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1. 发明授权

US5040630A Power steering system of motor drive type 失效
标题翻译：电机驱动型动力转向系统
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.

2. 发明授权

US4947949A Motor-driven type power assisted steering control apparatus 失效
标题翻译：电动式助力转向控制装置
公开(公告)号：US4947949A
公开(公告)日：1990-08-14
申请号：US343310
申请日：1989-04-26
申请人： Mitsuharu Morishita , Kosaku Uota , Takeshi Yasukawa
发明人： Mitsuharu Morishita , Kosaku Uota , Takeshi Yasukawa
IPC分类号： B62D5/04
CPC分类号： B62D5/0478 , B62D5/0484
摘要： A motor-driven power assisted steering control apparatus includes a steering torque sensor 1, a motor 14 connected to a steering shaft via a clutch to exert an auxiliary steering force, and circuitry for controlling the motor in correspondence to an output from the steering torque sensing means. A torque neutral point detector 23 detects the neutral point of the steering torques, and first and second level detecting circuits 27, 29 detect when the motor current exceeds first and higher second levels, respectively. When the motor current exceeds the first level with the steering torque value at other than the neutral point, the clutch current is reduced to cause slippage, and when the motor current exceeds the second level with the steering torque value at other than the neutral point, the clutch current is interrupted to thereby stop the motor.

3. 发明授权

US4957182A Electric power steering apparatus 失效
标题翻译：电动助力转向装置
公开(公告)号：US4957182A
公开(公告)日：1990-09-18
申请号：US344579
申请日：1989-04-28
申请人： Mitsuharu Morishita , Kosaku Uota , Takeshi Yasukawa
发明人： Mitsuharu Morishita , Kosaku Uota , Takeshi Yasukawa
IPC分类号： A01N25/00 , A01N25/08 , A01N25/12 , A01N53/02 , B62D5/04
CPC分类号： B62D5/0493 , B62D5/0487
摘要： An electric power steering apparatus for an automotive vehicle has an interrupter which cuts off the power to a drive motor when a dangerous situation is detected. In one form of the invention, the interrupter cuts off power to the drive motor when a ground fault sensor detects a ground fault of a motor driver and there is disagreement between a directional drive signal to the drive motor and the direction of torque applied to the steering wheel by the driver. In another form of the invention, the interrupter circuit cuts off power when the vehicle speed exceeds a prescribed level and the torque applied to the steering wheel exceeds a prescribed level for a certain length of time. In a third form of the invention, the interrupter cuts off power when the motor current exceeds a prescribed level and disagreement of directional signals is detected.

4. 发明授权

US5027276A Electric power steering device having a fail-safe relay 失效
标题翻译：具有故障安全继电器的电动助力转向装置
公开(公告)号：US5027276A
公开(公告)日：1991-06-25
申请号：US333923
申请日：1989-04-06
申请人： Mitsuharu Morishita , Kosaku Uota , Takeshi Yasukawa
发明人： Mitsuharu Morishita , Kosaku Uota , Takeshi Yasukawa
IPC分类号： B62D5/04
CPC分类号： B62D5/0484
摘要： An electric power steering device is disclosed which comprises a fail-safe relay. The circuitry for operating the relay comprises the following: the neutral region detector circuit which generates an output when the steering torque applied by the operator is in the neutral region; a motor current detector circuit for detecting the motor current; an AND gate having inputs coupled to the above two circuits; a self-hold circuit for holding the output of the AND gate; and a relay interrupting circuit for interrupting the relay in response to the output of the self-hold circuit. Thus, the fail-safe relay is interrupted to disconnect the battery from the motor and clutch when the motor is energized in spite of the fact that the steering torque by the operator of the vehicle is in the neutral region.

5. 发明授权

US4984647A Electric power steering apparatus 失效
标题翻译：电动助力转向装置
公开(公告)号：US4984647A
公开(公告)日：1991-01-15
申请号：US532407
申请日：1990-06-04
申请人： Mitsuharu Morishita , Kosaku Uota , Takeshi Yasukawa
发明人： Mitsuharu Morishita , Kosaku Uota , Takeshi Yasukawa
IPC分类号： A01N25/00 , A01N25/08 , A01N25/12 , A01N53/02 , B62D5/04
CPC分类号： B62D5/0493 , B62D5/0487
摘要： An electric power steering apparatus for an automotive vehicle has an interrupter which cuts off the power to a drive motor when a dangerous situation is detected. In one form of the invention, the interrupter cuts off power to the drive motor when a ground fault sensor detects a ground fault of a motor driver and there is disagreement between a directional drive signal to the drive motor and the direction of torque applied to the steering wheel by the driver. In another form of the invention, the interrupter circuit cuts off power when the vehicle speed exceeds a prescribed level and the torque applied to the steering wheel exceeds a prescribed level for a certain length of time. In a third form of the invention, the interrupter cuts off power when the motor current exceeds a prescribed level and disagreement of directional signals is detected.

6. 发明授权

US4959787A Electric power steering device having a clutch 失效
标题翻译：具有离合器的电动助力转向装置
公开(公告)号：US4959787A
公开(公告)日：1990-09-25
申请号：US333503
申请日：1989-04-05
申请人： Mitsuharu Morishita , Kosaku Uota , Takeshi Yasukawa
发明人： Mitsuharu Morishita , Kosaku Uota , Takeshi Yasukawa
IPC分类号： B62D5/04
CPC分类号： B62D5/0478 , B62D5/0463 , B62D5/0493
摘要： An electric power steering device having a clutch 25 for connecting and disconnecting the motor 14 to and from the steering shaft is disclosed, the control circuit of which comprises, in addition to a microcomputer 3, an additional analog direction determiner circuit 17, and a first and a second logical circuit. The first logical circuit consists of a pair of AND gates 20A, 20B generates a final right or left direction signal supplied to the motor driver circuit. The second logical circuit consists of a pair of exclusive OR gates 21A, 21B and an AND gate 22 and supplies a deenergization signal to the clutch driver when the directions determined by the microcomputer and the analog direction determiner circuit disagree. The direction determiner circuit includes: a first comparator 31 which outputs a right direction signal when the output voltage of the torque sensor exceeds a first reference level; and a second comparator 32 which outputs a left direction signal when the output voltage of the torque sensor is below a second reference level which is lower than the first level. These reference voltages, selected at upper and lower ends of the non-sensitive region, may be obtained by a voltage divider.

7. 发明授权

US4896735A Electric motor assisted power steering device 失效
标题翻译：电动助力动力转向装置
公开(公告)号：US4896735A
公开(公告)日：1990-01-30
申请号：US330006
申请日：1989-03-30
申请人： Mitsuharu Morishita , Kosaku Uota , Takeshi Yasukawa
发明人： Mitsuharu Morishita , Kosaku Uota , Takeshi Yasukawa
IPC分类号： B62D5/04
CPC分类号： B62D5/0463 , B62D5/0493
摘要： An electric motor assisted power steering device for an automobile is disclosed which comprises a dupicate torque direction determination system. The power steering device comprises, in addition to a microcomputer for determining the amount and direction of the auxiliary torque which is to be provided by the electric motor, an analog direction determiner circuit for determining the direction of the auxiliary torque. The torque sensor outputs a voltage which is substantially in linear relationship with the steering torque applied by the operator. The direction determiner circuit includes: a first comparator which outputs a right direction signal when this output voltage of the torque sensor exceeds a first reference level; and a second comparator which outputs a left direction signal when the output voltage of the torque sensor is below a second reference level which is lower than the first level. These reference voltages, selected at upper and lower ends of the non-sensitive region, may be obtained by a voltage divider. The microcomputer determines, on the basis of the output of the torque sensor, the direction of the auxiliary torque and outputs a corresponding right or left direction signal. A first AND gate performs an AND operation on the two right direction signals outputted from the microcomputer and the analog circuit; a second AND gate performs an AND operation on the two left direction signals. The motor driver circuit controls the direction of the current supplied to the electric motor in accordance with the output of the first and the second AND gate.

8. 发明授权

US5202813A Driver device for a duty solenoid valve 失效
标题翻译：用于电磁阀的驱动装置
公开(公告)号：US5202813A
公开(公告)日：1993-04-13
申请号：US616980
申请日：1990-11-21
申请人： Kosaku Uota , Munehiko Mimura
发明人： Kosaku Uota , Munehiko Mimura
IPC分类号： G01R31/02 , G05D7/06 , G05D16/20
CPC分类号： G05D16/2013 , G05D7/0635
摘要： A driver device for a duty solenoid valve comprises a pair of transistors 27 and 31 for controlling the excitation current level flowing through the solenoid 17 of the valve, and a transistor 45 for turning on and off the excitation current. The excitation current level is detected via an integrator 63 and A/D converter 61 by a microcomputer 62. In response to the detected excitation current level, the microcomputer 62 generates a first pulse signal (PWM signal) via OUT3 to control the level of the excitation current to a target level. Further, the microcomputer 62 outputs a second pulse signal via the OUT4 to the transistor 45 to control the duty ratio of the solenoid 17.
摘要翻译：用于负载电磁阀的驱动装置包括一对用于控制流过阀的螺线管17的励磁电流水平的晶体管27和31以及用于导通和关断励磁电流的晶体管45。通过微机62通过积分器63和A / D转换器61检测励磁电流电平。响应于检测到的激励电流电平，微型计算机62经由OUT3产生第一脉冲信号（PWM信号），以控制电平激励电流达到目标水平。此外，微型计算机62经由OUT4将第二脉冲信号输出到晶体管45，以控制螺线管17的占空比。

9. 发明授权

US4763268A Direction display apparatus 失效
标题翻译：方向显示装置
公开(公告)号：US4763268A
公开(公告)日：1988-08-09
申请号：US854629
申请日：1986-04-22
申请人： Hisatsugu Itoh , Kosaku Uota
发明人： Hisatsugu Itoh , Kosaku Uota
IPC分类号： G01C21/00 , G01C21/14 , G06F15/50
CPC分类号： G01C21/14
摘要： A direction display system utilizing a traveling azimuth of a vehicle and an angular coordinate of the vehicle on polar coordinates with an origin set at a specified location to determine a direction of the specified location to be displayed by the use of an indicator taken with reference to a pictorial display pattern of the vehicle. The traveling azimuth may also be used to determine a traveling direction of the vehicle so that both the direction of the specified location and the traveling direction of the vehicle can be selectively displayed on a single display unit operated by a switch.
摘要翻译：一种利用车辆的行进方位角的方向显示系统和车辆在具有设定在指定位置处的原点的极坐标上的角坐标来确定通过使用参考的指示器来显示的指定位置的方向车辆的图形显示图案。行驶方位也可以用于确定车辆的行进方向，使得可以在由开关操作的单个显示单元上选择性地显示指定位置的方向和车辆的行驶方向。

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