Patent ID: 6778897
Filing Date: 2004-08-17
Classification: B60K,B60W

Abstract:
A method of determining an amount of deceleration for a host vehicle having an adaptive cruise control that is following behind an in-path vehicle, the method comprising the steps of:determining a speed of the host vehicle and a speed of the in-path vehicle; determining a relative speed between the host vehicle and the in-path vehicle; determining a range between the host vehicle and the in-path vehicle; estimating a deceleration of the in-path vehicle; determining a deceleration of the host vehicle; calculating an instantaneous optimal deceleration amount needed to match the host vehicle speed with the in-path vehicle speed at a desired future range between the host vehicle and the in-path vehicle; determining a maximum deceleration, comparing the calculated instantaneous optimal deceleration amount to the maximum deceleration to determine the smaller deceleration, and selectively changing the host vehicle deceleration to the smaller deceleration; calculating a general deceleration; comparing the general deceleration to the smaller of the optimal deceleration amount and the maximum deceleration; and changing the host vehicle deceleration to the smaller of the compared decelerations.