JPH01169404U - - Google Patents

Description

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

第１図は本考案回路の一実施例を示す要部の油
圧回路図、第２図は従来周知のアクテイブサスペ
ンシヨン機構の一例を示す構成図、第３図は上記
アクテイブサスペンシヨン機構における制御回路
の一例を示す油圧回路図、第４図は上記制御回路
における制御弁構造部の一例を示す構成図、第５
図は上記制御弁構造部におけるパイロツト回路部
の一例を示す要部縦断側面図、第６図は前記制御
弁構造部の作動状態を示す回路図である。 符号の説明、１……車体、２……車輪、４……
懸架スプリング、５……単動シリンダ、７……コ
ントローラ、８，８Ｒ，８Ｌ……制御弁、１３…
…供給管路、１７……戻り管路、２０……シヤツ
トバルブ、２１……固定絞り、２２……可変絞り
、２３……スプール、２４……パイロツト室、３
１，３３……チエツク弁、３２……バイパス管路
、３４……絞り。 Fig. 1 is a hydraulic circuit diagram of essential parts showing an embodiment of the circuit of the present invention, Fig. 2 is a configuration diagram showing an example of a conventionally known active suspension mechanism, and Fig. 3 is a control circuit in the above active suspension mechanism. Fig. 4 is a hydraulic circuit diagram showing an example of the control valve structure in the control circuit;
The figure is a longitudinal sectional side view of a main part showing an example of the pilot circuit section in the control valve structure, and FIG. 6 is a circuit diagram showing the operating state of the control valve structure. Explanation of symbols, 1...Vehicle body, 2...Wheels, 4...
Suspension spring, 5... Single acting cylinder, 7... Controller, 8, 8R, 8L... Control valve, 13...
...Supply pipe line, 17...Return pipe line, 20...Shut valve, 21...Fixed throttle, 22...Variable throttle, 23...Spool, 24...Pilot chamber, 3
1, 33... Check valve, 32... Bypass pipe line, 34... Throttle.

補正 平１．８．２２ 実用新案登録請求の範囲を次のように補正する
。Amendment 1.8.22. The scope of claims for utility model registration is amended as follows.

【実用新案登録請求の範囲】 懸架スプリングと並置した単動シリンダの内圧
を制御することにより姿勢制御を図るアクテイブ
サスペンシヨンであつて、前記内圧制御のための
作動油の給排制御弁がパイロツト圧に応動し、か
つ、作動油の戻り管路の圧力の影響を受ける構成
からなる制御システムにおいて、前記制御弁のパ
イロツト回路部に作動油の供給管路側から戻り管
路側への流れのみを許すチエツク弁を設けると共
に、車輛における左右一対のこれ等制御弁と作動
油源側との接続を計る車高保持用シヤツトバルブ
の制御弁側供給管路と戻り管路との間に、戻り管
路側から供給管路側への流れのみを許すチエツク
弁と絞りとを直列に挿入したバイパス管路を設け
てなることを特徴とするアクテイブサスペンシヨ
ンの油圧回路。[Claims for Utility Model Registration] An active suspension that achieves posture control by controlling the internal pressure of a single-acting cylinder arranged in parallel with a suspension spring, wherein the hydraulic oil supply and discharge control valve for controlling the internal pressure is a pilot. In a control system configured to respond to pressure and be influenced by pressure in a return pipe of hydraulic oil, the pilot circuit portion of the control valve only allows flow of hydraulic oil from the supply pipe side to the return pipe side. In addition to providing a check valve, a check valve is provided between the control valve side supply pipe and the return pipe of the vehicle height maintenance shaft valve, which connects the pair of left and right control valves in the vehicle to the hydraulic oil source side, from the return pipe side. A hydraulic circuit for an active suspension, characterized in that a bypass pipe line is provided in which a check valve and a throttle are inserted in series to allow flow only to the supply pipe side.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 懸架スプリングと並置した単動シリンダの内圧
を制御することにより車高保持を計るアクテイブ
サスペンシヨンであつて、前記内圧制御のための
作動油の給排制御弁がパイロツト圧に応動し、か
つ、作動油の戻り管路の圧力の影響を受ける構成
からなる制御システムにおいて、前記制御弁のパ
イロツト回路部に作動油の供給管路側から戻り管
路側への流れのみを許すチエツク弁を設けると共
に、車輛における左右一対のこれ等制御弁と作動
油源側との接続を計る車高保持用シヤツトバルブ
の制御弁側供給管路と戻り管路との間に、戻り管
路側から供給管路側への流れのみを許すチエツク
弁と絞りとを直列に挿入したバイパス管路を設け
てなることを特徴とするアクテイブサスペンシヨ
ンの油圧回路。 This is an active suspension that maintains the vehicle height by controlling the internal pressure of a single-acting cylinder arranged in parallel with a suspension spring, and the hydraulic oil supply/discharge control valve for controlling the internal pressure responds to pilot pressure and In a control system that is configured to be affected by the pressure of an oil return line, a check valve is provided in the pilot circuit section of the control valve that allows hydraulic oil to flow only from the supply line side to the return line side, and Between the control valve side supply pipe and the return pipe of the vehicle height maintenance shaft valve, which connects the pair of left and right control valves to the hydraulic oil source side, only the flow from the return pipe side to the supply pipe side is connected. A hydraulic circuit for an active suspension, characterized in that a bypass line is provided in which a check valve and a throttle are inserted in series.