| 摘要 |
The invention relates to a pressurized medium operated control system for the boom system of a working machine, which boom system comprises at least a first boom part (P1), a second boom part (P2) and a third boom part (P3) fixed to the working machine, and which control system comprises a first cylinder actuator (S1) fixed between the first boom part (P1) and the second boom part (P2), a second cylinder actuator fixed between the second boom part (P2) and the third boom part (P3), first control means (V1) and second control means (V2) connected to a pressure source (P) and a return line (T). In the invention the control system is arranged to be set in an articulation control mode, wherein the first cylinder actuator (S1) is arranged to be independently controlled by means of the first control means (V1), and the second cylinder actuator (S2) is arranged to be controlled independently by means of the second control means (V2), and arranged also to be set in a direct transfer mode, wherein the second boom part (P2) and the third boom part (P3) are arranged to swing simultaneously to opposite directions under the control of the second control means (V2), and wherein the first cylinder actuator (S1) and the second cylinder actuator (S2) are coupled in series. |
