JPS6337726B2 - - Google Patents
Info
- Publication number
- JPS6337726B2 JPS6337726B2 JP58155601A JP15560183A JPS6337726B2 JP S6337726 B2 JPS6337726 B2 JP S6337726B2 JP 58155601 A JP58155601 A JP 58155601A JP 15560183 A JP15560183 A JP 15560183A JP S6337726 B2 JPS6337726 B2 JP S6337726B2
- Authority
- JP
- Japan
- Prior art keywords
- sensor
- detects
- disconnection
- output signal
- voltage
- 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.)
- Expired
Links
- 239000000725 suspension Substances 0.000 claims description 25
- 238000001514 detection method Methods 0.000 claims description 15
- 230000001133 acceleration Effects 0.000 claims description 5
- 230000005856 abnormality Effects 0.000 claims description 2
- 239000006096 absorbing agent Substances 0.000 description 7
- 230000035939 shock Effects 0.000 description 7
- 238000013016 damping Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/018—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method
- B60G17/0185—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method for failure detection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/10—Acceleration; Deceleration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/10—Acceleration; Deceleration
- B60G2400/106—Acceleration; Deceleration longitudinal with regard to vehicle, e.g. braking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/30—Propulsion unit conditions
- B60G2400/34—Accelerator pedal position
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/10—Damping action or damper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/20—Spring action or springs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2800/00—Indexing 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
- B60G2800/22—Braking, stopping
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Description
〔発明の技術分野〕
本発明はシヨツクアブソーバの減衰力および車
体の懸架ばねのばね定数等の懸架特性を切換可能
な自動車の懸架装置に係り、懸架特性切換情報を
提供する各センサからのセンサ出力信号線の断線
時には減衰力およびばね定数等の懸架特性をフエ
ールセーフ側、すなわち操縦安定性に優れたハー
ド状態に固定するようにした懸架装置に関するも
のである。
〔従来技術〕
自動車において、乗りごこちを向上させようと
思えばサスペンシヨンの減衰力およびばね定数を
小さく（以後これをソフト状態という）し、逆に
操縦安定性を高めようと思えば減衰力およびばね
定数を大きく（以後これをハード状態という）し
なければならなく、乗りごこちの向上と操縦安定
性の向上というのは相反する立場にあつた。しか
し最近エレクトロニクスの発達によつて、自動車
の走行状態を各種センサによつて検知し、サスペ
ンシヨンを通常は乗りごこち重視のソフト状態
に、また自動車の急激な挙動変化の検知または予
測する各種センサのうち、少なくとも１つ以上の
センサからの出力信号によつてハード状態にする
装置が開発されている。しかし、この装置におい
て、例えばセンサからのセンサ出力信号線の断線
時には車体の急激な挙動変化の際にもセンサ信号
が制御装置に入力されないためサスペンシヨンが
ハード状態にならず操縦安定性が損なわれる恐れ
がある。
〔発明の概要〕
本発明は上記欠点を除去する為のもので、断線
検出回路によつて各センサからのセンサ出力信号
線を常時監視し、断線時には強制的にサスペンシ
ヨンをハード状態にすることによつて操縦安定性
を確保するようにしたものである。
〔発明の実施例〕
第１図は本発明の一実施例の懸架装置の構成図
で、図中１は制御装置で、車体の前後、左右、上
下のうち少なくとも何れか一方向の加速度を検出
する加速度センサ２、操舵角センサ１２、車速セ
ンサ３、シフト位置検出センサ１６、ブレーキ操
作検出センサ１７およびアクセル開度センサ１８
からの出力情報に応じて、シヨツクアブソーバ５
の中の可変オリフイス６及び空気ばね９の連結通
路１０の開閉を行う。４は車体、７は車輪、８は
アーム、９は空気ばねで室Ａ９ａ及び室Ｂ９ｂよ
り成り、連結通路１０を開けると室Ａ９ａと室Ｂ
９ｂとが連結され、ばね定数が小さく柔かくな
る。逆に連結通路１０を閉じるとばね定数が大き
く固くなる。１１は補助ばねである。５はシヨツ
クアブソーバで、シヨツクアブソーバ内の油の通
路のオリフイス６の径をアクチユエータにより大
に切換えると、減衰率は小さく、逆にオリフイス
６の径を小に切換えると減衰率は大に切換わる。
ここで、１５は断線検出回路で、上記各センサ
２，３，１２，１６，１７，１８の出力信号線を
常時監視し、センサ出力信号線の断線検出時には
制御装置１へ断線信号を出力し、センサ出力の有
無にかかわらずシヨツクアブソーバ５および空気
ばね９の減衰率を切換え、常にハード状態に保持
する。
第２図に断線検出回路の一例を示す。１９はセ
ンサで出力回路２０はノーマルオープンのスイツ
チ素子とする。２１は断線検出抵抗R1で、抵抗
R2２３との分圧によつて入力電圧V1を決定する。
この入力電圧V1を基準電圧Vref１およびVref２と
比較することによつてコンパレータ２４によつて
センサ１９のオン−オフを、コンパレータ２５に
よつてセンサ出力信号線２６の断線を検出する。
次に基準電圧の設定法について述べる。まずセン
サ出力信号線が断線していない正常時のセンサの
オン−オフ判定はコンパレータ２４によつて行
う。センサ１９がオン時の入力電圧をV1ONとし、
センサオフ時の入力電圧をV1OFFとすると、基準
電圧Vref１を、V1ON＜Vref１（V1ON＋V1OFF）／
２＜V1OFFとなるように設定することによつてコ
ンパレータ２４によりセンサのオン−オフを検出
することができる。次に断線時の入力電圧を
V1cutとすると基準電圧Vref２を
V1OFF＜Vref２
（V1OFF＋V1cut）／２＜V1cut
となるように設定することによつてコンパレータ
２５によりセンサ出力信号線の断線を検出するこ
とができる。ここで入力電圧V1ON，V1OFF，V1cut
は電源電圧V0、抵抗R1２１、R2２３によつて決
まり、これらを適切に設定することことによつて
容易に基準電圧Vref１，Vref２を設定することが
できる。第３図に入力電圧V1ON，V1OFF，V1cutお
よび基準電圧Vref１，Vref２の関係を示す。
なお、上記実施例の説明ではセンサ出力信号断
線検出時にはサスペンシヨンをハード状態に固定
したが、何らかの警告手段によつて運転者に異常
を知らしめることを併せて行なうようにしてもよ
い。
〔発明の効果〕
以上のようにこの発明によれば、懸架特性を切
換える切換機構を備えた懸架装置において、セン
サ出力信号線の断線時にサスペンシヨンをハード
状態に固定することによつて、車体の急激な挙動
変化時にセンサからの信号が入力されなくても操
縦安定性を損なうことのない安全性の高い懸架装
置を提供することができる。
[Technical Field of the Invention] The present invention relates to an automobile suspension system that is capable of switching suspension characteristics such as the damping force of a shock absorber and the spring constant of a suspension spring of a vehicle body, and relates to a suspension system for an automobile that is capable of switching suspension characteristics such as a damping force of a shock absorber and a spring constant of a suspension spring of a vehicle body. The present invention relates to a suspension system that fixes suspension characteristics such as damping force and spring constant to a fail-safe side, that is, to a hard state with excellent handling stability when a signal line is disconnected. [Prior art] In automobiles, if you want to improve riding comfort, you reduce the damping force and spring constant of the suspension (hereinafter referred to as a soft state), and conversely, if you want to improve steering stability, you reduce the damping force and spring constant. The spring constant had to be increased (hereinafter referred to as the hard state), and improving riding comfort and improving steering stability were in conflicting positions. However, with the recent development of electronics, various sensors are used to detect the driving state of a car, and the suspension is usually set to a soft state that emphasizes riding comfort, and various sensors are used to detect or predict sudden changes in the car's behavior. Among them, a device has been developed that is set to a hard state using an output signal from at least one sensor. However, with this device, if the sensor output signal line from the sensor is disconnected, the sensor signal will not be input to the control device even when the vehicle's behavior changes suddenly, so the suspension will not go into a hard state and steering stability will be impaired. There is a fear. [Summary of the Invention] The present invention is intended to eliminate the above-mentioned drawbacks.The present invention constantly monitors the sensor output signal line from each sensor using a disconnection detection circuit, and in the event of a disconnection, the suspension is forced into a hard state. This ensures steering stability. [Embodiment of the Invention] Fig. 1 is a configuration diagram of a suspension system according to an embodiment of the present invention. In the figure, 1 is a control device that detects acceleration in at least one of the longitudinal, lateral, and vertical directions of the vehicle body. acceleration sensor 2, steering angle sensor 12, vehicle speed sensor 3, shift position detection sensor 16, brake operation detection sensor 17, and accelerator opening sensor 18
Shock absorber 5
The variable orifice 6 and the connecting passage 10 of the air spring 9 are opened and closed. 4 is a vehicle body, 7 is a wheel, 8 is an arm, and 9 is an air spring, which consists of a chamber A9a and a chamber B9b. When the connecting passage 10 is opened, a chamber A9a and a chamber B are connected.
9b is connected, and the spring constant becomes small and soft. Conversely, when the connecting passage 10 is closed, the spring constant becomes large and stiff. 11 is an auxiliary spring. Reference numeral 5 denotes a shock absorber, and when the diameter of the orifice 6 in the oil passage in the shock absorber is changed to a large one by an actuator, the attenuation rate becomes small, and conversely, when the diameter of the orifice 6 is changed to a small one, the attenuation rate is switched to a large one. Here, 15 is a disconnection detection circuit that constantly monitors the output signal lines of the sensors 2, 3, 12, 16, 17, and 18, and outputs a disconnection signal to the control device 1 when a disconnection of the sensor output signal line is detected. , the damping rates of the shock absorber 5 and the air spring 9 are switched regardless of the presence or absence of the sensor output, and are always kept in the hard state. FIG. 2 shows an example of a disconnection detection circuit. 19 is a sensor, and the output circuit 20 is a normally open switch element. 21 is the disconnection detection resistor R1, which is a resistor
The input voltage V 1 is determined by voltage division with R223.
By comparing this input voltage V 1 with reference voltages V ref 1 and V ref 2, the comparator 24 detects whether the sensor 19 is on or off, and the comparator 25 detects disconnection of the sensor output signal line 26. .
Next, we will discuss how to set the reference voltage. First, the comparator 24 determines whether the sensor is on or off during normal operation when the sensor output signal line is not disconnected. The input voltage when the sensor 19 is on is V 1ON ,
If the input voltage when the sensor is off is V 1OFF , then the reference voltage V ref 1 is V 1ON < V ref 1 (V 1ON + V 1OFF )/
By setting so that 2< V1OFF , the comparator 24 can detect whether the sensor is on or off. Next, the input voltage at the time of disconnection is
When V 1cut is set, the reference voltage V ref 2 is set so that V 1OFF < V ref 2 (V 1OFF + V 1cut )/2 < V 1cut , and the comparator 25 detects a disconnection in the sensor output signal line. Can be done. Here, input voltage V 1ON , V 1OFF , V 1cut
is determined by the power supply voltage V 0 and the resistors R121 and R223, and by appropriately setting these, the reference voltages V ref 1 and V ref 2 can be easily set. FIG. 3 shows the relationship between the input voltages V 1ON , V 1OFF , V 1cut and the reference voltages V ref 1 and V ref 2. Incidentally, in the description of the above embodiment, the suspension is fixed in the hard state when the sensor output signal disconnection is detected, but it is also possible to notify the driver of the abnormality by some kind of warning means. [Effects of the Invention] As described above, according to the present invention, in a suspension system equipped with a switching mechanism for switching suspension characteristics, the suspension is fixed in the hard state when the sensor output signal line is disconnected, thereby improving the stability of the vehicle body. It is possible to provide a highly safe suspension system that does not impair steering stability even if a signal from a sensor is not input during a sudden change in behavior.
第１図は本発明の一実施例を示す基本構成図、
第２図は断線検出回路の一例を示す構成図、第３
図は入力電圧および基準電圧の関係を示す図であ
り、図中１は制御装置、２は加速度センサ、３は
車速センサ、４は車体、５はシヨツクアブソー
バ、６は可変オリフイス、７は車輪、９は空気ば
ね、１０は連結通路、１１は補助ばね、１２は操
舵角センサ、１５は断線検出回路、１６はシフト
位置検出センサ、１７はブレーキ操作検出セン
サ、１８はアクセル開度センサ、１９はセンサ、
２０はセンサ出力回路、２１は断線検出用抵抗、
２２は制御回路、２３は抵抗、２４，２５はコン
パレータ、２６はセンサ出力信号線である。
FIG. 1 is a basic configuration diagram showing an embodiment of the present invention;
Figure 2 is a configuration diagram showing an example of a disconnection detection circuit;
The figure shows the relationship between input voltage and reference voltage. In the figure, 1 is a control device, 2 is an acceleration sensor, 3 is a vehicle speed sensor, 4 is a vehicle body, 5 is a shock absorber, 6 is a variable orifice, 7 is a wheel, 9 is an air spring, 10 is a connecting passage, 11 is an auxiliary spring, 12 is a steering angle sensor, 15 is a disconnection detection circuit, 16 is a shift position detection sensor, 17 is a brake operation detection sensor, 18 is an accelerator opening sensor, 19 is sensor,
20 is a sensor output circuit, 21 is a resistance for disconnection detection,
22 is a control circuit, 23 is a resistor, 24 and 25 are comparators, and 26 is a sensor output signal line.
Claims (1)
度を検出する加速度センサ、ステアリングの舵角
を検出する操舵角センサ、スロツトル開度を検出
するスロツトル開度センサ、車速を検出する車速
センサ、ブレーキ操作を検出するブレーキ操作検
出センサ、およびシフト位置検出センサのうち少
なくとも何れか１つと、上記各センサからの出力
に応じて上記懸架特性を切換える制御回路とを備
えた懸架装置において、上記各センサから上記制
御回路へのセンサ出力信号線の断線状態を検出
し、断線信号を出力する断線検出回路を設け、断
線状態を検出した時には上記懸架特性をハード状
態に切換えるようにしたことを特徴とする自動車
の懸架制御装置。 ２ センサ出力信号線の断線時には警告ランプも
しくは他の警告手段によつて運転者に異常を知ら
せることを特徴とする特許請求の範囲第１項記載
の自動車の懸架制御装置。 ３ 断線検出回路が、基準電圧を正常時のセンサ
がオンの時の電圧とオフの時の電圧の中間とし、
センサのオン−オフを検出する第１の比較器と、
基準電圧を正常時のセンサがオフの時の電圧とセ
ンサ出力信号線の断線時の電圧の中間にあり、セ
ンサ出力信号線の断線を検出する第２の比較器と
から構成されていることを特徴とする特許請求の
範囲第１項記載の自動車の懸架制御装置。[Claims] 1. A switching mechanism that switches suspension characteristics, an acceleration sensor that detects the acceleration of the vehicle body, a steering angle sensor that detects the steering angle, a throttle opening sensor that detects the throttle opening, and a throttle opening sensor that detects the vehicle speed. A suspension system comprising at least one of a vehicle speed sensor, a brake operation detection sensor that detects brake operation, and a shift position detection sensor, and a control circuit that switches the suspension characteristics according to outputs from each of the sensors, A disconnection detection circuit is provided to detect disconnection of the sensor output signal line from each sensor to the control circuit and output a disconnection signal, and when a disconnection is detected, the suspension characteristics are switched to the hard state. Features of automobile suspension control device. 2. An automobile suspension control system according to claim 1, characterized in that when the sensor output signal line is disconnected, a warning lamp or other warning means is used to notify the driver of the abnormality. 3. The disconnection detection circuit sets the reference voltage to be between the voltage when the sensor is on and the voltage when the sensor is off during normal operation,
a first comparator that detects on-off of the sensor;
The reference voltage is set between the voltage when the sensor is normally off and the voltage when the sensor output signal line is disconnected, and it is composed of a second comparator that detects the disconnection of the sensor output signal line. An automobile suspension control device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15560183A JPS6047710A (en) | 1983-08-24 | 1983-08-24 | Suspension control unit of car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15560183A JPS6047710A (en) | 1983-08-24 | 1983-08-24 | Suspension control unit of car |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6047710A JPS6047710A (en) | 1985-03-15 |
| JPS6337726B2 true JPS6337726B2 (en) | 1988-07-27 |
Family
ID=15609585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15560183A Granted JPS6047710A (en) | 1983-08-24 | 1983-08-24 | Suspension control unit of car |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6047710A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60244609A (en) * | 1984-05-17 | 1985-12-04 | Mazda Motor Corp | Suspension of automobile |
| JP2511816Y2 (en) * | 1990-02-13 | 1996-09-25 | 株式会社東海理化電機製作所 | Front wheel rudder angle monitor |
| IT1245490B (en) * | 1990-07-27 | 1994-09-27 | Orlando Bonavigo | DEVICE FOR THE VERIFICATION OF THE SENSORS AND REGULARITY OF ELECTRICAL CONNECTIONS IN VEHICLE SYSTEMS |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5697110A (en) * | 1979-12-29 | 1981-08-05 | Koyo Seiko Co Ltd | Step motor controller in flow controller for speed sensing type power steering device |
| JPS5830541A (en) * | 1981-07-21 | 1983-02-23 | Toyota Motor Corp | Variable shock absorber |
| JPS5849507A (en) * | 1981-09-18 | 1983-03-23 | Aisin Seiki Co Ltd | Car height control unit |
| JPS59186708A (en) * | 1983-02-28 | 1984-10-23 | Mazda Motor Corp | Suspension for automobile |
-
1983
- 1983-08-24 JP JP15560183A patent/JPS6047710A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5697110A (en) * | 1979-12-29 | 1981-08-05 | Koyo Seiko Co Ltd | Step motor controller in flow controller for speed sensing type power steering device |
| JPS5830541A (en) * | 1981-07-21 | 1983-02-23 | Toyota Motor Corp | Variable shock absorber |
| JPS5849507A (en) * | 1981-09-18 | 1983-03-23 | Aisin Seiki Co Ltd | Car height control unit |
| JPS59186708A (en) * | 1983-02-28 | 1984-10-23 | Mazda Motor Corp | Suspension for automobile |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6047710A (en) | 1985-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5632503A (en) | Method for allowing enhanced driver selection of suspension damping and steering efforts | |
| JPS6047709A (en) | Suspension device of car | |
| JPH0316282B2 (en) | ||
| JPH0238123A (en) | Damping force control device for shock absorber | |
| JPS6337726B2 (en) | ||
| JPH07172128A (en) | Damping characteristics controller for vehicular shock absorber | |
| JPH01141113A (en) | Shock absorber control device | |
| JPH0319447Y2 (en) | ||
| JPS6240204B2 (en) | ||
| JPH0437792Y2 (en) | ||
| KR920019560A (en) | Suspension System of Vehicle | |
| KR100226635B1 (en) | Fuzzy adaptive control suspension system for a vehicle | |
| JPH0521766B2 (en) | ||
| KR100397264B1 (en) | Electronic suspension apparatus | |
| KR20000055865A (en) | Electronic suspension apparatus | |
| KR970036093A (en) | Automotive Cruise Control System | |
| KR19990056649A (en) | 현 Suspension mode control method of absorber and device | |
| JPH0358922B2 (en) | ||
| JP3011906U (en) | Damping force control device for shock absorber | |
| JPH03227712A (en) | Vehicle suspension controlling device | |
| JPH06270637A (en) | Suspension control device | |
| JPH03193522A (en) | Suspension device | |
| JPH02106418A (en) | Vehicle suspension control device | |
| JPH08295115A (en) | Suspension control device for tractor | |
| JPS62120235A (en) | Constant speed traveling device for automobile |