Caterpillar Sarl

Masafumi Ohkubo

Shogo Tada

Yozo Nakamoto

A work machine has a work device mounted on a machine body including a fluid pressure motor for travelling. A controller reduces engine speed to be lower than rated engine speed during normal working mode. The controller controls engine speed so as to obtain a pump flow rate in accordance with a target travelling speed during travelling low-load mode when engine load is lower than a threshold. The controller controls both the engine speed and output torque for pump control so that the engine output becomes maximum in travelling high-load mode when the engine load is higher than the threshold.

Growing community of inventors

Tokyo, Japan

Masafumi Ohkubo