Patent ID: 6311121
Filing Date: 2001-10-30
Classification: B60K,G01S

Abstract:
A vehicle running control apparatus comprising:detection means for detecting the change of a difference in frequency between an electromagnetic wave signal transmitted from a vehicle and an electromagnetic wave signal having a Doppler shift reflected from an object and generating information inclusive of a distance between said object and said vehicle and a relative speed of one of said object and said vehicle to the other on the basis of said change in frequency difference;desired speed generation means for generating a desired speed on the basis of said information generated by said detection means and information of the running of said vehicle so that said change in frequency difference is generated;speed control means for generating a signal for control of the speed of said vehicle on the basis of said desired speed;wherein said desired speed generation means sets said desired speed so that the detected relative speed takes a value in a predetermined range unequal to zero; andwherein said desired speed generation means includes means for setting a time-dependent changing desired speed when the detected relative speed comes to the value in the predetermined range unequal to zero.