Auto cruise control and system for hybrid electric vehicles

An auto cruise control system for a hybrid electric vehicle, comprising:

• a memory configured to store program instructions;
• and
• a processor configured to execute the program instructions, the program instructions when executed configured to:
• turn on an auto cruise control mode in response to receiving a user input of a target vehicle speed in the hybrid electric vehicle using an engine and a driving motor as vehicle driving sources, and turning on a pulse and glide (PnG) mode;
• provide a user interface (UI) device to allow user selection of any one of a PnG coast mode, a PnG glide mode and a PnG constant-speed cruise mode;
• and
• operate the hybrid vehicle in a selected mode based on the user selection through the UI device,
• wherein in the PnG coast mode, a pulse phase that corresponds to a vehicle acceleration section and a coast phase that corresponds to a second deceleration section are alternately repeated between set upper and lower limit target vehicle speeds, and coasting of the hybrid electric vehicle by inertia of the hybrid electric vehicle is performed in the coast phase,
• wherein in the PnG glide mode, the pulse phase that corresponds to the vehicle acceleration section and a glide phase that corresponds to a vehicle deceleration section are alternately repeated between the set upper and lower limit target vehicle speeds, and deceleration driving of the hybrid electric vehicle based on a speed profile, set by inertia of the hybrid electric vehicle and torque assistance of the driving motor, is performed in the glide phase,
• wherein in the PnG constant-speed cruise mode, the target vehicle speed is maintained using the vehicle driving sources,
• wherein when the PnG glide mode is selected and deceleration setup information is input through the UI device, the speed profile is set according to the deceleration setup information, and
• wherein the deceleration setup information is an amount of torque assistance by the driving motor.