KR100514855B1 - anti-dive system of vehicles - Google Patents
anti-dive system of vehicles Download PDFInfo
- Publication number
- KR100514855B1 KR100514855B1 KR10-2003-0031571A KR20030031571A KR100514855B1 KR 100514855 B1 KR100514855 B1 KR 100514855B1 KR 20030031571 A KR20030031571 A KR 20030031571A KR 100514855 B1 KR100514855 B1 KR 100514855B1
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- South Korea
- Prior art keywords
- underbody
- connecting portion
- hydraulic cylinder
- lower arm
- front lower
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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
- B60G17/015—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
- B60G17/0164—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 mainly during accelerating or braking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G7/00—Pivoted suspension arms; Accessories thereof
- B60G7/001—Suspension arms, e.g. constructional features
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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
- B60T8/321—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration deceleration
- B60T8/3255—Systems in which the braking action is dependent on brake pedal data
- B60T8/326—Hydraulic systems
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- 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
- B60G2204/10—Mounting of suspension elements
- B60G2204/12—Mounting of springs or dampers
- B60G2204/124—Mounting of coil springs
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- 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
- B60G2800/01—Attitude or posture control
- B60G2800/014—Pitch; Nose dive
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- 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
- B60G2800/22—Braking, stopping
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
본 발명은 자동차의 안티 다이브 시스템에 관한 것으로, 차체 언더바디(2)의 하부에 설치된 유압실린더(4)에 의해 승강되는 승강부재(4c)의 상부에 프론트로어암(1)의 언더바디연결부(G)가 얹혀지는 구조로 이루어져 있으며, 상기 유압실린더(4)는 제동유압라인(8)으로부터 제동시 동시에 유압을 공급받게 된다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-dive system of an automobile, and includes an underbody connection portion of the front lower arm (1) on an elevating member (4c) that is elevated by an hydraulic cylinder (4) installed under the vehicle body (2). G) is mounted on the structure, the hydraulic cylinder (4) is supplied with hydraulic pressure at the same time when braking from the brake hydraulic line (8).
따라서, 제동시 상기 유압실린더(4)의 작용에 의해 프론트로어암(1)의 언더바디연결부(G) 높이가 상승함으로써 전축의 다이브량이 보상되어 후축 하중감소로 인한 리어브레이크 선행 잠김현상이 해소되어 제동시 차량자세가 안정적으로 유지되는 효과가 있다.Therefore, when braking, the height of the underbody connecting portion G of the front lower arm 1 is increased by the action of the hydraulic cylinder 4, thereby compensating the dive of the front axle and eliminating the rear brake prelock due to the reduction of the rear axle load. The vehicle posture is stable when braking.
또한, 평상 주행시에는 유압이 작용하지 않으므로 프론트로어암(1) 언더바디연결부(G)의 높이가 원래의 상태를 유지하므로 정상적인 양호한 승차감을 느낄 수 있게 된다.In addition, since the hydraulic pressure does not work during normal driving, the height of the front lower arm 1 underbody connecting portion G maintains its original state, so that a normal good riding feeling can be felt.
Description
본 발명은 자동차의 안티 다이브 시스템에 관한 것으로, 특히 제동시 다이브량을 감소시켜 리어브레이크가 먼저 잠기는 현상을 방지할 수 있도록 된 자동차의 안티 다이브 시스템에 관한 것이다.The present invention relates to an anti-dive system of a vehicle, and more particularly, to an anti-dive system of a vehicle that can reduce the amount of dive during braking to prevent the rear brake from locking first.
일반적으로 차량이 주행중 제동을 하게 되면 하중이 앞으로 쏠리면서 차량의 전축은 다이브(dive)되고 후축은 리프팅(lifting)되는 현상이 발생한다.In general, when the vehicle is braking while driving, the load is forwarded and the front axle of the vehicle dives and the rear axle is lifted.
이와 같이 후축이 리프팅되면 후축에 걸리는 하중이 작아져서 리어브레이크가 프론트브레이크보다 먼저 잠기는(locking) 현상이 발생하게 되며, 이 때문에 차량의 자세가 불량해지는 문제점이 있었다.As such, when the rear axle is lifted, the load applied to the rear axle decreases, causing the rear brake to lock before the front brake, which causes a problem in that the attitude of the vehicle is poor.
따라서, 상기와 같은 리어브레이크의 선행 잠김현상을 방지하기 위하여 종래에는 프로포셔닝밸브(P-valve)나 로드센싱프로포셔닝밸브(L-valve)등을 사용하여 리어브레이크로 공급되는 유압을 제동초기부터 강제적으로 감압시키는 방법을 사용하고 있는데, 이 경우에는 제동효율 측면에서 많은 손실이 있게 되는 문제점이 있다.Therefore, in order to prevent the above locking of the rear brake as described above, conventionally, the hydraulic pressure supplied to the rear brake is braked by using a proportioning valve (P-valve) or a load sensing proportioning valve (L-valve). The method of forcibly depressurizing from the beginning has been used, in which case there is a problem in that there is a lot of loss in terms of braking efficiency.
한편, 차량 전축의 다이브량이 줄어들게 되면 상기와 같이 후축의 하중이 가벼워짐으로써 발생하는 리어브레이크의 선행 잠김 현상이 감소될 것이다.On the other hand, if the dive amount of the vehicle front axle is reduced as described above, the pre-locking phenomenon of the rear brake caused by the light weight of the rear axle will be reduced.
그러나, 현재 차량의 프론트로어암의 차체 언더바디에 장착되는 언더바디연결부(G)의 위치를 무조건 높이게 되면 다이브량을 줄일 수는 있지만, 대신 승차감이 저하되는 문제점이 발생하게 된다.However, if the position of the underbody connecting portion G, which is currently mounted on the body underbody of the front lower arm of the vehicle, is unconditionally increased, the amount of dives may be reduced, but the riding comfort may be deteriorated instead.
이에 본 발명은 상기와 같은 문제점을 감안하여 발명된 것으로, 제동시에는 언더바디연결부의 위치를 상승시켜 다이브량을 감소시킴으로써 리어브레이크의 선행 잠김 현상을 해소하고, 주행중에는 통상적인 언더바디연결부의 위치를 유지함으로써 승차감 저하 현상을 방지할 수 있도록 된 자동차의 안티 다이브 시스템을 제공함에 그 목적이 있다.Accordingly, the present invention has been invented in view of the above-mentioned problems. When braking, the position of the underbody connecting portion is raised to reduce the amount of dives, thereby eliminating the pre-locking phenomenon of the rear brake, and the position of the normal underbody connecting portion during driving. It is an object of the present invention to provide an anti-dive system of a vehicle that can prevent the deterioration of the ride comfort by maintaining a.
상기와 같은 목적을 달성하기 위한 본 발명은, 차체 언더바디의 하면 중 프론트로어암의 언더바디연결부 장착위치에 유압실린더가 설치되고, 이 유압실린더의 피스톤 로드 단부에 승강부재가 형성되며, 이 승강부재에 상기 차체 언더바디의 상부로 연장되는 마운팅바가 형성되고, 이 마운팅바에 관통되는 상태로 상기 프론트로어암의 언더바디연결부가 상기 승강부재에 얹혀지며, 상기 유압실린더는 제동유압라인에 쓰리웨이커넥터를 매개로 분지된 유압공급라인을 통하여 제동시 유압을 공급받는 구조로 이루어진다.According to the present invention for achieving the above object, the hydraulic cylinder is installed in the mounting position of the underbody connecting portion of the front lower arm of the lower body of the body underbody, the lifting member is formed on the piston rod end of the hydraulic cylinder, this lifting The member is formed with a mounting bar extending to the upper portion of the body underbody, the underbody connecting portion of the front lower arm is mounted on the lifting member in a state penetrating the mounting bar, the hydraulic cylinder is a three-way connector on the braking hydraulic line It consists of a structure that receives the hydraulic pressure when braking through the hydraulic supply line branched through.
이하, 본 발명을 첨부된 예시도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.
도 1은 본 발명에 따른 자동차의 안티 다이브 시스템의 구성도이다.1 is a block diagram of an anti-dive system of a vehicle according to the present invention.
본 발명은 차량 전축의 너클과 차체 언더바디를 연결하는 프론트로어암(1)의 차체 언더바디와의 연결점인 언더바디연결부(G)의 높낮이를 가변적으로 조절할 수 있도록 함에 그 특징이 있다.The present invention is characterized in that it is possible to variably adjust the height of the underbody connecting portion (G), which is a connection point with the body underbody of the front lower arm (1) connecting the knuckle of the vehicle front axle and the body underbody.
상기 언더바디연결부(G)의 형상은 원형축 형상의 부재를 이용하여 차체 언더바디(2)에 장착할 수 있도록 원판형의 중앙에 구멍(Ga)이 형성된 형상으로 되어 있다.The shape of the underbody connecting portion G has a shape in which a hole Ga is formed in the center of the disc shape so that the underbody connecting portion G can be attached to the underbody body 2 using a member having a circular shaft shape.
상기 차체 언더바디(2)에 있어서 상기 프론트로어암(1)의 언더바디연결부(G) 장착위치의 하면에는 원통형의 하우징(3)이 고정장착된다.The cylindrical housing 3 is fixedly mounted on the lower surface of the underbody connecting portion G of the front lower arm 1 in the vehicle body underbody 2.
상기 하우징(3)의 내측 하부에는 유압실린더(4)가 내장되는데, 이 유압실린더(4)는 내부에 피스톤(4a)을 구비하고 있으며, 이 피스톤(4a)의 로드(4b)는 실린더의 외측까지 상방으로 연장되고 그 단부에 원판형의 승강부재(4c)가 형성된다.A hydraulic cylinder 4 is built in the inner lower portion of the housing 3, and the hydraulic cylinder 4 has a piston 4a therein, and the rod 4b of the piston 4a is the outer side of the cylinder. It extends upward until the disk-shaped lifting member 4c is formed at its end.
상기 승강부재(4c)는 상기 하우징(3)의 내경상에서 상하방향으로 슬라이딩 이동된다.The lifting member 4c is slidably moved up and down on the inner diameter of the housing 3.
한편, 상기 승강부재(4c)의 상면에는 상기 차체 언더바디(2)의 상부까지 연장되는 마운팅바(4d)가 일체로 형성되는데, 상기 프론트로어암(1)의 언더바디연결부(G)는 중앙에 형성된 구멍(Ga)이 상기 마운팅바(4d)에 관통되는 상태로 상기 승강부재(4c)의 상면에 얹혀진다.On the other hand, a mounting bar (4d) extending to the upper portion of the body underbody (2) is formed integrally on the upper surface of the elevating member (4c), the underbody connecting portion (G) of the front lower arm (1) is the center A hole Ga formed in the upper portion of the elevating member 4c is mounted on the mounting bar 4d.
이때 상기 하우징(3)의 일측에는 승강부재(4c)에 의해 상기 언더바디연결부(G)가 동시에 승강될 때 언더바디연결부(G)에 연결된 아암부(Gb)가 상하이동할 수 있도록 개구(3a)가 형성되어 있음은 물론이다.At this time, when the underbody connecting portion G is simultaneously elevated by the elevating member 4c on one side of the housing 3, the arm portion Gb connected to the underbody connecting portion G may move upward and downward. Of course it is formed.
상기와 같은 조립상태에서 상기 마운팅바(4c)에 즉, 상기 언더바디연결부(G)의 위로 스프링(5)을 끼우고, 상기 하우징(3)의 상단을 차체 언더바디(2)의 하면에 장착한다.(장착방법은 하우징(3)의 상단에 플랜지를 형성하고, 이 플랜지와 차체 언더바디(2)를 상호 볼트로 연결하는 등의 방법을 사용할 수 있으나, 본 발명의 요지가 아니므로 도시하지는 않는다.)In the assembly state as described above, the spring 5 is inserted into the mounting bar 4c, that is, above the underbody connecting portion G, and the upper end of the housing 3 is mounted on the lower surface of the underbody body 2. (Mounting method may be a method of forming a flange on the upper end of the housing (3) and connecting the flange and the body underbody (2) by mutual bolts, but not shown in the drawing because it is not the gist of the present invention. Does not.)
한편, 하우징(3)내의 유압실린더(4)는 마스터실린더(6)로부터 브레이크 어셈블리의 휠실린더(7)로 유압을 공급하는 제동유압라인(8)상에 쓰리웨이커넥터(9)를 설치하고, 이 쓰리웨이커넥터(9)와 상기 유압실린더(4)를 연결하는 유압공급라인(10)을 설치하여, 제동시 휠실린더(7)와 동시에 유압을 공급받을 수 있도록 한다.On the other hand, the hydraulic cylinder 4 in the housing 3 is provided with a three-way connector 9 on the brake hydraulic line (8) for supplying hydraulic pressure from the master cylinder (6) to the wheel cylinder (7) of the brake assembly, By installing the three-way connector (9) and the hydraulic supply line 10 for connecting the hydraulic cylinder (4), it is possible to receive the hydraulic pressure at the same time with the wheel cylinder (7) during braking.
이하, 본 발명의 작용 및 효과를 설명한다.Hereinafter, the operation and effects of the present invention will be described.
평상 주행시 상기 유압실린더(4)에는 유압이 공급되어 있지 않으므로 피스톤(4a)은 최저 높이에 위치해 있게 되고, 이때 승강부재(4c)는 유압실린더(4)의 몸체 상부면에 얹혀져 있는 상태로서, 이 승강부재(4c)에 얹혀져--스프링(5)에 의해 가압되면서--있는 프론트로어암(1)의 언더바디연결부(G) 높이는 상기 하우징(3)이 차체 언더바디(2)에 고정장착되어 있으므로 일정한 높이를 유지하게 된다.Since the hydraulic cylinder 4 is not supplied with hydraulic pressure during normal driving, the piston 4a is positioned at the minimum height, and the lifting member 4c is mounted on the upper surface of the body of the hydraulic cylinder 4. The height of the underbody connecting portion (G) of the front lower arm (1), which is mounted on the elevating member (4c) and is pressed by the spring (5), is fixedly mounted to the underbody (2) of the housing (3). Therefore, it maintains a constant height.
이러한 상태에서 운전자가 브레이크페달(11)을 밟아 제동이 실시되면, 마스터실린더(6)에서 발생한 유압이 제동유압라인(8)을 따라 휠실린더(7)로 공급됨과 동시에 쓰리웨이커넥터(9)에 의해 유압공급라인(10)을 매개로 상기 유압실린더(4)에도 공급된다.In this state, when the driver brakes by stepping on the brake pedal 11, the hydraulic pressure generated in the master cylinder 6 is supplied to the wheel cylinder 7 along the brake hydraulic line 8 and simultaneously to the three-way connector 9. By the hydraulic supply line 10 is also supplied to the hydraulic cylinder (4).
유압이 공급되면, 상기 피스톤(4a)의 상승에 의해 승강부재(4c)가 상승하게 되며, 따라서 동시에 프론트로어암(1)의 언더바디연결부(G) 높이도 상승하게 된다.When the hydraulic pressure is supplied, the lifting member 4c is raised by the raising of the piston 4a, and therefore the height of the underbody connecting portion G of the front lower arm 1 is also raised.
이와 같이, 프론트로어암(1)의 언더바디연결부(G) 높이가 상승함으로써 제동시 차량의 앞부분에 발생하는 다이브량이 보상되게 되는데, 즉, 결과적으로는 다이브량이 감소하거나 최적으로 보상된 경우에는 다이브가 발생하지 않는 결과를 가져 오게 된다.As such, the height of the underbody connecting portion G of the front lower arm 1 is increased to compensate for the amount of dive generated at the front of the vehicle during braking, that is, as a result, the dive amount is reduced or optimally compensated. Will result in no occurrence.
따라서, 다이브 발생시와 같이 전축에 하중이 몰리고 후축에 하중이 감소하여 리어브레이크가 프론트브레이크보다 먼저 잠기는 리어브레이크 선행 잠김 현상이 발생하지 않게 되며, 이로써 제동시 차량 자세를 안정적으로 유지할 수 있게 된다.Therefore, as in the case of the dive, the load is applied to the front shaft and the load is reduced to the rear shaft so that the rear brake pre-locking phenomenon in which the rear brake is locked before the front brake does not occur, thereby stably maintaining the vehicle posture during braking.
한편, 차량 주행시에는 상기와 같이 상승된 언더바디연결부(G) 높이가 유지되면 승차감이 저하되는데, 본 발명에서 상기 유압실린더(4)에는 운전자가 브레이크페달(11)을 밟는 제동시에만 유압이 공급되고, 운전자가 브레이크페달(11)로부터 발을 뗀 순간부터는 휠실린더(7)와 마찬가지로 유압이 공급되지 않게 됨으로써, 피스톤(4a)이 원위치로 하강--스프링(5)은 이 같은 하강작동을 보조한다.--함에 따라 언더바디연결부(G)의 높이는 최초 설정(설계사항)된 정상 주행시의 높이를 유지하게 되어 정상적인 양호한 승차감을 제공하게 된다.On the other hand, while driving the vehicle, if the height of the underbody connection portion (G) raised as described above is maintained, ride comfort is reduced. Since the hydraulic pressure is not supplied from the moment when the driver steps out of the brake pedal 11, like the wheel cylinder 7, the piston 4a is lowered to the original position.The spring 5 assists in this lowering operation. As a result, the height of the underbody connecting portion (G) is maintained at the height of the initial set (design matter) during normal driving to provide a normal good riding comfort.
이상 설명한 바와 같이 본 발명에 따르면, 프론트로어암의 언더바디연결부 높이가 제동시 높아짐으로써 전축에 다이브가 발생하지 않게 되어 후축 하중 감소로 인한 리어브레이크 선행 잠김현상에 의해 차량자세가 불안정해지는 현상이 해소된다.As described above, according to the present invention, the height of the underbody connecting portion of the front lower arm is increased during braking so that a dive does not occur on the front axle, and thus the vehicle posture becomes unstable due to the rear brake pre-locking phenomenon due to the reduction of the rear axle load. do.
또한, 보통 주행시에는 상기 언더바디연결부 높이가 원래의 높이로 복원됨으로써 정상적인 양호한 승차감을 확보할 수 있게 되는 효과가 있다.In addition, during normal driving, the underbody connection portion is restored to its original height, thereby ensuring a normal good riding comfort.
도 1은 본 발명에 따른 자동차의 안티 다이브 시스템의 구성도,1 is a block diagram of an anti-dive system of a vehicle according to the present invention,
도 2는 본 발명의 요부인 유압실린더와 프론트로어암 언더바디연결부의 설치상태도이다.Figure 2 is an installation state diagram of the hydraulic cylinder and the front lower arm underbody connecting portion of the present invention.
*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *
1 : 프론트로어암, G : 언더바디연결부,1: front lower arm, G: underbody connection,
Ga : 구멍, Gb : 아암부,Ga: hole, Gb: arm part,
2 : 차체 언더바디, 3 : 하우징,2: body underbody, 3: housing,
3a : 개구, 4 : 유압실린더,3a: opening, 4: hydraulic cylinder,
4a : 피스톤, 4b : 로드,4a: piston, 4b: rod,
4c : 승강부재, 4d : 마운팅바,4c: lifting member, 4d: mounting bar,
5 : 스프링, 6 : 마스터실린더,5: spring, 6: master cylinder,
7 : 휠실린더, 8 : 제동유압라인,7: wheel cylinder, 8: braking hydraulic line,
9 : 쓰리웨이커넥터, 10 : 유압공급라인,9: three way connector, 10: hydraulic supply line,
11 : 브레이크페달.11: brake pedal.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2003-0031571A KR100514855B1 (en) | 2003-05-19 | 2003-05-19 | anti-dive system of vehicles |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2003-0031571A KR100514855B1 (en) | 2003-05-19 | 2003-05-19 | anti-dive system of vehicles |
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| Publication Number | Publication Date |
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| KR20040099553A KR20040099553A (en) | 2004-12-02 |
| KR100514855B1 true KR100514855B1 (en) | 2005-09-14 |
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| KR101273113B1 (en) * | 2007-12-12 | 2013-06-13 | 현대자동차주식회사 | Variable apparatus for automotive anti-dive system |
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