VEHICULAR CONSTANT SPEED TRAVEL DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a vehicular constant speed travel device which can judge climbing road travel with comparatively simple constitution. SOLUTION: In this vehicular constant speed travel device which has a cruise setting means 26 to set a constant speed travel speed, a DC motor 12 to control opening of a throttle valve 6, a cruise control means 24 to control actuation of the DC motor 12 and an automatic transmission 20 to switch a travel speed of a vehicle and in which the cruise control means 24 adjusts opening of the throttle valve 6 so that an actual travel speed of the vehicle becomes a preset travel speed set by the cruise setting means 26, the cruise control means 24 judges that the vehicle travels on a climbing road by generating a climbing road judging flag when a condition where the actual travel speed is lower by a specific speed or more than the preset travel speed continues for a specific time.