Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle subsystem or accessory control
Reexamination Certificate
2008-04-15
2008-04-15
Chin, Gary (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle subsystem or accessory control
C180S443000, C180S446000
Reexamination Certificate
active
11132412
ABSTRACT:
In a vehicle steering apparatus, front wheels are controlled to be turned by a computer program processing. A displacement/torque conversion section51converts a steering angle θ into a steering torque Td that is in relation of exponential function. A torque/lateral-acceleration conversion section52, torque/yaw-rate conversion section53and torque/curvature conversion section54convert into an anticipated lateral acceleration Gd, anticipated yaw rate γd and anticipated turning curvature ρd based upon the steering torque Td. Turning angle conversion sections55, 56and57calculate target turning angles δg, δγ and δρ. A turning angle deciding section58decides a target turning angle δd among the target turning angles δg, δγ and δρ according to the detected vehicle speed V. A turning control section60controls the steered wheels to be turned into the target turning angle δd. Herewith, the vehicle steering apparatus of the present invention can turn the vehicle so as to be adapted to a man's perception characteristic in all speed areas with respect to an operation on a steering handle by a driver. Therefore, the driver can easily drive the vehicle in all speed areas.
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Goto Takeshi
Kurosawa Ryuichi
Mikida Toshiyuki
Sugitani Tatsuo
Tozu Kenji
Aisin Seiki Kabushiki Kaisha
Chin Gary
Toyota Jidosha & Kabushiki Kaisha
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