Hybrid electric vehicle and method of controlling regenerative braking therefor

A hybrid electric vehicle comprising:

• an engine;
• a first motor directly connected to the engine;
• an engine clutch having a first end connected to the first motor;
• a second motor connected to a second end of the engine clutch and configured to be selectively connected to the first motor through the engine clutch;
• a transmission having an input end directly connected to the second motor;
• and
• a controller configured to:
• determine, in response that a braking request occurs, a state of an engine clutch,
• determine, in response that the engine clutch is in an opened state, whether or not to engage the engine clutch in order to perform additional regenerative braking by using the first motor, and
• control regenerative braking to be performed based on whether or not to engage the engine clutch.