JPS6067273A - Four-wheel steering device of car - Google Patents

Four-wheel steering device of car

Info

Publication number
JPS6067273A
JPS6067273A JP58175936A JP17593683A JPS6067273A JP S6067273 A JPS6067273 A JP S6067273A JP 58175936 A JP58175936 A JP 58175936A JP 17593683 A JP17593683 A JP 17593683A JP S6067273 A JPS6067273 A JP S6067273A
Authority
JP
Japan
Prior art keywords
steering
angle
rear wheel
pulse motor
wheel steering
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.)
Granted
Application number
JP58175936A
Other languages
Japanese (ja)
Other versions
JPH0431904B2 (en
Inventor
Akihiko Miyoshi
三好 晃彦
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 JP58175936A priority Critical patent/JPS6067273A/en
Publication of JPS6067273A publication Critical patent/JPS6067273A/en
Publication of JPH0431904B2 publication Critical patent/JPH0431904B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D7/00Steering linkage; Stub axles or their mountings
    • B62D7/06Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins
    • B62D7/14Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering
    • B62D7/15Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering characterised by means varying the ratio between the steering angles of the steered wheels

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
  • Power Steering Mechanism (AREA)

Abstract

PURPOSE:To reduce the error ratio and improve followability by moving rear wheels by little by means of a rear wheel steering device when the front wheel steering speed is low at a high car speed and moving them faster when the front wheel steering speed in high at a low car speed. CONSTITUTION:A steering device 2 steering front wheels 1 and a rear wheel steering device 4 steering rear wheels 3 are provided, and the rear wheel steering device 4 is driven by a pulse motor 5. The steering angle of the steering handle 6 of the steering device 2 is detected by a steering angle sensor 7, and a control means fed with at least the signal of this steering angle sensor 7 feeds a control signal in response to the front wheel steering angle to the pulse motor 5. A step angle setting means outputs a signal increasing the step angle of the pulse motor when the car speed is low and relatively decreasing the step angle of the pulse motor 5 when the car speed is high to the pulse motor 5 via the control means.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、自動車等の車両にJ5いC前輪の転舵に応じ
C後輪をも転舵制御りるようにした車両の4輪操舵装置
に関づるものである。
Detailed Description of the Invention (Industrial Application Field) The present invention provides four-wheel steering for vehicles such as automobiles in which steering control is applied to the C rear wheels in response to the steering of the J5C front wheels. It is related to equipment.

(従来技術) 従来より、この秤の車両の4輪操舵装置としく、例えば
特開or+ 57−11173号公報に開示されている
ように、前輪を転舵づるステアリング装置mと、油圧ア
クチュエータの作動によって後輪を転舵駆7))J ’
7する接輪転舵装置とを[7え、前輪の転舵角および車
速に応じて上記油圧アクヂュj二一夕を作動制御づるこ
とにより、前輪転舵角に対づる後輪転舵角特性を車速に
応じて変化さ14るようにしたものが知られている。こ
の4輪転舵装買によれば、例えば低速時には前輪に対し
て後輪を逆向き(逆位相)に転舵づることにより旋回性
能を向上し、最小回転半径の低減を可能とりる他、高速
時には前輪に対して後輪を同じ向き(同(1/相)に転
舵すスムースに行うことができるものである。
(Prior Art) Conventionally, a four-wheel steering system for a vehicle of this scale has been used, for example, as disclosed in Japanese Patent Application Laid-Open No. Steer the rear wheels by 7)) J'
[7] By controlling the operation of the hydraulic actuator according to the front wheel steering angle and vehicle speed, the rear wheel steering angle characteristic relative to the front wheel steering angle can be adjusted to the vehicle speed. A device is known in which the temperature is changed depending on the situation. With this four-wheel steering system, for example, at low speeds, the rear wheels are steered in the opposite direction (opposite phase) to the front wheels, thereby improving turning performance and reducing the minimum turning radius. Sometimes, it is possible to smoothly steer the rear wheels in the same direction (same (1/phase)) as the front wheels.

しかしで、上記の如く4輪操舵を行うについで、従来法
り」二作機−1”J X −Yブロック−等の位置zノ
こめ用に使用され、応答性よ< klr m 戊の制御
が可能なパルスモータを前記後輪転舵装置の駆動源とし
゛C使用した場合に、このパルス七−夕は応巴速度に限
界があるため、前輪転舵速度が大きい時に後輪の転舵遅
れがR1′りる恐れがある。′8Iなりら、通常、上記
パルス七−夕を制御する場合、ステップ角(例えば、0
.9°/5tep)を一定にして駆動パルス信号のパル
ス数りなわちステップ数を変動し−C1その移動mの制
御+を行うJ:うにしているが、パルスモータ(J、上
記のように応答速度に限界があって、例えば1秒間に1
500スデツブ程度が通常使用されているものの限度で
ある。このため、パルス−し−夕の速度を向上−りるに
は、そのステップ角を大きくりればよいが、このステッ
プ角の大ぎなパルスモータ(例えば、3.6°/5te
p)は、操舵の変化量(前輪転舵速度)が相対的に大き
い低速+1i’iにはパルスモータの回転速度が大きく
後輪転舵遅れの改善が図れるが、操舵の変化ii1 (
前輪転舵速度)が相対的に小さい高速時には、パルスモ
ータの1ステツプで移動りる後輪転舵角が人ぎくなって
制御精度が低下し、特に高精度の制御を必要とり゛る4
輪操舵装首には不適当な−bのeある。
However, in addition to performing four-wheel steering as described above, the conventional method is used to control the position of the two-way machine - 1" J X - Y block - etc., and the responsiveness is When a pulse motor that is capable of Normally, when controlling the above-mentioned pulse Tanabata, the step angle (for example, 0
.. 9°/5tep) is kept constant and the number of pulses of the drive pulse signal, that is, the number of steps, is varied to control the movement m. There is a limit to the response speed, for example 1 per second.
About 500 sd is the limit of what is normally used. Therefore, in order to increase the speed of the pulse motor, the step angle can be increased, but if the step angle is too large (for example, 3.6°/5
p) is that at low speed +1i'i where the amount of change in steering (front wheel turning speed) is relatively large, the rotational speed of the pulse motor is large and it is possible to improve the rear wheel turning delay, but when the steering change ii1 (
At high speeds when the front wheel steering speed (front wheel steering speed) is relatively small, the rear wheel steering angle, which is moved in one step of the pulse motor, becomes clumsy and the control accuracy decreases, requiring particularly high precision control4.
There is an e in -b that is inappropriate for wheel steering equipment.

しかしC1上記1711題をM決りるために、小さいス
テップ角C1秒当りのステップ数が人込い^性能のパル
スモータを使用りること(よ、コストの上シー、重量増
加、?i’J Fi電力の増加等の問題がある。
However, in order to solve the above problem 1711, a pulse motor with a small step angle C1 and a high number of steps per second is used. There are problems such as an increase in Fi power.

(発明の目的) 木ブを明は上記事情に鑑み、パルスし一タ【ま例えばそ
の励磁方式を変えることにより簡単にステップ角を変更
りることが′Cきることに′6F41 シ、また、通%
tの運転状態にJ3いては、高速0.冒こは低速+1.
’iに比べてステアリングハンドルの操舵mが411対
的に小ざいことから、車速の変動に対応Iノ乙、パルス
モータの駆動に伴う後輪転舵表[r?にJ、る後輪の動
きを、前輪転舵速度が小さい8速1j″Tには小刻みに
して誤差比率を小さくし^tlifαに自偉値に合致さ
せる一方、前輪転舵速11が大きい低速時には速度を高
めて追従性を向上して庁れの発生を解消りるJ、うにし
て制il+ 1!l能を改良した車両の4輪操舵装置を
1jIi供りることを目的とりるものぐある。
(Purpose of the Invention) In view of the above circumstances, Akira has discovered that it is possible to easily change the step angle by changing the excitation method, for example, by changing the excitation method. %
When J3 is in the operating state at t, the high speed is 0. Blasphemy is slow +1.
Since the steering m of the steering wheel is smaller than that of 'i', the steering wheel steering table [r? The movement of the rear wheels is reduced in small increments at 8th gear 1j''T, where the front wheel steering speed is low, to reduce the error ratio and make ^tlifα match the self-speed value, while at low speeds where the front wheel steering speed 11 is high. The purpose is to provide a four-wheel steering system for vehicles with improved control performance that sometimes increases speed and improves follow-up performance to eliminate the occurrence of steering wheel failures. Guaru.

(発明の構成) 釘11図は本発明の(111成を明示りるための全体1
i、i成因である。
(Structure of the Invention) Figure 11 of the nail is the entire structure 1 for clearly showing the structure of the present invention (111).
i, i is the cause.

本発明の4輪操舵装fY i、’l、前輪1を転舵りる
ステアリング装置2ど、後輪3を転舵する後輪転舵装置
4とを備え、後輪転舵装置/lはパルスモータ5にて駆
動される。ステアリング装置2のステアリングハンドル
6の舵角が舵角センリフによって検出2Xれ、少なくと
もこの舵角レンリ7の信号が人力された制御手段は、前
輪転舵角に応じた制御信号を上記パルスモータ5に送出
りる。また、車速の1:N低を車速ロンザ8にJ:り検
出し、この車速センサ8の出力に基づきステップ角設定
手段は高速のときパルスモータ5のステップ角を相対的
に小ざくづる信号を制御手段を介してパルスモータ5に
出力するものである。
The four-wheel steering device fY i,'l of the present invention is equipped with a steering device 2 for steering the front wheels 1, a rear wheel steering device 4 for steering the rear wheels 3, and the rear wheel steering device /l is a pulse motor. 5. The steering angle of the steering handle 6 of the steering device 2 is detected by the steering angle sensor 2X, and the control means to which at least the signal of the steering angle sensor 7 is manually input sends a control signal corresponding to the front wheel steering angle to the pulse motor 5. I'll send it out. Further, when the vehicle speed is 1:N low, the vehicle speed sensor 8 detects that the vehicle speed is 1:N low, and based on the output of the vehicle speed sensor 8, the step angle setting means generates a signal that relatively reduces the step angle of the pulse motor 5 when the vehicle speed is high. The signal is output to the pulse motor 5 via the control means.

車速の高低を検出し、このIN速が低速のときにはパル
ス七−夕のステップ角を人込<シ、車速か拘束のときに
はパルスモータのスープツブ角を小さくしたことにより
、前輪転舵速度が人8い低速11.1は後輪の転舵速度
も人込くして追従性を向−17シ後輪の転舵遅れを解消
するとともに、前輪転舵速度が小さい高速時には後輪の
転舵角を小刻みにしく目標クシ、舵角との誤差を小さく
りることがCき、全領域で高精度な制′61jを行って
、4輪操舵装置の9、ν性を十分に光111tさUるこ
とが−Cさる。
The height of the vehicle speed is detected, and when the IN speed is low, the step angle of the pulse tanabata is set to less than 6. When the vehicle speed or restraint is detected, the step angle of the pulse motor is made smaller. The low speed 11.1 also reduces the rear wheel steering speed to improve followability.17Shi eliminates the rear wheel steering delay, and at high speeds when the front wheel steering speed is small, the rear wheel steering angle is reduced. It is possible to reduce the error with the target comb and steering angle in small steps, perform highly accurate control over the entire range, and fully control the characteristics of the four-wheel steering system. That is -C monkey.

(実施例) 以下、本発明の実施例を第2図〜第5j図に治って説明
づる。
(Example) Examples of the present invention will be described below with reference to FIGS. 2 to 5j.

第2図に承りように、ノC石の前輪’1.1を転舵する
ステアリング装置2は、ステアリングハンドル6ど、該
ステアリングハンドル6の回転運動を直線往復運動に変
換りるラックビニAン1.!Hiii 11ど、該ラッ
タビニオン健椙11の作動を前輪1゜1に伝達してこれ
らを転舵させるh石のタイ上1ツド1;’、1’;)、
11」ご7F−)−・ンノ7ノIIう7/、IQ1′、
’lJ−カ口う414成されている。
As shown in FIG. 2, the steering device 2 for steering the front wheels '1.1 of the No. .. ! Hiii 11, etc., transmits the operation of the rattan pinion 11 to the front wheels 1゜1 and steers them.
11''go7F-)--nnno7noIIu7/, IQ1',
'lJ-Kaguchi 414 has been completed.

一方、左右の後輪3.3を転舵する接輪転舵装置4は、
車体に左右方向に1習動自在に保持された後輪操作ロッ
ド14と、該後輪操作1]ツド14の左右両端にそれぞ
れタイロッド15.15を介し“C連結された左右のナ
ックルアーム16.16とを有し、上記後輪操作ロッド
14の軸方向の移動により、後輪3.3が転舵する。そ
して、後輪操作ロッじ14にはラック17が形成され、
該ラック17に噛合Jるピニオン18がパルスモータ5
により一対の傘歯車19,20J5よびピニオン軸21
を介して回転されることにより、上記パルスモータ5の
回転方向、回転量に対応して後輪3゜J3を転舵りる。
On the other hand, the wheel steering device 4 that steers the left and right rear wheels 3.3 is
A rear wheel operating rod 14 is held on the vehicle body so as to be movable in the left and right direction, and left and right knuckle arms 16 are connected to the left and right ends of the rear wheel operating rod 14 via tie rods 15 and 15, respectively. 16, and the rear wheels 3.3 are steered by the axial movement of the rear wheel operating rod 14. A rack 17 is formed on the rear wheel operating rod 14.
The pinion 18 meshing with the rack 17 is connected to the pulse motor 5.
A pair of bevel gears 19, 20J5 and pinion shaft 21
By being rotated through the pulse motor 5, the rear wheel 3J3 is steered in accordance with the direction and amount of rotation of the pulse motor 5.

また、上記後輪操作ロッド14はパワ・−シリンダ22
をn通し、該パワーシリンダ22内を左右の油圧室22
a、22bに仕切るピストン23がこの後輪操作ロッド
14に固着されると共に、上記油圧1ffi22a、2
2bには、ビニiンl11121ノ周囲に設(プられた
コントロールバルブ24から導かれた油圧油v825a
、25F)がぞれぞれ接続され、また上記コン1〜[1
−ルバルブ24どAイルポンプ27との間には油圧供給
通路2Bおよびリターン通路29か陵t)られでいる。
Further, the rear wheel operating rod 14 is connected to a power cylinder 22.
through the left and right hydraulic chambers 22 inside the power cylinder 22.
A piston 23 partitioning the rear wheel into the rear wheel operating rod 14 is fixed to the rear wheel operating rod 14, and the hydraulic pressure 1ffi22a, 22b is fixed to the rear wheel operating rod 14.
Hydraulic oil v825a led from the control valve 24 installed around the vinyl 11121 is installed in 2b.
, 25F) are connected respectively, and the above controllers 1 to [1
A hydraulic supply passage 2B and a return passage 29 are provided between the oil valve 24 and the oil pump 27.

ここで、上記二1ントロールバルブ27!Iは、パルス
七−夕5の回転時にピニオン軸21に加4)る回転力に
応じて作動し、オイルポンプ27から油圧供給通路28
を経て供給Δれる油圧を上記回転力の方向に応じ1パワ
ーシリンダ22のいずれか一方の油圧’4722 aに
1〔は22bに導入し、他力の油圧室22bまたは22
a内の作動油をリターン通路29を介して上記オイルポ
ンプ27に戻りように作用りる。したがって、上記パル
スモータ5により傘歯車19゜20、ピニオン軸21、
ピニオン18おJ、びラック17を介して後輪操作ロッ
ド14が軸方向に移動される時に、上記パワーシリンダ
22内に導入された?111圧がピストン23を介して
後輪操作し1ツド14の移動をアシストづるものである
Here, the above-mentioned 21 control valve 27! I is operated in response to the rotational force applied to the pinion shaft 21 during the rotation of the pulse Tanabata 5, and is operated from the oil pump 27 to the hydraulic pressure supply passage 28.
According to the direction of the rotational force, the hydraulic pressure supplied through Δ is introduced into the hydraulic pressure chamber 22b or 22b of either one of the power cylinders 22, and the other hydraulic pressure chamber 22b or 22
The hydraulic oil in a is returned to the oil pump 27 via the return passage 29. Therefore, the pulse motor 5 rotates the bevel gear 19°20, the pinion shaft 21,
When the rear wheel operating rod 14 is moved in the axial direction via the pinion 18 and the rack 17, is it introduced into the power cylinder 22? The 111 pressure operates the rear wheel via the piston 23 and assists the movement of the shaft 14.

上記パルスモータ5はドライバ31を介して、コントロ
ーラ30から出力される制御信冠にJζつ(作動制御+
される。該コン1〜〇−ラ30には、中速センソ8から
出ツノされる中速信号と、上記ステアリング装囮2にお
りるステアリングハンドル6の操舵角を検出する舵角は
ン(J7からの舵角信号と、接輪転舵装置4にJO]る
パルスモータ5の作動量から後輪転舵量を検出りる後輪
転舵角はンサ33からの後輪転舵角伏目と、バッテリ電
源Bおよびイグニッション信号1(lとが入力される。
The pulse motor 5 is connected to the control pin output from the controller 30 via the driver 31 (operation control +
be done. The controllers 1 to 30 are provided with a medium speed signal output from the medium speed sensor 8 and a steering angle sensor (from J7) that detects the steering angle of the steering wheel 6 that goes to the steering decoy 2. The rear wheel steering amount is detected from the steering angle signal and the operation amount of the pulse motor 5 which is input to the contact wheel steering device 4. The rear wheel steering angle is determined by the rear wheel steering angle reduction from the sensor 33, the battery power source B and the ignition. Signal 1 (l) is input.

また、この11ン1ヘローラ30にはメータ表示器34
が接続され一ζ転舵状態が表示される。
Also, this 11-1 roller 30 has a meter display 34.
is connected and the -ζ steering status is displayed.

次に、コン1−ローラ30の構成を第3図を参照しC説
明Jる。
Next, the configuration of the controller 1-roller 30 will be explained with reference to FIG.

前記舵角センソ7の検出信号d3 J:び車速センソ8
の倹IJI信号は後輪転舵角1iii n部35(ご人
力され、この後輪転舵角演樟部35で目標後輪転舵角0
rが演律される。
Detection signal d3 of the steering angle sensor 7 J: and vehicle speed sensor 8
The IJI signal indicates the rear wheel turning angle 1iii n part 35 (by manual input, this rear wheel turning angle control part 35 sets the target rear wheel turning angle 0).
r is performed.

すなわら、」:記後輪転舵角演粋部35ぐは、舵角セン
ソ゛7の信号によりステアリングハンドル6により1」
標後輪転舵角θrをめる。この後輪転舵角θ1゛の演算
は、例えば第4図に示ず如き操舵角θhと車速Vとに対
づる後輪転舵角θ1゛の特性が予め後輪転舵角波n部3
5に記1)1されてa3す、この特性に従って締出され
る。ここで、第4図に示ず後輪転舵特性は、低速11,
1に(よ、操舵角OI)が一定値を越えると操舵角θ1
1の増大にしたがって後輪転舵角θrが大きな転舵比θ
r/θ11でマイナス方向の逆位相(前後輪が逆方向に
転舵りる状態)に増入りるーh、高速(11に(、(、
操舵角Ohの増大にしたがって後輪転舵角θ1゛がプラ
ス方向に1iiJ位相〈前後輪が同方向にりlI:舵り
る状態)で増大するとともに、一定の操舵角θ11を越
えるど転舵比θr/θ11が略一定どなるよう【こ設定
さ11−(いる。これは、低速u・Yにおりる車両旋回
1(青の最小回転半径をIiJ及的小さくし、また高速
時にJ3りるレーンヂエンジをスムースに実現りるため
て゛ある。
In other words, the rear wheel steering angle control unit 35 operates the steering wheel 6 to turn the steering wheel 6 according to the signal from the steering angle sensor 7.
Determine the target rear wheel steering angle θr. This calculation of the rear wheel turning angle θ1' is carried out in such a way that the characteristics of the rear wheel turning angle θ1' with respect to the steering angle θh and the vehicle speed V as shown in FIG.
5. 1) 1 and a3 are excluded according to this characteristic. Here, the rear wheel steering characteristics, which are not shown in FIG.
1 (steering angle OI) exceeds a certain value, the steering angle θ1
1, the rear wheel steering angle θr becomes larger as the steering ratio θ increases.
At r/θ11, the phase increases in the negative direction (the front and rear wheels are steered in opposite directions) - h, high speed (at 11 (, (,
As the steering angle Oh increases, the rear wheel turning angle θ1' increases in the positive direction with a phase of 1iiJ (the front and rear wheels are in the same direction lI: steering state), and as the steering angle exceeds a certain steering angle θ11, the steering ratio increases. This is set so that θr/θ11 is approximately constant. This is in order to achieve this smoothly.

」ニ記後輪転舵角演粋部35で0出した後輪転舵輪転舵
角aンリa aからの実11!I後輪転舵角θr+とを
比較して、その幅差丘に応じた制illΦにイ(1当す
る信号を補正パルス光牛部339に対t)’c出力する
” 2 Rear wheel steering angle calculation part 35 gave 0 Rear wheel steering wheel steering angle a Anri a Actual 11 from a! It compares the rear wheel turning angle θr+ with the rear wheel turning angle θr+, and outputs a signal corresponding to the control illumination Φ according to the width difference hill to the correction pulse light output section 339.

また、中速レンジε3の車速信号Vは第2の比較器3)
7に人力され、第2の比較器37はこの車速Vと設定伯
号発生部38からの設定饋1くとを比較して、fit速
Vが設定f1riKより大きい高速時に、ドライバ31
にハイレベルもしくはローレベルのステップ角信号を出
力し、このドライバ3′1からパルス七−夕5に出ツノ
される駆動パルス信号の励磁h]、(を変えで、パルス
モータ5のステップ角を^速時には小さく(1スーアッ
プ0.9°)、低速時には大きく(1ステップ1.8°
)切換えて駆動リ−るものである。
In addition, the vehicle speed signal V in the medium speed range ε3 is transmitted to the second comparator 3).
7, the second comparator 37 compares this vehicle speed V with the setting number from the setting number generating section 38, and when the fit speed V is higher than the setting f1riK, the second comparator 37 compares the vehicle speed V with the setting number from the setting number generating section 38.
A step angle signal of high level or low level is output to the driver 3'1, and the step angle of the pulse motor 5 can be adjusted by changing ^ Small at high speed (1 step up 0.9°), large at low speed (1 step 1.8°)
) is switched and driven.

補正パルス発生部39は、Or −Or’の正負に応じ
てパルスモータ5の回転方向に対応した回転方向切換え
イを月、a3よび所定の周波数の駆動パルス信号をドラ
イバ31に出力し、ドライバ31はこの16号J3 J
:び第2の比較器37からの中速Vに応じたステップ角
信号を受けてパルスモータ5を駆動づる駆動パルス信号
に変換しCパルス七−タ5に出力し、1;1保接輪転−
舵角01・どなるように後輪転舵装置4を駆動着る。
The correction pulse generator 39 outputs a drive pulse signal of a predetermined frequency to the driver 31 to switch the rotation direction corresponding to the rotation direction of the pulse motor 5 according to the positive or negative of Or - Or'. Hako No. 16 J3 J
: Receives a step angle signal corresponding to the medium speed V from the second comparator 37, converts it into a drive pulse signal for driving the pulse motor 5, and outputs it to the C-pulse septator 5, thereby generating a 1;1 contact wheel rotation. −
The rear wheel steering device 4 is driven so that the steering angle is 01.

なJl、上記駆動パルス信号は、低速1)、YにJjい
ては、ハンドル舵角速度の最大(lO(約760°/S
)に対応し、これに上:IL! L/た第4図の特性に
5tづざ後輪転舵角θ1゛の最大値(約20°)の転舵
を、追従遅れを起さないようにパルスし−95を駆動づ
るためのパルス数とステップ角の信号がまり、高速時に
おいではハンドル舵角速度おJ、び第4図による後輪転
舵角θrのいずれし小さくなることから、後輪3の転舵
に空き時間が生じないJ、うに、均等にパルスモータ5
を駆動りるためのパルス数とステップ角の信号がまるも
のである。
Jl, the above drive pulse signal is low speed 1), Jj is the maximum steering angle speed of the steering wheel (lO (approximately 760°/S
) and above this: IL! The number of pulses required to drive -95 is to pulse the steering to the maximum value (approximately 20 degrees) of the rear wheel steering angle θ1゛ (approximately 20 degrees) based on the characteristics shown in Figure 4. and the step angle signal becomes condensed, and at high speeds, both the steering wheel angular velocity J and the rear wheel turning angle θr shown in FIG. Pulse motor 5 evenly
The number of pulses and the step angle signal for driving are the sum of the signals.

次に、上記実施例のコン1ヘローラ30の作動を第5図
に示すフローヂ17−1−を用いて説明りる。
Next, the operation of the controller roller 30 of the above embodiment will be explained using the flow 17-1- shown in FIG.

この第5図の例では、第3図と異なり後輪転舵角レン→
ノ33の実測後輪転舵角信号を人力JることなくA−プ
ン制御を行う場合について示している。
In the example shown in Fig. 5, unlike Fig. 3, the rear wheel steering angle lens →
This figure shows the case where the A-turn control is performed on the actually measured rear wheel turning angle signal of No. 33 without human power.

第5図のルーチンによれば、スター1− L、 ’c1
シスラムイニシ1?ライス(第5図にJl4プるステッ
プ′1)1ンの後、舵角センサ7による操舵角θ11お
Jζびili速eンVε3によるZD速Vを読み込む(
+)2)。
According to the routine in FIG. 5, star 1-L, 'c1
Sysram Inishi 1? After rice (step '1 in Figure 5), read the steering angle θ11 from the steering angle sensor 7 and the ZD speed V from the speed Vε3 (
+)2).

この操舵角θ11がOoかどうかylll!7i L/
 (P3 )、)11三Sの場合には後輪転舵角θ1゛
をOoに補正する(P4)一方、Noの場合には操舵角
θ11J3よび車速Vにすづき、第4図の特性にJ、り
予め登録しである目標後輪転舵角θ1゛を搾出する(1
〕5)。
Illll whether this steering angle θ11 is Oo! 7i L/
(P3), )113S, the rear wheel steering angle θ1゛ is corrected to Oo (P4), while in the case of No, the steering angle θ11J3 and the vehicle speed V are used, and the characteristics shown in Fig. 4 are corrected to J. , extracts the target rear wheel turning angle θ1゛ which is registered in advance (1
]5).

ぞし−(、車速Vが設定1+fj Kより小さい低速1
1.1かどうか判断1)(p(i ) 、YES (低
速)のとぎにはステップ角を人きり1.8°/ 5te
pどする信)〕を出力Jる(Pl)一方、No(高速)
のとぎにはステップ角を小さく0.9°/ St(!p
どJる信号をドライバ31に出カシ−る(P8)。続い
て、ステップ1〕!)によるv1輪転舵角θrと前回算
出した後輪転舵角θr′とが一致づるよう、(θr−θ
I゛’ l = 0どなるパルス数、回転方向をnl[
して所定の駆動パルスをドライバ31に出力しく1〕9
)、今回の後輪転舵角Orを前回の後輪転舵角θr1に
メモリ上記実施例によれば、車速Vが低速のとぎには、
パルスモータ5のステップ角を大キクシで後輪3の転舵
近れを解消する一方、車速Vが高速のどきには、ステッ
プ角を小さくして1話輪3の動きを小刻みにして、全領
域にJlいC精度のJ、い後輪転舵RI!I illを
行うことができる。
Zoshi-(, low speed 1 where vehicle speed V is smaller than setting 1 + fj K
1.1 Judgment 1) (p(i), YES (low speed), set the step angle to 1.8°/5te
output J (Pl), while No (high speed)
Next, reduce the step angle to 0.9°/St(!p
A signal is output to the driver 31 (P8). Next, step 1]! ) so that the v1 wheel steering angle θr matches the previously calculated rear wheel steering angle θr', (θr−θ
I゛' l = 0 The number of pulses and rotation direction is nl [
and output a predetermined drive pulse to the driver 311]9
), the current rear wheel steering angle Or is stored as the previous rear wheel steering angle θr1 According to the above embodiment, when the vehicle speed V is low,
While setting the step angle of the pulse motor 5 to a large angle to eliminate the tendency of the rear wheels 3 to turn, when the vehicle speed V is high, the step angle is reduced to make the movement of the first wheel 3 small and the entire steering wheel 3 is turned in small increments. J, rear wheel steering RI with Jl C precision in the area! Ill can do it.

また、上記第5図に示J実施例(’ +J 、後輪転記
角θrの実測検出にJ、るフィードバック制御GJ行っ
Cいないが、これはフィードバック制御を全領域で行う
ど操舵の変化diの大きいII、Yには、フィードバッ
ク制御を実行しCいる口へ間だり応答匠れ1′Jハンヂ
ングが弁生りることになるためであるが、本発明(Jl
例えば、ハンドル舵角速度のみ後輪3の基準位置を修正
して、制御誤差の蓄積を解ン肖りるようにしてもよく、
また、常に後輪の転舵角をフィードバック制御するよう
にしたものにも適用可能である。
In addition, although the above-mentioned embodiment J shown in FIG. This is because large II and Y will result in a delay in response to the output of C when feedback control is executed, but the present invention (Jl)
For example, the reference position of the rear wheels 3 may be corrected only for the steering angular velocity to eliminate the accumulation of control errors.
It is also applicable to a system in which the steering angle of the rear wheels is constantly feedback-controlled.

一方、上記実施例では後輪転舵■Iに油I工によって後
@3の転舵をアシス(へりるいわゆるバワによる転舵動
作を?lIF実にしているが、パルスモー95のみによ
る転舵もしくは他のアシヌト態構を採用してもよい。
On the other hand, in the above embodiment, the steering of the rear @3 is assisted by the oil I in the rear wheel steering I. The asynut configuration may be adopted.

また、上記のように車速の高低に応じて相対的にステッ
プ角を変化さけるとともに、この中速に対応しくパルス
モータ5の駆動パルス周波数を可変としくもJ、く、高
速のとぎにパルスモータ5のステップ角を小8くりると
同時に、駆動パルス周波数を低くりるようにりるど、よ
り良好な制御を行うことができる。
In addition, as described above, the step angle is relatively changed depending on the vehicle speed, and the drive pulse frequency of the pulse motor 5 is made variable corresponding to this medium speed. Better control can be achieved by reducing the step angle by 8 or at the same time lowering the drive pulse frequency.

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

第1図は本発明の構成を明示するための11両の4輪操
舵装置の全体構成図、 第2図1よ木ブを明の一実施例ににる車両の4輪操舵装
置の具体的構造例を示J全体借成因、第3図はコントロ
ーラのブロック図、 第4図はコントローラに設定される後輪転舵性11の一
例を承り”特性図、 第5図は上記実施例にJ3りる後輪転舵制御の流れを示
すフローヂャートである。 1・・・・・・前輪 2・・・・・・ステ1リング装置
u3・・・・・・後輪 4胃・・・後輪転舵装置5・・
・・・・パルスモータ 6・・・・・・スデアリングハンドル 7・・・・・・舵角センυ 8・・・・・・車速レンジ
30・・・・・・コントローラ
Fig. 1 is an overall configuration diagram of a four-wheel steering system for 11 vehicles to clearly demonstrate the structure of the present invention. 3 is a block diagram of the controller, FIG. 4 is a characteristic diagram showing an example of the rear wheel steerability 11 set in the controller, and FIG. This is a flowchart showing the flow of rear wheel steering control. 1...Front wheel 2...Steering device u3...Rear wheel 4 stomach...Rear wheel steering device 5...
...Pulse motor 6 ... Steering handle 7 ... Steering angle sensor υ 8 ... Vehicle speed range 30 ... Controller

Claims (1)

【特許請求の範囲】[Claims] (1) 前輪を転舵りるステアリング装置と、後輪を転
舵゛りる後輪転舵装置と、後輪ψλ館波装置駆動りるパ
ルスモー夕と、上記ステアリング装置のステアリングハ
ンドルの舵角を検出する舵角センリーと、少な(とも上
記舵角レン9の信号が入力され前輪転舵角に応じたit
i’l ill信号をパルスモータに送出りる制御手段
と、車速の高低を検出する車速はンザと、この車速セン
Iすの出力に基づき、高速のどきパルスモータのステッ
プ角を相対的に小さくツるステップ角設定手段とが設(
〕られたことを特徴とりる車両の4輪操舵装置。
(1) A steering device that steers the front wheels, a rear wheel steering device that steers the rear wheels, a pulse motor that drives the rear wheel ψλ Tateha device, and a steering angle of the steering wheel of the steering device. The rudder angle sensor to be detected and the rudder angle sensor (both input the signal from the rudder angle sensor 9 and adjust it according to the front wheel turning angle)
A control means for sending the i'l ill signal to the pulse motor, a vehicle speed sensor for detecting the height of the vehicle speed, and a relatively small step angle of the high-speed pulse motor based on the output of this vehicle speed sensor I. A turning step angle setting means is provided (
] A four-wheel steering device for a vehicle characterized by the fact that:
JP58175936A 1983-09-22 1983-09-22 Four-wheel steering device of car Granted JPS6067273A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58175936A JPS6067273A (en) 1983-09-22 1983-09-22 Four-wheel steering device of car

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58175936A JPS6067273A (en) 1983-09-22 1983-09-22 Four-wheel steering device of car

Publications (2)

Publication Number Publication Date
JPS6067273A true JPS6067273A (en) 1985-04-17
JPH0431904B2 JPH0431904B2 (en) 1992-05-27

Family

ID=16004839

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58175936A Granted JPS6067273A (en) 1983-09-22 1983-09-22 Four-wheel steering device of car

Country Status (1)

Country Link
JP (1) JPS6067273A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01297373A (en) * 1988-05-24 1989-11-30 Jidosha Kiki Co Ltd Control of steering electric motor for four-wheel steering device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01297373A (en) * 1988-05-24 1989-11-30 Jidosha Kiki Co Ltd Control of steering electric motor for four-wheel steering device

Also Published As

Publication number Publication date
JPH0431904B2 (en) 1992-05-27

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