Bulldozer and blade control method

摘要

A bulldozer includes a blade pivotably attached to a vehicle body, a blade operation lever, and a blade control section. The blade operation lever outputs a lowering instruction signal, a holding instruction signal, and a raising instruction signal for the blade. The blade control section controls a height of the blade according the signal input. The blade control section can lower the blade to a predetermined position when the lowering instruction signal and the holding instruction signal are input in order after a transmission has been switched from a state, which is different from an advancing state, to the advancing state. The blade control section can raise the blade to a predetermined position when the raising instruction signal and the holding instruction signal are input in order after a transmission has been switched from a state, which is different from a reversing state, to the reversing state.

主权项

1. A bulldozer comprising:
a blade pivotably attached to a vehicle body; a blade operation lever configured to output a lowering instruction signal, a holding instruction signal, and a raising instruction signal for the blade; and a blade control section configured to control a height of the blade according to the lowering instruction signal or the raising instruction signal when the lowering instruction signal or the raising instruction signal is input, the blade control section being further configured to execute an automatic lowering control of the blade to a predetermined position after a transmission has been switched from a state, which is different from an advancing state, to the advancing state, the blade control section withholding the execution of the automatic lowering control until the transmission has been switched to the advancing state and, thereafter, the lowering instruction signal and the holding instruction signal have been input in order.