Patent ID: 7637103

Claim:
A hydraulic control arrangement for damping wagging vibrations of a mobile work machine, comprising: a hydraulic cylinder for actuating a work tool; a damping valve arrangement via which a first pressure chamber of the hydraulic cylinder which is active in support direction is adapted to be connected with a hydraulic accumulator for wagging vibration damping; and a pressure chamber of the hydraulic cylinder which is active in lowering direction is adapted to be connected with a tank or low pressure, and via which the hydraulic accumulator is, during a working cycle of the hydraulic cylinder, adapted to be connected with an accumulator line for filling, and with the tank or low pressure for adapting the accumulator pressure to the load pressure of the hydraulic cylinder, wherein said damping valve arrangement comprises a nozzle valve arrangement with two different shuttle nozzles, the larger shuttle nozzle of which is active during filling, and the smaller shuttle nozzle of which is active during adaptation, wherein said damping valve arrangement comprises: a pilot-controlled directional control valve which locks, in a basic position, a connection between said first pressure chamber and said hydraulic accumulator and between said second pressure chamber and said tank, and which opens these connections in a switching position, wherein the pilot control is performed with an electrically actuated pilot valve that impacts, in one position, a control face that is active in opening direction of said directional control valve with the tank or low pressure, and in a second switching position with the accumulator pressure.