| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic circuit for construction equipment, which can avoid increase of fuel consumption even if work requiring a sharply increasing load is frequently carried out with an interval of tilting starting pressure therebetween. SOLUTION: The hydraulic circuit for the construction equipment includes a variable discharge amount hydraulic pump, and an input torque setting means for changing a discharge amount control starting pressure of the hydraulic pump. The hydraulic circuit is comprised of a pressure detector for detecting a discharge pressure of the hydraulic pump, and a controller allowing output of the pressure detector to be connected to an input terminal thereof and having an output terminal thereof connected to the input torque setting means. If a measured pressure detected by the pressure detector is lower than a discharge amount control starting pressure of an original control system, the controller sets an input torque such that a discharge amount control starting pressure of a new control system is slightly higher than the measured pressure. COPYRIGHT: (C)2005,JPO&NCIPI
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