KR100916410B1 - Brake booster for vehicle - Google Patents

Brake booster for vehicle Download PDF

Info

Publication number
KR100916410B1
KR100916410B1 KR1020080051692A KR20080051692A KR100916410B1 KR 100916410 B1 KR100916410 B1 KR 100916410B1 KR 1020080051692 A KR1020080051692 A KR 1020080051692A KR 20080051692 A KR20080051692 A KR 20080051692A KR 100916410 B1 KR100916410 B1 KR 100916410B1
Authority
KR
South Korea
Prior art keywords
plunger
piezoelectric element
valve body
brake booster
casing
Prior art date
Application number
KR1020080051692A
Other languages
Korean (ko)
Inventor
김태헌
Original Assignee
현대자동차주식회사
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 현대자동차주식회사 filed Critical 현대자동차주식회사
Priority to KR1020080051692A priority Critical patent/KR100916410B1/en
Application granted granted Critical
Publication of KR100916410B1 publication Critical patent/KR100916410B1/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
    • B60T13/24—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 gaseous
    • B60T13/46—Vacuum systems
    • B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
    • B60T13/57—Vacuum systems indirect, i.e. vacuum booster units characterised by constructional features of control valves
    • 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
    • B60T13/24—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 gaseous
    • B60T13/46—Vacuum systems
    • B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
    • B60T13/573—Vacuum systems indirect, i.e. vacuum booster units characterised by reaction devices
    • 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
    • B60T13/72—Electrical control in fluid-pressure brake systems in vacuum systems or vacuum booster units
    • 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
    • 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
    • B60T8/321—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 deceleration
    • B60T8/3255—Systems in which the braking action is dependent on brake pedal data
    • B60T8/3275—Systems with a braking assistant function, i.e. automatic full braking initiation in dependence of brake pedal velocity
    • 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
    • B60T2201/00—Particular use of vehicle brake systems; Special systems using also the brakes; Special software modules within the brake system controller
    • B60T2201/03—Brake assistants

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

A brake booster for a vehicle to reduce manufacturing cost is provided to control power assistance ratio arbitrarily by using a piezoelectric element instead of a reaction disk. A brake booster for a vehicle comprises a casing(110), a valve body(120), an input shaft(130), a plunger(140), an output shaft(150) and a piezoelectric element(160). The casing is segmented into a constant pressure chamber and a transformation chamber. The valve body has one end positioned inside the casing and the other end positioned outside the casing. The input shaft is connected to the other end of the valve body. The plunger is prepared at the leading end of the input shaft. The output shaft is prepared at the leading end of the plunger. The piezoelectric element is prepared between the valve body and the plunger. A power supply unit(170) applies electricity on the piezoelectric element in the operation of the brake pedal. The electricity applied on the power supply unit is in proportion to the operating force of the brake pedal.

Description

차량용 브레이크 부스터{BRAKE BOOSTER FOR VEHICLE}Brake Booster for Vehicles {BRAKE BOOSTER FOR VEHICLE}

본 발명은 차량용 브레이크 부스터에 관한 것으로, 구체적으로는 압전소자를 이용하여 배력비를 조절할 수 있는 차량용 브레이크 부스터에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle brake booster, and more particularly, to a vehicle brake booster capable of adjusting a power ratio using a piezoelectric element.

일반적으로 브레이크 부스터(BRAKE BOOSTER)는 진공과 대기압차를 이용하여 작은 힘으로 큰 제동력을 발생시키는 장치이며, 이 제동력을 마스터 실린더에 전달하여 제동유압을 형성한다.In general, a brake booster (BRAKE BOOSTER) is a device that generates a large braking force with a small force using a vacuum and atmospheric pressure difference, and transmits this braking force to the master cylinder to form a braking hydraulic pressure.

종래기술에 의한 차량용 브레이크 부스터는 도 5에 도시된 바와 같이, 다이어프램(12)과 파워피스톤(14)에 의해 정압실(16)과 변압실(18)로 구획되는 케이싱(10)과, 일단은 파워피스톤(14)에 고정되고 타단은 케이싱(10)의 외부로 돌출되는 밸브 몸체(20)와, 상기 밸브 몸체(20)의 타단에 연결되어 브레이크 페달(미도시)의 조작력을 전달하는 입력축(30)과, 상기 밸브 몸체(20)에서 발생한 배력을 마스터실린더(미도시)에 전달하는 출력축(50)을 포함하여 구성된다.As shown in FIG. 5, a vehicle brake booster according to the related art includes a casing 10 partitioned into a constant pressure chamber 16 and a transformer chamber 18 by a diaphragm 12 and a power piston 14, and one end of the casing 10. An input shaft fixed to the power piston 14 and the other end is connected to the valve body 20 protruding to the outside of the casing 10 and the other end of the valve body 20 to transmit an operation force of a brake pedal (not shown) ( 30 and an output shaft 50 for transmitting the back force generated in the valve body 20 to a master cylinder (not shown).

여기서 상기 입력축(30)의 선단에는 인가된 조작력을 출력축(50)으로 전달하는 플런저(60)가 마련되며, 상기 출력축(50)과 플런저(60) 사이에는 탄성재질의 리액션 디스크(70)가 구비된다. 그리고 상기 플런저(60)의 선단과 리액션 디스 크(70) 사이에는 소정의 갭(80)이 존재한다.Here, a plunger 60 is provided at the tip of the input shaft 30 to transmit the applied operating force to the output shaft 50, and an elastic reaction disk 70 is provided between the output shaft 50 and the plunger 60. do. In addition, a predetermined gap 80 exists between the tip of the plunger 60 and the reaction disk 70.

이와 같은 종래의 차량용 브레이크 부스터는 리액션 디스크(70)가 갭(80)을 메우는 동안에는 플런저(60)와 리액션 디스크(70)가 직접 접촉하지 않기 때문에 출력축(50)의 반력이 플런저(60)에 전달되지 않아 입력의 증가 없이도 제동력이 급격히 증가하는 현상이 일어난다. 이를 점프인(JUMP-IN) 효과라 하고 이 때 발생하는 출력값을 점프인값이라 한다. 그 후, 상기 플런저(60)와 리액션 디스크(70)가 접촉하기 시작하면 출력축(50)의 반력이 입력축(30)에 전달되어 입력에 비례하는 출력이 형성된다.In the conventional vehicle brake booster, the reaction force of the output shaft 50 is transmitted to the plunger 60 because the plunger 60 and the reaction disk 70 do not directly contact while the reaction disk 70 fills the gap 80. As a result, the braking force rapidly increases without increasing the input. This is called a jump-in effect. The output value generated at this time is called a jump-in value. Thereafter, when the plunger 60 and the reaction disk 70 start to contact each other, the reaction force of the output shaft 50 is transmitted to the input shaft 30 to form an output proportional to the input.

이러한 차량용 브레이크 부스터의 배력비는 플랜저(60)와 리액션 디스크(70)의 단면적 비로 결정된다. 따라서 각 차종 개발 시 부스터마다 배력비가 다르게 적용되므로, 배력비가 변경되면 밸브 몸체(20)의 금형도 변경하여야 하므로 개발비 지출이 과다해지는 단점이 있다.The power ratio of the vehicle brake booster is determined by the ratio of the cross-sectional area of the flanger 60 and the reaction disk 70. Therefore, since the boosting ratio is applied differently to each booster during development of each vehicle type, there is a disadvantage in that the development cost is excessively increased because the mold of the valve body 20 must also be changed when the boosting ratio is changed.

따라서 본 발명은 상술한 제반 문제점을 해결하기 위한 것으로서 리액션 디스크 대신 압전소자를 이용하므로 배력비를 임의로 조절할 수 있는 차량용 브레이크 부스터를 제공하는데 그 목적이 있다.Accordingly, an object of the present invention is to provide a brake booster for a vehicle that can arbitrarily adjust the power ratio since it uses a piezoelectric element instead of a reaction disk as a solution to the above-mentioned problems.

또한, 본 발명의 다른 목적은 배력비의 임의 조절이 가능해짐과 동시에 형상의 일체화 및 단순화가 가능하므로 개발비 등의 원가를 크게 절감할 수 있는 차량용 브레이크 부스터를 제공하는데 있다.In addition, another object of the present invention is to provide a brake booster for a vehicle that can be arbitrarily adjusted and the power of the power ratio can be integrated at the same time, the shape of the development can be greatly reduced.

상술한 목적을 달성하기 위한 본 발명에 의한 차량용 브레이크 부스터는, 정압실과 변압실로 구획되는 케이싱과, 일단은 케이싱 내부에 위치되고 타단은 케이싱의 외부로 돌출되는 밸브 몸체와, 밸브 몸체의 타단에 연결되는 입력축과, 입력축의 선단에 마련되는 플런저와, 플런저의 선단에 마련되는 출력축과, 밸브 몸체와 플런저 사이에 마련되는 압전소자를 포함하여 구성된다. 또한, 브레이크 페달 조작 시 압전소자에 전기를 인가하는 전원부를 더 포함하여 구성된다.Vehicle brake booster according to the present invention for achieving the above object, the casing is divided into a constant pressure chamber and a transformer chamber, one end is located inside the casing and the other end is connected to the other end of the casing and the valve body, the other end of the valve body And an input shaft, a plunger provided at the tip of the input shaft, an output shaft provided at the tip of the plunger, and a piezoelectric element provided between the valve body and the plunger. In addition, the brake pedal is configured to further include a power supply for applying electricity to the piezoelectric element.

본 발명에 의한 차량용 브레이크 부스터는 리액션 디스크 대신 압전소자를 사용하므로 배력비를 임의로 조절할 수 있고, 그에 따라 부스터의 형상을 일체화 및 단순화할 수 있으며, 개발비 등의 원가를 크게 절감할 수 있다.Since the brake booster for a vehicle according to the present invention uses a piezoelectric element instead of a reaction disk, it is possible to arbitrarily adjust the power ratio, thereby consolidating and simplifying the shape of the booster and greatly reducing the cost of development costs.

첨부된 도면을 참조하여 본 발명에 따른 실시예를 상세히 설명한다.With reference to the accompanying drawings will be described embodiments of the present invention;

도 1은 본 발명에 의한 차량용 브레이크 부스터를 도시하는 단면도이다.1 is a cross-sectional view showing a brake booster for a vehicle according to the present invention.

도 1에 도시된 바와 같이, 본 발명에 의한 차량용 브레이크 부스터는, 케이싱(110), 밸브 몸체(120), 입력축(130), 플런저(140), 출력축(150), 압전소자(160) 및 전원부(170)를 포함하여 구성된다.As shown in FIG. 1, the vehicle brake booster according to the present invention includes a casing 110, a valve body 120, an input shaft 130, a plunger 140, an output shaft 150, a piezoelectric element 160, and a power supply unit. And 170.

상술한 각 구성요소에 대해 살펴보면, 우선 상기 케이싱(110)은 내부에 소정의 공간이 마련되도록 밀봉 결합되는 프론트쉘(112)과 리어쉘(114)로 이루어진다. 상기 프론트쉘(112)과 리어쉘(114)의 내부에는 다이어프램(116) 및 파워피스톤(118)이 마련되어 내부 공간을 정압실(180)과 변압실(190)로 구획한다.Looking at each of the components described above, first, the casing 110 is composed of a front shell 112 and a rear shell 114 is sealed to provide a predetermined space therein. The diaphragm 116 and the power piston 118 are provided inside the front shell 112 and the rear shell 114 to divide the internal space into the positive pressure chamber 180 and the transformer chamber 190.

상기 밸브 몸체(120)는 그 일단이 상기 파워피스톤(118)의 중앙부에 고정되고 타단은 케이싱(110) 외부로 돌출되며, 그 내부는 중공으로 공기흡입부(122)가 형성된다. 또한, 상기 밸브 몸체(120)에는 정압실(180)과 변압실(190)을 연통되도록 하기 위한 제 1 통로(124)와, 변압실(190)에 대기압 또는 부압이 선택적으로 형성되도록 하는 제 2 통로(126)가 형성된다.One end of the valve body 120 is fixed to the center portion of the power piston 118 and the other end is protruded to the outside of the casing 110, the inside of the air intake 122 is formed in a hollow. In addition, the valve body 120 has a first passage 124 for communicating the constant pressure chamber 180 and the transformer chamber 190, and a second pressure for selectively forming atmospheric pressure or negative pressure in the transformer chamber 190. A passage 126 is formed.

상기 입력축(130)은 밸브 몸체(120)의 타단에 연결되어 브레이크 페달(미도시)의 조작력을 전달하는 수단으로, 다단의 단차를 가지며 그 선단에는 입력축(130)에 인가된 조작력을 출력축(150)에 전달하는 플런저(140)가 연결된다. 또한, 상기 밸브 몸체(120)와 플런저(140) 사이에는 배력을 발생하는 압전소자(160)가 마련된다. 또한, 상기 케이싱(110)의 외부에는 브레이크 페달 조작 시 상기 압전소자(160)에 전기를 인가하는 전원부(170)가 마련된다.The input shaft 130 is connected to the other end of the valve body 120 as a means for transmitting the operating force of the brake pedal (not shown), and has a multi-stage step, the front end of the output force applied to the input shaft 130 output shaft 150 Plunger 140 is delivered to the) is connected. In addition, between the valve body 120 and the plunger 140 is provided with a piezoelectric element 160 for generating a back force. In addition, a power supply unit 170 for applying electricity to the piezoelectric element 160 when the brake pedal is operated is provided outside the casing 110.

여기서 압전소자란, 기계적 힘(압력)을 주면 전기가 발생하고, 반대로 전기를 인가하면 기계적 힘(체적 증대)이 발생하는 소자로, 일명 피에죠소자(piezoelectric element)라고도 한다. 이러한 압전소자로는 수정, 전기석, 로셸염 등이 사용되어 왔으며, 근래에 개발된 티탄산바륨, 인산이수소암모늄, 타르타르산에틸렌디아민 등의 인공결정도 사용되는 추세이다.Here, the piezoelectric element is an element in which electricity is generated when a mechanical force (pressure) is applied. On the contrary, a piezoelectric element is also called a piezoelectric element. Crystals, tourmaline, Rochelle salt, and the like have been used as such piezoelectric elements, and artificial crystals such as barium titanate, ammonium dihydrogen phosphate, and ethylene diamine tartrate have been recently used.

즉, 브레이크 페달 조작하면, 전원부(170)에서 전력을 발생하여 압전소자(160)로 인가하고, 인가된 전원에 의해 압전소자(160)의 체적이 늘어나며 플런저(140)를 밀어 배력작용을 한다.That is, when the brake pedal is operated, electric power is generated by the power supply unit 170 to be applied to the piezoelectric element 160, and the volume of the piezoelectric element 160 is increased by the applied power and pushes the plunger 140 to act as a booster.

이때, 상기 전원부(170)에서 인가되는 전력은 브레이크 페달의 조작력에 비례하고, 상기 압전소자(160)의 두께는 배력비와 비례한다. 이를 좀 더 상세히 설명하면, 브레이크 페달의 조작력이 클 경우 전원부(170)에서 발생되어 압전소자(160)로 인가되는 전력도 커지며, 그에 따라 압전소자(160)의 체적도 상대적으로 증가한다. 또한, 상기 압전소자(160)의 두께가 두꺼울수록 체적의 증대량도 증가하므로 배력비와 비례하게 된다.At this time, the power applied from the power supply unit 170 is proportional to the operation force of the brake pedal, the thickness of the piezoelectric element 160 is proportional to the power ratio. In more detail, when the operation force of the brake pedal is large, the power generated by the power supply unit 170 and applied to the piezoelectric element 160 also increases, thereby increasing the volume of the piezoelectric element 160 relatively. In addition, as the thickness of the piezoelectric element 160 increases, the increase in volume also increases, so that it is proportional to the power ratio.

한편, 상기 공기흡입부(122)에는 외기의 유입을 단속하는 포펫밸브(210)와, 포펫밸브(210)의 후단부를 공기흡입부(122)의 내주면에 기밀하게 고정하는 포펫리테이너(220)가 설치된다. 또한, 상기 공기흡입부(122)의 후단부에는 공기 중의 이물질을 거르기 위한 필터(230)와 흡입소음을 감소시키기 위한 소음기(240)가 설치된다. 또한, 상기 포펫리테이너(220)와 입력축(130)의 단차 사이에는 입력축(130)을 후방으로 복귀시키는 원뿔형의 압축코일스프링(250)이 설치되며, 상기 포펫밸 브(210)의 선단부와 입력축(130)의 또 다른 단차 사이에는 포펫밸브(210)의 기밀 유지를 위하여 원뿔형의 압축코일스프링(260)이 설치된다.On the other hand, the air suction unit 122 has a poppet valve 210 for controlling the inflow of outside air, and a poppet retainer 220 for hermetically fixing the rear end of the poppet valve 210 to the inner circumferential surface of the air suction unit 122. Is installed. In addition, the rear end of the air suction unit 122 is provided with a filter 230 for filtering foreign matter in the air and a silencer 240 for reducing the suction noise. In addition, a conical compression coil spring 250 for returning the input shaft 130 to the rear is provided between the poppet retainer 220 and the step of the input shaft 130, and the front end of the poppet valve 210 and the input shaft ( Between the steps of 130, a conical compression coil spring 260 is installed to maintain the air tightness of the poppet valve 210.

도 2 내지 도 4는 본 발명에 의한 차량용 브레이크 부스터의 작동과정을 도시하는 도면으로, 도면을 참조하여 상술한 바와 같이 구성된 본 발명에 의한 차량용 브레이크 부스터의 작동과정을 살펴보도록 한다.2 to 4 is a view showing the operation of the vehicle brake booster according to the present invention, look at the operation of the vehicle brake booster according to the present invention configured as described above with reference to the drawings.

도 2는 브레이크 페달을 조작하지 아니한 상태로, 상기 플런저(140)의 선단과 출력축(150) 사이에는 소정의 갭(270)이 존재한다. 이 상태에서 브레이크 페달을 조작하여 포펫밸브(210)가 열리면, 대기가 유입되며 밸브 몸체(120)가 출력축(150)을 가압한다. 이때, 상술한 갭(270)으로 인하여 출력축(150)의 반력이 플런저(140)에 전달되지 아니하므로, 페달을 조작할 경우 입력의 증가 없이도 제동력이 급격히 증가하는 점프인(JUMP-IN) 효과가 발생한다.FIG. 2 illustrates a gap 270 between the front end of the plunger 140 and the output shaft 150 without the brake pedal being operated. When the poppet valve 210 is opened by operating the brake pedal in this state, air is introduced and the valve body 120 presses the output shaft 150. At this time, since the reaction force of the output shaft 150 is not transmitted to the plunger 140 due to the gap 270 described above, a jump-in effect in which the braking force rapidly increases without increasing the input when the pedal is operated is increased. Occurs.

그 후, 브레이크 페달의 조작으로 전원부(도 1의 170)에서 전력을 발생하면, 그 전력에 의해 압전소자(160)의 체적이 늘어나며 플런저(140)를 밀어 배력작용을 한다(도 3 참조). 이때, 도면상에는 밸브 몸체(120)와 출력축(150)이 접촉한 것으로 도시되었으나, 도면과 달리 접촉되지 않더라도 작동상의 문제는 없다. 그 이유는 밸브 몸체(120)에서 미는 힘이 압전소자(160)와 접촉된 면에서 계속 밀어주고 있기 때문이다.Thereafter, when electric power is generated in the power supply unit 170 of the brake pedal, the volume of the piezoelectric element 160 is increased by the electric power, and the plunger 140 is pushed to perform the boosting operation (see FIG. 3). At this time, although the valve body 120 and the output shaft 150 is shown in contact with the drawing, unlike the drawing does not have a problem in operation even if not in contact. The reason is that the pushing force in the valve body 120 continues to push on the surface in contact with the piezoelectric element 160.

한편, 도 4와 같은 knee point 구간에서는 플런저(140)와 출력축(150)이 계속 접촉된 상태를 유지하고, 압전소자(160)의 체적은 최대로 증대된 상태이며, 플런저(140)와 키(280)가 접촉되어 밸브 몸체(120)를 밀어주므로 압력하중이 배력 없 이 1:1로 출력축에 전달된다.Meanwhile, in the knee point section as shown in FIG. 4, the plunger 140 and the output shaft 150 remain in contact with each other, and the volume of the piezoelectric element 160 is increased to the maximum, and the plunger 140 and the key ( 280 is contacted to push the valve body 120, the pressure load is transmitted to the output shaft in a 1: 1 ratio without the force.

상술한 바와 같은, 본 발명의 바람직한 실시예에 따른 차량용 브레이크 부스터의 구성 및 작동과정을 상기한 설명 및 도면에 따라 도시하였지만, 이는 예를 들어 설명한 것에 불과하며 본 발명의 기술적 사상을 벗어나지 않는 범위 내에서 다양한 변화 및 변경이 가능하다는 것을 이 분야의 통상적인 기술자들은 잘 이해할 수 있을 것이다.As described above, the configuration and operation of the brake booster for a vehicle according to a preferred embodiment of the present invention have been shown in accordance with the above description and drawings, but this is merely described for example and is within the scope without departing from the spirit of the present invention. It will be understood by those skilled in the art that various changes and modifications are possible in the art.

도 1은 본 발명에 의한 차량용 브레이크 부스터를 도시하는 단면도.1 is a cross-sectional view showing a brake booster for a vehicle according to the present invention.

도 2 내지 도 4는 본 발명에 의한 차량용 브레이크 부스터의 작동과정을 도시하는 도면.2 to 4 are views showing the operation of the vehicle brake booster according to the present invention.

도 5는 종래기술에 의한 차량용 브레이크 부스터를 도시하는 단면도.5 is a cross-sectional view showing a brake booster for a vehicle according to the prior art.

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

110: 케이싱 120: 밸브 몸체110: casing 120: valve body

130: 입력축 140: 플런저130: input shaft 140: plunger

150: 출력축 160: 압전소자150: output shaft 160: piezoelectric element

170: 전원부170: power supply

Claims (4)

정압실과 변압실로 구획되는 케이싱;A casing partitioned into a constant pressure chamber and a transformer chamber; 일단은 케이싱 내부에 위치되고 타단은 케이싱의 외부로 돌출되는 밸브 몸체;One end is located in the casing and the other end is the valve body protruding out of the casing; 밸브 몸체의 타단에 연결되는 입력축;An input shaft connected to the other end of the valve body; 입력축의 선단에 마련되는 플런저;A plunger provided at the tip of the input shaft; 플런저의 선단에 마련되는 출력축; 및An output shaft provided at the tip of the plunger; And 밸브 몸체와 플런저 사이에 마련되는 압전소자를 포함하여 구성되는 것을 특징으로 하는 차량용 브레이크 부스터.Brake booster for a vehicle comprising a piezoelectric element provided between the valve body and the plunger. 제 1 항에 있어서,The method of claim 1, 브레이크 페달 조작 시 압전소자에 전기를 인가하는 전원부를 더 포함하여 구성되는 것을 특징으로 하는 차량용 브레이크 부스터.The brake booster for a vehicle, characterized in that it further comprises a power supply for applying electricity to the piezoelectric element when operating the brake pedal. 제 2 항에 있어서,The method of claim 2, 상기 전원부에서 인가되는 전력은 브레이크 페달의 조작력에 비례하는 것을 특징으로 하는 차량용 브레이크 부스터.The power applied by the power supply is a vehicle brake booster, characterized in that proportional to the operating force of the brake pedal. 제 3 항에 있어서,The method of claim 3, wherein 상기 압전소자의 두께는 배력비와 비례하는 것을 특징으로 하는 차량용 브레이크 부스터.The thickness of the piezoelectric element is a brake booster for a vehicle, characterized in that proportional to the power ratio.
KR1020080051692A 2008-06-02 2008-06-02 Brake booster for vehicle KR100916410B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080051692A KR100916410B1 (en) 2008-06-02 2008-06-02 Brake booster for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080051692A KR100916410B1 (en) 2008-06-02 2008-06-02 Brake booster for vehicle

Publications (1)

Publication Number Publication Date
KR100916410B1 true KR100916410B1 (en) 2009-09-07

Family

ID=41355510

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020080051692A KR100916410B1 (en) 2008-06-02 2008-06-02 Brake booster for vehicle

Country Status (1)

Country Link
KR (1) KR100916410B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016188674A1 (en) * 2015-05-27 2016-12-01 Robert Bosch Gmbh Device for varying a pedal resistance, brake system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54171083U (en) 1978-05-23 1979-12-03
JPS6078849A (en) 1983-10-05 1985-05-04 Nissan Motor Co Ltd Brake booster
JPS61287856A (en) 1985-06-14 1986-12-18 Nippon Denso Co Ltd Brake control device in vehicle
JPH04262958A (en) * 1990-09-28 1992-09-18 Bendix Europ Services Technic Vacuum booster

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54171083U (en) 1978-05-23 1979-12-03
JPS6078849A (en) 1983-10-05 1985-05-04 Nissan Motor Co Ltd Brake booster
JPS61287856A (en) 1985-06-14 1986-12-18 Nippon Denso Co Ltd Brake control device in vehicle
JPH04262958A (en) * 1990-09-28 1992-09-18 Bendix Europ Services Technic Vacuum booster

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016188674A1 (en) * 2015-05-27 2016-12-01 Robert Bosch Gmbh Device for varying a pedal resistance, brake system
US20180148029A1 (en) * 2015-05-27 2018-05-31 Robert Bosch Gmbh Device for Varying a Pedal Resistance, Brake System

Similar Documents

Publication Publication Date Title
KR100916410B1 (en) Brake booster for vehicle
JP2001158345A (en) Piezoelectrically operated pump for hydraulic vehicle brake device and method for operating vehicle brake device
US8196505B2 (en) Brake booster
KR100415194B1 (en) Power booster for vehicle brake
US20130104728A1 (en) Booster assembly for vehicle
KR0122143Y1 (en) Booster of a brake
KR100931086B1 (en) Car brake booster
KR101157795B1 (en) A Brake Booster for Vehicle
KR100536296B1 (en) Brake booster for vehicle
JPH07117660A (en) Brake reactive force transmission mechanism
KR100383580B1 (en) Center plate sealing device of tandem booster for car
KR20110033616A (en) Brake for vehicles
KR100655466B1 (en) Brake booster for automobile
KR20050046233A (en) Brake booster with double hardness reaction disk
JP2014210448A (en) Pneumatic booster
KR20100023667A (en) Brake booster
KR100916397B1 (en) Brake booster for vehicle
KR100657585B1 (en) brake booster for vehicle
KR100771022B1 (en) Brake booster for automobile
KR20070072703A (en) A brake booster of vehicle
KR100848266B1 (en) Input rod of booster in a vehicle
KR100673056B1 (en) Brake booster for automobile
KR100655451B1 (en) Brake booster with bolt
KR20110125133A (en) Brake booster for vehicle
KR101138826B1 (en) Tandem type brake booster

Legal Events

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

Payment date: 20120831

Year of fee payment: 4

FPAY Annual fee payment

Payment date: 20130830

Year of fee payment: 5

FPAY Annual fee payment

Payment date: 20140901

Year of fee payment: 6

FPAY Annual fee payment

Payment date: 20150831

Year of fee payment: 7

LAPS Lapse due to unpaid annual fee