| 摘要 |
<p>When it is supposed that brake control began from a first point in time, a collision avoidance ECU calculates: a free running distance (X0) which is the distance that can be travelled by a vehicle from the first point in time to a second point in time in which the relative deceleration rate (Gr) starts to become greater due to the commencement of deceleration control; a mid-ascension travel distance (X1) which is the distance that can be travelled by the vehicle from the second point in time to a third point in time in which the relative deceleration rate (Gr) reaches a target relative deceleration rate (At); and a post-ascension travel distance (X2) which is the distance that can be travelled by the vehicle from the third point in time to a point in time in which a relative speed (Vr) becomes equal to or less than a predetermined speed (Vth). Moreover, the collision avoidance ECU derives a deceleration distance (Xth) on the basis of the result obtained from adding each of the aforementioned distances (X0, X1, X2). As a consequence, it is possible to improve the calculation accuracy of the deceleration distance (Xth).</p> |
