Patent ID: 7974756

Claim:
A construction vehicle comprising: an engine; a hydraulic pump configured to be driven by the engine; a traveling hydraulic motor configured to be driven by pressured oil discharged by the hydraulic pump; a traveling wheel configured to be driven by driving force of the traveling hydraulic motor; a control unit configured to control a vehicle velocity and a traction force by controlling rotation speed of the engine, capacity of the hydraulic pump, and capacity of the traveling hydraulic motor; and a vehicle velocity detection unit configured to detect the vehicle velocity, the control unit being further configured to perform slip reduction control for reducing maximum rotation speed of the engine as the vehicle velocity becomes slow in a low-velocity range in which the vehicle velocity is less than or equal to a predetermined velocity, the control unit being configured to control the maximum rotation speed of the engine under the slip reduction control to obtain a vehicle velocity-traction force property in which a maximum traction force is generated at a first velocity slower than a second velocity at which the maximum traction force is generated when the slip reduction control is not performed.