KR20030096954A - Vehicle's ABS control circuit - Google Patents

Vehicle's ABS control circuit

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Publication number
KR20030096954A
KR20030096954A KR1020020034057A KR20020034057A KR20030096954A KR 20030096954 A KR20030096954 A KR 20030096954A KR 1020020034057 A KR1020020034057 A KR 1020020034057A KR 20020034057 A KR20020034057 A KR 20020034057A KR 20030096954 A KR20030096954 A KR 20030096954A
Authority
KR
South Korea
Prior art keywords
brake
line
wheel
solenoid valve
reflux line
Prior art date
Application number
KR1020020034057A
Other languages
Korean (ko)
Other versions
KR100491919B1 (en
Inventor
안동호
Original Assignee
현대모비스 주식회사
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Application filed by 현대모비스 주식회사 filed Critical 현대모비스 주식회사
Priority to KR10-2002-0034057A priority Critical patent/KR100491919B1/en
Publication of KR20030096954A publication Critical patent/KR20030096954A/en
Application granted granted Critical
Publication of KR100491919B1 publication Critical patent/KR100491919B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • 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
    • B60Y2400/30—Sensors
    • B60Y2400/303—Speed sensors
    • B60Y2400/3032—Wheel speed sensors
    • 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: A control circuit of an ABS(Anti-Lock Brake System) for a vehicle is provided to remove a low-pressure accumulator at a reflux line, to supply a small-sized and lightweight ABS modulator block, and to cut down producing and assembling cost by reducing the number of components. CONSTITUTION: A control circuit of an ABS for a vehicle is composed of a brake line(30) for forming a passage supplying braking pressure generated in a master cylinder(10) to wheel brakes(20); an HCU(Hydraulic Control Unit) for controlling the brake line; an ECU(Electronic Control Unit) for controlling the HCU; a suction line(32) branched off from a reflux line(31) positioned at an inlet of a hydraulic pump(44) and connected with a storage tank(11) mounted to the master cylinder; and a check valve(60) installed at the upper part of the spot at which the suction line is branched off from the reflux line. The HCU includes inlet solenoid valves(41) installed to the brake line positioned at the upper part of the wheel brake and opened in normal times and outlet solenoid valves(42) installed to the reflux line positioned at the lower part of the wheel brake, normally closed. The ECU outputs an open-and-shut signal to the inlet and outlet solenoid valves and an operation signal to the hydraulic pump installed to the reflux line after receiving and computing a wheel speed signal from a speed sensor of wheels.

Description

차량 안티록 브레이크 시스템의 제어회로 { Vehicle's ABS control circuit }Control circuit of vehicle antilock brake system {Vehicle's ABS control circuit}

본 발명은 차량의 안티록 브레이크 시스템(ABS: Anti-lock break system)에사용되는 유압제어 회로에 관한 것으로서, 보다 구체적으로는 종래에 휠브레이크의 환류라인에서 설치되는 어큐뮬레이터를 대신하여 마스터실린더의 저장탱크와 연결되는 셕션라인이 설치되는 것에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic control circuit used in an anti-lock break system (ABS) of a vehicle, and more particularly, to a storage of a master cylinder instead of an accumulator installed in a reflux line of a wheel brake. It relates to the installation of a suction line connected to the tank.

일반적으로 안티록 브레이크 시스템(이하, 'ABS'라 한다)은 차량의 제동시에 차량의 자세안정성, 조향안정성, 제동거리를 최적화하기 위하여 슬립율이 대략 15∼20%로 되도록, 제동시에 휠브레이크의 제동압을 감압, 유지, 증압하는 시스템이다.In general, the anti-lock brake system (hereinafter referred to as 'ABS') has a slip ratio of approximately 15 to 20% for braking to optimize the vehicle's attitude stability, steering stability, and braking distance. It is a system to reduce, maintain and increase the braking pressure.

종래에는 도1에 도시되듯이, 운전자가 페달(12)을 밟는 경우에, 마스터실린더(10)와 배력장치(13)에 의해 형성된 제동압이 브레이크라인을 따라 휠브레이크(20)로 전달되어, 휠브레이크(20)가 작동되었다. ABS가 작동하여 감압되는 경우에는, 우선 아웃렛솔레노이드밸브(42)가 열려 휠브레이크의 작동유가 어큐물레이터(47)로 환류되어 휠브레이크(20)의 제동압이 감압되었다. 그러나, 종래의 어큐뮬레이터(47)는 부피가 크고, 부품수가 많아, 유압제어장치(HCU)와 전자제어장치(ECU)를 일체화한 한 묘듈레이터블럭을 소형, 경량화하기 어려운 문제점이 있었다.Conventionally, as shown in FIG. 1, when the driver presses the pedal 12, the braking pressure generated by the master cylinder 10 and the power booster 13 is transmitted to the wheel brake 20 along the brake line. The wheel brake 20 is activated. When the ABS is operated and the pressure is reduced, first, the outlet solenoid valve 42 is opened, and the hydraulic fluid of the wheel brake is refluxed to the accumulator 47 to reduce the braking pressure of the wheel brake 20. However, the conventional accumulator 47 has a problem that it is difficult to reduce the size and weight of a single-dimulator block in which the hydraulic control unit (HCU) and the electronic control unit (ECU) are integrated.

본 발명은 상기한 종래의 기술의 문제점을 해결하기 위해 안출된 것으로서, 환류라인에 저압어큐뮬레이터가 필요없는 저렴한 차량 안티록 브레이크 시스템(ABS)의 제어회로를 제공하는 것이다.SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and provides a control circuit of an inexpensive vehicle antilock brake system (ABS) that does not require a low pressure accumulator in a reflux line.

또한, 본 발명은 브레이크의 제동압의 급격한 압력변동으로 인한 소음이 저감되는 차량 안티록 브레이크 시스템의 제어회로를 제공하는 것이다.The present invention also provides a control circuit of a vehicle anti-lock brake system in which noise due to a sudden pressure change in braking pressure of a brake is reduced.

또한, 본 발명은 ABS 작동시 감압하는 경우에 갑작스런 감압에 의한 수격현상이 방지되고 연속적으로 감압되는 차량 안티록 브레이크 시스템의 제어회로를 제공하는 것이다.In addition, the present invention is to provide a control circuit of a vehicle anti-lock brake system that prevents water hammer due to sudden decompression when decompression during ABS operation and continuously depressurized.

도1은 종래의 안티록 브레이크 시스템에 사용되는 유압 제어회로도이다.1 is a hydraulic control circuit diagram used in a conventional anti-lock brake system.

도2는 본 발명의 실시예에 의한 안티록 브레이크 시스템에 사용되는 유압 제어회로도이다.2 is a hydraulic control circuit diagram used in the anti-lock brake system according to the embodiment of the present invention.

*도면의 주요기호에 대한 간략한 설명** Brief description of the major symbols in the drawings *

10...마스터실린더, 11...저장탱크, 12...페달, 13...배력장치,10 master cylinders, 11 storage tanks, 12 pedals, 13 power units,

20...휠브레이크,20 ... wheel brakes,

30...브레이크라인, 31...환류라인, 32...셕션라인,30 ... break line, 31 ... reflux line, 32 ... section line,

41...인렛솔레노이드밸브, 42...아웃렛솔레노이드밸브, 43...모터,41 inlet solenoid valve, 42 outlet solenoid valve, 43 motor,

44...유압펌프, 47...어큐뮬레이터44 hydraulic pump, 47 accumulator

60...체크밸브, 61...볼, 62...스프링60 ... check valve, 61 ... ball, 62 ... spring

상기한 발명의 목적을 달성하기 위하여, 본 발명은 저압어큐뮬레이터를 대체하여, 환류라인과 마스터실린더의 저장탱크가 셕션라인으로 연결된다.In order to achieve the above object, the present invention replaces the low pressure accumulator, the reflux line and the storage tank of the master cylinder is connected to the suction line.

본 발명은 마스터실린더에서 발생되는 제동압이 휠브레이크로 공급되는 통로를 형성하는 브레이크라인과, 상기 브레이크라인을 제어하는 유압제어장치(HCU)와, 상기 유압제어장치를 제어하는 전자제어장치(ECU)를 포함하는 차량 안티록 브레이크 시스템(ABS) 제어회로에 있어서, 상기 유압제어장치에는 휠브레이크의 상류측에 위치하는 브레이크라인에 설치되며 평상시 개방되어 있는 인렛솔레노이드밸브와, 상기 휠브레이크에 하류측에 위치하는 환류라인에 설치되며 평상시 닫혀있는 아웃렛솔레노이드밸브가 포함되며; 상기 전자제어장치는 휠의 속도센서에 의한 휠속도신호를 입력받아 연산한 후에 상기 인렛솔레노이드밸브, 아웃렛솔레노이드밸브에 개폐신호 및 상기 환류라인에 설치된 유압펌프에 작동신호를 출력하며; 상기 유압펌프의 입구측에 위치하는 환류라인에서 분기되어 상기 마스터실린더에 장착된 저장탱크와 연결되는 셕션라인이 설치되며; 상기 환류라인에서 상기 셕션라인이 분기되는 지점의 상류측에 체크밸브가 설치된다.The present invention provides a brake line for forming a passage through which the braking pressure generated in the master cylinder is supplied to the wheel brake, a hydraulic control unit (HCU) for controlling the brake line, and an electronic control unit (ECU) for controlling the hydraulic control unit. In the vehicle anti-lock brake system (ABS) control circuit comprising a), the hydraulic control device is installed in the brake line located upstream of the wheel brake, the inlet solenoid valve is normally open, and the downstream side to the wheel brake An outlet solenoid valve normally installed and closed at a reflux line located in the outlet; The electronic controller outputs an operation signal to the inlet solenoid valve and the outlet solenoid valve, the opening / closing signal and the hydraulic pump installed in the reflux line after calculating and receiving the wheel speed signal by the speed sensor of the wheel; A section line branched from a reflux line positioned at an inlet side of the hydraulic pump and connected to a storage tank mounted to the master cylinder is installed; A check valve is installed upstream of the point at which the section line branches from the reflux line.

이하, 첨부된 도면을 참고로 하여 본 발명의 바람직한 실시예에 대하여 설명한다.Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

도2에 도시되듯이, 본 발명에 의한 ABS의 제어회로는 크게 마스터실린더(10), 휠브레이크(20), 유압제어장치(HCU) 및 전자제어장치(ECU)로 구성되며, 유압의 작동라인은 브레이크라인(30), 환류라인(31), 셕션라인(32)으로 이루어진다.As shown in Figure 2, the control circuit of the ABS according to the present invention is largely composed of the master cylinder 10, the wheel brake 20, the hydraulic control unit (HCU) and the electronic control unit (ECU), the hydraulic operation line The break line 30, the reflux line 31, the cushion line 32 is composed of.

먼저, 브레이크라인(30)은 마스터실린더(10)의 출구에서 휠브레이크(20)의 입구까지 형성되는 유압라인이며, 운전자가 페달(13)을 밟는 경우에 마스터실린더(10)와 배력장치(12)에 의해 형성된 제동압이 휠브레이크(20)까지 전달되는 통로를 형성한다. 여기서, 휠브레이크(20)는 드럼식 브레이크 또는 디스크식 브레이크이다.First, the brake line 30 is a hydraulic line that is formed from the outlet of the master cylinder 10 to the inlet of the wheel brake 20, and the master cylinder 10 and the power booster 12 when the driver steps on the pedal 13. The brake pressure formed by) forms a passage that is transmitted to the wheel brake 20. Here, the wheel brake 20 is a drum brake or a disk brake.

상기 유압제어장치(HCU)는 인렛솔레노이드밸브(41), 아웃렛솔레노이드밸브(42), 모터(43), 유압펌프(44)를 포함한다.The hydraulic control unit HCU includes an inlet solenoid valve 41, an outlet solenoid valve 42, a motor 43, and a hydraulic pump 44.

인렛솔레노이드밸브(41)가 상기 브레이크라인(30)에 설치되어 있고, 평상시에는 개방되어 있으며, 전자제어장치(ECU, 도시안됨)의 신호에 따라 작동되어, 브레이크라인(30)의 개폐를 제어한다.An inlet solenoid valve 41 is installed in the brake line 30, is normally open, and operates according to a signal of an electronic control unit (ECU, not shown) to control the opening and closing of the brake line 30. .

상기 환류라인(31)은 휠브레이크(20) 쪽 브레이크라인(30)에서 분기되어 다시 마스터실린더(10) 쪽 브레이크라인(30)에서 합류된다.The reflux line 31 branches from the brake line 30 on the wheel brake 20 side and joins again on the brake line 30 on the master cylinder 10 side.

아웃렛솔레노이드밸브(42)가 상기 환류라인(31)에 설치되어 있으며, 평상시 폐쇄되어 있고, 전자제어장치(ECU)의 신호에 따라 개방된다.The outlet solenoid valve 42 is provided in the reflux line 31, is normally closed, and opens in accordance with the signal of the electronic control unit ECU.

유압펌프(44)가 상기 아웃렛솔레노이드밸브(42)의 하류측에 설치되어, 환류되는 작동유의 유압을 일정분 상승시킨다. 유압펌프(44)는 예를 들어 피스톤펌프이고, 상기 유압펌프(44)의 토출량은 모터(43)의 회전속도에 의해 소정의 관계로 결정된다. 상기 전자제어장치(ECU)에 의하여 상기 아웃렛솔레노이드밸브의 개폐시간에 따라 상기 유압펌프(44)에 연결된 모터(43)의 회전속도가 제어되어, 상기 유압펌프(44)의 맥동이 적어지게 된다. 구체적인 제어방법을 예를 들면, 상기 아웃렛솔레노이드밸브(42)의 개폐시간에 따른 브레이크라인(30)의 작동유 감소량이 상기 전자제어장치(ECU)에서 계산되고, 이에 따라 상기 모터(43)의 회전속도가 제어되고, 브레이크라인(30)의 작동유 감소량에 상응하는 유압펌프(44) 토출량이 토출되어, 종래의 설치되는 댐퍼 및 오리피스가 불필요하게 된다.A hydraulic pump 44 is provided on the downstream side of the outlet solenoid valve 42 to raise the hydraulic pressure of the working oil to be returned for a certain amount. The hydraulic pump 44 is, for example, a piston pump, and the discharge amount of the hydraulic pump 44 is determined in a predetermined relationship by the rotational speed of the motor 43. The rotational speed of the motor 43 connected to the hydraulic pump 44 is controlled by the electronic control unit ECU according to the opening and closing time of the outlet solenoid valve, so that the pulsation of the hydraulic pump 44 is reduced. As a specific control method, for example, the amount of operating oil reduction of the brake line 30 depending on the opening and closing time of the outlet solenoid valve 42 is calculated by the electronic control unit ECU, and thus the rotational speed of the motor 43 is reduced. Is controlled, and the discharge amount of the hydraulic pump 44 corresponding to the reduction amount of the hydraulic oil of the brake line 30 is discharged, so that the conventionally installed damper and orifice are unnecessary.

상기 셕션라인(32)은 상기 아웃렛솔레노이드밸브(42)와 유압펌프(44) 사이에서 분기되며 마스터실린더(10)의 저장탱크(11)와 연결되어, 환류되는 작동유가 일시 저장되도록 통로를 형성한다.The section line 32 is branched between the outlet solenoid valve 42 and the hydraulic pump 44 and connected to the storage tank 11 of the master cylinder 10 to form a passage so that the reflux working oil is temporarily stored. .

상기 셕션라인(32) 분기점의 상류측에 체크밸브(60)가 설치된다. 상기 체크밸브(60)는 볼(61)과 스프링(62)형식으로 되어, 환류되는 작동유가 항상 저장탱크(22) 측으로 흐르도록 한다. 또한 체크밸브(60)는 1~5 bar(게이지압)에서 개방되며, 1bar이상으로 설정한 것은 작동유의 급팽창에 의한 맥동 및 유체의 소음을 저감시키며 휠브레이크(20)의 급격한 제동압의 감소를 방지하고 연속적으로 감소되게 하며, 5bar 이하로 설정한 것은 휠브레이크(20)의 제동압이 신속히, 적절히 감압되게 하기 위해서이다.A check valve 60 is provided upstream of the junction line 32 branch point. The check valve 60 is in the form of a ball 61 and a spring 62, so that the reflux working oil always flows to the storage tank 22 side. In addition, the check valve 60 is opened at 1 to 5 bar (gauge pressure), and the setting of 1 bar or more reduces the pulsation and the noise of the fluid due to the sudden expansion of the working oil and the sudden braking pressure of the wheel brake 20 is reduced. The pressure is set to 5 bar or less so that the braking pressure of the wheel brake 20 can be quickly and appropriately reduced.

상기 전자제어장치(ECU)는 마스터실린더(20)의 스트로크센서(도시안됨)과 휠의 속도센서(도시안됨)에 의한 신호를 입력받아, 소정의 연산후에 ABS 작동여부를 판단하여 유압제어장치(HCU)의 인렛솔레노이느밸브(41), 아웃렛솔레노이드밸브(42), 유압펌프(44)를 구동하는 모터(43)에 작동신호를 출력한다.The electronic control unit (ECU) receives signals from the stroke sensor (not shown) of the master cylinder 20 and the speed sensor (not shown) of the wheel, and determines whether the ABS is operated after a predetermined operation. The operation signal is output to the inlet solenoid valve 41, the outlet solenoid valve 42, and the motor 43 for driving the hydraulic pump 44 of the HCU.

이하, 본 발명에 의한 차량 안티록 브레이크 시스템의 제어회로의 작용에 대하여 설명한다.The operation of the control circuit of the vehicle antilock brake system according to the present invention will be described below.

평상시에는 운전자가 페달(13)을 밟는 경우에는 제동압이 곧바로 휠브레이크(20)에 전달된다. 그런데, 휠록(Wheel Lock)이 발생되어 ABS 작동이 시작되는 경우에는 슬립율이 대략 15~20%가 되도록 제동압을 감압, 유지, 증압한다.When the driver normally presses the pedal 13, the braking pressure is immediately transmitted to the wheel brake 20. However, when the wheel lock is generated and the ABS operation starts, the braking pressure is reduced, maintained, and increased so that the slip ratio is approximately 15 to 20%.

감압인 경우에는 인렛솔레노이드밸브(41)를 폐쇄하고, 아웃렛솔레노이드밸브(42)를 개방하여, 휠브레이크(20)의 작동유를 저장탱크(11) 및 유압펌프(44)로 환류한다.When the pressure is reduced, the inlet solenoid valve 41 is closed, the outlet solenoid valve 42 is opened, and the hydraulic oil of the wheel brake 20 is returned to the storage tank 11 and the hydraulic pump 44.

유지인 경우에는 인렛솔레노이드밸브(41)와 아웃렛솔레노이드밸브(42)를 각각 폐쇄하여, 휠브레이크(20)의 제동압이 유지되게 한다.In the case of holding, the inlet solenoid valve 41 and the outlet solenoid valve 42 are closed to maintain the braking pressure of the wheel brake 20, respectively.

증압인 경우에는 인렛솔레노이드밸브(41)를 개방하여 유압펌프(44)에 의해 유압이 상승된 작동유가 휠브레이크(20)에 공급되어, 휠브레이크(20)의 제동압이 증가된다.In the case of the pressure increase, the inlet solenoid valve 41 is opened and the hydraulic oil whose hydraulic pressure is increased by the hydraulic pump 44 is supplied to the wheel brake 20, so that the braking pressure of the wheel brake 20 is increased.

상기와 같이 구성되는 본 발명은 환류라인에 저압어큐뮬레이터가 필요없어, 소형 경량화된 ABS 묘듈레이터 블럭이 제공될 수 있으며, 또한 부품수가 줄어들어 가공 및 조립비용이 감소되는 작용효과가 있다. 또한, 본 발명은 브레이크의 제동압의 급격한 압력변동으로 인한 소음이 저감되는 작용효과가 있다. 또한, 본 발명은 ABS 작동시 감압하는 경우에 갑작스런운 감압에 의한 수격현상이 방지되고 연속적으로 감압되는 작용효과가 있다.The present invention configured as described above does not require a low pressure accumulator in the reflux line, it can be provided a small and lightweight ABS mydulator block, and also has the effect of reducing the number of parts reduced machining and assembly costs. In addition, the present invention has the effect of reducing the noise caused by the sudden pressure change of the braking pressure of the brake. In addition, the present invention has the effect of preventing the water hammer due to sudden depressurization in the case of reducing the pressure during ABS operation and continuously decompressing.

Claims (3)

마스터실린더에서 발생되는 제동압이 휠브레이크로 공급되는 통로를 형성하는 브레이크라인과, 상기 브레이크라인을 제어하는 유압제어장치(HCU)와, 상기 유압제어장치를 제어하는 전자제어장치(ECU)를 포함하는 차량 안티록 브레이크 시스템(ABS) 제어회로에 있어서,It includes a brake line for forming a passage for supplying the brake pressure generated from the master cylinder to the wheel brake, a hydraulic control unit (HCU) for controlling the brake line, and an electronic control unit (ECU) for controlling the hydraulic control device In the vehicle anti-lock brake system (ABS) control circuit, 상기 유압제어장치에는 휠브레이크의 상류측에 위치하는 브레이크라인에 설치되며 평상시 개방되어 있는 인렛솔레노이드밸브와, 상기 휠브레이크에 하류측에 위치하는 환류라인에 설치되며 평상시 닫혀있는 아웃렛솔레노이드밸브가 포함되며;The hydraulic control device includes an inlet solenoid valve that is installed on a brake line located upstream of the wheel brake and is normally open, and an outlet solenoid valve that is installed on a reflux line located downstream of the wheel brake and normally closed. ; 상기 전자제어장치는 휠의 속도센서에 의한 휠속도신호를 입력받아 연산한 후에 상기 인렛솔레노이드밸브, 아웃렛솔레노이드밸브에 개폐신호 및 상기 환류라인에 설치된 유압펌프에 작동신호를 출력하며;The electronic controller outputs an operation signal to the inlet solenoid valve and the outlet solenoid valve, the opening / closing signal and the hydraulic pump installed in the reflux line after calculating and receiving the wheel speed signal by the speed sensor of the wheel; 상기 유압펌프의 입구측에 위치하는 환류라인에서 분기되어 상기 마스터실린더에 장착된 저장탱크와 연결되는 셕션라인이 설치되며;A section line branched from a reflux line positioned at an inlet side of the hydraulic pump and connected to a storage tank mounted to the master cylinder is installed; 상기 환류라인에서 상기 셕션라인이 분기되는 지점의 상류측에 체크밸브가 설치된 것을 특징으로 하는 차량 안티록 브레이크 시스템 제어회로.And a check valve is provided upstream of a point at which the section line diverges from the reflux line. 제1항에 있어서, 상기 체크밸브는 볼과 스프링을 포함하며, 스프링은 1~5 bar에서 상기 환류라인을 한방향으로 개폐되게 하는 것을 특징으로 하는 차량 안티록 브레이크 시스템 제어회로.The control circuit of claim 1, wherein the check valve includes a ball and a spring, and the spring opens and closes the reflux line in one direction at 1 to 5 bar. 제1항 또는 제2항에 있어서, 상기 유압펌프의 맥동이 적어지도록, 상기 전자제어장치가 상기 아웃렛솔레노이드밸브의 개폐시간에 따라 상기 유압펌프에 연결된 모터의 회전속도를 제어하는 것을 특징으로 하는 차량 안티록 브레이크 시스템 제어회로.The vehicle according to claim 1 or 2, wherein the electronic controller controls the rotational speed of the motor connected to the hydraulic pump according to the opening and closing time of the outlet solenoid valve so that the pulsation of the hydraulic pump is reduced. Antilock brake system control circuit.
KR10-2002-0034057A 2002-06-18 2002-06-18 Vehicle's ABS control circuit KR100491919B1 (en)

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KR200450567Y1 (en) * 2010-05-11 2010-10-12 김애연 Chiropractor with ventilation structure

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JP2000225927A (en) * 1999-02-03 2000-08-15 Bosch Braking Systems Co Ltd Hydraulic system and braking system using it

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