Provided is a construction machine that is capable of securing a maintenance space above a hydraulic pump while enabling installation of a NOx reducing catalyst, without incurring a notable increase in cost.
Thus, the present invention is capable of controlling the engine and the hydraulic pump at an operating point where the entire system has a sufficient level of efficiency.
This power source system minimizes capacitor consumption when a hydraulic pump is continuously operating at high pressure, and ensures the ability to assist subsequent normal work.
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