TRAVEL CONTROL DEVICE OF WORKING VEHICLE HAVING BUCKET

摘要

PROBLEM TO BE SOLVED: To automate power distribution to an actuator for excavation work by a wheel loader and to a travel driving actuator, according to a bucket weight.

SOLUTION: A travel control device includes: a circuit HC1 for travel formed by connecting a variable displacement hydraulic pump 2 with a variable displacement hydraulic motor 3 in a closed circuit and having a motor control means 11 controlling the displacement of the hydraulic motor 3; a second circuit HC2 for work for driving hydraulic actuators 114 and 115 for work by pressure oil from a hydraulic pump 4 for work; and a maximum value limiting means 10 limiting the maximum value of the displacement of the hydraulic motor 3 in response to load pressure Pp of the circuit HC2 for work. The maximum value limiting means 10 limits the maximum value of a tilt angle of the hydraulic motor 3 according to the bucket weight and the load pressure of the circuit for work.

COPYRIGHT: (C)2013,JPO&INPIT