Hybrid electric vehicle

A hybrid electric vehicle, comprising:

• an engine;
• a filter that collects particulate matter from the engine;
• a motor located on a power transmission path between the engine and a drive wheel;
• a torque converter located on the power transmission path between the motor and the drive wheel and including a lock-up clutch;
• a battery that supplies power to the motor;
• and
• a control device,
• the control device configured to:
• determine whether there is a request for regeneration control of the filter by a fuel cut in the engine,
• determine whether the lock-up clutch is not engageable,
• determine whether the motor is able to assist with the rotation of the engine, based on at least one of the following values of the battery:
• a temperature, a voltage, and a level of charge, and
• in a case where the control device determines that there is the request for regeneration control, the lock-up clutch is not engageable, and the motor is able to assist with the rotation of the engine, disengage the lock-up clutch and perform auxiliary regeneration control with the motor assisting with rotation of the engine while performing the fuel cut.