WORK VEHICLE AND CONTROL METHOD FOR SAME

摘要

A control unit of a work vehicle has a transmission requirement determination unit, a command-torque determination unit, and a tractive force limiting unit. The transmission requirement determination unit determines a required tractive force on the basis of an operating amount of an accelerator operating member. The required tractive force is a target tractive force of a travel device. The command-torque determination unit determines an output torque of the electric motor so that the tractive force of the vehicle reaches the required tractive force. The tractive force limiting unit reduces the required tractive force to a value less than a value corresponding to the operating amount of the accelerator operating member when the vehicle is excavating.

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 power transmission device having an electric motor; a travel device that causes the vehicle to travel due to driving power outputted from the power transmission device; an accelerator operating member; and a control unit configured to control the power transmission device; the control unit including
a transmission requirement determination unit for determining, on the basis of an operating amount of the accelerator operating member, a required tractive force that is a target tractive force of the travel device;a command-torque determination unit for determining an output torque of the electric motor so that the tractive force of the vehicle reaches the required tractive force; anda tractive force limiting unit for reducing the required tractive force to a value lower than a value corresponding to the operating amount of the accelerator operating member while the vehicle is excavating.