KR20030060296A - leveling system for air suspension vehicles - Google Patents
leveling system for air suspension vehicles Download PDFInfo
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- KR20030060296A KR20030060296A KR1020020000924A KR20020000924A KR20030060296A KR 20030060296 A KR20030060296 A KR 20030060296A KR 1020020000924 A KR1020020000924 A KR 1020020000924A KR 20020000924 A KR20020000924 A KR 20020000924A KR 20030060296 A KR20030060296 A KR 20030060296A
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- South Korea
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- air
- leveling
- leveling valve
- magnetic force
- control unit
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/052—Pneumatic spring characteristics
- B60G17/0523—Regulating distributors or valves for pneumatic springs
- B60G17/0525—Height adjusting or levelling valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/018—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/019—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the type of sensor or the arrangement thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/10—Type of spring
- B60G2202/15—Fluid spring
- B60G2202/152—Pneumatic spring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
- B60G2204/43—Fittings, brackets or knuckles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/012—Hollow or tubular elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/20—Spring action or springs
- B60G2500/202—Height or leveling valve for air-springs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2600/00—Indexing codes relating to particular elements, systems or processes used on suspension systems or suspension control systems
- B60G2600/22—Magnetic elements
- B60G2600/26—Electromagnets; Solenoids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
- B60G2800/90—System Controller type
- B60G2800/925—Airbag deployment systems
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
Description
본 발명은 에어 서스펜션 차량의 레벨링 시스템에 관한 것으로, 특히 에어스프링과 레벨링밸브 및 차고에 따라 상기 레벨링밸브의 작동을 제어하는 기구가 일체화된 에어 서스펜션 차량의 레벨링 시스템에 관한 것이다.The present invention relates to a leveling system of an air suspension vehicle, and more particularly, to a leveling system of an air suspension vehicle incorporating an air spring, a leveling valve and a mechanism for controlling the operation of the leveling valve in accordance with a garage.
주지된 바와 같이 에어 서스펜션은 에어 스프링을 사용하여 차체의 하중을 지지하고 노면으로부터의 충격 및 진동의 전달을 흡수하는 것으로서, 하중의 증감에 관계없이 차고를 항상 일정하게 유지하고, 차량 전후좌우의 기울어짐을 방지하며, 하중의 증감에 따라 스프링 정수를 자동으로 변화시켜 항상 최적의 승차감이 얻어질 수 있도록 레벨링시스템을 구비한다.As is well known, the air suspension uses air springs to support the load of the vehicle body and absorbs the transmission of shock and vibration from the road surface, and keeps the garage constant at all times regardless of the increase or decrease of the load. It is equipped with a leveling system to prevent the load and to automatically change the spring constant according to the increase or decrease of the load so that the optimum riding comfort is always obtained.
레벨링시스템은 에어탱크로부터 에어스프링으로 연결된 공압관로 중에 쓰리웨이밸브인 레벨링밸브를 설치하고, 이 레벨링밸브를 차고에 따라 작동시킴으로써 상기 에어스프링으로 압축공기를 공급하거나 또는 배출시킬 수 있도록 되어 있는데, 레벨링밸브를 차고에 따라 작동시키기 위해서는 주로 수 개의 수평레버와 수직레버로 이루어진 레버기구를 레벨링밸브와 액슬에 연결설치하여 액슬의 승하강을 기구적으로 감지하고, 이에 따른 레버기구의 작동에 의하여 상기 레벨링밸브의 작동을 제어하는 기계적 방식을 사용하였다.The leveling system installs a three-way valve leveling valve in a pneumatic pipe connected from the air tank to the air spring, and operates the leveling valve according to the garage so that the compressed air can be supplied to or discharged from the air spring. In order to operate the valve according to the garage, a lever mechanism consisting mainly of several horizontal levers and vertical levers is connected to the leveling valve and the axle to mechanically sense the ascending and descending of the axle, and thus the leveling by the operation of the lever mechanism. A mechanical scheme was used to control the operation of the valve.
또한, 도 1에 도시된 바와 같이, 에어스프링(10)의 내부에 거리감지센서(40)를 설치하여, 이 거리감지센서(40)에서 측정되는 정보에 의해 프레임(20)과액슬(30)간의 거리변화를 인지한 제어유니트(50)로 하여금 솔레노이드 형식의 쓰리웨이밸브인 레벨링밸브(60)를 작동제어케 함으로써 에어스프링(10)으로 에어탱크의 압축공기를 공급하거나 에어스프링(10) 내부의 공기를 외부로 배출하여 레벨링작용이 이루어지도록 하는 전자제어방식을 사용하기도 하였다.In addition, as shown in Figure 1, by installing the distance sensor 40 in the air spring 10, the frame 20 and the axle 30 by the information measured by the distance sensor 40 The control unit 50 that recognizes the change in the distance between the two to operate the leveling valve 60, which is a three-way valve of the solenoid type to supply the compressed air of the air tank to the air spring (10) or inside the air spring (10) An electronic control method was used to discharge the air to the outside to achieve leveling action.
그런데, 상기 레벨링 시스템이 설치되는 공간은 상기 에어스프링 뿐만 아니라, 현가를 구성하는 여러 부품 즉, 쇽업소버, 스태빌라이저바, 레디어스로드, 레터럴로드 등이 복잡하게 설치되는 공간으로서 기계적 방식을 적용할 경우 부품간에 간섭을 피하여 레버기구와 레벨링밸브의 설치공간을 확보하기가 용이하지 않고, 전자제어방식의 경우에도 제어유니트(50)와 레벨링밸브(60)의 설치공간을 확보하기가 용이하지 않으므로 설계 자유도가 제한되며, 장착시에도 조립이 용이하지 않은 단점이 있었다.However, the space in which the leveling system is installed is a space in which not only the air spring but also various components constituting the suspension, that is, a shock absorber, a stabilizer bar, a radial rod, a lateral rod, etc. are complicatedly installed. In this case, it is not easy to secure the installation space of the lever mechanism and the leveling valve by avoiding interference between components, and in the case of the electronic control method, it is not easy to secure the installation space of the control unit 50 and the leveling valve 60. The degree of freedom is limited, there is a disadvantage that the assembly is not easy even when mounted.
그리고, 기계적 방식에서 상기 레버기구들을 이루는 레버들이 일정한 길이를 가지고 있기 때문에 차종에 따라 프레임과 액슬의 거리가 변화할때는 장치를 공용할 수 없으며, 최초 설치시 상기 에어스프링이 상기 레벨링밸브가 에어스프링으로 공기를 공급하지도 에어스프링으로부터 공기를 배출하지도 않는 상태에 있도록 상기 레버기구의 최초위치를 조정해 주어야 하는 단점도 있었다.In addition, since the levers forming the lever mechanisms have a certain length in a mechanical manner, the apparatus cannot be shared when the distance between the frame and the axle varies depending on the vehicle type. The air spring is connected to the air spring when the leveling valve is first installed. There was also a disadvantage that the initial position of the lever mechanism had to be adjusted so as not to supply air or to discharge air from the air spring.
또한, 상기 전자제어방식에서는 거리감지센서(40)의 가격이 고가이고, 그 내구성이 기계적 방식에 비해서 떨어진다는 문제점이 있었다.In addition, the electronic control method has a problem that the price of the distance sensor 40 is expensive, and its durability is inferior to that of the mechanical method.
이에 본 발명은 상기와 같은 단점들을 해소하기 위해 안출된 것으로, 에어스프링과 레벨링밸브 및 차고를 감지하고 이에 따라 상기 레벨링밸브의 작동을 제어하기 위한 부품들 즉, 기계적 방식에서 레버기구와 전자제어방식에서 거리감지센서 및 제어유니트의 역할을 담당하는 부분 및 레벨링밸브를 모두 패키지화하여 주변 부품들과의 간섭을 최소화함으로써 현가장치의 설계자유도를 향상시키고, 설치작업이 용이해지며, 차종에 상관없이 공용할 수 있음은 물론, 설치시 최초위치의 조정작업이 필요없도록 된 에어 서스펜션 차량의 레벨링 시스템을 제공함에 그 목적이 있다.Accordingly, the present invention has been made to solve the above disadvantages, components for sensing the air spring and the leveling valve and the garage and thus controlling the operation of the leveling valve, that is, the mechanical mechanism and lever mechanism in electronic All the parts and leveling valves, which play the role of distance sensor and control unit, are packaged to minimize interference with peripheral parts, improving design freedom of suspension system, making installation easier, and making common use regardless of vehicle type. It is, of course, an object of the present invention to provide a leveling system for an air suspension vehicle, which eliminates the need for adjustment of the initial position during installation.
도 1은 종래 에어 서스펜션 차량의 레벨링 시스템을 도시한 도면,1 is a view showing a leveling system of a conventional air suspension vehicle,
도 2는 본 발명에 따른 에어 서스펜션 차량의 레벨링 시스템을 도시한 도면이다.2 is a diagram illustrating a leveling system of an air suspension vehicle according to the present invention.
*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *
10 : 에어스프링,11 : 에어백,10: air spring, 11: air bag,
12 : 어퍼브라켓,13 : 로워브라켓,12: upper bracket, 13: lower bracket,
20 : 프레임,30 : 액슬,20: frame, 30: axle,
70 : 차고감지기구,71 : 마운팅브라켓,70: garage detection mechanism, 71: mounting bracket,
72 : 핀,73 : 회동원판,72: pin, 73: rotating disc,
74 : 스트링,75 : 인장스프링,74: string, 75: tension spring,
76 : 자석,77 : 제 1자력감지센서,76: magnet, 77: the first magnetic sensor,
78 : 제 2자력감지센서,80 : 레벨링밸브,78: second magnetic sensor, 80: leveling valve,
81 : 유입관,82 : 공급관,81: inlet pipe, 82: supply pipe,
83 : 배출관,90 : 제어유니트.83: discharge pipe, 90: control unit.
상기와 같은 목적을 달성하기 위한 본 발명은, 프레임과 액슬 사이에 장착된 에어스프링의 에어백 내부에 차고의 변화를 감지하는 차고감지기구가 설치되고, 상기 에어스프링의 로워브라켓 내부에 에어백으로 에어탱크의 압축공기를 공급하거나 에어백 내부의 공기를 외부로 배출하는 레벨링밸브 및 이 레벨링밸브를 상기 차고감지기구로부터 전달되는 신호에 따라 작동시키는 제어유니트가 내장되는 구조로 이루어진다.In order to achieve the above object, the present invention, a garage detecting mechanism for detecting a change in the garage is installed in the airbag of the air spring mounted between the frame and the axle, the air tank inside the lower bracket of the air spring as an air tank The leveling valve for supplying compressed air or to discharge the air inside the air bag to the outside and the control unit for operating the leveling valve in response to a signal transmitted from the garage detection mechanism is built.
이와 같이 레벨링을 위한 부품들이 모두 에어스프링의 내부에 설치되어 패키지화됨으로써 설치공간의 확보가 용이하고, 주변부품과의 간섭이 적어 설치작업이 용이하며, 에어스프링 제작시 차고감지기구의 초기위치가 모두 조정되어 있으므로 현가 조립라인에서 종래의 레버기구와 같이 초기위치를 조정할 필요가 없게 된다.As all the parts for leveling are installed inside the air springs and packaged, it is easy to secure the installation space, and the installation work is easy because there is little interference with the peripheral parts. Since it is adjusted, it is not necessary to adjust the initial position like the conventional lever mechanism in the suspension assembly line.
이하, 본 발명을 첨부된 예시도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.
도 2는 본 발명에 따른 에어 서스펜션 차량의 레벨링 시스템을 도시한 도면으로서, 본 발명은 차고감지기구(70)와, 레벨링밸브(80) 및 상기 차고감지기구(70)로부터 입력된 차고정보에 따라 레벨링밸브(50)의 작동을 제어하는 제어유니트(90)가 에어스프링(10)의 내부에 설치되는 것을 특징으로 한다.2 is a view showing a leveling system of an air suspension vehicle according to the present invention, the present invention according to the garage detection mechanism 70, the leveling valve 80 and the garage information input from the garage detection mechanism 70 The control unit 90 for controlling the operation of the leveling valve 50 is characterized in that it is installed inside the air spring (10).
에어스프링(10)은 일반적으로 공기가 주입되는 중앙의 에어백(11)과, 에어스프링(10)을 프레임(20)과 액슬(30) 사이에 장착하기 위해 상기 에어백(11)의 상하에 각각 설치된 어퍼브라켓(12)과 로워브라켓(13)을 포함하여 이루어지는데, 상기 차고감지기구(70)는 에어백(11)의 내부에 설치되고, 상기 레벨링밸브(80)와 제어유니트(90)는 로워브라켓(13)의 내부에 설치된다.The air spring 10 is generally installed above and below the air bag 11 in order to mount the air bag 11 in the center where air is injected and the air spring 10 between the frame 20 and the axle 30. It comprises an upper bracket 12 and a lower bracket 13, the garage detection mechanism 70 is installed inside the air bag 11, the leveling valve 80 and the control unit 90 is a lower bracket It is installed in the inside of (13).
상기 차고감지기구(70)는 에어스프링(10)의 어퍼브라켓(12) 하면에 마운팅브라켓(71)이 장착되고, 이 마운팅브라켓(71)에 핀(72)을 매개로 회동원판(73)이 회동가능하게 고정되며, 이 회동원판(73)의 외주면에는 홈이 형성되어 있어 이 홈에 삽입되는 상태로 회동원판(73)의 상면에 스트링(string ; 74)이 감겨지고, 이 스트링의 한쪽 단부는 상기 에어스프링(10)의 로워브라켓(13)에 직접 고정되며, 다른 한쪽 단부는 인장스프링(75)을 매개로 로워브라켓(13)에 고정되는 구조로 이루어진다.The garage detecting mechanism 70 has a mounting bracket 71 mounted on the lower surface of the upper bracket 12 of the air spring 10, and the pivoting plate 73 is connected to the mounting bracket 71 via a pin 72. It is fixed so as to be rotatable, and a groove is formed in the outer circumferential surface of the rotation disk 73 so that a string 74 is wound on the upper surface of the rotation disk 73 in a state of being inserted into the groove. Is directly fixed to the lower bracket 13 of the air spring 10, the other end is made of a structure fixed to the lower bracket 13 via the tension spring (75).
또한, 상기 마운팅브라켓(71)의 내측면에는 자석(76)이 부착되어 있으며, 마운팅브라켓(71)을 기준으로 하여 상기 회동원판(73)의 좌우측부에는 각각 제 1자력감지센서(77)와 제 2자력감지센서(78)가 설치되고, 이 자력감지센서(77,78)들은 전선으로 상기 로워브라켓(13)의 내부에 설치된 제어유니트(90)에 연결된다.In addition, a magnet 76 is attached to the inner surface of the mounting bracket 71, and the first magnetic force sensor 77 and the left and right sides of the rotation disc 73 based on the mounting bracket 71, respectively. The second magnetic force sensor 78 is installed, and the magnetic force sensors 77 and 78 are connected to the control unit 90 installed inside the lower bracket 13 by an electric wire.
상기 레벨링밸브(80)는 상기 제어유니트(90)로부터 전달되는 전압신호에 의해 작동되는 솔레노이드 타입의 쓰리웨이밸브로서, 상기 로워브라켓(13)의 내부에 설치되며, 에어탱크에 연결된 유입관(81)과 상기 로워브라켓(13)의 상면을 관통하여 에어백(11) 내부로 연통되는 공급관(82)과 로워브라켓(13)의 측면을 관통하여 외부로 연통되는 배출관(83)을 갖춘다.The leveling valve 80 is a solenoid type three-way valve operated by a voltage signal transmitted from the control unit 90, which is installed inside the lower bracket 13 and is connected to an air tank. And a supply pipe 82 which penetrates the upper surface of the lower bracket 13 and communicates with the inside of the airbag 11 and a discharge tube 83 which communicates with the outside through the side of the lower bracket 13.
상기 레벨링밸브(50)는 전술한 바와 같이 전압신호에 의해 작동되는 쓰리웨이밸브로서, 내부의 유로는 상기 제어유니트(90)로부터 전달되는 두 가지 전압신호에 의해 전환되며, 각각의 전압신호를 전달받는 2개의 솔레노이드에 의해 내부의 유로가 전환되는 쓰리웨이밸브는 관용되는 것이므로 상세구조에 대한 설명은 생략하며, 본 발명에서 레벨링밸브를 작동시키는 두 가지 전압신호는 상기 제 1자력감지센서(77) 및 제 2자력감지센서(78)로부터 발생된 전압신호에 의해 제어유니트(90)가 레벨링밸브의 두 솔레노이드에 각각 인가하는 배터리 전압이다.The leveling valve 50 is a three-way valve operated by a voltage signal as described above, the flow path therein is switched by two voltage signals transmitted from the control unit 90, and transfers each voltage signal Since the three-way valve is switched to the internal flow path by the two solenoids received, the detailed structure is omitted. In the present invention, the two voltage signals for operating the leveling valve are the first magnetic force sensor 77. And a battery voltage applied to the two solenoids of the leveling valve by the control unit 90 by the voltage signal generated from the second magnetic force sensor 78.
한편, 상기 에어스프링(10) 제작시에는 에어스프링(10)이 차량에 초기 장착될 때 레벨링밸브(50)가 닫힌 상태를 유지하여 에어스프링(10)이 기본 스프링압을 유지할 수 있도록 레벨링밸브에 작동전압이 인가되지 않게 하기 위하여 초기 장착후 자력감지센서(77,78)들의 사이 중앙에 자석(76)이 위치되는 상태로 회동원판(73)의 위치가 조정된다.Meanwhile, when the air spring 10 is manufactured, the leveling valve 50 is kept closed when the air spring 10 is initially installed in the vehicle so that the air spring 10 maintains the basic spring pressure. In order to prevent the operating voltage from being applied, the position of the rotation disk 73 is adjusted in a state where the magnet 76 is positioned at the center between the magnetic force sensors 77 and 78 after initial mounting.
이제 본 발명에 의한 레벨링 작용에 대해 설명한다.The leveling action according to the present invention will now be described.
하중이 증가하여 프레임(20)과 액슬(30)의 거리가 가까워질 경우, 인장스프링(75)에 의하여 스트링(74)은 항상 잡아당겨지고 있기 때문에 스트링(74)과의 마찰력에 의해 상기 회동원판(73)은 시계방향으로 회전한다.When the load increases and the distance between the frame 20 and the axle 30 approaches, the pivot disk is always pulled by the tension spring 75, so that the pivot disk is caused by friction with the string 74. 73 rotates clockwise.
회동원판(73)이 시계방향으로 회전하면 제 1자력감지센서(77)가 마운팅브라켓(71)의 자석(76)과 겹쳐짐으로써 제 1자력감지센서(77)는 자력을 감지하여 전압신호를 발생시키며, 이 전압신호는 제어유니트(90)로 전달된다.When the rotation disk 73 rotates in the clockwise direction, the first magnetic force sensor 77 overlaps with the magnet 76 of the mounting bracket 71, so that the first magnetic force sensor 77 detects the magnetic force to generate a voltage signal. This voltage signal is transmitted to the control unit 90.
제어유니트(90)는 제 1자력감지센서(77)로부터 전압신호가 입력되는 것에 의해 에어스프링(10)이 압축되었음을 인지하고 배터리의 전원을 상기 레벨링밸브(80)의 공기공급측 솔레노이드에 인가하여 이를 작동시킴으로써 에어탱크에 연결된 유입관과 에어백(11) 내부로 개방된 공급관(82)을 연결하는 유로가 형성되어, 에어백(11) 내부로 압축공기가 공급되어 에어백(11)의 내부 압력이 증가된다.The control unit 90 recognizes that the air spring 10 is compressed by inputting a voltage signal from the first magnetic force sensor 77, and applies the power of the battery to the air supply side solenoid of the leveling valve 80. By operation, a flow path is formed between the inlet pipe connected to the air tank and the supply pipe 82 opened into the air bag 11, and compressed air is supplied into the air bag 11 to increase the internal pressure of the air bag 11. .
따라서, 수축되었던 에어스프링(10)이 다시 팽창되어 액슬(30)에 대해 프레임(20)의 거리가 멀어짐으로써 차고 및 자세가 원상회복된다.Accordingly, the retracted air spring 10 is inflated again, and the distance of the frame 20 relative to the axle 30 increases, thereby restoring the garage and posture.
한편, 하중이 감소하여 프레임(20)과 액슬(30)의 거리가 멀어질 경우에는 스트링(74)의 한쪽단부가 로워브라켓(13)에 고정되어 있기 때문에 인장스프링(75)을 신장시키면서 스트링(74)이 당겨짐으로써 이 스트링(74)과의 마찰에 의해 상기 회동원판(73)은 반시계방향으로 회전한다.On the other hand, when the load decreases and the distance between the frame 20 and the axle 30 is increased, one end of the string 74 is fixed to the lower bracket 13, so that the string (75) is stretched while the tension spring 75 is extended. As the 74 is pulled out, the pivot disk 73 rotates counterclockwise by friction with the string 74.
이와 같이 회동원판(73)이 반시계방향으로 회전하면 제 2자력감지센서(78)가 상기 자석(76)과 겹쳐짐으로써 자력을 감지하여 전압신호를 발생시키고, 이 전압신호는 제어유니트(90)로 전달된다.When the rotation disk 73 rotates in the counterclockwise direction, the second magnetic force sensor 78 overlaps the magnet 76 to detect the magnetic force to generate a voltage signal, and the voltage signal is a control unit 90. Is delivered.
상기 제 2자력감지센서(78)로부터 전압신호를 전달받은 제어유니트(90)는 에어스프링(10)이 신장되었음을 인지하고 배터리의 전원을 상기 레벨링밸브(80)의 공기배출측 솔레노이드에 인가하여 이를 작동시킴으로써 상기 공급관(82)과 대기중으로 개방된 배출관(83)을 연결하는 유로가 형성되고, 이로써 에어백(11) 내부의 공기가 대기중으로 배출됨으로써 에어백(11) 내부의 압력은 다시 감소된다.The control unit 90 receiving the voltage signal from the second magnetic force sensor 78 recognizes that the air spring 10 is extended and applies the power of the battery to the air discharge side solenoid of the leveling valve 80. By operation, a flow path connecting the supply pipe 82 and the discharge pipe 83 opened to the air is formed, whereby the air inside the air bag 11 is discharged to the air, thereby reducing the pressure inside the air bag 11 again.
따라서, 신장되었던 에어스프링(11)이 하중에 의해 다시 압축되어 액슬(30)에 대한 프레임(20)의 거리가 가까워짐으로써 차고 및 자세가 원상회복된다.Accordingly, the stretched air spring 11 is compressed again by the load, and the distance of the frame 20 relative to the axle 30 is closer, so that the height and the posture are restored.
이상 설명한 바와 같이 본 발명에 따른 레벨링 시스템은 레벨링 시스템 본연의 역할을 충실히 수행하면서도 종래 레벨링 시스템의 문제점을 해소하였다.As described above, the leveling system according to the present invention solves the problems of the conventional leveling system while faithfully performing the role of the leveling system.
즉, 본 발명에 따른 레벨링 시스템에서는 레벨링밸브와, 차고의 변화를 감지하는 차고감지지구와, 이 차고감지기구에서 전달되는 신호에 따라 상기 레벨링밸브의 작동을 제어하는 제어유니트가 모두 에어스프링의 내부에 설치되어 패키지화됨으로써 설치공간의 확보(현가장치 설치공간내에서)가 매우 용이하여 에어 서스펜션의 설계 전체적인 측면에 있어서 그 자유도가 크게 향상된다.That is, in the leveling system according to the present invention, both the leveling valve, the garage support for sensing the change of the garage, and the control unit for controlling the operation of the leveling valve according to the signal transmitted from the garage sensing mechanism are all inside the air spring. By installing and packaged in the housing, it is very easy to secure the installation space (in the suspension installation space), and the degree of freedom in the overall design of the air suspension is greatly improved.
또한, 패키지화에 의해 취급이 용이하고, 장착시 종래 레버기구와 같이 주변의 현가부품과의 간섭을 크게 일으키지 않음으로써 장착작업이 용이해지는 장점이 있다.In addition, it is easy to handle by packaging, and the mounting operation is facilitated by not causing much interference with surrounding suspension parts as in the conventional lever mechanism.
또한, 종래 차고를 감지하기 위한 거리감지센서에 비하여 본 발명에 적용된 자력감지센서 및 이 자력감지센서가 설치되는 차고감지기구는 그 구성비용이 저렴한 장점이 있으며, 내구성능도 거리감지센서에 비하여 뛰어나다.In addition, compared to the distance sensor for detecting a conventional garage, the magnetic force sensor applied to the present invention and the garage detecting mechanism in which the magnetic force sensor is installed have the advantages of low configuration cost, and durability is also superior to the distance sensor. .
또한, 에어스프링 제작시 차고감지기구의 초기위치가 모두 조정되어 있으므로 현가 조립라인에서 종래의 레버기구와 같이 초기 장착위치를 조정해야 하는 불편함이 해소되며, 동일한 용량의 에어스프링을 채용하는 차량에 있어서는 차종에 따른 구별 없이 장치를 공용할 수 있게 되는 효과가 있다.In addition, since the initial positions of the garage detection mechanisms are all adjusted when manufacturing the air springs, the inconvenience of having to adjust the initial mounting positions as in the conventional lever mechanism in the suspension assembly line is eliminated. In this case, there is an effect that the device can be shared without distinguishing according to the vehicle type.
Claims (3)
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| KR10-2002-0000924A KR100471820B1 (en) | 2002-01-08 | 2002-01-08 | leveling system for air suspension vehicles |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100471833B1 (en) * | 2002-04-23 | 2005-03-08 | 현대자동차주식회사 | A level control device for air suspension of a vehicle |
| KR102117944B1 (en) * | 2018-12-05 | 2020-06-02 | 이화령 | Device of height sensor for vehicle |
| KR102117942B1 (en) * | 2018-12-05 | 2020-06-02 | 이화령 | Air suspension system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58161609A (en) * | 1982-03-18 | 1983-09-26 | Fuji Heavy Ind Ltd | Car height adjusting device of car air suspension |
| JPS5975813A (en) * | 1982-10-21 | 1984-04-28 | Fuji Heavy Ind Ltd | Air suspension device for automobile |
| JPH10274269A (en) * | 1997-03-27 | 1998-10-13 | Denso Corp | Air suspension |
| KR19990036282U (en) * | 1998-02-18 | 1999-09-27 | 정몽규 | Body height adjuster |
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2002
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100471833B1 (en) * | 2002-04-23 | 2005-03-08 | 현대자동차주식회사 | A level control device for air suspension of a vehicle |
| KR102117944B1 (en) * | 2018-12-05 | 2020-06-02 | 이화령 | Device of height sensor for vehicle |
| KR102117942B1 (en) * | 2018-12-05 | 2020-06-02 | 이화령 | Air suspension system |
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