Patent ID: 8078383
Filing Date: 2011-12-13
Classification: B60W

Abstract:
1. A speed control system for vehicles comprising: means for detecting a distance to a preceding vehicle; means for detecting a relative speed between a subject vehicle and the preceding vehicle; means for computing a corrected distance condition evaluation index which is increased with increase in the relative speed when approaching the preceding vehicle and whose increase gradient becomes greater as the distance to the preceding vehicle becomes shorter at each relative speed as an index indicating the condition of approaching or separating from the preceding vehicle by taking into consideration of a speed of the preceding vehicle; first means for setting a threshold value of the corrected distance condition evaluation index and taking an offset amount preset with respect to distance as zero value of distance at the threshold value of the corrected distance condition evaluation index; means for checking whether the corrected distance condition evaluation index is higher than the threshold value of the corrected distance condition evaluation index; second means for setting the threshold value of the corrected distance condition evaluation index as a target value of the corrected distance condition evaluation index when the corrected distance condition evaluation index is higher than the threshold value of the corrected distance; means for computing the target deceleration of the subject vehicle based on a target relative speed corresponding to the target value set by the means for setting the threshold value as the target value and an actual relative speed; and means for starting deceleration control to decelerate the subject vehicle so that deceleration of the subject vehicle becomes equal to the target deceleration.