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Abstract

<P>PROBLEM TO BE SOLVED: To provide a working machine which enables easy re-starting of an engine without driving a hydraulic actuator, whereby fuel consumption and carbon dioxide emission are reduced. <P>SOLUTION: The working machine comprises a hydraulic pump 42 driven by an engine 40, hydraulic actuators 21, 22, 23, 31, 32, and a capacitor 61 for storing electricity when a generator motor 44 is in a power generation mode and for supplying the electricity when the generator motor 44 is in an electrically driven mode. The working machine whose hydraulic actuator is run by operating levers 50, 70 also includes: idling stop control means 110 for stopping idling operation of the engine 40 when a stop condition is met; and engine re-start control means 120 for allowing the engine 40 to be re-started under a condition that a PPC lock lever 79 is disposed in a retreated position when a start command is output from an engine re-start switch 77 in a state that the engine 40 is stopped by the idling stop control means 110. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

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