KR101449050B1 - Brake for fuel cell vehicle - Google Patents

Brake for fuel cell vehicle Download PDF

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Publication number
KR101449050B1
KR101449050B1 KR1020080104554A KR20080104554A KR101449050B1 KR 101449050 B1 KR101449050 B1 KR 101449050B1 KR 1020080104554 A KR1020080104554 A KR 1020080104554A KR 20080104554 A KR20080104554 A KR 20080104554A KR 101449050 B1 KR101449050 B1 KR 101449050B1
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South Korea
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negative pressure
fuel cell
air blower
brake booster
vacuum pump
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KR1020080104554A
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Korean (ko)
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KR20100045573A (en
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전강식
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현대자동차주식회사
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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
    • 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
    • B60T8/38—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 including valve means of the relay or driver controlled type
    • 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
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/70—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by fuel cells
    • B60L50/72—Constructional details of fuel cells specially adapted for electric vehicles
    • 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
    • B60T8/4077—Systems in which the booster is used as an auxiliary pressure source
    • 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
    • B60Y2400/20—Energy converters
    • B60Y2400/202—Fuel cells
    • 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
    • B60Y2400/306—Pressure sensors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
    • H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Fuel Cell (AREA)

Abstract

본 발명은 연료전지차량용 제동장치에 관한 것으로서, 에어블로워의 입구단에 발생된 부압을 이용하여 브레이크 부스터를 작동함으로써, 기존의 진공펌프 및 진공펌프 스위치를 삭제하여 차량의 원가절감이 가능하고, 추가 전력 소모 없이 경량화를 통한 연비를 향상시킬 수 있다.The present invention relates to a braking device for a fuel cell vehicle, in which a brake booster is operated by using a negative pressure generated at an inlet end of an air blower to reduce a cost of a vehicle by eliminating a conventional vacuum pump and a vacuum pump switch, It is possible to improve the fuel efficiency by reducing the weight without power consumption.

또한, 기존의 많은 추가 장치 및 비용 없이 기존에 연료전지시스템에 장착된 에어블로워를 이용하여 부압제공이 가능하므로 본 기술의 적용이 용이하고, 기존의 진공펌프 및 진공펌프 스위치를 이용한 제동장치에서 안고 있는 위험요소(작동불능 또는 퓨즈단선)를 제거함으로써 보다 안정적인 차량 제동이 가능한 장점이 있다.In addition, since it is possible to provide a negative pressure by using an air blower installed in a fuel cell system without many existing additional apparatuses and costs, it is easy to apply the present technology, and a braking device using a conventional vacuum pump and a vacuum pump switch There is an advantage that more stable vehicle braking can be performed by eliminating the risk factor (malfunction or fuse disconnection).

브레이크 부스터, 에어블로워, 부압라인, 릴리프 밸브 Brake booster, air blower, negative pressure line, relief valve

Description

연료전지차량용 제동장치{Brake for fuel cell vehicle}[0001] BRAKE FOR FUEL CELL VEHICLE [0002]

본 발명은 연료전지차량용 제동장치에 관한 것으로서, 더욱 상세하게는 에어블로워 입구단의 부압을 이용하여 보다 효율적이 안정적으로 차량을 제동할 수 있는 연료전지차량용 제동장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a braking device for a fuel cell vehicle, and more particularly, to a braking device for a fuel cell vehicle capable of braking a vehicle more efficiently and stably using a negative pressure at an inlet end of an air blower.

자동차에 있어서 브레이크는 주행중 운전자의 발로 조작하는 풋 브레이크와, 주차시에 손으로 조작하는 주차 브레이크로 나뉘는데, 이중 풋 브레이크는 주행중에 사용하는 것이므로 신속·정확한 제동은 물론 적은 힘으로도 용이하게 조작할 수 있어야 되며, 이를 위하여 풋 브레이크(이하 '브레이크'로 칭함)는 비교적 적은 답력으로 확실히 제동할 수 있는 유압식 브레이크가 주로 사용되고 있다.In automobiles, the brakes are divided into a foot brake to be operated by the driver's feet while the driver is in operation and a parking brake to be operated by hand at the time of parking. Since the dual foot brake is used during driving, (Hereinafter referred to as "brake") is mainly used as a hydraulic brake capable of reliably braking with a relatively small steering force.

그리고 최근에는 자동차가 대형화 및 고속화됨에 따라 큰 제동력이 요구되는데, 유압식 브레이크는 그 구조적인 특성상 제동력 증대에 한계가 있다.In recent years, a large braking force is required as a vehicle becomes larger and faster. However, hydraulic brakes have a limitation in increasing the braking force due to their structural characteristics.

이에 따라 유압식 브레이크에 배력장치인 부스터를 구비하여, 동일한 답력으로도 수배의 제동력을 발생시킴으로써, 고속 및 대형 차량을 적은 답력으로 확실하 게 제동시킬 수 있도록 하는 것이 일반적이다.Accordingly, it is general to provide a booster, which is a booster device, to the hydraulic brake, so that the braking force of several times is generated even with the same pressing force, so that the high speed and the large vehicle can be reliably braked with a small pressing force.

이러한 브레이크 부스터는 흡기 매니폴드 또는 진공펌프에서 발생한 진공과 대기압의 차이 압력을 이용하는 진공식과, 압축공기의 압력을 이용하는 압축 공기식으로 대별된다.Such a brake booster is roughly classified into a vacuum formula using a differential pressure between a vacuum and an atmospheric pressure generated in an intake manifold or a vacuum pump, and a compressed air type using a pressure of compressed air.

상기와 같은 브레이크 부스터에 있어서, 본 발명과 관계되는 현행 연료전지 차량에서 진공식 브레이크 부스터의 종래 구성을 살펴보면, 도 3와 같이 구성되는데, 이의 브레이크 부스터(100)는 브레이크 페달과 마스터 실린더(C) 사이에 배치된다.3, the brake booster 100 includes a brake pedal and a master cylinder C, and the brake booster 100 is connected to the brake pedal and the master cylinder C, Respectively.

이러한 브레이크 부스터(100)는 진공펌프를 이용하여 부압을 발생시키고, 이 부압과 대기압의 압력차이를 이용하여 강력한 힘으로 마스터 실린더의 피스톤을 누름으로써 브레이크측의 실린더 내에 큰 압력을 발생시켜 차량을 제동시킨다. The brake booster 100 generates a negative pressure by using a vacuum pump and generates a large pressure in the cylinder on the brake side by pressing the piston of the master cylinder with a strong force using the difference in pressure between the negative pressure and the atmospheric pressure, .

이때, 진공펌프의 작동은 진공펌프 스위치에 의해 온 또는 오프되며, 진공펌프 스위치는 라인 내에 일정한 압력 이상의 진공이 형성되면 전원을 차단하여 펌프가 불필요하게 동작하는 것을 방지해 준다.At this time, the operation of the vacuum pump is turned on or off by the vacuum pump switch, and when the vacuum pump switch has a vacuum of more than a predetermined pressure in the line, the power supply is cut off to prevent the pump from unnecessarily operating.

그러나, 현행 연료전지 차량용 진공식 브레이크 부스터와 같이 진공펌프 및 진공펌프 스위치를 사용하는 경우에 제조원가 및 차량의 중량이 증가하고, 차량 레이아웃에 불리한 단점이 있다.However, in the case of using a vacuum pump and a vacuum pump switch as in the case of a conventional brake booster for a fuel cell vehicle, manufacturing cost and weight of the vehicle are increased, which is disadvantageous to vehicle layout.

또한, 주행 중 퓨즈 단선 또는 진공펌프 및 진공펌프 스위치 등의 고장으로 인해 차량 주행안정성에 심각한 위험요소를 초래하는 요인이 된다.In addition, the breakage of the fuse during traveling or the malfunction of the vacuum pump and the vacuum pump switch cause a serious risk to the stability of the running of the vehicle.

본 발명은 상기와 같은 점을 감안하여 안출한 것으로서, 연료전지스택에 공기를 공급하기 위해 탑재된 에어블로워 입구단의 부압을 이용하여 브레이크 부스터를 작동시킴으로써, 기존의 진공펌프 및 진공펌프 스위치를 삭제하여 경량화 및 원가 절감에 기여할 수 있고, 보다 효율적이고 안정적으로 차량을 제동할 수 있도록 한 연료전지차량용 제동장치를 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a fuel cell stack in which a conventional vacuum pump and a vacuum pump switch are removed by operating a brake booster by using a negative pressure at an inlet end of an air blower, Which can contribute to weight saving and cost reduction, and to more effectively and stably braking the vehicle.

상기한 목적은 연료전지차량용 제동장치에 있어서,The above object is achieved by a braking device for a fuel cell vehicle,

대기압과 부압의 차이를 이용하여 마스터 실린더의 피스톤을 가압하는 브레이크 부스터; 및 상기 브레이크 부스터와 연결되어 부압을 공급하는 에어블로워를 포함하고, 상기 브레이크 부스터는 에어블로워에서 발생된 부압으로 작동하는 것을 특징으로 하는 연료전지차량용 제동장치에 의해 달성된다.A brake booster for pressing the piston of the master cylinder using the difference between the atmospheric pressure and the negative pressure; And an air blower connected to the brake booster to supply a negative pressure, wherein the brake booster operates with a negative pressure generated in the air blower.

바람직하게는, 상기 브레이크 부스터는 에어블로워의 입구단과 연통되도록 설치된 부압라인과, 상기 부압라인의 압력을 일정하게 유지시켜주도록 부압라인에 설치된 릴리프 밸브를 포함한다.Preferably, the brake booster includes a negative pressure line provided to communicate with an inlet end of the air blower, and a relief valve installed in the negative pressure line to maintain the pressure of the negative pressure line constant.

특히, 상기 부압라인에 설치된 압력센서와, 상기 압력센서로부터 감지신호를 입력받아 릴리프밸브의 작동을 제어하는 제어부를 더 포함한다.In particular, the apparatus further includes a pressure sensor installed in the negative pressure line, and a control unit receiving the detection signal from the pressure sensor and controlling the operation of the relief valve.

이에 따라 본 발명에 따른 연료전지차량용 제동장치에 의하면, 에어블로워의 입구단에 발생된 부압을 이용하여 브레이크 부스터를 작동함으로써, 기존의 진공펌프 및 진공펌프 스위치를 삭제하여 차량의 원가절감이 가능하고, 추가 전력 소모 없이 경량화를 통한 연비를 향상시킬 수 있다.Therefore, according to the braking device for a fuel cell vehicle according to the present invention, by operating the brake booster by using the negative pressure generated at the inlet end of the air blower, the existing vacuum pump and vacuum pump switch can be eliminated, , It is possible to improve the fuel efficiency by reducing the weight without additional power consumption.

또한, 기존의 많은 추가 장치 및 비용 없이 기존에 연료전지시스템에 장착된 에어블로워를 이용하여 부압제공이 가능하므로 본 기술의 적용이 용이하고, 기존의 진공펌프 및 진공펌프 스위치를 이용한 제동장치에서 안고 있는 위험요소(작동불능 또는 퓨즈단선)를 제거함으로써 보다 안정적인 차량 제동이 가능한 장점이 있다.In addition, since it is possible to provide a negative pressure by using an air blower installed in a fuel cell system without many existing additional apparatuses and costs, it is easy to apply the present technology, and a braking device using a conventional vacuum pump and a vacuum pump switch There is an advantage that more stable vehicle braking can be performed by eliminating the risk factor (malfunction or fuse disconnection).

이하, 본 발명의 바람직한 실시예를 첨부도면을 참조로 상세하게 설명한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

첨부한 도 2는 본 발명에 따른 연료전지차량용 제동장치의 구성을 나타내는 구성도이다.2 is a configuration diagram showing the configuration of a braking device for a fuel cell vehicle according to the present invention.

본 발명은 보다 효율적이고 안정적인 차량 제동을 위한 에어블로워(172) 입구단의 부압을 이용하는 연료전지차량용 제동장치에 관한 것으로서, 연료전지차량에 탑재된 에어블로워(172)의 입구단에 발생된 부압을 브레이크 부스터(13)에 제공하여 보다 안정적으로 차량을 제동시킬 수 있는 기술에 관한 것이며, 종래와 같이 진공 펌프나 진공 펌프 스위치를 이용하는 대신, 기존에 장착된 에어블로워(172)를 이용하여 추가 전력 소모 없이 보다 향상된 차량 안정성을 제공할 수 있는 기술을 제시한다.The present invention relates to a braking device for a fuel cell vehicle that utilizes a negative pressure at the inlet end of an air blower 172 for more efficient and stable vehicle braking and is capable of reducing the negative pressure generated at the inlet end of the air blower 172 mounted on the fuel cell vehicle The present invention relates to a technique for providing a brake booster (13) for braking a vehicle more stably. In addition to using a vacuum pump or a vacuum pump switch as in the prior art, an existing air blower (172) And provides a technology that can provide better vehicle stability without the need for a vehicle.

연료전지 시스템은 연료가 가지고 있는 화학에너지를 연료전지 스택(15) 내에서 전기화학적으로 반응시켜 직접 전기에너지로 변환시키는 일종의 발전시스템이다.The fuel cell system is a kind of power generation system in which the chemical energy of the fuel is electrochemically reacted in the fuel cell stack 15 and directly converted into electric energy.

이러한 연료전지 시스템은 크게 전기에너지를 발생시키는 연료전지 스택(15), 연료전지 스택(15)에 연료인 수소를 공급하는 수소공급장치(16), 연료전지 스택(15)에 전기화학반응에 필요한 산화제인 공기(산소)를 공급하는 공기(산소)공급장치, 연료전지 스택(15)의 반응열을 시스템 외부로 제거하고 연료전지 스택(15)의 운전온도를 제어하며 물 관리 기능을 수행하는 열/물 관리계(18)(Thermal Management System, TMS)를 포함하여 구성된다. This fuel cell system mainly includes a fuel cell stack 15 for generating electrical energy, a hydrogen supply device 16 for supplying hydrogen as fuel to the fuel cell stack 15, An air (oxygen) supply device for supplying air (oxygen) which is an oxidant to the outside of the fuel cell stack 15, a heat / And a water management system 18 (Thermal Management System, TMS).

여기서, 수소공급장치(16)는 수소탱크(161), 고압/저압 레귤레이터, 수소 재순환 장치 등을 포함하고, 공기공급장치(17)는 에어블로워(172), 가습기(173) 등을 포함하며, 열 및 물 관리계(18)는 워터펌프(181), 라디에이터(183) 등을 포함한다.Here, the hydrogen supply device 16 includes a hydrogen tank 161, a high-pressure / low-pressure regulator, a hydrogen recirculation device, etc., and the air supply device 17 includes an air blower 172, a humidifier 173, The heat and water management system 18 includes a water pump 181, a radiator 183, and the like.

이 중에서 연료전지 시스템의 에어블로워(172)는 하우징과, 회전력을 만들기 위한 모터와, 공기 흡입을 위한 블레이드를 포함하여 구성되며, 연료전지 스택(15)에 고압 및 고유량의 공기를 공급하기 위해 상기 모터 및 블레이드는 고속으로 회전하게 된다.Among them, the air blower 172 of the fuel cell system includes a housing, a motor for generating rotational force, and a blade for air suction, and is configured to supply high pressure and high flow rate air to the fuel cell stack 15 The motor and the blade rotate at a high speed.

여기서, 현재 연료전지차량에 탑재된 에어블로워(172)는 100kW급의 고성능 블로워로서, 연료전지시스템이 구동되고 있는 한 계속 작동하게 되므로 추가 전력 소모 없이 안정적이고 지속적으로 부압을 발생시키게 된다.Here, the air blower 172 mounted on the fuel cell vehicle at present is a high-performance blower of 100 kW class, and continuously operates as long as the fuel cell system is driven, so that negative pressure is generated stably and continuously without additional power consumption.

상기 에어블로워(172)의 입구단에는 브레이크 부스터(13)와 연통되도록 부압라인(19)이 설치되고, 부압라인(19)에는 릴리프 밸브(20)를 설치한다.A negative pressure line 19 is provided at the inlet end of the air blower 172 so as to communicate with the brake booster 13 and a relief valve 20 is provided at the negative pressure line 19.

이때, 상기 릴리프 밸브(20)는 부압라인(19) 내 일정한 압력 이상의 진공이 형성되면 제어부의 제어신호를 입력받아 릴리프 밸브(20)가 닫히게 되며, 기준 압력 미만으로 떨어지면 다시 릴리프 밸브(20)가 작동하여 열림상태로 되게 된다.At this time, the relief valve 20 receives a control signal of the control unit when a vacuum of more than a certain pressure is formed in the negative pressure line 19, and the relief valve 20 is closed. When the pressure drops below the reference pressure, So that it is in an open state.

그리고, 부압라인(19)의 압력을 측정하기 위해 부압라인(19)에 압력센서가 설치되게 되며, 압력센서는 부압라인(19) 외에 브레이크 부스터(13) 내에 설치될 수 있다.Then, a pressure sensor is installed on the negative pressure line 19 to measure the pressure of the negative pressure line 19, and the pressure sensor can be installed in the brake booster 13 in addition to the negative pressure line 19. [

이와 같은 구성에 의한 본 발명에 따른 연료전지차량용 제동장치의 작동상태를 설명하면 다음과 같다.The operation of the braking device for a fuel cell vehicle according to the present invention will now be described.

운전자가 브레이크 페달(14)을 밟으면 페달센서가 이를 감지하여 제어부에 브레이크 신호를 발생시키고 제어부의 브레이크 제어신호에 따라 에어블로워(172)의 입구단과 브레이크 부스터(13)를 연결하는 부압라인(19)에 설치된 압력센서가 부압라인(19)의 압력을 체크한다.When the driver depresses the brake pedal 14, the pedal sensor senses the brake pedal 14 and generates a brake signal to the control unit. The negative pressure line 19 connects the inlet end of the air blower 172 and the brake booster 13 according to the brake control signal of the control unit. The pressure of the negative pressure line 19 is checked.

상기 부압라인(19)의 압력이 기준압력 보다 작은 경우에는 릴리프 밸브(20)에 작동신호를 보내어 열림상태로 되며, 릴리프 밸브(20)를 통해 에어블로워(172)의 입구단에 형성된 부압에 의해 브레이크 부스터(13) 내의 압력이 진공상태로 되게 된다.When the pressure of the negative pressure line 19 is lower than the reference pressure, an operation signal is sent to the relief valve 20 to be opened. By the negative pressure formed at the inlet end of the air blower 172 through the relief valve 20 The pressure in the brake booster 13 becomes a vacuum state.

상기 브레이크 부스터(13)는 에어블로워(172)의 입구단에 형성된 부압(진공압)과 대기압의 차이를 이용하여 마스터 실린더(12)의 피스톤을 가압함으로써, 브 레이크 패드(11)를 통해 휠디스크(10)에 제동력을 가하게 된다.The brake booster 13 presses the piston of the master cylinder 12 using the difference between the negative pressure (vacuum pressure) formed at the inlet end of the air blower 172 and the atmospheric pressure, (10).

이와 같이 본 발명에 따른 에어블로워(172)에서 발생하는 부압을 이용하여 추가 전력 소모 없이 브레이크 부스터(13)를 작동시킴으로써, 기존의 진공펌프 및 진공스위치의 삭제가 가능하고, 퓨즈 단선 및 진공펌프 및 진공스위치의 작동 불능으로 인한 차량의 안정성에 악영향을 주는 요인을 제거할 수 있다.By operating the brake booster 13 without consuming additional power by using the negative pressure generated by the air blower 172 according to the present invention, it is possible to eliminate the existing vacuum pump and the vacuum switch, It is possible to eliminate a factor adversely affecting the stability of the vehicle due to the inability of the vacuum switch to operate.

이상에서는 본 발명을 특정의 바람직한 실시예에 대하여 도시하고 설명하였으나, 본 발명은 이러한 실시예에 한정되지 않으며, 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 특허청구범위에서 청구하는 본 발명의 기술적 사상을 벗어나지 않는 범위내에서 실시할 수 있는 다양한 형태의 실시예들을 모두 포함한다.While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, And all of the various forms of embodiments that can be practiced without departing from the technical spirit.

도 1은 종래의 연료전지차량용 제동장치의 구성을 나타내는 구성도,BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a configuration diagram showing a configuration of a conventional braking device for a fuel cell vehicle;

도 2는 본 발명에 따른 연료전지차량용 제동장치의 구성을 나타내는 구성도이다.2 is a configuration diagram showing the configuration of a braking device for a fuel cell vehicle according to the present invention.

<도면의 주요부분에 대한 부호의 설명>Description of the Related Art

10 : 휠디스크 11 : 브레이크 패드10: Wheel disk 11: Brake pad

12 : 마스터 실린더 13 : 브레이크 부스터12: master cylinder 13: brake booster

14 : 브레이크 페달 15 : 연료전지스택14: Brake pedal 15: Fuel cell stack

16 : 수소공급장치 161 : 수소탱크16: hydrogen supply device 161: hydrogen tank

162 : 수소블로워 17 : 공기공급장치162: hydrogen blower 17: air supply device

171 : 공기필터 172 : 에어블로워171: Air filter 172: Air blower

173 : 가습기 18 : 열/물 관리계173: Humidifier 18: Heat / water management system

181 : 워터펌프 182 : 서머스탯181: Water pump 182: Thermostat

183 : 라디에이터 184 : COD 통합히터183: Radiator 184: COD integrated heater

19 : 부압라인 20 : 릴리프 밸브19: negative pressure line 20: relief valve

Claims (3)

연료전지차량용 제동장치에 있어서,A braking device for a fuel cell vehicle, 대기압과 부압의 차이를 이용하여 마스터 실린더의 피스톤을 가압하는 브레이크 부스터;A brake booster for pressing the piston of the master cylinder using the difference between the atmospheric pressure and the negative pressure; 상기 브레이크 부스터와 연결되어 부압을 공급하며 연료전지 시스템 작동 시 지속적으로 부압을 발생시키는 에어블로워;An air blower connected to the brake booster to supply a negative pressure and continuously generate a negative pressure when the fuel cell system operates; 를 포함하고, 상기 브레이크 부스터는 에어블로워에서 발생된 부압으로 작동하며, Wherein the brake booster operates with a negative pressure generated in the air blower, 상기 브레이크 부스터는 에어블로워의 입구단과 연통되도록 설치된 부압라인과, 상기 부압라인의 압력을 일정하게 유지시켜 주도록 부압라인에 설치되고 부압라인의 압력이 기준압력 보다 작은 경우에 열리는 릴리프 밸브를 포함하고, Wherein the brake booster includes a negative pressure line provided so as to communicate with the inlet end of the air blower and a relief valve provided in the negative pressure line to keep the pressure of the negative pressure line constant and opened when the pressure of the negative pressure line is smaller than the reference pressure, 상기 부압라인에 설치된 압력센서와, 상기 압력센서로부터 감지신호를 입력받아 릴리프밸브의 작동을 제어하는 제어부를 더 포함하는 것을 특징으로 하는 연료전지차량용 제동장치.A pressure sensor installed in the negative pressure line, and a control unit receiving a sensing signal from the pressure sensor and controlling operation of the relief valve. 삭제delete 삭제delete
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Citations (4)

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Publication number Priority date Publication date Assignee Title
JP2001341545A (en) 2000-05-31 2001-12-11 Honda Motor Co Ltd Fuel cell powered electric vehicle
KR20020042941A (en) * 2000-12-01 2002-06-08 이계안 A break booster pressure making device
KR20040003573A (en) * 2002-07-03 2004-01-13 현대자동차주식회사 Device and its control method for supply air of fuel cell system for automobile
JP2007122926A (en) * 2005-10-25 2007-05-17 Daihatsu Motor Co Ltd Fuel cell vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001341545A (en) 2000-05-31 2001-12-11 Honda Motor Co Ltd Fuel cell powered electric vehicle
KR20020042941A (en) * 2000-12-01 2002-06-08 이계안 A break booster pressure making device
KR20040003573A (en) * 2002-07-03 2004-01-13 현대자동차주식회사 Device and its control method for supply air of fuel cell system for automobile
JP2007122926A (en) * 2005-10-25 2007-05-17 Daihatsu Motor Co Ltd Fuel cell vehicle

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