| 主权项 |
1. A working machine control system configured to control a working machine having a first actuator and a second actuator, comprising:
a split flow type fluid pressure pump configured to discharge a working fluid from a first discharge port and a second discharge port; a first circuit system to which a working fluid discharged from the first discharge port is supplied, the first circuit system having a first operation valve configured to control the first actuator, and a first neutral passage providing communication between the first discharge port and a tank in a state where the first operation valve is placed at a normal position; a second circuit system to which a working fluid discharged from the second discharge port is supplied, the second circuit system having a second operation valve configured to control the second actuator, and a second neutral passage providing communication between the second discharge port and the tank in a state where the second operation valve is placed at a normal position; and a lower pressure selection circuit configured to select and communicate with a working fluid of lower pressure among a working fluid on the downstream of the first operation valve of the first neutral passage, and a working fluid on the downstream of the second operation valve of the second neutral passage, wherein the fluid pressure pump includes a swash plate whose inclination angle is adjusted by a single regulator to be controlled with the pressure of the working fluid selected by the lower pressure selection circuit as pilot pressure, and the discharge flow rate is adjusted by the regulator, the fluid pressure pump being adjusted in such a manner that the lower the pressure of the working fluid selected by the lower pressure selection circuit is, the more a discharge flow rate is increased, and the lower pressure selection circuit includes: a higher pressure selection valve configured to select a working fluid on the high pressure side among the first neutral passage and the second neutral passage, and a switching valve to be switched by pressure of the working fluid selected by the higher pressure selection valve, the switching valve being configured to block the working fluid ont the high pressure side among the first neutral passage and the second neutral passage, and guide a working fluid on the low pressure side to the regulator as the pilot pressure, |
