发明授权
- 专利标题: Vehicular variable steering ratio control device and control method thereof
- 专利标题(中): 车辆可变转向比控制装置及其控制方法
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申请号: US11581460申请日: 2006-10-17
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公开(公告)号: US07530423B2公开(公告)日: 2009-05-12
- 发明人: Theerawat Limpibunterng , Takahiro Kojo
- 申请人: Theerawat Limpibunterng , Takahiro Kojo
- 申请人地址: JP Toyota
- 专利权人: Toyota Jidosha Kabushiki Kaisha
- 当前专利权人: Toyota Jidosha Kabushiki Kaisha
- 当前专利权人地址: JP Toyota
- 代理机构: Oliff & Berridge, PLC
- 优先权: JP2005-319512 20051102
- 主分类号: B62D5/04
- IPC分类号: B62D5/04
摘要:
An operation torque estimating portion estimates an operation torque Th of a driver based on an input angle θh and an input torque T output from a torque sensor. A non-holding state detecting portion determines whether the driver is holding a steering wheel by comparing an absolute value of the operation torque Th and a predetermined value ε1. An equilibrium detecting portion determines whether an equilibrium point is reached by comparing the absolute value of the input torque T with a predetermined value ε2. When it is determined that the driver is not holding the steering wheel and the equilibrium point is reached, a switching portion switches to such a position that causes a target steering adjusting portion to multiply a target output angle θ pm by a predetermined gain G according to the input torque T so that the target steering angle is made smaller.