LOW FUEL CONSUMPTION OPERATING METHOD FOR CONSTRUCTION MACHINE

摘要

PURPOSE:To realize the working under the best fuel consumption by controlling the position of a rack by use of a rack sensor. CONSTITUTION:An engine rotating speed NE and a rack position RW are detected by an engine rotating speed detector 7 and a rack position detector 2, and stored. A target rack position RWm is calculated from the position characteristic of a control rack for controlling the fuel injection quantity of an engine and an engine fuel consumption ratio curve. An inclination command signal Q is calculated from the difference (deviation) between the target rack position RWm and the detected rack position RW. Further, the command signal Q is outputted to the swash plate operating mechanism 6 of a hydraulic pump 5 to control the hydraulic pump 5.