公开(公告)号：US5039926A

公开(公告)日：1991-08-13

申请号：US591162

申请日：1990-10-01

申请人： Mitsuharu Morishita ,  Shinichi Kohge ,  Kazuhisa Nishino

发明人： Mitsuharu Morishita ,  Shinichi Kohge ,  Kazuhisa Nishino

IPC分类号： B62D6/00 ,  B62D5/04

CPC分类号： B62D5/049

摘要： A motorized power steering apparatus is equipped with a torque sensor including a primary potentiometer for detecting a steering torque applied to the steering wheel by a driver. The torque sensor further includes an auxiliary potentiometer so as to detect variations in the output voltage of a constant voltage power supply to the potentiometers. When there is a difference between the outputs of the primary and auxiliary potentiometers which is greater than a prescribed level, a fail-safe relay is turned off to nullify the power steering operation of a motor. When the output voltage of the power supply for supplying a constant voltage to the primary and auxiliary potentiometers drops below or rises above a predetermined level, the output voltage of the auxiliary potentiometer, which is not used for power steering control, is raised. This increases the difference between the output voltages of the potentiometers to a detectable level, whereby a fail-safe operation is carried out to nullify the power steering operation of the electric motor. Thus, the steering wheel is prevented, in a reliable manner, from being turned spontaneously or unintentionally against the driver's will due to variations in the neutral point of the torque sensor resulting from fluctuations in the voltage supplied thereto.

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：US5040630A

公开(公告)日：1991-08-20

申请号：US293037

申请日：1989-01-03

申请人： Mitsuharu Morishita ,  Kosaku Uota ,  Kazuhisa Nishino

发明人： Mitsuharu Morishita ,  Kosaku Uota ,  Kazuhisa Nishino

IPC分类号： B62D5/04

CPC分类号： B62D5/0469 ,  B62D5/0463

摘要： The power steering system of this invention has a motor which provides auxiliary torque for the steering shaft to assist in steering.The maximum level of the motor current is varied in response to the mean motor current at predetermined intervals of time so as to regulate the maximum motor current and thereby prevent overheating or burning of the motor when, for example, the steering wheel is held for a long time in an extreme position.

公开(公告)号：US06223806B1

公开(公告)日：2001-05-01

申请号：US09520882

申请日：2000-04-05

申请人： Kazuhisa Nishino ,  Eiju Hayakawa

发明人： Kazuhisa Nishino ,  Eiju Hayakawa

IPC分类号： B22C908

CPC分类号： B22C9/08

摘要： A bottom casting apparatus comprises a pouring pipe, a stool, molds, and runners, wherein the runner satisfies the following equations (1) and (2) and a gap formed between a side wall of a groove for a runner provided in the stool and a runner brick is filled with heat resisting granules, A−D≦D(Z/100)+2.5 (mm)  (1) A−D>B−E>0  (2) where, A and B are widths (mm) at an upper portion and a bottom portion of the groove, respectively, D and E are widths (mm) at an upper portion and a bottom portion of the runner brick disposed within the groove, respectively, and Z is a mean coefficient of linear expansion (%) of the runner brick in the temperature range of a room temperature to 1000° C.

摘要翻译： 一种底浇铸设备包括一个浇注管，一个粪便，一个模子和一个浇道，其中流道满足下面的等式（1）和（2），并且在设置在凳子中的流道槽的侧壁和 流道砖填充有耐热颗粒，其中A和B分别是槽的​​上部和底部的宽度（mm），D和E分别是上部和底部的宽度（mm） 分别设置在槽内的流槽砖，Z是在室温至1000℃的温度范围内流道砖的平均线膨胀系数（％）。

公开(公告)号：US5988312A

公开(公告)日：1999-11-23

申请号：US121853

申请日：1998-07-24

申请人： Kazuhisa Nishino ,  Hirohisa Awa ,  Shunichi Wada

发明人： Kazuhisa Nishino ,  Hirohisa Awa ,  Shunichi Wada

IPC分类号： B62D6/00 ,  B62D5/04

CPC分类号： B62D5/0487 ,  B62D5/0463

摘要： A vehicle control apparatus includes a steering torque sensor (1) for sensing a steering torque, a motor (3) for generating a steering assisting force, a CPU (22) for determining a motor drive direction based on at least the steering force and a motor drive direction restricting circuit (25) for restricting the drive direction of the motor (3) determined by the CPU (22) based on a steering force determination level as a motor drive direction determination criterion and the steering force, and the steering force determination level is changeable. With this arrangement, there is provided the vehicle control apparatus with safety and reliability by which the motor can be controlled with redundancy, the steering force determination level does not require such accuracy as to use pinpoint accuracy and further even if an abnormal state is caused in a motor output when a steering wheel is released from a hand and a steering torque exceeding the steering force determination level is generated, the steering force determination level is instantly changed to thereby restrict a motor drive direction so that the self-turn of the steering wheel is prevented.

公开(公告)号：US6070692A

公开(公告)日：2000-06-06

申请号：US397017

申请日：1999-09-15

申请人： Kazuhisa Nishino ,  Yuji Takatsuka ,  Shun-Ichi Wada

发明人： Kazuhisa Nishino ,  Yuji Takatsuka ,  Shun-Ichi Wada

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

CPC分类号： B62D5/0466

摘要： An electric power steering control system in which the steering "feel" is improved, having a steering force detector an electric motor for producing an auxiliary steering force, a motor current detector and a control unit for deciding the motor current value and rotational direction at least in accordance with the detected steering force. The motor current is limited in accordance with the detected steering force and motor current values.

摘要翻译： 一种改进了转向“感觉”的电动助力转向控制系统，具有用于产生辅助转向力的转向力检测器，用于产生辅助转向力的电动机，电动机电流检测器和用于决定电动机电流值和旋转方向的控制单元 根据检测到的转向力。 电动机电流根据检测到的转向力和电动机电流值进行限制。

公开(公告)号：US5988310A

公开(公告)日：1999-11-23

申请号：US162515

申请日：1998-09-29

申请人： Kazuhisa Nishino ,  Yuji Takatsuka ,  Shun-Ichi Wada

发明人： Kazuhisa Nishino ,  Yuji Takatsuka ,  Shun-Ichi Wada

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

CPC分类号： B62D5/0466

摘要： An electric power steering control system in which the steering "feel" is improved, having a steering force detector an electric motor for producing an auxiliary steering force, a motor current detector and a control unit for deciding the motor current value and rotational direction at least in accordance with the detected steering force. The motor current is limited in accordance with the detected steering force and motor current values.

公开(公告)号：US5839537A

公开(公告)日：1998-11-24

申请号：US532014

申请日：1995-09-21

申请人： Kazuhisa Nishino ,  Yuji Takatsuka ,  Shun-Ichi Wada

发明人： Kazuhisa Nishino ,  Yuji Takatsuka ,  Shun-Ichi Wada

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

CPC分类号： B62D5/0466

摘要： An electric power steering control system in which the steering "feel" is improved, having a steering force detector an electric motor for producing an auxiliary steering force, a motor current detector and a control unit for deciding the motor current value and rotational direction at least in accordance with the detected steering force. The motor current is limited in accordance with the detected steering force and motor current values.

公开(公告)号：US5698956A

公开(公告)日：1997-12-16

申请号：US582532

申请日：1996-01-03

申请人： Kazuhisa Nishino ,  Hirohisa Awa

发明人： Kazuhisa Nishino ,  Hirohisa Awa

IPC分类号： B62D6/00 ,  B62D5/04

CPC分类号： B62D5/0463

摘要： A control system for an electrically operated power steering apparatus which is capable of eliminating an incongruous steering sensation and improving the converging performance of a steering wheel. The control system comprises a steering torque detecting unit 20 for detecting a steering torque applied to a steering system, a motor 10 coupled to the steering system, and a control unit for controlling the motor 10 using an output of the steering torque detecting unit 20 phase-compensated on the basis of a speed of the motor 10. The control unit includes a target current determining section 25 for determining a target current to the motor 10 on the basis of the output of the steering torque detecting unit 20 and a phase compensating section 21 for obtaining a phase compensation value on the basis of the output of the steering torque detecting unit 20 and the speed of the motor 10. The target current is corrected by the phase compensation value.

摘要翻译： 一种用于电动动力转向装置的控制系统，其能够消除不协调的转向感和改善方向盘的会聚性能。 控制系统包括用于检测施加到转向系统的转向转矩的转向转矩检测单元20，与转向系统相连的电动机10，以及控制单元，用于使用转向转矩检测单元20相的输出来控制电动机10 - 基于电动机10的速度补偿。控制单元包括目标电流确定部25，用于基于转向转矩检测单元20的输出和相位补偿部确定到电动机10的目标电流 21，用于基于转向转矩检测单元20的输出和电动机10的速度获得相位补偿值。通过相位补偿值来校正目标电流。

公开(公告)号：US5659472A

公开(公告)日：1997-08-19

申请号：US519940

申请日：1995-08-28

申请人： Kazuhisa Nishino ,  Hirohisa Awa ,  Shunichi Wada

发明人： Kazuhisa Nishino ,  Hirohisa Awa ,  Shunichi Wada

IPC分类号： B62D6/00 ,  B62D5/04 ,  H02P29/00 ,  B60K41/00

CPC分类号： B62D5/0487

摘要： [Object] To improve system reliability and safety. [Constitution] The rotation speed of the motor 6 is detected by the motor rotation speed detection circuit 17 and the amount of rotation of the motor 6 is calculated from the detected rotation speed by the motor rotation amount calculating means 10a. Then, a fault is determined when the amount of rotation exceeds a predetermined value and the drive of the motor 6 is stopped by the motor stopping means 123.

摘要翻译： [对象]提高系统的可靠性和安全性。 [结构]电动机转速检测电路17检测电动机6的转速，根据电动机旋转量计算装置10a的检测转速计算电动机6的转速。 然后，当旋转量超过预定值并且马达6的驱动被马达停止装置123停止时确定故障。