Patent ID: 8424302

Claim:
A control device of an engine comprising: a hydraulic pump driven by the engine; hydraulic actuators supplied with pressurized fluid discharged from the hydraulic pump; an operation unit for operating each hydraulic actuator; a detection unit for detecting an operation amount of the operation unit; a target flow rate calculating unit for calculating a target flow rate of the hydraulic pump based on the operation amount of the operation unit; a first target revolution calculating unit for calculating a first target revolution of the engine according to the target flow rate; an operation state determining unit for determining a switch of the operation unit from a non-operation state to an operation state; a second target revolution setting unit for setting the target revolution of the engine to a second target revolution which is higher than a low idle revolution when determined that switch is made to the operation state by the operation state determining unit; and a revolution control unit for controlling the engine revolution to match the higher target revolution of the first target revolution and the second target revolution.