Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle subsystem or accessory control
Reexamination Certificate
2004-09-14
2008-10-21
Camby, Richard M. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle subsystem or accessory control
C701S042000, C701S071000, C701S082000
Reexamination Certificate
active
07440829
ABSTRACT:
The present invention provides a steering angle estimating apparatus for vehicle that can accurately determine a steady state at all the steering angles, and can estimate the steering angle as much as possible even in a non-steady state. In the steering angle estimating apparatus for vehicle that has wheel rotational velocity sensors for four wheels, respectively, and estimates the steering angle of the vehicle based on wheel rotational velocities from the wheel rotational velocity sensors, relationships in the wheel rotational velocities between respective combinations of two wheels of the front and rear wheels on right and left sides are compared so that slip of the four wheels is detected.
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Sakaj Shin-Ichiro, et al., “Novel Wheel Skid Detection Method without Chassis Velocity for Electric Vehicle”, T. ISS, 2000, pp. 281-287, vol. 120-D, No. 2.
Camby Richard M.
NSK Ltd.
NSK Steering Systems Co., Ltd.
Sughrue & Mion, PLLC
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