公开(公告)号：US5497657A

公开(公告)日：1996-03-12

申请号：US133440

申请日：1993-10-08

申请人： Takeyasu Taguchi ,  Toshiharu Naito ,  Hiromi Tokuda ,  Yuuichi Inoue ,  Shusaku Fujimoto ,  Kenji Fujiwara

发明人： Takeyasu Taguchi ,  Toshiharu Naito ,  Hiromi Tokuda ,  Yuuichi Inoue ,  Shusaku Fujimoto ,  Kenji Fujiwara

IPC分类号： B60C23/06 ,  B60C23/00 ,  B60C23/02

CPC分类号： B60C23/062 ,  B60C23/061

摘要： It is an object of the present invention to detect a tire air pressure indirectly with high detection precision.A tire air pressure detecting device includes a speed sensor for outputting a signal corresponding to a rotational speed of a tire, and an electronic control unit which inputs the signal from the speed sensor and performs predetermined arithmetic operations on that signal. The electronic control unit calculates a wheel speed based on the output signal of the speed sensor, performs a frequency analysis for the calculated vehicle speed, and derives a resonance frequency corresponding to the unsprung mass in the vertical and longitudinal directions. The tire air pressure is then detected based on this resonance frequency.

摘要翻译： 本发明的目的是以高检测精度间接地检测轮胎气压。 轮胎气压检测装置包括用于输出对应于轮胎的转速的信号的速度传感器，以及输入来自速度传感器的信号并对该信号执行预定的算术运算的电子控制单元。 电子控制单元基于速度传感器的输出信号计算车轮速度，对计算出的车速进行频率分析，得到与垂直方向和长度方向的簧下质量对应的共振频率。 然后基于该共振频率检测轮胎空气压力。

公开(公告)号：US06522968B1

公开(公告)日：2003-02-18

申请号：US09694681

申请日：2000-10-24

申请人： Shoji Ito ,  Masaki Yamamoto ,  Takaji Umeno ,  Katsuhiro Asano ,  Yasushi Amano ,  Satoru Onozawa ,  Shusaku Fujimoto

发明人： Shoji Ito ,  Masaki Yamamoto ,  Takaji Umeno ,  Katsuhiro Asano ,  Yasushi Amano ,  Satoru Onozawa ,  Shusaku Fujimoto

IPC分类号： B60T800

CPC分类号： B60T8/172 ,  B60T2210/12

摘要： A device for estimating a road friction state in which a friction state of a wheel with respect to a road surface can be estimated accurately. A bandpass filter extracts, from a wheel speed signal detected by a wheel speed detecting unit, a portion of the wheel speed signal in a predetermined range which includes a torsion resonance point at which a frequency is greater than a low frequency regions. A vibration level computing unit computes a vibration level of the wheel speed signal. A road friction state estimating unit estimates the friction state of the wheel with respect to the road surface on the basis of a vibration level computed by the vibration level computing unit and an estimated value of a road &mgr; slope computed by a &mgr; slope computing unit, and on the basis of a relationship between the two determined for each road surface state.

摘要翻译： 能够准确地估计车轮相对于路面的摩擦状态的道路摩擦状态估计装置。 带通滤波器从由车轮速度检测单元检测的车轮速度信号中提取车轮速度信号的一部分在包括频率大于低频区域的扭转共振点的预定范围内。 振动级计算单元计算车轮速度信号的振动水平。 道路摩擦状态估计单元基于由振动级计算单元计算的振动水平和由μ坡度计算单元计算出的道路μa斜率的估计值来估计车轮相对于路面的摩擦状态， 并且基于对于每个路面状态确定的两者之间的关系。

公开(公告)号：US5541859A

公开(公告)日：1996-07-30

申请号：US215763

申请日：1994-03-22

申请人： Yuuichi Inoue ,  Shusaku Fujimoto ,  Kenji Tomiita ,  Nobuyoshi Onogi

发明人： Yuuichi Inoue ,  Shusaku Fujimoto ,  Kenji Tomiita ,  Nobuyoshi Onogi

IPC分类号： B60C23/06 ,  B60T8/172 ,  G01P3/481 ,  G01P11/00

CPC分类号： B60C23/062 ,  B60C23/061 ,  B60T8/172 ,  G01P3/481 ,  G01P3/489 ,  B60T2210/14

摘要： In a speed detecting apparatus for a rotating body, a correction coefficient is used to correct a detecting error in each of pulse signal periods representing speed data of the rotating body. The correction coefficient is updated so as to cancel an aberration of the corresponding pulse signal period caused by a nonstandard factor of the rotating body. Specifically, an average value of the pulse signal periods corresponding to one rotation of the rotating body is first derived, then a value indicative of a deviation between corresponding one of the pulse signal periods and the average value is derived, and further, an updating value is derived by adjusting a degree of influence of the deviation indicative value to the correction coefficient using a correction sensitivity coefficient. The correction coefficient is updated by adding the updating value to a last value of the correction coefficient.

摘要翻译： 在用于旋转体的速度检测装置中，使用校正系数来校正表示旋转体的速度数据的每个脉冲信号周期中的检测误差。 校正系数被更新以消除由旋转体的非标准因子引起的对应的脉冲信号周期的像差。 具体地，首先导出与旋转体的一次旋转对应的脉冲信号周期的平均值，得出表示相应的一个脉冲信号周期与平均值之间的偏差的值，此外，更新值 通过使用校正灵敏度系数调整偏差指示值对校正系数的影响程度而导出。 通过将更新值添加到校正系数的最后值来更新校正系数。

公开(公告)号：US5010489A

公开(公告)日：1991-04-23

申请号：US332799

申请日：1989-04-03

申请人： Shouichi Masaki ,  Akira Fukushima ,  Shusaku Fujimoto ,  Makoto Nakano

发明人： Shouichi Masaki ,  Akira Fukushima ,  Shusaku Fujimoto ,  Makoto Nakano

IPC分类号： B60T8/66 ,  B60T8/172 ,  B60T8/1764 ,  B60T8/70

CPC分类号： B60T8/1764 ,  B60T8/172

摘要： An anti-skid control system for use in a motor vehicle which includes a braking pressure adjusting device associated in common with at least first and second wheels of the motor vehicle to control braking pressures applied thereto. The anti-skid control system includes first and second wheel speed sensors for sensing rotational speeds of the first and second wheels, respectively, and a vehicle state detector for detecting a state of the motor vehicle such as a speed of the motor vehicle. Also included in the anti-skid control system is a control unit for controlling the braking pressure adjusting device on the basis of the sensed rotational speeds of the first and second wheels and the detected state of the motor vehicle. The control unit determines a weighting coefficient on the basis of the detected vehicle state and calculates a weighted average wheel speed on the basis of the determined weighting coefficient and the sensed rotational speeds. The control unit generates a control signal to the braking pressure adjusting device so that the braking pressure is controlled in accordance with the calculated weighted average wheel speed.

摘要翻译： 一种用于机动车辆的防滑控制系统，其包括与机动车辆的至少第一和第二轮共同相关联的制动压力调节装置，以控制施加到其上的制动压力。 防滑控制系统包括用于分别检测第一和第二车轮的转速的第一和第二车轮速度传感器，以及用于检测机动车辆的状态（例如机动车辆的速度）的车辆状态检测器。 防滑控制系统中还包括控制单元，用于根据感测到的第一和第二车轮的转速和机动车辆的检测状态来控制制动压力调节装置。 控制单元基于检测到的车辆状态来确定加权系数，并且基于所确定的加权系数和感测的转速来计算加权平均车轮速度。 控制单元向制动压力调节装置产生控制信号，使得根据计算的加权平均车轮速度来控制制动压力。

公开(公告)号：US5012417A

公开(公告)日：1991-04-30

申请号：US319202

申请日：1989-03-06

申请人： Takashi Watanabe ,  Shusaku Fujimoto ,  Kazunori Sakai

发明人： Takashi Watanabe ,  Shusaku Fujimoto ,  Kazunori Sakai

IPC分类号： B60T8/72 ,  B60T8/173 ,  B60T8/175 ,  B60T8/1761

CPC分类号： B60T8/17616 ,  B60T8/173 ,  B60T8/175

摘要： An apparatus for controlling running of a motor vehicle by measuring respective values of acceleration of the vehicle wheels, includes a digital low-pass filter for obtaining acceleration values by excluding high-frequency noise components of successive values of instantaneous acceleration which are obtained for each wheel at successive sampling intervals. Filter parameters such as the cut-off frequency can be controlled in accordance with the current operating conditions of the respective wheels, such as wheel velocity, to thereby provide optimum filter operation and hence substantially improved accuracy for the derived values of acceleration.

摘要翻译： 一种用于通过测量车轮的加速度的相应值来控制机动车辆的运行的装置包括数字低通滤波器，用于通过排除为每个车轮获得的连续的瞬时加速值的高频噪声分量来获得加速度值 在连续采样间隔。 可以根据各个车轮的当前操作条件（例如车轮速度）来控制诸如截止频率的过滤器参数，从而提供最佳的过滤器操作，并因此提供推导的加速度值的显着提高的精度。