Work vehicle, and control method for work vehicle

A work vehicle including a working machine, the work vehicle comprising:

• an engine;
• a traveling hydraulic pump of a variable displacement type that is driven by the engine;
• a hydraulic motor that forms a closed circuit with the traveling hydraulic pump and that is driven by operating oil discharged from the traveling hydraulic pump;
• a drive wheel driven by the hydraulic motor to allow the work vehicle to travel;
• an accelerator operation unit that increases or decreases a supply amount of fuel to the engine;
• an accelerator operation amount generating unit that receives an actual accelerator operation amount of the accelerator operation unit to generate a control accelerator operation amount;
• an engine control unit that controls the engine according to the control accelerator operation amount;
• and
• a storage unit that stores an increasing speed determination table in which an increasing speed for the control accelerator operation amount is set, wherein
• the accelerator operation amount generating unit obtains a difference between a converted accelerator operation amount of the accelerator operation unit converted from a rotating speed of the engine in a current control cycle and a control accelerator operation amount obtained in a last control cycle, determines an increasing speed of the control accelerator operation amount from the obtained difference by referring to the increasing speed determination table, and changes the control accelerator operation amount to an actual operation amount in the current control cycle with the determined increasing speed.