Patent ID: 6564548
Filing Date: 2003-05-20
Classification: B66C,E02F

Abstract:
A speed control apparatus of a working vehicle controlling a working speed of each of actuators at a time of being in a crane mode, comprising:setting means for a maximum engine speed to be set at a time of being switched to the crane mode; setting means for setting a proper pump absorbing torque curve at the time of being switched to the crane mode; setting means for setting a pump discharge amount introduced from an intersecting point of an engine speed torque curve at said maximum engine speed with said proper pump absorbing toque curve to be an upper limit; setting means for an optional pump absorbing torque curve being within a range of said engine speed torque curve and capable of obtaining an optional pump discharge amount which is smaller than said pump discharge amount set as said upper limit and which is larger than a pump discharge amount introduced from the pump absorbing torque in correspondence to a minimum engine speed at the time of being in the crane mode; and setting means for setting a pump tilt and rotation angle in correspondence to a change of the pump absorbing torque.