| 摘要 |
A system and method for automatically controlling a vehicle speed to a desired cruise speed are disclosed in which a target opening angle of an engine throttle valve through which the vehicle can maintain a set cruise speed is derived in accordance with a prepared non-linear characteristic table and an opening angle of the throttle valve is controlled so that a detected vehicle speed coincides with the set cruise speed and a detected opening angle of the throttle valve coincides with the target opening angle. In addition, when the detected vehicle speed and detected opening angle are substantially constant for a predetermined time due to the vehicle being run on a flat road, average values of both detected vehicle speed and detected opening angle are derived and the above-described non-linear characteristic is corrected using both average values.
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