Multi-mode power trains with direct-drive lock-up

A multi-mode power train for receiving and transmitting power from an engine, the multi-mode power train comprising:

• a power-conversion device in communication with the engine via a direct mechanical power-transfer connection that extends from the engine to the power-conversion device;
• a continuously variable power source in communication with the power-conversion device via an intermediate power-transfer connection;
• a lock-up device including a clutch assembly and a gear located between the power-conversion device and the continuously variable power source, the lock-up device having first and second engagement states;
• and
• a power-output connection;
• wherein, with the lock-up device in the first engagement state, the power-conversion device receives mechanical power from the engine via the direct mechanical power-transfer connection and converts the received mechanical power to a non-mechanical form, the continuously variable power source receives the non-mechanical power from the power-conversion device via the intermediate power-transfer connection and converts the received non-mechanical power to mechanical power, and the continuously variable power source transmits the mechanical power to the power-output connection via the clutch assembly and the gear;
• and
• wherein, with the lock-up device in the second engagement state, the engine transmits mechanical power through the clutch assembly and the gear to the power-output connection.