WORK VEHICLE AND WORK VEHICLE CONTROL METHOD FOR CHARGING

摘要

A power transmission device includes a gear mechanism, a predetermined controlling rotation element, an energy-generating motor, and a connected motor connected to the controlling rotation element. The energy storage unit is configured to store the energy generated by the energy-generating motor. The gear mechanism includes a first planetary gear mechanism, which includes a first rotation element, a second rotation element, and a third rotation element, which are mutually different. The engine is connected to the first rotation element. The energy-generating motor is connected to the third rotation element. The controlling rotation element may be at least one of the rotation elements between the second rotation element and the connected motor. The controller controls the locking of the controlling rotation element to thereby lock the second rotation element, and causes the energy-generating motor to rotate using the drive power from the engine to thereby accumulate energy in the energy storage unit.

主权项

1. A work vehicle comprising:
an engine; a hydraulic pump driven by the engine; a work implement driven by hydraulic fluid discharged from the hydraulic pump; a travel apparatus driven by the engine; a power transmission device including an input shaft, an output shaft, a gear mechanism, a predetermined controlling rotation element, an energy-generating motor, and a connected motor connected to the controlling rotation element, the power transmission device being configured to transmit the drive power from the engine to the travel apparatus; a controller configured to control the power transmission device; and an energy storage unit configured to store the energy generated by the energy-generating motor; the power transmission device being configured such that changing the speed of the energy-generating motor or the connected motor changes the speed ratio of the output shaft relative to the input shaft in the power transmission device; the gear mechanism including a first planetary gear mechanism, the gear mechanism being configured to transmit the rotations of the input shaft to the output shaft; the first planetary gear mechanism including a first rotation element, a second rotation element, and a third rotation element which are mutually different; the engine being connected to the first rotation element; the connected motor being connected to the second rotation element; the energy-generating motor being connected to the third rotation element; and the controlling rotation element being at least one of the rotation elements between the second rotation element and the connected motor; the controller being configured to
control the locking of the controlling rotation element to thereby lock the second rotation element, andcause the energy-generating motor to rotate using the drive power from the engine to thereby accumulate energy in the energy storage unit.