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KR20120031391A - Fale-safe improving electric booster type brake system - Google Patents

Fale-safe improving electric booster type brake system Download PDF

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Publication number
KR20120031391A
KR20120031391A KR1020100092906A KR20100092906A KR20120031391A KR 20120031391 A KR20120031391 A KR 20120031391A KR 1020100092906 A KR1020100092906 A KR 1020100092906A KR 20100092906 A KR20100092906 A KR 20100092906A KR 20120031391 A KR20120031391 A KR 20120031391A
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South Korea
Prior art keywords
master cylinder
electric booster
braking
type
pedal
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KR1020100092906A
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Korean (ko)
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김필구
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현대모비스 주식회사
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Priority to KR1020100092906A priority Critical patent/KR20120031391A/en
Publication of KR20120031391A publication Critical patent/KR20120031391A/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
    • B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems
    • 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
    • B60T8/4072—Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking
    • B60T8/4081—Systems with stroke simulating devices for driver input
    • 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
    • B60T8/88—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 with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
    • B60T8/92—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 with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means automatically taking corrective action
    • B60T8/94—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 with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means automatically taking corrective action on a fluid pressure regulator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L7/00—Electrodynamic brake systems for vehicles in general
    • B60L7/10—Dynamic electric regenerative braking

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Regulating Braking Force (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

본 발명의 전동부스터 방식 제동장치는 전동부스터(4)로 제동액압을 형성하는 메인 마스터실린더(5)와, 페달(2)의 작동으로만 액압을 형성해 페달 반력을 제공하는 페달시뮬레이터(30)로 공급하는 서브 마스터실린더(20)로 구성되고, 상기 서브 마스터실린더(20)와 메인 마스터실린더(5)쪽이 1개의 제어밸브(24)를 갖는 분기라인(22)으로 직접 연결됨으로써, 상기 전도부스터(4)의 고장에 따른 페일-세이프(Fail-Safe)를 위한 구성을 단순화하고 솔레노이드밸브의 수량감소를 통해 원가도 절감할 수 있는 특징을 갖는다.The electric booster type braking device of the present invention includes a main master cylinder (5) for forming a brake hydraulic pressure with the electric booster (4), and a pedal simulator (30) for providing pedal reaction force by forming hydraulic pressure only by the operation of the pedal (2). The sub master cylinder 20 to be supplied, and the sub master cylinder 20 and the main master cylinder 5 side are directly connected to the branch line 22 having one control valve 24, the conduction booster Simplify the configuration for fail-safe due to the failure of (4) and reduce the cost by reducing the quantity of solenoid valves.

Description

페일세이프강화 타입 전동부스터 방식 제동장치{Fale-Safe Improving Electric Booster type Brake System} Fail-Safe Improving Electric Booster Type Brake System

본 발명은 전동부스터 방식 제동장치에 관한 것으로, 특히 페일세이프(Fale-Safe)의 기능을 강화한 전동부스터 방식 제동장치에 관한 것이다.The present invention relates to an electric booster type braking device, and more particularly, to an electric booster type braking device with enhanced fail-safe function.

일반적으로 전동식 부스터 방식 제동시스템의 구성은 전후륜 제동압을 형성을 위한 모터타입 전동부스터와, 한쌍의 마스터실린더와, 운전자의 반력 형성을 위한 페달시뮬레이터와, 유로 개폐를 위한 4개의 솔레노이드밸브와, 그리고 페달 스트로크 센서, 전동부스터의 제어를 위한 ECU로 이루어진다. In general, the electric booster type braking system includes a motor-type electric booster for forming front and rear wheel braking pressure, a pair of master cylinders, a pedal simulator for forming a reaction force of the driver, four solenoid valves for opening and closing a flow path, It consists of a pedal stroke sensor and an ECU for controlling the electric booster.

상기 전동부스터 방식 제동장치는 운전자가 페달을 밟으면 4개의 솔레노이드밸브중 3개가 닫혀있고 1개가 열려있어 페달에 연결된 마스터실린더의 압력이 페달 시뮬레이터로 전달되고, 상기 페달 시뮬레이터의 피스톤과 스프링의 반력을 통해 운전자가 페달에서 답력을 느낄 수 있게 된다.When the driver presses the pedal, the electric booster type braking device is closed with three of the four solenoid valves and one is open so that the pressure of the master cylinder connected to the pedal is transmitted to the pedal simulator, and through the reaction force of the piston and the spring of the pedal simulator. The driver can feel the power on the pedals.

반면, 전후륜 브레이크의 요구제동력(제동압)은 페달 스트로크 센서의 신호를 받는 ECU가 전동부스터를 구동하면, 상기 전동부스터를 통해 마스터실린더가 압력을 형성해 전후륜의 제동압으로 공급함으로써 제동력을 발생하게 된다. On the other hand, the required braking force (braking pressure) of the front and rear brakes is generated when the ECU receiving the pedal stroke sensor signal drives the electric booster, thereby generating a braking force by supplying the master cylinder to the front and rear wheel braking pressure through the electric booster. Done.

통상, 상기 전동부스터 방식 제동장치에서 전기적인 에러로 인한 페일이 발생되더라도 페달의 조작만으로 페일-세이프가 구현될 수 있는데, 이는 페달에 연결된 마스터실린더쪽의 압력이 솔레노이드밸브를 거쳐 연결되어진 유압라인으로 공급되고, 유압라인이 전후륜으로 연결되어 있으므로 전후륜에선 제동력이 발생됨에 기인된다.In general, even if a fail occurs due to an electric error in the electric booster type braking device, a fail-safe operation may be implemented by only operating a pedal, which is a pressure line connected to a master cylinder connected to a pedal through a solenoid valve. It is supplied, and the hydraulic line is connected to the front and rear wheels because the braking force is generated in the front and rear wheels.

하지만, 상기 전동부스터 방식 제동장치의 유압라인은 전동부스터에 연계된 마스터실린더에 연결된 유압라인과, 페달에 연계된 마스터실린더에 연결된 연결유압라인으로 서로 연결됨으로써, 상기 연결유압라인쪽에 설치된 솔레노이드밸브만 닫혀있는 유압라인 페일 상황시 전동부스터에 연계된 마스터실린더를 이용한 전후륜의 제동압력 형성이 불가능할 수 도 있게 된다.
However, the hydraulic line of the electric booster type braking device is connected to each other by a hydraulic line connected to the master cylinder linked to the electric booster, and a connecting hydraulic line connected to the master cylinder linked to the pedal, so that only the solenoid valve installed on the connecting hydraulic line side In a closed hydraulic line fail situation, braking pressure in the front and rear wheels using the master cylinder linked to the electric booster may be impossible.

이에 상기와 같은 점을 감안하여 발명된 본 발명은 전동부스터로 작동되는 마스터실린더쪽으로 페달로 작동되는 마스터실린더의 유압라인을 직접 연결함으로써, 유압라인에 설치된 솔레노이드밸브의 수량을 줄이면서도 유압라인 페일시에도 페일-세이프 기능을 강화할 수 있도록 된 전동부스터 방식 제동장치를 제공하는데 목적이 있다.
Accordingly, the present invention in view of the above point by directly connecting the hydraulic line of the pedal operated master cylinder to the master cylinder operated by the electric booster, while reducing the number of solenoid valves installed in the hydraulic line while failing the hydraulic line It is an object of the present invention to provide an electric booster-type braking device that can enhance the fail-safe function.

상기와 같은 목적을 달성하기 위한 본 발명은 페달에 의해 유압을 형성해 페달반력으로 제공하는 페달시뮬레이터로 공급하는 서브 마스터실린더와, 상기 페달의 스트로크를 감지한 ECU로 제어되는 전동부스터를 통해 작동되어 제동유압을 형성하는 메인 마스터실린더로 구성되어진 전동부스터방식 제동장치에 있어서,The present invention for achieving the above object is to operate by braking is operated through a sub-master cylinder to form a hydraulic pressure by the pedal to supply to the pedal simulator to provide a pedal reaction force, and an electric booster controlled by the ECU that detects the stroke of the pedal In the electric booster type braking device composed of a main master cylinder for forming hydraulic pressure,

상기 전동부스터 페일시 상기 서브 마스터실린더의 유압을 상기 메인 마스터실린더에서 제동유압으로 사용하도록 상기 서브 마스터실린더와 상기 메인 마스터실린더사이를 분기라인으로 직접 연결시켜준 것을 특징으로 한다.When the electric booster fails, the sub master cylinder and the main master cylinder are directly connected by a branch line to use the hydraulic pressure of the sub master cylinder as the braking hydraulic pressure in the main master cylinder.

상기 분기라인은 한쪽을 상기 서브 마스터실린더와 상기 페달시뮬레이터를 이어주는 답력라인에서 분기시키고 다른쪽을 상기 메인 마스터실린더에 직접연결시켜준다.The branching line branches one end at a step line connecting the sub master cylinder and the pedal simulator and connects the other side directly to the main master cylinder.

상기 분기라인에는 노말오픈(Normal Open)타입의 제어밸브가 1개 구비되고, 상기 답력라인에는 노말클로즈(Normal Close)타입의 또 다른 제어밸브가 1개 구비되어진다. The branch line is provided with one normal open type control valve, and the stepping line is provided with another control valve of the normal close type.

상기 분기라인의 제어밸브가 열리면 상기 답력라인의 제어밸브는 닫혀 상기 페달시뮬레이터의 유압흐름을 차단시키케 된다.When the control valve of the branch line is opened, the control valve of the stepping line is closed to block the hydraulic flow of the pedal simulator.

상기 메인 마스터실린더에는 상기 분기라인의 연결부를 기준으로 서로 대향되는 실린더의 내부공간을 이루는 제1?2챔버가 형성되고, 상기 내부공간으로 상기 전동부스터를 통해 구동되는 메인피스톤이 수용되어진다.The main master cylinder has first and second chambers forming inner spaces of cylinders opposed to each other on the basis of the connecting portion of the branch line, and the main piston driven through the electric booster is accommodated in the inner space.

상기 제1?2챔버에는 유압라인이 각각 연결되어 휠실린더로 제동유압을 분배하는 ESC로 이어진다.
Hydraulic lines are respectively connected to the first and second chambers, leading to ESCs for distributing braking hydraulic pressure to wheel cylinders.

이러한 본 발명은 전동부스터에 연계된 마스터실린더쪽으로 페달에 연계된 마스터실린더의 유압라인을 직접 연결하여 유압라인 페일시에도 제동압력을 형성할 수 있어 페일-세이프 기능을 강화할 수 있고, 한쌍의 마스터실린더간 유압라인의 단순화로 솔레노이드밸브의 수량도 줄여 부품수 감소와 원가절감을 달성하는 효과가 있게 된다.
The present invention can directly connect the hydraulic line of the master cylinder linked to the pedal to the master cylinder linked to the electric booster to form a braking pressure even when the hydraulic line fails to enhance the fail-safe function, a pair of master cylinder By simplifying the hydraulic line between the two, the number of solenoid valves is reduced, thereby reducing the number of parts and reducing the cost.

도 1은 본 발명에 따른 페일세이프강화 타입 전동부스터 방식 제동장치의 구성도이고, 도 2는 본 발명에 따른 전동부스터 방식 제동장치의 노말제동과 회생제동시 작동도이며, 도 3은 본 발명에 따른 전동부스터 방식 제동장치의 페일세이프 작동상태도이다.1 is a configuration diagram of a fail-safe reinforced type electric booster braking device according to the present invention, Figure 2 is an operation diagram during normal braking and regenerative braking of the electric booster braking device according to the present invention, Figure 3 is The fail-safe operation state of the electric booster-type braking device according to.

이하 본 발명의 실시예를 첨부된 예시도면을 참조로 상세히 설명하며, 이러한 실시예는 일례로서 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 여러 가지 상이한 형태로 구현될 수 있으므로, 여기에서 설명하는 실시예에 한정되지 않는다.DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Since the exemplary embodiments of the present invention may be embodied in various different forms, one of ordinary skill in the art to which the present invention pertains may be described herein. It is not limited to the Example to make.

도 1은 본 발명에 따른 페일세이프강화 타입 전동부스터 방식 제동장치의 구성도를 나타낸다. 1 is a block diagram of a fail-safe enhanced type electric booster brake system according to the present invention.

도시된 바와 같이, 상기 전동부스터 방식 제동장치는 페달(2)의 움직임을 페달센서(3)를 이용해 검출하는 ECU(1)와, 상기 ECU(1)로 제어되는 전동부스터(4)의 구동으로 제동액압을 생성해 전륜과 후륜의 제동력으로 제공하는 메인제동수단과, 상기 페달(2)의 조작시 페달(2)쪽으로 가상적인 페달답력을 전달하고 상기 전동부스터(4)의 배력한계점 이후구간에서 페달(2)의 스트로크만으로 제동액압을 형성해 전륜과 후륜의 제동력으로 제공하는 서브제동수단과, 상기 제동수단들에서 발생된 제동액압을 제공받아 전륜과 후륜쪽으로 분배하는 ESC(40, Electronic Stability Control)와, 상기 ESC(40)에서 분배된 제동액압으로 전륜과 후륜을 제동하는 휠실린더(50)로 구성된다.As shown, the electric booster brake system is driven by the ECU 1 which detects the movement of the pedal 2 using the pedal sensor 3 and the electric booster 4 controlled by the ECU 1. The main braking means for generating braking hydraulic pressure and providing the braking force of the front wheel and the rear wheel, and transmitting the virtual pedal response to the pedal 2 when the pedal 2 is operated, and in the section after the boosting limit of the electric booster 4. A sub braking means for forming braking hydraulic pressure only by the stroke of the pedal 2 and providing the braking force of the front and rear wheels, and an ESC (40, Electronic Stability Control) which receives and distributes the braking hydraulic pressure generated from the braking means toward the front and rear wheels. And a wheel cylinder 50 for braking the front and rear wheels with the braking hydraulic pressure distributed by the ESC 40.

상기와 같이 구성된 전동부스터 방식 제동장치는 널리 적용되는 구성으로서, 본 실시예에선 상기 메인제동수단의 전동부스터(4)를 통해 제동액압을 형성하는 메인 마스터실린더(5)의 구성을 달리하게 된다.The electric booster-type braking device configured as described above is widely applied, and in this embodiment, the main master cylinder 5 forming the braking hydraulic pressure through the electric booster 4 of the main braking means is different.

즉, 상기 메인 마스터실린더(5)는 전동부스터(4)를 통해 구동되는 메인피스톤(6)과, 상기 피스톤(6)을 수용하고 오일리저버(9)에 연결되어진 제1?2챔버(7a,7b)를 서로 대향되게 형성한 실린더(7)와, 상기 제1?2챔버(7a,7b)내에서 리턴스프링으로 탄발지지되고 상기 피스톤(6)의 작동시 오일에 압력을 형성하는 서브피스톤(8)으로 구성되어진다.That is, the main master cylinder 5 includes a main piston 6 driven through the electric booster 4, first and second chambers 7a, which receive the piston 6 and are connected to the oil reservoir 9. A cylinder 7 having the 7b) opposed to each other, and a sub-piston which is elastically supported by a return spring in the first and second chambers 7a and 7b and creates pressure on oil when the piston 6 is operated. 8).

상기 제1?2챔버(7a,7b)에는 제동액압을 ESC(40)로 공급하도록 이어진 유압라인(10,11)이 각각 연결되어진다.Hydraulic lines 10 and 11 which are connected to the first and second chambers 7a and 7b to supply the braking hydraulic pressure to the ESC 40 are respectively connected.

상기와 같이 메인 마스터실린더(5)의 구조가 변화됨으로써, 상기 서브제동수단의 서브 마스터실린더(20)와 페달시뮬레이터(30)를 잇고 제1제어밸브(23)를 갖춘 답력라인(21)에서 분기되어 페일-세이프(Fail-Safe)를 구현하는 분기라인(22)의 연결위치도 달라지게 된다.As the structure of the main master cylinder 5 is changed as described above, the sub master cylinder 20 and the pedal simulator 30 of the sub braking means are branched from the step line 21 having the first control valve 23. Thus, the connection position of the branch line 22 for implementing fail-safe is also changed.

상기 제1제어밸브(23)는 노말클로즈(Normal Close)인 NC타입이 적용된다The first control valve 23 is applied to the NC type of Normal Close (Normal Close)

본 실시예에선 상기 분기라인(22)은 상기 메인 마스터실린더(5)쪽으로 직접 연결되며, 구체적으로는 상기 제1?2챔버(7a,7b)쪽으로 오일이 공급되는 위치로 연결되어진다.In the present embodiment, the branch line 22 is directly connected to the main master cylinder 5, specifically, to a position where oil is supplied to the first and second chambers 7a and 7b.

상기 분기라인(22)에는 제2제어밸브(24)가 설치되며, 상기 제2제어밸브(24)는 노말오픈(Normal Open)인 NO타입이 적용된다A second control valve 24 is installed in the branch line 22, and the second control valve 24 is NO type which is normally open.

도 2는 본 실시예에 따른 전동부스터 방식 제동장치의 노말제동과 회생제동시 작동을 나타낸다.Figure 2 shows the normal braking and regenerative braking operation of the electric booster brake system according to the present embodiment.

도시된 바와 같이, 노말제동과 회생제동시는 정상적인 작동이 구현되므로 제1제어밸브(23)는 열려있고, 제2제어밸브(24)는 닫혀진 상태가 된다.As shown, since normal operation is implemented during normal braking and regenerative braking, the first control valve 23 is open and the second control valve 24 is in a closed state.

상기와 같이 제1제어밸브(23)가 열린 상태이므로 페달(2)을 통해 서브 마스터실린더(20)에서 발생되어진 액압은 답력라인(21)을 따라 페달시뮬레이터(30)로 공급되고, 상기 페달시뮬레이터(30)는 반력을 발생시켜 상기 페달(2)쪽으로 제공하게 된다.Since the first control valve 23 is open as described above, the hydraulic pressure generated in the sub master cylinder 20 through the pedal 2 is supplied to the pedal simulator 30 along the step line 21, and the pedal simulator 30 generates a reaction force is provided to the pedal (2).

또한, ECU(1)에 의해 구동되어진 전동부스터(4)를 통해 메인 마스터실린더(5)에서 발생된 제동액압은 제1?2챔버(7a,7b)에 각각 연결된 유압라인(10,11)으로 배출되고, 상기 유압라인(10,11)을 통해 배출된 제동액압은 ESC(40)를 거쳐 전륜과 후륜쪽으로 분기된 유압라인을 통해 휠실린더(50)로 공급됨으로써 차륜을 제동하게 된다.In addition, the brake hydraulic pressure generated in the main master cylinder 5 through the electric booster 4 driven by the ECU 1 is transferred to the hydraulic lines 10 and 11 connected to the first and second chambers 7a and 7b, respectively. The brake fluid pressure discharged through the hydraulic lines 10 and 11 is supplied to the wheel cylinder 50 through the hydraulic lines branched toward the front wheels and the rear wheels via the ESC 40 to brake the wheels.

도 3은 본 실시예에 따른 전동부스터 방식 제동장치의 페일세이프 작동상태도를 나타낸다.3 is a failsafe operation state diagram of the electric booster-type braking apparatus according to the present embodiment.

도시된 바와 같이, 메인 마스터실린더(5)에선 전동부스터(4)를 통해 제동액압이 발생되지 못하고 대신 페달(2)을 통해 작동되는 서브 마스터실린더(20)에서만 액압이 발생되어진다.As shown, braking hydraulic pressure is not generated through the electric booster 4 in the main master cylinder 5, but hydraulic pressure is generated only in the sub master cylinder 20 operated through the pedal 2.

이러한 경우 페일-세이프가 구현되므로 제1제어밸브(23)는 닫히고, 제2제어밸브(24)는 열려진 상태가 된다.In this case, since fail-safe is implemented, the first control valve 23 is closed and the second control valve 24 is in an open state.

이에 따라 서브 마스터실린더(20)에서 발생되어 답력라인(21)으로 배출된 액압은 제1제어밸브(23)에 의해 차단되어 분기라인(22)쪽으로 흘러가고, 상기 분기라인(22)쪽으로 흐른 액압은 열려진 제2제어밸브(24)를 거쳐 메인 마스터실린더(5)쪽으로 공급되어진다.Accordingly, the hydraulic pressure generated in the sub master cylinder 20 and discharged into the step line 21 is blocked by the first control valve 23 and flows toward the branch line 22, and the hydraulic pressure flowing toward the branch line 22. Is supplied to the main master cylinder (5) via the open second control valve (24).

상기와 같이 서브 마스터실린더(20)에서 메인 마스터실린더(5)로 제공된 액압은 제1?2챔버(7a,7b)쪽으로 유입되고, 상기 제1?2챔버(7a,7b)쪽으로 유입되어진 액압은 제1?2챔버(7a,7b)에 각각 연결된 유압라인(10,11)을 통해 제동액압으로 배출되어진다.As described above, the hydraulic pressure provided from the sub master cylinder 20 to the main master cylinder 5 flows into the first and second chambers 7a and 7b, and the hydraulic pressure flowed into the first and second chambers 7a and 7b. It is discharged to the braking liquid pressure through the hydraulic lines (10, 11) connected to the first and second chambers (7a, 7b), respectively.

상기 유압라인(10,11)을 통해 배출된 제동액압이 ESC(40)로 공급되면, 상기 ESC(40)는 전륜과 후륜쪽으로 분기된 유압라인을 통해 휠실린더(50)로 제동액압을 공급함으로써 차륜이 제동되는 페일-세이프를 구현하게 된다.When the braking hydraulic pressure discharged through the hydraulic lines 10 and 11 is supplied to the ESC 40, the ESC 40 supplies the braking hydraulic pressure to the wheel cylinder 50 through the hydraulic lines branched toward the front wheel and the rear wheel. The wheels will be braked fail-safe.

상기와 같이 본실시예에선 전동부스터(4)로 제동액압을 형성하는 메인 마스터실린더(5)가 페달(2)의 작동으로만 액압을 형성하는 서브 마스터실린더(20)쪽과 분기라인(22)으로 직접 연결됨으로써, 상기 전동부스터(4)의 고장에 따른 페일-세이프를 위한 구성을 단순화하고 솔레노이드밸브의 수량감소를 통해 원가도 절감할 수 있으며, 특히 페일-세이프 기능이 강화될 수 있게 된다.
As described above, in the present embodiment, the main master cylinder 5 forming the braking hydraulic pressure with the electric booster 4 has the sub master cylinder 20 and the branch line 22 forming the hydraulic pressure only by the operation of the pedal 2. By being directly connected to, the configuration for fail-safe according to the failure of the electric booster 4 can be simplified and the cost can be reduced by reducing the number of solenoid valves, and in particular, the fail-safe function can be enhanced.

1 : ECU 2 : 페달
3 : 센서 4 : 전동부스터
5,20 : 메인 ?서브 마스터실린더
6 : 메인피스톤 7 : 실린더
7a,7b : 제1?2챔버 8 : 서브피스톤
9 : 오일리저버 10,11 : 유압라인
21 : 답력라인 22 : 분기라인
23,24 : 제1?2제어밸브
30 : 페달시뮬레이터
40 : ESC 50 : 휠실린더1: ECU 2: Pedal
3: sensor 4: electric booster
5,20: Main sub master cylinder
6: main piston 7: cylinder
7a, 7b: 1st-2 chamber 8: sub piston
9: Oil reservoir 10,11: Hydraulic line
21: answer line 22: branch line
23,24: 1st and 2nd control valve
30: pedal simulator
40: ESC 50: Wheel cylinder

Claims (6)

페달에 의해 유압을 형성해 페달반력으로 제공하는 페달시뮬레이터로 공급하는 서브 마스터실린더와, 상기 페달의 스트로크를 감지한 ECU로 제어되는 전동부스터를 통해 작동되어 제동유압을 형성하는 메인 마스터실린더로 구성되어진 전동부스터방식 제동장치에 있어서,
상기 전동부스터 페일시 상기 서브 마스터실린더의 유압을 상기 메인 마스터실린더에서 제동유압으로 사용하도록 상기 서브 마스터실린더와 상기 메인 마스터실린더사이를 분기라인으로 직접 연결시켜준 것을 특징으로 하는 페일세이프강화 타입 전동부스터방식 제동장치.
An electric motor consisting of a main master cylinder that generates braking hydraulic pressure by operating a sub master cylinder that generates hydraulic pressure by a pedal and supplies the pedal simulator to provide pedal reaction force, and an electric booster controlled by the ECU that senses the stroke of the pedal. In booster type braking system,
Fail-safe reinforced type electric booster characterized in that the direct connection between the sub master cylinder and the main master cylinder in a branch line to use the hydraulic pressure of the sub master cylinder in the main master cylinder when braking when the electric booster fails. Anti-braking system.
청구항 1에 있어서, 상기 분기라인은 한쪽을 상기 서브 마스터실린더와 상기 페달시뮬레이터를 이어주는 답력라인에서 분기시키고 다른쪽을 상기 메인 마스터실린더에 직접연결시킨 것을 특징으로 하는 페일세이프강화 타입 전동부스터방식 제동장치.
The fail-safe strengthening type electric booster type braking apparatus according to claim 1, wherein the branching line is branched from a step line connecting the sub master cylinder and the pedal simulator, and the other side is directly connected to the main master cylinder. .
청구항 2에 있어서, 상기 분기라인에는 노말오픈(Normal Open)타입의 제어밸브가 1개 구비되고, 상기 답력라인에는 노말클로즈(Normal Close)타입의 또 다른 제어밸브가 1개 구비되어진 것을 특징으로 하는 페일세이프강화 타입 전동부스터방식 제동장치.
The method according to claim 2, wherein the branch line is provided with one normal open type control valve, the step line is provided with another control valve of the normal close type (Normal Close) type Fail-safe reinforcement type electric booster braking system.
청구항 3에 있어서, 상기 분기라인의 제어밸브가 열리면 상기 답력라인의 제어밸브는 닫혀 상기 페달시뮬레이터의 유압흐름을 차단시키는 것을 특징으로 하는 페일세이프강화 타입 전동부스터방식 제동장치.
The fail-safe strengthening type electric booster type braking apparatus according to claim 3, wherein when the control valve of the branch line is opened, the control valve of the stepping line is closed to block the hydraulic flow of the pedal simulator.
청구항 2에 있어서, 상기 메인 마스터실린더에는 상기 분기라인의 연결부를 기준으로 서로 대향되는 실린더의 내부공간을 이루는 제1?2챔버가 형성되고, 상기 내부공간으로 상기 전동부스터를 통해 구동되는 메인피스톤이 수용되어진 것을 특징으로 하는 페일세이프강화 타입 전동부스터방식 제동장치.
The main master cylinder of claim 2, wherein the first and second chambers forming the inner spaces of the cylinders facing each other based on the connection portion of the branch line are formed, and the main piston driven through the electric booster is formed into the inner space. A fail-safe enhanced type electric booster braking device, characterized in that it is accommodated.
청구항 5에 있어서, 상기 제1?2챔버에는 유압라인이 각각 연결되어 휠실린더로 제동유압을 분배하는 ESC로 이어지는 것을 특징으로 하는 페일세이프강화 타입 전동부스터방식 제동장치.The fail-safe strengthening type electric booster type braking apparatus according to claim 5, wherein a hydraulic line is connected to the first and second chambers, respectively, and leads to an ESC that distributes braking hydraulic pressure to a wheel cylinder.
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Publication number Priority date Publication date Assignee Title
KR20140125544A (en) * 2013-04-19 2014-10-29 현대모비스 주식회사 Method of detecting solenoid valve failure of vehicle electric brake booster and Apparatus for detecting failure implementing the same
KR20160019676A (en) * 2014-08-12 2016-02-22 현대자동차주식회사 Electro-hydraulic brake system for vehicle
KR101724969B1 (en) * 2015-12-11 2017-04-07 현대자동차주식회사 Brake system having pedal simulator
US9914439B2 (en) 2015-12-11 2018-03-13 Hyundai Motor Company Brake system having pedal simulator
CN108016420A (en) * 2017-12-20 2018-05-11 芜湖伯特利电子控制系统有限公司 Master cylinder structure of electronic wire control brake system
CN110316170A (en) * 2019-07-19 2019-10-11 赵海荣 A kind of automobile brake aid-device of decoupling
CN110654362A (en) * 2019-10-23 2020-01-07 清华大学 Automobile line control brake system
WO2021133115A1 (en) * 2019-12-27 2021-07-01 주식회사 만도 Electronic brake system and control method therefor
US12291185B2 (en) 2019-12-27 2025-05-06 Hl Mando Corporation Electronic brake system and control method therefor

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