• Patent Title: Electric power steering apparatus
  • Application No.: US16333356
    Application Date: 2018-03-06
  • Publication No.: US10946891B2
    Publication Date: 2021-03-16
  • Inventor: Toru SakaguchiShoya Maruyama
  • Applicant: NSK Ltd.
  • Applicant Address: JP Tokyo
  • Assignee: NSK Ltd.
  • Current Assignee: NSK Ltd.
  • Current Assignee Address: JP Tokyo
  • Agency: Sughrue Mion, PLLC
  • Priority: JPJP2017-078907 20170412,JPJP2017-234074 20171206
  • International Application: PCT/JP2018/008467 WO 20180306
  • International Announcement: WO2018/190036 WO 20181018
  • Main IPC: B62D5/04
  • IPC: B62D5/04 B62D3/12 B62D6/00
Electric power steering apparatus
Abstract:
An electric power steering apparatus that suppresses occurrence of an abnormal noise at end hitting without providing uncomfortable feeling of steering for a driver, attenuates impact force, and enables suppression of the abnormal noise without making a turning radius worse. The apparatus includes a viscoelastic model following control section that sets a viscoelastic model as a reference model within a predetermined range in front of a rack end, and outputs a control output to correct a current command value; and a rack end approach judging section that performs judgment of being in the predetermined range in front of the rack end based on steering position information; adjusts the control output based on at least the steering position information, a steering velocity and a steering state, and corrects the current command value by the adjusted control output.
Information query
IPC分类:
B 作业;运输
B62 无轨陆用车辆
B62D 机动车;挂车(农用机械或机具的转向机构或在所要求轨道上的引导装置入A01B69/00;车轮,脚轮,车轴,提高车轮的附着力入B60B;车用轮胎,轮胎充气或轮胎的更换入B60C;拖有挂车的牵引车或类似车辆之间的连接入B60D;轨道和道路两用车辆,两栖或可转换的车辆入B60F;悬架装置的配置入B60G;加热、冷却、通风或其他空气处理设备入B60H;车窗,挡风玻璃,非固定车顶,门或类似装置,车辆不用时的护套入B60J;动力装置的布置,辅助驱动装置,传动装置,控制机构,仪表或仪表板入B60K;电动车辆的电力装备或动力装置入B60L;电动车辆的电源线入B60M;其他类目不包含的乘客用设备入B60N;适用于货运或装载特殊货物或物体的入B60P;用于一般车辆信号或照明装置的布置,其安装或支承或者其电路入B60Q;其他类目不包含的车辆,车辆配件或车辆部件入B60R;其他类目不包含的保养,清洗,修理,支承,举升或调试入B60S;制动器布置,制动控制系统或其部件入B60T;气垫车入B60V;摩托车及其所用附件入B62J,B62K;车辆试验入G01M)
B62D5/00 助力的或动力驱动的转向机构(用于不可偏转车轮的入B62D11/00;一般液压伺服马达入F15B)
B62D5/04 .电力的,例如使用伺服电动机与转向器连接或构成转向器的零件
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