Forklift and method for controlling forklift

A forklift comprising:

• an engine;
• a travel hydraulic pump which is a variable displacement pump driven by the engine;
• a hydraulic motor which forms a closed circuit with the travel hydraulic pump and is driven with working fluid discharged from the travel hydraulic pump;
• a driving wheel driven by the hydraulic motor;
• a lift pressure detecting device which detects lift pressure in a lift cylinder which raises or lowers a fork for mounting a load;
• a pump pressure detecting device which detects a pump pressure that is a pressure of working fluid discharged from the travel hydraulic pump;
• a storage unit which stores a first output characteristic group, a second output characteristic group, and a predetermined lift pressure setting value, the first output characteristic group including a plurality of output characteristics each of which represents a relation between a rotational speed of the engine and a torque generated in the engine for each of a plurality of lift pressures, the second output characteristic group including a plurality of output characteristics each of which represents a relation between the rotational speed and the torque for each of a plurality of pump pressures;
• and
• a control device which determines a greater one of a first target torque and a second target torque as a target torque of the engine, the first target torque being calculated from an output characteristic selected from the first output characteristic group, using the lift pressure setting value or an actual lift pressure detected by the lift pressure detecting device, and the rotational speed of the engine, the second target torque being calculated from an output characteristic selected from the second output characteristic group, using the pump pressure, and the rotational speed of the engine.