Recovery of calibrated center steering position after loss...

Details Recovery of calibrated center steering position after loss... Recovery of calibrated center steering position after loss...

2007-11-13

2007-11-13

Black, Thomas (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Vehicle subsystem or accessory control

C701S042000, C116S031000, C318S432000, C318S561000, C318S254100, C180S443000

Reexamination Certificate

active

11152512

ABSTRACT:
The steering angle of a vehicle is monitored using position sensors of an electric motor of an electric power assisted steering (EPAS) system. A position of the electric motor corresponding to the straight-ahead, center position of the steering system is stored in non-volatile memory during a steering calibration procedure, such as an end-of-line calibration in a vehicle assembly plant. Following power loss due to a dead battery, a steering angle zeroing procedure performed in a vehicle stability control (VSC) system generates a center position with enough accuracy to be within one electrical cycle of the motor. The pre-stored electric motor position is then used to determine the electrical cycle where the center position was located, and accurate monitoring of steering angle is resumed.

REFERENCES:
patent: 5406155 (1995-04-01), Persson
patent: 5625239 (1997-04-01), Persson et al.
patent: 5663616 (1997-09-01), Stringfellow et al.
patent: 5787375 (1998-07-01), Madau et al.
patent: 6046560 (2000-04-01), Lu et al.
patent: 6107767 (2000-08-01), Lu et al.
patent: 6184637 (2001-02-01), Yamawaki et al.
patent: 6354396 (2002-03-01), Horton et al.
patent: 6364050 (2002-04-01), Horton
patent: 6665598 (2003-12-01), Nakano et al.
patent: 6925412 (2005-08-01), Rauer et al.
patent: 6976555 (2005-12-01), Husain et al.
patent: 6983647 (2006-01-01), Nagaoka et al.
patent: 7085638 (2006-08-01), Knoll
patent: 7149615 (2006-12-01), Ura
patent: 7215112 (2007-05-01), Recio et al.
patent: 2002/0022913 (2002-02-01), Font
patent: 2003/0144780 (2003-07-01), Recker et al.
patent: 2004/0059486 (2004-03-01), Takuma et al.
patent: 2005/0087121 (2005-04-01), Brown et al.
patent: 2006/0241790 (2006-10-01), Chen et al.
patent: 1020344 (2000-07-01), None
patent: 1026068 (2000-08-01), None
patent: 2003070284 (2003-03-01), None
patent: WO 99/08374 (1999-02-01), None

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