JPH06286447A - Suspension device for automobile - Google Patents

Suspension device for automobile

Info

Publication number
JPH06286447A
JPH06286447A JP7344393A JP7344393A JPH06286447A JP H06286447 A JPH06286447 A JP H06286447A JP 7344393 A JP7344393 A JP 7344393A JP 7344393 A JP7344393 A JP 7344393A JP H06286447 A JPH06286447 A JP H06286447A
Authority
JP
Japan
Prior art keywords
road
alignment
rough
changing
road surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP7344393A
Other languages
Japanese (ja)
Inventor
Toshiro Kondo
敏郎 近藤
Akira Marumoto
明 丸本
Fumitaka Ando
文隆 安藤
Koichi Ushio
晃一 牛尾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mazda Motor Corp
Original Assignee
Mazda Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mazda Motor Corp filed Critical Mazda Motor Corp
Priority to JP7344393A priority Critical patent/JPH06286447A/en
Publication of JPH06286447A publication Critical patent/JPH06286447A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B60G7/003—Suspension arms, e.g. constructional features of adjustable length
    • 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
    • B60G17/0152—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 action on a particular type of suspension unit
    • 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
    • B60G17/0165—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 to an external condition, e.g. rough road surface, side wind
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00—Indexing codes relating to suspension types
    • B60G2200/10—Independent suspensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00—Indexing codes relating to suspension types
    • B60G2200/10—Independent suspensions
    • B60G2200/18—Multilink suspensions, e.g. elastokinematic arrangements
    • B60G2200/184—Assymetric arrangements
    • 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
    • B60G2200/46—Indexing codes relating to the wheels in the suspensions camber angle
    • 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
    • B60G2200/00—Indexing codes relating to suspension types
    • B60G2200/40—Indexing codes relating to the wheels in the suspensions
    • B60G2200/464—Caster angle
    • 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
    • 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
    • B60G2204/14—Mounting of suspension arms
    • B60G2204/148—Mounting of suspension arms on the unsprung part of the vehicle, e.g. wheel knuckle or rigid axle
    • 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
    • B60G2204/62—Adjustable continuously, e.g. during driving
    • 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
    • B60G2206/10—Constructional features of arms
    • B60G2206/11—Constructional features of arms the arm being a radius or track or torque or steering rod or stabiliser end link
    • B60G2206/111—Constructional features of arms the arm being a radius or track or torque or steering rod or stabiliser end link of adjustable length
    • B60G2206/1116—Actively adjustable during driving
    • 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
    • B60G2400/80—Exterior conditions
    • B60G2400/82—Ground surface
    • B60G2400/821—Uneven, rough road sensing affecting vehicle body vibration

Landscapes

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

Abstract

PURPOSE:To provide a suspension optimum for a travel on a flat road and for a travel on a rough road. CONSTITUTION:A suspension device is provided with alignment changing means 3a-7a, 3b-7b changing the suspension alignment, and the irregular state of the road surface is detected. When the road surface is a rough road, the alignment changing means 3a-7a, 3b-7b are operated to obtain the suspension alignment suitable for a travel on the rough road.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、自動車のサスペンショ
ン装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile suspension system.

【０００２】[0002]

【従来の技術】自動車のサスペンション装置には種々の
形式があり、その中でも独立懸架式はスイングアーム式
とダブルリンク式とに大別される。前者に関してはスイ
ングアクスル式、トレーリングアーム式、セミトレーリ
ングアーム式等が知られ、後者に関してはウイッシュボ
ーン式やマクファーソン式がある。さらに、最近では３
本のラテラルリンクと１本のトレーリングアームとを組
み合わせてなる新しい形式のサスペンションも登場して
きている（例えば特開平２−３７００５号公報参照）。2. Description of the Related Art There are various types of suspension systems for automobiles, and among them, the independent suspension type is roughly classified into a swing arm type and a double link type. Swing axle type, trailing arm type, semi-trailing arm type, etc. are known for the former, and wishbone type and McPherson type for the latter. Furthermore, recently 3
A new type of suspension, which is a combination of a lateral link and a trailing arm, has also been introduced (see, for example, JP-A-2-37005).

【０００３】上記各種のサスペンション装置では、その
サスペンションアライメント（キャスタ、キャンバ、ト
ー等）が当該自動車に応じた最適なものになるように個
々に調整されている。また、最近は走行条件に応じてサ
スペンションのばね定数とショックアブソーバの減衰力
を変えるようにした電子制御式のサスペンションも開発
されている。なお、自動車の４輪操舵装置においては、
前輪の舵角と車速とに基づいて後輪の転舵角が制御され
ている（特公平４−４１９１号公報参照）。In the above various suspension devices, the suspension alignment (caster, camber, toe, etc.) is individually adjusted so as to be optimum for the vehicle. Recently, an electronically controlled suspension has been developed in which the spring constant of the suspension and the damping force of the shock absorber are changed according to the running conditions. In addition, in the four-wheel steering system of an automobile,
The steered angle of the rear wheels is controlled based on the steered angle of the front wheels and the vehicle speed (see Japanese Patent Publication No. 4191/1992).

【０００４】[0004]

【発明が解決しようとする課題】ところで、上述のサス
ペンションアライメントを調整することによって、最適
な乗り心地と操縦安定性とが得られことは知られている
が、自動車が路面に凹凸のある悪路を走行する場合に
は、路面が平坦な舗装路を走行する場合とは、要求され
るサスペンションアライメントも違ってくる。By the way, it is known that an optimum riding comfort and steering stability can be obtained by adjusting the above-mentioned suspension alignment, but it is difficult for an automobile to have a rough road surface. In the case of traveling on a road, the suspension alignment required is different from that on a paved road where the road surface is flat.

【０００５】上述の電子制御式のサスペンションはこの
ような悪路走行時にばね定数を所謂ソフトにすることが
でき、乗り心地性の向上等に有効であるが、本発明の課
題は、これとは異なる観点から、悪路走行時の乗り心地
や操縦安定性の向上を図ることにある。The electronically controlled suspension described above can make the spring constant so-called soft when traveling on such a bad road, and is effective for improving riding comfort. However, the object of the present invention is to From a different point of view, it is intended to improve riding comfort and steering stability when driving on a rough road.

【０００６】[0006]

【課題を解決するための手段】本発明は、このような課
題に対して、サスペンションアライメントを変更する手
段を設け、悪路走行時にサスペンションアライメントを
変更するようにしたサスペンション装置を提供するもの
である。SUMMARY OF THE INVENTION The present invention provides a suspension device which is provided with means for changing the suspension alignment so as to change the suspension alignment when running on a rough road. .

【０００７】すなわち、上記課題を解決する第１の手段
は、サスペンションアライメントを変更するアライメン
ト変更手段を備えた自動車のサスペンション装置であっ
て、路面の凹凸状態を検出する悪路検出手段と、上記悪
路検出手段によって検出された路面の凹凸状態に基づい
て、当該路面が基準レベル以上の凹凸を有する悪路であ
るときに、上記アライメント変更手段をキャスタ角が小
さくなるように作動させる制御手段とを備えていること
を特徴とするものである。That is, a first means for solving the above-mentioned problems is a suspension system for an automobile equipped with an alignment changing means for changing the suspension alignment, which is a bad road detecting means for detecting the uneven state of the road surface and the bad road detecting means. Based on the unevenness of the road surface detected by the road detecting means, when the road surface is a rough road having unevenness of a reference level or higher, a control means for operating the alignment changing means to reduce the caster angle. It is characterized by having.

【０００８】上記課題を解決する第２乃至第８の各手段
も、上記第１の手段と同様にアライメント変更手段、悪
路検出手段、及び悪路走行時に当該アライメント変更手
段を作動させる制御手段を備えているが、各々の制御手
段のサスペンションアライメントについての制御内容が
上記第１の手段のそれとは異なる。Similarly to the first means, the second to eighth means for solving the above-mentioned problems also include an alignment changing means, a bad road detecting means, and a control means for operating the alignment changing means at the time of traveling on a bad road. However, the control content of the suspension alignment of each control means is different from that of the first means.

【０００９】具体的には、第２の手段ではキャスタ変化
が小さくなるように制御し、第３の手段ではキングピン
オフセットが大きくなるように制御し、第４の手段では
ホイールセンタオフセットが小さくなるように制御し、
第５の手段ではキャンバ変化が小さくなるように制御
し、第６の手段ではトー変化が小さくなるように制御
し、第７の手段ではトレールが大きくなるように制御
し、第８の手段ではトレールが小さくなるように制御す
る。Specifically, the second means controls the caster change to be small, the third means controls the kingpin offset to increase, and the fourth means controls the wheel center offset to decrease. Control to
The fifth means controls to reduce the camber change, the sixth means controls to reduce the toe change, the seventh means controls to increase the trail, and the eighth means controls the trail. Control to be small.

【００１０】また、上記課題を解決する第９の手段は、
上記第１乃至第８の各手段を発展させてなるものであっ
て、上記制御手段が、上記悪路検出手段によって検出さ
れた路面の凹凸状態に基づいて当該路面状態の悪さのレ
ベルを判定し、該悪路レベルに応じて上記アライメント
変更手段に対する制御量を変更する点に特徴がある。The ninth means for solving the above problems is as follows.
The control means determines the level of badness of the road surface state based on the unevenness of the road surface detected by the bad road detecting means. The feature is that the control amount for the alignment changing means is changed according to the rough road level.

【００１１】[0011]

【作用】上記第１の手段では、キャスタ角が小さくなる
ため、車輪の上下ストロークを稼ぐことができる。よっ
て、悪路走行時に当該車輪が路面の凸部に乗り上げた際
のエネルギー吸収性が良くなって乗り心地の点で有利に
なるとともに、操舵時の車体の沈みもなくなるためロー
ルも抑えられる。In the first means, the caster angle is small, so that the vertical stroke of the wheel can be increased. Therefore, the energy absorption when the wheel rides on the convex portion of the road surface during traveling on a rough road is improved, which is advantageous in terms of riding comfort, and since the sinking of the vehicle body during steering is also eliminated, roll is also suppressed.

【００１２】上記第２の手段にでは、キャスタ変化が小
さくなるため、バンプ時にキャスタ角が大きくならず、
乗り心地の点で有利になる。In the second means, since the caster change is small, the caster angle does not become large during bumping,
It is advantageous in terms of riding comfort.

【００１３】第３の手段では、キングピンオフセットが
大きくなるから、トーイン傾向が強くなり、悪路走行時
において直進安定性が高まる。In the third means, since the kingpin offset becomes large, the toe-in tendency becomes strong, and the straight running stability is improved when traveling on a rough road.

【００１４】第４の手段では、ホイールセンタオフセッ
トが小さくなるから、悪路走行時に車輪に働く上下軸回
りのモーメントが小さくなり、操縦安定性向上の面で有
利になる。According to the fourth means, since the wheel center offset becomes small, the moment about the vertical axis acting on the wheel during traveling on a rough road becomes small, which is advantageous in improving steering stability.

【００１５】第５の手段では、キャンバ変化が小さくな
るから、悪路走行時にキャンバスラストを抑えて操縦安
定性を向上させることができる。According to the fifth means, since the camber change is small, it is possible to suppress the canvas last when driving on a rough road and improve the steering stability.

【００１６】第６の手段では、トー変化が小さくなるか
ら、悪路走行時に片輪がバンプしても車両の進行方向が
乱れず、操縦安定性向上の面で有利になる。In the sixth means, since the toe change is small, the traveling direction of the vehicle is not disturbed even if one wheel bumps when traveling on a bad road, which is advantageous in improving steering stability.

【００１７】第７の手段では、トレールが大きくなるか
ら、悪路走行時、特に車輪が比較的ゆっくり上下動する
ような場合に直進安定性が得られる。In the seventh means, since the trail becomes large, straight running stability can be obtained when traveling on a bad road, especially when the wheels move up and down relatively slowly.

【００１８】第８の手段では、トレールが小さくなる
が、悪路走行時であっても車輪が短い周期で上下動する
ような場合には、トレールを小さくしてエネルギー吸収
性を高める方が乗り心地性の点で有利になる。特に低速
走行時にはセルフアライニングトルクがあまり効かない
ため、トレールは小さくする方がよい。In the eighth means, the trail becomes smaller, but if the wheels move up and down in a short cycle even when traveling on a rough road, it is better to make the trail smaller to improve energy absorption. It is advantageous in terms of comfort. Especially when running at low speed, the self-aligning torque does not work very well, so it is better to make the trail smaller.

【００１９】第９の手段では、悪路検出手段によって検
出された悪路レベルに応じてサスペンションアライメン
トの変更量が異なるものになるから、悪路状態に応じた
過不足のない制御を行なうことが可能になる。In the ninth means, since the amount of change in suspension alignment varies depending on the rough road level detected by the rough road detecting means, it is possible to perform control without excess or deficiency according to the rough road condition. It will be possible.

【００２０】[0020]

【発明の効果】従って、本発明によれば、悪路走行時に
サスペンションアライメントを適宜変更するようにした
から、自動車の乗り心地の向上ないしは操縦安定性の向
上を図ることができる。As described above, according to the present invention, the suspension alignment is appropriately changed when the vehicle is traveling on a rough road, so that it is possible to improve the riding comfort of the automobile or the steering stability.

【００２１】[0021]

【実施例】以下、本発明の実施例を図面に基づいて説明
する。Embodiments of the present invention will be described below with reference to the drawings.

【００２２】図１には自動車のサスペンション装置の機
械的構成が示されている。同図において、１は車輪、２
は車輪１を回転自在に支持するホイールサポート、３は
車体前後方向に配置され前端が車体に、後端がホイール
サポート２の下部にそれぞれ取り付けられた前側縦リン
ク、４は車体前後方向に配置され前端がホイールサポー
ト２の上部に、後端が車体にそれぞれ取り付けられた後
側縦リンク、５は車体左右方向に配置され内端が車体
に、外端がホイールサポート２の上部にそれぞれ取り付
けられた上側横リンク、６は車体左右方向に配置され内
端が車体に、外端がホイールサポート２の下部にそれぞ
れ取り付けられた下側横リンク、７は車体左右方向に配
置され内端がタイロッドに、外端がホイールサポート２
の下部の後側にそれぞれ取り付けられたナックルであ
る。FIG. 1 shows the mechanical construction of a suspension system for an automobile. In the figure, 1 is a wheel, 2
Is a wheel support for rotatably supporting the wheel 1, 3 is a front longitudinal link which is arranged in the vehicle front-rear direction and whose front end is attached to the vehicle body and whose rear end is attached to the lower part of the wheel support 2, 4 is arranged in the vehicle front-rear direction The front end is attached to the upper portion of the wheel support 2, and the rear end is attached to the vehicle body. The rear vertical links 5 are arranged in the vehicle body left-right direction, the inner end is attached to the vehicle body, and the outer end is attached to the upper portion of the wheel support 2. An upper lateral link, 6 is arranged in the lateral direction of the vehicle body, an inner end is attached to the vehicle body, an outer end is a lower lateral link attached to the lower portion of the wheel support 2, and 7 is arranged in the vehicle lateral direction, and an inner end is a tie rod. Outer end is wheel support 2
It is a knuckle attached to the rear side of the lower part of each.

【００２３】上記各リンク３〜６及びナックル７には、
その長さを変更する伸縮手段（シリンダ装置）３ａ〜７
ａが設けられているとともに、各リンク３〜５の車体側
取付点にはそれぞれ取付点の高さを変更する上下動手段
（シリンダ装置）３ｂ〜６ｂが設けられ、ナックルアー
ム７に関しても上下動手段７ｂが設けられている。これ
ら伸縮手段３ａ〜７ａ及び上下動手段３ｂ〜７ｂがサス
ペンションアライメントを変更するアライメント変更手
段を構成している。The links 3 to 6 and the knuckle 7 are
Expansion / contraction means (cylinder device) 3a to 7 for changing the length thereof
a is provided and vertical movement means (cylinder devices) 3b to 6b for changing the height of the attachment points of the links 3 to 5 on the vehicle body side are provided, and the knuckle arm 7 is also moved vertically. Means 7b are provided. These expansion and contraction means 3a to 7a and vertical movement means 3b to 7b constitute an alignment changing means for changing suspension alignment.

【００２４】図２には上記アライメント変更手段を作動
させる制御系が示されている。同図において、８は制御
手段（ＣＰＵ）、９は油圧駆動回路、１０はオイルタン
ク、１１はオイルポンプである。油圧駆動回路９は、制
御手段８からの制御信号に基づいて上記伸縮手段３ａ〜
７ａ及び上下動手段３ｂ〜７ｂを構成する各シリンダ装
置への作動油の供給と排出とを行なう。FIG. 2 shows a control system for operating the alignment changing means. In the figure, 8 is a control means (CPU), 9 is a hydraulic drive circuit, 10 is an oil tank, and 11 is an oil pump. The hydraulic drive circuit 9 is responsive to the control signal from the control means 8 to expand / contract means 3a-
7a and the hydraulic oil is supplied to and discharged from each of the cylinder devices constituting the vertical moving means 3b to 7b.

【００２５】上記制御手段８は、車体に取り付けられた
加速度センサ（悪路検出手段）１２によって検出される
上下加速度Ｇ（路面の凹凸状態）に基づいて、該Ｇが所
定値Ｇ0 以上のときに当該路面は悪路と判定し、上記油
圧駆動回路９に制御信号を出力する。この場合、Ｇ＝Ｇ
0 〜Ｇ1 （但し、Ｇ0 ＜Ｇ1 ）のときに低悪路レベルと
判定し、Ｇ≧Ｇ1 のときに高悪路レベルであると判定
し、高悪路レベルのときは、上記伸縮手段３ａ〜７ａ及
び上下動手段３ｂ〜７ｂの各作動量が１．２倍になるよ
うに制御信号を変更する。また、当該制御手段８は車速
センサ１３によって検出される車速Ｖが所定値Ｖ0 未満
であるときには上記アライメント変更手段の制御を中止
する。The control means 8 is based on the vertical acceleration G (roughness of the road surface) detected by the acceleration sensor (bad road detection means) 12 mounted on the vehicle body, and when the G is equal to or greater than the predetermined value G0. The road surface is determined to be a bad road, and a control signal is output to the hydraulic drive circuit 9. In this case, G = G
When 0 to G1 (however, G0 <G1), it is determined to be a low rough road level, when G ≧ G1, it is determined to be a high rough road level, and when it is a high rough road level, the expansion / contraction means 3a to The control signal is changed so that the respective operation amounts of 7a and the vertical movement means 3b to 7b are 1.2 times. Further, the control means 8 suspends the control of the alignment changing means when the vehicle speed V detected by the vehicle speed sensor 13 is less than the predetermined value V0.

【００２６】上記制御手段８によるアライメント変更手
段の作動の制御について具体的に説明すると、キャスタ
角θを小さくする場合には、図３に示すように、前側縦
リンク３及び後側縦リンク４を伸長させればよい。The control of the operation of the alignment changing means by the control means 8 will be specifically described. In order to reduce the caster angle θ, the front vertical link 3 and the rear vertical link 4 are connected as shown in FIG. It may be extended.

【００２７】キャスタ変化を小さくする場合には、図４
に示すように、後側縦リンク４の取付点を上昇させる、
あるいは当該リンクを伸長させればよい。もちろん、前
側縦リンク３を動かしてもよく、さらに、前側及び後側
の両縦リンク３，４を動かすようにしてもよい。If the caster change is to be made small, then FIG.
As shown in, raise the attachment point of the rear vertical link 4,
Alternatively, the link may be expanded. Of course, the front vertical link 3 may be moved, and further both the front and rear vertical links 3 and 4 may be moved.

【００２８】キャンバ変化を小さくするには、図５に示
すように、上側横リンク５のホイールサポート側取付点
よりも低位置にある車体側取付点を上昇させて、当該リ
ンク５を水平にすればよい。In order to reduce the camber change, as shown in FIG. 5, the attachment point on the vehicle body side, which is lower than the attachment point on the wheel support side of the upper lateral link 5, is raised to slide the link 5 horizontally. Good.

【００２９】トレールｔを大きくするには、図６に示す
ように、前側縦リンク３を短縮させればよい。一方、ト
レールｔを小さくするには、当該前側縦リンク３を伸長
させればよい。In order to increase the trail t, the front vertical link 3 may be shortened as shown in FIG. On the other hand, in order to reduce the trail t, the front vertical link 3 may be extended.

【００３０】トー変化を小さくするには、下側横リンク
６の車体側取付点を左右動させる左右動手段を設けて、
図７に示すように、上側横リンク５、下側横リンク６及
びナックル７の各内端が平面視において互いに一直線に
並ぶようにすればよい。In order to reduce the toe change, a horizontal movement means for moving the attachment point of the lower lateral link 6 on the vehicle body side is provided,
As shown in FIG. 7, the inner ends of the upper lateral link 5, the lower lateral link 6, and the knuckle 7 may be aligned with each other in a plan view.

【００３１】キングピンオフセットＬを大きくするに
は、下側横リンク６の車体側取付点を前後動させる前後
動手段を設けて、図８に示すように、当該取付点を前後
動させることにより、下側横リンク６の車体外方への延
長線と前側縦リンク３の車体外方への延長線との平面視
での交点Ｏ1 を車体外方のＯ2 へずらすようにすればよ
い。すなわち、図９に示すように、この場合のキングピ
ン軸Ｋは、上記交点Ｏ2と、後側縦リンク４の車体外方
への延長線と上側横リンク５の車体外方への延長線との
平面視での交点Ｐとを結ぶ線上に位置するが、上記交点
Ｏ1 がＯ2 へずれることにより、キングピンオフセット
Ｌが大きくなる。なお、前側縦リンク３の車体側取付点
を左右動させる手段を設け、該取付点を左右動させるこ
とによって上記交点を移動させるようにすることもでき
る。In order to increase the kingpin offset L, a forward / backward moving means for moving the attachment point of the vehicle body side of the lower lateral link 6 back and forth is provided, and as shown in FIG. The intersection O1 in plan view of the extension line of the lower lateral link 6 toward the outside of the vehicle body and the extension line of the front vertical link 3 to the outside of the vehicle body may be shifted to O2 outside the vehicle body. That is, as shown in FIG. 9, the kingpin axis K in this case is defined by the intersection O2, the extension line of the rear vertical link 4 to the outside of the vehicle body, and the extension line of the upper lateral link 5 to the outside of the vehicle body. Although it is located on the line connecting the intersection P in a plan view, the kingpin offset L becomes large due to the displacement of the intersection O1 to O2. It is also possible to provide a means for moving the attachment point of the front vertical link 3 on the vehicle body side to the left and right, and to move the attachment point by moving the attachment point to the left and right.

【００３２】ホイールセンタオフセットＳを小さくする
には、上側横リンク５の車体側取付点を前後動させる手
段あるいは後側縦リンク４を左右動させる手段を設け、
先の交点Ｏ1 →Ｏ2 の移動の場合と同様にして、図１０
に示すように、後側縦リンク４の車体外方への延長線と
上側横リンク５の車体外方への延長線との平面視での交
点Ｐ1 を車体外方のＰ2 へずらせばよい。In order to reduce the wheel center offset S, means for moving the attachment point of the upper horizontal link 5 on the vehicle body side forward or backward or means for moving the rear vertical link 4 left and right,
As in the case of moving the intersection point O1 → O2, as shown in FIG.
As shown in, the intersection P1 in plan view between the extension line of the rear vertical link 4 to the outside of the vehicle body and the extension line of the upper lateral link 5 to the outside of the vehicle body may be shifted to P2 outside the vehicle body.

【００３３】図１１は悪路走行時にサスペンションアラ
イメントを変化させる制御例としてキャスタ角を変化さ
せる場合を示す。制御を開始し、車速Ｖが所定値Ｖ0 以
上であり、且つ上下加速度Ｇが所定値Ｇ0 〜Ｇ1 であれ
ば、キャスタ角θが小さいθ0 となるように変更される
（ステップＳ１〜Ｓ４）。一方、上下加速度Ｇが所定値
Ｇ1 以上であれば、キャスタ角θがθ1 （但し、θ1 ＜
θ0 ）となるように変更されることになる（ステップＳ
３→Ｓ５）。FIG. 11 shows a case where the caster angle is changed as an example of control for changing the suspension alignment when running on a rough road. When the control is started and the vehicle speed V is equal to or higher than the predetermined value V0 and the vertical acceleration G is the predetermined values G0 to G1, the caster angle θ is changed to a small θ0 (steps S1 to S4). On the other hand, if the vertical acceleration G is greater than or equal to the predetermined value G1, the caster angle θ is θ1 (where θ1 <
θ 0) (step S
3 → S5).

【００３４】他のサスペンションアライメントの変更の
場合も同様の制御の流れになる。もちろん、先に説明し
た全てのサスペンションアライメントの変更を実行する
ようにしてもよい。The same control flow is used for other suspension alignment changes. Of course, all the suspension alignment changes described above may be executed.

【００３５】なお、上記実施例では悪路検出手段とし
て、加速度センサを採用したが、光センサや超音波セン
サを利用してもよい。加速度センサを用いる場合、基準
値以上の上下加速度が単位時間当たりに所定回数以上検
出されたときに悪路と判定するようにしてもよい。Although the acceleration sensor is used as the bad road detecting means in the above embodiment, an optical sensor or an ultrasonic sensor may be used. When an acceleration sensor is used, a rough road may be determined when vertical acceleration equal to or higher than the reference value is detected a predetermined number of times or more per unit time.

【００３６】また、リンク及びアームの長さや位置を変
更する駆動手段としては、シリンダ装置に限らず、電動
モータを使用してもよい。The drive means for changing the lengths and positions of the links and arms is not limited to the cylinder device, but an electric motor may be used.

【図面の簡単な説明】[Brief description of drawings]

【図１】自動車のサスペンション装置の機械的構成を示
す斜視図FIG. 1 is a perspective view showing a mechanical configuration of a vehicle suspension device.

【図２】アライメント変更手段を作動させる制御系を示
す構成図FIG. 2 is a configuration diagram showing a control system that operates an alignment changing unit.

【図３】キャスタ角が小さくなるアライメント変更態様
を示す概略側面図FIG. 3 is a schematic side view showing an alignment change mode in which the caster angle is reduced.

【図４】キャスタ変化が小さくなるアライメント変更態
様を示す概略側面図FIG. 4 is a schematic side view showing an alignment change mode in which a caster change is reduced.

【図５】キャンバ変化を小さくなるアライメント変更態
様を示す概略正面図FIG. 5 is a schematic front view showing an alignment changing mode in which a camber change is reduced.

【図６】トレールが大きくなるアライメント変更態様を
示す概略側面図FIG. 6 is a schematic side view showing an alignment changing mode in which the trail becomes large.

【図７】トー変化が小さくなるアライメント変更態様を
示す概略平面図FIG. 7 is a schematic plan view showing an alignment changing mode in which the toe change becomes small.

【図８】キングピンオフセットが大きくなるアライメン
ト変更態様を示す概略平面図FIG. 8 is a schematic plan view showing an alignment changing mode in which the kingpin offset becomes large.

【図９】キングピンオフセットが大きくなるアライメン
ト変更態様を示す概略正面図FIG. 9 is a schematic front view showing an alignment changing mode in which the kingpin offset becomes large.

【図１０】ホイールセンタオフセットが小さくなるアラ
イメント変更態様を示す概略平面図FIG. 10 is a schematic plan view showing an alignment change mode in which the wheel center offset becomes small.

【図１１】悪路走行時にサスペンションアライメントを
変化させる制御のフロー図FIG. 11 is a flow chart of control for changing suspension alignment when driving on a rough road.

【符号の説明】[Explanation of symbols]

１ 車輪 ２ ホイールサポート ３ 前側縦リンク ４ 後側縦リンク ５ 上側横リンク ６ 下側横リンク ７ ナックルアーム ３ａ〜７ａ，３ｂ〜７ｂ アライメント変更手段 ８ 制御手段 １２ 加速度センサ（悪路検出手段） 1 Wheel 2 Wheel Support 3 Front Vertical Link 4 Rear Vertical Link 5 Upper Horizontal Link 6 Lower Horizontal Link 7 Knuckle Arm 3a-7a, 3b-7b Alignment Change Means 8 Control Means 12 Accelerometer (Rough Road Detection Means)

───────────────────────────────────────────────────── フロントページの続き (72)発明者 牛尾 晃一 広島県安芸郡府中町新地３番１号 マツダ 株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koichi Ushio 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Motor Corporation

Claims (9)

【特許請求の範囲】[Claims] 【請求項１】 サスペンションアライメントを変更する
アライメント変更手段を備えた自動車のサスペンション
装置において、 路面の凹凸状態を検出する悪路検出手段と、 上記悪路検出手段によって検出された路面の凹凸状態に
基づいて、当該路面が基準レベル以上の凹凸を有する悪
路であるときに、上記アライメント変更手段をキャスタ
角が小さくなるように作動させる制御手段とを備えてい
ることを特徴とする自動車のサスペンション装置。1. A suspension device for an automobile, comprising an alignment changing means for changing suspension alignment, based on a rough road detecting means for detecting a bumpy condition of a road surface, and a bumpy condition of a road surface detected by said bad road detecting means. And a control means for operating the alignment changing means so as to reduce the caster angle when the road surface is a rough road having unevenness of a reference level or higher. 【請求項２】 サスペンションアライメントを変更する
アライメント変更手段を備えた自動車のサスペンション
装置において、 路面の凹凸状態を検出する悪路検出手段と、 上記悪路検出手段によって検出された路面の凹凸状態に
基づいて、当該路面が基準レベル以上の凹凸を有する悪
路であるときに、上記アライメント変更手段をキャスタ
変化が小さくなるように作動させる制御手段とを備えて
いることを特徴とする自動車のサスペンション装置。2. A suspension device for an automobile, comprising an alignment changing means for changing suspension alignment, based on a rough road detecting means for detecting a bumpy condition of a road surface, and a bumpy condition of a road surface detected by said bad road detecting means. And a control means for operating the alignment changing means so as to reduce the caster change when the road surface is a rough road having unevenness of a reference level or higher. 【請求項３】 サスペンションアライメントを変更する
アライメント変更手段を備えた自動車のサスペンション
装置において、 路面の凹凸状態を検出する悪路検出手段と、 上記悪路検出手段によって検出された路面の凹凸状態に
基づいて、当該路面が基準レベル以上の凹凸を有する悪
路であるときに、上記アライメント変更手段をキングピ
ンオフセットが大きくなるように作動させる制御手段と
を備えていることを特徴とする自動車のサスペンション
装置。3. A suspension device for an automobile, comprising an alignment changing means for changing suspension alignment, based on a rough road detecting means for detecting an uneven condition of a road surface, and a rough surface condition of the road detected by said bad road detecting means. And a control means for operating the alignment changing means so as to increase the kingpin offset when the road surface is a rough road having unevenness of a reference level or higher. 【請求項４】 サスペンションアライメントを変更する
アライメント変更手段を備えた自動車のサスペンション
装置において、 路面の凹凸状態を検出する悪路検出手段と、 上記悪路検出手段によって検出された路面の凹凸状態に
基づいて、当該路面が基準レベル以上の凹凸を有する悪
路であるときに、上記アライメント変更手段をホイール
センタオフセットが小さくなるように作動させる制御手
段とを備えていることを特徴とする自動車のサスペンシ
ョン装置。4. A suspension device for an automobile, comprising an alignment changing means for changing suspension alignment, based on a rough road detecting means for detecting a rough surface condition of a road surface, and a rough surface condition of the road surface detected by the rough road detecting means. And a control means for operating the alignment changing means so as to reduce the wheel center offset when the road surface is a rough road having unevenness of a reference level or higher. . 【請求項５】 サスペンションアライメントを変更する
アライメント変更手段を備えた自動車のサスペンション
装置において、 路面の凹凸状態を検出する悪路検出手段と、 上記悪路検出手段によって検出された路面の凹凸状態に
基づいて、当該路面が基準レベル以上の凹凸を有する悪
路であるときに、上記アライメント変更手段をキャンバ
変化が小さくなるように作動させる制御手段とを備えて
いることを特徴とする自動車のサスペンション装置。5. A vehicle suspension device comprising an alignment changing means for changing suspension alignment, wherein a rough road detecting means for detecting an uneven state of a road surface, and a rough surface state of the road surface detected by the bad road detecting means are used. And a control unit that operates the alignment changing unit so that the change in camber is small when the road surface is a rough road having unevenness of a reference level or higher. 【請求項６】 サスペンションアライメントを変更する
アライメント変更手段を備えた自動車のサスペンション
装置において、 路面の凹凸状態を検出する悪路検出手段と、 上記悪路検出手段によって検出された路面の凹凸状態に
基づいて、当該路面が基準レベル以上の凹凸を有する悪
路であるときに、上記アライメント変更手段をトー変化
が小さくなるように作動させる制御手段とを備えている
ことを特徴とする自動車のサスペンション装置。6. A vehicle suspension device comprising an alignment changing means for changing suspension alignment, based on a rough road detecting means for detecting a rough surface condition of a road surface, and a rough surface condition of a road surface detected by the rough road detecting means. And a control means for operating the alignment changing means so as to reduce the toe change when the road surface is a rough road having unevenness of a reference level or higher. 【請求項７】 サスペンションアライメントを変更する
アライメント変更手段を備えた自動車のサスペンション
装置において、 路面の凹凸状態を検出する悪路検出手段と、 上記悪路検出手段によって検出された路面の凹凸状態に
基づいて、当該路面が基準レベル以上の凹凸を有する悪
路であるときに、上記アライメント変更手段をトレール
が大きくなるように作動させる制御手段とを備えている
ことを特徴とする自動車のサスペンション装置。7. A suspension device for an automobile, comprising an alignment changing means for changing suspension alignment, based on a rough road detecting means for detecting a rough surface condition of a road surface, and a rough surface condition of a road surface detected by the rough road detecting means. And a control means for activating the alignment changing means so that the trail becomes larger when the road surface is a rough road having unevenness of a reference level or higher. 【請求項８】 サスペンションアライメントを変更する
アライメント変更手段を備えた自動車のサスペンション
装置において、 路面の凹凸状態を検出する悪路検出手段と、 上記悪路検出手段によって検出された路面の凹凸状態に
基づいて、当該路面が基準レベル以上の凹凸を有する悪
路であるときに、上記アライメント変更手段をトレール
が小さくなるように作動させる制御手段とを備えている
ことを特徴とする自動車のサスペンション装置。8. A suspension device for an automobile, comprising an alignment changing means for changing suspension alignment, based on a rough road detecting means for detecting an uneven condition of a road surface, and a rough surface condition of the road detected by the bad road detecting means. And a control unit that operates the alignment changing unit so that the trail becomes smaller when the road surface is a rough road having unevenness of a reference level or higher. 【請求項９】 上記制御手段は、上記悪路検出手段によ
って検出された路面の凹凸状態に基づいて当該路面状態
の悪さのレベルを判定し、該悪路レベルに応じて上記ア
ライメント変更手段に対する制御量を変更する請求項１
乃至請求項８のいずれか一つに記載の自動車のサスペン
ション装置。9. The control means determines the level of badness of the road surface state based on the unevenness of the road surface detected by the bad road detecting means, and controls the alignment changing means according to the bad road level. Claim 1 which changes quantity
A suspension device for an automobile according to claim 8.
JP7344393A 1993-03-31 1993-03-31 Suspension device for automobile Withdrawn JPH06286447A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7344393A JPH06286447A (en) 1993-03-31 1993-03-31 Suspension device for automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7344393A JPH06286447A (en) 1993-03-31 1993-03-31 Suspension device for automobile

Publications (1)

Publication Number Publication Date
JPH06286447A true JPH06286447A (en) 1994-10-11

Family

ID=13518385

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7344393A Withdrawn JPH06286447A (en) 1993-03-31 1993-03-31 Suspension device for automobile

Country Status (1)

Country Link
JP (1) JPH06286447A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1795384A1 (en) * 2005-12-12 2007-06-13 Ford Global Technologies, LLC A vehicle wheel suspension assembly
JP2009073377A (en) * 2007-09-21 2009-04-09 Equos Research Co Ltd Control device
JP2009073349A (en) * 2007-09-20 2009-04-09 Equos Research Co Ltd Control device
JP2009529449A (en) * 2006-03-09 2009-08-20 ソシエテ ド テクノロジー ミシュラン Vehicle equipped with variable camber suspension system
EP2216190A1 (en) * 2009-02-10 2010-08-11 Honda Motor Co., Ltd. Rear wheel steering control system
WO2016058060A1 (en) * 2014-10-14 2016-04-21 Reybrouck Consulting & Innovation Bvba Wheel suspension
WO2019078120A1 (en) * 2017-10-19 2019-04-25 日本精工株式会社 Suspension
WO2019078119A1 (en) * 2017-10-19 2019-04-25 日本精工株式会社 Extendible-contractible link and suspension
WO2019111534A1 (en) * 2017-12-04 2019-06-13 日本精工株式会社 Extending and contracting link and suspension
US10829155B2 (en) 2017-10-19 2020-11-10 Nsk Ltd. Suspension operation system and suspension operation terminal

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7537223B2 (en) 2005-12-12 2009-05-26 Ford Global Technologies, Llc Vehicle wheel suspension assembly
EP1795384A1 (en) * 2005-12-12 2007-06-13 Ford Global Technologies, LLC A vehicle wheel suspension assembly
JP2009529449A (en) * 2006-03-09 2009-08-20 ソシエテ ド テクノロジー ミシュラン Vehicle equipped with variable camber suspension system
JP2009073349A (en) * 2007-09-20 2009-04-09 Equos Research Co Ltd Control device
JP2009073377A (en) * 2007-09-21 2009-04-09 Equos Research Co Ltd Control device
EP2216190A1 (en) * 2009-02-10 2010-08-11 Honda Motor Co., Ltd. Rear wheel steering control system
JP2010184518A (en) * 2009-02-10 2010-08-26 Honda Motor Co Ltd Rear wheel steering control system
US8670900B2 (en) 2009-02-10 2014-03-11 Honda Motor Co., Ltd. Rear wheel steering control system
US10518600B2 (en) 2014-10-14 2019-12-31 Reybrouck Consulting & Innovation Bvba Wheel suspension
WO2016058060A1 (en) * 2014-10-14 2016-04-21 Reybrouck Consulting & Innovation Bvba Wheel suspension
BE1022561B1 (en) * 2014-10-14 2016-06-02 Reybrouck Consulting & Innovation Bvba Wheel suspension
WO2019078120A1 (en) * 2017-10-19 2019-04-25 日本精工株式会社 Suspension
JPWO2019078120A1 (en) * 2017-10-19 2019-11-14 日本精工株式会社 suspension
WO2019078119A1 (en) * 2017-10-19 2019-04-25 日本精工株式会社 Extendible-contractible link and suspension
CN111247011A (en) * 2017-10-19 2020-06-05 日本精工株式会社 Telescopic link and suspension
US10829155B2 (en) 2017-10-19 2020-11-10 Nsk Ltd. Suspension operation system and suspension operation terminal
US10940730B2 (en) 2017-10-19 2021-03-09 Nsk Ltd. Extension-retraction link and suspension
CN111247011B (en) * 2017-10-19 2022-12-27 日本精工株式会社 Telescopic link and suspension
WO2019111534A1 (en) * 2017-12-04 2019-06-13 日本精工株式会社 Extending and contracting link and suspension
CN111356599A (en) * 2017-12-04 2020-06-30 日本精工株式会社 Telescopic link and suspension
CN111356599B (en) * 2017-12-04 2023-06-09 日本精工株式会社 Expansion link and suspension

Similar Documents

Publication Publication Date Title
US5498018A (en) Wheel suspension
JP4821454B2 (en) Vehicle travel control device
JP2001055034A (en) Automobile with system for controlling camber of wheel in curve
JP2009035081A (en) Control system
JP2002542975A (en) Wheel suspension for front axle of automobile
JP3476972B2 (en) Rear wheel steering device
CN103722997B (en) The torque beam suspension of vehicle
JP2518349B2 (en) Rear suspension for vehicles
JPH06286447A (en) Suspension device for automobile
JPH05162518A (en) Suspension device for vehicle
JPS5848366B2 (en) Automotive rear wheel suspension system
JPH1142918A (en) Suspension device
JPH10218008A (en) Toe angle control device for vehicle
JP2009234518A (en) Variable alignment angle vehicle
JP2569714B2 (en) Rear suspension for vehicles
JPS63199181A (en) Wheel suspension system for steerable rear wheel of automobile, particularly, passenger car, with front wheel steering gear
JP2007518613A (en) Method and apparatus for suspending a vehicle
JP2005506922A (en) Method and apparatus for suspending a vehicle wheel assembly
JP3083305B2 (en) Independent suspension
KR100507096B1 (en) Suspension system for vehicles
KR100394631B1 (en) A wheel alignment for vehicles
JP3209467B2 (en) Rear wheel suspension device for automobile
KR101448796B1 (en) Suspension system for vehicles
JPH0358945B2 (en)
CN101817292A (en) Wheel suspension device for automobile front wheel

Legal Events

Date Code Title Description
A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 20000704