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公开(公告)号：US4830137A
公开(公告)日：1989-05-16
申请号：US136761
申请日：1987-12-22
IPC分类号： B62D6/02 , B62D5/04 , B62D6/00 , B62D101/00 , B62D119/00
CPC分类号： B62D5/049 , B62D5/0436
摘要： Output signals from first and second speed sensors are inputted in a control unit to measure a car speed on the basis of the signals. When the measured value is higher than a predetermined value, control unit determines that one of the speed sensors is abnormal, whereby a motor current to be fed to a d.c. motor is interrupted and a voltage applied to a magnetic clutch is removed.
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公开(公告)号：US4886136A
公开(公告)日：1989-12-12
申请号：US136757
申请日：1987-12-22
IPC分类号： B62D6/02 , B62D5/04 , B62D5/06 , B62D6/00 , B62D119/00
CPC分类号： B62D5/049
摘要： A motor-driven type power assisted steering control apparatus has a torque sensor which is provided with first and second displacement-electric signal converting units and a control unit which is adapted to break a motor current and to interrupt application of a voltage to an electromagnetic clutch as soon as abnormality in the torque sensor is detected on the basis of the electric signals of the first and second displacement-electric signal converting units.
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公开(公告)号：US5039926A
公开(公告)日：1991-08-13
申请号：US591162
申请日：1990-10-01
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.
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公开(公告)号：US4782907A
公开(公告)日：1988-11-08
申请号：US040814
申请日：1987-04-21
IPC分类号： B62D5/04 , B62D6/00 , B62D7/14 , B62D101/00 , B62D113/00
CPC分类号： B62D7/148
摘要： A motor-driven power steering system for front and rear road wheels which is capable of preventing uncontrolled steering resulting from abnormal movement of the rear road wheels in case of a failure in various sensors and/or an electric motor or breakage in the wiring, and enabling vehicle to continuously travel in a safe manner by means of front wheel steering alone after occurrence of such troubles.
摘要翻译： 一种用于前轮和后轮的电动助力转向系统，其能够防止在各种传感器和/或电动机故障或接线中断时的后轮的异常运动引起的不受控制的转向，以及 使得车辆在发生这种故障之后仅通过前轮转向以安全的方式连续行驶。
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公开(公告)号：US4856323A
公开(公告)日：1989-08-15
申请号：US260276
申请日：1988-10-20
CPC分类号： B62D6/10
摘要： A steering torque detecting device comprises a steering shaft consisting of an input shaft and an output shaft, a torsion bar provided between the input shaft and the output shaft, a torque detecting unit for converting a quantity of torsion produced in the torsion bar into an electric output, an electricity collecting unit comprising slip rings and brushes which takes the electric output and supplies an electric power from an outer power source, bearings for supporting the input and output shaft on the same axial line, and a housing supporting the bearings, a printed wiring board in a circular plate form which is provided at its one surface with a resistance layer and an output electrode radially spaced apart from the resistance layer, the resistance layer and the output electrode constituting a potentiometer, and a slider having a portion extending in the radial direction of the circular printed wiring board so as to have contacting areas with a small width to the resistance layer and the output electrode.
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公开(公告)号：US4837690A
公开(公告)日：1989-06-06
申请号：US40813
申请日：1987-04-21
CPC分类号： B62D5/0481 , B62D5/0439 , B62D5/0478
摘要： A motor-driven power steering system for a vehicle capable of preventing abrupt change in the steering motion or torque an operator even when the battery has been suddenly depleted or excessively discharged during travel of the vehicle, thereby avoiding any possible panic resulting from sudden loss of power assist. The motor-driven power steering system comprises a motor connected to be energized by the battery for power assisting steering motion of the operator, an electromagnetic sliding clutch connected to continuously change the power-assisting force transmitted from the motor to steerable road wheels in accordance with the intensity of current supplied thereto from the battery, a torque sensor for detecting operator-induced steering torque, a battery sensor for detecting a condition of charge of the battery, and a control unit connected to control both the voltage imposed on the motor and the current supplied to the electromagnetic sliding clutch such that they are made zero if the battery has been depleted, while on the other hand, at least one of the motor voltage and the clutch current is gradually reduced if the battery is insufficiently charged. An electromagnetic switching clutch may be provided to be switched on when the traveling speed of the vehicle is less than a predetermined level, but switched off when the travelling speed of the vehicle is above the predetermined level or if the battery has been depleted. An alarm device may also be provided for warning the operator of the depletion or insufficient charge of the battery.
摘要翻译： 一种用于车辆的电动机动力转向系统，其能够防止在车辆行驶期间电池突然耗尽或过度排放的操作者的转向运动或扭矩的突然变化，从而避免由于突然的损失导致的任何可能的恐慌 动力辅助 马达驱动的动力转向系统包括电动机，其连接以由电池供电以辅助操作者的转向运动，电磁滑动离合器，其连接以将根据电动机传递的电动辅助力连续地改变为可转向的车轮 从电池供给的电流的强度，用于检测操作者引导的转向扭矩的扭矩传感器，用于检测电池的充电状况的电池传感器，以及连接以控制施加在电动机上的电压的控制单元 电流被提供给电磁滑动离合器，使得如果电池已经耗尽，则它们变为零，而另一方面，如果电池充电不足，则马达电压和离合器电流中的至少一个逐渐减小。 当车辆的行驶速度小于预定水平时，电动切换离合器可被设置为接通，而当车辆的行驶速度高于预定水平时或者如果电池已经耗尽时，电磁切换离合器被切断。 还可以提供报警装置，用于警告操作者电池的耗尽或充电不足。
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7.发明授权
公开(公告)号：US4736810A
公开(公告)日：1988-04-12
申请号：US60891
申请日：1987-06-12
CPC分类号： B62D5/0487
摘要： A fail safe system for a motor driven power steering apparatus comprises a DC motor for subsidiarily energized said steering apparatus; a handle for receiving steering rotary force to produce a corresponding steering torque; a torque sensor for producing a signal corresponding to said rotary force applied to said handle, said torque sensor comprising a potentiometer having a movable electrode for detecting a torsional angle owing to said steering torque and a torque neutral region sensor arranged to operate together with said movable electrode for detecting a neutral region of said steering torque to produce a signal indicating whether said steering torque is within said torque neutral region or not; a motor current detection circuit for detecting a current flowing in said DC motor; an electromagnetic clutch for coupling/decoupling an output of said DC motor to/from said steering apparatus; a power supply circuit for supplying electric power to said DC motor and said electromagnetic clutch; and a fail safe relay provided with a normally opened contact connected in series in said power supply circuit; said fail safe relay being interrupted to remove said subsidiary steering force when a larger current exceeding said torque neutral region flows in said motor-current detection circuit while said torque neutral region sensor produces the signal indicating that said steering torque is within said torque neutral region.
摘要翻译： 用于电动机动力转向装置的故障安全系统包括用于辅助通电的所述转向装置的直流电动机; 用于接收转向旋转力以产生相应的转向扭矩的手柄; 用于产生对应于施加到所述手柄的所述旋转力的信号的扭矩传感器，所述扭矩传感器包括电位器，所述电位计具有用于检测由于所述转向转矩引起的扭转角的可动电极和布置成与所述可移动 电极，用于检测所述转向转矩的中性区域，以产生指示所述转向转矩是否在所述转矩中性区域内的信号; 电动机电流检测电路，用于检测在所述直流电动机中流动的电流; 电磁离合器，用于将所述直流电动机的输出与所述转向装置相耦合/解耦; 用于向所述DC电动机和所述电磁离合器供电的电源电路; 以及具有在所述电源电路中串联连接的常开触点的故障安全继电器; 当超过所述扭矩中性区域的较大电流在所述电动机电流检测电路中流动时，所述故障安全继电器被中断以去除所述辅助转向力，同时所述转矩中性点传感器产生指示所述转向转矩在所述转矩中立区域内的信号。
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公开(公告)号：US4724916A
公开(公告)日：1988-02-16
申请号：US26466
申请日：1987-03-16
CPC分类号： B62D5/0478 , B62D5/0439
摘要： A motor-driven power steering system for a vehicle wherein vehicle speed and operator-induced steering torque are detected for the control of power-assisting steering operation; a vehicle-speed sensor for detecting the vehicle speed to generate an output signal representative of the detected vehicle speed; a motor connected to be energized by a battery to transmit a force to the steerable road wheels for power assisting steering motion caused by the operator through the steering wheel; a first electromagnetic sliding clutch for controlling the power-assisting force transmitted from the motor to the steerable road wheels; a second electromagnetic switching clutch connected to be switched off for interrupting the transmission of the power-assisting force from the motor toward the steerable road wheels when the vehicle speed increases above a prescribed level, and switched on for transmission of the power-steering force therebetween when the vehicle speed decreases below the prescribed level; and a control unit connected to receive output signals from the torque sensor and the vehicle-speed sensor for controlling respective running and switching operations of the motor and the first sliding clutch in such a manner that the power-assisting force transmitted from the motor to the steerable road wheels through the first sliding clutch is gradually decreased before the second switching clutch is switched off, and gradually increased after the second switching clutch is switched on.
摘要翻译： 一种用于车辆的电动助力转向系统，其中检测到用于控制助力转向操作的车辆速度和操作者引导的转向扭矩; 用于检测车速以产生表示检测到的车辆速度的输出信号的车速传感器; 连接在电动机上的电动机，用于向所述可转向车轮传递力，用于通过所述方向盘对由操作者引起的转向运动进行助力; 第一电磁滑动离合器，用于控制从电动机传递到可转向车轮的动力辅助力; 第二电磁切换离合器，其被连接以在车速增加到规定水平以上时中断从电动机向可转向车轮的动力辅助力的传递，并被接通以使其间的动力转向力传递 当车速降低到规定水平以下时; 以及控制单元，其连接以接收来自扭矩传感器和车速传感器的输出信号，用于控制电动机和第一滑动离合器的各个行驶和切换操作，使得从电动机传递到 在第二切换离合器关闭之前通过第一滑动离合器的可转向的车轮逐渐减小，并且在第二切换离合器接通之后逐渐增加。
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9.发明授权
公开(公告)号：US4724915A
公开(公告)日：1988-02-16
申请号：US21488
申请日：1987-03-04
CPC分类号： B62D6/10
摘要： A device for controlling a motor-driven power steering system for a vehicle comprising: a torque sensor for detecting operator-induced steering force exerted on a steering wheel by an operator and generating a voltage signal representative thereof; a motor operatively connected to power assist the steering motion caused by the operator through the steering wheel; a control unit electrically connected with the torque sensor through a connector interposed therebetween for controlling the power-assisting operation of the motor in response to the operator-induced steering torque detected by the torque sensor; and a converter interposed between the torque sensor and the connector for converting the voltage signal generated by the torque sensor into a proportional current signal to be supplied to the control unit. With the above arrangement, the control unit is input with an electrical signal precisely representing the steering torque measured by the torque sensor without being affected by any voltage drop during transmission of the electrical signal from the torque sensor to the control unit, so that the control unit can control the power assisting operation of the motor in accordance with the measured steering torque in a most precise manner.
摘要翻译： 一种用于控制用于车辆的电动助力转向系统的装置，包括：扭矩传感器，用于检测由操作者施加在方向盘上的操作者引起的转向力并产生代表其的电压信号; 可操作地连接到动力的马达有助于操作者通过方向盘引起的转向运动; 控制单元，其通过插入其间的连接器与所述扭矩传感器电连接，用于响应于由所述转矩传感器检测到的所述操作者引导的转向转矩来控制所述电动机的功率辅助操作; 以及插入在转矩传感器和连接器之间的转换器，用于将由转矩传感器产生的电压信号转换成要提供给控制单元的比例电流信号。 利用上述结构，控制单元输入精确地表示由转矩传感器测量的转向转矩的电信号，而不受电力信号从转矩传感器传输到控制单元的任何电压降的影响，从而控制单元 单元可以以最精确的方式根据所测量的转向转矩来控制电动机的动力辅助操作。
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公开(公告)号：US4789040A
公开(公告)日：1988-12-06
申请号：US60859
申请日：1987-06-12
IPC分类号： B62D5/04
CPC分类号： B62D5/0496 , Y10S388/923 , Y10S388/93 , Y10S388/934
摘要： A motor-driven power steering system for a vehicle capable of preventing a motor-related element such as a motor itself, power elements for controlling power supply to the motor or the like from being damage due to an abnormal temperature rise or overheating thereof, thereby substantially avoiding or reducing resultant unsureness or instability in the operator's steering feeling upon change in steering mode as well as improving safety in steering operation. The motor is operatively connected with a steering rack and energizable by a power source for power assisting the steering motion caused by the operator through a steering wheel. A temperature sensor detects the temperature of the motor-related element. An electromagnetic switching clutch is interposed between the motor and the steering rack for selectively establishing and interrupting the transmission of power assisting force from the motor to the steering rack in accordance with the travelling speed of the vehicle. A control uint is provided for controlling the operation of the motor in such a manner such that when the detected temperature of the motor-related element is higher than a prescribed level, the current supplied to the motor through the motor-related element is gradually reduced to lower the temperature of the motor-related element.
摘要翻译： 一种用于车辆的电动机动力转向系统，其能够防止诸如电动机本身的电动机相关元件，用于控制对电动机等的供电的功率元件由于其异常升温或过热而造成的损坏，由此 基本上避免或减少了在转向模式改变时操作者的转向感觉中的不稳定性或不稳定性，以及提高转向操作的安全性。 电动机可操作地与转向齿条连接，并且可通过动力源激励，以便通过方向盘来辅助操作者引起的转向运动。 温度传感器检测电机相关元件的温度。 电动切换离合器介于电动机和转向架之间，用于根据车辆行驶速度有选择地建立和中断从电动机到转向架的动力辅助力的传递。 提供了一种控制装置，用于以这样的方式控制电动机的操作，使得当电动机相关元件的检测温度高于规定水平时，通过电动机相关元件供应到电动机的电流逐渐减小 降低电机相关元件的温度。
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