CRUISE OPERATION FUEL EFFICIENCY IMPROVEMENT CONTROL METHOD USING SYSTEM COOPERATION AND CRUISE CONTROL SYSTEM

A cruise operation fuel efficiency improvement control method, the method may include detecting, by an engine control unit, a cruise Resume request during a coasting running state of a vehicle; controlling a NCC Cruise Control which performs a cruise toque control of the vehicle after performing a control of an Electronic Stability Control (ESC) which sets a vehicle speed to a cruise target speed followed by a control of a transmission control unit, when the coasting running is a Neutral Control Coasting (NCC); and controlling a SSC Cruise Control which performs the cruise toque control of the vehicle after performing the control of the Electronic Stability Control (ESC) when the coasting running is a Start Stop Control (SSC).