JPH0995251A - Hydraulic power source device for power steering - Google Patents
Hydraulic power source device for power steeringInfo
- Publication number
- JPH0995251A JPH0995251A JP7255977A JP25597795A JPH0995251A JP H0995251 A JPH0995251 A JP H0995251A JP 7255977 A JP7255977 A JP 7255977A JP 25597795 A JP25597795 A JP 25597795A JP H0995251 A JPH0995251 A JP H0995251A
- Authority
- JP
- Japan
- Prior art keywords
- steering
- state
- current
- voltage
- power source
- 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.)
- Granted
Links
Landscapes
- Power Steering Mechanism (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、自動車のパワース
テアリング用油圧源装置に係り、特に電気自動車やハイ
ブリッド電気自動車に用いて好適なものに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic power source device for power steering of an automobile, and more particularly to a device suitable for use in an electric vehicle or a hybrid electric vehicle.
【０００２】[0002]
【従来の技術】ドライバがステアリング・ホイールを回
す力を油圧等で補助するパワーステアリング装置とし
て、従来、図３に示すようなものがある。2. Description of the Related Art Conventionally, there is a power steering apparatus as shown in FIG. 3 as a power steering apparatus for assisting a driver to turn a steering wheel by hydraulic pressure or the like.
【０００３】これは、油圧式パワーステアリング装置に
おけるパワーシリンダ１に方向切替弁２を介して圧油を
供給するオイルポンプ３が電動モータ４で回転駆動さ
れ、回転数に比例した圧油を吐出するようになっている
と共に、この電動モータ４はコントローラ５により、操
舵トルクを検出するトルクセンサ６の出力信号に比例し
た回転速度で一方向に回転駆動されるようになってい
る。This is because an oil pump 3 for supplying pressure oil to a power cylinder 1 in a hydraulic power steering device via a direction switching valve 2 is rotationally driven by an electric motor 4 and discharges pressure oil proportional to the number of revolutions. In addition, the controller 5 drives the electric motor 4 to rotate in one direction at a rotation speed proportional to the output signal of the torque sensor 6 for detecting the steering torque.
【０００４】従って、ハンドル７が操作されていない、
直進走行状態においては、トルクセンサ６の出力は０で
あり、この状態においては電動モータ４は起動されず、
オイルポンプ３は駆動されていない。ハンドル７が操作
されると、入，出力軸の相対回転で方向切替弁２がパワ
ーシリンダ１の所定の一方室に圧油を供給すべく切り替
えられると共に、ハンドルトルクがトルクセンサ６にて
検出され、その検出信号がコントローラ５に入力され
る。これによってコントローラ５はトルクセンサ６の出
力信号に比例した回転速度で電動モータ４を一方向に回
転制御するのである。Therefore, the handle 7 is not operated,
In the straight running state, the output of the torque sensor 6 is 0, and in this state, the electric motor 4 is not started,
The oil pump 3 is not driven. When the handle 7 is operated, the direction switching valve 2 is switched to supply pressure oil to a predetermined one chamber of the power cylinder 1 by relative rotation of the input and output shafts, and the handle torque is detected by the torque sensor 6. The detection signal is input to the controller 5. As a result, the controller 5 controls the rotation of the electric motor 4 in one direction at a rotation speed proportional to the output signal of the torque sensor 6.
【０００５】[0005]
【発明が解決しようとする課題】ところで、上述した従
来の油圧式パワーステアリング装置にあっては、非操舵
時には電動モータの駆動を停止して省エネルギーを図っ
ているが、これだと操舵開始時の油圧の立ち上がりが遅
いため、ハンドル操作が重くフィーリングが悪いという
難点がある。By the way, in the above-mentioned conventional hydraulic power steering device, the drive of the electric motor is stopped during non-steering to save energy. Since the hydraulic pressure rises slowly, there is the problem that the handle is heavy and the feeling is bad.
【０００６】そのため、特にエンジン駆動のトラック等
大型自動車の油圧式パワーステアリング装置では、省エ
ネルギーを諦めて電動モータを常時駆動することによっ
て、上記操作性の不具合を解消している。Therefore, particularly in a hydraulic power steering device for a large automobile such as an engine-driven truck, the operability problem is solved by giving up energy saving and constantly driving the electric motor.
【０００７】ところが、最近では、無公害自動車の観点
からトラック等大型自動車の電気自動車化又はハイブリ
ッド電気自動車化が急速に進行しており、これらにあっ
ては、上記電動モータを常時駆動して空回りさせること
は、動力源である電池の大きなムダ使いとなることか
ら、その対策が急がれている。また、このようなトラッ
クの場合、電動モータが１台だと大容量のモータが必要
となり、コストアップを招来するという問題点もあっ
た。However, recently, from the viewpoint of pollution-free automobiles, large-sized automobiles such as trucks are rapidly becoming electric vehicles or hybrid electric vehicles. In these cases, the electric motor is constantly driven to run idle. This causes a large waste of the battery, which is the power source, so countermeasures are urgently needed. Further, in the case of such a truck, there is a problem that a single electric motor requires a large-capacity motor, resulting in an increase in cost.
【０００８】そこで、本発明の目的は、操舵開始時の油
圧応答性を確保すると共に省エネルギーも図れるパワー
ステアリング用油圧源装置を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a hydraulic power source device for a power steering system, which can ensure hydraulic response at the start of steering and save energy.
【０００９】[0009]
【課題を解決するための手段】本発明に係るパワーステ
アリング用油圧源装置は、油圧式パワーステアリング装
置に作動油を供給すべく設けられ電動モータによって常
時駆動される電動ポンプと、同電動モータに流れる電流
を検出する電流検出手段と、上記電動モータに操舵時用
の第１所定電圧を供給する第１状態と同第１所定電圧よ
り低い非操舵時用の第２所定電圧を供給する第２状態と
に切替可能に設けられた制御手段とを有し、同制御手段
は、上記第２状態で上記電流検出手段から検出される電
流が第１所定電流以上になったことを検知すると上記第
１状態に切り替え、上記第１状態で上記電流検出手段か
ら検出される電流が第２所定電流以下になったことを検
知すると上記第２状態に切り替えるよう構成されている
ことを特徴とする。A hydraulic power source device for a power steering according to the present invention includes an electric pump which is provided for supplying hydraulic oil to a hydraulic power steering device and which is constantly driven by an electric motor, and an electric pump. A current detecting means for detecting a flowing current; a second state for supplying a first predetermined voltage for steering to the electric motor; and a second predetermined voltage for non-steering lower than the first predetermined voltage. And a control means provided so as to be switchable between the first state and the second state. The control means detects the fact that the current detected by the current detection means in the second state is equal to or higher than a first predetermined current. It is configured to switch to the first state, and to switch to the second state when it is detected that the current detected by the current detecting means in the first state has become equal to or less than a second predetermined current.
【００１０】上記構成によれば、ポンプ負荷が小さくて
電動モータに流れる電流値が下がる非操舵時には第２所
定電圧が電動モータに供給されると共に、ポンプ負荷が
大きくて上記電流値が上がる操舵時には第２所定電圧よ
り高い第１所定電圧が電動モータに供給される。この切
替は、制御手段が電動モータに流れる電流を検出して行
なわれる。According to the above configuration, the second predetermined voltage is supplied to the electric motor during non-steering when the pump load is small and the current value flowing through the electric motor is low, and at the time of steering when the pump load is large and the current value is high. A first predetermined voltage higher than the second predetermined voltage is supplied to the electric motor. This switching is performed by the control means detecting the current flowing through the electric motor.
【００１１】また、上記電動ポンプは、上記パワーステ
アリング装置に対して並列に接続され、それぞれ独立し
たモータによって駆動される第１及び第２ポンプを有し
て構成され、上記制御手段は、上記第１状態では上記両
ポンプのモータに上記第１電圧を供給し、上記第２状態
では上記第１及び第２ポンプのうちの一方のモータに上
記第２電圧を供給すると共に他方のモータへの給電は停
止するよう構成されていることを特徴とする。Further, the electric pump is configured to have first and second pumps connected in parallel to the power steering device and driven by independent motors, and the control means is the first pump. In the first state, the first voltage is supplied to the motors of the both pumps, and in the second state, the second voltage is supplied to one of the first and second pumps and the power is supplied to the other motor. Is configured to stop.
【００１２】上記構成によれば、ポンプ負荷が小さくて
小容量で足りる非操舵時には一つのポンプが稼働し、ポ
ンプ負荷が大きくて大容量が必要な操舵時には二つのポ
ンプが稼働される。According to the above construction, one pump is operated during non-steering when the pump load is small and a small capacity is sufficient, and two pumps are operated during steering where the pump load is large and a large capacity is required.
【００１３】また、上記制御手段は、上記第２状態で給
電を停止するモータを交互に切り換わるよう構成される
ことを特徴とする。Further, the control means is configured so as to alternately switch the motors that stop the power supply in the second state.
【００１４】上記構成によれば、非操舵時には二つのモ
ータが交互に使用される。According to the above construction, the two motors are alternately used during non-steering.
【００１５】[0015]
【発明の実施の形態】以下、本発明に係るパワーステア
リング用油圧源装置の一実施例を添付図面に基づいて詳
細に説明する。図１は本パワーステアリング用油圧源装
置の概略構成図、図２はコントローラの動作手順を示す
フローチャートである。尚、図１において図３と同一部
材には同一符号を付して重複する説明は省略する。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a hydraulic power source device for power steering according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram of the present hydraulic power source device for power steering, and FIG. 2 is a flowchart showing an operation procedure of a controller. In FIG. 1, the same members as those in FIG. 3 are designated by the same reference numerals, and overlapping description will be omitted.
【００１６】図１に示すように、油圧式パワーステアリ
ング装置におけるパワーシリンダ１に方向切替弁２を介
して圧油を供給する小型小容量（乗用車用）の二つのオ
イルポンプ３Ａ，３Ｂが並列に回路構成される。これら
オイルポンプ３Ａ，３Ｂは、それぞれ電動モータ４Ａ，
４Ｂで回転駆動され、回転数に比例した圧油を吐出する
ようになっていると共に、これら電動モータ４Ａ，４Ｂ
はコントローラ５により駆動制御される。As shown in FIG. 1, two small oil pumps 3A and 3B of small capacity (for passenger cars) for supplying pressure oil to a power cylinder 1 in a hydraulic power steering device via a direction switching valve 2 are arranged in parallel. The circuit is configured. These oil pumps 3A and 3B are respectively provided with electric motors 4A and 4A.
It is driven to rotate by 4B and discharges pressure oil proportional to the number of rotations, and these electric motors 4A, 4B
Is controlled by the controller 5.
【００１７】前記コントローラ５は、両電動モータ４
Ａ，４Ｂを流れる電流を検出する電流検出回路５ａを備
え、検出した電流値から操舵状態を判断し、ポンプ負荷
が大きくて電流値が上がる操舵時は両電動モータ４Ａ，
４Ｂを正規モードとして正規電圧（第１電圧）を供給す
ると共に、ポンプ負荷が小さくて電流値が下がる非操舵
時には両電動モータ４Ａ，４Ｂをスタンバイモードとし
ていづれか一方の電動モータ４Ａ又は４Ｂに正規電圧よ
り低い電圧（第２電圧）を供給する一方いづれか他方の
電動モータ４Ｂ又は４Ａへは給電は停止するようになっ
ている。The controller 5 is a dual electric motor 4
A current detection circuit 5a for detecting a current flowing through A and 4B is provided, the steering state is judged from the detected current value, and both electric motors 4A and 4A are operated at the time of steering when the pump load is large and the current value increases.
4B is set to the normal mode to supply a normal voltage (first voltage), and at the time of non-steering when the pump load is small and the current value decreases, both electric motors 4A and 4B are set to the standby mode and either one of the electric motors 4A and 4B is supplied with the normal voltage. The electric power supply to the electric motor 4B or 4A, which supplies the lower voltage (second voltage), is stopped.
【００１８】上記スタンバイモードで給電を停止する電
動モータは交互に切り換えられると、モータ寿命の上で
好適である。尚、図中８はバッテリで、９はキースイッ
チである。If the electric motors that stop the power supply in the standby mode are switched alternately, it is preferable from the standpoint of motor life. In the figure, 8 is a battery and 9 is a key switch.
【００１９】次に、前記コントローラ５の動作手順を図
２のフローチャートを用いて説明する。先ず、ステップ
Ｐ１における両電動モータ４Ａ，４Ｂのスタンバイモー
ドからステップＰ２で両電動モータ４Ａ，４Ｂに流れる
電流ｉを検出した後、ステップＰ３で両電動モータ４
Ａ，４Ｂがスタンバイモードか否かが判定される。Next, the operation procedure of the controller 5 will be described with reference to the flowchart of FIG. First, after detecting the current i flowing through both electric motors 4A and 4B from the standby mode of both electric motors 4A and 4B in step P1, in step P2, the electric motors 4A and 4B are detected in step P3.
It is determined whether A and 4B are in the standby mode.
【００２０】ステップＰ３で正規モードであれば、ステ
ップＰ４で上記電流ｉが第１所定電流（正規モードから
スタンバイモードへの切替しきい値電流）ｉB より大き
いか否かを判定し、大きければステップＰ１へ戻り、同
じか小さければステップＰ６で正規モードにしてからス
テップＰ２へ戻る。If it is in the normal mode in step P3, it is determined in step P4 whether or not the current i is larger than the first predetermined current (switching threshold current from the normal mode to the standby mode) i B. Returning to step P1, if the same or smaller, the normal mode is set in step P6 and then returning to step P2.
【００２１】ステップＰ３でスタンバイモードであれ
ば、ステップＰ５で上記電流ｉが第２所定電流（スタン
バイモードから正規モードへの切替しきい値電流）ｉA
より小さいか否かを判定し、小さければステップＰ１へ
戻り、同じか大きければステップＰ６で正規モードにし
てからステップＰ２へ戻る。尚、第１所定電流ｉB と第
２所定電流ｉA とは、ｉB ＜ｉA の関係にある。If the mode is the standby mode in step P3, the current i is the second predetermined current (switch threshold current from the standby mode to the normal mode) i A in step P5.
If it is smaller than the normal mode, the process returns to step P1. The first predetermined current i B and the second predetermined current i A have a relationship of i B <i A.
【００２２】上記実施例では、オイルポンプ３Ａ，３Ｂ
及び電動モータ４Ａ，４Ｂを二個宛て設けたが、本発明
は一個宛てでも良いことは言うまでもない。また、上記
実施例において、スタンバイモードで二つのオイルポン
プ３Ａ，３Ｂを稼働させてもよい。In the above embodiment, the oil pumps 3A and 3B are used.
Also, although the two electric motors 4A and 4B are provided, it goes without saying that the present invention may be provided for one. Further, in the above embodiment, the two oil pumps 3A and 3B may be operated in the standby mode.
【００２３】[0023]
【発明の効果】請求項１の発明によれば、電動ポンプは
電動モータによって常時駆動されているため操舵開始時
の油圧応答性を確保することが出来るし、非操舵時に供
給される第２所定電圧は操舵時用の第１所定電圧より低
いので省エネルギーを図ることも出来る。また、非操舵
状態から操舵状態への移行及び操舵状態から非操舵状態
への移行を、電動モータを流れる電流により検出するた
め、操舵状態検出のために操舵角センサ等の高価なセン
サを必要としない利点もある。According to the invention of claim 1, since the electric pump is constantly driven by the electric motor, the hydraulic response at the start of steering can be ensured, and the second predetermined value supplied at the time of non-steering. Since the voltage is lower than the first predetermined voltage for steering, it is possible to save energy. Further, since the transition from the non-steering state to the steering state and the transition from the steering state to the non-steering state are detected by the electric current flowing through the electric motor, an expensive sensor such as a steering angle sensor is required for detecting the steering state. There is also an advantage not to.
【００２４】請求項２の発明によれば、二つのポンプを
使用することで、高価な大容量のポンプを必要とするこ
とがないし、効率良く省エネルギーを図ることができ
る。According to the second aspect of the present invention, by using two pumps, an expensive large-capacity pump is not required, and energy can be efficiently saved.
【００２５】請求項３の発明によれば、モータの寿命を
効率良く延ばすことができる。According to the invention of claim 3, the life of the motor can be effectively extended.
【図１】本発明の一実施例を示す本パワーステアリング
用油圧源装置の概略構成図である。FIG. 1 is a schematic configuration diagram of a hydraulic power source device for a power steering according to an embodiment of the present invention.
【図２】コントローラの動作手順を示すフローチャート
である。FIG. 2 is a flowchart showing an operation procedure of a controller.
【図３】従来のパワーステアリング用油圧源装置の概略
構成図である。FIG. 3 is a schematic configuration diagram of a conventional hydraulic power source device for power steering.
１ パワーシリンダ ２ 方向切替弁 ３Ａ，３Ｂ オイルポンプ ４Ａ，４Ｂ 電動モータ ５ コントローラ ５ａ 電流検出回路 1 power cylinder 2 direction switching valve 3A, 3B oil pump 4A, 4B electric motor 5 controller 5a current detection circuit
Claims (3)
を供給すべく設けられ電動モータによって常時駆動され
る電動ポンプと、 同電動モータに流れる電流を検出する電流検出手段と、 上記電動モータに操舵時用の第１所定電圧を供給する第
１状態と同第１所定電圧より低い非操舵時用の第２所定
電圧を供給する第２状態とに切替可能に設けられた制御
手段とを有し、 同制御手段は、上記第２状態で上記電流検出手段から検
出される電流が第１所定電流以上になったことを検知す
ると上記第１状態に切り替え、上記第１状態で上記電流
検出手段から検出される電流が第２所定電流以下になっ
たことを検知すると上記第２状態に切り替えるよう構成
されていることを特徴とするパワーステアリング用油圧
源装置。1. An electric pump which is provided to supply hydraulic oil to a hydraulic power steering device and which is constantly driven by an electric motor, a current detecting means for detecting a current flowing through the electric motor, and a steering wheel for the electric motor. A first state for supplying a first predetermined voltage for driving and a second state for supplying a second predetermined voltage for non-steering which is lower than the first predetermined voltage. The control means switches to the first state when detecting that the current detected by the current detecting means in the second state has become equal to or higher than the first predetermined current, and detects from the current detecting means in the first state. The power source hydraulic power source device for power steering, wherein the power steering hydraulic power source device is configured to switch to the second state when it is detected that the applied current becomes equal to or less than a second predetermined current.
ング装置に対して並列に接続され、それぞれ独立したモ
ータによって駆動される第１及び第２ポンプを有して構
成され、 上記制御手段は、上記第１状態では上記両ポンプのモー
タに上記第１電圧を供給し、上記第２状態では上記第１
及び第２ポンプのうちの一方のモータに上記第２電圧を
供給すると共に他方のモータへの給電は停止するよう構
成されている請求項１に記載のパワーステアリング用油
圧源装置。2. The electric pump is configured to have first and second pumps that are connected in parallel to the power steering device and are driven by independent motors, respectively, and the control means includes the first and second pumps. In the 1st state, the first voltage is supplied to the motors of the both pumps, and in the 2nd state, the first voltage is supplied.
The hydraulic power source device for power steering according to claim 1, wherein the second voltage is supplied to one motor of the second pump and the power supply to the other motor is stopped.
停止するモータを交互に切り換わるよう構成される請求
項２に記載のパワーステアリング用油圧源装置。3. The hydraulic power source device for power steering according to claim 2, wherein the control means is configured to alternately switch a motor that stops power supply in the second state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7255977A JP3030414B2 (en) | 1995-10-03 | 1995-10-03 | Hydraulic power unit for power steering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7255977A JP3030414B2 (en) | 1995-10-03 | 1995-10-03 | Hydraulic power unit for power steering |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0995251A true JPH0995251A (en) | 1997-04-08 |
| JP3030414B2 JP3030414B2 (en) | 2000-04-10 |
Family
ID=17286200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7255977A Expired - Fee Related JP3030414B2 (en) | 1995-10-03 | 1995-10-03 | Hydraulic power unit for power steering |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3030414B2 (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001048029A (en) * | 1999-08-06 | 2001-02-20 | Hino Motors Ltd | Power steering device for hybrid vehicle |
| JP2002284028A (en) * | 2001-03-28 | 2002-10-03 | Kayaba Ind Co Ltd | Power steering device |
| NL1018699C2 (en) * | 2001-08-03 | 2003-02-04 | Skf Ab | Spare hydraulic system for steering system with control via wire. |
| EP1544078A1 (en) * | 2003-12-18 | 2005-06-22 | Hydroperfect International Hpi | Electro-hydraulic power steering system for a motor vehicle |
| JP2013129243A (en) * | 2011-12-20 | 2013-07-04 | Daimler Ag | Power steering system |
| JP2013184585A (en) * | 2012-03-08 | 2013-09-19 | Daimler Ag | Power steering device for vehicle |
| US20140257638A1 (en) * | 2013-03-07 | 2014-09-11 | Jtekt Corporation | Control apparatus for hydraulic power steering system |
| JP2015030402A (en) * | 2013-08-05 | 2015-02-16 | 株式会社ジェイテクト | Control device of hydraulic power steering device |
| JP2015037918A (en) * | 2013-08-19 | 2015-02-26 | 株式会社ジェイテクト | Controller for hydraulic power steering device |
| JP2015077925A (en) * | 2013-10-18 | 2015-04-23 | 株式会社ジェイテクト | Hydraulic power steering device |
| JP2015081032A (en) * | 2013-10-23 | 2015-04-27 | 株式会社ジェイテクト | Hydraulic power steering device |
| KR20160038138A (en) * | 2014-09-29 | 2016-04-07 | 현대모비스 주식회사 | Motor control method dual mpu hydraulic circuit system |
| FR3043628A1 (en) * | 2015-11-16 | 2017-05-19 | Bluebus | ELECTROHYDRAULIC POWER STEERING SYSTEM AND ELECTRIC VEHICLE EQUIPPED WITH SUCH A SYSTEM. |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU1891599A (en) | 1998-01-19 | 1999-08-02 | Asahi Kasei Kogyo Kabushiki Kaisha | Lint-free wiper |
-
1995
- 1995-10-03 JP JP7255977A patent/JP3030414B2/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001048029A (en) * | 1999-08-06 | 2001-02-20 | Hino Motors Ltd | Power steering device for hybrid vehicle |
| JP2002284028A (en) * | 2001-03-28 | 2002-10-03 | Kayaba Ind Co Ltd | Power steering device |
| NL1018699C2 (en) * | 2001-08-03 | 2003-02-04 | Skf Ab | Spare hydraulic system for steering system with control via wire. |
| WO2003011675A1 (en) * | 2001-08-03 | 2003-02-13 | Ab Skf | Back up hydraulic system for steer-by-wire system |
| EP1544078A1 (en) * | 2003-12-18 | 2005-06-22 | Hydroperfect International Hpi | Electro-hydraulic power steering system for a motor vehicle |
| US7303044B2 (en) | 2003-12-18 | 2007-12-04 | Hydroperfect International | Electro-hydraulic power steering assist system for an automobile |
| JP2013129243A (en) * | 2011-12-20 | 2013-07-04 | Daimler Ag | Power steering system |
| JP2013184585A (en) * | 2012-03-08 | 2013-09-19 | Daimler Ag | Power steering device for vehicle |
| US20140257638A1 (en) * | 2013-03-07 | 2014-09-11 | Jtekt Corporation | Control apparatus for hydraulic power steering system |
| US9174669B2 (en) | 2013-03-07 | 2015-11-03 | Jtekt Corporation | Control apparatus for hydraulic power steering system |
| JP2015030402A (en) * | 2013-08-05 | 2015-02-16 | 株式会社ジェイテクト | Control device of hydraulic power steering device |
| JP2015037918A (en) * | 2013-08-19 | 2015-02-26 | 株式会社ジェイテクト | Controller for hydraulic power steering device |
| JP2015077925A (en) * | 2013-10-18 | 2015-04-23 | 株式会社ジェイテクト | Hydraulic power steering device |
| JP2015081032A (en) * | 2013-10-23 | 2015-04-27 | 株式会社ジェイテクト | Hydraulic power steering device |
| KR20160038138A (en) * | 2014-09-29 | 2016-04-07 | 현대모비스 주식회사 | Motor control method dual mpu hydraulic circuit system |
| FR3043628A1 (en) * | 2015-11-16 | 2017-05-19 | Bluebus | ELECTROHYDRAULIC POWER STEERING SYSTEM AND ELECTRIC VEHICLE EQUIPPED WITH SUCH A SYSTEM. |
| WO2017084927A1 (en) * | 2015-11-16 | 2017-05-26 | Bluebus | Power steering electrohydraulic system and electric vehicle fitted with such a system |
| US10618550B2 (en) | 2015-11-16 | 2020-04-14 | Bluebus | Power steering electrohydraulic system and electric vehicle fitted with such a system |
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| Publication number | Publication date |
|---|---|
| JP3030414B2 (en) | 2000-04-10 |
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