Hybrid electric vehicle and driving control method therefor

A hybrid electric vehicle comprising:

• an engine;
• a driving motor;
• an engine clutch disposed between the engine and the driving motor;
• a step-variable transmission having an input terminal connected to the driving motor;
• and
• a controller unit configured to
• prohibit shifting of the step-variable transmission based on determining that a preconfigured deceleration braking condition is satisfied, and
• slip-control the engine clutch based on determining that an acceleration pedal is operated before a car stop holding time while the shifting is prohibited, in which the preconfigured deceleration braking condition is maintained, exceeds a preconfigured reference time,
• wherein the controller unit is configured to determine that the preconfigured deceleration braking condition is satisfied based on determining that a brake pedal is operated, a car speed is lower than a first car speed, and a braking torque is larger than a first torque, and
• wherein the car stop holding time includes a time during which the car speed is maintained lower than the first car speed and the braking torque is maintained higher than the first torque.