JPH01141110A - Car height adjustment control method - Google Patents

Car height adjustment control method

Info

Publication number
JPH01141110A
JPH01141110A JP29748387A JP29748387A JPH01141110A JP H01141110 A JPH01141110 A JP H01141110A JP 29748387 A JP29748387 A JP 29748387A JP 29748387 A JP29748387 A JP 29748387A JP H01141110 A JPH01141110 A JP H01141110A
Authority
JP
Japan
Prior art keywords
value
vehicle height
car height
car
control
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
JP29748387A
Other languages
Japanese (ja)
Inventor
Nobuyuki Endo
遠藤 宣行
Kenji Yoshida
憲治 吉田
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.)
KYB Corp
Original Assignee
Kayaba Industry 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 Kayaba Industry Co Ltd filed Critical Kayaba Industry Co Ltd
Priority to JP29748387A priority Critical patent/JPH01141110A/en
Publication of JPH01141110A publication Critical patent/JPH01141110A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00Resilient 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
    • B60G17/015Resilient 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
    • B60G17/0152Resilient 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
    • B60G17/0155Resilient 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 pneumatic unit
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10Type of spring
    • B60G2202/15Fluid spring
    • B60G2202/152Pneumatic spring
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/20Speed
    • B60G2400/204Vehicle speed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/25Stroke; Height; Displacement
    • B60G2400/252Stroke; Height; Displacement vertical
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/80Exterior conditions
    • B60G2400/82Ground surface
    • B60G2400/821Uneven, rough road sensing affecting vehicle body vibration
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2500/00Indexing codes relating to the regulated action or device
    • B60G2500/30Height or ground clearance
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2600/00Indexing codes relating to particular elements, systems or processes used on suspension systems or suspension control systems
    • B60G2600/02Retarders, delaying means, dead zones, threshold values, cut-off frequency, timer interruption
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/16Running
    • B60G2800/162Reducing road induced vibrations

Landscapes

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

Abstract

PURPOSE:To enhance control accuracy by determining value varying in the porality to be input according to a car height value bordering a dead zone corresponding to a car height objective value, counting the above mentioned value corresponding to the car height value detected every predetermined time and performing car height control by comparing the discrete value with the setting value. CONSTITUTION:Based on the output signals of car height sensors 30a and 30b for detecting the car height of the front wheel side and rear wheel side, air valves 19 and 20 are controlled by means of a controller 29 for car height adjustment. This supplies and exhausts compressed air to and from air chambers 15 to 18 for adjusting the car height. In this case, a dead zone having upper and lower limit as objective car speed is set to determine the value (+1, -1) varying in the porality to be input according to the car height. This value corresponding to the car height detected every predetermined time is counted one by one for computing the total number of counting which takes the value from 0 to the first setting value. When the value reaches the first setting value, the car height control starts and when the latest total number of counting reaches the second setting value (less than the first setting value), the car height control can be completed.

Description

【発明の詳細な説明】 (産業上の利用分gF) 本発明は自動車の車高調整に必要なデータを検出処理し
、車高を好適に維持することができる車高調整の制御方
法に関する。
DETAILED DESCRIPTION OF THE INVENTION (Industrial Application gF) The present invention relates to a vehicle height adjustment control method capable of detecting and processing data necessary for adjusting the vehicle height of an automobile and maintaining the vehicle height suitably.

(従来の技術) 従来の車高調整制御方法としては、車高目標値と車高検
出データの平均値とを比較し、そのデータに基づいて車
高調整制御をする方法があった。
(Prior Art) As a conventional vehicle height adjustment control method, there is a method of comparing a vehicle height target value with an average value of vehicle height detection data, and performing vehicle height adjustment control based on the data.

この方法は、例えば第6図に示すように、車高センサか
ら車高をアナログ量として検出し、この検出車高はA/
D変換され、サンプル間隔Δtにて連続したディジタル
量として収り込まれる。そして、一定時間T内のn個の
データ(X、〜Xn)の平均Xnを算出し、続いて最新
検出車高Xn口を収り込むとともに旧データを廃棄し、
データ数を一定に保持して次の平均1iiXn++を算
出し、逐次更新しながら算出された平均車高Xn、Xn
+t。
In this method, for example, as shown in FIG. 6, the vehicle height is detected as an analog quantity from a vehicle height sensor, and this detected vehicle height is
The data is converted into D and stored as a continuous digital quantity at a sample interval Δt. Then, calculate the average Xn of n pieces of data (X, ~Xn) within a certain time T, then adjust the latest detected vehicle height Xn and discard the old data
Calculate the next average 1iiXn++ while keeping the number of data constant, and calculate the average vehicle height Xn, Xn while updating it sequentially.
+t.

Xn+2を出力する。Outputs Xn+2.

このような平均車高に対し、不感帯を設けて目標車高X
0を設定し、この上限設定値をH0下限設定値をLとす
る。この目標設定後、車高制御回路では、第7図に示す
ように、逐次更新検出車高値Xiを収り込み、上下設定
値H,Lとの比較が行われる。そして、この検出値Xi
が下限設定値より小なる場合には車高上昇信号回路が駆
動され、上限設定値より大なる場合には車高下降信号回
路がw/AWhされる。各信号回路では更に目標値X。
Target vehicle height
0, and the upper limit set value is set to H0, and the lower limit set value is set to L. After setting this target, the vehicle height control circuit sequentially adjusts the updated detected vehicle height value Xi and compares it with the upper and lower set values H and L, as shown in FIG. Then, this detected value Xi
When is smaller than the lower limit set value, the vehicle height increase signal circuit is driven, and when it is greater than the upper limit set value, the vehicle height lower signal circuit is activated w/AWh. Each signal circuit also has a target value X.

との比較が行われ、目標車高x0に達成していない限り
駆動が継続され、目標車高X0に達すると停止回路が働
くのである(特開昭60−185610号公報参照)。
The drive is continued until the target vehicle height x0 is reached, and when the target vehicle height X0 is reached, the stop circuit is activated (see Japanese Patent Laid-Open No. 185610/1983).

(発明が解決しようとする問題点) しかしながら、上記従来の車高調整制御方法によると、
車高目標値と車高検出データの平均値とを比較し、車高
目標値と車高検出データの平均値が一致した段階で車高
調整を終了するので、車高調整終了時に於いて目標値を
行き過ぎ、その分修正が必要となり、ハンチングの原因
となるという問題点があった。
(Problems to be Solved by the Invention) However, according to the above conventional vehicle height adjustment control method,
The vehicle height target value and the average value of the vehicle height detection data are compared, and the vehicle height adjustment is completed when the vehicle height target value and the average value of the vehicle height detection data match. There was a problem in that the value was set too high, requiring correction accordingly, which caused hunting.

本発明は上記実情に鑑みてなされたもので、車高の予測
制御を行うことにより車高Il′!Iiの精度の向上を
図ることができる車高調整制御方法を提供することを目
的とする。
The present invention has been made in view of the above-mentioned circumstances, and by performing predictive control of the vehicle height, the vehicle height Il'! An object of the present invention is to provide a vehicle height adjustment control method that can improve the accuracy of Ii.

(問題点を解決するための手段) 上記従来例の問題点を解消するため、本発明に係る車高
調整制御方法は次のようになされる。
(Means for Solving the Problems) In order to solve the problems of the conventional example, the vehicle height adjustment control method according to the present invention is performed as follows.

車高目器値に対して設けた不感帯を境に、車高値によっ
て読み込む極性が異なる値を予め定める。
A value with a different polarity to be read depending on the vehicle height value is predetermined, with a dead zone provided for the vehicle height indicator value as a boundary.

一定時間毎に車高値を検出すると共にこの車高値に該当
する前記値を逐次カウントし、0から第1の設定値まで
の値をとるカウント総数を算出する。
The vehicle height value is detected at regular intervals, and the values corresponding to the vehicle height value are sequentially counted, and the total number of counts ranging from 0 to the first set value is calculated.

カウント総数が第1の設定値に達したら車高制御を開始
し、これにより車高が変化し、酋新カウント総数が第1
の設定値より小なる第2の設定値に達したとき車高制御
を終了する。
When the total number of counts reaches the first set value, vehicle height control is started, which changes the vehicle height, and the total number of new counts reaches the first set value.
When a second set value smaller than the set value is reached, vehicle height control is ended.

(作用) 本発明は上記のように構成したので、車高目標値と車高
検出データとを直接比較するのでなく、前記カウント総
数が目標値に対して予め決めた設定値に達したか否かに
より車高制御を開始又は終了する予測制御を行なう。
(Function) Since the present invention is configured as described above, the vehicle height target value and the vehicle height detection data are not directly compared, but whether the total count has reached a predetermined set value with respect to the target value is determined. Predictive control is performed to start or end vehicle height control depending on the situation.

(実施例) 本発明の一実施例について図面を参照しながら説明する
(Example) An example of the present invention will be described with reference to the drawings.

第2図に実施例が適用される車両のエアサスペンション
について示す。
FIG. 2 shows an air suspension for a vehicle to which the embodiment is applied.

車体と車輪との間に介在させる前輪用ショックアブソー
バ11.12.及び後輪用ショックアブソーバ13.1
4の上部に、それぞれ空気室15゜16.17.18を
設けて空気ばねを形成する。
Front wheel shock absorber interposed between the vehicle body and the wheels 11.12. and rear wheel shock absorber 13.1
4 are provided with air chambers 15, 16, 17, and 18, respectively, to form air springs.

これらの空気室15.16.17.18は、前輪の車高
調整用の空気弁19もしくは後輪の車高調整用の空気弁
20に通じ、これらの空気弁19゜20は空気配管21
を介してニアコンプレッサ22に接続されている。空気
配管21には、圧縮空気中の水分を除去するドライヤ2
3及び残圧弁24を接続すると共に、アキュムレータ2
5内の空気を空気配管21内に供給するための給気弁2
6と、空気配管21内の圧縮空気を外部に排出するため
の排気弁27及びフィルタ28が接続されている。
These air chambers 15, 16, 17, 18 communicate with an air valve 19 for adjusting the vehicle height of the front wheels or an air valve 20 for adjusting the vehicle height of the rear wheels.
It is connected to the near compressor 22 via. The air pipe 21 includes a dryer 2 that removes moisture from compressed air.
3 and the residual pressure valve 24, and the accumulator 2
Air supply valve 2 for supplying air in air pipe 21 into air pipe 21
6 is connected to an exhaust valve 27 and a filter 28 for discharging the compressed air in the air pipe 21 to the outside.

車高調整用コントローラ29に、前輪側の車高を検知す
る車高センサ30a及び後輪側の車高を検知する車高セ
ンサ30b等からの信号が入力され、これらの信号から
車高調整制御信号が算出され空気弁19.20.給気弁
26.排気弁27の弁の開閉を制御する。そして、空気
弁19.20を介して圧縮空気が空気室15.16.1
7.18に注入もしくは排出されることにより車高を上
下に動かす車高調整を行なう。
Signals from a vehicle height sensor 30a that detects the vehicle height of the front wheels, a vehicle height sensor 30b that detects the vehicle height of the rear wheels, etc. are input to the vehicle height adjustment controller 29, and vehicle height adjustment control is performed based on these signals. Signals are calculated and air valves 19.20. Air supply valve 26. Controls the opening and closing of the exhaust valve 27. The compressed air is then supplied to the air chamber 15.16.1 via the air valve 19.20.
7. The vehicle height is adjusted by moving the vehicle height up or down by injecting or discharging it at 18.

このようなサスペンション機構を有する車両において、
前記車高センサは車体と車輪又は車軸との間の車高が変
化すると、車高に応じたコードが検出信号として出力さ
れる。すなわち、車高変化が第3図に示すようなときに
、−目標車高X。とじて不感帯を設け、上限設定値をH
1下限設定値をLとすると、車高センサからの検出信号
は上限設定値ト■より高いaの範囲、不感帯域であるb
の範囲、下限設定値しより低いCの範囲の3通りについ
て出力される。
In a vehicle having such a suspension mechanism,
When the vehicle height between the vehicle body and a wheel or axle changes, the vehicle height sensor outputs a code corresponding to the vehicle height as a detection signal. That is, when the vehicle height changes as shown in FIG. 3, -target vehicle height X. and set a dead zone, and set the upper limit setting to H.
1. If the lower limit set value is L, the detection signal from the vehicle height sensor is in the range a higher than the upper limit set value g, which is the dead band b
The range is output in three ways: the lower limit setting value and the lower C range.

車高の上昇を行なう車高フロント上昇制御について第1
図のフローチャートを参照しながら説明する。
Part 1 regarding vehicle height front elevation control to increase vehicle height
This will be explained with reference to the flowchart shown in the figure.

先ず、車高値をある一定時間Δt(バネ下共振付近まで
サンプリング可能な値とする)毎に検出する。そして、
車高値が前記Cの範囲であれば(+1)を、b若しくは
aの範囲であれば(−1)を車高調整用コントローラ2
9内に設けたフロント上げ動作用計数器で逐次カウント
する。車高上昇制御においては、車高目標値に対して設
けた不感帯の下限設定値りを境界として、車高値によっ
て極性が異なる値である(+1)、(−1)を読み込む
のである。
First, the vehicle height value is detected every certain period of time Δt (a value that can be sampled up to the vicinity of unsprung resonance). and,
If the vehicle height value is in the range C, set it as (+1), and if it is in the range b or a, set it as (-1) in the vehicle height adjustment controller 2.
The counter for front raising operation provided in 9 counts sequentially. In vehicle height increase control, values (+1) and (-1) whose polarity differs depending on the vehicle height value are read, with the lower limit set value of the dead zone provided for the vehicle height target value as the boundary.

すなわち、車高が第3図のように変化するとき、α領域
でく+1)をカウントし、β領域で(−1)をカウント
する。従って、α領域ではカウント総数nがΔを時間毎
に1つづ増加し、β領域ではカウント総数nがΔを時間
毎に1つづ減少する。ただし、カウント総数nが(0)
以下になる場合にはカウントせずn=oを維持する。
That is, when the vehicle height changes as shown in FIG. 3, +1) is counted in the α area, and (-1) is counted in the β area. Therefore, in the α region, the total count n increases Δ by one every time, and in the β region, the total count n decreases Δ by one every time. However, the total number of counts n is (0)
If it is below, it is not counted and n=o is maintained.

そして、カウント総数nが車高目標値に対して予め定め
た設定値であるNuに達したら、車高の上げ動作を行な
う車高制御を開始する。従って、車高が下限設定値しよ
り低い状態がある程度続かないと(NuXΔを時間)車
高の上げ動作を開始しないのである。また、カウント総
数nがNu以上になる場合にはこれ以上カウントせずn
=Nuを維持する。
Then, when the total count n reaches Nu, which is a predetermined set value for the vehicle height target value, vehicle height control for raising the vehicle height is started. Therefore, the operation to raise the vehicle height is not started unless the vehicle height reaches the lower limit setting value and continues to be lower than the lower limit for a certain period of time (NuXΔ time). In addition, if the total number of counts n is greater than or equal to Nu, no further counting is performed and n
= Maintain Nu.

車高の上げ動作を開始すると車高が上昇するので、α領
域が減少しβ領域が増加する。そのため(−1)をカウ
ントする回数が増え、カウント総数nが減少する。そし
て、カウント総数nがNuより小さく定めた設定値であ
るNu′に達したとき、車高の上げ動作を終了させフロ
ント上げ動作用計数器をリセット(n=o)する。
When the vehicle height raising operation is started, the vehicle height increases, so the α area decreases and the β area increases. Therefore, the number of times (-1) is counted increases, and the total number of counts n decreases. When the total count n reaches Nu', which is a set value smaller than Nu, the vehicle height raising operation is completed and the front raising operation counter is reset (n=o).

設定値Nu′は、車高調整速度Vuと不感帯幅すから次
のように求められる。
The set value Nu' is obtained from the vehicle height adjustment speed Vu and the dead zone width as follows.

車高調整速度Vuで不感帯の1/2に要する時間t=(
b/2)/Vu 時間tの間のカウント数N=t/Δt とすると、 Nu′=Nu−N となる。
Time required to reach 1/2 of dead zone at vehicle height adjustment speed Vu = (
b/2)/Vu If the number of counts during time t is N=t/Δt, then Nu'=Nu-N.

簡易に説明するため複雑な車高変動がない場合(車両停
止時)を例にとって、車高変動と計数器のカウント総数
n及び上げ動作信号の有無についての関係を表わすと、
第4図のようになる。
To simplify the explanation, we will take as an example a case where there is no complicated vehicle height fluctuation (when the vehicle is stopped), and the relationship between the vehicle height fluctuation, the total count n of the counter, and the presence or absence of the raising operation signal will be expressed as follows.
It will look like Figure 4.

第4図の左端では、車高が下限設定値りより低いのでΔ
を時間毎に(+1)を計数器でカウントし、カウント総
数nがNuに達した(イ)の時点で車高の上げ動作が開
始する。上げ動作の開始により車高が上昇するが、車高
が下限設定値しより低いため(+1)をカウントすべき
領域である。
At the left end of Figure 4, the vehicle height is lower than the lower limit setting value, so Δ
is counted by (+1) every hour using a counter, and at the point in time (a) when the total count n reaches Nu, the vehicle height raising operation starts. The vehicle height rises with the start of the raising operation, but since the vehicle height is lower than the lower limit setting value, this is the region where (+1) should be counted.

この時カウント総数nは既にNuに達しているので、こ
れ以上カウントしない、その後、車高が下限設定値りに
等しくなる(口)の時点に達し、く−1)をカウントす
る不感帯の領域に入る。この領域では、Δを時間毎に(
−1)を計数器でカウントするのでカウント総数nが減
少する。そして、カウント総数nがN u ′に達する
(ハ)の時点で車高の上げ動作が終了し、計数器のカウ
ント総数をリセットする。
At this time, the total number of counts n has already reached Nu, so it will not be counted any more. After that, the vehicle height will reach the point (mouth) where it becomes equal to the lower limit setting value, and it will enter the dead zone region where ku-1) is counted. enter. In this region, Δ is set at each time (
-1) is counted by a counter, the total number of counts n decreases. Then, when the total count n reaches N u ' (c), the vehicle height raising operation is completed and the total count of the counter is reset.

計数器は再度カウント開始の用意をするが、この時の車
高は不感帯の中間位置(目標車高値)であり、(−1)
をカウントする状態であるが、リセット直後でカウント
総数n=oであるのでこれを維持する。
The counter prepares to start counting again, but at this time the vehicle height is at the middle position of the dead zone (target vehicle height), and is (-1).
However, since the total number of counts is n=o immediately after reset, this state is maintained.

以上は、フロント上げ動作について述べたが、車高調整
用コントローラ内には他にフロント下げ動作用計数器、
リヤ上げ動作用計数器、リヤ下げ動作用計数器、が設け
られ、それぞれ同様の作用を行なう。ただし、下げ動作
の場合には、車高目標値に対して設けた不感帯の上@設
定値Hを境界として、車高がこれより高い場合に(+1
)、低い場合にく−1)をカウントする。
The above describes the front raising operation, but the vehicle height adjustment controller also includes a front lowering operation counter,
A rear raising operation counter and a rear lowering operation counter are provided, each of which performs the same function. However, in the case of a lowering operation, if the vehicle height is higher than the upper limit of the dead zone @ set value H set for the target vehicle height value, then (+1
), if it is low, count -1).

車高調整制御において車高の上げ動作を行う場合には、
車高調整用コントローラ29より車高調整制御信号が出
力され、この信号によって前記空気弁19若しくは空気
弁20を開としてエアコンプレヅサ22を運転し、空気
をフロント側の空気室15.16若しくはリヤ側の空気
室17.18に送り込むことによって行なう、また、車
高の下げ動作を行う場合には、車高調整用コントローラ
29より車高調整制御信号が出力され、この信号によっ
て前記空気弁19若しくは空気弁20を開として排気弁
27を開弁じ、空気をフロント側の空気室15.16若
しくはリヤ側の空気室17゜18から排出させることに
よって行なう。
When raising the vehicle height in vehicle height adjustment control,
A vehicle height adjustment control signal is output from the vehicle height adjustment controller 29, and based on this signal, the air valve 19 or the air valve 20 is opened to operate the air compressor 22, and the air is supplied to the front side air chamber 15, 16 or the rear side. When lowering the vehicle height by sending air into the air chambers 17 and 18, a vehicle height adjustment control signal is output from the vehicle height adjustment controller 29, and this signal causes the air valve 19 or the air valve to be activated. 20 is opened, the exhaust valve 27 is opened, and air is discharged from the front side air chamber 15, 16 or the rear side air chamber 17, 18.

車高の上げ下げ動作を終了させるには、空気弁19.2
0を閉とする。
To end the vehicle height raising/lowering operation, press the air valve 19.2.
0 is closed.

第5図は本発明方法の他の実施例を示すものである。FIG. 5 shows another embodiment of the method of the invention.

この実施例ではフロント又はリヤの車高制御が終了した
とき、フロント上げ動作用計数器、フロント下げ動作用
計数器、リヤ上げ動作用計数器。
In this embodiment, when front or rear vehicle height control is completed, a counter for front raising operation, a counter for front lowering operation, and a counter for rear raising operation.

リヤ下げ動作用計数器、の全ての計数器のリセットを行
なうようになっている。
All counters for rear lowering operation are reset.

今、フロント上げ動作が開始したのち終了した時を考え
ると、フロント下げ動作用計数器、リヤ上げ動作用計数
器、リヤ下げ動作用計数器は、(+1)又は(−1)の
値をカウント中である。
Now, considering the time when the front raising operation starts and ends, the front lowering operation counter, the rear raising operation counter, and the rear lowering operation counter count the value of (+1) or (-1). It's inside.

しかし、このカウントデータはフロント上げ動作中のも
ので、車高が変化中のデータに基づくものである。従っ
て、このデータを継続してカウントし車高を制御すると
、車高が変化中の過去のデータが大部分合まれる値に基
づいて制御することとなる。
However, this count data is based on data while the front is being raised and the vehicle height is changing. Therefore, if this data is continuously counted and the vehicle height is controlled, the control will be based on a value that largely combines past data while the vehicle height is changing.

そこで、ある一つの動作(例えばフロント上げ動作)が
終了時において、その動作を制御するフロント上げ動作
用計数器のみでなく、他の全ての計数器をカウント中に
かかわらずリセットを行なうようにした。従って、リセ
ットされた計数器は、その時点よりあらためてカウント
を開始し、過去のデータでなく新しい車高におけるデー
タに基づいて制御することができ、車高制御の精度が更
に良好となる。
Therefore, when a certain operation (for example, front raising operation) ends, not only the front raising operation counter that controls that operation but all other counters are reset even if they are still counting. . Therefore, the reset counter starts counting again from that point on, and control can be performed based on data at the new vehicle height rather than past data, and the accuracy of vehicle height control becomes even better.

以上の実施例においては、車高を空気圧で調整する手段
で説明したが、油圧5機械式その他の動力を用いた手段
であってもよい。
In the above embodiments, the vehicle height is adjusted using pneumatic pressure, but hydraulic, mechanical, or other power-based means may be used.

(発明の効果) 本発明は、車高目標値に対して設けた不感帯を境に、車
高値によって読み込む極性が異なる値を予め定め、一定
時間毎に車高値を検出すると共にこの車高値に該当する
前記値を逐次カウントし、カウント総数がカウントの上
限である第1の設定値に達したら車高制御を開始し、こ
れにより車高が変化し、最新カウント総数が第1の設定
値より小なる第2の設定値に達したとき車高制御を終了
するよう構成し、車高目標値と車高検出データとを直接
比較するのでなく、前記カウント総数が目標値に対して
予め決めた設定値に達したか否かにより車高制御を開始
又は終了する予測制御を行なう。
(Effects of the Invention) The present invention predetermines a value whose polarity differs depending on the vehicle height value, with a dead zone set for the target vehicle height value, and detects the vehicle height value at regular intervals, and detects the value corresponding to this vehicle height value. The vehicle height control is started when the total number of counts reaches a first set value, which is the upper limit of counting, and the vehicle height changes as a result, and the latest total number of counts is smaller than the first set value. The vehicle height control is configured to end when the second set value is reached, and instead of directly comparing the vehicle height target value and the vehicle height detection data, the total count is determined by a predetermined setting with respect to the target value. Predictive control is performed to start or end vehicle height control depending on whether the value has been reached.

従って、車高の予測制御によりハンチングを防止し、車
高の修正を不要とすることにより車高調整の精度の向上
を図ることができる。
Therefore, hunting can be prevented by predictive control of the vehicle height, and the accuracy of vehicle height adjustment can be improved by eliminating the need for modifying the vehicle height.

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

第1図は本発明方法の実施例の車高上昇制御を示すフロ
ーチャート図、第2図は実施例のエアサスペンション機
構の説明図、第3図は実施例において計数器のカウント
する値と車高変化との関係を示すグラフ図、第4図は実
施例において車高変化と計数器のカウント総数及び上動
作信号の有無の関係を示す説明図、第5図は本発明方法
の他の実施例の車高上昇制御を示すフローチャート図、
第6図は従来の車高制御方法における実車高とサンプリ
ング法を示すグラフ図、第7図は従来の車高制御方法の
フローチャート図である。 11.12.13.14・・・・・・ショックアブソー
バ15.16.17.18・・・・・・空気室19.2
0・・・・・・空気弁 22・・・・・・ニアコンプレッサ 26・・・・・・給気弁 27・・・・・・排気弁 29・・・・・・車高調整用コントローラ30a、30
b・・・・・・車高センサ昭和62年11月27日 第1図 第3図 1 uハ 第5図
Fig. 1 is a flowchart showing vehicle height increase control in an embodiment of the method of the present invention, Fig. 2 is an explanatory diagram of the air suspension mechanism in the embodiment, and Fig. 3 shows the value counted by the counter and the vehicle height in the embodiment. FIG. 4 is an explanatory diagram showing the relationship between changes in vehicle height, the total count of the counter, and the presence or absence of an upward movement signal in an embodiment. FIG. 5 is another embodiment of the method of the present invention. Flowchart diagram showing vehicle height increase control of
FIG. 6 is a graph showing the actual vehicle height and sampling method in the conventional vehicle height control method, and FIG. 7 is a flowchart of the conventional vehicle height control method. 11.12.13.14... Shock absorber 15.16.17.18... Air chamber 19.2
0...Air valve 22...Near compressor 26...Air supply valve 27...Exhaust valve 29...Vehicle height adjustment controller 30a , 30
b... Vehicle height sensor November 27, 1988 Figure 1 Figure 3 Figure 1 uha Figure 5

Claims (1)

【特許請求の範囲】[Claims] 車高目標値に対して設けた不感帯を境に、車高値によつ
て読み込む極性が異なる値を予め定め、一定時間毎に車
高値を検出すると共にこの車高値に該当する前記値を逐
次カウントし、0から第1の設定値までの値をとるカウ
ント総数を算出し、カウント総数が第1の設定値に達し
たら車高制御を開始し、これにより車高が変化し、最新
カウント総数が第1の設定値より小なる第2の設定値に
達したとき車高制御を終了することを特徴とする車高調
整制御方法。
A value with a different polarity to be read depending on the vehicle height value is predetermined, with a dead zone set for the vehicle height target value as the boundary, and the vehicle height value is detected at regular intervals and the values corresponding to this vehicle height value are sequentially counted. , calculates the total count that takes a value from 0 to the first set value, and starts vehicle height control when the total count reaches the first set value, thereby changing the vehicle height and changing the latest count to the first set value. A vehicle height adjustment control method characterized in that vehicle height control is terminated when a second set value smaller than the first set value is reached.
JP29748387A 1987-11-27 1987-11-27 Car height adjustment control method Pending JPH01141110A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29748387A JPH01141110A (en) 1987-11-27 1987-11-27 Car height adjustment control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29748387A JPH01141110A (en) 1987-11-27 1987-11-27 Car height adjustment control method

Publications (1)

Publication Number Publication Date
JPH01141110A true JPH01141110A (en) 1989-06-02

Family

ID=17847084

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29748387A Pending JPH01141110A (en) 1987-11-27 1987-11-27 Car height adjustment control method

Country Status (1)

Country Link
JP (1) JPH01141110A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104334379A (en) * 2012-01-18 2015-02-04 悬挂系统股份有限公司 Hydraulic height adjusting system for a vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104334379A (en) * 2012-01-18 2015-02-04 悬挂系统股份有限公司 Hydraulic height adjusting system for a vehicle
CN104334379B (en) * 2012-01-18 2016-08-17 悬挂系统股份有限公司 System is adjusted for adjusting the hydraulic height of vehicle terrain clearance

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