Normally closed solenoid valves (40, 41, 42) are provided.

그리고 전륜(FR,FL)측과 후륜(RR,RL)측의 노말클로즈형 솔레노이드밸브(40,41,42)의 토출구측과 오일저장탱크(31)를 연결하는 복귀유압라인(60)이 마련되어 있으며, 복귀유압라인(60)과 마스터실린더(31)를 연결하는 유압라인에는 압력맥동을 줄이기 위한 제1,제2고압어큐뮤레이터(80,81)가 각각 설치되어 있다. 따라서 감압제동에 따른 노말클로즈형 솔레노이드밸브(40,41,42)의 개방작동시 전륜(FR,FL)측과 후륜(RR,RL)측 브레이크(90,91,92,93)로부터 토출되는 오일은 복귀유압라인(60)을 통해 오일저장탱크(31)에 일시 저장된다. 아울러 복귀유압라인(60)과 제1,제2고압어큐뮤레이터(80,81) 사이에 마련된 모터(70)의 구동에 의해 제1,제2펌프(71,72)가 작동되어 오일저장탱크(31)에 저장된 오일이 가압되어 제1,제2고압어큐뮤레이터(80,81)로 토출 저장된다. 그리고 제1,제2고압어큐뮤레이터(80,81)에 저장된 오일은 유압라인을 따라 다시 브레이크(90.91.92.93) 측으로 전달되거나 마스터실린더(30)로 복귀된다. 이를 위해 제1펌프(71)와 제2펌프(72)의 유입구측에는 각각 복귀유압라인(60)과 연결된 유압라인(61,62)이 별도로 마련되어 있어서, 오일저장탱크(31) 내의 오일이 제1펌프(71)와 제2펌프(72)로 각각 공급된다.In addition, a return hydraulic line 60 is provided to connect the discharge port side of the normal closed solenoid valves 40, 41, and 42 and the oil storage tank 31 on the front wheel FR, FL side and the rear wheel RR, RL side. The hydraulic line connecting the return hydraulic line 60 and the master cylinder 31 is provided with first and second high pressure accumulators 80 and 81 for reducing pressure pulsations, respectively. Therefore, the oil discharged from the front wheel (FR, FL) and the rear wheel (RR, RL) side brakes (90, 91, 92, 93) during the opening operation of the normal closed solenoid valves (40, 41, 42) according to the decompression braking Is temporarily stored in the oil storage tank 31 through the return hydraulic line (60). In addition, the first and second pumps 71 and 72 are operated by driving the motor 70 provided between the return hydraulic line 60 and the first and second high pressure accumulators 80 and 81 to operate the oil storage tank. The oil stored in the 31 is pressurized and discharged and stored in the first and second high pressure accumulators 80 and 81. The oil stored in the first and second high pressure accumulators 80 and 81 is transferred to the brake 90.91.92.93 side along the hydraulic line or returned to the master cylinder 30. To this end, hydraulic lines 61 and 62 connected to the return hydraulic line 60 are separately provided at the inlet sides of the first pump 71 and the second pump 72, so that oil in the oil storage tank 31 is firstly discharged. It is supplied to the pump 71 and the 2nd pump 72, respectively.

한편, 모터(70)의 구동과 각 솔레노이드밸브의 모든 개폐작동은 전기제어장치(20)에 의해 이루어지는데, 이것은 각 전륜(FR,FL)과 후륜(RR,RL)에 설치된 휠센서(21)를 통해 입력된 신호를 근거로 제동압력과 상승속도를 제어한다.On the other hand, the driving of the motor 70 and all opening and closing operations of each solenoid valve are performed by the electric control device 20, which is the wheel sensor 21 installed on each front wheel FR, FL and rear wheels RR, RL. Controls the braking pressure and the rising speed based on the signal input through.

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(11)에서 입력보다 증폭된 배력이 형성되고 이를 통해 마스터실린더(30)에서는 상당한 압력의 제동유압이 발생된다. 이러한 제동유압은 노말오픈형 솔레노이드밸브(50,51,52)를 통해 전륜(FR,FL)과 후륜(RR,RL)에 마련된 각 브레이크(90,91,92,93)로 전달됨으로써, 제동작용이 이루어진다. 그리고 운전자가 브레이크패달(10)에서 조금씩 또는 완전하게 발을 떼게 되면, 각 브레이크(90,91,92,93) 내의 오일압력은 노말오픈형 솔레노이드밸브(50,51,52)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, the boosting power amplified than the input from the boosting device 11 is formed, and thus, the braking hydraulic pressure of a considerable pressure is generated in the master cylinder 30. The braking hydraulic pressure is transmitted to each of the brakes 90, 91, 92, and 93 provided on the front wheels FR, FL and the rear wheels RR, RL through the normally open solenoid valves 50, 51, and 52. Is done. When the driver releases the brake pedal 10 little by little or completely, the oil pressure in each brake 90, 91, 92, 93 is returned to the master cylinder through the normal-open solenoid valves 50, 51, 52. The braking force 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(90,91,92,93)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.On the other hand, brakes (90, 91, 92, 93) generated by the braking pressure when the driver increases the braking pressure than the road surface state or changes the road surface condition while controlling the braking force increase / hold state for the purpose of deceleration or stopping 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(90,91,92,93) 내의 제동압력을 노면조건보다 크면 적정압력으로 낮추어야 한다. 이에 따라 전기제어장치(20)에서는 노말클로즈형 솔레노이드밸브(40,41,42)를 개방 작동시킴으로써, 전륜(FR,FL)측과 후륜(RR,RL)측의 브레이크(90,91,92,93)로부터 토출되는 오일은 복귀유압라인(60)을 통해 오일저장탱크(31)로 유입 일시적으로 저장된다. 이 때, 각각의 노말클로즈형 솔레노이드밸브(40,41,42)의 개방작동은 동시 또는 각각 수행된다. 이러한 과정을 통해 전륜(FR,FL)과 후륜(RR,RL)측에 장착된 브레이크(90,91,92,93)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 90, 91, 92, 93 is greater than the road surface condition, the braking pressure should be lowered to the appropriate pressure. Accordingly, in the electric control device 20, the normal closed solenoid valves 40, 41, 42 are opened to operate, so that the brakes 90, 91, 92, on the front wheel FR, FL and rear wheels RR, RL, The oil discharged from 93 is temporarily stored in the oil storage tank 31 through the return hydraulic line 60. At this time, the opening operation of each normal closed solenoid valve 40, 41, 42 is performed simultaneously or separately. Through this process, the pressures of the brakes 90, 91, 92, and 93 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(90,91,92,93) 내에 있는 제동압력으로 제동을 할 수 있는 것보다 차량 타이어와 노면에서 발생시킬 수 있는 마찰력이 증가되어 차량 제동효율이 떨어진다. 이러한 경우에는 각 휠센서(21)로부터 입력되는 신호를 근거로 전기제어장치(20)에서 상황을 판단, 브레이크(90,91,92,93) 내의 제동압력을 증가시키기 위해 모터(70)를 구동 제1,제2펌프(71,72)를 작동시킨다. 이에 따라 ABS감압작동시 오일저장탱크(31)에 저장된 오일은 복귀유압라인(60) 및 유압라인(61,62)을 통해 제1,제2펌프(71,72)로 유입되고 계속하여 제1,제2고압어큐뮤레이터(80,81) 내부로 가압되어 공급된다. 그리고 이것은 개방작동된 노말오픈형 솔레노이드밸브(50,51,52)를 통해 브레이크(90,91,92,93)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 or the vehicle progresses and moves to a place where the friction coefficient of the road is high, the vehicle tires and the road surface can be braked by the braking pressure in the brakes 90, 91, 92, and 93. 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 20 determines the situation based on the signals input from each wheel sensor 21 and drives the motor 70 to increase the braking pressure in the brakes 90, 91, 92, and 93. The first and second pumps 71 and 72 are operated. Accordingly, the oil stored in the oil storage tank 31 during the ABS pressure reduction operation flows into the first and second pumps 71 and 72 through the return hydraulic line 60 and the hydraulic lines 61 and 62, and then continues with the first. The pressure is supplied to the second high pressure accumulators 80 and 81. And this is transmitted to the brake (90, 91, 92, 93) through the open-acting normal open solenoid valve (50, 51, 52), thereby increasing the braking hydraulic pressure.

그리고 ABS 제어 중에서 브레이크(90,91,92,93) 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(90,91,92,93) 내의 압력변화를 없게하는 압력유지상태는 노말오픈형 솔레노이드밸브(50,51,52) 중에서 압력을 유지하고자 하는 브레이크(90,91,92,93) 측의 노말오픈형 솔레노이드밸브(50,51,52)를 폐쇄작동시켜 유압이 전달되는 것을 차단하며, 제1,제2고압어큐뮤레이터(80,81)의 오일압력은 마스터실린더(30)측으로 전달된다.In the ABS control, the pressure in the brakes 90, 91, 92 and 93 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. The pressure holding state to prevent pressure change in the brakes 90, 91, 92, and 93 mounted on the front wheels FR, FL and rear wheels RR, RL of the vehicle is one of the normal open solenoid valves 50, 51, 52. Closing operation of the normally open solenoid valves (50, 51, 52) of the brake (90, 91, 92, 93) to maintain the pressure to block the transmission of the hydraulic pressure, the first, second high pressure accumulator ( The oil pressure of 80 and 81 is transmitted to the master cylinder 30 side.

따라서 이러한 본 발명에 따른 안티록 브레이크 시스템의 제동작동중 ABS감압작동시 노말클로즈형 솔레노이드밸브(40,41,42)가 개방작동되어 브레이크(90,91,92,93)측에서 빠져나온 오일은 복귀유압라인(60)을 통해 오일저장탱크(31)에 일시 저장되며, 제1,제2펌프(71,72)작동에 의해 다시 제1,제2고압어큐뮤레이터(80,81)로 가압 공급되는데, 여유있게 저장되어 있는 오일저장탱크(31)로부터 오일이 공급되기 때문에, 유속차에 따른 소음이 발생되지 않는다. 또한 모듈레이터의 몸체(미도시)에는 종래 제1,제2저압어큐뮤레이터가 필요없기 때문에, 전체적인 사이즈를 줄일 수 있다.Therefore, during the braking operation of the anti-lock brake system according to the present invention, the normal closed solenoid valves 40, 41, and 42 are opened and the oil is released from the brakes 90, 91, 92, 93. Temporarily stored in the oil storage tank 31 through the return hydraulic line 60, pressurized back to the first and second high pressure accumulators (80, 81) by the operation of the first and second pumps (71, 72). Although the oil is supplied from the oil storage tank 31 which is stored in a relaxed manner, noise due to the flow velocity difference does not occur. In addition, since the body of the modulator (not shown) conventionally does not require the first and second low pressure accumulators, the overall size can be reduced.

이상에서 상세히 설명한 바와 같이, 본 발명에 따른 안티록 브레이크 시스템은 복귀유압라인의 일단부를 각 브레이크 노말클로즈형 솔레노이드밸브측의 유압라인과 연결하고, 이의 타단부는 마스터실린더 상부에 마련된 오일저장탱크와 연결함으로써, 감압모드시 각 브레이크측에서 빠져나오는 오일이 복귀유압라인을 통해 곧바로 오일저장탱크로 유입되어 압력 맥동이 줄어들게 된다. 이에 따라 종래 제1,제2저압어큐뮤레이터가 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 connects one end of the return hydraulic line with the hydraulic line on each brake normal-closed solenoid valve side, and the other end thereof with the oil storage tank provided on the upper part of the master cylinder. By connecting, the oil coming out of each brake side in the decompression mode flows directly into the oil storage tank through the return hydraulic line, thereby reducing the pressure pulsation. This eliminates the need for the first and second low pressure accumulators, thereby reducing the number of parts and further reducing the body size of the modulator.

Claims (2)

브레이크패달(10)의 작동에 따라 제동유압을 형성하는 오일저장탱크(31)가 마련된 마스터실린더(30), 차량의 전륜(FR,FL)과 후륜(RR,RL)에 각각 마련되며 제동유압을 전달받아 제동력을 발휘하는 브레이크(90,91,92,93), 상기 브레이크(90,91,92,93)의 입구측과 출구측에 각각 마련되어 유압의 흐름을 제어하는 노말오픈형 솔레노이드밸브(50,51,52)와 노말클로즈형 솔레노이드밸브(40,41,42)를 갖춘 안티록 브레이크 시스템에 있어서,The master cylinder 30 is provided with an oil storage tank 31 for forming braking hydraulic pressure according to the operation of the brake pedal 10, and is provided on the front wheels FR and FL and rear wheels RR and RL of the vehicle, respectively. Brake (90, 91, 92, 93) to receive the braking force is provided, the normal open solenoid valve (50, which is provided on the inlet and outlet side of the brake (90, 91, 92, 93), respectively, to control the flow of hydraulic pressure) In the anti-lock brake system having 51, 52 and normal closed solenoid valves (40, 41, 42), 일단부는 상기 노말클로즈형 솔레노이드밸브(40,41,42)의 토출구측과 연결되며 타단부는 상기 오일저장탱크(31)와 연결되는 복귀유압라인(60)이 마련되어 감압제동작용에 따라 상기 노말클로즈형 솔레노이드밸브(40,41,42)가 개방작동되면 상기 브레이크(90.91,92,93)에서 빠져나오는 오일이 상기 복귀유압라인(60)을 따라 상기 오일저장탱크(31)로 유입되어 저장되는 것을 특징으로 하는 안티록 브레이크 시스템.One end is connected to the discharge port side of the normal closed solenoid valves (40, 41, 42) and the other end is provided with a return hydraulic line (60) connected to the oil storage tank (31) in accordance with the decompression braking action When the solenoid valve (40, 41, 42) is opened, the oil coming out of the brakes (90.91, 92, 93) is introduced into the oil storage tank 31 along the return hydraulic line (60) to be stored. Featuring anti-lock brake system. 제 1항에 있어서, 제1,제2펌프(71,72)작동에 의해 오일이 가압 유입되며 이것을 다시 필요에 따라 상기 브레이크(90,91,92,93)측과 상기 마스터실린더(30)로 토출시키는 제1,제2고압어큐뮤레이터(80,81)가 마련되며,According to claim 1, the oil is pressurized by the operation of the first and second pumps (71, 72) and this is again supplied to the brake (90, 91, 92, 93) side and the master cylinder 30 as necessary First and second high pressure accumulators 80 and 81 for discharging are provided, 상기 복귀유압라인(60)과 연결되어 증압제동작용시 상기 오일저장탱크(31) 내부의 오일을 상기 제1펌프(71)와 상기 제2펌프(72)로 유입 안내하는 유압라인(61,62)을 구비하는 것을 특징으로 하는 안티록 브레이크 시스템.A hydraulic line 61 connected to the return hydraulic line 60 to guide the oil in the oil storage tank 31 to the first pump 71 and the second pump 72 during a boost braking operation; 62) anti-lock brake system characterized in that it comprises.
KR1019970075527A 1997-12-27 1997-12-27 Anti-lock brake system for vehicle KR100331657B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019970075527A KR100331657B1 (en) 1997-12-27 1997-12-27 Anti-lock brake system for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019970075527A KR100331657B1 (en) 1997-12-27 1997-12-27 Anti-lock brake system for vehicle

Publications (2)

Publication Number Publication Date
KR19990055575A KR19990055575A (en) 1999-07-15
KR100331657B1 true KR100331657B1 (en) 2002-05-09

Family

ID=37479365

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019970075527A KR100331657B1 (en) 1997-12-27 1997-12-27 Anti-lock brake system for vehicle

Country Status (1)

Country Link
KR (1) KR100331657B1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07315186A (en) * 1994-05-26 1995-12-05 Jidosha Kiki Co Ltd Brake control system
JPH0842674A (en) * 1994-07-29 1996-02-16 Mazda Motor Corp Control device for automatic transmission for vehicle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07315186A (en) * 1994-05-26 1995-12-05 Jidosha Kiki Co Ltd Brake control system
JPH0842674A (en) * 1994-07-29 1996-02-16 Mazda Motor Corp Control device for automatic transmission for vehicle

Also Published As

Publication number Publication date
KR19990055575A (en) 1999-07-15

Similar Documents

Publication Publication Date Title
US4729611A (en) Vehicular hydraulic brake system with anti-locking arrangement
US6199961B1 (en) Hydraulic vehicle brake system
JPH10508552A (en) Operation method of automobile brake device with antilock
US20130240303A1 (en) Electronic control brake system for vehicles
US5918949A (en) Brake system
JPH0639251B2 (en) Brake device with slip control for automobiles
CN211442275U (en) Hydraulic vehicle brake apparatus
KR100976216B1 (en) Brake System For a Vehicle
JPH04231247A (en) Braking pressure controller
US6132013A (en) Anti-lock and traction control braking system using non-driven wheel brake de-isolation
KR100331657B1 (en) Anti-lock brake system for vehicle
KR100328228B1 (en) Anti-lock brake system for vehicle
KR100344471B1 (en) Anti-lock brake system for vehicle
KR100352947B1 (en) Anti-lock brake system for vehicle
KR200296168Y1 (en) Automotive anti-lock brake system
KR200296170Y1 (en) Automotive Antilock Brake System
US5971502A (en) Secondary braking control
KR100379923B1 (en) Anti-lock brake system for vehicle
KR200278670Y1 (en) Automotive Antilock Brake System
KR100282187B1 (en) Automotive Antilock Brake System
KR100352948B1 (en) Anti-lock brake system for vehicle
KR200270855Y1 (en) Low pressure accumulator of vehicle anti-lock brake system
CN103303293A (en) Electronic control brake system for vehicles
KR100282188B1 (en) Automotive Antilock Brake System
JP3412233B2 (en) Hydraulic pressure control device

Legal Events

Date Code Title Description
A201 Request for examination
N231 Notification of change of applicant
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20051230

Year of fee payment: 5

LAPS Lapse due to unpaid annual fee