Control system for working machine

A control system for an engine (E) of a working machine, for controlling the engine according to working characteristics of an implement driven by the engine,

• wherein an engine control unit (He) and a separate control unit separate from said engine control unit are interconnected via a data communication network;
• a memory of said engine control unit stores fuel supply amount setting data and a memory of said separate control unit stores engine control instruction setting data of control characteristics according to the working characteristics of the implement;
• said separate control unit or said engine control unit calculates instruction information comprising an instruction engine rotational speed (A) and an instruction engine torque, based upon said engine control instruction setting data;
• said engine control unit (He) calculates a target fuel supply amount (C) of an engine fuel supplying device based on said instruction information and said fuel supply amount setting data, and said engine control unit controls a fuel supply amount of the engine fuel supplying device, based on said target fuel supply amount (C).