Patent ID: 6870468

Claim:
An adaptive cruise speed controlling apparatus for an automotive vehicle, comprising: a target vehicular velocity setting section that sets a target vehicular velocity in such a way that an addition value of a difference between a target inter-vehicle distance from the vehicle to a preceding vehicle, the preceding vehicle running ahead of the vehicle on the same traffic lane, and an actual inter-vehicle distance thereof multiplied by a first gain and a relative velocity between the vehicle and the preceding vehicle multiplied by a second gain is included in the set vehicular velocity; and a control gain setting section that sets the first and second gains to control a vehicular driving force to make the inter-vehicle distance substantially equal to the target inter-vehicle distance and to converge the inter-vehicle distance into the target inter-vehicle distance within a predetermined small overshoot crossing the target inter-vehicle distance when a size of an external form of the preceding vehicle is larger than a predetermined size.