Steering angle middle point detecting device and power steering

Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle subsystem or accessory control

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Details

180443, 180444, 180446, 180404, 180422, 318432, 318422, 318489, 318663, B62D 1100

Patent

active

06131059&

ABSTRACT:
The present invention provides a steering angle middle point detecting device which does not need a torque sensor, can detect a steering angle middle point with high precision without being affected by driving habits of drivers and road conditions, and can reduce memory size, and a power steering apparatus having the device. A continuous time period during which the vehicle speed is higher than a predetermined value and the steering angular velocity is lower than a predetermined value is counted, and each time the counted time has reached a predetermined time period, a detected steering angle and current are stored in a first memory. Each time the number of pairs of the steering angle and current has reached a predetermined number, the steering angle of the pair including the minimum current is stored in a second memory, the average value of the stored steering angles is found, and the resulting average value or the steering angle closest to the average value that is selected from the second memory is defined as a steering angle middle point.

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