| 摘要 |
PCT No. PCT/JP89/00721 Sec. 371 Date Mar. 27, 1990 Sec. 102(e) Date Mar. 27, 1990 PCT Filed Jul. 19, 1989 PCT Pub. No. WO90/01587 PCT Pub. Date Feb. 22, 1990.An apparatus for controlling a power shovel or like construction machine which assures that various control modes for performing certain operations can reliably be selected by merely activating a switch corresponding to the operation to be performed. When a certain operation is selected, a CPU and an operation panel inputs a signal indicative of the selected operation into a pump controller. The pump controller outputs a signal indicative of the magnitude of the target engine revolution number and a magnitude of composite suction torque of the pumps adapted to the selected operation to an electric governor controller and a TVC valve. In response to this signal, the governor controller controls a governor and swash plates of the pumps such that the target engine revolution number is reached and the output torque from the engine matches the composite suction torque of the pumps. The pump controller outputs an activating signal to a solenoid between an actuating level and an actuating valve corresponding to the selected operation and outputs a deceleration signal to the electric governor controller corresponding to the selected operation. When the activating signal is outputted to the solenoid, pressurized hydraulic oil discharged from one pump does not deliver to a cylinder. When the deceleration signal is inputted into the electric governor controller and the actuating level is in a neutral position, the governor controller reduces the engine revolutions to a preset lower number.
|
