JPH08310216A - Suspension device for vehicle - Google Patents

Suspension device for vehicle

Info

Publication number
JPH08310216A
JPH08310216A JP11733895A JP11733895A JPH08310216A JP H08310216 A JPH08310216 A JP H08310216A JP 11733895 A JP11733895 A JP 11733895A JP 11733895 A JP11733895 A JP 11733895A JP H08310216 A JPH08310216 A JP H08310216A
Authority
JP
Japan
Prior art keywords
lateral acceleration
vehicle
detection signal
value
diagnostic tool
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
JP11733895A
Other languages
Japanese (ja)
Other versions
JP3821500B2 (en
Inventor
Osamu Isobe
修 磯邉
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.)
UD Trucks Corp
Original Assignee
UD Trucks 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 UD Trucks Corp filed Critical UD Trucks Corp
Priority to JP11733895A priority Critical patent/JP3821500B2/en
Publication of JPH08310216A publication Critical patent/JPH08310216A/en
Application granted granted Critical
Publication of JP3821500B2 publication Critical patent/JP3821500B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PURPOSE: To learn a neutral point (horizontal value) of cross acceleration, cor rect a detected value of the cross acceleration by a learned value, and select the cross acceleration after correction or the cross acceleration before correction as necessary to be displayed in a diagnosis tool in roll control of a suspension. CONSTITUTION: A suspension device is provided with roll control means (a)-(c) to change suspension characteristics in accordance with cross acceleration of a vehicle, and a communication means (d) with a diagnosis tool to perform trouble inspection of a control system from the external. It is also provided with a means (e) to learn an output value in a horizontal state of it based on a detection signal of the cross acceleration, a means (f) to correct the detection signal of the cross acceleration as an input signal of roll control based on a learned value, and a means (g) to selectively transmit the cross acceleration after correction or the cross acceleration before correction in accordance with a display demand signal from the diagnosis tool.

Description

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

【0001】[0001]

【産業上の利用分野】この発明は車両のサスペンション
装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle suspension device.

【0002】[0002]

【従来の技術】車両の乗心地と操安性を高いレベルで両
立させるため、エアスプリングのばね定数およびショッ
クアブソーバの減衰力を、通常はソフトの状態に保つ一
方で、旋回時など操安性が重視される走行状況でハード
に切り替えるようにした電子制御サスペンションが知ら
れている(三菱自動車・テクニカル レビュー・199
3 NO.5『大型バス用電子制御サスペンションの開発』
参照)。
2. Description of the Related Art In order to achieve a high level of ride comfort and maneuverability of a vehicle, the spring constant of the air spring and the damping force of the shock absorber are normally kept in a soft state while the maneuverability during turning is improved. An electronically controlled suspension is known, which is designed to be switched to a hard one in a driving situation where importance is attached to (Mitsubishi Motors Technical Review 199
3 NO.5 “Development of electronically controlled suspension for large buses”
reference).

【0003】このうち、ロール制御においては、車両の
横加速度を検出するため、車体に加速度センサが設けら
れるが、センサの特性や取付精度およびエアスプリング
のレベリング誤差などにより、停車時のセンサ出力が必
ずしも水平にならないので、センサ出力の中立点(水平
値)を補正する何らかの機能が必要になる。そこで、セ
ンサ出力をフィルタリング処理して中立点を学習補正す
る手法が考えられる(特開昭64ー32918号公
報)。
Among them, in the roll control, an acceleration sensor is provided on the vehicle body in order to detect the lateral acceleration of the vehicle, but the sensor output when the vehicle is stopped depends on the characteristics of the sensor, the mounting accuracy, the leveling error of the air spring, and the like. Since it is not always horizontal, some function for correcting the neutral point (horizontal value) of the sensor output is required. Therefore, a method of filtering the sensor output to learn and correct the neutral point is conceivable (Japanese Patent Laid-Open No. 64-32918).

【0004】[0004]

【発明が解決しようとする課題】ところで、整備時に車
載の電子制御装置と通信して各種の情報を表示する診断
ツール(例えば、CONSULT)が良く使用され、こ
れで横加速度センサの出力値をモニタしながら、センサ
を水平な取付状態に修正することもできる。しかし、横
加速度の水平値を学習補正する機能を備える場合、制御
に使用される横加速度値は補正後のため、これに基づい
て修正してみても、センサは真の水平状態になるとは限
らず、バッテリ交換などで学習値が消去されると、学習
値が安定するまでに再び多くの時間を要するという不具
合があった。
By the way, a diagnostic tool (for example, CONSULT) that communicates with an on-vehicle electronic control unit to display various kinds of information at the time of maintenance is often used to monitor the output value of the lateral acceleration sensor. However, the sensor can also be modified for horizontal mounting. However, when the function to learn and correct the horizontal value of the lateral acceleration is provided, the lateral acceleration value used for control is after correction, so even if you try to correct it based on this, the sensor does not always become the true horizontal state. However, if the learned value is erased by replacing the battery, it takes a long time to stabilize the learned value.

【0005】この発明はこのような問題点を解決するこ
とを目的とする。
An object of the present invention is to solve such a problem.

【0006】[0006]

【課題を解決するための手段】第1の発明では、図7の
ように車両のサスペンション特性を切り替える手段a
と、車体の横加速度を検出する手段bと、その検出信号
に基づいて車体のロールを抑制するようにサスペンショ
ン特性の切り替えを制御する手段cと、制御系の故障点
検を外部から行う診断ツールと通信する手段dを備える
サスペンション装置において、横加速度の検出信号に基
づきその水平状態での出力値を学習する手段eと、この
学習値からロール制御の入力信号としての横加速度の検
出信号を補正する手段fと、診断ツールからの表示要求
信号に応じて補正後の横加速度と補正前の横加速度を選
択的に送信する手段gを設ける。
In the first aspect of the invention, means a for switching the suspension characteristics of a vehicle as shown in FIG.
A means b for detecting the lateral acceleration of the vehicle body, a means c for controlling switching of suspension characteristics so as to suppress the roll of the vehicle body based on the detection signal, and a diagnostic tool for externally inspecting the control system for failure. In a suspension device including a communication means d, a means e for learning an output value in a horizontal state based on a lateral acceleration detection signal and a lateral acceleration detection signal as an input signal for roll control are corrected from the learned value. Means f and means g for selectively transmitting the corrected lateral acceleration and the uncorrected lateral acceleration in response to a display request signal from the diagnostic tool are provided.

【0007】第2の発明では、図8のように車両のサス
ペンション特性を切り替える手段aと、車体の横加速度
を検出する手段bと、その検出信号に基づいて車体のロ
ールを抑制するようにサスペンション特性の切り替えを
制御する手段cと、制御系の故障点検を外部から行う診
断ツールと通信する手段dを備えるサスペンション装置
において、横加速度の検出信号に基づきその水平状態で
の出力値を学習する手段eと、この学習値からロール制
御の入力信号としての横加速度の検出信号を補正する手
段fと、車速を検出する手段hと、その検出信号から停
車中か走行中かを判定する手段iと、診断ツールからの
表示要求信号を受信すると判定結果に応じて走行中は補
正後の横加速度値を、停車中は補正前の横加速度値を送
信する手段jを設ける。
In the second aspect of the invention, as shown in FIG. 8, a means a for switching the suspension characteristics of the vehicle, a means b for detecting the lateral acceleration of the vehicle body, and a suspension for suppressing the rolling of the vehicle body based on the detection signal thereof. In a suspension device including means c for controlling characteristic switching and means d for communicating with a diagnostic tool for externally inspecting a control system for failure, a means for learning an output value in a horizontal state based on a lateral acceleration detection signal. e, means f for correcting the lateral acceleration detection signal as an input signal for roll control from the learned value, means h for detecting the vehicle speed, and means i for determining whether the vehicle is stopped or running from the detected signal. When a display request signal from the diagnostic tool is received, a means j is provided for transmitting the corrected lateral acceleration value while the vehicle is running and the uncorrected lateral acceleration value when the vehicle is stopped, according to the determination result. That.

【0008】[0008]

【作用】第1の発明によれば、診断ツールに補正後の横
加速度値と補正前の横加速度値が表示要求信号に応じて
選択的に表示される。したがって、診断ツールの表示要
求信号を切り替えることで、制御機能の確認を意図する
ときは補正後の横加速度値を、センサの水平な取付状態
への修正を意図するときは補正前の横加速度値をそれぞ
れ診断ツールに表示させることができる。
According to the first aspect of the invention, the lateral acceleration value after correction and the lateral acceleration value before correction are selectively displayed on the diagnostic tool in accordance with the display request signal. Therefore, by switching the display request signal of the diagnostic tool, the corrected lateral acceleration value is used when confirming the control function and the uncorrected lateral acceleration value when intending to correct the sensor to a horizontal mounting state. Can be displayed on each diagnostic tool.

【0009】第2の発明によれば、診断ツールの表示要
求信号を受信すると、走行中は補正後の横加速度値を、
停車中は補正前の横加速度値を自動的に選択して診断ツ
ールに送信する。つまり、診断ツールの表示要求信号を
意図的に切り替えることなく、走行中は補正後の横加速
度値で制御機能を確認できる一方、停車中は補正前の横
加速度値から横加速度センサを水平な取付状態に修正す
ることが可能になる。
According to the second aspect of the present invention, when the display request signal of the diagnostic tool is received, the lateral acceleration value after correction is calculated during traveling.
When the vehicle is stopped, the lateral acceleration value before correction is automatically selected and sent to the diagnostic tool. In other words, without intentionally switching the display request signal of the diagnostic tool, the control function can be checked with the corrected lateral acceleration value while driving, while the lateral acceleration sensor is mounted horizontally from the uncorrected lateral acceleration value while the vehicle is stopped. It becomes possible to correct it to the state.

【0010】[0010]

【実施例】図1,図2において、20は車両のばね上系
としての車体、1a〜1dは車両の各ばね下系としての
タイヤ、これらにエアスプリング2a〜2fとショック
アブソーバ7a〜7fが介装される。ショックアブソー
バ7a〜7fは図示しないが、ピストンのオリフィスを
開閉することで、ハードとソフトの2段階に切り替わる
減衰力可変機構(アクチュエータを含む)を備える。
1 and 2, 20 is a vehicle body as a sprung system of a vehicle, 1a to 1d are tires as unsprung systems of the vehicle, and air springs 2a to 2f and shock absorbers 7a to 7f are attached to them. Intervened. Although not shown, the shock absorbers 7a to 7f are provided with a damping force variable mechanism (including an actuator) that is switched between two stages, hard and soft, by opening and closing the orifice of the piston.

【0011】エアスプリング2a〜2fはそれぞれ所望
の車高を保つようにエアの給排気を制御するレベリング
バルブ4a〜4cを介してエアリザーバ3に接続され
る。後輪側はレベリングバルブ4cが1つのため、後部
左右のエアスプリング2c,2eと2d,2fが連通し
ているので、旋回時などにロール剛性を高める上から、
各々の配管に開閉弁8a,8bが設けられる。
The air springs 2a to 2f are connected to the air reservoir 3 via leveling valves 4a to 4c for controlling air supply and exhaust so as to maintain a desired vehicle height. Since the rear wheel has one leveling valve 4c, the rear left and right air springs 2c, 2e and 2d, 2f are in communication with each other.
Open / close valves 8a and 8b are provided in the respective pipes.

【0012】各エアスプリング2a〜2fにそれぞれ切
換弁6a〜6fを介してサブタンク5a〜5dが接続さ
れ、弁6a〜6fの開閉を制御すると、実質的な空気容
積が変化するため、エアスプリング2a〜2fのばね定
数は2段階(ハードとソフト)に切り替わるようになっ
ている。図1は全体のシステム構成図、図2は車輪1つ
分のサスペンションを代表する前輪側の構成図である。
The sub-tanks 5a to 5d are connected to the air springs 2a to 2f via the switching valves 6a to 6f, respectively. When the opening / closing of the valves 6a to 6f is controlled, the substantial air volume changes, so that the air spring 2a. The spring constant of ~ 2f is switched between two levels (hard and soft). FIG. 1 is an overall system configuration diagram, and FIG. 2 is a configuration diagram on a front wheel side representing a suspension for one wheel.

【0013】車両の走行状況に応じた各種制御を行うの
に必要な検出手段として、車両の走行速度を検出する車
速センサ17と、車体の横加速度を検出する横加速度セ
ンサ14と、車体の上下加速度を検出する上下加速度セ
ンサ15a,15b(この場合、前輪側の車軸中央を挟
む左右の対称位置に配設される)と、ハンドルの操舵角
を検出する操舵角センサ11と、車両の制動状態を検出
するフットブレーキスイッチ12およびバックランプス
イッチ16とサイドブレーキスイッチ13と、手動制御
と自動制御を選択するためのモード切り替えスイッチ1
0が設けられる。
The vehicle speed sensor 17 for detecting the traveling speed of the vehicle, the lateral acceleration sensor 14 for detecting the lateral acceleration of the vehicle body, and the vertical direction of the vehicle body are provided as the detection means necessary for performing various controls according to the traveling condition of the vehicle. Vertical acceleration sensors 15a and 15b for detecting acceleration (in this case, they are arranged at left and right symmetrical positions with the center of the axle on the front wheel side interposed), a steering angle sensor 11 for detecting the steering angle of the steering wheel, and a braking state of the vehicle. Foot brake switch 12, back lamp switch 16, side brake switch 13, and mode changeover switch 1 for selecting manual control and automatic control
0 is provided.

【0014】ここで、横加速度センサ14は差動トラン
ス式で、ボビン外周の差動トランス型コイルとマグネッ
トで構成され、ボビン内のボールが慣性力で移動する
と、差動トランス型コイルの電圧が変動し、その値から
加速度を検出するようになっている。この場合、センサ
14の取付精度やエアスプリングのレベリング誤差など
により、必ずしも停車時のセンサ出力の中立点が水平に
ならないから、後述のようにセンサ出力の中立点(水平
値)を学習補正する必要が生じるのである。
Here, the lateral acceleration sensor 14 is of a differential transformer type and is composed of a differential transformer type coil on the outer periphery of the bobbin and a magnet. When a ball inside the bobbin moves by inertial force, the voltage of the differential transformer type coil is changed. It fluctuates, and the acceleration is detected from the value. In this case, the neutral point (horizontal value) of the sensor output needs to be learned and corrected as described later, because the neutral point of the sensor output when the vehicle is stopped is not always horizontal due to the mounting accuracy of the sensor 14 and the leveling error of the air spring. Occurs.

【0015】これらセンサやスイッチからの入力信号に
基づいて、車体のロールやブレーキダイブおよびピッチ
ング・バウンジングなどを制御するのがコントローラ9
で、制御系の故障点検を外部から行う診断ツール18と
の通信機能が格納される。
The controller 9 controls rolls of the vehicle body, brake dives, pitching and bouncing, etc. based on input signals from these sensors and switches.
Then, the communication function with the diagnostic tool 18 for externally inspecting the failure of the control system is stored.

【0016】コントローラ9のロール制御系における機
能的なブロック構成を表すと、図3のように横加速度セ
ンサ14の検出信号を入力処理する手段31と、車速セ
ンサ17の検出信号を入力処理する入力手段32と、停
車時に横加速度信号の中立点を学習補正する手段34
と、走行時に補正後の横加速度信号に基づいてロール制
御の要否を判定する手段35と、その判定結果からエア
スプリング2a〜2fの切換弁6a〜6fに制御信号を
出力する手段36と、同じくショックアブソーバ7a〜
7fの減衰力可変機構に制御信号を出力する手段37
と、診断ツール18からの表示要求信号を入力処理する
手段38と、表示要求信号に応じて補正後の加速度信号
と補正前の加速度信号を選択する手段39と、その選択
信号を診断ツール18に送信する手段40を備える。
The functional block configuration of the roll control system of the controller 9 is shown in FIG. 3. The means 31 for processing the detection signal of the lateral acceleration sensor 14 and the input for processing the detection signal of the vehicle speed sensor 17 as shown in FIG. Means 32 and means 34 for learning and correcting the neutral point of the lateral acceleration signal when the vehicle is stopped
A means 35 for determining necessity of roll control based on the corrected lateral acceleration signal during traveling, and a means 36 for outputting a control signal to the switching valves 6a-6f of the air springs 2a-2f based on the determination result. Similarly, shock absorber 7a ~
Means 37 for outputting a control signal to the damping force varying mechanism of 7f
A means 38 for input-processing the display request signal from the diagnostic tool 18, a means 39 for selecting the corrected acceleration signal and the uncorrected acceleration signal according to the display request signal, and the selection signal to the diagnostic tool 18. It comprises means 40 for transmitting.

【0017】図4はロール制御を説明するフローチャー
トで、所定の制御周期で繰り返し実行される。まず、ス
テップ1で各種初期化を行った後、ステップ2で横加速
度センサ14の検出信号Gyと車速センサ17の検出信
号Vをぞれぞれ読み取る。
FIG. 4 is a flow chart for explaining the roll control, which is repeatedly executed at a predetermined control cycle. First, after various initializations are performed in step 1, the detection signal Gy of the lateral acceleration sensor 14 and the detection signal V of the vehicle speed sensor 17 are read in step 2, respectively.

【0018】ステップ3で診断ツール18からの表示要
求信号MRを読み取り、ステップ4で表示要求信号MR
の意図を判定し、制御機能の確認を意図するとき(MR
=0)は、ステップ5で補正後の横加速度値を、横加速
度センサの水平な取付状態への修正を意図するとき(M
R≠0)は、ステップ6で補正前の横加速度値をそれぞ
れ診断ツール18に出力する。
In step 3, the display request signal MR from the diagnostic tool 18 is read, and in step 4, the display request signal MR.
When the intention is to judge the control function and confirm the control function (MR
= 0) when the lateral acceleration value corrected in step 5 is intended to be corrected to the horizontal mounting state of the lateral acceleration sensor (M
If R ≠ 0), the lateral acceleration value before correction is output to the diagnostic tool 18 in step 6.

【0019】そして、ステップ7で車速信号から車両が
走行中か停車中かを判定し、走行中(V≠0)のときは
ステップ8へ進み、車両のロール制御を行う。すなわ
ち、ステップ8で横加速度の検出信号Gyと学習値Go
から補正後の加速度信号Gcを計算し、ステップ9でG
cの絶対値を制御閾値Gtと比較する。
Then, in step 7, it is determined from the vehicle speed signal whether the vehicle is running or stopped. If the vehicle is running (V ≠ 0), the process proceeds to step 8 and roll control of the vehicle is performed. That is, in step 8, the lateral acceleration detection signal Gy and the learning value Go are obtained.
The corrected acceleration signal Gc is calculated from
The absolute value of c is compared with the control threshold Gt.

【0020】|Gc|>Gtのときは、ステップ10お
よびステップ11でエアスプリング2a〜2fの切換弁
6a〜6fを『閉』、ショックアブソーバ7a〜7fの
減衰力可変機構を『ハード』の状態に切り替える。|G
c|>Gtでないときは、ステップ12およびステップ
13でエアスプリング2a〜2fの切換弁6a〜6fを
『開』、ショックアブソーバ7a〜7fの減衰力可変機
構を『ソフト』の状態に保持する。
When | Gc |> Gt, in steps 10 and 11, the switching valves 6a to 6f of the air springs 2a to 2f are "closed" and the damping force varying mechanism of the shock absorbers 7a to 7f is "hard". Switch to. | G
If c |> Gt is not satisfied, then in steps 12 and 13, the switching valves 6a to 6f of the air springs 2a to 2f are "opened" and the damping force varying mechanism of the shock absorbers 7a to 7f is held in a "soft" state.

【0021】ステップ7で停車中(V=0)のときは、
横加速度の検出信号Gyの中立点(水平値)を学習する
ため、ステップ14で停車後から所定時間T1(停車に
伴う車体の揺れが収まるに必要な時間)が経過すると、
ステップ15で所定時間T2が経過するまで横加速度の
検出信号Gyの平均値Gaを計算する。
When the vehicle is stopped (V = 0) in step 7,
In order to learn the neutral point (horizontal value) of the lateral acceleration detection signal Gy, when a predetermined time T 1 (the time required for the shaking of the vehicle body due to the vehicle stop is stopped) elapses after the vehicle stops in step 14.
In step 15, the average value Ga of the lateral acceleration detection signal Gy is calculated until the predetermined time T 2 has elapsed.

【0022】そして、ステップ16で所定時間T2が経
過すると、ステップ17で平均値Gaに重み係数Wを付
け、これまでの学習値Goに1−Wを乗し、これらを足
し合わせた値を新たな学習値Goとしてメモリの書き換
えを行う。
Then, when a predetermined time T 2 has passed in step 16, a weighting factor W is added to the average value Ga in step 17, the learning value Go so far is multiplied by 1-W, and a value obtained by adding these is obtained. The memory is rewritten as a new learning value Go.

【0023】このように、横加速度センサ14の水平状
態の出力値Goが学習され、補正後の横加速度値Gcに
基づいてロール制御は行われるため、車体のロールを適
確に抑制することができる。
As described above, since the horizontal output value Go of the lateral acceleration sensor 14 is learned and the roll control is performed based on the corrected lateral acceleration value Gc, the roll of the vehicle body can be appropriately suppressed. it can.

【0024】この場合、整備時に診断ツール18が使用
されるが、コントローラ9は診断ツール18からの表示
要求信号MRを受信すると、補正後の横加速度値Gcと
補正前の横加速度値Gyを表示要求信号MRに応じて選
択的に送信するため、診断ツール18の表示要求信号M
Rを切り替えることで、制御機能の確認を意図するとき
は、補正後の横加速度値Gcを、センサ14の水平な取
付状態への修正を意図するときは、補正前の横加速度値
Gyをそれぞれ診断ツール18に表示できる。
In this case, the diagnostic tool 18 is used during maintenance, but when the controller 9 receives the display request signal MR from the diagnostic tool 18, it displays the corrected lateral acceleration value Gc and the uncorrected lateral acceleration value Gy. Since the request signal MR is selectively transmitted, the display request signal M of the diagnostic tool 18 is transmitted.
By switching R, when the intention is to confirm the control function, the corrected lateral acceleration value Gc is corrected, and when the sensor 14 is intended to be corrected to the horizontal mounting state, the corrected lateral acceleration value Gy is corrected. It can be displayed on the diagnostic tool 18.

【0025】したがって、補正前の横加速度値Gyに基
づいて、センサ14を水平な取付状態に修正すること
で、バッテリ交換などで学習値が消去されても、新たな
学習値Goの安定に必要な時間は短縮できる。
Therefore, by correcting the sensor 14 to a horizontal mounting state based on the uncorrected lateral acceleration value Gy, it is necessary to stabilize the new learning value Go even if the learning value is erased due to battery replacement or the like. Time can be shortened.

【0026】図5は他の実施例としてコントローラ9の
ブロック構成を表すもので、診断ツール18への表示信
号を選択する手段39Aは、診断ツール18から表示要
求信号MRを受信すると、車速信号Vから停車中か走行
中かを判定し、走行中は補正後の横加速度値を、停車中
は補正前の横加速度値を送信するようになっている。な
お、図3と同じ手段に同じ符号を付けて、重複説明は省
略する。
FIG. 5 shows a block configuration of the controller 9 as another embodiment. The means 39A for selecting the display signal to the diagnostic tool 18 receives the display request signal MR from the diagnostic tool 18 and outputs the vehicle speed signal V. It is configured to determine whether the vehicle is stopped or running, and the lateral acceleration value after correction is transmitted while the vehicle is running, and the lateral acceleration value before correction is transmitted while the vehicle is stopped. Note that the same reference numerals are given to the same means as those in FIG. 3, and duplicate description will be omitted.

【0027】コントローラ9の制御内容を図6のフロー
チャートにおいて説明すると、ステップ1で各種初期化
を行った後、ステップ2で横加速度センサ14の検出信
号Gyと車速センサ17の検出信号Vおよび診断ツール
からの表示要求信号MRを読み取る。ステップ3で表示
要求信号MRの受信を判定し、受信なし(MR=0)の
ときにステップ7へ進む。受信あり(MR≠0)のとき
は、ステップ4で車速信号Vから走行中(V≠0)か停
車中(V=0)かを判定し、走行中はステップ5で補正
後の横加速度値Gcを、停車中はステップ6で補正前の
横加速度値Gyをそれぞれ診断ツール18に送信する。
The control contents of the controller 9 will be described with reference to the flow chart of FIG. 6. After various initializations have been carried out in step 1, the detection signal Gy of the lateral acceleration sensor 14 and the detection signal V of the vehicle speed sensor 17 and the diagnostic tool are shown in step 2. The display request signal MR from is read. In step 3, the reception of the display request signal MR is determined, and when there is no reception (MR = 0), the process proceeds to step 7. When there is reception (MR ≠ 0), it is determined in step 4 whether the vehicle is traveling (V ≠ 0) or stopped (V = 0) based on the vehicle speed signal V, and during traveling, in step 5, the lateral acceleration value after correction is corrected. Gc and the lateral acceleration value Gy before correction are respectively transmitted to the diagnostic tool 18 in step 6 while the vehicle is stopped.

【0028】そして、ステップ7に進むと、停車中(V
=0)のときは、ステップ14〜ステップ17で横加速
度の検出信号Gyの水平値Goを学習する一方、走行中
(V≠0)のときは、ステップ8〜ステップ13で横加
速度の補正値Gcに基づいてサスペンション特性の切り
替えを制御する。なお、ステップ7〜ステップ17の各
処理動作は前記の実施例と同じため、図4と同じ処理番
号を付ける。
Then, when the operation proceeds to step 7, the vehicle is stopped (V
= 0), the horizontal value Go of the lateral acceleration detection signal Gy is learned in steps 14 to 17, while when running (V ≠ 0), the lateral acceleration correction value is acquired in steps 8 to 13. Switching of suspension characteristics is controlled based on Gc. Since each processing operation of step 7 to step 17 is the same as that of the above-mentioned embodiment, the same processing number as in FIG. 4 is assigned.

【0029】これによると、走行中と停車中で診断ツー
ル18への表示信号が自動的に切り替わるため、診断ツ
ール18の表示要求信号MRを意図的に切り替えること
なく、単に表示要求信号MRの発生のみで、走行中は補
正後の横加速度値Gcで制御機能の確認を図れ、停車中
は補正前の横加速度値Gyでセンサ17の水平な取付状
態への修正も可能になる。
According to this, since the display signal to the diagnostic tool 18 is automatically switched while the vehicle is running and stopped, the display request signal MR of the diagnostic tool 18 is not intentionally switched and the display request signal MR is simply generated. Only with this, it is possible to confirm the control function with the corrected lateral acceleration value Gc during traveling, and to correct the sensor 17 to the horizontal mounting state with the uncorrected lateral acceleration value Gy while the vehicle is stopped.

【0030】[0030]

【発明の効果】第1の発明によれば、車両のサスペンシ
ョン特性を切り替える手段と、車体の横加速度を検出す
る手段と、その検出信号に基づいて車体のロールを抑制
するようにサスペンション特性の切り替えを制御する手
段と、制御系の故障点検を外部から行う診断ツールと通
信する手段を備えるサスペンション装置において、横加
速度の検出信号に基づきその水平状態での出力値を学習
する手段と、この学習値からロール制御の入力信号とし
ての横加速度の検出信号を補正する手段と、診断ツール
からの表示要求信号に応じて補正後の横加速度と補正前
の横加速度を選択的に送信する手段を設けたので、診断
ツールの表示要求信号を切り替えることで、制御機能の
確認を意図するときは補正後の横加速度値を、センサの
水平な取付状態への修正を意図するときは補正前の横加
速度値をそれぞれ診断ツールに表示できる。
According to the first aspect of the present invention, the means for switching the suspension characteristic of the vehicle, the means for detecting the lateral acceleration of the vehicle body, and the switching of the suspension characteristic so as to suppress the roll of the vehicle body based on the detection signal thereof. In the suspension device including means for controlling the control system and means for communicating with a diagnostic tool for externally inspecting the control system, a means for learning the output value in the horizontal state based on the detection signal of the lateral acceleration, and the learned value The means for correcting the lateral acceleration detection signal as the input signal for the roll control and the means for selectively transmitting the corrected lateral acceleration and the uncorrected lateral acceleration according to the display request signal from the diagnostic tool are provided. Therefore, by switching the display request signal of the diagnostic tool, when confirming the control function, the corrected lateral acceleration value is changed to the horizontal mounting state of the sensor. When intended for modification can display lateral acceleration value before correction to each diagnostic tool.

【0031】第2の発明によれば、車両のサスペンショ
ン特性を切り替える手段と、車体の横加速度を検出する
手段と、その検出信号に基づいて車体のロールを抑制す
るようにサスペンション特性の切り替えを制御する手段
と、制御系の故障点検を外部から行う診断ツールと通信
する手段を備えるサスペンション装置において、横加速
度の検出信号に基づきその水平状態での出力値を学習す
る手段と、この学習値からロール制御の入力信号として
の横加速度の検出信号を補正する手段と、車速を検出す
る手段と、その検出信号から停車中か走行中かを判定す
る手段と、診断ツールからの表示要求信号を受信すると
判定結果に応じて走行中は補正後の横加速度を、停車中
は補正前の横加速度を送信する手段を設けたので、診断
ツールの表示要求信号を意図的に切り替えることなく、
単に表示要求信号の発生のみで、走行中は補正後の横加
速度値を、停車中は補正前の横加速度値をそれぞれ診断
ツールに表示できる。
According to the second aspect of the invention, the means for switching the suspension characteristics of the vehicle, the means for detecting the lateral acceleration of the vehicle body, and the switching of the suspension characteristics so as to suppress the rolling of the vehicle body based on the detection signal. And a means for communicating with a diagnostic tool for externally inspecting the control system for failure, a means for learning an output value in the horizontal state based on a detection signal of lateral acceleration, and a roll from the learned value. A means for correcting the lateral acceleration detection signal as the control input signal, a means for detecting the vehicle speed, a means for determining whether the vehicle is stopped or running from the detection signal, and a display request signal from the diagnostic tool Depending on the judgment result, a means for transmitting the corrected lateral acceleration while the vehicle is running and the lateral acceleration before the correction while the vehicle is stopped is provided. Intentionally without switching the issue,
By simply generating the display request signal, the lateral acceleration value after correction can be displayed on the diagnostic tool while the vehicle is running, and the lateral acceleration value before correction can be displayed while the vehicle is stopped.

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

【図1】この発明の実施例を示すシステム全体の構成図
である。
FIG. 1 is a configuration diagram of an entire system showing an embodiment of the present invention.

【図2】同じく車輪1つ分のサスペンションを表す構成
図である。
FIG. 2 is a configuration diagram similarly showing a suspension for one wheel.

【図3】同じくコントローラの機能的なブロック図であ
る。
FIG. 3 is also a functional block diagram of the controller.

【図4】同じくコントローラの制御内容を説明するフロ
ーチャートである。
FIG. 4 is a flowchart for explaining the control contents of the controller.

【図5】他の実施例を示すコントローラの機能的なブロ
ック図である。
FIG. 5 is a functional block diagram of a controller showing another embodiment.

【図6】同じくコントローラの制御内容を説明するフロ
ーチャートである。
FIG. 6 is a flowchart for explaining the control contents of the controller.

【図7】この発明のクレーム対応図である。FIG. 7 is a diagram corresponding to the claims of the present invention.

【図8】この発明のクレーム対応図である。FIG. 8 is a diagram corresponding to the claims of the present invention.

【符号の説明】[Explanation of symbols]

1a〜1d タイヤ 2a〜2f エアスプリング 4a〜4c レベリングバルブ 5a〜5d サブタンク 6a〜6f 切換弁 7a〜7f ショックアブソーバ 9 コントローラ 14 横加速度センサ 17 車速センサ 18 診断ツール 1a-1d Tire 2a-2f Air spring 4a-4c Leveling valve 5a-5d Sub-tank 6a-6f Switching valve 7a-7f Shock absorber 9 Controller 14 Lateral acceleration sensor 17 Vehicle speed sensor 18 Diagnostic tool

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 車両のサスペンション特性を切り替える
手段と、車体の横加速度を検出する手段と、その検出信
号に基づいて車体のロールを抑制するようにサスペンシ
ョン特性の切り替えを制御する手段と、制御系の故障点
検を外部から行う診断ツールと通信する手段を備えるサ
スペンション装置において、横加速度の検出信号に基づ
きその水平状態での出力値を学習する手段と、この学習
値からロール制御の入力信号としての横加速度の検出信
号を補正する手段と、診断ツールからの表示要求信号に
応じて補正後の横加速度と補正前の横加速度を選択的に
送信する手段を設けたことを特徴とする車両のサスペン
ション装置。
1. A means for switching suspension characteristics of a vehicle, a means for detecting lateral acceleration of a vehicle body, a means for controlling switching of the suspension characteristics so as to suppress rolling of the vehicle body based on the detection signal, and a control system. In a suspension device equipped with a means for communicating with a diagnostic tool for externally performing a failure check, the means for learning the output value in the horizontal state based on the detection signal of the lateral acceleration, and the learning value as an input signal for roll control. A vehicle suspension characterized by providing means for correcting a lateral acceleration detection signal and means for selectively transmitting the corrected lateral acceleration and the uncorrected lateral acceleration in response to a display request signal from a diagnostic tool. apparatus.
【請求項2】 車両のサスペンション特性を切り替える
手段と、車体の横加速度を検出する手段と、その検出信
号に基づいて車体のロールを抑制するようにサスペンシ
ョン特性の切り替えを制御する手段と、制御系の故障点
検を外部から行う診断ツールと通信する手段を備えるサ
スペンション装置において、横加速度の検出信号に基づ
きその水平状態での出力値を学習する手段と、この学習
値からロール制御の入力信号としての横加速度の検出信
号を補正する手段と、車速を検出する手段と、その検出
信号から停車中か走行中かを判定する手段と、診断ツー
ルからの表示要求信号を受信すると判定結果に応じて走
行中は補正後の横加速度を、停車中は補正前の横加速度
を送信する手段を設けたことを特徴とする車両のサスペ
ンション装置。
2. A means for switching suspension characteristics of the vehicle, a means for detecting lateral acceleration of the vehicle body, a means for controlling switching of the suspension characteristics so as to suppress rolling of the vehicle body based on the detection signal, and a control system. In a suspension device equipped with a means for communicating with a diagnostic tool for externally performing a failure check, the means for learning the output value in the horizontal state based on the detection signal of the lateral acceleration, and the learning value as an input signal for roll control. A means for correcting the lateral acceleration detection signal, a means for detecting the vehicle speed, a means for determining whether the vehicle is stopped or running based on the detection signal, and a vehicle for traveling according to the determination result when the display request signal from the diagnostic tool is received. A suspension device for a vehicle, which is provided with means for transmitting the lateral acceleration after correction inside and the lateral acceleration before correction during stopping.
JP11733895A 1995-05-16 1995-05-16 Vehicle suspension system Expired - Fee Related JP3821500B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11733895A JP3821500B2 (en) 1995-05-16 1995-05-16 Vehicle suspension system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11733895A JP3821500B2 (en) 1995-05-16 1995-05-16 Vehicle suspension system

Publications (2)

Publication Number Publication Date
JPH08310216A true JPH08310216A (en) 1996-11-26
JP3821500B2 JP3821500B2 (en) 2006-09-13

Family

ID=14709247

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11733895A Expired - Fee Related JP3821500B2 (en) 1995-05-16 1995-05-16 Vehicle suspension system

Country Status (1)

Country Link
JP (1) JP3821500B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016089900A (en) * 2014-10-31 2016-05-23 日立オートモティブシステムズ株式会社 Damping force adjustment type damper and vehicle system using same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016089900A (en) * 2014-10-31 2016-05-23 日立オートモティブシステムズ株式会社 Damping force adjustment type damper and vehicle system using same

Also Published As

Publication number Publication date
JP3821500B2 (en) 2006-09-13

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