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1. 发明专利

JP2004279295A Power steering device 审中-公开
标题翻译：动力转向装置
公开(公告)号：JP2004279295A
公开(公告)日：2004-10-07
申请号：JP2003073194
申请日：2003-03-18
申请人： Toyoda Mach Works Ltd , 豊田工機株式会社
发明人： KATO HIDEKI , ASADA ATSUHISA
IPC分类号： G01L5/22 , B62D5/04 , G01M17/06
摘要： PROBLEM TO BE SOLVED: To easily reduce a residual torque to a level not hindering steering control, without requiring technical skill and long time regulation, to reduce a cost, and to stabilize performance.
SOLUTION: When a trigger signal is input, a CPU 31 reads an initially set program from a ROM 33, and executes following procedures. (1) The first torque value including the residual torque is detected in the first position where a steering wheel 1 is rotated by a prescribed angle along one direction around a steering wheel axial line from a neutral position, using an assist motor 20, to be stopped there. (2) The second torque value including the residual torque is detected in the second position where the steering wheel 1 is rotated by the same angle along the other direction from the neutral position, to be stopped there. (3) An average value of the first and second torque values is found to offset the negative and positive residual torques, and the average value is determined as an initial torque due to a difference between origin positions of a paired resolvers 12, 12. (4) The initial torque is stored as a correction value for a steering torque in a data storage area 33b.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了容易地将剩余转矩降低到不妨碍转向控制的水平，而不需要技术技能和长时间调节，降低成本并稳定性能。解决方案：当输入触发信号时，CPU 31从ROM 33读取初始设定的程序，并执行以下步骤。（1）使用辅助马达20，在方向盘1沿着从中立位置的方向盘轴线的一个方向旋转预定角度的第一位置检测包括残余扭矩的第一扭矩值为停在那里（2）在方向盘1从中立位置沿着另一个方向旋转相同角度的第二位置检测包括残余转矩的第二扭矩值，在那里停止。（3）发现第一和第二扭矩值的平均值抵消负和正的残余扭矩，并且平均值由于成对旋转变压器12,12的原点位置之间的差异而被确定为初始转矩。（ 4）将初始转矩作为转向转矩的修正值存储在数据存储区域33b中。版权所有（C）2005，JPO＆NCIPI

2. 发明专利

JP2005067535A Electric power steering device 有权
标题翻译：电动转向装置
公开(公告)号：JP2005067535A
公开(公告)日：2005-03-17
申请号：JP2003303342
申请日：2003-08-27
申请人： Favess Co Ltd , Koyo Seiko Co Ltd , Toyoda Mach Works Ltd , 光洋精工株式会社 , 株式会社ファーベス , 豊田工機株式会社
发明人： KATO HIDEKI
IPC分类号： B62D6/00 , B62D5/04 , B62D137/00
摘要： PROBLEM TO BE SOLVED: To provide an electric power steering device capable of suppressing generation of impact noise due to road surface reaction force.
SOLUTION: The device controls (S18) a motor from the time point (S16: YES) of zero displacement of the reciprocating displacement of a rack shaft 24, to the direction to reduce the rotating speed of a ball screw nut 52. The collision of the rack shaft 24 with the ball screw nut 52 is suppressed by controlling the motor and reducing the rotating speed of the ball screw nut 52 continuing the rotation by the inertia when the rack shaft is displaced by the road surface reaction force, the ball screw nut 52 is rotated accompanying with the fluctuation of the rack shaft 24, and the displacement speed of the rack shaft 24 is damped.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：解决的问题：提供能够抑制路面反作用力引起的冲击噪声产生的电动助力转向装置。解决方案：设备从齿条轴24的往复运动位移的零位移时间点（S16：是）到减小滚珠丝杠螺母52的转速的方向控制（S18）马达。齿条轴24与滚珠丝杠螺母52的碰撞被抑制，当齿条轴被路面反作用力移动时，通过控制马达并减小滚珠丝杠螺母52的旋转继续旋转的旋转速度，滚珠丝杠螺母52随着齿条轴24的波动而旋转，并且齿条轴24的移动速度被阻尼。版权所有（C）2005，JPO＆NCIPI

3. 发明专利

JP2004276815A Power steering device 有权
公开(公告)号：JP2004276815A
公开(公告)日：2004-10-07
申请号：JP2003073041
申请日：2003-03-18
申请人： Toyoda Mach Works Ltd , Toyota Motor Corp , トヨタ自動車株式会社 , 豊田工機株式会社
发明人： KATO HIDEKI , ASADA ATSUHISA , FUKUMOTO YASUTAKA , UEMAE HAJIME
IPC分类号： G01L3/10 , B62D5/04 , G01L5/22
摘要： PROBLEM TO BE SOLVED: To provide a power steering device capable of reducing cost and stabilizing performance by easily lowering residual torque to a level less than that not obstructing steering control without requiring skilled technique and long time adjustment work.
SOLUTION: This power steering device is formed so that, when trigger signals are inputted, a CPU 31 reads an initial set program from the program storage area 33a of a ROM 33 and performs the program following the procedure below.(1) With a steering wheel 1 stationarily held at a neutral position in a steering direction, the steering wheel 1 is rotated slightly while alternately reversing the steering wheel 1 around the axis thereof by using an assist motor 20 to reduce the residual torque appearing as a hysteresis between the steering wheel 1 and a torque sensor 10. (2) The slight rotating motion by the assist motor 20 is completed, and an initial torque primarily resulting from a difference between the origins of a pair of resolvers 12 and 12 is detected by the torque sensor 10 in the reduced state of the residual torque.(3) The detected initial torque is stored, as the corrected value of the steering torque, in a data storage area 33b of a steering control part 30.
COPYRIGHT: (C)2005,JPO&NCIPI

4. 发明专利

JP2004276827A Power steering device 审中-公开
公开(公告)号：JP2004276827A
公开(公告)日：2004-10-07
申请号：JP2003073277
申请日：2003-03-18
申请人： Toyoda Mach Works Ltd , 豊田工機株式会社
发明人： KATO HIDEKI , ASADA ATSUHISA
IPC分类号： G01L3/10 , B62D5/04 , G01L5/22
摘要： PROBLEM TO BE SOLVED: To provide a power steering device capable of preventing mis-operation from occurring in a controlled steering state when an initial torque cannot be normally detected due to personal error. SOLUTION: In this power steering device, when trigger signals are inputted, a CPU 31 reads an initial set program from the program storage area 33a of a ROM 33, and the program is performed following the procedure below. (1) The initial torque primarily resulting from a difference between the origin positions of a pair of resolvers 12 and 12 is detected by a torque sensor 10.(2) A first torque value for determination is detected by the torque sensor 10 at a first determination position where a steering wheel 1 is rotated by a predetermined angle in one direction around the axis of the steering wheel by using an assist motor 20 and stopped.(3) A second torque value for determination is detected in the same manner at a second determination position where the steering wheel 1 is rotated by the same angle from a neutral position in the other direction and stopped.(4) Whether the initial torque is normally detected or not is determined based on the first and second torque values. COPYRIGHT: (C)2005,JPO&NCIPI

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