Patent ID: 6224510
Filing Date: 2001-05-01
Classification: B60K,B60W,F16H,Y10T

Abstract:
A device for controlling a vehicle to travel at a constant speed comprising:an automatic transmission provided for an engine mounted on a vehicle;a throttle valve for adjusting the intake air amount taken in by said engine;a throttle opening degree detection means for detecting the opening degree of said throttle valve;a vehicle speed detection means for detecting the speed of said vehicle;a constant-speed travel control means for traveling the vehicle at a constant speed by controlling said throttle opening degree and the shift position of said automatic transmission, so that said vehicle speed comes into agreement with a target vehicle speed; anda downhill control means for resetting the overdrive position of said automatic transmission when the vehicle is traveling a downhill;wherein said downhill control means includes:a downhill state detection means for detecting the downhill state of said vehicle based on said throttle opening degree and said vehicle speed; andan overdrive reset means for resetting the overdrive position of said automatic transmission in response to said downhill state;wherein the reset state of said overdrive position is maintained while said downhill state is being detected.