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1. 发明授权

US4875541A Electric power steering system 失效
标题翻译：电动助力转向系统
公开(公告)号：US4875541A
公开(公告)日：1989-10-24
申请号：US203286
申请日：1988-06-06
申请人： Saiichiro Oshita , Toyohiko Mouri , Tsutomu Takahashi , Shinji Itou
发明人： Saiichiro Oshita , Toyohiko Mouri , Tsutomu Takahashi , Shinji Itou
IPC分类号： B62D6/02 , B62D5/04 , H02P29/00
CPC分类号： B62D5/0463
摘要： A system having a motor operatively connected to a steering system for reducing the steering effort. The system is provided with a torsion torque sensor provided for detecting torsion torque generating in the steering system in steering operation. In response to the output signal of the torsion torque sensor, an assist signal is produced. The system has a dead zone for the output signal of the torsion torque sensor. Only when the output signal exceeds the dead zone, the assist signal is produced to operate the motor.
摘要翻译：一种具有可操作地连接到转向系统以减少转向力的马达的系统。该系统设置有用于在转向操作中检测转向系统中的扭转扭矩产生的扭矩传感器。响应于扭矩传感器的输出信号，产生辅助信号。该系统具有用于扭力传感器的输出信号的死区。只有当输出信号超过死区时，才产生辅助信号来操作电机。

2. 发明授权

US4834203A Electric power steering system 失效
标题翻译：电动助力转向系统
公开(公告)号：US4834203A
公开(公告)日：1989-05-30
申请号：US213111
申请日：1988-06-29
申请人： Tsutomu Takahashi , Shinji Itou , Saiichiro Oshita , Toyohiko Mouri
发明人： Tsutomu Takahashi , Shinji Itou , Saiichiro Oshita , Toyohiko Mouri
IPC分类号： B62D5/04 , B62D6/00 , B62D6/02 , B62D101/00 , B62D111/00 , B62D119/00
CPC分类号： B62D5/0466
摘要： An electric power steering system has a torsion torque sensor provided for detecting torsion torque generating in a steering system of a motor vehicle, for providing an assist signal for driving a motor to turn a steering wheel. A steering angle sensor is provided for detecting steering angle of the steering wheel and for producing a steering angle signal. In response to the steering angle signal, a return torque signal is produced for steering wheel. A vehicle speed sensor is provided for producing a vehicle speed signal dependent on speed of the vehicle, and a calculator is provided calculating lateral acceleration impared to the vehicle and for producing a lateral-acceleration-dependent-return torque signal. In accordance with the vehicle speed signal, the lateral-acceleration-dependent-return torque signal is corrected to produce return torque correcting signal, the absolute value of which reduces with increase of vehicle speed. The return torque correcting signal is added to the return torque signal for correcting the latter signal.
摘要翻译：电动助力转向系统具有用于检测在机动车辆的转向系统中产生的扭矩的扭矩传感器，用于提供用于驱动电动机以转动方向盘的辅助信号。提供用于检测方向盘的转向角并产生转向角信号的转向角传感器。响应于转向角信号，产生用于方向盘的返回转矩信号。提供了一种用于产生取决于车辆速度的车速信号的车速传感器，并且提供计算器，其计算向车辆施加的横向加速度并产生横向加速度相关返回扭矩信号。根据车速信号，对横向加速度相关返回扭矩信号进行校正，以产生返回扭矩校正信号，其绝对值随着车速的增加而减小。返回扭矩校正信号被添加到用于校正后一信号的返回转矩信号。

3. 发明授权

US5065324A Method of detecting absolute steering angle of steering angle sensor for vehicle 失效
标题翻译：检测车辆转向角传感器绝对转向角的方法
公开(公告)号：US5065324A
公开(公告)日：1991-11-12
申请号：US494541
申请日：1990-03-16
申请人： Saiichiro Oshita , Toyohiko Mouri , Tsutomu Takahashi
发明人： Saiichiro Oshita , Toyohiko Mouri , Tsutomu Takahashi
IPC分类号： G01B21/22 , B62D1/00 , B62D15/02 , G01D5/36
CPC分类号： B62D15/02 , G01D5/36
摘要： A method for detecting an absolute steering angle of a steering angle sensor such as encoder for a vehicle wherein the steering angle sensor generates an output signal indicating a relative rotation angle of a steering shaft of the vehicle and at least one reference signal representing a reference position for every one rotation of the steering shaft. The method comprises the steps of setting a deviation .DELTA..theta. between the reference position and an actual straight-ahead driving state position responsive to the output signal and the reference signal, storing the deviation .DELTA..theta. in a memory of a computer which holds the deviation .DELTA..theta. while the computer is disconnected from a battery, determining a steering angle with the reference position responsive to the output signal and the reference signal, and correcting by the deviation .DELTA..theta. the steering angle to obtain the absolute steering angle.
摘要翻译：一种用于检测诸如车辆编码器的转向角传感器的绝对转向角的方法，其中转向角传感器产生指示车辆的转向轴的相对旋转角度的输出信号和表示参考位置的至少一个参考信号对于转向轴的每一个旋转。该方法包括以下步骤：响应于输出信号和参考信号，将基准位置和实际直行驱动状态位置之间的偏差DELTAθ设置在存储偏差DELTAθ的计算机的存储器中 θ，同时计算机与电池断开，响应于输出信号和参考信号确定与参考位置的转向角，并且通过偏差DELTAθ校正转向角以获得绝对转向角。

4. 发明授权

US5021721A Electric power steering system for a motor vehicle 失效
标题翻译：机动车电动助力转向系统
公开(公告)号：US5021721A
公开(公告)日：1991-06-04
申请号：US441261
申请日：1989-11-27
申请人： Saiichiro Oshita , Toyohiko Mouri , Tsutomu Takahashi
发明人： Saiichiro Oshita , Toyohiko Mouri , Tsutomu Takahashi
IPC分类号： B62D6/00 , B62D5/04
CPC分类号： B62D5/0406
摘要： An electric power steering system for an automobile which includes a steering shaft having a steering torque transmitting shaft. The electric power steering system includes a housing mounted on the steering torque transmitting shaft, a torsion torque sensor, in the housing, for detecting a torsion torque in the steering shaft during a steering operation to generate a torsion torque signal representing the detected torsion torque, and a controlling unit for providing a drive signal, in response to the torsion torque signal, to control an electric motor, mounted to the housing and operatively connected to the steering torque transmitting shaft, for reducing a steering effort. The controlling unit is integrally mounted to the housing.
摘要翻译：一种用于汽车的电动助力转向系统，其包括具有转向扭矩传递轴的转向轴。电动助力转向系统包括安装在转向扭矩传递轴上的壳体，壳体中的扭矩传感器，用于在转向操作期间检测转向轴中的扭矩，以产生表示检测到的扭矩的扭转扭矩信号，以及控制单元，用于响应于扭转扭矩信号提供驱动信号，以控制安装到壳体并可操作地连接到转向扭矩传递轴的电动机，以减少转向力。控制单元一体地安装到壳体。

5. 发明授权

US5053966A Motor control apparatus for electric power steering system of a motor vehicle 失效
标题翻译：电动汽车电力转向系统的电机控制装置
公开(公告)号：US5053966A
公开(公告)日：1991-10-01
申请号：US649146
申请日：1991-02-01
申请人： Tsutomu Takahashi , Shinji Ito , Saiichiro Oshita , Toyohiko Mouri
发明人： Tsutomu Takahashi , Shinji Ito , Saiichiro Oshita , Toyohiko Mouri
IPC分类号： B62D5/04
CPC分类号： B62D5/0466 , B62D5/0463
摘要： A motor control apparatus for an electric power steering system having a torsion torque sensor for detecting a torsion torque of the steering system of a vehicle, a command signal generating unit for generating a command signal in accordance with the torsion torque detected by the torque sensor, and a motor control unit for driving and controlling a motor of the electric power steering system in accordance with the command signal. The improvement of this invention is to assist steering force within the steering wheel correcting range. A steering speed detecting unit is provided for detecting the steering speed. The output signal from the steering speed range detecting unit is supplied to the steering wheel correction command unit which generates an assist correction signal. The assist correction signal has a characteristic that the absolute value thereof takes a predetermined value when a small steering angle range is detected. The output from the steering wheel correction command unit is supplied to the motor control unit to regulate the command signal. Such regulation may be effected so as to decrease the command signal as the vehicle speed increases. Alternatively, the command signal may be regulated in accordance with the correction factor signal.
摘要翻译：一种用于电动助力转向系统的电动机控制装置，具有用于检测车辆的转向系统的扭矩的扭矩传感器，用于根据由转矩传感器检测出的扭矩产生指令信号的指令信号生成部，以及用于根据命令信号驱动和控制电动转向系统的电动机的电动机控制单元。本发明的改进在于辅助方向盘校正范围内的转向力。提供用于检测转向速度的转向速度检测单元。来自转向速度范围检测单元的输出信号被提供给产生辅助校正信号的方向盘校正命令单元。当检测到小的转向角范围时，辅助校正信号具有其绝对值取预定值的特性。来自方向盘校正命令单元的输出被提供给马达控制单元以调节命令信号。可以进行这种调节，以便随着车速的增加而减小指令信号。或者，可以根据校正因子信号来调节命令信号。

6. 发明授权

US4979114A Motor control apparatus for electric power steering system 失效
标题翻译：电动助力转向系统电机控制装置
公开(公告)号：US4979114A
公开(公告)日：1990-12-18
申请号：US341043
申请日：1989-04-20
申请人： Saiichiro Oshita , Toyohiko Mouri , Tsutomu Takahashi
发明人： Saiichiro Oshita , Toyohiko Mouri , Tsutomu Takahashi
IPC分类号： B62D5/04
CPC分类号： B62D5/0466
摘要： A motor control apparatus for an electric power steering system of a vehicle is provided. The apparatus includes a torsion torque sensor for detecting a torsion torque of the steering system, a vehicle speed sensor, a steering angle sensor, a control unit for controlling the rotational direction and torque of an electric motor in accordance with a command signal derived from the outputs from the torque sensor, vehicle speed sensor and steering angle sensor, and a neutral position recovery command unit for generating a recovery signal in response to which the steering system is returned to a neutral position, in accordance with an output signal from the steering angle sensor and when the absolute values of the output signals from the torsion torque sensor and vehicle speed sensor becomes smaller than or equal to predetermined values. The neutral position recovery command unit operates such that the recovery signal functions to make a recovery steering angle speed gradually decreases toward 0 as the steering system is returned to the neutral position while following a predetermined target steering speed. The neutral position recovery command unit also operates such that the recovery signal functions to gradually move the recovery target value toward 0.
摘要翻译：提供一种用于车辆的电动助力转向系统的电动机控制装置。该装置包括用于检测转向系统的扭转扭矩的扭矩传感器，车速传感器，转向角传感器，用于根据来自所述转向系统的指令信号来控制电动机的旋转方向和转矩的控制单元来自扭矩传感器，车速传感器和转向角传感器的输出以及中立位置恢复指令单元，用于根据来自转向角的输出信号产生响应于该转向系统返回到中立位置的恢复信号并且当来自扭矩传感器和车速传感器的输出信号的绝对值变得小于或等于预定值时。中立位置恢复指令单元进行操作，使得恢复信号起作用以使得恢复转向角速度随着转向系统返回到中立位置而按照预定的目标转向速度朝着0逐渐减小。中立位置恢复命令单元也操作使得恢复信号用于逐渐将恢复目标值向0移动。

7. 发明授权

US5182711A Motor control system for electric power steering apparatus 失效
标题翻译：电动助力转向装置电机控制系统
公开(公告)号：US5182711A
公开(公告)日：1993-01-26
申请号：US651058
申请日：1991-02-05
申请人： Tsutomu Takahashi , Saiichiro Oshita , Toyohiko Mouri
发明人： Tsutomu Takahashi , Saiichiro Oshita , Toyohiko Mouri
IPC分类号： B62D5/04
CPC分类号： B62D5/0463
摘要： A motor control system controls a steering apparatus with an electric motor. A command signal is generated in accordance with a torsion torque of the steering apparatus and the rotational direction and torque of the electric motor is controlled in accordance with the command signal. The system includes a vehicle speed sensor, a hysteresis circuit for changing a hysteresis width in accordance with an output from the vehicle speed sensor, and a phase compensation designating section responsive to an output from the torsion torque sensor supplied via the hysteresis circuit for outputting a command signal corresponding to a change rate of the torsion torque, so that the rotation direction and torque of the electric motor is controlled in accordance with the command signal. The hysteresis circuit makes large the hysteresis width during a high speed running of a vehicle to avoid influence of external disturbance due to vibrations from roads.
摘要翻译：电动机控制系统用电动机控制转向装置。根据转向装置的扭矩产生指令信号，根据指令信号控制电动机的旋转方向和转矩。该系统包括车速传感器，用于根据车速传感器的输出改变滞后宽度的滞后电路，以及响应于经由滞后电路提供的扭矩传感器的输出的相位补偿指定部分，用于输出对应于扭矩的变化率的指令信号，使得根据命令信号控制电动机的旋转方向和转矩。滞后电路在车辆的高速行驶期间使滞后宽度变大，以避免由于道路振动引起的外部干扰的影响。

8. 发明授权

US4909343A Electric power steering system 失效
标题翻译：电动助力转向系统
公开(公告)号：US4909343A
公开(公告)日：1990-03-20
申请号：US321220
申请日：1989-03-09
申请人： Toyohiko Mouri , Saiichiro Oshita , Tsutomu Takahashi , Mitsunori Ishii
发明人： Toyohiko Mouri , Saiichiro Oshita , Tsutomu Takahashi , Mitsunori Ishii
IPC分类号： B62D5/06 , B62D5/04 , B62D6/02
CPC分类号： B62D5/0466
摘要： A hydraulic power steering system is disclosed which has a steering control valve operatively connected to a steering shaft to be actuated by the torsional torque exerted thereon by a steering wheel, and a hydraulic cylinder operated by the control valve for assisting the steering of the vehicle. An electric motor drive unit is coupled to the steering shaft for exerting torque thereto in a direction for returning the steering wheel to a straight ahead position. An electronic control circuit is connected to the motor drive unit for exerting a variable amount of return torque to the steering shaft according to the steering angle of the steering shaft, or to both the steering angle and the travelling speed of the vehicle.
摘要翻译：公开了一种液压动力转向系统，其具有操作性地连接到转向轴的转向控制阀，以通过方向盘施加在其上的扭转扭矩致动，以及由用于辅助车辆转向的控制阀操作的液压缸。电动机驱动单元联接到转向轴，以在使方向盘返回到直线前进位置的方向上施加扭矩。电动控制电路连接到电动机驱动单元，用于根据转向轴的转向角或转向角和行驶速度向转向轴施加可变的返回扭矩。

9. 发明授权

US5020617A Method and apparatus for checking torque sensor in electric power steering system for vehicle 失效
标题翻译：车辆电动助力转向系统中扭矩传感器检测方法及装置
公开(公告)号：US5020617A
公开(公告)日：1991-06-04
申请号：US324672
申请日：1989-03-17
申请人： Saiichiro Oshita , Toyohiko Mouri , Tsutomu Takahashi
发明人： Saiichiro Oshita , Toyohiko Mouri , Tsutomu Takahashi
IPC分类号： B62D5/04 , B62D6/00 , B62D119/00
CPC分类号： B62D5/049
摘要： A method for detecting abnormal condition of a torque sensor in an electric power steering system in which a power of an electric motor assisting steering operation of a vehicle is supplied in response to a torque signal generated from the torque sensor, the method comprising the steps of detecting a condition where the torque signal generated from the torque sensor is substantially equal to zero, detecting another condition wherein the rate of changing steering angle is larger than a predetermined value, while the steering angle is held in an increasing state, and further detecting that the above detected conditions last more than a predetermined period.
摘要翻译：一种用于检测电动助力转向系统中的扭矩传感器的异常状态的方法，所述电动助力转向系统响应于从转矩传感器产生的转矩信号而提供辅助车辆转向操作的电动机的动力，所述方法包括以下步骤：检测从转矩传感器产生的转矩信号基本上等于零的状况，检测转向角度变得比预定值大的另一条件，同时转向角保持在增加状态，并进一步检测到上述检测条件持续超过预定期间。

10. 发明授权

US5019981A Device and method for decreasing power consumption of a steering angle detecting system for vehicle 失效
标题翻译：用于降低车辆转向角检测系统的功耗的装置和方法
公开(公告)号：US5019981A
公开(公告)日：1991-05-28
申请号：US487300
申请日：1990-03-02
申请人： Saiichiro Oshita , Toyohiko Mouri , Tsutomu Takahashi
发明人： Saiichiro Oshita , Toyohiko Mouri , Tsutomu Takahashi
IPC分类号： B62D15/02
CPC分类号： B62D15/02
摘要： There are disclosed a device and method for saving power supply of a steering sensor for a vehicle having a conventional circuit for detecting a steering angle and a supplementary circuit for detecting an amount of steering angle change when an ignition switch is turned off. The conventional circuit comprises a rotary encoder for generating two signals of sine waveform-like having a phase discrepancy of 90 degrees responsive to a rotation of a steering shaft, and a microcomputer for calculating an absolute angle from the sine waveform-like signals. The supplementary circuit comprises a waveform shaping circuit for converting the sine signals into two rectangular wave pulse signals. While the switch is turned on, the circuit continues to detect the absolute angle based on the sine waves. When the switch is turned off, the supplementary circuit counts and hold the change amount of the angle as the pulse signals while the circuit maintains the storage of the last absolute angle. The microcomputer reads numbers of the pulse signals to set the initial absolute angle and to start operation for detecting the absolute angle.
摘要翻译：公开了一种用于节省用于具有用于检测转向角的常规电路的车辆的转向传感器的电源的装置和方法，以及用于在点火开关关闭时检测转向角变化量的辅助电路。常规电路包括旋转编码器，用于响应于转向轴的旋转而产生具有90度相位差的正弦波形的两个信号，以及用于从正弦波形状信号计算绝对角度的微计算机。补充电路包括用于将正弦信号转换成两个矩形波脉冲信号的波形整形电路。当开关打开时，电路基于正弦波继续检测绝对角度。当开关关闭时，补充电路计数并保持角度的变化量作为脉冲信号，同时电路保持最后一个绝对角度的存储。微型计算机读取脉冲信号的数量以设置初始绝对角度并开始用于检测绝对角度的操作。

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