Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Indication or control of braking – acceleration – or deceleration
Patent
1999-06-29
2000-09-19
Chin, Gary
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Indication or control of braking, acceleration, or deceleration
701 72, 701 75, 701 76, 180197, 702148, B60R 1600, G01P 1100
Patent
active
06122586&
ABSTRACT:
A vehicle velocity detecting device is provided for a vehicle. In the device, velocity range in which a difference among respective wheel speeds is caused due to brake noise is defined as a range of speed smaller than a designated velocity V.sub.0. When an average of driving wheels' speeds Vw.sub.Dave is smaller than the designated velocity V.sub.0 and the vehicle is under a great turning condition containing the straight traveling condition, then the smallest wheel speed Vw.sub.MIN is set to a vehicle velocity V.sub.sp in order to exclude the wheel speed being influenced by noise. While, when the vehicle is under a small turning condition where the wheel speed of turning inside wheel is smaller in spite of the same velocity range, the third wheel speed from the largest one is set to the vehicle velocity V.sub.sp to exclude the turning wheel speed. In the velocity range besides both turning conditions, the average of driving wheels' speeds Vw.sub.Dave is set to the vehicle velocity V.sub.sp, so that it is possible to attain the vehicle velocity similar to that detected by a earlier vehicle speed sensor for converting the rotating speed of an output shaft of a transmission.
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Chin Gary
Nissan Motor Co,. Ltd.
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