The invention relates to a system for determining a swing boom angle 2 of an excavator 1, wherein the excavator 1 comprises a lower part 3, an upper part 4 comprising a cabin 5, the upper part 4 being arranged on the lower part 3 and configured to be rotat...

[Problem] The present invention has been made in view of the above problem; it is an object of the present invention to simplify, in an electrically controlled construction machine, a wiring of a wire harness between a controller and a control valve.[Solut...

[Problem] The present invention has been made in view of the above problem; it is an object of the present invention to simplify, in an electrically controlled construction machine, a wiring of a wire harness between a controller and a control valve.[Solut...

During an operation, a control device (38) for performing output control of an engine (10) determines whether or not the engine (10) and/or an exhaust gas purifying device (18) has a malfunction. If it is determined that the engine (10) and/or the exhaust ...

A control device (34) for driving/controlling an engine (10) on the basis of a signal from a temperature state detector (30), a rotation detector (31), and a rotational speed setting device (32) are provided. The control device (34) includes a start temper...

A control pressure switching valve (57) is disposed between a displacement regulator (26) and a pressure control valve (44). The control pressure switching valve (57) is switched between a control position (j), in which a load sensing control pressure (PLS...

A construction machine hydraulic drive system that performs load sensing control is arranged to be capable of efficiently burning and removing deposits on a filter in an exhaust gas purifying device through pump output increasing control and to be free fro...

Provided is an electrically-operated construction machine that is capable of increasing work efficiency in a battery charging operation. A lock switch 29 provides a closed contact when a lock lever 28 in a cab 6 is placed in an unlock position. A feed port...