KR100863641B1 - Steering control unit of automotive suspension using leaf spring geometry - Google Patents

Steering control unit of automotive suspension using leaf spring geometry Download PDF

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KR100863641B1
KR100863641B1 KR1020060100520A KR20060100520A KR100863641B1 KR 100863641 B1 KR100863641 B1 KR 100863641B1 KR 1020060100520 A KR1020060100520 A KR 1020060100520A KR 20060100520 A KR20060100520 A KR 20060100520A KR 100863641 B1 KR100863641 B1 KR 100863641B1
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South Korea
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leaf spring
vehicle
steering
eye portion
geometry
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KR1020060100520A
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Korean (ko)
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KR20080034371A (en
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김상윤
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현대자동차주식회사
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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
    • B60G17/016—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 their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/02—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only
    • 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
    • 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
    • B60G2202/40—Type of actuator
    • B60G2202/43—Mechanical actuator
    • 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
    • B60G2204/419—Gears
    • B60G2204/4192—Gears rack and pinion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/05—Attitude
    • B60G2400/052—Angular rate
    • 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
    • B60G2800/24—Steering, cornering
    • B60G2800/246—Understeer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2300/00—Purposes or special features of road vehicle drive control systems
    • B60Y2300/02—Control of vehicle driving stability
    • B60Y2300/022—Stability in turns or during cornering
    • B60Y2300/0227—Stability in turns or during cornering related to under-steering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
    • F16H19/02—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion
    • F16H19/04—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion comprising a rack

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

본 발명은 판스프링 지오메트리를 이용한 자동차용 현가장치의 조종특성 제어장치에 관한 것으로서, 자동차용 현가장치의 스프링 궤적에 따라 발생하는 조향 특성을 이용하여 판스프링의 아이(eye)부의 위치를 능동적으로 변화시켜 운전자의 운전 특성에 따라 자동차의 조종특성을 변화시킴으로써, 선회시의 안정성과 핸들링 성능을 극대화시킬 수 있는 판스프링 지오메트리를 이용한 자동차용 현가장치의 조종특성 제어장치에 관한 것이다. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering characteristic control apparatus for an automobile suspension using leaf spring geometry, and actively changes the position of an eye portion of a leaf spring by using steering characteristics generated according to a spring trajectory of an automobile suspension. By controlling the driving characteristics of the vehicle according to the driver's driving characteristics, the steering characteristics control device of the vehicle suspension using the leaf spring geometry that can maximize the stability and handling performance when turning.

이를 위하여, 본 발명은 스티어링 휠의 각속도에 따라 판스프링의 지오메트리를 변경시키기 위하여 전방측 아이부의 위치를 변경하기 위한 구조와 장치를 구현하는바, 좌,우측 판스프링 어셈블리의 전방측 아이부의 상하 위치를 변경할 수 있도록 상기 좌,우측의 전방측 아이부에 구동축을 편심되게 연결하고, 상기 구동축이 편심 회전 가능하도록 하는 구동부를 연결한 판스프링 지오메트리를 이용한 자동차용 현가장치의 조종특성 제어장치를 제공하고자 한다.To this end, the present invention implements a structure and apparatus for changing the position of the front eye portion in order to change the geometry of the leaf spring according to the angular velocity of the steering wheel, the upper and lower positions of the front eye portion of the left and right leaf spring assembly In order to provide a steering characteristic control device for a vehicle suspension using the leaf spring geometry connected to the drive shaft eccentrically connected to the front and rear eye parts of the left and right, and the drive to allow the drive shaft eccentric rotation do.

자동차, 현가장치, 판스프링 지오메트리, 조종특성 Automobile, suspension, leaf spring geometry, steering characteristics

Description

판스프링 지오메트리를 이용한 자동차용 현가장치의 조종특성 제어장치{Steering control unit of automotive suspension using leaf spring geometry}Steering control unit of automotive suspension using leaf spring geometry}

도 1은 본 발명에 따른 판스프링 지오메트리를 이용한 자동차용 현가장치의 조종특성 제어장치에 있어서, 판스프링 어셈블리의 아이부에 연결된 구동축의 장착상태를 나타내는 장착도,1 is a mounting view showing the mounting state of the drive shaft connected to the eye portion of the leaf spring assembly in the steering characteristic control apparatus for the vehicle suspension using the leaf spring geometry according to the present invention,

도 2는 본 발명에 따른 아이부에 연결된 구동축을 회전 작동시키는 작동부의 장착위치를 나타내는 도면,2 is a view showing the mounting position of the operating unit for rotating the drive shaft connected to the eye unit according to the present invention,

도 3은 본 발명에 따른 판스프링 어셈블리의 아이부의 작동상태를 나타내는 작동도,3 is an operation view showing the operating state of the eye portion of the leaf spring assembly according to the present invention,

도 4는 본 발명에 따른 아이부의 작동에 따른 판스프링 어셈블리의 작동상태를 나타내는 작동도,Figure 4 is an operation showing the operating state of the leaf spring assembly according to the operation of the eye portion according to the present invention,

도 5는 종래의 자동차가 좌회전시 현가장치의 상태를 개략적으로 나타내는 평면도이다. 5 is a plan view schematically illustrating a state of a suspension device when a conventional vehicle is turned left.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

1 : 판스프링 3 : 아이부1: leaf spring 3: Ibu

5 : 스프링핀 10 : 감지부 5: spring pin 10: sensing unit

11 : 회전각속도 검출센서 20 : 구동부 11: rotation angle velocity detection sensor 20: drive unit

21 : 원판 22 : 구동축 21: disc 22: drive shaft

30 : 제어부 31 : ECU30 control unit 31 ECU

본 발명은 판스프링 지오메트리를 이용한 자동차용 현가장치의 조종특성 제어장치에 관한 것으로서, 더욱 상세하게는 자동차용 현가장치의 스프링 궤적에 따라 발생하는 조향 특성을 이용하여 판스프링의 아이(eye)부의 위치를 능동적으로 변화시켜 운전자의 운전 특성에 따라 자동차의 조종특성을 변화시킬 수 있는 판스프링 지오메트리를 이용한 자동차용 현가장치의 조종특성 제어장치에 관한 것이다. The present invention relates to a steering characteristic control device for a vehicle suspension using the leaf spring geometry, and more particularly, the position of the eye portion of the leaf spring by using the steering characteristics generated by the spring trajectory of the vehicle suspension The present invention relates to a steering characteristic control device for a vehicle suspension system using a leaf spring geometry that can change the steering characteristics of a vehicle according to the driver's driving characteristics by actively changing the driving characteristics.

일반적으로 자동차의 현가장치에서 섀시 스프링은 차체와 차륜 사이에 설치되어 주행중 노면으로부터 전달되는 충격과 타이어의 진동을 흡수하여 차체에 전달시키지 않도록 함으로써 승차감을 좋게 하는 부품인 바, 이러한 섀시 스프링은 크게 판스프링과 코일스프링 및 에어스프링 등으로 구분될 수 있는데, 특히 대형 화물차의 경우에는 가격과 정비 비용이 저렴하면서 내구성은 우수하고 하중에 잘 견딜 수 있도록 길이가 각기 다른 다수개의 띠모양으로 이루어진 스프링강을 구부려서 포갠 형태의 판스프링(Leaf Spring)을 주로 사용하고 있는 실정이다.In general, in the suspension system of a vehicle, the chassis spring is installed between the vehicle body and the wheels to absorb the shock transmitted from the road surface and the vibration of the tire so as not to be transmitted to the vehicle body. Springs, coil springs and air springs can be categorized into. For large trucks, spring steel, which is made up of a number of bands of different lengths with different lengths, can be used to provide excellent durability and to withstand loads. It is a situation that mainly uses a leaf spring (bend) folded spring.

한편, 상기와 같은 판스프링(1)의 중앙은 액슬(9)과 U-볼트등의 체결수단을 매개로 고정되어 있는 것이 일반적이다.On the other hand, it is common that the center of the leaf spring (1) as described above is fixed through the fastening means such as the axle (9) and the U-bolt.

그리고, 상기와 같은 판스프링(1)을 장착한 자동차가 직진 주행시에는 양측 전륜을 지지하고 있는 액슬(9)이 수평을 유지하면서 좌,우측 판스프링(1)은 각각 액슬(9)에 대하여 수직한 방향으로 배치되어 있다. When the vehicle equipped with the leaf springs 1 as described above travels straight, the left and right leaf springs 1 are perpendicular to the axle 9 while the axles 9 supporting both front wheels are horizontal. It is arranged in one direction.

이때, 상기 좌,우측 판스프링(1)의 후미를 각기 자동차의 차체에 장착시키도록 된 좌,우측 섀클(shackle)(7)은 동일한 상태로 유지된다.At this time, the left and right shackles 7 mounted to the rear of the left and right leaf springs 1 in the vehicle body of the vehicle are maintained in the same state.

그런데, 주행중 차량이 좌회전을 하게 되면, 도 5에 도시된 바와 같이, 상기 전륜이 좌측을 향하게 되는 바, 이때 차체는 선회 반대방향으로 원심력을 받아 기울어지게 되는데, 즉 선회방향의 좌측차체는 상방향으로 들려지는 리바운드(Rebound)되고, 선회 반대방향의 우측차체는 하방향으로 가라앉는 범프(Bump)가 된다.However, when the vehicle makes a left turn while driving, as shown in FIG. 5, the front wheels are directed to the left side, and the vehicle body is inclined by the centrifugal force in the opposite direction of the turning, that is, the left vehicle body in the turning direction is upward. The vehicle is rebounded and the vehicle body on the right side of the turn opposite direction becomes a sinking bump.

이에 따라, 상기 우측 판스프링(1)은 범프되는 차체의 하중을 받아 상하방향으로 많이 변형되는 바, 이때 우측 판스프링(1)의 변형은 판스프링의 후미를 차체에 고정시키는 우측 섀클(7)이 흡수하여 후방으로 밀려나면서 우측 판스프링(1)의 전체길이를 후방으로 신장되게 한다.Accordingly, the right leaf spring 1 is deformed a lot in the vertical direction under the load of the bumped vehicle body, and the deformation of the right leaf spring 1 causes the right shackle 7 to fix the rear end of the leaf spring to the vehicle body. This absorbs and is pushed backward so that the entire length of the right leaf spring 1 is extended backward.

따라서 상기 우측 판스프링(1)의 중앙부위와 U-볼트등의 체결수단을 매개로 고정된 전륜측 액슬(9)은 우측부위가 후방으로 약간 선회 되는바, 이와 같이, 전륜을 장착하고 있는 전륜측 액슬(9)이 선회시 선회반대방향의 후방으로 약간 선회되면, 선회반경이 작아지는 오버스티어링(over steering) 현상을 유발하게 된다.Therefore, the front wheel side axle 9 fixed through the center portion of the right leaf spring 1 and the fastening means such as the U-bolt is slightly rotated to the rear of the right side bar, and thus, the front wheel on which the front wheel is mounted. If the side axle 9 swings slightly to the rear in the reverse direction of the turn when turning, it causes an over steering phenomenon in which the turn radius becomes smaller.

이와 반대로, 운전자가 좌측으로 선회시, 전륜이 반대의 궤적을 갖는다면 이 는 운전자의 의도와는 달리 더 회전을 하게 되므로 언더스티어링(under steering) 현상이 발생하게 된다. On the contrary, when the driver turns to the left side, if the front wheel has the opposite trajectory, the driver rotates more contrary to the driver's intention, thereby causing an under steering phenomenon.

그런데, 종래의 자동차용 현가장치는 스티어링 휠의 조향 특성을 이용하여 판스프링의 지오메트리를 변경할 수 없어 운전자의 운전 특성에 따라 자동차의 조종특성을 변화시킬 수 없게 되고, 궁극적으로는 자동차 선회시의 안정감을 상실하게 되는 문제점이 있다. However, the conventional vehicle suspension system cannot change the geometry of the leaf spring by using the steering characteristics of the steering wheel, so that the steering characteristics of the vehicle cannot be changed according to the driver's driving characteristics, and ultimately, a sense of stability when turning the vehicle. There is a problem that you lose.

따라서, 본 발명은 상기와 같은 문제점을 해결하기 위하여 발명한 것으로서, 자동차용 현가장치의 스프링 궤적에 따라 발생하는 조향 특성을 이용하여 판스프링의 아이(eye)부의 위치를 능동적으로 변화시켜 운전자의 운전 특성에 따라 자동차의 조종특성을 변화시킴으로써, 선회시의 안정성과 핸들링 성능을 극대화시킬 수 있는 판스프링 지오메트리를 이용한 자동차용 현가장치의 조종특성 제어장치를 제공하는데 그 목적이 있다.Therefore, the present invention is invented to solve the above problems, by using the steering characteristics generated by the spring trajectory of the vehicle suspension device to actively change the position of the eye portion of the leaf spring to drive the driver It is an object of the present invention to provide a steering characteristic control device for a vehicle suspension using leaf spring geometry that can maximize the stability and handling performance when turning by changing the steering characteristics of the vehicle.

상기와 같은 목적을 달성하기 위하여 본 발명은 스티어링 휠의 각속도의 변화를 감지하는 감지부(10)와;In order to achieve the above object, the present invention provides a detection unit for detecting a change in the angular velocity of the steering wheel;

판스프링 어셈블리의 좌,우측의 전방측 아이부(3)를 차체에 대해 상하방향으로 이동시키도록 하는 상기 좌,우측 차체에 장착된 구동부(20)와;A drive unit (20) mounted to the left and right vehicle bodies for moving the left and right front eye parts (3) of the leaf spring assembly upward and downward with respect to the vehicle body;

자동차의 선회시 운전자의 운전특성에 따라 자동차의 조종특성을 변화시킬 수 있도록 상기 구동부(20)에 제어신호를 보내는 제어부(30)를 포함하여 구성된 것을 특징으로 한다.It characterized in that it comprises a control unit 30 for sending a control signal to the drive unit 20 to change the steering characteristics of the vehicle according to the driving characteristics of the driver when turning the vehicle.

바람직한 구현예로서, 상기 구동부(20)는 상기 좌,우측의 전방측 아이부(3)에 편심된 한 쌍의 원판(21)이 장착되고, 상기 좌,우측의 전방측 아이부(3)의 중심부에 상기 전방측 아이부(3)의 스프링핀(5)을 편심 회전할 수 있도록 하는 구동축(22)이 서로 연결되어지되, 상기 구동축(22)에 형성된 피니언 기어와, 상기 피니언 기어에 치합하는 랙기어가 전후방향으로 작동되도록 하는 액츄에이터 수단으로 이루어진 것을 특징으로 한다.In a preferred embodiment, the drive unit 20 is equipped with a pair of discs 21 eccentrically mounted to the front and rear eye parts 3 on the left and right sides of the front and rear eye parts 3 on the left and right sides. Drive shaft 22 for eccentric rotation of the spring pin (5) of the front eye portion (3) in the center is connected to each other, the pinion gear formed on the drive shaft 22 and the pinion gear It characterized in that the rack gear is made of an actuator means for operating in the front and rear directions.

또한, 상기 제어부(30)는 자동차의 선회시 스티어링 휠의 회전각속도를 감지하는 회전각속도 검출센서(11)로부터 이의 회전각속도를 입력받아 상기 구동부(20)에 제어신호를 전송하는 ECU(31)인 것을 특징으로 한다. In addition, the control unit 30 is an ECU (31) for receiving a rotational angular velocity from the rotational angular velocity detection sensor (11) for detecting the rotational angular velocity of the steering wheel when the vehicle is turning and transmitting a control signal to the drive unit (20). It is characterized by.

이하, 첨부도면을 참조하여 본 발명의 구성에 대해 상세하게 설명하면 다음과 같다. Hereinafter, the configuration of the present invention with reference to the accompanying drawings in detail.

첨부한 도 1은 본 발명에 따른 판스프링 지오메트리를 이용한 자동차용 현가장치의 조종특성 제어장치에 있어서, 판스프링 어셈블리의 아이부에 연결된 구동축의 장착상태를 나타내는 장착도이고, 도 2는 본 발명에 따른 아이부에 연결된 구동축을 회전 작동시키는 작동부의 장착위치를 나타내는 도면이며, 도 3은 본 발명에 따른 판스프링 어셈블리의 아이부의 작동상태를 나타내는 작동도이다. 1 is a mounting view showing the mounting state of the drive shaft connected to the eye portion of the leaf spring assembly in the steering characteristic control apparatus for a vehicle using the leaf spring geometry according to the present invention, Figure 2 Figure 3 is a view showing the mounting position of the operating unit for rotating the drive shaft connected to the eye portion, Figure 3 is an operation diagram showing the operating state of the eye portion of the leaf spring assembly according to the present invention.

또한, 도 4는 본 발명에 따른 아이부의 작동에 따른 판스프링 어셈블리의 작 동상태를 나타내는 작동도이다. 4 is an operation diagram showing an operating state of the leaf spring assembly according to the operation of the eye portion according to the present invention.

본 발명은 스티어링 휠(미도시)의 각속도에 따라 판스프링(1)의 지오메트리를 변경시키기 위하여 전방측 아이(eye)부(3)의 위치를 변경하기 위한 구조와 장치를 구현하는바, 좌,우측 판스프링 어셈블리의 전방측 아이부(3)의 상하 위치를 변경할 수 있도록 상기 좌,우측의 전방측 아이부(3)에 구동축(22)을 편심되게 연결하고, 상기 구동축(22)이 편심 회전 가능하도록 하는 구동부(20)를 연결하는데 주안점이 있다.The present invention implements a structure and a device for changing the position of the front eye part 3 in order to change the geometry of the leaf spring 1 according to the angular velocity of the steering wheel (not shown). The drive shaft 22 is eccentrically connected to the left and right front eye parts 3 so that the up and down positions of the front eye parts 3 of the right leaf spring assembly can be changed, and the drive shaft 22 is eccentrically rotated. The main focus is on connecting the drive unit 20 to enable it.

상기 판스프링 어셈블리의 전방측 아이부(3)를 차체에 대해 전후 방향으로 이동시킴으로써, 도 4에 도시된 바와 같이, 전방측 아이부(3)가 상하 방향으로 이동하게 된다.By moving the front eye part 3 of the leaf spring assembly in the front-rear direction with respect to the vehicle body, as shown in FIG. 4, the front eye part 3 moves in the vertical direction.

이를 위하여, 도 1에 도시된 바와 같이, 상기 좌,우측의 전방측 아이부(3)에 편심된 한 쌍의 원판(21)이 장착되고, 상기 좌,우측의 전방측 아이부(3)의 중심부에 상기 전방측 아이부(3)의 스프링핀(5)을 편심 회전할 수 있도록 하는 구동축(22)이 서로 연결된다. To this end, as shown in FIG. 1, a pair of discs 21 eccentrically mounted on the left and right front eye parts 3 are mounted, and the left and right front eye parts 3 are mounted. Drive shafts 22 for eccentrically rotating the spring pin 5 of the front eye portion 3 are connected to each other at the center.

즉, 상기 전방측 아이부(3)가 기준선을 중심으로 편심 회전할 경우, 도 3에 도시된 바와 같이, 최고점과 최하점이 확보되는바, 이때의 구동축(22) 회전각도는 180°로 한정함이 바람직하다. That is, when the front eye part 3 is eccentrically rotated about the reference line, as shown in FIG. 3, the highest point and the lowest point are secured, and the rotation angle of the driving shaft 22 at this time is limited to 180 °. This is preferred.

또한, 상기 전방측 아이부(3)에 연결된 구동축(22)을 회전시키는 구동부(20)는 도 2에 도시된 바와 같이, 구동축(22)의 중심부에 장착하게 되는바, 상기 구동축(22)을 회전시키는 수단이라면 어떠한 구성으로 이루어지더라도 상관없다.In addition, the driving unit 20 for rotating the driving shaft 22 connected to the front eye portion 3 is mounted to the center of the driving shaft 22, as shown in Figure 2, the driving shaft 22 As long as it is a means to rotate, what kind of structure may be sufficient.

예를 들어, 상기 구동축(22)에 기어치가 형성된 피니언 기어가 구비되고, 상기 피니언 기어에 치합하는 랙기어가 전후방향으로 작동되도록 하는 액츄에이터 수단으로 이루어진 구성으로 이루어진 것이 바람직하다.For example, it is preferable that the pinion gear having gear teeth formed on the drive shaft 22 is provided, and the rack gear engaged with the pinion gear is made of an actuator means for operating in the front-back direction.

또는, 상기 액츄에이터 수단 사이에 랙,피니언 기어가 아닌, 다른 종류의 기어수단을 통해 작동되도록 하는 것도 무방하다.Alternatively, the actuator means may be operated by other types of gear means other than the rack and pinion gear.

이와 같이, 상기 구동부(20)는 그 구성이 한정되지 않으며, 상기 구동축(22)을 회전시키는 특성을 갖는 것이라면 어떠한 구성으로 이루어지더라도 무방하다. As such, the configuration of the driving unit 20 is not limited, and any configuration may be used as long as the driving unit 20 has a characteristic of rotating the driving shaft 22.

한편, 이러한 구동부(20)에 연결되어 차량의 선회시 좌,우측 판스프링 어셈블리의 전방측 아이부(3)가 상방 또는 하방으로 이동할 수 있도록 제어신호를 보내도록 설정된 제어부(30)가 구비되어 있다.On the other hand, the control unit 30 is connected to such a drive unit 20 is set to send a control signal so that the front eye portion 3 of the left and right leaf spring assembly can move upward or downward when the vehicle is turning. .

상기 제어부(30)는 운전자의 운전특성에 따라 자동차의 조종특성을 변화시킬 수 있도록 구현되는바, 제어부(30)는 스티어링 휠의 회전각속도를 감지하는 감지부(10), 즉 회전각속도 검출센서(11)로부터 스티어링 휠의 회전각속도를 입력받도록 된 ECU(31)로 이루어진바, 이 ECU(31)는 자동차의 선회시 그 회전각속도를 통해 상기 구동부(20)에 제어신호를 보내 그 회전각을 제어하게 된다. The control unit 30 is implemented to change the steering characteristics of the car according to the driver's driving characteristics, the control unit 30 is a sensing unit 10 for detecting the rotational angular velocity of the steering wheel, that is, the rotational angular velocity detection sensor ( 11, the ECU 31 is configured to receive the rotational angular velocity of the steering wheel. The ECU 31 controls the rotational angle by sending a control signal to the drive unit 20 through the rotational angular velocity during the turning of the vehicle. Done.

따라서, 주행중인 자동차가 좌측으로 선회할 때, 스티어링 휠의 각속도를 감지하여 오버스티어링 또는 언더스티어링을 구현하게 되는바, 이를 상기 감지부(10)인 회전각속도 검출센서(11)에서 검출하여 이를 ECU(31)로 입력하게 되고, 이 ECU(31)는 구동부(20)에 제어신호를 보내 액츄에이터 수단으로 하여금 구동축(22)을 순방향 또는 역방향으로 회전시켜 판스프링 어셈블리의 전방측 아이부(3)를 차 체에 대해 전후 방향으로 이동시킴으로써, 상방 또는 하방으로 편심 회전하도록 한다.Therefore, when the driving car turns to the left, the steering wheel detects the angular speed to implement oversteering or understeering, and this is detected by the rotational angular velocity detection sensor 11, which is the detection unit 10, and then the ECU. (31), the ECU (31) sends a control signal to the drive unit (20) to cause the actuator means to rotate the drive shaft (22) in the forward or reverse direction to move the front eye portion (3) of the leaf spring assembly. By moving in the front-rear direction with respect to the vehicle body, eccentric rotation is performed upward or downward.

즉, 상기 스티어링 휠의 각속도가 기준 설정값보다 빠를 경우, 상기 전방측 아이부(3)를 상방으로 작동시켜 언더스티어링 동작을 구현되도록 하고, 반대로 스티어링 휠의 각속도가 기준 설정값보다 느린 경우, 상기 전방측 아이부(3)를 하방으로 작동시켜 오버스티어링 동작을 구현되도록 하여 자동차의 선회 안정성을 향상시키게 된다.That is, when the angular speed of the steering wheel is faster than the reference setting value, the front eye unit 3 is operated upward to implement the understeering operation. On the contrary, when the angular speed of the steering wheel is slower than the reference setting value, By operating the front eye portion 3 downward to implement the oversteering operation to improve the turning stability of the vehicle.

그러나, 경주용 자동차의 경우, 이와 반대로 하여 빠른 각속도에서는 더욱 빠른 자동차의 선회를 구현하기 위하여 오버스티어링으로도 변경이 가능하다. However, in the case of a racing car, on the contrary, it can be changed to oversteering in order to implement a faster turning of the car at a higher angular speed.

이때에는 상기 회전각속도 검출센서(11)가 아닌, 운전자의 의지에 따라 스위치 등을 이용하여 수동으로 아이부(3)를 작동하도록 하는 구조로 된 것이 바람직하다.In this case, it is preferable that the rotational angular velocity detection sensor 11 is configured to manually operate the eye unit 3 using a switch or the like according to the driver's will.

그리고, 자동차의 선회가 완료되고, 직진 주행시에는 상기 ECU(31)가 스티어링 휠의 회전각을 감지하는 검출수단으로부터 이를 검출하여 구동부(20)에 역회전 신호를 보내게 되는데, 이에 따라 구동축(22)이 초기방향과 반대로 역방향으로 회전하여 원래의 위치로 복귀되도록 한다.Then, when the turning of the vehicle is completed and the vehicle travels straight, the ECU 31 detects this from the detection means for detecting the rotation angle of the steering wheel, and sends a reverse rotation signal to the driving unit 20. ) Is rotated in the opposite direction to the initial direction to return to the original position.

이와 같이, 본 발명은 주행중인 자동차가 선회시 판스프링(1)의 아이부(3)의 위치를 능동적으로 변화시켜 운전자의 운전 특성에 따라 자동차의 조종특성을 변화시킴으로써, 선회시의 안정성과 핸들링 성능을 극대화시킬 수 있는 새로운 자동차용 현가장치이다. As described above, the present invention actively changes the position of the eye portion 3 of the leaf spring 1 when the vehicle is being driven to change the steering characteristics of the vehicle according to the driver's driving characteristics, thereby ensuring stability and handling when turning. It is a new automotive suspension that can maximize performance.

이상에서 본 바와 같이, 본 발명에 따른 판스프링 지오메트리를 이용한 자동차용 현가장치의 조종특성 제어장치에 의하면, 자동차용 현가장치의 스프링 궤적에 따라 발생하는 조향 특성을 이용하여 판스프링의 아이(eye)부의 위치를 능동적으로 변화시켜 운전자의 운전 특성에 따라 자동차의 조종특성을 변화시킴으로써, 선회시의 안정성과 핸들링 성능을 향상시킬 수 있는 효과가 있다.As described above, according to the steering characteristic control apparatus of the vehicle suspension apparatus using the leaf spring geometry according to the present invention, the eye of the leaf spring using the steering characteristics generated by the spring trajectory of the vehicle suspension system By actively changing the negative position to change the steering characteristics of the car according to the driver's driving characteristics, there is an effect that can improve the stability and handling performance during turning.

Claims (4)

스티어링 휠의 각속도의 변화를 감지하는 감지부(10)와;A sensing unit 10 for detecting a change in the angular velocity of the steering wheel; 판스프링 어셈블리의 좌,우측의 전방측 아이부(3)를 차체에 대해 상하방향으로 이동시키도록 하는 상기 좌,우측 차체에 장착된 구동부(20)와;A drive unit (20) mounted to the left and right vehicle bodies for moving the left and right front eye parts (3) of the leaf spring assembly upward and downward with respect to the vehicle body; 자동차의 선회시 운전자의 운전특성에 따라 자동차의 조종특성을 변화시킬 수 있도록 상기 구동부(20)에 제어신호를 보내는 제어부(30)를 포함하여 구성되어지되, 상기 구동부(20)는 상기 좌,우측의 전방측 아이부(3)에 편심된 한 쌍의 원판(21)이 장착되고, 상기 좌,우측의 전방측 아이부(3)의 중심부에 상기 전방측 아이부(3)의 스프링핀(5)을 편심 회전할 수 있도록 하는 구동축(22)이 서로 연결되어지되, 상기 구동축(22)에 형성된 피니언 기어와, 상기 피니언 기어에 치합하는 랙기어가 전후방향으로 작동되도록 하는 액츄에이터 수단으로 이루어진 것을 특징으로 하는 판스프링 지오메트리를 이용한 자동차용 현가장치의 조종특성 제어장치.It is configured to include a control unit 30 for sending a control signal to the drive unit 20 to change the control characteristics of the car according to the driving characteristics of the driver when the vehicle is turning, the drive unit 20 is the left, right A pair of discs 21 eccentrically mounted on the front eye portion 3 of the front side, and spring pins 5 of the front eye portion 3 in the center of the front eye portion 3 on the left and right sides, respectively. Drive shaft 22 to be eccentrically rotated is connected to each other, the pinion gear formed on the drive shaft 22 and the actuator means for actuating the rack gear engaged with the pinion gear in the front and rear direction. Steering characteristics control device for vehicle suspension using leaf spring geometry. 삭제delete 제1항에 있어서,The method of claim 1, 상기 제어부(30)는 자동차의 선회시 스티어링 휠의 회전각속도를 감지하는 회전각속도 검출센서(11)로부터 이의 회전각속도를 입력받아 상기 구동부(20)에 제어신호를 전송하는 ECU(31)인 것을 특징으로 하는 판스프링 지오메트리를 이용한 자동차용 현가장치의 조종특성 제어장치.The controller 30 is an ECU 31 which receives the rotational angular velocity from the rotational angular velocity detection sensor 11 that detects the rotational angular velocity of the steering wheel when the vehicle is turning and transmits a control signal to the driving unit 20. Steering characteristics control device for vehicle suspension using leaf spring geometry. 제1항에 있어서,The method of claim 1, 상기 구동축(22)은 전방측 아이부(3)의 최고점과 최하점이 확보되도록 그 회전각도가 180°인 것을 특징으로 하는 판스프링 지오메트리를 이용한 자동차용 현가장치의 조종특성 제어장치.The drive shaft 22 is a steering characteristic control device for a vehicle suspension using a leaf spring geometry, characterized in that the rotation angle of 180 ° so as to ensure the highest point and the lowest point of the front eye portion (3).
KR1020060100520A 2006-10-16 2006-10-16 Steering control unit of automotive suspension using leaf spring geometry KR100863641B1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5967645U (en) 1982-10-27 1984-05-08 トヨタ自動車株式会社 leaf spring
JPH06206414A (en) * 1991-03-04 1994-07-26 Hino Motors Ltd Leaf suspension device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5967645U (en) 1982-10-27 1984-05-08 トヨタ自動車株式会社 leaf spring
JPH06206414A (en) * 1991-03-04 1994-07-26 Hino Motors Ltd Leaf suspension device

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