초록 ▼

A multi-mode power train and multi-mode vehicle include a A power-conversion device that is in communication with an engine via a direct mechanical power-transfer connection extending from the engine to the power-conversion device. A continuously variable power source (CVP) is in communication with

A multi-mode power train and multi-mode vehicle include a A power-conversion device that is in communication with an engine via a direct mechanical power-transfer connection extending from the engine to the power-conversion device. A continuously variable power source (CVP) is in communication with the power conversion device via an intermediate power-transfer connection. A lock-up device with first and second engagement states is provided between the engine and the power-conversion device or the CVP. With the lock-up device in the first engagement state, mechanical power from the engine is converted by the power-conversion device for use by the CVP, with the CVP using the converted power to provide mechanical power to a power-output connection. With the lock-up device in the second engagement state, the engine transmits mechanical power through the lock-up device to the power-output connection.

대표청구항 ▼

1. 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 continuou

1. 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; anda 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; andwherein, 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. 2. The multi-mode power train of claim 1, wherein the power-conversion device includes a hydraulic pump, and the continuously variable power source includes a hydraulic motor. 3. The multi-mode power train of claim 1, wherein the power-conversion device includes an electric generator, and the continuously variable power source includes a electric motor. 4. The multi-mode power train of claim 1, wherein the engine, the power-conversion device, the lock-up device, and the continuously variable power source are arranged in series. 5. The multi-mode power train of claim 1, further comprising: an energy storage device in communication with the continuously variable power source and the power-conversion device;wherein, in a first mode the energy storage device receives energy for storage from at least one of the power-conversion device and the continuously variable power source; andwherein, in a second mode, the energy storage device provides stored energy from the energy storage device to the continuously variable power source. 6. A work vehicle for operation in multiple powered modes, the work vehicle comprising: an engine;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; anda 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; andwherein, 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. 7. The work vehicle of claim 6, wherein the power-conversion device includes a hydraulic pump, and the continuously variable power source includes a hydraulic motor. 8. The work vehicle of claim 6, wherein the power-conversion device includes an electric generator, and the continuously variable power source includes a electric motor. 9. The work vehicle of claim 6, wherein the engine, the power-conversion device, the lock-up device, and the continuously variable power source are arranged in series. 10. The work vehicle of claim 6, further comprising: an energy storage device in communication with the continuously variable power source and the power-conversion device;wherein, in a first mode the energy storage device receives energy for storage from at least one of the power-conversion device and the continuously variable power source; andwherein, in a second mode, the energy storage device provides stored energy from the energy storage device to the continuously variable power source.