公开(公告)号：US5563790A

公开(公告)日：1996-10-08

申请号：US285106

申请日：1994-08-03

申请人： Shunichi Wada ,  Masanori Takagi

发明人： Shunichi Wada ,  Masanori Takagi

IPC分类号： B62D6/00 ,  B62D5/04 ,  B62D101/00 ,  B62D119/00

CPC分类号： B62D5/0436 ,  B62D5/0478 ,  B62D5/0487

摘要： A power steering system for a motor vehicle comprises a speed sensor 11, a steering torque sensor 12, a current calculating/driving circuit 21 for outputting a motor current command value on the basis of the vehicle speed and the steering torque, an assist torque generating electric motor 10 coupled to the steering system through an electromagnetic clutch 9, a clutch control circuit 50 for controlling a coupling effort of the electromagnetic clutch, an abnormal torque decision calculating circuit 31 for arithmetically determining an abnormal torque and a vehicle speed corresponding to the abnormal torque for a predetermined reference temporal duration to thereby output both an abnormal torque decision value indicating an abnormal torque corresponding to the vehicle speed detected by the vehicle speed sensor and the reference temporal duration, a load torque arithmetic circuit 33 for arithmetically determining both a load torque value indicating a sum of the steering torque detected by the steering torque sensor and an assist torque generated by the electric motor and a temporal duration of the load torque value, a torque comparison circuit 35 for comparing the load torque value with the abnormal torque decision reference value and comparing the temporal duration of the load torque value with the reference temporal duration, and a motor fault monitor/control circuit 40 responsive to results of the comparisons indicating that the load torque value is greater than the abnormal torque decision value and that the temporal duration of the load torque value is not shorter than the reference temporal duration, to thereby control the clutch control circuit so that the coupling effort of the electromagnetic clutch is lowered in a continuous manner to a predetermined coupling effort which permits manual steering.

摘要翻译： 用于机动车辆的动力转向系统包括速度传感器11，转向转矩传感器12，用于基于车速和转向转矩输出电动机电流指令值的电流计算/驱动电路21，产生辅助转矩的辅助转矩 通过电磁离合器9联接到转向系统的电动机10，用于控制电磁离合器的耦合力的离合器控制电路50，用于算术地确定异常转矩的异常转矩判定计算电路31和对应于异常的车速 从而输出指示与车速传感器检测到的车速相对应的异常转矩的异常转矩判定值和基准时间持续时间的负载转矩运算电路33，用于对负载转矩 表示通过检测的转向转矩的和的值 转向转矩传感器和由电动机产生的辅助转矩和负载转矩值的持续时间;扭矩比较电路35，用于将负载转矩值与异常转矩判定基准值进行比较，并比较负载转矩的时间持续时间 具有参考时间持续时间的值，以及响应于比较结果的电动机故障监视/控制电路40，其指示负载转矩值大于异常转矩判定值，并且负载转矩值的时间持续时间不短于 参考时间持续时间，从而控制离合器控制电路，使得电磁离合器的耦合力以连续的方式降低到允许手动转向的预定联接力。

公开(公告)号：US5414627A

公开(公告)日：1995-05-09

申请号：US103914

申请日：1993-08-10

申请人： Shunichi Wada ,  Kazuhisa Nisino ,  Yasushi Sasaki

发明人： Shunichi Wada ,  Kazuhisa Nisino ,  Yasushi Sasaki

IPC分类号： B62D5/04 ,  B62D6/00 ,  B62D6/02 ,  B62D101/00 ,  B62D119/00

CPC分类号： B62D5/0478 ,  B62D5/0463

摘要： An electric power steering control device includes a motor controller for controlling an electric motor providing the assisting steering torque; and a clutch controller for controlling an electromagnetic clutch selectively connecting the assisting steering torque of the motor to the steering system. The degree of engagement (connection) of the clutch corresponds to the clutch current command level I.sub.C. When the vehicle speed is above a predetermined speed V.sub.0 (i.e., during high speed driving), the clutch current I.sub.C is set at a predetermined half current level I.sub.CR. During low vehicle speeds below V.sub.0, the clutch current I.sub.C is gradually decreased to the half current level I.sub.CR as the vehicle speed increases to V.sub.0. When the steering torque T is above a first predetermined level T1 indicative of an abnormality during high speed operation, the clutch current I.sub.C is set at a minimal level I.sub.CO. The steering torque T is returned to the half current level I.sub.CR when it is below a second predetermined level T2 smaller than the first level T1, thereby avoiding steering torque hunting.

摘要翻译： 电动助力转向控制装置包括：电动机控制器，用于控制提供辅助转向转矩的电动机; 以及用于控制电磁离合器的离合器控制器，其选择性地将马达的辅助转向扭矩连接到转向系统。 离合器的接合度（连接）对应于离合器电流指令级IC。 当车速超过预定速度V0（即，在高速行驶期间）时，将离合器电流IC设定为预定的半电流水平ICR。 在低于V0的低车速下，当车速增加到V0时，离合器电流IC逐渐降低到半电流水平ICR。 当转向转矩T高于表示高速运转时的异常的第一规定电平T1时，将离合器电流IC设定为最低电平ICO。 当转向转矩T低于小于第一电平T1的第二预定电平T2时，转向转矩T返回到半电流电平ICR，从而避免了转向转矩的旋转。

公开(公告)号：US5404960A

公开(公告)日：1995-04-11

申请号：US187340

申请日：1994-01-25

申请人： Shunichi Wada ,  Kazuhisa Nishino

发明人： Shunichi Wada ,  Kazuhisa Nishino

IPC分类号： B62D5/04 ,  B62D6/02

CPC分类号： B62D5/0466

摘要： A motor-driven type power steering apparatus for assisting a driver in manipulating a steering wheel of a motor vehicle includes a steering-wheel return state decision circuit for deciding whether the steering wheel is in the state to be returned to a center position, a control quantity generating and selecting circuit for generating control quantities corresponding to respective driving modes on the basis of a control quantity of the electric motor and selecting one of the control quantities in dependence on the result of the decision made as to the return state of the steering wheel, and a conversion circuit for converting the control quantities into PWM duty ratios, respectively. In the normal steering operation, switching elements for energizing the motor are driven with the PWM duty ratio corresponding to a first driving mode, while upon return of the steering wheel to the center position, the switching elements are driven with the PWM duty ratio corresponding to a second driving mode. A smooth steering torque control is realized with the steering-wheel return characteristic being improved.

摘要翻译： 用于辅助驾驶员操纵机动车辆的方向盘的电动机型动力转向装置包括用于判定方向盘是否处于返回到中心位置的状态的方向盘返回状态判定电路，控制 数量产生和选择电路，用于基于电动机的控制量产生对应于各个驱动模式的控制量，并且根据关于方向盘的返回状态的决定结果选择一个控制量 ，以及分别将控制量转换成PWM占空比的转换电路。 在正常转向操作中，用于对电动机通电的开关元件以对应于第一驱动模式的PWM占空比来驱动，而当方向盘返回到中心位置时，开关元件以对应于 第二种驾驶模式。 通过提高方向盘返回特性实现平稳的转向转矩控制。

公开(公告)号：US5387005A

公开(公告)日：1995-02-07

申请号：US141201

申请日：1993-10-26

申请人： Kenji Hayase ,  Shunichi Wada ,  Shigeki Ohtagaki ,  Yoshihiro Tsuda

发明人： Kenji Hayase ,  Shunichi Wada ,  Shigeki Ohtagaki ,  Yoshihiro Tsuda

IPC分类号： B60G17/015 ,  B60G17/018 ,  F16F9/50 ,  G05D19/02 ,  B60G17/08

CPC分类号： B60G17/018 ,  B60G2202/41 ,  B60G2400/25 ,  B60G2400/91 ,  B60G2500/30 ,  B60G2600/02 ,  B60G2600/85

摘要： A suspension control system having a suspension unit between a wheel and a body of a vehicle, a fluid supply device for supplying a fluid to the suspension unit, a fluid discharge device for discharging the fluid from the suspension unit, an amplitude measurement device for measuring the amplitude of vertical vibrations of the vehicle body, a threshold value setting device for setting a threshold value of the amplitude of vertical vibrations, a controller for cancelling expansion and contraction of the suspension unit by controlling the fluid supply and the fluid devices when the amplitude of vertical vibrations is equal to or larger than the threshold value, a counter for counting the number of times the fluid supply and fluid discharge devices are controlled by the controller in a predetermined time period, and a threshold value changing device for setting, when the number of times counted by the counter is equal to or larger than a reference number, the threshold value in the threshold value setting device to a value equal to or smaller than an upper limit but larger than a value to which the threshold value was set at a preceding time, and for setting the threshold value to a value equal to or larger than a lower limit but smaller than the value at the preceding time, when the counted number of times is smaller than the reference number.

摘要翻译： 一种悬架控制系统，具有车轮与车体之间的悬挂单元，用于向悬架单元供给流体的流体供给装置，用于从悬架单元排出流体的流体排出装置，用于测量 车体的垂直振动的振幅，用于设定垂直振动幅度的阈值的阈值设定装置，通过控制流体供给和流体装置的振幅来抑制悬架单元的膨胀和收缩的控制器 的垂直振动等于或大于阈值，用于计数在预定时间段内由控制器控制流体供给和流体排出装置的次数的计数器和用于设定的阈值改变装置， 由计数器计数的次数等于或大于参考数，阈值在阈值中 旧值设定装置设定为等于或小于上限但是大于阈值设定在前一时刻的值的值，并且将阈值设置为等于或大于下限值但是 小于上述时间的值，当计数次数小于参考号时。

公开(公告)号：US5341891A

公开(公告)日：1994-08-30

申请号：US946598

申请日：1992-09-18

申请人： Shunichi Wada ,  Tadayuki Hara ,  Yasuo Naito ,  Shinichi Kohge ,  Kazuhisa Nishino

发明人： Shunichi Wada ,  Tadayuki Hara ,  Yasuo Naito ,  Shinichi Kohge ,  Kazuhisa Nishino

IPC分类号： B62D6/02 ,  B62D5/04 ,  B62D5/00

CPC分类号： B62D5/0478

摘要： A motor-driven power steering apparatus and method for a vehicle are able to avoid frequent on-off operations of an electromagnetic clutch 14 as much as possible, which connects or disconnects a motor 13 with or from a steering system, thus improving the durability of the clutch 14 and suppressing the generation of undesirable noise and shocks upon connection and disconnection of the clutch 14. A clutch controller 191 controls a clutch current Ic supplied to the clutch 14 based on the vehicle speed V in such a manner that it sets the clutch current Ic to a first predetermined clutch current level I(V) so as to place the clutch into a substantially engaged state when the vehicle speed V is less than a first predetermined vehicle speed Vo, and to a second predetermined clutch current level Icr which is less than the first predetermined clutch current level I(V) so as to place the clutch into a partially engaged state when the vehicle speed V is equal to or greater than the first predetermined vehicle speed Vo. Preferably, the clutch current Ic is set to a third predetermined clutch current level Ico which is less than the second predetermined clutch current level Icr so as to substantially disengage said electromagnetic clutch when a steering torque T is equal to or greater than a predetermined value To when the vehicle speed is equal to or greater than the first predetermined value Vo.

摘要翻译： 一种用于车辆的马达驱动的动力转向装置和方法能够尽可能地避免电磁离合器14的频繁的断开操作，其将马达13与转向系统连接或断开，从而提高了电动离合器14的耐久性 离合器14，并且抑制在离合器14的连接和断开时产生不期望的噪音和冲击。离合器控制器191基于车速V 1控制提供给离合器14的离合器电流Ic，使得它将离合器 电流Ic到第一预定离合器电流水平I（V），以便当车速V小于第一预定车速Vo时将离合器置于基本接合状态，并将第二预定离合器电流水平Icr设置为 小于第一预定离合器电流水平I（V），以便当车速V等于或大于第一预定值时将离合器置于部分接合状态 开采车速Vo。 优选地，离合器电流Ic被设定为小于第二预定离合器电流水平Icr的第三预定离合器电流水平Ico，以便当转向转矩T等于或大于预定值To时，基本上使所述电磁离合器脱离 当车速等于或大于第一预定值Vo时。

公开(公告)号：US5095751A

公开(公告)日：1992-03-17

申请号：US455015

申请日：1989-12-22

申请人： Shunichi Wada ,  Masayuki Yano

发明人： Shunichi Wada ,  Masayuki Yano

IPC分类号： G01P1/00 ,  G01P15/09

CPC分类号： G01P1/006 ,  G01P15/0907 ,  G01N2291/02827

摘要： An acceleration sensor is disclosed which includes a weight, piezoelectric element(s), a charge amplifier, an insulation plate and a conductive casing. The insulation plate fixedly mounts the weight and piezoelectric element(s) and is fixed to the conductive casing which is maintained at the earth potential. Input terminals of the charge amplifier are connected to the output electrodes of the element(s) and a grounding circuit of the amplifier is connected to the conductive casing so that the input terminals of the amplifier are floated from the earth potential.

公开(公告)号：US5088326A

公开(公告)日：1992-02-18

申请号：US526913

申请日：1990-05-22

申请人： Shunichi Wada ,  Masayuki Yano

发明人： Shunichi Wada ,  Masayuki Yano

IPC分类号： G01P1/02 ,  G01P15/09

CPC分类号： G01P15/0907 ,  G01P1/023 ,  G01N2291/02827

摘要： An accelerometer for automobiles is disclosed which is mounted on an electrically insulating plate (i.e., a printed circuit board) accommodated within an electrically conductive casing. The electrical connections from the electrodes of the piezoelectric element to the inputs of the charge amplifier are effected by a wiring pattern formed on the insulating plate. The casing consists of an open box-shaped base and a plate-shaped cover, a packing member being interposed therebetween, wherein an electrical connection between the base and the cover is provided by the fixing screws for fixing the cover to the base. The cover has a central recess in which through-type capacitors for producing hermetically sealed electrical connections through a wall of the casing are accommodated. Further, the charge amplifier comprises a temperature compensating capacitor having a positive temperature coefficient of capacitance which is coupled across the electrodes of the piezoelectric element; thus, the variation of the output voltage due to the change in the ambient temperature is compensated for by the capacitor and hence is reduced.

摘要翻译： 公开了一种用于汽车的加速度计，其安装在容纳在导电壳体内的电绝缘板（即，印刷电路板）上。 从压电元件的电极到电荷放大器的输入的电连接由形成在绝缘板上的布线图案来实现。 壳体由开放的箱形基座和板状盖子组成，其间插入有密封构件，其中通过用于将盖子固定到基座的固定螺钉提供基座和盖子之间的电连接。 盖具有中心凹部，其中容纳用于通过壳体的壁产生气密密封的电连接的通过型电容器。 此外，电荷放大器包括温度补偿电容器，其具有耦合在压电元件的电极两端的正电温度系数; 因此，由于环境温度的变化引起的输出电压的变化由电容器补偿，因此减小。

公开(公告)号：US5060157A

公开(公告)日：1991-10-22

申请号：US507323

申请日：1990-04-10

申请人： Masahiro Tado ,  Hiroshi Satoh ,  Noriyuki Inoue ,  Yoshihiko Utsui ,  Shunichi Wada

发明人： Masahiro Tado ,  Hiroshi Satoh ,  Noriyuki Inoue ,  Yoshihiko Utsui ,  Shunichi Wada

IPC分类号： B60G17/015 ,  B60G17/016 ,  B60G17/018

CPC分类号： B60G17/0182 ,  B60G17/0162 ,  B60G2400/102 ,  B60G2400/106 ,  B60G2400/204 ,  B60G2400/33 ,  B60G2400/41 ,  B60G2400/91 ,  B60G2500/102 ,  B60G2600/60 ,  B60G2600/90 ,  Y10S706/90

摘要： A shock absorber control apparatus which performs a fuzzy inference by use of a predetermined fuzzy rule regarding comfortable ride, steering stability and grounding efficiency corresponding to a detected running condition of a vehicle, thereby setting an optimum damping force. A shock absorber control apparatus which fetches a plurality of specified frequency components from a vertical acceleration signal of a vehicle body so as to perform a fuzzy inference by use of a fuzzy rule corresponding to a quantity of each frequency component, thereby setting an optimum damping force.

摘要翻译： 一种减震器控制装置，其通过使用与车辆的检测到的行驶状态对应的舒适乘坐，操纵稳定性和接地效率的预定模糊规则执行模糊推理，从而设定最佳阻尼力。 一种减震器控制装置，其从车体的垂直加速度信号中取出多个规定的频率成分，通过使用与各频率成分的量对应的模糊规则进行模糊推定，从而设定最佳的阻尼力 。

公开(公告)号：US5004080A

公开(公告)日：1991-04-02

申请号：US506419

申请日：1990-04-09

申请人： Shunichi Wada

发明人： Shunichi Wada

IPC分类号： H02P8/14 ,  B60G17/08 ,  F16F9/46

CPC分类号： F16F9/462 ,  B60G17/08

摘要： A controlling circuit for an actuator which is provided with a change-over switch for selecting a desired rotational position of a rotating shaft of the actuator, exciting circuit forming device for selectively magnetizing a plurality of electro-magnets in order to control rotation of the rotating shaft to be in a selected desired rotational position in response to an outputted change-over signal, and electrifying switching device for supplying electricity to the electro-magnets only for a predetermined duration from the time when selection of the rotational position of the rotating shaft is changed over by the change-over switch, wherein there is no generated any unnecessary heat for the actuator and construction of the circuit can be more simplified.

摘要翻译： 一种用于致动器的控制电路，其设置有用于选择致动器的旋转轴的期望旋转位置的转换开关，用于选择性地磁化多个电磁体的激励电路形成装置，以便控制旋转的旋转 轴响应于输出的转换信号处于选择的期望的旋转位置，并且在从旋转轴的旋转位置的选择的选择时起预定的持续时间内，将用于向电磁体供电的开关装置通电 通过切换开关切换，其中不会产生用于致动器的不必要的热量，并且可以更加简化电路的构造。

公开(公告)号：US4977506A

公开(公告)日：1990-12-11

申请号：US258410

申请日：1988-10-17

申请人： Mitsuhiko Hara ,  Shozo Takizawa ,  Tadao Tanaka ,  Yasutaka Taniguchi ,  Shunichi Wada ,  Shigeki Ohtagaki

发明人： Mitsuhiko Hara ,  Shozo Takizawa ,  Tadao Tanaka ,  Yasutaka Taniguchi ,  Shunichi Wada ,  Shigeki Ohtagaki

IPC分类号： B60G17/00 ,  B60G17/015 ,  B60G17/016 ,  B60G17/019 ,  F16F15/08

CPC分类号： B60G17/016 ,  B60G17/01908 ,  F16F15/08 ,  B60G2204/10 ,  B60G2204/20 ,  B60G2204/41 ,  B60G2400/104 ,  B60G2400/204 ,  B60G2400/252 ,  B60G2400/34 ,  B60G2400/44 ,  B60G2400/50 ,  B60G2400/60 ,  B60G2500/102 ,  B60G2500/203 ,  B60G2600/26 ,  B60G2600/604 ,  B60G2600/66 ,  B60G2600/68

摘要： A suspension control apparatus for an automotive vehicle has a plurality of suspension units which are disposed between each of the wheels of the vehicle and the vehicle body. A plurality of actuators for controlling the characteristics of the suspension units are controlled by a control unit in response to the output of an acceleration sensor. The ground circuit of the acceleration sensor is connected to the ground circuit of the control unit.

摘要翻译： 一种用于机动车辆的悬架控制装置，具有设置在车辆的车轮和车身的车轮之间的多个悬架单元。 响应于加速度传感器的输出，由控制单元控制用于控制悬架单元的特性的多个致动器。 加速度传感器的接地电路连接到控制单元的接地电路。