Apparatus for controlling a construction machine
US5077973A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1990 |
| Grant date | Jan 7, 1992 |
| Priority date | — |
| Expiry date | Mar 27, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F9/2296
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
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…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.