| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of steps at shipping/inspection of a construction machine and the load on a service engineer, and to completely remove difference due to individuals, without being influenced by skill levels by correcting the difference of individuals of a pressure control valve at a controller side. SOLUTION: An IP characteristic L which is to become a reference is stored in an IP characteristic data storage part 122 of a controller 120. The reference IP characteristic becomes a set pressure Pf (filling set pressure Pf) of a hydraulic switch 112 at when there is a command current I deg.. A command current feed part 123 of the controller 120 imparts a command current I to a proportional solenoid pressure reducing valve 111. When a feed pressure P to a hydraulic clutch arrives at the set pressure Pf of the hydraulic switch 112 at time tf, during a period from the time t2 to the time t3, the hydraulic switch is turned on and the on signal is inputted to the controller 120. The controller 120 measures the current value of the command current, when it becomes the set pressure Pf and determines the correction amount for correcting the reference IP characteristic L asΔI=If-Io. The reference IP characteristic L is corrected to a characteristic L', based on the correction amountΔI. |
