- 专利标题: Vehicular steering device
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申请号: US10932114申请日: 2004-09-02
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公开(公告)号: US20050071061A1公开(公告)日: 2005-03-31
- 发明人: Hiroaki Kato , Minekazu Momiyama , Takayuki Ohta , Yoshiyuki Yasui , Yuzo Imoto , Hiroaki Aizawa , Eiichi Ono , Yuji Muragishi
- 申请人: Hiroaki Kato , Minekazu Momiyama , Takayuki Ohta , Yoshiyuki Yasui , Yuzo Imoto , Hiroaki Aizawa , Eiichi Ono , Yuji Muragishi
- 申请人地址: JP Kariya-shi JP Kariya-shi 448-8688
- 专利权人: TOYODA KOKI KABUSHIKI KAISHA,ADVICS CO., LTD.
- 当前专利权人: TOYODA KOKI KABUSHIKI KAISHA,ADVICS CO., LTD.
- 当前专利权人地址: JP Kariya-shi JP Kariya-shi 448-8688
- 优先权: JP2003-321872 20030912
- 主分类号: B60T8/172
- IPC分类号: B60T8/172 ; B62D5/00 ; B62D6/00 ; B62D101/00 ; B62D103/00 ; B62D111/00 ; B62D113/00 ; B62D119/00 ; B62D137/00 ; B62D5/04
摘要:
A first ECU 30 detects a steering torque applied to a steering system, estimates a self-aligning torque generated in a front wheel on the basis of the steering torque, and estimates a side force for the front wheel on the basis of lateral acceleration and a yaw rate. The first ECU 30 estimates a grip factor ε for the front wheel on the basis of a change of the self-aligning torque to the side force. The first ECU 30 judges whether the grip factor is below a second OS (oversteer) start threshold value. A second ECU 40 controls the transfer ratio according to the vehicle state when the grip factor is less than the second OS start threshold value.
公开/授权文献
- US06931313B2 Vehicular steering device 公开/授权日:2005-08-16