Invention Grant
- Patent Title: Vehicle steering apparatus
- Patent Title (中): 车辆转向装置
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Application No.: US12090100Application Date: 2006-10-10
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Publication No.: US08229627B2Publication Date: 2012-07-24
- Inventor: Ippei Yamazaki
- Applicant: Ippei Yamazaki
- Applicant Address: JP Toyota-shi
- Assignee: Toyota Jidosha Kabushiki Kaisha
- Current Assignee: Toyota Jidosha Kabushiki Kaisha
- Current Assignee Address: JP Toyota-shi
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2005-298073 20051012
- International Application: PCT/JP2006/320517 WO 20061010
- International Announcement: WO2007/043673 WO 20070419
- Main IPC: A01B69/00
- IPC: A01B69/00 ; B62D6/00 ; B62D11/00 ; B62D12/00 ; B63G8/20 ; B63H25/04 ; G05D1/00 ; G06F7/00 ; G06F17/00 ; G06F19/00

Abstract:
A vehicle steering apparatus that can prevent a large returning torque from acting when a steering wheel is turned. Through processing of an assist control program, rotational torque (assist torque) of an electric motor is calculated by adding returning torque g·Trto to turning torque Tc (in actuality, subtracting the returning torque g·Trto from the turning torque Tc). The electric motor is driven and controlled in accordance with the calculated assist torque. When the steering torque is large, the calculated returning torque gain g decreases, and therefore, the returning torque g·Trto decreases or becomes zero. With this control, the greater the force (torque) required to operate the steering wheel, the smaller the influence of the returning torque, and steering feel at the time of turning the steering wheel is improved.
Public/Granted literature
- US20090157261A1 VEHICLE STEERING APPARATUS Public/Granted day:2009-06-18
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