公开(公告)号：US5631529A

公开(公告)日：1997-05-20

申请号：US456527

申请日：1995-06-01

申请人： Yasuo Shimizu ,  Yashito Nakamura ,  Yoshiki Noro

发明人： Yasuo Shimizu ,  Yashito Nakamura ,  Yoshiki Noro

IPC分类号： B62D6/02 ,  B62D5/04

CPC分类号： B62D5/0463

摘要： An electric power steering apparatus provides a steering power assist of a motor to the steering system of an associated automotive vehicle, so as to reduce necessary steering power to be applied by a driver. The steering apparatus includes an attenuation device in the form of a phase delay circuit or an active low-pass filter, which is provided in a feedback loop connecting a motor current detector and a control section of a control unit constituting the vehicle steering system. By the attenuation device attenuating relatively high frequency components of motor current detected by the motor current detector, there is achieved a high-performance electric power steering apparatus which is capable of reducing noise in the feedback loop, without affecting the motor current, to a sufficient degree to highly improve a response to a driver's steering operation.

摘要翻译： 电动助力转向装置向相关机动车辆的转向系统提供电动机的转向动力辅助，以便减少驾驶员施加的必要转向动力。 转向装置包括相位延迟电路或有源低通滤波器形式的衰减装置，该衰减装置设置在连接电动机电流检测器和构成车辆转向系统的控制单元的控制部分的反馈回路中。 通过衰减装置衰减由电动机电流检测器检测的电动机电流的相对较高的频率分量，实现了一种高性能电动助力转向装置，其能够将反馈回路中的噪声减小而不影响电动机电流，达到足够的 以高度改善驾驶员转向操作的响应程度。

公开(公告)号：US5596252A

公开(公告)日：1997-01-21

申请号：US353300

申请日：1994-12-06

申请人： Yasuo Shimizu ,  Shinzi Hironaka ,  Yoshinobu Mukai ,  Shigieru Yamawaki

发明人： Yasuo Shimizu ,  Shinzi Hironaka ,  Yoshinobu Mukai ,  Shigieru Yamawaki

IPC分类号： B62D5/04 ,  H02P7/00

CPC分类号： B62D5/0463 ,  B62D5/0466

摘要： An electrically operated power steering apparatus basically has a steering torque sensor, a steering rotational speed sensor, and preferably a vehicle sensor. A controller outputs a motor control signal based on a steering torque, a steering rotational speed, and a vehicle speed which are detected by the steering torque sensor, the steering rotational speed sensor, and the vehicle sensor, respectively. The motor control signal is applied to control a motor driver to output a motor drive signal which energizes an electric motor to produce an assistive steering force or a braking force. The electrically operated power steering apparatus is effective to improve steering and returning characteristics of a steering system, and give the steering system a stable steering capability.

摘要翻译： 电动助力转向装置基本上具有转向扭矩传感器，转向转速传感器，优选车辆传感器。 控制器基于转向转矩传感器，转向转速传感器和车辆传感器检测到的转向转矩，转向转速和车速分别输出电动机控制信号。 施加电动机控制信号以控制电动机驱动器输出对电动机通电以产生辅助转向力或制动力的电动机驱动信号。 电动动力转向装置有效地改善转向系统的转向和返回特性，并且使转向系统具有稳定的转向能力。

公开(公告)号：US5590732A

公开(公告)日：1997-01-07

申请号：US281183

申请日：1994-07-27

申请人： Mitsutaka Sugino ,  Yasuo Shimizu

发明人： Mitsutaka Sugino ,  Yasuo Shimizu

IPC分类号： B62D5/04

CPC分类号： B62D5/0448 ,  B62D5/0427

摘要： An electrically assisted power steering system for a motor vehicle includes a housing, a shaft slidably supported in the housing, a ball-and-nut mechanism operatively mounted on the shaft, and an electric motor mounted in the housing for transmitting rotary force from the electric motor through the ball-and-nut mechanism to the shaft. The ball-and-nut mechanism including a nut assembly disposed around the shaft and having one end rockably and rotatably supported in the housing by a four-point contact bearing or an automatic aligning bearing, and a plurality of balls movably held between an opposite end of the nut assembly and a screw groove defined in the shaft.

摘要翻译： 一种用于机动车辆的电辅助动力转向系统包括壳体，可滑动地支撑在壳体中的轴，可操作地安装在轴上的滚珠和螺母机构，以及安装在壳体中的电动马达，用于将电动力从电动 电机通过球螺母机构到轴。 所述滚珠螺母机构包括设置在所述轴周围的螺母组件，所述螺母组件通过四点接触轴承或自动调心轴承可摇摆地且可旋转地支撑在所述壳体中，以及可移动地保持在相对端 的螺母组件和限定在轴中的螺纹槽。

公开(公告)号：US5503239A

公开(公告)日：1996-04-02

申请号：US449170

申请日：1995-05-24

申请人： Yasuo Shimizu

发明人： Yasuo Shimizu

IPC分类号： B62D1/16 ,  B62D3/12 ,  B62D5/04 ,  B62D6/02 ,  B62D9/00

CPC分类号： B62D3/123 ,  B62D1/166 ,  Y10T74/19555

摘要： A first shaft and a second shaft are rotatably supported by a casing in a mutually parallel but offset manner, and an intermediate member is interposed between mutually opposing axial ends of these shafts. The intermediate member transmits torque from the first shaft to the second shaft, but the intermediate member is radially slidable relative to the first shaft and is engaged with a radially offset point of the second shaft. Because the distance between the axial center line of the first shaft and the point of engagement between the intermediate member and the second shaft changes with the angular displacement of the first shaft, a desired nonlinear property can be accomplished between the angular displacements of the first shaft and the second shaft. This property can be used for achieving a desired variable gear ratio suitable for the steering device. Further, the mutual sliding movement between the first shaft and the intermediate shaft in the radial direction accommodates such a relationship, and it can be achieved in a dimensionally accurate and play free manner because the movements of the moveable members strictly consist of rotational movements of circular members and simple linear movements. Roller bearings and ball bearings should be used in various parts to minimize plays.

摘要翻译： 第一轴和第二轴以相互平行但偏移的方式由壳体可旋转地支撑，并且中间构件插入在这些轴的彼此相对的轴向端部之间。 中间构件将扭矩从第一轴传递到第二轴，但是中间构件相对于第一轴可径向滑动并且与第二轴的径向偏移点接合。 因为第一轴的轴向中心线与中间构件和第二轴之间的接合点之间的距离随着第一轴的角位移而变化，因此可以在第一轴的角位移之间实现期望的非线性特性 和第二轴。 该性能可以用于实现适合于转向装置的期望的可变齿轮比。 此外，第一轴和中间轴之间在径向方向上的相互滑动运动适应这种关系，并且可以以尺寸精确和自由的方式实现，因为可移动构件的运动严格地包括圆形的旋转运动 成员和简单的线性运动。 滚子轴承和滚珠轴承应用于各种部件，以尽量减少播放。

公开(公告)号：US5473539A

公开(公告)日：1995-12-05

申请号：US164884

申请日：1993-12-10

申请人： Yasuo Shimizu ,  Yoshito Nakamura ,  Shinzi Hironaka ,  Yoshinobu Mukai ,  Yoshiki Noro

发明人： Yasuo Shimizu ,  Yoshito Nakamura ,  Shinzi Hironaka ,  Yoshinobu Mukai ,  Yoshiki Noro

IPC分类号： B62D5/04

CPC分类号： B62D5/0463 ,  B62D5/0466

摘要： An electrically operated power steering apparatus in a motor vehicle has a steering system for steering the motor vehicle, a steering torque detector for detecting a manual steering torque applied to the steering system, and an electric motor for generating an assistive torque to be transmitted as a steering assistive force to the steering system. An actual assistive torque detector detects an actual assistive steering torque which is actually transmitted from the electric motor to the steering system. A controller has at least a target assistive torque generator for generating a target value for an assistive torque to be generated by the electric motor depending on the manual steering torque detected by the steering torque detector, and generates a control signal based on the difference between the actual assistive steering torque detected by the actual assistive torque detector and the target value generated by the target assistive torque generator. The electric motor is energized by a motor driver based on the control signal from the controller.

摘要翻译： 机动车辆中的电动动力转向装置具有用于转向机动车辆的转向系统，用于检测施加到转向系统的手动转向转矩的转向转矩检测器，以及用于产生将被作为转向系统传递的辅助转矩的电动机 转向辅助力转向系统。 实际的辅助转矩检测器检测实际的从电动机向转向系统发送的辅助转向转矩。 控制器至少具有目标辅助扭矩发生器，用于根据由转向转矩检测器检测到的手动转向转矩来产生由电动机产生的辅助转矩的目标值，并且基于该转向转矩检测器之间的差产生控制信号 由实际辅助转矩检测器检测到的实际辅助转向转矩和由目标辅助扭矩发生器产生的目标值。 基于来自控制器的控制信号，电动机由电动机驱动器通电。

公开(公告)号：US4819170A

公开(公告)日：1989-04-04

申请号：US27378

申请日：1987-03-18

申请人： Yasuo Shimizu

发明人： Yasuo Shimizu

IPC分类号： B62D5/04 ,  B62D6/00 ,  B62D5/06

CPC分类号： B62D5/0463

摘要： A motor-driven power steering system for an automotive vehicle has a control device for controlling a motor to generate assistive torque to be applied to an output shaft based on output signals from a torque detecting mechanism which detects steering torque acting on an input shaft. The control device has a control signal generating circuit for generating control signals including a component based on the steering torque signals, and a driving circuit responsive to the control signals for supplying a driving signal to said motor. The steering system also includes a mechanism for detecting a steering speed, a mechanism for detecting a vehicle speed, and a correcting mechanism for correcting a basic component based on the steering speed such that it is reduced as the vehicle speed increases. The control signal generating circuit receives a corrected steering speed component from the correcting mechanism and adds the corrected steering speed component to the steering torque component for generating the control signals including the corrected steering speed component.

摘要翻译： 用于机动车辆的电动机动力转向系统具有控制装置，用于根据检测作用在输入轴上的转向转矩的转矩检测机构的输出信号，控制电动机产生施加到输出轴的辅助转矩。 控制装置具有控制信号发生电路，用于产生包括基于转向转矩信号的分量的控制信号，以及响应于用于向所述电动机提供驱动信号的控制信号的驱动电路。 转向系统还包括用于检测转向速度的机构，用于检测车速的机构，以及用于基于转向速度校正基本部件的校正机构，使得其随着车速增加而减小。 控制信号发生电路从校正机构接收校正的转向速度分量，并将修正的转向速度分量与用于产生包括校正转向速度分量的控制信号的转向转矩分量相加。

公开(公告)号：US4783626A

公开(公告)日：1988-11-08

申请号：US27590

申请日：1987-03-18

申请人： Yasuo Shimizu

发明人： Yasuo Shimizu

IPC分类号： G01B7/00 ,  B62D5/04 ,  B62D6/10 ,  B62D15/02 ,  G01B7/02 ,  G01D5/22 ,  G01B7/14 ,  G08C19/08

CPC分类号： G01D5/2266 ,  B62D6/10 ,  G01B7/02 ,  G01D5/2216

摘要： A displacement detector includes a movable member of a magnetic material movable as a function of the displacement of an object which is to be detected, an AC signal source, a primary coil energizable by an AC signal supplied by the AC signal source for generating a magnetic field in the direction in which the movable member is movable, secondary coils located in at least two positions spaced along and disposed around the path of movement of the movable member, a third coil disposed in the range of movement of the movable member and around the path of movement of the movable member, first, second, and third rectifier circuits connected respectively to the secondary coils and the third coils, and a processing circuit for processing outputs supplied from the first, second, and third rectifier circuits. The displacement detector can be incorporated in an automotive power steering device having input and output shafts coaxially coupled to each other by a resilient member which is twistable about its own axis.

摘要翻译： 位移检测器包括可移动的磁性材料的可移动构件，其作为待检测物体的位移的函数，AC信号源，由AC信号源提供的用于产生磁性的AC信号激励的初级线圈 在可移动部件可移动的方向上的二次线圈位于沿着可移动部件的移动路径间隔开并且围绕可移动部件的移动路径设置的至少两个位置，设置在可动部件的运动范围内并围绕 可移动部件，第一，第二和第三整流电路分别连接到次级线圈和第三线圈的移动路径，以及用于处理从第一，第二和第三整流器电路提供的输出的处理电路。 位移检测器可以结合在具有通过围绕其自身轴线可扭转的弹性构件彼此同轴联接的输入和输出轴的汽车动力转向装置中。

公开(公告)号：US4771845A

公开(公告)日：1988-09-20

申请号：US40972

申请日：1987-04-21

申请人： Yasuo Shimizu

发明人： Yasuo Shimizu

IPC分类号： B62D5/04 ,  B62D6/00

CPC分类号： B62D5/0463 ,  B62D5/0496 ,  F16H2025/2096

摘要： A motor-driven power steering system has a steering mechanism for interconnecting a steering wheel and a steerable wheel. An electric motor applies a steering assistive force to the steering mechanism. A plurality of frictional elements are each provided with a lubricating material having a temperature-dependent viscosity. The motor-driven power steering system also includes a steering torque detector for detecting a steering torque applied by the steering wheel through the steering mechanism and for generating a signal indicative of the steering torque a temperature detects for detecting the temperature of at least one of the frictional elements and generates a signal indicative of the temperature. A motor control signal generator generates a motor control signal based on at least the signals from the steering torque detector and the temperature detector. A motor driver controls the electric motor based on the motor control signal. There is also disclosed a method of controlling the motor-driven power steering system by controlling the electric motor irrespective of the friction of the frictional elements which varies dependent on the temperature.

摘要翻译： 电动动力转向系统具有用于互连方向盘和可转向车轮的转向机构。 电动机对转向机构施加转向辅助力。 多个摩擦元件各自设置有具有温度依赖性粘度的润滑材料。 马达驱动的动力转向系统还包括转向扭矩检测器，用于检测由方向盘通过转向机构施加的转向扭矩，并且用于产生指示转向转矩的信号，温度检测用于检测至少一个的温度 摩擦元件并产生指示温度的信号。 电动机控制信号发生器至少基于来自转向转矩检测器和温度检测器的信号产生电动机控制信号。 电机驱动器根据电机控制信号控制电动机。 还公开了一种通过控制电动机来控制电动机动力转向系统的方法，而不管摩擦元件的摩擦随温度而变化。

公开(公告)号：US4743817A

公开(公告)日：1988-05-10

申请号：US914527

申请日：1986-10-03

申请人： Yasuo Shimizu

发明人： Yasuo Shimizu

IPC分类号： B62D5/04 ,  H02K23/66

CPC分类号： B62D5/0403 ,  B62D5/0415 ,  H02K23/66

摘要： An electromagnetic servo unit is constituted with an outer casing (1), a first shaft (8) and a second shaft (5) both rotatably supported by the casing, an electric motor (101) built in the casing coaxially with the second shaft, the electric motor having an armature (10, 11) coaxially mounted on the second shaft, a torque detecting mechanism (8b, 22, 16, 21, 12) for detecting torque applied to either of the first and second shafts, and a control mechanism (21, 14, 15) for, receiving a detection signal from the torque detecting mechanism, controlling to start the electric motor. The torque detecting mechanism is arranged inside the casing, and the first and second shafts are mutually actuatably engaged with each other within the casing through the torque detecting mechanism. Preferably, the first and second shafts are coaxially supported by the casing, and have a relative angular displacement there between made use of for, when it is developed exceeding a predetermined angle range (.theta.), starting the electric motor. The first and second shafts are adapted to serve either as an input and the other as an output shaft.

摘要翻译： 电磁伺服单元由外壳（1），由壳体可旋转地支撑的第一轴（8）和第二轴（5）构成，与第二轴同轴地内置在壳体中的电动机（101） 所述电动机具有同轴地安装在所述第二轴上的电枢（10,11），用于检测施加到所述第一和第二轴中的任一个的扭矩的扭矩检测机构（8b,22,16,21,12），以及控制机构 （21,14,15），用于从转矩检测机构接收检测信号，控制起动电动机。 扭矩检测机构配置在壳体内部，第一轴和第二轴通过转矩检测机构相互致动地彼此接合在壳体内。 优选地，第一和第二轴由壳体同轴支撑，并且在其之间具有相对的角位移，当其被显影超过预定角度范围（θ）时，起动电动机。 第一和第二轴适于用作输入端，另一端用作输出轴。

公开(公告)号：US4735271A

公开(公告)日：1988-04-05

申请号：US907

申请日：1987-01-06

申请人： Yasuo Shimizu

发明人： Yasuo Shimizu

IPC分类号： B62D5/04 ,  B62D5/08

CPC分类号： B62D5/0466

摘要： A motor-driven power steering system for vehicles includes a control device which is responsive to output signals from a torque detector mechanism which detects a steering torque acting on an input shaft, for applying a driving signal to an electric motor to produce an assistive torque to be imposed on the output shaft. The power steering system further includes a device for detecting a freely returning state of a steering wheel to produce a motor damping signal and a motor damping device for damping the electric motor in response to the motor damping signal.

摘要翻译： 用于车辆的电动机动力转向系统包括控制装置，该控制装置响应于来自扭矩检测器机构的输出信号，该扭矩检测器机构检测作用在输入轴上的转向转矩，以将驱动信号施加到电动马达以产生辅助转矩 施加在输出轴上。 动力转向系统还包括用于检测方向盘的自由返回状态以产生电动机阻尼信号的装置和用于响应于电动机阻尼信号阻尼电动机的电动机阻尼装置。