JP2757071B2 - Active suspension of the vehicle - Google Patents
Active suspension of the vehicleInfo
- Publication number
- JP2757071B2 JP2757071B2 JP2221372A JP22137290A JP2757071B2 JP 2757071 B2 JP2757071 B2 JP 2757071B2 JP 2221372 A JP2221372 A JP 2221372A JP 22137290 A JP22137290 A JP 22137290A JP 2757071 B2 JP2757071 B2 JP 2757071B2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- vehicle body
- chamber
- piston
- vehicle
- 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 - Lifetime
Links
Landscapes
- Vehicle Body Suspensions (AREA)
- Fluid-Damping Devices (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、車両の車体と車輪との間に装着されて車両
走行時の車体上下振動や動揺を制御して乗心地と操縦安
定性を向上する車両のアクティブサスペンションに関す
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is mounted between a vehicle body and wheels to control the vertical vibration and shaking of the vehicle body when the vehicle is running, thereby improving ride comfort and steering stability. An improved vehicle active suspension.
車両のサスペンションＡは第２図に示すように車体１
と車輪２とに装着され、車体１と車輪２の相対的な変位
に比例して力を発生するバネ３及び車体１と車輪２の相
対的な速度に比例した減衰力を発生するダンパ４より成
っている。As shown in FIG. 2, the suspension A of the vehicle
A spring 3 that is mounted on the vehicle body 1 and the wheel 2 and generates a force in proportion to the relative displacement between the vehicle body 1 and the wheel 2 and a damper 4 that generates a damping force proportional to the relative speed between the vehicle body 1 and the wheel 2 Made up of
この様なサスペンションであると走行する路面５の凹
凸によりバネ３が伸縮し、伸縮したバネ３によって車体
１に伝わる支持力が変化するから車体１は振動を発生し
たり、各バネ３の伸縮量の差によって車体１が動揺して
姿勢が変化したりする。With such a suspension, the spring 3 expands and contracts due to the unevenness of the running road surface 5, and the supporting force transmitted to the vehicle body 1 is changed by the expanded and contracted spring 3, so that the vehicle body 1 generates vibration and the amount of expansion and contraction of each spring 3. The vehicle body 1 is shaken due to the difference between the positions, and the posture changes.
これらの車体１の振動・動揺を制御するサスペンショ
ンとして第３図に示すアクティブサスペンションＢが知
られている。An active suspension B shown in FIG. 3 is known as a suspension for controlling the vibration and sway of the vehicle body 1.
すなわち、車輪２を油圧シリンダ６で支持し、路面５
の凹凸を検知して油圧シリンダ６の伸長室6a、縮小室6b
に圧油を供給することで伸縮制御して車体１の振動・動
揺の発生を抑えるサスペンションである。That is, the wheel 2 is supported by the hydraulic cylinder 6 and the road surface 5
Of the hydraulic cylinder 6 by detecting the unevenness of the hydraulic cylinder 6
This is a suspension that controls the expansion and contraction of the vehicle body 1 by supplying pressure oil to the vehicle, thereby suppressing the occurrence of vibration and shaking of the vehicle body 1.
かかるアクティブサスペンションは車体重量を油圧シ
リンダ６の圧油で支持する構成であるから、その圧油を
発生するためのエネルギーが多大に必要となり、エンジ
ン馬力の一部をアクティブサスペンションが消費するこ
とになる。Since such an active suspension has a configuration in which the weight of the vehicle body is supported by the hydraulic oil of the hydraulic cylinder 6, a large amount of energy is required to generate the hydraulic oil, and the active suspension consumes a part of the engine horsepower. .
特に、路面凹凸の激しいオフロードを走行する車両に
おいてはエンジン馬力の大半をアクティブサスペンショ
ンが消費することになってしまう。In particular, in a vehicle running on an off-road with severe road surface irregularities, most of the engine horsepower is consumed by the active suspension.
そこで、本発明は前述の課題を解決して車体重量を支
持するために消費するエンジン馬力を低減できるように
した車両のアクティブサスペンションを提供することを
目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide an active suspension of a vehicle which solves the above-mentioned problem and reduces the engine horsepower consumed to support the weight of the vehicle.
（手段） 第１シリンダ本体11内に、ピストンロッド25を備えた
第１ピストン15を嵌挿して下部真空室16と上部大気圧室
17を有する真空圧シリンダＣとし、この第１シリンダ本
体11を車体に連結し、ピストンロッド25で車輪を支持
し、前記下部真空室16内を真空とすると共に、上部大気
圧室17を大気に開口して車体重量を上部大気圧室17の大
気圧で支持するようにし、 前記真空圧シリンダＣの第１ピストン15を伸縮する油
圧シリンダＤ、車体の揺動を検出するセンサ33、このセ
ンサ33で検出した車体の動揺により油圧シリンダＤの縮
小側油室19、伸長側油室20に圧油を供給する圧油供給機
構Ｅを設けたことを特徴とする車両のアクティブサスペ
ンション。(Means) A first piston 15 provided with a piston rod 25 is inserted into the first cylinder body 11 to form a lower vacuum chamber 16 and an upper atmospheric pressure chamber.
The first cylinder body 11 is connected to the vehicle body, wheels are supported by a piston rod 25, the lower vacuum chamber 16 is evacuated, and the upper atmospheric pressure chamber 17 is exposed to the atmosphere. The hydraulic cylinder D which expands and contracts the first piston 15 of the vacuum pressure cylinder C, the sensor 33 which detects the swing of the vehicle body, An active suspension for a vehicle, comprising a pressure oil supply mechanism E for supplying pressure oil to a contraction-side oil chamber 19 and an extension-side oil chamber 20 of a hydraulic cylinder D in response to the fluctuation of the vehicle body detected in the above.
（作用） 車体重量は真空圧シリンダＣの第１ピストン15に作用
する大気圧で支持されるから、油圧シリンダＤの縮小側
油室19、伸長側油室20内には車体重量に見合う高圧力が
発生しないので、この油圧シリンダＤの縮小側油室19、
伸長側油室20に低圧の圧力を供給することで真空圧シリ
ンダ１の第１ピストン15を伸縮作動できる。(Operation) Since the vehicle body weight is supported by the atmospheric pressure acting on the first piston 15 of the vacuum cylinder C, a high pressure commensurate with the vehicle weight is provided in the reduction-side oil chamber 19 and the extension-side oil chamber 20 of the hydraulic cylinder D. Does not occur, the reduction-side oil chamber 19 of the hydraulic cylinder D,
By supplying a low pressure to the extension-side oil chamber 20, the first piston 15 of the vacuum cylinder 1 can be extended and contracted.
また、車体が揺動すると圧油供給機構Ｅによって油圧
シリンダＤの伸長側油室、縮小側油室に圧油を供給して
真空圧シリンダＣの第１ピストン15を伸縮することで車
輪を上下させて車体の姿勢が変化しないようにできる。When the vehicle body swings, the hydraulic oil is supplied to the expansion-side oil chamber and the reduction-side oil chamber of the hydraulic cylinder D by the hydraulic oil supply mechanism E, and the first piston 15 of the vacuum cylinder C is expanded and contracted to raise and lower the wheels. Thus, the posture of the vehicle body can be prevented from changing.
したがって、車体の揺動に追従して車輪を上下動して
車体の揺動・動揺の発生を抑えることができるアクティ
ブサスペンションとなるし、油圧シリンダＤの縮小側油
室19、伸長側油室20に供給する圧油の圧力が車体重量に
見合う圧力よりも低圧となってアクティブサスペンショ
ンが消費するエンジン馬力が極く僅かとなる。Accordingly, an active suspension can be provided that can move the wheels up and down following the swinging of the vehicle body to suppress the occurrence of the swinging and shaking of the vehicle body, and the reduction-side oil chamber 19 and the extension-side oil chamber 20 of the hydraulic cylinder D. The pressure of the pressure oil supplied to the vehicle becomes lower than the pressure corresponding to the weight of the vehicle body, so that the engine horsepower consumed by the active suspension becomes extremely small.
しかも、真空圧シリンダＣを用いて大気圧によって車
体重量を支持しているから、特別な圧力媒体に用いる必
要がなく安価となるばかりか、圧力媒体の漏れによる路
面の汚れなどが発生することがない。In addition, since the weight of the vehicle body is supported by the atmospheric pressure using the vacuum pressure cylinder C, it is not necessary to use the pressure medium as a special pressure medium, and it is not only inexpensive, but also the contamination of the road surface due to the leakage of the pressure medium may occur. Absent.
第１図に示すように、シリンダ装置１は大径の第１シ
リンダ本体11と小径の第２シリンダ本体12とで大径の第
１シリンダ室13と小径の第２シリンダ室14を有し、その
第１シリンダ本体11内に第１ピストン15を嵌挿して第１
シリンダ室13を下部真空室16と上部大気圧室17に区画し
て真空圧シリンダＣを構成し、第２シリンダ本体12内に
第２ピストン18を嵌挿して第２シリンダ室14を縮小側油
室19と伸長側油室20を区画して油圧シリンダＤを構成し
ている。As shown in FIG. 1, the cylinder device 1 has a large-diameter first cylinder chamber 13 and a small-diameter second cylinder chamber 14 with a large-diameter first cylinder main body 11 and a small-diameter second cylinder main body 12. The first piston 15 is inserted into the first cylinder body 11 to
The cylinder chamber 13 is divided into a lower vacuum chamber 16 and an upper atmospheric pressure chamber 17 to form a vacuum cylinder C. A second piston 18 is inserted into the second cylinder body 12 to reduce the second cylinder chamber 14 to a reduced side oil. The hydraulic cylinder D is configured by partitioning the chamber 19 and the extension-side oil chamber 20.
前記第１シリンダ本体11には下部真空室16内の空気を
真空ポンプで排出するための空気排出口21が形成され、
この空気排出口21はプラグ22で閉塞してあり、前記第１
シリンダ本体11には大気圧室17をブリーザ23で大気に開
口する空気給排気口24が形成してある。The first cylinder body 11 is formed with an air discharge port 21 for discharging air in the lower vacuum chamber 16 with a vacuum pump,
The air outlet 21 is closed by a plug 22, and the first
An air supply / exhaust port 24 that opens the atmospheric pressure chamber 17 to the atmosphere by a breather 23 is formed in the cylinder body 11.
前記第１ピストン15はピストンロッド25を備え、この
ピストンロッド25の先端部に設けた車輪取付部26に車輪
が装着され、第１シリンダ本体11に設けた車体取付部27
が車体に取付けられてシリンダ装置１で車輪を車体に支
持している。The first piston 15 has a piston rod 25, a wheel is mounted on a wheel mounting portion 26 provided at the tip of the piston rod 25, and a vehicle mounting portion 27 provided on the first cylinder body 11.
Are mounted on the vehicle body, and the wheels are supported on the vehicle body by the cylinder device 1.
前記第１ピストン15と第２ピストン18はロッド28で連
結されている。The first piston 15 and the second piston 18 are connected by a rod 28.
図示しないエンジンで駆動される油圧ポンプ30の吐出
圧油は制御弁31で前記油圧シリンダＤの縮小側油室19、
伸長側油室20の一方に供給され、その制御弁31はコント
ローラ32よりの制御指令により切換え制御され、そのコ
ントローラ32はセンサ33で検出した車体の揺動信号で制
御指令を出力するようになって圧油供給機構Ｅを構成し
ている。The discharge pressure oil of a hydraulic pump 30 driven by an engine (not shown) is supplied to a control valve 31 by a reduction side oil chamber 19 of the hydraulic cylinder D,
The control valve 31 is supplied to one of the extension-side oil chambers 20, and its control valve 31 is switched and controlled by a control command from a controller 32. The controller 32 outputs a control command based on a vehicle body swing signal detected by a sensor 33. To form a pressure oil supply mechanism E.
しかして、真空圧シリンダＣの第１ピストン15には大
気圧室17に流入する大気圧によって押し下げ力F1が作用
し、その押し下げ力F1で車体重量Ｗを支持する。Thus, the first piston 15 of the vacuum cylinder C acts downward force F 1 by the atmospheric pressure flowing into the atmospheric pressure chamber 17, to support the vehicle weight W in the downward force F 1.
そして、路面の凹凸を走行する際にピストンロッド25
とともに車輪が車体に対して上下に変位すると車体が動
揺し、その車体動揺をセンサ33で検出してコントローラ
32に送り、制御弁31に制御信号を出力して油圧ポンプ30
の吐出圧油を油圧シリンダＤの縮小側油室19又は伸長側
油室20に供給して第２ピストン18を縮小、伸長し、ロッ
ド28を介して第１ピストン15を上下動することでピスト
ンロッド25により車輪を上下動して車体の姿勢が変化し
ないように保持する。When traveling on uneven road surfaces, the piston rod 25
When the wheels move up and down with respect to the vehicle body, the vehicle body shakes.
32, and outputs a control signal to the control valve 31 so that the hydraulic pump 30
Is supplied to the reduction-side oil chamber 19 or the expansion-side oil chamber 20 of the hydraulic cylinder D to reduce and expand the second piston 18 and to move the first piston 15 up and down via the rod 28 to thereby move the piston up and down. The wheels are moved up and down by the rods 25 to keep the posture of the vehicle body unchanged.
この時、車体重量は第１ピストン15に作用する大気圧
で支持され、その第１ピストン15が伸縮しても支持力が
一定であるから、油圧シリンダＤの第２ピストン18を伸
縮するのに要する力は僅かであり、その油室に供給する
圧油の圧力は低圧で良く、油圧ポンプ30の消費エネルギ
ーは僅かであるからアクティブサスペンションが消費す
るエンジン馬力は極く僅かである。At this time, the weight of the vehicle body is supported by the atmospheric pressure acting on the first piston 15, and the supporting force is constant even if the first piston 15 expands and contracts. The required force is small, the pressure of the pressure oil supplied to the oil chamber may be low, and the energy consumption of the hydraulic pump 30 is small. Therefore, the engine horsepower consumed by the active suspension is very small.
また、下部真空室16内を真空にするには真空ポンプを
用いずに、プラグ22を外して油圧シリンダＤの第２ピス
トン18を伸長して真空シリンダＣの第１ピストン15をス
トロークエンドまで伸長して下部真空室16内の空気を大
気に放出してプラグ22を装着することでも可能である。To evacuate the lower vacuum chamber 16, the plug 22 is removed, the second piston 18 of the hydraulic cylinder D is extended, and the first piston 15 of the vacuum cylinder C is extended to the stroke end without using a vacuum pump. Alternatively, the air in the lower vacuum chamber 16 may be released to the atmosphere and the plug 22 may be attached.
なお、第１シリンダ本体11と第２シリンダ本体12を一
体としたが別体としても良い。Although the first cylinder body 11 and the second cylinder body 12 are integrated, they may be separate bodies.
車体重量は真空圧シリンダＣの第１ピストン15に作用
する大気圧で支持されるから、油圧シリンダＤの縮小側
油室19、伸長側油室20内には車体重量に見合う高圧力が
発生しないので、この油圧シリンダＤの縮小側油室19、
伸長側油室20に低圧の圧力を供給することで真空圧シリ
ンダ１の第１ピストン15を伸縮作動できる。Since the body weight is supported by the atmospheric pressure acting on the first piston 15 of the vacuum cylinder C, no high pressure corresponding to the body weight is generated in the reduction side oil chamber 19 and the extension side oil chamber 20 of the hydraulic cylinder D. Therefore, the reduced-side oil chamber 19 of the hydraulic cylinder D,
By supplying a low pressure to the extension-side oil chamber 20, the first piston 15 of the vacuum cylinder 1 can be extended and contracted.
また、車体が揺動すると圧油供給機構Ｅによって油圧
シリンダＤの伸長側油室、縮小側油室に圧油を供給して
真空圧シリンダＣの第１ピストン15を伸縮することで車
輪を上下させて車体の姿勢が変化しないようにできる。When the vehicle body swings, the hydraulic oil is supplied to the expansion-side oil chamber and the reduction-side oil chamber of the hydraulic cylinder D by the hydraulic oil supply mechanism E, and the first piston 15 of the vacuum cylinder C is expanded and contracted to raise and lower the wheels. Thus, the posture of the vehicle body can be prevented from changing.
したがって、車体の揺動に追従して車輪を上下動して
車体の揺動・動揺の発生を抑えることができるアクティ
ブサスペンションとなるし、油圧シリンダＤの縮小側油
室19、伸長側油室20に供給する圧油の圧力が車体重量に
見合う圧力よりも低圧となってアクティブサスペンショ
ンが消費するエンジン馬力が極く僅かとなる。Accordingly, an active suspension can be provided that can move the wheels up and down following the swinging of the vehicle body to suppress the occurrence of the swinging and shaking of the vehicle body, and the reduction-side oil chamber 19 and the extension-side oil chamber 20 of the hydraulic cylinder D. The pressure of the pressure oil supplied to the vehicle becomes lower than the pressure corresponding to the weight of the vehicle body, so that the engine horsepower consumed by the active suspension becomes extremely small.
しかも、真空圧シリンダＣを用いて大気圧によって車
体重量を支持しているから、特別な圧力媒体に用いる必
要がなく安価となるばかりか、圧力媒体の漏れによる路
面の汚れなどが発生することがない。In addition, since the weight of the vehicle body is supported by the atmospheric pressure using the vacuum pressure cylinder C, it is not necessary to use the pressure medium as a special pressure medium, and it is not only inexpensive, but also the contamination of the road surface due to the leakage of the pressure medium may occur. Absent.
第１図は本発明の実施例を示す断面図、第２図、第３図
は従来例の説明図である。 11は第１シリンダ本体、15は第１ピストン、16は下部真
空室、17は上部大気圧室、Ｃは真空圧シリンダ、Ｄは油
圧シリンダ、Ｅは圧油供給機構。FIG. 1 is a sectional view showing an embodiment of the present invention, and FIGS. 2 and 3 are explanatory views of a conventional example. 11 is a first cylinder body, 15 is a first piston, 16 is a lower vacuum chamber, 17 is an upper atmospheric pressure chamber, C is a vacuum cylinder, D is a hydraulic cylinder, and E is a hydraulic oil supply mechanism.
フロントページの続き (56)参考文献 特開 平４−103418（ＪＰ，Ａ) 特開 平４−215516（ＪＰ，Ａ) 特開 昭55−47909（ＪＰ，Ａ) 特開 昭61−261118（ＪＰ，Ａ) 実開 平１−176508（ＪＰ，Ｕ) 実開 昭61−198744（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) B60G 17/015 ＦタームContinuation of front page (56) References JP-A-4-103418 (JP, A) JP-A-4-215516 (JP, A) JP-A-55-47909 (JP, A) JP-A-61-261118 (JP) , A) Japanese Utility Model Hei 1-176508 (JP, U) Japanese Utility Model Utility Model Sho 61-198744 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB name) B60G 17/015 F-term
Claims (1)
25を備えた第１ピストン15を嵌挿して下部真空室16と上
部大気圧室17を有する真空圧シリンダＣとし、この第１
シリンダ本体11を車体に連結し、ピストンロッド25で車
輪を支持し、 前記下部真空室16内を真空とすると共に、上部大気圧室
17を大気に開口して車体重量を上部大気圧室17の大気圧
で支持するようにし、 前記真空圧シリンダＣの第１ピストン15を伸縮する油圧
シリンダＤ、車体の揺動を検出するセンサ33、このセン
サ33で検出した車体の動揺により油圧シリンダＤの縮小
側油室19、伸長側油室20に圧油を供給する圧油供給機構
Ｅを設けたことを特徴とする車両のアクティブサスペン
ション。A piston rod is provided in a first cylinder body.
A first piston 15 provided with a first 25 is inserted into a vacuum cylinder C having a lower vacuum chamber 16 and an upper atmospheric pressure chamber 17.
The cylinder body 11 is connected to the vehicle body, the wheels are supported by a piston rod 25, the lower vacuum chamber 16 is evacuated, and the upper atmospheric pressure chamber is
A hydraulic cylinder D which expands and contracts the first piston 15 of the vacuum pressure cylinder C, and a sensor 33 which detects the swing of the vehicle body, by opening the body 17 to the atmosphere to support the weight of the vehicle body by the atmospheric pressure of the upper atmospheric pressure chamber 17. An active suspension for a vehicle, comprising a pressure oil supply mechanism E for supplying pressure oil to the reduction-side oil chamber 19 and the extension-side oil chamber 20 of the hydraulic cylinder D in response to the movement of the vehicle body detected by the sensor 33.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2221372A JP2757071B2 (en) | 1990-08-24 | 1990-08-24 | Active suspension of the vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2221372A JP2757071B2 (en) | 1990-08-24 | 1990-08-24 | Active suspension of the vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04103421A JPH04103421A (en) | 1992-04-06 |
| JP2757071B2 true JP2757071B2 (en) | 1998-05-25 |
Family
ID=16765763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2221372A Expired - Lifetime JP2757071B2 (en) | 1990-08-24 | 1990-08-24 | Active suspension of the vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2757071B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07119321A (en) * | 1993-10-21 | 1995-05-09 | Kajima Corp | Large-sized movable stands capable of coping with uneven spots |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8503290D0 (en) * | 1985-02-08 | 1985-03-13 | Lotus Car | Vehicle suspension arrangements |
| JPS61198744U (en) * | 1985-05-31 | 1986-12-12 | ||
| JPH0737930Y2 (en) * | 1988-06-02 | 1995-08-30 | カヤバ工業株式会社 | Active suspension |
-
1990
- 1990-08-24 JP JP2221372A patent/JP2757071B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04103421A (en) | 1992-04-06 |
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