APPARATUS FOR CORRECTING MIDPOINT OF STEERING FORCE SENSOR

摘要

PURPOSE:To perform automatic correction of the drift of an output caused by deterioration with time of a steering force sensor. CONSTITUTION:A straight-advancing-condition judging part 9 outputs a straight- advancing-condition achievement signal (b) when the rotating speeds of wheels have the specified relationship between the wheels. A vehicle-speed judging part 10 outputs a vehicle-speed-condition achievement signal (c) when the vehicle speed has exceeded a specified value. A changing-amount judging part 8 outputs a changing-condition achievement signal (a) when the outputted changing amount from a steering force sensor 5 within a scheduled time is less than a preset value. When all the signals a-c are outputted, the output of the steering force sensor 5 is received in a deflection detecting part 12, and the correction is performed so that the value becomes the midpoint of the sensor output. A second straight-advancing-condition judging part is further provided. This judging part outputs the straight-advancing-condition achievement signal when the relation of the actually measured wheel speeds is located with in the range of the operated value showing the relation of the wheel speeds where lateral G becomes less than the preset value.