Patent ID: 6481506
Filing Date: 2002-11-19
Classification: E02F

Abstract:
A dual tilt control system for a work vehicle, the dual tilt control system comprising: a blade pivotably connected to a vehicle body; a pair of left and right tilt cylinders disposed between the blade and the vehicle body; and tilt cylinder controlling means for controlling actuation of the tilt cylinders,the tilt cylinder controlling means comprising a hydraulic circuit comprising: a left tilt cylinder driving hydraulic circuit for supplying pressure oil from a hydraulic pump to the left tilt cylinder, the left tilt cylinder driving hydraulic circuit comprising a left tilt cylinder actuation switching valve; a right tilt cylinder driving hydraulic circuit for supplying the pressure oil from the hydraulic pump to the right tilt cylinder, the right tilt cylinder driving hydraulic circuit comprising a right tilt cylinder actuation switching valve; and a pilot pressure signal circuit for controlling the left tilt cylinder actuation switching valve and the right tilt cylinder actuation switching valve, the pilot pressure signal circuit comprising a pilot switching valve for switching the blade between a pitch operation, a single tilt operation and a dual tilt operation by means of the left and right tilt cylinders, wherein the left tilt cylinder driving hydraulic circuit and the right tilt cylinder driving hydraulic circuit are arranged in parallel.