Patent ID: 8560185
Filing Date: 2013-10-15
Classification: E02F,F02D

Abstract:
1. A control unit for a construction machine, the construction machine comprising: an engine; a hydraulic pump driven by the engine; a hydraulic actuator driven by hydraulic fluid delivered from the hydraulic pump; a valve for controlling flow of the hydraulic fluid supplied from the hydraulic pump to the hydraulic actuator; an operating device for controlling the valve by outputting an operation signal that varies according to an operation amount; a sensor that detects a state quantity associated with an environment of the engine; and a device for inputting speed of the engine; the control unit comprising: a section for setting a target speed of the engine to an idle speed that is lower than the speed input by the speed input device when the operating device does not output the operation signal after a lapse of a predetermined period of time; and a section for controlling speed of the engine based on the target speed set by the target speed setting section, wherein the target speed setting section includes an idle speed setting section for correcting the idle speed according to a value detected by the sensor so that an output of the engine can be prevented from being reduced due to a change in the state quantity.