KR20030021446A - Front suspension in vehicle - Google Patents

Front suspension in vehicle Download PDF

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Publication number
KR20030021446A
KR20030021446A KR1020010054723A KR20010054723A KR20030021446A KR 20030021446 A KR20030021446 A KR 20030021446A KR 1020010054723 A KR1020010054723 A KR 1020010054723A KR 20010054723 A KR20010054723 A KR 20010054723A KR 20030021446 A KR20030021446 A KR 20030021446A
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KR
South Korea
Prior art keywords
vehicle
wheel
lower arm
center
tie rod
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Application number
KR1020010054723A
Other languages
Korean (ko)
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KR100428142B1 (en
Inventor
우승훈
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현대자동차주식회사
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Priority to KR10-2001-0054723A priority Critical patent/KR100428142B1/en
Publication of KR20030021446A publication Critical patent/KR20030021446A/en
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Publication of KR100428142B1 publication Critical patent/KR100428142B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G3/00—Resilient suspensions for a single wheel
    • B60G3/18—Resilient suspensions for a single wheel with two or more pivoted arms, e.g. parallelogram
    • B60G3/20—Resilient suspensions for a single wheel with two or more pivoted arms, e.g. parallelogram all arms being rigid
    • B60G3/26—Means for maintaining substantially-constant wheel camber during suspension movement ; Means for controlling the variation of the wheel position during suspension movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00—Indexing codes relating to suspension types
    • B60G2200/40—Indexing codes relating to the wheels in the suspensions
    • B60G2200/462—Toe-in/out
    • 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
    • B60G2206/017—Constructional features of suspension elements, e.g. arms, dampers, springs forming an eye for the bushing
    • 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
    • B60G2800/244—Oversteer
    • 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
    • B60Y2300/0223—Stability in turns or during cornering related to over-steering
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D17/00—Means on vehicles for adjusting camber, castor, or toe-in

Abstract

PURPOSE: A front suspension system for a vehicle is provided to prevent over steering when a vehicle turns by putting extended center of a lower arm and a tie rod in front and outside of a wheel. CONSTITUTION: A front suspension system for a vehicle comprises a stabilizer(40); a shock absorber; an upper arm(10); a lower arm(20) and a tie rod(30). The stabilizer crosses breath of the vehicle to maintain turning stability. The shock absorber absorbs shock from a road. A wheel(W) is equipped to a knuckle. The upper arm and the lower arm are equipped between the knuckle and a vehicle body. The tie rod is placed in a back area from center of the wheel and connected with a steering device of the vehicle. An extended center point(O') from the lower arm and the tie rod is placed to a front area ahead of center of the wheel(O). Therefore, straight forward driving stability is improved and over steering is prevented.

Description

차량의 전방 현가장치{Front suspension in vehicle}Front suspension in vehicle

본 발명은 차량의 전방 현가장치에 관한 것으로, 보다 상세하게는 차량의 선회 시 발생되는 순간중심을 차륜의 바깥쪽으로 형성시켜 차량의 전방 현가장치에 관한 것이다.The present invention relates to a front suspension of a vehicle, and more particularly, to a front suspension of a vehicle by forming an instantaneous center generated at the time of turning of the vehicle to the outside of the wheel.

일반적으로 차량의 현가 장치는 노면으로부터 오는 진동을 흡수하며 각종 부품들이 받는 충격을 완충시켜 차량의 승차감을 결정할 뿐만 아니라 차체의 선회 시 쏠림을 방지하고 차체의 평형을 유지하는 기능을 하는 것으로 이와 같은 현가장치는 도 1에 도시된 바와 같이, 차륜(W)이 장착된 너클과 차체 사이에서 상·하로 구비된 어퍼·로워아암(10,20)과, 차량의 선회시 선회 안정성을 유지하기 위해 차폭을 가로지르는 스테빌라이저(40) 및 노면으로부터 가해지는 충격을 흡수하기 위한 쇽업소버(도시되어 있지 않음)로 이루어지게 된다.In general, the suspension device of the vehicle absorbs vibrations from the road surface and buffers the shocks of various parts to determine the ride comfort of the vehicle, and also prevents the vehicle from turning and maintains the equilibrium of the vehicle body. As shown in FIG. 1, the apparatus includes upper and lower arms 10 and 20 provided up and down between a knuckle equipped with wheels W and a vehicle body, and a vehicle width to maintain turning stability when turning the vehicle. The stabilizer 40 traverses and a shock absorber (not shown) to absorb the impact from the road surface.

미설명 도면부호 30은 차량의 조향장치와 연결되면서 정확한 조종성을 위해 볼조인트를 매개로 고정되어 차륜(W)을 조작하는 타이로드로서, 통상 조향기어박스가 변속기의 파워트래인 후방으로 위치되는 특성상 차륜(W)의 센터포인트(O)에 대해 후방으로 위치되어진다.Reference numeral 30 is a tie rod which is connected to the steering device of the vehicle and is fixed via a ball joint to manipulate the wheels W for accurate maneuverability. In general, the steering gear box is located behind the power train of the transmission. It is located rearward with respect to the center point O of the wheel W.

여기서, 상기 로워아암(20)은 부시등으로 이루어진 3곳의 마운팅포인트(A,B,G)를 매개로 차체와 차륜(W)사이에 고정되어져 가해지는 외력에 따라 어느 정도 움직임을 갖게 됨은 물론이다.Here, the lower arm 20 is fixed between the vehicle body and the wheel (W) via the three mounting points (A, B, G) made of a bush, etc. to have a certain degree of movement according to the external force applied to be.

그러나, 이와 같은 현가장치의 구조는 차량의 선회 시 차륜(W)에 횡력(FL)이 가해지면 차륜(W)의 앞부분을 지지하고 있던 로워아암(20)의 B점은 부시로 연결되어 변형력(F)을 받아 변형되는 반면, 상기 차륜(W)의 뒤쪽에서 볼조인트로 고정된 타이로드(30)는 변형을 거의 발생시키지 않게 되는데 이와 같이, 상기 차륜(W)에대해 로워아암(20)과 타이로드(30)의 마운팅포인트의 특성에 따라 결국, 상기 로워아암(20)의 B점 변위에 의해 차륜(W)의 센터라인이 변형라인으로 변화되면서 안쪽으로 이동되는 토우인(Toe in)현상으로 인해 오버스티어링이 발생되는 문제가 있게 된다.However, in the structure of such a suspension system, when the lateral force FL is applied to the wheel W during the turning of the vehicle, the B point of the lower arm 20, which was supporting the front part of the wheel W, is connected to the bush so that the deformation force ( F) while being deformed, the tie rod 30 fixed to the ball joint at the rear of the wheel (W) hardly generates deformation. Thus, the lower arm (20) with respect to the wheel (W) According to the characteristic of the mounting point of the tie rod 30, the center line of the wheel W is changed to the deformation line by the displacement of the B point of the lower arm 20, and the toe in phenomenon is moved inward. This causes a problem of oversteering.

이에 따라, 이를 방지하기 위해 서브프레임을 장착하여 서브프레임이 횡력에 의해서 언더스티어링(Under Steering)방향으로 밀리도록 하여 오버스티어링을 방지할 수 있지만 이와 같이, 상기 서브프레임을 사용하게 되면 설계시 레이아웃(Lay Out)상 제약이 많고 서브프레임의 장착을 위한 공정이 추가되면서 중량과 가격도 상승되는 문제가 있게 된다.Accordingly, in order to prevent this, the subframe may be mounted so that the subframe may be pushed in the understeering direction due to the lateral force, thereby preventing oversteering. Lay Out) has a lot of constraints, and as the process for mounting the subframe is added, there is a problem that the weight and the price also increase.

이에 본 발명은 상기와 같은 점을 감안하여 발명된 것으로, 로워아암과 타이로드의 연장 중심이 차륜의 앞쪽이면서 바깥쪽으로 위치되도록 하여 차량의 선회 시 오버스티어링을 방지하면서 직진 안정성도 향상함에 그 목적이 있다.Accordingly, the present invention has been made in view of the above-mentioned matters, and the center of extension of the lower arm and the tie rod is located at the front and the outside of the wheel to prevent the oversteering during the turning of the vehicle and to improve the straight stability. have.

상기와 같은 목적을 달성하기 위한 본 발명은, 차량의 선회시 선회 안정성을 유지하기 위해 차폭을 가로지르는 스테빌라이저와 노면으로부터 가해지는 충격을 흡수하기 위한 쇽업소버로 이루어지면서 차륜이 장착된 너클과 차체 사이에서 상·하로 구비된 어퍼·로워아암 및 차륜의 중심에 대해 후방으로 위치되어 차량의 조향장치와 연결되는 타이로드로 이루어지되, 상기 차륜의 너클로 연결된 로워아암과 타이로드의 연장선상의 중심인 연장중심포인트가 차륜중심보다 전방으로 위치되어진 것을 특징으로 한다.The present invention for achieving the above object, the knuckle and the vehicle body is equipped with wheels while the stabilizer across the vehicle width and the shock absorber for absorbing the impact from the road surface to maintain the turning stability when turning the vehicle The upper and lower arms provided between the upper and lower sides and the tie rods located rearward with respect to the center of the wheel and connected to the steering device of the vehicle, wherein the lower arm and the tie rods connected by the knuckle of the wheel are centered on the extension line. An extension center point is positioned forward of the wheel center.

도 1은 종래에 따른 차량의 전방현가장치의 구성도1 is a block diagram of a front suspension of a vehicle according to the prior art

도 2는 본 발명에 따른 선회 시 토우인 방지기능을 갖는 차량의 전방 현가장치의 구성도2 is a block diagram of a front suspension of a vehicle having a toe-in prevention function when turning in accordance with the present invention;

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

10 : 어퍼아암20 : 로워아암10: upper arm 20: lower arm

30 : 타이로드40 : 스테빌라이저30: tie rod 40: stabilizer

A,B,G : 마운팅포인트A, B, G: Mounting Point

F : 변형력FL : 횡력F: strain forceFL: lateral force

O : 차륜중심O: Wheel center

O' : 연장선상중심Ti : 토우인O ': Center on extension line Ti: Toe-in

To : 토우아웃To: Toe Out

이하 본 발명의 실시예를 첨부된 예시도면을 참조로 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명에 따른 선회 시 토우인 방지기능을 갖는 차량의 전방 현가장치의 구성도를 도시한 것인바, 본 발명은 차량의 선회시 선회 안정성을 유지하기 위해 차폭을 가로지르는 스테빌라이저(40)와 노면으로부터 가해지는 충격을 흡수하기 위한 쇽업소버로 이루어지면서 차륜(W)이 장착된 너클과 차체 사이에서 상·하로 구비된 어퍼·로워아암(10,20) 및 차륜(W)의 중심(O)에 대해 후방으로 위치되어 차량의 조향장치와 연결되는 타이로드(30)로 이루어지되, 상기 차륜(W)의 너클로 연결된 로워아암(20)과 타이로드(30)의 연장선상의 중심인 연장중심포인트(O')가 차륜중심(O)보다 전방으로 위치되어진다.Figure 2 shows a block diagram of the front suspension of the vehicle having a toe-in prevention function when turning in accordance with the present invention, the present invention is stabilizer 40 across the width of the vehicle to maintain the turning stability when turning the vehicle And the center of the upper / lower arms 10 and 20 and the wheels W provided up and down between the knuckles on which the wheels W are mounted and the vehicle body, and the shock absorbers for absorbing the shocks applied from the road surface. It is composed of a tie rod (30) positioned rearward with respect to the steering device of the vehicle, the center of extension of the lower arm 20 and the tie rod (30) connected by the knuckle of the wheel (W) The point O 'is located forward of the wheel center O.

여기서, 상기 로워아암(20)과 차체(F)가 서로 간격을 두고 2곳의 마운팅포인트(A,G)로 결합되고 로워아암(20)과 차륜(W)이 1곳의 마운팅포인트(B)로 결합되되, 상기 A마운팅포인트가 필로우볼부시(Pillow Ball Bush)를 이용하는데 반해 G마운팅포인트가 상대적으로 강성이 약한 부시를 사용하여 선회 시 횡방향의 힘에 대해 상기 로워아암(20)의 A마운팅포인트와 B마운팅포인트가 1개의 링크처럼 운동하도록 된다.Here, the lower arm 20 and the vehicle body F are coupled to two mounting points A and G at intervals from each other, and the lower arm 20 and the wheel W are mounted to one mounting point B. While the A mounting point uses a pillow ball bush, the G mounting point uses a relatively weak bush, and the A of the lower arm 20 is turned against the force in the lateral direction when turning. The mounting point and the B mounting point will behave like one link.

이에 따라, 차량의 선회 시 차륜(W)에 횡력(FL)이 가해지면 차륜(W)의 앞부분을 지지하고 있던 로워아암(20)의 A점과 B점의 연장선과 타이로드(30)와 차륜(W)의 연장선상에 존재하는 가상의 연장중심포인트(O')가 차륜중심(O)보다 전방으로 위치되는 특성상, 상기 로워아암(20)과 타이로드(30)가 결합된 너클의 순간중심이 차륜중심(O)보다 전방에 존재하여 이 차륜중심(O)의 아래쪽에 작용되는 횡력에 대해 토우아웃(Toe Out)방향의 모우멘트가 작용되어 토우아웃 즉, 언더스티어링을 발생시키게 된다.Accordingly, when the lateral force FL is applied to the wheel W during the turning of the vehicle, the extension lines of the points A and B of the lower arm 20 supporting the front part of the wheel W, the tie rod 30 and the wheel The virtual center of extension point O 'existing on the extension line of (W) is located forward of the center of wheel O, and the moment center of the knuckle to which the lower arm 20 and the tie rod 30 are coupled. Moments in the direction of the toe out are applied to the lateral force which is present in front of the wheel center O and acts below the wheel center O to generate toe-out, that is, understeering.

또한, 본 발명은 상기 로워아암(20)의 A점과 B점의 연장선과 타이로드(30)와 차륜(W)의 연장선상에 존재하는 가상의 연장중심포인트(O')가 차륜(W)의 바깥부위로 위치되어 충격력이나 브레이크의 제동력등과 같이 종 방향으로 작용되는 힘에 대해 토우인을 유도하는 힘(Ti)이 차륜(W)에 유도되므로 직진 안정성이 안정적으로 됨은 물론이다.In addition, in the present invention, the extension point of the A and B points of the lower arm 20, and the virtual extension center point O 'existing on the extension line of the tie rod 30 and the wheel W, the wheel W Since the force (Ti) is induced to the wheel (W) is located in the outer portion of the force acting in the longitudinal direction for the force acting in the longitudinal direction, such as the impact force or the braking force of the brake, of course, the straight stability is of course stable.

한편, 본 발명은 상기 로워아암(20)의 A마운팅포인트가 강성이 큰 필로우볼부시로 이루어져 로워아암(20)의 A마운팅포인트와 B마운팅포인트를 잇는 1개의 링크처럼 운동시켜 횡강성이 강화되면서도, 상기 로워아암(20)의 A마운팅포인트가 종방향 힘에 대해서는 이를 중심으로 회전되므로 완충성능이 저하되지 않게 됨은 물론이다.On the other hand, the present invention consists of a pillow ball bushing of the A mounting point of the lower arm 20 has a large rigidity as a link between the A mounting point and the B mounting point of the lower arm 20 while the lateral rigidity is enhanced Since the mounting point of the lower arm 20 is rotated about the longitudinal force, the cushioning performance is of course not lowered.

이상 설명한 바와 같이 본 발명에 의하면, 횡력에 의해서 언더스티어링방향으로 밀리게 하는 서브프레임을 이용하지 않고 로워아암과 타이로드의 연장 중심이 차륜의 앞쪽이면서 바깥쪽으로 위치되도록 하여 차량의 선회 시 오버스티어링을 방지하면서 직진 안정성도 향상시킬 수 있는 효과가 있게 된다.As described above, according to the present invention, the center of extension of the lower arm and the tie rod is located in front of the wheel and outward without using a subframe that pushes in the understeering direction due to the lateral force. It is also effective to improve the stability while going straight.

Claims (2)

스테빌라이저(40)와 쇽업소버 및 차륜(W)이 장착된 너클과 차체 사이에서 상·하로 구비된 어퍼·로워아암(10,20)과 차륜(W)의 중심(O)에 대해 후방으로 위치되어 차량의 조향장치와 연결되는 타이로드(30)로 이루어지되, 상기 차륜(W)의 너클로 연결된 로워아암(20)과 타이로드(30)의 연장선상의 중심인 연장중심포인트(O')가 차륜중심(O)보다 전방으로 위치되어진 차량의 전방 현가장치.Positioned backward with respect to the center O of the upper and lower arms 10 and 20 and the wheel W provided up and down between the stabilizer 40, the knuckle equipped with the shock absorber and the wheel W, and the vehicle body. Is made of a tie rod 30 is connected to the steering device of the vehicle, the lower arm 20 connected to the knuckle of the wheel (W) and the extension center point (O ') which is the center on the extension line of the tie rod 30 is A front suspension of a vehicle positioned forward of the wheel center (O). 제 1항에 있어서, 상기 로워아암(20)과 차체(F)가 서로 간격을 두고 2곳의 마운팅포인트(A,G)로 결합되고 로워아암(20)과 차륜(W)이 1곳의 마운팅포인트(B)로 결합되되, 상기 A마운팅포인트가 필로우볼부시(Pillow Ball Bush)를 이용하는데 반해 G마운팅포인트가 상대적으로 강성이 약한 부시를 사용하여 선회 시 횡방향의 힘에 대해 상기 로워아암(20)의 A마운팅포인트와 B마운팅포인트가 1개의 링크처럼 운동하도록 된 것을 특징으로 하는 차량의 전방 현가장치.The lower arm 20 and the vehicle body F are coupled to two mounting points A and G at intervals from each other, and the lower arm 20 and the wheel W are mounted at one location. The mounting arm is coupled to the point (B), while the mounting point A uses a pillow ball bush, whereas the mounting point G uses a relatively weak bush, the lower arm is turned against the force in the lateral direction when turning. 20) A front suspension of a vehicle, characterized in that the A mounting point and the B mounting point are to move as one link.
KR10-2001-0054723A 2001-09-06 2001-09-06 Front suspension in vehicle KR100428142B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101428598B1 (en) * 2009-10-07 2014-09-23 현대자동차주식회사 Structure for multi-link suspension of a car using a hydraulic actuator
CN110274123A (en) * 2018-03-15 2019-09-24 清华大学深圳研究生院 Motion planning and robot control structure is peeped in a kind of micro radio

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6082412A (en) * 1983-10-13 1985-05-10 Mazda Motor Corp Rear suspension for car
JPH0261774U (en) * 1988-10-31 1990-05-08
JP3170032B2 (en) * 1992-03-26 2001-05-28 富士重工業株式会社 Car front suspension
KR100242104B1 (en) * 1997-08-02 2000-03-02 정몽규 A structure for connecting a low arm of front suspension having a double link

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101428598B1 (en) * 2009-10-07 2014-09-23 현대자동차주식회사 Structure for multi-link suspension of a car using a hydraulic actuator
CN110274123A (en) * 2018-03-15 2019-09-24 清华大学深圳研究生院 Motion planning and robot control structure is peeped in a kind of micro radio

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