VEHICLE RUNNING ASSIST APPARATUS

摘要

A collision avoidance ECU sets a target relative deceleration to a first target value when a brake control starting condition is satisfied, and carries out a first brake control for bringing a relative deceleration closer to the target relative deceleration. When a reference relative deceleration with reference to the relative deceleration at a first point in time has reached a specified relative deceleration, the collision avoidance ECU determines a greater value for a second target value when the amount of change in deceleration, which is the amount of change in the reference relative deceleration at the point in time, is small than when the amount of change in deceleration is large. The collision avoidance ECU then sets the target relative deceleration to the second target value, and carries out a second brake control for bringing the relative deceleration closer to the target relative deceleration.

主权项

1. A vehicle travel assist apparatus, which performs speed-reduction control in which a relative deceleration of a host vehicle with respect to an object present ahead of the host vehicle in a traveling direction becomes equal to a target relative deceleration, and a relative speed of the host vehicle with reference to the object becomes less than or equal to a specified speed at a target position set behind the object, the vehicle travel assist apparatus being characterized in that
at the time when a starting condition of the speed-reduction control is met, the target relative deceleration is set as a first target value, and first speed-reduction control is performed to bring the relative deceleration closer to the target relative deceleration, when a reference relative deceleration, which is determined with reference to a relative deceleration at the time point when the first speed-reduction control has started, reaches a specified relative deceleration, if a deceleration change amount, which is an amount of change in the reference relative deceleration at the time point, is small, a second target value is set to a greater value than that in a case where the deceleration change amount at the time point is great, and the second speed-reduction control is performed to set the target relative deceleration to the second target value and bring the relative deceleration closer to the target relative deceleration.