JPH065944Y2 - Vehicle steering device - Google Patents
Vehicle steering deviceInfo
- Publication number
- JPH065944Y2 JPH065944Y2 JP9138188U JP9138188U JPH065944Y2 JP H065944 Y2 JPH065944 Y2 JP H065944Y2 JP 9138188 U JP9138188 U JP 9138188U JP 9138188 U JP9138188 U JP 9138188U JP H065944 Y2 JPH065944 Y2 JP H065944Y2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- steering
- holding
- pair
- 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
- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
Description
【考案の詳細な説明】 (産業上の利用分野) 本考案は、車両操向装置に係り、詳しくは、空気ばねを
利用してピストンを中立位置に保持する車両操向装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle steering system, and more particularly to a vehicle steering system that uses an air spring to hold a piston in a neutral position.
(従来の技術) 近時、社会の成熟化に伴って車両の走行性能にも高度な
要求が課せられており、前輪の転舵に応じて後輪を操舵
し、特に高速走行のコーナリング時における走行安定性
を向上させる車両操向装置が車両に搭載されるようにな
っている。(Prior art) Recently, as the society matures, high demands are being placed on the driving performance of vehicles. Steering the rear wheels according to the turning of the front wheels, especially when cornering at high speeds A vehicle steering device for improving running stability is mounted on a vehicle.
従来のこの種の車両操向装置としては、例えば特開昭6
1−81869号公報に記載のものが知られており、第
2図のように示される。同図において、1は車両操向装
置であり、車両操向装置1はパワーシリンダ2と、パワ
ーシリンダ2内を一対の液室3,4に区画するピストン
5と、ピストン5に連結されたピストンロッド6と、ピ
ストンロッド6を軸支するエンドカバー7,8と、液室
3,4内に配設されたスプリング9,10と、を含んで構
成されている。前輪操舵系からのパワーアシスト圧が低
いとき、スプリング9,10は付勢力によって双方向から
ピストン5を押圧して中立位置に保持する。一方、コネ
クタ11〜14を介して前輪操舵系から所定の液圧が加わる
と、ピストン5はスプリング9,10の付勢力に打ち勝っ
て中立位置から図中左右方向にピストンロッド6ととも
に移動し、ピストンロッド6にサイドロッド15,16を介
して連結された後輪に操舵量に応じた操舵角を与える。
なお、高速走行時に前輪操舵系からの液圧が低下する
と、ピストン5はスプリング9,10の付勢力によって中
立位置に保持され、これにより、後輪の操舵角は零とな
って車両の直進安定性が確保されている。As a conventional vehicle steering system of this type, for example, Japanese Patent Laid-Open No.
The one described in Japanese Patent Publication No. 1-81869 is known, and is shown as in FIG. In FIG. 1, reference numeral 1 denotes a vehicle steering device, and the vehicle steering device 1 includes a power cylinder 2, a piston 5 that divides the power cylinder 2 into a pair of liquid chambers 3 and 4, and a piston connected to the piston 5. It includes a rod 6, end covers 7 and 8 that pivotally support the piston rod 6, and springs 9 and 10 arranged in the liquid chambers 3 and 4, respectively. When the power assist pressure from the front wheel steering system is low, the springs 9 and 10 press the piston 5 in both directions by the urging force and hold it in the neutral position. On the other hand, when a predetermined hydraulic pressure is applied from the front wheel steering system via the connectors 11 to 14, the piston 5 overcomes the urging force of the springs 9 and 10 and moves from the neutral position to the left and right in the figure together with the piston rod 6, and the piston 5 The rear wheel connected to the rod 6 through the side rods 15 and 16 gives a steering angle according to the steering amount.
When the hydraulic pressure from the front wheel steering system decreases at high speeds, the piston 5 is held in the neutral position by the urging force of the springs 9 and 10, so that the steering angle of the rear wheels becomes zero and the vehicle keeps going straight. Sex is secured.
(考案が解決しようとする課題) しかしながら、このような従来の車両操作装置にあって
は、一対の液室内にそれぞれ配設した金属スプリングで
保持手段を構成し、前輪操舵系からの液圧が低いとき
に、保持手段の付勢力によってピストンを中立位置に保
持していため、保持手段(スプリング)には高速走行時
に車輪から印加される軸方向力よりも大きな付勢力が要
求されることから、大きなばね定数を得るため金属スプ
リングを形成する線材の内部応力が高まって線材の疲労
限界が低下し、かつ、スプリング同士が互いに押圧し合
うので保持手段(スプリング)の耐久性が低下するとい
う問題点があった。(Problems to be Solved by the Invention) However, in such a conventional vehicle operation device, the holding means is constituted by the metal springs respectively arranged in the pair of liquid chambers, and the hydraulic pressure from the front wheel steering system is Since the piston is held in the neutral position by the urging force of the holding means when it is low, the holding means (spring) is required to have a larger urging force than the axial force applied from the wheels during high-speed running. In order to obtain a large spring constant, the internal stress of the wire material forming the metal spring increases, the fatigue limit of the wire material decreases, and the springs press against each other, so that the durability of the holding means (spring) decreases. was there.
また、大きなばね定数を得るためにスプリングの線材の
直径を例えば、ピストンロッドの直径に匹敵するような
大きさに設定せざるを得ないため、ピストンの中立位置
からの変位量に相当する縮み量がスプリングに要求され
ることから、スプリングの自由長が必然的に長くなり、
各液室の軸方向長がピストンの変位量と比して約3倍程
度と長くなり、パワーシリンダの全長が長くなってトレ
ッドが所定値以上の車種でなければパワーシリンダを車
両に搭載できない。Also, in order to obtain a large spring constant, the diameter of the wire of the spring must be set to a size comparable to the diameter of the piston rod, for example, so the amount of contraction corresponding to the displacement from the neutral position of the piston Is required for the spring, the free length of the spring is inevitably long,
The axial length of each liquid chamber becomes about three times as long as the displacement amount of the piston, the total length of the power cylinder becomes long, and the power cylinder cannot be mounted on the vehicle unless the tread has a predetermined value or more.
(考案の目的) そこで本考案は、シリンダ内のピストンを中立位置に保
持する保持手段を金属スプリングの代わりに空気ばねで
形成することにより、金属における疲労限度を無くし
て、保持手段の耐久性を向上させるとともに、パワーシ
リンダを小型化することを目的としている。(Object of the Invention) Therefore, the present invention eliminates the fatigue limit in the metal and improves the durability of the holding means by forming the holding means for holding the piston in the cylinder at the neutral position with an air spring instead of the metal spring. It is intended to improve and downsize the power cylinder.
(課題を解決するための手段) 本考案による車両操向装置は上記目的達成のため、ステ
アリングホイールの操舵に応じて液圧装置から所定の液
圧が加わると、シリンダ内のピストンを略車幅方向に変
位させ、変位量に応じた転舵角を車輪に与えて車両を操
向するパワーシリンダを具備し、該パワーシリンダに
は、前記液圧が低いときに、保持力によってシリンダ内
のピストンを中立位置に保持する保持手段が備えられた
車両操向装置において、前記保持手段は、所定高圧のガ
スが充填された少なくとも一対の空気室と、前記ピスト
ンの変位に応じて一対の空気室のうち一方を膨脹、他方
を圧縮するとともに、空気室内の圧力に応じて保持力を
発生させる容積変化手段と、を備えている。(Means for Solving the Problems) In order to achieve the above object, the vehicle steering system according to the present invention, when a predetermined hydraulic pressure is applied from the hydraulic system in response to the steering of the steering wheel, causes the piston in the cylinder to move in a substantially vehicle width range. A power cylinder for steering the vehicle by displacing the steering wheel according to the displacement amount to the wheels and steering the vehicle. The power cylinder has a piston in the cylinder due to the holding force when the hydraulic pressure is low. In a vehicle steering system provided with a holding means for holding the neutral position, the holding means includes at least a pair of air chambers filled with a gas of a predetermined high pressure, and a pair of air chambers depending on the displacement of the piston. One of them is expanded, the other is compressed, and a volume changing means for generating a holding force according to the pressure in the air chamber is provided.
(作用) 本考案では、シリンダ内のピストンを中立位置に保持す
る保持手段が一対の空気室およひ保持力発生手段によっ
て構成されて空気ばねが形成され、保持手段が空気ばね
作用によって付勢力を発生させ、保持手段の付勢力によ
ってシリンダ内のピストンが中立位置に維持される。(Operation) In the present invention, the holding means for holding the piston in the cylinder at the neutral position is constituted by the pair of air chambers and the holding force generating means to form the air spring, and the holding means is urged by the air spring action. And the piston in the cylinder is maintained at the neutral position by the urging force of the holding means.
したがって、シリンダ内の液室および空気室の軸方向長
がピストンの変位量に応じて決定され、パワーシリンダ
の軸方向長が小型化されるとともに、金属スプリングで
保持手段を構成したとき問題となる金属の疲労限界が無
くなって保持手段の耐久性が向上する。Therefore, the axial lengths of the liquid chamber and the air chamber in the cylinder are determined according to the amount of displacement of the piston, the axial length of the power cylinder is reduced, and there is a problem when the holding means is constituted by a metal spring. The fatigue limit of the metal is eliminated and the durability of the holding means is improved.
(実施例) 以下、本考案を図面に基づいて説明する。(Example) Hereinafter, the present invention will be described with reference to the drawings.
第1図は本考案に係る車両操向装置の一実施例を示す図
である。FIG. 1 is a diagram showing an embodiment of a vehicle steering system according to the present invention.
まず、構成を説明する。同図において、21は車両操向装
置である。車両操向装置21はパワーシリンダ22と、パワ
ーシリンダ22内を自在に摺動するピストン23と、ピスト
ン23によってパワーシリンダ22内に区画された一対の液
室24,25と、液室24,25の開口端をそれぞれ封止するハウ
ジング26,27と、パワーシリンダ22の開口端を封止する
ハウジング28と、ピストン23に固定され、一体となって
変位するピストンロッド29と、ピストンロッド29を軸止
する軸受31〜33と、を含んで構成されている。パワーシ
リンダ22の外部にはコネクタ34〜37が取り付けられ、コ
ネクタ34〜37は図示しない液圧装置および前輪操舵装置
に配管を介して接続されており、液室24,25に作動液を
流入、流出させる。ステアリングホイールの操舵に応じ
て液圧装置から所定の液圧が加わると、ピストン23は作
動液の供給量に応じて中立位置から図中左右方向へ変位
する。ピストンロッド29はピストン23とともに変位し、
サイドロッド38,39を介して連結された図示しない後輪
にピストン23の変位量に応じた転舵角を与える。また、
パワーシリンダ22には液圧装置からの液圧が低いとき
に、保持力によってパワーシリンダ22内のピストン23を
中立位置に保持する保持手段41が設けられている。保持
手段41は車幅方向に設けられた一対の空気室42,43と、
ピストンロッド29に固定され、ピストン23とともに移動
する容積変化手段44と、一対の空気室42,43内に所定高
圧のガスを充填するガス注入口45,46と、を備えてい
る。容積変化手段44はその有効受圧面積および一対の空
気室42,43内のガス圧に応じた保持力を発生させ、保持
力によってピストンロッド29を双方向から付勢してピス
トン23を中立位置に保持する。また、容積変化手段44は
ピストン23の変位に応じて一対の空気室42,43のうち一
方を膨脹、他方を圧縮し、一対の空気室42,43のうち圧
縮側の内部圧力に応じて付勢力を発生させ、付勢力によ
ってピストンロッド29を付勢してピストン23を中立位置
に復帰させる。なお、サイドロッド38,39にはダストカ
バー47,48が被されており、ダストカバー47,48は外部か
らの泥水等の侵入を阻止する。また、50〜53はパッキ
ン、54〜58はシールリングであり、パッキン50〜53およ
びシールリング54〜58は液室24,25内の液密および一対
の空気室42,43内の気密を維持している。なお、シーリ
ング57はOリングとテフロンリングとの組み合わせリン
グである。First, the configuration will be described. In the figure, 21 is a vehicle steering device. The vehicle steering system 21 includes a power cylinder 22, a piston 23 that freely slides in the power cylinder 22, a pair of liquid chambers 24 and 25 partitioned by the piston 23 in the power cylinder 22, and liquid chambers 24 and 25. Housings 26 and 27 for respectively sealing the open ends of the power cylinder 22, a housing 28 for sealing the open ends of the power cylinder 22, a piston rod 29 fixed to the piston 23 and displaced integrally, and a piston rod 29 The bearings 31 to 33 that stop are included. Connectors 34 to 37 are attached to the outside of the power cylinder 22, and the connectors 34 to 37 are connected to a hydraulic device (not shown) and a front wheel steering device via a pipe, and the working fluid flows into the liquid chambers 24, 25. Drain. When a predetermined hydraulic pressure is applied from the hydraulic device according to the steering of the steering wheel, the piston 23 is displaced from the neutral position in the left-right direction in the drawing according to the supply amount of the hydraulic fluid. The piston rod 29 is displaced together with the piston 23,
A steering angle corresponding to the displacement amount of the piston 23 is given to a rear wheel (not shown) connected via the side rods 38, 39. Also,
The power cylinder 22 is provided with holding means 41 for holding the piston 23 in the power cylinder 22 at the neutral position by the holding force when the hydraulic pressure from the hydraulic device is low. The holding means 41 is a pair of air chambers 42, 43 provided in the vehicle width direction,
A volume changing means 44 fixed to the piston rod 29 and moving together with the piston 23, and gas inlets 45, 46 for filling a pair of air chambers 42, 43 with gas of a predetermined high pressure are provided. The volume changing means 44 generates a holding force corresponding to the effective pressure receiving area and the gas pressure in the pair of air chambers 42, 43, and the holding force biases the piston rod 29 in both directions to move the piston 23 to the neutral position. Hold. Further, the volume changing means 44 expands one of the pair of air chambers 42 and 43 and compresses the other in accordance with the displacement of the piston 23, and attaches it according to the internal pressure on the compression side of the pair of air chambers 42 and 43. A force is generated and the piston rod 29 is biased by the biasing force to return the piston 23 to the neutral position. The side rods 38 and 39 are covered with dust covers 47 and 48, and the dust covers 47 and 48 prevent intrusion of muddy water or the like from the outside. Further, 50 to 53 are packings, 54 to 58 are seal rings, and the packings 50 to 53 and the seal rings 54 to 58 maintain liquid tightness in the liquid chambers 24 and 25 and air tightness in the pair of air chambers 42 and 43. is doing. The sealing 57 is a combination ring of an O ring and a Teflon ring.
次に、作用を説明する。Next, the operation will be described.
ステアリングホイールが運転者によって操舵されると、
ステアリングホイールの操舵に応じて所定の液圧が図示
しない液圧装置から前輪操舵装置に加わり、これも図示
しない前輪が操舵される。同時に、液圧装置からの液圧
が配管(図示略)およびコネクタ34〜37を介して車両操
向装置1に加わり、液圧装置からの液圧によって液室2
4,25の間に圧力差が生じ、この圧力差に応じてピストン
23で発生する軸方向力が保持手段41の付勢力を超え、ピ
ストン23が作動液の供給量に応じた変位量だけ図中左右
方向へ動かされ、変位量に応じた転舵角が後輪に与えら
れる。When the steering wheel is steered by the driver,
A predetermined hydraulic pressure is applied to the front wheel steering device from a hydraulic device (not shown) in response to the steering of the steering wheel, and the front wheels (not shown) are also steered. At the same time, the hydraulic pressure from the hydraulic device is applied to the vehicle steering system 1 via the piping (not shown) and the connectors 34 to 37, and the hydraulic chamber 2 is driven by the hydraulic pressure from the hydraulic device.
There is a pressure difference between 4,25 and the piston
The axial force generated by 23 exceeds the urging force of the holding means 41, the piston 23 is moved in the lateral direction in the figure by the displacement amount according to the supply amount of hydraulic fluid, and the steering angle according to the displacement amount is changed to the rear wheel. Given to.
一方、前輪操舵装置からのパワーアシスト圧が低いとき
には、ピストン23で発生する軸方向力が保持手段41が発
生させる保持力よりも小さく、保持力によってピストン
23が双方向から付勢されて中立位置に維持される。な
お、保持手段41は保持力を以下のように発生させる。す
なわち、容積変化手段44が空気室42,43内部の高圧ガス
によって双方向から押圧され、容積変化手段44が受圧面
積とガス圧力との積に相当する保持力を発生させ、保持
力によって容積変化手段44がピストンロッド29を双方向
から押圧して中立位置に保持する。On the other hand, when the power assist pressure from the front wheel steering device is low, the axial force generated by the piston 23 is smaller than the holding force generated by the holding means 41, and the piston force is generated by the holding force.
23 is biased in both directions to maintain the neutral position. The holding means 41 generates a holding force as follows. That is, the volume changing means 44 is bidirectionally pressed by the high pressure gas inside the air chambers 42 and 43, the volume changing means 44 generates a holding force corresponding to the product of the pressure receiving area and the gas pressure, and the holding force changes the volume. Means 44 press the piston rod 29 in both directions to hold it in the neutral position.
また、車輪から外力が印加されてピストン23が左右方向
へ動かされると、一対の空気室42,43のうち一方が膨
脹、他方が圧縮されて圧縮側のガス圧力が上昇し、上昇
したガス圧力およびピストン23の変位量に応じて金属ス
プリングと同様の付勢力が発生し、付勢力によって容積
変化手段44が移動方向と反対方向に付勢され、ピストン
23が元の中立位置に戻される(以下、空気ばね作用とい
う)。ここで、保持手段41の発生させる保持力は容積変
化手段44の有効受圧面積および一対の空気室42,43内の
ガス圧力で決定され、空気ばね作用は一対の空気室42,4
3の容積およびガス圧力によって決定される。したがっ
て、本実施例ではガス圧力を適切に設定することによ
り、一対の空気室42,43の軸方向長をピストン23の変位
量と同一に設定することができる。同様に液室24,25が
発生させる力と液室24,25の軸方向長は無関係なので、
液室24,25の軸方向長をピストン23の変位量に合わせて
設定することができ、パワーシリンダ22の軸方向長を短
くすることができる。Further, when external force is applied from the wheels and the piston 23 is moved in the left-right direction, one of the pair of air chambers 42, 43 expands, the other compresses, and the gas pressure on the compression side rises. Also, an urging force similar to that of a metal spring is generated according to the amount of displacement of the piston 23, and the urging force urges the volume changing means 44 in the direction opposite to the moving direction.
23 is returned to its original neutral position (hereinafter referred to as the air spring action). Here, the holding force generated by the holding means 41 is determined by the effective pressure receiving area of the volume changing means 44 and the gas pressure in the pair of air chambers 42, 43, and the air spring action is the pair of air chambers 42, 4
Determined by 3 volumes and gas pressure. Therefore, in this embodiment, by properly setting the gas pressure, the axial length of the pair of air chambers 42, 43 can be set to be the same as the displacement amount of the piston 23. Similarly, since the force generated by the liquid chambers 24, 25 and the axial length of the liquid chambers 24, 25 are irrelevant,
The axial length of the liquid chambers 24, 25 can be set according to the displacement amount of the piston 23, and the axial length of the power cylinder 22 can be shortened.
このように、本実施例ではスプリングを一対の液室内に
配設した従来例と異なり、保持手段41を液室24,25の外
部に設け、液室24,25の軸方向長をピストン23の変位量
に応じて設定しているので、パワーシリンダ22の軸方向
長を短くすることができ、従来装着不可能だったトレッ
ドの狭い車種にも車両操向装置21を適用できる。また、
本実施例では金属スプリングで保持手段を構成する従来
例と異なり、ガスによる空気ばね作用を利用しているの
で、金属疲労による疲労限界を無くすることができ、保
持手段41の耐久性を向上できる。As described above, in this embodiment, unlike the conventional example in which the spring is arranged in the pair of liquid chambers, the holding means 41 is provided outside the liquid chambers 24 and 25, and the axial length of the liquid chambers 24 and 25 is set to the piston 23. Since the power cylinder 22 is set according to the displacement amount, the axial length of the power cylinder 22 can be shortened, and the vehicle steering device 21 can be applied to a vehicle model with a narrow tread that cannot be conventionally mounted. Also,
In the present embodiment, unlike the conventional example in which the holding means is composed of a metal spring, the air spring action of gas is used, so the fatigue limit due to metal fatigue can be eliminated, and the durability of the holding means 41 can be improved. .
さらに、本実施例は保持力を一対の空気室42,43内部に
ガス圧力によって設定可能なように構成しているので、
一種類の車両操向装置21で保持力の異なるものを自在に
製作することができ、車両操向装置21の適用範囲を広げ
ることができる。Further, in this embodiment, since the holding force can be set in the pair of air chambers 42, 43 by the gas pressure,
One type of vehicle steering device 21 having different holding forces can be freely manufactured, and the application range of the vehicle steering device 21 can be expanded.
なお、本実施例では一対の空気室42,43をパワーシリン
ダ22内部に設けているが、これに限らず一対の空気室を
パワーシリンダ22の外部に配設して内部の空気室42,43
と連通させても良く、この場合、車両操向装置21の適用
範囲をさらに拡大できる。In the present embodiment, the pair of air chambers 42, 43 is provided inside the power cylinder 22, but not limited to this, the pair of air chambers is provided outside the power cylinder 22, and the inner air chambers 42, 43 are provided.
The vehicle steering device 21 can be further expanded in this case.
また、同様にアキュムレータをパワーシリンダの外部に
設け、一対の空気室42,43内にガスの代わりに液体を満
たしてアキュムレーターと連通し、アキュムレーターの
空気ばね作用を利用して保持手段を構成しても良いのは
勿論である。Further, similarly, an accumulator is provided outside the power cylinder, the pair of air chambers 42, 43 is filled with a liquid instead of gas and communicates with the accumulator, and the holding means is configured by utilizing the air spring action of the accumulator. Of course, you can do that.
(効果) 本考案によれば、空気ばね作用によって保持力を発生さ
せ、保持力によってシリンダ内のピストンを中立位置に
保持するように保持手段を構成しているので、シリンダ
内の液室および空気室の軸方向長をピストンの変位量に
応じて決定することができ、パワーシリンダを小型化す
ることができるとともに、金属ばねで問題となる金属の
疲労限界を無くして保持手段の耐久性を向上できる。(Effect) According to the present invention, since the holding force is generated by the air spring action and the holding force holds the piston in the cylinder at the neutral position, the liquid chamber and air in the cylinder The axial length of the chamber can be determined according to the amount of displacement of the piston, the power cylinder can be downsized, and the fatigue limit of metal, which is a problem with metal springs, can be eliminated and the durability of the holding means can be improved. it can.
第1図は本考案に係る車両操向装置の一実施例を示す断
面図であり、第2図は従来の車両操向装置を示す断面図
である。 21……車両操向装置、 22……パワーシリンダ、 23……ピストン、 41……保持手段、 42,43……一対の空気室、 44……容積変化手段。FIG. 1 is a sectional view showing an embodiment of a vehicle steering apparatus according to the present invention, and FIG. 2 is a sectional view showing a conventional vehicle steering apparatus. 21 …… Vehicle steering device, 22 …… Power cylinder, 23 …… Piston, 41 …… Holding means, 42,43 …… A pair of air chambers, 44 …… Volume changing means.
Claims (1)
装置から所定の液圧が加わると、シリンダ内のピストン
を略車幅方向に変位させ、変位量に応じた転舵角を車輪
に与えて車両を操向するパワーシリンダを具備し、該パ
ワーシリンダには、前記液圧が低いときに、保持力によ
ってシリンダ内のピストンを中立位置に保持する保持手
段が備えられた車両操向装置において、 前記保持手段は、所定高圧のガスが充填された少なくと
も一対の空気室と、前記ピストンの変位に応じて一対の
空気室のうち一方を膨脹、他方を圧縮するとともに、空
気室内の圧力に応じて保持力を発生させる容積変化手段
と、を備えたことを特徴とする車両操向装置。1. When a predetermined hydraulic pressure is applied from a hydraulic device in response to steering of a steering wheel, a piston in a cylinder is displaced in a substantially vehicle width direction, and a steering angle corresponding to the displacement amount is applied to the wheel. A vehicle steering apparatus comprising a power cylinder for steering a vehicle, wherein the power cylinder is provided with a holding means for holding a piston in the cylinder at a neutral position by a holding force when the hydraulic pressure is low, The holding means expands at least one of the pair of air chambers filled with a gas of a predetermined high pressure and one of the pair of air chambers according to the displacement of the piston, compresses the other, and responds to the pressure inside the air chamber. A vehicle steering system comprising: a volume changing unit that generates a holding force.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9138188U JPH065944Y2 (en) | 1988-07-12 | 1988-07-12 | Vehicle steering device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9138188U JPH065944Y2 (en) | 1988-07-12 | 1988-07-12 | Vehicle steering device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0223279U JPH0223279U (en) | 1990-02-15 |
JPH065944Y2 true JPH065944Y2 (en) | 1994-02-16 |
Family
ID=31315864
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9138188U Expired - Lifetime JPH065944Y2 (en) | 1988-07-12 | 1988-07-12 | Vehicle steering device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH065944Y2 (en) |
Cited By (10)
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---|---|---|---|---|
US8902023B2 (en) | 2009-06-24 | 2014-12-02 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Acoustic resonator structure having an electrode with a cantilevered portion |
US8922302B2 (en) | 2011-08-24 | 2014-12-30 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Acoustic resonator formed on a pedestal |
US8962443B2 (en) | 2011-01-31 | 2015-02-24 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Semiconductor device having an airbridge and method of fabricating the same |
US8981876B2 (en) | 2004-11-15 | 2015-03-17 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Piezoelectric resonator structures and electrical filters having frame elements |
US9148117B2 (en) | 2011-02-28 | 2015-09-29 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Coupled resonator filter comprising a bridge and frame elements |
US9154112B2 (en) | 2011-02-28 | 2015-10-06 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Coupled resonator filter comprising a bridge |
US9203374B2 (en) | 2011-02-28 | 2015-12-01 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Film bulk acoustic resonator comprising a bridge |
US9243316B2 (en) | 2010-01-22 | 2016-01-26 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Method of fabricating piezoelectric material with selected c-axis orientation |
US9425764B2 (en) | 2012-10-25 | 2016-08-23 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Accoustic resonator having composite electrodes with integrated lateral features |
US9444426B2 (en) | 2012-10-25 | 2016-09-13 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Accoustic resonator having integrated lateral feature and temperature compensation feature |
-
1988
- 1988-07-12 JP JP9138188U patent/JPH065944Y2/en not_active Expired - Lifetime
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8981876B2 (en) | 2004-11-15 | 2015-03-17 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Piezoelectric resonator structures and electrical filters having frame elements |
US8902023B2 (en) | 2009-06-24 | 2014-12-02 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Acoustic resonator structure having an electrode with a cantilevered portion |
US9243316B2 (en) | 2010-01-22 | 2016-01-26 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Method of fabricating piezoelectric material with selected c-axis orientation |
US8962443B2 (en) | 2011-01-31 | 2015-02-24 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Semiconductor device having an airbridge and method of fabricating the same |
US9148117B2 (en) | 2011-02-28 | 2015-09-29 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Coupled resonator filter comprising a bridge and frame elements |
US9154112B2 (en) | 2011-02-28 | 2015-10-06 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Coupled resonator filter comprising a bridge |
US9203374B2 (en) | 2011-02-28 | 2015-12-01 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Film bulk acoustic resonator comprising a bridge |
US8922302B2 (en) | 2011-08-24 | 2014-12-30 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Acoustic resonator formed on a pedestal |
US9425764B2 (en) | 2012-10-25 | 2016-08-23 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Accoustic resonator having composite electrodes with integrated lateral features |
US9444426B2 (en) | 2012-10-25 | 2016-09-13 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Accoustic resonator having integrated lateral feature and temperature compensation feature |
Also Published As
Publication number | Publication date |
---|---|
JPH0223279U (en) | 1990-02-15 |
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