Steering control device

Details Steering control device Steering control device

2007-11-06

2007-11-06

Black, Thomas (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

10728367

ABSTRACT:
The object of the present invention is to provide steering responsiveness and linear steering perception when the steering wheel is restored, even when there is excessive, sudden steering beyond a predetermined tolerance (−θE≦θ≦θE).If a steering angle θ suddenly enters a “play” range at the left and right ends of the θ−Xnplane, the steering direction (turning direction/restoring direction) of the steering wheel can lead to a localized change in the gear ratio (∂Xn/∂θ). FIG.3is a graph showing an example of this type of hysteresis loop. When a driver tries to get out of the “play” range by turning the steering wheel in the restoring direction, a positive value can be achieved for the localized gear ratio based on the above hysteresis loop even in the “play” range. Thus, based on this arrangement, if the steering angle θ exceeds the tolerance range, the localized gear ratio can be prevented from being continuously 0 when the steering wheel is immediately turned in the restoring direction.

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European Search Report for EP 03 02 7691 completed on Nov. 18, 2004.
Patent Abstracts of Japan for JP 05-105100 published on Apr. 27, 1993.
Patent Abstracts of Japan for JP 2001-334947 published on Dec. 4, 2001.

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