Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle subsystem or accessory control
Reexamination Certificate
2005-08-16
2005-08-16
Camby, Richard M. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle subsystem or accessory control
C701S042000, C180S443000, C180S446000
Reexamination Certificate
active
06931313
ABSTRACT:
A first ECU30detects 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 ECU30estimates 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 ECU30judges whether the grip factor is below a second OS (oversteer) start threshold value. A second ECU40controls the transfer ratio according to the vehicle state when the grip factor is less than the second OS start threshold value.
REFERENCES:
patent: 5265019 (1993-11-01), Harara et al.
patent: 6155377 (2000-12-01), Tokunaga et al.
patent: 6240350 (2001-05-01), Endo
patent: 6415212 (2002-07-01), Nishizaki et al.
patent: 6415215 (2002-07-01), Nishizaki et al.
patent: 6556911 (2003-04-01), Matsuno
patent: 6792343 (2004-09-01), Yasui et al.
patent: 2002/0029102 (2002-03-01), Badenoch
patent: 41 34 390 (1992-04-01), None
patent: 1 232 930 (2002-08-01), None
patent: 11-99956 (1999-04-01), None
patent: 2000-62597 (2000-02-01), None
patent: 2000-108863 (2000-04-01), None
patent: 2002-254964 (2002-09-01), None
Shiro Sasaki, Automobile Technical Handbook vol. 1 Foundation and Theoretical Edition, 5 pages, Dec. 1, 1990.
Aizawa Hiroaki
Imoto Yuzo
Kato Hiroaki
Momiyama Minekazu
Muragishi Yuji
Advics Co., Ltd.
Camby Richard M.
Toyoda Koki Kabushiki Kaisha
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