Patent ID: 8789644

Claim:
A construction vehicle comprising: an engine; a travel hydraulic pump configured to be driven by the engine; a travel hydraulic motor configured to be driven by hydraulic fluid discharged from the travel hydraulic pump; an accelerator pedal configured to adjust an accelerator opening degree according to a pressed amount thereof; a hydraulic sensor configured to detect a pressure of the hydraulic fluid sent from the travel hydraulic pump to the travel hydraulic motor; an engine controller configured to adjust an output torque from the engine; and a controller programmed to change a matching point of an absorption torque curve for the travel hydraulic pump with respect to an output torque curve for the engine from a low-engine speed side to a high-engine speed side when a first condition is met, and to change the matching point from the high-engine speed side to the low-engine speed side when a second condition is met, the first condition being satisfied when a vehicle speed and the accelerator opening degree are prescribed values or higher, and at least one of the engine speed is a specific value or lower, a hydrostatic transmission pressure sent from the hydraulic sensor is a prescribed value or lower, and the output torque adjusted by the engine controller is a prescribed value or higher, and the second condition being satisfied when one of the vehicle speed, the hydrostatic transmission pressure and the output torque adjusted by the engine controller is a prescribed value or lower.