JPS60143113A - Oil leakage detecting device for car height adjusting system - Google Patents

Oil leakage detecting device for car height adjusting system

Info

Publication number
JPS60143113A
JPS60143113A JP24675083A JP24675083A JPS60143113A JP S60143113 A JPS60143113 A JP S60143113A JP 24675083 A JP24675083 A JP 24675083A JP 24675083 A JP24675083 A JP 24675083A JP S60143113 A JPS60143113 A JP S60143113A
Authority
JP
Japan
Prior art keywords
oil
vehicle height
hydraulic
valve
oil leakage
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
JP24675083A
Other languages
Japanese (ja)
Inventor
Hisami Kato
久美 加藤
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 JP24675083A priority Critical patent/JPS60143113A/en
Publication of JPS60143113A publication Critical patent/JPS60143113A/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
    • B60G17/02Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/04Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
    • B60G17/0408Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics details, e.g. antifreeze for suspension fluid, pumps, retarding means per se

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

PURPOSE:To accurately detect oil leakage by constituting a system in such a manner that, when abnormal lowering of both car height and working oil level in a tank is simultaneously detected, leakage in lower course of a hydraulic system that a leveling valve can also be detected. CONSTITUTION:When a pipe passage between, for example, a leveling valve 25 and an oil pressure source is damaged, causing oil leakage, contraflow of working oil staying upstream from the damaged point is prevented by a check valve not illustrated here. During this time, the oil is constantly drawn up, reducing the quantity of oil in the tank. When a shortage of oil is detected by a leveling sensor 40, the information about it is input into a controller 51. Then, a warning is issued, while power supply to the solenoid of the leveling valve 25 is disconnected in order to prevent oil leakage in the lower course. When oil leakage takes place between the leveling valve 25 and the car height adjusting equipment and also in the lower course than a oil leakage preventing valve, the oil level in the tank goes down, while the car height lowers. Then, the related outputs from the level sensor 40, car height sensors 42 and 43 are input into the controller 51 in order to issue an warning. With this contrivance, oil leakage at lower course than the oil leakage preventing valve can be detected and informed of.

Description

【発明の詳細な説明】 に関し、更に詳しくはレベリングバルブと車高調整器と
を継ぐ管路が亀裂または破損して油洩れを生じた場合に
、これを防止または警告する場合に用いることのできる
車高調整システムの油洩れ検出装置に関する。
[Detailed Description of the Invention] In more detail, it can be used to prevent or warn against oil leakage caused by cracks or damage in the pipeline connecting the leveling valve and the vehicle height adjuster. This invention relates to an oil leak detection device for a vehicle height adjustment system.

車両の車高調整装置は積載荷重の大きさや乗員数に応じ
て車体を適当な高さに調整できるものであり、この調整
により、車両への乗心地や操安性あるいは走行安定性を
得ることができるものである。したがって、車高調整装
置は車高レベルを調整するため、ポンプなどの油圧源、
レベリングバルブおよび配管などからなる油圧制御シス
テムを有し、車高レベルに応じてこれを適正レベルに調
整する様になっている。
A vehicle height adjustment device is a device that can adjust the vehicle body to an appropriate height depending on the size of the load and the number of passengers.This adjustment can improve ride comfort, handling, and driving stability of the vehicle. It is something that can be done. Therefore, in order to adjust the vehicle height level, the vehicle height adjustment device uses a hydraulic source such as a pump,
It has a hydraulic control system consisting of a leveling valve and piping, which adjusts it to an appropriate level depending on the vehicle height level.

しかしながら、何らかの理由でポンプと車高調整器との
間の管路、とりわけレベリングバルブと車高調整器との
間の管路に亀裂や破損が生じた場合には、ポンプから汲
み上げた作動油はどんどん亀裂部から系外の地上に排出
されるとともに、車高調整器内の作動油は同様に流出し
て車高が徐々に下がり、車両走行中にあっては危険とな
る。
However, if for some reason the pipe between the pump and the vehicle height adjuster, especially the pipe between the leveling valve and the vehicle height adjuster, is cracked or damaged, the hydraulic fluid pumped from the pump will In addition to being gradually discharged from the cracks to the ground outside the system, the hydraulic oil in the vehicle height adjuster also leaks out, gradually lowering the vehicle height, which becomes dangerous while the vehicle is in motion.

本発明はかかる従来の欠点を解決するものであり、車高
調整器の油圧制御系内、特にレベリングバルブと車高調
整器との間の管路に於ける油洩れを正しく検知すること
を目的とし、以づてこの検知データに基づいて警告を行
って車両の走行停止を催したり、油圧制御系内のバルブ
を閉じることを可能ならしめる様にした車高調整装置の
油洩れ検出装置を提供する。
The present invention solves such conventional drawbacks, and aims to correctly detect oil leaks in the hydraulic control system of a vehicle height adjuster, particularly in the pipe line between the leveling valve and the vehicle height adjuster. Therefore, we provide an oil leak detection device for a vehicle height adjustment device that issues a warning based on this detection data to make it possible to stop the vehicle or close a valve in the hydraulic control system. do.

そして、上記目的達成のため、本発明はレベリングバル
ブの切換制御に応じて、油圧源から作動油の供給を受け
たりタンクへ作動油を排出したりして伸縮する車高調整
器な備えた車高調整システムに於いて、車高の異常低下
を検出する車高センサと、上記タンク内の作動油量の異
常低下を検出するレベルセンサと、車高の異常低下およ
び作動油量の異常低下を同時に検出したとき、上記レベ
リングバルブ以降の油圧系の油洩れを判定する油洩れ検
出回路とを備えて構成したものである。
In order to achieve the above object, the present invention provides a vehicle equipped with a vehicle height adjuster that expands and contracts by receiving hydraulic fluid from a hydraulic source or discharging hydraulic fluid into a tank in response to switching control of a leveling valve. The height adjustment system includes a vehicle height sensor that detects an abnormal decrease in vehicle height, a level sensor that detects an abnormal decrease in the amount of hydraulic oil in the tank, and a level sensor that detects an abnormal decrease in the vehicle height and the amount of hydraulic oil. The oil leakage detection circuit is configured to include an oil leakage detection circuit that determines oil leakage in the hydraulic system after the leveling valve when simultaneously detected.

以下、図示した実施例に基づいて本発明を説明する。The present invention will be explained below based on the illustrated embodiments.

】・1図に示すように、本発明に係る油洩れ検出装置で
は、一方の油圧作動機構1に所望量の作動油を供給する
圧油供給回路2を有するとともに、他方の油圧作動機構
3に所望量の作動油を供給する油圧供給回路4を有して
いる。そして、本実施例においては、油圧作動機構3は
車両の車高調整装置として示されているものである。
]- As shown in Figure 1, the oil leak detection device according to the present invention has a pressure oil supply circuit 2 that supplies a desired amount of hydraulic oil to one hydraulic operating mechanism 1, and a pressure oil supply circuit 2 that supplies a desired amount of hydraulic oil to one hydraulic operating mechanism 3. It has a hydraulic pressure supply circuit 4 that supplies a desired amount of hydraulic oil. In this embodiment, the hydraulic operating mechanism 3 is shown as a vehicle height adjustment device.

上記一方の油圧作動機構1は、オープンセンタ形式のバ
ルブを有するものであって、本実施例においては、車両
のパワーステアリング機構とされており、当該圧油供給
回路2から所望量の作動油の供給があると作動し得るこ
ととなるとともに、当該作動後の作動油がタンクに戻さ
れるように回路5を介しても連通されている。
One of the hydraulic operating mechanisms 1 has an open center type valve, and in this embodiment is used as a power steering mechanism for a vehicle, and supplies a desired amount of hydraulic oil from the pressure oil supply circuit 2. When supplied, it is possible to operate, and it is also communicated via a circuit 5 so that the hydraulic oil after the operation is returned to the tank.

なお、上記圧油供給回路2中に作動油の流通があるとき
には、一方の油圧作動機構1には常に作動油の供給がな
されることとなるが、当該油圧作動機構1が作動されな
いときは、そのまま回路5を介してタンクに戻されるこ
ととなるのは勿論である。
Note that when hydraulic oil is flowing in the pressure oil supply circuit 2, hydraulic oil is always supplied to one of the hydraulic operating mechanisms 1, but when the hydraulic operating mechanism 1 is not operated, Of course, it is returned to the tank via the circuit 5.

上記他方の油圧作動機構3は、クローストセンタ形式の
バルブを有するものであって、本実施例においては、車
両の車高調整機構とされており、上記圧油供給回路4と
は回路6を介して連通されているものである。
The other hydraulic operating mechanism 3 has a close center type valve, and in this embodiment is used as a vehicle height adjustment mechanism, and is connected to the pressure oil supply circuit 4 via a circuit 6. It is communicated with each other.

この他方の油圧作動機構3は、車両のフロント側および
リヤ側の左右にそれぞれ配設される車高調整器20と、
当該車高調整器20に回路6を介して供給される作動油
を車両のリヤ側およびフロント側に分流させる回路22
に続したチェックバルブ23およびフローコントロール
バルブ24の並列回路と、当該チェックバルブ23と車
両のフロント側およびリヤ側の車両調整器20とを連通
する回路中にそれぞれ配設されたレベリングバルブ25
とを有してなるもの。
The other hydraulic operating mechanism 3 includes vehicle height adjusters 20 disposed on the left and right sides of the front and rear sides of the vehicle, respectively;
A circuit 22 that divides the hydraulic oil supplied to the vehicle height adjuster 20 via the circuit 6 to the rear side and front side of the vehicle.
A parallel circuit of a check valve 23 and a flow control valve 24 that are connected to each other, and a leveling valve 25 disposed in a circuit that communicates the check valve 23 with the vehicle regulator 20 on the front side and rear side of the vehicle.
Something that has the following.

である。It is.

そして、上記車高調整器20に作動油の供給があると、
当該車高調整器20を構成するシリンダ20(Z内に摺
動自在に挿通されているピストンロッド20bが上昇さ
れることとなって、車両の車高が高く調整されることと
なり、逆に、車高調整器20から作動油の排出があると
シリンダ20α内のピストンロッド20hが下降される
こととなって、車両の車高が低く調整されることとなる
Then, when hydraulic oil is supplied to the vehicle height adjuster 20,
The piston rod 20b that is slidably inserted into the cylinder 20 (Z) that constitutes the vehicle height adjuster 20 is raised, and the vehicle height of the vehicle is adjusted to be high. When the hydraulic oil is discharged from the vehicle height adjuster 20, the piston rod 20h in the cylinder 20α is lowered, and the height of the vehicle is adjusted to be lower.

また、チェックバルブ23を通過した作動油がレベリン
グバルブ25を介して車高調整器20に供給されるとき
および車高調整器2oから作動油を排出するときには当
該レベリングバルブ25はポジション25dに切り換え
られ、車高調整器20に作動油の供給も要せず、また、
当該車高調整器20からの作動油の排出も要しないとき
は、レベリングバルブ25はポジション25hに切り換
えられることとなるのは勿論である。そして、このレベ
リングバルブ25における各切り換え操作は、図示して
はいないが、車高調整器20等に適宜に装備された車高
センサかもの人力によってソレノイド25Cが励磁され
て行なわれ′るものである。
Furthermore, when the hydraulic fluid that has passed through the check valve 23 is supplied to the vehicle height regulator 20 via the leveling valve 25, and when the hydraulic fluid is discharged from the vehicle height regulator 2o, the leveling valve 25 is switched to the position 25d. , it is not necessary to supply hydraulic oil to the vehicle height adjuster 20, and
Of course, when there is no need to discharge the hydraulic fluid from the vehicle height adjuster 20, the leveling valve 25 is switched to the position 25h. Although not shown, each switching operation of the leveling valve 25 is performed by energizing the solenoid 25C by human power, such as a vehicle height sensor appropriately installed in the vehicle height adjuster 20, etc. be.

なお、26はレベリングバルブ25と車両のフロント側
およびリヤ側の各車高調整器20との間に接続した油洩
れ防止バルブで、矛2図(イ)に示す様に、シリンダ2
6.2内にスプリング26hによって弾持したスプール
26Cを収容し、スプール26Cによって区画した一方
の油室26dにリターン回路38に通じるリターン通路
を設け、他方の油室26gの周壁および端壁には車高調
整器20およびレベリングバルブ25にそれぞれ通じる
通路を設けである。これによれば車高調整器20とレベ
リングバルブ25との間で管路(回路)が破損するなど
して油洩れを生じたとき、油室26g内圧力が低下する
ことにより、スプール26Cが上記通路を閉止し、これ
により車高調整器20からの油の流出を阻止する。なお
、油室26d内の作動油はスプール26C外周から洩れ
たもので、リターン回路38よりタンクに戻されろ。
In addition, 26 is an oil leak prevention valve connected between the leveling valve 25 and each vehicle height adjuster 20 on the front side and rear side of the vehicle, and as shown in Figure 2 (a), the oil leak prevention valve 26
A spool 26C supported by a spring 26h is housed in 6.2, and one oil chamber 26d partitioned by the spool 26C is provided with a return passage leading to the return circuit 38, and the peripheral wall and end wall of the other oil chamber 26g are Passages are provided that communicate with the vehicle height adjuster 20 and the leveling valve 25, respectively. According to this, when an oil leak occurs due to damage to the pipe line (circuit) between the vehicle height adjuster 20 and the leveling valve 25, the pressure inside the oil chamber 26g decreases, and the spool 26C The passage is closed, thereby preventing oil from flowing out from the vehicle height adjuster 20. Note that the hydraulic oil in the oil chamber 26d leaks from the outer periphery of the spool 26C and is returned to the tank via the return circuit 38.

一方、との牙2図(イ)に示した油洩れ防止バルブ26
内のスプール26Cの代わりに、2・2図(ロ)に示す
ようなポペット弁26Cを使用しても牙2図(イ)と同
様な作用を奏するが、特に、ポペット弁260を利用し
たことで油洩れ防止の効果はより大きくなる。
On the other hand, the oil leakage prevention valve 26 shown in Figure 2 (A)
Even if a poppet valve 26C as shown in Fig. 2.2 (B) is used instead of the spool 26C inside, the same effect as in Fig. 2 (A) can be obtained, but in particular, using the poppet valve 260 The effect of preventing oil leaks will be even greater.

また、油洩れ防止バルブ26と車高調整器20との間に
は減衰力発生弁27を介して連通ずるアキュムレータ2
8がソレノイドバルブ29を有して配設されている。
Further, an accumulator 2 is connected between the oil leak prevention valve 26 and the vehicle height adjuster 20 via a damping force generating valve 27.
8 is provided with a solenoid valve 29.

上記圧油供給回路2はポンプからなる油圧源30を有し
て、タンク31かもの作動油を一方の油圧作動機構1に
吐出し、圧油供給回路4ばポンプからなる油圧源32を
有して、タンク31からの作動油を他方の油圧作動機構
3に吐出している。本実施例にあっては、油圧源30゜
32としてのポンプは車両のエンジンによって駆動され
るように設けられている。
The pressure oil supply circuit 2 has a hydraulic source 30 consisting of a pump, which discharges hydraulic oil from a tank 31 to one of the hydraulic operating mechanisms 1, and the pressure oil supply circuit 4 has a hydraulic source 32 consisting of a pump. The hydraulic oil from the tank 31 is discharged to the other hydraulic operating mechanism 3. In this embodiment, the pump as the hydraulic power source 30, 32 is provided to be driven by the engine of the vehicle.

33.34は各圧油供給回路2,4にそれぞれ接続した
フローコントロールバルブで、油圧作動機構1としての
パワーステアリング機構や車高調整器20の各作動にと
って必要とする油量を確保し、余剰流分は油圧[30,
32下流の圧油供給回路2に戻してリサイクルさせるが
、必要に応じタンク31に直接戻す様にすることもでき
る。
33 and 34 are flow control valves connected to the pressure oil supply circuits 2 and 4, respectively, to secure the amount of oil required for each operation of the power steering mechanism as the hydraulic operation mechanism 1 and the vehicle height adjuster 20, and to prevent excess oil. The flow is hydraulic [30,
32 downstream to the pressure oil supply circuit 2 for recycling, but it can also be returned directly to the tank 31 if necessary.

なお、上記フローコントロールバルブ33゜34とタン
ク31との間の回路にはリリーフバルブ35.36がそ
れぞれ配設され、上記油圧作動機構1.3に対する供給
油圧が設定圧以上となったとき作動し、その過剰圧をド
レンする様に作用し、例えば寒冷地に於けるように作動
油の粘性が高い場合や油圧作動機構1,3の故障により
作動油の管路内流通抵抗が高くなった場合に、その作動
油の供給を制限する。
In addition, relief valves 35 and 36 are provided in the circuit between the flow control valves 33 and 34 and the tank 31, respectively, and are activated when the hydraulic pressure supplied to the hydraulic operating mechanism 1.3 exceeds a set pressure. For example, when the viscosity of the hydraulic oil is high such as in a cold region, or when the flow resistance of the hydraulic oil in the pipe becomes high due to a failure of the hydraulic operating mechanisms 1 and 3. limit the supply of hydraulic fluid.

37はフローコントロールバルブ34とチェックバルブ
22とを継ぐ回路6の途中およびタンク310間に接続
したアンロードバルブで、油圧作動機構3に作動油を供
給するときには遮断状態となり、連通状態のとぎにはフ
ローコントロールバルブ34からの作動油はタンク31
に戻されることになる。なお、このアンロードバルブ3
7は車高調整器20に適宜に装備した車高センサ出力に
基づいて制御される。
37 is an unload valve connected in the middle of the circuit 6 connecting the flow control valve 34 and the check valve 22 and between the tank 310, and is in a cutoff state when supplying hydraulic oil to the hydraulic operating mechanism 3, and is in a disconnected state after being in a communication state. The hydraulic oil from the flow control valve 34 is transferred to the tank 31
will be returned to. In addition, this unload valve 3
7 is controlled based on the output of a vehicle height sensor appropriately installed in the vehicle height adjuster 20.

そしてかかる構成になる油圧作動機構1を有する車高調
整システムでは、油圧源3oからの油圧を受けて油圧作
動機構1としての例えばパワーステアリング(幾構に適
当な油圧を供給してステアリングに回動助勢を伺J:8
jする一方に於いて、油圧源32からの油圧を受けて油
圧作動機構3としての車高調整器20を、レベリングバ
ルブ25およびアンロードバルブ37に応動しながら車
高調整動作させろことになる3゜一方、タンク31には
レベルセンサ40が設けら、111、これがタンク31
内の作動油が所定レベル以下に減少したことを検出する
In the vehicle height adjustment system having the hydraulic operating mechanism 1 having such a configuration, the hydraulic operating mechanism 1 receives hydraulic pressure from the hydraulic source 3o, and supplies appropriate hydraulic pressure to various parts of the hydraulic operating mechanism 1, such as a power steering system, to turn the steering wheel. Ask for help J:8
At the same time, the vehicle height adjuster 20 as the hydraulic operating mechanism 3 receives hydraulic pressure from the hydraulic source 32 and operates to adjust the vehicle height while responding to the leveling valve 25 and the unloading valve 37.゜On the other hand, the tank 31 is provided with a level sensor 40, 111, which is the level sensor 40 installed in the tank 31.
Detects when the hydraulic fluid in the tank has decreased below a predetermined level.

また、車両前後に於いて各−ずつ設けられるスタビライ
ザ41の中央部には、それぞれ車高センサ42.43が
取り付けられている。なお、これらの各センサ42 、
43は各車輪ごとに設けることもでき、スタビライザ4
1以外の適所、例えばシリンダ20aに設ぽてピストン
ロッド20bの昇降量を直接検知する様な構成にすると
ともできろ。
Further, vehicle height sensors 42 and 43 are respectively attached to the center portions of the stabilizers 41 provided at the front and rear of the vehicle. Note that each of these sensors 42,
43 can be provided for each wheel, and the stabilizer 4
It is also possible to install the piston rod 20b at a suitable location other than 1, for example, in the cylinder 20a, so as to directly detect the amount of vertical movement of the piston rod 20b.

劉・3図は本発明の油洩れ検出器の回路ブロック図であ
る。同図に於いて、40は上記したタンク31内作動油
のレベルセンサ、42.43は同じく車高センサであり
、これら各センサ40.42.43の出力はそれぞれA
NDゲート44 、45に入力され、と、l′lらのA
NDゲート4、4 、45の出力はORゲート46に入
力される構成となっている。また、レベルセンサ40の
出力端子47は系内作動油の洩れ検知信号を出力する出
力端子であり、出力端子48はレベリングバルブ25以
降の作動油の洩れ検知信号を出力する出力端子である。
Figure 3 of Liu is a circuit block diagram of the oil leak detector of the present invention. In the figure, 40 is a level sensor for the hydraulic oil in the tank 31, and 42.43 is a vehicle height sensor, and the outputs of these sensors 40, 42, and 43 are respectively A.
input to ND gates 44 and 45, and A of l'l et al.
The outputs of the ND gates 4, 4, and 45 are input to an OR gate 46. Further, the output terminal 47 of the level sensor 40 is an output terminal that outputs a leak detection signal of the hydraulic oil in the system, and the output terminal 48 is an output terminal that outputs a leak detection signal of the hydraulic oil after the leveling valve 25.

なお、49.50は各出力端子に接続されたコントロー
ラ51に取り付けた系内各部の油洩れを表示する警報ラ
ンプで、例えば車両のダツシュボードなどに設置される
Note that 49.50 is a warning lamp attached to the controller 51 connected to each output terminal to indicate an oil leak in each part of the system, and is installed, for example, on the dash board of a vehicle.

次に、上記装置および回路について油洩れ検知動作を説
明する。
Next, the oil leak detection operation of the above device and circuit will be explained.

いま、油圧源32とレベリングバルブ25とを結ぶ圧油
供給回路4または回路6のうち、例えば回路6のX点に
配管−Lの損傷が生じ、油洩れを生じた場合には、レベ
リングバルブ25より上流側の作動油は、チェックバル
ブ23により逆流が一旦防止され、その後フローコント
ロールバルブ24を通じて徐々に洩出するが、この間油
圧源32はタンク31内の作動油ケ、汲み上げ続けてい
て、タンク31内の作動油量が大幅に減少している。こ
のため、作動油の設定レベルでレベルセンサ40が作動
油不足を検知し、出力端子47を通じコントローラ51
にセンサ出力を人カオる。コントローラ51はこのセン
サ出力に基づいて警報ランプ49を点滅せしめ、油洩れ
事故がレベリングバルブ25より上流の配管で発生した
ことを表示し、応急処置を講することを運転者に促すこ
ととなる。
Now, in the pressure oil supply circuit 4 or circuit 6 that connects the hydraulic power source 32 and the leveling valve 25, for example, if the pipe L is damaged at the X point of the circuit 6 and an oil leak occurs, the leveling valve 25 The hydraulic fluid on the more upstream side is temporarily prevented from flowing back by the check valve 23, and then gradually leaks out through the flow control valve 24. However, during this time, the hydraulic power source 32 continues to pump up the hydraulic fluid in the tank 31. The amount of hydraulic oil in 31 has decreased significantly. Therefore, the level sensor 40 detects a lack of hydraulic oil at the set level of the hydraulic oil, and the controller 51
The sensor output is distorted. The controller 51 flashes the alarm lamp 49 based on this sensor output, indicating that an oil leak accident has occurred in the piping upstream of the leveling valve 25, and prompting the driver to take emergency measures.

また、上記レベルセンサ40のセンサ出力に基づき、コ
ントローラ51によりレベリングバルブ25のソレノイ
ド25Cに対する通電を断つことにより、レベリングバ
ルブ25より下流側の作動油の洩れを防止することがで
きる。
Further, based on the sensor output of the level sensor 40, the controller 51 cuts off the power to the solenoid 25C of the leveling valve 25, thereby preventing leakage of hydraulic oil downstream of the leveling valve 25.

次に、レベリングバルブ25と車高調整器20とを継ぐ
回路のうち、油洩れ防止バルブ26下流のY点で、配管
上の損傷事故が生じ、ここから油洩れを生じた場合には
、油洩れ防止バルブ26にはレベリングバルブ25を通
じて作動油が流され続け、Y点から大量に洩れ出るので
、タンク31内の作動油量が徐々に減少して行く。一方
、車高調整器20のシリンダ20a内の作動油は車体重
量によるピストンロッド205の下降により、Y点から
洩れ出ることになる。
Next, in the circuit that connects the leveling valve 25 and the vehicle height adjuster 20, if a damage accident occurs on the piping at point Y downstream of the oil leak prevention valve 26 and oil leaks from there, the oil Hydraulic oil continues to flow into the leak prevention valve 26 through the leveling valve 25 and leaks in large quantities from point Y, so the amount of hydraulic oil in the tank 31 gradually decreases. On the other hand, the hydraulic oil in the cylinder 20a of the vehicle height adjuster 20 leaks from point Y due to the lowering of the piston rod 205 due to the weight of the vehicle.

かかる2つの油洩れ動作によって、タンク31のレベル
センサ40は作動油不足を検出し、そのセンサ出力をA
NDゲート44に人力するとともに、車高センサ42は
車高が設定レベル以下に低下したことを検出し、そのセ
ンサ出力をANDゲート44に人力することになる。こ
のためこのANDゲート44およびORケート46に警
報信号が得られ、出力端子48を通じてコントローラ5
1に人力された」二記警報信号に基づいて、コントロー
ラ51は警報ランプ50を点滅せしめ、油洩れ事故がレ
ベリングバルブ25より下流で、さらに油洩れ防止バル
ブ26の下流の管路で発生したことが表示されるのであ
る。
Due to these two oil leakage operations, the level sensor 40 of the tank 31 detects a shortage of hydraulic oil, and converts the sensor output into A.
At the same time as the ND gate 44 is manually operated, the vehicle height sensor 42 detects that the vehicle height has fallen below a set level, and the sensor output is manually input to the AND gate 44 . Therefore, an alarm signal is obtained at the AND gate 44 and the OR gate 46, and the alarm signal is sent to the controller 5 through the output terminal 48.
Based on the alarm signal 2, which was manually input by the controller 51, the controller 51 blinks the alarm lamp 50, indicating that an oil leak accident has occurred downstream of the leveling valve 25 and further downstream of the oil leak prevention valve 26. is displayed.

なお、油洩れ事故がレベリングバルブ25と油洩れ防止
バルブ26との間で生じた場合には、油洩れ防止バルブ
26がこれより下流の抽洩れを防止するとともに、油洩
れ防止バルブ26より上流の油洩れはタンク31のレベ
ルセンサ40により検出し、レベリングバルブ25を閉
じる様に、コントローラ51によってコントロールする
こともできる。
Note that if an oil leakage accident occurs between the leveling valve 25 and the oil leakage prevention valve 26, the oil leakage prevention valve 26 will prevent the oil leakage downstream from this, and the oil leakage prevention valve 26 will prevent the oil leakage from occurring between the oil leakage prevention valve 26 and the oil leakage prevention valve 26. Oil leakage can also be detected by the level sensor 40 of the tank 31 and controlled by the controller 51 to close the leveling valve 25.

以上述べてきた様に、本発明によれば、レベリングバル
ブと車高調整器とを結んだ管路中の油洩れ事故を、タン
ク31内作動油のレベルおよび車高レベルから簡単かつ
確実に検出することができ、この検出出力に基づいて警
報を発したり、所定の回復作業を促したりすることがで
きるものであり、また、レベリングバルブを閉じるなど
して作動油の流出を喰い止めることもできろ。
As described above, according to the present invention, an oil leak accident in the conduit connecting the leveling valve and the vehicle height adjuster can be easily and reliably detected from the level of the hydraulic oil in the tank 31 and the vehicle height level. Based on this detection output, it is possible to issue an alarm or prompt for specified recovery work, and it is also possible to prevent hydraulic oil from flowing out by closing the leveling valve. reactor.

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

珂・1図は本発明に係る車高調整システムを示す油圧制
御回路図、矛2図(イ)(ロ)は油洩れ防止バルブの断
面図、矛3図は本発明の油洩れ防止装置のブロック接続
図である。 20・・・車高調整器、25・Φ・レベリングバルブ、
30−1油圧源、31・1タンク、40・・・レベルセ
ンサ、42・・・車高センサ。 代理人弁理士 大野 泉
Figure 1 is a hydraulic control circuit diagram showing the vehicle height adjustment system according to the present invention, Figures 2 (A) and (B) are cross-sectional views of the oil leak prevention valve, and Figure 3 is a diagram of the oil leak prevention device of the present invention. It is a block connection diagram. 20...Vehicle height adjuster, 25.Φ.Leveling valve,
30-1 hydraulic power source, 31.1 tank, 40 level sensor, 42 vehicle height sensor. Representative Patent Attorney Izumi Ohno

Claims (1)

【特許請求の範囲】 (111/ヘリングバルブの切換制御に応じて、油圧源
から作動油の供給を受けたりタンクへ作動油を排出した
りして伸縮する車高調整器を備えた車高調整システムに
於いて、車高の異常低下を検出する車高センサと、上記
タンク内の作動油量の異常低下を検出するレベルセンサ
と、車高の異常低下および作動油量の異常低下を同時に
検出したとき、」二記しヘリングハルブ以降の油圧系の
油洩れを判定する油洩れ検出回油とを備えたことを特徴
とする車高調整システムの油洩れ検出装置。 (2)油洩れ検出回路はレベルセンサ出力および車高セ
ンサ出力を2人力とするANDケートである特許請求の
範囲牙1項記載の車高調整システムの油洩れ検出装置。
[Claims] (111/Vehicle height adjustment equipped with a vehicle height adjuster that expands and contracts by receiving hydraulic fluid from a hydraulic source or discharging hydraulic fluid into a tank in response to switching control of a Hering valve. In the system, a vehicle height sensor detects an abnormal decrease in vehicle height, a level sensor detects an abnormal decrease in the amount of hydraulic oil in the tank, and simultaneously detects an abnormal decrease in vehicle height and an abnormal decrease in the amount of hydraulic oil. An oil leak detection device for a vehicle height adjustment system, characterized in that the oil leak detection circuit is equipped with an oil leak detection circuit that determines an oil leak in the hydraulic system after the Heringhalb. (2) The oil leak detection circuit is a level An oil leak detection device for a vehicle height adjustment system according to claim 1, which is an AND gate in which the sensor output and the vehicle height sensor output are performed by two people.
JP24675083A 1983-12-29 1983-12-29 Oil leakage detecting device for car height adjusting system Pending JPS60143113A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24675083A JPS60143113A (en) 1983-12-29 1983-12-29 Oil leakage detecting device for car height adjusting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24675083A JPS60143113A (en) 1983-12-29 1983-12-29 Oil leakage detecting device for car height adjusting system

Publications (1)

Publication Number Publication Date
JPS60143113A true JPS60143113A (en) 1985-07-29

Family

ID=17153093

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24675083A Pending JPS60143113A (en) 1983-12-29 1983-12-29 Oil leakage detecting device for car height adjusting system

Country Status (1)

Country Link
JP (1) JPS60143113A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6296111A (en) * 1985-10-22 1987-05-02 Mazda Motor Corp Ground clearance adjuster for automobile
JPS6348606U (en) * 1986-09-19 1988-04-02
JPS6411406U (en) * 1987-07-10 1989-01-20
JPH0269509U (en) * 1988-11-17 1990-05-25
CN105564181A (en) * 2015-12-11 2016-05-11 北京特种机械研究所 Hydraulic suspension control system provided with variable modules
RU2726959C1 (en) * 2019-12-30 2020-07-17 Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) Hydraulic drive protection system
RU2726976C1 (en) * 2019-12-30 2020-07-17 Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) Hydraulic drive protection system
CN111442016A (en) * 2019-01-16 2020-07-24 宝山钢铁股份有限公司 Automatic early warning and judging method for oil leakage of hydraulic system of continuous casting machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5189980A (en) * 1975-02-05 1976-08-06
JPS58133999A (en) * 1982-02-01 1983-08-09 Mitsubishi Heavy Ind Ltd Single ram type hydraulic steering device
JPS59140907A (en) * 1983-01-24 1984-08-13 Hitachi Constr Mach Co Ltd Oil leakage preventive device of construction machinery

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5189980A (en) * 1975-02-05 1976-08-06
JPS58133999A (en) * 1982-02-01 1983-08-09 Mitsubishi Heavy Ind Ltd Single ram type hydraulic steering device
JPS59140907A (en) * 1983-01-24 1984-08-13 Hitachi Constr Mach Co Ltd Oil leakage preventive device of construction machinery

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6296111A (en) * 1985-10-22 1987-05-02 Mazda Motor Corp Ground clearance adjuster for automobile
JPS6348606U (en) * 1986-09-19 1988-04-02
JPS6411406U (en) * 1987-07-10 1989-01-20
JPH0269509U (en) * 1988-11-17 1990-05-25
CN105564181A (en) * 2015-12-11 2016-05-11 北京特种机械研究所 Hydraulic suspension control system provided with variable modules
CN111442016A (en) * 2019-01-16 2020-07-24 宝山钢铁股份有限公司 Automatic early warning and judging method for oil leakage of hydraulic system of continuous casting machine
CN111442016B (en) * 2019-01-16 2021-11-16 宝山钢铁股份有限公司 Automatic early warning and judging method for oil leakage of hydraulic system of continuous casting machine
RU2726959C1 (en) * 2019-12-30 2020-07-17 Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) Hydraulic drive protection system
RU2726976C1 (en) * 2019-12-30 2020-07-17 Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) Hydraulic drive protection system

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