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公开(公告)号：US5491632A
公开(公告)日：1996-02-13
申请号：US249409
申请日：1994-05-26
申请人： Andrzej M. Pawlak , William C. Lin , David W. Graber , Dennis C. Eckhardt , Scott E. Weiss , Maged Radamis , Thomas A. Perry , John R. Bradley
发明人： Andrzej M. Pawlak , William C. Lin , David W. Graber , Dennis C. Eckhardt , Scott E. Weiss , Maged Radamis , Thomas A. Perry , John R. Bradley
CPC分类号： B62D15/0215 , B62D15/0245
摘要： A rotary encoder capable of detecting angular rotation of a rotating shaft, and identifying its neutral position without the need for multiple encoder wheels. A magnetoresistive sensor is positioned adjacent the periphery of a single multipole magnet ring attached to a steering wheel shaft. The magnet ring comprises alternating N-pole and S-pole magnetic regions along its periphery, the surface of one of the regions containing a demagnetized portion. The sensor produces a sinusoidal signal as the shaft is rotated, responsive to the passage of the magnetic regions, with a period equal to the passage of two successive magnetic regions adjacent the sensor. The angular position of the shaft which aligns the demagnetized portion adjacent the sensor corresponds to the shaft's neutral position. Aligning of the demagnetized portion adjacent the sensor causes a voltage irregularity within the sensor's otherwise sinusoidal output signal, which is detected by a signal processing circuit.
摘要翻译： 一种旋转编码器，能够检测旋转轴的角度旋转，并且识别其中立位置，而不需要多个编码器轮。 磁阻传感器位于附接到方向盘轴的单个多极磁环的周边附近。 磁环包括沿其周边的交替的N极和S极磁区，其中一个区域的表面包含去磁部分。 当轴旋转时，传感器产生正弦信号，响应于磁区的通过，其周期等于与传感器相邻的两个连续磁区的通过。 将去磁部分对准传感器对准的轴的角位置对应于轴的中立位置。 与传感器相邻的去磁部分的对准导致传感器否则正弦输出信号内的电压不规则，其由信号处理电路检测。
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公开(公告)号：US07264080B2
公开(公告)日：2007-09-04
申请号：US11092641
申请日：2005-03-29
CPC分类号： B62D5/0835
摘要： The invention provides a method for controlling valve stiffness in a power steering system. The method includes the step of engaging a pinion and a spool shaft with respect to one another for turning at least two wheels of a vehicle in response to rotation of a steering wheel from an on-center orientation. The method also includes the step of variably assisting movement of the pinion with a hydraulic power steering device having a valve movable between a closed configuration and an open configuration. The method also includes the step of moving the valve from the open configuration to the closed configuration in response to rotation of the spool shaft relative to the pinion from an on-center orientation to assist the pinion in rotation for turning the at least two wheels. The method also includes the step of first disposing a torsion rod having a first stiffness between the pinion and spool shaft to resist rotation of the spool shaft relative to the pinion from the on-center orientation and resist movement of the valve from the open configuration to the closed configuration. The method also includes the step of second disposing a magnetic coupling having a variable second stiffness in parallel with the torsion rod to resist rotation of the spool shaft relative to the pinion from the on-center orientation and resist movement of the valve from the open configuration to the closed configuration. The first stiffness and the variable second stiffness cooperate to define an overall valve stiffness. The method also includes the step of varying the variable second stiffness generated by the magnetic coupling with an electric coil to vary the overall valve stiffness. The method also includes the step of maximizing the variable second stiffness generated by the magnetic coupling when the spool shaft and the pinion are on-center with respect to one another.
摘要翻译： 本发明提供了一种用于控制动力转向系统中的阀刚度的方法。 该方法包括相对于彼此接合小齿轮和卷轴的步骤，以响应于方向盘从中心方位的转动而转动车辆的至少两个车轮。 该方法还包括可变地辅助小齿轮与液压动力转向装置的运动的步骤，该液压动力转向装置具有可在关闭构型和打开构型之间移动的阀。 该方法还包括将阀从打开构型移动到闭合构型的步骤，以响应卷筒轴相对于小齿轮的转动而从中心方向移动，以帮助小齿轮旋转以转动至少两个轮。 该方法还包括以下步骤：首先在小齿轮和卷轴之间设置具有第一刚度的扭杆，以阻止卷筒轴相对于小齿轮从中心取向的旋转，并阻止阀从打开构型移动到 关闭配置。 该方法还包括以下步骤：第二次布置具有与扭杆平行的可变的第二刚度的磁耦合，以抵抗卷轴从相对于小齿轮的中心取向的转动，并阻止阀从打开构型移动 到关闭配置。 第一刚度和可变第二刚度协作以确定整体阀刚度。 该方法还包括通过电线圈改变由磁耦合产生的可变第二刚度以改变整体阀刚度的步骤。 该方法还包括当卷轴和小齿轮相对于彼此在中心时最大化由磁耦合产生的可变第二刚度的步骤。
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公开(公告)号：US07434654B2
公开(公告)日：2008-10-14
申请号：US11846713
申请日：2007-08-29
CPC分类号： B62D5/0835
摘要： A power steering system for a vehicle includes a hydraulic system for controlling resistance of a steering wheel. A valve of the hydraulic system is connected to a coil which varies positioning of the valve. A method for controlling the resistance of the steering wheel includes turning the steerable wheels of the vehicle in response to rotation of the steering wheel. The angle of the steering wheel and the speed of the vehicle are sensed and inputted into a controller. A lateral acceleration is determined based on the sensed signals by the controller. A recommended current rate of the coil is determined based on the lateral acceleration. An adjustment to the recommended current rate of the coil is determined based upon the speed of the vehicle. The recommended current rate is also modified based upon the adjustment. The modified current rate of the coil is then applied to the coil to vary the stiffness of the valve, which in turn varies the resistance to turning the steerable wheels of the vehicle.
摘要翻译： 用于车辆的动力转向系统包括用于控制方向盘的阻力的液压系统。 液压系统的阀连接到线圈上，该线圈改变阀的定位。 用于控制方向盘的阻力的方法包括响应于方向盘的旋转来转动车辆的可转向轮。 方向盘的角度和车辆的速度被感测并输入到控制器中。 基于由控制器感测到的信号确定横向加速度。 基于横向加速度确定线圈的推荐电流速率。 基于车辆的速度来确定线圈的推荐电流速率的调整。 推荐的当前速率也会根据调整进行修改。 然后将线圈的改进的电流速率施加到线圈以改变阀的刚度，这又改变了转向车辆的可转向车轮的阻力。
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公开(公告)号：US06721629B2
公开(公告)日：2004-04-13
申请号：US09966219
申请日：2001-09-28
IPC分类号： G05D312
CPC分类号： B62D7/159 , B60T2250/04 , B60T2260/022 , B62D15/02 , G01B21/26 , G05B9/02
摘要： Disclosed is a method for aligning a position sensor in a vehicle with steerable wheels comprising obtaining an absolute position value responsive to a position signal from a handwheel position sensor, obtaining a relative position value responsive to an encoder signal count from a position encoder, and obtaining an index position value responsive to an index position signal. The method further includes receiving an alignment enable signal and determining a correction factor responsive to the relative position value and the index position value. The method for aligning a position sensor is responsive to at least one of the absolute position value, the relative position value, and the index position value under conditions determined from the status of the alignment enable signal. Also disclosed is a method for aligning a steerable wheel in a vehicle with electric power steering comprising obtaining an alignment correction corresponding to a computed correction of wheel position relative to the vehicle from an alignment apparatus, receiving an alignment enable signal, where the method of aligning is responsive to the alignment correction under conditions determined from the status of the alignment enable signal.
摘要翻译： 公开了一种用于将车辆中的位置传感器与可转向轮对准的方法，包括响应于来自手轮位置传感器的位置信号获得绝对位置值，响应于来自位置编码器的编码器信号计数获得相对位置值，并获得 响应于索引位置信号的索引位置值。 该方法还包括接收对准使能信号并且响应于相对位置值和索引位置值确定校正因子。 用于对准位置传感器的方法响应于从对准使能信号的状态确定的条件下的绝对位置值，相对位置值和索引位置值中的至少一个。 还公开了一种用于将车辆中的可转向车轮对准电动助力转向的方法，其包括从对准装置获得对应于相对于车辆的车轮位置的计算校正的对准校正，接收对准使能信号，其中对准方法 在从对准使能信号的状态确定的条件下响应于对准校正。
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