JPH02182529A - Suspension control device - Google Patents

Suspension control device

Info

Publication number
JPH02182529A
JPH02182529A JP136089A JP136089A JPH02182529A JP H02182529 A JPH02182529 A JP H02182529A JP 136089 A JP136089 A JP 136089A JP 136089 A JP136089 A JP 136089A JP H02182529 A JPH02182529 A JP H02182529A
Authority
JP
Japan
Prior art keywords
wheel
pressure
front wheel
vehicle
hydraulic
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.)
Pending
Application number
JP136089A
Other languages
Japanese (ja)
Inventor
Takashi Imazeki
隆志 今関
Fukashi Sugasawa
菅沢 深
Masatsugu Yokote
正継 横手
Toshihiro Yamamura
智弘 山村
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP136089A priority Critical patent/JPH02182529A/en
Publication of JPH02182529A publication Critical patent/JPH02182529A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/80Interactive suspensions; arrangement affecting more than one suspension unit

Landscapes

  • Vehicle Body Suspensions (AREA)

Abstract

PURPOSE:To obtain a desired distribution of roll rigidity without causing any change in the posture of a vehicle by dividing a liquid pressure control system into two lines of the left front wheel/right rear wheel and the right front wheel/ left front wheel, and so constructing that the increase and decrease of pressure of the same value will be applied simultaneously to these control lines. CONSTITUTION:On each wheel 11FL-11RR, oil hydraulic cylinders 10(10FL-10RR), the upper end of which are connected to a car body 12 side, are installed. Ports 10a of each oil hydraulic cylinder 10 of the left front wheel and right rear wheel are communicated with an oil passage 14, and ports 10a of oil hydraulic cylinders 10 of the right front wheel and left rear wheel are communicated with an oil passage 15. Accumulators 16, 17 are installed on each oil passage 14, 15, and a variable hydraulic cylinder 18 is inserted between oil passages 14, 15. The variable hydraulic cylinder 18 is so constructed that the hydraulic pressure of hydraulic pressure chambers 18b, 18c can be adjusted with the stroke of a piston 18a, and that the hydraulic pressure of one of two hydraulic pressure control lines can be increased while that of the other can be reduced simultaneously by the same pressure value.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は流体圧シリンダに供給する流体圧を調整するこ
とにより、車両の姿勢変化を生ずることな(ロール剛性
配分を変更できるようにしたサスペンション制御装置に
関するものである。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention provides a suspension system that can change the roll stiffness distribution without causing a change in the attitude of the vehicle by adjusting the fluid pressure supplied to the fluid pressure cylinder. This relates to a control device.

(従来の技術) この種の従来のサスペンション制御装置としては、例え
ば本願出願人が先に出願した特開昭62−289420
号公報に記載されたものがある。
(Prior Art) As a conventional suspension control device of this type, for example, Japanese Patent Laid-Open No. 62-289420, which was previously filed by the applicant of the present application,
There is something described in the No.

この装置は各車輪と車体との間に流体圧シリンダを設け
、これら流体圧シリンダに供給する流体圧を調整する流
体圧アクチュエータを各輪個別に設けたものであり、各
流体圧アクチュエータを圧力制御装置により車両の走行
状態に応じて夫々独立に制御することにより、所望の車
両特性(例えばロール剛性配分)を得るものである。
This device has a fluid pressure cylinder between each wheel and the vehicle body, and a fluid pressure actuator for each wheel that adjusts the fluid pressure supplied to these fluid pressure cylinders.The pressure of each fluid pressure actuator is controlled. Desired vehicle characteristics (for example, roll stiffness distribution) are obtained by independently controlling each vehicle according to the running state of the vehicle using the device.

(発明が解決しようとする課題) しかしながら上述した従来のサスペンション制御装置は
、各輪独立に制御が可能であるという利点を有する反面
、各輪に夫々流体圧アクチュエータを設けたためシステ
ム構成が複雑化してコストアップを招くという問題があ
った。
(Problem to be Solved by the Invention) However, while the conventional suspension control device described above has the advantage of being able to control each wheel independently, it has a complicated system configuration because each wheel is provided with a fluid pressure actuator. There was a problem in that it led to an increase in costs.

本発明は流体圧制御系を左前輪・右後輪系と右前輪・左
後輪系との2系統に分割し、これら制御系に対し同一圧
力値の増圧および減圧を同時に実行することにより上述
した問題を解決することを目的とする。
The present invention divides the fluid pressure control system into two systems, the left front wheel/right rear wheel system and the right front wheel/left rear wheel system, and simultaneously increases and decreases the same pressure value for these control systems. The purpose is to solve the above-mentioned problems.

(課題を解決するための手段) この目的のため本発明のサスペンション制御装置は、各
車輪と車体との間に流体圧シリンダを設けたサスペンシ
ョン装置において、車両の走行状態を検出する走行状態
検出手段と、左前輪および右後輪の流体圧シリンダ間を
連通ずる第1の圧力系統と、右前輪および左後輪の流体
圧シリンダ間を連通ずる第2の圧力系統と、前記第1お
よび第2の圧力系統間に設けた流体圧アクチュエータと
、検出された走行状態に基づき、前記流体圧アクチュエ
ータにより前記第1および第2の圧力系統の流体圧の一
方を増圧すると同時に、他方を同一圧力値だけ減圧する
圧力制御手段とを具えて成ることを特徴とするものであ
り、この場合例えば前記走行状態検出手段は、車両の走
行状態として車両の横方向Gまたは横方向G相当量を検
出するものとする。
(Means for Solving the Problems) For this purpose, the suspension control device of the present invention provides a running state detection means for detecting the running state of the vehicle in a suspension device in which a fluid pressure cylinder is provided between each wheel and the vehicle body. a first pressure system communicating between the fluid pressure cylinders of the front left wheel and the rear right wheel; a second pressure system communicating between the fluid pressure cylinders of the front right wheel and the rear left wheel; a fluid pressure actuator provided between the pressure systems; and based on the detected running state, the fluid pressure actuator increases one of the fluid pressures of the first and second pressure systems, and simultaneously increases the other fluid pressure to the same pressure value. In this case, for example, the running state detecting means detects the lateral G of the vehicle or the amount equivalent to the lateral G as the running state of the vehicle. shall be.

(作 用) 車両走行中走行状態検出手段は車両の走行状態、例えば
車両の横方向Gまたは横方向G相当量を検出している。
(Function) While the vehicle is running, the running state detection means detects the running state of the vehicle, for example, the lateral G of the vehicle or the amount equivalent to the lateral G.

ところで本発明のサスペンション制御装置は、各輪に設
けた流体圧シリンダに対する制御系を左前輪・右後輪系
と右前輪・左後輪系とに2分割するため、左前輪および
右後輪の流体圧シリンダ間を連通して第1の圧力系統と
なし、右前輪および左後輪の流体圧シリンダ間を連通し
て第2の圧力系統となし、第1および第2の圧力系統間
に流体圧アクチュエータを設けて成るものであり、この
流体圧アクチュエータにより圧力制御手段が第1および
第2の圧力系統の流体圧を制御するものである。
By the way, in the suspension control device of the present invention, the control system for the fluid pressure cylinder provided in each wheel is divided into two parts: a left front wheel/right rear wheel system and a right front wheel/left rear wheel system. Fluid pressure cylinders are connected to each other to form a first pressure system, fluid pressure cylinders for the right front wheel and left rear wheel are connected to each other to form a second pressure system, and fluid is connected to each other between the first and second pressure systems. A pressure actuator is provided, and the pressure control means controls the fluid pressure of the first and second pressure systems by the fluid pressure actuator.

したがって旋回走行時等車両特性(例えばロール剛性配
分)を変更する必要が生じるような走行状態においては
、圧力制御手段は前記流体圧アクチュエータにより、検
出された走行状態に基づき前記第1および第2の圧力系
統の流体圧の一方を増圧すると同時に、他方を同一圧力
値だけ減圧する圧力制御を行う。
Therefore, in a running state where it is necessary to change the vehicle characteristics (for example, roll stiffness distribution) such as during cornering, the pressure control means uses the fluid pressure actuator to control the first and second pressure control means based on the detected running state. Pressure control is performed to increase one of the fluid pressures in the pressure system while simultaneously decreasing the other by the same pressure value.

これにより車両の姿勢変化を生ずることなく所望のロー
ル剛性配分を得ることが可能なサスペンション制御装置
を極めて簡単な構成で実現することができ、システムの
大幅なコストダウンを達成することができる。
As a result, a suspension control device capable of obtaining a desired roll stiffness distribution without causing a change in the posture of the vehicle can be realized with an extremely simple configuration, and a significant cost reduction of the system can be achieved.

(実施例) 以下、本発明の実施例を図面に基づき詳細に説明する。(Example) Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

第1図は本発明のサスペンション制御装置の第1実施例
の構成を示す線図であり、この例では流体圧シリンダと
して油圧シリンダl0FL、 l0FR。
FIG. 1 is a diagram showing the configuration of a first embodiment of the suspension control device of the present invention, and in this example, hydraulic cylinders 10FL and 10FR are used as the fluid pressure cylinders.

10RL、 l0RRを用いる。10RL and 10RR are used.

油圧シリンダl0FL、 l0PR,l0RL、 l0
RRは図示下端を車輪11FL、 IIFR,IIRL
、 IIRR側に支持されるとともに図示上端を車体1
2側に支持されるように装着する。これら油圧シリンダ
は、並列に装着したサススプリング13とともに車輪1
1FL、 IIFR,11RL、 IIRRを夫々独立
懸架する。
Hydraulic cylinder l0FL, l0PR, l0RL, l0
RR indicates the lower end of the diagram as wheels 11FL, IIFR, IIRL.
, is supported on the IIRR side and the upper end of the figure is connected to the vehicle body 1.
Attach it so that it is supported on the second side. These hydraulic cylinders are connected to the wheels 1 together with the suspension springs 13 installed in parallel.
1FL, IIFR, 11RL, and IIRR are each independently suspended.

左前輪の油圧シリンダl0FLおよび右後輪の油圧シリ
ンダl0RRのポート108間を油路14により連通し
、右前輪の油圧シリンダl0PRおよび左後輪の油圧シ
リンダl0RLのポート10a間を油路15により連通
ずる。これら油路14.15に夫々アキュムレータ16
、17を設け、さらに油路14.15間に油圧可変シリ
ンダ18を介装する。
An oil passage 14 communicates between the port 108 of the hydraulic cylinder l0FL of the left front wheel and the hydraulic cylinder l0RR of the right rear wheel, and an oil passage 15 communicates between the port 10a of the hydraulic cylinder l0PR of the right front wheel and the hydraulic cylinder l0RL of the left rear wheel. It goes through. Accumulators 16 are installed in these oil passages 14 and 15, respectively.
, 17 are provided, and a variable hydraulic cylinder 18 is further interposed between the oil passages 14 and 15.

油圧可変シリンダ18はピストン18aがストロークす
ることにより油圧室18bおよび18cの油圧を調整し
て各油圧制御系の油圧pm 、 P、を制御するもので
ある。すなわち、ピストン18aが図示の中立位置のと
きPA、 P、を中立圧P0に保持しくPA =pm 
==po ) 、図示下方にストロークすると油路14
の油圧PAを高める( PA=Po +AP)と同時に
、油路15の油圧P、を低下させる(P8=P0−AP
)。一方、図示上方にストロークした場合には逆に油圧
PA 、 P+はPA=Po  ap、 Pi+=Po
+JPとなる。なおこのサスペンションの油圧制御系は
左前輪・右後輪系(油圧シリンダ10PL、 l0RR
,サススプリング13、油路14、アキュムレータ16
および油圧室18b)と右前輪・左後輪系(油圧シリン
ダl0PR,l0RL、サススプリング13、油路15
、アキュムレータ17および油圧室18c)との2系統
にまとめられている。
The variable hydraulic cylinder 18 controls the hydraulic pressures pm and P of each hydraulic control system by adjusting the hydraulic pressures in the hydraulic chambers 18b and 18c by the stroke of the piston 18a. That is, when the piston 18a is at the neutral position shown in the figure, PA, P, should be maintained at the neutral pressure P0 and PA = pm.
==po), oil passage 14 when stroked downward as shown in the figure.
At the same time, the hydraulic pressure P of the oil passage 15 is decreased (P8=P0-AP).
). On the other hand, when the stroke is upward in the figure, the oil pressure PA, P+ is PA=Po ap, Pi+=Po
+JP. The hydraulic control system for this suspension is for the left front wheel and right rear wheel system (hydraulic cylinders 10PL, 10RR).
, suspension spring 13, oil passage 14, accumulator 16
and hydraulic chamber 18b) and right front wheel/left rear wheel system (hydraulic cylinders l0PR, l0RL, suspension spring 13, oil passage 15
, an accumulator 17, and a hydraulic chamber 18c).

上記ピストン18aのストロークを制御するために設け
たモータ19およびウオームギア20は、油圧可変シリ
ンダ18とともに流体圧アクチュエータを構成する。す
なわち、モータ回転をウオームギア20に伝達すると、
その回転数および回転方向に応じてピストン18aが図
示上下方向に移動するから、前述した油圧PA、Pgの
制御を実行することができる。
The motor 19 and worm gear 20 provided to control the stroke of the piston 18a together with the variable hydraulic cylinder 18 constitute a fluid pressure actuator. That is, when the motor rotation is transmitted to the worm gear 20,
Since the piston 18a moves vertically in the drawing according to its rotational speed and direction, the above-described control of the oil pressures PA and Pg can be executed.

上記モータ19の回転数および回転方向を制御するため
コントローラ21を設け、コントローラ21には車輪毎
に設けた車輪速センサ22.23.24.25より夫々
左前輪、右前輪、左後輪、右後輪に対応する車輪回転数
Wll+ WRZ+ W113+ W114を表わす信
号を人力する。なお車輪速センサを前輪または後輪の一
方のみに設けて左右輪の回転数WllI+ l’1ll
12またはW113+ WN2を表わす信号を入力する
ようにしてもよい。
A controller 21 is provided to control the rotation speed and rotation direction of the motor 19, and the controller 21 uses wheel speed sensors 22, 23, 24, and 25 provided for each wheel to control the left front wheel, right front wheel, left rear wheel, and right front wheel, respectively. A signal representing the wheel rotation speed Wll+WRZ+W113+W114 corresponding to the rear wheels is manually generated. In addition, if a wheel speed sensor is installed only on one of the front wheels or the rear wheels, the rotation speed of the left and right wheels WllI+l'1ll
12 or W113+WN2 may be input.

コントローラ21は第3図の制御プログラムを実行して
本発明のサスペンション制御を行う。
The controller 21 executes the control program shown in FIG. 3 to perform the suspension control of the present invention.

すなわちまずステップ101で車輪速センサ22゜23
、24.25より車輪回転数WRI+ Wll!+ W
Ill++WR4を読込み、次のステップ102でこれ
ら車輪回転数WR1+ W11□(またはW++z、L
a)より左右前輪の回転数差W*+  Wiz (また
は左右後輪の回転数差L3W*4)を演算する。なおこ
こで前輪の場合をカッコ外、後輪の場合をカッコ内に表
わす。
That is, first in step 101, the wheel speed sensors 22 and 23 are
, 24. From 25, the wheel rotation speed WRI+ Wll! +W
Ill++WR4 is read, and in the next step 102 these wheel rotational speeds WR1+ W11□ (or W++z, L
From a), the rotational speed difference W*+ Wiz between the left and right front wheels (or the rotational speed difference L3W*4 between the left and right rear wheels) is calculated. Note that the case of the front wheel is shown outside the parentheses, and the case of the rear wheel is shown in the parentheses.

ステップ103ではこの回転数差W+++  Wiz 
(またはWiz  WN4)および旋回半径、車両諸元
より横Gを推定し、この横Gに基づきステップ104〜
106の油圧制御を行う。
In step 103, this rotational speed difference W+++ Wiz
(or Wiz WN4), the turning radius, and the vehicle specifications, and based on this lateral G, step 104~
106 hydraulic control is performed.

すなわちステップ104の横Gの判別において横GくO
ならば(ただし横Gは左車輪から右車輪に向う方向を正
とする)、ステップ105で油圧P^。
That is, in the determination of lateral G in step 104, lateral G is
If so (however, the lateral G is positive in the direction from the left wheel to the right wheel), then in step 105 the oil pressure P^ is determined.

P、がP、 =P、+ΔP 、  Pm =Po−ΔP
となるような油圧制御を行う。なお後輪においては横G
の判別条件を横G〉0とし、またこの油圧制御はモータ
19の駆動電流の大きさおよび極性を横Gの値に応じて
制御することにより実行する。
P, is P, =P, +ΔP, Pm =Po−ΔP
Perform hydraulic control such that In addition, the lateral G on the rear wheels
The determination condition is lateral G>0, and this hydraulic control is executed by controlling the magnitude and polarity of the drive current of the motor 19 in accordance with the value of lateral G.

一方、ステップ104の横Gの判別において横G〉0な
らば(後輪においては横C<O)、ステップ106で油
圧pA、 p、がPA=Po −AP 、 Pg=po
 +、!!IPとなるような油圧制御を行う。なおこの
判別において横G=0ならば本例の制御は不要であるた
め制御をそのまま終了する。
On the other hand, if lateral G>0 in the determination of lateral G in step 104 (lateral C<O for the rear wheels), in step 106 the oil pressure pA, p is determined as PA=Po -AP, Pg=po
+,! ! Perform hydraulic control to achieve IP. Note that in this determination, if lateral G=0, the control of this example is unnecessary and the control is ended as is.

上記制御の作用について以下に詳細に説明する。The operation of the above control will be explained in detail below.

まず上記実施例の説明を行う前に、このサスペンション
システムの原理的構成を示す第2図を用いて制御の原理
について説明する。
First, before explaining the above-mentioned embodiment, the principle of control will be explained using FIG. 2 which shows the basic structure of this suspension system.

第2図中70.71は夫々前後輪の油圧シリンダであり
、図示上方(シリンダチューブ)を車体側に支持し、下
方(ピストンロッド)を車輪側に支持する。油圧シリン
ダ70の油室70aと油圧シリンダ71の油室71bと
を油路72により接続し、油路72にアキエムレータ7
3を設ける。同様に油室70bと71aとを接続する油
路74にアキュムレータ75を設ける。
In FIG. 2, reference numerals 70 and 71 indicate hydraulic cylinders for the front and rear wheels, and the upper part (cylinder tube) in the figure is supported on the vehicle body side, and the lower part (piston rod) is supported on the wheel side. The oil chamber 70a of the hydraulic cylinder 70 and the oil chamber 71b of the hydraulic cylinder 71 are connected by an oil passage 72,
3 will be provided. Similarly, an accumulator 75 is provided in the oil passage 74 connecting the oil chambers 70b and 71a.

次にこの原理図の装置の作用を説明する。いま前輪側よ
り加わる力ΔFrにより油圧シリンダ70のピストン7
0cがΔxfだけストロークしたとすると、後輪側の油
圧シリンダ71のピストン71cのストロークΔ×、が
0であれば、ピストン71cを図示上方に押上げようと
する力Af (−ΔFt )が働き、アキュムレータ圧
の上昇(ΔPf+ ΔP、、)によりストロークに対す
る剛性が上って、定性的なスタビライズ効果を得ること
ができる。
Next, the operation of the device shown in this principle diagram will be explained. The piston 7 of the hydraulic cylinder 70 is now moved by the force ΔFr applied from the front wheel side.
Assuming that 0c has a stroke of Δxf, if the stroke Δx of the piston 71c of the hydraulic cylinder 71 on the rear wheel side is 0, a force Af (-ΔFt) acts to push the piston 71c upward in the drawing. By increasing the accumulator pressure (ΔPf+ΔP, .), the rigidity against the stroke increases, and a qualitative stabilizing effect can be obtained.

ここで左右車輪の回転数差が大きい高横G走行中には、
車両のロールにより所定車輪の輪荷重が増加し、油圧シ
リンダ70.71を図示上方より押付けようとする力が
増加するから、車両系全体として見ると相対的に車輪側
より加わる力、71IFtまたは/!JFrと逆方向の
力が加わる場合と同様になる。
During high lateral G driving where there is a large difference in rotation speed between the left and right wheels,
The wheel load of a given wheel increases due to the roll of the vehicle, and the force that tries to press the hydraulic cylinder 70.71 from above in the figure increases, so when looking at the vehicle system as a whole, the relative force applied from the wheel side, 71IFt or / ! This is the same as when a force in the direction opposite to JFr is applied.

したがって第3図の機構を左前輪・右後輪系および右前
輪・左後輪系に夫々設けた車両においては、アキュムレ
ータ圧制御(apr 、ΔP、)を行わなくても左前輪
・右後輪系および右前輪・左後輪系の一方が+AK、他
方が一Δ讐となる効果が得られる。
Therefore, in a vehicle in which the mechanism shown in Fig. 3 is installed in the left front wheel/right rear wheel system and the right front wheel/left rear wheel system, the left front wheel/right rear wheel system can be An effect can be obtained in which one of the system and the right front wheel/left rear wheel system is +AK, and the other is -Δ.

ところで本例のサスベンジジンにおいては、各車輪の輪
荷重を制御する際、車両の姿勢変化を生じさせないため
には一つの車輪に対し前後方向および左右方向の輪荷重
差を等しくしてモーメント変化をなくす必要がある(例
えば右前輪の輪荷重を7wだけ増加させた場合、他の車
輪の輪荷重は一義的に定まり、左後輪を+Δ−1左前輪
および右後輪を−Δ胃として対角線上の車輪の輪荷重移
動量を等しくする)。このような輪荷重の移動を実行す
るため、第1図に示す本実施例においては前述したアキ
ュムレータ圧制御により所望のロール剛性配分を実現す
るように油圧可変シリンダおよびその制御機構を設けで
ある。
By the way, in the suspension engine of this example, when controlling the wheel load of each wheel, in order to prevent the vehicle's attitude from changing, it is necessary to equalize the wheel load difference in the front-rear direction and the left-right direction for one wheel to control the moment change. (For example, if the wheel load of the right front wheel is increased by 7w, the wheel loads of the other wheels are uniquely determined, and the left rear wheel is +Δ-1, the left front wheel is -Δ stomach, and the diagonal line is equalize the wheel load transfer of the upper wheels). In order to carry out such wheel load movement, the present embodiment shown in FIG. 1 is provided with a hydraulic variable cylinder and its control mechanism so as to achieve a desired roll stiffness distribution by controlling the accumulator pressure described above.

これにより前述した左右車輪の回転数差が太きい高横G
走行中には横Gにより車両がロールしようとするが、こ
こで本発明においては第3図の制御プログラムのステッ
プ103−104−105またはステップ103−10
4−106が実行されて対角線上の車輪の輪荷重の一方
が+lW、他方が一ΔWとなるから、これにより車両の
姿勢変化を生ずることなく所望のロール剛性配分を得る
ことができる。
This results in a high lateral G with a large difference in rotation speed between the left and right wheels.
While driving, the vehicle tends to roll due to lateral G, but in the present invention, steps 103-104-105 or step 103-10 of the control program in FIG.
4-106 is executed and one of the wheel loads of the diagonal wheels becomes +lW and the other becomes 1ΔW, so that a desired roll stiffness distribution can be obtained without causing a change in the attitude of the vehicle.

またこのサスペンション制御装置は従来装置と比べて構
成が簡単であるから、システムの大幅なコストダウンを
達成することができる。
Furthermore, since this suspension control device has a simpler configuration than conventional devices, it is possible to achieve a significant cost reduction in the system.

(発明の効果) かくして本発明のサスペンション制御装置は上述の如く
、流体圧制御系を左前輪・右後輪系と右前輪・左後輪系
との2系統に分割し、これら制御系に対し同一圧力値の
増圧および減圧を同時に実行したから、車両の姿勢変化
を生ずることなく所望のロール剛性配分を得ることが可
能なサスペンション制御装置を極めて簡単な構成で実現
することができ、システムの大幅なコストダウンを達成
することができる。
(Effects of the Invention) As described above, the suspension control device of the present invention divides the fluid pressure control system into two systems, the left front wheel/right rear wheel system and the right front wheel/left rear wheel system, and controls these control systems. Since the same pressure value is increased and decreased at the same time, it is possible to realize a suspension control device with an extremely simple configuration that can obtain the desired roll stiffness distribution without causing any change in the vehicle attitude. Significant cost reductions can be achieved.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明のサスペンション制御装置の第1実施例
の構成を示す線図、 第2図は同例の原理的構成を示す線図、第3図は同例に
おけるコントローラの制御プログラムを示すフローチャ
ートである。 10FL、 l0PR,l0RL、 l0RR・・・油
圧シリンダ11FL、 IIFR,IIRL、 IIR
R・・・車輪12・・・車体       13・・・
サススプリング14、15・・・油路     16.
17・・・アキュムレータ18・・・油圧可変シリンダ 19・・・モータ      20・・・ウオームギア
21・・・コントローラ   22〜25・・・車輪速
センサ第2図
FIG. 1 is a diagram showing the configuration of a first embodiment of the suspension control device of the present invention, FIG. 2 is a diagram showing the principle configuration of the same example, and FIG. 3 is a diagram showing the control program of the controller in the same example. It is a flowchart. 10FL, l0PR, l0RL, l0RR...Hydraulic cylinder 11FL, IIFR, IIRL, IIR
R...Wheel 12...Vehicle body 13...
Suspension springs 14, 15...oil passage 16.
17...Accumulator 18...Hydraulic variable cylinder 19...Motor 20...Worm gear 21...Controller 22-25...Wheel speed sensor Fig. 2

Claims (1)

【特許請求の範囲】 1、各車輪と車体との間に流体圧シリンダを設けたサス
ペンション装置において、 車両の走行状態を検出する走行状態検出手段と、左前輪
および右後輪の流体圧シリンダ間を連通する第1の圧力
系統と、 右前輪および左後輪の流体圧シリンダ間を連通する第2
の圧力系統と、 前記第1および第2の圧力系統間に設けた流体圧アクチ
ュエータと、 検出された走行状態に基づき、前記流体圧アクチュエー
タにより前記第1および第2の圧力系統の流体圧の一方
を増圧すると同時に、他方を同一圧力値だけ減圧する圧
力制御手段とを具えて成ることを特徴とするサスペンシ
ョン制御装置。 2、前記走行状態検出手段は、車両の走行状態として車
両の横方向Gまたは横方向G相当量を検出することを特
徴とする請求項1記載のサスペンション制御装置。
[Claims] 1. In a suspension device in which a fluid pressure cylinder is provided between each wheel and the vehicle body, a driving state detection means for detecting the traveling state of the vehicle, and a fluid pressure cylinder between the left front wheel and the right rear wheel. A first pressure system that communicates with the hydraulic cylinders of the right front wheel and the left rear wheel, and a second pressure system that communicates between the hydraulic cylinders of the front right wheel and the rear left wheel.
a pressure system; a fluid pressure actuator provided between the first and second pressure systems; and one of the fluid pressures of the first and second pressure systems by the fluid pressure actuator based on the detected running state. 1. A suspension control device comprising: pressure control means for simultaneously increasing the pressure of one and reducing the pressure of the other by the same pressure value. 2. The suspension control device according to claim 1, wherein the running state detection means detects a lateral G of the vehicle or an amount equivalent to the lateral G as the running state of the vehicle.
JP136089A 1989-01-10 1989-01-10 Suspension control device Pending JPH02182529A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP136089A JPH02182529A (en) 1989-01-10 1989-01-10 Suspension control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP136089A JPH02182529A (en) 1989-01-10 1989-01-10 Suspension control device

Publications (1)

Publication Number Publication Date
JPH02182529A true JPH02182529A (en) 1990-07-17

Family

ID=11499329

Family Applications (1)

Application Number Title Priority Date Filing Date
JP136089A Pending JPH02182529A (en) 1989-01-10 1989-01-10 Suspension control device

Country Status (1)

Country Link
JP (1) JPH02182529A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5447332A (en) * 1991-07-16 1995-09-05 Kinetic Limited Vehicle suspension system
US5562305A (en) * 1991-12-18 1996-10-08 Kinetic Limited Vehicle suspension system
US7431309B2 (en) 2002-08-07 2008-10-07 Toyota Jidosha Kabushiki Kaisha Ground contact load control apparatus for a vehicle
JP2014104906A (en) * 2012-11-29 2014-06-09 Mitsubishi Nichiyu Forklift Co Ltd Forklift

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5447332A (en) * 1991-07-16 1995-09-05 Kinetic Limited Vehicle suspension system
US5562305A (en) * 1991-12-18 1996-10-08 Kinetic Limited Vehicle suspension system
US7431309B2 (en) 2002-08-07 2008-10-07 Toyota Jidosha Kabushiki Kaisha Ground contact load control apparatus for a vehicle
JP2014104906A (en) * 2012-11-29 2014-06-09 Mitsubishi Nichiyu Forklift Co Ltd Forklift

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